fumiama/go-base16384
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适配所有架构

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fumiama
2022-02-10 13:58:39 +08:00
parent 86dc5b5b23
commit d84411a4ef
6 changed files with 37 additions and 78 deletions
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28
base14.go
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@@ -1,20 +1,14 @@
// +build amd64 arm64 ppc64le mips64le 386 arm mipsle
// Package base14 base16384 的 go 接口
package base14
import (
"unsafe"
"github.com/wdvxdr1123/ZeroBot/utils/helper"
)
import "encoding/binary"
func EncodeString(s string) []byte {
return Encode(helper.StringToBytes(s))
return Encode(StringToBytes(s))
}
func DecodeString(d []byte) string {
return helper.BytesToString(Decode(d))
return BytesToString(Decode(d))
}
func Encode(b []byte) (encd []byte) {
@@ -33,8 +27,7 @@ func Encode(b []byte) (encd []byte) {
outlen += 10
}
encd = make([]byte, outlen, outlen+8) //冗余的8B用于可能的结尾的覆盖
vals := (*slice)(unsafe.Pointer(&encd)).Data
var n uintptr
var n int
i := 0
for ; i <= len(b)-7; i += 7 {
sum := 0x000000000000003f & ((uint64)(b[i]) >> 2)
@@ -46,7 +39,7 @@ func Encode(b []byte) (encd []byte) {
sum |= ((uint64)(b[i+5]) << 48) & 0x003f000000000000
sum |= ((uint64)(b[i+6]) << 56) & 0xff00000000000000
sum += 0x004e004e004e004e
*(*uint64)(unsafe.Pointer(uintptr(vals) + n)) = sum
binary.LittleEndian.PutUint64(encd[n:], sum)
n += 8
}
if offset > 0 {
@@ -73,7 +66,9 @@ func Encode(b []byte) (encd []byte) {
}
}
sum += 0x004e004e004e004e
*(*uint64)(unsafe.Pointer(uintptr(vals) + n)) = sum
var tmp [8]byte
binary.LittleEndian.PutUint64(tmp[:], sum)
copy(encd[n:], tmp[:])
encd[outlen-2] = '='
encd[outlen-1] = byte(offset)
}
@@ -100,11 +95,10 @@ func Decode(b []byte) (decd []byte) {
}
outlen = outlen/8*7 + offset
decd = make([]byte, outlen)
vals := (*slice)(unsafe.Pointer(&b)).Data
var n uintptr
i := 0
for ; i <= len(decd)-7; n += 8 {
sum := *(*uint64)(unsafe.Pointer(uintptr(vals) + n)) - 0x004e004e004e004e
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))
@@ -121,7 +115,8 @@ func Decode(b []byte) (decd []byte) {
i++
}
if offset > 0 {
sum := *(*uint64)(unsafe.Pointer(uintptr(vals) + n)) - 0x000000000000004e
b = append(b, make([]byte, offset)...)
sum := binary.LittleEndian.Uint64(b[n:]) - 0x000000000000004e
decd[i] = byte(((sum & 0x000000000000003f) << 2) | ((sum & 0x000000000000c000) >> 14))
i++
if offset > 1 {
@@ -143,7 +138,6 @@ func Decode(b []byte) (decd []byte) {
decd[i] = byte(((sum & 0x0000030000000000) >> 34) | ((sum & 0x003f000000000000) >> 48))
i++
}
}
}
}