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#! /bin/sh

t=__wt.$$
trap 'rm -f $t' 0 1 2 3 13 15

# Insulate against locale-specific sort order and IFS from the user's env
LC_ALL=C
export LC_ALL
IFS=' ''	''
'
export IFS

build() {
	# Build the standard typedefs.
	f=../src/include/wt_internal.h
	(sed -e '/Forward type declarations .*: BEGIN/{' \
	    -e 'n' \
	    -e 'q' \
	    -e '}' < $f

	l=`ls ../src/include/*.[hi] ../src/include/*.in |
	    sed -e '/wiredtiger.*/d' -e '/queue.h/d'`
	egrep -h \
	    '^[	 ]*(((struct|union)[	 ].*__wt_.*{)|WT_PACKED_STRUCT_BEGIN)' \
	    $l |
	    sed -e 's/WT_PACKED_STRUCT_BEGIN(\(.*\))/struct \1 {/' \
	        -e 's/WT_COMPILER_TYPE_ALIGN(.*)[ ]*//' \
	        -e 's/^[	 ]*//' -e 's/[	 ]*{.*//' | sort -u | \
	while read t n; do
		upper=`echo $n | sed -e 's/^__//' | tr [a-z] [A-Z]`
		echo "$t $n;"
		echo "    typedef $t $n $upper;"
	done

	echo '/*'
	sed -e '/Forward type declarations .*: END/,${' \
	    -e 'p' \
	    -e '}' \
	    -e 'd' < $f) > $t
	cmp $t $f > /dev/null 2>&1 ||
	    (echo "Building $f" && rm -f $f && cp $t $f)
}

check() {
	# Complain about unused #typedefs.
	# List of files to search.
	l=`sed -e '/^[a-z]/!d' -e 's/[	 ].*$//' -e 's,^,../,' filelist`
	l="$l `echo ../src/utilities/*.c`"

	(
	# Get the list of typedefs
	search=`cat ../src/include/*.h ../src/include/*.in |
	    sed -e 's/^struct.*typedef.* \(.*\);$/\1/p' \
	        -e 's/^union.*typedef.* \(.*\);$/\1/p' \
	        -e d |
	    sort -u`
	echo "$search"
	fgrep -who "$search" $l
	) | sort | uniq -u > $t

	test -s $t && cat $t
}

usage()
{
	echo 'usage: s_typedef [-bc]' >&2
	exit 1
}
test "$#" -eq 1 || usage
while :
	do case "$1" in
	-b)				# -b builds the typedefs
		build
		shift;;
	-c)				# -c checks the typedefs
		check
		shift;;
	*)
		test "$#" -eq 0 || usage
		break;;
	esac
done

exit 0