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author | 2021-11-27 15:26:58 +0100 | |
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committer | 2021-11-27 15:26:58 +0100 | |
commit | 182b4eea73881c611a0f519576aa6ad2aa6799c2 (patch) | |
tree | 230fac469690fcee8797b13585e739be148d4789 /vendor/github.com/goccy/go-json/internal/decoder/stream.go | |
parent | Require confirmed email when checking oauth token (#332) (diff) | |
download | gotosocial-182b4eea73881c611a0f519576aa6ad2aa6799c2.tar.xz |
Update dependencies (#333)
Diffstat (limited to 'vendor/github.com/goccy/go-json/internal/decoder/stream.go')
-rw-r--r-- | vendor/github.com/goccy/go-json/internal/decoder/stream.go | 554 |
1 files changed, 0 insertions, 554 deletions
diff --git a/vendor/github.com/goccy/go-json/internal/decoder/stream.go b/vendor/github.com/goccy/go-json/internal/decoder/stream.go deleted file mode 100644 index c27468348..000000000 --- a/vendor/github.com/goccy/go-json/internal/decoder/stream.go +++ /dev/null @@ -1,554 +0,0 @@ -package decoder - -import ( - "bytes" - "encoding/json" - "io" - "strconv" - "unsafe" - - "github.com/goccy/go-json/internal/errors" -) - -const ( - initBufSize = 512 -) - -type Stream struct { - buf []byte - bufSize int64 - length int64 - r io.Reader - offset int64 - cursor int64 - filledBuffer bool - allRead bool - UseNumber bool - DisallowUnknownFields bool - Option *Option -} - -func NewStream(r io.Reader) *Stream { - return &Stream{ - r: r, - bufSize: initBufSize, - buf: make([]byte, initBufSize), - Option: &Option{}, - } -} - -func (s *Stream) TotalOffset() int64 { - return s.totalOffset() -} - -func (s *Stream) Buffered() io.Reader { - buflen := int64(len(s.buf)) - for i := s.cursor; i < buflen; i++ { - if s.buf[i] == nul { - return bytes.NewReader(s.buf[s.cursor:i]) - } - } - return bytes.NewReader(s.buf[s.cursor:]) -} - -func (s *Stream) PrepareForDecode() error { - for { - switch s.char() { - case ' ', '\t', '\r', '\n': - s.cursor++ - continue - case ',', ':': - s.cursor++ - return nil - case nul: - if s.read() { - continue - } - return io.EOF - } - break - } - return nil -} - -func (s *Stream) totalOffset() int64 { - return s.offset + s.cursor -} - -func (s *Stream) char() byte { - return s.buf[s.cursor] -} - -func (s *Stream) equalChar(c byte) bool { - cur := s.buf[s.cursor] - if cur == nul { - s.read() - cur = s.buf[s.cursor] - } - return cur == c -} - -func (s *Stream) stat() ([]byte, int64, unsafe.Pointer) { - return s.buf, s.cursor, (*sliceHeader)(unsafe.Pointer(&s.buf)).data -} - -func (s *Stream) bufptr() unsafe.Pointer { - return (*sliceHeader)(unsafe.Pointer(&s.buf)).data -} - -func (s *Stream) statForRetry() ([]byte, int64, unsafe.Pointer) { - s.cursor-- // for retry ( because caller progress cursor position in each loop ) - return s.buf, s.cursor, (*sliceHeader)(unsafe.Pointer(&s.buf)).data -} - -func (s *Stream) Reset() { - s.reset() - s.bufSize = initBufSize -} - -func (s *Stream) More() bool { - for { - switch s.char() { - case ' ', '\n', '\r', '\t': - s.cursor++ - continue - case '}', ']': - return false - case nul: - if s.read() { - continue - } - return false - } - break - } - return true -} - -func (s *Stream) Token() (interface{}, error) { - for { - c := s.char() - switch c { - case ' ', '\n', '\r', '\t': - s.cursor++ - case '{', '[', ']', '}': - s.cursor++ - return json.Delim(c), nil - case ',', ':': - s.cursor++ - case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': - bytes := floatBytes(s) - s := *(*string)(unsafe.Pointer(&bytes)) - f64, err := strconv.ParseFloat(s, 64) - if err != nil { - return nil, err - } - return f64, nil - case '"': - bytes, err := stringBytes(s) - if err != nil { - return nil, err - } - return string(bytes), nil - case 't': - if err := trueBytes(s); err != nil { - return nil, err - } - return true, nil - case 'f': - if err := falseBytes(s); err != nil { - return nil, err - } - return false, nil - case 'n': - if err := nullBytes(s); err != nil { - return nil, err - } - return nil, nil - case nul: - if s.read() { - continue - } - goto END - default: - return nil, errors.ErrInvalidCharacter(s.char(), "token", s.totalOffset()) - } - } -END: - return nil, io.EOF -} - -func (s *Stream) reset() { - s.offset += s.cursor - s.buf = s.buf[s.cursor:] - s.length -= s.cursor - s.cursor = 0 -} - -func (s *Stream) readBuf() []byte { - if s.filledBuffer { - s.bufSize *= 2 - remainBuf := s.buf - s.buf = make([]byte, s.bufSize) - copy(s.buf, remainBuf) - } - remainLen := s.length - s.cursor - remainNotNulCharNum := int64(0) - for i := int64(0); i < remainLen; i++ { - if s.buf[s.cursor+i] == nul { - break - } - remainNotNulCharNum++ - } - s.length = s.cursor + remainNotNulCharNum - return s.buf[s.cursor+remainNotNulCharNum:] -} - -func (s *Stream) read() bool { - if s.allRead { - return false - } - buf := s.readBuf() - last := len(buf) - 1 - buf[last] = nul - n, err := s.r.Read(buf[:last]) - s.length += int64(n) - if n == last { - s.filledBuffer = true - } else { - s.filledBuffer = false - } - if err == io.EOF { - s.allRead = true - } else if err != nil { - return false - } - return true -} - -func (s *Stream) skipWhiteSpace() byte { - p := s.bufptr() -LOOP: - c := char(p, s.cursor) - switch c { - case ' ', '\n', '\t', '\r': - s.cursor++ - goto LOOP - case nul: - if s.read() { - p = s.bufptr() - goto LOOP - } - } - return c -} - -func (s *Stream) skipObject(depth int64) error { - braceCount := 1 - _, cursor, p := s.stat() - for { - switch char(p, cursor) { - case '{': - braceCount++ - depth++ - if depth > maxDecodeNestingDepth { - return errors.ErrExceededMaxDepth(s.char(), s.cursor) - } - case '}': - braceCount-- - depth-- - if braceCount == 0 { - s.cursor = cursor + 1 - return nil - } - case '[': - depth++ - if depth > maxDecodeNestingDepth { - return errors.ErrExceededMaxDepth(s.char(), s.cursor) - } - case ']': - depth-- - case '"': - for { - cursor++ - switch char(p, cursor) { - case '\\': - cursor++ - if char(p, cursor) == nul { - s.cursor = cursor - if s.read() { - _, cursor, p = s.statForRetry() - continue - } - return errors.ErrUnexpectedEndOfJSON("string of object", cursor) - } - case '"': - goto SWITCH_OUT - case nul: - s.cursor = cursor - if s.read() { - _, cursor, p = s.statForRetry() - continue - } - return errors.ErrUnexpectedEndOfJSON("string of object", cursor) - } - } - case nul: - s.cursor = cursor - if s.read() { - _, cursor, p = s.stat() - continue - } - return errors.ErrUnexpectedEndOfJSON("object of object", cursor) - } - SWITCH_OUT: - cursor++ - } -} - -func (s *Stream) skipArray(depth int64) error { - bracketCount := 1 - _, cursor, p := s.stat() - for { - switch char(p, cursor) { - case '[': - bracketCount++ - depth++ - if depth > maxDecodeNestingDepth { - return errors.ErrExceededMaxDepth(s.char(), s.cursor) - } - case ']': - bracketCount-- - depth-- - if bracketCount == 0 { - s.cursor = cursor + 1 - return nil - } - case '{': - depth++ - if depth > maxDecodeNestingDepth { - return errors.ErrExceededMaxDepth(s.char(), s.cursor) - } - case '}': - depth-- - case '"': - for { - cursor++ - switch char(p, cursor) { - case '\\': - cursor++ - if char(p, cursor) == nul { - s.cursor = cursor - if s.read() { - _, cursor, p = s.statForRetry() - continue - } - return errors.ErrUnexpectedEndOfJSON("string of object", cursor) - } - case '"': - goto SWITCH_OUT - case nul: - s.cursor = cursor - if s.read() { - _, cursor, p = s.statForRetry() - continue - } - return errors.ErrUnexpectedEndOfJSON("string of object", cursor) - } - } - case nul: - s.cursor = cursor - if s.read() { - _, cursor, p = s.stat() - continue - } - return errors.ErrUnexpectedEndOfJSON("array of object", cursor) - } - SWITCH_OUT: - cursor++ - } -} - -func (s *Stream) skipValue(depth int64) error { - _, cursor, p := s.stat() - for { - switch char(p, cursor) { - case ' ', '\n', '\t', '\r': - cursor++ - continue - case nul: - s.cursor = cursor - if s.read() { - _, cursor, p = s.stat() - continue - } - return errors.ErrUnexpectedEndOfJSON("value of object", s.totalOffset()) - case '{': - s.cursor = cursor + 1 - return s.skipObject(depth + 1) - case '[': - s.cursor = cursor + 1 - return s.skipArray(depth + 1) - case '"': - for { - cursor++ - switch char(p, cursor) { - case '\\': - cursor++ - if char(p, cursor) == nul { - s.cursor = cursor - if s.read() { - _, cursor, p = s.statForRetry() - continue - } - return errors.ErrUnexpectedEndOfJSON("value of string", s.totalOffset()) - } - case '"': - s.cursor = cursor + 1 - return nil - case nul: - s.cursor = cursor - if s.read() { - _, cursor, p = s.statForRetry() - continue - } - return errors.ErrUnexpectedEndOfJSON("value of string", s.totalOffset()) - } - } - case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': - for { - cursor++ - c := char(p, cursor) - if floatTable[c] { - continue - } else if c == nul { - if s.read() { - s.cursor-- // for retry current character - _, cursor, p = s.stat() - continue - } - } - s.cursor = cursor - return nil - } - case 't': - s.cursor = cursor - if err := trueBytes(s); err != nil { - return err - } - return nil - case 'f': - s.cursor = cursor - if err := falseBytes(s); err != nil { - return err - } - return nil - case 'n': - s.cursor = cursor - if err := nullBytes(s); err != nil { - return err - } - return nil - } - cursor++ - } -} - -func nullBytes(s *Stream) error { - // current cursor's character is 'n' - s.cursor++ - if s.char() != 'u' { - if err := retryReadNull(s); err != nil { - return err - } - } - s.cursor++ - if s.char() != 'l' { - if err := retryReadNull(s); err != nil { - return err - } - } - s.cursor++ - if s.char() != 'l' { - if err := retryReadNull(s); err != nil { - return err - } - } - s.cursor++ - return nil -} - -func retryReadNull(s *Stream) error { - if s.char() == nul && s.read() { - return nil - } - return errors.ErrInvalidCharacter(s.char(), "null", s.totalOffset()) -} - -func trueBytes(s *Stream) error { - // current cursor's character is 't' - s.cursor++ - if s.char() != 'r' { - if err := retryReadTrue(s); err != nil { - return err - } - } - s.cursor++ - if s.char() != 'u' { - if err := retryReadTrue(s); err != nil { - return err - } - } - s.cursor++ - if s.char() != 'e' { - if err := retryReadTrue(s); err != nil { - return err - } - } - s.cursor++ - return nil -} - -func retryReadTrue(s *Stream) error { - if s.char() == nul && s.read() { - return nil - } - return errors.ErrInvalidCharacter(s.char(), "bool(true)", s.totalOffset()) -} - -func falseBytes(s *Stream) error { - // current cursor's character is 'f' - s.cursor++ - if s.char() != 'a' { - if err := retryReadFalse(s); err != nil { - return err - } - } - s.cursor++ - if s.char() != 'l' { - if err := retryReadFalse(s); err != nil { - return err - } - } - s.cursor++ - if s.char() != 's' { - if err := retryReadFalse(s); err != nil { - return err - } - } - s.cursor++ - if s.char() != 'e' { - if err := retryReadFalse(s); err != nil { - return err - } - } - s.cursor++ - return nil -} - -func retryReadFalse(s *Stream) error { - if s.char() == nul && s.read() { - return nil - } - return errors.ErrInvalidCharacter(s.char(), "bool(false)", s.totalOffset()) -} |