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Non-Compliant Code Example

The following ThIS non-compliant example copies the null-terminated byte string input into the string email, replacing ';' characters with spaces. This example is non-compliant because the iterator loc is invalidated after the first call to insert(). The behavior of subsequent calls to insert is undefined.

char input[] = "bogus@addr.com; cat /etc/passwd";
string email;
string::iterator loc = email.begin();

// copy into string converting ";" to " "
for (size_t i=0; i <= strlen(input); i++) {
  if (input[i] != ';') {
    email.insert(loc++, input[i]);
  }
  else {
    email.insert(loc++, ' ');
  }
} // end string for each element in NTBS

Compliant Solution

In the following thIS compliant solution, the value of the iterator loc is updated as a result of each call to insert so that the insert() method is never called with an invalid iterator. The updated iterator is then incremented at the end of the loop.

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