Vim tips and tricks Post: 302991540

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

Allegro 							   version 4.4.2						   ftofix(3alleg4)