shared: add nm_utils_g_slist_strlist_cmp() util

Usually we avoid GSList, because I think it's not a great data type.
Anyway, our match-specs are just a GSList of strings, so we need some
API to handle them.

2 files changed, 21 insertions, 0 deletions

diff --git a/shared/nm-glib-aux/nm-shared-utils.c b/shared/nm-glib-aux/nm-shared-utils.c
index 6ed86f5916..c8b0eef84e 100644
--- a/shared/nm-glib-aux/nm-shared-utils.c
+++ b/shared/nm-glib-aux/nm-shared-utils.c
@@ -2709,6 +2709,25 @@ nm_utils_g_slist_find_str (const GSList *list,
 	return NULL;
 }
 
+/**
+ * nm_utils_g_slist_strlist_cmp:
+ * @a: the left #GSList of strings
+ * @b: the right #GSList of strings to compare.
+ *
+ * Compares two string lists. The data elements are compared with
+ * strcmp(), alloing %NULL elements.
+ *
+ * Returns: 0, 1, or -1, depending on how the lists compare.
+ */
+int
+nm_utils_g_slist_strlist_cmp (const GSList *a, const GSList *b)
+{
+	for (; a && b; a = a->next, b = b->next)
+		NM_CMP_DIRECT_STRCMP0 (a->data, b->data);
+	NM_CMP_SELF (a, b);
+	return 0;
+}
+
 /*****************************************************************************/
 
 gpointer
diff --git a/shared/nm-glib-aux/nm-shared-utils.h b/shared/nm-glib-aux/nm-shared-utils.h
index 8f11a9b0c3..a8f2966b38 100644
--- a/shared/nm-glib-aux/nm-shared-utils.h
+++ b/shared/nm-glib-aux/nm-shared-utils.h
@@ -981,6 +981,8 @@ nm_utils_strv_make_deep_copied_nonnull (const char **strv)
 GSList *nm_utils_g_slist_find_str (const GSList *list,
                                    const char *needle);
 
+int nm_utils_g_slist_strlist_cmp (const GSList *a, const GSList *b);
+
 /*****************************************************************************/
 
 gssize nm_utils_ptrarray_find_binary_search (gconstpointer *list,