Function AppendCentralDirectory

source/common/utility/writezip.cpp:139–183

//==========================================================================

int AppendCentralDirectory(FileWriter *zip_file, const FCompressedBuffer &content, std::pair<uint16_t, uint16_t> &dostime, int position)
{
	FZipCentralDirectoryInfo dir;

	int flags = 0;
	int method = content.mMethod;
	if (method >= FileSys::METHOD_IMPLODE_MIN && method <= FileSys::METHOD_IMPLODE_MAX)
	{
		flags = method - FileSys::METHOD_IMPLODE_MIN;
		method = FileSys::METHOD_IMPLODE;
	}
	else if (method == FileSys::METHOD_DEFLATE)
	{
		flags = 2;
	}
	else if (method >= 1337)
		return -1;

	dir.Magic = ZIP_CENTRALFILE;
	dir.VersionMadeBy[0] = 20;
	dir.VersionMadeBy[1] = 0;
	dir.VersionToExtract[0] = 20;
	dir.VersionToExtract[1] = 0;
	dir.Flags = LittleShort((uint16_t)flags);
	dir.Method = LittleShort((uint16_t)method);
	dir.ModTime = LittleShort(dostime.first);
	dir.ModDate = LittleShort(dostime.second);
	dir.CRC32 = content.mCRC32;
	dir.CompressedSize32 = LittleLong((unsigned)content.mCompressedSize);
	dir.UncompressedSize32 = LittleLong((unsigned)content.mSize);
	dir.NameLength = LittleShort((unsigned short)strlen(content.filename));
	dir.ExtraLength = 0;
	dir.CommentLength = 0;
	dir.StartingDiskNumber = 0;
	dir.InternalAttributes = 0;
	dir.ExternalAttributes = 0;
	dir.LocalHeaderOffset32 = LittleLong((unsigned)position);

	if (zip_file->Write(&dir, sizeof(dir)) != sizeof(dir) ||
		zip_file->Write(content.filename,  strlen(content.filename)) != strlen(content.filename))
	{
		return -1;
	}
	return 0;
}

bool WriteZip(const char* filename, const FCompressedBuffer* content, size_t contentcount)
{