/*************************************************************************/
/*  stream_peer_gzip.h                                                   */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
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#ifndef STREAM_PEER_GZIP_H
#define STREAM_PEER_GZIP_H

#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();
};

#endif // STREAM_PEER_GZIP_H