/// <summary>
/// Writes the header of the file with the writer.
/// </summary>
/// <param name="writer"> The writer. </param>
/// <param name="entry"> The entry. </param>
/// <param name="isCentralFileHeader"> Determines whether header is central file header or not (local). </param>
private void WriteFileHeader(IByteArrayWriter writer, ZipWriteOnlyStorerEntry entry, bool isCentralFileHeader)
{
if (isCentralFileHeader)
{
writer.WriteBytes(centralDirectoryFileHeaderSignatureBytes); // 4 bytes, central directory file header signature
writer.WriteBytes(23, 0xB); // 2 bytes, version made by
}
else
{
writer.WriteBytes(localFileHeaderSignatureBytes); // 4 bytes, local file header signature
}
writer.WriteBytes(versionToExtractBytes); // 2 bytes, version needed to extract (minimum)
writer.WriteBytes(gpbg8Bytes); // 2 bytes, general purpose bit flag
writer.WriteBytes(entry.CompressionMethodAsBytes); // 2 bytes, compression method
writer.WriteBytes(entry.ModifyTimeAsBytes); // 2+2 bytes, file last modification time and date
writer.WriteBytes(entry.CRC32AsBytes); // 4 bytes, CRC-32
writer.WriteBytes(entry.CompressedSizeAsBytes); // 4 bytes, compressed size
writer.WriteBytes(entry.SizeAsBytes); // 4 bytes, uncompressed size
writer.WriteBytes(entry.PathLengthAsBytes); // 2 bytes, file name length
if (this.isZip64)
{
writer.WriteBytes(thirtyTwo2Bytes); // 2 bytes, extra field length = 32
}
else
{
writer.WriteBytes(zero2Bytes); // 2 bytes, extra field length = 32
}
if (isCentralFileHeader)
{
writer.WriteBytes(entry.CommentLengthAsBytes); // 2 bytes, file comment length
writer.WriteBytes(zero4Bytes); // 2+2=4 bytes, disk number where file starts (disk=0), internal file attributes
writer.WriteBytes(externalAttributesBytes); // 4 bytes, External file attributes
writer.WriteBytes(entry.HeaderOffsetAsBytes); // 4 bytes, relative offset of header
}
writer.WriteBytes(entry.PathAsBytes); // variable size, file name
if (this.isZip64)
{
writer.WriteBytes(zip64ExtraBlockTagSignatureBytes); // 2 bytes, tag for the extra block (ZIP64 Extended Information Extra Field)
writer.WriteBytes(thirtyTwo2Bytes); // 2 bytes, size of the extra block
writer.WriteBytes(zero4Bytes);
writer.WriteBytes(entry.SizeZip64AsBytes); // 8 bytes, uncompressed size
writer.WriteBytes(zero4Bytes);
writer.WriteBytes(entry.CompressedSizeZip64AsBytes); // 8 bytes, compressed size
writer.WriteBytes(zero4Bytes);
writer.WriteBytes(entry.HeaderOffsetZip64AsBytes); // 8 bytes, compressed size
writer.WriteBytes(zero4Bytes); // 4 bytes, disk number where file starts (disk=0)
}
if (isCentralFileHeader)
{
writer.WriteBytes(entry.CommentAsBytes); // variable size, file comment
}
}
public void Code(IByteArrayWriter writer, ref object value)
{
MessageBase valueEx = value as MessageBase;
if (valueEx == null)
{
throw new NullReferenceException("转换为空");
}
valueEx.PackMsg(writer);
}
/// <summary>
/// 写入消息包
/// </summary>
/// <param name="writer"></param>
public virtual void PackMsg(IByteArrayWriter writer)
{
}
public void Code(IByteArrayWriter writer, ref object value)
{
writer.WriteI32((Int32)value);
}
public void Code(IByteArrayWriter writer, ref object value)
{
writer.WriteU32((uint)value);
}
/// <summary>
/// Writes the array of the bytes with the <see cref="IByteArrayWriter"></see>.
/// </summary>
/// <param name="writer"> The writer. </param>
/// <param name="data"> Array of the bytes. </param>
public static void WriteBytes(this IByteArrayWriter writer, params byte[] data)
{
writer.WriteBytes(data, 0, data.Length);
}
