constification

[exim.git] / src / src / tree.c

diff --git a/src/src/tree.c b/src/src/tree.c
index d5a4096510d8853bea0377172fad95a58c6ada67..f2c97db1e087575f0473846cbb4b45a03705dbfb 100644 (file)
--- a/src/src/tree.c
+++ b/src/src/tree.c
@@ -3,6 +3,7 @@
 *************************************************/
 
 /* Copyright (c) University of Cambridge 1995 - 2015 */
+/* Copyright (c) The Exim Maintainers 2021 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* Functions for maintaining binary balanced trees and some associated
@@ -27,7 +28,7 @@ Returns:  nothing
 */
 
 void
-tree_add_nonrecipient(uschar *s)
+tree_add_nonrecipient(const uschar *s)
 {
 rmark rpoint = store_mark();
 tree_node *node = store_get(sizeof(tree_node) + Ustrlen(s), is_tainted(s));
@@ -52,7 +53,7 @@ Returns:  nothing
 */
 
 void
-tree_add_duplicate(uschar *s, address_item *addr)
+tree_add_duplicate(const uschar *s, address_item *addr)
 {
 rmark rpoint = store_mark();
 tree_node *node = store_get(sizeof(tree_node) + Ustrlen(s), is_tainted(s));
@@ -74,7 +75,7 @@ Returns:     nothing
 */
 
 void
-tree_add_unusable(host_item *h)
+tree_add_unusable(const host_item *h)
 {
 rmark rpoint = store_mark();
 tree_node *node;