char_to_wchar 字符编码

static int char_to_wchar(const char* orig_str, wchar_t *wtext, int max_length)
{
     int nCoverLen = 0;    
     //add by shenbo
     setlocale(LC_ALL, "zh_CN.utf8");    
     nCoverLen = mbstowcs(wtext, orig_str, max_length - 1); 

      
     if(-1 == nCoverLen){    

       perror("mbstowcs");

        return -1;
     }       

     if(wcscat(wtext, L"") == NULL) {
                perror("wcscat");
                return -1;
      }        
        return nCoverLen;
}


if(char_to_wchar(optarg,stream_text_info[stream_id].textbox[area_id].content,  sizeof(stream_text_info[stream_id].textbox[area_id].content)) < 0) 
{
        printf("Convert to wchar failed. Use default   string.\n");
        memset(stream_text_info[stream_id].textbox[area_id].content, 0,
        sizeof(stream_text_info[stream_id].textbox[area_id].content));
}

wchar_t                         //字符编码