mirror of https://git.tukaani.org/xz.git
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
///////////////////////////////////////////////////////////////////////////////
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//
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/// \file stream_flags_common.c
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/// \brief Common stuff for Stream flags coders
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//
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// Copyright (C) 2007-2008 Lasse Collin
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "stream_flags_common.h"
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const uint8_t lzma_header_magic[6] = { 0xFF, 0x4C, 0x5A, 0x4D, 0x41, 0x00 };
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const uint8_t lzma_footer_magic[2] = { 0x59, 0x5A };
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extern LZMA_API lzma_ret
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lzma_stream_flags_compare(
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const lzma_stream_flags *a, const lzma_stream_flags *b)
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{
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// We can compare only version 0 structures.
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if (a->version != 0 || b->version != 0)
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return LZMA_OPTIONS_ERROR;
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// Check type
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if ((unsigned int)(a->check) > LZMA_CHECK_ID_MAX
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|| (unsigned int)(b->check) > LZMA_CHECK_ID_MAX)
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return LZMA_PROG_ERROR;
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if (a->check != b->check)
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return LZMA_DATA_ERROR;
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// Backward Sizes are compared only if they are known in both.
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if (a->backward_size != LZMA_VLI_UNKNOWN
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&& b->backward_size != LZMA_VLI_UNKNOWN) {
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if (!is_backward_size_valid(a) || !is_backward_size_valid(b))
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return LZMA_PROG_ERROR;
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if (a->backward_size != b->backward_size)
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return LZMA_DATA_ERROR;
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}
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return LZMA_OK;
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}
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