Away:Module-math
From The Commonwealth of Acropolis
More actions
#!/usr/bin/env bash
code=("$@")
bc_mathlib() {
echo "scale=40; ${1} (${code[1]})" | bc -l
}
bc_biterm() {
echo "scale=40; ${code[1]} ${1} ${code[2]}" | bc
}
case $1 in
sum)
echo "${code[@]:1}" | awk -F" " '{for(i=1; i<=NF; i++) s+=$i} END {print s}'
;;
sin)
bc_mathlib s
;;
cos)
bc_mathlib c
;;
atan)
bc_mathlib a
;;
ln)
bc_mathlib l
;;
epow)
bc_mathlib e
;;
pi)
printf "4*a(1)\n" | bc -l
;;
neg)
printf "- %s\n" "${code[1]}" | bc
;;
add)
bc_biterm "+"
;;
sub)
bc_biterm "-"
;;
mul)
bc_biterm "*"
;;
div)
bc_biterm "/"
;;
mod)
bc_biterm "%"
;;
pow)
bc_biterm "^"
;;
lt)
bc_biterm "<"
;;
lte)
bc_biterm "<="
;;
gt)
bc_biterm ">"
;;
gte)
bc_biterm ">="
;;
eq)
bc_biterm "=="
;;
neq)
bc_biterm "!="
;;
not)
printf "!%s\n" "${code[1]}" | bc
;;
and)
bc_biterm "&&"
;;
or)
bc_biterm "||"
;;
sigfig)
printf "length ( %s )\n" "${code[1]}" | bc
;;
sqrt)
printf "sqrt ( %s )\n" "${code[1]}" | bc
;;
esac