diff -r 000000000000 -r 6474c204b198 intl/uconv/ucvlatin/nsUnicodeToUTF16.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/intl/uconv/ucvlatin/nsUnicodeToUTF16.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,106 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsUnicodeToUTF16.h"
+#include <string.h>
+
+NS_IMETHODIMP nsUnicodeToUTF16BE::Convert(const char16_t * aSrc, int32_t * aSrcLength, 
+      char * aDest, int32_t * aDestLength)
+{
+  int32_t srcInLen = *aSrcLength;
+  int32_t destInLen = *aDestLength;
+  int32_t srcOutLen = 0;
+  int32_t destOutLen = 0;
+  int32_t copyCharLen;
+  char16_t *p = (char16_t*)aDest;
+ 
+  // Handle BOM if necessary 
+  if(0!=mBOM)
+  {
+     if(destInLen <2)
+        goto needmoreoutput;
+  
+     *p++ = mBOM;
+     mBOM = 0;
+     destOutLen +=2;
+  }
+  // find out the length of copy 
+
+  copyCharLen = srcInLen;
+  if(copyCharLen > (destInLen - destOutLen) / 2) {
+     copyCharLen = (destInLen - destOutLen) / 2;
+  }
+
+  // copy the data  by swaping 
+  CopyData((char*)p , aSrc, copyCharLen );
+
+  srcOutLen += copyCharLen;
+  destOutLen += copyCharLen * 2;
+  if(copyCharLen < srcInLen)
+      goto needmoreoutput;
+  
+  *aSrcLength = srcOutLen;
+  *aDestLength = destOutLen;
+  return NS_OK;
+
+needmoreoutput:
+  *aSrcLength = srcOutLen;
+  *aDestLength = destOutLen;
+  return NS_OK_UENC_MOREOUTPUT;
+}
+
+NS_IMETHODIMP nsUnicodeToUTF16BE::GetMaxLength(const char16_t * aSrc, int32_t aSrcLength, 
+      int32_t * aDestLength)
+{
+  if(0 != mBOM)
+    *aDestLength = 2*(aSrcLength+1);
+  else 
+    *aDestLength = 2*aSrcLength;
+  return NS_OK_UENC_EXACTLENGTH;
+}
+
+NS_IMETHODIMP nsUnicodeToUTF16BE::Finish(char * aDest, int32_t * aDestLength)
+{
+  if(0 != mBOM)
+  {
+     if(*aDestLength >= 2)
+     {
+        *((char16_t*)aDest)= mBOM;
+        mBOM=0;
+        *aDestLength = 2;
+        return NS_OK;  
+     } else {
+        *aDestLength = 0;
+        return NS_OK;  // xxx should be error
+     }
+  } else { 
+     *aDestLength = 0;
+     return NS_OK;
+  } 
+}
+
+NS_IMETHODIMP nsUnicodeToUTF16BE::Reset()
+{
+  mBOM = 0;
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsUnicodeToUTF16BE::SetOutputErrorBehavior(int32_t aBehavior, 
+      nsIUnicharEncoder * aEncoder, char16_t aChar)
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsUnicodeToUTF16BE::CopyData(char* aDest, const char16_t* aSrc, int32_t aLen  )
+{
+  mozilla::NativeEndian::copyAndSwapToBigEndian(aDest, aSrc, aLen);
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsUnicodeToUTF16LE::CopyData(char* aDest, const char16_t* aSrc, int32_t aLen  )
+{
+  mozilla::NativeEndian::copyAndSwapToLittleEndian(aDest, aSrc, aLen);
+  return NS_OK;
+}