Imported Upstream version 5.4.0.167

Former-commit-id: 5624ac747d633e885131e8349322922b6a59baaa

external/api-doc-tools/monodoc/Monodoc/storage/ZipStorage.cs

@@ -0,0 +1,131 @@
+using System;
+using System.IO;
+using System.Xml;
+using System.Linq;
+using System.Text;
+using System.Collections.Generic;
+
+using ICSharpCode.SharpZipLib.Zip;
+
+namespace Monodoc.Storage
+{
+	public class ZipStorage : IDocStorage
+	{
+		string zipFileName;
+		int code;
+		ZipOutputStream zipOutput;
+		ZipFile zipFile;
+		// SharpZipLib use linear search to map name to index, correct that a bit
+		Dictionary<string, int> entries = new Dictionary<string, int> ();
+
+		public ZipStorage (string zipFileName)
+		{
+			this.zipFileName = zipFileName;
+		}
+
+		public bool SupportRevision {
+			get {
+				return false;
+			}
+		}
+
+		public IDocRevisionManager RevisionManager {
+			get {
+				return null;
+			}
+		}
+
+		public bool SupportChange {
+			get {
+				return true;
+			}
+		}
+
+		public string Store (string id, string text)
+		{
+			EnsureOutput ();
+			SetupEntry (zipOutput, ref id);
+			var writer = new StreamWriter (zipOutput);
+			writer.Write (text);
+			writer.Flush ();
+			
+			return id;
+		}
+
+		public string Store (string id, byte[] data)
+		{
+			EnsureOutput ();
+			SetupEntry (zipOutput, ref id);
+			zipOutput.Write (data, 0, data.Length);
+			return id;
+		}
+
+		public string Store (string id, Stream stream)
+		{
+			EnsureOutput ();
+			SetupEntry (zipOutput, ref id);
+			stream.CopyTo (zipOutput);
+			return id;
+		}
+
+		void SetupEntry (ZipOutputStream zipOutput, ref string id)
+		{
+			if (string.IsNullOrEmpty (id))
+				id = GetNewCode ();
+
+			ZipEntry entry = new ZipEntry (id);
+			zipOutput.PutNextEntry (entry);
+		}
+
+		public Stream Retrieve (string id)
+		{
+			EnsureInput ();
+			int index;
+			ZipEntry entry;
+			if (!entries.TryGetValue (id, out index) || (entry = zipFile[index]) == null)
+				entry = zipFile.GetEntry (id);
+			if (entry != null)
+				return zipFile.GetInputStream (entry);
+			else
+				throw new ArgumentException ("id", string.Format ("'{0}' isn't a valid id for this storage", id));
+		}
+
+		public IEnumerable<string> GetAvailableIds ()
+		{
+			EnsureInput ();
+			return zipFile.Cast<ZipEntry> ().Select (ze => ze.Name);
+		}
+
+		void EnsureOutput ()
+		{
+			if (zipFile != null)
+				throw new InvalidOperationException ("This ZipStorage instance is already used in read-mode");
+			if (zipOutput != null)
+				return;
+			zipOutput = new ZipOutputStream (File.Create (zipFileName));
+		}
+
+		void EnsureInput ()
+		{
+			if (zipOutput != null)
+				throw new InvalidOperationException ("This ZipStorage instance is already used in write-mode");
+			if (zipFile != null)
+				return;
+			zipFile = new ZipFile (zipFileName);
+			entries = Enumerable.Range (0, zipFile.Size).ToDictionary (i => zipFile[i].Name, i => i);
+		}
+
+		public void Dispose ()
+		{
+			if (zipOutput != null)
+				zipOutput.Dispose ();
+			if (zipFile != null)
+				zipFile.Close ();
+		}
+
+		string GetNewCode ()
+		{
+			return String.Format ("{0}", code++);
+		}
+	}
+}