mirror of
https://git.do.srb2.org/STJr/SRB2.git
synced 2024-12-11 13:21:56 +00:00
25 lines
906 B
C
25 lines
906 B
C
|
/* $Id: codelength.h,v 1.1 2008/10/06 22:04:06 nanard Exp $ */
|
||
|
|
/* Project : miniupnp
|
||
|
|
* Author : Thomas BERNARD
|
||
|
|
* copyright (c) 2005-2008 Thomas Bernard
|
||
|
|
* This software is subjet to the conditions detailed in the
|
||
|
|
* provided LICENCE file. */
|
||
|
|
#ifndef __CODELENGTH_H__
|
||
|
|
#define __CODELENGTH_H__
|
||
|
|
|
||
|
|
/* Encode length by using 7bit per Byte :
|
||
|
|
* Most significant bit of each byte specifies that the
|
||
|
|
* following byte is part of the code */
|
||
|
|
#define DECODELENGTH(n, p) n = 0; \
|
||
|
|
do { n = (n << 7) | (*p & 0x7f); } \
|
||
|
|
while(*(p++)&0x80);
|
||
|
|
|
||
|
|
#define CODELENGTH(n, p) if(n>=268435456) *(p++) = (n >> 28) | 0x80; \
|
||
|
|
if(n>=2097152) *(p++) = (n >> 21) | 0x80; \
|
||
|
|
if(n>=16384) *(p++) = (n >> 14) | 0x80; \
|
||
|
|
if(n>=128) *(p++) = (n >> 7) | 0x80; \
|
||
|
|
*(p++) = n & 0x7f;
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|