1 ///////////////////////////////////////////////////////////////////////////////
3 /// \file stream_flags_common.c
4 /// \brief Common stuff for Stream flags coders
6 // Copyright (C) 2007-2008 Lasse Collin
8 // This library is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU Lesser General Public
10 // License as published by the Free Software Foundation; either
11 // version 2.1 of the License, or (at your option) any later version.
13 // This library is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // Lesser General Public License for more details.
18 ///////////////////////////////////////////////////////////////////////////////
20 #include "stream_flags_common.h"
23 const uint8_t lzma_header_magic[6] = { 0xFD, 0x37, 0x7A, 0x58, 0x5A, 0x00 };
24 const uint8_t lzma_footer_magic[2] = { 0x59, 0x5A };
27 extern LZMA_API lzma_ret
28 lzma_stream_flags_compare(
29 const lzma_stream_flags *a, const lzma_stream_flags *b)
31 // We can compare only version 0 structures.
32 if (a->version != 0 || b->version != 0)
33 return LZMA_OPTIONS_ERROR;
36 if ((unsigned int)(a->check) > LZMA_CHECK_ID_MAX
37 || (unsigned int)(b->check) > LZMA_CHECK_ID_MAX)
38 return LZMA_PROG_ERROR;
40 if (a->check != b->check)
41 return LZMA_DATA_ERROR;
43 // Backward Sizes are compared only if they are known in both.
44 if (a->backward_size != LZMA_VLI_UNKNOWN
45 && b->backward_size != LZMA_VLI_UNKNOWN) {
46 if (!is_backward_size_valid(a) || !is_backward_size_valid(b))
47 return LZMA_PROG_ERROR;
49 if (a->backward_size != b->backward_size)
50 return LZMA_DATA_ERROR;