# extract data from a xml file
xml_file=$1
output_file=$2
inter_file="inter.txt"
capacity=$(xpath -q -e "//periodic_task/capacity/text()" "$xml_file" |tr '\n' ','|sed 's/,$//')
deadline=$(xpath -q -e "//periodic_task/deadline/text()" "$xml_file" |tr '\n' ','|sed 's/,$//')
period=$(xpath -q -e "//periodic_task/period/text()" "$xml_file" |tr '\n' ','|sed 's/,$//')
priority=$(xpath -q -e "//periodic_task/priority/text()" "$xml_file" |tr '\n' ','|sed 's/,$//')

echo "$capacity" > "$inter_file"
echo "$deadline" >> "$inter_file"
echo "$period" >> "$inter_file"
echo "$priority" >> "$inter_file"

column=$(awk -F, '{printf "%d",NF; exit}' "$inter_file")
for ((i=1;i<=$column;i++))
 do
  value=$(awk -v col=$i -F, '{if(NR==1){printf "%d",$col}else{printf ",%d", $col}}' "$inter_file")
  if (($i==1)); then
      echo $value > $output_file
    else 
      echo $value >> $output_file
  fi

done