Ada95/samples/sample-my_field_type.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                       GNAT ncurses Binding Samples                       --
   4 --                                                                          --
   5 --                           Sample.My_Field_Type                           --
   6 --                                                                          --
   7 --                                 B O D Y                                  --
   8 --                                                                          --
   9 ------------------------------------------------------------------------------
  10 -- Copyright (c) 1998-2006,2008 Free Software Foundation, Inc.              --
  11 --                                                                          --
  12 -- Permission is hereby granted, free of charge, to any person obtaining a  --
  13 -- copy of this software and associated documentation files (the            --
  14 -- "Software"), to deal in the Software without restriction, including      --
  15 -- without limitation the rights to use, copy, modify, merge, publish,      --
  16 -- distribute, distribute with modifications, sublicense, and/or sell       --
  17 -- copies of the Software, and to permit persons to whom the Software is    --
  18 -- furnished to do so, subject to the following conditions:                 --
  19 --                                                                          --
  20 -- The above copyright notice and this permission notice shall be included  --
  21 -- in all copies or substantial portions of the Software.                   --
  22 --                                                                          --
  23 -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  --
  24 -- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               --
  25 -- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   --
  26 -- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   --
  27 -- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    --
  28 -- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    --
  29 -- THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               --
  30 --                                                                          --
  31 -- Except as contained in this notice, the name(s) of the above copyright   --
  32 -- holders shall not be used in advertising or otherwise to promote the     --
  33 -- sale, use or other dealings in this Software without prior written       --
  34 -- authorization.                                                           --
  35 ------------------------------------------------------------------------------
  36 --  Author:  Juergen Pfeifer, 1996
  37 --  Version Control
  38 --  $Revision: 1.16 $
  39 --  $Date: 2008/07/26 18:47:58 $
  40 --  Binding Version 01.00
  41 ------------------------------------------------------------------------------
  42
  43 --  This is a very simple user defined field type. It accepts only a
  44 --  defined character as input into the field.
  45 --
  46 package body Sample.My_Field_Type is
  47
  48    --  That's simple. There are minimal field validity checks.
  49    function Field_Check (Fld : Field;
  50                          Typ : My_Data) return Boolean
  51    is
  52    begin
  53       if Fld = Null_Field or Typ.Ch = Character'Val (0) then
  54          return False;
  55       end if;
  56       return True;
  57    end Field_Check;
  58
  59    --  Check exactly against the specified character.
  60    function Character_Check (Ch  : Character;
  61                              Typ : My_Data) return Boolean
  62    is
  63       C : constant Character := Typ.Ch;
  64    begin
  65       return Ch = C;
  66    end Character_Check;
  67
  68 end Sample.My_Field_Type;