[Qt-interest] indexOf empty substring

[Srikanth Bemineni]

Can you please explain me this
I want to know the defintion of an empty string.

My problem looks like as if i am looking for a zero in one in terms of maths

I havent went through the code of QString.I assume QString would look like
this.

MString
{

MString()
{
   strptr = 0;
   size =0;
}

~MString()
{

}

void operator=( const char* ptr )
{
      int i = strlen(ptr);
      if( i > size )
      {
         delete[] strptr;
         resize( i );
      }

     strncpy( ptr , strptr , i );
     strptr[i+1] = '\0';
}

void resize( int i )
{
    strptr = new char[i + 1];
}

char* strptr;

int size;
};

Not the complete code but in similar lines with other operator
functionality.The solution is I will resize my char buffer as needed.

In Basic C char array is used to store characters
'\0' is represented as a null and every char array ends with a null. Does
QString has null or an unintialized char pointer in the string buffer if is
is empty?.
if we apply this rule assuming that the empty string contians a null empty
char array. Then the  indexOf() should return me the length of the string +1

What does the empty string buffer contain in a QString?

On Tue, Feb 3, 2009 at 10:14 PM, <andrew.m.goth at l-3com.com> wrote:

> Srikanth Bemineni wrote:
> > I want to know why an indexof()  of an empty substring on a
> > string gives me 0.
>
> Every string begins and ends with an empty string, and there is an empty
> string between each pair of adjacent characters.  So an empty string can
> be found anywhere you look for it.
>
> --
> Andy Goth
> <amgoth at link.com>
>
> _______________________________________________
> Qt-interest mailing list
> Qt-interest at trolltech.com
> http://lists.trolltech.com/mailman/listinfo/qt-interest
>



-- 
_/\_
With Regards
SB Angel Warrior
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.qt-project.org/pipermail/qt-interest-old/attachments/20090203/6194d708/attachment.html