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한글(MBCS) <-> UTF-8인코딩 2009. 2. 22. 16:12
CString EncodeToUTF8(LPCTSTR szSource)
{
WORD ch;
BYTE bt1, bt2, bt3, bt4, bt5, bt6;
int n, nMax = _tcslen(szSource);
CString sFinal, sTemp;
for (n = 0; n < nMax; ++n)
{
ch = (WORD)szSource[n];
if (ch == _T('='))
{
sTemp.Format(_T("=%02X"), ch);
sFinal += sTemp;
}
else if (ch < 128)
{
sFinal += szSource[n];
}
else if (ch <= 2047)
{
bt1 = (BYTE)(192 + (ch / 64));
bt2 = (BYTE)(128 + (ch % 64));
sTemp.Format(_T("=%02X=%02X"), bt1, bt2);
sFinal += sTemp;
}
else if (ch <= 65535)
{
bt1 = (BYTE)(224 + (ch / 4096));
bt2 = (BYTE)(128 + ((ch / 64) % 64));
bt3 = (BYTE)(128 + (ch % 64));
sTemp.Format(_T("=%02X=%02X=%02X"), bt1, bt2, bt3);
sFinal += sTemp;
}
else if (ch <= 2097151)
{
bt1 = (BYTE)(240 + (ch / 262144));
bt2 = (BYTE)(128 + ((ch / 4096) % 64));
bt3 = (BYTE)(128 + ((ch / 64) % 64));
bt4 = (BYTE)(128 + (ch % 64));
sTemp.Format(_T("=%02X=%02X=%02X=%02X"), bt1, bt2, bt3, bt4);
sFinal += sTemp;
}
else if (ch <=67108863)
{
bt1 = (BYTE)(248 + (ch / 16777216));
bt2 = (BYTE)(128 + ((ch / 262144) % 64));
bt3 = (BYTE)(128 + ((ch / 4096) % 64));
bt4 = (BYTE)(128 + ((ch / 64) % 64));
bt5 = (BYTE)(128 + (ch % 64));
sTemp.Format(_T("=%02X=%02X=%02X=%02X=%02X"), bt1, bt2, bt3, bt4, bt5);
sFinal += sTemp;
}
else if (ch <=2147483647)
{
bt1 = (BYTE)(252 + (ch / 1073741824));
bt2 = (BYTE)(128 + ((ch / 16777216) % 64));
bt3 = (BYTE)(128 + ((ch / 262144) % 64));
bt4 = (BYTE)(128 + ((ch / 4096) % 64));
bt5 = (BYTE)(128 + ((ch / 64) % 64));
bt6 = (BYTE)(128 + (ch % 64));
sTemp.Format(_T("=%02X=%02X=%02X=%02X=%02X=%02X"), bt1, bt2, bt3, bt4, bt5, bt6);
sFinal += sTemp;
}
}
return sFinal;
}
/*
or
#include <atlbase.h>
#include <atlconv.h>
char *MultiByteToUTF8( const char *in )
{
USES_CONVERSION;
wchar_t *wc = A2W( in );
char *buffer;
int nLen = WideCharToMultiByte( CP_UTF8, 0, wc, -1, NULL, 0, 0, 0 );
buffer = (char *)malloc(nLen);
WideCharToMultiByte( CP_UTF8, 0, wc, -1, buffer, nLen, 0, 0 );
return buffer;
}
*/
// helper function for decoding
BYTE MakeByte(TCHAR ch1, TCHAR ch2)
{
BYTE bt1 = 0, bt2 = 0;
switch (ch2)
{
case _T('0'):
bt2 = 0x00;
break;
case _T('1'):
bt2 = 0x01;
break;
case _T('2'):
bt2 = 0x02;
break;
case _T('3'):
bt2 = 0x03;
break;
case _T('4'):
bt2 = 0x04;
break;
case _T('5'):
bt2 = 0x05;
break;
case _T('6'):
bt2 = 0x06;
break;
case _T('7'):
bt2 = 0x07;
break;
case _T('8'):
bt2 = 0x08;
break;
case _T('9'):
bt2 = 0x09;
break;
case _T('A'):
bt2 = 0x0A;
break;
case _T('B'):
bt2 = 0x0B;
break;
case _T('C'):
bt2 = 0x0C;
break;
case _T('D'):
bt2 = 0x0D;
break;
case _T('E'):
bt2 = 0x0E;
break;
case _T('F'):
bt2 = 0x0F;
break;
}
switch (ch1)
{
case _T('0'):
bt1 = 0x00;
break;
case _T('1'):
bt1 = 0x10;
break;
case _T('2'):
bt1 = 0x20;
break;
case _T('3'):
bt1 = 0x30;
break;
case _T('4'):
bt1 = 0x40;
break;
case _T('5'):
bt1 = 0x50;
break;
case _T('6'):
bt1 = 0x60;
break;
case _T('7'):
bt1 = 0x70;
break;
case _T('8'):
bt1 = 0x80;
break;
case _T('9'):
bt1 = 0x90;
break;
case _T('A'):
bt1 = 0xA0;
break;
case _T('B'):
bt1 = 0xB0;
break;
case _T('C'):
bt1 = 0xC0;
break;
case _T('D'):
bt1 = 0xD0;
break;
case _T('E'):
bt1 = 0xE0;
break;
case _T('F'):
bt1 = 0xF0;
break;
}
BYTE btFinal = bt2 | bt1;
return btFinal;
}
CString DecodeFromUTF8(LPCTSTR szSource)
{
TRACE(_T("\n"));
int n, nMax = _tcslen(szSource);
WORD ch;
CString sFinal, sTemp;
BYTE z, y, x, w, v, u;
for (n = 0; n < nMax; ++n)
{
ch = (WORD)szSource[n];
if (ch != _T('='))
{
sFinal += (TCHAR)ch;
continue;
}
if (n >= nMax - 2) break; // something is wrong
z = MakeByte(szSource[n+1], szSource[n+2]);
if (z < 127)
{
sFinal += (TCHAR)z;
n = n + 2;
}
else if (z >= 192 && z <= 223)
{
// character is two bytes
if (n >= nMax - 5) break; // something is wrong
y = MakeByte(szSource[n+4], szSource[n+5]);
sFinal += (TCHAR)( (z-192)*64 + (y-128) );
n = n + 5;
}
else if (z >= 224 && z <= 239)
{
// character is three bytes
if (n >= nMax - 8) break; // something is wrong
y = MakeByte(szSource[n+4], szSource[n+5]);
x = MakeByte(szSource[n+7], szSource[n+8]);
sFinal += (TCHAR)( (z-224)*4096 + (y-128)*64 + (x-128) );
n = n + 8;
}
else if (z >= 240 && z <= 247)
{
// character is four bytes
if (n >= nMax - 11) break; // something is wrong
y = MakeByte(szSource[n+4], szSource[n+5]);
x = MakeByte(szSource[n+7], szSource[n+8]);
w = MakeByte(szSource[n+10], szSource[n+11]);
sFinal += (TCHAR)( (z-240)*262144 + (y-128)*4096 + (x-128)*64 + (w-128) );
n = n + 11;
}
else if (z >= 248 && z <= 251)
{
// character is four bytes
if (n >= nMax - 14) break; // something is wrong
y = MakeByte(szSource[n+4], szSource[n+5]);
x = MakeByte(szSource[n+7], szSource[n+8]);
w = MakeByte(szSource[n+10], szSource[n+11]);
v = MakeByte(szSource[n+13], szSource[n+14]);
sFinal += (TCHAR)( (z-248)*16777216 + (y-128)*262144 + (x-128)*4096 + (w-128)*64 + (v-128) );
n = n + 14;
}
else if (z >= 252 && z <= 253)
{
// character is four bytes
if (n >= nMax - 17) break; // something is wrong
y = MakeByte(szSource[n+4], szSource[n+5]);
x = MakeByte(szSource[n+7], szSource[n+8]);
w = MakeByte(szSource[n+10], szSource[n+11]);
v = MakeByte(szSource[n+13], szSource[n+14]);
u = MakeByte(szSource[n+16], szSource[n+17]);
sFinal += (TCHAR)( (z-252)*1073741824 + (y-128)*16777216 + (x-128)*262144 + (w-128)*4096 + (v-128)*64 + (u-128) );
n = n + 17;
}
}
return sFinal;
}
/*
or
CString decode_utf8(LPCSTR utf8str)
{
int size = MultiByteToWideChar(CP_UTF8, 0, utf8str, -1, NULL, 0);
LPWSTR wStr = new WCHAR[size];
MultiByteToWideChar(CP_UTF8, 0, utf8str, -1, wStr, size);
USES_CONVERSION;
CString str = W2CT(wStr);
delete[] wStr;
return str;
}
*/
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