al_ftofix3alleg5

Usage

Overview

Converts a floating point value to fixed point. Unlike al_itofix(3alleg5), 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).