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|
--
-- Preprocessor to handle library source metacomments
--
-- Limitations:
-- - line metacomments must occur at end of line with no trailing space before the line break
-- - block metacomments must start in column 1
--
-- Supported line metacomments:
--
-- --!V87
-- --V87
-- --V93
-- --V08
--
-- Supported block metacomments:
--
-- --START-!V87
-- --END-!V87
--
-- --START-V93
-- --END-V93
--
-- --START-V08
-- --END-V08
--
--
with Ada.Command_Line; use Ada.Command_Line;
with Ada.Text_IO; use Ada.Text_IO;
procedure Ghdlfilter is
type Mode_Kind is (Mode_93, Mode_87, Mode_08);
Mode : Mode_Kind;
Line : String (1 .. 128);
Len : Natural;
Comment : Boolean;
Block_Comment : Boolean;
begin
if Argument_Count /= 1 then
Put_Line (Standard_Error, "usage: " & Command_Name & " -v93|-v87|-v08");
return;
end if;
if Argument (1) = "-v93" then
Mode := Mode_93;
elsif Argument (1) = "-v87" then
Mode := Mode_87;
elsif Argument (1) = "-v08" then
Mode := Mode_08;
else
Put_Line (Standard_Error, "bad mode");
return;
end if;
Block_Comment := False;
loop
exit when End_Of_File;
Get_Line (Line, Len);
Comment := Block_Comment;
--
-- look for line metacomments
--
if Len > 6 then
if Mode = Mode_87 and ( Line (Len - 5 .. Len) = "--!V87" ) then
Comment := True;
end if;
end if;
if Len > 5 then
if Mode = Mode_87 and ( (Line (Len - 4 .. Len) = "--V93") or (Line (Len - 4 .. Len) = "--V08") ) then
Comment := True;
elsif Mode = Mode_93 and ( (Line (Len - 4 .. Len) = "--V87") or (Line (Len - 4 .. Len) = "--V08") ) then
Comment := True;
elsif Mode = Mode_08 and ( (Line (Len - 4 .. Len) = "--V87") or (Line (Len - 4 .. Len) = "--V93") ) then
Comment := True;
end if;
end if;
--
-- look for block metacomment start
--
if Len = 12
and then Mode /= Mode_93
and then Line (1 .. 12) = "--START-!V87" then
Block_Comment := True;
end if;
if Len = 11
and then Mode /= Mode_93
and then Line (1 .. 11) = "--START-V93" then
Block_Comment := True;
end if;
if Len = 11
and then Mode /= Mode_08
and then Line (1 .. 11) = "--START-V08" then
Block_Comment := True;
end if;
--
-- look for block metacomment end
--
if Len = 9 and then ( (Line (1 .. 9) = "--END-V93") or (Line (1 .. 9) = "--END-V08") ) then
Block_Comment := False;
end if;
if Len = 10 and then ( Line (1 .. 10) = "--END-!V87" ) then
Block_Comment := False;
end if;
--
-- comment output lines as needed
--
if Comment then
Put ("-- ");
end if;
Put_Line (Line (1 .. Len));
end loop;
end Ghdlfilter;
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