integrate lzma

[zpackage] / lzma / common / vli_size.c

diff --git a/lzma/common/vli_size.c b/lzma/common/vli_size.c
new file mode 100644 (file)
index 0000000..ec1b4fa
--- /dev/null
+++ b/lzma/common/vli_size.c
@@ -0,0 +1,30 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       vli_size.c
+/// \brief      Calculates the encoded size of a variable-length integer
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "common.h"
+
+
+extern LZMA_API(uint32_t)
+lzma_vli_size(lzma_vli vli)
+{
+       if (vli > LZMA_VLI_MAX)
+               return 0;
+
+       uint32_t i = 0;
+       do {
+               vli >>= 7;
+               ++i;
+       } while (vli != 0);
+
+       assert(i <= LZMA_VLI_BYTES_MAX);
+       return i;
+}