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parser_buffer.e
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1999-06-05
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-- This file is part of SmallEiffel The GNU Eiffel Compiler.
-- Copyright (C) 1994-98 LORIA - UHP - CRIN - INRIA - FRANCE
-- Dominique COLNET and Suzanne COLLIN - colnet@loria.fr
-- http://SmallEiffel.loria.fr
-- SmallEiffel 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, or (at your option) any later
-- version. SmallEiffel 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 SmallEiffel; see the file COPYING. If not,
-- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-- Boston, MA 02111-1307, USA.
--
class PARSER_BUFFER
inherit GLOBALS;
creation make
feature
path: STRING;
-- When `is_ready', gives the `path' of the corresponding
-- buffered file.
count: INTEGER;
-- Number of lines in the source file.
is_ready: BOOLEAN is
do
Result := path /= Void;
end;
feature {SMALL_EIFFEL,EIFFEL_PARSER}
load_file(a_path: STRING) is
-- Try to load `a_path' and set `is_ready' when corresponding
-- file has been loaded.
local
i: INTEGER;
do
tmp_file_read.connect_to(a_path);
if tmp_file_read.is_connected then
path := a_path;
from
if get_line(0) /= Void then
-- unused line.
end;
i := 1;
tmp_file_read.read_line_in(get_line(i));
until
tmp_file_read.end_of_input
loop
i := i + 1;
tmp_file_read.read_line_in(get_line(i));
end;
if text.item(i).empty then
count := i - 1;
else
count := i;
end;
tmp_file_read.disconnect;
else
path := Void;
end;
end;
unset_is_ready is
do
path := Void;
end;
feature {EIFFEL_PARSER}
item(line: INTEGER): STRING is
require
is_ready;
1 <= line;
line <= count
do
Result := text.item(line);
ensure
Result /= Void
end;
feature {NONE}
make is
do
end;
text: FIXED_ARRAY[STRING] is
-- To store the complete file to parse. Each line
-- is one STRING without the '%N' end-of-line mark.
once
!!Result.with_capacity(4096);
end;
get_line(i: INTEGER): STRING is
require
i >= 0
do
if i <= text.upper then
Result := text.item(i);
Result.clear;
else
!!Result.make(medium_line_size);
text.add_last(Result);
end;
ensure
Result.empty;
Result.capacity >= medium_line_size;
text.item(i) = Result
end;
medium_line_size: INTEGER is 80;
end -- PARSER_BUFFER