1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
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10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is Mozilla Communicator client code.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 1998
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either of the GNU General Public License Version 2 or later (the "GPL"),
26 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
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36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : #ifndef nsUCS2BEToUnicode_h___
39 : #define nsUCS2BEToUnicode_h___
40 :
41 : #include "nsISupports.h"
42 : #include "nsUCSupport.h"
43 :
44 : // internal base class
45 : class nsUTF16ToUnicodeBase : public nsBasicDecoderSupport
46 290 : {
47 : protected:
48 : // ctor accessible only by child classes
49 145 : nsUTF16ToUnicodeBase() { Reset();}
50 :
51 : public:
52 : //--------------------------------------------------------------------
53 : // Subclassing of nsDecoderSupport class [declaration]
54 :
55 : NS_IMETHOD GetMaxLength(const char * aSrc, PRInt32 aSrcLength,
56 : PRInt32 * aDestLength);
57 : NS_IMETHOD Reset();
58 :
59 : protected:
60 : PRUint8 mState;
61 : // to store an odd byte left over between runs
62 : PRUint8 mOddByte;
63 : // to store an odd high surrogate left over between runs
64 : PRUnichar mOddHighSurrogate;
65 : // to store an odd low surrogate left over between runs
66 : PRUnichar mOddLowSurrogate;
67 : };
68 :
69 : // UTF-16 big endian
70 : class nsUTF16BEToUnicode : public nsUTF16ToUnicodeBase
71 310 : {
72 : public:
73 :
74 : NS_IMETHOD Convert(const char * aSrc, PRInt32 * aSrcLength,
75 : PRUnichar * aDest, PRInt32 * aDestLength);
76 : };
77 :
78 : // UTF-16 little endian
79 : class nsUTF16LEToUnicode : public nsUTF16ToUnicodeBase
80 305 : {
81 : public:
82 :
83 : NS_IMETHOD Convert(const char * aSrc, PRInt32 * aSrcLength,
84 : PRUnichar * aDest, PRInt32 * aDestLength);
85 : };
86 :
87 : // UTF-16 with BOM
88 : class nsUTF16ToUnicode : public nsUTF16ToUnicodeBase
89 88 : {
90 : public:
91 :
92 22 : nsUTF16ToUnicode() { Reset();}
93 : NS_IMETHOD Convert(const char * aSrc, PRInt32 * aSrcLength,
94 : PRUnichar * aDest, PRInt32 * aDestLength);
95 :
96 : NS_IMETHOD Reset();
97 :
98 : private:
99 :
100 : enum Endian {kUnknown, kBigEndian, kLittleEndian};
101 : Endian mEndian;
102 : bool mFoundBOM;
103 : };
104 :
105 : #endif /* nsUCS2BEToUnicode_h___ */
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