initial commit, 4.5 stable

core/io/stream_peer_gzip.h

@@ -0,0 +1,73 @@
+/**************************************************************************/
+/*  stream_peer_gzip.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/io/stream_peer.h"
+
+#include "core/core_bind.h"
+#include "core/io/compression.h"
+#include "core/templates/ring_buffer.h"
+
+class StreamPeerGZIP : public StreamPeer {
+	GDCLASS(StreamPeerGZIP, StreamPeer);
+
+private:
+	void *ctx = nullptr; // Will hold our z_stream instance.
+	bool compressing = true;
+
+	RingBuffer<uint8_t> rb;
+	Vector<uint8_t> buffer;
+
+	Error _process(uint8_t *p_dst, int p_dst_size, const uint8_t *p_src, int p_src_size, int &r_consumed, int &r_out, bool p_close = false);
+	void _close();
+	Error _start(bool p_compress, bool p_is_deflate, int buffer_size = 65535);
+
+protected:
+	static void _bind_methods();
+
+public:
+	Error start_compression(bool p_is_deflate, int buffer_size = 65535);
+	Error start_decompression(bool p_is_deflate, int buffer_size = 65535);
+
+	Error finish();
+	void clear();
+
+	virtual Error put_data(const uint8_t *p_data, int p_bytes) override;
+	virtual Error put_partial_data(const uint8_t *p_data, int p_bytes, int &r_sent) override;
+
+	virtual Error get_data(uint8_t *p_buffer, int p_bytes) override;
+	virtual Error get_partial_data(uint8_t *p_buffer, int p_bytes, int &r_received) override;
+
+	virtual int get_available_bytes() const override;
+
+	StreamPeerGZIP();
+	~StreamPeerGZIP();
+};