replace zxq.co/ripple/hanayo

vendor/github.com/valyala/fasthttp/bytebuffer.go

@@ -0,0 +1,88 @@
+package fasthttp
+
+import (
+	"sync"
+)
+
+const (
+	defaultByteBufferSize = 128
+)
+
+// ByteBuffer provides byte buffer, which can be used with fasthttp API
+// in order to minimize memory allocations.
+//
+// ByteBuffer may be used with functions appending data to the given []byte
+// slice. See example code for details.
+//
+// Use AcquireByteBuffer for obtaining an empty byte buffer.
+type ByteBuffer struct {
+
+	// B is a byte buffer to use in append-like workloads.
+	// See example code for details.
+	B []byte
+}
+
+// Write implements io.Writer - it appends p to ByteBuffer.B
+func (b *ByteBuffer) Write(p []byte) (int, error) {
+	b.B = append(b.B, p...)
+	return len(p), nil
+}
+
+// WriteString appends s to ByteBuffer.B
+func (b *ByteBuffer) WriteString(s string) (int, error) {
+	b.B = append(b.B, s...)
+	return len(s), nil
+}
+
+// Set sets ByteBuffer.B to p
+func (b *ByteBuffer) Set(p []byte) {
+	b.B = append(b.B[:0], p...)
+}
+
+// SetString sets ByteBuffer.B to s
+func (b *ByteBuffer) SetString(s string) {
+	b.B = append(b.B[:0], s...)
+}
+
+// Reset makes ByteBuffer.B empty.
+func (b *ByteBuffer) Reset() {
+	b.B = b.B[:0]
+}
+
+// AcquireByteBuffer returns an empty byte buffer from the pool.
+//
+// Acquired byte buffer may be returned to the pool via ReleaseByteBuffer call.
+// This reduces the number of memory allocations required for byte buffer
+// management.
+func AcquireByteBuffer() *ByteBuffer {
+	return defaultByteBufferPool.Acquire()
+}
+
+// ReleaseByteBuffer returns byte buffer to the pool.
+//
+// ByteBuffer.B mustn't be touched after returning it to the pool.
+// Otherwise data races occur.
+func ReleaseByteBuffer(b *ByteBuffer) {
+	defaultByteBufferPool.Release(b)
+}
+
+type byteBufferPool struct {
+	pool sync.Pool
+}
+
+var defaultByteBufferPool byteBufferPool
+
+func (p *byteBufferPool) Acquire() *ByteBuffer {
+	v := p.pool.Get()
+	if v == nil {
+		return &ByteBuffer{
+			B: make([]byte, 0, defaultByteBufferSize),
+		}
+	}
+	return v.(*ByteBuffer)
+}
+
+func (p *byteBufferPool) Release(b *ByteBuffer) {
+	b.B = b.B[:0]
+	p.pool.Put(b)
+}