math/complex.h

   1 /* Copyright (C) 1997 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 __BEGIN_DECLS
  29
  30 /* We might need to add support for more compilers here.  But once ISO
  31    C 9X is out hopefully all maintained compilers will provide the data
  32    types `float complex' and `double complex'.  */
  33 #if (__GNUC__ == 2 && __GNUC_MINOR__ >= 7) || __GNUC__ > 2
  34 # define complex __complex__
  35 #endif
  36
  37
  38 /* Narrowest imaginary unit.  This depends on the floating-point
  39    evaluation method.
  40    XXX This probably has to go into a gcc related file.  */
  41 #define _Complex_I      (1.0iF)
  42
  43 /* Another more descriptive name is `I'.
  44    XXX Once we have the imaginary support switch this to _Imaginary_I.  */
  45 #undef I
  46 #define I _Complex_I
  47
  48
  49 /* Optimization aids.  This is not yet implemented in gcc and once it
  50    is this will probably be available in a gcc header.  */
  51 #define CX_LIMITED_RANGE_ON
  52 #define CX_LIMITED_RANGE_OFF
  53 #define CX_LIMITED_RANGE_DEFAULT
  54
  55
  56 /* The file <bits/cmathcalls.h> contains the prototypes for all the
  57    actual math functions.  These macros are used for those prototypes,
  58    so we can easily declare each function as both `name' and `__name',
  59    and can declare the float versions `namef' and `__namef'.  */
  60
  61 #define __MATHCALL(function, args)      \
  62   __MATHDECL (_Mdouble_complex_,function, args)
  63 #define __MATHDECL(type, function, args) \
  64   __MATHDECL_1(type, function, args); \
  65   __MATHDECL_1(type, __CONCAT(__,function), args)
  66 #define __MATHDECL_1(type, function, args) \
  67   extern type __MATH_PRECNAME(function) args
  68
  69 #define _Mdouble_               double
  70 #define __MATH_PRECNAME(name)   name
  71 #include <bits/cmathcalls.h>
  72 #undef  _Mdouble_
  73 #undef  __MATH_PRECNAME
  74
  75 /* Now the float versions.  */
  76 #ifndef _Mfloat_
  77 #define _Mfloat_                float
  78 #endif
  79 #define _Mdouble_               _Mfloat_
  80 #ifdef __STDC__
  81 #define __MATH_PRECNAME(name)   name##f
  82 #else
  83 #define __MATH_PRECNAME(name)   name/**/f
  84 #endif
  85 #include <bits/cmathcalls.h>
  86 #undef  _Mdouble_
  87 #undef  __MATH_PRECNAME
  88
  89 /* And the long double versions.  It is non-critical to define them
  90    here unconditionally since `long double' is required in ISO C 9X.  */
  91 #ifndef _Mlong_double_
  92 #define _Mlong_double_          long double
  93 #endif
  94 #define _Mdouble_               _Mlong_double_
  95 #ifdef __STDC__
  96 #define __MATH_PRECNAME(name)   name##l
  97 #else
  98 #define __MATH_PRECNAME(name)   name/**/l
  99 #endif
 100 #include <bits/cmathcalls.h>
 101 #undef  _Mdouble_
 102 #undef  __MATH_PRECNAME
 103 #undef  __MATHDECL_1
 104 #undef  __MATHDECL
 105 #undef  __MATHCALL
 106
 107 __END_DECLS
 108
 109 #endif /* complex.h */