From 30bf0f51335e87812ffeb54e9437f0b6a1514d67 Mon Sep 17 00:00:00 2001 From: "Juan J. Martinez" Date: Tue, 6 Sep 2022 07:37:20 +0100 Subject: Updated rasm to 1.7 --- tools/rasm/lzsa-master/src/expand_context.c | 76 +++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) create mode 100644 tools/rasm/lzsa-master/src/expand_context.c (limited to 'tools/rasm/lzsa-master/src/expand_context.c') diff --git a/tools/rasm/lzsa-master/src/expand_context.c b/tools/rasm/lzsa-master/src/expand_context.c new file mode 100644 index 0000000..b02620d --- /dev/null +++ b/tools/rasm/lzsa-master/src/expand_context.c @@ -0,0 +1,76 @@ +/* + * expand_context.h - decompressor context definitions + * + * Copyright (C) 2019 Emmanuel Marty + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any damages + * arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute it + * freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must not + * claim that you wrote the original software. If you use this software + * in a product, an acknowledgment in the product documentation would be + * appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must not be + * misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source distribution. + */ + +/* + * Uses the libdivsufsort library Copyright (c) 2003-2008 Yuta Mori + * + * Inspired by LZ4 by Yann Collet. https://github.com/lz4/lz4 + * With help, ideas, optimizations and speed measurements by spke + * With ideas from Lizard by Przemyslaw Skibinski and Yann Collet. https://github.com/inikep/lizard + * Also with ideas from smallz4 by Stephan Brumme. https://create.stephan-brumme.com/smallz4/ + * + */ + +#include +#include +#include "expand_context.h" +#include "expand_block_v1.h" +#include "expand_block_v2.h" +#include "lib.h" + +/** + * Decompress one data block + * + * @param pInBlock pointer to compressed data + * @param nBlockSize size of compressed data, in bytes + * @param pOutData pointer to output decompression buffer (previously decompressed bytes + room for decompressing this block) + * @param nOutDataOffset starting index of where to store decompressed bytes in output buffer (and size of previously decompressed bytes) + * @param nBlockMaxSize total size of output decompression buffer, in bytes + * @param nFormatVersion version of format to use (1-2) + * @param nFlags compression flags (LZSA_FLAG_xxx) + * + * @return size of decompressed data in bytes, or -1 for error + */ +int lzsa_decompressor_expand_block(unsigned char *pInBlock, int nBlockSize, unsigned char *pOutData, int nOutDataOffset, int nBlockMaxSize, const int nFormatVersion, const int nFlags) { + int nDecompressedSize; + + if (nFlags & LZSA_FLAG_RAW_BACKWARD) { + lzsa_reverse_buffer(pInBlock, nBlockSize); + } + + if (nFormatVersion == 1) + nDecompressedSize = lzsa_decompressor_expand_block_v1(pInBlock, nBlockSize, pOutData, nOutDataOffset, nBlockMaxSize); + else if (nFormatVersion == 2) + nDecompressedSize = lzsa_decompressor_expand_block_v2(pInBlock, nBlockSize, pOutData, nOutDataOffset, nBlockMaxSize); + else + nDecompressedSize = -1; + + if (nDecompressedSize != -1 && (nFlags & LZSA_FLAG_RAW_BACKWARD)) { + lzsa_reverse_buffer(pOutData + nOutDataOffset, nDecompressedSize); + } + + if (nFlags & LZSA_FLAG_RAW_BACKWARD) { + lzsa_reverse_buffer(pInBlock, nBlockSize); + } + + return nDecompressedSize; +} -- cgit v1.2.3