Function isAnyCharRequiredQuoting

external/jsoncpp/jsoncpp.cpp:4252–4262

String valueToString(bool value) { return value ? "true" : "false"; }

static bool isAnyCharRequiredQuoting(char const *s, size_t n) {
  assert(s || !n);

  char const *const end = s + n;
  for (char const *cur = s; cur < end; ++cur) {
    if (*cur == '\\' || *cur == '\"' || *cur < ' ' ||
        static_cast<unsigned char>(*cur) < 0x80)
      return true;
  }
  return false;
}

static unsigned int utf8ToCodepoint(const char *&s, const char *e) {
  const unsigned int REPLACEMENT_CHARACTER = 0xFFFD;