在原来原基础上,将代码整理,并加强安全性. 并按照WindowsAPI设计, 添加输出缓冲长度探测功能
当OutUTFString为NULL时, 可以进行输出的UTF8字符串长度探测
1: uint32 UniCharToUTF8(wchar_t UniChar, char *OutUTFString)
2: {
3:
4: uint32 UTF8CharLength = 0;
5:
6: if (UniChar < 0x80)
7: {
8: if ( OutUTFString )
9: OutUTFString[UTF8CharLength++] = (char)UniChar;
10: else
11: UTF8CharLength++;
12: }
13: else if(UniChar < 0x800)
14: {
15: if ( OutUTFString )
16: {
17: OutUTFString[UTF8CharLength++] = 0xc0 | ( UniChar >> 6 );
18: OutUTFString[UTF8CharLength++] = 0x80 | ( UniChar & 0x3f );
19: }
20: else
21: {
22: UTF8CharLength += 2;
23: }
24: }
25: else if(UniChar < 0x10000 )
26: {
27: if ( OutUTFString )
28: {
29: OutUTFString[UTF8CharLength++] = 0xe0 | ( UniChar >> 12 );
30: OutUTFString[UTF8CharLength++] = 0x80 | ( (UniChar >> 6) & 0x3f );
31: OutUTFString[UTF8CharLength++] = 0x80 | ( UniChar & 0x3f );
32: }
33: else
34: {
35: UTF8CharLength += 3;
36: }
37: }
38: else if( UniChar < 0x200000 )
39: {
40: if ( OutUTFString )
41: {
42: OutUTFString[UTF8CharLength++] = 0xf0 | ( (int)UniChar >> 18 );
43: OutUTFString[UTF8CharLength++] = 0x80 | ( (UniChar >> 12) & 0x3f );
44: OutUTFString[UTF8CharLength++] = 0x80 | ( (UniChar >> 6) & 0x3f );
45: OutUTFString[UTF8CharLength++] = 0x80 | ( UniChar & 0x3f );
46: }
47: else
48: {
49: UTF8CharLength += 4;
50: }
51:
52: }
53:
54: return UTF8CharLength;
55: }
当OutUnicodeString为NULL时, 可以进行输出的Unicode字符串长度探测
1: uint32 UTF8StrToUnicode( const char* UTF8String, uint32 UTF8StringLength, wchar_t* OutUnicodeString, uint32 UnicodeStringBufferSize )
2: {
3: uint32 UTF8Index = 0;
4: uint32 UniIndex = 0;
5:
6: while ( UTF8Index < UTF8StringLength )
7: {
8: unsigned char UTF8Char = UTF8String[UTF8Index];
9:
10: if ( UnicodeStringBufferSize != 0 && UniIndex >= UnicodeStringBufferSize )
11: break;
12:
13: if ((UTF8Char & 0x80) == 0)
14: {
15: const uint32 cUTF8CharRequire = 1;
16:
17: // UTF8字码不足
18: if ( UTF8Index + cUTF8CharRequire > UTF8StringLength )
19: break;
20:
21: if ( OutUnicodeString )
22: {
23: wchar_t& WideChar = OutUnicodeString[UniIndex];
24:
25: WideChar = UTF8Char;
26: }
27:
28: UTF8Index++;
29:
30: }
31: else if((UTF8Char & 0xE0) == 0xC0) ///< 110x-xxxx 10xx-xxxx
32: {
33: const uint32 cUTF8CharRequire = 2;
34:
35: // UTF8字码不足
36: if ( UTF8Index + cUTF8