Updated README.

[adns] / src / general.c

diff --git a/src/general.c b/src/general.c
index 71009f7d674c36d22221e1708fba911c10bcccd7..ae7cac0f2b06910c7ece07346208e42788a28e21 100644 (file)
--- a/src/general.c
+++ b/src/general.c
@@ -4,7 +4,12 @@
  * - vbuf handling
  */
 /*
- *  This file is part of adns, which is Copyright (C) 1997-1999 Ian Jackson
+ *  This file is
+ *    Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
+ *
+ *  It is part of adns, which is
+ *    Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
+ *    Copyright (C) 1999 Tony Finch <dot@dotat.at>
  *  
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -22,7 +27,6 @@
  */
 
 #include <stdlib.h>
-#include <string.h>
 
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -200,6 +204,7 @@ adns_status adns_rr_info(adns_rrtype type,
   return st;
 }
 
+
 #define SINFO(n,s) { adns_s_##n, #n, s }
 
 static const struct sinfo {
@@ -211,6 +216,7 @@ static const struct sinfo {
 
   SINFO(  nomemory,            "Out of memory"                                 ),
   SINFO(  unknownrrtype,       "Query not implemented in DNS library"          ),
+  SINFO(  systemfail,          "General resolver or system failure"            ),
 
   SINFO(  timeout,             "DNS query timed out"                           ),
   SINFO(  allservfail,         "All nameservers failed"                        ),
@@ -225,7 +231,7 @@ static const struct sinfo {
   SINFO(  rcodeunknown,        "Nameserver sent unknown response code"         ),
   
   SINFO(  inconsistent,        "Inconsistent resource records in DNS"          ),
-  SINFO(  prohibitedcname,     "DNS data refers to an alias"                   ),
+  SINFO(  prohibitedcname,     "DNS alias found where canonical name wanted"   ),
   SINFO(  answerdomaininvalid, "Found syntactically invalid domain name"       ),
   SINFO(  answerdomaintoolong, "Found overly-long domain name"                 ),
   SINFO(  invaliddata,         "Found invalid DNS data"                        ),
@@ -235,7 +241,7 @@ static const struct sinfo {
   SINFO(  querydomaintoolong,  "Domain name is too long"                       ),
 
   SINFO(  nxdomain,            "No such domain"                                ),
-  SINFO(  nodata,              "No such data"                                  ),
+  SINFO(  nodata,              "No such data"                                  )
 };
 
 static int si_compar(const void *key, const void *elem) {
@@ -263,6 +269,43 @@ const char *adns_errabbrev(adns_status st) {
   return si->abbrev;
 }
 
+
+#define STINFO(max) { adns_s_max_##max, #max }
+
+static const struct stinfo {
+  adns_status stmax;
+  const char *abbrev;
+} stinfos[]= {
+  { adns_s_ok, "ok" },
+  STINFO(  localfail   ),
+  STINFO(  remotefail  ),
+  STINFO(  tempfail    ),
+  STINFO(  misconfig   ),
+  STINFO(  misquery    ),
+  STINFO(  permfail    )
+};
+
+static int sti_compar(const void *key, const void *elem) {
+  const adns_status *st= key;
+  const struct stinfo *sti= elem;
+
+  adns_status here, min, max;
+
+  here= *st;
+  min= (sti==stinfos) ? 0 : sti[-1].stmax+1;
+  max= sti->stmax;
+  
+  return here < min  ? -1 : here > max ? 1 : 0;
+}
+
+const char *adns_errtypeabbrev(adns_status st) {
+  const struct stinfo *sti;
+
+  sti= bsearch(&st,stinfos,sizeof(stinfos)/sizeof(*stinfos),sizeof(*stinfos),sti_compar);
+  return sti->abbrev;
+}
+
+
 void adns__isort(void *array, int nobjs, int sz, void *tempbuf,
                 int (*needswap)(void *context, const void *a, const void *b),
                 void *context) {