Function releasePrefixedStringValue

ThirdParty/jsoncpp/vtkjsoncpp/jsoncpp.cpp:2605–2612

 */
#if JSONCPP_USING_SECURE_MEMORY
static inline void releasePrefixedStringValue(char* value) {
  unsigned length = 0;
  char const* valueDecoded;
  decodePrefixedString(true, value, &length, &valueDecoded);
  size_t const size = sizeof(unsigned) + length + 1U;
  memset(value, 0, size);
  free(value);
}
static inline void releaseStringValue(char* value, unsigned length) {
  // length==0 => we allocated the strings memory
  size_t size = (length == 0) ? strlen(value) : length;