File : terminal_interface-curses-terminfo.adb
------------------------------------------------------------------------------
-- --
-- GNAT ncurses Binding --
-- --
-- Terminal_Interface.Curses.Terminfo --
-- --
-- B O D Y --
-- --
------------------------------------------------------------------------------
-- Copyright (c) 2000 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: Juergen Pfeifer, 1996
-- Version Control:
-- @Revision: 1.3 @
-- Binding Version 01.00
------------------------------------------------------------------------------
with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
with Interfaces.C; use Interfaces.C;
with Interfaces.C.Strings; use Interfaces.C.Strings;
with Ada.Unchecked_Conversion;
package body Terminal_Interface.Curses.Terminfo is
function Is_MinusOne_Pointer (P : in chars_ptr) return Boolean;
function Is_MinusOne_Pointer (P : in chars_ptr) return Boolean is
type Weird_Address is new System.Storage_Elements.Integer_Address;
Invalid_Pointer : constant Weird_Address := -1;
function To_Weird is new Ada.Unchecked_Conversion
(Source => chars_ptr, Target => Weird_Address);
begin
if To_Weird (P) = Invalid_Pointer then
return True;
else
return False;
end if;
end Is_MinusOne_Pointer;
pragma Inline (Is_MinusOne_Pointer);
------------------------------------------------------------------------------
function Get_Flag (Name : String) return Boolean
is
function tigetflag (id : char_array) return Curses_Bool;
pragma Import (C, tigetflag);
Txt : char_array (0 .. Name'Length);
Length : size_t;
begin
To_C (Name, Txt, Length);
if tigetflag (Txt) = Curses_Bool (Curses_True) then
return True;
else
return False;
end if;
end Get_Flag;
------------------------------------------------------------------------------
procedure Get_String (Name : String;
Value : out Terminfo_String;
Result : out Boolean)
is
function tigetstr (id : char_array) return chars_ptr;
pragma Import (C, tigetstr, "tigetstr");
Txt : char_array (0 .. Name'Length);
Length : size_t;
Txt2 : chars_ptr;
begin
To_C (Name, Txt, Length);
Txt2 := tigetstr (Txt);
if Txt2 = Null_Ptr then
Result := False;
elsif Is_MinusOne_Pointer (Txt2) then
raise Curses_Exception;
else
Value := Terminfo_String (Fill_String (Txt2));
Result := True;
end if;
end Get_String;
------------------------------------------------------------------------------
function Has_String (Name : String) return Boolean
is
function tigetstr (id : char_array) return chars_ptr;
pragma Import (C, tigetstr, "tigetstr");
Txt : char_array (0 .. Name'Length);
Length : size_t;
Txt2 : chars_ptr;
begin
To_C (Name, Txt, Length);
Txt2 := tigetstr (Txt);
if Txt2 = Null_Ptr then
return False;
elsif Is_MinusOne_Pointer (Txt2) then
raise Curses_Exception;
else
return True;
end if;
end Has_String;
------------------------------------------------------------------------------
function Get_Number (Name : String) return Integer is
function tigetstr (s : char_array) return C_Int;
pragma Import (C, tigetstr);
Txt : char_array (0 .. Name'Length);
Length : size_t;
begin
To_C (Name, Txt, Length);
return Integer (tigetstr (Txt));
end Get_Number;
------------------------------------------------------------------------------
procedure Put_String (Str : Terminfo_String;
affcnt : Natural := 1;
putc : putctype := null) is
function tputs (str : char_array;
affcnt : C_Int;
putc : putctype) return C_Int;
function putp (str : char_array) return C_Int;
pragma Import (C, tputs);
pragma Import (C, putp);
Txt : char_array (0 .. Str'Length);
Length : size_t;
Err : C_Int;
begin
To_C (String (Str), Txt, Length);
if putc = null then
Err := putp (Txt);
else
Err := tputs (Txt, C_Int (affcnt), putc);
end if;
if Err = Curses_Err then
raise Curses_Exception;
end if;
end Put_String;
end Terminal_Interface.Curses.Terminfo;