Simplify by assuming C99 math.h isnan etc.

These should be portable nowadays.
* src/data.c (isnan): Remove.
* src/floatfns.c (isfinite, isnan): Remove.
* src/print.c: Include math.h, for isinf and isnan.
(float_to_string): Simplify by using them.

1 files changed, 0 insertions, 7 deletions

diff --git a/src/floatfns.c b/src/floatfns.c
index e7d404a84e0..45e786f9669 100644
--- a/src/floatfns.c
+++ b/src/floatfns.c
@@ -47,13 +47,6 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 
 #include <count-leading-zeros.h>
 
-#ifndef isfinite
-# define isfinite(x) ((x) - (x) == 0)
-#endif
-#ifndef isnan
-# define isnan(x) ((x) != (x))
-#endif
-
 /* Check that X is a floating point number.  */
 
 static void