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-- Topal: GPG/GnuPG and Alpine/Pine integration
-- Copyright (C) 2001--2008 Phillip J. Brooke
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License version 3 as
-- published by the Free Software Foundation.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
with Ada.Text_IO;
with Externals.Simple;
with Globals;
with Interfaces.C;
with Interfaces.C.Strings;
package body Readline is
pragma Linker_Options("ada-readline-c.o");
pragma Linker_Options("-lreadline");
function C_Get_String (Prompt : in Interfaces.C.Char_Array)
return Interfaces.C.Strings.Chars_Ptr;
pragma Import(C, C_Get_String, "rl_gets");
procedure C_Add_History (History : in Interfaces.C.Char_Array);
pragma Import(C, C_Add_History, "add_history");
procedure C_Disable_Tab_Completion;
pragma Import(C, C_Disable_Tab_Completion, "rl_disable_tab_completion");
procedure C_Enable_Tab_Completion;
pragma Import(C, C_Enable_Tab_Completion, "rl_enable_tab_completion");
procedure C_Read_History(F : in Interfaces.C.Char_Array);
pragma Import(C, C_Read_History, "read_history");
procedure C_Write_History(F : in Interfaces.C.Char_Array);
pragma Import(C, C_Write_History, "write_history");
function Get_String (Prompt : String := "";
Enable_Tab_Completion : Boolean := False)
return String is
use Interfaces.C;
use Interfaces.C.Strings;
C_Result : Chars_Ptr;
begin
if Enable_Tab_Completion then
C_Enable_Tab_Completion;
else
C_Disable_Tab_Completion;
end if;
C_Result := C_Get_String(To_C(Prompt));
return To_Ada(Value(C_Result));
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Readline.Get_String");
raise;
end Get_String;
procedure Add_History (History : in String;
Remove_Empty : in Boolean := True) is
begin
if not (Remove_Empty and History = "") then
C_Add_History(Interfaces.C.To_C(History));
end if;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Readline.Add_History");
raise;
end Add_History;
procedure Save_History is
begin
C_Write_History(Interfaces.C.To_C(Globals.ToStr(Globals.Topal_Directory) & "/history"));
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Readline.Save_History");
raise;
end Save_History;
procedure Load_History is
H : constant String := Globals.ToStr(Globals.Topal_Directory) & "/history";
begin
if Externals.Simple.Test_R(H) then
C_Read_History(Interfaces.C.To_C(H));
end if;
exception
when others =>
Ada.Text_IO.Put_Line(Ada.Text_IO.Standard_Error,
"Exception raised in Readline.Load_History");
raise;
end Load_History;
end Readline;
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