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+/* Copyright (C) 1997 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+/*
+ * ISO C 9X: 7.8 Complex arithmetic <complex.h>
+ */
+
+#ifndef _COMPLEX_H
+#define _COMPLEX_H 1
+
+/* We might need to add support for more compilers here. But once ISO
+ C 9X is out hopefully all maintained compilers will provide the data
+ types `float complex' and `double complex'. */
+#if (__GNUC__ == 2 && __GNUC_MINOR__ >= 7) || __GNUC__ > 2
+# define complex __complex__
+#endif
+
+
+/* Narrowest imaginary unit. This depends on the floating-point
+ evaluation method.
+ XXX This probably has to go into a gcc related file. */
+#define _Imaginary_I (DBL_EPSISON * 1.0i)
+
+/* Another more descriptive name is `I'. */
+#undef I
+#define I _Imaginary_I
+
+
+/* Optimization aids. This is not yet implemented in gcc and yonce it
+ is this will probably be available in a gcc header. */
+#define CX_LIMITED_RANGE_ON
+#define CX_LIMITED_RANGE_OFF
+#define CX_LIMITED_RANGE_DEFAULT
+
+
+/* The file <cmathcalls.h> contains the prototypes for all the actual
+ math functions. These macros are used for those prototypes, so
+ we can easily declare each function as both `name' and `__name',
+ and can declare the float versions `namef' and `__namef'. */
+
+#define __MATHCALL(function, args) \
+ __MATHDECL (_Mdouble_complex_,function, args)
+#define __MATHDECL(type, function, args) \
+ __MATHDECL_1(type, function, args); \
+ __MATHDECL_1(type, __CONCAT(__,function), args)
+#define __MATHDECL_1(type, function, args) \
+ extern type __MATH_PRECNAME(function) args
+
+#define _Mdouble_ double
+#define __MATH_PRECNAME(name) name
+#include <cmathcalls.h>
+#undef _Mdouble_
+#undef __MATH_PRECNAME
+
+/* Now the float versions. */
+#ifndef _Mfloat_
+#define _Mfloat_ float
+#endif
+#define _Mdouble_ _Mfloat_
+#ifdef __STDC__
+#define __MATH_PRECNAME(name) name##f
+#else
+#define __MATH_PRECNAME(name) name/**/f
+#endif
+#include <cmathcalls.h>
+#undef _Mdouble_
+#undef __MATH_PRECNAME
+
+/* And the long double versions. It is non-critical to define them
+ here unconditionally since `long double' is required in ISO C 9X. */
+#ifndef _Mlong_double_
+#define _Mlong_double_ long double
+#endif
+#define _Mdouble_ _Mlong_double_
+#ifdef __STDC__
+#define __MATH_PRECNAME(name) name##l
+#else
+#define __MATH_PRECNAME(name) name/**/l
+#endif
+#include <cmathcalls.h>
+#undef _Mdouble_
+#undef __MATH_PRECNAME
+#undef __MATHDECL_1
+#undef __MATHDECL
+#undef __MATHCALL
+
+#endif /* complex.h */