1/* Project : miniupnp
2 * Author : Thomas BERNARD
3 * copyright (c) 2005-2008 Thomas Bernard
4 * This software is subjet to the conditions detailed in the
5 * provided LICENCE file. */
6#ifndef __CODELENGTH_H__
7#define __CODELENGTH_H__
8
9/* Encode length by using 7bit per Byte :
10 * Most significant bit of each byte specifies that the
11 * following byte is part of the code */
12#define DECODELENGTH(n, p) n = 0; \
13                           do { n = (n << 7) | (*p & 0x7f); } \
14                           while(*(p++)&0x80);
15
16#define CODELENGTH(n, p) if(n>=268435456) *(p++) = (n >> 28) | 0x80; \
17                         if(n>=2097152) *(p++) = (n >> 21) | 0x80; \
18                         if(n>=16384) *(p++) = (n >> 14) | 0x80; \
19                         if(n>=128) *(p++) = (n >> 7) | 0x80; \
20                         *(p++) = n & 0x7f;
21
22#endif
23
24