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StringId.cpp

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//*** StringId.cpp ***/

#include "StringId.h"
#include "StringIdTable.h"

//*** Constructor ***

StringId::StringId():
   idString_(0),
   hash_(0)
   {
   }


//*** Constructor ***

StringId::StringId(const char* idString):
   idString_(0),
   hash_(0)
   {
   // Only initialize if idString is a non-zero pointer, and of non-zero length
   if (idString && idString[0])
      {
      // Calculate hash value for the string
      hash_=StringIdTable::GetInstance().CalculateHash(idString);

      // Do a lookup in the shared table to find this string if it already exists, or
      // to insert it into the shared table if it does not
      idString_=StringIdTable::GetInstance().FindIdString(hash_,idString);
      }
   }


//*** GetString ***

const char* StringId::GetString() const
   {
   return idString_;
   }


//*** GetHash ***

unsigned int StringId::GetHash() const
   { 
   return hash_;
   }


//*** Copy Constructor ***

StringId::StringId(const StringId& stringId)
   {
   idString_=stringId.idString_; 
   hash_=stringId.hash_;
   }


//*** operator = ***

const StringId& StringId::operator=(const StringId& stringId)
   {
   idString_=stringId.idString_;
   hash_=stringId.hash_;
   return *this;
   }


//*** operator == ***

bool StringId::operator==(const StringId& stringId) const
   {
   return idString_==stringId.idString_;
   }


//*** operator != ***

bool StringId::operator!=(const StringId& stringId) const
   {
   return idString_!=stringId.idString_;
   }

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