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89 lines
1.4 KiB
89 lines
1.4 KiB
package buf
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import (
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"io"
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"net"
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)
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type MultiBufferWriter interface {
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WriteMultiBuffer(MultiBuffer) (int, error)
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}
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type MultiBuffer []*Buffer
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func NewMultiBuffer() MultiBuffer {
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return MultiBuffer(make([]*Buffer, 0, 8))
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}
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func NewMultiBufferValue(b ...*Buffer) MultiBuffer {
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return MultiBuffer(b)
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}
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func (b *MultiBuffer) Append(buf *Buffer) {
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*b = append(*b, buf)
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}
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func (b *MultiBuffer) AppendMulti(mb MultiBuffer) {
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*b = append(*b, mb...)
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}
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func (mb *MultiBuffer) Read(b []byte) (int, error) {
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if len(*mb) == 0 {
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return 0, io.EOF
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}
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endIndex := len(*mb)
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totalBytes := 0
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for i, bb := range *mb {
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nBytes, err := bb.Read(b)
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totalBytes += nBytes
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if err != nil {
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return totalBytes, err
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}
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b = b[nBytes:]
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if bb.IsEmpty() {
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bb.Release()
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} else {
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endIndex = i
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break
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}
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}
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*mb = (*mb)[endIndex:]
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return totalBytes, nil
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}
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func (mb MultiBuffer) WriteTo(writer io.Writer) (int, error) {
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if mw, ok := writer.(MultiBufferWriter); ok {
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return mw.WriteMultiBuffer(mb)
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}
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bs := make([][]byte, len(mb))
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for i, b := range mb {
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bs[i] = b.Bytes()
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}
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nbs := net.Buffers(bs)
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nBytes, err := nbs.WriteTo(writer)
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return int(nBytes), err
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}
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func (mb MultiBuffer) Len() int {
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size := 0
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for _, b := range mb {
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size += b.Len()
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}
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return size
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}
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func (mb MultiBuffer) IsEmpty() bool {
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for _, b := range mb {
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if !b.IsEmpty() {
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return false
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}
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}
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return true
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}
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func (mb MultiBuffer) Release() {
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for _, b := range mb {
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b.Release()
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}
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}
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