/*
* lftp - file transfer program
*
* Copyright (c) 1996-2012 by Alexander V. Lukyanov (lav@yars.free.net)
*
* 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 3 of the License, or
* (at your option) any later version.
*
* This program 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 program. If not, see .
*/
#ifndef IDNAMECACHE_H
#define IDNAMECACHE_H
#include "SMTask.h"
#include "Timer.h"
#include "StringPool.h"
struct IdNamePair
{
int id;
const char *name;
IdNamePair *next;
IdNamePair(int id1,const char *name1) { id=id1; name=StringPool::Get(name1); }
IdNamePair(const IdNamePair *p) { id=p->id; name=StringPool::Get(p->name); }
};
class IdNameCache : public SMTask
{
Ref expire_timer;
enum { table_size=131 };
unsigned hash(const char *);
unsigned hash(int);
IdNamePair *table_id[table_size];
IdNamePair *table_name[table_size];
void init();
void free();
static void free_list(IdNamePair *list);
void add(unsigned h,IdNamePair **,IdNamePair *);
protected:
virtual IdNamePair *get_record(int id)=0;
virtual IdNamePair *get_record(const char *name);
IdNamePair *lookup(int id);
IdNamePair *lookup(const char *id);
public:
IdNameCache();
virtual ~IdNameCache();
void Clear() { free(); init(); }
const char *Lookup(int id);
int Lookup(const char *);
void SetExpireTimer(Timer *t) { expire_timer=t; }
int Do();
};
class PasswdCache : public IdNameCache
{
static PasswdCache *instance;
static PasswdCache *GetInstance();
IdNamePair *get_record(int id);
IdNamePair *get_record(const char *name);
public:
static int LookupS(const char *name) { return GetInstance()->Lookup(name); }
static const char *LookupS(int id) { return GetInstance()->Lookup(id); }
~PasswdCache();
static void DeleteInstance() { Delete(instance); }
};
class GroupCache : public IdNameCache
{
static GroupCache *instance;
static GroupCache *GetInstance();
IdNamePair *get_record(int id);
IdNamePair *get_record(const char *name);
public:
static int LookupS(const char *name) { return GetInstance()->Lookup(name); }
static const char *LookupS(int id) { return GetInstance()->Lookup(id); }
~GroupCache();
static void DeleteInstance() { Delete(instance); }
};
inline void IdNameCacheCleanup()
{
PasswdCache::DeleteInstance();
GroupCache::DeleteInstance();
}
#endif