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comparison mcabber/src/jabglue.c @ 1497:35020a2ed115

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Do not use srand()/rand() if better alternatives exist (mirabilos) arc4random(3) is a self-seeding PRNG available on a lot of OSes (all BSDs, Darwin / Mac OSX, Interix / Microsoft® Services for Unix, Windows® 2003SR1, Windows® Vista, Debian with the new libbsd package installed, ???) and much better than srand(3)/rand(3). Thanks to GNU autoconf, this can be made portable. http://www.mirbsd.org/man/arc4random.3 //mirabilos
author Mikael Berthe <mikael@lilotux.net>
date Mon, 30 Jun 2008 23:13:50 +0200
parents 1ae5fb9b04ca
children 68580b6be895
comparison
equal deleted inserted replaced
1496:b9f8c1fddb23 1497:35020a2ed115
565 static char *new_msgid(void) 565 static char *new_msgid(void)
566 { 566 {
567 static guint msg_idn; 567 static guint msg_idn;
568 time_t now; 568 time_t now;
569 time(&now); 569 time(&now);
570 #if HAVE_ARC4RANDOM
571 msg_idn += 1U + (unsigned int) (9.0 * (arc4random() / 4294967296.0));
572 #else
570 if (!msg_idn) 573 if (!msg_idn)
571 srand(now); 574 srand(now);
572 msg_idn += 1U + (unsigned int) (9.0 * (rand() / (RAND_MAX + 1.0))); 575 msg_idn += 1U + (unsigned int) (9.0 * (rand() / (RAND_MAX + 1.0)));
576 #endif
573 return g_strdup_printf("%u%d", msg_idn, (int)(now%10L)); 577 return g_strdup_printf("%u%d", msg_idn, (int)(now%10L));
574 } 578 }
575 579
576 // jb_send_msg(jid, text, type, subject, msgid, *encrypted, type_overwrite) 580 // jb_send_msg(jid, text, type, subject, msgid, *encrypted, type_overwrite)
577 // When encrypted is not NULL, the function set *encrypted to 1 if the 581 // When encrypted is not NULL, the function set *encrypted to 1 if the