Function ParseEXRMultipartHeaderFromMemory

tutorials/common/image/tinyexr.h:8720–8830

}

int ParseEXRMultipartHeaderFromMemory(EXRHeader ***exr_headers,
                                      int *num_headers,
                                      const EXRVersion *exr_version,
                                      const unsigned char *memory, size_t size,
                                      const char **err) {
  if (memory == NULL || exr_headers == NULL || num_headers == NULL ||
      exr_version == NULL) {
    // Invalid argument
    tinyexr::SetErrorMessage(
        "Invalid argument for ParseEXRMultipartHeaderFromMemory", err);
    return TINYEXR_ERROR_INVALID_ARGUMENT;
  }

  if (size < tinyexr::kEXRVersionSize) {
    tinyexr::SetErrorMessage("Data size too short", err);
    return TINYEXR_ERROR_INVALID_DATA;
  }

  const unsigned char *marker = memory + tinyexr::kEXRVersionSize;
  size_t marker_size = size - tinyexr::kEXRVersionSize;

  std::vector<tinyexr::HeaderInfo> infos;

  for (;;) {
    tinyexr::HeaderInfo info;
    info.clear();

    std::string err_str;
    bool empty_header = false;
    int ret = ParseEXRHeader(&info, &empty_header, exr_version, &err_str,
                             marker, marker_size);

    if (ret != TINYEXR_SUCCESS) {

      // Free malloc-allocated memory here.
      for (size_t i = 0; i < info.attributes.size(); i++) {
        if (info.attributes[i].value) {
          free(info.attributes[i].value);
        }
      }

      tinyexr::SetErrorMessage(err_str, err);
      return ret;
    }

    if (empty_header) {
      marker += 1;  // skip '\0'
      break;
    }

    // `chunkCount` must exist in the header.
    if (info.chunk_count == 0) {

      // Free malloc-allocated memory here.
      for (size_t i = 0; i < info.attributes.size(); i++) {
        if (info.attributes[i].value) {
          free(info.attributes[i].value);
        }