Vidalia 0.2.12
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00001 /* $Id: codelength.h,v 1.1 2008/10/06 22:04:06 nanard Exp $ */ 00002 /* Project : miniupnp 00003 * Author : Thomas BERNARD 00004 * copyright (c) 2005-2008 Thomas Bernard 00005 * This software is subjet to the conditions detailed in the 00006 * provided LICENCE file. */ 00007 #ifndef __CODELENGTH_H__ 00008 #define __CODELENGTH_H__ 00009 00010 /* Encode length by using 7bit per Byte : 00011 * Most significant bit of each byte specifies that the 00012 * following byte is part of the code */ 00013 #define DECODELENGTH(n, p) n = 0; \ 00014 do { n = (n << 7) | (*p & 0x7f); } \ 00015 while(*(p++)&0x80); 00016 00017 #define CODELENGTH(n, p) if(n>=268435456) *(p++) = (n >> 28) | 0x80; \ 00018 if(n>=2097152) *(p++) = (n >> 21) | 0x80; \ 00019 if(n>=16384) *(p++) = (n >> 14) | 0x80; \ 00020 if(n>=128) *(p++) = (n >> 7) | 0x80; \ 00021 *(p++) = n & 0x7f; 00022 00023 #endif 00024