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bison/src/bison/2.4.1/bison-2.4.1-src/lib/hash.h

Index: bison/src/bison/2.4.1/bison-2.4.1-src/lib/hash.h
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--- bison/src/bison/2.4.1/bison-2.4.1-src/lib/hash.h	(revision 0)
+++ bison/src/bison/2.4.1/bison-2.4.1-src/lib/hash.h	(revision 0)
@@ -0,0 +1,87 @@
+/* hash - hashing table processing.
+   Copyright (C) 1998, 1999, 2001, 2003 Free Software Foundation, Inc.
+   Written by Jim Meyering <meyering@ascend.com>, 1998.
+
+   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 3 of the License, or
+   (at your option) any later version.
+
+   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 this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* A generic hash table package.  */
+
+/* Make sure USE_OBSTACK is defined to 1 if you want the allocator to use
+   obstacks instead of malloc, and recompile `hash.c' with same setting.  */
+
+#ifndef HASH_H_
+# define HASH_H_
+
+# include <stdio.h>
+# include <stdbool.h>
+
+typedef size_t (*Hash_hasher) (const void *, size_t);
+typedef bool (*Hash_comparator) (const void *, const void *);
+typedef void (*Hash_data_freer) (void *);
+typedef bool (*Hash_processor) (void *, void *);
+
+struct hash_entry
+  {
+    void *data;
+    struct hash_entry *next;
+  };
+
+struct hash_tuning
+  {
+    /* This structure is mainly used for `hash_initialize', see the block
+       documentation of `hash_reset_tuning' for more complete comments.  */
+
+    float shrink_threshold;	/* ratio of used buckets to trigger a shrink */
+    float shrink_factor;	/* ratio of new smaller size to original size */
+    float growth_threshold;	/* ratio of used buckets to trigger a growth */
+    float growth_factor;	/* ratio of new bigger size to original size */
+    bool is_n_buckets;		/* if CANDIDATE really means table size */
+  };
+
+typedef struct hash_tuning Hash_tuning;
+
+struct hash_table;
+
+typedef struct hash_table Hash_table;
+
+/* Information and lookup.  */
+size_t hash_get_n_buckets (const Hash_table *);
+size_t hash_get_n_buckets_used (const Hash_table *);
+size_t hash_get_n_entries (const Hash_table *);
+size_t hash_get_max_bucket_length (const Hash_table *);
+bool hash_table_ok (const Hash_table *);
+void hash_print_statistics (const Hash_table *, FILE *);
+void *hash_lookup (const Hash_table *, const void *);
+
+/* Walking.  */
+void *hash_get_first (const Hash_table *);
+void *hash_get_next (const Hash_table *, const void *);
+size_t hash_get_entries (const Hash_table *, void **, size_t);
+size_t hash_do_for_each (const Hash_table *, Hash_processor, void *);
+
+/* Allocation and clean-up.  */
+size_t hash_string (const char *, size_t);
+void hash_reset_tuning (Hash_tuning *);
+Hash_table *hash_initialize (size_t, const Hash_tuning *,
+			     Hash_hasher, Hash_comparator,
+			     Hash_data_freer);
+void hash_clear (Hash_table *);
+void hash_free (Hash_table *);
+
+/* Insertion and deletion.  */
+bool hash_rehash (Hash_table *, size_t);
+void *hash_insert (Hash_table *, const void *);
+void *hash_delete (Hash_table *, const void *);
+
+#endif
Property changes on: bison\src\bison\2.4.1\bison-2.4.1-src\lib\hash.h
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Added: svn:eol-style
   + LF