Function MVOL_split_hdr_read

src/burp/mvol.cpp:2146–2181

____________________________________________________________ Read a header record for join operation

// Read a header record for join operation
//
bool MVOL_split_hdr_read()
{
	BurpGlobals* tdgbl = BurpGlobals::getSpecific();

	fb_assert(tdgbl->action);
	fb_assert(tdgbl->action->act_file);
	fb_assert(tdgbl->action->act_file->fil_fd != INVALID_HANDLE_VALUE);

	if (tdgbl->action && tdgbl->action->act_file &&
		(tdgbl->action->act_file->fil_fd != INVALID_HANDLE_VALUE))
	{
		TEXT buffer[HDR_SPLIT_SIZE];
		int cnt = 0;

#ifdef WIN_NT
		ReadFile(tdgbl->action->act_file->fil_fd, buffer, HDR_SPLIT_SIZE,
					reinterpret_cast<DWORD*>(&cnt), NULL);
#else
		cnt = read(tdgbl->action->act_file->fil_fd, buffer, HDR_SPLIT_SIZE);
#endif
		if ((cnt >= 0) && ((ULONG) cnt == HDR_SPLIT_SIZE) &&
			((strncmp(buffer, HDR_SPLIT_TAG, (sizeof(HDR_SPLIT_TAG) - 1)) == 0) ||
			(strncmp(buffer, HDR_SPLIT_TAG5, (sizeof(HDR_SPLIT_TAG) - 1)) == 0)))
		{
			const hdr_split* hdr = (hdr_split*) buffer;
			if ((tdgbl->action->act_file->fil_seq = atoi(hdr->hdr_split_sequence)) > 0 &&
				(tdgbl->action->act_total = atoi(hdr->hdr_split_total)) > 0 &&
				(tdgbl->action->act_file->fil_seq <= tdgbl->action->act_total))
			{
				return true;
			}
		}
	}

	return false;
}