release/src/router/libncurses/Ada95/src/terminal_interface-curses-termcap.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                           GNAT ncurses Binding                           --
   4 --                                                                          --
   5 --                    Terminal_Interface.Curses.Termcap                     --
   6 --                                                                          --
   7 --                                 B O D Y                                  --
   8 --                                                                          --
   9 ------------------------------------------------------------------------------
  10 -- Copyright (c) 2000-2006,2009 Free Software Foundation, Inc.              --
  11 --                                                                          --
  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:                 --
  19 --                                                                          --
  20 -- The above copyright notice and this permission notice shall be included  --
  21 -- in all copies or substantial portions of the Software.                   --
  22 --                                                                          --
  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.                               --
  30 --                                                                          --
  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       --
  34 -- authorization.                                                           --
  35 ------------------------------------------------------------------------------
  36 --  Author:  Juergen Pfeifer, 1996
  37 --  Version Control:
  38 --  $Revision: 1.12 $
  39 --  $Date: 2009/12/26 17:38:58 $
  40 --  Binding Version 01.00
  41 ------------------------------------------------------------------------------
  42
  43 with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
  44 with Interfaces.C; use Interfaces.C;
  45 with Interfaces.C.Strings; use Interfaces.C.Strings;
  46
  47 package body Terminal_Interface.Curses.Termcap is
  48
  49    function Get_Entry (Name : String) return Boolean
  50    is
  51       function tgetent (name : char_array; val : char_array)
  52                         return C_Int;
  53       pragma Import (C, tgetent, "tgetent");
  54       NameTxt : char_array (0 .. Name'Length);
  55       Length  : size_t;
  56       ignored : constant char_array (0 .. 0) := (0 => nul);
  57       result  : C_Int;
  58    begin
  59       To_C (Name, NameTxt, Length);
  60       result := tgetent (char_array (ignored), NameTxt);
  61       if result = -1 then
  62          raise Curses_Exception;
  63       else
  64          return Boolean'Val (result);
  65       end if;
  66    end Get_Entry;
  67
  68 ------------------------------------------------------------------------------
  69    function Get_Flag (Name : String) return Boolean
  70    is
  71       function tgetflag (id : char_array) return C_Int;
  72       pragma Import (C, tgetflag, "tgetflag");
  73       Txt    : char_array (0 .. Name'Length);
  74       Length : size_t;
  75    begin
  76       To_C (Name, Txt, Length);
  77       if tgetflag (Txt) = 0 then
  78          return False;
  79       else
  80          return True;
  81       end if;
  82    end Get_Flag;
  83
  84 ------------------------------------------------------------------------------
  85    procedure Get_Number (Name   : String;
  86                          Value  : out Integer;
  87                          Result : out Boolean)
  88    is
  89       function tgetnum (id : char_array) return C_Int;
  90       pragma Import (C, tgetnum, "tgetnum");
  91       Txt    : char_array (0 .. Name'Length);
  92       Length : size_t;
  93    begin
  94       To_C (Name, Txt, Length);
  95       Value := Integer (tgetnum (Txt));
  96       if Value = -1 then
  97          Result := False;
  98       else
  99          Result :=  True;
 100       end if;
 101    end Get_Number;
 102
 103 ------------------------------------------------------------------------------
 104    procedure Get_String (Name   : String;
 105                          Value  : out String;
 106                          Result : out Boolean)
 107    is
 108       function tgetstr (id  : char_array;
 109                         buf : char_array) return chars_ptr;
 110       pragma Import (C, tgetstr, "tgetstr");
 111       Txt    : char_array (0 .. Name'Length);
 112       Length : size_t;
 113       Txt2   : chars_ptr;
 114       type t is new char_array (0 .. 1024); --  does it need to be 1024?
 115       Return_Buffer : constant t := (others => nul);
 116    begin
 117       To_C (Name, Txt, Length);
 118       Txt2 := tgetstr (Txt, char_array (Return_Buffer));
 119       if Txt2 = Null_Ptr then
 120          Result := False;
 121       else
 122          Value := Fill_String (Txt2);
 123          Result := True;
 124       end if;
 125    end Get_String;
 126
 127    function Get_String (Name : String) return Boolean
 128    is
 129       function tgetstr (Id  : char_array;
 130                         buf : char_array) return chars_ptr;
 131       pragma Import (C, tgetstr, "tgetstr");
 132       Txt    : char_array (0 .. Name'Length);
 133       Length : size_t;
 134       Txt2   : chars_ptr;
 135       type t is new char_array (0 .. 1024); --  does it need to be 1024?
 136       Phony_Txt : constant t := (others => nul);
 137    begin
 138       To_C (Name, Txt, Length);
 139       Txt2 := tgetstr (Txt, char_array (Phony_Txt));
 140       if Txt2 = Null_Ptr then
 141          return False;
 142       else
 143          return True;
 144       end if;
 145    end Get_String;
 146
 147 ------------------------------------------------------------------------------
 148    function TGoto (Cap : String;
 149                    Col : Column_Position;
 150                    Row : Line_Position) return Termcap_String is
 151       function tgoto (cap : char_array;
 152                       col : C_Int;
 153                       row : C_Int) return chars_ptr;
 154       pragma Import (C, tgoto);
 155       Txt    : char_array (0 .. Cap'Length);
 156       Length : size_t;
 157    begin
 158       To_C (Cap, Txt, Length);
 159       return Termcap_String (Fill_String
 160                              (tgoto (Txt, C_Int (Col), C_Int (Row))));
 161    end TGoto;
 162
 163 end Terminal_Interface.Curses.Termcap;