120 lines
2.7 KiB
C#
120 lines
2.7 KiB
C#
using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System;
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namespace OpenRa.FileFormats
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{
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public static class FileSystem
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{
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static List<IFolder> mountedFolders = new List<IFolder>();
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static Cache<uint, List<IFolder>> allFiles = new Cache<uint, List<IFolder>>( _ => new List<IFolder>() );
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static void MountInner(IFolder folder)
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{
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mountedFolders.Add(folder);
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foreach( var hash in folder.AllFileHashes() )
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{
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var l = allFiles[hash];
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if( !l.Contains( folder ) )
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l.Add( folder );
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}
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}
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public static void Mount(string name)
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{
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name = name.ToLowerInvariant();
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var optional = name.StartsWith("~");
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if (optional) name = name.Substring(1);
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var a = name.EndsWith(".mix")
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? (Action)(() => FileSystem.MountInner(new Package(name)))
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: () => FileSystem.MountInner(new Folder(name));
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if (optional)
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try { a(); }
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catch { }
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else
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a();
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}
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public static void UnmountAll()
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{
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mountedFolders.Clear();
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allFiles = new Cache<uint, List<IFolder>>( _ => new List<IFolder>() );
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}
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static Stream GetFromCache( Cache<uint, List<IFolder>> index, string filename )
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{
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foreach( var folder in index[ PackageEntry.HashFilename( filename ) ] )
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{
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Stream s = folder.GetContent(filename);
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if( s != null )
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return s;
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}
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return null;
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}
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public static Stream Open(string filename)
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{
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if( filename.IndexOfAny( new char[] { '/', '\\' } ) == -1 )
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{
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var ret = GetFromCache( allFiles, filename );
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if( ret != null )
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return ret;
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}
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foreach( IFolder folder in mountedFolders )
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{
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Stream s = folder.GetContent(filename);
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if( s != null )
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return s;
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}
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throw new FileNotFoundException( string.Format( "File not found: {0}", filename ), filename );
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}
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public static Stream OpenWithExts( string filename, params string[] exts )
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{
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if( filename.IndexOfAny( new char[] { '/', '\\' } ) == -1 )
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{
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foreach( var ext in exts )
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{
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var s = GetFromCache( allFiles, filename + ext );
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if( s != null )
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return s;
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}
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}
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foreach( var ext in exts )
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{
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foreach( IFolder folder in mountedFolders )
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{
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Stream s = folder.GetContent( filename + ext );
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if( s != null )
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return s;
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}
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}
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throw new FileNotFoundException( string.Format( "File not found: {0}", filename ), filename );
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}
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public static bool Exists(string filename)
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{
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foreach (var folder in mountedFolders)
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{
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var s = folder.GetContent(filename);
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if (s != null)
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{
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s.Dispose();
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return true;
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}
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}
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return false;
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}
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}
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}
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