Re: memory leaks

"Richard Herring" <junk@[127.0.0.1]> ha scritto nel messaggio
news:Vvdt2izrZdXLFweM@baesystems.com...


I am just tring the circular buffer overwritten.

anyway the following code does not work:

#include <windows.h>
#include <vector>
#include <cstdlib>
#include <ctime>
#include <cstdio>
#include <boost/circular_buffer.hpp>
using namespace std;
using namespace boost;

void getDateTime(char * szTime);
const int numbuff = 5;
const int buflen = 30;

struct Buffer
{
public:
 vector<char> vChar;
 int bufferLength;
 int bytesRecorded;
 int user;
 Buffer() : bytesRecorded(0), bufferLength(0), user(0) { };
};

int main()
{
 circular_buffer<Buffer> cb(numbuff);
 circular_buffer<Buffer>::const_iterator it;

 // Insert elements
 for(int i = 0; i<10; i++)
 {
  // Get time
  char szTime[30]; getDateTime(szTime);

  // Init Buff
  Buffer buff;
  copy(&szTime[0],&szTime[30],std::back_inserter(buff.vChar));

  //buff.vChar.assign(szTime, szTime+strlen(szTime));
  buff.bufferLength = buflen;
  buff.bytesRecorded = buflen;
  buff.user = i;

  printf("%d, %d, %s\n", buff.user, buff.bufferLength, szTime);

  cb.push_back(buff);
 }

 // Show elements:
 for(int i = 0; i<(int)cb.size(); i++)
 {
  printf("%d, %d, %s\n", cb[i].user, cb[i].bufferLength, cb[i].vChar);
 }

 system("pause");
 return EXIT_SUCCESS;
}

// getDateTime (Fri, 10 Oct 2008 14:41:59 GMT)
void getDateTime(char * szTime)
{
 time_t rawtime = time(NULL);
 struct tm timeinfo;
 gmtime_s(&timeinfo, &rawtime);
 strftime(szTime, 30, "%a, %d %b %Y %X GMT", &timeinfo);
}

in the second loop I get <null> when I try to print vChar

NB: in the near future I may be deal with unsigned char data so that's why I
cannot have getDateTime() return std::string