gnulib: update

[bison.git] / src / uniqstr.c

diff --git a/src/uniqstr.c b/src/uniqstr.c
index 644477bed20a89801e5782082c3ccbc245cd4712..a4e2db0ef940dc1f23be8764825d5e2196d01c24 100644 (file)
--- a/src/uniqstr.c
+++ b/src/uniqstr.c
@@ -1,6 +1,6 @@
 /* Keep a unique copy of strings.
 
-   Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2002-2005, 2009-2015 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -23,6 +23,7 @@
 #include <error.h>
 #include <hash.h>
 #include <quotearg.h>
+#include <stdarg.h>
 
 #include "uniqstr.h"
 
@@ -47,11 +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.  |
@@ -60,10 +77,11 @@ uniqstr_new (char const *str)
 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));
+             "not a uniqstr: %s", quotearg (str));
       abort ();
     }
 }
@@ -86,7 +104,17 @@ uniqstr_print_processor (void *ustr, void *null ATTRIBUTE_UNUSED)
   return uniqstr_print (ustr);
 }
 
-\f
+
+int
+uniqstr_cmp (uniqstr l, uniqstr r)
+{
+  return (l == r ? 0
+          : !l ? -1
+          : !r ? +1
+          : strcmp (l, r));
+}
+
+
 /*-----------------------.
 | A uniqstr hash table.  |
 `-----------------------*/
@@ -94,7 +122,7 @@ uniqstr_print_processor (void *ustr, void *null ATTRIBUTE_UNUSED)
 static bool
 hash_compare_uniqstr (void const *m1, void const *m2)
 {
-  return strcmp (m1, m2) == 0;
+  return STREQ (m1, m2);
 }
 
 static size_t
@@ -103,6 +131,7 @@ hash_uniqstr (void const *m, size_t tablesize)
   return hash_string (m, tablesize);
 }
 
+
 /*----------------------------.
 | Create the uniqstrs table.  |
 `----------------------------*/
@@ -111,10 +140,10 @@ void
 uniqstrs_new (void)
 {
   uniqstrs_table = hash_initialize (HT_INITIAL_CAPACITY,
-                                   NULL,
-                                   hash_uniqstr,
-                                   hash_compare_uniqstr,
-                                   free);
+                                    NULL,
+                                    hash_uniqstr,
+                                    hash_compare_uniqstr,
+                                    free);
 }