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