xml2: Use MSVC constants for NaN and infinity.

Prevent division by zero exceptions from being thrown, if they are enabled and calls to xmlXPathInit() are being made. Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=52003Signed-off-by: Bernhard Kölbl <besentv@gmail.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

xml2: Use MSVC constants for NaN and infinity.
8923be8f · Bernhard Kölbl · Alexandre Julliard · c6b5f4a4 · 8923be8f
Commit 8923be8f authored Nov 09, 2021 by Bernhard Kölbl Committed by Alexandre Julliard Nov 10, 2021
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xpath.c libs/xml2/xpath.c +4 -6

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--- a/libs/xml2/xpath.c
+++ b/libs/xml2/xpath.c
@@ -497,14 +497,12 @@ double xmlXPathNINF;
 *
 * Initialize the XPath environment
 */
-ATTRIBUTE_NO_SANITIZE("float-divide-by-zero")
 void
 xmlXPathInit(void) {
-    /* MSVC doesn't allow division by zero in constant expressions. */
-    double zero = 0.0;
-    xmlXPathNAN = 0.0 / zero;
-    xmlXPathPINF = 1.0 / zero;
-    xmlXPathNINF = -xmlXPathPINF;
+    /* Use MSVC definitions */
+    xmlXPathNAN = NAN;
+    xmlXPathPINF = INFINITY;
+    xmlXPathNINF = -INFINITY;
 }

 /**