ftofix

ftofix(3alleg4)                  Allegro manual                  ftofix(3alleg4)



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(3alleg4), itofix(3alleg4), fixtoi(3alleg4), exfixed(3alleg4),
       exrotscl(3alleg4), exspline(3alleg4), exupdate(3alleg4)



Allegro                           version 4.4.3                  ftofix(3alleg4)