#!/bin/bash
export LANG=ja_JP.CP932

# option alias map
declare -A OPT_ALIASES;
OPT_ALIASES["--regexp"]="-e";
OPT_ALIASES["--file"]="-f";
OPT_ALIASES["--ignore-case"]="-i";
OPT_ALIASES["--invert-match"]="-v";
OPT_ALIASES["--word-regexp"]="-w";
OPT_ALIASES["--line-regexp"]="-x";
OPT_ALIASES["--count"]="-c";
OPT_ALIASES["--colour"]="--color";
OPT_ALIASES["--files-without-match"]="-L";
OPT_ALIASES["--files-with-matches"]="-l";
OPT_ALIASES["--max-count"]="-m";
OPT_ALIASES["--only-matching"]="-o";
OPT_ALIASES["--quit"]="-q";
OPT_ALIASES["--silent"]="-q";
OPT_ALIASES["--no-messages"]="-s";
OPT_ALIASES["--byte-offset"]="-b";
OPT_ALIASES["--with-filename"]="-H";
OPT_ALIASES["--no-filename"]="-h";
OPT_ALIASES["--line-number"]="-n";
OPT_ALIASES["--initial-tab"]="-T";
OPT_ALIASES["--unix-byte-offsets"]="-u";
OPT_ALIASES["--null"]="-Z";
OPT_ALIASES["--after-context"]="-A";
OPT_ALIASES["--before-context"]="-B";
OPT_ALIASES["--context"]="-C";
OPT_ALIASES["--text"]="-a";
OPT_ALIASES["--devices"]="-D";
OPT_ALIASES["--directories"]="-d";
OPT_ALIASES["--recursive"]="-r";
OPT_ALIASES["--dereference-recursive"]="-R";
OPT_ALIASES["--binary"]="-U";
OPT_ALIASES["--null-data"]="-z";

# parse command line
declare -a files=()
declare -a opt_arr=()
declare -A opt_hash
declare unresolved_arg=""

function push_opt () {
    if [[ -v OPT_ALIASES[$1] ]]; then
        opt_hash[${OPT_ALIASES[$1]}]=$2;
    else
        opt_hash[$1]=$2;
    fi
}

for arg in "$@"; do
    # \ -> \\
    qarg="${arg//\\/\\\\}"
    # " -> \"
    qarg="${qarg//\"/\\\"}"

    if [[ -n $unresolved_arg ]]; then # -prev curr
        options+=($unresolved_arg);
        options+=("$qarg");
        push_opt $unresolved_arg "$qarg";
        unresolved_arg="";
    elif [[ ${arg} =~ ^(--[^=]+)=(.*)$ ]]; then # --???=???
        options+=("$qarg");
        push_opt ${BASH_REMATCH[1]} "${BASH_REMATCH[2]}";
    elif [[ $arg =~ ^-- ]]; then # --???
        options+=("$qarg");
        push_opt $arg "";
    elif [[ $arg =~ ^-[efmABCDd]$ ]]; then # -curr next
        unresolved_arg=$arg;
    elif [[ $arg =~ ^-[^-] ]]; then # -???
        options+=("$qarg");
        i=1;
        while [[ $i -lt ${#arg} ]]; do
            push_opt -${arg:(i++):1} "";
        done;
    elif [[ ! -v opt_hash["-e"] ]]; then # PATTERN
        options+=("$qarg");
        push_opt "-e" "$qarg";
    else # FILE
        files+=("$qarg");
    fi
done

# echo files="${files[@]}" >> ~/tmp/lvgrep.log
# echo options="${options[@]}" >> ~/tmp/lvgrep.log
# for x in "${!opt_hash[@]}"; do printf "%s = %s\n" "$x" "${opt_hash[$x]}" >> ~/tmp/lvgrep.log; done

# -h or -H
if [[ -v opt_hash["-h"] || -v opt_hash["-H"] ]]; then
    :
elif [ ${#files[@]} -lt 2 ]; then
    options+=("--no-filename");
else
    options+=("--with-filename");
fi

# execute each file
found=false
for file in "${files[@]}"; do
    cmd="lv -a -Os \"${file}\" | grep --label=\"${file}\" ${options[@]@Q}"
    # echo "$cmd" >> ~/tmp/lvgrep.log
    if bash -c "$cmd"; then
        found=true
    fi
done

# return exit status code
if [ "$found" = true ]; then
    exit 0;
else
    exit 1;
fi;

#!/bin/bash
export LANG=ja_JP.CP932

# parse command line
files=()
pattern=""
options=()
for arg in "$@"; do
    # \ -> \\
    qarg="${arg//\\/\\\\}"
    # " -> \"
    qarg="${qarg//\"/\\\"}"
    if [[ ${arg} = -* ]]; then
        options+=(${qarg});
    elif [[ -z "${pattern// }" ]]; then
        pattern=${qarg};
    else
        files+=(${qarg});
    fi
done
#echo pattern=${pattern}
#echo files="${files[@]}"
#echo options="${options[@]}"

# -h or -H
if echo " ${options[@]} " | grep -e " \\(--no-filename\\|--with-filename\\|-[^ -]*[hH][^ -]*\\) "; then
    :
elif [ ${#files[@]} -lt 2 ]; then
    options+=("--no-filename");
else
    options+=("--with-filename");
fi

# execute each file
found=false
for file in "${files[@]}"; do
    c="lv -Os \"${file}\" | grep --label=\"${file}\" ${options[@]} \"${pattern}\""
    #echo "$c"
    if bash -c "$c"; then
        found=true
    fi
done

# return exit status code
if [ "$found" = true ]; then
    exit 0;
else
    exit 1;
fi;