#!/bin/sh
# Filter one or more input files to reset the checksum field in a line
# that looks like:
#
# %%      checksum        = "12345 327    1242   10167",
#
# where the first number is a CRC-16 checksum, and the remainder
# are the same as produced by wc (lines, words, characters).
#
# All changes are left in a subdirectory, ./tmp.
#
# [10-Sep-1991] -- use new checksum utility
# %%      checksum        = "327    1242   10167",
# [16-Nov-1990] -- original version
if [ ! -d tmp ] 
then
	mkdir tmp
fi
for f in $*
do
	expand $f | sed -e 's/[ 	]*$//' >$f.~0~
#	checksum="`wc <$f.~0~ | sed -e s'/^ *//'"
#	sed -e s"/      checksum        = \".*/      checksum        = \"$checksum\",/" <$f.~0~ >tmp/$f
	checksum $f.~0~ tmp/$f
	if cmp $f.~0~ tmp/$f 	# don't save identical files
	then
		rm -f tmp/$f
	else
		echo ==================== $f ====================
		diff $f tmp/$f
	fi 
	rm -f $f.~0~
done