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79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsUTF16ToUnicode_h_
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#define nsUTF16ToUnicode_h_
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#include "nsISupports.h"
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#include "nsUCSupport.h"
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// internal base class
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class nsUTF16ToUnicodeBase : public nsBasicDecoderSupport
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{
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protected:
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// ctor accessible only by child classes
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nsUTF16ToUnicodeBase() { Reset();}
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nsresult UTF16ConvertToUnicode(const char* aSrc,
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int32_t* aSrcLength, char16_t* aDest,
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int32_t* aDestLength, bool aSwapBytes);
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public:
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//--------------------------------------------------------------------
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// Subclassing of nsDecoderSupport class [declaration]
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MOZ_WARN_UNUSED_RESULT NS_IMETHOD GetMaxLength(const char* aSrc,
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int32_t aSrcLength,
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int32_t* aDestLength) override;
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NS_IMETHOD Reset() override;
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protected:
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uint8_t mState;
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// to store an odd byte left over between runs
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uint8_t mOddByte;
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// to store an odd high surrogate left over between runs
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char16_t mOddHighSurrogate;
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// to store an odd low surrogate left over between runs
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char16_t mOddLowSurrogate;
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};
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// UTF-16 big endian
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class nsUTF16BEToUnicode : public nsUTF16ToUnicodeBase
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{
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public:
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NS_IMETHOD Convert(const char* aSrc, int32_t* aSrcLength,
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char16_t* aDest, int32_t* aDestLength);
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};
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// UTF-16 little endian
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class nsUTF16LEToUnicode : public nsUTF16ToUnicodeBase
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{
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public:
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NS_IMETHOD Convert(const char* aSrc, int32_t* aSrcLength,
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char16_t* aDest, int32_t* aDestLength);
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};
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// UTF-16 with BOM
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class nsUTF16ToUnicode : public nsUTF16ToUnicodeBase
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{
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public:
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nsUTF16ToUnicode() { Reset();}
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NS_IMETHOD Convert(const char* aSrc, int32_t* aSrcLength,
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char16_t* aDest, int32_t* aDestLength);
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NS_IMETHOD Reset();
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private:
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enum Endian {kUnknown, kBigEndian, kLittleEndian};
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Endian mEndian;
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bool mFoundBOM;
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};
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#endif /* nsUTF16ToUnicode_h_ */
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