math/complex.h

   1 /* Copyright (C) 1997, 1998 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 /*
  20  *      ISO C 9X:  7.8 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 C 9X specific information.  */
  29 #include <bits/mathdef.h>
  30
  31 __BEGIN_DECLS
  32
  33 /* We might need to add support for more compilers here.  But once ISO
  34    C 9X is out hopefully all maintained compilers will provide the data
  35    types `float complex' and `double complex'.  */
  36 #if (__GNUC__ == 2 && __GNUC_MINOR__ >= 7) || __GNUC__ > 2
  37 # define _Complex __complex__
  38 #endif
  39
  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      (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
  52 /* Optimization aids.  This is not yet implemented in gcc and once it
  53    is this will probably be available in a gcc header.  */
  54 #define CX_LIMITED_RANGE_ON
  55 #define CX_LIMITED_RANGE_OFF
  56 #define CX_LIMITED_RANGE_DEFAULT
  57
  58
  59 /* The file <bits/cmathcalls.h> contains the prototypes for all the
  60    actual math functions.  These macros are used for those prototypes,
  61    so we can easily declare each function as both `name' and `__name',
  62    and can declare the float versions `namef' and `__namef'.  */
  63
  64 #define __MATHCALL(function, args)      \
  65   __MATHDECL (_Mdouble_complex_,function, args)
  66 #define __MATHDECL(type, function, args) \
  67   __MATHDECL_1(type, function, args); \
  68   __MATHDECL_1(type, __CONCAT(__,function), args)
  69 #define __MATHDECL_1(type, function, args) \
  70   extern type __MATH_PRECNAME(function) args
  71
  72 #define _Mdouble_               double
  73 #define __MATH_PRECNAME(name)   name
  74 #include <bits/cmathcalls.h>
  75 #undef  _Mdouble_
  76 #undef  __MATH_PRECNAME
  77
  78 /* Now the float versions.  */
  79 #ifndef _Mfloat_
  80 # define _Mfloat_               float
  81 #endif
  82 #define _Mdouble_               _Mfloat_
  83 #ifdef __STDC__
  84 # define __MATH_PRECNAME(name)  name##f
  85 #else
  86 # define __MATH_PRECNAME(name)  name/**/f
  87 #endif
  88 #include <bits/cmathcalls.h>
  89 #undef  _Mdouble_
  90 #undef  __MATH_PRECNAME
  91
  92 /* And the long double versions.  It is non-critical to define them
  93    here unconditionally since `long double' is required in ISO C 9X.  */
  94 #if __STDC__ - 0 || __GNUC__ - 0 && !defined __NO_LONG_DOUBLE_MATH
  95 # ifndef _Mlong_double_
  96 #  define _Mlong_double_        long double
  97 # endif
  98 # define _Mdouble_              _Mlong_double_
  99 # ifdef __STDC__
 100 #  define __MATH_PRECNAME(name) name##l
 101 # else
 102 #  define __MATH_PRECNAME(name) name/**/l
 103 # endif
 104 # include <bits/cmathcalls.h>
 105 #endif
 106 #undef  _Mdouble_
 107 #undef  __MATH_PRECNAME
 108 #undef  __MATHDECL_1
 109 #undef  __MATHDECL
 110 #undef  __MATHCALL
 111
 112 __END_DECLS
 113
 114 #endif /* complex.h */