#! /bin/sh
# $Id: headers.in,v 1.2 2022/10/18 21:32:59 tom Exp $
# vi:ts=4 sw=4
# ---------------------------------------------------------------------------
# Copyright 2001-2012,2022 Thomas E. Dickey
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, distribute
# with modifications, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to the
# following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
#
# Except as contained in this notice, the name(s) of the above copyright
# holders shall not be used in advertising or otherwise to promote the sale,
# use or other dealings in this Software without prior written
# authorization.
# ---------------------------------------------------------------------------
#
# Adjust includes for header files that reside in a subdirectory of
# /usr/include, etc.
#
# Options:
#	-c CFG	specify an alternate name for config.h
#	-d DIR	target directory
#	-e FILE	extra editing commands, e.g., for manpage references
#	-h FILE install the given file in subdirectory DIR rather than parent
#	-i    	create/update the headers.sed script
#	-p PKG	specify the package name
#	-s DIR	source directory
#	-t TYPE renaming for manpage-sections
#	-x PRG	install-program (plus options, the whole value in quotes)
#
# Other parameters are assumed to be provided only for the install scenario.

SCRIPT=headers.sed
MYFILE=headers.tmp

OPT_C=config.h
OPT_D=
OPT_E=
OPT_H=
OPT_I=n
OPT_P=
OPT_S=
OPT_T=
OPT_X=install

while test $# != 0
do
	case $1 in
	-c)	# CFG	specify an alternate name for config.h
		shift
		OPT_C="$1"
		;;
	-d)	# DIR	target directory
		shift
		OPT_D="$1"
		;;
	-e)	# FILE	extra sed-commands
		shift
		OPT_E="$OPT_E -f $1"
		;;
	-h)	# FILE	special-case of header in subdirectory
		shift
		OPT_H="$1"
		;;
	-i)	# create the headers.sed script
		if test "$OPT_I" = n
		then
			rm -f $SCRIPT
		fi
		OPT_I=y

		if test -n "$OPT_D"
		then
			if test -n "$OPT_S" && test -d "$OPT_S"
			then
				LEAF=`basename "$OPT_D"`
				case $OPT_D in
				/*/include/$LEAF)
					END=`basename "$OPT_D"`
					for i in "$OPT_S"/*.h
					do
						NAME=`basename "$i"`
						if test -z "$OPT_H" || test "$OPT_H" != "$NAME"
						then
							echo "s%<$NAME>%<$END/$NAME>%g" >> $SCRIPT
						fi
					done
					;;
				*)
					echo "" >> $SCRIPT
					;;
				esac
				OPT_S=
				if test -f $SCRIPT ; then
					sort -u $SCRIPT >$MYFILE
					rm -f $SCRIPT
					mv $MYFILE $SCRIPT
				fi
			fi
		fi

		if test -n "$OPT_P"
		then
			for name in `
			@EGREP@ "#define[ 	][ 	]*[A-Z]" "$OPT_C" \
				| sed	-e 's/^#define[ 	][ 	]*//' \
					-e 's/[ 	].*//' \
				| @FGREP@ -v GCC_ \
				| sort -u \
				| @EGREP@ -v "^${OPT_P}_"`
			do
				echo "s%\\<$name\\>%${OPT_P}_$name%g" >>$SCRIPT
			done
			if test -f $SCRIPT ; then
				sort -u $SCRIPT >$MYFILE
				rm -f $SCRIPT
				mv $MYFILE $SCRIPT
			fi
			OPT_P=
		fi
		;;
	-p)	# PKG	specify the package name
		shift
		OPT_P="$1"
		;;
	-s)	# DIR	source directory
		shift
		OPT_S="$1"
		;;
	-t)	# rename suffix of target
		shift
		OPT_T="$1"
		;;
	-x)	# PRG	install-program (plus options, the whole value in quotes)
		shift
		OPT_X="$1"
		;;
	-*)
		usage
		;;
	*)
		FILE=$1

		SHOW=`basename "$FILE"`
		TMPSRC=${TMPDIR-/tmp}/${SHOW}$$

		echo "	... $SHOW"
		test -f "$OPT_S/$FILE" && FILE="$OPT_S/$FILE"

		if test -f "$FILE"
		then
			rm -f "$TMPSRC"
			sed -f "$SCRIPT" $OPT_E "$FILE" > "$TMPSRC"
			NAME=`basename "$FILE"`
			if test -n "$OPT_T" ; then
				NAME=`echo "$NAME" | sed -e 's/\.[^.]*$//'`.$OPT_T
			fi

			# Just in case someone gzip'd manpages,
			# remove the conflicting copy.
			test -f "$OPT_D/$NAME.gz" && rm -f "$OPT_D/$NAME.gz"

			eval "$OPT_X" "$TMPSRC" "$OPT_D/$NAME"
			rm -f "$TMPSRC"
		fi
		;;
	esac
	shift
done
