forked from qt-creator/qt-creator
Moved the preprocessor.
This commit is contained in:
Roberto Raggi
361
src/libs/cplusplus/pp-macro-expander.cpp
Normal file
361
src/libs/cplusplus/pp-macro-expander.cpp
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@@ -0,0 +1,361 @@
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/***************************************************************************
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**
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** This file is part of Qt Creator
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**
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** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
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**
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** Contact: Qt Software Information (qt-info@nokia.com)
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**
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**
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** Non-Open Source Usage
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**
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** Licensees may use this file in accordance with the Qt Beta Version
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** License Agreement, Agreement version 2.2 provided with the Software or,
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** alternatively, in accordance with the terms contained in a written
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** agreement between you and Nokia.
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**
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** GNU General Public License Usage
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**
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** Alternatively, this file may be used under the terms of the GNU General
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** Public License versions 2.0 or 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the packaging
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** of this file. Please review the following information to ensure GNU
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** General Public Licensing requirements will be met:
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**
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** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
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** http://www.gnu.org/copyleft/gpl.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt GPL Exception
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** version 1.2, included in the file GPL_EXCEPTION.txt in this package.
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**
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***************************************************************************/
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#include "pp.h"
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#include "pp-macro-expander.h"
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#include <QDateTime>
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using namespace CPlusPlus;
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MacroExpander::MacroExpander (Environment &env, pp_frame *frame)
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: env(env), frame(frame),
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lines(0), generated_lines(0)
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{ }
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const QByteArray *MacroExpander::resolve_formal(const QByteArray &__name)
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{
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if (! (frame && frame->expanding_macro))
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return 0;
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const QVector<QByteArray> &formals = frame->expanding_macro->formals;
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for (int index = 0; index < formals.size(); ++index) {
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const QByteArray formal = formals.at(index);
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if (formal == __name && index < frame->actuals.size())
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return &frame->actuals.at(index);
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}
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return 0;
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}
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const char *MacroExpander::operator () (const char *__first, const char *__last,
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QByteArray *__result)
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{
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generated_lines = 0;
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__first = skip_blanks (__first, __last);
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lines = skip_blanks.lines;
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while (__first != __last)
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{
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if (*__first == '\n')
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{
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__result->append("\n# ");
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__result->append(QByteArray::number(env.currentLine));
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__result->append(' ');
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__result->append('"');
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__result->append(env.current_file);
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__result->append('"');
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__result->append('\n');
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++lines;
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__first = skip_blanks (++__first, __last);
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lines += skip_blanks.lines;
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if (__first != __last && *__first == '#')
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break;
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}
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else if (*__first == '#')
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{
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__first = skip_blanks (++__first, __last);
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lines += skip_blanks.lines;
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const char *end_id = skip_identifier (__first, __last);
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const QByteArray fast_name(__first, end_id - __first);
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__first = end_id;
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if (const QByteArray *actual = resolve_formal (fast_name))
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{
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__result->append('\"');
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const char *actual_begin = actual->constData ();
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const char *actual_end = actual_begin + actual->size ();
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for (const char *it = skip_whitespaces (actual_begin, actual_end);
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it != actual_end; ++it)
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{
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if (*it == '"' || *it == '\\')
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{
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__result->append('\\');
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__result->append(*it);
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}
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else if (*it == '\n')
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{
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__result->append('"');
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__result->append('\n');
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__result->append('"');
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}
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else
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__result->append(*it);
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}
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__result->append('\"');
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}
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else
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__result->append('#'); // ### warning message?
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}
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else if (*__first == '\"')
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{
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const char *next_pos = skip_string_literal (__first, __last);
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lines += skip_string_literal.lines;
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__result->append(__first, next_pos - __first);
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__first = next_pos;
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}
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else if (*__first == '\'')
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{
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const char *next_pos = skip_char_literal (__first, __last);
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lines += skip_char_literal.lines;
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__result->append(__first, next_pos - __first);
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__first = next_pos;
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}
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else if (_PP_internal::comment_p (__first, __last))
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{
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__first = skip_comment_or_divop (__first, __last);
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int n = skip_comment_or_divop.lines;
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lines += n;
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while (n-- > 0)
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__result->append('\n');
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}
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else if (pp_isspace (*__first))
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{
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for (; __first != __last; ++__first)
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{
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if (*__first == '\n' || !pp_isspace (*__first))
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break;
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}
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__result->append(' ');
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}
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else if (pp_isdigit (*__first))
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{
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const char *next_pos = skip_number (__first, __last);
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lines += skip_number.lines;
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__result->append(__first, next_pos - __first);
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__first = next_pos;
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}
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else if (pp_isalpha (*__first) || *__first == '_')
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{
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const char *name_begin = __first;
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const char *name_end = skip_identifier (__first, __last);
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__first = name_end; // advance
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// search for the paste token
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const char *next = skip_blanks (__first, __last);
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bool paste = false;
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if (next != __last && *next == '#')
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{
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paste = true;
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++next;
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if (next != __last && *next == '#')
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__first = skip_blanks(++next, __last);
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}
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const QByteArray fast_name(name_begin, name_end - name_begin);
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if (const QByteArray *actual = resolve_formal (fast_name))
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{
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const char *begin = actual->constData ();
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const char *end = begin + actual->size ();
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if (paste) {
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for (--end; end != begin - 1; --end) {
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if (! pp_isspace(*end))
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break;
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}
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++end;
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}
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__result->append(begin, end - begin);
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continue;
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}
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Macro *macro = env.resolve (fast_name);
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if (! macro || macro->hidden || env.hide_next)
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{
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if (fast_name.size () == 7 && fast_name [0] == 'd' && fast_name == "defined")
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env.hide_next = true;
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else
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env.hide_next = false;
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if (fast_name.size () == 8 && fast_name [0] == '_' && fast_name [1] == '_')
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{
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if (fast_name == "__LINE__")
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{
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char buf [16];
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const size_t count = qsnprintf (buf, 16, "%d", env.currentLine + lines);
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__result->append(buf, count);
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continue;
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}
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else if (fast_name == "__FILE__")
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{
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__result->append('"');
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__result->append(env.current_file);
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__result->append('"');
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continue;
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}
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else if (fast_name == "__DATE__")
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{
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__result->append('"');
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__result->append(QDate::currentDate().toString().toUtf8());
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__result->append('"');
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continue;
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}
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else if (fast_name == "__TIME__")
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{
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__result->append('"');
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__result->append(QTime::currentTime().toString().toUtf8());
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__result->append('"');
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continue;
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}
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}
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__result->append(name_begin, name_end - name_begin);
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continue;
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}
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if (! macro->function_like)
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{
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Macro *m = 0;
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if (! macro->definition.isEmpty())
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{
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macro->hidden = true;
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QByteArray __tmp;
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__tmp.reserve (256);
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MacroExpander expand_macro (env);
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expand_macro (macro->definition.constBegin (), macro->definition.constEnd (), &__tmp);
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generated_lines += expand_macro.lines;
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if (! __tmp.isEmpty ())
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{
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const char *__tmp_begin = __tmp.constBegin();
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const char *__tmp_end = __tmp.constEnd();
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const char *__begin_id = skip_whitespaces (__tmp_begin, __tmp_end);
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const char *__end_id = skip_identifier (__begin_id, __tmp_end);
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if (__end_id == __tmp_end)
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{
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const QByteArray __id (__begin_id, __end_id - __begin_id);
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m = env.resolve (__id);
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}
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if (! m)
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*__result += __tmp;
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}
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macro->hidden = false;
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}
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if (! m)
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continue;
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macro = m;
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}
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// function like macro
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const char *arg_it = skip_whitespaces (__first, __last);
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if (arg_it == __last || *arg_it != '(')
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{
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__result->append(name_begin, name_end - name_begin);
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lines += skip_whitespaces.lines;
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__first = arg_it;
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continue;
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}
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QVector<QByteArray> actuals;
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actuals.reserve (5);
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++arg_it; // skip '('
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MacroExpander expand_actual (env, frame);
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const char *arg_end = skip_argument_variadics (actuals, macro, arg_it, __last);
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if (arg_it != arg_end)
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{
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const QByteArray actual (arg_it, arg_end - arg_it);
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QByteArray expanded;
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expand_actual (actual.constBegin (), actual.constEnd (), &expanded);
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actuals.push_back (expanded);
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arg_it = arg_end;
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}
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while (arg_it != __last && *arg_end == ',')
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{
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++arg_it; // skip ','
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arg_end = skip_argument_variadics (actuals, macro, arg_it, __last);
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const QByteArray actual (arg_it, arg_end - arg_it);
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QByteArray expanded;
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expand_actual (actual.constBegin (), actual.constEnd (), &expanded);
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actuals.push_back (expanded);
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arg_it = arg_end;
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}
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if (! (arg_it != __last && *arg_it == ')'))
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return __last;
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++arg_it; // skip ')'
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__first = arg_it;
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pp_frame frame (macro, actuals);
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MacroExpander expand_macro (env, &frame);
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macro->hidden = true;
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expand_macro (macro->definition.constBegin (), macro->definition.constEnd (), __result);
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macro->hidden = false;
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generated_lines += expand_macro.lines;
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}
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else
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__result->append(*__first++);
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}
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return __first;
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}
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const char *MacroExpander::skip_argument_variadics (QVector<QByteArray> const &__actuals,
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Macro *__macro,
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const char *__first, const char *__last)
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{
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const char *arg_end = skip_argument (__first, __last);
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while (__macro->variadics && __first != arg_end && arg_end != __last && *arg_end == ','
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&& (__actuals.size () + 1) == __macro->formals.size ())
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{
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arg_end = skip_argument (++arg_end, __last);
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}
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return arg_end;
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}
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