ftofix

Section: Allegro manual (3)
Updated: version 4.2.2
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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)