initial commit, 4.5 stable

core/io/compression.h

@@ -0,0 +1,59 @@
+/**************************************************************************/
+/*  compression.h                                                         */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "core/templates/vector.h"
+#include "core/typedefs.h"
+
+#include <zlib.h>
+
+class Compression {
+public:
+	static inline int zlib_level = Z_DEFAULT_COMPRESSION;
+	static inline int gzip_level = Z_DEFAULT_COMPRESSION;
+	static inline int zstd_level = 3;
+	static inline bool zstd_long_distance_matching = false;
+	static inline int zstd_window_log_size = 27; // ZSTD_WINDOWLOG_LIMIT_DEFAULT
+	static inline int gzip_chunk = 16384;
+
+	enum Mode : int32_t {
+		MODE_FASTLZ,
+		MODE_DEFLATE,
+		MODE_ZSTD,
+		MODE_GZIP,
+		MODE_BROTLI
+	};
+
+	static int64_t compress(uint8_t *p_dst, const uint8_t *p_src, int64_t p_src_size, Mode p_mode = MODE_ZSTD);
+	static int64_t get_max_compressed_buffer_size(int64_t p_src_size, Mode p_mode = MODE_ZSTD);
+	static int64_t decompress(uint8_t *p_dst, int64_t p_dst_max_size, const uint8_t *p_src, int64_t p_src_size, Mode p_mode = MODE_ZSTD);
+	static int decompress_dynamic(Vector<uint8_t> *p_dst_vect, int64_t p_max_dst_size, const uint8_t *p_src, int64_t p_src_size, Mode p_mode);
+};