gcc/ada/gcc-interface/ada.h

   1 /****************************************************************************
   2  *                                                                          *
   3  *                         GNAT COMPILER COMPONENTS                         *
   4  *                                                                          *
   5  *                                  A D A                                   *
   6  *                                                                          *
   7  *                              C Header File                               *
   8  *                                                                          *
   9  *          Copyright (C) 1992-2009, Free Software Foundation, Inc.         *
  10  *                                                                          *
  11  * GNAT is free software;  you can  redistribute it  and/or modify it under *
  12  * terms of the  GNU General Public License as published  by the Free Soft- *
  13  * ware  Foundation;  either version 3,  or (at your option) any later ver- *
  14  * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
  15  * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
  16  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
  17  * for  more details.  You should have  received  a copy of the GNU General *
  18  * Public License  distributed  with GNAT;  see file  COPYING3.  If not see *
  19  * <http://www.gnu.org/licenses/>.                                          *
  20  *                                                                          *
  21  * GNAT was originally developed  by the GNAT team at  New York University. *
  22  * Extensive contributions were provided by Ada Core Technologies Inc.      *
  23  *                                                                          *
  24  ****************************************************************************/
  25
  26 /* This file contains some standard macros for performing Ada-like
  27    operations. These are used to aid in the translation of other headers. */
  28
  29 #ifndef GCC_ADA_H
  30 #define GCC_ADA_H
  31
  32 /* Inlined functions in header are preceded by INLINE, which is normally set
  33    to extern inline for GCC, but may be set to static for use in standard
  34    ANSI-C.  */
  35
  36 #ifndef INLINE
  37 #ifdef __GNUC__
  38 #define INLINE static inline
  39 #else
  40 #define INLINE static
  41 #endif
  42 #endif
  43
  44 /* Define a macro to concatenate two strings.  Write it for ANSI C and
  45    for traditional C.  */
  46
  47 #ifdef __STDC__
  48 #define CAT(A,B) A##B
  49 #else
  50 #define _ECHO(A) A
  51 #define CAT(A,B) ECHO(A)B
  52 #endif
  53
  54 /* The following macro definition simulates the effect of a declaration of
  55    a subtype, where the first two parameters give the name of the type and
  56    subtype, and the third and fourth parameters give the subtype range. The
  57    effect is to compile a typedef defining the subtype as a synonym for the
  58    type, together with two constants defining the end points.  */
  59
  60 #define SUBTYPE(SUBTYPE,TYPE,FIRST,LAST)        \
  61   typedef TYPE SUBTYPE;                         \
  62   enum { CAT (SUBTYPE,__First) = FIRST,         \
  63          CAT (SUBTYPE,__Last) = LAST };
  64
  65 /* The following definition provides the equivalent of the Ada IN operator,
  66    assuming that the subtype involved has been defined using the SUBTYPE
  67    macro defined above.  */
  68
  69 #define IN(VALUE,SUBTYPE) \
  70   (((VALUE) >= (SUBTYPE) CAT (SUBTYPE,__First)) \
  71    && ((VALUE) <= (SUBTYPE) CAT (SUBTYPE,__Last)))
  72
  73 #endif