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

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                           GNAT ncurses Binding                           --
   4 --                                                                          --
   5 --                    Terminal_Interface.Curses.Terminfo                    --
   6 --                                                                          --
   7 --                                 B O D Y                                  --
   8 --                                                                          --
   9 ------------------------------------------------------------------------------
  10 -- Copyright (c) 1998-2006,2009 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: 1.6 $
  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 with Ada.Unchecked_Conversion;
  47
  48 package body Terminal_Interface.Curses.Terminfo is
  49
  50    function Is_MinusOne_Pointer (P : chars_ptr) return Boolean;
  51
  52    function Is_MinusOne_Pointer (P : chars_ptr) return Boolean is
  53       type Weird_Address is new System.Storage_Elements.Integer_Address;
  54       Invalid_Pointer : constant Weird_Address := -1;
  55       function To_Weird is new Ada.Unchecked_Conversion
  56         (Source => chars_ptr, Target => Weird_Address);
  57    begin
  58       if To_Weird (P) = Invalid_Pointer then
  59          return True;
  60       else
  61          return False;
  62       end if;
  63    end Is_MinusOne_Pointer;
  64    pragma Inline (Is_MinusOne_Pointer);
  65
  66 ------------------------------------------------------------------------------
  67    function Get_Flag (Name : String) return Boolean
  68    is
  69       function tigetflag (id : char_array) return Curses_Bool;
  70       pragma Import (C, tigetflag);
  71       Txt    : char_array (0 .. Name'Length);
  72       Length : size_t;
  73    begin
  74       To_C (Name, Txt, Length);
  75       if tigetflag (Txt) = Curses_Bool (Curses_True) then
  76          return True;
  77       else
  78          return False;
  79       end if;
  80    end Get_Flag;
  81
  82 ------------------------------------------------------------------------------
  83    procedure Get_String (Name   : String;
  84                          Value  : out Terminfo_String;
  85                          Result : out Boolean)
  86    is
  87       function tigetstr (id : char_array) return chars_ptr;
  88       pragma Import (C, tigetstr, "tigetstr");
  89       Txt    : char_array (0 .. Name'Length);
  90       Length : size_t;
  91       Txt2 : chars_ptr;
  92    begin
  93       To_C (Name, Txt, Length);
  94       Txt2 := tigetstr (Txt);
  95       if Txt2 = Null_Ptr then
  96          Result := False;
  97       elsif Is_MinusOne_Pointer (Txt2) then
  98          raise Curses_Exception;
  99       else
 100          Value  := Terminfo_String (Fill_String (Txt2));
 101          Result := True;
 102       end if;
 103    end Get_String;
 104
 105 ------------------------------------------------------------------------------
 106    function Has_String (Name : String) return Boolean
 107    is
 108       function tigetstr (id : char_array) return chars_ptr;
 109       pragma Import (C, tigetstr, "tigetstr");
 110       Txt    : char_array (0 .. Name'Length);
 111       Length : size_t;
 112       Txt2 : chars_ptr;
 113    begin
 114       To_C (Name, Txt, Length);
 115       Txt2 := tigetstr (Txt);
 116       if Txt2 = Null_Ptr then
 117          return False;
 118       elsif Is_MinusOne_Pointer (Txt2) then
 119          raise Curses_Exception;
 120       else
 121          return True;
 122       end if;
 123    end Has_String;
 124
 125 ------------------------------------------------------------------------------
 126    function Get_Number (Name : String) return Integer is
 127       function tigetstr (s : char_array) return C_Int;
 128       pragma Import (C, tigetstr);
 129       Txt    : char_array (0 .. Name'Length);
 130       Length : size_t;
 131    begin
 132       To_C (Name, Txt, Length);
 133       return Integer (tigetstr (Txt));
 134    end Get_Number;
 135
 136 ------------------------------------------------------------------------------
 137    procedure Put_String (Str    : Terminfo_String;
 138                          affcnt : Natural := 1;
 139                          putc   : putctype := null) is
 140       function tputs (str    : char_array;
 141                       affcnt : C_Int;
 142                       putc   : putctype) return C_Int;
 143       function putp (str : char_array) return C_Int;
 144       pragma Import (C, tputs);
 145       pragma Import (C, putp);
 146       Txt    : char_array (0 .. Str'Length);
 147       Length : size_t;
 148       Err : C_Int;
 149    begin
 150       To_C (String (Str), Txt, Length);
 151       if putc = null then
 152          Err := putp (Txt);
 153       else
 154          Err := tputs (Txt, C_Int (affcnt), putc);
 155       end if;
 156       if Err = Curses_Err then
 157          raise Curses_Exception;
 158       end if;
 159    end Put_String;
 160
 161 end Terminal_Interface.Curses.Terminfo;