msvcrt: Implement nan.

dlls/api-ms-win-crt-math-l1-1-0/api-ms-win-crt-math-l1-1-0.spec

@@ -288,9 +288,9 @@
 @ cdecl lroundl(double) ucrtbase.lroundl
 @ cdecl modf(double ptr) ucrtbase.modf
 @ cdecl -arch=arm,x86_64 modff(float ptr) ucrtbase.modff
-@ stub nan
-@ stub nanf
-@ stub nanl
+@ cdecl nan(str) ucrtbase.nan
+@ cdecl nanf(str) ucrtbase.nanf
+@ cdecl nanl(str) ucrtbase.nanl
 @ cdecl nearbyint(double) ucrtbase.nearbyint
 @ cdecl nearbyintf(float) ucrtbase.nearbyintf
 @ cdecl nearbyintl(double) ucrtbase.nearbyintl

dlls/msvcr120/msvcr120.spec

@@ -2293,9 +2293,9 @@
 @ cdecl memset(ptr long long) MSVCRT_memset
 @ cdecl modf(double ptr) MSVCRT_modf
 @ cdecl -arch=arm,x86_64 modff(float ptr) MSVCRT_modff
-@ stub nan
-@ stub nanf
-@ stub nanl
+@ cdecl nan(str) MSVCR120_nan
+@ cdecl nanf(str) MSVCR120_nanf
+@ cdecl nanl(str) MSVCR120_nan
 @ cdecl nearbyint(double) MSVCRT_nearbyint
 @ cdecl nearbyintf(float) MSVCRT_nearbyintf
 @ cdecl nearbyintl(double) MSVCRT_nearbyint

dlls/msvcr120_app/msvcr120_app.spec

@@ -1956,9 +1956,9 @@
 @ cdecl memset(ptr long long) msvcr120.memset
 @ cdecl modf(double ptr) msvcr120.modf
 @ cdecl -arch=arm,x86_64 modff(float ptr) msvcr120.modff
-@ stub nan
-@ stub nanf
-@ stub nanl
+@ cdecl nan(str) msvcr120.nan
+@ cdecl nanf(str) msvcr120.nanf
+@ cdecl nanl(str) msvcr120.nanl
 @ cdecl nearbyint(double) msvcr120.nearbyint
 @ cdecl nearbyintf(float) msvcr120.nearbyintf
 @ cdecl nearbyintl(double) msvcr120.nearbyintl

dlls/msvcrt/math.c

@@ -2901,3 +2901,20 @@ LDOUBLE CDECL MSVCR120_lgammal(LDOUBLE x)
 {
     return MSVCR120_lgamma(x);
 }
+
+/*********************************************************************
+ *      nan (MSVCR120.@)
+ */
+double CDECL MSVCR120_nan(const char *tagp)
+{
+    /* Windows ignores input (MSDN) */
+    return NAN;
+}
+
+/*********************************************************************
+ *      nanf (MSVCR120.@)
+ */
+float CDECL MSVCR120_nanf(const char *tagp)
+{
+    return NAN;
+}

dlls/ucrtbase/ucrtbase.spec

@@ -2429,9 +2429,9 @@
 @ cdecl memset(ptr long long) MSVCRT_memset
 @ cdecl modf(double ptr) MSVCRT_modf
 @ cdecl -arch=arm,x86_64 modff(float ptr) MSVCRT_modff
-@ stub nan
-@ stub nanf
-@ stub nanl
+@ cdecl nan(str) MSVCR120_nan
+@ cdecl nanf(str) MSVCR120_nanf
+@ cdecl nanl(str) MSVCR120_nan
 @ cdecl nearbyint(double) MSVCRT_nearbyint
 @ cdecl nearbyintf(float) MSVCRT_nearbyintf
 @ cdecl nearbyintl(double) MSVCRT_nearbyint