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 --                                                                          --
  10 --        Copyright (C) 1992,1993,1994 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 other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNAT was originally developed  by the GNAT team at  New York University. --
  31 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 package body Interfaces.Fortran is
  36
  37    ------------
  38    -- To_Ada --
  39    ------------
  40
  41    --  Single character case
  42
  43    function To_Ada (Item : in Character_Set) return Character is
  44    begin
  45       return Character (Item);
  46    end To_Ada;
  47
  48    --  String case (function returning converted result)
  49
  50    function To_Ada (Item : in Fortran_Character) return String is
  51       T : String (1 .. Item'Length);
  52
  53    begin
  54       for J in T'Range loop
  55          T (J) := Character (Item (J - 1 + Item'First));
  56       end loop;
  57
  58       return T;
  59    end To_Ada;
  60
  61    --  String case (procedure copying converted string to given buffer)
  62
  63    procedure To_Ada
  64      (Item   : in Fortran_Character;
  65       Target : out String;
  66       Last   : out Natural)
  67    is
  68    begin
  69       if Item'Length = 0 then
  70          Last := 0;
  71          return;
  72
  73       elsif Target'Length = 0 then
  74          raise Constraint_Error;
  75
  76       else
  77          Last := Target'First - 1;
  78
  79          for J in Item'Range loop
  80             Last := Last + 1;
  81
  82             if Last > Target'Last then
  83                raise Constraint_Error;
  84             else
  85                Target (Last) := Character (Item (J));
  86             end if;
  87          end loop;
  88       end if;
  89    end To_Ada;
  90
  91    ----------------
  92    -- To_Fortran --
  93    ----------------
  94
  95    --  Character case
  96
  97    function To_Fortran (Item : in Character) return Character_Set is
  98    begin
  99       return Character_Set (Item);
 100    end To_Fortran;
 101
 102    --  String case (function returning converted result)
 103
 104    function To_Fortran (Item : in String) return Fortran_Character is
 105       T : Fortran_Character (1 .. Item'Length);
 106
 107    begin
 108       for J in T'Range loop
 109          T (J) := Character_Set (Item (J - 1 + Item'First));
 110       end loop;
 111
 112       return T;
 113    end To_Fortran;
 114
 115    --  String case (procedure copying converted string to given buffer)
 116
 117    procedure To_Fortran
 118      (Item   : in String;
 119       Target : out Fortran_Character;
 120       Last   : out Natural)
 121    is
 122    begin
 123       if Item'Length = 0 then
 124          Last := 0;
 125          return;
 126
 127       elsif Target'Length = 0 then
 128          raise Constraint_Error;
 129
 130       else
 131          Last := Target'First - 1;
 132
 133          for J in Item'Range loop
 134             Last := Last + 1;
 135
 136             if Last > Target'Last then
 137                raise Constraint_Error;
 138             else
 139                Target (Last) := Character_Set (Item (J));
 140             end if;
 141          end loop;
 142       end if;
 143    end To_Fortran;
 144
 145 end Interfaces.Fortran;