Constified some arguments in local functions.

ares_gethostbyaddr.c

@@ -66,7 +66,7 @@ static void addr_callback(void *arg, int status, int timeouts,
 static void end_aquery(struct addr_query *aquery, int status,
                        struct hostent *host);
 static int file_lookup(struct ares_addr *addr, struct hostent **host);
-static void ptr_rr_name(char *name, struct ares_addr *addr);
+static void ptr_rr_name(char *name, const struct ares_addr *addr);
 
 void ares_gethostbyaddr(ares_channel channel, const void *addr, int addrlen,
                         int family, ares_host_callback callback, void *arg)
@@ -252,7 +252,7 @@ static int file_lookup(struct ares_addr *addr, struct hostent **host)
   return status;
 }
 
-static void ptr_rr_name(char *name, struct ares_addr *addr)
+static void ptr_rr_name(char *name, const struct ares_addr *addr)
 {
   if (addr->family == AF_INET)
     {
@@ -267,7 +267,7 @@ static void ptr_rr_name(char *name, struct ares_addr *addr)
     {
        unsigned char *bytes = (unsigned char *)&addr->addrV6.s6_addr;
        /* There are too many arguments to do this in one line using
-	* minimally C89-compliant compilers */
+        * minimally C89-compliant compilers */
        sprintf(name,
                 "%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.",
                 bytes[15]&0xf, bytes[15] >> 4, bytes[14]&0xf, bytes[14] >> 4,

ares_gethostbyname.c

@@ -74,13 +74,13 @@ static void end_hquery(struct host_query *hquery, int status,
 static int fake_hostent(const char *name, int family, ares_host_callback callback,
                         void *arg);
 static int file_lookup(const char *name, int family, struct hostent **host);
-static void sort_addresses(struct hostent *host, struct apattern *sortlist,
+static void sort_addresses(struct hostent *host, const struct apattern *sortlist,
                            int nsort);
-static void sort6_addresses(struct hostent *host, struct apattern *sortlist,
+static void sort6_addresses(struct hostent *host, const struct apattern *sortlist,
                            int nsort);
-static int get_address_index(struct in_addr *addr, struct apattern *sortlist,
+static int get_address_index(const struct in_addr *addr, const struct apattern *sortlist,
                              int nsort);
-static int get6_address_index(struct in6_addr *addr, struct apattern *sortlist,
+static int get6_address_index(const struct in6_addr *addr, const struct apattern *sortlist,
                              int nsort);
 
 void ares_gethostbyname(ares_channel channel, const char *name, int family,
@@ -391,7 +391,7 @@ static int file_lookup(const char *name, int family, struct hostent **host)
   return status;
 }
 
-static void sort_addresses(struct hostent *host, struct apattern *sortlist,
+static void sort_addresses(struct hostent *host, const struct apattern *sortlist,
                            int nsort)
 {
   struct in_addr a1, a2;
@@ -421,7 +421,8 @@ static void sort_addresses(struct hostent *host, struct apattern *sortlist,
 /* Find the first entry in sortlist which matches addr.  Return nsort
  * if none of them match.
  */
-static int get_address_index(struct in_addr *addr, struct apattern *sortlist,
+static int get_address_index(const struct in_addr *addr,
+                             const struct apattern *sortlist,
                              int nsort)
 {
   int i;
@@ -446,7 +447,7 @@ static int get_address_index(struct in_addr *addr, struct apattern *sortlist,
   return i;
 }
 
-static void sort6_addresses(struct hostent *host, struct apattern *sortlist,
+static void sort6_addresses(struct hostent *host, const struct apattern *sortlist,
                            int nsort)
 {
   struct in6_addr a1, a2;
@@ -476,8 +477,9 @@ static void sort6_addresses(struct hostent *host, struct apattern *sortlist,
 /* Find the first entry in sortlist which matches addr.  Return nsort
  * if none of them match.
  */
-static int get6_address_index(struct in6_addr *addr, struct apattern *sortlist,
-                             int nsort)
+static int get6_address_index(const struct in6_addr *addr,
+                              const struct apattern *sortlist,
+                              int nsort)
 {
   int i;