示例#1
0
        protected ZipHeader ReadHeader(uint headerBytes, BinaryReader reader)
        {
            switch (headerBytes)
            {
            case 0x5054b50:
                return(null);

            case 0x6054b50:
            {
                DirectoryEndHeader header3 = new DirectoryEndHeader();
                header3.Read(reader);
                return(header3);
            }

            case 0x2014b50:
            {
                DirectoryEntryHeader header2 = new DirectoryEntryHeader();
                header2.Read(reader);
                return(header2);
            }

            case 0x4034b50:
            {
                LocalEntryHeader entryHeader = new LocalEntryHeader();
                entryHeader.Read(reader);
                this.LoadHeader(entryHeader, reader.BaseStream);
                this.lastEntryHeader = entryHeader;
                return(entryHeader);
            }

            case 0x6064b50:
            case 0x7064b50:
            {
                IgnoreHeader header4 = new IgnoreHeader(ZipHeaderType.Ignore);
                header4.Read(reader);
                return(header4);
            }

            case 0x8074b50:
                if (FlagUtility.HasFlag <HeaderFlags>(this.lastEntryHeader.Flags, HeaderFlags.UsePostDataDescriptor))
                {
                    this.lastEntryHeader.Crc              = reader.ReadUInt32();
                    this.lastEntryHeader.CompressedSize   = reader.ReadUInt32();
                    this.lastEntryHeader.UncompressedSize = reader.ReadUInt32();
                }
                else
                {
                    reader.ReadUInt32();
                    reader.ReadUInt32();
                    reader.ReadUInt32();
                }
                return(null);

            case 0x30304b50:
                return(new SplitHeader());
            }
            throw new NotSupportedException("Unknown header: " + headerBytes);
        }
        protected ZipHeader ReadHeader(uint headerBytes, BinaryReader reader)
        {
            switch (headerBytes)
            {
            case ENTRY_HEADER_BYTES:
            {
                var entryHeader = new LocalEntryHeader();
                entryHeader.Read(reader);
                LoadHeader(entryHeader, reader.BaseStream);

                lastEntryHeader = entryHeader;
                return(entryHeader);
            }

            case DIRECTORY_START_HEADER_BYTES:
            {
                var entry = new DirectoryEntryHeader();
                entry.Read(reader);
                return(entry);
            }

            case POST_DATA_DESCRIPTOR:
            {
                if (FlagUtility.HasFlag(lastEntryHeader.Flags, HeaderFlags.UsePostDataDescriptor))
                {
                    lastEntryHeader.Crc              = reader.ReadUInt32();
                    lastEntryHeader.CompressedSize   = reader.ReadUInt32();
                    lastEntryHeader.UncompressedSize = reader.ReadUInt32();
                }
                else
                {
                    reader.ReadUInt32();
                    reader.ReadUInt32();
                    reader.ReadUInt32();
                }
                return(null);
            }

            case DIGITAL_SIGNATURE:
                return(null);

            case DIRECTORY_END_HEADER_BYTES:
            {
                var entry = new DirectoryEndHeader();
                entry.Read(reader);
                return(entry);
            }

            case SPLIT_ARCHIVE_HEADER_BYTES:
            {
                return(new SplitHeader());
            }

            case ZIP64_END_OF_CENTRAL_DIRECTORY:
            case ZIP64_END_OF_CENTRAL_DIRECTORY_LOCATOR:
            {
                var entry = new IgnoreHeader(ZipHeaderType.Ignore);
                entry.Read(reader);
                return(entry);
            }

            default:
                throw new NotSupportedException("Unknown header: " + headerBytes);
            }
        }