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+/* Copyright (C) 1997, 1998, 1999, 2000 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/*
+ * ISO C99: 7.3 Complex arithmetic <complex.h>
+ */
+
+#ifndef _COMPLEX_H
+#define _COMPLEX_H 1
+
+#include <features.h>
+
+/* Get general and ISO C99 specific information. */
+#include <bits/mathdef.h>
+
+__BEGIN_DECLS
+
+/* We might need to add support for more compilers here. But since ISO
+ C99 is out hopefully all maintained compilers will soon provide the data
+ types `float complex' and `double complex'. */
+#if __GNUC_PREREQ (2, 7) && !__GNUC_PREREQ (2, 97)
+# define _Complex __complex__
+#endif
+
+#define complex _Complex
+
+/* Narrowest imaginary unit. This depends on the floating-point
+ evaluation method.
+ XXX This probably has to go into a gcc related file. */
+#define _Complex_I (__extension__ 1.0iF)
+
+/* Another more descriptive name is `I'.
+ XXX Once we have the imaginary support switch this to _Imaginary_I. */
+#undef I
+#define I _Complex_I
+
+/* The file <bits/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 __THROW
+
+#define _Mdouble_ double
+#define __MATH_PRECNAME(name) name
+#include <bits/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 <bits/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 C99. */
+#if __STDC__ - 0 || __GNUC__ - 0 && !defined __NO_LONG_DOUBLE_MATH
+# 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 <bits/cmathcalls.h>
+#endif
+#undef _Mdouble_
+#undef __MATH_PRECNAME
+#undef __MATHDECL_1
+#undef __MATHDECL
+#undef __MATHCALL
+
+__END_DECLS
+
+#endif /* complex.h */