Re: does std::string have something like CString::GetBuffer?
On May 31, 9:40 am, Kai-Uwe Bux <jkherci...@gmx.net> wrote:
Sam wrote:
sas writes:
c_str doesn't work for me, because it returns a const, i
want to be able to pass the raw zero-terminated buffer to a
C function that changes it, then tell the string object to
update with the new sequence.
There is no equivalent functionality in std::string. You
can achieve the same functionality by using the append()
method to resize the string to the required size, and then
using std::string's iterators to mess around with its
contents.
I know what you're talking about, and there is no direct
equivalent in std::string, and it's a good thing. MFC's
sloppy class design opens many opportunities for coding
errors, like buffer overflows and stack smashing, that leads
to security holes. You will find out that using the C++
library and STL containers correctly leads to good
programming practices that eliminates nearly all
opportunities for coding errors of this nature.
I am not so sure whether std::string is well designed in this
regard. As far as I can see,
str[huge_number] = 'c';
is just as prone to buffer overflows and stack corruption as
anything else.
It's a quality of implementation issue. With the better
implementations I use (g++, VC++), this will cause a program
crash. With the poorer ones, it will corrupt the free space
arena (which also leads to a program crash down the line). I've
never seen an implementation where it would corrupt the stack,
or where it could effectively be used to breech security,
however.
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