Replace magic numbers with consts for evdns_base_resolv_conf_parse() errors

1 files changed, 22 insertions, 3 deletions

diff --git a/include/event2/dns.h b/include/event2/dns.h
index be61e783..17a00cff 100644
--- a/include/event2/dns.h
+++ b/include/event2/dns.h
@@ -261,6 +261,21 @@ struct event_base;
  * @see DNS_OPTION_NAMESERVERS_NO_DEFAULT */
 #define EVDNS_BASE_NAMESERVERS_NO_DEFAULT 0x10000
 
+/* No errors */
+#define EVDNS_ERROR_NONE 0
+/* Failed to open file */
+#define EVDNS_ERROR_FAILED_TO_OPEN_FILE 1
+/* Failed to stat file */
+#define EVDNS_ERROR_FAILED_TO_STAT_FILE 2
+/* File too large */
+#define EVDNS_ERROR_FILE_TOO_LARGE 3
+/* Out of memory */
+#define EVDNS_ERROR_OUT_OF_MEMORY 4
+/* Short read from file */
+#define EVDNS_ERROR_SHORT_READ_FROM_FILE 5
+/* No nameservers configured */
+#define EVDNS_ERROR_NO_NAMESERVERS_CONFIGURED 6
+
 /**
   Initialize the asynchronous DNS library.
 
@@ -511,9 +526,13 @@ int evdns_base_set_option(struct evdns_base *base, const char *option, const cha
   The following directives are not parsed from the file: sortlist, rotate,
   no-check-names, inet6, debug.
 
-  If this function encounters an error, the possible return values are: 1 =
-  failed to open file, 2 = failed to stat file, 3 = file too large, 4 = out of
-  memory, 5 = short read from file, 6 = no nameservers listed in the file
+  If this function encounters an error, the possible return values are:
+   EVDNS_ERROR_FAILED_TO_OPEN_FILE (1) - failed to open file
+   EVDNS_ERROR_FAILED_TO_STAT_FILE (2) - failed to stat file
+   EVDNS_ERROR_FILE_TOO_LARGE (3) - file too large
+   EVDNS_ERROR_OUT_OF_MEMORY (4) - out of memory
+   EVDNS_ERROR_SHORT_READ_FROM_FILE (5) - short read from file
+   EVDNS_ERROR_NO_NAMESERVERS_CONFIGURED (6) - no nameservers configured.
 
   @param base the evdns_base to which to apply this operation
   @param flags any of DNS_OPTION_NAMESERVERS|DNS_OPTION_SEARCH|DNS_OPTION_MISC|