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nsUnicodeToUCS2BE.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
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00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is Mozilla Communicator client code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
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00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
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00037 
00038 #ifndef nsUnicodeToUCS2BE_h___
00039 #define nsUnicodeToUCS2BE_h___
00040 
00041 #include "nsUCSupport.h"
00042 
00043 class nsUnicodeToUTF16BE: public nsBasicEncoder
00044 {
00045 public:
00046   nsUnicodeToUTF16BE() { mBOM = 0;};
00047 
00048   //--------------------------------------------------------------------
00049   // Interface nsIUnicodeEncoder [declaration]
00050 
00051   NS_IMETHOD Convert(const PRUnichar * aSrc, PRInt32 * aSrcLength, 
00052       char * aDest, PRInt32 * aDestLength);
00053   NS_IMETHOD GetMaxLength(const PRUnichar * aSrc, PRInt32 aSrcLength, 
00054       PRInt32 * aDestLength);
00055   NS_IMETHOD Finish(char * aDest, PRInt32 * aDestLength);
00056   NS_IMETHOD Reset();
00057   NS_IMETHOD SetOutputErrorBehavior(PRInt32 aBehavior, 
00058       nsIUnicharEncoder * aEncoder, PRUnichar aChar);
00059 
00060   //--------------------------------------------------------------------
00061   // Interface nsICharRepresentable [declaration]
00062   NS_IMETHOD FillInfo(PRUint32 *aInfo);
00063 
00064 protected:
00065   PRUnichar mBOM;
00066   NS_IMETHOD CopyData(char* aDest, const PRUnichar* aSrc, PRInt32 aLen  );
00067 };
00068 
00069 class nsUnicodeToUTF16LE: public nsUnicodeToUTF16BE
00070 {
00071 public:
00072   nsUnicodeToUTF16LE() { mBOM = 0;};
00073 
00074 protected:
00075   NS_IMETHOD CopyData(char* aDest, const PRUnichar* aSrc, PRInt32 aLen  );
00076 };
00077 
00078 // XXX In theory, we have to check the endianness at run-time because some
00079 // modern RISC processors can be run at both LE and BE. 
00080 #ifdef IS_LITTLE_ENDIAN
00081 class nsUnicodeToUTF16: public nsUnicodeToUTF16LE
00082 #elif defined(IS_BIG_ENDIAN)
00083 class nsUnicodeToUTF16: public nsUnicodeToUTF16BE
00084 #else
00085 #error "Unknown endianness"
00086 #endif
00087 {
00088 public:
00089   nsUnicodeToUTF16() { mBOM = 0xFEFF;};
00090 };
00091 
00092 #endif /* nsUnicodeToUCS2BE_h___ */