* mingwex/complex/(cabsl.c cacosl.c cacoshl.c cargl.c casinl.c

casinhl.c catanl.c catanhl.c ccosl.c ccoshl.c cexpl.c cimagl.c
	clogl.c cpowl.c cprojl.c creall.c csinl.c csinhl.c csqrtl.c
	ctanl.c ctanhl.c): New files.
	* mingwex/Makefile.in (COMPLEX_DISTFILES): Adjust.
	(COMPLEX_OBJS): Adjust.
	* include/complex.h (cabsl, cacosl, cacoshl, cargl, casinf.
	casinhl, catanl, catanhl, ccosl, ccoshl, cexpl, cimagl, clogl,
	cpowl, cprojl, creall, csinl, csinhl, csqrtl, ctanl, ctanhl):
	Declare.

winsup/mingw/mingwex/complex/catanl.c

@@ -0,0 +1,53 @@
+/* catanl.c */
+
+/*
+   Contributed by Danny Smith
+   2005-01-04
+
+   FIXME: This needs some serious numerical analysis.
+*/
+
+#include <math.h>
+#include <complex.h>
+#include <errno.h>
+
+/* catan (z) = -I/2 * clog ((I + z) / (I - z)) */ 
+
+#ifndef _M_PI_2L
+#define _M_PI_2L 1.5707963267948966192313L
+#endif
+
+long double complex 
+catanl (long double complex Z)
+{
+  long double complex Res;
+  long double complex Tmp;
+  long double x = __real__ Z;
+  long double y = __imag__ Z;
+
+  if ( x == 0.0L && (1.0L - fabsl (y)) == 0.0L)
+    {
+      errno = ERANGE;
+      __real__ Res = HUGE_VALL;
+      __imag__ Res = HUGE_VALL;
+    }
+   else if (isinf (hypotl (x, y)))
+   {
+     __real__ Res = (x > 0 ? _M_PI_2L : -_M_PI_2L);
+     __imag__ Res = 0.0L;
+   }
+  else
+    {
+      __real__ Tmp = - x; 
+      __imag__ Tmp = 1.0L - y;
+
+      __real__ Res = x; 
+      __imag__ Res = y + 1.0L;
+
+      Tmp = clogl (Res/Tmp);	
+      __real__ Res  = - 0.5L * __imag__ Tmp;
+      __imag__ Res =  0.5L * __real__ Tmp;
+    }
+
+   return Res; 
+}