release/src/router/libncurses/Ada95/samples/ncurses2-util.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                       GNAT ncurses Binding Samples                       --
   4 --                                                                          --
   5 --                               ncurses2.util                              --
   6 --                                                                          --
   7 --                                 B O D Y                                  --
   8 --                                                                          --
   9 ------------------------------------------------------------------------------
  10 -- Copyright (c) 2000-2006,2008 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: Eugene V. Melaragno <aldomel@ix.netcom.com> 2000
  37 --  Version Control
  38 --  $Revision: 1.7 $
  39 --  $Date: 2008/07/26 18:51:20 $
  40 --  Binding Version 01.00
  41 ------------------------------------------------------------------------------
  42 with Ada.Text_IO; use Ada.Text_IO;
  43
  44 pragma Warnings (Off);
  45 with Terminal_Interface.Curses.Aux;
  46 pragma Warnings (On);
  47
  48 with Terminal_Interface.Curses.Trace; use Terminal_Interface.Curses.Trace;
  49
  50 with Interfaces.C;
  51 with Interfaces.C.Strings;
  52
  53 with Ada.Characters.Handling;
  54
  55 with ncurses2.genericPuts;
  56
  57 package body ncurses2.util is
  58
  59    --  #defines from C
  60    --  #define CTRL(x)         ((x) & 0x1f)
  61    function CTRL (c : Character) return Key_Code is
  62    begin
  63       return Character'Pos (c) mod 16#20#;
  64       --  uses a property of ASCII
  65       --  A = 16#41#; a = 16#61#; ^A = 1 or 16#1#
  66    end CTRL;
  67
  68    function CTRL (c : Character) return Character is
  69    begin
  70       return Character'Val (Character'Pos (c) mod 16#20#);
  71       --  uses a property of ASCII
  72       --  A = 16#41#; a = 16#61#; ^A = 1 or 16#1#
  73    end CTRL;
  74
  75    save_trace : Trace_Attribute_Set;
  76    --  Common function to allow ^T to toggle trace-mode in the middle of a test
  77    --  so that trace-files can be made smaller.
  78    function Getchar (win : Window := Standard_Window) return Key_Code is
  79       c : Key_Code;
  80    begin
  81       --  #ifdef TRACE
  82       c := Get_Keystroke (win);
  83       while c = CTRL ('T') loop
  84          --  if _nc_tracing  in C
  85          if Current_Trace_Setting /= Trace_Disable then
  86             save_trace := Current_Trace_Setting;
  87             Trace_Put ("TOGGLE-TRACING OFF");
  88             Current_Trace_Setting := Trace_Disable;
  89          else
  90             Current_Trace_Setting := save_trace;
  91          end if;
  92          Trace_On (Current_Trace_Setting);
  93          if Current_Trace_Setting /= Trace_Disable then
  94             Trace_Put ("TOGGLE-TRACING ON");
  95          end if;
  96       end loop;
  97       --  #else c := Get_Keystroke;
  98       return c;
  99    end Getchar;
 100
 101    procedure Getchar (win : Window := Standard_Window) is
 102    begin
 103       if Getchar (win) < 0 then
 104          Beep;
 105       end if;
 106    end Getchar;
 107
 108    procedure Pause is
 109    begin
 110       Move_Cursor (Line => Lines - 1, Column => 0);
 111       Add (Str => "Press any key to continue... ");
 112       Getchar;
 113    end Pause;
 114
 115    procedure Cannot (s : String) is
 116       use Interfaces.C;
 117       use Interfaces.C.Strings;
 118       use Terminal_Interface.Curses.Aux;
 119       function getenv (x : char_array)  return chars_ptr;
 120       pragma Import (C, getenv, "getenv");
 121       tmp1 : char_array (0 .. 10);
 122       package p is new ncurses2.genericPuts (1024);
 123       use p;
 124       use p.BS;
 125
 126       tmpb : BS.Bounded_String;
 127
 128       Length : size_t;
 129    begin
 130       To_C ("TERM", tmp1, Length);
 131       Fill_String (getenv (tmp1), tmpb);
 132       Add (Ch => newl);
 133       myAdd (Str => "This " & tmpb & " terminal " & s);
 134       Pause;
 135    end Cannot;
 136
 137    procedure ShellOut (message : Boolean) is
 138       use Interfaces.C;
 139       Txt : char_array (0 .. 10);
 140       Length : size_t;
 141       procedure system (x : char_array);
 142       pragma Import (C, system, "system");
 143    begin
 144       To_C ("sh", Txt,  Length);
 145       if message then
 146          Add (Str => "Shelling out...");
 147       end if;
 148       Save_Curses_Mode (Mode => Curses);
 149       End_Windows;
 150       system (Txt);
 151       if message then
 152          Add (Str => "returned from shellout.");
 153          Add (Ch => newl);
 154       end if;
 155       Refresh;
 156    end ShellOut;
 157
 158    function Is_Digit (c : Key_Code) return Boolean is
 159    begin
 160       if c >= 16#100# then
 161          return False;
 162       else
 163          return Ada.Characters.Handling.Is_Digit (Character'Val (c));
 164       end if;
 165    end Is_Digit;
 166
 167    procedure P (s : String) is
 168    begin
 169       Add (Str => s);
 170       Add (Ch => newl);
 171    end P;
 172
 173    function Code_To_Char (c : Key_Code) return Character is
 174    begin
 175       if c > Character'Pos (Character'Last) then
 176          return Character'Val (0);
 177          --  maybe raise exception?
 178       else
 179          return Character'Val (c);
 180       end if;
 181    end Code_To_Char;
 182
 183    --  This was untestable due to a bug in GNAT (3.12p)
 184    --  Hmm, what bug? I don't remember.
 185    function ctoi (c : Character) return Integer is
 186    begin
 187       return Character'Pos (c) - Character'Pos ('0');
 188    end ctoi;
 189
 190 end ncurses2.util;