Implement "replacement" text encoding.

Source/wtf/text/TextEncodingRegistry.cpp

 /*
  * Copyright (C) 2006, 2007, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2007-2009 Torch Mobile, Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 20 matching lines @@
 #include "wtf/CurrentTime.h"
 #include "wtf/HashMap.h"
 #include "wtf/HashSet.h"
 #include "wtf/MainThread.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/StringExtras.h"
 #include "wtf/ThreadingPrimitives.h"
 #include "wtf/text/CString.h"
 #include "wtf/text/TextCodecICU.h"
 #include "wtf/text/TextCodecLatin1.h"
+#include "wtf/text/TextCodecReplacement.h"
 #include "wtf/text/TextCodecUTF16.h"
 #include "wtf/text/TextCodecUTF8.h"
 #include "wtf/text/TextCodecUserDefined.h"
 #include "wtf/text/TextEncoding.h"
 
 namespace WTF {
 
 const size_t maxEncodingNameLength = 63;
 
 // Hash for all-ASCII strings that does case folding.
@@ skipping 162 matching lines @@
     TextCodecLatin1::registerCodecs(addToTextCodecMap);
 
     TextCodecUTF8::registerEncodingNames(addToTextEncodingNameMap);
     TextCodecUTF8::registerCodecs(addToTextCodecMap);
 
     TextCodecUTF16::registerEncodingNames(addToTextEncodingNameMap);
     TextCodecUTF16::registerCodecs(addToTextCodecMap);
 
     TextCodecUserDefined::registerEncodingNames(addToTextEncodingNameMap);
     TextCodecUserDefined::registerCodecs(addToTextCodecMap);
+
+    TextCodecReplacement::registerEncodingNames(addToTextEncodingNameMap);
+    TextCodecReplacement::registerCodecs(addToTextCodecMap);
+    textEncodingNameMap->remove("replacement");

[jsbell, 2014/02/21 22:35:55]

This seems like a hack, but so far as I can tell the alternatives are either
special-casing "replacement" in various entry points so it can't be referenced
by name, or touching all of the places in this file that assert that a codec
have itself as a label.

 }
 
 static void addEncodingName(HashSet<const char*>* set, const char* name)
 {
     // We must not use atomicCanonicalTextEncodingName() because this function is called in it.
     const char* atomicName = textEncodingNameMap->get(name);
     if (atomicName)
         set->add(atomicName);
 }
 
@@ skipping 120 matching lines @@
     MutexLocker lock(encodingRegistryMutex());
 
     TextEncodingNameMap::const_iterator it = textEncodingNameMap->begin();
     TextEncodingNameMap::const_iterator end = textEncodingNameMap->end();
     for (; it != end; ++it)
         fprintf(stderr, "'%s' => '%s'\n", it->key, it->value);
 }
 #endif
 
 } // namespace WTF