128 lines
4.6 KiB
C#
128 lines
4.6 KiB
C#
//
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// Copyright (c) 2008-2011, Kenneth Bell
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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using DiscUtils.CoreCompat;
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using DiscUtils.Streams;
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using DiscUtils.Vfs;
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using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.IO;
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namespace DiscUtils.Iso9660
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{
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internal class ReaderDirectory : File, IVfsDirectory<ReaderDirEntry, File>
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{
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private readonly List<ReaderDirEntry> _records;
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public ReaderDirectory(IsoContext context, ReaderDirEntry dirEntry)
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: base(context, dirEntry)
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{
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byte[] buffer = new byte[IsoUtilities.SectorSize];
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Stream extent = new ExtentStream(_context.DataStream, dirEntry.Record.LocationOfExtent, uint.MaxValue, 0, 0);
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_records = new List<ReaderDirEntry>();
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uint totalLength = dirEntry.Record.DataLength;
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uint totalRead = 0;
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while (totalRead < totalLength)
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{
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int bytesRead = (int)Math.Min(buffer.Length, totalLength - totalRead);
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StreamUtilities.ReadExact(extent, buffer, 0, bytesRead);
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totalRead += (uint)bytesRead;
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uint pos = 0;
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while (pos < bytesRead && buffer[pos] != 0)
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{
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DirectoryRecord dr;
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uint length = (uint)DirectoryRecord.ReadFrom(buffer, (int)pos, context.VolumeDescriptor.CharacterEncoding, out dr);
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if (!IsoUtilities.IsSpecialDirectory(dr))
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{
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ReaderDirEntry childDirEntry = new ReaderDirEntry(_context, dr);
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if (context.SuspDetected && !string.IsNullOrEmpty(context.RockRidgeIdentifier))
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{
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if (childDirEntry.SuspRecords == null || !childDirEntry.SuspRecords.HasEntry(context.RockRidgeIdentifier, "RE"))
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{
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_records.Add(childDirEntry);
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}
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}
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else
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{
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_records.Add(childDirEntry);
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}
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}
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else if (dr.FileIdentifier == "\0")
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{
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Self = new ReaderDirEntry(_context, dr);
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}
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pos += length;
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}
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}
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}
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public override byte[] SystemUseData
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{
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get { return Self.Record.SystemUseData; }
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}
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public ICollection<ReaderDirEntry> AllEntries
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{
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get { return _records; }
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}
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public ReaderDirEntry Self { get; }
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public ReaderDirEntry GetEntryByName(string name)
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{
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bool anyVerMatch = name.IndexOf(';') < 0;
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string normName = IsoUtilities.NormalizeFileName(name).ToUpper(CultureInfo.InvariantCulture);
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if (anyVerMatch)
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{
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normName = normName.Substring(0, normName.LastIndexOf(';') + 1);
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}
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foreach (ReaderDirEntry r in _records)
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{
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string toComp = IsoUtilities.NormalizeFileName(r.FileName).ToUpper(CultureInfo.InvariantCulture);
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if (!anyVerMatch && toComp == normName)
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{
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return r;
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}
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if (anyVerMatch && toComp.StartsWith(normName, StringComparison.Ordinal))
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{
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return r;
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}
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}
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return null;
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}
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public ReaderDirEntry CreateNewFile(string name)
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{
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throw new NotSupportedException();
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}
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}
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} |