The Tor Browser: intl/uconv/ucvlatin/nsUTF16ToUnicode.h@fc2d59ddac77

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef nsUTF16ToUnicode_h_

     7 #define nsUTF16ToUnicode_h_

     9 #include "nsISupports.h"

    10 #include "nsUCSupport.h"

    12 // internal base class

    13 class nsUTF16ToUnicodeBase : public nsBasicDecoderSupport

    14 {

    15 protected:

    16   // ctor accessible only by child classes

    17   nsUTF16ToUnicodeBase() { Reset();}

    19   nsresult UTF16ConvertToUnicode(const char * aSrc,

    20                                  int32_t * aSrcLength, char16_t * aDest,

    21                                  int32_t * aDestLength, bool aSwapBytes);

    23 public:

    24   //--------------------------------------------------------------------

    25   // Subclassing of nsDecoderSupport class [declaration]

    27   NS_IMETHOD GetMaxLength(const char * aSrc, int32_t aSrcLength,

    28       int32_t * aDestLength);

    29   NS_IMETHOD Reset();

    31 protected:

    32   uint8_t mState;

    33   // to store an odd byte left over between runs

    34   uint8_t mOddByte;

    35   // to store an odd high surrogate left over between runs

    36   char16_t mOddHighSurrogate;

    37   // to store an odd low surrogate left over between runs

    38   char16_t mOddLowSurrogate;

    39 };

    41 // UTF-16 big endian

    42 class nsUTF16BEToUnicode : public nsUTF16ToUnicodeBase

    43 {

    44 public:

    46   NS_IMETHOD Convert(const char * aSrc, int32_t * aSrcLength,

    47       char16_t * aDest, int32_t * aDestLength);

    48 };

    50 // UTF-16 little endian

    51 class nsUTF16LEToUnicode : public nsUTF16ToUnicodeBase

    52 {

    53 public:

    55   NS_IMETHOD Convert(const char * aSrc, int32_t * aSrcLength,

    56       char16_t * aDest, int32_t * aDestLength);

    57 };

    59 // UTF-16 with BOM

    60 class nsUTF16ToUnicode : public nsUTF16ToUnicodeBase

    61 {

    62 public:

    64   nsUTF16ToUnicode() { Reset();}

    65   NS_IMETHOD Convert(const char * aSrc, int32_t * aSrcLength,

    66       char16_t * aDest, int32_t * aDestLength);

    68   NS_IMETHOD Reset();

    70 private:

    72   enum Endian {kUnknown, kBigEndian, kLittleEndian};

    73   Endian  mEndian;

    74   bool    mFoundBOM;

    75 };

    77 #endif /* nsUTF16ToUnicode_h_ */

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