mirror of https://github.com/goccy/go-json.git
102 lines
2.0 KiB
Go
102 lines
2.0 KiB
Go
package json
|
|
|
|
import (
|
|
"errors"
|
|
"unsafe"
|
|
)
|
|
|
|
type structFieldSet struct {
|
|
dec decoder
|
|
offset uintptr
|
|
}
|
|
|
|
type structDecoder struct {
|
|
fieldMap map[string]*structFieldSet
|
|
keyDecoder *stringDecoder
|
|
}
|
|
|
|
func newStructDecoder(fieldMap map[string]*structFieldSet) *structDecoder {
|
|
return &structDecoder{
|
|
fieldMap: fieldMap,
|
|
keyDecoder: newStringDecoder(),
|
|
}
|
|
}
|
|
|
|
func (d *structDecoder) skipValue(ctx *context) error {
|
|
ctx.skipWhiteSpace()
|
|
braceCount := 0
|
|
bracketCount := 0
|
|
cursor := ctx.cursor
|
|
buf := ctx.buf
|
|
buflen := ctx.buflen
|
|
for ; cursor < buflen; cursor++ {
|
|
switch buf[cursor] {
|
|
case '{':
|
|
braceCount++
|
|
case '[':
|
|
bracketCount++
|
|
case '}':
|
|
braceCount--
|
|
if braceCount == -1 && bracketCount == 0 {
|
|
return nil
|
|
}
|
|
case ']':
|
|
bracketCount--
|
|
case ',':
|
|
if bracketCount == 0 && braceCount == 0 {
|
|
return nil
|
|
}
|
|
}
|
|
}
|
|
return errors.New("unexpected error value")
|
|
}
|
|
|
|
func (d *structDecoder) decode(ctx *context, p uintptr) error {
|
|
ctx.skipWhiteSpace()
|
|
buf := ctx.buf
|
|
buflen := ctx.buflen
|
|
cursor := ctx.cursor
|
|
if buflen < 2 {
|
|
return errors.New("unexpected error {}")
|
|
}
|
|
if buf[cursor] != '{' {
|
|
return errors.New("unexpected error {")
|
|
}
|
|
cursor++
|
|
for ; cursor < buflen; cursor++ {
|
|
ctx.cursor = cursor
|
|
key, err := d.keyDecoder.decodeByte(ctx)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
cursor = ctx.skipWhiteSpace()
|
|
if buf[cursor] != ':' {
|
|
return errors.New("unexpected error invalid delimiter for object")
|
|
}
|
|
cursor++
|
|
if cursor >= buflen {
|
|
return errors.New("unexpected error missing value")
|
|
}
|
|
ctx.cursor = cursor
|
|
k := *(*string)(unsafe.Pointer(&key))
|
|
field, exists := d.fieldMap[k]
|
|
if exists {
|
|
if err := field.dec.decode(ctx, p+field.offset); err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
if err := d.skipValue(ctx); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
cursor = ctx.skipWhiteSpace()
|
|
if buf[cursor] == '}' {
|
|
return nil
|
|
}
|
|
if buf[cursor] != ',' {
|
|
return errors.New("unexpected error ,")
|
|
}
|
|
}
|
|
return nil
|
|
}
|