[개발/VC++] MultibyteToUTF8, UTF8ToMultibyte

출처 : 인터넷


[utf8.h]

#ifndef UTF8_H
#define UTF8_H

int MultibyteToUTF8(const char* src,int nbyte,char** dest);
int UNICODE_encode(const char* src,int bytelen,unsigned short** unicode);
int UTF8_encode(const unsigned short* src,int srclen,char** multibyte);

int UTF8ToMultibyte(const char* src,int nbyte,char** dest);
int UNICODE_decode(const unsigned short* src,int srclen,char** multibyte);
int UTF8_decode(const char* src,int bytelen,unsigned short** unicode);

#endif


[utf8.cpp]

int MultibyteToUTF8(const char* src,int nbyte,char** dest)
{
    unsigned short* unicode=NULL;
    int strlen = UNICODE_encode(src,nbyte,&unicode);
    int ret = UTF8_encode(unicode,strlen,dest);
    delete[] unicode;
    return ret;
}

int UNICODE_encode(const char* src,int bytelen,unsigned short** unicode)
{
    if(src == NULL || bytelen == 0 || IsBadReadPtr(src,bytelen) == TRUE)
    {
        *unicode = NULL;
        return 0;  
    }
    int nLen = MultiByteToWideChar(CP_ACP,0,src,bytelen,NULL,NULL);
   
    if(nLen == 0)
    {
        *unicode = NULL;
        return 0;
    }

    *unicode = new unsigned short[nLen+1];
    if(*unicode == NULL || IsBadWritePtr(*unicode,(nLen+1)*sizeof(unsigned short)) == TRUE)
    {
        *unicode = NULL;
        return 0;
    }

    ZeroMemory(*unicode,nLen*sizeof(unsigned short)+2);
    MultiByteToWideChar(CP_ACP,0,src,bytelen,*unicode,nLen);
    return nLen;
}

int UTF8_encode(const unsigned short* src,int srclen,char** multibyte)
{
    if(src == NULL || srclen == 0 || IsBadReadPtr(src,srclen*sizeof(unsigned short)) == TRUE)
    {
        *multibyte = NULL;
        return 0;  
    }

    int nLen = WideCharToMultiByte(CP_UTF8,0,src,srclen,*multibyte,0,NULL,NULL);
   
    if(nLen == 0)
    {
        *multibyte = NULL;
        return 0;
    }

    *multibyte = new char[nLen+1];

    if(*multibyte == NULL || IsBadWritePtr(*multibyte,nLen+1) == TRUE)
    {
        *multibyte = NULL;
        return 0;
    }

    ZeroMemory(*multibyte,nLen+1);
    WideCharToMultiByte(CP_UTF8,0,src,srclen,*multibyte,nLen,NULL,NULL);
    return nLen;
}

int UTF8ToMultibyte(const char* src,int nbyte,char** dest)
{
    unsigned short* unicode=NULL;
    int strlen = UTF8_decode(src,nbyte,&unicode);
    int ret = UNICODE_decode(unicode,strlen,dest);
    delete[] unicode;
    return ret;
}

int UNICODE_decode(const unsigned short* src,int srclen,char** multibyte)
{
    if(src == NULL || srclen == 0 || IsBadReadPtr(src,srclen*sizeof(unsigned short)) == TRUE)
    {
        *multibyte = NULL;
        return 0;  
    }
   
    int nLen = WideCharToMultiByte(CP_ACP,0,src,srclen,*multibyte,0,NULL,NULL);

    if(nLen == 0)
    {
        *multibyte = NULL;
        return 0;
    }

    *multibyte = new char[nLen+1];

    if(*multibyte == NULL || IsBadWritePtr(*multibyte,nLen+1) == TRUE)
    {
        *multibyte = NULL;
        return 0;
    }

    ZeroMemory(*multibyte,nLen+1);
    WideCharToMultiByte(CP_ACP,0,src,srclen,*multibyte,nLen,NULL,NULL);
    return nLen;
}

int UTF8_decode(const char* src,int bytelen,unsigned short** unicode)
{
   
    if(src == NULL || bytelen == 0 || IsBadReadPtr(src,bytelen) == TRUE)
    {
        *unicode = NULL;
        return 0;  
    }

    int nLen = MultiByteToWideChar(CP_UTF8,0,src,bytelen,NULL,NULL);

    if(nLen == 0)
    {
        *unicode = NULL;
        return 0;
    }

    *unicode = new unsigned short[nLen+1];

    if(*unicode == NULL || IsBadWritePtr(*unicode,(nLen+1)*sizeof(unsigned short)) == TRUE)
    {
        *unicode = NULL;
        return 0;
    }

    ZeroMemory(*unicode,nLen*sizeof(unsigned short)+2);
    MultiByteToWideChar(CP_UTF8,0,src,bytelen,*unicode,nLen);
    return nLen;
}