#!/bin/sh
#
# bigcal - make a 78-column version of the output of the "cal" command
#
# Pass it the same arguments you'd pass to cal, if any.  If you try a
# full-year calendar, you probably won't get anything useful.
#
# Jef Poskanzer <jef@mail.acme.com>

# Cal sends errors to stdout.  Correct this.
if [ `cal -h "$@" | wc -l` = 1 ] ; then
    cal -h "$@" >&2
    exit 1
fi

cal -h "$@" | head -n 1 | sed 's/^ *//' | awk '{printf "%s%s\n", substr("                                       ", length/2), $0}'

cat << EOF
+----------+----------+----------+----------+----------+----------+----------+
|  Sunday  |  Monday  | Tuesday  |Wednesday | Thursday |  Friday  | Saturday |
+----------+----------+----------+----------+----------+----------+----------+
EOF

cal -h "$@" | tail -n +3 | egrep -v '^ *$' | sed -e 's/  *$//' -e '/^$/d' -e 's/ /x/g' -e 's/^/x/' |
( while read line ; do
    echo "$line" | sed -e 's/xxx/           /g' -e 's/x[0-9x][0-9]/|      & /g' -e 's/$/|/'
    echo "$line" | sed -e 's/xxx/           /g' -e 's/x[0-9x][0-9]/|          /g' -e 's/$/|/'
    echo "$line" | sed -e 's/xxx/           /g' -e 's/x[0-9x][0-9]/|          /g' -e 's/$/|/'
    echo "$line" | sed -e 's/.../+----------/g' -e 's/$/+/'
done ) |
sed 's/x/ /g'