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1/* Copyright (C) 1997-2017 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#define __GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION
26#include <bits/libc-header-start.h>
27
28/* Get general and ISO C99 specific information. */
29#include <bits/mathdef.h>
30
31/* Gather machine-dependent _FloatN type support. */
32#include <bits/floatn.h>
33
34__BEGIN_DECLS
35
36/* We might need to add support for more compilers here. But since ISO
37 C99 is out hopefully all maintained compilers will soon provide the data
38 types `float complex' and `double complex'. */
39#if __GNUC_PREREQ (2, 7) && !__GNUC_PREREQ (2, 97)
40# define _Complex __complex__
41#endif
42
43#define complex _Complex
44
45/* Narrowest imaginary unit. This depends on the floating-point
46 evaluation method.
47 XXX This probably has to go into a gcc related file. */
48#define _Complex_I (__extension__ 1.0iF)
49
50/* Another more descriptive name is `I'.
51 XXX Once we have the imaginary support switch this to _Imaginary_I. */
52#undef I
53#define I _Complex_I
54
55#if defined __USE_ISOC11 && __GNUC_PREREQ (4, 7)
56/* Macros to expand into expression of specified complex type. */
57# define CMPLX(x, y) __builtin_complex ((double) (x), (double) (y))
58# define CMPLXF(x, y) __builtin_complex ((float) (x), (float) (y))
59# define CMPLXL(x, y) __builtin_complex ((long double) (x), (long double) (y))
60#endif
61
62#if __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)
63# define CMPLXF128(x, y) __builtin_complex ((_Float128) (x), (_Float128) (y))
64#endif
65
66/* The file <bits/cmathcalls.h> contains the prototypes for all the
67 actual math functions. These macros are used for those prototypes,
68 so we can easily declare each function as both `name' and `__name',
69 and can declare the float versions `namef' and `__namef'. */
70
71#define __MATHCALL(function, args) \
72 __MATHDECL (_Mdouble_complex_,function, args)
73#define __MATHDECL(type, function, args) \
74 __MATHDECL_1(type, function, args); \
75 __MATHDECL_1(type, __CONCAT(__,function), args)
76#define __MATHDECL_1(type, function, args) \
77 extern type __MATH_PRECNAME(function) args __THROW
78
79#define _Mdouble_ double
80#define __MATH_PRECNAME(name) name
81#include <bits/cmathcalls.h>
82#undef _Mdouble_
83#undef __MATH_PRECNAME
84
85/* Now the float versions. */
86#ifndef _Mfloat_
87# define _Mfloat_ float
88#endif
89#define _Mdouble_ _Mfloat_
90#define __MATH_PRECNAME(name) name##f
91#include <bits/cmathcalls.h>
92#undef _Mdouble_
93#undef __MATH_PRECNAME
94
95#if (__HAVE_DISTINCT_FLOAT128 || (__HAVE_FLOAT128 && !defined _LIBC)) \
96 && __GLIBC_USE (IEC_60559_TYPES_EXT)
97# ifndef _Mfloat128_
98# define _Mfloat128_ _Float128
99# endif
100/* GCC < 7 requires extra convincing to expose a complex float128 type. */
101# ifdef __CFLOAT128
102# undef _Mdouble_complex_
103# define _Mdouble_complex_ __CFLOAT128
104# endif
105# define _Mdouble_ _Mfloat128_
106# define __MATH_PRECNAME(name) name##f128
107# include <bits/cmathcalls.h>
108# undef _Mdouble_
109# undef __MATH_PRECNAME
110# undef _Mdouble_complex_
111#endif
112
113/* And the long double versions. It is non-critical to define them
114 here unconditionally since `long double' is required in ISO C99. */
115#if !(defined __NO_LONG_DOUBLE_MATH && defined _LIBC) \
116 || defined __LDBL_COMPAT
117# ifdef __LDBL_COMPAT
118# undef __MATHDECL_1
119# define __MATHDECL_1(type, function, args) \
120 extern type __REDIRECT_NTH(__MATH_PRECNAME(function), args, function)
121# endif
122
123# ifndef _Mlong_double_
124# define _Mlong_double_ long double
125# endif
126# define _Mdouble_ _Mlong_double_
127# define __MATH_PRECNAME(name) name##l
128# include <bits/cmathcalls.h>
129#endif
130#undef _Mdouble_
131#undef __MATH_PRECNAME
132#undef __MATHDECL_1
133#undef __MATHDECL
134#undef __MATHCALL
135
136__END_DECLS
137
138#endif /* complex.h */
139

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