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|
#!/usr/bin/env bash
#
# usage: inclosure [ -I dir ] ... [ -G header-name ] ... header-name ...
#
# Locates each standard header and argument header-name in the
# specified "-I" include path (default is /usr/include) and parses
# any header names out of its #include directives. These names are
# treated recursively to identify a _transitive_closure_ of standard
# header names, which is sorted and sent to standard output. Headers
# not specified with -G, and included somewhere but not located are
# reported.
#
# Each header reported by this program must be "shadowed" by a
# file of the same name in a C++ header. See
# http://www.cantrip.org/cheaders.html
#
# BUGS:
# - Cannot cope with header file names that contain spaces
# - Ignores comment-block delimiters
# - Ignores sub-includes under #include_next headers.
OLDH=/tmp/old$$
echo "this-compensates-for-a-stupid-bug-in-GNU-fgrep." >$OLDH
HDRS=/tmp/hdrs$$
>$HDRS
NEW=/tmp/new$$
>$NEW
IGNORES=/tmp/ignores$$
echo "this-compensates-for-a-stupid-bug-in-GNU-fgrep.">$IGNORES
trap "rm -f $NEW $HDRS $OLDH $IGNORES" 0
# process arguments
unset INCPATH
while [ $# != 0 -a "$1" != "${1#-}" ]; do
FLAG="${1%%${1##-?}}"
case "$FLAG" in -I|-G)
ARG="${1##${FLAG}}"
if [ "$ARG" = "" ]; then
if [ $# != 0 ]; then
shift;
ARG="$1"
else
echo "$0: $FLAG needs an argument."
exit
fi
fi ;;
esac
shift
case "$FLAG" in
-I) INCPATH="$INCPATH $ARG" ;;
-G) echo " $ARG " >>$IGNORES ;;
esac
done
INCPATH=${INCPATH-"/usr/include"}
# identify headers
STDHDRS="assert.h ctype.h errno.h float.h limits.h \
locale.h math.h setjmp.h signal.h stdarg.h stddef.h \
stdio.h stdlib.h string.h time.h wchar.h wctype.h "
OTHERS="$*"
for file in $STDHDRS $OTHERS; do
echo "$file"
done >$HDRS
until cmp -s $OLDH $HDRS; do # (until no new headers found)
fgrep -v -f $OLDH $HDRS \
| while read file; do
found=no
for dir in $INCPATH; do
name="$dir/$file"
if [ -f "$name" ]; then
cat "$name"
found=yes
break;
fi
done
if [ "$found" = no ]; then # && echo " $file " | fgrep -v -q -f $IGNORES
echo "$0: warning: header $file not found in include path." $1>&2
fi
done \
| sed -n -e \
'/^[ ]*#[ ]*include[ ]*<[^>]*>/s/^[^<]*<\([^>]*\)>.*/\1/p' \
| while read file; do
drop=no
for ignore in `cat $IGNORES`; do
if [ "$ignore" = "$file" ]; then drop=yes; fi
done
case "$file" in /*) drop=yes;; esac # no absolute paths
case $drop in no) echo "$file";; esac
done >$NEW
mv $HDRS $OLDH
cat $OLDH $NEW | sort -u -o $HDRS
done
cat $HDRS
|
