forked from mirrors/gotosocial
114 lines
2.9 KiB
Go
114 lines
2.9 KiB
Go
package decoder
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import (
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"encoding/base64"
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"unsafe"
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"github.com/goccy/go-json/internal/errors"
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"github.com/goccy/go-json/internal/runtime"
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)
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type bytesDecoder struct {
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typ *runtime.Type
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sliceDecoder Decoder
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stringDecoder *stringDecoder
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structName string
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fieldName string
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}
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func byteUnmarshalerSliceDecoder(typ *runtime.Type, structName string, fieldName string) Decoder {
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var unmarshalDecoder Decoder
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switch {
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case runtime.PtrTo(typ).Implements(unmarshalJSONType):
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unmarshalDecoder = newUnmarshalJSONDecoder(runtime.PtrTo(typ), structName, fieldName)
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case runtime.PtrTo(typ).Implements(unmarshalTextType):
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unmarshalDecoder = newUnmarshalTextDecoder(runtime.PtrTo(typ), structName, fieldName)
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}
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if unmarshalDecoder == nil {
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return nil
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}
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return newSliceDecoder(unmarshalDecoder, typ, 1, structName, fieldName)
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}
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func newBytesDecoder(typ *runtime.Type, structName string, fieldName string) *bytesDecoder {
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return &bytesDecoder{
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typ: typ,
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sliceDecoder: byteUnmarshalerSliceDecoder(typ, structName, fieldName),
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stringDecoder: newStringDecoder(structName, fieldName),
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structName: structName,
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fieldName: fieldName,
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}
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}
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func (d *bytesDecoder) DecodeStream(s *Stream, depth int64, p unsafe.Pointer) error {
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bytes, err := d.decodeStreamBinary(s, depth, p)
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if err != nil {
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return err
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}
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if bytes == nil {
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s.reset()
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return nil
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}
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decodedLen := base64.StdEncoding.DecodedLen(len(bytes))
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buf := make([]byte, decodedLen)
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n, err := base64.StdEncoding.Decode(buf, bytes)
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if err != nil {
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return err
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}
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*(*[]byte)(p) = buf[:n]
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s.reset()
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return nil
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}
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func (d *bytesDecoder) Decode(ctx *RuntimeContext, cursor, depth int64, p unsafe.Pointer) (int64, error) {
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bytes, c, err := d.decodeBinary(ctx, cursor, depth, p)
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if err != nil {
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return 0, err
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}
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if bytes == nil {
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return c, nil
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}
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cursor = c
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decodedLen := base64.StdEncoding.DecodedLen(len(bytes))
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b := make([]byte, decodedLen)
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n, err := base64.StdEncoding.Decode(b, bytes)
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if err != nil {
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return 0, err
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}
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*(*[]byte)(p) = b[:n]
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return cursor, nil
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}
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func (d *bytesDecoder) decodeStreamBinary(s *Stream, depth int64, p unsafe.Pointer) ([]byte, error) {
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c := s.skipWhiteSpace()
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if c == '[' {
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if d.sliceDecoder == nil {
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return nil, &errors.UnmarshalTypeError{
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Type: runtime.RType2Type(d.typ),
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Offset: s.totalOffset(),
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}
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}
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err := d.sliceDecoder.DecodeStream(s, depth, p)
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return nil, err
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}
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return d.stringDecoder.decodeStreamByte(s)
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}
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func (d *bytesDecoder) decodeBinary(ctx *RuntimeContext, cursor, depth int64, p unsafe.Pointer) ([]byte, int64, error) {
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buf := ctx.Buf
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cursor = skipWhiteSpace(buf, cursor)
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if buf[cursor] == '[' {
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if d.sliceDecoder == nil {
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return nil, 0, &errors.UnmarshalTypeError{
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Type: runtime.RType2Type(d.typ),
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Offset: cursor,
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}
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}
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c, err := d.sliceDecoder.Decode(ctx, cursor, depth, p)
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if err != nil {
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return nil, 0, err
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}
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return nil, c, nil
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}
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return d.stringDecoder.decodeByte(buf, cursor)
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}
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