#!/bin/sh

export LANG=C
export LC_CTYPE=C
export LC_ALL=C
export PATH=${PATH}:`pwd`/bin/

unset FIND_E
case `uname -s` in
    *BSD|Darwin) FIND_E="-E "
esac

main() {
    [ -f /usr/local/bin/el ] && EL=/usr/local/bin/el
    [ -f `dirname $0`/../bin/el ] && EL=`dirname $0`/../bin/el

    if [ -z "${EL}" ]; then
      echo "el not found. Get it at 'git clone git://erdgeist.org/el'"
      exit 1
    fi

    if [ $# -ne 1 ]; then
      echo "Syntax: $0 [phonebookdirectory]"
      exit 1
    fi

    # Compile all the binaries
    make all

    printf "Cleaning up old working directory ... "
    rm -rf work/`basename "${1#white_}"`
    printf "done.\n"
    mkdir -p work/`basename "${1#white_}"`
    cd work/`basename "${1#white_}"` || exit 1

    if [ -f "$1/phonebook.db" ]; then
        handle_format_version_4 "${1}"
    elif [ -f "${1}"/[Dd][Aa][Tt]/[Tt][Ee][Ii][Ll][Nn].[Dd][Aa][Tt] ]; then
        handle_format_version_3 "${1}"
    elif [ -n "`find "${1}" -iname atb?dd00 -ls -quit`" ]; then
        handle_format_version_2 "${1}"
    elif [ -n "`find "${1}" -name dpr00000.005 -ls -quit`" ]; then
        handle_format_version_1 "${1}"
    else
        echo "Not a recognized Telefonbuch folder"
    fi
    cd ../..
}

do_decompress_version_3() {
    printf "Extracting $2 chunks ... "
    mkdir LHA && cd LHA
    extract_version_3 "${1}"
    cd ..
    printf "done.\n"

    printf "Decompressing $2 chunks ... "
    numfiles=`find LHA | wc -l`
    reported=0; processed=0
    for archive in LHA/*.lha; do
        lha x ${archive} > /dev/null
        [ 1 -eq $(( ( ( (processed+=1) * 20 ) / numfiles ) > reported )) ] && printf "%d%% " $(( (reported+=1) * 5 ))
    done
    rm -r LHA
    [ $reported -lt 10 ] && printf "100% "
    printf "done.\n"
}

do_processfile_version_3() {
    working_on=`basename ${1}`
    mkdir "${working_on}" && cd "${working_on}"
    do_decompress_version_3 "${1}" "${2}"
    cd ..

    printf "Combining $2 into single file ... "
    if [ "${4}" = "convert_zeros" ]; then
        cat "${working_on}"/* | tr '\n\0' '\t\n' > $3
    else
        cat "${working_on}"/* > $3
    fi
    printf "done.\n"

    rm -rf "${working_on}"
}

size() {
case `uname -s` in
    *BSD|Darwin) stat -f %z `printf %0${filename_len}d "$1"`;;
    *) stat -c %s `printf %0${filename_len}d "$1"`;;
esac
}

get_dword() {
    # $1 file
    hexdump -n 4 -v -e '" " 1/4 "%u"' `printf %0${filename_len}d "${1}"`
}

handle_format_version_1() {
    echo "Working on $1. Detected 1992 Telefonbuch version."
    # Extract all dpr database files
    printf "Extracting dpr databases ... "
    find "$1" -name dpr\*.001 | extract_version_1
    printf "done.\n"

    # rename our extracted columns
    mv 01_unknown 01_Flags

    mv 02_unknown 02_Nachname
    mv 03_unknown 03_Vorname
    mv 05_unknown 06_Ortszusatz
    mv 06_unknown 10_Zustellamt_PLZOst
    mv 07_unknown 07_Strasse
    mv 08_unknown 08_Hausnummer
    mv 10_unknown 09_Verweise
    mv 11_unknown 12_Vorwahl
    mv 12_unknown 13_Rufnummer
    mv 13_unknown 11_Ort
    mv 14_unknown 10_Postleitzahl_West
    mv 15_unknown 12_Vorwahl_block

    printf "Splitting appartement to zusaetze ... "
    paste 07_Strasse 08_Hausnummer 09_unknown | sed -E $'s:^(.*)\;([0-9]+.*)\t(.*)\t.*$:\\1\t\\2\tWohnung \\3:;s:^(.*)tr(\t.*\t.*)$:\\1tr.\\2:' > tm_unknown
    cut -f 1 tm_unknown > 07_Strasse
    cut -f 2 tm_unknown > 08_Hausnummer
    printf "done.\n"

    printf "Normalizing zusaetze ... "
    cut -f 3 tm_unknown | sed -E -e 's:^, +:u. :' > 04_Namenszusatz
    sed -E -e 's:^, +:u. :' 04_unknown > 05_Adresszusatz
    paste 04_Namenszusatz 05_Adresszusatz | awk '{$1=$1};1' > 04_Zusaetze
    printf "done.\n"

    # For consistency, create files with empty lines
    tr -dC '\n' < 01_Flags > 14_Webadresse
    cp 14_Webadresse 15_Email
    sed $'s:.*:\t:' 01_Flags > 16_Koordinaten

    tidy_columns

    rm ??_unknown
}

handle_format_version_2() {
    echo "Working on $1. Detected pre 02/1996 Telefonbuch version."

    # Extract all CD's pkware compressed databases
    printf "Extracting 3 pkware databases ...\n"
    cd=1
    for database in `find "$1" -iname atb?dd00`; do
      dir=`dirname ${database}`
      base=`basename ${database}`
      printf "  %d/3 in %4s. Decompressing ..." ${cd} "$( basename ${dir} )"
      extract_version_2 "${database}" > ${base}.dump

      printf ", extracting ..."
      indexfile=$( find ${dir} -iname atb?di00 )
      split_version_2 "${base}.dump" "${indexfile}"

      printf ", cleaning up ... "
      rm "${base}.dump"
      printf "done.\n"
      cd=$((cd+1))
    done

    mv 01_unknown 01_Flags
    mv 16_unknown 02_Nachname
    mv 07_unknown 03_Vorname
    mv 12_unknown 06_Ortszusatz
    mv 08_unknown 07_Strasse
    mv 10_unknown 08_Hausnummer
    mv 13_unknown 09_Verweise
    mv 02_unknown 10_Postleitzahl
    mv 15_unknown 11_Ort
    mv 09_unknown 11_Ort_Gemeinde
    mv 05_unknown 12_Vorwahl
    mv 06_unknown 13_Rufnummer

    printf "Normalizing zusaetze ... "
    sed -E -e 's:^, +:u. :' 14_unknown > 04_Namenszusatz
    sed -E -e 's:^, +:u. :' 11_unknown > 05_Adresszusatz
    paste 04_Namenszusatz 05_Adresszusatz | awk '{$1=$1};1' > 04_Zusaetze
    printf "done.\n"

    # For consistency, create files with empty lines
    tr -dC '\n' < 01_Flags > 14_Webadresse
    cp 14_Webadresse 15_Email
    sed $'s:.*:\t:' 01_Flags > 16_Koordinaten

    tidy_columns

    rm ??_unknown
}

handle_format_version_3() {
    # glob
    teiln=`printf "%s" "$1"/[Dd][Aa][Tt]/[Tt][Ee][Ii][Ll][Nn].[Dd][Aa][Tt]`
    braid=`printf "%s" "$1"/[Dd][Aa][Tt]/[Bb][Rr][Aa][Ii][Dd].[Dd][Aa][Tt]`
    streets=`printf "%s" "$1"/[Dd][Aa][Tt]/[Ss][Tt][Rr][Aa][Ss][Ss][Ee][Nn].[Dd][Aa][Tt]`
    karto=`printf "%s" "$1"/[Dd][Aa][Tt]/[Kk][Aa][Rr][Tt][Oo].[Dd][Aa][Tt]`

    if [ -f "${braid}" ]; then
      echo "Working on $1. Detected pre-2004 Yellow Pages version."
      is_yp=true
    else
      echo "Working on $1. Detected pre-2004 Telefonbuch version."
      unset is_yp
    fi
    # Extract teiln.dat
    do_decompress_version_3 "${teiln}" "teiln.dat"

    # See how long each filename is
    export filename_len=$(( `ls | head -n 1 | wc -c` - 1 ))

    # Get total amount of files, for reporting progress
    number_of_files=`find ${FIND_E} . -maxdepth 1 -regex '^\./[0123456789]+' | wc -l`

    # from 2000F on file 0+3*n is table, so make it default
    table_file=0; vname_file=2

    # if supposed vname file is larger than table file,
    # we're having a pre-2000F layout, so switch accordingly
    if [ `size ${table_file}` -lt `size ${vname_file}` ]; then
        table_file=2; nname_file=0; vname_file=1
    else
        nname_file=1
    fi

    # Table file has a table header with identical count
    # to nname file's header. Verify this
    if [ `get_dword ${nname_file}` -ne `get_dword ${table_file}` ]; then
        echo "Unknown layout."
        exit
    fi

    # Now loop over all files and dump them
    printf "Splitting decompressed nname chunks into their columns ... "
    JOT "%0${filename_len}d" ${nname_file} $(( number_of_files - 1 )) 3 | split_version_3 1 1
#        set -- `hexdump -n 8 -v -e '" " 1/4 "%u"' ${file}`
#        tail -c +$(( $2 + 1 )) ${file}
#    done | tr '\n\0' '\t\n' > 01_02_Flags_Nachname
    if [ "${is_yp}" ]; then
        cut -c 1  < 01_unknown > 01_Flags
        cut -c 2-7 < 01_unknown > 09_Branchenindex
        cut -c 8- < 01_unknown > 02_Nachname
    else
        cut -c 1  < 01_unknown > 01_Flags
        cut -c 2- < 01_unknown > 02_Nachname
    fi
    printf "done.\n"

    printf "Splitting decompress vname chunks into their columns ... "
    JOT "%0${filename_len}d" ${vname_file} $(( number_of_files - 1 )) 3 | xargs -n 128 cat | tr '\n\0' '\t\n' | tr -d '\377' | awk '{$1=$1};1' > 03_Vorname
    printf "done.\n"

    printf "Splitting decompress table file chunks into their columns ... "
    JOT "%0${filename_len}d" ${table_file} $(( number_of_files - 1 )) 3 | split_version_3 4 0
#    for file in `jot -w %0${filename_len}d - ${table_file} $(( number_of_files - 1 )) 3`; do
#        # Offset into first table entry tells us how many
#        # fields are in table file
#        set -- `hexdump -n 64 -v -e '" " 1/4 "%u"' ${file}`
#        count=$1; table_entries=$(( $2 / 4 - 1 )); shift
#
#        # Now iterate over all entries in the table file
#        for idx in `jot ${table_entries}`; do
#            tail -c +$(( $1 + 1 )) ${file} | tr '\n\0' '\t\n' | head -n ${count} >> `printf %02d_unknown $(( idx + 3 ))`
#            shift
#        done
#    done
    printf "done.\n"

    # wipe all temporary extracted files
    printf "Cleaning up decompressed chunks ... "
    find ${FIND_E} . -maxdepth 1 -regex '^\./[0123456789]+' -delete
    printf "done.\n"

    # rename our columns extracted from the table file
    mv 06_unknown 06_Ortszusatz
    mv 08_unknown 08_Hausnummer
    mv 10_unknown 10_Postleitzahl
    mv 11_unknown 11_Ort
    mv 12_unknown 12_Vorwahl
    mv 13_unknown 13_Rufnummer
    if [ -f 14_unknown ]; then
      tr '\\' '/' < 14_unknown | iconv -f iso-8859-15 -t utf-8 > 15_Email
    else
      tr -dC '\n' < 01_Flags > 15_Email
    fi
    if [ -f 15_unknown ]; then
      tr '\\' '/' < 15_unknown | iconv -f iso-8859-15 -t utf-8 > 14_Webadresse
    else
      tr -dC '\n' < 01_Flags > 14_Webadresse
    fi

    printf "Normalizing flags ... "
    sed -i.bak -e s:^1$:00:g -e s:^3$:01:g -e s:^2$:02:g 01_Flags
    rm 01_Flags.bak
    printf "done.\n"

    printf "Normalizing zusaetze ... "
    sed -E -e 's:^, +:u. :' 04_unknown > 04_Namenszusatz
    sed -E -e 's:^, +:u. :' 05_unknown > 05_Adresszusatz
    paste 04_Namenszusatz 05_Adresszusatz | awk '{$1=$1};1' > 04_Zusaetze
    printf "done.\n"

    printf "Normalizing verweise ... "
    sed -E -e 's:^\|::g;s:\|$::g;s:\|:, :g' 09_unknown | awk '{$1=$1};1' > 09_Verweise
    printf "done.\n"

    # At least 2002_Q3 and 2003_Q1 are known to sport | -separated vname and nname fields
    # those fields are redundant, as they are being made explicit in 09_-column for these entries
    if grep -q '|' 03_Vorname; then

      printf "Treating vname fields with pipe separator ... (adds 3 minutes) ... "
      # Identify entries with | in nname and move content of 09_Verweise to 04_Zusaetze
      paste 03_Vorname 04_Zusaetze 09_Verweise | sed -E $'s:^([^|]*)\|.*\t(.*)\t(.*):\\1\t\\2 \\3\t:;' > 03_04_09_Temp
      cut -f 1 03_04_09_Temp | awk '{$1=$1};1' > 03_Vorname
      cut -f 2 03_04_09_Temp | awk '{$1=$1};1' > 04_Zusaetze
      cut -f 3 03_04_09_Temp | awk '{$1=$1};1' > 09_Verweise
      rm 03_04_09_Temp

      # Delete redundant nachnamen values
      cut -d '|' -f 1 02_Nachname > 02_Nachname.new
      mv 02_Nachname.new 02_Nachname

      printf "done.\n"
    fi

    # If street names come in an extra file, extract
    # street names first
    if [ -f "${streets}" ]; then
        printf "Extracting street name indexes ... "
        do_processfile_version_3 "${streets}" "street name" 99_Strassenname convert_zeros
        printf "done.\n"
    fi

    # extract street names if 07_unknown contains street indexes
    # instead of street names
    if [ -f 99_Strassenname ]; then
        mv 07_unknown 07_Strassenindex

        # fix up known broken Strassennamen file
        [ `stat -f %z ${streets}` -eq 1642716 ] && printf '9. Str.\n91. Str.\n91er-Str.\n' >> 99_Strassenname

        printf "Looking up street names from indexes ... "
        cut -d ';' -f 1 07_Strassenindex | ${EL} -0x 99_Strassenname > 07_Strasse
        printf "done.\n"
    else
        mv 07_unknown 07_Strasse
    fi

    if [ -f "${karto}" ]; then
      do_processfile_version_3 "${karto}" "geo coordinates" 90_Geokoordinaten_hnr_raw

      printf "Looking up geo coordinates for each phonebook entry ... "
      tr '\0;' '\n\t' < 90_Geokoordinaten_hnr_raw | cut -f "1,2,3,4,6,7" | tr '\n' '\0' > 90_Geokoordinaten_hnr
      rm 90_Geokoordinaten_hnr_raw
      paste 10_Postleitzahl 11_Ort 07_Strasse 08_Hausnummer | map_coords 90_Geokoordinaten_hnr | convert_coords > 16_Koordinaten
      printf "done.\n"
    else
      sed $'s:.*:\t:' 01_Flags > 16_Koordinaten
    fi

    if [ -f "${braid}" ]; then
      do_processfile_version_3 "${braid}" "branchen name index" 97_Branchenname convert_zeros

      printf "Looking up branch names from codes ... "
      map_branches_v3 97_Branchenname < 09_Branchenindex > 09_Branchen
      printf "done.\n"
    fi

    tidy_columns

    rm ??_unknown
}

fix_broken_v4_file() {
    name=$1
    offset=$2
    nullbytes=$3
    gap=$4

    head -c $(( offset - 1 )) file_${name} > file_${name}_
    [ "${nullbytes}" -gt 0 ] && printf '\x00' >> file_${name}_
    tail -c +$(( offset + gap )) file_${name} >> file_${name}_
    mv file_${name}_ file_${name}
}

handle_format_version_4() {
    if [ -f "$1/branchcodes.tl" ]; then
      is_yp=true
      echo "Working on $1. Detected post-2003 Yellow Pages version."
    else
      unset is_yp
      echo "Working on $1. Detected post-2003 Telefonbuch version."
    fi

    printf "Extracting street names ... "
    extract_version_4 "$1/streets.tl"

    cat file_* | tr '\n\0' '\t\n' > 99_Strassenname
    rm file_*
    printf "done.\n"

    printf "Extracting phonebook.db ... "
    extract_version_4 "$1/phonebook.db"

    case $1 in
    *2023_Q1*)
        # Fixup broken file in 2023_Q1
        fix_broken_v4_file 17F0A 0x01BB 1 93
        ;;
    *2023_Q3*)
        # Fixup broken file in 2023_Q3
        fix_broken_v4_file 15DB2 0x3D05 0 373
        fix_broken_v4_file 15DBD 0x8CA8 0 391
        fix_broken_v4_file 15DD3 0x72B7 0 120
        fix_broken_v4_file 15E2B 0x0549 0 2051
        fix_broken_v4_file 15EE6 0x0569 1 144
        fix_broken_v4_file 15F28 0x2EF8 0 103
        fix_broken_v4_file 15F3E 0x3C1C 0 164
        fix_broken_v4_file 16348 0x0942 0 221
        fix_broken_v4_file 16419 0x0CF8 0 140
        fix_broken_v4_file 16471 0x0681 0 106
        ;;
    esac

    rows=`find . -name file_\* | wc -l`
    printf "done.\n"

    printf "Splitting decompressed chunks into their columns (11 total) ... 1, "
    JOT "file_%05X" 0 $(( rows - 1 )) 11 | xargs -n 128 cat | xxd -ps -c1 > column_0

    for col in 1 2 3 4 5 6 7 8 9 10; do
      printf "%d, " $(( col + 1 ))
      JOT "file_%05X" ${col} $(( rows - 1 )) 11 | xargs -n 128 cat | tr '\n\0' '\t\n' > column_${col}
    done
    printf "done.\n"

    printf "Cleaning up decompressed chunks ... "
    find . -name file_\* -delete
    printf "done.\n"

    # the 'did not object to inverse search' flag is insane and needs to be reversed
    if grep -q ^40 column_0; then
      printf "Cleanung up inverted reverse search flags ... "
      awk '{ a=substr($0,1,1); printf "%x%x\n",index("5670123cdef89ab4",a)%16 ,substr($0,2,1) }' < column_0 > 01_Flags
      printf "done\n"
    else
      mv column_0 01_Flags
    fi

    mv column_1 02_Nachname
    mv column_2 03_Vorname
    mv column_3 04_05_Namenszusatz_Addresszusatz
    mv column_5 07_08_Strassenindex_Hausnummer
    mv column_6 12_Vorwahl
    mv column_7 10_Postleitzahl
    mv column_8 11_Ort
    mv column_9 13_Rufnummer
    mv column_10 14_15_Email_Webadresse

    printf "Looking up street names from indexes ... "
    cut -f 1 07_08_Strassenindex_Hausnummer | ${EL} -0 99_Strassenname > 07_Strasse
    printf "done.\n"

    printf "Splitting house numbers ... "
    sed -E $'s:$:\t:' < 07_08_Strassenindex_Hausnummer | cut -f 2 > 08_Hausnummer
    printf "done.\n"

    printf "Normalizing zusaetze ... "
    sed -E -e $'s:(^|\t),: u. :g' 04_05_Namenszusatz_Addresszusatz | awk '{$1=$1};1' > 04_Zusaetze
    printf "done.\n"

    printf "Normalizing verweise ... "
    sed -E -e $'s:^\|+::g;s:\|+$::g;s:\|:, :g' column_4 | awk '{$1=$1};1' > 09_Verweise
    printf "done.\n"

    printf "Splitting webaddress ... "
    cut -d $'\t' -f 1 14_15_Email_Webadresse | tr '\\' '/' | iconv -f iso-8859-15 -t utf-8 > 14_Webadresse
    printf "done.\n"

    printf "Splitting email ... "
    sed $'s:$:\t:' < 14_15_Email_Webadresse | cut -sd $'\t' -f 2 | tr '\\' '/' | iconv -f iso-8859-15 -t utf-8 > 15_Email
    printf "done.\n"

    if [ -f "$1/zip-streets-hn-geo.tl" ]; then
      printf "Extracting geo coordinates (precision: house number) ... "
      extract_version_4 "$1/zip-streets-hn-geo.tl"
      cat file_* > 90_Geokoordinaten_hnr
      printf "done.\n"
      printf "Looking up geo coordinates for each phonebook entry ... "
      paste 10_Postleitzahl 07_Strasse 08_Hausnummer | map_coords 90_Geokoordinaten_hnr | convert_coords > 16_Koordinaten
      printf "done.\n"
    elif [ -f "$1/zip-streets-geo.tl" ]; then
      printf "Extracting geo coordinates (precision: street) ... "
      extract_version_4 "$1/zip-streets-geo.tl"
      cat file_* > 91_Geokoordinaten_str
      printf "done.\n"
      printf "Looking up geo coordinates for each phonebook entry ... "
      paste 10_Postleitzahl 07_Strasse | map_coords 91_Geokoordinaten_str | convert_coords > 16_Koordinaten
      printf "done.\n"
    else
      sed $'s:.*:\t:' 01_Flags > 16_Koordinaten
    fi
    rm file_*

    if [ "${is_yp}" ]; then
      printf "Extracting branch names ... "
      extract_version_4 "$1/branchcodes.tl"
      cat file_* | tr '\n\0' '\t\n' > 97_Branchenname
      rm file_*
      printf "done.\n"

      printf "Looking up branch names from codes ... "
      map_branches_v4 97_Branchenname < 09_Verweise > 09_Branchen
      printf "done.\n"
    fi

    tidy_columns
    rm column_*
}

tidy_columns () {

  printf "Removing backslashes from Nachnamen ... "
  sed -E -e 's:\\::g' 02_Nachname | awk '{$1=$1};1' | iconv -f iso-8859-15 -t utf-8 > 02_Nachname.new
  mv 02_Nachname.new 02_Nachname
  printf "done.\n"

  printf "Unicoding Vornamen ... "
  iconv -f iso-8859-15 -t utf-8 03_Vorname > 03_Vorname.new
  mv 03_Vorname.new 03_Vorname
  printf "done.\n"

  printf "Unicoding Zusaetze ... "
  iconv -f iso-8859-15 -t utf-8 04_Zusaetze > 04_Zusaetze.new
  mv 04_Zusaetze.new 04_Zusaetze
  printf "done.\n"

  printf "Tidying up streetnames ... "
  # Replace any dots at end of line by a single one
  # finish any str abbreviation without a period with a period
  sed -E 's/\.+/./g;s/(S|s)tr( |:)?$/\1tr./;s/(.*)-(.*) -/\1-\2-Str./;s/ -$/ Str./;s/-$/str./;s/^(.*-.*) Str\.?$/\1-Str./' 07_Strasse | iconv -f iso-8859-15 -t utf-8 > 07_Strasse.new
  mv 07_Strasse.new 07_Strasse
  printf "done.\n"

  printf "Normalizing house numbers ... "
  sed -E -e 's:^([[:digit:]]+) *([A-Za-z])$:\1 \2:' -e 's: a$: A:;s: b$: B:;s: c$: C:;s: d$: D:;s: e$: E:;s: f$: F:;s: g$: G:;s: h$: H:;s: i$: I:;s: j$: J:;s: k$: K:;s: l$: L:;s: m$: M:;s: n$: N:;s: o$: O:;' 08_Hausnummer | iconv -f iso-8859-15 -t utf-8 > 08_Hausnummer.new
  mv 08_Hausnummer.new 08_Hausnummer
  printf "done.\n"

  printf "Unicoding Verweise ... "
  iconv -f iso-8859-15 -t utf-8 09_Verweise > 09_Verweise.new
  mv 09_Verweise.new 09_Verweise
  printf "done.\n"

  printf "Unicoding Postleitzahl ...  "
  iconv -f iso-8859-15 -t utf-8 10_Postleitzahl > 10_Postleitzahl.new
  mv 10_Postleitzahl.new 10_Postleitzahl
  printf "done.\n"

  printf "Removing trailing * from Ort ... "
  sed -E -e 's:\*$::' 11_Ort | iconv -f iso-8859-15 -t utf-8 > 11_Ort.new
  mv 11_Ort.new 11_Ort
  printf "done.\n"

  printf "Unicoding Vorwahl ...  "
  iconv -f iso-8859-15 -t utf-8 12_Vorwahl > 12_Vorwahl.new
  mv 12_Vorwahl.new 12_Vorwahl
  printf "done.\n"

  printf "Unicoding Rufnummer ...  "
  iconv -f iso-8859-15 -t utf-8 13_Rufnummer > 13_Rufnummer.new
  mv 13_Rufnummer.new 13_Rufnummer
  printf "done.\n"

}

# JOT <format> <begin> <end> <step>
JOT () {
 case `uname -s` in
    *BSD|Darwin)
      jot -w "$1" - "$2" "$3" "$4"
      ;;
    *)
      for x in `seq "$2" "$4" "$3"`; do printf "$1\n" "$x"; done
      ;;
  esac
}

# After function definitions, main() can use them
main "$@"