/usr/share/doc/libncursesada-doc/examples/sample-my_field_type.adb is in libncursesada-doc 5.9.20140726-1.
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-- --
-- GNAT ncurses Binding Samples --
-- --
-- Sample.My_Field_Type --
-- --
-- B O D Y --
-- --
------------------------------------------------------------------------------
-- Copyright (c) 1998-2006,2008 Free Software Foundation, Inc. --
-- --
-- Permission is hereby granted, free of charge, to any person obtaining a --
-- copy of this software and associated documentation files (the --
-- "Software"), to deal in the Software without restriction, including --
-- without limitation the rights to use, copy, modify, merge, publish, --
-- distribute, distribute with modifications, sublicense, and/or sell --
-- copies of the Software, and to permit persons to whom the Software is --
-- furnished to do so, subject to the following conditions: --
-- --
-- The above copyright notice and this permission notice shall be included --
-- in all copies or substantial portions of the Software. --
-- --
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS --
-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF --
-- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. --
-- IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, --
-- DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR --
-- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR --
-- THE USE OR OTHER DEALINGS IN THE SOFTWARE. --
-- --
-- Except as contained in this notice, the name(s) of the above copyright --
-- holders shall not be used in advertising or otherwise to promote the --
-- sale, use or other dealings in this Software without prior written --
-- authorization. --
------------------------------------------------------------------------------
-- Author: Juergen Pfeifer, 1996
-- Version Control
-- $Revision: 1.16 $
-- $Date: 2008/07/26 18:47:58 $
-- Binding Version 01.00
------------------------------------------------------------------------------
-- This is a very simple user defined field type. It accepts only a
-- defined character as input into the field.
--
package body Sample.My_Field_Type is
-- That's simple. There are minimal field validity checks.
function Field_Check (Fld : Field;
Typ : My_Data) return Boolean
is
begin
if Fld = Null_Field or Typ.Ch = Character'Val (0) then
return False;
end if;
return True;
end Field_Check;
-- Check exactly against the specified character.
function Character_Check (Ch : Character;
Typ : My_Data) return Boolean
is
C : constant Character := Typ.Ch;
begin
return Ch = C;
end Character_Check;
end Sample.My_Field_Type;
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