scc

simple c99 compiler
git clone git://git.simple-cc.org/scc
Log | Files | Refs | Submodules | README | LICENSE

rand.c (331B)

      1 #include <stdlib.h>
      2 
      3 #undef srand
      4 #undef rand
      5 
      6 static unsigned long next;
      7 
      8 void
      9 srand(unsigned seed)
     10 {
     11 	next = seed;
     12 }
     13 
     14 int
     15 rand(void)
     16 {
     17 	/*
     18 	 * next is just an arbitrary number
     19 	 * used to generate a random number
     20 	 * which is <= RAND_MAX
     21 	 */
     22 	next = next * 1103515245 + 12345;
     23 	return (unsigned)(next/65536) % (RAND_MAX + 1);
     24 }