P2Pool/monero-base58
P2Pool/monero-base58
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Allow preallocated encode, match 18ecc51ae61e777d1f855aa4351541b664e21734 upstream

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This commit is contained in:
DataHoarder 2023-08-26 11:52:26 +02:00
parent 3e013d432d
commit 2b2aa76694
Signed by: DataHoarder
SSH key fingerprint: SHA256:OLTRf6Fl87G52SiR7sWLGNzlJt4WOX+tfI2yxo0z7xk
1 changed files with 19 additions and 10 deletions
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29
base58.go
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@ -59,7 +59,7 @@ func encodeChunkTail(raw []byte, buf []byte) []byte {
return buf
}
func decodeChunk(buf []byte, encoded string) []byte {
func decodeChunk(buf []byte, encoded []byte) []byte {
var intResult uint64
currentMultiplier := uint64(1)
for i := len(encoded) - 1; i >= 0; i-- {
@ -94,32 +94,41 @@ func decodeChunk(buf []byte, encoded string) []byte {
return nil
}
func Encode(data ...[]byte) string {
func EncodeMoneroBase58(data ...[]byte) []byte {
return EncodeMoneroBase58PreAllocated(make([]byte, 0, func() (result int) {
for _, v := range data {
result += len(v)
}
return
}()), data...)
}
func EncodeMoneroBase58PreAllocated(buf []byte, data ...[]byte) []byte {
//preallocate common case
combined := make([]byte, 0, 96)
for _, item := range data {
combined = append(combined, item...)
}
result := make([]byte, 0, len(combined)*2)
buf := make([]byte, 0, len(combined)*2)
result := buf
tmpBuf := make([]byte, 0, len(combined)*2)
length := len(combined)
rounds := length / 8
for i := 0; i < rounds; i++ {
result = append(result, encodeChunk(combined[i*8:(i+1)*8], buf[:0])...)
result = append(result, encodeChunk(combined[i*8:(i+1)*8], tmpBuf[:0])...)
}
if length%8 > 0 {
result = append(result, encodeChunkTail(combined[rounds*8:], buf[:0])...)
result = append(result, encodeChunkTail(combined[rounds*8:], tmpBuf[:0])...)
}
return string(result)
return result
}
func Decode(data string) (result []byte) {
func DecodeMoneroBase58(data []byte) (result []byte) {
//common case
return DecodePreAllocated(make([]byte, 0, 69), data)
return DecodeMoneroBase58PreAllocated(make([]byte, 0, 69), data)
}
func DecodePreAllocated(buf []byte, data string) (result []byte) {
func DecodeMoneroBase58PreAllocated(buf []byte, data []byte) (result []byte) {
result = buf
length := len(data)
rounds := length / 11