mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-11 03:52:59 +00:00
39 lines
684 B
C
39 lines
684 B
C
|
|
/* @(#)z_ceil.c 1.0 98/08/13 */
|
|
/*****************************************************************
|
|
* ceil
|
|
*
|
|
* Input:
|
|
* x - floating point value
|
|
*
|
|
* Output:
|
|
* Smallest integer greater than x.
|
|
*
|
|
* Description:
|
|
* This routine returns the smallest integer greater than x.
|
|
*
|
|
*****************************************************************/
|
|
|
|
#include "fdlibm.h"
|
|
#include "zmath.h"
|
|
|
|
#ifndef _DOUBLE_IS_32BITS
|
|
|
|
double
|
|
_DEFUN (ceil, (double),
|
|
double x)
|
|
{
|
|
double f, y;
|
|
|
|
y = modf (x, &f);
|
|
|
|
if (y == 0.0)
|
|
return (x);
|
|
else if (x > -1.0 && x < 1.0)
|
|
return (x > 0 ? 1.0 : 0.0);
|
|
else
|
|
return (x > 0 ? f + 1.0 : f);
|
|
}
|
|
|
|
#endif /* _DOUBLE_IS_32BITS */
|