1 files changed, 45 insertions, 0 deletions
diff --git a/src/liblzma/simple/simple_encoder.c b/src/liblzma/simple/simple_encoder.c
new file mode 100644
index 00000000..15d888d9
--- /dev/null
+++ b/src/liblzma/simple/simple_encoder.c
@@ -0,0 +1,45 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       simple_encoder.c
+/// \brief      Properties encoder 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_encoder.h"
+
+
+extern lzma_ret
+lzma_simple_props_size(uint32_t *size, const void *options)
+{
+	const lzma_options_simple *const opt = options;
+	*size = (opt == NULL || opt->start_offset == 0) ? 0 : 4;
+	return LZMA_OK;
+}
+
+
+extern lzma_ret
+lzma_simple_props_encode(const void *options, uint8_t *out)
+{
+	const lzma_options_simple *const opt = options;
+
+	// The default start offset is zero, so we don't need to store any
+	// options unless the start offset is non-zero.
+	if (opt == NULL || opt->start_offset == 0)
+		return LZMA_OK;
+
+	integer_write_32(out, opt->start_offset);
+
+	return LZMA_OK;
+}