/// <summary> /// Parse TarHeader information from a header buffer. /// </summary> /// <param name = "header"> /// The tar entry header buffer to get information from. /// </param> public void ParseBuffer(byte[] header) { if (header == null) { throw new ArgumentNullException("header"); } int offset = 0; name = TarHeader.ParseName(header, offset, TarHeader.NAMELEN).ToString(); offset += TarHeader.NAMELEN; mode = (int)TarHeader.ParseOctal(header, offset, TarHeader.MODELEN); offset += TarHeader.MODELEN; UserId = (int)TarHeader.ParseOctal(header, offset, TarHeader.UIDLEN); offset += TarHeader.UIDLEN; GroupId = (int)TarHeader.ParseOctal(header, offset, TarHeader.GIDLEN); offset += TarHeader.GIDLEN; Size = TarHeader.ParseOctal(header, offset, TarHeader.SIZELEN); offset += TarHeader.SIZELEN; ModTime = GetDateTimeFromCTime(TarHeader.ParseOctal(header, offset, TarHeader.MODTIMELEN)); offset += TarHeader.MODTIMELEN; checksum = (int)TarHeader.ParseOctal(header, offset, TarHeader.CHKSUMLEN); offset += TarHeader.CHKSUMLEN; TypeFlag = header[offset++]; LinkName = TarHeader.ParseName(header, offset, TarHeader.NAMELEN).ToString(); offset += TarHeader.NAMELEN; Magic = TarHeader.ParseName(header, offset, TarHeader.MAGICLEN).ToString(); offset += TarHeader.MAGICLEN; Version = TarHeader.ParseName(header, offset, TarHeader.VERSIONLEN).ToString(); offset += TarHeader.VERSIONLEN; UserName = TarHeader.ParseName(header, offset, TarHeader.UNAMELEN).ToString(); offset += TarHeader.UNAMELEN; GroupName = TarHeader.ParseName(header, offset, TarHeader.GNAMELEN).ToString(); offset += TarHeader.GNAMELEN; DevMajor = (int)TarHeader.ParseOctal(header, offset, TarHeader.DEVLEN); offset += TarHeader.DEVLEN; DevMinor = (int)TarHeader.ParseOctal(header, offset, TarHeader.DEVLEN); // Fields past this point not currently parsed or used... isChecksumValid = Checksum == TarHeader.MakeCheckSum(header); }
/// <summary> /// Parse TarHeader information from a header buffer. /// </summary> /// <param name = "header"> /// The tar entry header buffer to get information from. /// </param> /// <param name = "nameEncoding"> /// The <see cref="Encoding"/> used for the Name field, or null for ASCII only /// </param> public void ParseBuffer(byte[] header, Encoding nameEncoding) { if (header == null) { throw new ArgumentNullException(nameof(header)); } int offset = 0; name = ParseName(header, offset, NAMELEN, nameEncoding).ToString(); offset += NAMELEN; mode = (int)ParseOctal(header, offset, MODELEN); offset += MODELEN; UserId = (int)ParseOctal(header, offset, UIDLEN); offset += UIDLEN; GroupId = (int)ParseOctal(header, offset, GIDLEN); offset += GIDLEN; Size = ParseBinaryOrOctal(header, offset, SIZELEN); offset += SIZELEN; ModTime = GetDateTimeFromCTime(ParseOctal(header, offset, MODTIMELEN)); offset += MODTIMELEN; checksum = (int)ParseOctal(header, offset, CHKSUMLEN); offset += CHKSUMLEN; TypeFlag = header[offset++]; LinkName = ParseName(header, offset, NAMELEN, nameEncoding).ToString(); offset += NAMELEN; Magic = ParseName(header, offset, MAGICLEN, nameEncoding).ToString(); offset += MAGICLEN; if (Magic == "ustar") { Version = ParseName(header, offset, VERSIONLEN, nameEncoding).ToString(); offset += VERSIONLEN; UserName = ParseName(header, offset, UNAMELEN, nameEncoding).ToString(); offset += UNAMELEN; GroupName = ParseName(header, offset, GNAMELEN, nameEncoding).ToString(); offset += GNAMELEN; DevMajor = (int)ParseOctal(header, offset, DEVLEN); offset += DEVLEN; DevMinor = (int)ParseOctal(header, offset, DEVLEN); offset += DEVLEN; string prefix = ParseName(header, offset, PREFIXLEN, nameEncoding).ToString(); if (!string.IsNullOrEmpty(prefix)) { Name = prefix + '/' + Name; } } isChecksumValid = Checksum == TarHeader.MakeCheckSum(header); }