Re: realloc vs cstringarray

From:

"Tom Serface" <tom.nospam@camaswood.com>

Newsgroups:

microsoft.public.vc.language

Date:

Thu, 12 Jul 2007 13:40:12 -0700

Message-ID:

<ere7lTMxHHA.424@TK2MSFTNGP06.phx.gbl>

OP might find this conversation (thread) interesting.

http://www.codeguru.com/forum/archive/index.php/t-245373.html

Tom

"John" <John@discussions.microsoft.com> wrote in message
news:5C09127B-3B53-4209-A4F6-6AE5ECE85B6E@microsoft.com...

Hi all,

First Method:
--------------
   char* stringbuff = (char*) calloc(1, sizeof(char));

    for (int i = 1; i <= n/*100000*/; i ++)
   {
         int len = strlen(stringbuff);

         int newstringlen = strlen(GetString(str));

         stringbuff = (char*) realloc(stringbuff,(len+newstringlen+1));
   }

  free(newstringlen);
  newstringlen = NULL;

Second Method:
------------------

Get the "size" of the whole data and all strings into CStringArray in
first
for loop. Create char* buffer on heap using "size". In the second for
loop,
get the strings from CStringArray and copy all the strings into this new
buffer.

  Which is optimized method? If I use realloc, performance hit?

Thansk in advance.

--
Thanks & Regards,
John.