刘策(liuce)

UTF8文本头为 EF BB BF
UTF16 文本头: Big-Endian的FEFF; 表明这个字节流是；Little-Endian的FFFE

int convertUTF8UTF16(unsigned char* utf8, int& size8, char* utf16, int& size16)

{

    int count =0, i;

    char tmp1, tmp2;

    unsigned short int integer;

    unsigned short int *p;

    for(i=0;i
    {   

        p = (unsigned short int*)&utf16[i];

       

        if( utf8[count] < 0x80)

        {

            // <0x80

            integer = utf8[count];           

            count++;

        }

        else if( (utf8[count] < 0xDF) && (utf8[count]>=0x80))

        {

            integer = utf8[count] & 0x1F;

            integer = integer << 6;

            integer += utf8[count+1] &0x3F;

            count+=2;

        }

        else if( (utf8[count] <= 0xEF) && (utf8[count]>=0xDF))

        {

            integer = utf8[count] & 0x0F;

            integer = integer << 6;

            integer += utf8[count+1] &0x3F;

            integer = integer << 6;

            integer += utf8[count+2] &0x3F;

            count+=3;

        }

        else

        {

            printf("error!\n");

        }

        *p = integer;

    }

    size8 = count;

    size16 = i;

    return size16;

}

int convertUTF16UTF8(char* utf16, int& size16, char* utf8, int& size8)

{

    int i=0, count=0;

    char tmp1, tmp2;

   

    unsigned short int integer;

    for(i=0;i
    {   

        integer = *(unsigned short int*)&utf16[i];

       

        if( integer<0x80)

        {           

            utf8[count] = utf16[i] & 0x7f;

            count++;

        }

        else if( integer>=0x80 && integer<0x07ff)

        {

            tmp1 = integer>>6;

            utf8[count] = 0xC0 | (0x1F & integer>>6);

            utf8[count+1] = 0x80 | (0x3F & integer);

            count+=2;

        }

        else if( integer>=0x0800 )

        {           

            tmp1 = integer>>12;

            utf8[count] = 0xE0 | (0x0F & integer>>12);

            utf8[count+1] = 0x80 | ((0x0FC0 & integer)>>6);

            utf8[count+2] = 0x80 | (0x003F & integer);

           

            count += 3;

        }   

        else

        {

            printf("error\n");

        }

    }

    size16 = i;

    size8  = count;

    return count;

}