fixdiv

fixdiv(3alleg4)                  Allegro manual                  fixdiv(3alleg4)



NAME
       fixdiv - Fixed point division. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>


       fixed fixdiv(fixed x, fixed y);

DESCRIPTION
       A fixed point value can be divided by an integer with the normal `/'
       operator. To divide two fixed point values, though, you must use this
       function. If a division by zero occurs, `errno' will be set and the
       maximum possible value will be returned, but `errno' is not cleared if
       the operation is successful. This means that if you are going to test for
       division by zero you should set `errno=0' before calling fixdiv().
       Example:

          fixed result;
          /* This will put 0.06060 `result'. */
          result = fixdiv(itofix(2), itofix(33));
          /* This will put 0 into `result'. */
          result = fixdiv(0, itofix(-30));
          /* Sets `errno' and puts -32768 into `result'. */
          result = fixdiv(itofix(-100), itofix(0));
          ASSERT(!errno); /* This will fail. */

RETURN VALUE
       Returns the result of dividing `x' by `y'. If `y' is zero, returns the
       maximum possible fixed point value and sets `errno' to ERANGE.


SEE ALSO
       fixadd(3alleg4), fixsub(3alleg4), fixmul(3alleg4), exfixed(3alleg4)



Allegro                           version 4.4.3                  fixdiv(3alleg4)