1 files changed, 47 insertions, 0 deletions
diff --git a/src/liblzma/simple/simple_decoder.c b/src/liblzma/simple/simple_decoder.c
new file mode 100644
index 00000000..72f8ee16
--- /dev/null
+++ b/src/liblzma/simple/simple_decoder.c
@@ -0,0 +1,47 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \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;
+}