X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/2238127283d703f38765f9b3f6a64f799d18e9e5..a64bfdfa5a90731b804c057f2bcc74a8ba02937c:/src/floatfns.c
diff --git a/src/floatfns.c b/src/floatfns.c
index e003f492fe..2011b4d942 100644
--- a/src/floatfns.c
+++ b/src/floatfns.c
@@ -53,10 +53,7 @@ along with GNU Emacs. If not, see . */
#include "lisp.h"
#include "syssignal.h"
-#if STDC_HEADERS
#include
-#endif
-
/* If IEEE_FLOATING_POINT isn't defined, default it from FLT_*. */
#ifndef IEEE_FLOATING_POINT
#if (FLT_RADIX == 2 && FLT_MANT_DIG == 24 \
@@ -74,7 +71,7 @@ along with GNU Emacs. If not, see . */
extern double logb (double);
#endif /* not HPUX and HAVE_LOGB and no logb macro */
-#if defined(DOMAIN) && defined(SING) && defined(OVERFLOW)
+#if defined (DOMAIN) && defined (SING) && defined (OVERFLOW)
/* If those are defined, then this is probably a `matherr' machine. */
# ifndef HAVE_MATHERR
# define HAVE_MATHERR
@@ -285,7 +282,9 @@ DEFUN ("tan", Ftan, Stan, 1, 1, 0,
return make_float (d);
}
-#if defined HAVE_ISNAN && defined HAVE_COPYSIGN
+#undef isnan
+#define isnan(x) ((x) != (x))
+
DEFUN ("isnan", Fisnan, Sisnan, 1, 1, 0,
doc: /* Return non nil iff argument X is a NaN. */)
(Lisp_Object x)
@@ -294,6 +293,7 @@ DEFUN ("isnan", Fisnan, Sisnan, 1, 1, 0,
return isnan (XFLOAT_DATA (x)) ? Qt : Qnil;
}
+#ifdef HAVE_COPYSIGN
DEFUN ("copysign", Fcopysign, Scopysign, 1, 2, 0,
doc: /* Copy sign of X2 to value of X1, and return the result.
Cause an error if X1 or X2 is not a float. */)
@@ -519,7 +519,7 @@ DEFUN ("expt", Fexpt, Sexpt, 2, 2, 0,
if (f1 == 0.0 && f2 == 0.0)
f1 = 1.0;
#ifdef FLOAT_CHECK_DOMAIN
- else if ((f1 == 0.0 && f2 < 0.0) || (f1 < 0 && f2 != floor(f2)))
+ else if ((f1 == 0.0 && f2 < 0.0) || (f1 < 0 && f2 != floor (f2)))
domain_error2 ("expt", arg1, arg2);
#endif
IN_FLOAT2 (f3 = pow (f1, f2), "expt", arg1, arg2);
@@ -1033,8 +1033,8 @@ syms_of_floatfns (void)
defsubr (&Scos);
defsubr (&Ssin);
defsubr (&Stan);
-#if defined HAVE_ISNAN && defined HAVE_COPYSIGN
defsubr (&Sisnan);
+#ifdef HAVE_COPYSIGN
defsubr (&Scopysign);
defsubr (&Sfrexp);
defsubr (&Sldexp);