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Roberto Raggi authoredRoberto Raggi authored
pp-macro-expander.cpp 12.96 KiB
/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
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**************************************************************************/
#include "pp.h"
#include "pp-cctype.h"
#include "pp-macro-expander.h"
#include <QDateTime>
namespace CPlusPlus {
struct pp_frame
{
Macro *expanding_macro;
const QVector<QByteArray> actuals;
pp_frame(Macro *expanding_macro, const QVector<QByteArray> &actuals)
: expanding_macro (expanding_macro),
actuals (actuals)
{ }
};
} // end of namespace CPlusPlus
using namespace CPlusPlus;
inline static bool comment_p (const char *__first, const char *__last)
{
if (__first == __last)
return false;
if (*__first != '/')
return false;
if (++__first == __last)
return false;
return (*__first == '/' || *__first == '*');
}
MacroExpander::MacroExpander(Environment *env, pp_frame *frame, Client *client, unsigned start_offset)
: env(env), frame(frame),
client(client),
start_offset(start_offset),
lines(0)
{ }
const QByteArray *MacroExpander::resolve_formal(const QByteArray &__name)
{
if (! (frame && frame->expanding_macro))
return 0;
const QVector<QByteArray> formals = frame->expanding_macro->formals();
for (int index = 0; index < formals.size(); ++index) {
const QByteArray formal = formals.at(index);
if (formal == __name && index < frame->actuals.size())
return &frame->actuals.at(index);
}
return 0;
}
const char *MacroExpander::operator()(const char *first, const char *last,
QByteArray *result)
{
return expand(first, last, result);
}
const char *MacroExpander::expand(const char *__first, const char *__last,
QByteArray *__result)
{
const char *start = __first;
__first = skip_blanks (__first, __last);
lines = skip_blanks.lines;
while (__first != __last)
{
if (*__first == '\n')
{
__result->append("\n# ");
__result->append(QByteArray::number(env->currentLine));
__result->append(' ');
__result->append('"');
__result->append(env->currentFile.toUtf8());
__result->append('"');
__result->append('\n');
++lines;
__first = skip_blanks (++__first, __last);
lines += skip_blanks.lines;
if (__first != __last && *__first == '#')
break;
}
else if (*__first == '#')
{
__first = skip_blanks (++__first, __last);
lines += skip_blanks.lines;
const char *end_id = skip_identifier (__first, __last);
const QByteArray fast_name(__first, end_id - __first);
__first = end_id;
if (const QByteArray *actual = resolve_formal (fast_name))
{
__result->append('\"');
const char *actual_begin = actual->constData ();
const char *actual_end = actual_begin + actual->size ();
for (const char *it = skip_whitespaces (actual_begin, actual_end);
it != actual_end; ++it)
{
if (*it == '"' || *it == '\\')
{
__result->append('\\');
__result->append(*it);
}
else if (*it == '\n')
{
__result->append('"');
__result->append('\n');
__result->append('"');
}
else
__result->append(*it);
}
__result->append('\"');
}
else
__result->append('#'); // ### warning message?
}
else if (*__first == '\"')
{
const char *next_pos = skip_string_literal (__first, __last);
lines += skip_string_literal.lines;
__result->append(__first, next_pos - __first);
__first = next_pos;
}
else if (*__first == '\'')
{
const char *next_pos = skip_char_literal (__first, __last);
lines += skip_char_literal.lines;
__result->append(__first, next_pos - __first);
__first = next_pos;
}
else if (comment_p (__first, __last))
{
__first = skip_comment_or_divop (__first, __last);
int n = skip_comment_or_divop.lines;
lines += n;
while (n-- > 0)
__result->append('\n');
}
else if (pp_isspace (*__first))
{
for (; __first != __last; ++__first)
{
if (*__first == '\n' || !pp_isspace (*__first))
break;
}
__result->append(' ');
}
else if (pp_isdigit (*__first))
{
const char *next_pos = skip_number (__first, __last);
lines += skip_number.lines;
__result->append(__first, next_pos - __first);
__first = next_pos;
}
else if (pp_isalpha (*__first) || *__first == '_')
{
const char *name_begin = __first;
const char *name_end = skip_identifier (__first, __last);
__first = name_end; // advance
// search for the paste token const char *next = skip_blanks (__first, __last);
bool paste = false;
if (next != __last && *next == '#')
{
paste = true;
++next;
if (next != __last && *next == '#')
__first = skip_blanks(++next, __last);
}
const QByteArray fast_name(name_begin, name_end - name_begin);
if (const QByteArray *actual = resolve_formal (fast_name))
{
const char *begin = actual->constData ();
const char *end = begin + actual->size ();
if (paste) {
for (--end; end != begin - 1; --end) {
if (! pp_isspace(*end))
break;
}
++end;
}
__result->append(begin, end - begin);
continue;
}
Macro *macro = env->resolve (fast_name);
if (! macro || macro->isHidden() || env->hideNext)
{
if (fast_name.size () == 7 && fast_name [0] == 'd' && fast_name == "defined")
env->hideNext = true;
else
env->hideNext = false;
if (fast_name.size () == 8 && fast_name [0] == '_' && fast_name [1] == '_')
{
if (fast_name == "__LINE__")
{
__result->append(QByteArray::number(env->currentLine + lines));
continue;
}
else if (fast_name == "__FILE__")
{
__result->append('"');
__result->append(env->currentFile.toUtf8());
__result->append('"');
continue;
}
else if (fast_name == "__DATE__")
{
__result->append('"');
__result->append(QDate::currentDate().toString().toUtf8());
__result->append('"');
continue;
}
else if (fast_name == "__TIME__")
{
__result->append('"');
__result->append(QTime::currentTime().toString().toUtf8());
__result->append('"');
continue;
}
}
__result->append(name_begin, name_end - name_begin); continue;
}
if (! macro->isFunctionLike())
{
Macro *m = 0;
if (! macro->definition().isEmpty())
{
macro->setHidden(true);
QByteArray __tmp;
__tmp.reserve (256);
MacroExpander expand_macro (env);
expand_macro(macro->definition(), &__tmp);
if (! __tmp.isEmpty ())
{
const char *__tmp_begin = __tmp.constBegin();
const char *__tmp_end = __tmp.constEnd();
const char *__begin_id = skip_whitespaces (__tmp_begin, __tmp_end);
const char *__end_id = skip_identifier (__begin_id, __tmp_end);
if (__end_id == __tmp_end)
{
const QByteArray __id (__begin_id, __end_id - __begin_id);
m = env->resolve (__id);
}
if (! m)
*__result += __tmp;
}
macro->setHidden(false);
}
if (! m)
continue;
macro = m;
}
// function like macro
const char *arg_it = skip_whitespaces (__first, __last);
if (arg_it == __last || *arg_it != '(')
{
__result->append(name_begin, name_end - name_begin);
lines += skip_whitespaces.lines;
__first = arg_it;
continue;
}
QVector<QByteArray> actuals;
QVector<MacroArgumentReference> actuals_ref;
actuals.reserve (5);
++arg_it; // skip '('
MacroExpander expand_actual (env, frame);
const char *arg_end = skip_argument_variadics (actuals, macro, arg_it, __last);
if (arg_it != arg_end)
{
actuals_ref.append(MacroArgumentReference(start_offset + (arg_it-start), arg_end - arg_it));
const QByteArray actual (arg_it, arg_end - arg_it);
QByteArray expanded;
expand_actual (actual.constBegin (), actual.constEnd (), &expanded);
actuals.push_back (expanded);
arg_it = arg_end; }
while (arg_it != __last && *arg_end == ',')
{
++arg_it; // skip ','
arg_end = skip_argument_variadics (actuals, macro, arg_it, __last);
actuals_ref.append(MacroArgumentReference(start_offset + (arg_it-start), arg_end - arg_it));
const QByteArray actual (arg_it, arg_end - arg_it);
QByteArray expanded;
expand_actual (actual.constBegin (), actual.constEnd (), &expanded);
actuals.push_back (expanded);
arg_it = arg_end;
}
if (! (arg_it != __last && *arg_it == ')'))
return __last;
++arg_it; // skip ')'
__first = arg_it;
pp_frame frame (macro, actuals);
MacroExpander expand_macro (env, &frame);
macro->setHidden(true);
expand_macro (macro->definition(), __result);
macro->setHidden(false);
}
else
__result->append(*__first++);
}
return __first;
}
const char *MacroExpander::skip_argument_variadics (QVector<QByteArray> const &__actuals,
Macro *__macro,
const char *__first, const char *__last)
{
const char *arg_end = skip_argument (__first, __last);
while (__macro->isVariadic() && __first != arg_end && arg_end != __last && *arg_end == ','
&& (__actuals.size () + 1) == __macro->formals().size ())
{
arg_end = skip_argument (++arg_end, __last);
}
return arg_end;
}