ftofix man page on DragonFly

ftofix man page on DragonFly

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ftofix(3)			Allegro manual			     ftofix(3)

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, set‐
       ting `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), exrotscl(3), exspline(3),
       exupdate(3)

Allegro				 version 4.4.2			     ftofix(3)

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