max size of std::string

[sachin]

what is the maximum number of characters std string can hold ?
my Program is crashed in assign statement when i fed him character buffer of
size 2195

[Giovanni Dicanio]

"sachin" <sac...@discussions.microsoft.com> ha scritto nel messaggio
news:E92EE0C1-A3F9-420A...@microsoft.com...

You must have some other problem elsewhere...

This code shows how you can build a big char buffer (5000 chars) and safely
assign it to a STL string:

<code>

#include <iostream>
#include <string>

using std::string;
using std::cout;
using std::endl;

int main()
{
//
// Allocate a big buffer of char's and fill it with 'x's
//
const int len = 5000;
char * bigString = new char[len];
for (int i = 0; i < (len-1); i++)
{
bigString[i] = 'x';
}
bigString[len - 1] = '\0';

//
// Copy to a STL std::string
//
string s = bigString;

// Print
cout << s.c_str() << endl;

// Cleanup
delete [] bigString;

return 0;
}

</code>

Giovanni

[Giovanni Dicanio]

"Giovanni Dicanio" <giovanniD...@REMOVEMEgmail.com> ha scritto nel
messaggio news:OAow1vHg...@TK2MSFTNGP03.phx.gbl...

>
> "sachin" <sac...@discussions.microsoft.com> ha scritto nel messaggio
> news:E92EE0C1-A3F9-420A...@microsoft.com...
>> what is the maximum number of characters std string can hold ?
>> my Program is crashed in assign statement when i fed him character buffer
>> of
>> size 2195
>
> You must have some other problem elsewhere...

For example, make sure that you put an end of string ('\0') at the end of
your buffer...

Giovanni

[David Wilkinson]

sachin:

Maximum length of std::string is one less than the maximum value of the size_t
type, which is 2^32 (2^64 on 64 bit systems).

Use std::string::max_size() to check.

--
David Wilkinson
Visual C++ MVP

[sachin]

thanks for quick replies .. it was useful
i have my buffer null terminated but still my program crashes at the end of
function scope probably because there is some buffer overflow
i will debug and check exact cause and update you all

thansks