len

#!/bin/bash
source /home/fabian/d/programs/bash_scripts/sane

# split arguments and on \n, but not on spaces
IFS=$'\n'
# disable * expansion
set -f
if [[ "$1" =~ ^(\-\-?|\/)?(h(elp)?|\?)$ && "$2" == "" ]]; then
 wrap "Counts characters in a string. Like \"wc -m\", but without counting escape sequences."
 wrap "Only the longest line length will be returned, in case of line breaks or multiple arguments."
 wrap "Example usage:"
 echo "len \"a\\\\nbcd\\\\ne f\" \"ghij\\\\ng\\\\e[101mh\\\\e[0mi\""
 echo "Output:"
 len "a\nbcd\ne f" "ghij\ng\e[101mh\e[0mi"
 wrap "Here the length of the line \"ghij\" was returned."
 exit
fi
max=0
for line in $*; do
 arr=($(echo -n "$line" | sed "s/(.)/\\1\\n/g"))
 esc=0
 for((pos=0; pos<${#arr[@]}; pos++)); do
  # "\em"…
  if [[ "${arr[pos]}" == $'\e' ]]; then
   ((esc+=2))
   ((pos++))
   # "\e[m"…
   if [[ "${arr[pos]}" == "[" ]]; then
    ((esc++))
    ((pos++))
    # "\e[0m"…/"\e[93m"…/"\e[101m"…
    while [[ "${arr[pos]}" =~ [0-9] ]]; do
     ((esc++))
     ((pos++))
    done
   fi
  fi
 done
 ((max=${#arr[@]}-esc>max?${#arr[@]}-esc:max))
done
echo $max