terminal_interface-curses-forms-field_types-enumeration.adb

# File : terminal_interface-curses-forms-field_types-enumeration.adb

    ------------------------------------------------------------------------------
    --                                                                          --
    --                           GNAT ncurses Binding                           --
    --                                                                          --
    --          Terminal_Interface.Curses.Forms.Field_Types.Enumeration         --
    --                                                                          --
    --                                 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:  Jürgen Pfeifer, 1996
    --  Contact: www.familiepfeifer.de/Contact.aspx?Lang=en
    --  Version Control:
    --  @Revision: 1.6 @
    --  Binding Version 01.00
    ------------------------------------------------------------------------------
    with Ada.Unchecked_Deallocation;
    with Interfaces.C; use Interfaces.C;
    with Interfaces.C.Strings; use Interfaces.C.Strings;
    with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;

    package body Terminal_Interface.Curses.Forms.Field_Types.Enumeration is

       function Create (Info               : Enumeration_Info;
                        Auto_Release_Names : Boolean := False)
                        return Enumeration_Field
       is
          procedure Release_String is
            new Ada.Unchecked_Deallocation (String,
                                            String_Access);
          E : Enumeration_Field;
          L : constant size_t := 1 + size_t (Info.C);
          S : String_Access;
       begin
          E.Case_Sensitive       := Info.Case_Sensitive;
          E.Match_Must_Be_Unique := Info.Match_Must_Be_Unique;
          E.Arr := new chars_ptr_array (size_t (1) .. L);
          for I in 1 .. Positive (L - 1) loop
             if Info.Names (I) = null then
                raise Form_Exception;
             end if;
             E.Arr (size_t (I)) := New_String (Info.Names (I).all);
             if Auto_Release_Names then
                S := Info.Names (I);
                Release_String (S);
             end if;
          end loop;
          E.Arr (L) := Null_Ptr;
          return E;
       end Create;

       procedure Release (Enum : in out Enumeration_Field)
       is
          I : size_t := 0;
          P : chars_ptr;
       begin
          loop
             P := Enum.Arr (I);
             exit when P = Null_Ptr;
             Free (P);
             Enum.Arr (I) := Null_Ptr;
             I := I + 1;
          end loop;
          Enum.Arr := null;
       end Release;

       procedure Set_Field_Type (Fld : in Field;
                                 Typ : in Enumeration_Field)
       is
          C_Enum_Type : C_Field_Type;
          pragma Import (C, C_Enum_Type, "TYPE_ENUM");

          function Set_Fld_Type (F    : Field := Fld;
                                 Cft  : C_Field_Type := C_Enum_Type;
                                 Arg1 : chars_ptr_array;
                                 Arg2 : C_Int;
                                 Arg3 : C_Int) return C_Int;
          pragma Import (C, Set_Fld_Type, "set_field_type");

          Res : Eti_Error;
       begin
          if Typ.Arr = null then
             raise Form_Exception;
          end if;
          Res := Set_Fld_Type (Arg1 => Typ.Arr.all,
                               Arg2 => C_Int (Boolean'Pos (Typ.Case_Sensitive)),
                               Arg3 => C_Int (Boolean'Pos
                                              (Typ.Match_Must_Be_Unique)));
          if Res /= E_Ok then
             Eti_Exception (Res);
          end if;
          Wrap_Builtin (Fld, Typ, C_Choice_Router);
       end Set_Field_Type;

    end Terminal_Interface.Curses.Forms.Field_Types.Enumeration;