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C语言生成随机uuid编码
转自:http://www.open-open.com/code/view/1431934941958
#include <stdio.h>
#include <stdlib.h>/*** Create random UUID** @param buf - buffer to be filled with the uuid string*/
char *random_uuid( char buf[37] )
{const char *c = "89ab";char *p = buf;int n;for( n = 0; n < 16; ++n ){int b = rand()%255;switch( n ){case 6:sprintf(p,"4%x",b%15 );break;case 8:sprintf(p,"%c%x",c[rand()%strlen( c )],b%15 );break;default:sprintf(p,"%02x",b );break;}p += 2;switch( n ){case 3:case 5:case 7:case 9:*p++ = '-';break;}}*p = 0;return buf;
}
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