Make IOSink implement StringSink

sdk/lib/io/string_transformer.dart

Index: sdk/lib/io/string_transformer.dart
diff --git a/sdk/lib/io/string_transformer.dart b/sdk/lib/io/string_transformer.dart
index 2b02639f474f2cb64d2c5a5a75b346f43a20bbcf..2deb925a3d09520608e9dc4d9acd0b3a08c0d6d2 100644
--- a/sdk/lib/io/string_transformer.dart
+++ b/sdk/lib/io/string_transformer.dart
@@ -13,6 +13,30 @@ class Encoding {
   static const Encoding ASCII = const Encoding._internal("us-ascii");
 
   /**
+   * Gets an [Encoding] object from the name of the character set
+   * name. The names used are the IANA official names for the
+   * character set (see
+   * http://www.iana.org/assignments/character-sets/character-sets.xml).
+   *
+   * The [name] passed is case insensitive.
+   *
+   * If character set is not supported [:null:] is returned.
+   */
+  static Encoding fromName(String name) {
+    if (name == null) return null;
+    name = name.toLowerCase();
+    if (name == "iso-8859-1" || name == "iso_8859-1" || name == "latin1") {
+      return ISO_8859_1;
+    } else if (name == "utf-8") {
+      return UTF_8;
+    } else if (name == "us-ascii" || name == "ascii") {
+      return ASCII;
+    } else {
+      return null;
+    }

[nweiz, 2013/03/07 19:32:05]

It would be nice if we could support all the character set aliases listed in
http://www.iana.org/assignments/character-sets/character-sets.xml.

[Søren Gjesse, 2013/03/08 09:47:46]

Done.

+  }
+
+  /**
    * Name of the encoding. This will be the lower-case version of one of the
    * IANA official names for the character set (see
    * http://www.iana.org/assignments/character-sets/character-sets.xml)