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//go:build (amd64 && go1.16 && !go1.24) || (arm64 && go1.20 && !go1.24)
// +build amd64,go1.16,!go1.24 arm64,go1.20,!go1.24
/**
* Copyright 2024 ByteDance Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package alg
import (
"runtime"
"unsafe"
"github.com/bytedance/sonic/internal/native"
"github.com/bytedance/sonic/internal/native/types"
"github.com/bytedance/sonic/internal/rt"
)
// Valid validates json and returns first non-blank character position,
// if it is only one valid json value.
// Otherwise returns invalid character position using start.
//
// Note: it does not check for the invalid UTF-8 characters.
func Valid(data []byte) (ok bool, start int) {
n := len(data)
if n == 0 {
return false, -1
}
s := rt.Mem2Str(data)
p := 0
m := types.NewStateMachine()
ret := native.ValidateOne(&s, &p, m, 0)
types.FreeStateMachine(m)
if ret < 0 {
return false, p-1
}
/* check for trailing spaces */
for ;p < n; p++ {
if (types.SPACE_MASK & (1 << data[p])) == 0 {
return false, p
}
}
return true, ret
}
var typeByte = rt.UnpackEface(byte(0)).Type
//go:nocheckptr
func Quote(buf []byte, val string, double bool) []byte {
if len(val) == 0 {
if double {
return append(buf, `"\"\""`...)
}
return append(buf, `""`...)
}
if double {
buf = append(buf, `"\"`...)
} else {
buf = append(buf, `"`...)
}
sp := rt.IndexChar(val, 0)
nb := len(val)
b := (*rt.GoSlice)(unsafe.Pointer(&buf))
// input buffer
for nb > 0 {
// output buffer
dp := unsafe.Pointer(uintptr(b.Ptr) + uintptr(b.Len))
dn := b.Cap - b.Len
// call native.Quote, dn is byte count it outputs
opts := uint64(0)
if double {
opts = types.F_DOUBLE_UNQUOTE
}
ret := native.Quote(sp, nb, dp, &dn, opts)
// update *buf length
b.Len += dn
// no need more output
if ret >= 0 {
break
}
// double buf size
*b = rt.GrowSlice(typeByte, *b, b.Cap*2)
// ret is the complement of consumed input
ret = ^ret
// update input buffer
nb -= ret
sp = unsafe.Pointer(uintptr(sp) + uintptr(ret))
}
runtime.KeepAlive(buf)
runtime.KeepAlive(sp)
if double {
buf = append(buf, `\""`...)
} else {
buf = append(buf, `"`...)
}
return buf
}
func HtmlEscape(dst []byte, src []byte) []byte {
var sidx int
dst = append(dst, src[:0]...) // avoid check nil dst
sbuf := (*rt.GoSlice)(unsafe.Pointer(&src))
dbuf := (*rt.GoSlice)(unsafe.Pointer(&dst))
/* grow dst if it is shorter */
if cap(dst)-len(dst) < len(src)+types.BufPaddingSize {
cap := len(src)*3/2 + types.BufPaddingSize
*dbuf = rt.GrowSlice(typeByte, *dbuf, cap)
}
for sidx < sbuf.Len {
sp := rt.Add(sbuf.Ptr, uintptr(sidx))
dp := rt.Add(dbuf.Ptr, uintptr(dbuf.Len))
sn := sbuf.Len - sidx
dn := dbuf.Cap - dbuf.Len
nb := native.HTMLEscape(sp, sn, dp, &dn)
/* check for errors */
if dbuf.Len += dn; nb >= 0 {
break
}
/* not enough space, grow the slice and try again */
sidx += ^nb
*dbuf = rt.GrowSlice(typeByte, *dbuf, dbuf.Cap*2)
}
return dst
}
func F64toa(buf []byte, v float64) ([]byte) {
if v == 0 {
return append(buf, '0')
}
buf = rt.GuardSlice2(buf, 64)
ret := native.F64toa((*byte)(rt.IndexByte(buf, len(buf))), v)
if ret > 0 {
return buf[:len(buf)+ret]
} else {
return buf
}
}
func F32toa(buf []byte, v float32) ([]byte) {
if v == 0 {
return append(buf, '0')
}
buf = rt.GuardSlice2(buf, 64)
ret := native.F32toa((*byte)(rt.IndexByte(buf, len(buf))), v)
if ret > 0 {
return buf[:len(buf)+ret]
} else {
return buf
}
}
func I64toa(buf []byte, v int64) ([]byte) {
buf = rt.GuardSlice2(buf, 32)
ret := native.I64toa((*byte)(rt.IndexByte(buf, len(buf))), v)
if ret > 0 {
return buf[:len(buf)+ret]
} else {
return buf
}
}
func U64toa(buf []byte, v uint64) ([]byte) {
buf = rt.GuardSlice2(buf, 32)
ret := native.U64toa((*byte)(rt.IndexByte(buf, len(buf))), v)
if ret > 0 {
return buf[:len(buf)+ret]
} else {
return buf
}
}
|
