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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
// UTFConvert.cpp
#include "StdAfx.h"
#include "MyTypes.h"
#include "UTFConvert.h"
static const Byte kUtf8Limits[5] = { 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
bool CheckUTF8(const char *src) throw()
{
for (;;)
{
Byte c;
unsigned numAdds;
c = *src++;
if (c == 0)
return true;
if (c < 0x80)
continue;
if (c < 0xC0)
return false;
for (numAdds = 1; numAdds < 5; numAdds++)
if (c < kUtf8Limits[numAdds])
break;
UInt32 value = (c - kUtf8Limits[numAdds - 1]);
do
{
Byte c2 = *src++;
if (c2 < 0x80 || c2 >= 0xC0)
return false;
value <<= 6;
value |= (c2 - 0x80);
}
while (--numAdds);
if (value >= 0x110000)
return false;
}
}
static Bool Utf8_To_Utf16(wchar_t *dest, size_t *destLen, const char *src, size_t srcLen) throw()
{
size_t destPos = 0, srcPos = 0;
for (;;)
{
Byte c;
unsigned numAdds;
if (srcPos == srcLen)
{
*destLen = destPos;
return True;
}
c = (Byte)src[srcPos++];
if (c < 0x80)
{
if (dest)
dest[destPos] = (wchar_t)c;
destPos++;
continue;
}
if (c < 0xC0)
break;
for (numAdds = 1; numAdds < 5; numAdds++)
if (c < kUtf8Limits[numAdds])
break;
UInt32 value = (c - kUtf8Limits[numAdds - 1]);
do
{
Byte c2;
if (srcPos == srcLen)
break;
c2 = (Byte)src[srcPos++];
if (c2 < 0x80 || c2 >= 0xC0)
break;
value <<= 6;
value |= (c2 - 0x80);
}
while (--numAdds);
if (value < 0x10000)
{
if (dest)
dest[destPos] = (wchar_t)value;
destPos++;
}
else
{
value -= 0x10000;
if (value >= 0x100000)
break;
if (dest)
{
dest[destPos + 0] = (wchar_t)(0xD800 + (value >> 10));
dest[destPos + 1] = (wchar_t)(0xDC00 + (value & 0x3FF));
}
destPos += 2;
}
}
*destLen = destPos;
return False;
}
static Bool Utf16_To_Utf8(char *dest, size_t *destLen, const wchar_t *src, size_t srcLen)
{
size_t destPos = 0, srcPos = 0;
for (;;)
{
unsigned numAdds;
UInt32 value;
if (srcPos == srcLen)
{
*destLen = destPos;
return True;
}
value = src[srcPos++];
if (value < 0x80)
{
if (dest)
dest[destPos] = (char)value;
destPos++;
continue;
}
if (value >= 0xD800 && value < 0xE000)
{
UInt32 c2;
if (value >= 0xDC00 || srcPos == srcLen)
break;
c2 = src[srcPos++];
if (c2 < 0xDC00 || c2 >= 0xE000)
break;
value = (((value - 0xD800) << 10) | (c2 - 0xDC00)) + 0x10000;
}
for (numAdds = 1; numAdds < 5; numAdds++)
if (value < (((UInt32)1) << (numAdds * 5 + 6)))
break;
if (dest)
dest[destPos] = (char)(kUtf8Limits[numAdds - 1] + (value >> (6 * numAdds)));
destPos++;
do
{
numAdds--;
if (dest)
dest[destPos] = (char)(0x80 + ((value >> (6 * numAdds)) & 0x3F));
destPos++;
}
while (numAdds != 0);
}
*destLen = destPos;
return False;
}
bool ConvertUTF8ToUnicode(const AString &src, UString &dest)
{
dest.Empty();
size_t destLen = 0;
Utf8_To_Utf16(NULL, &destLen, src, src.Len());
Bool res = Utf8_To_Utf16(dest.GetBuffer((unsigned)destLen), &destLen, src, src.Len());
dest.ReleaseBuffer((unsigned)destLen);
return res ? true : false;
}
bool ConvertUnicodeToUTF8(const UString &src, AString &dest)
{
dest.Empty();
size_t destLen = 0;
Utf16_To_Utf8(NULL, &destLen, src, src.Len());
Bool res = Utf16_To_Utf8(dest.GetBuffer((unsigned)destLen), &destLen, src, src.Len());
dest.ReleaseBuffer((unsigned)destLen);
return res ? true : false;
}
|
