1 files changed, 78 insertions, 0 deletions
diff --git a/intl/uconv/ucvlatin/nsUTF16ToUnicode.h b/intl/uconv/ucvlatin/nsUTF16ToUnicode.h
new file mode 100644
index 000000000..227fb412f
--- /dev/null
+++ b/intl/uconv/ucvlatin/nsUTF16ToUnicode.h
@@ -0,0 +1,78 @@
+/* -*- 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/. */
+
+#ifndef nsUTF16ToUnicode_h_
+#define nsUTF16ToUnicode_h_
+
+#include "nsISupports.h"
+#include "nsUCSupport.h"
+
+// internal base class
+class nsUTF16ToUnicodeBase : public nsBasicDecoderSupport
+{
+protected:
+  // ctor accessible only by child classes
+  nsUTF16ToUnicodeBase() { Reset();}
+
+  nsresult UTF16ConvertToUnicode(const char* aSrc,
+                                 int32_t* aSrcLength, char16_t* aDest,
+                                 int32_t* aDestLength, bool aSwapBytes);
+
+public:
+  //--------------------------------------------------------------------
+  // Subclassing of nsDecoderSupport class [declaration]
+
+  MOZ_MUST_USE NS_IMETHOD GetMaxLength(const char* aSrc,
+                                       int32_t aSrcLength,
+                                       int32_t* aDestLength) override;
+  NS_IMETHOD Reset() override;
+
+protected:
+  uint8_t mState;
+  // to store an odd byte left over between runs
+  uint8_t mOddByte;
+  // to store an odd high surrogate left over between runs
+  char16_t mOddHighSurrogate;
+  // to store an odd low surrogate left over between runs
+  char16_t mOddLowSurrogate;
+};
+
+// UTF-16 big endian
+class nsUTF16BEToUnicode : public nsUTF16ToUnicodeBase
+{
+public:
+
+  NS_IMETHOD Convert(const char* aSrc, int32_t* aSrcLength,
+      char16_t* aDest, int32_t* aDestLength);
+};
+
+// UTF-16 little endian
+class nsUTF16LEToUnicode : public nsUTF16ToUnicodeBase
+{
+public:
+
+  NS_IMETHOD Convert(const char* aSrc, int32_t* aSrcLength,
+      char16_t* aDest, int32_t* aDestLength);
+};
+
+// UTF-16 with BOM
+class nsUTF16ToUnicode : public nsUTF16ToUnicodeBase
+{
+public:
+
+  nsUTF16ToUnicode() { Reset();}
+  NS_IMETHOD Convert(const char* aSrc, int32_t* aSrcLength,
+      char16_t* aDest, int32_t* aDestLength);
+
+  NS_IMETHOD Reset();
+
+private:
+
+  enum Endian {kUnknown, kBigEndian, kLittleEndian};
+  Endian  mEndian;
+  bool    mFoundBOM;
+};
+
+#endif /* nsUTF16ToUnicode_h_ */