1/* Copyright (C) 1997-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18/*
19 * ISO C99: 7.3 Complex arithmetic <complex.h>
20 */
21
22#ifndef _COMPLEX_H
23#define _COMPLEX_H 1
24
25#include <features.h>
26
27/* Get general and ISO C99 specific information. */
28#include <bits/mathdef.h>
29
30__BEGIN_DECLS
31
32/* We might need to add support for more compilers here. But since ISO
33 C99 is out hopefully all maintained compilers will soon provide the data
34 types `float complex' and `double complex'. */
35#if __GNUC_PREREQ (2, 7) && !__GNUC_PREREQ (2, 97)
36# define _Complex __complex__
37#endif
38
39#define complex _Complex
40
41/* Narrowest imaginary unit. This depends on the floating-point
42 evaluation method.
43 XXX This probably has to go into a gcc related file. */
44#define _Complex_I (__extension__ 1.0iF)
45
46/* Another more descriptive name is `I'.
47 XXX Once we have the imaginary support switch this to _Imaginary_I. */
48#undef I
49#define I _Complex_I
50
51#if defined __USE_ISOC11 && __GNUC_PREREQ (4, 7)
52/* Macros to expand into expression of specified complex type. */
53# define CMPLX(x, y) __builtin_complex ((double) (x), (double) (y))
54# define CMPLXF(x, y) __builtin_complex ((float) (x), (float) (y))
55# define CMPLXL(x, y) __builtin_complex ((long double) (x), (long double) (y))
56#endif
57
58/* The file <bits/cmathcalls.h> contains the prototypes for all the
59 actual math functions. These macros are used for those prototypes,
60 so we can easily declare each function as both `name' and `__name',
61 and can declare the float versions `namef' and `__namef'. */
62
63#define __MATHCALL(function, args) \
64 __MATHDECL (_Mdouble_complex_,function, args)
65#define __MATHDECL(type, function, args) \
66 __MATHDECL_1(type, function, args); \
67 __MATHDECL_1(type, __CONCAT(__,function), args)
68#define __MATHDECL_1(type, function, args) \
69 extern type __MATH_PRECNAME(function) args __THROW
70
71#define _Mdouble_ double
72#define __MATH_PRECNAME(name) name
73#include <bits/cmathcalls.h>
74#undef _Mdouble_
75#undef __MATH_PRECNAME
76
77/* Now the float versions. */
78#ifndef _Mfloat_
79# define _Mfloat_ float
80#endif
81#define _Mdouble_ _Mfloat_
82#define __MATH_PRECNAME(name) name##f
83#include <bits/cmathcalls.h>
84#undef _Mdouble_
85#undef __MATH_PRECNAME
86
87/* And the long double versions. It is non-critical to define them
88 here unconditionally since `long double' is required in ISO C99. */
89#if !(defined __NO_LONG_DOUBLE_MATH && defined _LIBC) \
90 || defined __LDBL_COMPAT
91# ifdef __LDBL_COMPAT
92# undef __MATHDECL_1
93# define __MATHDECL_1(type, function, args) \
94 extern type __REDIRECT_NTH(__MATH_PRECNAME(function), args, function)
95# endif
96
97# ifndef _Mlong_double_
98# define _Mlong_double_ long double
99# endif
100# define _Mdouble_ _Mlong_double_
101# define __MATH_PRECNAME(name) name##l
102# include <bits/cmathcalls.h>
103#endif
104#undef _Mdouble_
105#undef __MATH_PRECNAME
106#undef __MATHDECL_1
107#undef __MATHDECL
108#undef __MATHCALL
109
110__END_DECLS
111
112#endif /* complex.h */
113