forked from mirror/go-json
66 lines
1.4 KiB
Go
66 lines
1.4 KiB
Go
package json
|
|
|
|
import (
|
|
"errors"
|
|
"unsafe"
|
|
)
|
|
|
|
type stringDecoder struct {
|
|
}
|
|
|
|
func newStringDecoder() *stringDecoder {
|
|
return &stringDecoder{}
|
|
}
|
|
|
|
func (d *stringDecoder) decode(ctx *context, p uintptr) error {
|
|
bytes, err := d.decodeByte(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
*(*string)(unsafe.Pointer(p)) = *(*string)(unsafe.Pointer(&bytes))
|
|
return nil
|
|
}
|
|
|
|
func (d *stringDecoder) decodeByte(ctx *context) ([]byte, error) {
|
|
buf := ctx.buf
|
|
buflen := ctx.buflen
|
|
cursor := ctx.cursor
|
|
for ; cursor < buflen; cursor++ {
|
|
switch buf[cursor] {
|
|
case ' ', '\n', '\t', '\r':
|
|
continue
|
|
case '"':
|
|
cursor++
|
|
start := cursor
|
|
for ; cursor < buflen; cursor++ {
|
|
switch buf[cursor] {
|
|
case '\\':
|
|
cursor++
|
|
case '"':
|
|
literal := buf[start:cursor]
|
|
cursor++
|
|
ctx.cursor = cursor
|
|
return literal, nil
|
|
}
|
|
}
|
|
return nil, errors.New("unexpected error string")
|
|
case 'n':
|
|
if cursor+3 >= ctx.buflen {
|
|
return nil, errors.New("unexpected error. invalid bool character")
|
|
}
|
|
if buf[cursor+1] != 'u' {
|
|
return nil, errors.New("unexpected error. invalid bool character")
|
|
}
|
|
if buf[cursor+2] != 'l' {
|
|
return nil, errors.New("unexpected error. invalid bool character")
|
|
}
|
|
if buf[cursor+3] != 'l' {
|
|
return nil, errors.New("unexpected error. invalid bool character")
|
|
}
|
|
ctx.cursor += 5
|
|
return []byte{}, nil
|
|
}
|
|
}
|
|
return nil, errors.New("unexpected error key delimiter")
|
|
}
|