From: Ilia Alshanetsky <iliaa@php.net>
Date: Fri, 8 Aug 2003 23:42:10 +0000 (+0000)
Subject: MFH: Avoid a round() bug that occurs due to over optimization of C code by
X-Git-Tag: php-4.3.3RC4~79
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c2302046dd38ada576f764e98fc12801e7f3c440;p=php

MFH: Avoid a round() bug that occurs due to over optimization of C code by
gcc.
---

diff --git a/ext/standard/math.c b/ext/standard/math.c
index 137b228d96..1b93b6fd0f 100644
--- a/ext/standard/math.c
+++ b/ext/standard/math.c
@@ -32,6 +32,8 @@
 #define M_PI 3.14159265358979323846
 #endif
 
+#define PHP_ROUND_FUZZ 0.50000000001
+
 /* {{{ proto int abs(int number)
    Return the absolute value of the number */
 
@@ -143,9 +145,9 @@ PHP_FUNCTION(round)
 
 			return_val *= f;
 			if (return_val >= 0.0)
-				return_val = floor(return_val + 0.5);
+				return_val = floor(return_val + PHP_ROUND_FUZZ);
 			else
-				return_val = ceil(return_val - 0.5);
+				return_val = ceil(return_val - PHP_ROUND_FUZZ);
 			return_val /= f;
 
 			RETURN_DOUBLE(return_val);