vendorify
diff --git a/go/vendor/github.com/mailru/easyjson/buffer/pool.go b/go/vendor/github.com/mailru/easyjson/buffer/pool.go
new file mode 100644
index 0000000..07fb4bc
--- /dev/null
+++ b/go/vendor/github.com/mailru/easyjson/buffer/pool.go
@@ -0,0 +1,270 @@
+// Package buffer implements a buffer for serialization, consisting of a chain of []byte-s to
+// reduce copying and to allow reuse of individual chunks.
+package buffer
+
+import (
+ "io"
+ "sync"
+)
+
+// PoolConfig contains configuration for the allocation and reuse strategy.
+type PoolConfig struct {
+ StartSize int // Minimum chunk size that is allocated.
+ PooledSize int // Minimum chunk size that is reused, reusing chunks too small will result in overhead.
+ MaxSize int // Maximum chunk size that will be allocated.
+}
+
+var config = PoolConfig{
+ StartSize: 128,
+ PooledSize: 512,
+ MaxSize: 32768,
+}
+
+// Reuse pool: chunk size -> pool.
+var buffers = map[int]*sync.Pool{}
+
+func initBuffers() {
+ for l := config.PooledSize; l <= config.MaxSize; l *= 2 {
+ buffers[l] = new(sync.Pool)
+ }
+}
+
+func init() {
+ initBuffers()
+}
+
+// Init sets up a non-default pooling and allocation strategy. Should be run before serialization is done.
+func Init(cfg PoolConfig) {
+ config = cfg
+ initBuffers()
+}
+
+// putBuf puts a chunk to reuse pool if it can be reused.
+func putBuf(buf []byte) {
+ size := cap(buf)
+ if size < config.PooledSize {
+ return
+ }
+ if c := buffers[size]; c != nil {
+ c.Put(buf[:0])
+ }
+}
+
+// getBuf gets a chunk from reuse pool or creates a new one if reuse failed.
+func getBuf(size int) []byte {
+ if size < config.PooledSize {
+ return make([]byte, 0, size)
+ }
+
+ if c := buffers[size]; c != nil {
+ v := c.Get()
+ if v != nil {
+ return v.([]byte)
+ }
+ }
+ return make([]byte, 0, size)
+}
+
+// Buffer is a buffer optimized for serialization without extra copying.
+type Buffer struct {
+
+ // Buf is the current chunk that can be used for serialization.
+ Buf []byte
+
+ toPool []byte
+ bufs [][]byte
+}
+
+// EnsureSpace makes sure that the current chunk contains at least s free bytes,
+// possibly creating a new chunk.
+func (b *Buffer) EnsureSpace(s int) {
+ if cap(b.Buf)-len(b.Buf) >= s {
+ return
+ }
+ l := len(b.Buf)
+ if l > 0 {
+ if cap(b.toPool) != cap(b.Buf) {
+ // Chunk was reallocated, toPool can be pooled.
+ putBuf(b.toPool)
+ }
+ if cap(b.bufs) == 0 {
+ b.bufs = make([][]byte, 0, 8)
+ }
+ b.bufs = append(b.bufs, b.Buf)
+ l = cap(b.toPool) * 2
+ } else {
+ l = config.StartSize
+ }
+
+ if l > config.MaxSize {
+ l = config.MaxSize
+ }
+ b.Buf = getBuf(l)
+ b.toPool = b.Buf
+}
+
+// AppendByte appends a single byte to buffer.
+func (b *Buffer) AppendByte(data byte) {
+ if cap(b.Buf) == len(b.Buf) { // EnsureSpace won't be inlined.
+ b.EnsureSpace(1)
+ }
+ b.Buf = append(b.Buf, data)
+}
+
+// AppendBytes appends a byte slice to buffer.
+func (b *Buffer) AppendBytes(data []byte) {
+ for len(data) > 0 {
+ if cap(b.Buf) == len(b.Buf) { // EnsureSpace won't be inlined.
+ b.EnsureSpace(1)
+ }
+
+ sz := cap(b.Buf) - len(b.Buf)
+ if sz > len(data) {
+ sz = len(data)
+ }
+
+ b.Buf = append(b.Buf, data[:sz]...)
+ data = data[sz:]
+ }
+}
+
+// AppendBytes appends a string to buffer.
+func (b *Buffer) AppendString(data string) {
+ for len(data) > 0 {
+ if cap(b.Buf) == len(b.Buf) { // EnsureSpace won't be inlined.
+ b.EnsureSpace(1)
+ }
+
+ sz := cap(b.Buf) - len(b.Buf)
+ if sz > len(data) {
+ sz = len(data)
+ }
+
+ b.Buf = append(b.Buf, data[:sz]...)
+ data = data[sz:]
+ }
+}
+
+// Size computes the size of a buffer by adding sizes of every chunk.
+func (b *Buffer) Size() int {
+ size := len(b.Buf)
+ for _, buf := range b.bufs {
+ size += len(buf)
+ }
+ return size
+}
+
+// DumpTo outputs the contents of a buffer to a writer and resets the buffer.
+func (b *Buffer) DumpTo(w io.Writer) (written int, err error) {
+ var n int
+ for _, buf := range b.bufs {
+ if err == nil {
+ n, err = w.Write(buf)
+ written += n
+ }
+ putBuf(buf)
+ }
+
+ if err == nil {
+ n, err = w.Write(b.Buf)
+ written += n
+ }
+ putBuf(b.toPool)
+
+ b.bufs = nil
+ b.Buf = nil
+ b.toPool = nil
+
+ return
+}
+
+// BuildBytes creates a single byte slice with all the contents of the buffer. Data is
+// copied if it does not fit in a single chunk. You can optionally provide one byte
+// slice as argument that it will try to reuse.
+func (b *Buffer) BuildBytes(reuse ...[]byte) []byte {
+ if len(b.bufs) == 0 {
+ ret := b.Buf
+ b.toPool = nil
+ b.Buf = nil
+ return ret
+ }
+
+ var ret []byte
+ size := b.Size()
+
+ // If we got a buffer as argument and it is big enought, reuse it.
+ if len(reuse) == 1 && cap(reuse[0]) >= size {
+ ret = reuse[0][:0]
+ } else {
+ ret = make([]byte, 0, size)
+ }
+ for _, buf := range b.bufs {
+ ret = append(ret, buf...)
+ putBuf(buf)
+ }
+
+ ret = append(ret, b.Buf...)
+ putBuf(b.toPool)
+
+ b.bufs = nil
+ b.toPool = nil
+ b.Buf = nil
+
+ return ret
+}
+
+type readCloser struct {
+ offset int
+ bufs [][]byte
+}
+
+func (r *readCloser) Read(p []byte) (n int, err error) {
+ for _, buf := range r.bufs {
+ // Copy as much as we can.
+ x := copy(p[n:], buf[r.offset:])
+ n += x // Increment how much we filled.
+
+ // Did we empty the whole buffer?
+ if r.offset+x == len(buf) {
+ // On to the next buffer.
+ r.offset = 0
+ r.bufs = r.bufs[1:]
+
+ // We can release this buffer.
+ putBuf(buf)
+ } else {
+ r.offset += x
+ }
+
+ if n == len(p) {
+ break
+ }
+ }
+ // No buffers left or nothing read?
+ if len(r.bufs) == 0 {
+ err = io.EOF
+ }
+ return
+}
+
+func (r *readCloser) Close() error {
+ // Release all remaining buffers.
+ for _, buf := range r.bufs {
+ putBuf(buf)
+ }
+ // In case Close gets called multiple times.
+ r.bufs = nil
+
+ return nil
+}
+
+// ReadCloser creates an io.ReadCloser with all the contents of the buffer.
+func (b *Buffer) ReadCloser() io.ReadCloser {
+ ret := &readCloser{0, append(b.bufs, b.Buf)}
+
+ b.bufs = nil
+ b.toPool = nil
+ b.Buf = nil
+
+ return ret
+}