public static Archive ReadArchive(string path, IHashService _hashService)
{
var ar = new Archive()
{
ArchiveAbsolutePath = path
};
using var mmf = MemoryMappedFile.CreateFromFile(path, FileMode.Open);
// read header
uint customDataLength = 0;
using (var vs = mmf.CreateViewStream(0, Header.EXTENDED_SIZE, MemoryMappedFileAccess.Read))
using (var br = new BinaryReader(vs))
{
ar.Header = ReadHeader(br);
customDataLength = br.ReadUInt32();
}
// read custom
try
{
if (customDataLength != 0)
{
using var vs = mmf.CreateViewStream(Header.EXTENDED_SIZE, customDataLength, MemoryMappedFileAccess.Read);
using var br = new BinaryReader(vs);
if (br.BaseStream.Length >= LxrsFooter.MIN_LENGTH)
{
var lxrs = br.ReadLxrsFooter(_hashService);
foreach (var s in lxrs.FileInfos)
{
_hashService.Add(s);
}
}
}
}
catch (UnauthorizedAccessException)
{
//Console.WriteLine(e);
}
// read files
using (var vs = mmf.CreateViewStream((long)ar.Header.IndexPosition, ar.Header.IndexSize,
MemoryMappedFileAccess.Read))
using (var br = new BinaryReader(vs))
{
ar.Index = ReadIndex(br, _hashService);
}
foreach (var file in ar.Index.FileEntries.Values)
{
file.Archive = ar;
ar.Files.Add(file.Key, file);
}
return(ar);
}
