// Reads the elements from the passed dictionary, which comes from the previous extended attributes entry,
// and inserts or replaces those elements into the current header's dictionary.
// If any of the dictionary entries use the name of a standard attribute, that attribute's value gets replaced with the one from the dictionary.
// Unlike the historic header, numeric values in extended attributes are stored using decimal, not octal.
// Throws if any conversion from string to the expected data type fails.
internal void ReplaceNormalAttributesWithExtended(Dictionary <string, string>?dictionaryFromExtendedAttributesHeader)
{
if (dictionaryFromExtendedAttributesHeader == null || dictionaryFromExtendedAttributesHeader.Count == 0)
{
return;
}
InitializeExtendedAttributesWithExisting(dictionaryFromExtendedAttributesHeader);
// Find all the extended attributes with known names and save them in the expected standard attribute.
// The 'name' header field only fits 100 bytes, so we always store the full name text to the dictionary.
if (ExtendedAttributes.TryGetValue(PaxEaName, out string?paxEaName))
{
_name = paxEaName;
}
// The 'linkName' header field only fits 100 bytes, so we always store the full linkName text to the dictionary.
if (ExtendedAttributes.TryGetValue(PaxEaLinkName, out string?paxEaLinkName))
{
_linkName = paxEaLinkName;
}
// The 'mtime' header field only fits 12 bytes, so a more precise timestamp goes in the extended attributes
if (TarHelpers.TryGetDateTimeOffsetFromTimestampString(ExtendedAttributes, PaxEaMTime, out DateTimeOffset mTime))
{
_mTime = mTime;
}
// The user could've stored an override in the extended attributes
if (TarHelpers.TryGetStringAsBaseTenInteger(ExtendedAttributes, PaxEaMode, out int mode))
{
_mode = mode;
}
// The 'size' header field only fits 12 bytes, so the data section length that surpases that limit needs to be retrieved
if (TarHelpers.TryGetStringAsBaseTenLong(ExtendedAttributes, PaxEaSize, out long size))
{
_size = size;
}
// The 'uid' header field only fits 8 bytes, or the user could've stored an override in the extended attributes
if (TarHelpers.TryGetStringAsBaseTenInteger(ExtendedAttributes, PaxEaUid, out int uid))
{
_uid = uid;
}
// The 'gid' header field only fits 8 bytes, or the user could've stored an override in the extended attributes
if (TarHelpers.TryGetStringAsBaseTenInteger(ExtendedAttributes, PaxEaGid, out int gid))
{
_gid = gid;
}
// The 'uname' header field only fits 32 bytes
if (ExtendedAttributes.TryGetValue(PaxEaUName, out string?paxEaUName))
{
_uName = paxEaUName;
}
// The 'gname' header field only fits 32 bytes
if (ExtendedAttributes.TryGetValue(PaxEaGName, out string?paxEaGName))
{
_gName = paxEaGName;
}
// The 'devmajor' header field only fits 8 bytes, or the user could've stored an override in the extended attributes
if (TarHelpers.TryGetStringAsBaseTenInteger(ExtendedAttributes, PaxEaDevMajor, out int devMajor))
{
_devMajor = devMajor;
}
// The 'devminor' header field only fits 8 bytes, or the user could've stored an override in the extended attributes
if (TarHelpers.TryGetStringAsBaseTenInteger(ExtendedAttributes, PaxEaDevMinor, out int devMinor))
{
_devMinor = devMinor;
}
}