Monday, December 4, 2017

C++17(C11)): Bounds-checking strerror_s() and strerrorlens()

C++17 added the bounds-checking functions strerror_s() and strerrorlens().

#include <iostream>
#include <cerrno>
#include <cstdio>
#include <cstring>
using namespace std;

int main()
  // The following line does not compile on MSVS 2017:
  //   int bufferSize = strerrorlen_s(EINTR) + 1;
  const int bufferSize = FILENAME_MAX;
  char      buffer[bufferSize];

  strerror_s(buffer, bufferSize, EINTR);
  cout << buffer << endl;

  return 0;
// Output: Interrupted function call

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