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tdenetwork/kfile-plugins/torrent/bdict.cpp

221 lines
5.1 KiB

/*
* Copyright (c) 2003, 2004 Michael Pyne <michael.pyne@kdemail.net>
*
* This software is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; see the file COPYING.
* If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <qstringlist.h>
#include <qiodevice.h>
#include <kdebug.h>
#include "bbase.h"
#include "bdict.h"
#include "bstring.h"
#include "bint.h"
#include "blist.h"
BDict::BDict (QByteArray &dict, int start)
: m_map(), m_valid(false)
{
ByteTape tape(dict, start);
init (tape);
}
BDict::BDict (ByteTape &tape)
: m_map(), m_valid (false)
{
init (tape);
}
void BDict::init (ByteTape &tape)
{
if (*tape != 'd')
{
kdDebug(7034) << "This isn't a dictionary!" << endl;
return; // This isn't a dictionary
}
tape++;
// We need to loop and read in a string, then read in some data
while (*tape != 'e')
{
BBase *temp_item = 0;
// Read in string
KSharedPtr<BString> str (new BString (tape));
// Ensure str will be automatically deleted
if (!str || !str->isValid())
{
kdDebug(7034) << (str ? "Invalid string" : "Unable to read String!") << endl;
return;
}
// Read in data
switch (*tape)
{
case 'l':
temp_item = new BList (tape);
break;
case 'i':
temp_item = new BInt (tape);
break;
case 'd':
temp_item = new BDict (tape);
break;
default:
// Hopefully this is a string
temp_item = new BString (tape);
}
if (!temp_item || !temp_item->isValid())
{
kdDebug(7034) << (temp_item ? "Invalid item!"
: "Unable to create keyed data!") << endl;
return;
}
m_map.insert(str->get_string(), temp_item);
}
// Move past the 'e'
tape++;
// Let the map delete the items
m_map.setAutoDelete (true);
// Oh yeah, we're valid now, too. :-)
m_valid = true;
}
BDict::~BDict ()
{
// QDict will take care of deleting each entry that
// it holds.
}
BInt *BDict::findInt (const char *key)
{
BBase *base = find(key);
if (base && base->type_id() == bInt)
return dynamic_cast<BInt*>(base);
return 0;
}
BList *BDict::findList (const char *key)
{
BBase *base = find(key);
if (base && base->type_id() == bList)
return dynamic_cast<BList*>(base);
return 0;
}
BDict *BDict::findDict (const char *key)
{
BBase *base = find(key);
if (base && base->type_id() == bDict)
return dynamic_cast<BDict*>(base);
return 0;
}
BString *BDict::findStr (const char *key)
{
BBase *base = find(key);
if (base && base->type_id() == bString)
return dynamic_cast<BString*>(base);
return 0;
}
bool BDict::writeToDevice(QIODevice &device)
{
if (!isValid())
return false;
const char *d_str = "d";
const char *e_str = "e";
Q_LONG written = 0, result = 0;
written = device.writeBlock (d_str, 1);
while (written < 1)
{
if (written < 0 || result < 0)
return false;
result = device.writeBlock (d_str, 1);
written += result;
}
// Strings are supposed to be written in the dictionary such that
// the keys are in sorted order. QDictIterator doesn't support an
// ordering, so we have to get a list of all the keys, sort it, and
// then go by the list.
BBaseHashIterator iter (m_map);
QStringList key_list;
for ( ; iter.current(); ++iter)
key_list.append(iter.currentKey());
key_list.sort();
QStringList::Iterator key_iter;
for (key_iter = key_list.begin(); key_iter != key_list.end(); ++key_iter)
{
QCString utfString = (*key_iter).utf8();
QString str = QString("%1:").arg(utfString.size() - 1);
QCString lenString = str.utf8();
// Write out length of key
device.writeBlock(lenString.data(), lenString.size() - 1);
// Write out actual key
device.writeBlock(utfString.data(), utfString.size() - 1);
// Write out the key's data
BBase *base = m_map.find(*key_iter);
if (!base->writeToDevice (device))
return false;
}
written = device.writeBlock (e_str, 1);
while ((uint) written < 1)
{
if (written < 0 || result < 0)
return false;
result = device.writeBlock (e_str, 1);
written += result;
}
return true;
}
// vim: set et sw=4 ts=4: