From: Hugo Landau <hlandau@openssl.org>
Date: Thu, 9 Nov 2023 10:27:13 +0000 (+0000)
Subject: list.h: Add iterator macros
X-Git-Tag: openssl-3.3.0-alpha1~448
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=70a7e543a1bf9ff6d404b6897bc53fd2e5349b9c;p=thirdparty%2Fopenssl.git

list.h: Add iterator macros

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22674)
---

diff --git a/include/internal/list.h b/include/internal/list.h
index de2a102cd44..902047641f7 100644
--- a/include/internal/list.h
+++ b/include/internal/list.h
@@ -20,6 +20,34 @@
 #  define OSSL_LIST_DBG(x) x;
 # endif
 
+# define LIST_FOREACH_FROM(p, name, init)                                   \
+    for ((p) = (init);                                                      \
+         (p) != NULL;                                                       \
+         (p) = ossl_list_##name##_next(p))
+# define LIST_FOREACH(p, name, l)                                           \
+    LIST_FOREACH_FROM(p, name, ossl_list_##name##_head(l))
+
+# define LIST_FOREACH_REV_FROM(p, name, init)                               \
+    for ((p) = (init);                                                      \
+         (p) != NULL;                                                       \
+         (p) = ossl_list_##name##_prev(p))
+# define LIST_FOREACH_REV(p, name, l)                                       \
+    LIST_FOREACH_FROM(p, name, ossl_list_##name##_tail(l))
+
+# define LIST_FOREACH_DELSAFE_FROM(p, pn, name, init)                       \
+    for ((p) = (init);                                                      \
+         (p) != NULL && (((pn) = ossl_list_##name##_next(p)), 1);           \
+         (p) = (pn))
+#define LIST_FOREACH_DELSAFE(p, pn, name, l)                                \
+    LIST_FOREACH_DELSAFE_FROM(p, pn, name, ossl_list_##name##_head(l))
+
+# define LIST_FOREACH_REV_DELSAFE_FROM(p, pn, name, init)                   \
+    for ((p) = (init);                                                      \
+         (p) != NULL && (((pn) = ossl_list_##name##_prev(p)), 1);           \
+         (p) = (pn))
+# define LIST_FOREACH_REV_DELSAFE(p, pn, name, l)                           \
+    LIST_FOREACH_REV_DELSAFE_FROM(p, pn, name, ossl_list_##name##_tail(l))
+
 /* Define a list structure */
 # define OSSL_LIST(name) OSSL_LIST_ ## name