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// This file is part of the AspectC++ compiler 'ac++'.
// Copyright (C) 1999-2003 The 'ac++' developers (see aspectc.org)
//
// 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, write to the Free
// Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
// MA 02111-1307 USA
#include "PumaPreprocessor.h"
#include "IncludeGraph.h"
#include "IntroductionUnit.h"
using namespace Puma;
using namespace std;
PumaPreprocessor::PumaPreprocessor (const string &tunit_name, ACConfig &conf, CProject &project) :
_tunit_name (tunit_name), _conf (conf), _project (project), _local_units(_project.err ()),
_cpp (&_project.err (), &_project.unitManager (), &_local_units, cout),
_provider(_cpp), _recorded_tokens (0) {
// scan file
_unit = _project.scanFile (tunit_name.c_str());
if (!_unit)
return;
// prepare C preprocessor
_stream.push (_unit);
_project.unitManager ().init ();
_cpp.macroManager ()->init (_unit->name ());
_cpp.stream (&_stream);
_cpp.configure (_project.config ());
_provider.init ();
// fetch the first token
locate_token ();
}
// return the include graph *after* preprocessing the translation unit
void PumaPreprocessor::get_include_graph (IncludeGraph &include_graph) {
// finally parse the preprocessor syntax tree in order to create an
// include graph of the original source code
include_graph.init (_cpp.syntaxTree());
}
Puma::ErrorStream &PumaPreprocessor::err () const {
return _project.err ();
}
bool PumaPreprocessor::keywords_enabled (Puma::Token *tok) const {
if (!tok)
return false;
Unit *unit = tok->unit ();
while (unit && unit->isMacroExp ()) {
unit = ((MacroUnit*)unit)->CallingUnit ();
}
if (!unit->isFile ()) // TODO: is that case possible?
return false;
if (!_project.isBelow(unit))
return false;
size_t len = strlen (unit->name ());
if (len > 2 && strcmp (unit->name () + (len - 3), ".ah") == 0)
return true;
return _conf.keywords();
}
ACToken PumaPreprocessor::next_token () {
_provider.next ();
ACToken result = locate_token ();
if (_recorded_tokens && result != ACToken::TOK_EOF)
_recorded_tokens->append(*result.get ()->duplicate());
return result;
}
ACToken PumaPreprocessor::curr_token () {
Token *token = _provider.current ();
return ACToken (token, keywords_enabled (token));
}
ACToken PumaPreprocessor::look_ahead (int n) {
TokenProvider::State state = _provider.get_state ();
while (n > 0) {
_provider.next ();
locate_token ();
n--;
}
Token *token = _provider.current ();
_provider.set_state (state);
return ACToken (token, keywords_enabled(token));
}
ACToken PumaPreprocessor::locate_token () {
Token *token;
while ((token = _provider.current ()) && ! token->is_core ()) {
// TODO: handle directives here?
// if (token->is_directive ())
// handle_directive ();
// else
_provider.next ();
}
return ACToken (token, keywords_enabled(token));
}
// functions to record the token stream
void PumaPreprocessor::start_recording () {
if (!_recorded_tokens) {
_recorded_tokens = new Unit;
// _recorded_tokens->name(((Unit*)_jpm.source_unit(curr_token()))->name ());
_recorded_tokens->append(*curr_token().get ()->duplicate());
}
}
Unit *PumaPreprocessor::stop_recording () {
Unit *result = _recorded_tokens;
_recorded_tokens = 0;
return result;
}
FileUnit *PumaPreprocessor::source_unit (ACToken token) {
Unit *unit = token.unit ();
while (unit && unit->isMacroExp ()) {
unit = ((MacroUnit*)unit)->CallingUnit ();
}
// if the 'insert unit' is an 'introduction unit', find the intro target unit
IntroductionUnit *intro_unit = IntroductionUnit::cast (unit);
if (intro_unit) unit = intro_unit->final_target_unit ();
// at this point we must have reached a file unit
if (!unit->isFile ())
return 0;
return (FileUnit*)unit;
}
// check whether a token is located within the files of the project
bool PumaPreprocessor::is_in_project(ACToken token) const {
FileUnit *funit = source_unit(token);
return funit && _project.isBelow(funit);
}
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