From 5af2a793bc8cc1a41783515ded2aee98d7e50644 Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Fri, 8 Oct 2010 10:35:14 +0000
Subject: 	* libc/include/complex.h: New complex header. 	*
 libm/common/fdlibm.h: Added ifdef _COMPLEX_H. 	* libm/complex/*: New complex
 functions imported from NetBSD. 	* libm/Makefile.am: Added complex
 subdir. 	* libm/Makefile.in: Regenerate. 	* libm/configure.in:
 Added complex subdir. 	* libm/configure: Regenerate.

---
 newlib/libm/complex/cproj.c | 67 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 newlib/libm/complex/cproj.c

(limited to 'newlib/libm/complex/cproj.c')

diff --git a/newlib/libm/complex/cproj.c b/newlib/libm/complex/cproj.c
new file mode 100644
index 000000000..e46742e9e
--- /dev/null
+++ b/newlib/libm/complex/cproj.c
@@ -0,0 +1,67 @@
+/*	$NetBSD: cproj.c,v 1.3 2010/09/20 17:51:38 christos Exp $	*/
+
+/*-
+ * Copyright (c) 2010 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * imported and modified include for newlib 2010/10/03 
+ * Marco Atzeri <marco_atzeri@yahoo.it>
+ */
+
+#include <sys/cdefs.h>
+/*__RCSID("$NetBSD: cproj.c,v 1.3 2010/09/20 17:51:38 christos Exp $"); */
+
+#include <complex.h>
+#include <math.h>
+
+#include "../common/fdlibm.h"
+
+/*
+ * cproj(double complex z)
+ *
+ * These functions return the value of the projection (not stereographic!)
+ * onto the Riemann sphere.
+ *
+ * z projects to z, except that all complex infinities (even those with one
+ * infinite part and one NaN part) project to positive infinity on the real axis.
+ * If z has an infinite part, then cproj(z) shall be equivalent to:
+ *
+ * INFINITY + I * copysign(0.0, cimag(z))
+ */
+double complex
+cproj(double complex z)
+{
+	double_complex w = { .z = z };
+
+	if (isinf(creal(z) || isinf(cimag(z)))) {
+#ifdef __INFINITY
+		REAL_PART(w) = __INFINITY;
+#else
+		REAL_PART(w) = INFINITY;
+#endif
+		IMAG_PART(w) = copysign(0.0, cimag(z));
+	}
+
+	return (w.z);
+}
-- 
cgit v1.2.3