ftofix(3) - Linux man page

Name

ftofix - Converts a floating point value to fixed point. Allegro game programming library.

Synopsis

#include <allegro.h>

fixed ftofix(double x);

Description

Converts a floating point value to fixed point. Unlike itofix(), this function clamps values which could overflow the type conversion, setting 'errno' to ERANGE in the process if this happens. Example: 
fixed number;
number = itofix(-40000);
ASSERT(fixfloor(number) == -32768);
number = itofix(64000);
ASSERT(fixfloor(number) == 32767);
ASSERT(!errno); /* This will fail. */

Return Value

Returns the value of the floating point value converted to fixed point clamping overflows (and setting 'errno').

See Also

fixtof(3), itofix(3), fixtoi(3), exfixed(3), exspline(3), exupdate(3)