include/complex.h

   1 /* Copyright (C) 1997, 1998, 1999, 2000, 2006 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 /* The file <bits/cmathcalls.h> contains the prototypes for all the
  52    actual math functions.  These macros are used for those prototypes,
  53    so we can easily declare each function as both `name' and `__name',
  54    and can declare the float versions `namef' and `__namef'.  */
  55
  56 #define __MATHCALL(function, args) \
  57         __MATHDECL(_Mdouble_complex_,function, args)
  58 #define __MATHDECL(type, function, args) \
  59         __MATHDECL_1(type, function, args); \
  60         __MATHDECL_1(type, __CONCAT(__,function), args)
  61 #define __MATHDECL_1(type, function, args) \
  62         extern type __MATH_PRECNAME(function) args __THROW
  63
  64 #define _Mdouble_               double
  65 #define __MATH_PRECNAME(name)   name
  66 #include <bits/cmathcalls.h>
  67 #undef  _Mdouble_
  68 #undef  __MATH_PRECNAME
  69
  70 /* Now the float versions.  */
  71 #ifndef _Mfloat_
  72 # define _Mfloat_               float
  73 #endif
  74 #define _Mdouble_               _Mfloat_
  75 #ifdef __STDC__
  76 # define __MATH_PRECNAME(name)  name##f
  77 #else
  78 # define __MATH_PRECNAME(name)  name/**/f
  79 #endif
  80 #include <bits/cmathcalls.h>
  81 #undef  _Mdouble_
  82 #undef  __MATH_PRECNAME
  83
  84 /* And the long double versions.  It is non-critical to define them
  85    here unconditionally since `long double' is required in ISO C99.  */
  86 #if (__STDC__ - 0 || __GNUC__ - 0) \
  87         && defined __UCLIBC_HAS_LONG_DOUBLE_MATH__
  88 # ifndef _Mlong_double_
  89 #  define _Mlong_double_        long double
  90 # endif
  91 # define _Mdouble_              _Mlong_double_
  92 # ifdef __STDC__
  93 #  define __MATH_PRECNAME(name) name##l
  94 # else
  95 #  define __MATH_PRECNAME(name) name/**/l
  96 # endif
  97 # include <bits/cmathcalls.h>
  98 #endif
  99 #undef  _Mdouble_
 100 #undef  __MATH_PRECNAME
 101 #undef  __MATHDECL_1
 102 #undef  __MATHDECL
 103 #undef  __MATHCALL
 104
 105 __END_DECLS
 106
 107 #endif /* complex.h */