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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 `/' opera- tor. 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 suc- cessful. 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 max- imum possible fixed point value and sets `errno' to ERANGE. SEE ALSO fixadd(3), fixsub(3), fixmul(3), exfixed(3) Allegro version 4.4.3 fixdiv(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO
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