bool NewFileName(const char* filename){    size_t len;    if (0 < (len = strlen(filename)))    {        char* tmpbuf, *p, c;        tmpbuf = (char*)malloc(len + 1);        strcpy_s(tmpbuf, len + 1, filename);        for (p = tmpbuf; *p; ++p)        {            if ('\\' != *p && '/' != *p)            {                continue;            }            c = *++p;            *p = '\0';            if ((_access(tmpbuf, 0)) != 0)            {                if (0 != _mkdir(tmpbuf))                {                    break;                }            }            *p = c;        }        {            FILE* file;            free(tmpbuf);            if (0 == _tfopen_s(&file, filename, _T("a")))            {                fclose(file);                return true;            }        }    }    return false;}