/// <summary>
/// Saves this instance, aka overwrites the file header.
/// </summary>
public void Save()
{
var head = new FileHeader
{
Signature = PackCommon.Header,
Revision = (uint)Revision,
EntryCount = Count,
Path = Root,
Ft1 = Created.ToFileTime(),
Ft2 = Modified.ToFileTime()
};
var pkgHead = new PackageHeader
{
EntryCount = Count,
InfoHeaderSize = 0,
DataSectionSize = (uint)(_source.Length - _dataStart),
BlankSize = 0,
Zero = new byte[16]
};
var infos = new List <Tuple <byte[], PackageItemInfo> >();
foreach (var e in _entries.Values)
{
var info = new PackageItemInfo
{
CompressedSize = e.SizeInPack,
DecompressedSize = e.DecompressedSize,
IsCompressed = e.IsCompressed,
Offset = (uint)e.DataOffset,
Seed = e.CryptoSeed,
CreationTime = e.CreatedDate.ToFileTime(),
CreationTime2 = e.CreatedDate.ToFileTime(),
LastAccessTime = e.AccessDate.ToFileTime(),
ModifiedTime = e.ModifiedDate.ToFileTime(),
ModifiedTime2 = e.ModifiedDate.ToFileTime(),
};
var bytes = PackCommon.EncodeName(e.Name.PadRight(e.MaxNameLength, '\0'));
infos.Add(Tuple.Create(bytes, info));
pkgHead.InfoHeaderSize += bytes.Length + StructUtil.SizeOf <PackageItemInfo>();
}
pkgHead.BlankSize = (int)(_dataStart -
(StructUtil.SizeOf <FileHeader>() + StructUtil.SizeOf <PackageHeader>() +
pkgHead.InfoHeaderSize));
pkgHead.InfoHeaderSize += pkgHead.BlankSize;
_source.Position = 0;
head.WriteToStream(_source);
pkgHead.WriteToStream(_source);
foreach (var i in infos)
{
_source.Write(i.Item1, 0, i.Item1.Length);
i.Item2.WriteToStream(_source);
}
}
/// <summary>
/// Outputs the pack file to the given stream.
/// </summary>
/// <param name="dst">The DST.</param>
public void SaveTo(Stream dst)
{
var head = new FileHeader
{
Signature = PackCommon.Header,
Revision = Revision,
EntryCount = _entries.Count,
Path = Root,
Ft1 = DateTime.UtcNow.ToFileTimeUtc(),
Ft2 = DateTime.UtcNow.ToFileTimeUtc()
};
var pkgHead = new PackageHeader
{
EntryCount = _entries.Count,
InfoHeaderSize = 0,
DataSectionSize = (uint)_bodyStream.Position,
BlankSize = 0,
Zero = new byte[16]
};
var infos = new List <Tuple <byte[], PackageItemInfo> >();
foreach (var e in _entries)
{
var info = new PackageItemInfo()
{
CompressedSize = e.SizeInPack,
DecompressedSize = e.DecompressedSize,
IsCompressed = e.IsCompressed,
Offset = (uint)e.DataOffset,
Seed = e.CryptoSeed,
CreationTime = e.CreatedDate.ToFileTime(),
CreationTime2 = e.CreatedDate.ToFileTime(),
ModifiedTime = e.ModifiedDate.ToFileTime(),
ModifiedTime2 = e.ModifiedDate.ToFileTime(),
LastAccessTime = e.AccessDate.ToFileTime()
};
var bytes = PackCommon.EncodeName(e.Name);
infos.Add(Tuple.Create(bytes, info));
pkgHead.InfoHeaderSize += bytes.Length + StructUtil.SizeOf <PackageItemInfo>();
}
head.WriteToStream(dst);
pkgHead.WriteToStream(dst);
foreach (var i in infos)
{
dst.Write(i.Item1, 0, i.Item1.Length);
i.Item2.WriteToStream(dst);
}
_bodyStream.Position = 0;
_bodyStream.CopyTo(dst);
}
/// <summary>
/// Reads the package infos.
/// </summary>
/// <param name="packageHeader">The package header.</param>
/// <exception cref="System.Exception">Entry ' + name + ' is corrupted!</exception>
private void ReadPackageInfos(PackageHeader packageHeader)
{
var infoHeader = new byte[packageHeader.InfoHeaderSize];
_source.Read(infoHeader, 0, infoHeader.Length);
var ptr = 0;
for (var i = 0; i < packageHeader.EntryCount; i++)
{
int nameSectionLength;
if (infoHeader[ptr] < 4)
{
nameSectionLength = 0x10 * (infoHeader[ptr] + 1);
}
else if (infoHeader[ptr] == 4)
{
nameSectionLength = 0x60;
}
else
{
nameSectionLength = BitConverter.ToInt32(infoHeader, ptr + 1) + 5;
}
var lengthSize = (infoHeader[ptr] > 4 ? 5 : 1);
var nameStart = ptr + lengthSize;
var maxNameLength = nameSectionLength - lengthSize - 1; // 1 for the trailing \0, which we don't care about.
var name = Encoding.UTF8.GetString(infoHeader, nameStart, maxNameLength).TrimEnd('\0');
ptr += nameSectionLength;
var info = infoHeader.GetStruct <PackageItemInfo>(ptr);
if (info.Zero != 0)
{
throw new Exception("Entry '" + name + "' is corrupted!");
}
_entries[name.NormalizePath()] = new PackEntry(info, name, maxNameLength);
ptr += StructUtil.SizeOf <PackageItemInfo>();
}
}