ucrtbase: Add ilogb* functions.

configure

@@ -18698,6 +18698,8 @@ for ac_func in \
 	exp2f \
 	expm1 \
 	expm1f \
+	ilogb \
+	ilogbf \
 	j0 \
 	j1 \
 	jn \

configure.ac

@@ -2743,6 +2743,8 @@ AC_CHECK_FUNCS(\
 	exp2f \
 	expm1 \
 	expm1f \
+	ilogb \
+	ilogbf \
 	j0 \
 	j1 \
 	jn \

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

@@ -254,9 +254,9 @@
 @ cdecl -arch=arm,x86_64,arm64 fmodf(float float) ucrtbase.fmodf
 @ cdecl frexp(double ptr) ucrtbase.frexp
 @ cdecl hypot(double double) ucrtbase.hypot
-@ stub ilogb
-@ stub ilogbf
-@ stub ilogbl
+@ cdecl ilogb(double) ucrtbase.ilogb
+@ cdecl ilogbf(float) ucrtbase.ilogbf
+@ cdecl ilogbl(double) ucrtbase.ilogbl
 @ cdecl ldexp(double long) ucrtbase.ldexp
 @ cdecl lgamma(double) ucrtbase.lgamma
 @ cdecl lgammaf(float) ucrtbase.lgammaf

dlls/msvcr120/msvcr120.spec

@@ -2207,9 +2207,9 @@
 @ cdecl gets_s(ptr long) MSVCRT_gets_s
 @ cdecl getwc(ptr) MSVCRT_getwc
 @ cdecl getwchar() MSVCRT_getwchar
-@ stub ilogb
-@ stub ilogbf
-@ stub ilogbl
+@ cdecl ilogb(double) MSVCR120_ilogb
+@ cdecl ilogbf(float) MSVCR120_ilogbf
+@ cdecl ilogbl(double) MSVCR120_ilogbl
 @ stub imaxabs
 @ stub imaxdiv
 @ cdecl is_wctype(long long) ntdll.iswctype

dlls/msvcr120_app/msvcr120_app.spec

@@ -1871,9 +1871,9 @@
 @ cdecl gets_s(ptr long) msvcr120.gets_s
 @ cdecl getwc(ptr) msvcr120.getwc
 @ cdecl getwchar() msvcr120.getwchar
-@ stub ilogb
-@ stub ilogbf
-@ stub ilogbl
+@ cdecl ilogb(double) msvcr120.ilogb
+@ cdecl ilogbf(float) msvcr120.ilogbf
+@ cdecl ilogbl(double) msvcr120.ilogbl
 @ stub imaxabs
 @ stub imaxdiv
 @ cdecl isalnum(long) msvcr120.isalnum

dlls/msvcrt/math.c

@@ -3433,4 +3433,35 @@ double CDECL MSVCR120_creal(_Dcomplex z)
     return z.x;
 }
 
+int CDECL MSVCR120_ilogb(double x)
+{
+    if (!x) return MSVCRT_FP_ILOGB0;
+    if (isnan(x)) return MSVCRT_FP_ILOGBNAN;
+    if (isinf(x)) return MSVCRT_INT_MAX;
+
+#ifdef HAVE_ILOGB
+    return ilogb(x);
+#else
+    return logb(x);
+#endif
+}
+
+int CDECL MSVCR120_ilogbf(float x)
+{
+    if (!x) return MSVCRT_FP_ILOGB0;
+    if (isnan(x)) return MSVCRT_FP_ILOGBNAN;
+    if (isinf(x)) return MSVCRT_INT_MAX;
+
+#ifdef HAVE_ILOGBF
+    return ilogbf(x);
+#else
+    return logbf(x);
+#endif
+}
+
+int CDECL MSVCR120_ilogbl(LDOUBLE x)
+{
+    return MSVCR120_ilogb(x);
+}
+
 #endif /* _MSVCR_VER>=120 */

dlls/msvcrt/msvcrt.h

@@ -41,6 +41,7 @@
 #include "windef.h"
 #include "winbase.h"
 
+#define MSVCRT_INT_MAX     0x7fffffff
 #define MSVCRT_LONG_MAX    0x7fffffff
 #define MSVCRT_LONG_MIN    (-MSVCRT_LONG_MAX-1)
 #define MSVCRT_ULONG_MAX   0xffffffff
@@ -1187,6 +1188,9 @@ printf_arg arg_clbk_positional(void*, int, int, __ms_va_list*) DECLSPEC_HIDDEN;
 #define MSVCRT__OVERFLOW  3
 #define MSVCRT__UNDERFLOW 4
 
+#define MSVCRT_FP_ILOGB0 (-MSVCRT_INT_MAX - 1)
+#define MSVCRT_FP_ILOGBNAN MSVCRT_INT_MAX
+
 typedef struct
 {
     float f;

dlls/ucrtbase/ucrtbase.spec

@@ -2341,9 +2341,9 @@
 @ cdecl getwc(ptr) MSVCRT_getwc
 @ cdecl getwchar() MSVCRT_getwchar
 @ cdecl hypot(double double) _hypot
-@ stub ilogb
-@ stub ilogbf
-@ stub ilogbl
+@ cdecl ilogb(double) MSVCR120_ilogb
+@ cdecl ilogbf(float) MSVCR120_ilogbf
+@ cdecl ilogbl(double) MSVCR120_ilogbl
 @ stub imaxabs
 @ stub imaxdiv
 @ cdecl is_wctype(long long) ntdll.iswctype

include/config.h.in

@@ -303,6 +303,12 @@
 /* Define to 1 if you have the `if_nameindex' function. */
 #undef HAVE_IF_NAMEINDEX
 
+/* Define to 1 if you have the `ilogb' function. */
+#undef HAVE_ILOGB
+
+/* Define to 1 if you have the `ilogbf' function. */
+#undef HAVE_ILOGBF
+
 /* Define to 1 if you have the `inet_addr' function. */
 #undef HAVE_INET_ADDR