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/****************************************************************************
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**
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** Copyright (C) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Script Generator project on Qt Labs.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.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 LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef PP_SCANNER_H
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#define PP_SCANNER_H
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namespace rpp {
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struct pp_skip_blanks
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{
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int lines;
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template <typename _InputIterator>
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_InputIterator operator () (_InputIterator __first, _InputIterator __last)
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{
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lines = 0;
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for (; __first != __last; lines += (*__first != '\n' ? 0 : 1), ++__first)
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{
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if (*__first == '\\')
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{
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_InputIterator __begin = __first;
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++__begin;
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if (__begin != __last && *__begin == '\n')
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++__first;
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else
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break;
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}
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else if (*__first == '\n' || !pp_isspace (*__first))
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break;
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}
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return __first;
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}
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};
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struct pp_skip_whitespaces
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{
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int lines;
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template <typename _InputIterator>
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_InputIterator operator () (_InputIterator __first, _InputIterator __last)
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{
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lines = 0;
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for (; __first != __last; lines += (*__first != '\n' ? 0 : 1), ++__first)
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{
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if (! pp_isspace (*__first))
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break;
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}
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return __first;
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}
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};
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struct pp_skip_comment_or_divop
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{
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int lines;
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template <typename _InputIterator>
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_InputIterator operator () (_InputIterator __first, _InputIterator __last)
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{
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enum {
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MAYBE_BEGIN,
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BEGIN,
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MAYBE_END,
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END,
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IN_COMMENT,
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IN_CXX_COMMENT
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} state (MAYBE_BEGIN);
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lines = 0;
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for (; __first != __last; lines += (*__first != '\n' ? 0 : 1), ++__first)
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{
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switch (state)
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{
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default:
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assert (0);
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break;
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case MAYBE_BEGIN:
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if (*__first != '/')
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return __first;
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state = BEGIN;
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break;
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case BEGIN:
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if (*__first == '*')
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state = IN_COMMENT;
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else if (*__first == '/')
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state = IN_CXX_COMMENT;
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else
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return __first;
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break;
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case IN_COMMENT:
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if (*__first == '*')
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state = MAYBE_END;
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break;
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case IN_CXX_COMMENT:
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if (*__first == '\n')
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return __first;
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break;
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case MAYBE_END:
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if (*__first == '/')
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state = END;
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else if (*__first != '*')
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state = IN_COMMENT;
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break;
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case END:
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return __first;
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}
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}
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return __first;
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}
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};
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struct pp_skip_identifier
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{
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int lines;
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template <typename _InputIterator>
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_InputIterator operator () (_InputIterator __first, _InputIterator __last)
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{
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lines = 0;
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for (; __first != __last; lines += (*__first != '\n' ? 0 : 1), ++__first)
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{
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if (! pp_isalnum (*__first) && *__first != '_')
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break;
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}
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return __first;
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}
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};
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struct pp_skip_number
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{
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int lines;
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template <typename _InputIterator>
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_InputIterator operator () (_InputIterator __first, _InputIterator __last)
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{
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lines = 0;
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for (; __first != __last; lines += (*__first != '\n' ? 0 : 1), ++__first)
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{
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if (! pp_isalnum (*__first) && *__first != '.')
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break;
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}
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return __first;
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}
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};
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struct pp_skip_string_literal
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{
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int lines;
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template <typename _InputIterator>
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_InputIterator operator () (_InputIterator __first, _InputIterator __last)
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{
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enum {
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BEGIN,
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IN_STRING,
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QUOTE,
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END
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} state (BEGIN);
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lines = 0;
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for (; __first != __last; lines += (*__first != '\n' ? 0 : 1), ++__first)
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{
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switch (state)
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{
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default:
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assert (0);
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break;
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case BEGIN:
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if (*__first != '\"')
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return __first;
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state = IN_STRING;
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break;
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case IN_STRING:
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assert (*__first != '\n');
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if (*__first == '\"')
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state = END;
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else if (*__first == '\\')
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state = QUOTE;
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break;
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case QUOTE:
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state = IN_STRING;
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break;
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case END:
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return __first;
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}
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}
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return __first;
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}
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};
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struct pp_skip_char_literal
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{
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int lines;
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template <typename _InputIterator>
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_InputIterator operator () (_InputIterator __first, _InputIterator __last)
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{
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enum {
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BEGIN,
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IN_STRING,
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QUOTE,
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END
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} state (BEGIN);
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lines = 0;
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for (; state != END && __first != __last; lines += (*__first != '\n' ? 0 : 1), ++__first)
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{
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switch (state)
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{
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default:
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assert (0);
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break;
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case BEGIN:
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if (*__first != '\'')
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return __first;
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state = IN_STRING;
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break;
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case IN_STRING:
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assert (*__first != '\n');
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if (*__first == '\'')
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state = END;
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else if (*__first == '\\')
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state = QUOTE;
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break;
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case QUOTE:
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state = IN_STRING;
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break;
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}
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}
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return __first;
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}
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};
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struct pp_skip_argument
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{
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pp_skip_identifier skip_number;
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pp_skip_identifier skip_identifier;
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pp_skip_string_literal skip_string_literal;
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pp_skip_char_literal skip_char_literal;
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pp_skip_comment_or_divop skip_comment_or_divop;
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int lines;
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template <typename _InputIterator>
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_InputIterator operator () (_InputIterator __first, _InputIterator __last)
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{
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int depth = 0;
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lines = 0;
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while (__first != __last)
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{
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if (!depth && (*__first == ')' || *__first == ','))
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break;
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else if (*__first == '(')
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++depth, ++__first;
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else if (*__first == ')')
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--depth, ++__first;
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else if (*__first == '\"')
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{
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__first = skip_string_literal (__first, __last);
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lines += skip_string_literal.lines;
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}
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else if (*__first == '\'')
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{
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__first = skip_char_literal (__first, __last);
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lines += skip_char_literal.lines;
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}
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else if (*__first == '/')
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{
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__first = skip_comment_or_divop (__first, __last);
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lines += skip_comment_or_divop.lines;
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}
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else if (pp_isalpha (*__first) || *__first == '_')
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{
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__first = skip_identifier (__first, __last);
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lines += skip_identifier.lines;
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}
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else if (pp_isdigit (*__first))
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{
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__first = skip_number (__first, __last);
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lines += skip_number.lines;
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}
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else if (*__first == '\n')
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{
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++__first;
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++lines;
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}
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else
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++__first;
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}
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return __first;
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}
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};
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} // namespace rpp
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#endif // PP_SCANNER_H
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// kate: space-indent on; indent-width 2; replace-tabs on;
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