76 lines
1.9 KiB
C++
76 lines
1.9 KiB
C++
/*
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*+SNOTICE
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*
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*
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* $XConsortium: Dictionary.hh /main/4 1996/04/21 19:44:36 drk $
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*
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* RESTRICTED CONFIDENTIAL INFORMATION:
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*
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* The information in this document is subject to special
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* restrictions in a confidential disclosure agreement bertween
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* HP, IBM, Sun, USL, SCO and Univel. Do not distribute this
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* document outside HP, IBM, Sun, USL, SCO, or Univel wihtout
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* Sun's specific written approval. This documment and all copies
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* and derivative works thereof must be returned or destroyed at
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* Sun's request.
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*
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* Copyright 1993 Sun Microsystems, Inc. All rights reserved.
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*
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*+ENOTICE
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*/
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#ifndef _DTM_DICTIONARY_HH
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#define _DTM_DICTIONARY_HH
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#include "DtVirtArray.hh"
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class DtMailDictionaryImpl : public DtCPlusPlusAllocator {
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public:
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// The hash_size must be <= 256. Setting to smaller sizes
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// will reduce the memory used by the dictionary, but may increase
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// the hash collisions resulting in slower performance.
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//
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DtMailDictionaryImpl(int hash_size = 256);
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~DtMailDictionaryImpl(void);
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void set(const char * key, const void * value);
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const void * lookup(const char * key);
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void remove(const char * key);
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private:
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struct Entry : public DtCPlusPlusAllocator {
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char * key;
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const void * value;
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};
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typedef DtVirtArray<Entry *> * HashTable_t;
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HashTable_t *_hash_table;
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int _hash_size;
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void *_obj_mutex;
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int hashValue(const char * key);
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void locate(int hash_value, const char * key, Entry ** entry);
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};
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template <class Element>
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class DtMailDictionary : public DtCPlusPlusAllocator {
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public:
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DtMailDictionary(int hash_size = 256) : _dict(hash_size) { }
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~DtMailDictionary(void) { }
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void set(const char * key, const Element value) { _dict.set(key, value); }
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const Element lookup(const char * key) {
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return((const Element)_dict.lookup(key));
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}
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void remove(const char * key) { _dict.remove(key); }
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private:
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DtMailDictionaryImpl _dict;
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};
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#endif
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