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69 lines
1.5 KiB
69 lines
1.5 KiB
// Copyright 2014 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 trie
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import (
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"bytes"
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"math"
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)
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// Helper function for comparing slices
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func CompareIntSlice(a, b []int) bool {
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if len(a) != len(b) {
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return false
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}
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for i, v := range a {
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if v != b[i] {
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return false
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}
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}
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return true
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}
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// Returns the amount of nibbles that match each other from 0 ...
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func MatchingNibbleLength(a, b []byte) int {
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var i, length = 0, int(math.Min(float64(len(a)), float64(len(b))))
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for i < length {
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if a[i] != b[i] {
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break
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}
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i++
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}
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return i
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}
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func HasTerm(s []byte) bool {
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return s[len(s)-1] == 16
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}
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func RemTerm(s []byte) []byte {
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if HasTerm(s) {
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return s[:len(s)-1]
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}
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return s
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}
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func BeginsWith(a, b []byte) bool {
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if len(b) > len(a) {
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return false
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}
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return bytes.Equal(a[:len(b)], b)
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}
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