gcc/ada/ada.h

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT COMPILER COMPONENTS                         *
   4  *                                                                          *
   5  *                                  A D A                                   *
   6  *                                                                          *
   7  *                              C Header File                               *
   8  *                                                                          *
   9  *                                                                          *
  10  *          Copyright (C) 1992-2001 Free Software Foundation, Inc.          *
  11  *                                                                          *
  12  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  13  * terms of the  GNU General Public License as published  by the Free Soft- *
  14  * ware  Foundation;  either version 2,  or (at your option) any later ver- *
  15  * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
  16  * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
  17  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
  18  * for  more details.  You should have  received  a copy of the GNU General *
  19  * Public License  distributed with GNAT;  see file COPYING.  If not, write *
  20  * to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, *
  21  * MA 02111-1307, USA.                                                      *
  22  *                                                                          *
  23  * As a  special  exception,  if you  link  this file  with other  files to *
  24  * produce an executable,  this file does not by itself cause the resulting *
  25  * executable to be covered by the GNU General Public License. This except- *
  26  * ion does not  however invalidate  any other reasons  why the  executable *
  27  * file might be covered by the  GNU Public License.                        *
  28  *                                                                          *
  29  * GNAT was originally developed  by the GNAT team at  New York University. *
  30  * It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). *
  31  *                                                                          *
  32  ****************************************************************************/
  33
  34 /* This file contains some standard macros for performing Ada-like
  35    operations. These are used to aid in the translation of other headers. */
  36
  37 /* Inlined functions in header are preceded by INLINE, which is normally set
  38    to extern inline for GCC, but may be set to static for use in standard
  39    ANSI-C.  */
  40
  41 #ifndef INLINE
  42 #ifdef __GNUC__
  43 #define INLINE static inline
  44 #else
  45 #define INLINE static
  46 #endif
  47 #endif
  48
  49 /* Define a macro to concatenate two strings.  Write it for ANSI C and
  50    for traditional C.  */
  51
  52 #ifdef __STDC__
  53 #define CAT(A,B) A##B
  54 #else
  55 #define _ECHO(A) A
  56 #define CAT(A,B) ECHO(A)B
  57 #endif
  58
  59 /* The following macro definition simulates the effect of a declaration of
  60    a subtype, where the first two parameters give the name of the type and
  61    subtype, and the third and fourth parameters give the subtype range. The
  62    effect is to compile a typedef defining the subtype as a synonym for the
  63    type, together with two constants defining the end points.  */
  64
  65 #define SUBTYPE(SUBTYPE,TYPE,FIRST,LAST)    \
  66   typedef TYPE SUBTYPE;             \
  67   static const SUBTYPE CAT (SUBTYPE,__First) = FIRST; \
  68   static const SUBTYPE CAT (SUBTYPE,__Last) = LAST;
  69
  70 /* The following definitions provide the equivalent of the Ada IN and NOT IN
  71    operators, assuming that the subtype involved has been defined using the
  72    SUBTYPE macro defined above.  */
  73
  74 #define IN(VALUE,SUBTYPE) \
  75   (((VALUE) >= CAT (SUBTYPE,__First)) && ((VALUE) <= CAT (SUBTYPE,__Last)))