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///////////////////////////////////////////////////////////////////////////////
//
/// \file stream_flags_common.c
/// \brief Common stuff for Stream flags coders
//
// Copyright (C) 2007-2008 Lasse Collin
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
///////////////////////////////////////////////////////////////////////////////
#include "stream_flags_common.h"
const uint8_t lzma_header_magic[6] = { 0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00 };
const uint8_t lzma_footer_magic[2] = { 0x59, 0x5A };
extern LZMA_API(lzma_ret)
lzma_stream_flags_compare(
const lzma_stream_flags *a, const lzma_stream_flags *b)
{
// We can compare only version 0 structures.
if (a->version != 0 || b->version != 0)
return LZMA_OPTIONS_ERROR;
// Check type
if ((unsigned int)(a->check) > LZMA_CHECK_ID_MAX
|| (unsigned int)(b->check) > LZMA_CHECK_ID_MAX)
return LZMA_PROG_ERROR;
if (a->check != b->check)
return LZMA_DATA_ERROR;
// Backward Sizes are compared only if they are known in both.
if (a->backward_size != LZMA_VLI_UNKNOWN
&& b->backward_size != LZMA_VLI_UNKNOWN) {
if (!is_backward_size_valid(a) || !is_backward_size_valid(b))
return LZMA_PROG_ERROR;
if (a->backward_size != b->backward_size)
return LZMA_DATA_ERROR;
}
return LZMA_OK;
}
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