X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/23d13411c85d3a8705f9507219f61eddea57a218..2646fd012dd6e164eb89ff9f705ac5a75bb3770a:/src/uniqstr.c

diff --git a/src/uniqstr.c b/src/uniqstr.c
index f2954443..a4e2db0e 100644
--- a/src/uniqstr.c
+++ b/src/uniqstr.c
@@ -1,6 +1,6 @@
 /* Keep a unique copy of strings.
 
-   Copyright (C) 2002-2005, 2009-2012 Free Software Foundation, Inc.
+   Copyright (C) 2002-2005, 2009-2015 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -77,7 +77,8 @@ uniqstr_vsprintf (char const *format, ...)
 void
 uniqstr_assert (char const *str)
 {
-  if (!hash_lookup (uniqstrs_table, str))
+  uniqstr s = hash_lookup (uniqstrs_table, str);
+  if (!s || s != str)
     {
       error (0, 0,
              "not a uniqstr: %s", quotearg (str));
@@ -103,7 +104,17 @@ uniqstr_print_processor (void *ustr, void *null ATTRIBUTE_UNUSED)
   return uniqstr_print (ustr);
 }
 
-
+
+int
+uniqstr_cmp (uniqstr l, uniqstr r)
+{
+  return (l == r ? 0
+          : !l ? -1
+          : !r ? +1
+          : strcmp (l, r));
+}
+
+
 /*-----------------------.
 | A uniqstr hash table.  |
 `-----------------------*/
@@ -120,6 +131,7 @@ hash_uniqstr (void const *m, size_t tablesize)
   return hash_string (m, tablesize);
 }
 
+
 /*----------------------------.
 | Create the uniqstrs table.  |
 `----------------------------*/