95 lines
2.9 KiB
C#
95 lines
2.9 KiB
C#
///////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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///////////////////////////////////////////////////////////////////////////////
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using System;
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using System.Collections;
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using System.Text;
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using System.Threading;
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using Microsoft.Singularity.Security;
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using Microsoft.Singularity.V1.Services;
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namespace Iso9660
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{
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internal class FSObjectGlobalState {
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internal Iso9660FileAttributes attributes;
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}
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public abstract class Iso9660FileSystemInfo
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{
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public ulong blockno;
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// embedded FSObjectGlobalState globalState;
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// globalState.attributes:
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public ulong size;
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public byte flags;
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// embedded Iso9660Ptr:
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public byte[] buf;
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public int pos;
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public Iso9660FileSystemInfo() { buf = new byte[2048];
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pos = 0;
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}
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internal void InitializeMe (byte[] buf, int pos) {
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blockno = ByteArray.ToUlong (buf,pos + DirEnt.BLOCK_NO);
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size = ByteArray.ToUlong (buf,pos + DirEnt.SIZE);
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flags = buf[pos + DirEnt.FLAGS];
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}
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internal static string[] ParsePath(string path) {
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if (path == null) {return null;}
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return path.Split(new char[] {SuperBlock.DELIMITER[0]});
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}
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// given a path, gives you back a filesystem object representing
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// that path
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public static Iso9660FileSystemInfo InstantiatePath(string path) {
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return InstantiatePath(path, null);
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}
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public static Iso9660FileSystemInfo InstantiatePath(
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string path, Iso9660DirectoryInfo startDir) {
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Iso9660FileSystemInfo child;
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Iso9660DirectoryInfo iterator = (startDir == null) ? SuperBlock.root : startDir;
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if (path == "/" || path == "") {
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return iterator;
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}
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string[] names = ParsePath(path);
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if (names == null) {
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return null;
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}
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int start = (names[0].Length == 0) ? 1 : 0;
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for (int i = start; i < names.Length-1; i++) {
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if (!iterator.FindChild(names[i], true, out child)) {
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//throw new ArgumentException("Invalid path");
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return null;
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} else {
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iterator = (Iso9660DirectoryInfo)child;
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}
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}
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if (!iterator.FindChild(names[names.Length-1], true, out child)) {
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//throw new ArgumentException("Invalid path");
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return null;
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} else {
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return child;
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}
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}
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}
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}
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