math/complex.h

   1 /* Copyright (C) 1997, 1998, 1999, 2000 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 /*
  20  *      ISO C99:  7.3 Complex arithmetic        <complex.h>
  21  */
  22
  23 #ifndef _COMPLEX_H
  24 #define _COMPLEX_H      1
  25
  26 #include <features.h>
  27
  28 /* Get general and ISO C99 specific information.  */
  29 #include <bits/mathdef.h>
  30
  31 __BEGIN_DECLS
  32
  33 /* We might need to add support for more compilers here.  But since ISO
  34    C99 is out hopefully all maintained compilers will soon provide the data
  35    types `float complex' and `double complex'.  */
  36 #if __GNUC_PREREQ (2, 7) && !__GNUC_PREREQ (2, 97)
  37 # define _Complex __complex__
  38 #endif
  39
  40 #define complex         _Complex
  41
  42 /* Narrowest imaginary unit.  This depends on the floating-point
  43    evaluation method.
  44    XXX This probably has to go into a gcc related file.  */
  45 #define _Complex_I      (__extension__ 1.0iF)
  46
  47 /* Another more descriptive name is `I'.
  48    XXX Once we have the imaginary support switch this to _Imaginary_I.  */
  49 #undef I
  50 #define I _Complex_I
  51
  52 /* The file <bits/cmathcalls.h> contains the prototypes for all the
  53    actual math functions.  These macros are used for those prototypes,
  54    so we can easily declare each function as both `name' and `__name',
  55    and can declare the float versions `namef' and `__namef'.  */
  56
  57 #define __MATHCALL(function, args)      \
  58   __MATHDECL (_Mdouble_complex_,function, args)
  59 #define __MATHDECL(type, function, args) \
  60   __MATHDECL_1(type, function, args); \
  61   __MATHDECL_1(type, __CONCAT(__,function), args)
  62 #define __MATHDECL_1(type, function, args) \
  63   extern type __MATH_PRECNAME(function) args __THROW
  64
  65 #define _Mdouble_               double
  66 #define __MATH_PRECNAME(name)   name
  67 #include <bits/cmathcalls.h>
  68 #undef  _Mdouble_
  69 #undef  __MATH_PRECNAME
  70
  71 /* Now the float versions.  */
  72 #ifndef _Mfloat_
  73 # define _Mfloat_               float
  74 #endif
  75 #define _Mdouble_               _Mfloat_
  76 #ifdef __STDC__
  77 # define __MATH_PRECNAME(name)  name##f
  78 #else
  79 # define __MATH_PRECNAME(name)  name/**/f
  80 #endif
  81 #include <bits/cmathcalls.h>
  82 #undef  _Mdouble_
  83 #undef  __MATH_PRECNAME
  84
  85 /* And the long double versions.  It is non-critical to define them
  86    here unconditionally since `long double' is required in ISO C99.  */
  87 #if __STDC__ - 0 || __GNUC__ - 0 && !defined __NO_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 */