tohex

   1 #!/bin/sh
   2
   3 conv() {
   4         while [ $# -gt 0 ]; do
   5                 if printf "%s" "$1" | grep -qE '^[0-9]+$'; then
   6                         if [ "$m" -eq 0 ]; then
   7                                 printf "Decimal %s → Hex: " "$1"
   8                         fi
   9                         printf "%s%X\n" "$p" "$1"
  10
  11                 elif printf "%s" "$1" | grep -qE '^0b[0-1]+$'; then
  12                         if [ "$m" -eq 0 ]; then
  13                                 printf "Binary %s → Hex: " "$1"
  14                         fi
  15                         printf "%s%X\n" "$p" "$1"
  16
  17                 else
  18                         printf "Error: '%s' is not a valid binary or decimal number\n" "$1" >&2
  19                         stat=1
  20
  21                 fi
  22                 shift
  23         done
  24         return "$stat"
  25 }
  26
  27
  28 main() {
  29         USAGE="usage: ${0} [-lmnp] ..."
  30         if ! [ "$1" = "x" ] && ! [ -t 0 ]; then
  31                 cat | tr '\n' ' ' | xargs tohex "x" "$@"
  32                 return "$?"
  33
  34         elif [ "$1" = "x" ]; then
  35                 shift
  36
  37         fi
  38
  39         if [ $# -eq 0 ]; then
  40                 printf "Error: No arguments provided\n%s\n" "$USAGE" >&2
  41                 return 2
  42
  43         fi
  44
  45         stat=0
  46         l=0; m=0; n=0; p=""
  47         while getopts "lmnp" flag; do
  48                 case "$flag" in
  49                         l) l=1; ;;
  50                         m) m=1; ;;
  51                         n) n=1; ;;
  52                         p) p="0x" ;;
  53                         *) printf "%s\n" "$USAGE" >&2 ; return 2 ;;
  54                 esac
  55         done
  56
  57         shift $(( OPTIND - 1 ))
  58
  59         t=$(conv "$@")
  60         stat=$?
  61
  62         if [ "$n" -eq 1 ] && [ "$m" -eq 1 ]; then
  63                 t=$(printf "%s" "$t" | tr '\n' ' ')
  64
  65         elif [ "$n" -eq 1 ] && [ "$m" -eq 0 ]; then
  66                 t=$(printf "%s" "$t" | tr '\n' ';')
  67
  68         else
  69                 t=$(printf "%s" "$t")
  70
  71         fi
  72
  73         if [ "$l" -eq 1 ]; then
  74                 t=$(printf "%s" "$t" | tr '[:upper:]' '[:lower:]')
  75         fi
  76         printf "%s\n" "$t"
  77         return "$stat"
  78 }
  79
  80 main "$@"