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C:/temp/src/j2k/Deprecated/old_18mar_diff/Str14dec/SubString.cpp

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#ifndef __J2K__JSubString_CPP__
#define __J2K__JSubString_CPP__

#include <j2k/Fred/String/String.hpp>
#include <j2k/Fred/String/SubString.hpp>

class JString;

class JSubString {
private:
  JSubString()
    : startpos( 0 ), length( 0 ), pData( strNull ) { }

  JSubString( JString* p )
    : startpos( 0 ), length( 0 ), pData( strNull )
  {
    if ( p != NULL ) {
      pData  = p;
      pData->Inc();
      length = p->length;
    }
  }

  JSubString( JString* p, ULONG start )
    : startpos( 0 ), length( 0 ), pData( strNull )
  {
    if ( p != NULL ) {
      pData    = p;
      pData->Inc();
      length   = p->length;
      startpos = start;
    }
  }

  JSubString( JString* p, ULONG start, ULONG len )
    : startpos( 0 ), length( 0 ), pData( strNull )
  {
    if ( p != NULL ) {
      pData    = p;
      pData->Inc();
      startpos = start;

      ULONG l = p->length;
      if ( l >= len ) {
        length = len;
      } else {
        length = l;
      }
    }
  }

  JSubString( const JSubString& src )
    : pData( src.pData ), startpos( src.startpos ), length( src.length )
  {
    pData->Inc();
  }

public:

  // We want to modify JSubString !
  const JSubString& JSubString::operator=( const JString& src )
  {
  }

  JString JSubString::operator=( const JSubString& src )
  {
    ULONG sz = src.length + pData->length;
    JStringData* sd = pData;

    pData = new JStringData( sd->data, sz );

    char* d =     pData->data +     startpos;
    char* s = src.pData->data + src.startpos;

    memcpy( d, s, src.length );

    d += src.length;
    s =  sd->data + startpos + length;
    

    memcpy( d, s, 

    sd->Dec();
  }

  JString operator JString ()
  {
    return JString( pData );
  }

private:
  JStringData*  pData;
  ULONG         startpos;
  ULONG         length;

  friend JString;
};

#endif

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