mirror of https://git.tukaani.org/xz.git
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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//
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/// \file simple_decoder.c
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/// \brief Properties decoder for simple filters
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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 "simple_decoder.h"
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extern lzma_ret
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lzma_simple_props_decode(void **options, lzma_allocator *allocator,
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const uint8_t *props, size_t props_size)
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{
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if (props_size == 0)
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return LZMA_OK;
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if (props_size != 4)
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return LZMA_HEADER_ERROR;
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lzma_options_simple *opt = lzma_alloc(
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sizeof(lzma_options_simple), allocator);
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if (opt == NULL)
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return LZMA_MEM_ERROR;
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opt->start_offset = integer_read_32(props);
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// Don't leave an options structure allocated if start_offset is zero.
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if (opt->start_offset == 0)
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lzma_free(opt, allocator);
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else
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*options = opt;
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return LZMA_OK;
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}
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