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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;