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/*
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* lftp - file transfer program
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*
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* Copyright (c) 1996-2012 by Alexander V. Lukyanov (lav@yars.free.net)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef IDNAMECACHE_H
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#define IDNAMECACHE_H
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#include "SMTask.h"
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#include "Timer.h"
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#include "StringPool.h"
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struct IdNamePair
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{
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int id;
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const char *name;
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IdNamePair *next;
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IdNamePair(int id1,const char *name1) { id=id1; name=StringPool::Get(name1); }
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IdNamePair(const IdNamePair *p) { id=p->id; name=StringPool::Get(p->name); }
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};
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class IdNameCache : public SMTask
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{
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Ref<Timer> expire_timer;
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enum { table_size=131 };
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unsigned hash(const char *);
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unsigned hash(int);
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IdNamePair *table_id[table_size];
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IdNamePair *table_name[table_size];
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void init();
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void free();
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static void free_list(IdNamePair *list);
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void add(unsigned h,IdNamePair **,IdNamePair *);
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protected:
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virtual IdNamePair *get_record(int id)=0;
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virtual IdNamePair *get_record(const char *name);
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IdNamePair *lookup(int id);
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IdNamePair *lookup(const char *id);
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public:
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IdNameCache();
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virtual ~IdNameCache();
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void Clear() { free(); init(); }
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const char *Lookup(int id);
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int Lookup(const char *);
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void SetExpireTimer(Timer *t) { expire_timer=t; }
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int Do();
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};
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class PasswdCache : public IdNameCache
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{
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static PasswdCache *instance;
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static PasswdCache *GetInstance();
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IdNamePair *get_record(int id);
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IdNamePair *get_record(const char *name);
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public:
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static int LookupS(const char *name) { return GetInstance()->Lookup(name); }
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static const char *LookupS(int id) { return GetInstance()->Lookup(id); }
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~PasswdCache();
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static void DeleteInstance() { Delete(instance); }
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};
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class GroupCache : public IdNameCache
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{
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static GroupCache *instance;
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static GroupCache *GetInstance();
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IdNamePair *get_record(int id);
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IdNamePair *get_record(const char *name);
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public:
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static int LookupS(const char *name) { return GetInstance()->Lookup(name); }
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static const char *LookupS(int id) { return GetInstance()->Lookup(id); }
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~GroupCache();
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static void DeleteInstance() { Delete(instance); }
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};
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inline void IdNameCacheCleanup()
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{
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PasswdCache::DeleteInstance();
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GroupCache::DeleteInstance();
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}
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#endif
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