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primitives.go
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/
primitives.go
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/*
* Copyright 2021 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 encoder
import (
`encoding`
`encoding/json`
`unsafe`
`github.com/bytedance/sonic/internal/jit`
`github.com/bytedance/sonic/internal/native`
`github.com/bytedance/sonic/internal/rt`
)
/** Encoder Primitives **/
func encodeNil(rb *[]byte) error {
*rb = append(*rb, 'n', 'u', 'l', 'l')
return nil
}
func encodeString(buf *[]byte, val string) error {
var sidx int
var pbuf *rt.GoSlice
var pstr *rt.GoString
/* opening quote */
*buf = append(*buf, '"')
pbuf = (*rt.GoSlice)(unsafe.Pointer(buf))
pstr = (*rt.GoString)(unsafe.Pointer(&val))
/* encode with native library */
for sidx < pstr.Len {
sn := pstr.Len - sidx
dn := pbuf.Cap - pbuf.Len
sp := padd(pstr.Ptr, sidx)
dp := padd(pbuf.Ptr, pbuf.Len)
nb := native.Quote(sp, sn, dp, &dn, 0)
/* check for errors */
if pbuf.Len += dn; nb >= 0 {
break
}
/* not enough space, grow the slice and try again */
sidx += ^nb
*pbuf = growslice(rt.UnpackType(byteType), *pbuf, pbuf.Cap * 2)
}
/* closing quote */
*buf = append(*buf, '"')
return nil
}
func encodeTypedPointer(buf *[]byte, vt *rt.GoType, vp *unsafe.Pointer, sb *_Stack, fv uint64) error {
if vt == nil {
return encodeNil(buf)
} else if fn, err := findOrCompile(vt, (fv&(1<<bitPointerValue)) != 0); err != nil {
return err
} else if vt.Indirect() {
rt.MoreStack(_FP_size + native.MaxFrameSize)
rt.StopProf()
err := fn(buf, *vp, sb, fv)
rt.StartProf()
return err
} else {
rt.MoreStack(_FP_size + native.MaxFrameSize)
rt.StopProf()
err := fn(buf, unsafe.Pointer(vp), sb, fv)
rt.StartProf()
return err
}
}
func encodeJsonMarshaler(buf *[]byte, val json.Marshaler, opt Options) error {
if ret, err := val.MarshalJSON(); err != nil {
return err
} else {
if opt & CompactMarshaler != 0 {
return compact(buf, ret)
}
if opt & NoValidateJSONMarshaler == 0 {
if ok, s := Valid(ret); !ok {
return error_marshaler(ret, s)
}
}
*buf = append(*buf, ret...)
return nil
}
}
func encodeTextMarshaler(buf *[]byte, val encoding.TextMarshaler, opt Options) error {
if ret, err := val.MarshalText(); err != nil {
return err
} else {
if opt & NoQuoteTextMarshaler != 0 {
*buf = append(*buf, ret...)
return nil
}
return encodeString(buf, rt.Mem2Str(ret) )
}
}
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) + native.BufPaddingSize {
cap := len(src) * 3 / 2 + native.BufPaddingSize
*dbuf = growslice(typeByte, *dbuf, cap)
}
for sidx < sbuf.Len {
sp := padd(sbuf.Ptr, sidx)
dp := padd(dbuf.Ptr, 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 = growslice(typeByte, *dbuf, dbuf.Cap * 2)
}
return dst
}
var (
argPtrs = []bool { true, true, true, false }
localPtrs = []bool{}
)
var (
_F_assertI2I = jit.Func(assertI2I)
)
func asText(v unsafe.Pointer) (string, error) {
text := assertI2I(_T_encoding_TextMarshaler, *(*rt.GoIface)(v))
r, e := (*(*encoding.TextMarshaler)(unsafe.Pointer(&text))).MarshalText()
return rt.Mem2Str(r), e
}
func asJson(v unsafe.Pointer) (string, error) {
text := assertI2I(_T_json_Marshaler, *(*rt.GoIface)(v))
r, e := (*(*json.Marshaler)(unsafe.Pointer(&text))).MarshalJSON()
return rt.Mem2Str(r), e
}