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Diffstat (limited to 'kfile-plugins/torrent/blist.h')
| -rw-r--r-- | kfile-plugins/torrent/blist.h | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/kfile-plugins/torrent/blist.h b/kfile-plugins/torrent/blist.h new file mode 100644 index 00000000..88a52bc4 --- /dev/null +++ b/kfile-plugins/torrent/blist.h @@ -0,0 +1,200 @@ +/* + * 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., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ +#ifndef _BLIST_H +#define _BLIST_H + +#include <qvaluelist.h> +#include <qcstring.h> +#include "bbase.h" +#include "bytetape.h" + +typedef QValueList<BBase *> BBaseVector; +typedef QValueList<BBase *>::iterator BBaseVectorIterator; + +// Predeclare the following classes +class BDict; +class BString; +class BInt; + +/** + * Class to construct a list of BBase objects from a b-encoded + * list. + * + * @author Michael Pyne <mpyne@grammarian.homelinux.net> + * @see BBase + */ +class BList : public BBase +{ + public: + + /** + * Construct a BList from @p dict. + * + * @param dict the buffer to read from + * @param start the position in the buffer to start + * reading from + */ + BList (QByteArray &dict, unsigned int start = 0); + + /** + * Construct a BList from @p tape. Any changes made to + * @p tape, such as its current position and data, will be + * shared with the object that called this constructor. @p tape + * should already be positioned at the position to read from. + * If construction was successful, @p tape will point to the + * byte after the list data. If construction was unsuccessful, + * the position of the tape is undefined. + * + * @param tape the ByteTape to read from. + */ + BList (ByteTape &tape); + + /** + * Destroys the list, and deletes all of the items that had + * been contained within. + */ + virtual ~BList (); + + /** + * Returns the type of this class. + * + * @return bList. This value is only returned by this class. + */ + virtual classID type_id() const { return bList; } + + /** + * Returns the number of items contained within the list. + * + * @return number of items in the list + */ + virtual unsigned int count() const { return m_array.count(); } + + /** + * This function should be called to determine whether the + * list was successfully created, since no exceptions + * are thrown. + * + * @return true if this is a valid list, false otherwise + */ + virtual bool isValid() const { return m_valid; } + + /** + * This function returns a pointer to the appropriate + * item in the list. + * + * @param i index of the item to return + * @return pointer to the appropriate BBase, or 0 if + * the index is out-of-bounds + */ + inline BBase * index (unsigned int i); + + /** + * Convience function to return a pointer to the appropriate + * item in the list, already casted. + * + * @param i index of the item to return + * @return pointer to the appropriate BBase, downcasted to + * BList. If the element is <b>not</b> a BList, 0 + * will be returned instead, even if it was a valid + * BBase. + */ + BList * indexList (unsigned int i); + + /** + * Convience function to return a pointer to the appropriate + * item in the list, already casted. + * + * @param i index of the item to return + * @return pointer to the appropriate BBase, downcasted to + * BInt. If the element is <b>not</b> a BInt, 0 + * will be returned instead, even if it was a valid + * BBase. + */ + BInt * indexInt (unsigned int i); + + /** + * Convience function to return a pointer to the appropriate + * item in the list, already casted. + * + * @param i index of the item to return + * @return pointer to the appropriate BBase, downcasted to + * BDict. If the element is <b>not</b> a BDict, 0 + * will be returned instead, even if it was a valid + * BBase. + */ + BDict * indexDict (unsigned int i); + + /** + * Convience function to return a pointer to the appropriate + * item in the list, already casted. + * + * @param i index of the item to return + * @return pointer to the appropriate BBase, downcasted to + * BString. If the element is <b>not</b> a BString, 0 + * will be returned instead, even if it was a valid + * BBase. + */ + BString * indexStr (unsigned int i); + + /** + * Returns an iterator to the first element in the list. + * There is no particular sorting associated with the list + * at this time. + * + * @return iterator pointing to the beginning of the list + * @see QValueList + */ + BBaseVectorIterator begin(void) { return m_array.begin(); } + + /** + * Returns an iterator pointing one element past the end of + * the list. Although this element belongs to the list, + * you should never dereference this iterator. Instead, treat + * it as a boundary condition to avoid. + * + * @return iterator pointing one element past the end of the list + * @see QValueList + */ + BBaseVectorIterator end(void) { return m_array.end(); } + + /** + * Outputs the b-encoded representation of the object to the given + * QIODevice. + * @param device the QIODevice to write to + * @return true on a successful write, false otherwise + */ + virtual bool writeToDevice (QIODevice &device); + + private: + + /** + * This function handles the actual initialization of the object upon + * construction, and set the m_valid flag if successful. + * + * @param tape the ByteTape to read from + */ + void init(ByteTape &tape); + + bool m_valid; + BBaseVector m_array; +}; + +#endif /* _BLIST_H */ + +// vim: set et sw=4 ts=4: |