C++ MemChunk::exportMemChunk方法代码示例

//.........这里部分代码省略.........

	// Guess number of lumps
	uint32_t num_lumps = dir_len / 16;

	// Stop announcements (don't want to be announcing modification due to entries being added etc)
	setMuted(true);

	// Read each entry
	theSplashWindow->setProgressMessage("Reading lfd archive data");
	size_t offset = dir_len + 16;
	size_t size = mc.getSize();
	for (uint32_t d = 0; offset < size; d++)
	{
		// Update splash window progress
		theSplashWindow->setProgress(((float)d / (float)num_lumps));

		// Read lump info
		uint32_t length = 0;
		char type[5] = "";
		char name[9] = "";

		mc.read(type, 4);		// Type
		mc.read(name, 8);		// Name
		mc.read(&length, 4);	// Size
		name[8] = '\0'; type[4] = 0;

		// Move past the header
		offset += 16;

		// Byteswap values for big endian if needed
		length = wxINT32_SWAP_ON_BE(length);

		// If the lump data goes past the end of the file,
		// the gobfile is invalid
		if (offset + length > size)
		{
			wxLogMessage("LfdArchive::open: lfd archive is invalid or corrupt");
			Global::error = "Archive is invalid and/or corrupt";
			setMuted(false);
			return false;
		}

		// Create & setup lump
		wxFileName fn(name);
		fn.SetExt(type);
		ArchiveEntry* nlump = new ArchiveEntry(fn.GetFullName(), length);
		nlump->setLoaded(false);
		nlump->exProp("Offset") = (int)offset;
		nlump->setState(0);

		// Add to entry list
		getRoot()->addEntry(nlump);

		// Move to next entry
		offset += length;
		mc.seek(offset, SEEK_SET);
	}

	if (num_lumps != numEntries())
		wxLogMessage("Warning: computed %i lumps, but actually %i entries", num_lumps, numEntries());

	// Detect all entry types
	MemChunk edata;
	theSplashWindow->setProgressMessage("Detecting entry types");
	for (size_t a = 0; a < numEntries(); a++)
	{
		// Update splash window progress
		theSplashWindow->setProgress((((float)a / (float)num_lumps)));

		// Get entry
		ArchiveEntry* entry = getEntry(a);

		// Read entry data if it isn't zero-sized
		if (entry->getSize() > 0)
		{
			// Read the entry data
			mc.exportMemChunk(edata, getEntryOffset(entry), entry->getSize());
			entry->importMemChunk(edata);
		}

		// Detect entry type
		EntryType::detectEntryType(entry);

		// Unload entry data if needed
		if (!archive_load_data)
			entry->unloadData();

		// Set entry to unchanged
		entry->setState(0);
	}

	// Setup variables
	setMuted(false);
	setModified(false);
	announce("opened");

	theSplashWindow->setProgressMessage("");

	return true;
}