From b0d27f9e857021edfaf5d373c5a15dedd262755e Mon Sep 17 00:00:00 2001
From: Marcus Boerger <helly@php.net>
Date: Mon, 10 May 2004 07:23:38 +0000
Subject: [PATCH] - Decouple NAN and INF

---
 ext/standard/basic_functions.c |  6 +++---
 ext/standard/config.m4         | 26 ++++++++++++++++++++++++--
 2 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/ext/standard/basic_functions.c b/ext/standard/basic_functions.c
index 3106022f3d..85ebe92bbd 100644
--- a/ext/standard/basic_functions.c
+++ b/ext/standard/basic_functions.c
@@ -957,7 +957,7 @@ static void basic_globals_dtor(php_basic_globals *basic_globals_p TSRMLS_DC)
 #define PHP_DOUBLE_INFINITY_HIGH       0x7ff00000
 #define PHP_DOUBLE_QUIET_NAN_HIGH      0xfff80000
 
-PHPAPI double php_get_nan()
+PHPAPI double php_get_nan(void)
 {
 #if HAVE_HUGE_VAL_NAN
 	return HUGE_VAL + -HUGE_VAL;
@@ -973,9 +973,9 @@ PHPAPI double php_get_nan()
 #endif
 }
 
-PHPAPI double php_get_inf()
+PHPAPI double php_get_inf(void)
 {
-#if HAVE_HUGE_VAL_NAN
+#if HAVE_HUGE_VAL_INF
 	return HUGE_VAL;
 #elif defined(__i386__) || defined(_X86_) || defined(ALPHA) || defined(_ALPHA) || defined(__alpha)
 	double val = 0.0;
diff --git a/ext/standard/config.m4 b/ext/standard/config.m4
index 82b5b0b2bb..7a8689d897 100644
--- a/ext/standard/config.m4
+++ b/ext/standard/config.m4
@@ -389,7 +389,7 @@ if test "$ac_cv_atof_accept_inf" = "yes"; then
   AC_DEFINE([HAVE_ATOF_ACCEPTS_INF], 1, [whether atof() accepts INF])
 fi
 
-AC_CACHE_CHECK(whether HUGE_VAL + -HUGEVAL == NAN, ac_cv_huge_val_nan,[
+AC_CACHE_CHECK(whether HUGE_VAL == INF, ac_cv_huge_val_inf,[
   AC_TRY_RUN([
 #include <math.h>
 #include <stdlib.h>
@@ -405,6 +405,28 @@ AC_CACHE_CHECK(whether HUGE_VAL + -HUGEVAL == NAN, ac_cv_huge_val_nan,[
 #define zend_isinf(a) 0
 #endif
 
+int main(int argc, char** argv)
+{
+	return zend_isinf(HUGE_VAL) ? 0 : 1;
+}
+  ],[
+      ac_cv_huge_val_inf=yes
+  ],[
+      ac_cv_huge_val_inf=no
+  ],[
+      ac_cv_huge_val_inf=yes
+  ])
+])
+dnl This is the most probable fallback so we assume yes in case of cross compile.
+if test "$ac_cv_huge_val_inf" = "yes"; then
+  AC_DEFINE([HAVE_HUGE_VAL_INF], 1, [whether HUGE_VAL == INF])
+fi
+
+AC_CACHE_CHECK(whether HUGE_VAL + -HUGEVAL == NAN, ac_cv_huge_val_nan,[
+  AC_TRY_RUN([
+#include <math.h>
+#include <stdlib.h>
+
 #ifdef HAVE_ISNAN
 #define zend_isnan(a) isnan(a)
 #elif defined(HAVE_FPCLASS)
@@ -419,7 +441,7 @@ int main(int argc, char** argv)
 	/* prevent bug #27830 */
 	return 1;
 #else
-	return zend_isinf(HUGE_VAL) && zend_isnan(HUGE_VAL + -HUGE_VAL) ? 0 : 1;
+	return zend_isnan(HUGE_VAL + -HUGE_VAL) ? 0 : 1;
 #endif
 }
   ],[
-- 
2.40.0