merge conflicts

.gitignore

@@ -17,3 +17,6 @@
 *~
 .project
 .settings
+
+cmd/ethereum/ethereum
+cmd/mist/mist

.travis.yml

@@ -12,8 +12,9 @@ install:
   - if ! go get code.google.com/p/go.tools/cmd/cover; then go get golang.org/x/tools/cmd/cover; fi
   - go get github.com/mattn/goveralls
   - go get gopkg.in/check.v1
-  - DEPS=$(go list -f '{{.Imports}}' ./... | sed -e 's/\[//g' | sed -e 's/\]//g' | sed -e 's/C //g'); if [ "$DEPS" ]; then go get -d -v $DEPS; fi
+  - go get github.com/tools/godep
 before_script:
+  - godep restore
   - gofmt -l -w .
   - goimports -l -w .
   - golint .

Dockerfile

@@ -1,27 +1,26 @@
-FROM ubuntu:14.04
+FROM ubuntu:14.04.1
 
 ## Environment setup
 ENV HOME /root
 ENV GOPATH /root/go
-ENV PATH /golang/bin:/root/go/bin:/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
+ENV PATH /root/go/bin:/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
-ENV PKG_CONFIG_PATH /opt/qt54/lib/pkgconfig
 
 RUN mkdir -p /root/go
 ENV DEBIAN_FRONTEND noninteractive
 
 ## Install base dependencies
 RUN apt-get update && apt-get upgrade -y
-RUN apt-get install -y git mercurial build-essential software-properties-common pkg-config libgmp3-dev libreadline6-dev libpcre3-dev libpcre++-dev mesa-common-dev libglu1-mesa-dev
+RUN apt-get install -y git mercurial build-essential software-properties-common wget pkg-config libgmp3-dev libreadline6-dev libpcre3-dev libpcre++-dev
 
-## Install Qt5.4 dependencies from PPA
+## Install Qt5.4
-RUN add-apt-repository ppa:beineri/opt-qt54-trusty -y
+# RUN add-apt-repository ppa:beineri/opt-qt54-trusty -y
-RUN apt-get update -y
+# RUN apt-get update -y
-RUN apt-get install -y qt54quickcontrols qt54webengine 
+# RUN apt-get install -y qt54quickcontrols qt54webengine mesa-common-dev libglu1-mesa-dev
+# ENV PKG_CONFIG_PATH /opt/qt54/lib/pkgconfig
 
-## Build and install latest Go
+# Install Golang
-RUN git clone https://go.googlesource.com/go golang
+RUN wget https://storage.googleapis.com/golang/go1.4.1.linux-amd64.tar.gz
-RUN cd golang && git checkout go1.4.1
+RUN tar -C /usr/local -xzf go*.tar.gz && go version
-RUN cd golang/src && ./make.bash && go version
 
 # this is a workaround, to make sure that docker's cache is invalidated whenever the git repo changes
 ADD https://api.github.com/repos/ethereum/go-ethereum/git/refs/heads/develop file_does_not_exist

Godeps/Godeps.json

@@ -0,0 +1,130 @@
+{
+	"ImportPath": "github.com/ethereum/go-ethereum",
+	"GoVersion": "go1.4",
+	"Packages": [
+		"./..."
+	],
+	"Deps": [
+		{
+			"ImportPath": "bitbucket.org/kardianos/osext",
+			"Comment": "null-13",
+			"Rev": "5d3ddcf53a508cc2f7404eaebf546ef2cb5cdb6e"
+		},
+		{
+			"ImportPath": "code.google.com/p/go-uuid/uuid",
+			"Comment": "null-12",
+			"Rev": "7dda39b2e7d5e265014674c5af696ba4186679e9"
+		},
+		{
+			"ImportPath": "code.google.com/p/go.crypto/pbkdf2",
+			"Comment": "null-236",
+			"Rev": "69e2a90ed92d03812364aeb947b7068dc42e561e"
+		},
+		{
+			"ImportPath": "code.google.com/p/go.crypto/ripemd160",
+			"Comment": "null-236",
+			"Rev": "69e2a90ed92d03812364aeb947b7068dc42e561e"
+		},
+		{
+			"ImportPath": "code.google.com/p/go.crypto/scrypt",
+			"Comment": "null-236",
+			"Rev": "69e2a90ed92d03812364aeb947b7068dc42e561e"
+		},
+		{
+			"ImportPath": "code.google.com/p/go.net/websocket",
+			"Comment": "null-173",
+			"Rev": "4231557d7c726df4cf9a4e8cdd8a417c8c200bdb"
+		},
+		{
+			"ImportPath": "code.google.com/p/snappy-go/snappy",
+			"Comment": "null-15",
+			"Rev": "12e4b4183793ac4b061921e7980845e750679fd0"
+		},
+		{
+			"ImportPath": "github.com/ethereum/serpent-go",
+			"Rev": "5767a0dbd759d313df3f404dadb7f98d7ab51443"
+		},
+		{
+			"ImportPath": "github.com/fjl/goupnp",
+			"Rev": "fa95df6feb61e136b499d01711fcd410ccaf20c1"
+		},
+		{
+			"ImportPath": "github.com/howeyc/fsnotify",
+			"Comment": "v0.9.0-11-g6b1ef89",
+			"Rev": "6b1ef893dc11e0447abda6da20a5203481878dda"
+		},
+		{
+			"ImportPath": "github.com/jackpal/go-nat-pmp",
+			"Rev": "a45aa3d54aef73b504e15eb71bea0e5565b5e6e1"
+		},
+		{
+			"ImportPath": "github.com/obscuren/ecies",
+			"Rev": "d899334bba7bf4a157cab19d8ad836dcb1de0c34"
+		},
+		{
+			"ImportPath": "github.com/obscuren/otto",
+			"Rev": "cf13cc4228c5e5ce0fe27a7aea90bc10091c4f19"
+		},
+		{
+			"ImportPath": "github.com/obscuren/qml",
+			"Rev": "807b51d4104231784fa5e336ccd26d61759a3cb2"
+		},
+		{
+			"ImportPath": "github.com/rakyll/globalconf",
+			"Rev": "415abc325023f1a00cd2d9fa512e0e71745791a2"
+		},
+		{
+			"ImportPath": "github.com/rakyll/goini",
+			"Rev": "907cca0f578a5316fb864ec6992dc3d9730ec58c"
+		},
+		{
+			"ImportPath": "github.com/robertkrimen/otto/ast",
+			"Rev": "dea31a3d392779af358ec41f77a07fcc7e9d04ba"
+		},
+		{
+			"ImportPath": "github.com/robertkrimen/otto/dbg",
+			"Rev": "dea31a3d392779af358ec41f77a07fcc7e9d04ba"
+		},
+		{
+			"ImportPath": "github.com/robertkrimen/otto/file",
+			"Rev": "dea31a3d392779af358ec41f77a07fcc7e9d04ba"
+		},
+		{
+			"ImportPath": "github.com/robertkrimen/otto/parser",
+			"Rev": "dea31a3d392779af358ec41f77a07fcc7e9d04ba"
+		},
+		{
+			"ImportPath": "github.com/robertkrimen/otto/registry",
+			"Rev": "dea31a3d392779af358ec41f77a07fcc7e9d04ba"
+		},
+		{
+			"ImportPath": "github.com/robertkrimen/otto/token",
+			"Rev": "dea31a3d392779af358ec41f77a07fcc7e9d04ba"
+		},
+		{
+			"ImportPath": "github.com/syndtr/goleveldb/leveldb",
+			"Rev": "832fa7ed4d28545eab80f19e1831fc004305cade"
+		},
+		{
+			"ImportPath": "golang.org/x/crypto/pbkdf2",
+			"Rev": "4ed45ec682102c643324fae5dff8dab085b6c300"
+		},
+		{
+			"ImportPath": "gopkg.in/check.v1",
+			"Rev": "64131543e7896d5bcc6bd5a76287eb75ea96c673"
+		},
+		{
+			"ImportPath": "gopkg.in/fatih/set.v0",
+			"Comment": "v0.1.0-3-g27c4092",
+			"Rev": "27c40922c40b43fe04554d8223a402af3ea333f3"
+		},
+		{
+			"ImportPath": "gopkg.in/qml.v1/cdata",
+			"Rev": "1116cb9cd8dee23f8d444ded354eb53122739f99"
+		},
+		{
+			"ImportPath": "gopkg.in/qml.v1/gl/glbase",
+			"Rev": "1116cb9cd8dee23f8d444ded354eb53122739f99"
+		}
+	]
+}

Godeps/Readme

@@ -0,0 +1,5 @@
+This directory tree is generated automatically by godep.
+
+Please do not edit.
+
+See https://github.com/tools/godep for more information.

Godeps/_workspace/.gitignore

@@ -0,0 +1,2 @@
+/pkg
+/bin

Godeps/_workspace/src/bitbucket.org/kardianos/osext/LICENSE

@@ -0,0 +1,20 @@
+Copyright (c) 2012 Daniel Theophanes
+
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
+
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
+
+   1. The origin of this software must not be misrepresented; you must not
+   claim that you wrote the original software. If you use this software
+   in a product, an acknowledgment in the product documentation would be
+   appreciated but is not required.
+
+   2. Altered source versions must be plainly marked as such, and must not be
+   misrepresented as being the original software.
+
+   3. This notice may not be removed or altered from any source
+   distribution.

Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext.go

@@ -0,0 +1,32 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Extensions to the standard "os" package.
+package osext
+
+import "path/filepath"
+
+// Executable returns an absolute path that can be used to
+// re-invoke the current program.
+// It may not be valid after the current program exits.
+func Executable() (string, error) {
+	p, err := executable()
+	return filepath.Clean(p), err
+}
+
+// Returns same path as Executable, returns just the folder
+// path. Excludes the executable name.
+func ExecutableFolder() (string, error) {
+	p, err := Executable()
+	if err != nil {
+		return "", err
+	}
+	folder, _ := filepath.Split(p)
+	return folder, nil
+}
+
+// Depricated. Same as Executable().
+func GetExePath() (exePath string, err error) {
+	return Executable()
+}

Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_plan9.go

@@ -0,0 +1,20 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package osext
+
+import (
+    "syscall"
+    "os"
+    "strconv"
+)
+
+func executable() (string, error) {
+    f, err := os.Open("/proc/" + strconv.Itoa(os.Getpid()) + "/text")
+    if err != nil {
+        return "", err
+    }
+    defer f.Close()
+    return syscall.Fd2path(int(f.Fd()))
+}

Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_procfs.go

@@ -0,0 +1,25 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux netbsd openbsd
+
+package osext
+
+import (
+	"errors"
+	"os"
+	"runtime"
+)
+
+func executable() (string, error) {
+	switch runtime.GOOS {
+	case "linux":
+		return os.Readlink("/proc/self/exe")
+	case "netbsd":
+		return os.Readlink("/proc/curproc/exe")
+	case "openbsd":
+		return os.Readlink("/proc/curproc/file")
+	}
+	return "", errors.New("ExecPath not implemented for " + runtime.GOOS)
+}

Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_sysctl.go

@@ -0,0 +1,79 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin freebsd
+
+package osext
+
+import (
+	"os"
+	"path/filepath"
+	"runtime"
+	"syscall"
+	"unsafe"
+)
+
+var initCwd, initCwdErr = os.Getwd()
+
+func executable() (string, error) {
+	var mib [4]int32
+	switch runtime.GOOS {
+	case "freebsd":
+		mib = [4]int32{1 /* CTL_KERN */, 14 /* KERN_PROC */, 12 /* KERN_PROC_PATHNAME */, -1}
+	case "darwin":
+		mib = [4]int32{1 /* CTL_KERN */, 38 /* KERN_PROCARGS */, int32(os.Getpid()), -1}
+	}
+
+	n := uintptr(0)
+	// Get length.
+	_, _, errNum := syscall.Syscall6(syscall.SYS___SYSCTL, uintptr(unsafe.Pointer(&mib[0])), 4, 0, uintptr(unsafe.Pointer(&n)), 0, 0)
+	if errNum != 0 {
+		return "", errNum
+	}
+	if n == 0 { // This shouldn't happen.
+		return "", nil
+	}
+	buf := make([]byte, n)
+	_, _, errNum = syscall.Syscall6(syscall.SYS___SYSCTL, uintptr(unsafe.Pointer(&mib[0])), 4, uintptr(unsafe.Pointer(&buf[0])), uintptr(unsafe.Pointer(&n)), 0, 0)
+	if errNum != 0 {
+		return "", errNum
+	}
+	if n == 0 { // This shouldn't happen.
+		return "", nil
+	}
+	for i, v := range buf {
+		if v == 0 {
+			buf = buf[:i]
+			break
+		}
+	}
+	var err error
+	execPath := string(buf)
+	// execPath will not be empty due to above checks.
+	// Try to get the absolute path if the execPath is not rooted.
+	if execPath[0] != '/' {
+		execPath, err = getAbs(execPath)
+		if err != nil {
+			return execPath, err
+		}
+	}
+	// For darwin KERN_PROCARGS may return the path to a symlink rather than the
+	// actual executable.
+	if runtime.GOOS == "darwin" {
+		if execPath, err = filepath.EvalSymlinks(execPath); err != nil {
+			return execPath, err
+		}
+	}
+	return execPath, nil
+}
+
+func getAbs(execPath string) (string, error) {
+	if initCwdErr != nil {
+		return execPath, initCwdErr
+	}
+	// The execPath may begin with a "../" or a "./" so clean it first.
+	// Join the two paths, trailing and starting slashes undetermined, so use
+	// the generic Join function.
+	return filepath.Join(initCwd, filepath.Clean(execPath)), nil
+}

Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_test.go

@@ -0,0 +1,79 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin linux freebsd netbsd windows
+
+package osext
+
+import (
+	"fmt"
+	"os"
+	oexec "os/exec"
+	"path/filepath"
+	"runtime"
+	"testing"
+)
+
+const execPath_EnvVar = "OSTEST_OUTPUT_EXECPATH"
+
+func TestExecPath(t *testing.T) {
+	ep, err := Executable()
+	if err != nil {
+		t.Fatalf("ExecPath failed: %v", err)
+	}
+	// we want fn to be of the form "dir/prog"
+	dir := filepath.Dir(filepath.Dir(ep))
+	fn, err := filepath.Rel(dir, ep)
+	if err != nil {
+		t.Fatalf("filepath.Rel: %v", err)
+	}
+	cmd := &oexec.Cmd{}
+	// make child start with a relative program path
+	cmd.Dir = dir
+	cmd.Path = fn
+	// forge argv[0] for child, so that we can verify we could correctly
+	// get real path of the executable without influenced by argv[0].
+	cmd.Args = []string{"-", "-test.run=XXXX"}
+	cmd.Env = []string{fmt.Sprintf("%s=1", execPath_EnvVar)}
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		t.Fatalf("exec(self) failed: %v", err)
+	}
+	outs := string(out)
+	if !filepath.IsAbs(outs) {
+		t.Fatalf("Child returned %q, want an absolute path", out)
+	}
+	if !sameFile(outs, ep) {
+		t.Fatalf("Child returned %q, not the same file as %q", out, ep)
+	}
+}
+
+func sameFile(fn1, fn2 string) bool {
+	fi1, err := os.Stat(fn1)
+	if err != nil {
+		return false
+	}
+	fi2, err := os.Stat(fn2)
+	if err != nil {
+		return false
+	}
+	return os.SameFile(fi1, fi2)
+}
+
+func init() {
+	if e := os.Getenv(execPath_EnvVar); e != "" {
+		// first chdir to another path
+		dir := "/"
+		if runtime.GOOS == "windows" {
+			dir = filepath.VolumeName(".")
+		}
+		os.Chdir(dir)
+		if ep, err := Executable(); err != nil {
+			fmt.Fprint(os.Stderr, "ERROR: ", err)
+		} else {
+			fmt.Fprint(os.Stderr, ep)
+		}
+		os.Exit(0)
+	}
+}

Godeps/_workspace/src/bitbucket.org/kardianos/osext/osext_windows.go

@@ -0,0 +1,34 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package osext
+
+import (
+	"syscall"
+	"unicode/utf16"
+	"unsafe"
+)
+
+var (
+	kernel                = syscall.MustLoadDLL("kernel32.dll")
+	getModuleFileNameProc = kernel.MustFindProc("GetModuleFileNameW")
+)
+
+// GetModuleFileName() with hModule = NULL
+func executable() (exePath string, err error) {
+	return getModuleFileName()
+}
+
+func getModuleFileName() (string, error) {
+	var n uint32
+	b := make([]uint16, syscall.MAX_PATH)
+	size := uint32(len(b))
+
+	r0, _, e1 := getModuleFileNameProc.Call(0, uintptr(unsafe.Pointer(&b[0])), uintptr(size))
+	n = uint32(r0)
+	if n == 0 {
+		return "", e1
+	}
+	return string(utf16.Decode(b[0:n])), nil
+}

Godeps/_workspace/src/code.google.com/p/go-uuid/uuid/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2009 Google Inc. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Godeps/_workspace/src/code.google.com/p/go-uuid/uuid/dce.go

@@ -0,0 +1,84 @@
+// Copyright 2011 Google Inc.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package uuid
+
+import (
+	"encoding/binary"
+	"fmt"
+	"os"
+)
+
+// A Domain represents a Version 2 domain
+type Domain byte
+
+// Domain constants for DCE Security (Version 2) UUIDs.
+const (
+	Person = Domain(0)
+	Group  = Domain(1)
+	Org    = Domain(2)
+)
+
+// NewDCESecurity returns a DCE Security (Version 2) UUID.
+//
+// The domain should be one of Person, Group or Org.
+// On a POSIX system the id should be the users UID for the Person
+// domain and the users GID for the Group.  The meaning of id for
+// the domain Org or on non-POSIX systems is site defined.
+//
+// For a given domain/id pair the same token may be returned for up to
+// 7 minutes and 10 seconds.
+func NewDCESecurity(domain Domain, id uint32) UUID {
+	uuid := NewUUID()
+	if uuid != nil {
+		uuid[6] = (uuid[6] & 0x0f) | 0x20 // Version 2
+		uuid[9] = byte(domain)
+		binary.BigEndian.PutUint32(uuid[0:], id)
+	}
+	return uuid
+}
+
+// NewDCEPerson returns a DCE Security (Version 2) UUID in the person
+// domain with the id returned by os.Getuid.
+//
+//  NewDCEPerson(Person, uint32(os.Getuid()))
+func NewDCEPerson() UUID {
+	return NewDCESecurity(Person, uint32(os.Getuid()))
+}
+
+// NewDCEGroup returns a DCE Security (Version 2) UUID in the group
+// domain with the id returned by os.Getgid.
+//
+//  NewDCEGroup(Group, uint32(os.Getgid()))
+func NewDCEGroup() UUID {
+	return NewDCESecurity(Group, uint32(os.Getgid()))
+}
+
+// Domain returns the domain for a Version 2 UUID or false.
+func (uuid UUID) Domain() (Domain, bool) {
+	if v, _ := uuid.Version(); v != 2 {
+		return 0, false
+	}
+	return Domain(uuid[9]), true
+}
+
+// Id returns the id for a Version 2 UUID or false.
+func (uuid UUID) Id() (uint32, bool) {
+	if v, _ := uuid.Version(); v != 2 {
+		return 0, false
+	}
+	return binary.BigEndian.Uint32(uuid[0:4]), true
+}
+
+func (d Domain) String() string {
+	switch d {
+	case Person:
+		return "Person"
+	case Group:
+		return "Group"
+	case Org:
+		return "Org"
+	}
+	return fmt.Sprintf("Domain%d", int(d))
+}

Godeps/_workspace/src/code.google.com/p/go-uuid/uuid/doc.go

@@ -0,0 +1,8 @@
+// Copyright 2011 Google Inc.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// The uuid package generates and inspects UUIDs.
+//
+// UUIDs are based on RFC 4122 and DCE 1.1: Authentication and Security Services.
+package uuid

Godeps/_workspace/src/code.google.com/p/go-uuid/uuid/hash.go

@@ -0,0 +1,53 @@
+// Copyright 2011 Google Inc.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package uuid
+
+import (
+	"crypto/md5"
+	"crypto/sha1"
+	"hash"
+)
+
+// Well known Name Space IDs and UUIDs
+var (
+	NameSpace_DNS  = Parse("6ba7b810-9dad-11d1-80b4-00c04fd430c8")
+	NameSpace_URL  = Parse("6ba7b811-9dad-11d1-80b4-00c04fd430c8")
+	NameSpace_OID  = Parse("6ba7b812-9dad-11d1-80b4-00c04fd430c8")
+	NameSpace_X500 = Parse("6ba7b814-9dad-11d1-80b4-00c04fd430c8")
+	NIL            = Parse("00000000-0000-0000-0000-000000000000")
+)
+
+// NewHash returns a new UUID dervied from the hash of space concatenated with
+// data generated by h.  The hash should be at least 16 byte in length.  The
+// first 16 bytes of the hash are used to form the UUID.  The version of the
+// UUID will be the lower 4 bits of version.  NewHash is used to implement
+// NewMD5 and NewSHA1.
+func NewHash(h hash.Hash, space UUID, data []byte, version int) UUID {
+	h.Reset()
+	h.Write(space)
+	h.Write([]byte(data))
+	s := h.Sum(nil)
+	uuid := make([]byte, 16)
+	copy(uuid, s)
+	uuid[6] = (uuid[6] & 0x0f) | uint8((version&0xf)<<4)
+	uuid[8] = (uuid[8] & 0x3f) | 0x80 // RFC 4122 variant
+	return uuid
+}
+
+// NewMD5 returns a new MD5 (Version 3) UUID based on the
+// supplied name space and data.
+//
+//  NewHash(md5.New(), space, data, 3)
+func NewMD5(space UUID, data []byte) UUID {
+	return NewHash(md5.New(), space, data, 3)
+}
+
+// NewSHA1 returns a new SHA1 (Version 5) UUID based on the
+// supplied name space and data.
+//
+//  NewHash(sha1.New(), space, data, 5)
+func NewSHA1(space UUID, data []byte) UUID {
+	return NewHash(sha1.New(), space, data, 5)
+}

Godeps/_workspace/src/code.google.com/p/go-uuid/uuid/node.go

@@ -0,0 +1,101 @@
+// Copyright 2011 Google Inc.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package uuid
+
+import "net"
+
+var (
+	interfaces []net.Interface // cached list of interfaces
+	ifname     string          // name of interface being used
+	nodeID     []byte          // hardware for version 1 UUIDs
+)
+
+// NodeInterface returns the name of the interface from which the NodeID was
+// derived.  The interface "user" is returned if the NodeID was set by
+// SetNodeID.
+func NodeInterface() string {
+	return ifname
+}
+
+// SetNodeInterface selects the hardware address to be used for Version 1 UUIDs.
+// If name is "" then the first usable interface found will be used or a random
+// Node ID will be generated.  If a named interface cannot be found then false
+// is returned.
+//
+// SetNodeInterface never fails when name is "".
+func SetNodeInterface(name string) bool {
+	if interfaces == nil {
+		var err error
+		interfaces, err = net.Interfaces()
+		if err != nil && name != "" {
+			return false
+		}
+	}
+
+	for _, ifs := range interfaces {
+		if len(ifs.HardwareAddr) >= 6 && (name == "" || name == ifs.Name) {
+			if setNodeID(ifs.HardwareAddr) {
+				ifname = ifs.Name
+				return true
+			}
+		}
+	}
+
+	// We found no interfaces with a valid hardware address.  If name
+	// does not specify a specific interface generate a random Node ID
+	// (section 4.1.6)
+	if name == "" {
+		if nodeID == nil {
+			nodeID = make([]byte, 6)
+		}
+		randomBits(nodeID)
+		return true
+	}
+	return false
+}
+
+// NodeID returns a slice of a copy of the current Node ID, setting the Node ID
+// if not already set.
+func NodeID() []byte {
+	if nodeID == nil {
+		SetNodeInterface("")
+	}
+	nid := make([]byte, 6)
+	copy(nid, nodeID)
+	return nid
+}
+
+// SetNodeID sets the Node ID to be used for Version 1 UUIDs.  The first 6 bytes
+// of id are used.  If id is less than 6 bytes then false is returned and the
+// Node ID is not set.
+func SetNodeID(id []byte) bool {
+	if setNodeID(id) {
+		ifname = "user"
+		return true
+	}
+	return false
+}
+
+func setNodeID(id []byte) bool {
+	if len(id) < 6 {
+		return false
+	}
+	if nodeID == nil {
+		nodeID = make([]byte, 6)
+	}
+	copy(nodeID, id)
+	return true
+}
+
+// NodeID returns the 6 byte node id encoded in uuid.  It returns nil if uuid is
+// not valid.  The NodeID is only well defined for version 1 and 2 UUIDs.
+func (uuid UUID) NodeID() []byte {
+	if len(uuid) != 16 {
+		return nil
+	}
+	node := make([]byte, 6)
+	copy(node, uuid[10:])
+	return node
+}

Godeps/_workspace/src/code.google.com/p/go-uuid/uuid/time.go

@@ -0,0 +1,132 @@
+// Copyright 2014 Google Inc.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package uuid
+
+import (
+	"encoding/binary"
+	"sync"
+	"time"
+)
+
+// A Time represents a time as the number of 100's of nanoseconds since 15 Oct
+// 1582.
+type Time int64
+
+const (
+	lillian    = 2299160          // Julian day of 15 Oct 1582
+	unix       = 2440587          // Julian day of 1 Jan 1970
+	epoch      = unix - lillian   // Days between epochs
+	g1582      = epoch * 86400    // seconds between epochs
+	g1582ns100 = g1582 * 10000000 // 100s of a nanoseconds between epochs
+)
+
+var (
+	mu        sync.Mutex
+	lasttime  uint64 // last time we returned
+	clock_seq uint16 // clock sequence for this run
+
+	timeNow = time.Now // for testing
+)
+
+// UnixTime converts t the number of seconds and nanoseconds using the Unix
+// epoch of 1 Jan 1970.
+func (t Time) UnixTime() (sec, nsec int64) {
+	sec = int64(t - g1582ns100)
+	nsec = (sec % 10000000) * 100
+	sec /= 10000000
+	return sec, nsec
+}
+
+// GetTime returns the current Time (100s of nanoseconds since 15 Oct 1582) and
+// adjusts the clock sequence as needed.  An error is returned if the current
+// time cannot be determined.
+func GetTime() (Time, error) {
+	defer mu.Unlock()
+	mu.Lock()
+	return getTime()
+}
+
+func getTime() (Time, error) {
+	t := timeNow()
+
+	// If we don't have a clock sequence already, set one.
+	if clock_seq == 0 {
+		setClockSequence(-1)
+	}
+	now := uint64(t.UnixNano()/100) + g1582ns100
+
+	// If time has gone backwards with this clock sequence then we
+	// increment the clock sequence
+	if now <= lasttime {
+		clock_seq = ((clock_seq + 1) & 0x3fff) | 0x8000
+	}
+	lasttime = now
+	return Time(now), nil
+}
+
+// ClockSequence returns the current clock sequence, generating one if not
+// already set.  The clock sequence is only used for Version 1 UUIDs.
+//
+// The uuid package does not use global static storage for the clock sequence or
+// the last time a UUID was generated.  Unless SetClockSequence a new random
+// clock sequence is generated the first time a clock sequence is requested by
+// ClockSequence, GetTime, or NewUUID.  (section 4.2.1.1) sequence is generated
+// for
+func ClockSequence() int {
+	defer mu.Unlock()
+	mu.Lock()
+	return clockSequence()
+}
+
+func clockSequence() int {
+	if clock_seq == 0 {
+		setClockSequence(-1)
+	}
+	return int(clock_seq & 0x3fff)
+}
+
+// SetClockSeq sets the clock sequence to the lower 14 bits of seq.  Setting to
+// -1 causes a new sequence to be generated.
+func SetClockSequence(seq int) {
+	defer mu.Unlock()
+	mu.Lock()
+	setClockSequence(seq)
+}
+
+func setClockSequence(seq int) {
+	if seq == -1 {
+		var b [2]byte
+		randomBits(b[:]) // clock sequence
+		seq = int(b[0])<<8 | int(b[1])
+	}
+	old_seq := clock_seq
+	clock_seq = uint16(seq&0x3fff) | 0x8000 // Set our variant
+	if old_seq != clock_seq {
+		lasttime = 0
+	}
+}
+
+// Time returns the time in 100s of nanoseconds since 15 Oct 1582 encoded in
+// uuid.  It returns false if uuid is not valid.  The time is only well defined
+// for version 1 and 2 UUIDs.
+func (uuid UUID) Time() (Time, bool) {
+	if len(uuid) != 16 {
+		return 0, false
+	}
+	time := int64(binary.BigEndian.Uint32(uuid[0:4]))
+	time |= int64(binary.BigEndian.Uint16(uuid[4:6])) << 32
+	time |= int64(binary.BigEndian.Uint16(uuid[6:8])&0xfff) << 48
+	return Time(time), true
+}
+
+// ClockSequence returns the clock sequence encoded in uuid.  It returns false
+// if uuid is not valid.  The clock sequence is only well defined for version 1
+// and 2 UUIDs.
+func (uuid UUID) ClockSequence() (int, bool) {
+	if len(uuid) != 16 {
+		return 0, false
+	}
+	return int(binary.BigEndian.Uint16(uuid[8:10])) & 0x3fff, true
+}

Godeps/_workspace/src/code.google.com/p/go-uuid/uuid/util.go

@@ -0,0 +1,43 @@
+// Copyright 2011 Google Inc.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package uuid
+
+import (
+	"io"
+)
+
+// randomBits completely fills slice b with random data.
+func randomBits(b []byte) {
+	if _, err := io.ReadFull(rander, b); err != nil {
+		panic(err.Error()) // rand should never fail
+	}
+}
+
+// xvalues returns the value of a byte as a hexadecimal digit or 255.
+var xvalues = []byte{
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 255, 255, 255, 255, 255, 255,
+	255, 10, 11, 12, 13, 14, 15, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 10, 11, 12, 13, 14, 15, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+	255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+}
+
+// xtob converts the the first two hex bytes of x into a byte.
+func xtob(x string) (byte, bool) {
+	b1 := xvalues[x[0]]
+	b2 := xvalues[x[1]]
+	return (b1 << 4) | b2, b1 != 255 && b2 != 255
+}

Godeps/_workspace/src/code.google.com/p/go-uuid/uuid/uuid.go

@@ -0,0 +1,163 @@
+// Copyright 2011 Google Inc.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package uuid
+
+import (
+	"bytes"
+	"crypto/rand"
+	"fmt"
+	"io"
+	"strings"
+)
+
+// A UUID is a 128 bit (16 byte) Universal Unique IDentifier as defined in RFC
+// 4122.
+type UUID []byte
+
+// A Version represents a UUIDs version.
+type Version byte
+
+// A Variant represents a UUIDs variant.
+type Variant byte
+
+// Constants returned by Variant.
+const (
+	Invalid   = Variant(iota) // Invalid UUID
+	RFC4122                   // The variant specified in RFC4122
+	Reserved                  // Reserved, NCS backward compatibility.
+	Microsoft                 // Reserved, Microsoft Corporation backward compatibility.
+	Future                    // Reserved for future definition.
+)
+
+var rander = rand.Reader // random function
+
+// New returns a new random (version 4) UUID as a string.  It is a convenience
+// function for NewRandom().String().
+func New() string {
+	return NewRandom().String()
+}
+
+// Parse decodes s into a UUID or returns nil.  Both the UUID form of
+// xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx and
+// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx are decoded.
+func Parse(s string) UUID {
+	if len(s) == 36+9 {
+		if strings.ToLower(s[:9]) != "urn:uuid:" {
+			return nil
+		}
+		s = s[9:]
+	} else if len(s) != 36 {
+		return nil
+	}
+	if s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-' {
+		return nil
+	}
+	uuid := make([]byte, 16)
+	for i, x := range []int{
+		0, 2, 4, 6,
+		9, 11,
+		14, 16,
+		19, 21,
+		24, 26, 28, 30, 32, 34} {
+		if v, ok := xtob(s[x:]); !ok {
+			return nil
+		} else {
+			uuid[i] = v
+		}
+	}
+	return uuid
+}
+
+// Equal returns true if uuid1 and uuid2 are equal.
+func Equal(uuid1, uuid2 UUID) bool {
+	return bytes.Equal(uuid1, uuid2)
+}
+
+// String returns the string form of uuid, xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+// , or "" if uuid is invalid.
+func (uuid UUID) String() string {
+	if uuid == nil || len(uuid) != 16 {
+		return ""
+	}
+	b := []byte(uuid)
+	return fmt.Sprintf("%08x-%04x-%04x-%04x-%012x",
+		b[:4], b[4:6], b[6:8], b[8:10], b[10:])
+}
+
+// URN returns the RFC 2141 URN form of uuid,
+// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx,  or "" if uuid is invalid.
+func (uuid UUID) URN() string {
+	if uuid == nil || len(uuid) != 16 {
+		return ""
+	}
+	b := []byte(uuid)
+	return fmt.Sprintf("urn:uuid:%08x-%04x-%04x-%04x-%012x",
+		b[:4], b[4:6], b[6:8], b[8:10], b[10:])
+}
+
+// Variant returns the variant encoded in uuid.  It returns Invalid if
+// uuid is invalid.
+func (uuid UUID) Variant() Variant {
+	if len(uuid) != 16 {
+		return Invalid
+	}
+	switch {
+	case (uuid[8] & 0xc0) == 0x80:
+		return RFC4122
+	case (uuid[8] & 0xe0) == 0xc0:
+		return Microsoft
+	case (uuid[8] & 0xe0) == 0xe0:
+		return Future
+	default:
+		return Reserved
+	}
+	panic("unreachable")
+}
+
+// Version returns the verison of uuid.  It returns false if uuid is not
+// valid.
+func (uuid UUID) Version() (Version, bool) {
+	if len(uuid) != 16 {
+		return 0, false
+	}
+	return Version(uuid[6] >> 4), true
+}
+
+func (v Version) String() string {
+	if v > 15 {
+		return fmt.Sprintf("BAD_VERSION_%d", v)
+	}
+	return fmt.Sprintf("VERSION_%d", v)
+}
+
+func (v Variant) String() string {
+	switch v {
+	case RFC4122:
+		return "RFC4122"
+	case Reserved:
+		return "Reserved"
+	case Microsoft:
+		return "Microsoft"
+	case Future:
+		return "Future"
+	case Invalid:
+		return "Invalid"
+	}
+	return fmt.Sprintf("BadVariant%d", int(v))
+}
+
+// SetRand sets the random number generator to r, which implents io.Reader.
+// If r.Read returns an error when the package requests random data then
+// a panic will be issued.
+//
+// Calling SetRand with nil sets the random number generator to the default
+// generator.
+func SetRand(r io.Reader) {
+	if r == nil {
+		rander = rand.Reader
+		return
+	}
+	rander = r
+}

Godeps/_workspace/src/code.google.com/p/go-uuid/uuid/uuid_test.go

@@ -0,0 +1,390 @@
+// Copyright 2011 Google Inc.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package uuid
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"strings"
+	"testing"
+	"time"
+)
+
+type test struct {
+	in      string
+	version Version
+	variant Variant
+	isuuid  bool
+}
+
+var tests = []test{
+	{"f47ac10b-58cc-0372-8567-0e02b2c3d479", 0, RFC4122, true},
+	{"f47ac10b-58cc-1372-8567-0e02b2c3d479", 1, RFC4122, true},
+	{"f47ac10b-58cc-2372-8567-0e02b2c3d479", 2, RFC4122, true},
+	{"f47ac10b-58cc-3372-8567-0e02b2c3d479", 3, RFC4122, true},
+	{"f47ac10b-58cc-4372-8567-0e02b2c3d479", 4, RFC4122, true},
+	{"f47ac10b-58cc-5372-8567-0e02b2c3d479", 5, RFC4122, true},
+	{"f47ac10b-58cc-6372-8567-0e02b2c3d479", 6, RFC4122, true},
+	{"f47ac10b-58cc-7372-8567-0e02b2c3d479", 7, RFC4122, true},
+	{"f47ac10b-58cc-8372-8567-0e02b2c3d479", 8, RFC4122, true},
+	{"f47ac10b-58cc-9372-8567-0e02b2c3d479", 9, RFC4122, true},
+	{"f47ac10b-58cc-a372-8567-0e02b2c3d479", 10, RFC4122, true},
+	{"f47ac10b-58cc-b372-8567-0e02b2c3d479", 11, RFC4122, true},
+	{"f47ac10b-58cc-c372-8567-0e02b2c3d479", 12, RFC4122, true},
+	{"f47ac10b-58cc-d372-8567-0e02b2c3d479", 13, RFC4122, true},
+	{"f47ac10b-58cc-e372-8567-0e02b2c3d479", 14, RFC4122, true},
+	{"f47ac10b-58cc-f372-8567-0e02b2c3d479", 15, RFC4122, true},
+
+	{"urn:uuid:f47ac10b-58cc-4372-0567-0e02b2c3d479", 4, Reserved, true},
+	{"URN:UUID:f47ac10b-58cc-4372-0567-0e02b2c3d479", 4, Reserved, true},
+	{"f47ac10b-58cc-4372-0567-0e02b2c3d479", 4, Reserved, true},
+	{"f47ac10b-58cc-4372-1567-0e02b2c3d479", 4, Reserved, true},
+	{"f47ac10b-58cc-4372-2567-0e02b2c3d479", 4, Reserved, true},
+	{"f47ac10b-58cc-4372-3567-0e02b2c3d479", 4, Reserved, true},
+	{"f47ac10b-58cc-4372-4567-0e02b2c3d479", 4, Reserved, true},
+	{"f47ac10b-58cc-4372-5567-0e02b2c3d479", 4, Reserved, true},
+	{"f47ac10b-58cc-4372-6567-0e02b2c3d479", 4, Reserved, true},
+	{"f47ac10b-58cc-4372-7567-0e02b2c3d479", 4, Reserved, true},
+	{"f47ac10b-58cc-4372-8567-0e02b2c3d479", 4, RFC4122, true},
+	{"f47ac10b-58cc-4372-9567-0e02b2c3d479", 4, RFC4122, true},
+	{"f47ac10b-58cc-4372-a567-0e02b2c3d479", 4, RFC4122, true},
+	{"f47ac10b-58cc-4372-b567-0e02b2c3d479", 4, RFC4122, true},
+	{"f47ac10b-58cc-4372-c567-0e02b2c3d479", 4, Microsoft, true},
+	{"f47ac10b-58cc-4372-d567-0e02b2c3d479", 4, Microsoft, true},
+	{"f47ac10b-58cc-4372-e567-0e02b2c3d479", 4, Future, true},
+	{"f47ac10b-58cc-4372-f567-0e02b2c3d479", 4, Future, true},
+
+	{"f47ac10b158cc-5372-a567-0e02b2c3d479", 0, Invalid, false},
+	{"f47ac10b-58cc25372-a567-0e02b2c3d479", 0, Invalid, false},
+	{"f47ac10b-58cc-53723a567-0e02b2c3d479", 0, Invalid, false},
+	{"f47ac10b-58cc-5372-a56740e02b2c3d479", 0, Invalid, false},
+	{"f47ac10b-58cc-5372-a567-0e02-2c3d479", 0, Invalid, false},
+	{"g47ac10b-58cc-4372-a567-0e02b2c3d479", 0, Invalid, false},
+}
+
+var constants = []struct {
+	c    interface{}
+	name string
+}{
+	{Person, "Person"},
+	{Group, "Group"},
+	{Org, "Org"},
+	{Invalid, "Invalid"},
+	{RFC4122, "RFC4122"},
+	{Reserved, "Reserved"},
+	{Microsoft, "Microsoft"},
+	{Future, "Future"},
+	{Domain(17), "Domain17"},
+	{Variant(42), "BadVariant42"},
+}
+
+func testTest(t *testing.T, in string, tt test) {
+	uuid := Parse(in)
+	if ok := (uuid != nil); ok != tt.isuuid {
+		t.Errorf("Parse(%s) got %v expected %v\b", in, ok, tt.isuuid)
+	}
+	if uuid == nil {
+		return
+	}
+
+	if v := uuid.Variant(); v != tt.variant {
+		t.Errorf("Variant(%s) got %d expected %d\b", in, v, tt.variant)
+	}
+	if v, _ := uuid.Version(); v != tt.version {
+		t.Errorf("Version(%s) got %d expected %d\b", in, v, tt.version)
+	}
+}
+
+func TestUUID(t *testing.T) {
+	for _, tt := range tests {
+		testTest(t, tt.in, tt)
+		testTest(t, strings.ToUpper(tt.in), tt)
+	}
+}
+
+func TestConstants(t *testing.T) {
+	for x, tt := range constants {
+		v, ok := tt.c.(fmt.Stringer)
+		if !ok {
+			t.Errorf("%x: %v: not a stringer", x, v)
+		} else if s := v.String(); s != tt.name {
+			v, _ := tt.c.(int)
+			t.Errorf("%x: Constant %T:%d gives %q, expected %q\n", x, tt.c, v, s, tt.name)
+		}
+	}
+}
+
+func TestRandomUUID(t *testing.T) {
+	m := make(map[string]bool)
+	for x := 1; x < 32; x++ {
+		uuid := NewRandom()
+		s := uuid.String()
+		if m[s] {
+			t.Errorf("NewRandom returned duplicated UUID %s\n", s)
+		}
+		m[s] = true
+		if v, _ := uuid.Version(); v != 4 {
+			t.Errorf("Random UUID of version %s\n", v)
+		}
+		if uuid.Variant() != RFC4122 {
+			t.Errorf("Random UUID is variant %d\n", uuid.Variant())
+		}
+	}
+}
+
+func TestNew(t *testing.T) {
+	m := make(map[string]bool)
+	for x := 1; x < 32; x++ {
+		s := New()
+		if m[s] {
+			t.Errorf("New returned duplicated UUID %s\n", s)
+		}
+		m[s] = true
+		uuid := Parse(s)
+		if uuid == nil {
+			t.Errorf("New returned %q which does not decode\n", s)
+			continue
+		}
+		if v, _ := uuid.Version(); v != 4 {
+			t.Errorf("Random UUID of version %s\n", v)
+		}
+		if uuid.Variant() != RFC4122 {
+			t.Errorf("Random UUID is variant %d\n", uuid.Variant())
+		}
+	}
+}
+
+func clockSeq(t *testing.T, uuid UUID) int {
+	seq, ok := uuid.ClockSequence()
+	if !ok {
+		t.Fatalf("%s: invalid clock sequence\n", uuid)
+	}
+	return seq
+}
+
+func TestClockSeq(t *testing.T) {
+	// Fake time.Now for this test to return a monotonically advancing time; restore it at end.
+	defer func(orig func() time.Time) { timeNow = orig }(timeNow)
+	monTime := time.Now()
+	timeNow = func() time.Time {
+		monTime = monTime.Add(1 * time.Second)
+		return monTime
+	}
+
+	SetClockSequence(-1)
+	uuid1 := NewUUID()
+	uuid2 := NewUUID()
+
+	if clockSeq(t, uuid1) != clockSeq(t, uuid2) {
+		t.Errorf("clock sequence %d != %d\n", clockSeq(t, uuid1), clockSeq(t, uuid2))
+	}
+
+	SetClockSequence(-1)
+	uuid2 = NewUUID()
+
+	// Just on the very off chance we generated the same sequence
+	// two times we try again.
+	if clockSeq(t, uuid1) == clockSeq(t, uuid2) {
+		SetClockSequence(-1)
+		uuid2 = NewUUID()
+	}
+	if clockSeq(t, uuid1) == clockSeq(t, uuid2) {
+		t.Errorf("Duplicate clock sequence %d\n", clockSeq(t, uuid1))
+	}
+
+	SetClockSequence(0x1234)
+	uuid1 = NewUUID()
+	if seq := clockSeq(t, uuid1); seq != 0x1234 {
+		t.Errorf("%s: expected seq 0x1234 got 0x%04x\n", uuid1, seq)
+	}
+}
+
+func TestCoding(t *testing.T) {
+	text := "7d444840-9dc0-11d1-b245-5ffdce74fad2"
+	urn := "urn:uuid:7d444840-9dc0-11d1-b245-5ffdce74fad2"
+	data := UUID{
+		0x7d, 0x44, 0x48, 0x40,
+		0x9d, 0xc0,
+		0x11, 0xd1,
+		0xb2, 0x45,
+		0x5f, 0xfd, 0xce, 0x74, 0xfa, 0xd2,
+	}
+	if v := data.String(); v != text {
+		t.Errorf("%x: encoded to %s, expected %s\n", data, v, text)
+	}
+	if v := data.URN(); v != urn {
+		t.Errorf("%x: urn is %s, expected %s\n", data, v, urn)
+	}
+
+	uuid := Parse(text)
+	if !Equal(uuid, data) {
+		t.Errorf("%s: decoded to %s, expected %s\n", text, uuid, data)
+	}
+}
+
+func TestVersion1(t *testing.T) {
+	uuid1 := NewUUID()
+	uuid2 := NewUUID()
+
+	if Equal(uuid1, uuid2) {
+		t.Errorf("%s:duplicate uuid\n", uuid1)
+	}
+	if v, _ := uuid1.Version(); v != 1 {
+		t.Errorf("%s: version %s expected 1\n", uuid1, v)
+	}
+	if v, _ := uuid2.Version(); v != 1 {
+		t.Errorf("%s: version %s expected 1\n", uuid2, v)
+	}
+	n1 := uuid1.NodeID()
+	n2 := uuid2.NodeID()
+	if !bytes.Equal(n1, n2) {
+		t.Errorf("Different nodes %x != %x\n", n1, n2)
+	}
+	t1, ok := uuid1.Time()
+	if !ok {
+		t.Errorf("%s: invalid time\n", uuid1)
+	}
+	t2, ok := uuid2.Time()
+	if !ok {
+		t.Errorf("%s: invalid time\n", uuid2)
+	}
+	q1, ok := uuid1.ClockSequence()
+	if !ok {
+		t.Errorf("%s: invalid clock sequence\n", uuid1)
+	}
+	q2, ok := uuid2.ClockSequence()
+	if !ok {
+		t.Errorf("%s: invalid clock sequence", uuid2)
+	}
+
+	switch {
+	case t1 == t2 && q1 == q2:
+		t.Errorf("time stopped\n")
+	case t1 > t2 && q1 == q2:
+		t.Errorf("time reversed\n")
+	case t1 < t2 && q1 != q2:
+		t.Errorf("clock sequence chaned unexpectedly\n")
+	}
+}
+
+func TestNodeAndTime(t *testing.T) {
+	// Time is February 5, 1998 12:30:23.136364800 AM GMT
+
+	uuid := Parse("7d444840-9dc0-11d1-b245-5ffdce74fad2")
+	node := []byte{0x5f, 0xfd, 0xce, 0x74, 0xfa, 0xd2}
+
+	ts, ok := uuid.Time()
+	if ok {
+		c := time.Unix(ts.UnixTime())
+		want := time.Date(1998, 2, 5, 0, 30, 23, 136364800, time.UTC)
+		if !c.Equal(want) {
+			t.Errorf("Got time %v, want %v", c, want)
+		}
+	} else {
+		t.Errorf("%s: bad time\n", uuid)
+	}
+	if !bytes.Equal(node, uuid.NodeID()) {
+		t.Errorf("Expected node %v got %v\n", node, uuid.NodeID())
+	}
+}
+
+func TestMD5(t *testing.T) {
+	uuid := NewMD5(NameSpace_DNS, []byte("python.org")).String()
+	want := "6fa459ea-ee8a-3ca4-894e-db77e160355e"
+	if uuid != want {
+		t.Errorf("MD5: got %q expected %q\n", uuid, want)
+	}
+}
+
+func TestSHA1(t *testing.T) {
+	uuid := NewSHA1(NameSpace_DNS, []byte("python.org")).String()
+	want := "886313e1-3b8a-5372-9b90-0c9aee199e5d"
+	if uuid != want {
+		t.Errorf("SHA1: got %q expected %q\n", uuid, want)
+	}
+}
+
+func TestNodeID(t *testing.T) {
+	nid := []byte{1, 2, 3, 4, 5, 6}
+	SetNodeInterface("")
+	s := NodeInterface()
+	if s == "" || s == "user" {
+		t.Errorf("NodeInterface %q after SetInteface\n", s)
+	}
+	node1 := NodeID()
+	if node1 == nil {
+		t.Errorf("NodeID nil after SetNodeInterface\n", s)
+	}
+	SetNodeID(nid)
+	s = NodeInterface()
+	if s != "user" {
+		t.Errorf("Expected NodeInterface %q got %q\n", "user", s)
+	}
+	node2 := NodeID()
+	if node2 == nil {
+		t.Errorf("NodeID nil after SetNodeID\n", s)
+	}
+	if bytes.Equal(node1, node2) {
+		t.Errorf("NodeID not changed after SetNodeID\n", s)
+	} else if !bytes.Equal(nid, node2) {
+		t.Errorf("NodeID is %x, expected %x\n", node2, nid)
+	}
+}
+
+func testDCE(t *testing.T, name string, uuid UUID, domain Domain, id uint32) {
+	if uuid == nil {
+		t.Errorf("%s failed\n", name)
+		return
+	}
+	if v, _ := uuid.Version(); v != 2 {
+		t.Errorf("%s: %s: expected version 2, got %s\n", name, uuid, v)
+		return
+	}
+	if v, ok := uuid.Domain(); !ok || v != domain {
+		if !ok {
+			t.Errorf("%s: %d: Domain failed\n", name, uuid)
+		} else {
+			t.Errorf("%s: %s: expected domain %d, got %d\n", name, uuid, domain, v)
+		}
+	}
+	if v, ok := uuid.Id(); !ok || v != id {
+		if !ok {
+			t.Errorf("%s: %d: Id failed\n", name, uuid)
+		} else {
+			t.Errorf("%s: %s: expected id %d, got %d\n", name, uuid, id, v)
+		}
+	}
+}
+
+func TestDCE(t *testing.T) {
+	testDCE(t, "NewDCESecurity", NewDCESecurity(42, 12345678), 42, 12345678)
+	testDCE(t, "NewDCEPerson", NewDCEPerson(), Person, uint32(os.Getuid()))
+	testDCE(t, "NewDCEGroup", NewDCEGroup(), Group, uint32(os.Getgid()))
+}
+
+type badRand struct{}
+
+func (r badRand) Read(buf []byte) (int, error) {
+	for i, _ := range buf {
+		buf[i] = byte(i)
+	}
+	return len(buf), nil
+}
+
+func TestBadRand(t *testing.T) {
+	SetRand(badRand{})
+	uuid1 := New()
+	uuid2 := New()
+	if uuid1 != uuid2 {
+		t.Errorf("execpted duplicates, got %q and %q\n", uuid1, uuid2)
+	}
+	SetRand(nil)
+	uuid1 = New()
+	uuid2 = New()
+	if uuid1 == uuid2 {
+		t.Errorf("unexecpted duplicates, got %q\n", uuid1)
+	}
+}

Godeps/_workspace/src/code.google.com/p/go-uuid/uuid/version1.go

@@ -0,0 +1,41 @@
+// Copyright 2011 Google Inc.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package uuid
+
+import (
+	"encoding/binary"
+)
+
+// NewUUID returns a Version 1 UUID based on the current NodeID and clock
+// sequence, and the current time.  If the NodeID has not been set by SetNodeID
+// or SetNodeInterface then it will be set automatically.  If the NodeID cannot
+// be set NewUUID returns nil.  If clock sequence has not been set by
+// SetClockSequence then it will be set automatically.  If GetTime fails to
+// return the current NewUUID returns nil.
+func NewUUID() UUID {
+	if nodeID == nil {
+		SetNodeInterface("")
+	}
+
+	now, err := GetTime()
+	if err != nil {
+		return nil
+	}
+
+	uuid := make([]byte, 16)
+
+	time_low := uint32(now & 0xffffffff)
+	time_mid := uint16((now >> 32) & 0xffff)
+	time_hi := uint16((now >> 48) & 0x0fff)
+	time_hi |= 0x1000 // Version 1
+
+	binary.BigEndian.PutUint32(uuid[0:], time_low)
+	binary.BigEndian.PutUint16(uuid[4:], time_mid)
+	binary.BigEndian.PutUint16(uuid[6:], time_hi)
+	binary.BigEndian.PutUint16(uuid[8:], clock_seq)
+	copy(uuid[10:], nodeID)
+
+	return uuid
+}

Godeps/_workspace/src/code.google.com/p/go-uuid/uuid/version4.go

@@ -0,0 +1,25 @@
+// Copyright 2011 Google Inc.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package uuid
+
+// Random returns a Random (Version 4) UUID or panics.
+//
+// The strength of the UUIDs is based on the strength of the crypto/rand
+// package.
+//
+// A note about uniqueness derived from from the UUID Wikipedia entry:
+//
+//  Randomly generated UUIDs have 122 random bits.  One's annual risk of being
+//  hit by a meteorite is estimated to be one chance in 17 billion, that
+//  means the probability is about 0.00000000006 (6 × 10−11),
+//  equivalent to the odds of creating a few tens of trillions of UUIDs in a
+//  year and having one duplicate.
+func NewRandom() UUID {
+	uuid := make([]byte, 16)
+	randomBits([]byte(uuid))
+	uuid[6] = (uuid[6] & 0x0f) | 0x40 // Version 4
+	uuid[8] = (uuid[8] & 0x3f) | 0x80 // Variant is 10
+	return uuid
+}

Godeps/_workspace/src/code.google.com/p/go.crypto/pbkdf2/pbkdf2.go

@@ -0,0 +1,77 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Package pbkdf2 implements the key derivation function PBKDF2 as defined in RFC
+2898 / PKCS #5 v2.0.
+
+A key derivation function is useful when encrypting data based on a password
+or any other not-fully-random data. It uses a pseudorandom function to derive
+a secure encryption key based on the password.
+
+While v2.0 of the standard defines only one pseudorandom function to use,
+HMAC-SHA1, the drafted v2.1 specification allows use of all five FIPS Approved
+Hash Functions SHA-1, SHA-224, SHA-256, SHA-384 and SHA-512 for HMAC. To
+choose, you can pass the `New` functions from the different SHA packages to
+pbkdf2.Key.
+*/
+package pbkdf2
+
+import (
+	"crypto/hmac"
+	"hash"
+)
+
+// Key derives a key from the password, salt and iteration count, returning a
+// []byte of length keylen that can be used as cryptographic key. The key is
+// derived based on the method described as PBKDF2 with the HMAC variant using
+// the supplied hash function.
+//
+// For example, to use a HMAC-SHA-1 based PBKDF2 key derivation function, you
+// can get a derived key for e.g. AES-256 (which needs a 32-byte key) by
+// doing:
+//
+// 	dk := pbkdf2.Key([]byte("some password"), salt, 4096, 32, sha1.New)
+//
+// Remember to get a good random salt. At least 8 bytes is recommended by the
+// RFC.
+//
+// Using a higher iteration count will increase the cost of an exhaustive
+// search but will also make derivation proportionally slower.
+func Key(password, salt []byte, iter, keyLen int, h func() hash.Hash) []byte {
+	prf := hmac.New(h, password)
+	hashLen := prf.Size()
+	numBlocks := (keyLen + hashLen - 1) / hashLen
+
+	var buf [4]byte
+	dk := make([]byte, 0, numBlocks*hashLen)
+	U := make([]byte, hashLen)
+	for block := 1; block <= numBlocks; block++ {
+		// N.B.: || means concatenation, ^ means XOR
+		// for each block T_i = U_1 ^ U_2 ^ ... ^ U_iter
+		// U_1 = PRF(password, salt || uint(i))
+		prf.Reset()
+		prf.Write(salt)
+		buf[0] = byte(block >> 24)
+		buf[1] = byte(block >> 16)
+		buf[2] = byte(block >> 8)
+		buf[3] = byte(block)
+		prf.Write(buf[:4])
+		dk = prf.Sum(dk)
+		T := dk[len(dk)-hashLen:]
+		copy(U, T)
+
+		// U_n = PRF(password, U_(n-1))
+		for n := 2; n <= iter; n++ {
+			prf.Reset()
+			prf.Write(U)
+			U = U[:0]
+			U = prf.Sum(U)
+			for x := range U {
+				T[x] ^= U[x]
+			}
+		}
+	}
+	return dk[:keyLen]
+}

Godeps/_workspace/src/code.google.com/p/go.crypto/pbkdf2/pbkdf2_test.go

@@ -0,0 +1,157 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package pbkdf2
+
+import (
+	"bytes"
+	"crypto/sha1"
+	"crypto/sha256"
+	"hash"
+	"testing"
+)
+
+type testVector struct {
+	password string
+	salt     string
+	iter     int
+	output   []byte
+}
+
+// Test vectors from RFC 6070, http://tools.ietf.org/html/rfc6070
+var sha1TestVectors = []testVector{
+	{
+		"password",
+		"salt",
+		1,
+		[]byte{
+			0x0c, 0x60, 0xc8, 0x0f, 0x96, 0x1f, 0x0e, 0x71,
+			0xf3, 0xa9, 0xb5, 0x24, 0xaf, 0x60, 0x12, 0x06,
+			0x2f, 0xe0, 0x37, 0xa6,
+		},
+	},
+	{
+		"password",
+		"salt",
+		2,
+		[]byte{
+			0xea, 0x6c, 0x01, 0x4d, 0xc7, 0x2d, 0x6f, 0x8c,
+			0xcd, 0x1e, 0xd9, 0x2a, 0xce, 0x1d, 0x41, 0xf0,
+			0xd8, 0xde, 0x89, 0x57,
+		},
+	},
+	{
+		"password",
+		"salt",
+		4096,
+		[]byte{
+			0x4b, 0x00, 0x79, 0x01, 0xb7, 0x65, 0x48, 0x9a,
+			0xbe, 0xad, 0x49, 0xd9, 0x26, 0xf7, 0x21, 0xd0,
+			0x65, 0xa4, 0x29, 0xc1,
+		},
+	},
+	// // This one takes too long
+	// {
+	// 	"password",
+	// 	"salt",
+	// 	16777216,
+	// 	[]byte{
+	// 		0xee, 0xfe, 0x3d, 0x61, 0xcd, 0x4d, 0xa4, 0xe4,
+	// 		0xe9, 0x94, 0x5b, 0x3d, 0x6b, 0xa2, 0x15, 0x8c,
+	// 		0x26, 0x34, 0xe9, 0x84,
+	// 	},
+	// },
+	{
+		"passwordPASSWORDpassword",
+		"saltSALTsaltSALTsaltSALTsaltSALTsalt",
+		4096,
+		[]byte{
+			0x3d, 0x2e, 0xec, 0x4f, 0xe4, 0x1c, 0x84, 0x9b,
+			0x80, 0xc8, 0xd8, 0x36, 0x62, 0xc0, 0xe4, 0x4a,
+			0x8b, 0x29, 0x1a, 0x96, 0x4c, 0xf2, 0xf0, 0x70,
+			0x38,
+		},
+	},
+	{
+		"pass\000word",
+		"sa\000lt",
+		4096,
+		[]byte{
+			0x56, 0xfa, 0x6a, 0xa7, 0x55, 0x48, 0x09, 0x9d,
+			0xcc, 0x37, 0xd7, 0xf0, 0x34, 0x25, 0xe0, 0xc3,
+		},
+	},
+}
+
+// Test vectors from
+// http://stackoverflow.com/questions/5130513/pbkdf2-hmac-sha2-test-vectors
+var sha256TestVectors = []testVector{
+	{
+		"password",
+		"salt",
+		1,
+		[]byte{
+			0x12, 0x0f, 0xb6, 0xcf, 0xfc, 0xf8, 0xb3, 0x2c,
+			0x43, 0xe7, 0x22, 0x52, 0x56, 0xc4, 0xf8, 0x37,
+			0xa8, 0x65, 0x48, 0xc9,
+		},
+	},
+	{
+		"password",
+		"salt",
+		2,
+		[]byte{
+			0xae, 0x4d, 0x0c, 0x95, 0xaf, 0x6b, 0x46, 0xd3,
+			0x2d, 0x0a, 0xdf, 0xf9, 0x28, 0xf0, 0x6d, 0xd0,
+			0x2a, 0x30, 0x3f, 0x8e,
+		},
+	},
+	{
+		"password",
+		"salt",
+		4096,
+		[]byte{
+			0xc5, 0xe4, 0x78, 0xd5, 0x92, 0x88, 0xc8, 0x41,
+			0xaa, 0x53, 0x0d, 0xb6, 0x84, 0x5c, 0x4c, 0x8d,
+			0x96, 0x28, 0x93, 0xa0,
+		},
+	},
+	{
+		"passwordPASSWORDpassword",
+		"saltSALTsaltSALTsaltSALTsaltSALTsalt",
+		4096,
+		[]byte{
+			0x34, 0x8c, 0x89, 0xdb, 0xcb, 0xd3, 0x2b, 0x2f,
+			0x32, 0xd8, 0x14, 0xb8, 0x11, 0x6e, 0x84, 0xcf,
+			0x2b, 0x17, 0x34, 0x7e, 0xbc, 0x18, 0x00, 0x18,
+			0x1c,
+		},
+	},
+	{
+		"pass\000word",
+		"sa\000lt",
+		4096,
+		[]byte{
+			0x89, 0xb6, 0x9d, 0x05, 0x16, 0xf8, 0x29, 0x89,
+			0x3c, 0x69, 0x62, 0x26, 0x65, 0x0a, 0x86, 0x87,
+		},
+	},
+}
+
+func testHash(t *testing.T, h func() hash.Hash, hashName string, vectors []testVector) {
+	for i, v := range vectors {
+		o := Key([]byte(v.password), []byte(v.salt), v.iter, len(v.output), h)
+		if !bytes.Equal(o, v.output) {
+			t.Errorf("%s %d: expected %x, got %x", hashName, i, v.output, o)
+		}
+	}
+}
+
+func TestWithHMACSHA1(t *testing.T) {
+	testHash(t, sha1.New, "SHA1", sha1TestVectors)
+}
+
+func TestWithHMACSHA256(t *testing.T) {
+	testHash(t, sha256.New, "SHA256", sha256TestVectors)
+}

Godeps/_workspace/src/code.google.com/p/go.crypto/ripemd160/ripemd160.go

@@ -0,0 +1,120 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package ripemd160 implements the RIPEMD-160 hash algorithm.
+package ripemd160
+
+// RIPEMD-160 is designed by by Hans Dobbertin, Antoon Bosselaers, and Bart
+// Preneel with specifications available at:
+// http://homes.esat.kuleuven.be/~cosicart/pdf/AB-9601/AB-9601.pdf.
+
+import (
+	"crypto"
+	"hash"
+)
+
+func init() {
+	crypto.RegisterHash(crypto.RIPEMD160, New)
+}
+
+// The size of the checksum in bytes.
+const Size = 20
+
+// The block size of the hash algorithm in bytes.
+const BlockSize = 64
+
+const (
+	_s0 = 0x67452301
+	_s1 = 0xefcdab89
+	_s2 = 0x98badcfe
+	_s3 = 0x10325476
+	_s4 = 0xc3d2e1f0
+)
+
+// digest represents the partial evaluation of a checksum.
+type digest struct {
+	s  [5]uint32       // running context
+	x  [BlockSize]byte // temporary buffer
+	nx int             // index into x
+	tc uint64          // total count of bytes processed
+}
+
+func (d *digest) Reset() {
+	d.s[0], d.s[1], d.s[2], d.s[3], d.s[4] = _s0, _s1, _s2, _s3, _s4
+	d.nx = 0
+	d.tc = 0
+}
+
+// New returns a new hash.Hash computing the checksum.
+func New() hash.Hash {
+	result := new(digest)
+	result.Reset()
+	return result
+}
+
+func (d *digest) Size() int { return Size }
+
+func (d *digest) BlockSize() int { return BlockSize }
+
+func (d *digest) Write(p []byte) (nn int, err error) {
+	nn = len(p)
+	d.tc += uint64(nn)
+	if d.nx > 0 {
+		n := len(p)
+		if n > BlockSize-d.nx {
+			n = BlockSize - d.nx
+		}
+		for i := 0; i < n; i++ {
+			d.x[d.nx+i] = p[i]
+		}
+		d.nx += n
+		if d.nx == BlockSize {
+			_Block(d, d.x[0:])
+			d.nx = 0
+		}
+		p = p[n:]
+	}
+	n := _Block(d, p)
+	p = p[n:]
+	if len(p) > 0 {
+		d.nx = copy(d.x[:], p)
+	}
+	return
+}
+
+func (d0 *digest) Sum(in []byte) []byte {
+	// Make a copy of d0 so that caller can keep writing and summing.
+	d := *d0
+
+	// Padding.  Add a 1 bit and 0 bits until 56 bytes mod 64.
+	tc := d.tc
+	var tmp [64]byte
+	tmp[0] = 0x80
+	if tc%64 < 56 {
+		d.Write(tmp[0 : 56-tc%64])
+	} else {
+		d.Write(tmp[0 : 64+56-tc%64])
+	}
+
+	// Length in bits.
+	tc <<= 3
+	for i := uint(0); i < 8; i++ {
+		tmp[i] = byte(tc >> (8 * i))
+	}
+	d.Write(tmp[0:8])
+
+	if d.nx != 0 {
+		panic("d.nx != 0")
+	}
+
+	var digest [Size]byte
+	for i, s := range d.s {
+		digest[i*4] = byte(s)
+		digest[i*4+1] = byte(s >> 8)
+		digest[i*4+2] = byte(s >> 16)
+		digest[i*4+3] = byte(s >> 24)
+	}
+
+	return append(in, digest[:]...)
+}

Godeps/_workspace/src/code.google.com/p/go.crypto/ripemd160/ripemd160_test.go

@@ -0,0 +1,64 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ripemd160
+
+// Test vectors are from:
+// http://homes.esat.kuleuven.be/~bosselae/ripemd160.html
+
+import (
+	"fmt"
+	"io"
+	"testing"
+)
+
+type mdTest struct {
+	out string
+	in  string
+}
+
+var vectors = [...]mdTest{
+	{"9c1185a5c5e9fc54612808977ee8f548b2258d31", ""},
+	{"0bdc9d2d256b3ee9daae347be6f4dc835a467ffe", "a"},
+	{"8eb208f7e05d987a9b044a8e98c6b087f15a0bfc", "abc"},
+	{"5d0689ef49d2fae572b881b123a85ffa21595f36", "message digest"},
+	{"f71c27109c692c1b56bbdceb5b9d2865b3708dbc", "abcdefghijklmnopqrstuvwxyz"},
+	{"12a053384a9c0c88e405a06c27dcf49ada62eb2b", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
+	{"b0e20b6e3116640286ed3a87a5713079b21f5189", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"},
+	{"9b752e45573d4b39f4dbd3323cab82bf63326bfb", "12345678901234567890123456789012345678901234567890123456789012345678901234567890"},
+}
+
+func TestVectors(t *testing.T) {
+	for i := 0; i < len(vectors); i++ {
+		tv := vectors[i]
+		md := New()
+		for j := 0; j < 3; j++ {
+			if j < 2 {
+				io.WriteString(md, tv.in)
+			} else {
+				io.WriteString(md, tv.in[0:len(tv.in)/2])
+				md.Sum(nil)
+				io.WriteString(md, tv.in[len(tv.in)/2:])
+			}
+			s := fmt.Sprintf("%x", md.Sum(nil))
+			if s != tv.out {
+				t.Fatalf("RIPEMD-160[%d](%s) = %s, expected %s", j, tv.in, s, tv.out)
+			}
+			md.Reset()
+		}
+	}
+}
+
+func TestMillionA(t *testing.T) {
+	md := New()
+	for i := 0; i < 100000; i++ {
+		io.WriteString(md, "aaaaaaaaaa")
+	}
+	out := "52783243c1697bdbe16d37f97f68f08325dc1528"
+	s := fmt.Sprintf("%x", md.Sum(nil))
+	if s != out {
+		t.Fatalf("RIPEMD-160 (1 million 'a') = %s, expected %s", s, out)
+	}
+	md.Reset()
+}

Godeps/_workspace/src/code.google.com/p/go.crypto/ripemd160/ripemd160block.go

@@ -0,0 +1,161 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// RIPEMD-160 block step.
+// In its own file so that a faster assembly or C version
+// can be substituted easily.
+
+package ripemd160
+
+// work buffer indices and roll amounts for one line
+var _n = [80]uint{
+	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
+	7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
+	3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
+	1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
+	4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13,
+}
+
+var _r = [80]uint{
+	11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
+	7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
+	11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
+	11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
+	9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6,
+}
+
+// same for the other parallel one
+var n_ = [80]uint{
+	5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
+	6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
+	15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
+	8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
+	12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11,
+}
+
+var r_ = [80]uint{
+	8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
+	9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
+	9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
+	15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
+	8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11,
+}
+
+func _Block(md *digest, p []byte) int {
+	n := 0
+	var x [16]uint32
+	var alpha, beta uint32
+	for len(p) >= BlockSize {
+		a, b, c, d, e := md.s[0], md.s[1], md.s[2], md.s[3], md.s[4]
+		aa, bb, cc, dd, ee := a, b, c, d, e
+		j := 0
+		for i := 0; i < 16; i++ {
+			x[i] = uint32(p[j]) | uint32(p[j+1])<<8 | uint32(p[j+2])<<16 | uint32(p[j+3])<<24
+			j += 4
+		}
+
+		// round 1
+		i := 0
+		for i < 16 {
+			alpha = a + (b ^ c ^ d) + x[_n[i]]
+			s := _r[i]
+			alpha = (alpha<<s | alpha>>(32-s)) + e
+			beta = c<<10 | c>>22
+			a, b, c, d, e = e, alpha, b, beta, d
+
+			// parallel line
+			alpha = aa + (bb ^ (cc | ^dd)) + x[n_[i]] + 0x50a28be6
+			s = r_[i]
+			alpha = (alpha<<s | alpha>>(32-s)) + ee
+			beta = cc<<10 | cc>>22
+			aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
+
+			i++
+		}
+
+		// round 2
+		for i < 32 {
+			alpha = a + (b&c | ^b&d) + x[_n[i]] + 0x5a827999
+			s := _r[i]
+			alpha = (alpha<<s | alpha>>(32-s)) + e
+			beta = c<<10 | c>>22
+			a, b, c, d, e = e, alpha, b, beta, d
+
+			// parallel line
+			alpha = aa + (bb&dd | cc&^dd) + x[n_[i]] + 0x5c4dd124
+			s = r_[i]
+			alpha = (alpha<<s | alpha>>(32-s)) + ee
+			beta = cc<<10 | cc>>22
+			aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
+
+			i++
+		}
+
+		// round 3
+		for i < 48 {
+			alpha = a + (b | ^c ^ d) + x[_n[i]] + 0x6ed9eba1
+			s := _r[i]
+			alpha = (alpha<<s | alpha>>(32-s)) + e
+			beta = c<<10 | c>>22
+			a, b, c, d, e = e, alpha, b, beta, d
+
+			// parallel line
+			alpha = aa + (bb | ^cc ^ dd) + x[n_[i]] + 0x6d703ef3
+			s = r_[i]
+			alpha = (alpha<<s | alpha>>(32-s)) + ee
+			beta = cc<<10 | cc>>22
+			aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
+
+			i++
+		}
+
+		// round 4
+		for i < 64 {
+			alpha = a + (b&d | c&^d) + x[_n[i]] + 0x8f1bbcdc
+			s := _r[i]
+			alpha = (alpha<<s | alpha>>(32-s)) + e
+			beta = c<<10 | c>>22
+			a, b, c, d, e = e, alpha, b, beta, d
+
+			// parallel line
+			alpha = aa + (bb&cc | ^bb&dd) + x[n_[i]] + 0x7a6d76e9
+			s = r_[i]
+			alpha = (alpha<<s | alpha>>(32-s)) + ee
+			beta = cc<<10 | cc>>22
+			aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
+
+			i++
+		}
+
+		// round 5
+		for i < 80 {
+			alpha = a + (b ^ (c | ^d)) + x[_n[i]] + 0xa953fd4e
+			s := _r[i]
+			alpha = (alpha<<s | alpha>>(32-s)) + e
+			beta = c<<10 | c>>22
+			a, b, c, d, e = e, alpha, b, beta, d
+
+			// parallel line
+			alpha = aa + (bb ^ cc ^ dd) + x[n_[i]]
+			s = r_[i]
+			alpha = (alpha<<s | alpha>>(32-s)) + ee
+			beta = cc<<10 | cc>>22
+			aa, bb, cc, dd, ee = ee, alpha, bb, beta, dd
+
+			i++
+		}
+
+		// combine results
+		dd += c + md.s[1]
+		md.s[1] = md.s[2] + d + ee
+		md.s[2] = md.s[3] + e + aa
+		md.s[3] = md.s[4] + a + bb
+		md.s[4] = md.s[0] + b + cc
+		md.s[0] = dd
+
+		p = p[BlockSize:]
+		n += BlockSize
+	}
+	return n
+}

Godeps/_workspace/src/code.google.com/p/go.crypto/scrypt/scrypt.go

@@ -0,0 +1,243 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package scrypt implements the scrypt key derivation function as defined in
+// Colin Percival's paper "Stronger Key Derivation via Sequential Memory-Hard
+// Functions" (http://www.tarsnap.com/scrypt/scrypt.pdf).
+package scrypt
+
+import (
+	"crypto/sha256"
+	"errors"
+
+	"golang.org/x/crypto/pbkdf2"
+)
+
+const maxInt = int(^uint(0) >> 1)
+
+// blockCopy copies n numbers from src into dst.
+func blockCopy(dst, src []uint32, n int) {
+	copy(dst, src[:n])
+}
+
+// blockXOR XORs numbers from dst with n numbers from src.
+func blockXOR(dst, src []uint32, n int) {
+	for i, v := range src[:n] {
+		dst[i] ^= v
+	}
+}
+
+// salsaXOR applies Salsa20/8 to the XOR of 16 numbers from tmp and in,
+// and puts the result into both both tmp and out.
+func salsaXOR(tmp *[16]uint32, in, out []uint32) {
+	w0 := tmp[0] ^ in[0]
+	w1 := tmp[1] ^ in[1]
+	w2 := tmp[2] ^ in[2]
+	w3 := tmp[3] ^ in[3]
+	w4 := tmp[4] ^ in[4]
+	w5 := tmp[5] ^ in[5]
+	w6 := tmp[6] ^ in[6]
+	w7 := tmp[7] ^ in[7]
+	w8 := tmp[8] ^ in[8]
+	w9 := tmp[9] ^ in[9]
+	w10 := tmp[10] ^ in[10]
+	w11 := tmp[11] ^ in[11]
+	w12 := tmp[12] ^ in[12]
+	w13 := tmp[13] ^ in[13]
+	w14 := tmp[14] ^ in[14]
+	w15 := tmp[15] ^ in[15]
+
+	x0, x1, x2, x3, x4, x5, x6, x7, x8 := w0, w1, w2, w3, w4, w5, w6, w7, w8
+	x9, x10, x11, x12, x13, x14, x15 := w9, w10, w11, w12, w13, w14, w15
+
+	for i := 0; i < 8; i += 2 {
+		u := x0 + x12
+		x4 ^= u<<7 | u>>(32-7)
+		u = x4 + x0
+		x8 ^= u<<9 | u>>(32-9)
+		u = x8 + x4
+		x12 ^= u<<13 | u>>(32-13)
+		u = x12 + x8
+		x0 ^= u<<18 | u>>(32-18)
+
+		u = x5 + x1
+		x9 ^= u<<7 | u>>(32-7)
+		u = x9 + x5
+		x13 ^= u<<9 | u>>(32-9)
+		u = x13 + x9
+		x1 ^= u<<13 | u>>(32-13)
+		u = x1 + x13
+		x5 ^= u<<18 | u>>(32-18)
+
+		u = x10 + x6
+		x14 ^= u<<7 | u>>(32-7)
+		u = x14 + x10
+		x2 ^= u<<9 | u>>(32-9)
+		u = x2 + x14
+		x6 ^= u<<13 | u>>(32-13)
+		u = x6 + x2
+		x10 ^= u<<18 | u>>(32-18)
+
+		u = x15 + x11
+		x3 ^= u<<7 | u>>(32-7)
+		u = x3 + x15
+		x7 ^= u<<9 | u>>(32-9)
+		u = x7 + x3
+		x11 ^= u<<13 | u>>(32-13)
+		u = x11 + x7
+		x15 ^= u<<18 | u>>(32-18)
+
+		u = x0 + x3
+		x1 ^= u<<7 | u>>(32-7)
+		u = x1 + x0
+		x2 ^= u<<9 | u>>(32-9)
+		u = x2 + x1
+		x3 ^= u<<13 | u>>(32-13)
+		u = x3 + x2
+		x0 ^= u<<18 | u>>(32-18)
+
+		u = x5 + x4
+		x6 ^= u<<7 | u>>(32-7)
+		u = x6 + x5
+		x7 ^= u<<9 | u>>(32-9)
+		u = x7 + x6
+		x4 ^= u<<13 | u>>(32-13)
+		u = x4 + x7
+		x5 ^= u<<18 | u>>(32-18)
+
+		u = x10 + x9
+		x11 ^= u<<7 | u>>(32-7)
+		u = x11 + x10
+		x8 ^= u<<9 | u>>(32-9)
+		u = x8 + x11
+		x9 ^= u<<13 | u>>(32-13)
+		u = x9 + x8
+		x10 ^= u<<18 | u>>(32-18)
+
+		u = x15 + x14
+		x12 ^= u<<7 | u>>(32-7)
+		u = x12 + x15
+		x13 ^= u<<9 | u>>(32-9)
+		u = x13 + x12
+		x14 ^= u<<13 | u>>(32-13)
+		u = x14 + x13
+		x15 ^= u<<18 | u>>(32-18)
+	}
+	x0 += w0
+	x1 += w1
+	x2 += w2
+	x3 += w3
+	x4 += w4
+	x5 += w5
+	x6 += w6
+	x7 += w7
+	x8 += w8
+	x9 += w9
+	x10 += w10
+	x11 += w11
+	x12 += w12
+	x13 += w13
+	x14 += w14
+	x15 += w15
+
+	out[0], tmp[0] = x0, x0
+	out[1], tmp[1] = x1, x1
+	out[2], tmp[2] = x2, x2
+	out[3], tmp[3] = x3, x3
+	out[4], tmp[4] = x4, x4
+	out[5], tmp[5] = x5, x5
+	out[6], tmp[6] = x6, x6
+	out[7], tmp[7] = x7, x7
+	out[8], tmp[8] = x8, x8
+	out[9], tmp[9] = x9, x9
+	out[10], tmp[10] = x10, x10
+	out[11], tmp[11] = x11, x11
+	out[12], tmp[12] = x12, x12
+	out[13], tmp[13] = x13, x13
+	out[14], tmp[14] = x14, x14
+	out[15], tmp[15] = x15, x15
+}
+
+func blockMix(tmp *[16]uint32, in, out []uint32, r int) {
+	blockCopy(tmp[:], in[(2*r-1)*16:], 16)
+	for i := 0; i < 2*r; i += 2 {
+		salsaXOR(tmp, in[i*16:], out[i*8:])
+		salsaXOR(tmp, in[i*16+16:], out[i*8+r*16:])
+	}
+}
+
+func integer(b []uint32, r int) uint64 {
+	j := (2*r - 1) * 16
+	return uint64(b[j]) | uint64(b[j+1])<<32
+}
+
+func smix(b []byte, r, N int, v, xy []uint32) {
+	var tmp [16]uint32
+	x := xy
+	y := xy[32*r:]
+
+	j := 0
+	for i := 0; i < 32*r; i++ {
+		x[i] = uint32(b[j]) | uint32(b[j+1])<<8 | uint32(b[j+2])<<16 | uint32(b[j+3])<<24
+		j += 4
+	}
+	for i := 0; i < N; i += 2 {
+		blockCopy(v[i*(32*r):], x, 32*r)
+		blockMix(&tmp, x, y, r)
+
+		blockCopy(v[(i+1)*(32*r):], y, 32*r)
+		blockMix(&tmp, y, x, r)
+	}
+	for i := 0; i < N; i += 2 {
+		j := int(integer(x, r) & uint64(N-1))
+		blockXOR(x, v[j*(32*r):], 32*r)
+		blockMix(&tmp, x, y, r)
+
+		j = int(integer(y, r) & uint64(N-1))
+		blockXOR(y, v[j*(32*r):], 32*r)
+		blockMix(&tmp, y, x, r)
+	}
+	j = 0
+	for _, v := range x[:32*r] {
+		b[j+0] = byte(v >> 0)
+		b[j+1] = byte(v >> 8)
+		b[j+2] = byte(v >> 16)
+		b[j+3] = byte(v >> 24)
+		j += 4
+	}
+}
+
+// Key derives a key from the password, salt, and cost parameters, returning
+// a byte slice of length keyLen that can be used as cryptographic key.
+//
+// N is a CPU/memory cost parameter, which must be a power of two greater than 1.
+// r and p must satisfy r * p < 2³⁰. If the parameters do not satisfy the
+// limits, the function returns a nil byte slice and an error.
+//
+// For example, you can get a derived key for e.g. AES-256 (which needs a
+// 32-byte key) by doing:
+//
+//      dk := scrypt.Key([]byte("some password"), salt, 16384, 8, 1, 32)
+//
+// The recommended parameters for interactive logins as of 2009 are N=16384,
+// r=8, p=1. They should be increased as memory latency and CPU parallelism
+// increases. Remember to get a good random salt.
+func Key(password, salt []byte, N, r, p, keyLen int) ([]byte, error) {
+	if N <= 1 || N&(N-1) != 0 {
+		return nil, errors.New("scrypt: N must be > 1 and a power of 2")
+	}
+	if uint64(r)*uint64(p) >= 1<<30 || r > maxInt/128/p || r > maxInt/256 || N > maxInt/128/r {
+		return nil, errors.New("scrypt: parameters are too large")
+	}
+
+	xy := make([]uint32, 64*r)
+	v := make([]uint32, 32*N*r)
+	b := pbkdf2.Key(password, salt, 1, p*128*r, sha256.New)
+
+	for i := 0; i < p; i++ {
+		smix(b[i*128*r:], r, N, v, xy)
+	}
+
+	return pbkdf2.Key(password, b, 1, keyLen, sha256.New), nil
+}

Godeps/_workspace/src/code.google.com/p/go.crypto/scrypt/scrypt_test.go

@@ -0,0 +1,160 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package scrypt
+
+import (
+	"bytes"
+	"testing"
+)
+
+type testVector struct {
+	password string
+	salt     string
+	N, r, p  int
+	output   []byte
+}
+
+var good = []testVector{
+	{
+		"password",
+		"salt",
+		2, 10, 10,
+		[]byte{
+			0x48, 0x2c, 0x85, 0x8e, 0x22, 0x90, 0x55, 0xe6, 0x2f,
+			0x41, 0xe0, 0xec, 0x81, 0x9a, 0x5e, 0xe1, 0x8b, 0xdb,
+			0x87, 0x25, 0x1a, 0x53, 0x4f, 0x75, 0xac, 0xd9, 0x5a,
+			0xc5, 0xe5, 0xa, 0xa1, 0x5f,
+		},
+	},
+	{
+		"password",
+		"salt",
+		16, 100, 100,
+		[]byte{
+			0x88, 0xbd, 0x5e, 0xdb, 0x52, 0xd1, 0xdd, 0x0, 0x18,
+			0x87, 0x72, 0xad, 0x36, 0x17, 0x12, 0x90, 0x22, 0x4e,
+			0x74, 0x82, 0x95, 0x25, 0xb1, 0x8d, 0x73, 0x23, 0xa5,
+			0x7f, 0x91, 0x96, 0x3c, 0x37,
+		},
+	},
+	{
+		"this is a long \000 password",
+		"and this is a long \000 salt",
+		16384, 8, 1,
+		[]byte{
+			0xc3, 0xf1, 0x82, 0xee, 0x2d, 0xec, 0x84, 0x6e, 0x70,
+			0xa6, 0x94, 0x2f, 0xb5, 0x29, 0x98, 0x5a, 0x3a, 0x09,
+			0x76, 0x5e, 0xf0, 0x4c, 0x61, 0x29, 0x23, 0xb1, 0x7f,
+			0x18, 0x55, 0x5a, 0x37, 0x07, 0x6d, 0xeb, 0x2b, 0x98,
+			0x30, 0xd6, 0x9d, 0xe5, 0x49, 0x26, 0x51, 0xe4, 0x50,
+			0x6a, 0xe5, 0x77, 0x6d, 0x96, 0xd4, 0x0f, 0x67, 0xaa,
+			0xee, 0x37, 0xe1, 0x77, 0x7b, 0x8a, 0xd5, 0xc3, 0x11,
+			0x14, 0x32, 0xbb, 0x3b, 0x6f, 0x7e, 0x12, 0x64, 0x40,
+			0x18, 0x79, 0xe6, 0x41, 0xae,
+		},
+	},
+	{
+		"p",
+		"s",
+		2, 1, 1,
+		[]byte{
+			0x48, 0xb0, 0xd2, 0xa8, 0xa3, 0x27, 0x26, 0x11, 0x98,
+			0x4c, 0x50, 0xeb, 0xd6, 0x30, 0xaf, 0x52,
+		},
+	},
+
+	{
+		"",
+		"",
+		16, 1, 1,
+		[]byte{
+			0x77, 0xd6, 0x57, 0x62, 0x38, 0x65, 0x7b, 0x20, 0x3b,
+			0x19, 0xca, 0x42, 0xc1, 0x8a, 0x04, 0x97, 0xf1, 0x6b,
+			0x48, 0x44, 0xe3, 0x07, 0x4a, 0xe8, 0xdf, 0xdf, 0xfa,
+			0x3f, 0xed, 0xe2, 0x14, 0x42, 0xfc, 0xd0, 0x06, 0x9d,
+			0xed, 0x09, 0x48, 0xf8, 0x32, 0x6a, 0x75, 0x3a, 0x0f,
+			0xc8, 0x1f, 0x17, 0xe8, 0xd3, 0xe0, 0xfb, 0x2e, 0x0d,
+			0x36, 0x28, 0xcf, 0x35, 0xe2, 0x0c, 0x38, 0xd1, 0x89,
+			0x06,
+		},
+	},
+	{
+		"password",
+		"NaCl",
+		1024, 8, 16,
+		[]byte{
+			0xfd, 0xba, 0xbe, 0x1c, 0x9d, 0x34, 0x72, 0x00, 0x78,
+			0x56, 0xe7, 0x19, 0x0d, 0x01, 0xe9, 0xfe, 0x7c, 0x6a,
+			0xd7, 0xcb, 0xc8, 0x23, 0x78, 0x30, 0xe7, 0x73, 0x76,
+			0x63, 0x4b, 0x37, 0x31, 0x62, 0x2e, 0xaf, 0x30, 0xd9,
+			0x2e, 0x22, 0xa3, 0x88, 0x6f, 0xf1, 0x09, 0x27, 0x9d,
+			0x98, 0x30, 0xda, 0xc7, 0x27, 0xaf, 0xb9, 0x4a, 0x83,
+			0xee, 0x6d, 0x83, 0x60, 0xcb, 0xdf, 0xa2, 0xcc, 0x06,
+			0x40,
+		},
+	},
+	{
+		"pleaseletmein", "SodiumChloride",
+		16384, 8, 1,
+		[]byte{
+			0x70, 0x23, 0xbd, 0xcb, 0x3a, 0xfd, 0x73, 0x48, 0x46,
+			0x1c, 0x06, 0xcd, 0x81, 0xfd, 0x38, 0xeb, 0xfd, 0xa8,
+			0xfb, 0xba, 0x90, 0x4f, 0x8e, 0x3e, 0xa9, 0xb5, 0x43,
+			0xf6, 0x54, 0x5d, 0xa1, 0xf2, 0xd5, 0x43, 0x29, 0x55,
+			0x61, 0x3f, 0x0f, 0xcf, 0x62, 0xd4, 0x97, 0x05, 0x24,
+			0x2a, 0x9a, 0xf9, 0xe6, 0x1e, 0x85, 0xdc, 0x0d, 0x65,
+			0x1e, 0x40, 0xdf, 0xcf, 0x01, 0x7b, 0x45, 0x57, 0x58,
+			0x87,
+		},
+	},
+	/*
+		// Disabled: needs 1 GiB RAM and takes too long for a simple test.
+		{
+			"pleaseletmein", "SodiumChloride",
+			1048576, 8, 1,
+			[]byte{
+				0x21, 0x01, 0xcb, 0x9b, 0x6a, 0x51, 0x1a, 0xae, 0xad,
+				0xdb, 0xbe, 0x09, 0xcf, 0x70, 0xf8, 0x81, 0xec, 0x56,
+				0x8d, 0x57, 0x4a, 0x2f, 0xfd, 0x4d, 0xab, 0xe5, 0xee,
+				0x98, 0x20, 0xad, 0xaa, 0x47, 0x8e, 0x56, 0xfd, 0x8f,
+				0x4b, 0xa5, 0xd0, 0x9f, 0xfa, 0x1c, 0x6d, 0x92, 0x7c,
+				0x40, 0xf4, 0xc3, 0x37, 0x30, 0x40, 0x49, 0xe8, 0xa9,
+				0x52, 0xfb, 0xcb, 0xf4, 0x5c, 0x6f, 0xa7, 0x7a, 0x41,
+				0xa4,
+			},
+		},
+	*/
+}
+
+var bad = []testVector{
+	{"p", "s", 0, 1, 1, nil},                    // N == 0
+	{"p", "s", 1, 1, 1, nil},                    // N == 1
+	{"p", "s", 7, 8, 1, nil},                    // N is not power of 2
+	{"p", "s", 16, maxInt / 2, maxInt / 2, nil}, // p * r too large
+}
+
+func TestKey(t *testing.T) {
+	for i, v := range good {
+		k, err := Key([]byte(v.password), []byte(v.salt), v.N, v.r, v.p, len(v.output))
+		if err != nil {
+			t.Errorf("%d: got unexpected error: %s", i, err)
+		}
+		if !bytes.Equal(k, v.output) {
+			t.Errorf("%d: expected %x, got %x", i, v.output, k)
+		}
+	}
+	for i, v := range bad {
+		_, err := Key([]byte(v.password), []byte(v.salt), v.N, v.r, v.p, 32)
+		if err == nil {
+			t.Errorf("%d: expected error, got nil", i)
+		}
+	}
+}
+
+func BenchmarkKey(b *testing.B) {
+	for i := 0; i < b.N; i++ {
+		Key([]byte("password"), []byte("salt"), 16384, 8, 1, 64)
+	}
+}

Godeps/_workspace/src/code.google.com/p/go.net/websocket/client.go

@@ -0,0 +1,98 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package websocket
+
+import (
+	"bufio"
+	"crypto/tls"
+	"io"
+	"net"
+	"net/http"
+	"net/url"
+)
+
+// DialError is an error that occurs while dialling a websocket server.
+type DialError struct {
+	*Config
+	Err error
+}
+
+func (e *DialError) Error() string {
+	return "websocket.Dial " + e.Config.Location.String() + ": " + e.Err.Error()
+}
+
+// NewConfig creates a new WebSocket config for client connection.
+func NewConfig(server, origin string) (config *Config, err error) {
+	config = new(Config)
+	config.Version = ProtocolVersionHybi13
+	config.Location, err = url.ParseRequestURI(server)
+	if err != nil {
+		return
+	}
+	config.Origin, err = url.ParseRequestURI(origin)
+	if err != nil {
+		return
+	}
+	config.Header = http.Header(make(map[string][]string))
+	return
+}
+
+// NewClient creates a new WebSocket client connection over rwc.
+func NewClient(config *Config, rwc io.ReadWriteCloser) (ws *Conn, err error) {
+	br := bufio.NewReader(rwc)
+	bw := bufio.NewWriter(rwc)
+	err = hybiClientHandshake(config, br, bw)
+	if err != nil {
+		return
+	}
+	buf := bufio.NewReadWriter(br, bw)
+	ws = newHybiClientConn(config, buf, rwc)
+	return
+}
+
+// Dial opens a new client connection to a WebSocket.
+func Dial(url_, protocol, origin string) (ws *Conn, err error) {
+	config, err := NewConfig(url_, origin)
+	if err != nil {
+		return nil, err
+	}
+	if protocol != "" {
+		config.Protocol = []string{protocol}
+	}
+	return DialConfig(config)
+}
+
+// DialConfig opens a new client connection to a WebSocket with a config.
+func DialConfig(config *Config) (ws *Conn, err error) {
+	var client net.Conn
+	if config.Location == nil {
+		return nil, &DialError{config, ErrBadWebSocketLocation}
+	}
+	if config.Origin == nil {
+		return nil, &DialError{config, ErrBadWebSocketOrigin}
+	}
+	switch config.Location.Scheme {
+	case "ws":
+		client, err = net.Dial("tcp", config.Location.Host)
+
+	case "wss":
+		client, err = tls.Dial("tcp", config.Location.Host, config.TlsConfig)
+
+	default:
+		err = ErrBadScheme
+	}
+	if err != nil {
+		goto Error
+	}
+
+	ws, err = NewClient(config, client)
+	if err != nil {
+		goto Error
+	}
+	return
+
+Error:
+	return nil, &DialError{config, err}
+}

Godeps/_workspace/src/code.google.com/p/go.net/websocket/exampledial_test.go

@@ -0,0 +1,31 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package websocket_test
+
+import (
+	"fmt"
+	"log"
+
+	"code.google.com/p/go.net/websocket"
+)
+
+// This example demonstrates a trivial client.
+func ExampleDial() {
+	origin := "http://localhost/"
+	url := "ws://localhost:12345/ws"
+	ws, err := websocket.Dial(url, "", origin)
+	if err != nil {
+		log.Fatal(err)
+	}
+	if _, err := ws.Write([]byte("hello, world!\n")); err != nil {
+		log.Fatal(err)
+	}
+	var msg = make([]byte, 512)
+	var n int
+	if n, err = ws.Read(msg); err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("Received: %s.\n", msg[:n])
+}

Godeps/_workspace/src/code.google.com/p/go.net/websocket/examplehandler_test.go

@@ -0,0 +1,26 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package websocket_test
+
+import (
+	"io"
+	"net/http"
+
+	"code.google.com/p/go.net/websocket"
+)
+
+// Echo the data received on the WebSocket.
+func EchoServer(ws *websocket.Conn) {
+	io.Copy(ws, ws)
+}
+
+// This example demonstrates a trivial echo server.
+func ExampleHandler() {
+	http.Handle("/echo", websocket.Handler(EchoServer))
+	err := http.ListenAndServe(":12345", nil)
+	if err != nil {
+		panic("ListenAndServe: " + err.Error())
+	}
+}

Godeps/_workspace/src/code.google.com/p/go.net/websocket/hybi.go

@@ -0,0 +1,564 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package websocket
+
+// This file implements a protocol of hybi draft.
+// http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-17
+
+import (
+	"bufio"
+	"bytes"
+	"crypto/rand"
+	"crypto/sha1"
+	"encoding/base64"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"strings"
+)
+
+const (
+	websocketGUID = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
+
+	closeStatusNormal            = 1000
+	closeStatusGoingAway         = 1001
+	closeStatusProtocolError     = 1002
+	closeStatusUnsupportedData   = 1003
+	closeStatusFrameTooLarge     = 1004
+	closeStatusNoStatusRcvd      = 1005
+	closeStatusAbnormalClosure   = 1006
+	closeStatusBadMessageData    = 1007
+	closeStatusPolicyViolation   = 1008
+	closeStatusTooBigData        = 1009
+	closeStatusExtensionMismatch = 1010
+
+	maxControlFramePayloadLength = 125
+)
+
+var (
+	ErrBadMaskingKey         = &ProtocolError{"bad masking key"}
+	ErrBadPongMessage        = &ProtocolError{"bad pong message"}
+	ErrBadClosingStatus      = &ProtocolError{"bad closing status"}
+	ErrUnsupportedExtensions = &ProtocolError{"unsupported extensions"}
+	ErrNotImplemented        = &ProtocolError{"not implemented"}
+
+	handshakeHeader = map[string]bool{
+		"Host":                   true,
+		"Upgrade":                true,
+		"Connection":             true,
+		"Sec-Websocket-Key":      true,
+		"Sec-Websocket-Origin":   true,
+		"Sec-Websocket-Version":  true,
+		"Sec-Websocket-Protocol": true,
+		"Sec-Websocket-Accept":   true,
+	}
+)
+
+// A hybiFrameHeader is a frame header as defined in hybi draft.
+type hybiFrameHeader struct {
+	Fin        bool
+	Rsv        [3]bool
+	OpCode     byte
+	Length     int64
+	MaskingKey []byte
+
+	data *bytes.Buffer
+}
+
+// A hybiFrameReader is a reader for hybi frame.
+type hybiFrameReader struct {
+	reader io.Reader
+
+	header hybiFrameHeader
+	pos    int64
+	length int
+}
+
+func (frame *hybiFrameReader) Read(msg []byte) (n int, err error) {
+	n, err = frame.reader.Read(msg)
+	if err != nil {
+		return 0, err
+	}
+	if frame.header.MaskingKey != nil {
+		for i := 0; i < n; i++ {
+			msg[i] = msg[i] ^ frame.header.MaskingKey[frame.pos%4]
+			frame.pos++
+		}
+	}
+	return n, err
+}
+
+func (frame *hybiFrameReader) PayloadType() byte { return frame.header.OpCode }
+
+func (frame *hybiFrameReader) HeaderReader() io.Reader {
+	if frame.header.data == nil {
+		return nil
+	}
+	if frame.header.data.Len() == 0 {
+		return nil
+	}
+	return frame.header.data
+}
+
+func (frame *hybiFrameReader) TrailerReader() io.Reader { return nil }
+
+func (frame *hybiFrameReader) Len() (n int) { return frame.length }
+
+// A hybiFrameReaderFactory creates new frame reader based on its frame type.
+type hybiFrameReaderFactory struct {
+	*bufio.Reader
+}
+
+// NewFrameReader reads a frame header from the connection, and creates new reader for the frame.
+// See Section 5.2 Base Framing protocol for detail.
+// http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-17#section-5.2
+func (buf hybiFrameReaderFactory) NewFrameReader() (frame frameReader, err error) {
+	hybiFrame := new(hybiFrameReader)
+	frame = hybiFrame
+	var header []byte
+	var b byte
+	// First byte. FIN/RSV1/RSV2/RSV3/OpCode(4bits)
+	b, err = buf.ReadByte()
+	if err != nil {
+		return
+	}
+	header = append(header, b)
+	hybiFrame.header.Fin = ((header[0] >> 7) & 1) != 0
+	for i := 0; i < 3; i++ {
+		j := uint(6 - i)
+		hybiFrame.header.Rsv[i] = ((header[0] >> j) & 1) != 0
+	}
+	hybiFrame.header.OpCode = header[0] & 0x0f
+
+	// Second byte. Mask/Payload len(7bits)
+	b, err = buf.ReadByte()
+	if err != nil {
+		return
+	}
+	header = append(header, b)
+	mask := (b & 0x80) != 0
+	b &= 0x7f
+	lengthFields := 0
+	switch {
+	case b <= 125: // Payload length 7bits.
+		hybiFrame.header.Length = int64(b)
+	case b == 126: // Payload length 7+16bits
+		lengthFields = 2
+	case b == 127: // Payload length 7+64bits
+		lengthFields = 8
+	}
+	for i := 0; i < lengthFields; i++ {
+		b, err = buf.ReadByte()
+		if err != nil {
+			return
+		}
+		header = append(header, b)
+		hybiFrame.header.Length = hybiFrame.header.Length*256 + int64(b)
+	}
+	if mask {
+		// Masking key. 4 bytes.
+		for i := 0; i < 4; i++ {
+			b, err = buf.ReadByte()
+			if err != nil {
+				return
+			}
+			header = append(header, b)
+			hybiFrame.header.MaskingKey = append(hybiFrame.header.MaskingKey, b)
+		}
+	}
+	hybiFrame.reader = io.LimitReader(buf.Reader, hybiFrame.header.Length)
+	hybiFrame.header.data = bytes.NewBuffer(header)
+	hybiFrame.length = len(header) + int(hybiFrame.header.Length)
+	return
+}
+
+// A HybiFrameWriter is a writer for hybi frame.
+type hybiFrameWriter struct {
+	writer *bufio.Writer
+
+	header *hybiFrameHeader
+}
+
+func (frame *hybiFrameWriter) Write(msg []byte) (n int, err error) {
+	var header []byte
+	var b byte
+	if frame.header.Fin {
+		b |= 0x80
+	}
+	for i := 0; i < 3; i++ {
+		if frame.header.Rsv[i] {
+			j := uint(6 - i)
+			b |= 1 << j
+		}
+	}
+	b |= frame.header.OpCode
+	header = append(header, b)
+	if frame.header.MaskingKey != nil {
+		b = 0x80
+	} else {
+		b = 0
+	}
+	lengthFields := 0
+	length := len(msg)
+	switch {
+	case length <= 125:
+		b |= byte(length)
+	case length < 65536:
+		b |= 126
+		lengthFields = 2
+	default:
+		b |= 127
+		lengthFields = 8
+	}
+	header = append(header, b)
+	for i := 0; i < lengthFields; i++ {
+		j := uint((lengthFields - i - 1) * 8)
+		b = byte((length >> j) & 0xff)
+		header = append(header, b)
+	}
+	if frame.header.MaskingKey != nil {
+		if len(frame.header.MaskingKey) != 4 {
+			return 0, ErrBadMaskingKey
+		}
+		header = append(header, frame.header.MaskingKey...)
+		frame.writer.Write(header)
+		data := make([]byte, length)
+		for i := range data {
+			data[i] = msg[i] ^ frame.header.MaskingKey[i%4]
+		}
+		frame.writer.Write(data)
+		err = frame.writer.Flush()
+		return length, err
+	}
+	frame.writer.Write(header)
+	frame.writer.Write(msg)
+	err = frame.writer.Flush()
+	return length, err
+}
+
+func (frame *hybiFrameWriter) Close() error { return nil }
+
+type hybiFrameWriterFactory struct {
+	*bufio.Writer
+	needMaskingKey bool
+}
+
+func (buf hybiFrameWriterFactory) NewFrameWriter(payloadType byte) (frame frameWriter, err error) {
+	frameHeader := &hybiFrameHeader{Fin: true, OpCode: payloadType}
+	if buf.needMaskingKey {
+		frameHeader.MaskingKey, err = generateMaskingKey()
+		if err != nil {
+			return nil, err
+		}
+	}
+	return &hybiFrameWriter{writer: buf.Writer, header: frameHeader}, nil
+}
+
+type hybiFrameHandler struct {
+	conn        *Conn
+	payloadType byte
+}
+
+func (handler *hybiFrameHandler) HandleFrame(frame frameReader) (r frameReader, err error) {
+	if handler.conn.IsServerConn() {
+		// The client MUST mask all frames sent to the server.
+		if frame.(*hybiFrameReader).header.MaskingKey == nil {
+			handler.WriteClose(closeStatusProtocolError)
+			return nil, io.EOF
+		}
+	} else {
+		// The server MUST NOT mask all frames.
+		if frame.(*hybiFrameReader).header.MaskingKey != nil {
+			handler.WriteClose(closeStatusProtocolError)
+			return nil, io.EOF
+		}
+	}
+	if header := frame.HeaderReader(); header != nil {
+		io.Copy(ioutil.Discard, header)
+	}
+	switch frame.PayloadType() {
+	case ContinuationFrame:
+		frame.(*hybiFrameReader).header.OpCode = handler.payloadType
+	case TextFrame, BinaryFrame:
+		handler.payloadType = frame.PayloadType()
+	case CloseFrame:
+		return nil, io.EOF
+	case PingFrame:
+		pingMsg := make([]byte, maxControlFramePayloadLength)
+		n, err := io.ReadFull(frame, pingMsg)
+		if err != nil && err != io.ErrUnexpectedEOF {
+			return nil, err
+		}
+		io.Copy(ioutil.Discard, frame)
+		n, err = handler.WritePong(pingMsg[:n])
+		if err != nil {
+			return nil, err
+		}
+		return nil, nil
+	case PongFrame:
+		return nil, ErrNotImplemented
+	}
+	return frame, nil
+}
+
+func (handler *hybiFrameHandler) WriteClose(status int) (err error) {
+	handler.conn.wio.Lock()
+	defer handler.conn.wio.Unlock()
+	w, err := handler.conn.frameWriterFactory.NewFrameWriter(CloseFrame)
+	if err != nil {
+		return err
+	}
+	msg := make([]byte, 2)
+	binary.BigEndian.PutUint16(msg, uint16(status))
+	_, err = w.Write(msg)
+	w.Close()
+	return err
+}
+
+func (handler *hybiFrameHandler) WritePong(msg []byte) (n int, err error) {
+	handler.conn.wio.Lock()
+	defer handler.conn.wio.Unlock()
+	w, err := handler.conn.frameWriterFactory.NewFrameWriter(PongFrame)
+	if err != nil {
+		return 0, err
+	}
+	n, err = w.Write(msg)
+	w.Close()
+	return n, err
+}
+
+// newHybiConn creates a new WebSocket connection speaking hybi draft protocol.
+func newHybiConn(config *Config, buf *bufio.ReadWriter, rwc io.ReadWriteCloser, request *http.Request) *Conn {
+	if buf == nil {
+		br := bufio.NewReader(rwc)
+		bw := bufio.NewWriter(rwc)
+		buf = bufio.NewReadWriter(br, bw)
+	}
+	ws := &Conn{config: config, request: request, buf: buf, rwc: rwc,
+		frameReaderFactory: hybiFrameReaderFactory{buf.Reader},
+		frameWriterFactory: hybiFrameWriterFactory{
+			buf.Writer, request == nil},
+		PayloadType:        TextFrame,
+		defaultCloseStatus: closeStatusNormal}
+	ws.frameHandler = &hybiFrameHandler{conn: ws}
+	return ws
+}
+
+// generateMaskingKey generates a masking key for a frame.
+func generateMaskingKey() (maskingKey []byte, err error) {
+	maskingKey = make([]byte, 4)
+	if _, err = io.ReadFull(rand.Reader, maskingKey); err != nil {
+		return
+	}
+	return
+}
+
+// generateNonce generates a nonce consisting of a randomly selected 16-byte
+// value that has been base64-encoded.
+func generateNonce() (nonce []byte) {
+	key := make([]byte, 16)
+	if _, err := io.ReadFull(rand.Reader, key); err != nil {
+		panic(err)
+	}
+	nonce = make([]byte, 24)
+	base64.StdEncoding.Encode(nonce, key)
+	return
+}
+
+// getNonceAccept computes the base64-encoded SHA-1 of the concatenation of
+// the nonce ("Sec-WebSocket-Key" value) with the websocket GUID string.
+func getNonceAccept(nonce []byte) (expected []byte, err error) {
+	h := sha1.New()
+	if _, err = h.Write(nonce); err != nil {
+		return
+	}
+	if _, err = h.Write([]byte(websocketGUID)); err != nil {
+		return
+	}
+	expected = make([]byte, 28)
+	base64.StdEncoding.Encode(expected, h.Sum(nil))
+	return
+}
+
+// Client handshake described in draft-ietf-hybi-thewebsocket-protocol-17
+func hybiClientHandshake(config *Config, br *bufio.Reader, bw *bufio.Writer) (err error) {
+	bw.WriteString("GET " + config.Location.RequestURI() + " HTTP/1.1\r\n")
+
+	bw.WriteString("Host: " + config.Location.Host + "\r\n")
+	bw.WriteString("Upgrade: websocket\r\n")
+	bw.WriteString("Connection: Upgrade\r\n")
+	nonce := generateNonce()
+	if config.handshakeData != nil {
+		nonce = []byte(config.handshakeData["key"])
+	}
+	bw.WriteString("Sec-WebSocket-Key: " + string(nonce) + "\r\n")
+	bw.WriteString("Origin: " + strings.ToLower(config.Origin.String()) + "\r\n")
+
+	if config.Version != ProtocolVersionHybi13 {
+		return ErrBadProtocolVersion
+	}
+
+	bw.WriteString("Sec-WebSocket-Version: " + fmt.Sprintf("%d", config.Version) + "\r\n")
+	if len(config.Protocol) > 0 {
+		bw.WriteString("Sec-WebSocket-Protocol: " + strings.Join(config.Protocol, ", ") + "\r\n")
+	}
+	// TODO(ukai): send Sec-WebSocket-Extensions.
+	err = config.Header.WriteSubset(bw, handshakeHeader)
+	if err != nil {
+		return err
+	}
+
+	bw.WriteString("\r\n")
+	if err = bw.Flush(); err != nil {
+		return err
+	}
+
+	resp, err := http.ReadResponse(br, &http.Request{Method: "GET"})
+	if err != nil {
+		return err
+	}
+	if resp.StatusCode != 101 {
+		return ErrBadStatus
+	}
+	if strings.ToLower(resp.Header.Get("Upgrade")) != "websocket" ||
+		strings.ToLower(resp.Header.Get("Connection")) != "upgrade" {
+		return ErrBadUpgrade
+	}
+	expectedAccept, err := getNonceAccept(nonce)
+	if err != nil {
+		return err
+	}
+	if resp.Header.Get("Sec-WebSocket-Accept") != string(expectedAccept) {
+		return ErrChallengeResponse
+	}
+	if resp.Header.Get("Sec-WebSocket-Extensions") != "" {
+		return ErrUnsupportedExtensions
+	}
+	offeredProtocol := resp.Header.Get("Sec-WebSocket-Protocol")
+	if offeredProtocol != "" {
+		protocolMatched := false
+		for i := 0; i < len(config.Protocol); i++ {
+			if config.Protocol[i] == offeredProtocol {
+				protocolMatched = true
+				break
+			}
+		}
+		if !protocolMatched {
+			return ErrBadWebSocketProtocol
+		}
+		config.Protocol = []string{offeredProtocol}
+	}
+
+	return nil
+}
+
+// newHybiClientConn creates a client WebSocket connection after handshake.
+func newHybiClientConn(config *Config, buf *bufio.ReadWriter, rwc io.ReadWriteCloser) *Conn {
+	return newHybiConn(config, buf, rwc, nil)
+}
+
+// A HybiServerHandshaker performs a server handshake using hybi draft protocol.
+type hybiServerHandshaker struct {
+	*Config
+	accept []byte
+}
+
+func (c *hybiServerHandshaker) ReadHandshake(buf *bufio.Reader, req *http.Request) (code int, err error) {
+	c.Version = ProtocolVersionHybi13
+	if req.Method != "GET" {
+		return http.StatusMethodNotAllowed, ErrBadRequestMethod
+	}
+	// HTTP version can be safely ignored.
+
+	if strings.ToLower(req.Header.Get("Upgrade")) != "websocket" ||
+		!strings.Contains(strings.ToLower(req.Header.Get("Connection")), "upgrade") {
+		return http.StatusBadRequest, ErrNotWebSocket
+	}
+
+	key := req.Header.Get("Sec-Websocket-Key")
+	if key == "" {
+		return http.StatusBadRequest, ErrChallengeResponse
+	}
+	version := req.Header.Get("Sec-Websocket-Version")
+	switch version {
+	case "13":
+		c.Version = ProtocolVersionHybi13
+	default:
+		return http.StatusBadRequest, ErrBadWebSocketVersion
+	}
+	var scheme string
+	if req.TLS != nil {
+		scheme = "wss"
+	} else {
+		scheme = "ws"
+	}
+	c.Location, err = url.ParseRequestURI(scheme + "://" + req.Host + req.URL.RequestURI())
+	if err != nil {
+		return http.StatusBadRequest, err
+	}
+	protocol := strings.TrimSpace(req.Header.Get("Sec-Websocket-Protocol"))
+	if protocol != "" {
+		protocols := strings.Split(protocol, ",")
+		for i := 0; i < len(protocols); i++ {
+			c.Protocol = append(c.Protocol, strings.TrimSpace(protocols[i]))
+		}
+	}
+	c.accept, err = getNonceAccept([]byte(key))
+	if err != nil {
+		return http.StatusInternalServerError, err
+	}
+	return http.StatusSwitchingProtocols, nil
+}
+
+// Origin parses Origin header in "req".
+// If origin is "null", returns (nil, nil).
+func Origin(config *Config, req *http.Request) (*url.URL, error) {
+	var origin string
+	switch config.Version {
+	case ProtocolVersionHybi13:
+		origin = req.Header.Get("Origin")
+	}
+	if origin == "null" {
+		return nil, nil
+	}
+	return url.ParseRequestURI(origin)
+}
+
+func (c *hybiServerHandshaker) AcceptHandshake(buf *bufio.Writer) (err error) {
+	if len(c.Protocol) > 0 {
+		if len(c.Protocol) != 1 {
+			// You need choose a Protocol in Handshake func in Server.
+			return ErrBadWebSocketProtocol
+		}
+	}
+	buf.WriteString("HTTP/1.1 101 Switching Protocols\r\n")
+	buf.WriteString("Upgrade: websocket\r\n")
+	buf.WriteString("Connection: Upgrade\r\n")
+	buf.WriteString("Sec-WebSocket-Accept: " + string(c.accept) + "\r\n")
+	if len(c.Protocol) > 0 {
+		buf.WriteString("Sec-WebSocket-Protocol: " + c.Protocol[0] + "\r\n")
+	}
+	// TODO(ukai): send Sec-WebSocket-Extensions.
+	if c.Header != nil {
+		err := c.Header.WriteSubset(buf, handshakeHeader)
+		if err != nil {
+			return err
+		}
+	}
+	buf.WriteString("\r\n")
+	return buf.Flush()
+}
+
+func (c *hybiServerHandshaker) NewServerConn(buf *bufio.ReadWriter, rwc io.ReadWriteCloser, request *http.Request) *Conn {
+	return newHybiServerConn(c.Config, buf, rwc, request)
+}
+
+// newHybiServerConn returns a new WebSocket connection speaking hybi draft protocol.
+func newHybiServerConn(config *Config, buf *bufio.ReadWriter, rwc io.ReadWriteCloser, request *http.Request) *Conn {
+	return newHybiConn(config, buf, rwc, request)
+}

Godeps/_workspace/src/code.google.com/p/go.net/websocket/hybi_test.go

@@ -0,0 +1,590 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package websocket
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strings"
+	"testing"
+)
+
+// Test the getNonceAccept function with values in
+// http://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-17
+func TestSecWebSocketAccept(t *testing.T) {
+	nonce := []byte("dGhlIHNhbXBsZSBub25jZQ==")
+	expected := []byte("s3pPLMBiTxaQ9kYGzzhZRbK+xOo=")
+	accept, err := getNonceAccept(nonce)
+	if err != nil {
+		t.Errorf("getNonceAccept: returned error %v", err)
+		return
+	}
+	if !bytes.Equal(expected, accept) {
+		t.Errorf("getNonceAccept: expected %q got %q", expected, accept)
+	}
+}
+
+func TestHybiClientHandshake(t *testing.T) {
+	b := bytes.NewBuffer([]byte{})
+	bw := bufio.NewWriter(b)
+	br := bufio.NewReader(strings.NewReader(`HTTP/1.1 101 Switching Protocols
+Upgrade: websocket
+Connection: Upgrade
+Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=
+Sec-WebSocket-Protocol: chat
+
+`))
+	var err error
+	config := new(Config)
+	config.Location, err = url.ParseRequestURI("ws://server.example.com/chat")
+	if err != nil {
+		t.Fatal("location url", err)
+	}
+	config.Origin, err = url.ParseRequestURI("http://example.com")
+	if err != nil {
+		t.Fatal("origin url", err)
+	}
+	config.Protocol = append(config.Protocol, "chat")
+	config.Protocol = append(config.Protocol, "superchat")
+	config.Version = ProtocolVersionHybi13
+
+	config.handshakeData = map[string]string{
+		"key": "dGhlIHNhbXBsZSBub25jZQ==",
+	}
+	err = hybiClientHandshake(config, br, bw)
+	if err != nil {
+		t.Errorf("handshake failed: %v", err)
+	}
+	req, err := http.ReadRequest(bufio.NewReader(b))
+	if err != nil {
+		t.Fatalf("read request: %v", err)
+	}
+	if req.Method != "GET" {
+		t.Errorf("request method expected GET, but got %q", req.Method)
+	}
+	if req.URL.Path != "/chat" {
+		t.Errorf("request path expected /chat, but got %q", req.URL.Path)
+	}
+	if req.Proto != "HTTP/1.1" {
+		t.Errorf("request proto expected HTTP/1.1, but got %q", req.Proto)
+	}
+	if req.Host != "server.example.com" {
+		t.Errorf("request Host expected server.example.com, but got %v", req.Host)
+	}
+	var expectedHeader = map[string]string{
+		"Connection":             "Upgrade",
+		"Upgrade":                "websocket",
+		"Sec-Websocket-Key":      config.handshakeData["key"],
+		"Origin":                 config.Origin.String(),
+		"Sec-Websocket-Protocol": "chat, superchat",
+		"Sec-Websocket-Version":  fmt.Sprintf("%d", ProtocolVersionHybi13),
+	}
+	for k, v := range expectedHeader {
+		if req.Header.Get(k) != v {
+			t.Errorf(fmt.Sprintf("%s expected %q but got %q", k, v, req.Header.Get(k)))
+		}
+	}
+}
+
+func TestHybiClientHandshakeWithHeader(t *testing.T) {
+	b := bytes.NewBuffer([]byte{})
+	bw := bufio.NewWriter(b)
+	br := bufio.NewReader(strings.NewReader(`HTTP/1.1 101 Switching Protocols
+Upgrade: websocket
+Connection: Upgrade
+Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=
+Sec-WebSocket-Protocol: chat
+
+`))
+	var err error
+	config := new(Config)
+	config.Location, err = url.ParseRequestURI("ws://server.example.com/chat")
+	if err != nil {
+		t.Fatal("location url", err)
+	}
+	config.Origin, err = url.ParseRequestURI("http://example.com")
+	if err != nil {
+		t.Fatal("origin url", err)
+	}
+	config.Protocol = append(config.Protocol, "chat")
+	config.Protocol = append(config.Protocol, "superchat")
+	config.Version = ProtocolVersionHybi13
+	config.Header = http.Header(make(map[string][]string))
+	config.Header.Add("User-Agent", "test")
+
+	config.handshakeData = map[string]string{
+		"key": "dGhlIHNhbXBsZSBub25jZQ==",
+	}
+	err = hybiClientHandshake(config, br, bw)
+	if err != nil {
+		t.Errorf("handshake failed: %v", err)
+	}
+	req, err := http.ReadRequest(bufio.NewReader(b))
+	if err != nil {
+		t.Fatalf("read request: %v", err)
+	}
+	if req.Method != "GET" {
+		t.Errorf("request method expected GET, but got %q", req.Method)
+	}
+	if req.URL.Path != "/chat" {
+		t.Errorf("request path expected /chat, but got %q", req.URL.Path)
+	}
+	if req.Proto != "HTTP/1.1" {
+		t.Errorf("request proto expected HTTP/1.1, but got %q", req.Proto)
+	}
+	if req.Host != "server.example.com" {
+		t.Errorf("request Host expected server.example.com, but got %v", req.Host)
+	}
+	var expectedHeader = map[string]string{
+		"Connection":             "Upgrade",
+		"Upgrade":                "websocket",
+		"Sec-Websocket-Key":      config.handshakeData["key"],
+		"Origin":                 config.Origin.String(),
+		"Sec-Websocket-Protocol": "chat, superchat",
+		"Sec-Websocket-Version":  fmt.Sprintf("%d", ProtocolVersionHybi13),
+		"User-Agent":             "test",
+	}
+	for k, v := range expectedHeader {
+		if req.Header.Get(k) != v {
+			t.Errorf(fmt.Sprintf("%s expected %q but got %q", k, v, req.Header.Get(k)))
+		}
+	}
+}
+
+func TestHybiServerHandshake(t *testing.T) {
+	config := new(Config)
+	handshaker := &hybiServerHandshaker{Config: config}
+	br := bufio.NewReader(strings.NewReader(`GET /chat HTTP/1.1
+Host: server.example.com
+Upgrade: websocket
+Connection: Upgrade
+Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
+Origin: http://example.com
+Sec-WebSocket-Protocol: chat, superchat
+Sec-WebSocket-Version: 13
+
+`))
+	req, err := http.ReadRequest(br)
+	if err != nil {
+		t.Fatal("request", err)
+	}
+	code, err := handshaker.ReadHandshake(br, req)
+	if err != nil {
+		t.Errorf("handshake failed: %v", err)
+	}
+	if code != http.StatusSwitchingProtocols {
+		t.Errorf("status expected %q but got %q", http.StatusSwitchingProtocols, code)
+	}
+	expectedProtocols := []string{"chat", "superchat"}
+	if fmt.Sprintf("%v", config.Protocol) != fmt.Sprintf("%v", expectedProtocols) {
+		t.Errorf("protocol expected %q but got %q", expectedProtocols, config.Protocol)
+	}
+	b := bytes.NewBuffer([]byte{})
+	bw := bufio.NewWriter(b)
+
+	config.Protocol = config.Protocol[:1]
+
+	err = handshaker.AcceptHandshake(bw)
+	if err != nil {
+		t.Errorf("handshake response failed: %v", err)
+	}
+	expectedResponse := strings.Join([]string{
+		"HTTP/1.1 101 Switching Protocols",
+		"Upgrade: websocket",
+		"Connection: Upgrade",
+		"Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=",
+		"Sec-WebSocket-Protocol: chat",
+		"", ""}, "\r\n")
+
+	if b.String() != expectedResponse {
+		t.Errorf("handshake expected %q but got %q", expectedResponse, b.String())
+	}
+}
+
+func TestHybiServerHandshakeNoSubProtocol(t *testing.T) {
+	config := new(Config)
+	handshaker := &hybiServerHandshaker{Config: config}
+	br := bufio.NewReader(strings.NewReader(`GET /chat HTTP/1.1
+Host: server.example.com
+Upgrade: websocket
+Connection: Upgrade
+Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
+Origin: http://example.com
+Sec-WebSocket-Version: 13
+
+`))
+	req, err := http.ReadRequest(br)
+	if err != nil {
+		t.Fatal("request", err)
+	}
+	code, err := handshaker.ReadHandshake(br, req)
+	if err != nil {
+		t.Errorf("handshake failed: %v", err)
+	}
+	if code != http.StatusSwitchingProtocols {
+		t.Errorf("status expected %q but got %q", http.StatusSwitchingProtocols, code)
+	}
+	if len(config.Protocol) != 0 {
+		t.Errorf("len(config.Protocol) expected 0, but got %q", len(config.Protocol))
+	}
+	b := bytes.NewBuffer([]byte{})
+	bw := bufio.NewWriter(b)
+
+	err = handshaker.AcceptHandshake(bw)
+	if err != nil {
+		t.Errorf("handshake response failed: %v", err)
+	}
+	expectedResponse := strings.Join([]string{
+		"HTTP/1.1 101 Switching Protocols",
+		"Upgrade: websocket",
+		"Connection: Upgrade",
+		"Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=",
+		"", ""}, "\r\n")
+
+	if b.String() != expectedResponse {
+		t.Errorf("handshake expected %q but got %q", expectedResponse, b.String())
+	}
+}
+
+func TestHybiServerHandshakeHybiBadVersion(t *testing.T) {
+	config := new(Config)
+	handshaker := &hybiServerHandshaker{Config: config}
+	br := bufio.NewReader(strings.NewReader(`GET /chat HTTP/1.1
+Host: server.example.com
+Upgrade: websocket
+Connection: Upgrade
+Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
+Sec-WebSocket-Origin: http://example.com
+Sec-WebSocket-Protocol: chat, superchat
+Sec-WebSocket-Version: 9
+
+`))
+	req, err := http.ReadRequest(br)
+	if err != nil {
+		t.Fatal("request", err)
+	}
+	code, err := handshaker.ReadHandshake(br, req)
+	if err != ErrBadWebSocketVersion {
+		t.Errorf("handshake expected err %q but got %q", ErrBadWebSocketVersion, err)
+	}
+	if code != http.StatusBadRequest {
+		t.Errorf("status expected %q but got %q", http.StatusBadRequest, code)
+	}
+}
+
+func testHybiFrame(t *testing.T, testHeader, testPayload, testMaskedPayload []byte, frameHeader *hybiFrameHeader) {
+	b := bytes.NewBuffer([]byte{})
+	frameWriterFactory := &hybiFrameWriterFactory{bufio.NewWriter(b), false}
+	w, _ := frameWriterFactory.NewFrameWriter(TextFrame)
+	w.(*hybiFrameWriter).header = frameHeader
+	_, err := w.Write(testPayload)
+	w.Close()
+	if err != nil {
+		t.Errorf("Write error %q", err)
+	}
+	var expectedFrame []byte
+	expectedFrame = append(expectedFrame, testHeader...)
+	expectedFrame = append(expectedFrame, testMaskedPayload...)
+	if !bytes.Equal(expectedFrame, b.Bytes()) {
+		t.Errorf("frame expected %q got %q", expectedFrame, b.Bytes())
+	}
+	frameReaderFactory := &hybiFrameReaderFactory{bufio.NewReader(b)}
+	r, err := frameReaderFactory.NewFrameReader()
+	if err != nil {
+		t.Errorf("Read error %q", err)
+	}
+	if header := r.HeaderReader(); header == nil {
+		t.Errorf("no header")
+	} else {
+		actualHeader := make([]byte, r.Len())
+		n, err := header.Read(actualHeader)
+		if err != nil {
+			t.Errorf("Read header error %q", err)
+		} else {
+			if n < len(testHeader) {
+				t.Errorf("header too short %q got %q", testHeader, actualHeader[:n])
+			}
+			if !bytes.Equal(testHeader, actualHeader[:n]) {
+				t.Errorf("header expected %q got %q", testHeader, actualHeader[:n])
+			}
+		}
+	}
+	if trailer := r.TrailerReader(); trailer != nil {
+		t.Errorf("unexpected trailer %q", trailer)
+	}
+	frame := r.(*hybiFrameReader)
+	if frameHeader.Fin != frame.header.Fin ||
+		frameHeader.OpCode != frame.header.OpCode ||
+		len(testPayload) != int(frame.header.Length) {
+		t.Errorf("mismatch %v (%d) vs %v", frameHeader, len(testPayload), frame)
+	}
+	payload := make([]byte, len(testPayload))
+	_, err = r.Read(payload)
+	if err != nil {
+		t.Errorf("read %v", err)
+	}
+	if !bytes.Equal(testPayload, payload) {
+		t.Errorf("payload %q vs %q", testPayload, payload)
+	}
+}
+
+func TestHybiShortTextFrame(t *testing.T) {
+	frameHeader := &hybiFrameHeader{Fin: true, OpCode: TextFrame}
+	payload := []byte("hello")
+	testHybiFrame(t, []byte{0x81, 0x05}, payload, payload, frameHeader)
+
+	payload = make([]byte, 125)
+	testHybiFrame(t, []byte{0x81, 125}, payload, payload, frameHeader)
+}
+
+func TestHybiShortMaskedTextFrame(t *testing.T) {
+	frameHeader := &hybiFrameHeader{Fin: true, OpCode: TextFrame,
+		MaskingKey: []byte{0xcc, 0x55, 0x80, 0x20}}
+	payload := []byte("hello")
+	maskedPayload := []byte{0xa4, 0x30, 0xec, 0x4c, 0xa3}
+	header := []byte{0x81, 0x85}
+	header = append(header, frameHeader.MaskingKey...)
+	testHybiFrame(t, header, payload, maskedPayload, frameHeader)
+}
+
+func TestHybiShortBinaryFrame(t *testing.T) {
+	frameHeader := &hybiFrameHeader{Fin: true, OpCode: BinaryFrame}
+	payload := []byte("hello")
+	testHybiFrame(t, []byte{0x82, 0x05}, payload, payload, frameHeader)
+
+	payload = make([]byte, 125)
+	testHybiFrame(t, []byte{0x82, 125}, payload, payload, frameHeader)
+}
+
+func TestHybiControlFrame(t *testing.T) {
+	frameHeader := &hybiFrameHeader{Fin: true, OpCode: PingFrame}
+	payload := []byte("hello")
+	testHybiFrame(t, []byte{0x89, 0x05}, payload, payload, frameHeader)
+
+	frameHeader = &hybiFrameHeader{Fin: true, OpCode: PongFrame}
+	testHybiFrame(t, []byte{0x8A, 0x05}, payload, payload, frameHeader)
+
+	frameHeader = &hybiFrameHeader{Fin: true, OpCode: CloseFrame}
+	payload = []byte{0x03, 0xe8} // 1000
+	testHybiFrame(t, []byte{0x88, 0x02}, payload, payload, frameHeader)
+}
+
+func TestHybiLongFrame(t *testing.T) {
+	frameHeader := &hybiFrameHeader{Fin: true, OpCode: TextFrame}
+	payload := make([]byte, 126)
+	testHybiFrame(t, []byte{0x81, 126, 0x00, 126}, payload, payload, frameHeader)
+
+	payload = make([]byte, 65535)
+	testHybiFrame(t, []byte{0x81, 126, 0xff, 0xff}, payload, payload, frameHeader)
+
+	payload = make([]byte, 65536)
+	testHybiFrame(t, []byte{0x81, 127, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00}, payload, payload, frameHeader)
+}
+
+func TestHybiClientRead(t *testing.T) {
+	wireData := []byte{0x81, 0x05, 'h', 'e', 'l', 'l', 'o',
+		0x89, 0x05, 'h', 'e', 'l', 'l', 'o', // ping
+		0x81, 0x05, 'w', 'o', 'r', 'l', 'd'}
+	br := bufio.NewReader(bytes.NewBuffer(wireData))
+	bw := bufio.NewWriter(bytes.NewBuffer([]byte{}))
+	conn := newHybiConn(newConfig(t, "/"), bufio.NewReadWriter(br, bw), nil, nil)
+
+	msg := make([]byte, 512)
+	n, err := conn.Read(msg)
+	if err != nil {
+		t.Errorf("read 1st frame, error %q", err)
+	}
+	if n != 5 {
+		t.Errorf("read 1st frame, expect 5, got %d", n)
+	}
+	if !bytes.Equal(wireData[2:7], msg[:n]) {
+		t.Errorf("read 1st frame %v, got %v", wireData[2:7], msg[:n])
+	}
+	n, err = conn.Read(msg)
+	if err != nil {
+		t.Errorf("read 2nd frame, error %q", err)
+	}
+	if n != 5 {
+		t.Errorf("read 2nd frame, expect 5, got %d", n)
+	}
+	if !bytes.Equal(wireData[16:21], msg[:n]) {
+		t.Errorf("read 2nd frame %v, got %v", wireData[16:21], msg[:n])
+	}
+	n, err = conn.Read(msg)
+	if err == nil {
+		t.Errorf("read not EOF")
+	}
+	if n != 0 {
+		t.Errorf("expect read 0, got %d", n)
+	}
+}
+
+func TestHybiShortRead(t *testing.T) {
+	wireData := []byte{0x81, 0x05, 'h', 'e', 'l', 'l', 'o',
+		0x89, 0x05, 'h', 'e', 'l', 'l', 'o', // ping
+		0x81, 0x05, 'w', 'o', 'r', 'l', 'd'}
+	br := bufio.NewReader(bytes.NewBuffer(wireData))
+	bw := bufio.NewWriter(bytes.NewBuffer([]byte{}))
+	conn := newHybiConn(newConfig(t, "/"), bufio.NewReadWriter(br, bw), nil, nil)
+
+	step := 0
+	pos := 0
+	expectedPos := []int{2, 5, 16, 19}
+	expectedLen := []int{3, 2, 3, 2}
+	for {
+		msg := make([]byte, 3)
+		n, err := conn.Read(msg)
+		if step >= len(expectedPos) {
+			if err == nil {
+				t.Errorf("read not EOF")
+			}
+			if n != 0 {
+				t.Errorf("expect read 0, got %d", n)
+			}
+			return
+		}
+		pos = expectedPos[step]
+		endPos := pos + expectedLen[step]
+		if err != nil {
+			t.Errorf("read from %d, got error %q", pos, err)
+			return
+		}
+		if n != endPos-pos {
+			t.Errorf("read from %d, expect %d, got %d", pos, endPos-pos, n)
+		}
+		if !bytes.Equal(wireData[pos:endPos], msg[:n]) {
+			t.Errorf("read from %d, frame %v, got %v", pos, wireData[pos:endPos], msg[:n])
+		}
+		step++
+	}
+}
+
+func TestHybiServerRead(t *testing.T) {
+	wireData := []byte{0x81, 0x85, 0xcc, 0x55, 0x80, 0x20,
+		0xa4, 0x30, 0xec, 0x4c, 0xa3, // hello
+		0x89, 0x85, 0xcc, 0x55, 0x80, 0x20,
+		0xa4, 0x30, 0xec, 0x4c, 0xa3, // ping: hello
+		0x81, 0x85, 0xed, 0x83, 0xb4, 0x24,
+		0x9a, 0xec, 0xc6, 0x48, 0x89, // world
+	}
+	br := bufio.NewReader(bytes.NewBuffer(wireData))
+	bw := bufio.NewWriter(bytes.NewBuffer([]byte{}))
+	conn := newHybiConn(newConfig(t, "/"), bufio.NewReadWriter(br, bw), nil, new(http.Request))
+
+	expected := [][]byte{[]byte("hello"), []byte("world")}
+
+	msg := make([]byte, 512)
+	n, err := conn.Read(msg)
+	if err != nil {
+		t.Errorf("read 1st frame, error %q", err)
+	}
+	if n != 5 {
+		t.Errorf("read 1st frame, expect 5, got %d", n)
+	}
+	if !bytes.Equal(expected[0], msg[:n]) {
+		t.Errorf("read 1st frame %q, got %q", expected[0], msg[:n])
+	}
+
+	n, err = conn.Read(msg)
+	if err != nil {
+		t.Errorf("read 2nd frame, error %q", err)
+	}
+	if n != 5 {
+		t.Errorf("read 2nd frame, expect 5, got %d", n)
+	}
+	if !bytes.Equal(expected[1], msg[:n]) {
+		t.Errorf("read 2nd frame %q, got %q", expected[1], msg[:n])
+	}
+
+	n, err = conn.Read(msg)
+	if err == nil {
+		t.Errorf("read not EOF")
+	}
+	if n != 0 {
+		t.Errorf("expect read 0, got %d", n)
+	}
+}
+
+func TestHybiServerReadWithoutMasking(t *testing.T) {
+	wireData := []byte{0x81, 0x05, 'h', 'e', 'l', 'l', 'o'}
+	br := bufio.NewReader(bytes.NewBuffer(wireData))
+	bw := bufio.NewWriter(bytes.NewBuffer([]byte{}))
+	conn := newHybiConn(newConfig(t, "/"), bufio.NewReadWriter(br, bw), nil, new(http.Request))
+	// server MUST close the connection upon receiving a non-masked frame.
+	msg := make([]byte, 512)
+	_, err := conn.Read(msg)
+	if err != io.EOF {
+		t.Errorf("read 1st frame, expect %q, but got %q", io.EOF, err)
+	}
+}
+
+func TestHybiClientReadWithMasking(t *testing.T) {
+	wireData := []byte{0x81, 0x85, 0xcc, 0x55, 0x80, 0x20,
+		0xa4, 0x30, 0xec, 0x4c, 0xa3, // hello
+	}
+	br := bufio.NewReader(bytes.NewBuffer(wireData))
+	bw := bufio.NewWriter(bytes.NewBuffer([]byte{}))
+	conn := newHybiConn(newConfig(t, "/"), bufio.NewReadWriter(br, bw), nil, nil)
+
+	// client MUST close the connection upon receiving a masked frame.
+	msg := make([]byte, 512)
+	_, err := conn.Read(msg)
+	if err != io.EOF {
+		t.Errorf("read 1st frame, expect %q, but got %q", io.EOF, err)
+	}
+}
+
+// Test the hybiServerHandshaker supports firefox implementation and
+// checks Connection request header include (but it's not necessary
+// equal to) "upgrade"
+func TestHybiServerFirefoxHandshake(t *testing.T) {
+	config := new(Config)
+	handshaker := &hybiServerHandshaker{Config: config}
+	br := bufio.NewReader(strings.NewReader(`GET /chat HTTP/1.1
+Host: server.example.com
+Upgrade: websocket
+Connection: keep-alive, upgrade
+Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==
+Origin: http://example.com
+Sec-WebSocket-Protocol: chat, superchat
+Sec-WebSocket-Version: 13
+
+`))
+	req, err := http.ReadRequest(br)
+	if err != nil {
+		t.Fatal("request", err)
+	}
+	code, err := handshaker.ReadHandshake(br, req)
+	if err != nil {
+		t.Errorf("handshake failed: %v", err)
+	}
+	if code != http.StatusSwitchingProtocols {
+		t.Errorf("status expected %q but got %q", http.StatusSwitchingProtocols, code)
+	}
+	b := bytes.NewBuffer([]byte{})
+	bw := bufio.NewWriter(b)
+
+	config.Protocol = []string{"chat"}
+
+	err = handshaker.AcceptHandshake(bw)
+	if err != nil {
+		t.Errorf("handshake response failed: %v", err)
+	}
+	expectedResponse := strings.Join([]string{
+		"HTTP/1.1 101 Switching Protocols",
+		"Upgrade: websocket",
+		"Connection: Upgrade",
+		"Sec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=",
+		"Sec-WebSocket-Protocol: chat",
+		"", ""}, "\r\n")
+
+	if b.String() != expectedResponse {
+		t.Errorf("handshake expected %q but got %q", expectedResponse, b.String())
+	}
+}

Godeps/_workspace/src/code.google.com/p/go.net/websocket/server.go

@@ -0,0 +1,114 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package websocket
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"net/http"
+)
+
+func newServerConn(rwc io.ReadWriteCloser, buf *bufio.ReadWriter, req *http.Request, config *Config, handshake func(*Config, *http.Request) error) (conn *Conn, err error) {
+	var hs serverHandshaker = &hybiServerHandshaker{Config: config}
+	code, err := hs.ReadHandshake(buf.Reader, req)
+	if err == ErrBadWebSocketVersion {
+		fmt.Fprintf(buf, "HTTP/1.1 %03d %s\r\n", code, http.StatusText(code))
+		fmt.Fprintf(buf, "Sec-WebSocket-Version: %s\r\n", SupportedProtocolVersion)
+		buf.WriteString("\r\n")
+		buf.WriteString(err.Error())
+		buf.Flush()
+		return
+	}
+	if err != nil {
+		fmt.Fprintf(buf, "HTTP/1.1 %03d %s\r\n", code, http.StatusText(code))
+		buf.WriteString("\r\n")
+		buf.WriteString(err.Error())
+		buf.Flush()
+		return
+	}
+	if handshake != nil {
+		err = handshake(config, req)
+		if err != nil {
+			code = http.StatusForbidden
+			fmt.Fprintf(buf, "HTTP/1.1 %03d %s\r\n", code, http.StatusText(code))
+			buf.WriteString("\r\n")
+			buf.Flush()
+			return
+		}
+	}
+	err = hs.AcceptHandshake(buf.Writer)
+	if err != nil {
+		code = http.StatusBadRequest
+		fmt.Fprintf(buf, "HTTP/1.1 %03d %s\r\n", code, http.StatusText(code))
+		buf.WriteString("\r\n")
+		buf.Flush()
+		return
+	}
+	conn = hs.NewServerConn(buf, rwc, req)
+	return
+}
+
+// Server represents a server of a WebSocket.
+type Server struct {
+	// Config is a WebSocket configuration for new WebSocket connection.
+	Config
+
+	// Handshake is an optional function in WebSocket handshake.
+	// For example, you can check, or don't check Origin header.
+	// Another example, you can select config.Protocol.
+	Handshake func(*Config, *http.Request) error
+
+	// Handler handles a WebSocket connection.
+	Handler
+}
+
+// ServeHTTP implements the http.Handler interface for a WebSocket
+func (s Server) ServeHTTP(w http.ResponseWriter, req *http.Request) {
+	s.serveWebSocket(w, req)
+}
+
+func (s Server) serveWebSocket(w http.ResponseWriter, req *http.Request) {
+	rwc, buf, err := w.(http.Hijacker).Hijack()
+	if err != nil {
+		panic("Hijack failed: " + err.Error())
+		return
+	}
+	// The server should abort the WebSocket connection if it finds
+	// the client did not send a handshake that matches with protocol
+	// specification.
+	defer rwc.Close()
+	conn, err := newServerConn(rwc, buf, req, &s.Config, s.Handshake)
+	if err != nil {
+		return
+	}
+	if conn == nil {
+		panic("unexpected nil conn")
+	}
+	s.Handler(conn)
+}
+
+// Handler is a simple interface to a WebSocket browser client.
+// It checks if Origin header is valid URL by default.
+// You might want to verify websocket.Conn.Config().Origin in the func.
+// If you use Server instead of Handler, you could call websocket.Origin and
+// check the origin in your Handshake func. So, if you want to accept
+// non-browser client, which doesn't send Origin header, you could use Server
+//. that doesn't check origin in its Handshake.
+type Handler func(*Conn)
+
+func checkOrigin(config *Config, req *http.Request) (err error) {
+	config.Origin, err = Origin(config, req)
+	if err == nil && config.Origin == nil {
+		return fmt.Errorf("null origin")
+	}
+	return err
+}
+
+// ServeHTTP implements the http.Handler interface for a WebSocket
+func (h Handler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
+	s := Server{Handler: h, Handshake: checkOrigin}
+	s.serveWebSocket(w, req)
+}

Godeps/_workspace/src/code.google.com/p/go.net/websocket/websocket.go

@@ -0,0 +1,411 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package websocket implements a client and server for the WebSocket protocol
+// as specified in RFC 6455.
+package websocket
+
+import (
+	"bufio"
+	"crypto/tls"
+	"encoding/json"
+	"errors"
+	"io"
+	"io/ioutil"
+	"net"
+	"net/http"
+	"net/url"
+	"sync"
+	"time"
+)
+
+const (
+	ProtocolVersionHybi13    = 13
+	ProtocolVersionHybi      = ProtocolVersionHybi13
+	SupportedProtocolVersion = "13"
+
+	ContinuationFrame = 0
+	TextFrame         = 1
+	BinaryFrame       = 2
+	CloseFrame        = 8
+	PingFrame         = 9
+	PongFrame         = 10
+	UnknownFrame      = 255
+)
+
+// ProtocolError represents WebSocket protocol errors.
+type ProtocolError struct {
+	ErrorString string
+}
+
+func (err *ProtocolError) Error() string { return err.ErrorString }
+
+var (
+	ErrBadProtocolVersion   = &ProtocolError{"bad protocol version"}
+	ErrBadScheme            = &ProtocolError{"bad scheme"}
+	ErrBadStatus            = &ProtocolError{"bad status"}
+	ErrBadUpgrade           = &ProtocolError{"missing or bad upgrade"}
+	ErrBadWebSocketOrigin   = &ProtocolError{"missing or bad WebSocket-Origin"}
+	ErrBadWebSocketLocation = &ProtocolError{"missing or bad WebSocket-Location"}
+	ErrBadWebSocketProtocol = &ProtocolError{"missing or bad WebSocket-Protocol"}
+	ErrBadWebSocketVersion  = &ProtocolError{"missing or bad WebSocket Version"}
+	ErrChallengeResponse    = &ProtocolError{"mismatch challenge/response"}
+	ErrBadFrame             = &ProtocolError{"bad frame"}
+	ErrBadFrameBoundary     = &ProtocolError{"not on frame boundary"}
+	ErrNotWebSocket         = &ProtocolError{"not websocket protocol"}
+	ErrBadRequestMethod     = &ProtocolError{"bad method"}
+	ErrNotSupported         = &ProtocolError{"not supported"}
+)
+
+// Addr is an implementation of net.Addr for WebSocket.
+type Addr struct {
+	*url.URL
+}
+
+// Network returns the network type for a WebSocket, "websocket".
+func (addr *Addr) Network() string { return "websocket" }
+
+// Config is a WebSocket configuration
+type Config struct {
+	// A WebSocket server address.
+	Location *url.URL
+
+	// A Websocket client origin.
+	Origin *url.URL
+
+	// WebSocket subprotocols.
+	Protocol []string
+
+	// WebSocket protocol version.
+	Version int
+
+	// TLS config for secure WebSocket (wss).
+	TlsConfig *tls.Config
+
+	// Additional header fields to be sent in WebSocket opening handshake.
+	Header http.Header
+
+	handshakeData map[string]string
+}
+
+// serverHandshaker is an interface to handle WebSocket server side handshake.
+type serverHandshaker interface {
+	// ReadHandshake reads handshake request message from client.
+	// Returns http response code and error if any.
+	ReadHandshake(buf *bufio.Reader, req *http.Request) (code int, err error)
+
+	// AcceptHandshake accepts the client handshake request and sends
+	// handshake response back to client.
+	AcceptHandshake(buf *bufio.Writer) (err error)
+
+	// NewServerConn creates a new WebSocket connection.
+	NewServerConn(buf *bufio.ReadWriter, rwc io.ReadWriteCloser, request *http.Request) (conn *Conn)
+}
+
+// frameReader is an interface to read a WebSocket frame.
+type frameReader interface {
+	// Reader is to read payload of the frame.
+	io.Reader
+
+	// PayloadType returns payload type.
+	PayloadType() byte
+
+	// HeaderReader returns a reader to read header of the frame.
+	HeaderReader() io.Reader
+
+	// TrailerReader returns a reader to read trailer of the frame.
+	// If it returns nil, there is no trailer in the frame.
+	TrailerReader() io.Reader
+
+	// Len returns total length of the frame, including header and trailer.
+	Len() int
+}
+
+// frameReaderFactory is an interface to creates new frame reader.
+type frameReaderFactory interface {
+	NewFrameReader() (r frameReader, err error)
+}
+
+// frameWriter is an interface to write a WebSocket frame.
+type frameWriter interface {
+	// Writer is to write payload of the frame.
+	io.WriteCloser
+}
+
+// frameWriterFactory is an interface to create new frame writer.
+type frameWriterFactory interface {
+	NewFrameWriter(payloadType byte) (w frameWriter, err error)
+}
+
+type frameHandler interface {
+	HandleFrame(frame frameReader) (r frameReader, err error)
+	WriteClose(status int) (err error)
+}
+
+// Conn represents a WebSocket connection.
+type Conn struct {
+	config  *Config
+	request *http.Request
+
+	buf *bufio.ReadWriter
+	rwc io.ReadWriteCloser
+
+	rio sync.Mutex
+	frameReaderFactory
+	frameReader
+
+	wio sync.Mutex
+	frameWriterFactory
+
+	frameHandler
+	PayloadType        byte
+	defaultCloseStatus int
+}
+
+// Read implements the io.Reader interface:
+// it reads data of a frame from the WebSocket connection.
+// if msg is not large enough for the frame data, it fills the msg and next Read
+// will read the rest of the frame data.
+// it reads Text frame or Binary frame.
+func (ws *Conn) Read(msg []byte) (n int, err error) {
+	ws.rio.Lock()
+	defer ws.rio.Unlock()
+again:
+	if ws.frameReader == nil {
+		frame, err := ws.frameReaderFactory.NewFrameReader()
+		if err != nil {
+			return 0, err
+		}
+		ws.frameReader, err = ws.frameHandler.HandleFrame(frame)
+		if err != nil {
+			return 0, err
+		}
+		if ws.frameReader == nil {
+			goto again
+		}
+	}
+	n, err = ws.frameReader.Read(msg)
+	if err == io.EOF {
+		if trailer := ws.frameReader.TrailerReader(); trailer != nil {
+			io.Copy(ioutil.Discard, trailer)
+		}
+		ws.frameReader = nil
+		goto again
+	}
+	return n, err
+}
+
+// Write implements the io.Writer interface:
+// it writes data as a frame to the WebSocket connection.
+func (ws *Conn) Write(msg []byte) (n int, err error) {
+	ws.wio.Lock()
+	defer ws.wio.Unlock()
+	w, err := ws.frameWriterFactory.NewFrameWriter(ws.PayloadType)
+	if err != nil {
+		return 0, err
+	}
+	n, err = w.Write(msg)
+	w.Close()
+	if err != nil {
+		return n, err
+	}
+	return n, err
+}
+
+// Close implements the io.Closer interface.
+func (ws *Conn) Close() error {
+	err := ws.frameHandler.WriteClose(ws.defaultCloseStatus)
+	if err != nil {
+		return err
+	}
+	return ws.rwc.Close()
+}
+
+func (ws *Conn) IsClientConn() bool { return ws.request == nil }
+func (ws *Conn) IsServerConn() bool { return ws.request != nil }
+
+// LocalAddr returns the WebSocket Origin for the connection for client, or
+// the WebSocket location for server.
+func (ws *Conn) LocalAddr() net.Addr {
+	if ws.IsClientConn() {
+		return &Addr{ws.config.Origin}
+	}
+	return &Addr{ws.config.Location}
+}
+
+// RemoteAddr returns the WebSocket location for the connection for client, or
+// the Websocket Origin for server.
+func (ws *Conn) RemoteAddr() net.Addr {
+	if ws.IsClientConn() {
+		return &Addr{ws.config.Location}
+	}
+	return &Addr{ws.config.Origin}
+}
+
+var errSetDeadline = errors.New("websocket: cannot set deadline: not using a net.Conn")
+
+// SetDeadline sets the connection's network read & write deadlines.
+func (ws *Conn) SetDeadline(t time.Time) error {
+	if conn, ok := ws.rwc.(net.Conn); ok {
+		return conn.SetDeadline(t)
+	}
+	return errSetDeadline
+}
+
+// SetReadDeadline sets the connection's network read deadline.
+func (ws *Conn) SetReadDeadline(t time.Time) error {
+	if conn, ok := ws.rwc.(net.Conn); ok {
+		return conn.SetReadDeadline(t)
+	}
+	return errSetDeadline
+}
+
+// SetWriteDeadline sets the connection's network write deadline.
+func (ws *Conn) SetWriteDeadline(t time.Time) error {
+	if conn, ok := ws.rwc.(net.Conn); ok {
+		return conn.SetWriteDeadline(t)
+	}
+	return errSetDeadline
+}
+
+// Config returns the WebSocket config.
+func (ws *Conn) Config() *Config { return ws.config }
+
+// Request returns the http request upgraded to the WebSocket.
+// It is nil for client side.
+func (ws *Conn) Request() *http.Request { return ws.request }
+
+// Codec represents a symmetric pair of functions that implement a codec.
+type Codec struct {
+	Marshal   func(v interface{}) (data []byte, payloadType byte, err error)
+	Unmarshal func(data []byte, payloadType byte, v interface{}) (err error)
+}
+
+// Send sends v marshaled by cd.Marshal as single frame to ws.
+func (cd Codec) Send(ws *Conn, v interface{}) (err error) {
+	data, payloadType, err := cd.Marshal(v)
+	if err != nil {
+		return err
+	}
+	ws.wio.Lock()
+	defer ws.wio.Unlock()
+	w, err := ws.frameWriterFactory.NewFrameWriter(payloadType)
+	if err != nil {
+		return err
+	}
+	_, err = w.Write(data)
+	w.Close()
+	return err
+}
+
+// Receive receives single frame from ws, unmarshaled by cd.Unmarshal and stores in v.
+func (cd Codec) Receive(ws *Conn, v interface{}) (err error) {
+	ws.rio.Lock()
+	defer ws.rio.Unlock()
+	if ws.frameReader != nil {
+		_, err = io.Copy(ioutil.Discard, ws.frameReader)
+		if err != nil {
+			return err
+		}
+		ws.frameReader = nil
+	}
+again:
+	frame, err := ws.frameReaderFactory.NewFrameReader()
+	if err != nil {
+		return err
+	}
+	frame, err = ws.frameHandler.HandleFrame(frame)
+	if err != nil {
+		return err
+	}
+	if frame == nil {
+		goto again
+	}
+	payloadType := frame.PayloadType()
+	data, err := ioutil.ReadAll(frame)
+	if err != nil {
+		return err
+	}
+	return cd.Unmarshal(data, payloadType, v)
+}
+
+func marshal(v interface{}) (msg []byte, payloadType byte, err error) {
+	switch data := v.(type) {
+	case string:
+		return []byte(data), TextFrame, nil
+	case []byte:
+		return data, BinaryFrame, nil
+	}
+	return nil, UnknownFrame, ErrNotSupported
+}
+
+func unmarshal(msg []byte, payloadType byte, v interface{}) (err error) {
+	switch data := v.(type) {
+	case *string:
+		*data = string(msg)
+		return nil
+	case *[]byte:
+		*data = msg
+		return nil
+	}
+	return ErrNotSupported
+}
+
+/*
+Message is a codec to send/receive text/binary data in a frame on WebSocket connection.
+To send/receive text frame, use string type.
+To send/receive binary frame, use []byte type.
+
+Trivial usage:
+
+	import "websocket"
+
+	// receive text frame
+	var message string
+	websocket.Message.Receive(ws, &message)
+
+	// send text frame
+	message = "hello"
+	websocket.Message.Send(ws, message)
+
+	// receive binary frame
+	var data []byte
+	websocket.Message.Receive(ws, &data)
+
+	// send binary frame
+	data = []byte{0, 1, 2}
+	websocket.Message.Send(ws, data)
+
+*/
+var Message = Codec{marshal, unmarshal}
+
+func jsonMarshal(v interface{}) (msg []byte, payloadType byte, err error) {
+	msg, err = json.Marshal(v)
+	return msg, TextFrame, err
+}
+
+func jsonUnmarshal(msg []byte, payloadType byte, v interface{}) (err error) {
+	return json.Unmarshal(msg, v)
+}
+
+/*
+JSON is a codec to send/receive JSON data in a frame from a WebSocket connection.
+
+Trivial usage:
+
+	import "websocket"
+
+	type T struct {
+		Msg string
+		Count int
+	}
+
+	// receive JSON type T
+	var data T
+	websocket.JSON.Receive(ws, &data)
+
+	// send JSON type T
+	websocket.JSON.Send(ws, data)
+*/
+var JSON = Codec{jsonMarshal, jsonUnmarshal}

Godeps/_workspace/src/code.google.com/p/go.net/websocket/websocket_test.go

@@ -0,0 +1,341 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package websocket
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"log"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"strings"
+	"sync"
+	"testing"
+)
+
+var serverAddr string
+var once sync.Once
+
+func echoServer(ws *Conn) { io.Copy(ws, ws) }
+
+type Count struct {
+	S string
+	N int
+}
+
+func countServer(ws *Conn) {
+	for {
+		var count Count
+		err := JSON.Receive(ws, &count)
+		if err != nil {
+			return
+		}
+		count.N++
+		count.S = strings.Repeat(count.S, count.N)
+		err = JSON.Send(ws, count)
+		if err != nil {
+			return
+		}
+	}
+}
+
+func subProtocolHandshake(config *Config, req *http.Request) error {
+	for _, proto := range config.Protocol {
+		if proto == "chat" {
+			config.Protocol = []string{proto}
+			return nil
+		}
+	}
+	return ErrBadWebSocketProtocol
+}
+
+func subProtoServer(ws *Conn) {
+	for _, proto := range ws.Config().Protocol {
+		io.WriteString(ws, proto)
+	}
+}
+
+func startServer() {
+	http.Handle("/echo", Handler(echoServer))
+	http.Handle("/count", Handler(countServer))
+	subproto := Server{
+		Handshake: subProtocolHandshake,
+		Handler:   Handler(subProtoServer),
+	}
+	http.Handle("/subproto", subproto)
+	server := httptest.NewServer(nil)
+	serverAddr = server.Listener.Addr().String()
+	log.Print("Test WebSocket server listening on ", serverAddr)
+}
+
+func newConfig(t *testing.T, path string) *Config {
+	config, _ := NewConfig(fmt.Sprintf("ws://%s%s", serverAddr, path), "http://localhost")
+	return config
+}
+
+func TestEcho(t *testing.T) {
+	once.Do(startServer)
+
+	// websocket.Dial()
+	client, err := net.Dial("tcp", serverAddr)
+	if err != nil {
+		t.Fatal("dialing", err)
+	}
+	conn, err := NewClient(newConfig(t, "/echo"), client)
+	if err != nil {
+		t.Errorf("WebSocket handshake error: %v", err)
+		return
+	}
+
+	msg := []byte("hello, world\n")
+	if _, err := conn.Write(msg); err != nil {
+		t.Errorf("Write: %v", err)
+	}
+	var actual_msg = make([]byte, 512)
+	n, err := conn.Read(actual_msg)
+	if err != nil {
+		t.Errorf("Read: %v", err)
+	}
+	actual_msg = actual_msg[0:n]
+	if !bytes.Equal(msg, actual_msg) {
+		t.Errorf("Echo: expected %q got %q", msg, actual_msg)
+	}
+	conn.Close()
+}
+
+func TestAddr(t *testing.T) {
+	once.Do(startServer)
+
+	// websocket.Dial()
+	client, err := net.Dial("tcp", serverAddr)
+	if err != nil {
+		t.Fatal("dialing", err)
+	}
+	conn, err := NewClient(newConfig(t, "/echo"), client)
+	if err != nil {
+		t.Errorf("WebSocket handshake error: %v", err)
+		return
+	}
+
+	ra := conn.RemoteAddr().String()
+	if !strings.HasPrefix(ra, "ws://") || !strings.HasSuffix(ra, "/echo") {
+		t.Errorf("Bad remote addr: %v", ra)
+	}
+	la := conn.LocalAddr().String()
+	if !strings.HasPrefix(la, "http://") {
+		t.Errorf("Bad local addr: %v", la)
+	}
+	conn.Close()
+}
+
+func TestCount(t *testing.T) {
+	once.Do(startServer)
+
+	// websocket.Dial()
+	client, err := net.Dial("tcp", serverAddr)
+	if err != nil {
+		t.Fatal("dialing", err)
+	}
+	conn, err := NewClient(newConfig(t, "/count"), client)
+	if err != nil {
+		t.Errorf("WebSocket handshake error: %v", err)
+		return
+	}
+
+	var count Count
+	count.S = "hello"
+	if err := JSON.Send(conn, count); err != nil {
+		t.Errorf("Write: %v", err)
+	}
+	if err := JSON.Receive(conn, &count); err != nil {
+		t.Errorf("Read: %v", err)
+	}
+	if count.N != 1 {
+		t.Errorf("count: expected %d got %d", 1, count.N)
+	}
+	if count.S != "hello" {
+		t.Errorf("count: expected %q got %q", "hello", count.S)
+	}
+	if err := JSON.Send(conn, count); err != nil {
+		t.Errorf("Write: %v", err)
+	}
+	if err := JSON.Receive(conn, &count); err != nil {
+		t.Errorf("Read: %v", err)
+	}
+	if count.N != 2 {
+		t.Errorf("count: expected %d got %d", 2, count.N)
+	}
+	if count.S != "hellohello" {
+		t.Errorf("count: expected %q got %q", "hellohello", count.S)
+	}
+	conn.Close()
+}
+
+func TestWithQuery(t *testing.T) {
+	once.Do(startServer)
+
+	client, err := net.Dial("tcp", serverAddr)
+	if err != nil {
+		t.Fatal("dialing", err)
+	}
+
+	config := newConfig(t, "/echo")
+	config.Location, err = url.ParseRequestURI(fmt.Sprintf("ws://%s/echo?q=v", serverAddr))
+	if err != nil {
+		t.Fatal("location url", err)
+	}
+
+	ws, err := NewClient(config, client)
+	if err != nil {
+		t.Errorf("WebSocket handshake: %v", err)
+		return
+	}
+	ws.Close()
+}
+
+func testWithProtocol(t *testing.T, subproto []string) (string, error) {
+	once.Do(startServer)
+
+	client, err := net.Dial("tcp", serverAddr)
+	if err != nil {
+		t.Fatal("dialing", err)
+	}
+
+	config := newConfig(t, "/subproto")
+	config.Protocol = subproto
+
+	ws, err := NewClient(config, client)
+	if err != nil {
+		return "", err
+	}
+	msg := make([]byte, 16)
+	n, err := ws.Read(msg)
+	if err != nil {
+		return "", err
+	}
+	ws.Close()
+	return string(msg[:n]), nil
+}
+
+func TestWithProtocol(t *testing.T) {
+	proto, err := testWithProtocol(t, []string{"chat"})
+	if err != nil {
+		t.Errorf("SubProto: unexpected error: %v", err)
+	}
+	if proto != "chat" {
+		t.Errorf("SubProto: expected %q, got %q", "chat", proto)
+	}
+}
+
+func TestWithTwoProtocol(t *testing.T) {
+	proto, err := testWithProtocol(t, []string{"test", "chat"})
+	if err != nil {
+		t.Errorf("SubProto: unexpected error: %v", err)
+	}
+	if proto != "chat" {
+		t.Errorf("SubProto: expected %q, got %q", "chat", proto)
+	}
+}
+
+func TestWithBadProtocol(t *testing.T) {
+	_, err := testWithProtocol(t, []string{"test"})
+	if err != ErrBadStatus {
+		t.Errorf("SubProto: expected %v, got %v", ErrBadStatus, err)
+	}
+}
+
+func TestHTTP(t *testing.T) {
+	once.Do(startServer)
+
+	// If the client did not send a handshake that matches the protocol
+	// specification, the server MUST return an HTTP response with an
+	// appropriate error code (such as 400 Bad Request)
+	resp, err := http.Get(fmt.Sprintf("http://%s/echo", serverAddr))
+	if err != nil {
+		t.Errorf("Get: error %#v", err)
+		return
+	}
+	if resp == nil {
+		t.Error("Get: resp is null")
+		return
+	}
+	if resp.StatusCode != http.StatusBadRequest {
+		t.Errorf("Get: expected %q got %q", http.StatusBadRequest, resp.StatusCode)
+	}
+}
+
+func TestTrailingSpaces(t *testing.T) {
+	// http://code.google.com/p/go/issues/detail?id=955
+	// The last runs of this create keys with trailing spaces that should not be
+	// generated by the client.
+	once.Do(startServer)
+	config := newConfig(t, "/echo")
+	for i := 0; i < 30; i++ {
+		// body
+		ws, err := DialConfig(config)
+		if err != nil {
+			t.Errorf("Dial #%d failed: %v", i, err)
+			break
+		}
+		ws.Close()
+	}
+}
+
+func TestDialConfigBadVersion(t *testing.T) {
+	once.Do(startServer)
+	config := newConfig(t, "/echo")
+	config.Version = 1234
+
+	_, err := DialConfig(config)
+
+	if dialerr, ok := err.(*DialError); ok {
+		if dialerr.Err != ErrBadProtocolVersion {
+			t.Errorf("dial expected err %q but got %q", ErrBadProtocolVersion, dialerr.Err)
+		}
+	}
+}
+
+func TestSmallBuffer(t *testing.T) {
+	// http://code.google.com/p/go/issues/detail?id=1145
+	// Read should be able to handle reading a fragment of a frame.
+	once.Do(startServer)
+
+	// websocket.Dial()
+	client, err := net.Dial("tcp", serverAddr)
+	if err != nil {
+		t.Fatal("dialing", err)
+	}
+	conn, err := NewClient(newConfig(t, "/echo"), client)
+	if err != nil {
+		t.Errorf("WebSocket handshake error: %v", err)
+		return
+	}
+
+	msg := []byte("hello, world\n")
+	if _, err := conn.Write(msg); err != nil {
+		t.Errorf("Write: %v", err)
+	}
+	var small_msg = make([]byte, 8)
+	n, err := conn.Read(small_msg)
+	if err != nil {
+		t.Errorf("Read: %v", err)
+	}
+	if !bytes.Equal(msg[:len(small_msg)], small_msg) {
+		t.Errorf("Echo: expected %q got %q", msg[:len(small_msg)], small_msg)
+	}
+	var second_msg = make([]byte, len(msg))
+	n, err = conn.Read(second_msg)
+	if err != nil {
+		t.Errorf("Read: %v", err)
+	}
+	second_msg = second_msg[0:n]
+	if !bytes.Equal(msg[len(small_msg):], second_msg) {
+		t.Errorf("Echo: expected %q got %q", msg[len(small_msg):], second_msg)
+	}
+	conn.Close()
+}

Godeps/_workspace/src/code.google.com/p/snappy-go/snappy/decode.go

@@ -0,0 +1,124 @@
+// Copyright 2011 The Snappy-Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package snappy
+
+import (
+	"encoding/binary"
+	"errors"
+)
+
+// ErrCorrupt reports that the input is invalid.
+var ErrCorrupt = errors.New("snappy: corrupt input")
+
+// DecodedLen returns the length of the decoded block.
+func DecodedLen(src []byte) (int, error) {
+	v, _, err := decodedLen(src)
+	return v, err
+}
+
+// decodedLen returns the length of the decoded block and the number of bytes
+// that the length header occupied.
+func decodedLen(src []byte) (blockLen, headerLen int, err error) {
+	v, n := binary.Uvarint(src)
+	if n == 0 {
+		return 0, 0, ErrCorrupt
+	}
+	if uint64(int(v)) != v {
+		return 0, 0, errors.New("snappy: decoded block is too large")
+	}
+	return int(v), n, nil
+}
+
+// Decode returns the decoded form of src. The returned slice may be a sub-
+// slice of dst if dst was large enough to hold the entire decoded block.
+// Otherwise, a newly allocated slice will be returned.
+// It is valid to pass a nil dst.
+func Decode(dst, src []byte) ([]byte, error) {
+	dLen, s, err := decodedLen(src)
+	if err != nil {
+		return nil, err
+	}
+	if len(dst) < dLen {
+		dst = make([]byte, dLen)
+	}
+
+	var d, offset, length int
+	for s < len(src) {
+		switch src[s] & 0x03 {
+		case tagLiteral:
+			x := uint(src[s] >> 2)
+			switch {
+			case x < 60:
+				s += 1
+			case x == 60:
+				s += 2
+				if s > len(src) {
+					return nil, ErrCorrupt
+				}
+				x = uint(src[s-1])
+			case x == 61:
+				s += 3
+				if s > len(src) {
+					return nil, ErrCorrupt
+				}
+				x = uint(src[s-2]) | uint(src[s-1])<<8
+			case x == 62:
+				s += 4
+				if s > len(src) {
+					return nil, ErrCorrupt
+				}
+				x = uint(src[s-3]) | uint(src[s-2])<<8 | uint(src[s-1])<<16
+			case x == 63:
+				s += 5
+				if s > len(src) {
+					return nil, ErrCorrupt
+				}
+				x = uint(src[s-4]) | uint(src[s-3])<<8 | uint(src[s-2])<<16 | uint(src[s-1])<<24
+			}
+			length = int(x + 1)
+			if length <= 0 {
+				return nil, errors.New("snappy: unsupported literal length")
+			}
+			if length > len(dst)-d || length > len(src)-s {
+				return nil, ErrCorrupt
+			}
+			copy(dst[d:], src[s:s+length])
+			d += length
+			s += length
+			continue
+
+		case tagCopy1:
+			s += 2
+			if s > len(src) {
+				return nil, ErrCorrupt
+			}
+			length = 4 + int(src[s-2])>>2&0x7
+			offset = int(src[s-2])&0xe0<<3 | int(src[s-1])
+
+		case tagCopy2:
+			s += 3
+			if s > len(src) {
+				return nil, ErrCorrupt
+			}
+			length = 1 + int(src[s-3])>>2
+			offset = int(src[s-2]) | int(src[s-1])<<8
+
+		case tagCopy4:
+			return nil, errors.New("snappy: unsupported COPY_4 tag")
+		}
+
+		end := d + length
+		if offset > d || end > len(dst) {
+			return nil, ErrCorrupt
+		}
+		for ; d < end; d++ {
+			dst[d] = dst[d-offset]
+		}
+	}
+	if d != dLen {
+		return nil, ErrCorrupt
+	}
+	return dst[:d], nil
+}

Godeps/_workspace/src/code.google.com/p/snappy-go/snappy/encode.go

@@ -0,0 +1,174 @@
+// Copyright 2011 The Snappy-Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package snappy
+
+import (
+	"encoding/binary"
+)
+
+// We limit how far copy back-references can go, the same as the C++ code.
+const maxOffset = 1 << 15
+
+// emitLiteral writes a literal chunk and returns the number of bytes written.
+func emitLiteral(dst, lit []byte) int {
+	i, n := 0, uint(len(lit)-1)
+	switch {
+	case n < 60:
+		dst[0] = uint8(n)<<2 | tagLiteral
+		i = 1
+	case n < 1<<8:
+		dst[0] = 60<<2 | tagLiteral
+		dst[1] = uint8(n)
+		i = 2
+	case n < 1<<16:
+		dst[0] = 61<<2 | tagLiteral
+		dst[1] = uint8(n)
+		dst[2] = uint8(n >> 8)
+		i = 3
+	case n < 1<<24:
+		dst[0] = 62<<2 | tagLiteral
+		dst[1] = uint8(n)
+		dst[2] = uint8(n >> 8)
+		dst[3] = uint8(n >> 16)
+		i = 4
+	case int64(n) < 1<<32:
+		dst[0] = 63<<2 | tagLiteral
+		dst[1] = uint8(n)
+		dst[2] = uint8(n >> 8)
+		dst[3] = uint8(n >> 16)
+		dst[4] = uint8(n >> 24)
+		i = 5
+	default:
+		panic("snappy: source buffer is too long")
+	}
+	if copy(dst[i:], lit) != len(lit) {
+		panic("snappy: destination buffer is too short")
+	}
+	return i + len(lit)
+}
+
+// emitCopy writes a copy chunk and returns the number of bytes written.
+func emitCopy(dst []byte, offset, length int) int {
+	i := 0
+	for length > 0 {
+		x := length - 4
+		if 0 <= x && x < 1<<3 && offset < 1<<11 {
+			dst[i+0] = uint8(offset>>8)&0x07<<5 | uint8(x)<<2 | tagCopy1
+			dst[i+1] = uint8(offset)
+			i += 2
+			break
+		}
+
+		x = length
+		if x > 1<<6 {
+			x = 1 << 6
+		}
+		dst[i+0] = uint8(x-1)<<2 | tagCopy2
+		dst[i+1] = uint8(offset)
+		dst[i+2] = uint8(offset >> 8)
+		i += 3
+		length -= x
+	}
+	return i
+}
+
+// Encode returns the encoded form of src. The returned slice may be a sub-
+// slice of dst if dst was large enough to hold the entire encoded block.
+// Otherwise, a newly allocated slice will be returned.
+// It is valid to pass a nil dst.
+func Encode(dst, src []byte) ([]byte, error) {
+	if n := MaxEncodedLen(len(src)); len(dst) < n {
+		dst = make([]byte, n)
+	}
+
+	// The block starts with the varint-encoded length of the decompressed bytes.
+	d := binary.PutUvarint(dst, uint64(len(src)))
+
+	// Return early if src is short.
+	if len(src) <= 4 {
+		if len(src) != 0 {
+			d += emitLiteral(dst[d:], src)
+		}
+		return dst[:d], nil
+	}
+
+	// Initialize the hash table. Its size ranges from 1<<8 to 1<<14 inclusive.
+	const maxTableSize = 1 << 14
+	shift, tableSize := uint(32-8), 1<<8
+	for tableSize < maxTableSize && tableSize < len(src) {
+		shift--
+		tableSize *= 2
+	}
+	var table [maxTableSize]int
+
+	// Iterate over the source bytes.
+	var (
+		s   int // The iterator position.
+		t   int // The last position with the same hash as s.
+		lit int // The start position of any pending literal bytes.
+	)
+	for s+3 < len(src) {
+		// Update the hash table.
+		b0, b1, b2, b3 := src[s], src[s+1], src[s+2], src[s+3]
+		h := uint32(b0) | uint32(b1)<<8 | uint32(b2)<<16 | uint32(b3)<<24
+		p := &table[(h*0x1e35a7bd)>>shift]
+		// We need to to store values in [-1, inf) in table. To save
+		// some initialization time, (re)use the table's zero value
+		// and shift the values against this zero: add 1 on writes,
+		// subtract 1 on reads.
+		t, *p = *p-1, s+1
+		// If t is invalid or src[s:s+4] differs from src[t:t+4], accumulate a literal byte.
+		if t < 0 || s-t >= maxOffset || b0 != src[t] || b1 != src[t+1] || b2 != src[t+2] || b3 != src[t+3] {
+			s++
+			continue
+		}
+		// Otherwise, we have a match. First, emit any pending literal bytes.
+		if lit != s {
+			d += emitLiteral(dst[d:], src[lit:s])
+		}
+		// Extend the match to be as long as possible.
+		s0 := s
+		s, t = s+4, t+4
+		for s < len(src) && src[s] == src[t] {
+			s++
+			t++
+		}
+		// Emit the copied bytes.
+		d += emitCopy(dst[d:], s-t, s-s0)
+		lit = s
+	}
+
+	// Emit any final pending literal bytes and return.
+	if lit != len(src) {
+		d += emitLiteral(dst[d:], src[lit:])
+	}
+	return dst[:d], nil
+}
+
+// MaxEncodedLen returns the maximum length of a snappy block, given its
+// uncompressed length.
+func MaxEncodedLen(srcLen int) int {
+	// Compressed data can be defined as:
+	//    compressed := item* literal*
+	//    item       := literal* copy
+	//
+	// The trailing literal sequence has a space blowup of at most 62/60
+	// since a literal of length 60 needs one tag byte + one extra byte
+	// for length information.
+	//
+	// Item blowup is trickier to measure. Suppose the "copy" op copies
+	// 4 bytes of data. Because of a special check in the encoding code,
+	// we produce a 4-byte copy only if the offset is < 65536. Therefore
+	// the copy op takes 3 bytes to encode, and this type of item leads
+	// to at most the 62/60 blowup for representing literals.
+	//
+	// Suppose the "copy" op copies 5 bytes of data. If the offset is big
+	// enough, it will take 5 bytes to encode the copy op. Therefore the
+	// worst case here is a one-byte literal followed by a five-byte copy.
+	// That is, 6 bytes of input turn into 7 bytes of "compressed" data.
+	//
+	// This last factor dominates the blowup, so the final estimate is:
+	return 32 + srcLen + srcLen/6
+}

Godeps/_workspace/src/code.google.com/p/snappy-go/snappy/snappy.go

@@ -0,0 +1,38 @@
+// Copyright 2011 The Snappy-Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package snappy implements the snappy block-based compression format.
+// It aims for very high speeds and reasonable compression.
+//
+// The C++ snappy implementation is at http://code.google.com/p/snappy/
+package snappy
+
+/*
+Each encoded block begins with the varint-encoded length of the decoded data,
+followed by a sequence of chunks. Chunks begin and end on byte boundaries. The
+first byte of each chunk is broken into its 2 least and 6 most significant bits
+called l and m: l ranges in [0, 4) and m ranges in [0, 64). l is the chunk tag.
+Zero means a literal tag. All other values mean a copy tag.
+
+For literal tags:
+  - If m < 60, the next 1 + m bytes are literal bytes.
+  - Otherwise, let n be the little-endian unsigned integer denoted by the next
+    m - 59 bytes. The next 1 + n bytes after that are literal bytes.
+
+For copy tags, length bytes are copied from offset bytes ago, in the style of
+Lempel-Ziv compression algorithms. In particular:
+  - For l == 1, the offset ranges in [0, 1<<11) and the length in [4, 12).
+    The length is 4 + the low 3 bits of m. The high 3 bits of m form bits 8-10
+    of the offset. The next byte is bits 0-7 of the offset.
+  - For l == 2, the offset ranges in [0, 1<<16) and the length in [1, 65).
+    The length is 1 + m. The offset is the little-endian unsigned integer
+    denoted by the next 2 bytes.
+  - For l == 3, this tag is a legacy format that is no longer supported.
+*/
+const (
+	tagLiteral = 0x00
+	tagCopy1   = 0x01
+	tagCopy2   = 0x02
+	tagCopy4   = 0x03
+)

Godeps/_workspace/src/code.google.com/p/snappy-go/snappy/snappy_test.go

@@ -0,0 +1,261 @@
+// Copyright 2011 The Snappy-Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package snappy
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"math/rand"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+var download = flag.Bool("download", false, "If true, download any missing files before running benchmarks")
+
+func roundtrip(b, ebuf, dbuf []byte) error {
+	e, err := Encode(ebuf, b)
+	if err != nil {
+		return fmt.Errorf("encoding error: %v", err)
+	}
+	d, err := Decode(dbuf, e)
+	if err != nil {
+		return fmt.Errorf("decoding error: %v", err)
+	}
+	if !bytes.Equal(b, d) {
+		return fmt.Errorf("roundtrip mismatch:\n\twant %v\n\tgot  %v", b, d)
+	}
+	return nil
+}
+
+func TestEmpty(t *testing.T) {
+	if err := roundtrip(nil, nil, nil); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestSmallCopy(t *testing.T) {
+	for _, ebuf := range [][]byte{nil, make([]byte, 20), make([]byte, 64)} {
+		for _, dbuf := range [][]byte{nil, make([]byte, 20), make([]byte, 64)} {
+			for i := 0; i < 32; i++ {
+				s := "aaaa" + strings.Repeat("b", i) + "aaaabbbb"
+				if err := roundtrip([]byte(s), ebuf, dbuf); err != nil {
+					t.Errorf("len(ebuf)=%d, len(dbuf)=%d, i=%d: %v", len(ebuf), len(dbuf), i, err)
+				}
+			}
+		}
+	}
+}
+
+func TestSmallRand(t *testing.T) {
+	rand.Seed(27354294)
+	for n := 1; n < 20000; n += 23 {
+		b := make([]byte, n)
+		for i, _ := range b {
+			b[i] = uint8(rand.Uint32())
+		}
+		if err := roundtrip(b, nil, nil); err != nil {
+			t.Fatal(err)
+		}
+	}
+}
+
+func TestSmallRegular(t *testing.T) {
+	for n := 1; n < 20000; n += 23 {
+		b := make([]byte, n)
+		for i, _ := range b {
+			b[i] = uint8(i%10 + 'a')
+		}
+		if err := roundtrip(b, nil, nil); err != nil {
+			t.Fatal(err)
+		}
+	}
+}
+
+func benchDecode(b *testing.B, src []byte) {
+	encoded, err := Encode(nil, src)
+	if err != nil {
+		b.Fatal(err)
+	}
+	// Bandwidth is in amount of uncompressed data.
+	b.SetBytes(int64(len(src)))
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		Decode(src, encoded)
+	}
+}
+
+func benchEncode(b *testing.B, src []byte) {
+	// Bandwidth is in amount of uncompressed data.
+	b.SetBytes(int64(len(src)))
+	dst := make([]byte, MaxEncodedLen(len(src)))
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		Encode(dst, src)
+	}
+}
+
+func readFile(b *testing.B, filename string) []byte {
+	src, err := ioutil.ReadFile(filename)
+	if err != nil {
+		b.Fatalf("failed reading %s: %s", filename, err)
+	}
+	if len(src) == 0 {
+		b.Fatalf("%s has zero length", filename)
+	}
+	return src
+}
+
+// expand returns a slice of length n containing repeated copies of src.
+func expand(src []byte, n int) []byte {
+	dst := make([]byte, n)
+	for x := dst; len(x) > 0; {
+		i := copy(x, src)
+		x = x[i:]
+	}
+	return dst
+}
+
+func benchWords(b *testing.B, n int, decode bool) {
+	// Note: the file is OS-language dependent so the resulting values are not
+	// directly comparable for non-US-English OS installations.
+	data := expand(readFile(b, "/usr/share/dict/words"), n)
+	if decode {
+		benchDecode(b, data)
+	} else {
+		benchEncode(b, data)
+	}
+}
+
+func BenchmarkWordsDecode1e3(b *testing.B) { benchWords(b, 1e3, true) }
+func BenchmarkWordsDecode1e4(b *testing.B) { benchWords(b, 1e4, true) }
+func BenchmarkWordsDecode1e5(b *testing.B) { benchWords(b, 1e5, true) }
+func BenchmarkWordsDecode1e6(b *testing.B) { benchWords(b, 1e6, true) }
+func BenchmarkWordsEncode1e3(b *testing.B) { benchWords(b, 1e3, false) }
+func BenchmarkWordsEncode1e4(b *testing.B) { benchWords(b, 1e4, false) }
+func BenchmarkWordsEncode1e5(b *testing.B) { benchWords(b, 1e5, false) }
+func BenchmarkWordsEncode1e6(b *testing.B) { benchWords(b, 1e6, false) }
+
+// testFiles' values are copied directly from
+// https://code.google.com/p/snappy/source/browse/trunk/snappy_unittest.cc.
+// The label field is unused in snappy-go.
+var testFiles = []struct {
+	label    string
+	filename string
+}{
+	{"html", "html"},
+	{"urls", "urls.10K"},
+	{"jpg", "house.jpg"},
+	{"pdf", "mapreduce-osdi-1.pdf"},
+	{"html4", "html_x_4"},
+	{"cp", "cp.html"},
+	{"c", "fields.c"},
+	{"lsp", "grammar.lsp"},
+	{"xls", "kennedy.xls"},
+	{"txt1", "alice29.txt"},
+	{"txt2", "asyoulik.txt"},
+	{"txt3", "lcet10.txt"},
+	{"txt4", "plrabn12.txt"},
+	{"bin", "ptt5"},
+	{"sum", "sum"},
+	{"man", "xargs.1"},
+	{"pb", "geo.protodata"},
+	{"gaviota", "kppkn.gtb"},
+}
+
+// The test data files are present at this canonical URL.
+const baseURL = "https://snappy.googlecode.com/svn/trunk/testdata/"
+
+func downloadTestdata(basename string) (errRet error) {
+	filename := filepath.Join("testdata", basename)
+	f, err := os.Create(filename)
+	if err != nil {
+		return fmt.Errorf("failed to create %s: %s", filename, err)
+	}
+	defer f.Close()
+	defer func() {
+		if errRet != nil {
+			os.Remove(filename)
+		}
+	}()
+	resp, err := http.Get(baseURL + basename)
+	if err != nil {
+		return fmt.Errorf("failed to download %s: %s", baseURL+basename, err)
+	}
+	defer resp.Body.Close()
+	_, err = io.Copy(f, resp.Body)
+	if err != nil {
+		return fmt.Errorf("failed to write %s: %s", filename, err)
+	}
+	return nil
+}
+
+func benchFile(b *testing.B, n int, decode bool) {
+	filename := filepath.Join("testdata", testFiles[n].filename)
+	if stat, err := os.Stat(filename); err != nil || stat.Size() == 0 {
+		if !*download {
+			b.Fatal("test data not found; skipping benchmark without the -download flag")
+		}
+		// Download the official snappy C++ implementation reference test data
+		// files for benchmarking.
+		if err := os.Mkdir("testdata", 0777); err != nil && !os.IsExist(err) {
+			b.Fatalf("failed to create testdata: %s", err)
+		}
+		for _, tf := range testFiles {
+			if err := downloadTestdata(tf.filename); err != nil {
+				b.Fatalf("failed to download testdata: %s", err)
+			}
+		}
+	}
+	data := readFile(b, filename)
+	if decode {
+		benchDecode(b, data)
+	} else {
+		benchEncode(b, data)
+	}
+}
+
+// Naming convention is kept similar to what snappy's C++ implementation uses.
+func Benchmark_UFlat0(b *testing.B)  { benchFile(b, 0, true) }
+func Benchmark_UFlat1(b *testing.B)  { benchFile(b, 1, true) }
+func Benchmark_UFlat2(b *testing.B)  { benchFile(b, 2, true) }
+func Benchmark_UFlat3(b *testing.B)  { benchFile(b, 3, true) }
+func Benchmark_UFlat4(b *testing.B)  { benchFile(b, 4, true) }
+func Benchmark_UFlat5(b *testing.B)  { benchFile(b, 5, true) }
+func Benchmark_UFlat6(b *testing.B)  { benchFile(b, 6, true) }
+func Benchmark_UFlat7(b *testing.B)  { benchFile(b, 7, true) }
+func Benchmark_UFlat8(b *testing.B)  { benchFile(b, 8, true) }
+func Benchmark_UFlat9(b *testing.B)  { benchFile(b, 9, true) }
+func Benchmark_UFlat10(b *testing.B) { benchFile(b, 10, true) }
+func Benchmark_UFlat11(b *testing.B) { benchFile(b, 11, true) }
+func Benchmark_UFlat12(b *testing.B) { benchFile(b, 12, true) }
+func Benchmark_UFlat13(b *testing.B) { benchFile(b, 13, true) }
+func Benchmark_UFlat14(b *testing.B) { benchFile(b, 14, true) }
+func Benchmark_UFlat15(b *testing.B) { benchFile(b, 15, true) }
+func Benchmark_UFlat16(b *testing.B) { benchFile(b, 16, true) }
+func Benchmark_UFlat17(b *testing.B) { benchFile(b, 17, true) }
+func Benchmark_ZFlat0(b *testing.B)  { benchFile(b, 0, false) }
+func Benchmark_ZFlat1(b *testing.B)  { benchFile(b, 1, false) }
+func Benchmark_ZFlat2(b *testing.B)  { benchFile(b, 2, false) }
+func Benchmark_ZFlat3(b *testing.B)  { benchFile(b, 3, false) }
+func Benchmark_ZFlat4(b *testing.B)  { benchFile(b, 4, false) }
+func Benchmark_ZFlat5(b *testing.B)  { benchFile(b, 5, false) }
+func Benchmark_ZFlat6(b *testing.B)  { benchFile(b, 6, false) }
+func Benchmark_ZFlat7(b *testing.B)  { benchFile(b, 7, false) }
+func Benchmark_ZFlat8(b *testing.B)  { benchFile(b, 8, false) }
+func Benchmark_ZFlat9(b *testing.B)  { benchFile(b, 9, false) }
+func Benchmark_ZFlat10(b *testing.B) { benchFile(b, 10, false) }
+func Benchmark_ZFlat11(b *testing.B) { benchFile(b, 11, false) }
+func Benchmark_ZFlat12(b *testing.B) { benchFile(b, 12, false) }
+func Benchmark_ZFlat13(b *testing.B) { benchFile(b, 13, false) }
+func Benchmark_ZFlat14(b *testing.B) { benchFile(b, 14, false) }
+func Benchmark_ZFlat15(b *testing.B) { benchFile(b, 15, false) }
+func Benchmark_ZFlat16(b *testing.B) { benchFile(b, 16, false) }
+func Benchmark_ZFlat17(b *testing.B) { benchFile(b, 17, false) }

Godeps/_workspace/src/github.com/ethereum/serpent-go/.gitignore

@@ -0,0 +1,5 @@
+/tmp
+*/**/*un~
+*un~
+.DS_Store
+*/**/.DS_Store

Godeps/_workspace/src/github.com/ethereum/serpent-go/.gitmodules

@@ -0,0 +1,3 @@
+[submodule "serp"]
+	path = serpent
+	url = https://github.com/ethereum/serpent.git

Godeps/_workspace/src/github.com/ethereum/serpent-go/README.md

@@ -0,0 +1,12 @@
+[serpent](https://github.com/ethereum/serpent) go bindings.
+
+## Build instructions
+
+```
+go get -d github.com/ethereum/serpent-go
+cd $GOPATH/src/github.com/ethereum/serpent-go
+git submodule init
+git submodule update
+```
+
+You're now ready to go :-)

Godeps/_workspace/src/github.com/ethereum/serpent-go/all.cpp

@@ -0,0 +1,16 @@
+#include "serpent/bignum.cpp"
+#include "serpent/util.cpp"
+#include "serpent/tokenize.cpp"
+#include "serpent/parser.cpp"
+#include "serpent/compiler.cpp"
+#include "serpent/funcs.cpp"
+#include "serpent/lllparser.cpp"
+#include "serpent/rewriter.cpp"
+
+#include "serpent/opcodes.cpp"
+#include "serpent/optimize.cpp"
+#include "serpent/functions.cpp"
+#include "serpent/preprocess.cpp"
+#include "serpent/rewriteutils.cpp"
+
+#include "cpp/api.cpp"

Godeps/_workspace/src/github.com/ethereum/serpent-go/cpp/api.cpp

@@ -0,0 +1,26 @@
+#include <string>
+
+#include "serpent/lllparser.h"
+#include "serpent/bignum.h"
+#include "serpent/util.h"
+#include "serpent/tokenize.h"
+#include "serpent/parser.h"
+#include "serpent/compiler.h"
+
+#include "cpp/api.h"
+
+const char *compileGo(char *code, int *err)
+{
+    try {
+        std::string c = binToHex(compile(std::string(code)));
+
+        return c.c_str();
+    }
+    catch(std::string &error) {
+        *err = 1;
+        return error.c_str();
+    }
+    catch(...) {
+        return "Unknown error";
+    }
+}

Godeps/_workspace/src/github.com/ethereum/serpent-go/cpp/api.h

@@ -0,0 +1,14 @@
+#ifndef CPP_API_H
+#define CPP_API_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const char *compileGo(char *code, int *err);
+
+#ifdef __cplusplus
+}
+#endif
+ 
+#endif

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent.go

@@ -0,0 +1,27 @@
+package serpent
+
+// #cgo CXXFLAGS: -I. -Ilangs/ -std=c++0x -Wall -fno-strict-aliasing
+// #cgo LDFLAGS: -lstdc++
+//
+// #include "cpp/api.h"
+//
+import "C"
+
+import (
+	"encoding/hex"
+	"errors"
+	"unsafe"
+)
+
+func Compile(str string) ([]byte, error) {
+	var err C.int
+	out := C.GoString(C.compileGo(C.CString(str), (*C.int)(unsafe.Pointer(&err))))
+
+	if err == C.int(1) {
+		return nil, errors.New(out)
+	}
+
+	bytes, _ := hex.DecodeString(out)
+
+	return bytes, nil
+}

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/.gitignore

@@ -0,0 +1,12 @@
+[._]*.s[a-w][a-z]
+[._]s[a-w][a-z]
+*.un~
+Session.vim
+.netrwhist
+*~
+*.o
+serpent
+libserpent.a
+pyserpent.so
+dist
+*.egg-info

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/MANIFEST.in

@@ -0,0 +1,5 @@
+include *.cpp
+include *.h
+include *py
+include README.md
+include Makefile

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/Makefile

@@ -0,0 +1,55 @@
+PLATFORM_OPTS = 
+PYTHON = /usr/include/python2.7
+CXXFLAGS = -fPIC
+# -g3 -O0
+BOOST_INC = /usr/include
+BOOST_LIB = /usr/lib
+TARGET = pyserpent
+COMMON_OBJS = bignum.o util.o tokenize.o lllparser.o parser.o opcodes.o optimize.o functions.o rewriteutils.o preprocess.o rewriter.o compiler.o funcs.o
+HEADERS = bignum.h util.h tokenize.h lllparser.h parser.h opcodes.h functions.h optimize.h rewriteutils.h preprocess.h rewriter.h compiler.h funcs.h
+PYTHON_VERSION = 2.7
+
+serpent : serpentc lib
+
+lib:
+	ar rvs libserpent.a $(COMMON_OBJS) 
+	g++ $(CXXFLAGS) -shared $(COMMON_OBJS) -o libserpent.so
+
+serpentc: $(COMMON_OBJS) cmdline.o
+	rm -rf serpent
+	g++ -Wall $(COMMON_OBJS) cmdline.o -o serpent
+
+bignum.o : bignum.cpp bignum.h
+
+opcodes.o : opcodes.cpp opcodes.h
+
+util.o : util.cpp util.h bignum.o
+
+tokenize.o : tokenize.cpp tokenize.h util.o
+
+lllparser.o : lllparser.cpp lllparser.h tokenize.o util.o
+
+parser.o : parser.cpp parser.h tokenize.o util.o
+
+rewriter.o : rewriter.cpp rewriter.h lllparser.o util.o rewriteutils.o preprocess.o opcodes.o functions.o
+
+preprocessor.o: rewriteutils.o functions.o
+
+compiler.o : compiler.cpp compiler.h util.o
+
+funcs.o : funcs.cpp funcs.h
+
+cmdline.o: cmdline.cpp
+
+pyext.o: pyext.cpp
+
+clean:
+	rm -f serpent *\.o libserpent.a libserpent.so
+
+install:
+	cp serpent /usr/local/bin
+	cp libserpent.a /usr/local/lib
+	cp libserpent.so /usr/local/lib
+	rm -rf /usr/local/include/libserpent
+	mkdir -p /usr/local/include/libserpent
+	cp $(HEADERS) /usr/local/include/libserpent

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/README.md

@@ -0,0 +1,3 @@
+Installation:
+
+```make && sudo make install```

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/bignum.cpp

@@ -0,0 +1,112 @@
+#include <stdio.h>
+#include <iostream>
+#include <vector>
+#include <map>
+#include "bignum.h"
+
+//Integer to string conversion
+std::string unsignedToDecimal(unsigned branch) {
+    if (branch < 10) return nums.substr(branch, 1);
+    else return unsignedToDecimal(branch / 10) + nums.substr(branch % 10,1);
+}
+
+//Add two strings representing decimal values
+std::string decimalAdd(std::string a, std::string b) {
+    std::string o = a;
+    while (b.length() < a.length()) b = "0" + b;
+    while (o.length() < b.length()) o = "0" + o;
+    bool carry = false;
+    for (int i = o.length() - 1; i >= 0; i--) {
+        o[i] = o[i] + b[i] - '0';
+        if (carry) o[i]++;
+        if (o[i] > '9') {
+            o[i] -= 10;
+            carry = true;
+        }
+        else carry = false;
+    }
+    if (carry) o = "1" + o;
+    return o;
+}
+
+//Helper function for decimalMul
+std::string decimalDigitMul(std::string a, int dig) {
+    if (dig == 0) return "0";
+    else return decimalAdd(a, decimalDigitMul(a, dig - 1));
+}
+
+//Multiply two strings representing decimal values
+std::string decimalMul(std::string a, std::string b) {
+    std::string o = "0";
+	for (unsigned i = 0; i < b.length(); i++) {
+        std::string n = decimalDigitMul(a, b[i] - '0');
+        if (n != "0") {
+			for (unsigned j = i + 1; j < b.length(); j++) n += "0";
+        }
+        o = decimalAdd(o, n);
+    }
+    return o;
+}
+
+//Modexp
+std::string decimalModExp(std::string b, std::string e, std::string m) {
+    if (e == "0") return "1";
+    else if (e == "1") return b;
+    else if (decimalMod(e, "2") == "0") {
+        std::string o = decimalModExp(b, decimalDiv(e, "2"), m);
+        return decimalMod(decimalMul(o, o), m);
+    }
+    else {
+        std::string o = decimalModExp(b, decimalDiv(e, "2"), m);
+        return decimalMod(decimalMul(decimalMul(o, o), b), m);
+    }
+}
+
+//Is a greater than b? Flag allows equality
+bool decimalGt(std::string a, std::string b, bool eqAllowed) {
+    if (a == b) return eqAllowed;
+    return (a.length() > b.length()) || (a.length() >= b.length() && a > b);
+}
+
+//Subtract the two strings representing decimal values
+std::string decimalSub(std::string a, std::string b) {
+    if (b == "0") return a;
+    if (b == a) return "0";
+    while (b.length() < a.length()) b = "0" + b;
+    std::string c = b;
+	for (unsigned i = 0; i < c.length(); i++) c[i] = '0' + ('9' - c[i]);
+    std::string o = decimalAdd(decimalAdd(a, c).substr(1), "1");
+    while (o.size() > 1 && o[0] == '0') o = o.substr(1);
+    return o;
+}
+
+//Divide the two strings representing decimal values
+std::string decimalDiv(std::string a, std::string b) {
+    std::string c = b;
+    if (decimalGt(c, a)) return "0";
+    int zeroes = -1;
+    while (decimalGt(a, c, true)) {
+        zeroes += 1;
+        c = c + "0";
+    }
+    c = c.substr(0, c.size() - 1);
+    std::string quot = "0";
+    while (decimalGt(a, c, true)) {
+        a = decimalSub(a, c);
+        quot = decimalAdd(quot, "1");
+    }
+    for (int i = 0; i < zeroes; i++) quot += "0";
+    return decimalAdd(quot, decimalDiv(a, b));
+}
+
+//Modulo the two strings representing decimal values
+std::string decimalMod(std::string a, std::string b) {
+    return decimalSub(a, decimalMul(decimalDiv(a, b), b));
+}
+
+//String to int conversion
+unsigned decimalToUnsigned(std::string a) {
+    if (a.size() == 0) return 0;
+    else return (a[a.size() - 1] - '0') 
+        + decimalToUnsigned(a.substr(0,a.size()-1)) * 10;
+}

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/bignum.h

@@ -0,0 +1,41 @@
+#ifndef ETHSERP_BIGNUM
+#define ETHSERP_BIGNUM
+
+const std::string nums = "0123456789";
+
+const std::string tt256 = 
+"115792089237316195423570985008687907853269984665640564039457584007913129639936"
+;
+
+const std::string tt256m1 = 
+"115792089237316195423570985008687907853269984665640564039457584007913129639935"
+;
+
+const std::string tt255 =
+"57896044618658097711785492504343953926634992332820282019728792003956564819968";
+
+const std::string tt176 =
+"95780971304118053647396689196894323976171195136475136";
+
+std::string unsignedToDecimal(unsigned branch);
+
+std::string decimalAdd(std::string a, std::string b);
+
+std::string decimalMul(std::string a, std::string b);
+
+std::string decimalSub(std::string a, std::string b);
+
+std::string decimalDiv(std::string a, std::string b);
+
+std::string decimalMod(std::string a, std::string b);
+
+std::string decimalModExp(std::string b, std::string e, std::string m);
+
+bool decimalGt(std::string a, std::string b, bool eqAllowed=false);
+
+unsigned decimalToUnsigned(std::string a);
+
+#define utd unsignedToDecimal
+#define dtu decimalToUnsigned
+
+#endif

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/cmdline.cpp

@@ -0,0 +1,132 @@
+#include <stdio.h>
+#include <string>
+#include <iostream>
+#include <vector>
+#include <map>
+#include "funcs.h"
+
+int main(int argv, char** argc) {
+    if (argv == 1) {
+        std::cerr << "Must provide a command and arguments! Try parse, rewrite, compile, assemble\n";
+        return 0;
+    }
+    if (argv == 2 && std::string(argc[1]) == "--help" || std::string(argc[1]) == "-h" ) {
+        std::cout << argc[1] << "\n";
+        
+        std::cout << "serpent command input\n";
+        std::cout << "where input -s for from stdin, a file, or interpreted as serpent code if does not exist as file.";
+        std::cout << "where command: \n";
+        std::cout << " parse:          Just parses and returns s-expression code.\n";
+        std::cout << " rewrite:        Parse, use rewrite rules print s-expressions of result.\n";
+        std::cout << " compile:        Return resulting compiled EVM code in hex.\n";
+        std::cout << " assemble:       Return result from step before compilation.\n";
+        return 0;
+    }
+        
+    std::string flag = "";
+    std::string command = argc[1];
+    std::string input;
+    std::string secondInput;
+    if (std::string(argc[1]) == "-s") {
+        flag = command.substr(1);
+        command = argc[2];
+        input = "";
+        std::string line;
+        while (std::getline(std::cin, line)) {
+            input += line + "\n";
+        }
+        secondInput = argv == 3 ? "" : argc[3];
+    }
+    else {
+        if (argv == 2) {
+            std::cerr << "Not enough arguments for serpent cmdline\n";
+            throw(0);
+        }
+        input = argc[2];
+        secondInput = argv == 3 ? "" : argc[3];
+    }
+    bool haveSec = secondInput.length() > 0;
+    if (command == "parse" || command == "parse_serpent") {
+        std::cout << printAST(parseSerpent(input), haveSec) << "\n";
+    }
+    else if (command == "rewrite") {
+        std::cout << printAST(rewrite(parseLLL(input, true)), haveSec) << "\n";
+    }
+    else if (command == "compile_to_lll") {
+        std::cout << printAST(compileToLLL(input), haveSec) << "\n";
+    }
+    else if (command == "rewrite_chunk") {
+        std::cout << printAST(rewriteChunk(parseLLL(input, true)), haveSec) << "\n";
+    }
+    else if (command == "compile_chunk_to_lll") {
+        std::cout << printAST(compileChunkToLLL(input), haveSec) << "\n";
+    }
+    else if (command == "build_fragtree") {
+        std::cout << printAST(buildFragmentTree(parseLLL(input, true))) << "\n";
+    }
+    else if (command == "compile_lll") {
+        std::cout << binToHex(compileLLL(parseLLL(input, true))) << "\n";
+    }
+    else if (command == "dereference") {
+        std::cout << printAST(dereference(parseLLL(input, true)), haveSec) <<"\n";
+    }
+    else if (command == "pretty_assemble") {
+        std::cout << printTokens(prettyAssemble(parseLLL(input, true))) <<"\n";
+    }
+    else if (command == "pretty_compile_lll") {
+        std::cout << printTokens(prettyCompileLLL(parseLLL(input, true))) << "\n";
+    }
+    else if (command == "pretty_compile") {
+        std::cout << printTokens(prettyCompile(input)) << "\n";
+    }
+    else if (command == "pretty_compile_chunk") {
+        std::cout << printTokens(prettyCompileChunk(input)) << "\n";
+    }
+    else if (command == "assemble") {
+        std::cout << assemble(parseLLL(input, true)) << "\n";
+    }
+    else if (command == "serialize") {
+        std::cout << binToHex(serialize(tokenize(input, Metadata(), false))) << "\n";
+    }
+    else if (command == "flatten") {
+        std::cout << printTokens(flatten(parseLLL(input, true))) << "\n";
+    }
+    else if (command == "deserialize") {
+        std::cout << printTokens(deserialize(hexToBin(input))) << "\n";
+    }
+    else if (command == "compile") {
+        std::cout << binToHex(compile(input)) << "\n";
+    }
+    else if (command == "compile_chunk") {
+        std::cout << binToHex(compileChunk(input)) << "\n";
+    }
+    else if (command == "encode_datalist") {
+        std::vector<Node> tokens = tokenize(input);
+        std::vector<std::string> o;
+        for (int i = 0; i < (int)tokens.size(); i++) {
+            o.push_back(tokens[i].val);
+        }
+        std::cout << binToHex(encodeDatalist(o)) << "\n";
+    }
+    else if (command == "decode_datalist") {
+        std::vector<std::string> o = decodeDatalist(hexToBin(input));
+        std::vector<Node> tokens;
+        for (int i = 0; i < (int)o.size(); i++)
+            tokens.push_back(token(o[i]));
+        std::cout << printTokens(tokens) << "\n";
+    }
+    else if (command == "tokenize") {
+        std::cout << printTokens(tokenize(input));
+    }
+    else if (command == "biject") {
+        if (argv == 3)
+             std::cerr << "Not enough arguments for biject\n";
+        int pos = decimalToUnsigned(secondInput);
+        std::vector<Node> n = prettyCompile(input);
+        if (pos >= (int)n.size())
+             std::cerr << "Code position too high\n";
+        Metadata m = n[pos].metadata;
+        std::cout << "Opcode: " << n[pos].val << ", file: " << m.file << 
+             ", line: " << m.ln << ", char: " << m.ch << "\n";
+    }
+}

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/compiler.cpp

@@ -0,0 +1,554 @@
+#include <stdio.h>
+#include <iostream>
+#include <vector>
+#include <map>
+#include "util.h"
+#include "bignum.h"
+#include "opcodes.h"
+
+struct programAux {
+    std::map<std::string, std::string> vars;
+    int nextVarMem;
+    bool allocUsed;
+    bool calldataUsed;
+    int step;
+    int labelLength;
+};
+
+struct programVerticalAux {
+    int height;
+    std::string innerScopeName;
+    std::map<std::string, int> dupvars;
+    std::map<std::string, int> funvars;
+    std::vector<mss> scopes;
+};
+
+struct programData {
+    programAux aux;
+    Node code;
+    int outs;
+};
+
+programAux Aux() {
+    programAux o;
+    o.allocUsed = false;
+    o.calldataUsed = false;
+    o.step = 0;
+    o.nextVarMem = 32;
+    return o;
+}
+
+programVerticalAux verticalAux() {
+    programVerticalAux o;
+    o.height = 0;
+    o.dupvars = std::map<std::string, int>();
+    o.funvars = std::map<std::string, int>();
+    o.scopes = std::vector<mss>();
+    return o;
+}
+
+programData pd(programAux aux = Aux(), Node code=token("_"), int outs=0) {
+    programData o;
+    o.aux = aux;
+    o.code = code;
+    o.outs = outs;
+    return o;
+}
+
+Node multiToken(Node nodes[], int len, Metadata met) {
+    std::vector<Node> out;
+    for (int i = 0; i < len; i++) {
+        out.push_back(nodes[i]);
+    }
+    return astnode("_", out, met);
+}
+
+Node finalize(programData c);
+
+Node popwrap(Node node) {
+    Node nodelist[] = {
+        node,
+        token("POP", node.metadata)
+    };
+    return multiToken(nodelist, 2, node.metadata);
+}
+
+// Grabs variables
+mss getVariables(Node node, mss cur=mss()) {
+    Metadata m = node.metadata;
+    // Tokens don't contain any variables
+    if (node.type == TOKEN)
+        return cur;
+    // Don't descend into call fragments
+    else if (node.val == "lll")
+        return getVariables(node.args[1], cur);
+    // At global scope get/set/ref also declare    
+    else if (node.val == "get" || node.val == "set" || node.val == "ref") {
+        if (node.args[0].type != TOKEN)
+            err("Variable name must be simple token,"
+                " not complex expression!", m);
+        if (!cur.count(node.args[0].val)) {
+            cur[node.args[0].val] = utd(cur.size() * 32 + 32);
+            //std::cerr << node.args[0].val << " " << cur[node.args[0].val] << "\n";
+        }
+    }
+    // Recursively process children
+    for (unsigned i = 0; i < node.args.size(); i++) {
+        cur = getVariables(node.args[i], cur);
+    }
+    return cur;
+}
+
+// Turns LLL tree into tree of code fragments
+programData opcodeify(Node node,
+                      programAux aux=Aux(),
+                      programVerticalAux vaux=verticalAux()) {
+    std::string symb = "_"+mkUniqueToken();
+    Metadata m = node.metadata;
+    // Get variables
+    if (!aux.vars.size()) {
+        aux.vars = getVariables(node);
+        aux.nextVarMem = aux.vars.size() * 32 + 32;
+    }
+    // Numbers
+    if (node.type == TOKEN) {
+        return pd(aux, nodeToNumeric(node), 1);
+    }
+    else if (node.val == "ref" || node.val == "get" || node.val == "set") {
+        std::string varname = node.args[0].val;
+        // Determine reference to variable
+        Node varNode = tkn(aux.vars[varname], m);
+        //std::cerr << varname << " " << printSimple(varNode) << "\n";
+        // Set variable
+        if (node.val == "set") {
+            programData sub = opcodeify(node.args[1], aux, vaux);
+            if (!sub.outs)
+                err("Value to set variable must have nonzero arity!", m);
+            // What if we are setting a stack variable?
+            if (vaux.dupvars.count(node.args[0].val)) {
+                int h = vaux.height - vaux.dupvars[node.args[0].val];
+                if (h > 16) err("Too deep for stack variable (max 16)", m);
+                Node nodelist[] = {
+                    sub.code,
+                    token("SWAP"+unsignedToDecimal(h), m),
+                    token("POP", m)
+                };
+                return pd(sub.aux, multiToken(nodelist, 3, m), 0);                   
+            }
+            // Setting a memory variable
+            else {
+                Node nodelist[] = {
+                    sub.code,
+                    varNode,
+                    token("MSTORE", m),
+                };
+                return pd(sub.aux, multiToken(nodelist, 3, m), 0);                   
+            }
+        }
+        // Get variable
+        else if (node.val == "get") {
+            // Getting a stack variable
+            if (vaux.dupvars.count(node.args[0].val)) {
+                 int h = vaux.height - vaux.dupvars[node.args[0].val];
+                if (h > 16) err("Too deep for stack variable (max 16)", m);
+                return pd(aux, token("DUP"+unsignedToDecimal(h)), 1);                   
+            }
+            // Getting a memory variable
+            else {
+                Node nodelist[] = 
+                     { varNode, token("MLOAD", m) };
+                return pd(aux, multiToken(nodelist, 2, m), 1);
+            }
+        }
+        // Refer variable
+        else if (node.val == "ref") {
+            if (vaux.dupvars.count(node.args[0].val))
+                err("Cannot ref stack variable!", m);
+            return pd(aux, varNode, 1);
+        }
+    }
+    // Comments do nothing
+    else if (node.val == "comment") {
+        Node nodelist[] = { };
+        return pd(aux, multiToken(nodelist, 0, m), 0);
+    }
+    // Custom operation sequence
+    // eg. (ops bytez id msize swap1 msize add 0 swap1 mstore) == alloc
+    if (node.val == "ops") {
+        std::vector<Node>  subs2;
+        int depth = 0;
+        for (unsigned i = 0; i < node.args.size(); i++) {
+            std::string op = upperCase(node.args[i].val);
+            if (node.args[i].type == ASTNODE || opinputs(op) == -1) {
+                programVerticalAux vaux2 = vaux;
+                vaux2.height = vaux.height - i - 1 + node.args.size();
+                programData sub = opcodeify(node.args[i], aux, vaux2);
+                aux = sub.aux;
+                depth += sub.outs;
+                subs2.push_back(sub.code);
+            }
+            else {
+                subs2.push_back(token(op, m));
+                depth += opoutputs(op) - opinputs(op);
+            }
+        }
+        if (depth < 0 || depth > 1) err("Stack depth mismatch", m);
+        return pd(aux, astnode("_", subs2, m), 0);
+    }
+    // Code blocks
+    if (node.val == "lll" && node.args.size() == 2) {
+        if (node.args[1].val != "0") aux.allocUsed = true;
+        std::vector<Node> o;
+        o.push_back(finalize(opcodeify(node.args[0])));
+        programData sub = opcodeify(node.args[1], aux, vaux);
+        Node code = astnode("____CODE", o, m);
+        Node nodelist[] = {
+            token("$begincode"+symb+".endcode"+symb, m), token("DUP1", m),
+            token("$begincode"+symb, m), sub.code, token("CODECOPY", m),
+            token("$endcode"+symb, m), token("JUMP", m),
+            token("~begincode"+symb, m), code, 
+            token("~endcode"+symb, m), token("JUMPDEST", m)
+        };
+        return pd(sub.aux, multiToken(nodelist, 11, m), 1);
+    }
+    // Stack variables
+    if (node.val == "with") {
+        programData initial = opcodeify(node.args[1], aux, vaux);
+        programVerticalAux vaux2 = vaux;
+        vaux2.dupvars[node.args[0].val] = vaux.height;
+        vaux2.height += 1;
+        if (!initial.outs)
+            err("Initial variable value must have nonzero arity!", m);
+        programData sub = opcodeify(node.args[2], initial.aux, vaux2);
+        Node nodelist[] = {
+            initial.code,
+            sub.code
+        };
+        programData o = pd(sub.aux, multiToken(nodelist, 2, m), sub.outs);
+        if (sub.outs)
+            o.code.args.push_back(token("SWAP1", m));
+        o.code.args.push_back(token("POP", m));
+        return o;
+    }
+    // Seq of multiple statements
+    if (node.val == "seq") {
+        std::vector<Node> children;
+        int lastOut = 0;
+        for (unsigned i = 0; i < node.args.size(); i++) {
+            programData sub = opcodeify(node.args[i], aux, vaux);
+            aux = sub.aux;
+            if (sub.outs == 1) {
+                if (i < node.args.size() - 1) sub.code = popwrap(sub.code);
+                else lastOut = 1;
+            }
+            children.push_back(sub.code);
+        }
+        return pd(aux, astnode("_", children, m), lastOut);
+    }
+    // 2-part conditional (if gets rewritten to unless in rewrites)
+    else if (node.val == "unless" && node.args.size() == 2) {
+        programData cond = opcodeify(node.args[0], aux, vaux);
+        programData action = opcodeify(node.args[1], cond.aux, vaux);
+        aux = action.aux;
+        if (!cond.outs) err("Condition of if/unless statement has arity 0", m);
+        if (action.outs) action.code = popwrap(action.code);
+        Node nodelist[] = {
+            cond.code,
+            token("$endif"+symb, m), token("JUMPI", m),
+            action.code,
+            token("~endif"+symb, m), token("JUMPDEST", m)
+        };
+        return pd(aux, multiToken(nodelist, 6, m), 0);
+    }
+    // 3-part conditional
+    else if (node.val == "if" && node.args.size() == 3) {
+        programData ifd = opcodeify(node.args[0], aux, vaux);
+        programData thend = opcodeify(node.args[1], ifd.aux, vaux);
+        programData elsed = opcodeify(node.args[2], thend.aux, vaux);
+        aux = elsed.aux;
+        if (!ifd.outs)
+            err("Condition of if/unless statement has arity 0", m);
+        // Handle cases where one conditional outputs something
+        // and the other does not
+        int outs = (thend.outs && elsed.outs) ? 1 : 0;
+        if (thend.outs > outs) thend.code = popwrap(thend.code);
+        if (elsed.outs > outs) elsed.code = popwrap(elsed.code);
+        Node nodelist[] = {
+            ifd.code,
+            token("ISZERO", m),
+            token("$else"+symb, m), token("JUMPI", m),
+            thend.code,
+            token("$endif"+symb, m), token("JUMP", m),
+            token("~else"+symb, m), token("JUMPDEST", m),
+            elsed.code,
+            token("~endif"+symb, m), token("JUMPDEST", m)
+        };
+        return pd(aux, multiToken(nodelist, 12, m), outs);
+    }
+    // While (rewritten to this in rewrites)
+    else if (node.val == "until") {
+        programData cond = opcodeify(node.args[0], aux, vaux);
+        programData action = opcodeify(node.args[1], cond.aux, vaux);
+        aux = action.aux;
+        if (!cond.outs)
+            err("Condition of while/until loop has arity 0", m);
+        if (action.outs) action.code = popwrap(action.code);
+        Node nodelist[] = {
+            token("~beg"+symb, m), token("JUMPDEST", m),
+            cond.code,
+            token("$end"+symb, m), token("JUMPI", m),
+            action.code,
+            token("$beg"+symb, m), token("JUMP", m),
+            token("~end"+symb, m), token("JUMPDEST", m),
+        };
+        return pd(aux, multiToken(nodelist, 10, m));
+    }
+    // Memory allocations
+    else if (node.val == "alloc") {
+        programData bytez = opcodeify(node.args[0], aux, vaux);
+        aux = bytez.aux;
+        if (!bytez.outs)
+            err("Alloc input has arity 0", m);
+        aux.allocUsed = true;
+        Node nodelist[] = {
+            bytez.code,
+            token("MSIZE", m), token("SWAP1", m), token("MSIZE", m),
+            token("ADD", m), 
+            token("0", m), token("SWAP1", m), token("MSTORE", m)
+        };
+        return pd(aux, multiToken(nodelist, 8, m), 1);
+    }
+    // All other functions/operators
+    else {
+        std::vector<Node>  subs2;
+        int depth = opinputs(upperCase(node.val));
+        if (depth == -1)
+            err("Not a function or opcode: "+node.val, m);
+        if ((int)node.args.size() != depth)
+            err("Invalid arity for "+node.val, m);
+        for (int i = node.args.size() - 1; i >= 0; i--) {
+            programVerticalAux vaux2 = vaux;
+            vaux2.height = vaux.height - i - 1 + node.args.size();
+            programData sub = opcodeify(node.args[i], aux, vaux2);
+            aux = sub.aux;
+            if (!sub.outs)
+                err("Input "+unsignedToDecimal(i)+" has arity 0", sub.code.metadata);
+            subs2.push_back(sub.code);
+        }
+        subs2.push_back(token(upperCase(node.val), m));
+        int outdepth = opoutputs(upperCase(node.val));
+        return pd(aux, astnode("_", subs2, m), outdepth);
+    }
+}
+
+// Adds necessary wrappers to a program
+Node finalize(programData c) {
+    std::vector<Node> bottom;
+    Metadata m = c.code.metadata;
+    // If we are using both alloc and variables, we need to pre-zfill
+    // some memory
+    if ((c.aux.allocUsed || c.aux.calldataUsed) && c.aux.vars.size() > 0) {
+        Node nodelist[] = {
+            token("0", m), 
+            token(unsignedToDecimal(c.aux.nextVarMem - 1)),
+            token("MSTORE8", m)
+        };
+        bottom.push_back(multiToken(nodelist, 3, m));
+    }
+    // The actual code
+    bottom.push_back(c.code);
+    return astnode("_", bottom, m);
+}
+
+//LLL -> code fragment tree
+Node buildFragmentTree(Node node) {
+    return finalize(opcodeify(node));
+}
+
+
+// Builds a dictionary mapping labels to variable names
+programAux buildDict(Node program, programAux aux, int labelLength) {
+    Metadata m = program.metadata;
+    // Token
+    if (program.type == TOKEN) {
+        if (isNumberLike(program)) {
+            aux.step += 1 + toByteArr(program.val, m).size();
+        }
+        else if (program.val[0] == '~') {
+            aux.vars[program.val.substr(1)] = unsignedToDecimal(aux.step);
+        }
+        else if (program.val[0] == '$') {
+            aux.step += labelLength + 1;
+        }
+        else aux.step += 1;
+    }
+    // A sub-program (ie. LLL)
+    else if (program.val == "____CODE") {
+        programAux auks = Aux();
+        for (unsigned i = 0; i < program.args.size(); i++) {
+            auks = buildDict(program.args[i], auks, labelLength);
+        }
+        for (std::map<std::string,std::string>::iterator it=auks.vars.begin();
+             it != auks.vars.end();
+             it++) {
+            aux.vars[(*it).first] = (*it).second;
+        }
+        aux.step += auks.step;
+    }
+    // Normal sub-block
+    else {
+        for (unsigned i = 0; i < program.args.size(); i++) {
+            aux = buildDict(program.args[i], aux, labelLength);
+        }
+    }
+    return aux;
+}
+
+// Applies that dictionary
+Node substDict(Node program, programAux aux, int labelLength) {
+    Metadata m = program.metadata;
+    std::vector<Node> out;
+    std::vector<Node> inner;
+    if (program.type == TOKEN) {
+        if (program.val[0] == '$') {
+            std::string tokStr = "PUSH"+unsignedToDecimal(labelLength);
+            out.push_back(token(tokStr, m));
+            int dotLoc = program.val.find('.');
+            if (dotLoc == -1) {
+                std::string val = aux.vars[program.val.substr(1)];
+                inner = toByteArr(val, m, labelLength);
+            }
+            else {
+                std::string start = aux.vars[program.val.substr(1, dotLoc-1)],
+                            end = aux.vars[program.val.substr(dotLoc + 1)],
+                            dist = decimalSub(end, start);
+                inner = toByteArr(dist, m, labelLength);
+            }
+            out.push_back(astnode("_", inner, m));
+        }
+        else if (program.val[0] == '~') { }
+        else if (isNumberLike(program)) {
+            inner = toByteArr(program.val, m);
+            out.push_back(token("PUSH"+unsignedToDecimal(inner.size())));
+            out.push_back(astnode("_", inner, m));
+        }
+        else return program;
+    }
+    else {
+        for (unsigned i = 0; i < program.args.size(); i++) {
+            Node n = substDict(program.args[i], aux, labelLength);
+            if (n.type == TOKEN || n.args.size()) out.push_back(n);
+        }
+    }
+    return astnode("_", out, m);
+}
+
+// Compiled fragtree -> compiled fragtree without labels
+Node dereference(Node program) {
+    int sz = treeSize(program) * 4;
+    int labelLength = 1;
+    while (sz >= 256) { labelLength += 1; sz /= 256; }
+    programAux aux = buildDict(program, Aux(), labelLength);
+    return substDict(program, aux, labelLength);
+}
+
+// Dereferenced fragtree -> opcodes
+std::vector<Node> flatten(Node derefed) {
+    std::vector<Node> o;
+    if (derefed.type == TOKEN) {
+        o.push_back(derefed);
+    }
+    else {
+        for (unsigned i = 0; i < derefed.args.size(); i++) {
+            std::vector<Node> oprime = flatten(derefed.args[i]);
+            for (unsigned j = 0; j < oprime.size(); j++) o.push_back(oprime[j]);
+        }
+    }
+    return o;
+}
+
+// Opcodes -> bin
+std::string serialize(std::vector<Node> codons) {
+    std::string o;
+    for (unsigned i = 0; i < codons.size(); i++) {
+        int v;
+        if (isNumberLike(codons[i])) {
+            v = decimalToUnsigned(codons[i].val);
+        }
+        else if (codons[i].val.substr(0,4) == "PUSH") {
+            v = 95 + decimalToUnsigned(codons[i].val.substr(4));
+        }
+        else {
+            v = opcode(codons[i].val);
+        }
+        o += (char)v;
+    }
+    return o;
+}
+
+// Bin -> opcodes
+std::vector<Node> deserialize(std::string ser) {
+    std::vector<Node> o;
+    int backCount = 0;
+    for (unsigned i = 0; i < ser.length(); i++) {
+        unsigned char v = (unsigned char)ser[i];
+        std::string oper = op((int)v);
+        if (oper != "" && backCount <= 0) o.push_back(token(oper));
+        else if (v >= 96 && v < 128 && backCount <= 0) {
+            o.push_back(token("PUSH"+unsignedToDecimal(v - 95)));
+        }
+        else o.push_back(token(unsignedToDecimal(v)));
+        if (v >= 96 && v < 128 && backCount <= 0) {
+            backCount = v - 95;
+        }
+        else backCount--;
+    }
+    return o;
+}
+
+// Fragtree -> bin
+std::string assemble(Node fragTree) {
+    return serialize(flatten(dereference(fragTree)));
+}
+
+// Fragtree -> tokens
+std::vector<Node> prettyAssemble(Node fragTree) {
+    return flatten(dereference(fragTree));
+}
+
+// LLL -> bin
+std::string compileLLL(Node program) {
+    return assemble(buildFragmentTree(program));
+}
+
+// LLL -> tokens
+std::vector<Node> prettyCompileLLL(Node program) {
+    return prettyAssemble(buildFragmentTree(program));
+}
+
+// Converts a list of integer values to binary transaction data
+std::string encodeDatalist(std::vector<std::string> vals) {
+    std::string o;
+    for (unsigned i = 0; i < vals.size(); i++) {
+        std::vector<Node> n = toByteArr(strToNumeric(vals[i]), Metadata(), 32);
+        for (unsigned j = 0; j < n.size(); j++) {
+            int v = decimalToUnsigned(n[j].val);
+            o += (char)v;
+        }
+    }
+    return o;
+}
+
+// Converts binary transaction data into a list of integer values
+std::vector<std::string> decodeDatalist(std::string ser) {
+    std::vector<std::string> out;
+    for (unsigned i = 0; i < ser.length(); i+= 32) {
+        std::string o = "0";
+		for (unsigned j = i; j < i + 32; j++) {
+            int vj = (int)(unsigned char)ser[j];
+            o = decimalAdd(decimalMul(o, "256"), unsignedToDecimal(vj));
+        }
+        out.push_back(o);
+    }
+    return out;
+}

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/compiler.h

@@ -0,0 +1,43 @@
+#ifndef ETHSERP_COMPILER
+#define ETHSERP_COMPILER
+
+#include <stdio.h>
+#include <iostream>
+#include <vector>
+#include <map>
+#include "util.h"
+
+// Compiled fragtree -> compiled fragtree without labels
+Node dereference(Node program);
+
+// LLL -> fragtree
+Node buildFragmentTree(Node program);
+
+// Dereferenced fragtree -> opcodes
+std::vector<Node> flatten(Node derefed);
+
+// opcodes -> bin
+std::string serialize(std::vector<Node> codons);
+
+// Fragtree -> bin
+std::string assemble(Node fragTree);
+
+// Fragtree -> opcodes
+std::vector<Node> prettyAssemble(Node fragTree);
+
+// LLL -> bin
+std::string compileLLL(Node program);
+
+// LLL -> opcodes
+std::vector<Node> prettyCompileLLL(Node program);
+
+// bin -> opcodes
+std::vector<Node> deserialize(std::string ser);
+
+// Converts a list of integer values to binary transaction data
+std::string encodeDatalist(std::vector<std::string> vals);
+
+// Converts binary transaction data into a list of integer values
+std::vector<std::string> decodeDatalist(std::string ser);
+
+#endif

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/example.cpp

@@ -0,0 +1,11 @@
+#include <libserpent/funcs.h>
+#include <libserpent/bignum.h>
+#include <iostream>
+
+using namespace std;
+
+int main() {
+	cout << printAST(compileToLLL(get_file_contents("examples/namecoin.se"))) << "\n";
+    cout << decimalSub("10234", "10234") << "\n";
+    cout << decimalSub("10234", "10233") << "\n";
+}

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/collatz.se

@@ -0,0 +1,11 @@
+x = msg.data[0]
+steps = 0
+
+while x > 1:
+    steps += 1
+    if (x % 2) == 0:
+        x /= 2
+    else:
+        x = 3 * x + 1
+
+return(steps)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/counterparty/counterparty.se

@@ -0,0 +1,274 @@
+# Ethereum forks Counterparty in 340 lines of serpent
+# Not yet tested
+
+# assets[i] = a registered asset, assets[i].holders[j] = former or current i-holder
+data assets[2^50](creator, name, calldate, callprice, dividend_paid, holders[2^50], holdersCount)
+data nextAssetId
+
+# holdersMap: holdersMap[addr][asset] = 1 if addr holds asset
+data holdersMap[2^160][2^50]
+
+# balances[x][y] = how much of y x holds
+data balances[2^160][2^50]
+
+# orders[a][b] = heap of indices to (c, d, e) 
+# = c offers to sell d units of a at a price of e units of b per 10^18 units
+# of a
+data orderbooks[2^50][2^50]
+
+# store of general order data
+data orders[2^50](seller, asset_sold, quantity, price)
+data ordersCount
+
+# data feeds
+data feeds[2^50](owner, value)
+data feedCount
+
+# heap
+data heap
+extern heap: [register, push, pop, top, size]
+
+data cfds[2^50](maker, acceptor, feed, asset, strike, leverage, min, max, maturity)
+data cfdCount
+
+data bets[2^50](maker, acceptor, feed, asset, makerstake, acceptorstake, eqtest, maturity)
+data betCount
+
+def init():
+    heap = create('heap.se')
+
+# Add units (internal method)
+def add(to, asset, value):
+    assert msg.sender == self
+    self.balances[to][asset] += value
+    # Add the holder to the holders list
+    if not self.holdersMap[to][asset]:
+        self.holdersMap[to][asset] = 1
+        c = self.assets[asset].holdersCount
+        self.assets[asset].holders[c] = to
+        self.assets[asset].holdersCount = c + 1
+
+# Register a new asset
+def register_asset(q, name, calldate, callprice): 
+    newid = self.nextAssetId
+    self.assets[newid].creator = msg.sender
+    self.assets[newid].name = name
+    self.assets[newid].calldate = calldate
+    self.assets[newid].callprice = callprice
+    self.assets[newid].holders[0] = msg.sender
+    self.assets[newid].holdersCount = 1
+    self.balances[msg.sender][newid] = q
+    self.holdersMap[msg.sender][newid] = 1
+
+# Send
+def send(to, asset, value):
+    fromval = self.balances[msg.sender][asset]
+    if fromval >= value:
+        self.balances[msg.sender][asset] -= value
+        self.add(to, asset, value)
+
+# Order
+def mkorder(selling, buying, quantity, price):
+    # Make sure you have enough to pay for the order
+    assert self.balances[msg.sender][selling] >= quantity:
+    # Try to match existing orders
+    o = orderbooks[buying][selling]
+    if not o:
+        o = self.heap.register()
+        orderbooks[selling][buying] = o
+    sz = self.heap.size(o)
+    invprice = 10^36 / price
+    while quantity > 0 and sz > 0: 
+        orderid = self.heap.pop()
+        p = self.orders[orderid].price
+        if p > invprice:
+            sz = 0
+        else:
+            q = self.orders[orderid].quantity
+            oq = min(q, quantity)
+            b = self.orders[orderid].seller
+            self.balances[msg.sender][selling] -= oq * p / 10^18
+            self.add(msg.sender, buying, oq)
+            self.add(b, selling, oq * p / 10^18)
+            self.orders[orderid].quantity = q - oq
+            if oq == q:
+                self.orders[orderid].seller = 0
+                self.orders[orderid].price = 0
+                self.orders[orderid].asset_sold = 0
+            quantity -= oq
+            sz -= 1
+    assert quantity > 0
+    # Make the order
+    c = self.ordersCount
+    self.orders[c].seller = msg.sender
+    self.orders[c].asset_sold = selling
+    self.orders[c].quantity = quantity
+    self.orders[c].price = price
+    self.ordersCount += 1
+    # Add it to the heap
+    o = orderbooks[selling][buying]
+    if not o:
+        o = self.heap.register()
+        orderbooks[selling][buying] = o
+    self.balances[msg.sender][selling] -= quantity
+    self.heap.push(o, price, c)
+    return(c)
+
+def cancel_order(id):
+    if self.orders[id].seller == msg.sender:
+        self.orders[id].seller = 0
+        self.orders[id].price = 0
+        self.balances[msg.sender][self.orders[id].asset_sold] += self.orders[id].quantity
+        self.orders[id].quantity = 0
+        self.orders[id].asset_sold = 0
+
+def register_feed():
+    c = self.feedCount
+    self.feeds[c].owner = msg.sender
+    self.feedCount = c + 1
+    return(c)
+
+def set_feed(id, v):
+    if self.feeds[id].owner == msg.sender:
+        self.feeds[id].value = v
+
+def mk_cfd_offer(feed, asset, strike, leverage, min, max, maturity):
+    b = self.balances[msg.sender][asset]
+    req = max((strike - min) * leverage, (strike - max) * leverage)
+    assert b >= req
+    self.balances[msg.sender][asset] = b - req
+    c = self.cfdCount
+    self.cfds[c].maker = msg.sender
+    self.cfds[c].feed = feed
+    self.cfds[c].asset = asset
+    self.cfds[c].strike = strike
+    self.cfds[c].leverage = leverage
+    self.cfds[c].min = min
+    self.cfds[c].max = max
+    self.cfds[c].maturity = maturity
+    self.cfdCount = c + 1
+    return(c)
+
+def accept_cfd_offer(c):
+    assert not self.cfds[c].acceptor and self.cfds[c].maker
+    asset = self.cfds[c].asset
+    strike = self.cfds[c].strike
+    min = self.cfds[c].min
+    max = self.cfds[c].max
+    leverage = self.cfds[c].leverage
+    b = self.balances[msg.sender][asset]
+    req = max((min - strike) * leverage, (max - strike) * leverage)
+    assert b >= req
+    self.balances[msg.sender][asset] = b - req
+    self.cfds[c].acceptor = msg.sender
+    self.cfds[c].maturity += block.timestamp
+
+def claim_cfd_offer(c):
+    asset = self.cfds[c].asset
+    strike = self.cfds[c].strike
+    min = self.cfds[c].min
+    max = self.cfds[c].max
+    leverage = self.cfds[c].leverage
+    v = self.feeds[self.cfds[c].feed].value
+    assert v <= min or v >= max or block.timestamp >= self.cfds[c].maturity
+    maker_req = max((strike - min) * leverage, (strike - max) * leverage)
+    acceptor_req = max((min - strike) * leverage, (max - strike) * leverage)
+    paydelta = (strike - v) * leverage
+    self.add(self.cfds[c].maker, asset, maker_req + paydelta)
+    self.add(self.cfds[c].acceptor, asset, acceptor_req - paydelta)
+    self.cfds[c].maker = 0
+    self.cfds[c].acceptor = 0
+    self.cfds[c].feed = 0
+    self.cfds[c].asset = 0
+    self.cfds[c].strike = 0
+    self.cfds[c].leverage = 0
+    self.cfds[c].min = 0
+    self.cfds[c].max = 0
+    self.cfds[c].maturity = 0
+
+def withdraw_cfd_offer(c):
+    if self.cfds[c].maker == msg.sender and not self.cfds[c].acceptor:
+        asset = self.cfds[c].asset
+        strike = self.cfds[c].strike
+        min = self.cfds[c].min
+        max = self.cfds[c].max
+        leverage = self.cfds[c].leverage
+        maker_req = max((strike - min) * leverage, (strike - max) * leverage)
+        self.balances[self.cfds[c].maker][asset] += maker_req
+        self.cfds[c].maker = 0
+        self.cfds[c].acceptor = 0
+        self.cfds[c].feed = 0
+        self.cfds[c].asset = 0
+        self.cfds[c].strike = 0
+        self.cfds[c].leverage = 0
+        self.cfds[c].min = 0
+        self.cfds[c].max = 0
+        self.cfds[c].maturity = 0
+        
+
+def mk_bet_offer(feed, asset, makerstake, acceptorstake, eqtest, maturity):
+    assert self.balances[msg.sender][asset] >= makerstake
+    c = self.betCount
+    self.bets[c].maker = msg.sender
+    self.bets[c].feed = feed
+    self.bets[c].asset = asset
+    self.bets[c].makerstake = makerstake
+    self.bets[c].acceptorstake = acceptorstake
+    self.bets[c].eqtest = eqtest
+    self.bets[c].maturity = maturity
+    self.balances[msg.sender][asset] -= makerstake
+    self.betCount = c + 1
+    return(c)
+
+def accept_bet_offer(c):
+    assert self.bets[c].maker and not self.bets[c].acceptor
+    asset = self.bets[c].asset
+    acceptorstake = self.bets[c].acceptorstake
+    assert self.balances[msg.sender][asset] >= acceptorstake
+    self.balances[msg.sender][asset] -= acceptorstake
+    self.bets[c].acceptor = msg.sender
+
+def claim_bet_offer(c):
+    assert block.timestamp >= self.bets[c].maturity
+    v = self.feeds[self.bets[c].feed].value
+    totalstake = self.bets[c].makerstake + self.bets[c].acceptorstake
+    if v == self.bets[c].eqtest:
+        self.add(self.bets[c].maker, self.bets[c].asset, totalstake)
+    else:
+        self.add(self.bets[c].acceptor, self.bets[c].asset, totalstake)
+    self.bets[c].maker = 0
+    self.bets[c].feed = 0
+    self.bets[c].asset = 0
+    self.bets[c].makerstake = 0
+    self.bets[c].acceptorstake = 0
+    self.bets[c].eqtest = 0
+    self.bets[c].maturity = 0
+
+def cancel_bet(c):
+    assert not self.bets[c].acceptor and msg.sender == self.bets[c].maker
+    self.balances[msg.sender][self.bets[c].asset] += self.bets[c].makerstake
+    self.bets[c].maker = 0
+    self.bets[c].feed = 0
+    self.bets[c].asset = 0
+    self.bets[c].makerstake = 0
+    self.bets[c].acceptorstake = 0
+    self.bets[c].eqtest = 0
+    self.bets[c].maturity = 0
+
+def dividend(holder_asset, divvying_asset, ratio):
+    i = 0
+    sz = self.assets[holder_asset].holdersCount
+    t = 0
+    holders = array(sz)
+    payments = array(sz)
+    while i < sz:
+        holders[i] = self.assets[holder_asset].holders[i]
+        payments[i] = self.balances[holders[i]][holder_asset] * ratio / 10^18
+        t += payments[i]
+        i += 1
+    if self.balances[msg.sender][divvying_asset] >= t:
+        i = 0
+        while i < sz:
+            self.add(holders[i], divvying_asset, payments[i])
+            i += 1
+        self.balances[msg.sender][divvying_asset] -= t

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/counterparty/heap.se

@@ -0,0 +1,69 @@
+data heaps[2^50](owner, size, nodes[2^50](key, value))
+data heapIndex
+
+def register():
+    i = self.heapIndex
+    self.heaps[i].owner = msg.sender
+    self.heapIndex = i + 1
+    return(i)
+
+def push(heap, key, value):
+    assert msg.sender == self.heaps[heap].owner
+    sz = self.heaps[heap].size
+    self.heaps[heap].nodes[sz].key = key
+    self.heaps[heap].nodes[sz].value = value
+    k = sz + 1
+    while k > 1:
+        bottom = self.heaps[heap].nodes[k].key
+        top = self.heaps[heap].nodes[k/2].key
+        if bottom < top:
+            tvalue = self.heaps[heap].nodes[k/2].value
+            bvalue = self.heaps[heap].nodes[k].value
+            self.heaps[heap].nodes[k].key = top
+            self.heaps[heap].nodes[k].value = tvalue
+            self.heaps[heap].nodes[k/2].key = bottom
+            self.heaps[heap].nodes[k/2].value = bvalue
+            k /= 2
+        else:
+            k = 0
+    self.heaps[heap].size = sz + 1
+
+def pop(heap):
+    sz = self.heaps[heap].size
+    assert sz
+    prevtop = self.heaps[heap].nodes[1].value
+    self.heaps[heap].nodes[1].key = self.heaps[heap].nodes[sz].key
+    self.heaps[heap].nodes[1].value = self.heaps[heap].nodes[sz].value
+    self.heaps[heap].nodes[sz].key = 0
+    self.heaps[heap].nodes[sz].value = 0
+    top = self.heaps[heap].nodes[1].key
+    k = 1
+    while k * 2 < sz:
+        bottom1 = self.heaps[heap].nodes[k * 2].key
+        bottom2 = self.heaps[heap].nodes[k * 2 + 1].key
+        if bottom1 < top and (bottom1 < bottom2 or k * 2 + 1 >= sz):
+            tvalue = self.heaps[heap].nodes[1].value
+            bvalue = self.heaps[heap].nodes[k * 2].value
+            self.heaps[heap].nodes[k].key = bottom1
+            self.heaps[heap].nodes[k].value = bvalue
+            self.heaps[heap].nodes[k * 2].key = top
+            self.heaps[heap].nodes[k * 2].value = tvalue
+            k = k * 2
+        elif bottom2 < top and bottom2 < bottom1 and k * 2 + 1 < sz:
+            tvalue = self.heaps[heap].nodes[1].value
+            bvalue = self.heaps[heap].nodes[k * 2 + 1].value
+            self.heaps[heap].nodes[k].key = bottom2
+            self.heaps[heap].nodes[k].value = bvalue
+            self.heaps[heap].nodes[k * 2 + 1].key = top
+            self.heaps[heap].nodes[k * 2 + 1].value = tvalue
+            k = k * 2 + 1
+        else:
+            k = sz
+    self.heaps[heap].size = sz - 1
+    return(prevtop)
+
+def top(heap):
+    return(self.heaps[heap].nodes[1].value)
+
+def size(heap):
+    return(self.heaps[heap].size)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/crowdfund.se

@@ -0,0 +1,53 @@
+data campaigns[2^80](recipient, goal, deadline, contrib_total, contrib_count, contribs[2^50](sender, value))
+
+def create_campaign(id, recipient, goal, timelimit):
+    if self.campaigns[id].recipient:
+        return(0)
+    self.campaigns[id].recipient = recipient
+    self.campaigns[id].goal = goal
+    self.campaigns[id].deadline = block.timestamp + timelimit
+
+def contribute(id):
+    # Update contribution total
+    total_contributed = self.campaigns[id].contrib_total + msg.value
+    self.campaigns[id].contrib_total = total_contributed
+
+    # Record new contribution
+    sub_index = self.campaigns[id].contrib_count
+    self.campaigns[id].contribs[sub_index].sender = msg.sender
+    self.campaigns[id].contribs[sub_index].value = msg.value
+    self.campaigns[id].contrib_count = sub_index + 1
+
+    # Enough funding?
+    if total_contributed >= self.campaigns[id].goal:
+        send(self.campaigns[id].recipient, total_contributed)
+        self.clear(id)
+        return(1)
+
+    # Expired?
+    if block.timestamp > self.campaigns[id].deadline:
+        i = 0
+        c = self.campaigns[id].contrib_count
+        while i < c:
+            send(self.campaigns[id].contribs[i].sender, self.campaigns[id].contribs[i].value)
+            i += 1
+        self.clear(id)
+        return(2)
+
+def progress_report(id):
+    return(self.campaigns[id].contrib_total)
+
+# Clearing function for internal use
+def clear(id):
+    if self == msg.sender:
+        self.campaigns[id].recipient = 0
+        self.campaigns[id].goal = 0
+        self.campaigns[id].deadline = 0
+        c = self.campaigns[id].contrib_count
+        self.campaigns[id].contrib_count = 0
+        self.campaigns[id].contrib_total = 0
+        i = 0
+        while i < c:
+            self.campaigns[id].contribs[i].sender = 0
+            self.campaigns[id].contribs[i].value = 0
+            i += 1

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/cyberdyne/futarchy.se

@@ -0,0 +1,136 @@
+# 0: current epoch
+# 1: number of proposals
+# 2: master currency
+# 3: last winning market
+# 4: last txid
+# 5: long-term ema currency units purchased
+# 6: last block when currency units purchased
+# 7: ether allocated to last round
+# 8: last block when currency units claimed
+# 9: ether allocated to current round
+# 1000+: [proposal address, market ID, totprice, totvolume]
+
+init:
+    # We technically have two levels of epoch here. We have
+    # one epoch of 1000, to synchronize with the 1000 epoch
+    # of the market, and then 100 of those epochs make a
+    # meta-epoch (I'll nominate the term "seculum") over
+    # which the futarchy protocol will take place
+    contract.storage[0] = block.number / 1000
+    # The master currency of the futarchy. The futarchy will
+    # assign currency units to whoever the prediction market
+    # thinks will best increase the currency's value
+    master_currency = create('subcurrency.se')
+    contract.storage[2] = master_currency
+code:
+    curepoch = block.number / 1000
+    prevepoch = contract.storage[0]
+    if curepoch > prevepoch:
+        if (curepoch % 100) > 50:
+            # Collect price data
+            # We take an average over 50 subepochs to determine
+            # the price of each asset, weighting by volume to
+            # prevent abuse
+            contract.storage[0] = curepoch
+            i = 0
+            numprop = contract.storage[1]
+            while i < numprop:
+                market = contract.storage[1001 + i * 4]
+                price = call(market, 2)
+                volume = call(market, 3)
+                contract.storage[1002 + i * 4] += price
+                contract.storage[1003 + i * 4] += volume * price
+                i += 1
+        if (curepoch / 100) > (prevepoch / 100):
+            # If we are entering a new seculum, we determine the
+            # market with the highest total average price
+            best = 0
+            bestmarket = 0
+            besti = 0
+            i = 0
+            while i < numprop:
+                curtotprice = contract.storage[1002 + i * 4]
+                curvolume = contract.storage[1002 + i * 4]
+                curavgprice = curtotprice / curvolume
+                if curavgprice > best:
+                    best = curavgprice
+                    besti = i
+                    bestmarket = contract.storage[1003 + i * 4]
+                i += 1
+            # Reset the number of proposals to 0
+            contract.storage[1] = 0
+            # Reward the highest proposal
+            call(contract.storage[2], [best, 10^9, 0], 3)
+            # Record the winning market so we can later appropriately
+            # compensate the participants
+            contract.storage[2] = bestmarket
+            # The amount of ether allocated to the last round
+            contract.storage[7] = contract.storage[9]
+            # The amount of ether allocated to the next round
+            contract.storage[9] = contract.balance / 2
+    # Make a proposal [0, address]
+    if msg.data[0] == 0 and curepoch % 100 < 50:
+        pid = contract.storage[1]
+        market = create('market.se')
+        c1 = create('subcurrency.se')
+        c2 = create('subcurrency.se')
+        call(market,  [c1, c2], 2)
+        contract.storage[1000 + pid * 4] = msg.data[1]
+        contract.storage[1001 + pid * 4] = market
+        contract.storage[1] += 1        
+    # Claim ether [1, address]
+    # One unit of the first currency in the last round's winning
+    # market entitles you to a quantity of ether that was decided
+    # at the start of that epoch
+    elif msg.data[0] == 1:
+        first_subcurrency = call(contract.storage[2], 3)
+        # We ask the first subcurrency contract what the last transaction was. The
+        # way to make a claim is to send the amount of first currency units that
+        # you wish to claim with, and then immediately call this contract. For security
+        # it makes sense to set up a tx which sends both messages in sequence atomically
+        data = call(first_subcurrency, [], 0, 4)
+        from = data[0]
+        to = data[1]
+        value = data[2]
+        txid = data[3]
+        if txid > contract.storage[4] and to == contract.address:
+            send(to, contract.storage[7] * value / 10^9)
+            contract.storage[4] = txid
+    # Claim second currency [2, address]
+    # One unit of the second currency in the last round's winning
+    # market entitles you to one unit of the futarchy's master
+    # currency
+    elif msg.data[0] == 2:
+        second_subcurrency = call(contract.storage[2], 3)
+        data = call(first_subcurrency, [], 0, 4)
+        from = data[0]
+        to = data[1]
+        value = data[2]
+        txid = data[3]
+        if txid > contract.storage[4] and to == contract.address:
+            call(contract.storage[2], [to, value], 2)
+            contract.storage[4] = txid
+    # Purchase currency for ether (target releasing 10^9 units per seculum)
+    # Price starts off 1 eth for 10^9 units but increases hyperbolically to
+    # limit issuance
+    elif msg.data[0] == 3:
+        pre_ema = contract.storage[5]
+        post_ema = pre_ema + msg.value
+        pre_reserve = 10^18 / (10^9 + pre_ema / 10^9)
+        post_reserve = 10^18 / (10^9 + post_ema / 10^9)
+        call(contract.storage[2], [msg.sender, pre_reserve - post_reserve], 2)
+        last_sold = contract.storage[6]
+        contract.storage[5] = pre_ema * (100000 + last_sold - block.number) + msg.value
+        contract.storage[6] = block.number
+    # Claim all currencies as the ether miner of the current block
+    elif msg.data[0] == 2 and msg.sender == block.coinbase and block.number > contract.storage[8]:
+        i = 0
+        numproposals = contract.storage[1]
+        while i < numproposals:
+            market = contract.storage[1001 + i * 3]
+            fc = call(market, 4)
+            sc = call(market, 5)
+            call(fc, [msg.sender, 1000], 2)
+            call(sc, [msg.sender, 1000], 2)
+            i += 1
+        contract.storage[8] = block.number

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/cyberdyne/heap.se

@@ -0,0 +1,55 @@
+# 0: size
+# 1-n: elements
+
+init:
+    contract.storage[1000] = msg.sender
+code:
+    # Only owner of the heap is allowed to modify it
+    if contract.storage[1000] != msg.sender:
+        stop
+    # push
+    if msg.data[0] == 0:
+        sz = contract.storage[0]
+        contract.storage[sz + 1] = msg.data[1]
+        k = sz + 1
+        while k > 1:
+            bottom = contract.storage[k]
+            top = contract.storage[k/2]
+            if bottom < top:
+                contract.storage[k] = top
+                contract.storage[k/2] = bottom
+                k /= 2
+            else:
+                k = 0
+        contract.storage[0] = sz + 1
+    # pop
+    elif msg.data[0] == 1:
+        sz = contract.storage[0]
+        if !sz:
+            return(0)
+        prevtop = contract.storage[1]
+        contract.storage[1] = contract.storage[sz]
+        contract.storage[sz] = 0
+        top = contract.storage[1]
+        k = 1
+        while k * 2 < sz:
+            bottom1 = contract.storage[k * 2]
+            bottom2 = contract.storage[k * 2 + 1]
+            if bottom1 < top and (bottom1 < bottom2 or k * 2 + 1 >= sz):
+                contract.storage[k] = bottom1
+                contract.storage[k * 2] = top
+                k = k * 2
+            elif bottom2 < top and bottom2 < bottom1 and k * 2 + 1 < sz:
+                contract.storage[k] = bottom2
+                contract.storage[k * 2 + 1] = top
+                k = k * 2 + 1
+            else:
+                k = sz
+        contract.storage[0] = sz - 1
+        return(prevtop)
+    # top
+    elif msg.data[0] == 2:
+        return(contract.storage[1])
+    # size
+    elif msg.data[0] == 3:
+        return(contract.storage[0])

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/cyberdyne/market.se

@@ -0,0 +1,117 @@
+# Creates a decentralized market between any two subcurrencies
+
+# Here, the first subcurrency is the base asset and the second
+# subcurrency is the asset priced against the base asset. Hence,
+# "buying" refers to trading the first for the second, and
+# "selling" refers to trading the second for the first
+
+# storage 0: buy orders
+# storage 1: sell orders
+# storage 1000: first subcurrency
+# storage 1001: last first subcurrency txid
+# storage 2000: second subcurrency
+# storage 2001: last second subcurrency txid
+# storage 3000: current epoch
+# storage 4000: price
+# storage 4001: volume
+
+init:
+    # Heap for buy orders
+    contract.storage[0] = create('heap.se')
+    # Heap for sell orders
+    contract.storage[1] = create('heap.se')
+code:
+    # Initialize with [ first_subcurrency, second_subcurrency ]
+    if !contract.storage[1000]:
+        contract.storage[1000] = msg.data[0] # First subcurrency
+        contract.storage[1001] = -1
+        contract.storage[2000] = msg.data[1] # Second subcurrency
+        contract.storage[2001] = -1
+        contract.storage[3000] = block.number / 1000
+        stop
+    first_subcurrency = contract.storage[1000]
+    second_subcurrency = contract.storage[2000]
+    buy_heap = contract.storage[0]
+    sell_heap = contract.storage[1]
+    # This contract operates in "epochs" of 100 blocks
+    # At the end of each epoch, we process all orders
+    # simultaneously, independent of order. This algorithm
+    # prevents front-running, and generates a profit from
+    # the spread. The profit is permanently kept in the
+    # market (ie. destroyed), making both subcurrencies
+    # more valuable
+    
+    # Epoch transition code
+    if contract.storage[3000] < block.number / 100:
+        done = 0
+        volume = 0
+        while !done:
+            # Grab the top buy and sell order from each heap
+            topbuy = call(buy_heap, 1)
+            topsell = call(sell_heap, 1)
+            # An order is recorded in the heap as:
+            # Buys: (2^48 - 1 - price) * 2^208 + units of first currency * 2^160 + from
+            # Sells: price * 2^208 + units of second currency * 2^160 + from
+            buyprice = -(topbuy / 2^208)
+            buyfcvalue = (topbuy / 2^160) % 2^48
+            buyer = topbuy % 2^160
+            sellprice = topsell / 2^208
+            sellscvalue = (topsell / 2^160) % 2^48
+            seller = topsell % 2^160
+            # Heap empty, or no more matching orders
+            if not topbuy or not topsell or buyprice < sellprice:
+                done = 1
+            else:
+                # Add to volume counter
+                volume += buyfcvalue
+                # Calculate how much of the second currency the buyer gets, and
+                # how much of the first currency the seller gets
+                sellfcvalue = sellscvalue / buyprice
+                buyscvalue = buyfcvalue * sellprice
+                # Send the currency units along
+                call(second_subcurrency, [buyer, buyscvalue], 2)
+                call(first_subcurrency, [seller, sellfcvalue], 2)
+        if volume:
+            contract.storage[4000] = (buyprice + sellprice) / 2
+        contract.storage[4001] = volume
+        contract.storage[3000] = block.number / 100
+    # Make buy order [0, price]
+    if msg.data[0] == 0:
+        # We ask the first subcurrency contract what the last transaction was. The
+        # way to make a buy order is to send the amount of first currency units that
+        # you wish to buy with, and then immediately call this contract. For security
+        # it makes sense to set up a tx which sends both messages in sequence atomically
+        data = call(first_subcurrency, [], 0, 4)
+        from = data[0]
+        to = data[1]
+        value = data[2]
+        txid = data[3]
+        price = msg.data[1]
+        if txid > contract.storage[1001] and to == contract.address:
+            contract.storage[1001] = txid
+            # Adds the order to the heap
+            call(buy_heap, [0, -price * 2^208 + (value % 2^48) * 2^160 + from], 2) 
+    # Make sell order [1, price]
+    elif msg.data[0] == 1:
+        # Same mechanics as buying
+        data = call(second_subcurrency, [], 0, 4)
+        from = data[0]
+        to = data[1]
+        value = data[2]
+        txid = data[3]
+        price = msg.data[1]
+        if txid > contract.storage[2001] and to == contract.address:
+            contract.storage[2001] = txid
+            call(sell_heap, [0, price * 2^208 + (value % 2^48) * 2^160 + from], 2) 
+    # Ask for price
+    elif msg.data[0] == 2:
+        return(contract.storage[4000])
+    # Ask for volume
+    elif msg.data[0] == 3:
+        return(contract.storage[1000])
+    # Ask for first currency
+    elif msg.data[0] == 4:
+        return(contract.storage[2000])
+    # Ask for second currency
+    elif msg.data[0] == 5:
+        return(contract.storage[4001])

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/cyberdyne/subcurrency.se

@@ -0,0 +1,35 @@
+# Initialization
+# Admin can issue and delete at will
+init:
+    contract.storage[0] = msg.sender
+code:
+    # If a message with one item is sent, that's a balance query
+    if msg.datasize == 1:
+        addr = msg.data[0]
+        return(contract.storage[addr])
+    # If a message with two items [to, value] are sent, that's a transfer request
+    elif msg.datasize == 2:
+        from = msg.sender
+        fromvalue = contract.storage[from]
+        to = msg.data[0]
+        value = msg.data[1]
+        if fromvalue >= value and value > 0 and to > 4:
+            contract.storage[from] = fromvalue - value
+            contract.storage[to] += value
+            contract.storage[2] = from
+            contract.storage[3] = to
+            contract.storage[4] = value
+            contract.storage[5] += 1
+            return(1)
+        return(0)
+    elif msg.datasize == 3 and msg.sender == contract.storage[0]:
+        # Admin can issue at will by sending a [to, value, 0] message
+        if msg.data[2] == 0:
+            contract.storage[msg.data[0]] += msg.data[1]
+        # Change admin [ newadmin, 0, 1 ]
+        # Set admin to 0 to disable administration
+        elif msg.data[2] == 1:
+            contract.storage[0] = msg.data[0]
+    # Fetch last transaction
+    else:
+        return([contract.storage[2], contract.storage[3], contract.storage[4], contract.storage[5]], 4)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/cyberdyne/test.py

@@ -0,0 +1,39 @@
+from __future__ import print_function
+import pyethereum
+t = pyethereum.tester
+s = t.state()
+# Create currencies
+c1 = s.contract('subcurrency.se')
+print("First currency: %s" % c1)
+c2 = s.contract('subcurrency.se')
+print("First currency: %s" % c2)
+# Allocate units
+s.send(t.k0, c1, 0, [t.a0, 1000, 0])
+s.send(t.k0, c1, 0, [t.a1, 1000, 0])
+s.send(t.k0, c2, 0, [t.a2, 1000000, 0])
+s.send(t.k0, c2, 0, [t.a3, 1000000, 0])
+print("Allocated units")
+# Market
+m = s.contract('market.se')
+s.send(t.k0, m, 0, [c1, c2])
+# Place orders
+s.send(t.k0, c1, 0, [m, 1000])
+s.send(t.k0, m, 0, [0, 1200])
+s.send(t.k1, c1, 0, [m, 1000])
+s.send(t.k1, m, 0, [0, 1400])
+s.send(t.k2, c2, 0, [m, 1000000])
+s.send(t.k2, m, 0, [1, 800])
+s.send(t.k3, c2, 0, [m, 1000000])
+s.send(t.k3, m, 0, [1, 600])
+print("Orders placed")
+# Next epoch and ping
+s.mine(100)
+print("Mined 100")
+s.send(t.k0, m, 0, [])
+print("Updating")
+# Check
+assert s.send(t.k0, c2, 0, [t.a0]) == [800000]
+assert s.send(t.k0, c2, 0, [t.a1]) == [600000]
+assert s.send(t.k0, c1, 0, [t.a2]) == [833]
+assert s.send(t.k0, c1, 0, [t.a3]) == [714]
+print("Balance checks passed")

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/datafeed.se

@@ -0,0 +1,12 @@
+# Database updateable only by the original creator
+data creator
+
+def init():
+    self.creator = msg.sender
+
+def update(k, v):
+    if msg.sender == self.creator:
+        self.storage[k] = v
+
+def query(k):
+    return(self.storage[k])

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/ecc/ecrecover.se

@@ -0,0 +1,40 @@
+# So I looked up on Wikipedia what Jacobian form actually is, and noticed that it's 
+# actually a rather different and more clever construction than the naive version
+# that I created. It may possible to achieve a further 20-50% savings by applying 
+# that version.
+
+extern all: [call]
+
+data JORDANMUL
+data JORDANADD
+data EXP
+
+def init():
+    self.JORDANMUL = create('jacobian_mul.se')
+    self.JORDANADD = create('jacobian_add.se')
+    self.EXP = create('modexp.se')
+
+def call(h, v, r, s):
+    N = -432420386565659656852420866394968145599
+    P = -4294968273
+    h = mod(h, N)
+    r = mod(r, P)
+    s = mod(s, N)
+    Gx = 55066263022277343669578718895168534326250603453777594175500187360389116729240
+    Gy = 32670510020758816978083085130507043184471273380659243275938904335757337482424
+    x = r
+    xcubed = mulmod(mulmod(x, x, P), x, P)
+    beta = self.EXP.call(addmod(xcubed, 7, P), div(P + 1, 4), P)
+    
+    # Static-gascost ghetto conditional
+    y_is_positive = mod(v, 2) xor mod(beta, 2)
+    y = beta * y_is_positive + (P - beta) * (1 - y_is_positive)
+    
+    GZ = self.JORDANMUL.call(Gx, 1, Gy, 1, N - h, outsz=4)
+    XY = self.JORDANMUL.call(x, 1, y, 1, s, outsz=4)
+    COMB = self.JORDANADD.call(GZ[0], GZ[1], GZ[2], GZ[3], XY[0], XY[1], XY[2], XY[3], 1, outsz=5)
+    COMB[4] = self.EXP.call(r, N - 2, N)
+    Q = self.JORDANMUL.call(data=COMB, datasz=5, outsz=4)
+    ox = mulmod(Q[0], self.EXP.call(Q[1], P - 2, P), P)
+    oy = mulmod(Q[2], self.EXP.call(Q[3], P - 2, P), P)
+    return([ox, oy], 2)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/ecc/jacobian_add.se

@@ -0,0 +1,32 @@
+extern all: [call]
+data DOUBLE
+
+def init():
+    self.DOUBLE = create('jacobian_double.se')
+
+def call(axn, axd, ayn, ayd, bxn, bxd, byn, byd):
+    if !axn and !ayn:
+        o = [bxn, bxd, byn, byd]
+    if !bxn and !byn:
+        o = [axn, axd, ayn, ayd]
+    if o:
+        return(o, 4)
+    with P = -4294968273:
+        if addmod(mulmod(axn, bxd, P), P - mulmod(axd, bxn, P), P) == 0:
+            if addmod(mulmod(ayn, byd, P), P - mulmod(ayd, byn, P), P) == 0:
+                return(self.DOUBLE.call(axn, axd, ayn, ayd, outsz=4), 4)
+            else:
+                return([0, 1, 0, 1], 4)
+        with mn = mulmod(addmod(mulmod(byn, ayd, P), P - mulmod(ayn, byd, P), P), mulmod(bxd, axd, P), P):
+            with md = mulmod(mulmod(byd, ayd, P), addmod(mulmod(bxn, axd, P), P - mulmod(axn, bxd, P), P), P):
+                with msqn = mulmod(mn, mn, P):
+                    with msqd = mulmod(md, md, P):
+                        with msqman = addmod(mulmod(msqn, axd, P), P - mulmod(msqd, axn, P), P):
+                            with msqmad = mulmod(msqd, axd, P):
+                                with xn = addmod(mulmod(msqman, bxd, P), P - mulmod(msqmad, bxn, P), P):
+                                    with xd = mulmod(msqmad, bxd, P):
+                                        with mamxn = mulmod(mn, addmod(mulmod(axn, xd, P), P - mulmod(xn, axd, P), P), P):
+                                            with mamxd = mulmod(md, mulmod(axd, xd, P), P):
+                                                with yn = addmod(mulmod(mamxn, ayd, P), P - mulmod(mamxd, ayn, P), P):
+                                                    with yd = mulmod(mamxd, ayd, P):
+                                                        return([xn, xd, yn, yd], 4)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/ecc/jacobian_double.se

@@ -0,0 +1,16 @@
+def call(axn, axd, ayn, ayd):
+    if !axn and !ayn:
+        return([0, 1, 0, 1], 4)
+    with P = -4294968273:
+        # No need to add (A, 1) because A = 0 for bitcoin
+        with mn = mulmod(mulmod(mulmod(axn, axn, P), 3, P), ayd, P):
+            with md = mulmod(mulmod(axd, axd, P), mulmod(ayn, 2, P), P):
+                with msqn = mulmod(mn, mn, P):
+                    with msqd = mulmod(md, md, P):
+                        with xn = addmod(mulmod(msqn, axd, P), P - mulmod(msqd, mulmod(axn, 2, P), P), P):
+                            with xd = mulmod(msqd, axd, P):
+                                with mamxn = mulmod(addmod(mulmod(axn, xd, P), P - mulmod(axd, xn, P), P), mn, P):
+                                    with mamxd = mulmod(mulmod(axd, xd, P), md, P):
+                                        with yn = addmod(mulmod(mamxn, ayd, P), P - mulmod(mamxd, ayn, P), P):
+                                            with yd = mulmod(mamxd, ayd, P):
+                                                return([xn, xd, yn, yd], 4)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/ecc/jacobian_mul.se

@@ -0,0 +1,37 @@
+# Expected gas cost
+#
+# def expect(n, point_at_infinity=False):
+#     n = n % (2**256 - 432420386565659656852420866394968145599)
+#     if point_at_infinity:
+#         return 79
+#     if n == 0:
+#         return 34479
+#     L = int(1 + math.log(n) / math.log(2))
+#     H = len([x for x in b.encode(n, 2) if x == '1'])
+#     return 34221 + 94 * L + 343 * H
+
+data DOUBLE
+data ADD
+
+def init():
+    self.DOUBLE = create('jacobian_double.se')
+    self.ADD = create('jacobian_add.se')
+
+def call(axn, axd, ayn, ayd, n):
+    n = mod(n, -432420386565659656852420866394968145599)
+    if !axn * !ayn + !n: # Constant-gas version of !axn and !ayn or !n
+        return([0, 1, 0, 1], 4)
+    with o = [0, 0, 1, 0, 1, 0, 0, 0, 0]:
+        with b = 2 ^ 255:
+            while gt(b, 0):
+                if n & b:
+                    ~call(20000, self.DOUBLE, 0, o + 31, 129, o + 32, 128)
+                    o[5] = axn
+                    o[6] = axd
+                    o[7] = ayn
+                    o[8] = ayd
+                    ~call(20000, self.ADD, 0, o + 31, 257, o + 32, 128)
+                else:
+                    ~call(20000, self.DOUBLE, 0, o + 31, 129, o + 32, 128)
+                b = div(b, 2)
+            return(o + 32, 4)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/ecc/modexp.se

@@ -0,0 +1,11 @@
+def call(b, e, m):
+    with o = 1:
+        with bit = 2 ^ 255:
+            while gt(bit, 0):
+                # A touch of loop unrolling for 20% efficiency gain
+                o = mulmod(mulmod(o, o, m), b ^ !(!(e & bit)), m)
+                o = mulmod(mulmod(o, o, m), b ^ !(!(e & div(bit, 2))), m)
+                o = mulmod(mulmod(o, o, m), b ^ !(!(e & div(bit, 4))), m)
+                o = mulmod(mulmod(o, o, m), b ^ !(!(e & div(bit, 8))), m)
+                bit = div(bit, 16)
+            return(o)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/ecc/substitutes.py

@@ -0,0 +1,78 @@
+import bitcoin as b
+import math
+import sys
+
+
+def signed(o):
+    return map(lambda x: x - 2**256 if x >= 2**255 else x, o)
+
+
+def hamming_weight(n):
+    return len([x for x in b.encode(n, 2) if x == '1'])
+
+
+def binary_length(n):
+    return len(b.encode(n, 2))
+
+
+def jacobian_mul_substitute(A, B, C, D, N):
+    if A == 0 and C == 0 or (N % b.N) == 0:
+        return {"gas": 86, "output": [0, 1, 0, 1]}
+    else:
+        output = b.jordan_multiply(((A, B), (C, D)), N)
+        return {
+            "gas": 35262 + 95 * binary_length(N % b.N) + 355 * hamming_weight(N % b.N),
+            "output": signed(list(output[0]) + list(output[1]))
+        }
+
+
+def jacobian_add_substitute(A, B, C, D, E, F, G, H):
+    if A == 0 or E == 0:
+        gas = 149
+    elif (A * F - B * E) % b.P == 0:
+        if (C * H - D * G) % b.P == 0:
+            gas = 442
+        else:
+            gas = 177
+    else:
+        gas = 301
+    output = b.jordan_add(((A, B), (C, D)), ((E, F), (G, H)))
+    return {
+        "gas": gas,
+        "output": signed(list(output[0]) + list(output[1]))
+    }
+
+
+def modexp_substitute(base, exp, mod):
+    return {
+        "gas": 5150,
+        "output": signed([pow(base, exp, mod) if mod > 0 else 0])
+    }
+
+
+def ecrecover_substitute(z, v, r, s):
+    P, A, B, N, Gx, Gy = b.P, b.A, b.B, b.N, b.Gx, b.Gy
+    x = r
+    beta = pow(x*x*x+A*x+B, (P + 1) / 4, P)
+    BETA_PREMIUM = modexp_substitute(x, (P + 1) / 4, P)["gas"]
+    y = beta if v % 2 ^ beta % 2 else (P - beta)
+    Gz = b.jordan_multiply(((Gx, 1), (Gy, 1)), (N - z) % N)
+    GZ_PREMIUM = jacobian_mul_substitute(Gx, 1, Gy, 1, (N - z) % N)["gas"]
+    XY = b.jordan_multiply(((x, 1), (y, 1)), s)
+    XY_PREMIUM = jacobian_mul_substitute(x, 1, y, 1, s % N)["gas"]
+    Qr = b.jordan_add(Gz, XY)
+    QR_PREMIUM = jacobian_add_substitute(Gz[0][0], Gz[0][1], Gz[1][0], Gz[1][1],
+                                         XY[0][0], XY[0][1], XY[1][0], XY[1][1]
+                                         )["gas"]
+    Q = b.jordan_multiply(Qr, pow(r, N - 2, N))
+    Q_PREMIUM = jacobian_mul_substitute(Qr[0][0], Qr[0][1], Qr[1][0], Qr[1][1],
+                                        pow(r, N - 2, N))["gas"]
+    R_PREMIUM = modexp_substitute(r, N - 2, N)["gas"]
+    OX_PREMIUM = modexp_substitute(Q[0][1], P - 2, P)["gas"]
+    OY_PREMIUM = modexp_substitute(Q[1][1], P - 2, P)["gas"]
+    Q = b.from_jordan(Q)
+    return {
+        "gas": 991 + BETA_PREMIUM + GZ_PREMIUM + XY_PREMIUM + QR_PREMIUM +
+        Q_PREMIUM + R_PREMIUM + OX_PREMIUM + OY_PREMIUM,
+        "output": signed(Q)
+    }

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/ecc/test.py

@@ -0,0 +1,129 @@
+import bitcoin as b
+import random
+import sys
+import math
+from pyethereum import tester as t
+import substitutes
+import time
+
+vals = [random.randrange(2**256) for i in range(12)]
+
+test_points = [list(p[0]) + list(p[1]) for p in
+               [b.jordan_multiply(((b.Gx, 1), (b.Gy, 1)), r) for r in vals]]
+
+G = [b.Gx, 1, b.Gy, 1]
+Z = [0, 1, 0, 1]
+
+
+def neg_point(p):
+    return [p[0], b.P - p[1], p[2], b.P - p[3]]
+
+s = t.state()
+s.block.gas_limit = 10000000
+t.gas_limit = 1000000
+
+
+c = s.contract('modexp.se')
+print "Starting modexp tests"
+
+for i in range(0, len(vals) - 2, 3):
+    o1 = substitutes.modexp_substitute(vals[i], vals[i+1], vals[i+2])
+    o2 = s.profile(t.k0, c, 0, funid=0, abi=vals[i:i+3])
+    #assert o1["gas"] == o2["gas"], (o1, o2)
+    assert o1["output"] == o2["output"], (o1, o2)
+
+c = s.contract('jacobian_add.se')
+print "Starting addition tests"
+
+for i in range(2):
+    P = test_points[i * 2]
+    Q = test_points[i * 2 + 1]
+    NP = neg_point(P)
+
+    o1 = substitutes.jacobian_add_substitute(*(P + Q))
+    o2 = s.profile(t.k0, c, 0, funid=0, abi=P + Q)
+    #assert o1["gas"] == o2["gas"], (o1, o2)
+    assert o1["output"] == o2["output"], (o1, o2)
+
+    o1 = substitutes.jacobian_add_substitute(*(P + NP))
+    o2 = s.profile(t.k0, c, 0, funid=0, abi=P + NP)
+    #assert o1["gas"] == o2["gas"], (o1, o2)
+    assert o1["output"] == o2["output"], (o1, o2)
+
+    o1 = substitutes.jacobian_add_substitute(*(P + P))
+    o2 = s.profile(t.k0, c, 0, funid=0, abi=P + P)
+    #assert o1["gas"] == o2["gas"], (o1, o2)
+    assert o1["output"] == o2["output"], (o1, o2)
+
+    o1 = substitutes.jacobian_add_substitute(*(P + Z))
+    o2 = s.profile(t.k0, c, 0, funid=0, abi=P + Z)
+    #assert o1["gas"] == o2["gas"], (o1, o2)
+    assert o1["output"] == o2["output"], (o1, o2)
+
+    o1 = substitutes.jacobian_add_substitute(*(Z + P))
+    o2 = s.profile(t.k0, c, 0, funid=0, abi=Z + P)
+    #assert o1["gas"] == o2["gas"], (o1, o2)
+    assert o1["output"] == o2["output"], (o1, o2)
+
+
+c = s.contract('jacobian_mul.se')
+print "Starting multiplication tests"
+
+
+mul_tests = [
+    Z + [0],
+    Z + [vals[0]],
+    test_points[0] + [0],
+    test_points[1] + [b.N],
+    test_points[2] + [1],
+    test_points[2] + [2],
+    test_points[2] + [3],
+    test_points[2] + [4],
+    test_points[3] + [5],
+    test_points[3] + [6],
+    test_points[4] + [7],
+    test_points[4] + [2**254],
+    test_points[4] + [vals[1]],
+    test_points[4] + [vals[2]],
+    test_points[4] + [vals[3]],
+    test_points[5] + [2**256 - 1],
+]
+
+for i, test in enumerate(mul_tests):
+    print 'trying mul_test %i' % i, test
+    o1 = substitutes.jacobian_mul_substitute(*test)
+    o2 = s.profile(t.k0, c, 0, funid=0, abi=test)
+    # assert o1["gas"] == o2["gas"], (o1, o2, test)
+    assert o1["output"] == o2["output"], (o1, o2, test)
+
+c = s.contract('ecrecover.se')
+print "Starting ecrecover tests"
+
+for i in range(5):
+    print 'trying ecrecover_test', vals[i*2], vals[i*2+1]
+    k = vals[i*2]
+    h = vals[i*2+1]
+    V, R, S = b.ecdsa_raw_sign(b.encode(h, 256, 32), k)
+    aa = time.time()
+    o1 = substitutes.ecrecover_substitute(h, V, R, S)
+    print 'sub', time.time() - aa
+    a = time.time()
+    o2 = s.profile(t.k0, c, 0, funid=0, abi=[h, V, R, S])
+    print time.time() - a
+    # assert o1["gas"] == o2["gas"], (o1, o2, h, V, R, S)
+    assert o1["output"] == o2["output"], (o1, o2, h, V, R, S)
+
+# Explicit tests
+
+data = [[
+    0xf007a9c78a4b2213220adaaf50c89a49d533fbefe09d52bbf9b0da55b0b90b60,
+    0x1b,
+    0x5228fc9e2fabfe470c32f459f4dc17ef6a0a81026e57e4d61abc3bc268fc92b5,
+    0x697d4221cd7bc5943b482173de95d3114b9f54c5f37cc7f02c6910c6dd8bd107
+]]
+
+for datum in data:
+    o1 = substitutes.ecrecover_substitute(*datum)
+    o2 = s.profile(t.k0, c, 0, funid=0, abi=datum)
+    #assert o1["gas"] == o2["gas"], (o1, o2, datum)
+    assert o1["output"] == o2["output"], (o1, o2, datum)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/eth15/channel.se

@@ -0,0 +1,45 @@
+if msg.data[0] == 0:
+    new_id = contract.storage[-1]
+    # store [from, to, value, maxvalue, timeout] in contract storage
+    contract.storage[new_id] = msg.sender
+    contract.storage[new_id + 1] = msg.data[1]
+    contract.storage[new_id + 2] = 0
+    contract.storage[new_id + 3] = msg.value
+    contract.storage[new_id + 4] = 2^254
+    # increment next id
+    contract.storage[-1] = new_id + 10
+    # return id of this channel
+    return(new_id)
+
+# Increase payment on channel: [1, id, value, v, r, s]
+elif msg.data[0] == 1:
+    # Ecrecover native extension; will be a different address in testnet and live
+    ecrecover = 0x46a8d0b21b1336d83b06829f568d7450df36883f
+    # Message data parameters
+    id = msg.data[1] % 2^160
+    value = msg.data[2]
+    # Determine sender from signature
+    h = sha3([id, value], 2)
+    sender = call(ecrecover, [h, msg.data[3], msg.data[4], msg.data[5]], 4)
+    # Check sender matches and new value is greater than old
+    if sender == contract.storage[id]:
+        if value > contract.storage[id + 2] and value <= contract.storage[id + 3]:
+            # Update channel, increasing value and setting timeout
+            contract.storage[id + 2] = value
+            contract.storage[id + 4] = block.number + 1000
+
+# Cash out channel: [2, id]
+elif msg.data[0] == 2:
+    id = msg.data[1] % 2^160
+    # Check if timeout has run out
+    if block.number >= contract.storage[id + 3]:
+        # Send funds
+        send(contract.storage[id + 1], contract.storage[id + 2])
+        # Send refund
+        send(contract.storage[id], contract.storage[id + 3] - contract.storage[id + 2])
+        # Clear storage
+        contract.storage[id] = 0
+        contract.storage[id + 1] = 0
+        contract.storage[id + 2] = 0
+        contract.storage[id + 3] = 0
+        contract.storage[id + 4] = 0

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/eth15/map.se

@@ -0,0 +1,19 @@
+# An implementation of a contract for storing a key/value binding
+init:
+    # Set owner
+    contract.storage[0] = msg.sender
+code:
+    # Check ownership
+    if msg.sender == contract.storage[0]:
+        # Get: returns (found, val)
+        if msg.data[0] == 0:
+            s = sha3(msg.data[1])
+            return([contract.storage[s], contract.storage[s+1]], 2)
+        # Set: sets map[k] = v
+        elif msg.data[0] == 1:
+            s = sha3(msg.data[1])
+            contract.storage[s] = 1
+            contract.storage[s + 1] = msg.data[2]
+        # Suicide
+        elif msg.data[2] == 1:
+            suicide(0)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/eth15/multiforward.se

@@ -0,0 +1,14 @@
+init:
+    contract.storage[0] = msg.sender
+code:
+    if msg.sender != contract.storage[0]:
+        stop
+    i = 0
+    while i < ~calldatasize():
+        to = ~calldataload(i)
+        value = ~calldataload(i+20) / 256^12
+        datasize = ~calldataload(i+32) / 256^30
+        data = alloc(datasize)
+        ~calldatacopy(data, i+34, datasize)
+        ~call(tx.gas - 25, to, value, data, datasize, 0, 0)
+        i += 34 + datasize

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/eth15/shadowchain.se

@@ -0,0 +1,166 @@
+# Exists in state:
+# (i) last committed block
+# (ii) chain of uncommitted blocks (linear only)
+# (iii) transactions, each tx with an associated block number
+#
+# Uncommitted block =
+#     [ numtxs, numkvs, tx1 (N words), tx2 (N words) ..., [k1, v1], [k2, v2], [k3, v3] ... ]
+#
+# Block checking process
+#
+# Suppose last committed state is m
+# Last uncommitted state is n
+# Contested block is b
+#
+# 1. Temporarily apply all state transitions from
+# m to b
+# 2. Run code, get list of changes
+# 3. Check is list of changes matches deltas
+#   * if yes, do nothing
+#   * if no, set last uncommitted state to pre-b
+#
+# Storage variables:
+#
+# Last committed block: 0
+# Last uncommitted block: 1
+# Contract holding code: 2
+# Uncommitted map: 3
+# Transaction length (parameter): 4
+# Block b: 2^160 + b * 2^40:
+#             + 1: submission blknum
+#             + 2: submitter
+#             + 3: data in uncommitted block format above
+# Last committed storage:
+#             sha3(k): index k
+
+# Initialize: [0, c, txlength], set address of the code-holding contract and the transaction
+# length
+if not contract.storage[2]:
+    contract.storage[2] = msg.data[1]
+    contract.storage[4] = msg.data[2]
+    stop
+
+# Sequentially commit all uncommitted blocks that are more than 1000 mainchain-blocks old
+last_committed_block = contract.storage[0]
+last_uncommitted_block = contract.storage[1]
+lcb_storage_index = 2^160 + last_committed_block * 2^40
+while contract.storage[lcb_storage_index + 1] < block.number - 1000 and last_committed_block < last_uncommitted_block:
+    kvpairs = contract.storage[lcb_storage_index]
+    i = 0
+    while i < kvpairs:
+        k = contract.storage[lcb_storage_index + 3 + i * 2]
+        v = contract.storage[lcb_storage_index + 4 + i * 2]
+        contract.storage[sha3(k)] = v
+        i += 1
+    last_committed_block += 1
+    lcb_storage_index += 2^40
+contract.storage[0] = last_committed_block
+    
+
+# Propose block: [ 0, block number, data in block format above ... ]
+if msg.data[0] == 0:
+    blknumber = msg.data[1]
+    # Block number must be correct
+    if blknumber != contract.storage[1]:
+        stop
+    # Deposit requirement
+    if msg.value < 10^19:
+        stop
+    # Store the proposal in storage as 
+    # [ 0, main-chain block number, sender, block data...]
+    start_index = 2^160 + blknumber * 2^40
+    numkvs = (msg.datasize - 2) / 2
+    contract.storage[start_index + 1] = block.number
+    1ontract.storage[start_index + 2] = msg.sender
+    i = 0
+    while i < msg.datasize - 2:
+        contract.storage[start_index + 3 + i] = msg.data[2 + i]
+        i += 1
+    contract.storage[1] = blknumber + 1
+
+# Challenge block: [ 1, b ]
+elif msg.data[0] == 1:
+    blknumber = msg.data[1]
+    txwidth = contract.storage[4]
+    last_uncommitted_block = contract.storage[1]
+    last_committed_block = contract.storage[0]
+    # Cannot challenge nonexistent or committed blocks
+    if blknumber <= last_uncommitted_block or blknumber > last_committed_block:
+        stop
+    # Create a contract to serve as a map that maintains keys and values
+    # temporarily
+    tempstore = create('map.se')
+    contract.storage[3] = tempstore
+    # Unquestioningly apply the state transitions from the last committed block
+    # up to b
+    b = last_committed_block
+    cur_storage_index = 2^160 + last_committed_block * 2^40
+    while b < blknumber:
+        numtxs = contract.storage[cur_storage_index + 3]
+        numkvs = contract.storage[cur_storage_index + 4]
+        kv0index = cur_storage_index + 5 + numtxs * txwidth
+        i = 0
+        while i < numkvs:
+            k = contract.storage[kv0index + i * 2]
+            v = contract.storage[kx0index + i * 2 + 1]
+            call(tempstore, [1, k, v], 3)
+            i += 1
+        b += 1
+        cur_storage_index += 2^40
+    # Run the actual code, and see what state transitions it outputs
+    # The way that the code is expected to work is to:
+    #
+    # (1) take as input the list of transactions (the contract should
+    # use msg.datasize to determine how many txs there are, and it should
+    # be aware of the value of txwidth)
+    # (2) call this contract with [2, k] to read current state data
+    # (3) call this contract with [3, k, v] to write current state data
+    # (4) return as output a list of all state transitions that it made
+    # in the form [kvcount, k1, v1, k2, v2 ... ]
+    #
+    # The reason for separating (2) from (3) is that sometimes the state
+    # transition may end up changing a given key many times, and we don't
+    # need to inefficiently store that in storage
+    numkvs = contract.storage[cur_storage_index + 3]
+    numtxs = contract.storage[cur_storage_index + 4]
+    # Populate input array
+    inpwidth = numtxs * txwidth
+    inp = array(inpwidth)
+    i = 0
+    while i < inpwidth:
+        inp[i] = contract.storage[cur_storage_index + 5 + i]
+        i += 1
+    out = call(contract.storage[2], inp, inpwidth, numkvs * 2 + 1)
+    # Check that the number of state transitions is the same
+    if out[0] != kvcount:
+        send(msg.sender, 10^19)
+        contract.storage[0] = last_committed_block
+        stop
+    kv0index = cur_storage_index + 5 + numtxs * txwidth
+    i = 0
+    while i < kvcount:
+        # Check that each individual state transition matches
+        k = contract.storage[kv0index + i * 2 + 1]
+        v = contract.storage[kv0index + i * 2 + 2]
+        if k != out[i * 2 + 1] or v != out[i * 2 + 2]:
+            send(msg.sender, 10^19)
+            contract.storage[0] = last_committed_block
+            stop
+        i += 1
+    # Suicide tempstore
+    call(tempstore, 2)
+
+
+# Read data [2, k]
+elif msg.data[0] == 2:
+    tempstore = contract.storage[3]
+    o = call(tempstore, [0, msg.data[1]], 2, 2)
+    if o[0]:
+        return(o[1])
+    else:
+        return contract.storage[sha3(msg.data[1])]
+
+# Write data [3, k, v]
+elif msg.data[0] == 3:
+    tempstore = contract.storage[3]
+    call(tempstore, [1, msg.data[1], msg.data[2]], 3, 2)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/fixedpoint.se

@@ -0,0 +1,31 @@
+type f: [a, b, c, d, e]
+
+macro f($a) + f($b):
+    f(add($a, $b))
+
+macro f($a) - f($b):
+    f(sub($a, $b))
+
+macro f($a) * f($b):
+    f(mul($a, $b) / 10000)
+
+macro f($a) / f($b):
+    f(sdiv($a * 10000, $b))
+
+macro f($a) % f($b):
+    f(smod($a, $b))
+
+macro f($v) = f($w):
+    $v = $w
+
+macro unfify(f($a)):
+    $a / 10000
+
+macro fify($a):
+    f($a * 10000)
+
+a = fify(5)
+b = fify(2)
+c = a / b
+e = c + (a / b)
+return(unfify(e))

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/long_integer_macros.se

@@ -0,0 +1,116 @@
+macro smin($a, $b):
+    with $1 = $a:
+        with $2 = $b:
+            if(slt($1, $2), $1, $2)
+
+macro smax($a, $b):
+    with $1 = $a:
+        with $2 = $b:
+            if(slt($1, $2), $2, $1)
+
+def omul(x, y):
+    o = expose(mklong(x) * mklong(y))
+    return(slice(o, 1), o[0]+1)
+
+def oadd(x, y):
+    o = expose(mklong(x) + mklong(y))
+    return(slice(o, 1), o[0]+1)
+
+def osub(x, y):
+    o = expose(mklong(x) - mklong(y))
+    return(slice(o, 1), o[0]+1)
+
+def odiv(x, y):
+    o = expose(mklong(x) / mklong(y))
+    return(slice(o, 1), o[0]+1)
+
+def comb(a:a, b:a, sign):
+    sz = smax(a[0], b[0])
+    msz = smin(a[0], b[0])
+    c = array(sz + 2)
+    c[0] = sz
+    i = 0
+    carry = 0
+    while i < msz:
+        m = a[i + 1] + sign * b[i + 1] + carry
+        c[i + 1] = mod(m + 2^127, 2^128) - 2^127
+        carry = (div(m + 2^127, 2^128) + 2^127) % 2^128 - 2^127
+        i += 1
+    u = if(a[0] > msz, a, b)
+    s = if(a[0] > msz, 1, sign)
+    while i < sz:
+        m = s * u[i + 1] + carry
+        c[i + 1] = mod(m + 2^127, 2^128) - 2^127
+        carry = (div(m + 2^127, 2^128) + 2^127) % 2^128 - 2^127
+        i += 1
+    if carry:
+        c[0] += 1
+        c[sz + 1] = carry
+    return(c, c[0]+1)
+
+def mul(a:a, b:a):
+    c = array(a[0] + b[0] + 2)
+    c[0] = a[0] + b[0]
+    i = 0
+    while i < a[0]:
+        j = 0
+        carry = 0
+        while j < b[0]:
+            m = c[i + j + 1] + a[i + 1] * b[j + 1] + carry
+            c[i + j + 1] = mod(m + 2^127, 2^128) - 2^127
+            carry = (div(m + 2^127, 2^128) + 2^127) % 2^128 - 2^127
+            j += 1
+        if carry:
+            c[0] = a[0] + b[0] + 1
+            c[i + j + 1] += carry
+        i += 1
+    return(c, c[0]+1)
+
+macro long($a) + long($b):
+    long(self.comb($a:$a[0]+1, $b:$b[0]+1, 1, outsz=$a[0]+$b[0]+2))
+
+macro long($a) - long($b):
+    long(self.comb($a:$a[0]+1, $b:$b[0]+1, -1, outsz=$a[0]+$b[0]+2))
+
+macro long($a) * long($b):
+    long(self.mul($a:$a[0]+1, $b:$b[0]+1, outsz=$a[0]+$b[0]+2))
+
+macro long($a) / long($b):
+    long(self.div($a:$a[0]+1, $b:$b[0]+1, outsz=$a[0]+$b[0]+2))
+
+macro mulexpand(long($a), $k, $m):
+    long:
+        with $c = array($a[0]+k+2):
+            $c[0] = $a[0]+$k
+            with i = 0:
+                while i < $a[0]:
+                    v = $a[i+1] * $m + $c[i+$k+1]
+                    $c[i+$k+1] = mod(v + 2^127, 2^128) - 2^127
+                    $c[i+$k+2] = div(v + 2^127, 2^128)
+                    i += 1
+                $c
+
+def div(a:a, b:a):
+    asz = a[0]
+    bsz = b[0]
+    while b[bsz] == 0 and bsz > 0:
+        bsz -= 1
+    c = array(asz+2)
+    c[0] = asz+1
+    while 1:
+        while a[asz] == 0 and asz > 0:
+            asz -= 1
+        if asz < bsz:
+            return(c, c[0]+1)
+        sub = expose(mulexpand(long(b), asz - bsz, a[asz] / b[bsz]))
+        c[asz - bsz+1] = a[asz] / b[bsz]
+        a = expose(long(a) - long(sub))
+        a[asz-1] += 2^128 * a[asz]
+        a[asz] = 0
+        
+macro mklong($i):
+    long([2, mod($i + 2^127, 2^128) - 2^127, div($i + 2^127, 2^128)])
+
+macro expose(long($i)):
+    $i
+

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/mul2.se

@@ -0,0 +1,2 @@
+def double(v):
+    return(v*2)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/mutuala.se

@@ -0,0 +1,187 @@
+# mutuala - subcurrency
+
+# We want to issue a currency that reduces in value as you store it through negative interest.
+# That negative interest would be stored in a commons account.  It's like the p2p version of a
+# capital tax
+
+# the same things goes for transactions - you pay as you use the currency.  However, the more
+# you pay, the more you get to say about what the tax is used for
+
+# each participant can propose a recipient for a payout to be made out of the commons account,
+# others can vote on it by awarding it tax_credits.
+
+# TODO should proposal have expiration timestamp?, after which the tax_credits are refunded
+# TODO multiple proposals can take more credits that available in the Commons, how to handle this
+# TODO how to handle lost accounts, after which no longer possible to get 2/3 majority
+
+shared:
+    COMMONS = 42
+    ADMIN = 666
+    CAPITAL_TAX_PER_DAY = 7305 # 5% per year
+    PAYMENT_TAX = 20 # 5%
+
+    ACCOUNT_LIST_OFFSET = 2^160
+    ACCOUNT_MAP_OFFSET = 2^161
+    PROPOSAL_LIST_OFFSET = 2^162
+    PROPOSAL_MAP_OFFSET = 2^163
+
+init:
+    contract.storage[ADMIN] = msg.sender
+    contract.storage[ACCOUNT_LIST_OFFSET - 1] = 1
+    contract.storage[ACCOUNT_LIST_OFFSET] = msg.sender
+    contract.storage[ACCOUNT_MAP_OFFSET + msg.sender] = 10^12
+    contract.storage[ACCOUNT_MAP_OFFSET + msg.sender + 1] = block.timestamp
+
+# contract.storage[COMMONS] = balance commons
+
+# contract.storage[ACCOUNT_LIST_OFFSET - 1] = number of accounts
+# contract.storage[ACCOUNT_LIST_OFFSET + n] = account n
+
+# contract.storage[PROPOSAL_LIST_OFFSET - 1] contains the number of proposals
+# contract.storage[PROPOSAL_LIST_OFFSET + n] = proposal n
+
+# per account:
+# contract.storage[ACCOUNT_MAP_OFFSET + account] = balance
+# contract.storage[ACCOUNT_MAP_OFFSET + account+1] = timestamp_last_transaction
+# contract.storage[ACCOUNT_MAP_OFFSET + account+2] = tax_credits
+
+# per proposal:
+# contract.storage[PROPOSAL_MAP_OFFSET + proposal_id] = recipient
+# contract.storage[PROPOSAL_MAP_OFFSET + proposal_id+1] = amount
+# contract.storage[PROPOSAL_MAP_OFFSET + proposal_id+2] = total vote credits
+
+code:
+    if msg.data[0] == "suicide" and msg.sender == contract.storage[ADMIN]:
+        suicide(msg.sender)
+
+    elif msg.data[0] == "balance":
+        addr = msg.data[1]
+        return(contract.storage[ACCOUNT_MAP_OFFSET + addr])
+
+    elif msg.data[0] == "pay":
+        from = msg.sender
+        fromvalue = contract.storage[ACCOUNT_MAP_OFFSET + from]
+        to = msg.data[1]
+        if to == 0 or to >= 2^160:
+            return([0, "invalid address"], 2)
+        value = msg.data[2]
+        tax = value / PAYMENT_TAX
+
+        if fromvalue >= value + tax:
+            contract.storage[ACCOUNT_MAP_OFFSET + from] = fromvalue - (value + tax)
+            contract.storage[ACCOUNT_MAP_OFFSET + to] += value
+            # tax
+            contract.storage[COMMONS] += tax
+            contract.storage[ACCOUNT_MAP_OFFSET + from + 2] += tax
+
+            # check timestamp field to see if target account exists
+            if contract.storage[ACCOUNT_MAP_OFFSET + to + 1] == 0:
+                # register new account
+                nr_accounts = contract.storage[ACCOUNT_LIST_OFFSET - 1]
+                contract.storage[ACCOUNT_LIST_OFFSET + nr_accounts] = to
+                contract.storage[ACCOUNT_LIST_OFFSET - 1] += 1
+                contract.storage[ACCOUNT_MAP_OFFSET + to + 1] = block.timestamp
+
+            return(1)
+        else:
+            return([0, "insufficient balance"], 2)
+
+    elif msg.data[0] == "hash":
+        proposal_id = sha3(msg.data[1])
+        return(proposal_id)
+
+    elif msg.data[0] == "propose":
+        from = msg.sender
+        # check if sender has an account and has tax credits
+        if contract.storage[ACCOUNT_MAP_OFFSET + from + 2] == 0:
+            return([0, "sender has no tax credits"], 2)
+
+        proposal_id = sha3(msg.data[1])
+        # check if proposal doesn't already exist
+        if contract.storage[PROPOSAL_MAP_OFFSET + proposal_id]:
+            return([0, "proposal already exists"])
+
+        to = msg.data[2]
+        # check if recipient is a valid address and has an account (with timestamp)
+        if to == 0 or to >= 2^160:
+            return([0, "invalid address"], 2)
+        if contract.storage[ACCOUNT_MAP_OFFSET + to + 1] == 0:
+            return([0, "invalid to account"], 2)
+
+        value = msg.data[3]
+        # check if there is enough money in the commons account
+        if value > contract.storage[COMMONS]:
+            return([0, "not enough credits in commons"], 2)
+
+        # record proposal in list
+        nr_proposals = contract.storage[PROPOSAL_LIST_OFFSET - 1]
+        contract.storage[PROPOSAL_LIST_OFFSET + nr_proposals] = proposal_id
+        contract.storage[PROPOSAL_LIST_OFFSET - 1] += 1
+
+        # record proposal in map
+        contract.storage[PROPOSAL_MAP_OFFSET + proposal_id] = to
+        contract.storage[PROPOSAL_MAP_OFFSET + proposal_id + 1] = value
+
+        return(proposal_id)
+
+    elif msg.data[0] == "vote":
+        from = msg.sender
+        proposal_id = sha3(msg.data[1])
+        value = msg.data[2]
+        # check if sender has an account and has tax credits
+        if value < contract.storage[ACCOUNT_MAP_OFFSET + from + 2]:
+            return([0, "sender doesn't have enough tax credits"], 2)
+
+        # check if proposal exist
+        if contract.storage[PROPOSAL_MAP_OFFSET + proposal_id] == 0:
+            return([0, "proposal doesn't exist"], 2)
+
+        # increase votes
+        contract.storage[PROPOSAL_MAP_OFFSET + proposal_id + 2] += value
+        # withdraw tax credits
+        contract.storage[ACCOUNT_MAP_OFFSET + from + 2] -= value
+
+        # did we reach 2/3 threshold?
+        if contract.storage[PROPOSAL_MAP_OFFSET + proposal_id + 2] >= contract.storage[COMMONS] * 2 / 3:
+            # got majority
+            to = contract.storage[PROPOSAL_MAP_OFFSET + proposal_id]
+            amount = contract.storage[PROPOSAL_MAP_OFFSET + proposal_id + 1]
+
+            # adjust balances
+            contract.storage[ACCOUNT_MAP_OFFSET + to] += amount
+            contract.storage[COMMONS] -= amount
+
+            # reset proposal
+            contract.storage[PROPOSAL_MAP_OFFSET + proposal_id] = 0
+            contract.storage[PROPOSAL_MAP_OFFSET + proposal_id + 1] = 0
+            contract.storage[PROPOSAL_MAP_OFFSET + proposal_id + 2] = 0
+            return(1)
+
+        return(proposal_id)
+
+    elif msg.data[0] == "tick":
+        nr_accounts = contract.storage[ACCOUNT_LIST_OFFSET - 1]
+        account_idx = 0
+        tax_paid = 0
+        # process all accounts and see if they have to pay their daily capital tax
+        while account_idx < nr_accounts:
+            cur_account = contract.storage[ACCOUNT_LIST_OFFSET + account_idx]
+            last_timestamp = contract.storage[ACCOUNT_MAP_OFFSET + cur_account + 1]
+            time_diff = block.timestamp - last_timestamp
+            if time_diff >= 86400:
+                tax_days = time_diff / 86400
+                balance = contract.storage[ACCOUNT_MAP_OFFSET + cur_account]
+                tax = tax_days * (balance / CAPITAL_TAX_PER_DAY)
+                if tax > 0:
+                    # charge capital tax, but give tax credits in return
+                    contract.storage[ACCOUNT_MAP_OFFSET + cur_account] -= tax
+                    contract.storage[ACCOUNT_MAP_OFFSET + cur_account + 1] += tax_days * 86400
+                    contract.storage[ACCOUNT_MAP_OFFSET + cur_account + 2] += tax
+
+                    contract.storage[COMMONS] += tax
+                    tax_paid += 1
+            account_idx += 1
+        return(tax_paid) # how many accounts did we charge tax on
+
+    else:
+        return([0, "unknown command"], 2)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/namecoin.se

@@ -0,0 +1,7 @@
+def register(k, v):
+    if !self.storage[k]: # Is the key not yet taken?
+        # Then take it!
+        self.storage[k] = v
+        return(1)
+    else:
+        return(0) // Otherwise do nothing

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/peano.se

@@ -0,0 +1,43 @@
+macro padd($x, psuc($y)):
+    psuc(padd($x, $y))
+  
+macro padd($x, z()):
+    $x
+  
+macro dec(psuc($x)):
+    dec($x) + 1
+  
+macro dec(z()):
+    0
+  
+macro pmul($x, z()):
+    z()
+  
+macro pmul($x, psuc($y)):
+    padd(pmul($x, $y), $x)
+  
+macro pexp($x, z()):
+    one()
+  
+macro pexp($x, psuc($y)):
+    pmul($x, pexp($x, $y))
+  
+macro fac(z()):
+    one()
+  
+macro fac(psuc($x)):
+    pmul(psuc($x), fac($x))
+  
+macro one():
+    psuc(z())
+  
+macro two():
+    psuc(psuc(z()))
+  
+macro three():
+    psuc(psuc(psuc(z())))
+  
+macro five():
+    padd(three(), two())
+  
+return([dec(pmul(three(), pmul(three(), three()))), dec(fac(five()))], 2)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/returnten.se

@@ -0,0 +1,4 @@
+extern mul2: [double]
+  
+x = create("mul2.se")
+return(x.double(5))

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/schellingcoin/quicksort.se

@@ -0,0 +1,33 @@
+def kall():
+    argcount = ~calldatasize() / 32
+    if argcount == 1:
+        return(~calldataload(1))
+
+    args = array(argcount)
+    ~calldatacopy(args, 1, argcount * 32)
+    low = array(argcount)
+    lsz = 0
+    high = array(argcount)
+    hsz = 0
+    i = 1
+    while i < argcount:
+        if args[i] < args[0]:
+            low[lsz] = args[i]
+            lsz += 1
+        else:
+            high[hsz] = args[i]
+            hsz += 1
+        i += 1
+    low = self.kall(data=low, datasz=lsz, outsz=lsz)
+    high = self.kall(data=high, datasz=hsz, outsz=hsz)
+    o = array(argcount)
+    i = 0
+    while i < lsz:
+        o[i] = low[i]
+        i += 1
+    o[lsz] = args[0]
+    j = 0
+    while j < hsz:
+        o[lsz + 1 + j] = high[j]
+        j += 1
+    return(o, argcount)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/schellingcoin/quicksort_pairs.se

@@ -0,0 +1,46 @@
+# Quicksort pairs
+# eg. input of the form [ 30, 1, 90, 2, 70, 3, 50, 4]
+# outputs [ 30, 1, 50, 4, 70, 3, 90, 2 ]
+#
+# Note: this can be used as a generalized sorting algorithm:
+# map every object to [ key, ref ] where `ref` is the index
+# in memory to all of the properties and `key` is the key to
+# sort by
+
+
+def kall():
+    argcount = ~calldatasize() / 64
+    if argcount == 1:
+        return([~calldataload(1), ~calldataload(33)], 2)
+
+    args = array(argcount * 2)
+    ~calldatacopy(args, 1, argcount * 64)
+    low = array(argcount * 2)
+    lsz = 0
+    high = array(argcount * 2)
+    hsz = 0
+    i = 2
+    while i < argcount * 2:
+        if args[i] < args[0]:
+            low[lsz] = args[i]
+            low[lsz + 1] = args[i + 1]
+            lsz += 2
+        else:
+            high[hsz] = args[i]
+            high[hsz + 1] = args[i + 1]
+            hsz += 2
+        i = i + 2
+    low = self.kall(data=low, datasz=lsz, outsz=lsz)
+    high = self.kall(data=high, datasz=hsz, outsz=hsz)
+    o = array(argcount * 2)
+    i = 0
+    while i < lsz:
+        o[i] = low[i]
+        i += 1
+    o[lsz] = args[0]
+    o[lsz + 1] = args[1]
+    j = 0
+    while j < hsz:
+        o[lsz + 2 + j] = high[j]
+        j += 1
+    return(o, argcount * 2)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/schellingcoin/schellingcoin.se

@@ -0,0 +1,94 @@
+# SchellingCoin implementation
+#
+# Epoch length: 100 blocks
+# Target savings depletion rate: 0.1% per epoch
+
+data epoch
+data hashes_submitted
+data output
+data quicksort_pairs
+data accounts[2^160]
+data submissions[2^80](hash, deposit, address, value)
+extern any: [call]
+
+
+def init():
+    self.epoch = block.number / 100
+    self.quicksort_pairs = create('quicksort_pairs.se')
+
+def any():
+    if block.number / 100 > epoch:
+        # Sort all values submitted
+        N = self.hashes_submitted
+        o = array(N * 2)
+        i = 0
+        j = 0
+        while i < N:
+            v = self.submissions[i].value
+            if v:
+                o[j] = v
+                o[j + 1] = i
+                j += 2
+            i += 1
+        values = self.quicksort_pairs.call(data=o, datasz=j, outsz=j)
+
+        # Calculate total deposit, refund non-submitters and
+        # cleanup
+
+        deposits = array(j / 2)
+        addresses = array(j / 2)
+        
+        i = 0
+        total_deposit = 0
+        while i < j / 2:
+            base_index = HASHES + values[i * 2 + 1] * 3
+            deposits[i] = self.submissions[i].deposit
+            addresses[i] = self.submissions[i].address
+            if self.submissions[values[i * 2 + 1]].value:
+                total_deposit += deposits[i]
+            else:
+                send(addresses[i], deposits[i] * 999 / 1000)
+            i += 1
+
+        inverse_profit_ratio = total_deposit / (contract.balance / 1000) + 1
+
+        # Reward everyone
+        i = 0
+        running_deposit_sum = 0
+        halfway_passed = 0
+        while i < j / 2:
+            new_deposit_sum = running_deposit_sum + deposits[i]
+            if new_deposit_sum > total_deposit / 4 and running_deposit_sum < total_deposit * 3 / 4:
+                send(addresses[i], deposits[i] + deposits[i] / inverse_profit_ratio * 2)
+            else:
+                send(addresses[i], deposits[i] - deposits[i] / inverse_profit_ratio)
+
+            if not halfway_passed and new_deposit_sum > total_deposit / 2:
+                self.output = self.submissions[i].value
+                halfway_passed = 1
+            self.submissions[i].value = 0
+            running_deposit_sum = new_deposit_sum
+            i += 1
+        self.epoch = block.number / 100
+        self.hashes_submitted = 0
+        
+def submit_hash(h):
+    if block.number % 100 < 50:
+        cur = self.hashes_submitted
+        pos = HASHES + cur * 3
+        self.submissions[cur].hash = h
+        self.submissions[cur].deposit = msg.value
+        self.submissions[cur].address = msg.sender
+        self.hashes_submitted = cur + 1
+        return(cur)
+
+def submit_value(index, v):
+    if sha3([msg.sender, v], 2) == self.submissions[index].hash:
+            self.submissions[index].value = v
+            return(1)
+
+def request_balance():
+    return(contract.balance)
+
+def request_output():
+    return(self.output)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/schellingcoin/schellingdollar.se

@@ -0,0 +1,171 @@
+# Hedged zero-supply dollar implementation
+# Uses SchellingCoin as price-determining backend
+#
+# Stored variables:
+#
+# 0: Schelling coin contract
+# 1: Last epoch
+# 2: Genesis block of contract
+# 3: USD exposure
+# 4: ETH exposure
+# 5: Cached price
+# 6: Last interest rate
+# 2^160 + k: interest rate accumulator at k epochs
+# 2^161 + ADDR * 3: eth-balance of a particular address
+# 2^161 + ADDR * 3 + 1: usd-balance of a particular address
+# 2^161 + ADDR * 3 + 1: last accessed epoch of a particular address
+#
+# Transaction types:
+#
+# [1, to, val]: send ETH
+# [2, to, val]: send USD
+# [3, wei_amount]: convert ETH to USD
+# [4, usd_amount]: converts USD to ETH
+# [5]: deposit
+# [6, amount]: withdraw
+# [7]: my balance query
+# [7, acct]: balance query for any acct
+# [8]: global state query
+# [9]: liquidation test any account
+#
+# The purpose of the contract is to serve as a sort of cryptographic
+# bank account where users can store both ETH and USD. ETH must be
+# stored in zero or positive quantities, but USD balances can be
+# positive or negative. If the USD balance is negative, the invariant
+# usdbal * 10 >= ethbal * 9 must be satisfied; if any account falls
+# below this value, then that account's balances are zeroed. Note
+# that there is a 2% bounty to ping the app if an account does go
+# below zero; one weakness is that if no one does ping then it is
+# quite possible for accounts to go negative-net-worth, then zero
+# themselves out, draining the reserves of the "bank" and potentially
+# bankrupting it. A 0.1% fee on ETH <-> USD trade is charged to
+# minimize this risk. Additionally, the bank itself will inevitably
+# end up with positive or negative USD exposure; to mitigate this,
+# it automatically updates interest rates on USD to keep exposure
+# near zero.
+
+data schelling_coin
+data last_epoch
+data starting_block
+data usd_exposure
+data eth_exposure
+data price
+data last_interest_rate
+data interest_rate_accum[2^50]
+data accounts[2^160](eth, usd, last_epoch)
+
+extern sc: [submit_hash, submit_value, request_balance, request_output]
+
+def init():
+    self.schelling_coin = create('schellingcoin.se')
+    self.price = self.schelling_coin.request_output()
+    self.interest_rate_accum[0] = 10^18
+    self.starting_block = block.number
+
+def any():
+    sender = msg.sender
+    epoch = (block.number - self.starting_block) / 100
+    last_epoch = self.last_epoch
+    usdprice = self.price
+
+    # Update contract epochs
+    if epoch > last_epoch:
+        delta = epoch - last_epoch
+        last_interest_rate = self.last_interest_rate
+        usd_exposure - self.usd_exposure
+        last_accum = self.interest_rate_accum[last_epoch]
+
+        if usd_exposure < 0:
+            self.last_interest_rate = last_interest_rate - 10000 * delta
+        elif usd_exposure > 0:
+            self.last_interest_rate = last_interest_rate + 10000 * delta
+        
+        self.interest_rate_accum[epoch] = last_accum + last_accum * last_interest_rate * delta / 10^9
+
+        # Proceeds go to support the SchellingCoin feeding it price data, ultimately providing the depositors
+        # of the SchellingCoin an interest rate
+        bal = max(self.balance - self.eth_exposure, 0) / 10000
+        usdprice = self.schelling_coin.request_output()
+        self.price = usdprice
+        self.last_epoch = epoch
+
+    ethbal = self.accounts[msg.sender].eth
+    usdbal = self.accounts[msg.sender].usd
+
+    # Apply interest rates to sender and liquidation-test self
+    if msg.sender != self:
+        self.ping(self)
+    
+def send_eth(to, value):
+    if value > 0 and value <= ethbal and usdbal * usdprice * 2 + (ethbal - value) >= 0:
+        self.accounts[msg.sender].eth = ethbal - value
+        self.ping(to)
+        self.accounts[to].eth += value
+        return(1)
+
+def send_usd(to, value):
+    if value > 0 and value <= usdbal and (usdbal - value) * usdprice * 2 + ethbal >= 0:
+        self.accounts[msg.sender].usd = usdbal - value
+        self.ping(to)
+        self.accounts[to].usd += value
+        return(1)
+
+def convert_to_eth(usdvalue):
+    ethplus = usdvalue * usdprice * 999 / 1000
+    if usdvalue > 0 and (usdbal - usdvalue) * usdprice * 2 + (ethbal + ethplus) >= 0:
+        self.accounts[msg.sender].eth = ethbal + ethplus
+        self.accounts[msg.sender].usd = usdbal - usdvalue
+        self.eth_exposure += ethplus
+        self.usd_exposure -= usdvalue
+        return([ethbal + ethplus, usdbal - usdvalue], 2)
+
+def convert_to_usd(ethvalue):
+    usdplus = ethvalue / usdprice * 999 / 1000
+    if ethvalue > 0 and (usdbal + usdplus) * usdprice * 2 + (ethbal - ethvalue) >= 0:
+        self.accounts[msg.sender].eth = ethbal - ethvalue
+        self.accounts[msg.sender].usd = usdbal + usdplus
+        self.eth_exposure -= ethvalue
+        self.usd_exposure += usdplus
+        return([ethbal - ethvalue, usdbal + usdplus], 2)
+
+def deposit():
+    self.accounts[msg.sender].eth = ethbal + msg.value
+    self.eth_exposure += msg.value
+    return(ethbal + msg.value)
+
+def withdraw(value):
+    if value > 0 and value <= ethbal and usdbal * usdprice * 2 + (ethbal - value) >= 0:
+        self.accounts[msg.sender].eth -= value
+        self.eth_exposure -= value
+        return(ethbal - value)
+
+def balance(acct):
+    self.ping(acct)
+    return([self.accounts[acct].eth, self.accounts[acct].usd], 2)
+
+def global_state_query(acct):
+    interest = self.last_interest_rate
+    usd_exposure = self.usd_exposure
+    eth_exposure = self.eth_exposure
+    eth_balance = self.balance
+    return([epoch, usdprice, interest, usd_exposure, eth_exposure, eth_balance], 6)
+
+def ping(acct):
+    account_last_epoch = self.accounts[acct].last_epoch
+    if account_last_epoch != epoch:
+        cur_usd_balance = self.accounts[acct].usd
+        new_usd_balance = cur_usd_balance * self.interest_rate_accum[epoch] / self.interest_rate_accum[account_last_epoch]
+        self.accounts[acct].usd = new_usd_balance
+        self.accounts[acct].last_epoch = epoch
+        self.usd_exposure += new_usd_balance - cur_usd_balance
+        
+        ethbal = self.accounts[acct].eth
+
+        if new_usd_balance * usdval * 10 + ethbal * 9 < 0:
+            self.accounts[acct].eth = 0
+            self.accounts[acct].usd = 0
+            self.accounts[msg.sender].eth += ethbal / 50
+            self.eth_exposure += -ethbal + ethbal / 50
+            self.usd_exposure += new_usd_balance
+            return(1)
+        return(0)

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/schellinghelper.se

@@ -0,0 +1 @@
+return(sha3([msg.sender, msg.data[0]], 2))

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/short_namecoin.se

@@ -0,0 +1,3 @@
+def register(k, v):
+    if !self.storage[k]:
+        self.storage[k] = v

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/examples/subcurrency.se

@@ -0,0 +1,11 @@
+def init():
+    self.storage[msg.sender] = 1000000
+
+def balance_query(k):
+    return(self.storage[addr])
+
+def send(to, value):
+    fromvalue = self.storage[msg.sender]
+    if fromvalue >= value:
+        self.storage[from] = fromvalue - value
+        self.storage[to] += value

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/funcs.cpp

@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <iostream>
+#include <vector>
+#include "funcs.h"
+#include "bignum.h"
+#include "util.h"
+#include "parser.h"
+#include "lllparser.h"
+#include "compiler.h"
+#include "rewriter.h"
+#include "tokenize.h"
+
+Node compileToLLL(std::string input) {
+    return rewrite(parseSerpent(input));
+}
+
+Node compileChunkToLLL(std::string input) {
+    return rewriteChunk(parseSerpent(input));
+}
+
+std::string compile(std::string input) {
+    return compileLLL(compileToLLL(input));
+}
+
+std::vector<Node> prettyCompile(std::string input) {
+    return prettyCompileLLL(compileToLLL(input));
+}
+
+std::string compileChunk(std::string input) {
+    return compileLLL(compileChunkToLLL(input));
+}
+
+std::vector<Node> prettyCompileChunk(std::string input) {
+    return prettyCompileLLL(compileChunkToLLL(input));
+}

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/funcs.h

@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <iostream>
+#include <vector>
+#include "bignum.h"
+#include "util.h"
+#include "parser.h"
+#include "lllparser.h"
+#include "compiler.h"
+#include "rewriter.h"
+#include "tokenize.h"
+
+// Function listing:
+//
+// parseSerpent      (serpent -> AST)      std::string -> Node
+// parseLLL          (LLL -> AST)          std::string -> Node
+// rewrite           (apply rewrite rules) Node -> Node
+// compileToLLL      (serpent -> LLL)      std::string -> Node
+// compileLLL        (LLL -> EVMhex)       Node -> std::string
+// prettyCompileLLL  (LLL -> EVMasm)       Node -> std::vector<Node>
+// prettyCompile     (serpent -> EVMasm)   std::string -> std::vector>Node>
+// compile           (serpent -> EVMhex)   std::string -> std::string
+// get_file_contents (filename -> file)    std::string -> std::string
+// exists            (does file exist?)    std::string -> bool
+
+Node compileToLLL(std::string input);
+
+Node compileChunkToLLL(std::string input);
+
+std::string compile(std::string input);
+
+std::vector<Node> prettyCompile(std::string input);
+
+std::string compileChunk(std::string input);
+
+std::vector<Node> prettyCompileChunk(std::string input);

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/functions.cpp

@@ -0,0 +1,203 @@
+#include <stdio.h>
+#include <iostream>
+#include <vector>
+#include <map>
+#include "util.h"
+#include "lllparser.h"
+#include "bignum.h"
+#include "optimize.h"
+#include "rewriteutils.h"
+#include "preprocess.h"
+#include "functions.h"
+
+std::string getSignature(std::vector<Node> args) {
+    std::string o;
+    for (unsigned i = 0; i < args.size(); i++) {
+        if (args[i].val == ":" && args[i].args[1].val == "s")
+            o += "s";
+        else if (args[i].val == ":" && args[i].args[1].val == "a")
+            o += "a";
+        else
+            o += "i";
+    }
+    return o;
+}
+
+// Convert a list of arguments into a node containing a
+// < datastart, datasz > pair
+
+Node packArguments(std::vector<Node> args, std::string sig,
+                      int funId, Metadata m) {
+    // Plain old 32 byte arguments
+    std::vector<Node> nargs;
+    // Variable-sized arguments
+    std::vector<Node> vargs;
+    // Variable sizes
+    std::vector<Node> sizes;
+    // Is a variable an array?
+    std::vector<bool> isArray;
+    // Fill up above three argument lists
+    int argCount = 0;
+    for (unsigned i = 0; i < args.size(); i++) {
+        Metadata m = args[i].metadata;
+        if (args[i].val == "=") {
+            // do nothing
+        }
+        else {
+            // Determine the correct argument type
+            char argType;
+            if (sig.size() > 0) {
+                if (argCount >= (signed)sig.size())
+                    err("Too many args", m);
+                argType = sig[argCount];
+            }
+            else argType = 'i';
+            // Integer (also usable for short strings)
+            if (argType == 'i') {
+                if (args[i].val == ":")
+                    err("Function asks for int, provided string or array", m);
+                nargs.push_back(args[i]);
+            }
+            // Long string
+            else if (argType == 's') {
+                if (args[i].val != ":")
+                    err("Must specify string length", m);
+                vargs.push_back(args[i].args[0]);
+                sizes.push_back(args[i].args[1]);
+                isArray.push_back(false);
+            }
+            // Array
+            else if (argType == 'a') {
+                if (args[i].val != ":")
+                    err("Must specify array length", m);
+                vargs.push_back(args[i].args[0]);
+                sizes.push_back(args[i].args[1]);
+                isArray.push_back(true);
+            }
+            else err("Invalid arg type in signature", m);
+            argCount++;
+        }
+    }
+    int static_arg_size = 1 + (vargs.size() + nargs.size()) * 32;
+    // Start off by saving the size variables and calculating the total
+    msn kwargs;
+    kwargs["funid"] = tkn(utd(funId), m);
+    std::string pattern =
+        "(with _sztot "+utd(static_arg_size)+"                            "
+        "    (with _sizes (alloc "+utd(sizes.size() * 32)+")              "
+        "        (seq                                                     ";
+    for (unsigned i = 0; i < sizes.size(); i++) {
+        std::string sizeIncrement = 
+            isArray[i] ? "(mul 32 _x)" : "_x";
+        pattern +=
+            "(with _x $sz"+utd(i)+"(seq                                   "
+            "    (mstore (add _sizes "+utd(i * 32)+") _x)                 "
+            "    (set _sztot (add _sztot "+sizeIncrement+" ))))           ";
+        kwargs["sz"+utd(i)] = sizes[i];
+    }
+    // Allocate memory, and set first data byte
+    pattern +=
+            "(with _datastart (alloc (add _sztot 32)) (seq                "
+            "    (mstore8 _datastart $funid)                              ";
+    // Copy over size variables
+    for (unsigned i = 0; i < sizes.size(); i++) {
+        int v = 1 + i * 32;
+        pattern +=
+            "    (mstore                                                  "
+            "          (add _datastart "+utd(v)+")                        "
+            "          (mload (add _sizes "+utd(v-1)+")))                 ";
+    }
+    // Store normal arguments
+    for (unsigned i = 0; i < nargs.size(); i++) {
+        int v = 1 + (i + sizes.size()) * 32;
+        pattern +=
+            "    (mstore (add _datastart "+utd(v)+") $"+utd(i)+")         ";
+        kwargs[utd(i)] = nargs[i];
+    }
+    // Loop through variable-sized arguments, store them
+    pattern += 
+            "    (with _pos (add _datastart "+utd(static_arg_size)+") (seq";
+    for (unsigned i = 0; i < vargs.size(); i++) {
+        std::string copySize =
+            isArray[i] ? "(mul 32 (mload (add _sizes "+utd(i * 32)+")))"
+                       : "(mload (add _sizes "+utd(i * 32)+"))";
+        pattern +=
+            "        (unsafe_mcopy _pos $vl"+utd(i)+" "+copySize+")       "
+            "        (set _pos (add _pos "+copySize+"))                   ";
+        kwargs["vl"+utd(i)] = vargs[i];
+    }
+    // Return a 2-item array containing the start and size
+    pattern += "     (array_lit _datastart _sztot))))))))";
+    std::string prefix = "_temp_"+mkUniqueToken();
+    // Fill in pattern, return triple
+    return subst(parseLLL(pattern), kwargs, prefix, m);
+}
+
+// Create a node for argument unpacking
+Node unpackArguments(std::vector<Node> vars, Metadata m) {
+    std::vector<std::string> varNames;
+    std::vector<std::string> longVarNames;
+    std::vector<bool> longVarIsArray;
+    // Fill in variable and long variable names, as well as which
+    // long variables are arrays and which are strings
+    for (unsigned i = 0; i < vars.size(); i++) {
+        if (vars[i].val == ":") {
+            if (vars[i].args.size() != 2)
+                err("Malformed def!", m);
+            longVarNames.push_back(vars[i].args[0].val);
+            std::string tag = vars[i].args[1].val;
+            if (tag == "s")
+                longVarIsArray.push_back(false);
+            else if (tag == "a")
+                longVarIsArray.push_back(true);
+            else
+                err("Function value can only be string or array", m);
+        }
+        else {
+            varNames.push_back(vars[i].val);
+        }
+    }
+    std::vector<Node> sub;
+    if (!varNames.size() && !longVarNames.size()) {
+        // do nothing if we have no arguments
+    }
+    else {
+        std::vector<Node> varNodes;
+        for (unsigned i = 0; i < longVarNames.size(); i++)
+            varNodes.push_back(token(longVarNames[i], m));
+        for (unsigned i = 0; i < varNames.size(); i++)
+            varNodes.push_back(token(varNames[i], m));
+        // Copy over variable lengths and short variables
+        for (unsigned i = 0; i < varNodes.size(); i++) {
+            int pos = 1 + i * 32;
+            std::string prefix = (i < longVarNames.size()) ? "_len_" : "";
+            sub.push_back(asn("untyped", asn("set",
+                              token(prefix+varNodes[i].val, m),
+                              asn("calldataload", tkn(utd(pos), m), m),
+                              m)));
+        }
+        // Copy over long variables
+        if (longVarNames.size() > 0) {
+            std::vector<Node> sub2;
+            int pos = varNodes.size() * 32 + 1;
+            Node tot = tkn("_tot", m);
+            for (unsigned i = 0; i < longVarNames.size(); i++) {
+                Node var = tkn(longVarNames[i], m);
+                Node varlen = longVarIsArray[i] 
+                    ? asn("mul", tkn("32", m), tkn("_len_"+longVarNames[i], m))
+                    : tkn("_len_"+longVarNames[i], m);
+                sub2.push_back(asn("untyped",
+                                   asn("set", var, asn("alloc", varlen))));
+                sub2.push_back(asn("calldatacopy", var, tot, varlen));
+                sub2.push_back(asn("set", tot, asn("add", tot, varlen)));
+            }
+            std::string prefix = "_temp_"+mkUniqueToken();
+            sub.push_back(subst(
+                astnode("with", tot, tkn(utd(pos), m), asn("seq", sub2)),
+                msn(),
+                prefix,
+                m));
+        }
+    }
+    return asn("seq", sub, m);
+}

Godeps/_workspace/src/github.com/ethereum/serpent-go/serpent/functions.h

@@ -0,0 +1,39 @@
+#ifndef ETHSERP_FUNCTIONS
+#define ETHSERP_FUNCTIONS
+
+#include <stdio.h>
+#include <iostream>
+#include <vector>
+#include <map>
+#include "util.h"
+#include "lllparser.h"
+#include "bignum.h"
+#include "optimize.h"
+#include "rewriteutils.h"
+#include "preprocess.h"
+
+
+class argPack {
+    public:
+        argPack(Node a, Node b, Node c) {
+            pre = a;
+            datastart = b;
+            datasz = c;
+        }
+    Node pre;
+    Node datastart;
+    Node datasz;
+};
+
+// Get a signature from a function
+std::string getSignature(std::vector<Node> args);
+
+// Convert a list of arguments into a <pre, mstart, msize> node
+// triple, given the signature of a function
+Node packArguments(std::vector<Node> args, std::string sig,
+                   int funId, Metadata m);
+
+// Create a node for argument unpacking
+Node unpackArguments(std::vector<Node> vars, Metadata m);
+
+#endif