1 ------------------------------------------------------------------------------
3 -- GNAT ncurses Binding --
5 -- Terminal_Interface.Curses.Forms.Field_Types.User --
9 ------------------------------------------------------------------------------
10 -- Copyright (c) 1998 Free Software Foundation, Inc. --
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: --
20 -- The above copyright notice and this permission notice shall be included --
21 -- in all copies or substantial portions of the Software. --
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. --
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 --
35 ------------------------------------------------------------------------------
36 -- Author: Juergen Pfeifer <juergen.pfeifer@gmx.net> 1996
39 -- Binding Version 01.00
40 ------------------------------------------------------------------------------
41 with Ada.Unchecked_Conversion;
43 with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
45 package body Terminal_Interface.Curses.Forms.Field_Types.User is
47 use type Interfaces.C.int;
49 procedure Set_Field_Type (Fld : in Field;
50 Typ : in User_Defined_Field_Type)
52 function Allocate_Arg (T : User_Defined_Field_Type'Class)
53 return Argument_Access;
55 function Set_Fld_Type (F : Field := Fld;
56 Cft : C_Field_Type := C_Generic_Type;
57 Arg1 : Argument_Access)
59 pragma Import (C, Set_Fld_Type, "set_field_type");
63 function Allocate_Arg (T : User_Defined_Field_Type'Class)
64 return Argument_Access
66 Ptr : Field_Type_Access := new User_Defined_Field_Type'Class'(T);
68 return new Argument'(Usr => System.Null_Address,
70 Cft => Null_Field_Type);
74 Res := Set_Fld_Type (Arg1 => Allocate_Arg (Typ));
80 function To_Argument_Access is new Ada.Unchecked_Conversion
81 (System.Address, Argument_Access);
83 function Generic_Field_Check (Fld : Field;
84 Usr : System.Address) return C_Int
87 Udf : User_Defined_Field_Type_Access :=
88 User_Defined_Field_Type_Access (To_Argument_Access (Usr).Typ);
90 Result := Field_Check (Fld, Udf.all);
91 return C_Int (Boolean'Pos (Result));
92 end Generic_Field_Check;
94 function Generic_Char_Check (Ch : C_Int;
95 Usr : System.Address) return C_Int
98 Udf : User_Defined_Field_Type_Access :=
99 User_Defined_Field_Type_Access (To_Argument_Access (Usr).Typ);
101 Result := Character_Check (Character'Val (Ch), Udf.all);
102 return C_Int (Boolean'Pos (Result));
103 end Generic_Char_Check;
105 -- -----------------------------------------------------------------------
107 function C_Generic_Type return C_Field_Type
112 if M_Generic_Type = Null_Field_Type then
113 T := New_Fieldtype (Generic_Field_Check'Access,
114 Generic_Char_Check'Access);
115 if T = Null_Field_Type then
116 raise Form_Exception;
118 Res := Set_Fieldtype_Arg (T,
128 pragma Assert (M_Generic_Type /= Null_Field_Type);
129 return M_Generic_Type;
132 end Terminal_Interface.Curses.Forms.Field_Types.User;