Welcome zend_finite(n).

This chooses the best combination of what is available:

finite, isfinite, isinf, isnan

Author: Sascha Schumann

Zend/Zend.m4

@@ -64,7 +64,9 @@ AC_FUNC_MEMCMP
 AC_FUNC_ALLOCA
 AC_CHECK_FUNCS(memcpy strdup getpid kill strtod strtol finite)
 AC_ZEND_BROKEN_SPRINTF
-	
+
+AC_CHECK_FUNCS(finite isfinite isinf isnan)
+
 AC_SUBST(ZEND_SCANNER)
 
 ])
@@ -95,9 +97,6 @@ AC_ARG_ENABLE(debug,
 
 
 
-
-
-
 AC_DEFUN(LIBZEND_OTHER_CHECKS,[
 
 AC_ARG_ENABLE(c9x-inline,

Zend/acconfig.h

@@ -35,6 +35,20 @@ int zend_sprintf(char *buffer, const char *format, ...);
 # define zend_sprintf sprintf
 #endif
 
+#ifdef HAVE_FINITE
+#define zend_finite(a) finite(a)
+#elif defined(HAVE_ISFINITE)
+#define zend_finite(a) isfinite(a)
+#elif defined(HAVE_ISNAN) && defined(HAVE_ISINF)
+#define zend_finite(a) (isnan(a) ? 0 : isinf(a) ? 0 : 1)
+#elif defined(HAVE_ISNAN)
+#define zend_finite(a) (isnan(a) ? 0 : 1)
+#elif defined(HAVE_ISINF)
+#define zend_finite(a) (isinf(a) ? 0 : 1)
+#else
+#define zend_finite(a) (1)
+#endif
+
 /*
  * Local variables:
  * tab-width: 4

Zend/zend_config.w32.h

@@ -63,7 +63,7 @@ typedef unsigned int uint;
 # define inline
 #endif
 
-#define finite(A) _finite(A)
+#define zend_finite(A) _finite(A)
 
 #ifdef LIBZEND_EXPORTS
 #	define ZEND_API __declspec(dllexport)

Zend/zend_operators.h

@@ -24,15 +24,9 @@
 #include <errno.h>
 #include <math.h>
 
-#ifndef HAVE_FINITE
-#ifndef finite  				/* in case it's already a macro */
-#define finite(a) isfinite(a)	/* HPUX 11 only has isfinite() */
-#endif
-#else
-#if HAVE_IEEEFP_H
+#ifdef HAVE_IEEEFP_H
 #include <ieeefp.h>
 #endif
-#endif
 
 #if WITH_BCMATH
 #include "ext/bcmath/number.h"
@@ -87,7 +81,7 @@ ZEND_API inline int is_numeric_string(char *str, int length, long *lval, double
 	errno=0;
 	local_dval = strtod(str, &end_ptr);
 	if (errno!=ERANGE && end_ptr == str+length) { /* floating point string */
-		if (! finite(local_dval)) {
+		if (! zend_finite(local_dval)) {
 			/* "inf","nan" and maybe other weird ones */
 			return 0;
 		}