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 /* We might need to add support for more compilers here.  But once ISO
  27    C 9X is out hopefully all maintained compilers will provide the data
  28    types `float complex' and `double complex'.  */
  29 #if (__GNUC__ == 2 && __GNUC_MINOR__ >= 7) || __GNUC__ > 2
  30 # define complex __complex__
  31 #endif
  32
  33
  34 /* Narrowest imaginary unit.  This depends on the floating-point
  35    evaluation method.
  36    XXX This probably has to go into a gcc related file.  */
  37 #define _Imaginary_I    (DBL_EPSISON * 1.0i)
  38
  39 /* Another more descriptive name is `I'.  */
  40 #undef I
  41 #define I _Imaginary_I
  42
  43
  44 /* Optimization aids.  This is not yet implemented in gcc and yonce it
  45    is this will probably be available in a gcc header.  */
  46 #define CX_LIMITED_RANGE_ON
  47 #define CX_LIMITED_RANGE_OFF
  48 #define CX_LIMITED_RANGE_DEFAULT
  49
  50
  51 /* The file <cmathcalls.h> contains the prototypes for all the actual
  52    math functions.  These macros are used for those prototypes, so
  53    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
  63
  64 #define _Mdouble_               double
  65 #define __MATH_PRECNAME(name)   name
  66 #include <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 <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 C 9X.  */
  86 #ifndef _Mlong_double_
  87 #define _Mlong_double_          long double
  88 #endif
  89 #define _Mdouble_               _Mlong_double_
  90 #ifdef __STDC__
  91 #define __MATH_PRECNAME(name)   name##l
  92 #else
  93 #define __MATH_PRECNAME(name)   name/**/l
  94 #endif
  95 #include <cmathcalls.h>
  96 #undef  _Mdouble_
  97 #undef  __MATH_PRECNAME
  98 #undef  __MATHDECL_1
  99 #undef  __MATHDECL
 100 #undef  __MATHCALL
 101
 102 #endif /* complex.h */