vli_size.c revision 302408 
1///////////////////////////////////////////////////////////////////////////////
2//
3/// \file       vli_size.c
4/// \brief      Calculates the encoded size of a variable-length integer
5//
6//  Author:     Lasse Collin
7//
8//  This file has been put into the public domain.
9//  You can do whatever you want with this file.
10//
11///////////////////////////////////////////////////////////////////////////////
12
13#include "common.h"
14
15
16extern LZMA_API(uint32_t)
17lzma_vli_size(lzma_vli vli)
18{
19	if (vli > LZMA_VLI_MAX)
20		return 0;
21
22	uint32_t i = 0;
23	do {
24		vli >>= 7;
25		++i;
26	} while (vli != 0);
27
28	assert(i <= LZMA_VLI_BYTES_MAX);
29	return i;
30}
31