b2d

#!/bin/sh
#
#   base-convert - Copyright (C) 2002 Murray Nesbitt (websrc@nesbitt.ca)
#
#   This program is protected and licensed under the following terms and
#   conditions: 1) it may not be redistributed in binary form without the
#   explicit permission of the author; 2) when redistributed in source
#   form, in whole or in part, this complete copyright statement must
#   remain intact.

if [ "$1" = "" ]
then
    read arg
else
    arg=$1
fi

if [ "$arg" = "" ] || [ "$2" != "" ]
then
    echo "Usage: $0 num"
    echo "Example: b2d 10001 converts binary => decimal (17)"
    echo "         h2o FF    converts hexadecimal => octal (377)"
    echo "         d2h 128   converts decimal => hexadecimal (80)"
    exit 1;
fi

arg=`echo $arg | tr a-f- A-F_`

case $0 in
    *b2d) prog="10o2i${arg}p" ;;
    *b2h) prog="16o2i${arg}p" ;;
    *b2o) prog="8o2i${arg}p" ;;
    *d2b) prog="2o10i${arg}p" ;;
    *d2h) prog="16o10i${arg}p" ;;
    *d2o) prog="8o10i${arg}p" ;;
    *h2b) prog="2o16i${arg}p" ;;
    *h2d) prog="10o16i${arg}p" ;;
    *h2o) prog="8o16i${arg}p" ;;
    *o2b) prog="2o8i${arg}p" ;;
    *o2d) prog="10o8i${arg}p" ;;
    *o2h) prog="16o8i${arg}p" ;;
    *) echo "$0: who the hell am I?"
esac

echo $prog | dc