Function duplicateStringValue

runtime/3rdparty/jsoncpp/jsoncpp.cpp:2755–2771

Duplicates the specified string value. * @param value Pointer to the string to duplicate. Must be zero-terminated if * length is "unknown". * @param length Length of the value. if equals to unknown, then it will be * computed using strlen(value). * @return Pointer on the duplicate instance of string. */

 * @return Pointer on the duplicate instance of string.
 */
static inline char *duplicateStringValue(const char *value, size_t length)
{
  // Avoid an integer overflow in the call to malloc below by limiting length
  // to a sane value.
  if (length >= static_cast<size_t>(Value::maxInt))
    length = Value::maxInt - 1;

  auto newString = static_cast<char *>(malloc(length + 1));
  if (newString == nullptr)
  {
    throwRuntimeError("in Json::Value::duplicateStringValue(): "
                      "Failed to allocate string value buffer");
  }
  memcpy(newString, value, length);
  newString[length] = 0;
  return newString;
}

/* Record the length as a prefix.
 */