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String.hpp

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00001 /*==========================================================================
00002  * Copyright (c) 2001 Carnegie Mellon University.  All Rights Reserved.
00003  *
00004  * Use of the Lemur Toolkit for Language Modeling and Information Retrieval
00005  * is subject to the terms of the software license set forth in the LICENSE
00006  * file included with this software, and also available at
00007  * http://www.lemurproject.org/license.html
00008  *
00009  *==========================================================================
00010  */
00011 
00012 
00013 #ifndef _STRINGH_
00014 #define _STRINGH_
00015 
00016 #include "common_headers.hpp"
00017 #include "ByteHash.hpp"
00018 namespace lemur 
00019 {
00020   namespace utility 
00021   {
00022     
00023     class String : public string {
00024     public:
00025       String() : string() {}
00026       String(const char * p) : string(p) {}
00027       String(const string & s) : string(s) {}
00028       String(unsigned int n, char c) : string(n, c) {}
00029 
00030       unsigned int Hash() const { return ByteHash(data(),length(),0); }
00031       unsigned int hash() const { return Hash(); } 
00032       operator const char *() const { return c_str(); }
00033       friend ostream &operator<<(ostream &os, const String &ts);
00034       friend istream &operator>>(istream &is, String &ts);
00035     };
00036     ostream &operator<<(ostream &os, const String &ts);
00037     istream &operator>>(istream &is, String &ts);
00038   }
00039 }
00040 
00041 #endif

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