diff options
Diffstat (limited to 'util/qlalr/examples/dummy-xml/ll/dummy-xml-ll.cpp')
-rw-r--r-- | util/qlalr/examples/dummy-xml/ll/dummy-xml-ll.cpp | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/util/qlalr/examples/dummy-xml/ll/dummy-xml-ll.cpp b/util/qlalr/examples/dummy-xml/ll/dummy-xml-ll.cpp new file mode 100644 index 0000000000..3d2a09c845 --- /dev/null +++ b/util/qlalr/examples/dummy-xml/ll/dummy-xml-ll.cpp @@ -0,0 +1,123 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QLALR module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** 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. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <cstdlib> +#include <cstdio> + +enum Token { + EOF_SYMBOL, + LEFT_ANGLE, + RIGHT_ANGLE, + ANY, +}; + +static int current_char; +static int yytoken; +static bool in_tag = false; + +bool parseXmlStream(); +bool parseTagOrWord(); +bool parseTagName(); + +inline int nextToken() +{ + current_char = fgetc(stdin); + if (current_char == EOF) { + return (yytoken = EOF_SYMBOL); + } else if (current_char == '<') { + in_tag = true; + return (yytoken = LEFT_ANGLE); + } else if (in_tag && current_char == '>') { + in_tag = false; + return (yytoken = RIGHT_ANGLE); + } + return (yytoken = ANY); +} + +bool parse() +{ + nextToken(); + return parseXmlStream(); +} + +bool parseXmlStream() +{ + while (parseTagOrWord()) + ; + + return true; +} + +bool parseTagOrWord() +{ + if (yytoken == LEFT_ANGLE) { + nextToken(); + if (! parseTagName()) + return false; + if (yytoken != RIGHT_ANGLE) + return false; + nextToken(); + + fprintf (stderr, "*** found a tag\n"); + + } else if (yytoken == ANY) { + nextToken(); + } else { + return false; + } + return true; +} + +bool parseTagName() +{ + while (yytoken == ANY) + nextToken(); + + return true; +} + +int main() +{ + if (parse()) + printf("OK\n"); + else + printf("KO\n"); +} |