Function warning

src/ugrep.cpp:15315–15334

print to standard error: warning message if -s and -q not specified, display error if errno is set, like perror()

// print to standard error: warning message if -s and -q not specified, display error if errno is set, like perror()
void warning(const char *message, const char *arg)
{
  if (!flag_no_messages)
  {
    const char *errmsg = NULL;
    if (errno)
    {
      // use safe strerror_s() instead of strerror() when available
#if defined(__STDC_LIB_EXT1__) || defined(OS_WIN)
      char errbuf[256];
      strerror_s(errbuf, sizeof(errbuf), errno);
      errmsg = errbuf;
#else
      errmsg = strerror(errno);
#endif
    }
    fprintf(Static::errout, "%sugrep: %swarning:%s %s%s%s%s%c%s %s%s%s\n", color_off, color_warning, color_off, color_high, message != NULL ? message : "", message != NULL ? " " : "", arg != NULL ? arg : "", errmsg != NULL ? ':' : ' ', color_off, color_message, errmsg != NULL ? errmsg : "", color_off);
  }
  ++Static::warnings;
}

// print to standard error: error message, assumes errno is set, like perror(), then exit
void error(const char *message, const char *arg)