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Annotation of embedaddon/miniupnpd/codelength.h, revision 1.1.1.1

1.1       misho       1: /* $Id: codelength.h,v 1.1 2008/10/06 22:04:06 nanard Exp $ */
                      2: /* Project : miniupnp
                      3:  * Author : Thomas BERNARD
                      4:  * copyright (c) 2005-2008 Thomas Bernard
                      5:  * This software is subjet to the conditions detailed in the
                      6:  * provided LICENCE file. */
                      7: #ifndef __CODELENGTH_H__
                      8: #define __CODELENGTH_H__
                      9: 
                     10: /* Encode length by using 7bit per Byte :
                     11:  * Most significant bit of each byte specifies that the
                     12:  * following byte is part of the code */
                     13: #define DECODELENGTH(n, p) n = 0; \
                     14:                            do { n = (n << 7) | (*p & 0x7f); } \
                     15:                            while(*(p++)&0x80);
                     16: 
                     17: #define CODELENGTH(n, p) if(n>=268435456) *(p++) = (n >> 28) | 0x80; \
                     18:                          if(n>=2097152) *(p++) = (n >> 21) | 0x80; \
                     19:                          if(n>=16384) *(p++) = (n >> 14) | 0x80; \
                     20:                          if(n>=128) *(p++) = (n >> 7) | 0x80; \
                     21:                          *(p++) = n & 0x7f;
                     22: 
                     23: #endif
                     24: