Create append.go

Author: CAFxX

append.go

@@ -0,0 +1,20 @@
+package bytespool
+
+// Append appends the specified bytes to the buf byte slice.
+// The buf byte slice passed to Append MUST NOT be used after
+// Append is called: only the byte slice returned should be
+// used.
+func Append(buf []byte, v ...byte) []byte {
+  if len(v) <= cap(buf)-len(buf) {
+    return append(buf, v...)
+  }
+  return appendSlow(buf, v...)
+}
+
+func appendSlow(buf []byte, v ...byte) []byte {
+  pbuf := GetBytesSlicePtr((len(v)+len(buf))*2)
+  nbuf := append(append((*pbuf)[:0], buf...), v...)
+  *pbuf = buf
+  PutBytesSlicePtr(pbuf)
+  return nbuf
+}