[pschweitzer] 54447: [CRT] Check for NaN and set error accordingly

Author: pschweitzer
Date: Sat Nov 19 19:01:58 2011
New Revision: 54447

URL: http://svn.reactos.org/svn/reactos?rev=54447&view=rev
Log:
[CRT]
Check for NaN and set error accordingly

Modified:
    trunk/reactos/lib/sdk/crt/math/i386/ldexp.c

Modified: trunk/reactos/lib/sdk/crt/math/i386/ldexp.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/lib/sdk/crt/math/i386/ldexp...
==============================================================================
--- trunk/reactos/lib/sdk/crt/math/i386/ldexp.c [iso-8859-1] (original)
+++ trunk/reactos/lib/sdk/crt/math/i386/ldexp.c [iso-8859-1] Sat Nov 19 19:01:58 2011
@@ -19,11 +19,22 @@
    Boston, MA 02110-1301, USA.
 */

+#include <precomp.h>
 #include <math.h>
+#include <float.h>

double ldexp (double value, int exp)
 {
     register double result;
+
+    /* Check for value correctness
+     * and set errno if required
+     */
+    if (_isnan(value))
+    {
+        errno = EDOM;
+    }
+
 #ifdef __GNUC__
 #if defined(__clang__)
     asm ("fild %[exp]\n"
@@ -33,20 +44,20 @@
          : [value] "0" (value), [exp] "m" (exp));
 #else
     asm ("fscale"
-        : "=t" (result)
+         : "=t" (result)
          : "0" (value), "u" ((double)exp)
          : "1");
 #endif
 #else /* !__GNUC__ */
-  register double __dy = (double)exp;
-  __asm
-  {
-    fld __dy
-    fld value
-    fscale
-    fstp result
-  }
+    register double __dy = (double)exp;
+    __asm
+    {
+        fld __dy
+        fld value
+        fscale
+        fstp result
+    }
 #endif /* !__GNUC__ */
-  return result;
+    return result;
 }