From 79c5fb3e3256017f0033de8cc2fdefcc6148c9f1 Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Mon, 22 Apr 2019 01:54:51 -0400
Subject: src/archplat.sh: Sync with opkbuild

4c912ce _ob_match_plat(): Move closer to usage
787a355 _ob_match_plat(): Remove loop
ee0c303 _ob_match_arch(): Remove loop
85d78aa ob_match_*(): Make private
1e8d84e ob_match_*(): Drop checks for "all" match arch/plat
bb7dd8e ob_match_plat(): Use clearer variable names
e6b04d9 Protect [ commands from strings beginning with "-"
9196698 ob_match_arch(): Use clearer variable names
5e69b33 ob_match_arch(): Replace generated ERE with native SCL
---
diff --git a/src/archplat.sh b/src/archplat.sh
index b8324a0..6621ee7 100644
--- a/src/archplat.sh
+++ b/src/archplat.sh
@@ -1,6 +1,6 @@
 # Functions for matching architectures and platforms
 #
-# Copyright (C) 2012  Patrick "P. J." McDermott
+# Copyright (C) 2012, 2019  Patrick McDermott
 #
 # This file is part of the ProteanOS Development Kit.
 #
@@ -18,92 +18,70 @@
 # along with the ProteanOS Development Kit.  If not, see
 # <http://www.gnu.org/licenses/>.
 
-match_arch()
+_match_arch()
 {
-	local arch="${1}"
-	local arch_field="${2}"
-	local a=
-	local a_ere=
+	local match_arch="${1}"
+	local field_arch="${2}"
+	shift 2
+	local match_arch_rest=
+	local field_arch_rest=
+	local match_arch_part=
+	local field_arch_part=
 
-	for a in ${arch_field}; do
-
-		# "all" == "all"
-		if [ "${arch}" = 'all' ]; then
-			if [ "${a}" = 'all' ]; then
-				return 0
-			else
-				continue
-			fi
-		fi
-
-		# "foo-bar-baz" == "any"
-		if [ "${a}" = 'any' ]; then
-			return 0
-		fi
-
-		# Generate an ERE to match hyphenated architectures.
-		a_ere="$(printf '%s\n' "${a}" | sed \
-			's/^any-/[^-]+-/;s/-any-/-[^-]+-/g;s/-any$/-[^-]+/g')"
-
-		# "foo-bar-baz" == "foo-any-any"
-		if echo "${arch}" | grep -E "${a_ere}" >/dev/null 2>&1; then
-			return 0
-		fi
-
-	done
-
-	# Nothing matched.
-	return 1
-}
-
-match_plat()
-{
-	local plat="${1}"
-	local plat_field="${2}"
-	local p=
+	# "foo-bar-baz" == "any"
+	if [ x"${field_arch}" = x'any' ]; then
+		return 0
+	fi
 
-	for p in ${plat_field}; do
-		if [ "x${plat}" = 'xall' ]; then
-			if [ "x${p}" = 'xall' ]; then
-				return 0
-			else
-				continue
-			fi
-		fi
-		if [ "x${p}" = 'xany' ]; then
-			return 0
-		fi
-		if [ "x${p}" = "x${plat}" ]; then
-			return 0
-		fi
+	# "foo-bar-baz" == "foo-any-any"
+	match_arch_rest="${match_arch}"
+	field_arch_rest="${field_arch}"
+	while [ -n "${match_arch_rest}" ] && [ -n "${field_arch_rest}" ]; do
+		IFS='-' read match_arch_part match_arch_rest <<-EOF
+			${match_arch_rest}
+			EOF
+		IFS='-' read field_arch_part field_arch_rest <<-EOF
+			${field_arch_rest}
+			EOF
+		case "${field_arch_part}" in
+			"${match_arch_part}" | 'any') ;;
+			*) return 1;;  # Failed match
+		esac
 	done
 
-	return 1
+	return 0
 }
 
 arch_is_concerned()
 {
 	local host_arch="${1}"
 	local arches="${2}"
+	shift 2
 	local arch=
 	local not_arch=
 	local seen_arch=
 
-	if [ "x${arches}" = 'x' ]; then
+	if [ x"${arches}" = x'' ]; then
 		return 0
+	elif [ x"${host_arch}" = x'all' ]; then
+		if [ x"${arches}" = x'all' ]; then
+			return 0
+		else
+			return 1
+		fi
 	else
 		seen_arch=1
 		for arch in ${arches}; do
 			not_arch="${arch#!}"
-			if [ "x${not_arch}" != "x${arch}" ]; then
-				if match_arch "${host_arch}" "${not_arch}"
+			if [ x"${not_arch}" != x"${arch}" ]; then
+				if _match_arch "${host_arch}" "${not_arch}"
 				then
 					seen_arch=1
 					break
-				elif [ "x${host_arch}" != 'xall' ]; then
+				else
 					seen_arch=0
 				fi
-			elif match_arch "${host_arch}" "${arch}"; then
+			elif _match_arch "${host_arch}" "${arch}"; then
 				seen_arch=0
 				break
 			fi
@@ -112,29 +90,52 @@ arch_is_concerned()
 	fi
 }
 
+_match_plat()
+{
+	local match_plat="${1}"
+	local field_plat="${2}"
+	shift 2
+
+	if [ x"${field_plat}" = x'any' ]; then
+		return 0
+	fi
+	if [ x"${field_plat}" = x"${match_plat}" ]; then
+		return 0
+	fi
+
+	return 1
+}
+
 plat_is_concerned()
 {
 	local host_plat="${1}"
 	local plats="${2}"
+	shift 2
 	local plat=
 	local not_plat=
 	local seen_plat=
 
-	if [ "x${plats}" = 'x' ]; then
+	if [ x"${plats}" = x'' ]; then
 		return 0
+	elif [ x"${host_plat}" = x'all' ]; then
+		if [ x"${plats}" = x'all' ]; then
+			return 0
+		else
+			return 1
+		fi
 	else
 		seen_plat=1
 		for plat in ${plats}; do
 			not_plat="${plat#!}"
-			if [ "x${not_plat}" != "x${plat}" ]; then
-				if match_plat "${host_plat}" "${not_plat}"
+			if [ x"${not_plat}" != x"${plat}" ]; then
+				if _match_plat "${host_plat}" "${not_plat}"
 				then
 					seen_plat=1
 					break
-				elif [ "x${host_plat}" != 'xall' ]; then
+				else
 					seen_plat=0
 				fi
-			elif match_plat "${host_plat}" "${plat}"; then
+			elif _match_plat "${host_plat}" "${plat}"; then
 				seen_plat=0
 				break
 			fi
--
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