fumiama/go-base16384
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mirror of https://github.com/fumiama/go-base16384.git synced 2026-06-05 00:32:52 +08:00
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speed up & add more api

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源文雨
2022-04-22 10:32:20 +08:00
parent 851f9f8666
commit 6885586cff
2 changed files with 62 additions and 50 deletions
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96
base14.go
View File

@@ -42,17 +42,19 @@ func Encode(b []byte) (encd []byte) {
encd = make([]byte, outlen)
var n int
i := 0
b = append(b, 0)
for ; i <= len(b)-7; i += 7 {
sum := 0x000000000000003f & ((uint64)(b[i]) >> 2)
sum |= (((uint64)(b[i+1]) << 6) | ((uint64)(b[i]) << 14)) & 0x000000000000ff00
sum |= (((uint64)(b[i+1]) << 20) | ((uint64)(b[i+2]) << 12)) & 0x00000000003f0000
sum |= (((uint64)(b[i+2]) << 28) | ((uint64)(b[i+3]) << 20)) & 0x00000000ff000000
sum |= (((uint64)(b[i+3]) << 34) | ((uint64)(b[i+4]) << 26)) & 0x0000003f00000000
sum |= (((uint64)(b[i+4]) << 42) | ((uint64)(b[i+5]) << 34)) & 0x0000ff0000000000
sum |= ((uint64)(b[i+5]) << 48) & 0x003f000000000000
sum |= ((uint64)(b[i+6]) << 56) & 0xff00000000000000
sum += 0x004e004e004e004e
binary.LittleEndian.PutUint64(encd[n:], sum)
shift := binary.BigEndian.Uint64(b[i:]) >> 2
sum := shift
sum &= 0x3fff000000000000
shift >>= 2
sum |= shift & 0x00003fff00000000
shift >>= 2
sum |= shift & 0x000000003fff0000
shift >>= 2
sum |= shift & 0x0000000000003fff
sum += 0x4e004e004e004e00
binary.BigEndian.PutUint64(encd[n:], sum)
n += 8
}
if offset > 0 {
@@ -108,17 +110,19 @@ func EncodeTo(b, encd []byte) error {
}
var n int
i := 0
b = append(b, 0)
for ; i <= len(b)-7; i += 7 {
sum := 0x000000000000003f & ((uint64)(b[i]) >> 2)
sum |= (((uint64)(b[i+1]) << 6) | ((uint64)(b[i]) << 14)) & 0x000000000000ff00
sum |= (((uint64)(b[i+1]) << 20) | ((uint64)(b[i+2]) << 12)) & 0x00000000003f0000
sum |= (((uint64)(b[i+2]) << 28) | ((uint64)(b[i+3]) << 20)) & 0x00000000ff000000
sum |= (((uint64)(b[i+3]) << 34) | ((uint64)(b[i+4]) << 26)) & 0x0000003f00000000
sum |= (((uint64)(b[i+4]) << 42) | ((uint64)(b[i+5]) << 34)) & 0x0000ff0000000000
sum |= ((uint64)(b[i+5]) << 48) & 0x003f000000000000
sum |= ((uint64)(b[i+6]) << 56) & 0xff00000000000000
sum += 0x004e004e004e004e
binary.LittleEndian.PutUint64(encd[n:], sum)
shift := binary.BigEndian.Uint64(b[i:]) >> 2
sum := shift
sum &= 0x3fff000000000000
shift >>= 2
sum |= shift & 0x00003fff00000000
shift >>= 2
sum |= shift & 0x000000003fff0000
shift >>= 2
sum |= shift & 0x0000000000003fff
sum += 0x4e004e004e004e00
binary.BigEndian.PutUint64(encd[n:], sum)
n += 8
}
if offset > 0 {
@@ -195,21 +199,17 @@ func Decode(b []byte) (decd []byte) {
var n uintptr
i := 0
for ; i <= outlen-7; n += 8 {
sum := binary.LittleEndian.Uint64(b[n:]) - 0x004e004e004e004e
decd[i] = byte(((sum & 0x000000000000003f) << 2) | ((sum & 0x000000000000c000) >> 14))
i++
decd[i] = byte(((sum & 0x0000000000003f00) >> 6) | ((sum & 0x0000000000300000) >> 20))
i++
decd[i] = byte(((sum & 0x00000000000f0000) >> 12) | ((sum & 0x00000000f0000000) >> 28))
i++
decd[i] = byte(((sum & 0x000000000f000000) >> 20) | ((sum & 0x0000003c00000000) >> 34))
i++
decd[i] = byte(((sum & 0x0000000300000000) >> 26) | ((sum & 0x0000fc0000000000) >> 42))
i++
decd[i] = byte(((sum & 0x0000030000000000) >> 34) | ((sum & 0x003f000000000000) >> 48))
i++
decd[i] = byte(((sum & 0xff00000000000000) >> 56))
i++
shift := binary.BigEndian.Uint64(b[n:]) - 0x4e004e004e004e00
shift <<= 2
sum := shift & 0xfffc000000000000
shift <<= 2
sum |= shift & 0x0003fff000000000
shift <<= 2
sum |= shift & 0x0000000fffc00000
shift <<= 2
sum |= shift & 0x00000000003fff00
binary.BigEndian.PutUint64(decd[i:], sum)
i += 7
}
if offset > 0 {
var tmp [8]byte
@@ -269,21 +269,17 @@ func DecodeTo(b []byte, decd []byte) error {
var n uintptr
i := 0
for ; i <= outlen-7; n += 8 {
sum := binary.LittleEndian.Uint64(b[n:]) - 0x004e004e004e004e
decd[i] = byte(((sum & 0x000000000000003f) << 2) | ((sum & 0x000000000000c000) >> 14))
i++
decd[i] = byte(((sum & 0x0000000000003f00) >> 6) | ((sum & 0x0000000000300000) >> 20))
i++
decd[i] = byte(((sum & 0x00000000000f0000) >> 12) | ((sum & 0x00000000f0000000) >> 28))
i++
decd[i] = byte(((sum & 0x000000000f000000) >> 20) | ((sum & 0x0000003c00000000) >> 34))
i++
decd[i] = byte(((sum & 0x0000000300000000) >> 26) | ((sum & 0x0000fc0000000000) >> 42))
i++
decd[i] = byte(((sum & 0x0000030000000000) >> 34) | ((sum & 0x003f000000000000) >> 48))
i++
decd[i] = byte(((sum & 0xff00000000000000) >> 56))
i++
shift := binary.BigEndian.Uint64(b[n:]) - 0x4e004e004e004e00
shift <<= 2
sum := shift & 0xfffc000000000000
shift <<= 2
sum |= shift & 0x0003fff000000000
shift <<= 2
sum |= shift & 0x0000000fffc00000
shift <<= 2
sum |= shift & 0x00000000003fff00
binary.BigEndian.PutUint64(decd[i:], sum)
i += 7
}
if offset > 0 {
var tmp [8]byte

16
conv.go
View File

@@ -16,6 +16,14 @@ func UTF82UTF16BE(b []byte) ([]byte, error) {
return format.NewEncoder().Bytes(b)
}
func EncodeToString(b []byte) string {
out, err := UTF16BE2UTF8(Encode(b))
if err != nil {
return ""
}
return BytesToString(out)
}
func EncodeFromString(s string) []byte {
return Encode(StringToBytes(s))
}
@@ -32,6 +40,14 @@ func DecodeToString(d []byte) string {
return BytesToString(Decode(d))
}
func DecodeFromString(s string) []byte {
d, err := UTF82UTF16BE(StringToBytes(s))
if err != nil {
return nil
}
return Decode(d)
}
func DecodeString(s string) string {
d, err := UTF82UTF16BE(StringToBytes(s))
if err != nil {