forked from mirror/go-json
131 lines
3.0 KiB
Go
131 lines
3.0 KiB
Go
package json
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import (
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"unsafe"
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)
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type boolDecoder struct{}
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func newBoolDecoder() *boolDecoder {
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return &boolDecoder{}
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}
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func trueBytes(s *stream) error {
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if s.cursor+3 >= s.length {
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if !s.read() {
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return errInvalidCharacter(s.char(), "bool(true)", s.totalOffset())
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}
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}
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s.cursor++
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if s.char() != 'r' {
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return errInvalidCharacter(s.char(), "bool(true)", s.totalOffset())
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}
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s.cursor++
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if s.char() != 'u' {
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return errInvalidCharacter(s.char(), "bool(true)", s.totalOffset())
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}
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s.cursor++
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if s.char() != 'e' {
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return errInvalidCharacter(s.char(), "bool(true)", s.totalOffset())
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}
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s.cursor++
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return nil
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}
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func falseBytes(s *stream) error {
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if s.cursor+4 >= s.length {
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if !s.read() {
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return errInvalidCharacter(s.char(), "bool(false)", s.totalOffset())
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}
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}
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s.cursor++
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if s.char() != 'a' {
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return errInvalidCharacter(s.char(), "bool(false)", s.totalOffset())
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}
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s.cursor++
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if s.char() != 'l' {
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return errInvalidCharacter(s.char(), "bool(false)", s.totalOffset())
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}
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s.cursor++
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if s.char() != 's' {
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return errInvalidCharacter(s.char(), "bool(false)", s.totalOffset())
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}
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s.cursor++
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if s.char() != 'e' {
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return errInvalidCharacter(s.char(), "bool(false)", s.totalOffset())
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}
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s.cursor++
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return nil
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}
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func (d *boolDecoder) decodeStream(s *stream, p uintptr) error {
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s.skipWhiteSpace()
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for {
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switch s.char() {
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case 't':
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if err := trueBytes(s); err != nil {
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return err
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}
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**(**bool)(unsafe.Pointer(&p)) = true
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return nil
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case 'f':
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if err := falseBytes(s); err != nil {
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return err
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}
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**(**bool)(unsafe.Pointer(&p)) = false
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return nil
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case nul:
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if s.read() {
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continue
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}
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goto ERROR
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}
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break
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}
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ERROR:
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return errUnexpectedEndOfJSON("bool", s.totalOffset())
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}
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func (d *boolDecoder) decode(buf []byte, cursor int64, p uintptr) (int64, error) {
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buflen := int64(len(buf))
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cursor = skipWhiteSpace(buf, cursor)
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switch buf[cursor] {
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case 't':
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if cursor+3 >= buflen {
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return 0, errUnexpectedEndOfJSON("bool(true)", cursor)
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}
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if buf[cursor+1] != 'r' {
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return 0, errInvalidCharacter(buf[cursor+1], "bool(true)", cursor)
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}
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if buf[cursor+2] != 'u' {
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return 0, errInvalidCharacter(buf[cursor+2], "bool(true)", cursor)
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}
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if buf[cursor+3] != 'e' {
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return 0, errInvalidCharacter(buf[cursor+3], "bool(true)", cursor)
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}
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cursor += 4
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**(**bool)(unsafe.Pointer(&p)) = true
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return cursor, nil
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case 'f':
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if cursor+4 >= buflen {
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return 0, errUnexpectedEndOfJSON("bool(false)", cursor)
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}
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if buf[cursor+1] != 'a' {
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return 0, errInvalidCharacter(buf[cursor+1], "bool(false)", cursor)
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}
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if buf[cursor+2] != 'l' {
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return 0, errInvalidCharacter(buf[cursor+2], "bool(false)", cursor)
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}
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if buf[cursor+3] != 's' {
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return 0, errInvalidCharacter(buf[cursor+3], "bool(false)", cursor)
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}
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if buf[cursor+4] != 'e' {
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return 0, errInvalidCharacter(buf[cursor+4], "bool(false)", cursor)
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}
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cursor += 5
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**(**bool)(unsafe.Pointer(&p)) = false
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return cursor, nil
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}
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return 0, errUnexpectedEndOfJSON("bool", cursor)
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}
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