On 02 Oct 96, Frank Adam wrote to Paul Wankadia --



 PW> I tried to automatically determine the maximum string length by using

 PW> int Max_Length = sizeof(String) / sizeof(char);

 PW> because it is an array of char.  What am I doing wrong?

 FA> If the string was declared locally yes it would work, but..

 FA> The function only gets the pointer to the string, it has no idea about

 FA> the length of it, all it knows is that it'll have to put the strng it

 FA> gathers up in the function into the address provided.



What would I have to do?  Use strdup() to duplicate the string locally and

then sizeof() that duplicate string perhaps???



 FA> So sizeof() will return the length of the pointer.



I seem to get 2...



BTW how can I make a pointer to point to a set place in memory (i.e. segment

and offset) ???



 FA> Perhaps if the string is global it may also work, but i didn't try or

 FA> even said that !.:)



What's wrong with global variables? :)



 FA> PS: if portability is not an issue look at heapwalk in Borland, or go



What does heapwalk() do?  (Forgive all these questions -- I only got myself a

compiler earlier this year 



 FA> 2 or 4 bytes (i forget) back from the pointer and you'll find the

 FA> alloced block size somewhere, it only seems to work with the Borland

 FA> RTL..



What's RTL?  BTW I'd rather keep the code as portable as possible (between

PC compilers anyway), so that's not an option really...



Chow.



Junyer Hakker.



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