X-Git-Url: http://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=Ada95%2Fsrc%2Fterminal_interface-curses-forms-field_types-user.adb;fp=Ada95%2Fsrc%2Fterminal_interface-curses-forms-field_types-user.adb;h=aa923c4d27aaa2ed28bcea47285b29c103168a81;hp=0000000000000000000000000000000000000000;hb=0eb88fc5281804773e2a0c7a488a4452463535ce;hpb=661078ddbde3ce0f3b06e95642fbb9b5fef7dca1 diff --git a/Ada95/src/terminal_interface-curses-forms-field_types-user.adb b/Ada95/src/terminal_interface-curses-forms-field_types-user.adb new file mode 100644 index 00000000..aa923c4d --- /dev/null +++ b/Ada95/src/terminal_interface-curses-forms-field_types-user.adb @@ -0,0 +1,132 @@ +------------------------------------------------------------------------------ +-- -- +-- 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 +-- Version Control: +-- $Revision: 1.8 $ +-- 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;