al_ftofix(3)

NAME
al_ftofix - Allegro 5 API

SYNOPSIS

        #include <allegro5/allegro.h>
        al_fixed al_ftofix(double x);

DESCRIPTION
Converts a floating point value to fixed point. Unlike al_itofix(3), this function clamps values which could overflow the type conversion, setting Allegro’s errno to ERANGE in the process if this happens.

Example:

        al_fixed number;
        number = al_itofix(-40000);
        assert(al_fixfloor(number) == -32768);
        number = al_itofix(64000);
        assert(al_fixfloor(number) == 32767);
        assert(!al_get_errno()); /* This will fail. */

RETURN VALUE
Returns the value of the floating point value converted to fixed point clamping overflows (and setting Allegro’s errno).

SEE ALSO
al_fixtof(3), al_itofix(3), al_fixtoi(3), al_get_errno(3)