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