处理中文字符相关的函数

//如果检测到多字节字符，返回1，否则返回0
bool CCommonTool::hasMultiBytes(const char *pSrc)
{
for (uint16 i = 0; i < strlen(pSrc); i ++)
if (*(pSrc+i) & 0x80)
return true;
return false;
}

std::string CCommonTool::multibyteSub( const std::string src, const int sub_num )
{
const char *pSrc = src.c_str();
int multibyte_num = 0;
std::string dest;

for (uint16 i = 0; i < sub_num; i++)
if (*(pSrc + i) & 0x80)//中文字符
{
multibyte_num++;
}

if (multibyte_num % 2 != 0)
dest = src.substr(0, sub_num - 1);
else
dest = src.substr(0, sub_num);

return dest;
}

wchar_t* CCommonTool::char2wchar_t( const char *src )
{
int length = strlen(src)+1;
wchar_t *dst = (wchar_t*)malloc(sizeof(wchar_t)*length);
memset(dst,0,length*sizeof(wchar_t));
MultiByteToWideChar(CP_ACP, 0, src, strlen(src), dst, length);
return dst;
}