mirror of
https://github.com/OpenRCT2/OpenRCT2
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67 lines
2.4 KiB
C
67 lines
2.4 KiB
C
#pragma region Copyright (c) 2014-2016 OpenRCT2 Developers
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/*****************************************************************************
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* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
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*
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* OpenRCT2 is the work of many authors, a full list can be found in contributors.md
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* For more information, visit https://github.com/OpenRCT2/OpenRCT2
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*
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* OpenRCT2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* A full copy of the GNU General Public License can be found in licence.txt
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*****************************************************************************/
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#pragma endregion
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#ifndef _SAWYERCODING_H_
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#define _SAWYERCODING_H_
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#include <SDL.h>
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#include "../common.h"
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#pragma pack(push, 1)
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typedef struct sawyercoding_chunk_header {
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uint8 encoding;
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uint32 length;
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} sawyercoding_chunk_header;
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assert_struct_size(sawyercoding_chunk_header, 5);
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#pragma pack(pop)
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enum {
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CHUNK_ENCODING_NONE,
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CHUNK_ENCODING_RLE,
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CHUNK_ENCODING_RLECOMPRESSED,
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CHUNK_ENCODING_ROTATE
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};
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enum {
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FILE_VERSION_MASK = (3 << 0),
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FILE_VERSION_RCT1 = (0 << 0),
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FILE_VERSION_RCT1_AA = (1 << 0),
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FILE_VERSION_RCT1_LL = (2 << 0),
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FILE_TYPE_MASK = (3 << 2),
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FILE_TYPE_TD4 = (0 << 2),
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FILE_TYPE_SV4 = (1 << 2),
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FILE_TYPE_SC4 = (2 << 2)
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};
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int sawyercoding_validate_checksum(SDL_RWops* rw);
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uint32 sawyercoding_calculate_checksum(const uint8* buffer, size_t length);
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bool sawyercoding_read_chunk_safe(SDL_RWops *rw, void *dst, size_t dstLength);
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size_t sawyercoding_read_chunk(SDL_RWops* rw, uint8 *buffer);
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size_t sawyercoding_read_chunk_with_size(SDL_RWops* rw, uint8 *buffer, const size_t buffer_size);
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size_t sawyercoding_write_chunk_buffer(uint8 *dst_file, uint8* buffer, sawyercoding_chunk_header chunkHeader);
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size_t sawyercoding_decode_sv4(const uint8 *src, uint8 *dst, size_t length);
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size_t sawyercoding_decode_sc4(const uint8 *src, uint8 *dst, size_t length);
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size_t sawyercoding_encode_sv4(const uint8 *src, uint8 *dst, size_t length);
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size_t sawyercoding_decode_td6(const uint8 *src, uint8 *dst, size_t length);
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size_t sawyercoding_encode_td6(const uint8 *src, uint8 *dst, size_t length);
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int sawyercoding_validate_track_checksum(const uint8* src, size_t length);
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int sawyercoding_detect_file_type(const uint8 *src, size_t length);
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int sawyercoding_detect_rct1_version(int gameVersion);
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#endif
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