msvcrt: Add signbit definition

Zheng Chen chanchengcc at gmail.com
Sun Mar 22 13:14:49 CDT 2015


- Add signbit definition

Thanks for Piotr's advice.

---
 dlls/msvcrt/math.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/msvcrt/math.c b/dlls/msvcrt/math.c
index 155de47..ea5b4e4 100644
--- a/dlls/msvcrt/math.c
+++ b/dlls/msvcrt/math.c
@@ -46,8 +46,9 @@ WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
 #endif
 #endif

+/* FIXME: Doesnot work with +-NAN and -0. */
 #ifndef signbit
-#define signbit(x) 0
+#define signbit(x) ((x) < 0 ? 1 : 0)
 #endif

 typedef int (CDECL *MSVCRT_matherr_func)(struct MSVCRT__exception *);
-- 
2.3.3
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