/usr/include/dclib-0.3/dclib/core/cstringlist.h is in libdc-dev 0.3.24~svn3121-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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cstringlist.h - description
-------------------
begin : Sat Jun 1 2002
copyright : (C) 2002-2003 by Mathias Küster
email : mathen@users.berlios.de
***************************************************************************/
/***************************************************************************
* *
* This program 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. *
* *
***************************************************************************/
#ifndef CSTRINGLIST_H
#define CSTRINGLIST_H
/**
*@author Mathias Küster
*
* Turned into a template class by Edward Sheldrake,
* which makes the downloadmanager code a hell of a lot clearer.
*
* However this class and CList should still be removed entirely and replaced
* with more appropriate STL classes (map, set, unordered_map).
*
* CStringList is a mapping class, not a list of strings. It is implemented
* by containing lists per first key character. To handle more characters
* of the key, the maxdepth parameter can be used, then it will contain
* as many levels of CStringLists as necessary, each level handling
* one character.
*
* CStringList's performance varies depending on how well
* the items distribute, there is no real hash function to make
* sure the items distribute evenly.
*
* The remove without deleting the item function never used to work
* for CStringLists created with maxdepth > 0, the item was always
* deleted. dclib does not require this to work, even if it was fixed.
*/
#include <dclib/dcos.h>
#include <dclib/core/cstring.h>
#include <dclib/core/clist.h>
template<class type> class CStringListObject {
public:
/** */
CStringListObject() {
m_pObject = 0;
};
/** */
~CStringListObject() {};
/** */
CString m_s;
/** */
type * m_pObject;
};
template<class type> class CStringList {
public:
/** */
CStringList( int maxdepth = 0, int depth = 0 );
/** */
~CStringList();
/** */
int Add( const CString & s, type * object = 0 );
/** */
int Get( const CString & s, type ** object );
/** */
int Del( const CString & s, bool bdelobj = true );
/** */
int Remove( const CString & s ) { return Del(s,false); };
/** */
void Clear();
/** */
long Count() const;
/** */
int Next( type ** object );
/** */
int Next( CString & s, type ** object );
private:
/** */
int m_nDepth;
/** */
int m_nMaxDepth;
/** */
long m_nSize;
/** */
long m_nCachePos;
/** */
CStringListObject<type> * m_nCacheObj;
/** */
CStringList<type> ** m_pStringList;
/** */
CList<CStringListObject<type> > ** m_pList;
};
/** */
template<class type> inline long CStringList<type>::Count() const
{ return m_nSize; }
#define HASH_TABLE_SIZE 0x100
#include <stdio.h>
#include <string.h>
template<class type> CStringList<type>::CStringList( int maxdepth, int depth )
{
m_nDepth = depth;
m_nMaxDepth = maxdepth;
m_nSize = 0;
m_nCachePos = 0;
m_nCacheObj = 0;
m_pList = 0;
m_pStringList = 0;
if ( m_nDepth == m_nMaxDepth )
{
m_pList = new CList<CStringListObject<type> >*[HASH_TABLE_SIZE];
memset(m_pList, 0, HASH_TABLE_SIZE*sizeof(CList<CStringListObject<type> >*));
}
else
{
m_pStringList = new CStringList<type>*[HASH_TABLE_SIZE];
memset(m_pStringList, 0, HASH_TABLE_SIZE*sizeof(CStringList<type>*));
}
}
template<class type> CStringList<type>::~CStringList()
{
Clear();
if ( m_nDepth == m_nMaxDepth )
delete [] m_pList;
else
delete [] m_pStringList;
}
/** */
template<class type> int CStringList<type>::Add( const CString & s, type * object )
{
int i = s.GetHash(m_nDepth);
if ( m_nDepth == m_nMaxDepth )
{
CStringListObject<type> * o = new CStringListObject<type>();
o->m_s = s;
o->m_pObject = object;
if ( m_pList[i] == 0 )
m_pList[i] = new CList<CStringListObject<type> >();
m_pList[i]->Add(o);
}
else
{
if ( m_pStringList[i] == 0 )
m_pStringList[i] = new CStringList<type>(m_nMaxDepth,m_nDepth+1);
m_pStringList[i]->Add(s,object);
}
m_nSize++;
m_nCachePos = 0;
m_nCacheObj = 0;
return 0;
}
/** */
template<class type> int CStringList<type>::Del( const CString & s, bool bdelobj )
{
CStringListObject<type> * o = 0;
int i = s.GetHash(m_nDepth);
if ( m_nDepth == m_nMaxDepth )
{
if ( m_pList[i] == 0 )
return -1;
while( (o=m_pList[i]->Next(o)) != 0 )
{
if ( s == o->m_s )
break;
}
if (!o)
return -1;
m_pList[i]->Remove(o);
if ( bdelobj )
delete o->m_pObject;
delete o;
if (m_pList[i]->Count() == 0 )
{
delete m_pList[i];
m_pList[i]=0;
}
}
else
{
if ( m_pStringList[i] == 0 )
return -1;
m_pStringList[i]->Del(s,bdelobj);
}
m_nSize--;
m_nCachePos = 0;
m_nCacheObj = 0;
return 0;
}
/** */
template<class type> int CStringList<type>::Get( const CString & s, type ** object )
{
CStringListObject<type> * o = 0;
int i = s.GetHash(m_nDepth);
if ( m_nDepth == m_nMaxDepth )
{
if ( !m_pList[i] )
return -1;
while( (o=m_pList[i]->Next(o)) != 0 )
{
if ( s == o->m_s )
break;
}
if (!o)
return -1;
*object = o->m_pObject;
}
else
{
if ( !m_pStringList[i] )
return -1;
return m_pStringList[i]->Get(s,object);
}
return 0;
}
/** */
template<class type> void CStringList<type>::Clear()
{
CStringListObject<type> * o = 0;
int i;
for(i=0;i<HASH_TABLE_SIZE;i++)
{
if ( m_nDepth == m_nMaxDepth )
{
if(m_pList[i])
{
while( (o=m_pList[i]->Next(0)) != 0 )
{
delete o->m_pObject;
o->m_pObject = 0;
m_pList[i]->Del(o);
}
delete m_pList[i];
}
m_pList[i]=0;
}
else
{
if(m_pStringList[i])
delete m_pStringList[i];
m_pStringList[i]=0;
}
}
m_nSize = 0;
m_nCachePos = 0;
m_nCacheObj = 0;
}
/** */
template<class type> int CStringList<type>::Next( type ** object )
{
CString s;
return Next(s,object);
}
/** */
template<class type> int CStringList<type>::Next( CString & s, type ** object )
{
int i;
long l;
CStringListObject<type> * obj=0;
if ( *object == 0 )
{
m_nCachePos = 0;
m_nCacheObj = 0;
}
for(i=0,l=0;(i<HASH_TABLE_SIZE)&&(m_nSize>0);i++)
{
if ( m_nDepth == m_nMaxDepth )
{
if(!m_pList[i])
continue;
// fix cache after del
if ( (*object != 0) && (m_nCacheObj == 0) )
{
obj = 0;
while ( (obj=m_pList[i]->Next(obj)) != 0 )
{
m_nCachePos++;
if ( obj->m_pObject == *object )
{
m_nCacheObj = obj;
break;
}
}
obj = 0;
}
else if ( (l<=m_nCachePos) && ((l+m_pList[i]->Count())>m_nCachePos) )
{
if(l==m_nCachePos)
m_nCacheObj=0;
obj = m_pList[i]->Next(m_nCacheObj);
if ( obj )
s = obj->m_s;
else
printf("WARNING: CStringList::Next nullpointer !\n");
m_nCachePos++;
m_nCacheObj = obj;
break;
}
l+=m_pList[i]->Count();
}
else
{
if(!m_pStringList[i])
continue;
if ( (l<=m_nCachePos) && ((l+m_pStringList[i]->Count())>m_nCachePos) )
{
if(l==m_nCachePos)
*object=0;
m_nCachePos++;
return m_pStringList[i]->Next(object);
}
l+=m_pStringList[i]->Count();
}
}
if ( obj )
*object = obj->m_pObject;
else
*object = 0;
return (obj!=0);
}
#endif
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