From 5c0ec3e3564b3653b58ef2e868364ae35a552c42 Mon Sep 17 00:00:00 2001
From: Esa Korhonen <esa.korhonen@mariadb.com>
Date: Wed, 8 Mar 2017 09:50:53 +0200
Subject: [PATCH] Make hint.c/hint.h const correct

Not a rigorous pass, just added const to the more obvious places.
---
 include/maxscale/hint.h | 12 ++++++------
 server/core/hint.c      | 10 +++++-----
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/include/maxscale/hint.h b/include/maxscale/hint.h
index 926649889..d91c3523a 100644
--- a/include/maxscale/hint.h
+++ b/include/maxscale/hint.h
@@ -50,11 +50,11 @@ typedef struct hint
     struct hint     *next;  /*< Another hint for this buffer */
 } HINT;
 
-extern  HINT    *hint_alloc(HINT_TYPE, void *, unsigned int);
-extern  HINT    *hint_create_parameter(HINT *, char *, char *);
-extern  HINT    *hint_create_route(HINT *, HINT_TYPE, char *);
-extern  void    hint_free(HINT *);
-extern  HINT    *hint_dup(HINT *);
-bool            hint_exists(HINT **, HINT_TYPE);
+HINT *hint_alloc(HINT_TYPE, void *, unsigned int);
+HINT *hint_create_parameter(HINT *, char *, const char *);
+HINT *hint_create_route(HINT *, HINT_TYPE, const char *);
+void hint_free(HINT *);
+HINT *hint_dup(const HINT *);
+bool hint_exists(HINT **, HINT_TYPE);
 
 MXS_END_DECLS
diff --git a/server/core/hint.c b/server/core/hint.c
index a72506903..dcb290f2b 100644
--- a/server/core/hint.c
+++ b/server/core/hint.c
@@ -38,11 +38,11 @@
  * Note : Optimize this to use version numbering instead of copying memory
  */
 HINT *
-hint_dup(HINT *hint)
+hint_dup(const HINT *hint)
 {
-    HINT *nlhead = NULL, *nltail = NULL, *ptr1, *ptr2;
+    const HINT *ptr1 = hint;
+    HINT *nlhead = NULL, *nltail = NULL, *ptr2;
 
-    ptr1 = hint;
     while (ptr1)
     {
         if ((ptr2 = (HINT *)MXS_MALLOC(sizeof(HINT))) == NULL)
@@ -91,7 +91,7 @@ hint_dup(HINT *hint)
  * @return The result hint list
  */
 HINT *
-hint_create_route(HINT *head, HINT_TYPE type, char *data)
+hint_create_route(HINT *head, HINT_TYPE type, const char *data)
 {
     HINT *hint;
 
@@ -122,7 +122,7 @@ hint_create_route(HINT *head, HINT_TYPE type, char *data)
  * @return The result hint list
  */
 HINT *
-hint_create_parameter(HINT *head, char *pname, char *value)
+hint_create_parameter(HINT *head, char *pname, const char *value)
 {
     HINT *hint;