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-- GHDL Run Time (GRT) - Stupid emulation of readline using stdio
-- Copyright (C) 2022 Tristan Gingold
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 2 of the License, or
-- (at your option) any later version.
--
-- 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 <gnu.org/licenses>.
--
-- As a special exception, if other files instantiate generics from this
-- unit, or you link this unit with other files to produce an executable,
-- this unit does not by itself cause the resulting executable to be
-- covered by the GNU General Public License. This exception does not
-- however invalidate any other reasons why the executable file might be
-- covered by the GNU Public License.
with Grt.C; use Grt.C;
with Grt.Stdio; use Grt.Stdio;
package body Grt.Readline_None is
function Readline (Prompt : Ghdl_C_String) return Ghdl_C_String
is
Linep : Ghdl_C_String;
Cap : size_t;
Len : Positive;
C : int;
begin
C := fputs (To_Address (Prompt), stdout);
-- Mimic getline(), which is not available on windows.
Cap := 64;
Linep := To_Ghdl_C_String (Malloc (Cap));
if Linep = null then
return null;
end if;
Len := 1;
loop
C := fgetc (stdin);
exit when C < 0 or C = Character'Pos (ASCII.LF);
Len := Len + 1;
if size_t (Len) = Cap then
Cap := Cap * 2;
Linep := To_Ghdl_C_String (Realloc (To_Address (Linep), Cap));
if Linep = null then
return null;
end if;
end if;
Linep (Len - 1) := Character'Val (C);
end loop;
Linep (Len) := ASCII.NUL;
return Linep;
end Readline;
procedure Add_History (Line : Ghdl_C_String) is
begin
null;
end Add_History;
end Grt.Readline_None;
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