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----------------------------------------------------------------------------
--
-- Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-- Contact: Nokia Corporation (qt-info@nokia.com)
--
-- This file is part of the QtCore module of the Qt Toolkit.
--
-- $QT_BEGIN_LICENSE:LGPL$
-- No Commercial Usage
-- This file contains pre-release code and may not be distributed.
-- You may use this file in accordance with the terms and conditions
-- contained in the Technology Preview License Agreement accompanying
-- this package.
--
-- 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, Nokia gives you certain
-- additional rights. These rights are described in the Nokia Qt LGPL
-- Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
-- package.
--
-- If you have questions regarding the use of this file, please contact
-- Nokia at qt-info@nokia.com.
--
--
--
--
--
--
--
--
-- $QT_END_LICENSE$
--
----------------------------------------------------------------------------
%parser XMLTable
%impl xmlreader.cpp
%token LEFT_ANGLE
%token RIGHT_ANGLE
%token ANY
%start XmlStream
/.
#ifndef XMLREADER_H
#define XMLREADER_H
#include <QtCore>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include "$header"
class XMLReader: protected $table
{
public:
XMLReader(const QByteArray &bytes);
~XMLReader();
bool parse();
inline int nextToken()
{
switch (*bufptr++) {
case '\0':
return EOF_SYMBOL;
case '<':
in_tag = true;
return LEFT_ANGLE;
case '>':
if (! in_tag)
break;
in_tag = false;
return RIGHT_ANGLE;
break;
} // switch
return ANY;
}
protected:
inline void reallocateStack();
inline int &sym(int index)
{ return stack [tos + index - 1].ival; }
protected:
int tos;
int stack_size;
struct StackItem {
int state;
int ival;
};
QVarLengthArray<StackItem> stack;
unsigned in_tag: 1;
QByteArray bytes;
const char *bufptr;
};
inline void XMLReader::reallocateStack()
{
if (! stack_size)
stack_size = 128;
else
stack_size <<= 1;
stack.resize (stack_size);
}
#endif // XMLREADER_H
XMLReader::XMLReader(const QByteArray &bytes):
tos(0),
stack_size(0),
bytes(bytes)
{
bufptr = bytes.constData();
}
XMLReader::~XMLReader()
{
}
bool XMLReader::parse()
{
const int INITIAL_STATE = 0;
in_tag = 0;
bufptr = bytes.constData();
int yytoken = -1;
reallocateStack();
tos = 0;
stack [++tos].state = INITIAL_STATE;
while (true)
{
const int state = stack [tos].state;
if (yytoken == -1 && - TERMINAL_COUNT != action_index [state])
yytoken = nextToken();
int act = t_action (state, yytoken);
if (act == ACCEPT_STATE)
return true;
else if (act > 0)
{
if (++tos == stack_size)
reallocateStack();
stack [tos].ival = *bufptr; // ### save the token value here
stack [tos].state = act;
yytoken = -1;
}
else if (act < 0)
{
int r = - act - 1;
tos -= rhs [r];
act = stack [tos++].state;
switch (r) {
./
XmlStream: TagOrWord ;
XmlStream: XmlStream TagOrWord ;
TagOrWord: Tag ;
TagOrWord: ANY ;
Tag: LEFT_ANGLE TagName RIGHT_ANGLE ;
/.
case $rule_number: {
fprintf (stderr, "*** found a tag\n");
} break;
./
TagName: ANY ;
TagName: TagName ANY ;
/.
} // switch
stack [tos].state = nt_action (act, lhs [r] - TERMINAL_COUNT);
}
else
{
// ### ERROR RECOVERY HERE
break;
}
}
return false;
}
/////////////////////////////
// entry point
/////////////////////////////
int main(int, char *argv[])
{
QFile f (argv[1]);
if (f.open(QFile::ReadOnly)) {
QByteArray contents = f.readAll();
XMLReader parser (contents);
if (parser.parse())
printf ("OK\n");
else
printf ("KO\n");
}
}
./
|
