From 143be949563795c73e007f64606339c224da120c Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Sun, 29 Jan 2012 20:55:30 -0500
Subject: Write lib/architecture.

---
diff --git a/lib/Makefile.in b/lib/Makefile.in
index 107bc9b..526bf3a 100644
--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -27,7 +27,7 @@ LIBDIR = @libdir@
 
 .SUFFIXES:
 
-OBJS = controlfields
+OBJS = controlfields architecture
 
 .PHONY: all
 all: $(OBJS)
diff --git a/lib/architecture b/lib/architecture
new file mode 100644
index 0000000..b213b62
--- /dev/null
+++ b/lib/architecture
@@ -0,0 +1,69 @@
+#! /bin/sh
+#
+# opkhelper
+# lib/architecture
+# Functions for determining the target architecture.
+#
+# Copyright (C) 2012 Patrick "P. J." McDermott
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. @@LIBDIR@@/opkhelper/controlfields
+
+oh_is_buildable()
+{
+	_pkgarch=$(oh_get_field "${1}" Architecture)
+
+	if [ "${_pkgarch}" = all -o "${_pkgarch}" = any ]; then
+		return 0
+	fi
+
+	# XXX: Handle platforms.
+
+	# Tokenize the 4-tuple binary architecture.
+	echo "${_pkgarch}" | IFS=- read _pkgcpu _pkgvendor _pkgkernel _pkglibs
+
+	# Test each element of the tuple.
+	[ "${_pkgcpu}" != any -a "${_pkgcpu}" != "${OH_ARCH_CPU}" ] &&
+		return 1
+	[ "${_pkgvendor}" != any -a "${_pkgvendor}" != "${OH_ARCH_VENDOR}" ] &&
+		return 1
+	[ "${_pkgkernel}" != any -a "${_pkgkernel}" != "${OH_ARCH_KERNEL}" ] &&
+		return 1
+	[ "${_pkglibs}" != any -a "${_pkglibs}" != "${OH_ARCH_LIBS}" ] &&
+		return 1
+
+	return 0
+}
+
+oh_get_package_architecture()
+{
+	_pkgarch=$(oh_get_field "${1}" Architecture)
+
+	# "all".
+	if [ "${_pkgarch}" = all ]; then
+		echo all
+		return 0
+	fi
+
+	# Target platform.
+	if [ -n "$(echo "${_pkgarch}" | grep -E '^[^-]+$')" ]; then
+		echo "${_pkgarch}"
+		return 0
+	fi
+
+	# "any" or target binary architecture.
+	echo "${OH_ARCH}"
+	return 0
+}
--
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