Function CEscape

be/src/gutil/strings/escaping.cc:584–591

---------------------------------------------------------------------- CEscape() CHexEscape() Utf8SafeCEscape() Utf8SafeCHexEscape() Copies 'src' to result, escaping dangerous characters using C-style escape sequences. This is very useful for preparing query flags. 'src' and 'dest' should not overlap. The 'Hex' version hexadecimal rather than octal sequences. The 'Utf8Safe' version doesn't touch U

//    Currently only \n, \r, \t, ", ', \ and !ascii_isprint() chars are escaped.
// ----------------------------------------------------------------------
string CEscape(const StringPiece& src) {
  const int dest_length = src.size() * 4 + 1;  // Maximum possible expansion
  unique_ptr<char[]> dest(new char[dest_length]);
  const int len = CEscapeInternal(src.data(), src.size(),
                                  dest.get(), dest_length, false, false);
  DCHECK_GE(len, 0);
  return string(dest.get(), len);
}

string CHexEscape(const StringPiece& src) {
  const int dest_length = src.size() * 4 + 1;  // Maximum possible expansion