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------------------------------------------------------------------------------
-- --
-- GNAT ncurses Binding --
-- --
-- Terminal_Interface.Curses.Forms.Field_Types.User --
-- --
-- B O D Y --
-- --
------------------------------------------------------------------------------
-- Copyright (c) 1998 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
-- Contact: http://www.familiepfeifer.de/Contact.aspx?Lang=en
-- Version Control:
-- $Revision$
-- Binding Version 01.00
------------------------------------------------------------------------------
with Ada.Unchecked_Conversion;
with Interfaces.C;
with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
package body Terminal_Interface.Curses.Forms.Field_Types.User is
use type Interfaces.C.int;
procedure Set_Field_Type (Fld : in Field;
Typ : in User_Defined_Field_Type)
is
function Allocate_Arg (T : User_Defined_Field_Type'Class)
return Argument_Access;
function Set_Fld_Type (F : Field := Fld;
Cft : C_Field_Type := C_Generic_Type;
Arg1 : Argument_Access)
return C_Int;
pragma Import (C, Set_Fld_Type, "set_field_type");
Res : Eti_Error;
function Allocate_Arg (T : User_Defined_Field_Type'Class)
return Argument_Access
is
Ptr : Field_Type_Access := new User_Defined_Field_Type'Class'(T);
begin
return new Argument'(Usr => System.Null_Address,
Typ => Ptr,
Cft => Null_Field_Type);
end Allocate_Arg;
begin
Res := Set_Fld_Type (Arg1 => Allocate_Arg (Typ));
if Res /= E_Ok then
Eti_Exception (Res);
end if;
end Set_Field_Type;
function To_Argument_Access is new Ada.Unchecked_Conversion
(System.Address, Argument_Access);
function Generic_Field_Check (Fld : Field;
Usr : System.Address) return C_Int
is
Result : Boolean;
Udf : User_Defined_Field_Type_Access :=
User_Defined_Field_Type_Access (To_Argument_Access (Usr).Typ);
begin
Result := Field_Check (Fld, Udf.all);
return C_Int (Boolean'Pos (Result));
end Generic_Field_Check;
function Generic_Char_Check (Ch : C_Int;
Usr : System.Address) return C_Int
is
Result : Boolean;
Udf : User_Defined_Field_Type_Access :=
User_Defined_Field_Type_Access (To_Argument_Access (Usr).Typ);
begin
Result := Character_Check (Character'Val (Ch), Udf.all);
return C_Int (Boolean'Pos (Result));
end Generic_Char_Check;
-- -----------------------------------------------------------------------
--
function C_Generic_Type return C_Field_Type
is
Res : Eti_Error;
T : C_Field_Type;
begin
if M_Generic_Type = Null_Field_Type then
T := New_Fieldtype (Generic_Field_Check'Access,
Generic_Char_Check'Access);
if T = Null_Field_Type then
raise Form_Exception;
else
Res := Set_Fieldtype_Arg (T,
Make_Arg'Access,
Copy_Arg'Access,
Free_Arg'Access);
if Res /= E_Ok then
Eti_Exception (Res);
end if;
end if;
M_Generic_Type := T;
end if;
pragma Assert (M_Generic_Type /= Null_Field_Type);
return M_Generic_Type;
end C_Generic_Type;
end Terminal_Interface.Curses.Forms.Field_Types.User;
|
