Minor code cleanup.

[bison.git] / src / uniqstr.c

diff --git a/src/uniqstr.c b/src/uniqstr.c
index 4a345d48c69b5a283efd727e795de3c27dfda5c2..ed8f79a78f8c8467329aa787f3f8ec68f592f35c 100644 (file)
--- a/src/uniqstr.c
+++ b/src/uniqstr.c
@@ -1,29 +1,29 @@
 /* Keep a unique copy of strings.
 
-   Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003, 2004, 2005, 2009 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
-   Bison is free software; you can redistribute it and/or modify
+   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
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
 
-   Bison is distributed in the hope that it will be useful,
+   This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with Bison; see the file COPYING.  If not, write to
-   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+#include <config.h>
 #include "system.h"
 
 #include <error.h>
 #include <hash.h>
 #include <quotearg.h>
+#include <stdarg.h>
 
 #include "uniqstr.h"
 
@@ -48,11 +48,27 @@ uniqstr_new (char const *str)
     {
       /* First insertion in the hash. */
       res = xstrdup (str);
-      hash_insert (uniqstrs_table, res);
+      if (!hash_insert (uniqstrs_table, res))
+        xalloc_die ();
     }
   return res;
 }
 
+uniqstr
+uniqstr_vsprintf (char const *format, ...)
+{
+  va_list args;
+  size_t length;
+  va_start (args, format);
+  length = vsnprintf (NULL, 0, format, args);
+  va_end (args);
+
+  char res[length + 1];
+  va_start (args, format);
+  vsprintf (res, format, args);
+  va_end (args);
+  return uniqstr_new (res);
+}
 
 /*------------------------------.
 | Abort if S is not a uniqstr.  |
@@ -63,7 +79,8 @@ uniqstr_assert (char const *str)
 {
   if (!hash_lookup (uniqstrs_table, str))
     {
-      error (0, 0, "not a uniqstr: %s", quotearg (str));
+      error (0, 0,
+            "not a uniqstr: %s", quotearg (str));
       abort ();
     }
 }