G4Tokenizer.hh

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//
// $Id$
//
// 
//---------------------------------------------------------------
//  GEANT 4 class header file
//
//  G4Tokenizer
//
//  Class description:
//
//  String tokenizer.
//  It derives from the implementation of the Rogue Wave
//  RWTokenizer. It intrinsically uses STL string.

//---------------------------------------------------------------

#ifndef __G4Tokenizer
#define __G4Tokenizer

#include "G4String.hh"

class G4Tokenizer 
{
public:
  G4Tokenizer(const G4String& stn):string2tokenize(stn),actual(0){}

  G4SubString operator()(const char* str=" \t\n",size_t l=0)
    {
      size_t i,j,tmp;
      G4bool hasws=false;
      if(l==0) l=strlen(str);
      //Skip leading delimeters
      while(actual<string2tokenize.size())
        {
          
          for(i=0;i<l;i++)
            if(string2tokenize[actual]==str[i]) hasws=true;
          if(hasws)
            {
              actual++;
              hasws=false;
            }
          else
            break;
        }
          
      for(j=actual;j<string2tokenize.size();j++)
        {
          for(i=0;i<l;i++)
            if(string2tokenize[j]==str[i]) break;
          if(i<l) break;
        }
      if(j!=string2tokenize.size())
        {
          tmp=actual;
          actual=j+1;
          return string2tokenize(tmp,j-tmp);
        }
      else
        {
          tmp=actual;
          actual=j;
          return string2tokenize(tmp,j-tmp);
        }
    } 

private:

  G4String string2tokenize;
  size_t actual;

};

#endif

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