msvcrt: Implement the tgamma functions.

configure

@@ -19289,6 +19289,8 @@ for ac_func in \
 	rintf \
 	round \
 	roundf \
+	tgamma \
+	tgammaf \
 	trunc \
 	truncf \
 	y0 \

configure.ac

@@ -2676,6 +2676,8 @@ AC_CHECK_FUNCS(\
 	rintf \
 	round \
 	roundf \
+	tgamma \
+	tgammaf \
 	trunc \
 	truncf \
 	y0 \

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

@@ -333,9 +333,9 @@
 @ cdecl -arch=arm,x86_64,arm64 tanf(float) ucrtbase.tanf
 @ cdecl tanh(double) ucrtbase.tanh
 @ cdecl -arch=arm,x86_64,arm64 tanhf(float) ucrtbase.tanhf
-@ stub tgamma
-@ stub tgammaf
-@ stub tgammal
+@ cdecl tgamma(double) ucrtbase.tgamma
+@ cdecl tgammaf(float) ucrtbase.tgammaf
+@ cdecl tgammal(double) ucrtbase.tgammal
 @ cdecl trunc(double) ucrtbase.trunc
 @ cdecl truncf(float) ucrtbase.truncf
 @ cdecl truncl(double) ucrtbase.truncl

dlls/msvcr120/msvcr120.spec

@@ -2405,9 +2405,9 @@
 @ cdecl -arch=arm,x86_64,arm64 tanf(float) MSVCRT_tanf
 @ cdecl tanh(double) MSVCRT_tanh
 @ cdecl -arch=arm,x86_64,arm64 tanhf(float) MSVCRT_tanhf
-@ stub tgamma
-@ stub tgammaf
-@ stub tgammal
+@ cdecl tgamma(double) MSVCR120_tgamma
+@ cdecl tgammaf(float) MSVCR120_tgammaf
+@ cdecl tgammal(double) MSVCR120_tgamma
 @ cdecl tmpfile() MSVCRT_tmpfile
 @ cdecl tmpfile_s(ptr) MSVCRT_tmpfile_s
 @ cdecl tmpnam(ptr) MSVCRT_tmpnam

dlls/msvcr120_app/msvcr120_app.spec

@@ -2067,9 +2067,9 @@
 @ cdecl -arch=arm,x86_64,arm64 tanf(float) msvcr120.tanf
 @ cdecl tanh(double) msvcr120.tanh
 @ cdecl -arch=arm,x86_64,arm64 tanhf(float) msvcr120.tanhf
-@ stub tgamma
-@ stub tgammaf
-@ stub tgammal
+@ cdecl tgamma(double) msvcr120.tgamma
+@ cdecl tgammaf(float) msvcr120.tgammaf
+@ cdecl tgammal(double) msvcr120.tgammal
 @ cdecl tmpfile() msvcr120.tmpfile
 @ cdecl tmpfile_s(ptr) msvcr120.tmpfile_s
 @ cdecl tmpnam(ptr) msvcr120.tmpnam

dlls/msvcrt/math.c

@@ -3405,6 +3405,44 @@ LDOUBLE CDECL MSVCR120_lgammal(LDOUBLE x)
 }
 
 /*********************************************************************
+ *      tgamma (MSVCR120.@)
+ */
+double CDECL MSVCR120_tgamma(double x)
+{
+#ifdef HAVE_TGAMMA
+    if(x==0.0) *MSVCRT__errno() = MSVCRT_ERANGE;
+    if(x<0.0f) {
+      double integral;
+      if (modf(x, &integral) == 0)
+        *MSVCRT__errno() = MSVCRT_EDOM;
+    }
+    return tgamma(x);
+#else
+    FIXME( "not implemented\n" );
+    return 0.0;
+#endif
+}
+
+/*********************************************************************
+ *      tgammaf (MSVCR120.@)
+ */
+float CDECL MSVCR120_tgammaf(float x)
+{
+#ifdef HAVE_TGAMMAF
+    if(x==0.0f) *MSVCRT__errno() = MSVCRT_ERANGE;
+    if(x<0.0f) {
+      float integral;
+      if (modff(x, &integral) == 0)
+        *MSVCRT__errno() = MSVCRT_EDOM;
+    }
+    return tgammaf(x);
+#else
+    FIXME( "not implemented\n" );
+    return 0.0f;
+#endif
+}
+
+/*********************************************************************
  *      nan (MSVCR120.@)
  */
 double CDECL MSVCR120_nan(const char *tagp)

dlls/ucrtbase/ucrtbase.spec

@@ -2534,9 +2534,9 @@
 @ cdecl tanh(double) MSVCRT_tanh
 @ cdecl -arch=arm,x86_64,arm64 tanhf(float) MSVCRT_tanhf
 @ cdecl terminate() MSVCRT_terminate
-@ stub tgamma
-@ stub tgammaf
-@ stub tgammal
+@ cdecl tgamma(double) MSVCR120_tgamma
+@ cdecl tgammaf(float) MSVCR120_tgammaf
+@ cdecl tgammal(double) MSVCR120_tgamma
 @ cdecl tmpfile() MSVCRT_tmpfile
 @ cdecl tmpfile_s(ptr) MSVCRT_tmpfile_s
 @ cdecl tmpnam(ptr) MSVCRT_tmpnam

include/config.h.in

@@ -1166,6 +1166,12 @@
 /* Define to 1 if you have the <termios.h> header file. */
 #undef HAVE_TERMIOS_H
 
+/* Define to 1 if you have the `tgamma' function. */
+#undef HAVE_TGAMMA
+
+/* Define to 1 if you have the `tgammaf' function. */
+#undef HAVE_TGAMMAF
+
 /* Define to 1 if you have the `thr_kill2' function. */
 #undef HAVE_THR_KILL2