Discussion on: What was your win this week?

[David Wickes]

this

#!/bin/bash
#
# bconv
#
# converts integers from one base to another
# defaults to base 10 for input and base 10 for output
# bases in the range of 2 to 16 only

i_flag='10'
o_flag='10'

print_usage() {
  printf "Usage: bconv [-i input_base] [-o output_base] number\n"
}

while getopts ':i:o:h' flag; do
  case "${flag}" in
    i) i_flag="$OPTARG";;
    o) o_flag="$OPTARG";;
    h) print_usage
       exit 0 ;;
  esac
done
shift $((OPTIND-1))

if [ "$1" == "" ]; then
  print_usage
  exit 1
fi

# clean the input - dc can only accept upper case letters for numbers
input=$(echo $1| tr '[:lower:]' '[:upper:]')

# use dc(1) for the calculation
dc -e "$o_flag o $i_flag i $input p"

Been reading/writing about dc(1) and thought I'd try and build something with it... it's probably easier just to remember

dc -e '2 o 16 i DEADBEEF p'

but it was fun