source: vbox/trunk/src/libs/liblzma-5.4.1/common/vli_size.c

///////////////////////////////////////////////////////////////////////////////
//
/// \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;
}