Remove redundant GAIH_OKIFUNSPEC and GAIH_EAI.

Only gaih_inet() and gaih_inet_serv() use a special bit flag denoted
by the GAIH_OKIFUNSPEC macro. Only the return value of
gaih_inet_serv() is actively checked for the bit flag which is
redundant because it just copies the nonzero property of the value
otherwise returned. The return value of gaih_inet() is only checked
for being zero and then the bit flag is filtered out. As the bit flag
is set only for otherwise nonzero return values, it doesn't affect the
zero comparison. GAIH_EAI just an alias to ~GAIH_OKIFUNSPEC.

ChangeLog

@@ -1,5 +1,11 @@
 2013-12-02  Pavel Simerda  <psimerda@redhat.com>
 
+	* sysdeps/posix/getaddrinfo.c (GAIH_OKIFUNSPEC): Remove macro.
+	(GAIH_EAI): Likewise.
+	(gaih_inet_serv): Don't use GAIH_OKIFUNSPEC.
+	(gaih_inet): Likewise.
+	(getaddrinfo): Don't use GAIH_EAI.
+
 	* sysdeps/posix/getaddrinfo.c (UNIX_PATH_MAX): Remove macro.
 	(struct gaih): Remove definition.
 

sysdeps/posix/getaddrinfo.c

@@ -71,9 +71,6 @@ extern int __idna_to_unicode_lzlz (const char *input, char **output,
 # include <libidn/idna.h>
 #endif
 
-#define GAIH_OKIFUNSPEC 0x0100
-#define GAIH_EAI        ~(GAIH_OKIFUNSPEC)
-
 struct gaih_service
   {
     const char *name;
@@ -157,7 +154,7 @@ gaih_inet_serv (const char *servicename, const struct gaih_typeproto *tp,
 	  if (r == ERANGE)
 	    tmpbuflen *= 2;
 	  else
-	    return GAIH_OKIFUNSPEC | -EAI_SERVICE;
+	    return -EAI_SERVICE;
 	}
     }
   while (r);
@@ -299,17 +296,17 @@ gaih_inet (const char *name, const struct gaih_service *service,
       if (! tp->name[0])
 	{
 	  if (req->ai_socktype)
-	    return GAIH_OKIFUNSPEC | -EAI_SOCKTYPE;
+	    return -EAI_SOCKTYPE;
 	  else
-	    return GAIH_OKIFUNSPEC | -EAI_SERVICE;
+	    return -EAI_SERVICE;
 	}
     }
 
   int port = 0;
   if (service != NULL)
     {
       if ((tp->protoflag & GAI_PROTO_NOSERVICE) != 0)
-	return GAIH_OKIFUNSPEC | -EAI_SERVICE;
+	return -EAI_SERVICE;
 
       if (service->num < 0)
 	{
@@ -345,7 +342,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
 
 		  if ((rc = gaih_inet_serv (service->name, tp, req, newp)))
 		    {
-		      if (rc & GAIH_OKIFUNSPEC)
+		      if (rc)
 			continue;
 		      return rc;
 		    }
@@ -354,7 +351,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
 		  pst = &(newp->next);
 		}
 	      if (st == (struct gaih_servtuple *) &nullserv)
-		return GAIH_OKIFUNSPEC | -EAI_SERVICE;
+		return -EAI_SERVICE;
 	    }
 	}
       else
@@ -546,7 +543,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
 							10);
 		      if (*end != '\0')
 			{
-			  result = GAIH_OKIFUNSPEC | -EAI_NONAME;
+			  result = -EAI_NONAME;
 			  goto free_and_return;
 			}
 		    }
@@ -667,7 +664,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
 		  else
 		    /* We made requests but they turned out no data.
 		       The name is known, though.  */
-		    result = GAIH_OKIFUNSPEC | -EAI_NODATA;
+		    result = -EAI_NODATA;
 
 		  goto free_and_return;
 		}
@@ -773,7 +770,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
 
 		  if (at->family == AF_UNSPEC)
 		    {
-		      result = GAIH_OKIFUNSPEC | -EAI_NONAME;
+		      result = -EAI_NONAME;
 		      goto free_and_return;
 		    }
 
@@ -1064,7 +1061,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
 
 	  if (h_errno == NETDB_INTERNAL)
 	    {
-	      result = GAIH_OKIFUNSPEC | -EAI_SYSTEM;
+	      result = -EAI_SYSTEM;
 	      goto free_and_return;
 	    }
 
@@ -1076,7 +1073,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
 	      else
 		/* We made requests but they turned out no data.  The name
 		   is known, though.  */
-		result = GAIH_OKIFUNSPEC | -EAI_NODATA;
+		result = -EAI_NODATA;
 
 	      goto free_and_return;
 	    }
@@ -1085,7 +1082,7 @@ gaih_inet (const char *name, const struct gaih_service *service,
     process_list:
       if (at->family == AF_UNSPEC)
 	{
-	  result = GAIH_OKIFUNSPEC | -EAI_NONAME;
+	  result = -EAI_NONAME;
 	  goto free_and_return;
 	}
     }
@@ -2412,7 +2409,7 @@ getaddrinfo (const char *name, const char *service,
 	  freeaddrinfo (p);
 	  __free_in6ai (in6ai);
 
-	  return -(last_i & GAIH_EAI);
+	  return -last_i;
 	}
       while (*end)
 	{
@@ -2645,7 +2642,7 @@ getaddrinfo (const char *name, const char *service,
       return 0;
     }
 
-  return last_i ? -(last_i & GAIH_EAI) : EAI_NONAME;
+  return last_i ? -last_i : EAI_NONAME;
 }
 libc_hidden_def (getaddrinfo)