1 files changed, 63 insertions, 0 deletions
diff --git a/gfx/angle/checkout/third_party/zlib/google/compression_utils_portable.h b/gfx/angle/checkout/third_party/zlib/google/compression_utils_portable.h
new file mode 100644
index 0000000000..92b033e889
--- /dev/null
+++ b/gfx/angle/checkout/third_party/zlib/google/compression_utils_portable.h
@@ -0,0 +1,63 @@
+/* compression_utils_portable.h
+ *
+ * Copyright 2019 The Chromium Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the Chromium source repository LICENSE file.
+ */
+#ifndef THIRD_PARTY_ZLIB_GOOGLE_COMPRESSION_UTILS_PORTABLE_H_
+#define THIRD_PARTY_ZLIB_GOOGLE_COMPRESSION_UTILS_PORTABLE_H_
+
+#include <stdint.h>
+
+/* TODO(cavalcantii): remove support for Chromium ever building with a system
+ * zlib.
+ */
+#if defined(USE_SYSTEM_ZLIB)
+#include <zlib.h>
+/* AOSP build requires relative paths. */
+#else
+#include "zlib.h"
+#endif
+
+namespace zlib_internal {
+
+enum WrapperType {
+  ZLIB,
+  GZIP,
+  ZRAW,
+};
+
+uLongf GzipExpectedCompressedSize(uLongf input_size);
+
+uint32_t GetGzipUncompressedSize(const Bytef* compressed_data, size_t length);
+
+int GzipCompressHelper(Bytef* dest,
+                       uLongf* dest_length,
+                       const Bytef* source,
+                       uLong source_length,
+                       void* (*malloc_fn)(size_t),
+                       void (*free_fn)(void*));
+
+int CompressHelper(WrapperType wrapper_type,
+                   Bytef* dest,
+                   uLongf* dest_length,
+                   const Bytef* source,
+                   uLong source_length,
+                   int compression_level,
+                   void* (*malloc_fn)(size_t),
+                   void (*free_fn)(void*));
+
+int GzipUncompressHelper(Bytef* dest,
+                         uLongf* dest_length,
+                         const Bytef* source,
+                         uLong source_length);
+
+int UncompressHelper(WrapperType wrapper_type,
+                     Bytef* dest,
+                     uLongf* dest_length,
+                     const Bytef* source,
+                     uLong source_length);
+
+}  // namespace zlib_internal
+
+#endif  // THIRD_PARTY_ZLIB_GOOGLE_COMPRESSION_UTILS_PORTABLE_H_