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fixdiv(3)                       Allegro manual                       fixdiv(3)

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(3), fixsub(3), fixmul(3), exfixed(3)

Allegro                          version 4.4.2                       fixdiv(3)