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-rw-r--r--src/liblzma/simple/simple_decoder.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/src/liblzma/simple/simple_decoder.c b/src/liblzma/simple/simple_decoder.c
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+++ b/src/liblzma/simple/simple_decoder.c
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+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file simple_decoder.c
+/// \brief Properties decoder for simple filters
+//
+// 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 "simple_decoder.h"
+
+
+extern lzma_ret
+lzma_simple_props_decode(void **options, lzma_allocator *allocator,
+ const uint8_t *props, size_t props_size)
+{
+ if (props_size == 0)
+ return LZMA_OK;
+
+ if (props_size != 4)
+ return LZMA_HEADER_ERROR;
+
+ lzma_options_simple *opt = lzma_alloc(
+ sizeof(lzma_options_simple), allocator);
+ if (opt == NULL)
+ return LZMA_MEM_ERROR;
+
+ opt->start_offset = integer_read_32(props);
+
+ // Don't leave an options structure allocated if start_offset is zero.
+ if (opt->start_offset == 0)
+ lzma_free(opt, allocator);
+ else
+ *options = opt;
+
+ return LZMA_OK;
+}