From: Gustavo Sverzut Barbieri <barbieri@profusion.mobi>
Date: Sat, 17 Dec 2011 00:33:08 +0000 (-0200)
Subject: introduce kmod_list_foreach_reverse().
X-Git-Tag: v2~49
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d6b55b7d18f7f70d35b21705d0f45044b98141ab;p=thirdparty%2Fkmod.git

introduce kmod_list_foreach_reverse().

walks the list in the reverse order.
---

diff --git a/libkmod/libkmod-private.h b/libkmod/libkmod-private.h
index 85cfc125..6c8fed23 100644
--- a/libkmod/libkmod-private.h
+++ b/libkmod/libkmod-private.h
@@ -67,6 +67,13 @@ struct kmod_list *kmod_list_append_list(struct kmod_list *list1, struct kmod_lis
 		list_entry = (list_entry->node.next == &((first_entry)->node)) ? NULL : \
 		container_of(list_entry->node.next, struct kmod_list, node))
 
+#undef kmod_list_foreach_reverse
+#define kmod_list_foreach_reverse(list_entry, first_entry) \
+	for (list_entry = (((first_entry) == NULL) ? NULL : container_of(first_entry->node.prev, struct kmod_list, node)); \
+		list_entry != NULL; \
+		list_entry = ((list_entry == first_entry) ? NULL :	\
+		container_of(list_entry->node.prev, struct kmod_list, node)))
+
 /* libkmod.c */
 const char *kmod_get_dirname(const struct kmod_ctx *ctx) __attribute__((nonnull(1)));
 
diff --git a/libkmod/libkmod.h b/libkmod/libkmod.h
index 37abbcc6..76eaf8ea 100644
--- a/libkmod/libkmod.h
+++ b/libkmod/libkmod.h
@@ -69,6 +69,11 @@ struct kmod_list *kmod_list_last(const struct kmod_list *first_entry);
 		list_entry != NULL; \
 		list_entry = kmod_list_next(first_entry, list_entry))
 
+#define kmod_list_foreach_reverse(list_entry, first_entry) \
+	for (list_entry = kmod_list_last(first_entry); \
+		list_entry != NULL; \
+		list_entry = kmod_list_prev(first_entry, list_entry))
+
 /* Removal flags, not implemented yet */
 enum kmod_remove {
 	KMOD_REMOVE_FORCE = O_TRUNC,