substring.h
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上传日期:2013-07-25
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- #ifndef SUBSTRING_H_
- #define SUBSTRING_H_
- /* ====================================================================
- * The Vovida Software License, Version 1.0
- *
- * Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The names "VOCAL", "Vovida Open Communication Application Library",
- * and "Vovida Open Communication Application Library (VOCAL)" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact vocal@vovida.org.
- *
- * 4. Products derived from this software may not be called "VOCAL", nor
- * may "VOCAL" appear in their name, without prior written
- * permission of Vovida Networks, Inc.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const substringHeaderVersion =
- "$Id: substring.h,v 1.13 2001/06/27 01:43:45 bko Exp $";
- #include <string>
- class substring
- {
- public:
- substring()
- :
- myString(0),
- start(string::npos),
- myLen(0)
- {}
- substring(const string& str)
- :
- myString(const_cast < string* > (&str)),
- start(0),
- myLen(str.length())
- {}
- substring(const string* str, string::size_type i, string::size_type n)
- :
- myString(const_cast < string* > (str)),
- start(i),
- myLen(n)
- {}
- substring(const substring& x)
- :
- myString(x.myString),
- start(x.start),
- myLen(x.myLen)
- {}
- substring(const substring& x, string::size_type i, string::size_type n)
- :
- myString(x.myString),
- start(x.start + i),
- myLen(n)
- {}
- substring& operator= (const substring& x)
- {
- this->myString = x.myString;
- this->start = x.start;
- this->myLen = x.myLen;
- return *this;
- }
- bool operator== (const string& x) const
- {
- if (!myString)
- {
- return false;
- }
- else
- {
- return myString->substr(start, myLen) == x;
- }
- }
- bool operator== (const char* x) const
- {
- if (!myString)
- {
- return false;
- }
- else
- {
- return myString->substr(start, myLen) == x;
- }
- }
- string str() const
- {
- return myString->substr(start, myLen);
- }
- friend ostream& operator<<(ostream& s, const substring& x)
- {
- return s << x.str();
- }
- char operator[](string::size_type i)
- {
- return (*myString)[i + start];
- }
- const char operator[](string::size_type i) const
- {
- return (*myString)[i + start];
- }
- #ifndef WIN32
- const char* c_str(void) const
- {
- return myString->substr(start, myLen).c_str();
- }
- #endif
- string::size_type length() const
- {
- return myLen;
- }
- string::size_type getStart() const
- {
- return start;
- }
- private:
- string* myString;
- string::size_type start;
- string::size_type myLen;
- };
- #endif