lib/ansi/div.c

   1 /*
   2  * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
   3  * See the copyright notice in the ACK home directory, in the file "Copyright".
   4  */
   5 /* $Header$ */
   6
   7 #include        <stdlib.h>
   8
   9 static int tmp = -1;
  10
  11 div_t
  12 div(register int numer, register int denom)
  13 {
  14         div_t r;
  15
  16         /* The assignment of tmp should not be optimized !! */
  17         if (tmp == -1) {
  18                 tmp = (tmp / 2 == 0);
  19         }
  20         if (numer == 0) {
  21                 r.quot = numer / denom;         /* might trap if denom == 0 */
  22                 r.rem = numer % denom;
  23         } else if ( !tmp && ((numer < 0) != (denom < 0))) {
  24                 r.quot = (numer / denom) + 1;
  25                 r.rem = numer - (numer / denom + 1) * denom;
  26         } else {
  27                 r.quot = numer / denom;
  28                 r.rem = numer % denom;
  29         }
  30         return r;
  31 }