You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
124 lines
3.4 KiB
124 lines
3.4 KiB
/* This file is part of the KDE libraries
|
|
* Copyright (C) 1999 Waldo Bastian <bastian@kde.org>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License version 2 as published by the Free Software Foundation;
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public License
|
|
* along with this library; see the file COPYING.LIB. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
**/
|
|
|
|
#ifndef __ksycocadict_h__
|
|
#define __ksycocadict_h__
|
|
|
|
#include <tqstring.h>
|
|
#include <tqvaluelist.h>
|
|
#include <tqdatastream.h>
|
|
#include "tdelibs_export.h"
|
|
|
|
class KSycocaEntry;
|
|
class KSycocaDictStringList;
|
|
|
|
/**
|
|
* @internal
|
|
* Hash table implementation for the sycoca database file
|
|
*/
|
|
class TDECORE_EXPORT KSycocaDict
|
|
{
|
|
public:
|
|
/**
|
|
* Create an empty dict, for building the database
|
|
*/
|
|
KSycocaDict();
|
|
/**
|
|
* Create a dict from an existing database
|
|
*/
|
|
KSycocaDict(TQDataStream *str, int offset);
|
|
|
|
~KSycocaDict();
|
|
|
|
/**
|
|
* Adds a 'payload' to the dictionary with key 'key'.
|
|
*
|
|
* 'payload' should have a valid offset by the time
|
|
* the dictionary gets saved.
|
|
**/
|
|
void add(const TQString &key, KSycocaEntry *payload);
|
|
|
|
/**
|
|
* Removes the 'payload' from the dictionary with key 'key'.
|
|
*
|
|
* Not very fast, use with care O(N)
|
|
**/
|
|
void remove(const TQString &key);
|
|
|
|
/**
|
|
* Looks up an entry identified by 'key'.
|
|
*
|
|
* If 0 is returned, no matching entry exists.
|
|
* Otherwise, the offset of the entry is returned.
|
|
*
|
|
* NOTE: It is not guaranteed that this entry is
|
|
* indeed the one you were looking for.
|
|
* After loading the entry you should check that it
|
|
* indeed matches the search key. If it doesn't
|
|
* then no matching entry exists.
|
|
*/
|
|
int find_string(const TQString &key );
|
|
|
|
/**
|
|
* The number of entries in the dictionary.
|
|
*
|
|
* Only valid when building the database.
|
|
*/
|
|
uint count();
|
|
|
|
/**
|
|
* Reset the dictionary.
|
|
*
|
|
* Only valid when building the database.
|
|
*/
|
|
void clear();
|
|
|
|
/**
|
|
* Save the dictionary to the stream
|
|
* A reasonable fast hash algorithm will be created.
|
|
*
|
|
* Typically this will find 90% of the entries directly.
|
|
* Average hash table size: nrOfItems * 20 bytes.
|
|
* Average duplicate list size: nrOfItms * avgKeyLength / 5.
|
|
*
|
|
* Unknown keys have an average 20% chance to give a false hit.
|
|
* (That's why your program should check the result)
|
|
*
|
|
* Example:
|
|
* Assume 1000 items with an average key length of 60 bytes.
|
|
*
|
|
* Approx. 900 items will hash directly to the right entry.
|
|
* Approx. 100 items require a lookup in the duplicate list.
|
|
*
|
|
* The hash table size will be approx. 20Kb.
|
|
* The duplicate list size will be approx. 12Kb.
|
|
**/
|
|
void save(TQDataStream &str);
|
|
|
|
protected:
|
|
TQ_UINT32 hashKey( const TQString &);
|
|
private:
|
|
KSycocaDictStringList *d;
|
|
TQDataStream *mStr;
|
|
TQ_INT32 mOffset;
|
|
TQ_UINT32 mHashTableSize;
|
|
TQValueList<TQ_INT32> mHashList;
|
|
};
|
|
|
|
#endif
|