diff options
Diffstat (limited to 'src/dma/vendor/github.com/go-redis/redis/internal/proto')
3 files changed, 595 insertions, 0 deletions
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/proto/reader.go b/src/dma/vendor/github.com/go-redis/redis/internal/proto/reader.go new file mode 100644 index 00000000..8c28c7b7 --- /dev/null +++ b/src/dma/vendor/github.com/go-redis/redis/internal/proto/reader.go @@ -0,0 +1,316 @@ +package proto + +import ( + "bufio" + "fmt" + "io" + "strconv" + + "github.com/go-redis/redis/internal/util" +) + +const bytesAllocLimit = 1024 * 1024 // 1mb + +const ( + ErrorReply = '-' + StatusReply = '+' + IntReply = ':' + StringReply = '$' + ArrayReply = '*' +) + +//------------------------------------------------------------------------------ + +const Nil = RedisError("redis: nil") + +type RedisError string + +func (e RedisError) Error() string { return string(e) } + +//------------------------------------------------------------------------------ + +type MultiBulkParse func(*Reader, int64) (interface{}, error) + +type Reader struct { + src *bufio.Reader + buf []byte +} + +func NewReader(rd io.Reader) *Reader { + return &Reader{ + src: bufio.NewReader(rd), + buf: make([]byte, 4096), + } +} + +func (r *Reader) Reset(rd io.Reader) { + r.src.Reset(rd) +} + +func (r *Reader) PeekBuffered() []byte { + if n := r.src.Buffered(); n != 0 { + b, _ := r.src.Peek(n) + return b + } + return nil +} + +func (r *Reader) ReadN(n int) ([]byte, error) { + b, err := readN(r.src, r.buf, n) + if err != nil { + return nil, err + } + r.buf = b + return b, nil +} + +func (r *Reader) ReadLine() ([]byte, error) { + line, isPrefix, err := r.src.ReadLine() + if err != nil { + return nil, err + } + if isPrefix { + return nil, bufio.ErrBufferFull + } + if len(line) == 0 { + return nil, fmt.Errorf("redis: reply is empty") + } + if isNilReply(line) { + return nil, Nil + } + return line, nil +} + +func (r *Reader) ReadReply(m MultiBulkParse) (interface{}, error) { + line, err := r.ReadLine() + if err != nil { + return nil, err + } + + switch line[0] { + case ErrorReply: + return nil, ParseErrorReply(line) + case StatusReply: + return parseTmpStatusReply(line), nil + case IntReply: + return util.ParseInt(line[1:], 10, 64) + case StringReply: + return r.readTmpBytesReply(line) + case ArrayReply: + n, err := parseArrayLen(line) + if err != nil { + return nil, err + } + return m(r, n) + } + return nil, fmt.Errorf("redis: can't parse %.100q", line) +} + +func (r *Reader) ReadIntReply() (int64, error) { + line, err := r.ReadLine() + if err != nil { + return 0, err + } + switch line[0] { + case ErrorReply: + return 0, ParseErrorReply(line) + case IntReply: + return util.ParseInt(line[1:], 10, 64) + default: + return 0, fmt.Errorf("redis: can't parse int reply: %.100q", line) + } +} + +func (r *Reader) ReadTmpBytesReply() ([]byte, error) { + line, err := r.ReadLine() + if err != nil { + return nil, err + } + switch line[0] { + case ErrorReply: + return nil, ParseErrorReply(line) + case StringReply: + return r.readTmpBytesReply(line) + case StatusReply: + return parseTmpStatusReply(line), nil + default: + return nil, fmt.Errorf("redis: can't parse string reply: %.100q", line) + } +} + +func (r *Reader) ReadBytesReply() ([]byte, error) { + b, err := r.ReadTmpBytesReply() + if err != nil { + return nil, err + } + cp := make([]byte, len(b)) + copy(cp, b) + return cp, nil +} + +func (r *Reader) ReadStringReply() (string, error) { + b, err := r.ReadTmpBytesReply() + if err != nil { + return "", err + } + return string(b), nil +} + +func (r *Reader) ReadFloatReply() (float64, error) { + b, err := r.ReadTmpBytesReply() + if err != nil { + return 0, err + } + return util.ParseFloat(b, 64) +} + +func (r *Reader) ReadArrayReply(m MultiBulkParse) (interface{}, error) { + line, err := r.ReadLine() + if err != nil { + return nil, err + } + switch line[0] { + case ErrorReply: + return nil, ParseErrorReply(line) + case ArrayReply: + n, err := parseArrayLen(line) + if err != nil { + return nil, err + } + return m(r, n) + default: + return nil, fmt.Errorf("redis: can't parse array reply: %.100q", line) + } +} + +func (r *Reader) ReadArrayLen() (int64, error) { + line, err := r.ReadLine() + if err != nil { + return 0, err + } + switch line[0] { + case ErrorReply: + return 0, ParseErrorReply(line) + case ArrayReply: + return parseArrayLen(line) + default: + return 0, fmt.Errorf("redis: can't parse array reply: %.100q", line) + } +} + +func (r *Reader) ReadScanReply() ([]string, uint64, error) { + n, err := r.ReadArrayLen() + if err != nil { + return nil, 0, err + } + if n != 2 { + return nil, 0, fmt.Errorf("redis: got %d elements in scan reply, expected 2", n) + } + + cursor, err := r.ReadUint() + if err != nil { + return nil, 0, err + } + + n, err = r.ReadArrayLen() + if err != nil { + return nil, 0, err + } + + keys := make([]string, n) + for i := int64(0); i < n; i++ { + key, err := r.ReadStringReply() + if err != nil { + return nil, 0, err + } + keys[i] = key + } + + return keys, cursor, err +} + +func (r *Reader) readTmpBytesReply(line []byte) ([]byte, error) { + if isNilReply(line) { + return nil, Nil + } + + replyLen, err := strconv.Atoi(string(line[1:])) + if err != nil { + return nil, err + } + + b, err := r.ReadN(replyLen + 2) + if err != nil { + return nil, err + } + return b[:replyLen], nil +} + +func (r *Reader) ReadInt() (int64, error) { + b, err := r.ReadTmpBytesReply() + if err != nil { + return 0, err + } + return util.ParseInt(b, 10, 64) +} + +func (r *Reader) ReadUint() (uint64, error) { + b, err := r.ReadTmpBytesReply() + if err != nil { + return 0, err + } + return util.ParseUint(b, 10, 64) +} + +// -------------------------------------------------------------------- + +func readN(r io.Reader, b []byte, n int) ([]byte, error) { + if n == 0 && b == nil { + return make([]byte, 0), nil + } + + if cap(b) >= n { + b = b[:n] + _, err := io.ReadFull(r, b) + return b, err + } + b = b[:cap(b)] + + pos := 0 + for pos < n { + diff := n - len(b) + if diff > bytesAllocLimit { + diff = bytesAllocLimit + } + b = append(b, make([]byte, diff)...) + + nn, err := io.ReadFull(r, b[pos:]) + if err != nil { + return nil, err + } + pos += nn + } + + return b, nil +} + +func isNilReply(b []byte) bool { + return len(b) == 3 && + (b[0] == StringReply || b[0] == ArrayReply) && + b[1] == '-' && b[2] == '1' +} + +func ParseErrorReply(line []byte) error { + return RedisError(string(line[1:])) +} + +func parseTmpStatusReply(line []byte) []byte { + return line[1:] +} + +func parseArrayLen(line []byte) (int64, error) { + if isNilReply(line) { + return 0, Nil + } + return util.ParseInt(line[1:], 10, 64) +} diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/proto/scan.go b/src/dma/vendor/github.com/go-redis/redis/internal/proto/scan.go new file mode 100644 index 00000000..3bdb33f9 --- /dev/null +++ b/src/dma/vendor/github.com/go-redis/redis/internal/proto/scan.go @@ -0,0 +1,166 @@ +package proto + +import ( + "encoding" + "fmt" + "reflect" + + "github.com/go-redis/redis/internal/util" +) + +func Scan(b []byte, v interface{}) error { + switch v := v.(type) { + case nil: + return fmt.Errorf("redis: Scan(nil)") + case *string: + *v = util.BytesToString(b) + return nil + case *[]byte: + *v = b + return nil + case *int: + var err error + *v, err = util.Atoi(b) + return err + case *int8: + n, err := util.ParseInt(b, 10, 8) + if err != nil { + return err + } + *v = int8(n) + return nil + case *int16: + n, err := util.ParseInt(b, 10, 16) + if err != nil { + return err + } + *v = int16(n) + return nil + case *int32: + n, err := util.ParseInt(b, 10, 32) + if err != nil { + return err + } + *v = int32(n) + return nil + case *int64: + n, err := util.ParseInt(b, 10, 64) + if err != nil { + return err + } + *v = n + return nil + case *uint: + n, err := util.ParseUint(b, 10, 64) + if err != nil { + return err + } + *v = uint(n) + return nil + case *uint8: + n, err := util.ParseUint(b, 10, 8) + if err != nil { + return err + } + *v = uint8(n) + return nil + case *uint16: + n, err := util.ParseUint(b, 10, 16) + if err != nil { + return err + } + *v = uint16(n) + return nil + case *uint32: + n, err := util.ParseUint(b, 10, 32) + if err != nil { + return err + } + *v = uint32(n) + return nil + case *uint64: + n, err := util.ParseUint(b, 10, 64) + if err != nil { + return err + } + *v = n + return nil + case *float32: + n, err := util.ParseFloat(b, 32) + if err != nil { + return err + } + *v = float32(n) + return err + case *float64: + var err error + *v, err = util.ParseFloat(b, 64) + return err + case *bool: + *v = len(b) == 1 && b[0] == '1' + return nil + case encoding.BinaryUnmarshaler: + return v.UnmarshalBinary(b) + default: + return fmt.Errorf( + "redis: can't unmarshal %T (consider implementing BinaryUnmarshaler)", v) + } +} + +func ScanSlice(data []string, slice interface{}) error { + v := reflect.ValueOf(slice) + if !v.IsValid() { + return fmt.Errorf("redis: ScanSlice(nil)") + } + if v.Kind() != reflect.Ptr { + return fmt.Errorf("redis: ScanSlice(non-pointer %T)", slice) + } + v = v.Elem() + if v.Kind() != reflect.Slice { + return fmt.Errorf("redis: ScanSlice(non-slice %T)", slice) + } + + next := makeSliceNextElemFunc(v) + for i, s := range data { + elem := next() + if err := Scan([]byte(s), elem.Addr().Interface()); err != nil { + err = fmt.Errorf("redis: ScanSlice index=%d value=%q failed: %s", i, s, err) + return err + } + } + + return nil +} + +func makeSliceNextElemFunc(v reflect.Value) func() reflect.Value { + elemType := v.Type().Elem() + + if elemType.Kind() == reflect.Ptr { + elemType = elemType.Elem() + return func() reflect.Value { + if v.Len() < v.Cap() { + v.Set(v.Slice(0, v.Len()+1)) + elem := v.Index(v.Len() - 1) + if elem.IsNil() { + elem.Set(reflect.New(elemType)) + } + return elem.Elem() + } + + elem := reflect.New(elemType) + v.Set(reflect.Append(v, elem)) + return elem.Elem() + } + } + + zero := reflect.Zero(elemType) + return func() reflect.Value { + if v.Len() < v.Cap() { + v.Set(v.Slice(0, v.Len()+1)) + return v.Index(v.Len() - 1) + } + + v.Set(reflect.Append(v, zero)) + return v.Index(v.Len() - 1) + } +} diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/proto/write_buffer.go b/src/dma/vendor/github.com/go-redis/redis/internal/proto/write_buffer.go new file mode 100644 index 00000000..664f4c33 --- /dev/null +++ b/src/dma/vendor/github.com/go-redis/redis/internal/proto/write_buffer.go @@ -0,0 +1,113 @@ +package proto + +import ( + "encoding" + "fmt" + "strconv" +) + +type WriteBuffer struct { + b []byte +} + +func NewWriteBuffer() *WriteBuffer { + return &WriteBuffer{ + b: make([]byte, 0, 4096), + } +} + +func (w *WriteBuffer) Len() int { return len(w.b) } +func (w *WriteBuffer) Bytes() []byte { return w.b } +func (w *WriteBuffer) Reset() { w.b = w.b[:0] } + +func (w *WriteBuffer) Append(args []interface{}) error { + w.b = append(w.b, ArrayReply) + w.b = strconv.AppendUint(w.b, uint64(len(args)), 10) + w.b = append(w.b, '\r', '\n') + + for _, arg := range args { + if err := w.append(arg); err != nil { + return err + } + } + return nil +} + +func (w *WriteBuffer) append(val interface{}) error { + switch v := val.(type) { + case nil: + w.AppendString("") + case string: + w.AppendString(v) + case []byte: + w.AppendBytes(v) + case int: + w.AppendString(formatInt(int64(v))) + case int8: + w.AppendString(formatInt(int64(v))) + case int16: + w.AppendString(formatInt(int64(v))) + case int32: + w.AppendString(formatInt(int64(v))) + case int64: + w.AppendString(formatInt(v)) + case uint: + w.AppendString(formatUint(uint64(v))) + case uint8: + w.AppendString(formatUint(uint64(v))) + case uint16: + w.AppendString(formatUint(uint64(v))) + case uint32: + w.AppendString(formatUint(uint64(v))) + case uint64: + w.AppendString(formatUint(v)) + case float32: + w.AppendString(formatFloat(float64(v))) + case float64: + w.AppendString(formatFloat(v)) + case bool: + if v { + w.AppendString("1") + } else { + w.AppendString("0") + } + case encoding.BinaryMarshaler: + b, err := v.MarshalBinary() + if err != nil { + return err + } + w.AppendBytes(b) + default: + return fmt.Errorf( + "redis: can't marshal %T (consider implementing encoding.BinaryMarshaler)", val) + } + return nil +} + +func (w *WriteBuffer) AppendString(s string) { + w.b = append(w.b, StringReply) + w.b = strconv.AppendUint(w.b, uint64(len(s)), 10) + w.b = append(w.b, '\r', '\n') + w.b = append(w.b, s...) + w.b = append(w.b, '\r', '\n') +} + +func (w *WriteBuffer) AppendBytes(p []byte) { + w.b = append(w.b, StringReply) + w.b = strconv.AppendUint(w.b, uint64(len(p)), 10) + w.b = append(w.b, '\r', '\n') + w.b = append(w.b, p...) + w.b = append(w.b, '\r', '\n') +} + +func formatInt(n int64) string { + return strconv.FormatInt(n, 10) +} + +func formatUint(u uint64) string { + return strconv.FormatUint(u, 10) +} + +func formatFloat(f float64) string { + return strconv.FormatFloat(f, 'f', -1, 64) +} |