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110 lines
2.5 KiB
110 lines
2.5 KiB
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package errs
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import (
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"fmt"
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"github.com/ethereum/go-ethereum/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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)
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/*
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Errors implements an error handler providing standardised errors for a package.
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Fields:
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Errors:
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a map from error codes to description
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Package:
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name of the package/component
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Level:
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a function mapping error code to logger.LogLevel (severity)
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if not given, errors default to logger.InfoLevel
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*/
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type Errors struct {
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Errors map[int]string
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Package string
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Level func(code int) logger.LogLevel
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}
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/*
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Error implements the standard go error interface.
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errors.New(code, format, params ...interface{})
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Prints as:
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[package] description: details
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where details is fmt.Sprintf(self.format, self.params...)
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*/
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type Error struct {
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Code int
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Name string
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Package string
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level logger.LogLevel
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message string
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format string
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params []interface{}
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}
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func (self *Errors) New(code int, format string, params ...interface{}) *Error {
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name, ok := self.Errors[code]
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if !ok {
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panic("invalid error code")
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}
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level := logger.InfoLevel
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if self.Level != nil {
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level = self.Level(code)
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}
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return &Error{
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Code: code,
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Name: name,
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Package: self.Package,
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level: level,
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format: format,
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params: params,
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}
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}
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func (self Error) Error() (message string) {
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if len(message) == 0 {
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self.message = fmt.Sprintf("[%s] ERROR: %s", self.Package, self.Name)
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if self.format != "" {
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self.message += ": " + fmt.Sprintf(self.format, self.params...)
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}
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}
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return self.message
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}
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func (self Error) Log(v glog.Verbose) {
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if v {
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v.Infoln(self)
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}
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}
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/*
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err.Fatal() is true if err's severity level is 0 or 1 (logger.ErrorLevel or logger.Silence)
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*/
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func (self *Error) Fatal() (fatal bool) {
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if self.level < logger.WarnLevel {
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fatal = true
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}
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return
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}
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