Add nautilus-macros.m4

svn path=/trunk/; revision=1655

1 files changed, 56 insertions, 0 deletions

diff --git a/hack-macros/nautilus-macros.m4 b/hack-macros/nautilus-macros.m4
new file mode 100644
index 00000000..5c4e0f64
--- /dev/null
+++ b/hack-macros/nautilus-macros.m4
@@ -0,0 +1,56 @@
+dnl
+dnl NAUTILUS_VERSION_CANON(version)
+dnl                     1
+AC_DEFUN(NAUTILUS_VERSION_CANON, [`
+
+	dnl Assumes that there are no more than 999 revisions at a level,
+	dnl no more than three levels of revision.
+	dnl
+	dnl Any more than that, and test starts messing up the numeric
+	dnl comparisons because its integers overflow, and there's no
+	dnl way to do string comparisons in the shell.  Grr.
+	dnl
+	dnl Must come up with some way to fix this.
+
+	echo "$1" |
+	tr . '\012' |
+	sed -e 's/^/000/' -e 's/^.*\(...\)/\1/' |
+	tr -d '\012' |
+	sed 's/$/000000000/
+	     s/^\(.........\).*/\1/'
+`])
+
+dnl NAUTILUS_VERSION_INSIST(package, get-version-cmd, operator, want-version-var)
+dnl                      1        2                3         4
+
+AC_DEFUN(NAUTILUS_VERSION_INSIST, [
+	ez_want_version=[$]$4
+
+	case "$3" in
+		">")	ez_operator=-gt ;;
+		">=")	ez_operator=-ge ;;
+		"<")	ez_operator=-lt ;;
+		"<=")	ez_operator=-le ;;
+		"=")	ez_operator=-eq ;;
+		"!=")	ez_operator=-ne ;;
+		*)	AC_ERROR(Unknown operator $3 in configure script) ;;
+	esac
+
+	AC_MSG_CHECKING(for $1 $3 [$ez_want_version])
+
+	if ez_installed_version="`$2`"
+	then
+		AC_MSG_RESULT([$ez_installed_version])
+	else
+		AC_ERROR($2 failed)
+	fi
+
+	if test "NAUTILUS_VERSION_CANON([$ez_installed_version])" "$ez_operator" \
+		"NAUTILUS_VERSION_CANON([$ez_want_version])"
+	then
+		:
+		AC_SUBST($4)
+	else
+		AC_ERROR($1 version [$ez_want_version] is required.)
+	fi
+])