internal static ZipIOLocalFileHeader CreateNew(string fileName, Encoding encoding, CompressionMethodEnum compressionMethod, DeflateOptionEnum deflateOption, bool streaming)
{
byte[] bytes = encoding.GetBytes(fileName);
if (bytes.Length > ZipIOBlockManager.MaxFileNameSize)
{
throw new ArgumentOutOfRangeException("fileName");
}
ZipIOLocalFileHeader header = new ZipIOLocalFileHeader();
header._signature = 0x4034b50;
header._compressionMethod = (ushort)compressionMethod;
if (streaming)
{
header._versionNeededToExtract = 0x2d;
}
else
{
header._versionNeededToExtract = (ushort)ZipIOBlockManager.CalcVersionNeededToExtractFromCompression(compressionMethod);
}
if (compressionMethod != CompressionMethodEnum.Stored)
{
header.DeflateOption = deflateOption;
}
if (streaming)
{
header.StreamingCreationFlag = true;
}
header._lastModFileDateTime = ZipIOBlockManager.ToMsDosDateTime(DateTime.Now);
header._fileNameLength = (ushort)bytes.Length;
header._fileName = bytes;
header._extraField = ZipIOExtraField.CreateNew(!streaming);
header._extraFieldLength = header._extraField.Size;
header._stringFileName = fileName;
return(header);
}
internal void UpdateZip64Structures(long compressedSize, long uncompressedSize, long offset)
{
if (((compressedSize >= 0xffffffffL) || (uncompressedSize >= 0xffffffffL)) || (offset >= 0xffffffffL))
{
this._extraField.CompressedSize = compressedSize;
this._extraField.UncompressedSize = uncompressedSize;
this._compressedSize = uint.MaxValue;
this._uncompressedSize = uint.MaxValue;
this._versionNeededToExtract = 0x2d;
}
else
{
this._compressedSize = (uint)compressedSize;
this._uncompressedSize = (uint)uncompressedSize;
this._extraField.Zip64ExtraFieldUsage = ZipIOZip64ExtraFieldUsage.None;
this._versionNeededToExtract = (ushort)ZipIOBlockManager.CalcVersionNeededToExtractFromCompression(this.CompressionMethod);
}
}
private void UpdateZip64Structures(long compressedSize, long uncompressedSize, long offset)
{
if (((compressedSize >= 0xffffffffL) || (uncompressedSize >= 0xffffffffL)) || (offset >= 0xffffffffL))
{
this._extraField.CompressedSize = compressedSize;
this._extraField.UncompressedSize = uncompressedSize;
this._extraField.OffsetOfLocalHeader = offset;
this._compressedSize = uint.MaxValue;
this._uncompressedSize = uint.MaxValue;
this._relativeOffsetOfLocalHeader = uint.MaxValue;
this._versionNeededToExtract = 0x2d;
}
else
{
this._compressedSize = (uint)compressedSize;
this._uncompressedSize = (uint)uncompressedSize;
this._relativeOffsetOfLocalHeader = (uint)offset;
this._extraField.Zip64ExtraFieldUsage = ZipIOZip64ExtraFieldUsage.None;
this._versionNeededToExtract = (ushort)ZipIOBlockManager.CalcVersionNeededToExtractFromCompression((CompressionMethodEnum)this._compressionMethod);
}
}