etags ‘fatal’ function is now printf-like

* lib-src/etags.c (fatal): Now printf-like.  All callers changed.
Also, now static; not clear why it needed to be extern.
(verror): New function, with most of the old contents of ‘error’.
(fatal, error): Use it.

1 files changed, 21 insertions, 11 deletions

diff --git a/lib-src/etags.c b/lib-src/etags.c
index f34c985109d..7baff8cbfe8 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -361,8 +361,9 @@ static void analyze_regex (char *);
 static void free_regexps (void);
 static void regex_tag_multiline (void);
 static void error (const char *, ...) ATTRIBUTE_FORMAT_PRINTF (1, 2);
+static void verror (char const *, va_list) ATTRIBUTE_FORMAT_PRINTF (1, 0);
 static _Noreturn void suggest_asking_for_help (void);
-_Noreturn void fatal (const char *, const char *);
+static _Noreturn void fatal (char const *, ...) ATTRIBUTE_FORMAT_PRINTF (1, 2);
 static _Noreturn void pfatal (const char *);
 static void add_node (node *, node **);
 
@@ -1091,7 +1092,7 @@ main (int argc, char **argv)
         ++current_arg;
         ++file_count;
         if (parsing_stdin)
-          fatal ("cannot parse standard input more than once", (char *)NULL);
+          fatal ("cannot parse standard input more than once");
         parsing_stdin = true;
         break;
 
@@ -1255,8 +1256,8 @@ main (int argc, char **argv)
               if (streq (this_file, "-"))
                 {
                   if (parsing_stdin)
-                    fatal ("cannot parse standard input AND read file names from it",
-                           (char *)NULL);
+                    fatal ("cannot parse standard input "
+                           "AND read file names from it");
                   while (readline_internal (&filename_lb, stdin, "-") > 0)
                     process_file_name (filename_lb.buffer, lang);
                 }
@@ -1324,7 +1325,7 @@ main (int argc, char **argv)
           z = stpcpy (z, tagfile);
           strcpy (z, ";rm OTAGS");
           if (system (cmd) != EXIT_SUCCESS)
-            fatal ("failed to execute shell command", (char *)NULL);
+            fatal ("failed to execute shell command");
         }
       free (cmd);
       append_to_tagfile = true;
@@ -6351,10 +6352,13 @@ skip_name (char *cp)
 }
 
 /* Print error message and exit.  */
-void
-fatal (const char *s1, const char *s2)
+static void
+fatal (char const *format, ...)
 {
-  error (s1, s2);
+  va_list ap;
+  va_start (ap, format);
+  verror (format, ap);
+  va_end (ap);
   exit (EXIT_FAILURE);
 }
 
@@ -6379,10 +6383,16 @@ error (const char *format, ...)
 {
   va_list ap;
   va_start (ap, format);
+  verror (format, ap);
+  va_end (ap);
+}
+
+static void
+verror (char const *format, va_list ap)
+{
   fprintf (stderr, "%s: ", progname);
   vfprintf (stderr, format, ap);
   fprintf (stderr, "\n");
-  va_end (ap);
 }
 
 /* Return a newly-allocated string whose contents
@@ -6673,7 +6683,7 @@ xmalloc (size_t size)
 {
   void *result = malloc (size);
   if (result == NULL)
-    fatal ("virtual memory exhausted", (char *)NULL);
+    fatal ("virtual memory exhausted");
   return result;
 }
 
@@ -6682,7 +6692,7 @@ xrealloc (void *ptr, size_t size)
 {
   void *result = realloc (ptr, size);
   if (result == NULL)
-    fatal ("virtual memory exhausted", (char *)NULL);
+    fatal ("virtual memory exhausted");
   return result;
 }