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(emacs_rint): Define this,

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either as a function or as a macro for rint.
(Fround, Ffround): Use emacs_rint, not rint directly.
This commit is contained in:
Richard M. Stallman 1997-09-03 23:01:57 +00:00
parent be417b22ba
commit dca6c9144c
1 changed files with 10 additions and 6 deletions
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16
src/floatfns.c
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@ -25,7 +25,7 @@ Boston, MA 02111-1307, USA. */
Define HAVE_INVERSE_HYPERBOLIC if you have acosh, asinh, and atanh.
Define HAVE_CBRT if you have cbrt.
Define HAVE_RINT if you have rint.
Define HAVE_RINT if you have a working rint.
If you don't define these, then the appropriate routines will be simulated.
Define HAVE_MATHERR if on a system supporting the SysV matherr callback.
@ -826,9 +826,13 @@ round2 (i1, i2)
return q + (abs_r + (q & 1) <= abs_r1 ? 0 : (i2 ^ r) < 0 ? -1 : 1);
}
#ifndef HAVE_RINT
/* The code uses emacs_rint, so that it works to undefine HAVE_RINT
if `rint' exists but does not work right. */
#ifdef HAVE_RINT
#define emacs_rint rint
#else
static double
rint (d)
emacs_rint (d)
double d;
{
return floor (d + 0.5);
@ -866,7 +870,7 @@ With optional DIVISOR, return the nearest integer to ARG/DIVISOR.")
(arg, divisor)
Lisp_Object arg, divisor;
{
return rounding_driver (arg, divisor, rint, round2, "round");
return rounding_driver (arg, divisor, emacs_rint, round2, "round");
}
DEFUN ("truncate", Ftruncate, Struncate, 1, 2, 0,
@ -931,12 +935,12 @@ DEFUN ("fround", Ffround, Sfround, 1, 1, 0,
register Lisp_Object arg;
{
double d = extract_float (arg);
IN_FLOAT (d = rint (d), "fround", arg);
IN_FLOAT (d = emacs_rint (d), "fround", arg);
return make_float (d);
}
DEFUN ("ftruncate", Fftruncate, Sftruncate, 1, 1, 0,
"Truncate a floating point number to an integral float value.\n\
"Truncate a floating point number to an integral float value.\n\
Rounds the value toward zero.")
(arg)
register Lisp_Object arg;