C++ (Cpp) jsonlite_parser_estimate_size示例

示例#1

文件： main.c 项目： Kirow/jsonlite

int main(int argc, const char * argv[]) {
    const int JSON_DEPTH = 4;                                           // Limitation of JSON depth
    char json[] = "[-13453453, 0, 1, 123, 45345, -94534555]";           // Numbers to sum
    uint8_t parser_memory[jsonlite_parser_estimate_size(JSON_DEPTH)];   // Parser memory
    jsonlite_parser_callbacks cbs = jsonlite_default_callbacks;         // Init callbacks with default values
    cbs.number_found = &number_callback;                                // Assign new callback function
    jsonlite_parser p = jsonlite_parser_init(parser_memory,
                                             sizeof(parser_memory),
                                             jsonlite_null_buffer);     // Init parser
    jsonlite_parser_set_callback(p, &cbs);                              // Set callback function(s)
    jsonlite_parser_tokenize(p, json, sizeof(json));                    // Tokenize/find numbers
    printf("Total sum: %lld\n", sum);
    return 0;
}

示例#2

文件： M2XStreamClient.cpp 项目： karthiksrinivasan/ATTHackathon

int M2XStreamClient::readLocation(location_read_callback callback,
                                  void* context) {
  const int BUF_LEN = 40;
  char buf[BUF_LEN];

  int length = readContentLength();
  if (length < 0) {
    close();
    return length;
  }

  int index = skipHttpHeader();
  if (index != E_OK) {
    close();
    return index;
  }
  index = 0;

  location_parsing_context_state state;
  state.state = state.index = 0;
  state.callback = callback;
  state.context = context;

  jsonlite_parser_callbacks cbs = jsonlite_default_callbacks;
  cbs.key_found = on_location_key_found;
  cbs.string_found = on_location_string_found;
  cbs.context.client_state = &state;

  jsonlite_parser p = jsonlite_parser_init(jsonlite_parser_estimate_size(5));
  jsonlite_parser_set_callback(p, &cbs);

  jsonlite_result result = jsonlite_result_unknown;
  while (index < length) {
    int i = 0;

#ifdef DEBUG
    printf("Received Data: ");
#endif
    while ((i < BUF_LEN) && _client->available()) {
      buf[i++] = _client->read();
#ifdef DEBUG
      printf("%c", buf[i - 1]);
#endif
    }
#ifdef DEBUG
    printf("\n");
#endif

    if ((!_client->connected()) &&
        (!_client->available()) &&
        ((index + i) < length)) {
      jsonlite_parser_release(p);
      close();
      return E_NOCONNECTION;
    }

    result = jsonlite_parser_tokenize(p, buf, i);
    if ((result != jsonlite_result_ok) &&
        (result != jsonlite_result_end_of_stream)) {
      jsonlite_parser_release(p);
      close();
      return E_JSON_INVALID;
    }

    index += i;
  }

  jsonlite_parser_release(p);
  close();
  return (result == jsonlite_result_ok) ? (E_OK) : (E_JSON_INVALID);
}