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 --          Copyright (C) 1992-2005, 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 2,  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 COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 package body Interfaces.Fortran is
  35
  36    ------------
  37    -- To_Ada --
  38    ------------
  39
  40    --  Single character case
  41
  42    function To_Ada (Item : Character_Set) return Character is
  43    begin
  44       return Character (Item);
  45    end To_Ada;
  46
  47    --  String case (function returning converted result)
  48
  49    function To_Ada (Item : Fortran_Character) return String is
  50       T : String (1 .. Item'Length);
  51
  52    begin
  53       for J in T'Range loop
  54          T (J) := Character (Item (J - 1 + Item'First));
  55       end loop;
  56
  57       return T;
  58    end To_Ada;
  59
  60    --  String case (procedure copying converted string to given buffer)
  61
  62    procedure To_Ada
  63      (Item   : Fortran_Character;
  64       Target : out String;
  65       Last   : out Natural)
  66    is
  67    begin
  68       if Item'Length = 0 then
  69          Last := 0;
  70          return;
  71
  72       elsif Target'Length = 0 then
  73          raise Constraint_Error;
  74
  75       else
  76          Last := Target'First - 1;
  77
  78          for J in Item'Range loop
  79             Last := Last + 1;
  80
  81             if Last > Target'Last then
  82                raise Constraint_Error;
  83             else
  84                Target (Last) := Character (Item (J));
  85             end if;
  86          end loop;
  87       end if;
  88    end To_Ada;
  89
  90    ----------------
  91    -- To_Fortran --
  92    ----------------
  93
  94    --  Character case
  95
  96    function To_Fortran (Item : Character) return Character_Set is
  97    begin
  98       return Character_Set (Item);
  99    end To_Fortran;
 100
 101    --  String case (function returning converted result)
 102
 103    function To_Fortran (Item : String) return Fortran_Character is
 104       T : Fortran_Character (1 .. Item'Length);
 105
 106    begin
 107       for J in T'Range loop
 108          T (J) := Character_Set (Item (J - 1 + Item'First));
 109       end loop;
 110
 111       return T;
 112    end To_Fortran;
 113
 114    --  String case (procedure copying converted string to given buffer)
 115
 116    procedure To_Fortran
 117      (Item   : String;
 118       Target : out Fortran_Character;
 119       Last   : out Natural)
 120    is
 121    begin
 122       if Item'Length = 0 then
 123          Last := 0;
 124          return;
 125
 126       elsif Target'Length = 0 then
 127          raise Constraint_Error;
 128
 129       else
 130          Last := Target'First - 1;
 131
 132          for J in Item'Range loop
 133             Last := Last + 1;
 134
 135             if Last > Target'Last then
 136                raise Constraint_Error;
 137             else
 138                Target (Last) := Character_Set (Item (J));
 139             end if;
 140          end loop;
 141       end if;
 142    end To_Fortran;
 143
 144 end Interfaces.Fortran;