Ejemplo n.º 1
0
        private bool WriteLocalFileHeader(bool isEmptyFile)
        {
            BinaryWriter    binaryWriter    = new BinaryWriter(this._archive.ArchiveStream);
            Zip64ExtraField zip64ExtraField = new Zip64ExtraField();
            bool            flag            = false;
            uint            num1;
            uint            num2;

            if (isEmptyFile)
            {
                this.CompressionMethod = ZipArchiveEntry.CompressionMethodValues.Stored;
                num1 = 0U;
                num2 = 0U;
            }
            else if (this._archive.Mode == ZipArchiveMode.Create && !this._archive.ArchiveStream.CanSeek && !isEmptyFile)
            {
                this._generalPurposeBitFlag = this._generalPurposeBitFlag | ZipArchiveEntry.BitFlagValues.DataDescriptor;
                flag = false;
                num1 = 0U;
                num2 = 0U;
            }
            else if (this.SizesTooLarge())
            {
                flag = true;
                num1 = uint.MaxValue;
                num2 = uint.MaxValue;
                zip64ExtraField.CompressedSize   = new long?(this._compressedSize);
                zip64ExtraField.UncompressedSize = new long?(this._uncompressedSize);
                this.VersionToExtractAtLeast(ZipVersionNeededValues.Zip64);
            }
            else
            {
                flag = false;
                num1 = (uint)this._compressedSize;
                num2 = (uint)this._uncompressedSize;
            }

            this._offsetOfLocalHeader = binaryWriter.BaseStream.Position;
            int    num3 = (flag ? (int)zip64ExtraField.TotalSize : 0) + (this._lhUnknownExtraFields != null ? ZipGenericExtraField.TotalSize(this._lhUnknownExtraFields) : 0);
            ushort num4;

            if (num3 > (int)ushort.MaxValue)
            {
                num4 = flag ? zip64ExtraField.TotalSize : (ushort)0;
                this._lhUnknownExtraFields = null;
            }
            else
            {
                num4 = (ushort)num3;
            }

            binaryWriter.Write(67324752U);
            binaryWriter.Write((ushort)this._versionToExtract);
            binaryWriter.Write((ushort)this._generalPurposeBitFlag);
            binaryWriter.Write((ushort)this.CompressionMethod);
            binaryWriter.Write(ZipHelper.DateTimeToDosTime(this._lastModified.DateTime));
            binaryWriter.Write(this._crc32);
            binaryWriter.Write(num1);
            binaryWriter.Write(num2);
            binaryWriter.Write((ushort)this._storedEntryNameBytes.Length);
            binaryWriter.Write(num4);
            binaryWriter.Write(this._storedEntryNameBytes);

            if (flag)
            {
                zip64ExtraField.WriteBlock(this._archive.ArchiveStream);
            }

            if (this._lhUnknownExtraFields != null)
            {
                ZipGenericExtraField.WriteAllBlocks(this._lhUnknownExtraFields, this._archive.ArchiveStream);
            }

            return(flag);
        }
Ejemplo n.º 2
0
        internal void WriteCentralDirectoryFileHeader()
        {
            BinaryWriter    binaryWriter    = new BinaryWriter(this._archive.ArchiveStream);
            Zip64ExtraField zip64ExtraField = new Zip64ExtraField();
            bool            flag            = false;
            uint            num1;
            uint            num2;

            if (this.SizesTooLarge())
            {
                flag = true;
                num1 = uint.MaxValue;
                num2 = uint.MaxValue;
                zip64ExtraField.CompressedSize   = new long?(this._compressedSize);
                zip64ExtraField.UncompressedSize = new long?(this._uncompressedSize);
            }
            else
            {
                num1 = (uint)this._compressedSize;
                num2 = (uint)this._uncompressedSize;
            }

            uint num3;

            if (this._offsetOfLocalHeader > (long)uint.MaxValue)
            {
                flag = true;
                num3 = uint.MaxValue;
                zip64ExtraField.LocalHeaderOffset = new long?(this._offsetOfLocalHeader);
            }
            else
            {
                num3 = (uint)this._offsetOfLocalHeader;
            }

            if (flag)
            {
                this.VersionToExtractAtLeast(ZipVersionNeededValues.Zip64);
            }

            int    num4 = (flag ? (int)zip64ExtraField.TotalSize : 0) + (this._cdUnknownExtraFields != null ? ZipGenericExtraField.TotalSize(this._cdUnknownExtraFields) : 0);
            ushort num5;

            if (num4 > (int)ushort.MaxValue)
            {
                num5 = flag ? zip64ExtraField.TotalSize : (ushort)0;
                this._cdUnknownExtraFields = null;
            }
            else
            {
                num5 = (ushort)num4;
            }

            binaryWriter.Write(33639248U);
            binaryWriter.Write((ushort)this._versionToExtract);
            binaryWriter.Write((ushort)this._versionToExtract);
            binaryWriter.Write((ushort)this._generalPurposeBitFlag);
            binaryWriter.Write((ushort)this.CompressionMethod);
            binaryWriter.Write(ZipHelper.DateTimeToDosTime(this._lastModified.DateTime));
            binaryWriter.Write(this._crc32);
            binaryWriter.Write(num1);
            binaryWriter.Write(num2);
            binaryWriter.Write((ushort)this._storedEntryNameBytes.Length);
            binaryWriter.Write(num5);
            binaryWriter.Write(this._fileComment != null ? (ushort)this._fileComment.Length : (ushort)0);
            binaryWriter.Write((ushort)0);
            binaryWriter.Write((ushort)0);
            binaryWriter.Write((uint)this._externalFileAttributes);
            binaryWriter.Write(num3);
            binaryWriter.Write(this._storedEntryNameBytes);

            if (flag)
            {
                zip64ExtraField.WriteBlock(this._archive.ArchiveStream);
            }

            if (this._cdUnknownExtraFields != null)
            {
                ZipGenericExtraField.WriteAllBlocks(this._cdUnknownExtraFields, this._archive.ArchiveStream);
            }

            if (this._fileComment != null)
            {
                binaryWriter.Write(this._fileComment);
            }
        }