From: Consolatis <35009135+Consolatis@users.noreply.github.com>
Date: Tue, 21 Nov 2023 02:07:10 +0000 (+0100)
Subject: common/array.h: add wl_array_for_each_reverse macro
X-Git-Url: https://git.mdlowis.com/?a=commitdiff_plain;h=042215f856d6335ec21d84deaba25c002057a817;p=proto%2Flabwc.git

common/array.h: add wl_array_for_each_reverse macro
---

diff --git a/include/common/array.h b/include/common/array.h
index 4f6e6237..f6c51fc9 100644
--- a/include/common/array.h
+++ b/include/common/array.h
@@ -30,4 +30,15 @@ wl_array_len(struct wl_array *array)
 	return array->size / sizeof(const char *);
 }
 
+/**
+ * Iterates in reverse over an array.
+ * @pos: pointer that each array element will be assigned to
+ * @array: wl_array to iterate over
+ */
+#define wl_array_for_each_reverse(pos, array)                                          \
+	for (pos = !(array)->data ? NULL                                               \
+		: (void *)((const char *)(array)->data + (array)->size - sizeof(pos)); \
+		pos && (const char *)pos >= (const char *)(array)->data;               \
+		(pos)--)
+
 #endif /* LABWC_ARRAY_H */
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 53d6d268..14fdb88e 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -5531,6 +5531,7 @@ sub process {
 			#
 			if ($starts_with_if_while_etc && !length($s)
 					&& $filename ne "include/view.h"
+					&& $filename ne "include/common/array.h"
 					&& $filename ne "include/ssd-internal.h") {
 				CHK("BRACES", "[labwc-custom] open brace { expected after if/while/for/switch - even with single statement blocks");
 			}