1 files changed, 37 insertions, 0 deletions
diff --git a/src/liblzma/common/vli_size.c b/src/liblzma/common/vli_size.c
new file mode 100644
index 00000000..547bba0b
--- /dev/null
+++ b/src/liblzma/common/vli_size.c
@@ -0,0 +1,37 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       vli_size.c
+/// \brief      Calculates the encoded size of a variable-length integer
+//
+//  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 "common.h"
+
+
+extern LZMA_API uint32_t
+lzma_vli_size(lzma_vli vli)
+{
+	if (vli > LZMA_VLI_VALUE_MAX)
+		return 0;
+
+	uint32_t i = 0;
+	do {
+		vli >>= 7;
+		++i;
+	} while (vli != 0);
+
+	assert(i <= LZMA_VLI_BYTES_MAX);
+	return i;
+}