forked from mirror/redis
104 lines
2.2 KiB
Go
104 lines
2.2 KiB
Go
package proto
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import (
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"encoding"
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"fmt"
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"strconv"
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)
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const bufferSize = 4096
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type WriteBuffer struct{ b []byte }
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func NewWriteBuffer() *WriteBuffer {
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return &WriteBuffer{
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b: make([]byte, 0, bufferSize),
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}
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}
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func (w *WriteBuffer) Len() int { return len(w.b) }
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func (w *WriteBuffer) Bytes() []byte { return w.b }
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func (w *WriteBuffer) Reset() { w.b = w.b[:0] }
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func (w *WriteBuffer) Append(args []interface{}) error {
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w.b = append(w.b, ArrayReply)
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w.b = strconv.AppendUint(w.b, uint64(len(args)), 10)
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w.b = append(w.b, '\r', '\n')
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for _, arg := range args {
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if err := w.append(arg); err != nil {
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return err
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}
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}
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return nil
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}
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func (w *WriteBuffer) append(val interface{}) error {
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switch v := val.(type) {
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case nil:
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w.AppendString("")
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case string:
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w.AppendString(v)
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case []byte:
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w.AppendBytes(v)
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case int:
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w.AppendString(formatInt(int64(v)))
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case int8:
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w.AppendString(formatInt(int64(v)))
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case int16:
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w.AppendString(formatInt(int64(v)))
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case int32:
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w.AppendString(formatInt(int64(v)))
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case int64:
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w.AppendString(formatInt(v))
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case uint:
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w.AppendString(formatUint(uint64(v)))
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case uint8:
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w.AppendString(formatUint(uint64(v)))
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case uint16:
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w.AppendString(formatUint(uint64(v)))
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case uint32:
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w.AppendString(formatUint(uint64(v)))
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case uint64:
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w.AppendString(formatUint(v))
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case float32:
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w.AppendString(formatFloat(float64(v)))
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case float64:
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w.AppendString(formatFloat(v))
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case bool:
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if v {
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w.AppendString("1")
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} else {
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w.AppendString("0")
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}
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default:
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if bm, ok := val.(encoding.BinaryMarshaler); ok {
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bb, err := bm.MarshalBinary()
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if err != nil {
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return err
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}
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w.AppendBytes(bb)
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} else {
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return fmt.Errorf(
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"redis: can't marshal %T (consider implementing encoding.BinaryMarshaler)", val)
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}
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}
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return nil
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}
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func (w *WriteBuffer) AppendString(s string) {
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w.b = append(w.b, StringReply)
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w.b = strconv.AppendUint(w.b, uint64(len(s)), 10)
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w.b = append(w.b, '\r', '\n')
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w.b = append(w.b, s...)
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w.b = append(w.b, '\r', '\n')
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}
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func (w *WriteBuffer) AppendBytes(p []byte) {
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w.b = append(w.b, StringReply)
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w.b = strconv.AppendUint(w.b, uint64(len(p)), 10)
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w.b = append(w.b, '\r', '\n')
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w.b = append(w.b, p...)
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w.b = append(w.b, '\r', '\n')
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}
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