Someone

patch_command='patch -p1 -F1 -s'
ApplyPatch()
{
  local patch=$1
  shift
  if [ ! -f $RPM_SOURCE_DIR/$patch ]; then
    exit 1;
  fi
  case "$patch" in
  *.bz2) bunzip2 < "$RPM_SOURCE_DIR/$patch" | $patch_command ${1+"$@"} ;;
  *.gz) gunzip < "$RPM_SOURCE_DIR/$patch" | $patch_command ${1+"$@"} ;;
  *) $patch_command ${1+"$@"} < "$RPM_SOURCE_DIR/$patch" ;;
  esac
}