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Viewing changes to Mono.Addins/Mono.Addins.Database/Util.cs

  • Committer: Bazaar Package Importer
  • Author(s): Mirco Bauer
  • Date: 2007-07-14 12:07:48 UTC
  • Revision ID: james.westby@ubuntu.com-20070714120748-2elczfsjlrdsrpms
Tags: upstream-0.2
Import upstream version 0.2

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Mono.Addins/Mono.Addins.Database/Util.cs
 
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//
 
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// Util.cs
 
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//
 
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// Author:
 
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//   Lluis Sanchez Gual
 
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//
 
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// Copyright (C) 2007 Novell, Inc (http://www.novell.com)
 
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//
 
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// Permission is hereby granted, free of charge, to any person obtaining
 
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// a copy of this software and associated documentation files (the
 
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// "Software"), to deal in the Software without restriction, including
 
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// without limitation the rights to use, copy, modify, merge, publish,
 
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// distribute, sublicense, and/or sell copies of the Software, and to
 
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// permit persons to whom the Software is furnished to do so, subject to
 
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// the following conditions:
 
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// 
 
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// The above copyright notice and this permission notice shall be
 
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// included in 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,
 
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
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//
 
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using System;
 
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using System.Collections;
 
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using System.IO;
 
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using System.Reflection;
 
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using Mono.Addins.Description;
 
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using Mono.Addins.Serialization;
 
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namespace Mono.Addins.Database
 
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{
 
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        internal class Util
 
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        {
 
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                public static bool IsWindows {
 
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                        get { return Path.DirectorySeparatorChar == '\\'; }
 
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                }
 
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                public static void CheckWrittableFloder (string path)
 
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                {
 
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                        string testFile = null;
 
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                        int n = 0;
 
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                        do {
 
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                                testFile = Path.Combine (path, new Random ().Next ().ToString ());
 
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                                n++;
 
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                        } while (File.Exists (testFile) && n < 100);
 
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                        if (n == 100)
 
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                                throw new InvalidOperationException ("Could not create file in directory: " + path);
 
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                        StreamWriter w = new StreamWriter (testFile);
 
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                        w.Close ();
 
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                        File.Delete (testFile);
 
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                }
 
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                public static void AddDependencies (AddinDescription desc, AddinScanResult scanResult)
 
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                {
 
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                        // Not implemented in AddinScanResult to avoid making AddinDescription remotable
 
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                        foreach (ModuleDescription mod in desc.AllModules) {
 
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                                foreach (Dependency dep in mod.Dependencies) {
 
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                                        AddinDependency adep = dep as AddinDependency;
 
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                                        if (adep == null) continue;
 
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                                        string depid = Addin.GetFullId (desc.Namespace, adep.AddinId, adep.Version);
 
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                                        scanResult.AddAddinToUpdateRelations (depid);
 
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                                }
 
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                        }
 
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                }
 
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                public static Assembly LoadAssemblyForReflection (string fileName)
 
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                {
 
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/*                      if (!gotLoadMethod) {
 
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                                reflectionOnlyLoadFrom = typeof(Assembly).GetMethod ("ReflectionOnlyLoadFrom");
 
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                                gotLoadMethod = true;
 
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                                LoadAssemblyForReflection (typeof(Util).Assembly.Location);
 
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                        }
 
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                        if (reflectionOnlyLoadFrom != null)
 
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                                return (Assembly) reflectionOnlyLoadFrom.Invoke (null, new string [] { fileName });
 
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                        else
 
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*/                              return Assembly.LoadFile (fileName);
 
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                }
 
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                // Works like Path.GetFullPath, but it does not require the path to exist
 
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                public static string GetFullPath (string path)
 
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                {
 
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                        if (path == null)
 
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                                throw new ArgumentNullException ("path");
 
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                        if (!Path.IsPathRooted (path))
 
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                                path = Path.Combine (Environment.CurrentDirectory, path);
 
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                        string root = Path.GetPathRoot (path);
 
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                        path = path.Substring (root.Length);
 
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                        string[] parts = path.Split (Path.DirectorySeparatorChar);
 
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                        string[] newParts = new string [parts.Length];
 
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                        int i = 0;
 
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                        for (int n=0; n<parts.Length; n++) {
 
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                                string p = parts [n];
 
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                                if (p == null || p.Length == 0 || p == ".")
 
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                                        continue;
 
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                                if (p == "..") {
 
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                                        if (i > 0)
 
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                                                i--;
 
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                                } else {
 
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                                        newParts [i++] = p;
 
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                                }
 
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                        }
 
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                        return root + string.Join (new string (Path.DirectorySeparatorChar, 1), newParts, 0, i);
 
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                }
 
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                public static int GetStringHashCode (string s)
 
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                {
 
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                        int h = 0;
 
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                        int n = 0;
 
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                        for (; n < s.Length - 1; n+=2) {
 
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                                h = (h << 5) - h + s[n];
 
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                                h = (h << 5) - h + s[n+1];
 
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                        }
 
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                        if (n < s.Length)
 
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                                h = (h << 5) - h + s[n];
 
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                        return h;
 
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                }
 
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                public static string GetGacPath (string fullName)
 
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                {
 
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                        string gacDir = typeof(Uri).Assembly.Location;
 
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                        gacDir = Path.GetDirectoryName (gacDir);
 
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                        gacDir = Path.GetDirectoryName (gacDir);
 
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                        gacDir = Path.GetDirectoryName (gacDir);
 
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                        string[] parts = fullName.Split (',');
 
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                        if (parts.Length != 4) return null;
 
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                        string name = parts[0].Trim ();
 
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                        int i = parts[1].IndexOf ('=');
 
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                        string version = i != -1 ? parts[1].Substring (i+1).Trim () : parts[1].Trim ();
 
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                        i = parts[2].IndexOf ('=');
 
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                        string culture = i != -1 ? parts[2].Substring (i+1).Trim () : parts[2].Trim ();
 
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                        if (culture == "neutral") culture = "";
 
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                        i = parts[3].IndexOf ('=');
 
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                        string token = i != -1 ? parts[3].Substring (i+1).Trim () : parts[3].Trim ();
 
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                        string file = Path.Combine (gacDir, name);
 
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                        file = Path.Combine (file, version + "_" + culture + "_" + token);
 
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                        return file;
 
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                }
 
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        }
 
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}