Add brotli decompressor

This commit is for the decoder for brotli compression format.
Brotli is a generic byte-level compression algorithm.

brotli/dec/decode.h

@@ -0,0 +1,46 @@
+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// API for Brotli decompression
+
+#ifndef BROTLI_DEC_DECODE_H_
+#define BROTLI_DEC_DECODE_H_
+
+#include "./types.h"
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+// Sets *decoded_size to the decompressed size of the given encoded stream.
+// Returns 1 on success, 0 on failure.
+int BrotliDecompressedSize(size_t encoded_size,
+                           const uint8_t* encoded_buffer,
+                           size_t* decoded_size);
+
+// Decompresses the data in encoded_buffer into decoded_buffer, and sets
+// *decoded_size to the decompressed length.
+// Returns 0 if there was either a bit stream error or memory allocation error,
+// and 1 otherwise.
+// If decoded size is zero, returns 1 and keeps decoded_buffer unchanged.
+int BrotliDecompressBuffer(size_t encoded_size,
+                           const uint8_t* encoded_buffer,
+                           size_t* decoded_size,
+                           uint8_t* decoded_buffer);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+}    // extern "C"
+#endif
+
+#endif  // BROTLI_DEC_DECODE_H_