1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
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_ */
|
