Imported Upstream version 4.3.2.467

Former-commit-id: 9c2cb47f45fa221e661ab616387c9cda183f283d
2016-02-22 11:00:01 -05:00
parent f302175246
commit f3e3aab35a
4097 changed files with 122406 additions and 82300 deletions
--- a/mcs/class/corlib/coreclr/EncodingProvider.cs
+++ b/mcs/class/corlib/coreclr/EncodingProvider.cs
@ -0,0 +1,136 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace System.Text
+{
+    using System;
+    using System.Collections;
+    using System.Collections.Generic;
+
+    [System.Runtime.InteropServices.ComVisible(true)]
+    public abstract class EncodingProvider
+    {
+        public EncodingProvider() { }
+        public abstract Encoding GetEncoding(string name);
+        public abstract Encoding GetEncoding(int codepage);
+
+        // GetEncoding should return either valid encoding or null. shouldn't throw any exception except on null name
+        public virtual Encoding GetEncoding(string name, EncoderFallback encoderFallback, DecoderFallback decoderFallback)
+        {
+            Encoding enc = GetEncoding(name);
+            if (enc != null)
+            {
+                enc = (Encoding)GetEncoding(name).Clone();
+                enc.EncoderFallback = encoderFallback;
+                enc.DecoderFallback = decoderFallback;
+            }
+
+            return enc;
+        }
+
+        public virtual Encoding GetEncoding(int codepage, EncoderFallback encoderFallback, DecoderFallback decoderFallback)
+        {
+            Encoding enc = GetEncoding(codepage);
+            if (enc != null)
+            {
+                enc = (Encoding)GetEncoding(codepage).Clone();
+                enc.EncoderFallback = encoderFallback;
+                enc.DecoderFallback = decoderFallback;
+            }
+
+            return enc;
+        }
+
+        internal static void AddProvider(EncodingProvider provider)
+        {
+            if (provider == null)
+                throw new ArgumentNullException("provider");
+
+            lock (s_InternalSyncObject)
+            {
+                if (s_providers == null)
+                {
+                    s_providers = new EncodingProvider[1] { provider };
+                    return;
+                }
+
+                if (Array.IndexOf(s_providers, provider) >= 0)
+                {
+                    return;
+                }
+
+                var providers = new EncodingProvider[s_providers.Length + 1];
+                Array.Copy(s_providers, providers, s_providers.Length);
+                providers[providers.Length - 1] = provider;
+                s_providers = providers;
+            }
+        }
+
+        internal static Encoding GetEncodingFromProvider(int codepage)
+        {
+            if (s_providers == null)
+                return null;
+
+            var providers = s_providers;
+            foreach (EncodingProvider provider in providers)
+            {
+                Encoding enc = provider.GetEncoding(codepage);
+                if (enc != null)
+                    return enc;
+            }
+
+            return null;
+        }
+
+        internal static Encoding GetEncodingFromProvider(string encodingName)
+        {
+            if (s_providers == null)
+                return null;
+
+            var providers = s_providers;
+            foreach (EncodingProvider provider in providers)
+            {
+                Encoding enc = provider.GetEncoding(encodingName);
+                if (enc != null)
+                    return enc;
+            }
+
+            return null;
+        }
+
+        internal static Encoding GetEncodingFromProvider(int codepage, EncoderFallback enc, DecoderFallback dec)
+        {
+            if (s_providers == null)
+                return null;
+
+            var providers = s_providers;
+            foreach (EncodingProvider provider in providers)
+            {
+                Encoding encing = provider.GetEncoding(codepage, enc, dec);
+                if (encing != null)
+                    return encing;
+            }
+
+            return null;
+        }
+
+        internal static Encoding GetEncodingFromProvider(string encodingName, EncoderFallback enc, DecoderFallback dec)
+        {
+            if (s_providers == null)
+                return null;
+
+            var providers = s_providers;
+            foreach (EncodingProvider provider in providers)
+            {
+                Encoding encoding = provider.GetEncoding(encodingName, enc, dec);
+                if (encoding != null)
+                    return encoding;
+            }
+
+            return null;
+        }
+
+        private static Object s_InternalSyncObject = new Object();
+        private static volatile EncodingProvider[] s_providers;
+    }
+}