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      1 /*
      2  * libjingle
      3  * Copyright 2004--2005, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef _qname_h_
     29 #define _qname_h_
     30 
     31 #include <string>
     32 
     33 namespace buzz {
     34 
     35 
     36 class QName
     37 {
     38 public:
     39   explicit QName();
     40   QName(const QName & qname) : data_(qname.data_) { data_->AddRef(); }
     41   explicit QName(bool add, const std::string & ns, const char * local);
     42   explicit QName(bool add, const std::string & ns, const std::string & local);
     43   explicit QName(const std::string & ns, const char * local);
     44   explicit QName(const std::string & mergedOrLocal);
     45   QName & operator=(const QName & qn) {
     46     qn.data_->AddRef();
     47     data_->Release();
     48     data_ = qn.data_;
     49     return *this;
     50   }
     51   ~QName();
     52 
     53   const std::string & Namespace() const { return data_->namespace_; }
     54   const std::string & LocalPart() const { return data_->localPart_; }
     55   std::string Merged() const;
     56   int Compare(const QName & other) const;
     57   bool operator==(const QName & other) const;
     58   bool operator!=(const QName & other) const { return !operator==(other); }
     59   bool operator<(const QName & other) const { return Compare(other) < 0; }
     60 
     61   class Data {
     62   public:
     63     Data(const std::string & ns, const std::string & local) :
     64       namespace_(ns),
     65       localPart_(local),
     66       refcount_(1) {}
     67 
     68     Data() : refcount_(0) {}
     69 
     70     std::string namespace_;
     71     std::string localPart_;
     72     void AddRef() { refcount_++; }
     73     void Release() { if (!--refcount_) { delete this; } }
     74     bool Occupied() { return !!refcount_; }
     75 
     76   private:
     77     int refcount_;
     78   };
     79 
     80 private:
     81   Data * data_;
     82 };
     83 
     84 
     85 }
     86 
     87 #endif
     88