gcc/ada/i-fortra.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                   I N T E R F A C E S . F O R T R A N                    --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --                            $Revision: 1.6 $                              --
  10 --                                                                          --
  11 --        Copyright (C) 1992,1993,1994 Free Software Foundation, Inc.       --
  12 --                                                                          --
  13 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  14 -- terms of the  GNU General Public License as published  by the Free Soft- --
  15 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  16 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  17 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  18 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  19 -- for  more details.  You should have  received  a copy of the GNU General --
  20 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  21 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  22 -- MA 02111-1307, USA.                                                      --
  23 --                                                                          --
  24 -- As a special exception,  if other files  instantiate  generics from this --
  25 -- unit, or you link  this unit with other files  to produce an executable, --
  26 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  27 -- covered  by the  GNU  General  Public  License.  This exception does not --
  28 -- however invalidate  any other reasons why  the executable file  might be --
  29 -- covered by the  GNU Public License.                                      --
  30 --                                                                          --
  31 -- GNAT was originally developed  by the GNAT team at  New York University. --
  32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 package body Interfaces.Fortran is
  37
  38    ------------
  39    -- To_Ada --
  40    ------------
  41
  42    --  Single character case
  43
  44    function To_Ada (Item : in Character_Set) return Character is
  45    begin
  46       return Character (Item);
  47    end To_Ada;
  48
  49    --  String case (function returning converted result)
  50
  51    function To_Ada (Item : in Fortran_Character) return String is
  52       T : String (1 .. Item'Length);
  53
  54    begin
  55       for J in T'Range loop
  56          T (J) := Character (Item (J - 1 + Item'First));
  57       end loop;
  58
  59       return T;
  60    end To_Ada;
  61
  62    --  String case (procedure copying converted string to given buffer)
  63
  64    procedure To_Ada
  65      (Item   : in Fortran_Character;
  66       Target : out String;
  67       Last   : out Natural)
  68    is
  69    begin
  70       if Item'Length = 0 then
  71          Last := 0;
  72          return;
  73
  74       elsif Target'Length = 0 then
  75          raise Constraint_Error;
  76
  77       else
  78          Last := Target'First - 1;
  79
  80          for J in Item'Range loop
  81             Last := Last + 1;
  82
  83             if Last > Target'Last then
  84                raise Constraint_Error;
  85             else
  86                Target (Last) := Character (Item (J));
  87             end if;
  88          end loop;
  89       end if;
  90    end To_Ada;
  91
  92    ----------------
  93    -- To_Fortran --
  94    ----------------
  95
  96    --  Character case
  97
  98    function To_Fortran (Item : in Character) return Character_Set is
  99    begin
 100       return Character_Set (Item);
 101    end To_Fortran;
 102
 103    --  String case (function returning converted result)
 104
 105    function To_Fortran (Item : in String) return Fortran_Character is
 106       T : Fortran_Character (1 .. Item'Length);
 107
 108    begin
 109       for J in T'Range loop
 110          T (J) := Character_Set (Item (J - 1 + Item'First));
 111       end loop;
 112
 113       return T;
 114    end To_Fortran;
 115
 116    --  String case (procedure copying converted string to given buffer)
 117
 118    procedure To_Fortran
 119      (Item   : in String;
 120       Target : out Fortran_Character;
 121       Last   : out Natural)
 122    is
 123    begin
 124       if Item'Length = 0 then
 125          Last := 0;
 126          return;
 127
 128       elsif Target'Length = 0 then
 129          raise Constraint_Error;
 130
 131       else
 132          Last := Target'First - 1;
 133
 134          for J in Item'Range loop
 135             Last := Last + 1;
 136
 137             if Last > Target'Last then
 138                raise Constraint_Error;
 139             else
 140                Target (Last) := Character_Set (Item (J));
 141             end if;
 142          end loop;
 143       end if;
 144    end To_Fortran;
 145
 146 end Interfaces.Fortran;