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) 1992-2009, 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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 package body Interfaces.Fortran is
  33
  34    ------------
  35    -- To_Ada --
  36    ------------
  37
  38    --  Single character case
  39
  40    function To_Ada (Item : Character_Set) return Character is
  41    begin
  42       return Character (Item);
  43    end To_Ada;
  44
  45    --  String case (function returning converted result)
  46
  47    function To_Ada (Item : Fortran_Character) return String is
  48       T : String (1 .. Item'Length);
  49
  50    begin
  51       for J in T'Range loop
  52          T (J) := Character (Item (J - 1 + Item'First));
  53       end loop;
  54
  55       return T;
  56    end To_Ada;
  57
  58    --  String case (procedure copying converted string to given buffer)
  59
  60    procedure To_Ada
  61      (Item   : Fortran_Character;
  62       Target : out String;
  63       Last   : out Natural)
  64    is
  65    begin
  66       if Item'Length = 0 then
  67          Last := 0;
  68          return;
  69
  70       elsif Target'Length = 0 then
  71          raise Constraint_Error;
  72
  73       else
  74          Last := Target'First - 1;
  75
  76          for J in Item'Range loop
  77             Last := Last + 1;
  78
  79             if Last > Target'Last then
  80                raise Constraint_Error;
  81             else
  82                Target (Last) := Character (Item (J));
  83             end if;
  84          end loop;
  85       end if;
  86    end To_Ada;
  87
  88    ----------------
  89    -- To_Fortran --
  90    ----------------
  91
  92    --  Character case
  93
  94    function To_Fortran (Item : Character) return Character_Set is
  95    begin
  96       return Character_Set (Item);
  97    end To_Fortran;
  98
  99    --  String case (function returning converted result)
 100
 101    function To_Fortran (Item : String) return Fortran_Character is
 102       T : Fortran_Character (1 .. Item'Length);
 103
 104    begin
 105       for J in T'Range loop
 106          T (J) := Character_Set (Item (J - 1 + Item'First));
 107       end loop;
 108
 109       return T;
 110    end To_Fortran;
 111
 112    --  String case (procedure copying converted string to given buffer)
 113
 114    procedure To_Fortran
 115      (Item   : String;
 116       Target : out Fortran_Character;
 117       Last   : out Natural)
 118    is
 119    begin
 120       if Item'Length = 0 then
 121          Last := 0;
 122          return;
 123
 124       elsif Target'Length = 0 then
 125          raise Constraint_Error;
 126
 127       else
 128          Last := Target'First - 1;
 129
 130          for J in Item'Range loop
 131             Last := Last + 1;
 132
 133             if Last > Target'Last then
 134                raise Constraint_Error;
 135             else
 136                Target (Last) := Character_Set (Item (J));
 137             end if;
 138          end loop;
 139       end if;
 140    end To_Fortran;
 141
 142 end Interfaces.Fortran;