reverse-hal.sh

	#!/bin/bash
	

	if [ ! -d "$1" -o ! -f "$1/manifest.xml" ];then
		echo "Usage: $0 <vendor-folder>"
		exit 1
	fi
	

	rm -f broken
	for HAL in $(xmlstarlet sel -t -m '//hal/name' -v . -n "$1/manifest.xml" |grep -vE '^android\.hardware\.');do
		interface="$(
			xmlstarlet sel  \
				-t -m '//hal[./name/text()="'"$HAL"'"]' \
				-v './interface/name' "$1/manifest.xml")"
		for version in $(xmlstarlet sel \
				-t -m '//hal[./name/text()="'"$HAL"'"]' \
				-v './version' -n "$1/manifest.xml");do
	

			class="$(echo "$interface" |sed -E 's/^I/BpHw/g')"
			namespace="$(echo $HAL |sed -E 's/\./::/g')"
			namespace2="$(echo ${namespace}::V"$(echo $version |sed -e 's/\./_/g')")"
			prefix="$namespace2::$class"
	

			lib="$(echo "$1"/lib64/${HAL}@${version}.so)"
			if [ ! -f "$lib" ];then
				lib="$(echo "$1"/lib64/${HAL}@${version}_vendor.so)"
			fi
			if [ ! -f "$lib" -a -n "$2" ];then
				lib="$(echo "$2"/lib64/${HAL}@${version}.so)"
			fi
			if [ ! -f "$lib" -a -n "$2" ];then
				lib="$(echo "$2"/system/lib64/${HAL}@${version}.so)"
			fi
			if [ ! -f "$lib" ];then
				echo "Failed to find ${HAL}@${version}.so" >> broken
				continue
			fi
			nm -DC $lib |grep -F "T $prefix" | \
				sed -E "s/^.*$prefix:://g" | \
				grep -vE -e '\bping\b' -e '\binterfaceChain\b' -e '\binterfaceDescriptor\b' \
					-e '\bnotifySyspropsChanged\b' -e '\blinkToDeath\b' -e '\bunlinkToDeath\b' \
					-e '\bsetHALInstrumentation\b' \
					-e '\bgetDebugInfo\b' -e '\bdebug\b' \
					-e '\bgetHashChain\b' -e "^$class\(android::sp<android::hardware::IBinder> const&\)" | \
				sed -E 's/(, )?std::__1::function<void \((.*)\)>\).*/\) generates \(\2\)/g' | \
				sed -E 's/android::hardware::hidl_string const\&/string/g' | \
				sed -E 's/android::hardware::hidl_vec<([^>]*)> const\&/vec<\1>/g' | \
				grep -vE '^_hidl_' \
				> $HAL@$version.hal
		done
	done