search_unicode

#!/bin/bash

function help
{
  cat <<EOH
For each term search unicode character where its definition contain the term.
Usage: $0 [-h] [-l] [-r] term1 term2
  -h this help
  -l large description
  -r choose a random character
EOH
  exit 1
}
UNICODEDATA="/usr/share/unicode/UnicodeData.txt"

[ -f "$UNICODEDATA" ] || 
{ 
  echo "File $UNICODEDATA not found," >&2
  echo "Install \"unicode-data\" (at least at Debian), and try again" >&2
  exit 1 
}

while getopts hlr opt;
do
  case $opt in
    h) help ;;
    l) large=1 ;;
    r) randomized=1 ;;
  esac
done
shift $((OPTIND-1))

declare -A chars
for a in "$@"
do
  chars[$a]="$(sed 's,;, ,g' $UNICODEDATA | awk -v c="$a" \
    'BEGIN {IGNORECASE=1;} $0 ~ c {print $1;}' )"

  if [ "$randomized" = 1 ]
  then
    chars[$a]="$(echo "${chars[$a]}" | sort -R | head -n 1)"
  fi
done
for a in "$@"
do
  for c in ${chars[$a]}
  do
    if [ "$large" = 1 ]
    then
      printf "\U$c $(grep "^$c;" $UNICODEDATA)\n"
    else
      printf "\U$c "
    fi
  done | sed 's, $,\n,'
done

# vim: tabstop=2 shiftwidth=2 expandtab