forked from mirror/go-ethereum
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
1.5 KiB
69 lines
1.5 KiB
// Copyright 2014 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package trie
|
|
|
|
import (
|
|
"bytes"
|
|
"math"
|
|
)
|
|
|
|
// Helper function for comparing slices
|
|
func CompareIntSlice(a, b []int) bool {
|
|
if len(a) != len(b) {
|
|
return false
|
|
}
|
|
for i, v := range a {
|
|
if v != b[i] {
|
|
return false
|
|
}
|
|
}
|
|
return true
|
|
}
|
|
|
|
// Returns the amount of nibbles that match each other from 0 ...
|
|
func MatchingNibbleLength(a, b []byte) int {
|
|
var i, length = 0, int(math.Min(float64(len(a)), float64(len(b))))
|
|
|
|
for i < length {
|
|
if a[i] != b[i] {
|
|
break
|
|
}
|
|
i++
|
|
}
|
|
|
|
return i
|
|
}
|
|
|
|
func HasTerm(s []byte) bool {
|
|
return s[len(s)-1] == 16
|
|
}
|
|
|
|
func RemTerm(s []byte) []byte {
|
|
if HasTerm(s) {
|
|
return s[:len(s)-1]
|
|
}
|
|
|
|
return s
|
|
}
|
|
|
|
func BeginsWith(a, b []byte) bool {
|
|
if len(b) > len(a) {
|
|
return false
|
|
}
|
|
|
|
return bytes.Equal(a[:len(b)], b)
|
|
}
|
|
|