From 772f20abb0a3a0979c440114bf3a1cff5b3cef03 Mon Sep 17 00:00:00 2001
From: cvpcs <root@cvpcs.org>
Date: Wed, 2 Jun 2010 11:02:31 -0500
Subject: initial import of bash 4.1

---
 hashlib.h | 92 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 hashlib.h

(limited to 'hashlib.h')

diff --git a/hashlib.h b/hashlib.h
new file mode 100644
index 0000000..4620e42
--- /dev/null
+++ b/hashlib.h
@@ -0,0 +1,92 @@
+/* hashlib.h -- the data structures used in hashing in Bash. */
+
+/* Copyright (C) 1993-2009 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash 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.
+
+   Bash 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 Bash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#if !defined (_HASHLIB_H_)
+#define _HASHLIB_H_
+
+#include "stdc.h"
+
+#ifndef PTR_T
+#  ifdef __STDC__
+#    define PTR_T void *
+#  else
+#    define PTR_T char *
+#  endif
+#endif
+
+typedef struct bucket_contents {
+  struct bucket_contents *next;	/* Link to next hashed key in this bucket. */
+  char *key;			/* What we look up. */
+  PTR_T data;			/* What we really want. */
+  unsigned int khash;		/* What key hashes to */
+  int times_found;		/* Number of times this item has been found. */
+} BUCKET_CONTENTS;
+
+typedef struct hash_table {
+  BUCKET_CONTENTS **bucket_array;	/* Where the data is kept. */
+  int nbuckets;			/* How many buckets does this table have. */
+  int nentries;			/* How many entries does this table have. */
+} HASH_TABLE;
+
+typedef int hash_wfunc __P((BUCKET_CONTENTS *));
+
+/* Operations on tables as a whole */
+extern HASH_TABLE *hash_create __P((int));
+extern HASH_TABLE *hash_copy __P((HASH_TABLE *, sh_string_func_t *));
+extern void hash_flush __P((HASH_TABLE *, sh_free_func_t *));
+extern void hash_dispose __P((HASH_TABLE *));
+extern void hash_walk __P((HASH_TABLE *, hash_wfunc *));
+
+/* Operations to extract information from or pieces of tables */
+extern int hash_bucket __P((const char *, HASH_TABLE *));
+extern int hash_size __P((HASH_TABLE *));
+
+/* Operations on hash table entries */
+extern BUCKET_CONTENTS *hash_search __P((const char *, HASH_TABLE *, int));
+extern BUCKET_CONTENTS *hash_insert __P((char *, HASH_TABLE *, int));
+extern BUCKET_CONTENTS *hash_remove __P((const char *, HASH_TABLE *, int));
+
+/* Miscellaneous */
+extern unsigned int hash_string __P((const char *));
+
+/* Redefine the function as a macro for speed. */
+#define hash_items(bucket, table) \
+	((table && (bucket < table->nbuckets)) ?  \
+		table->bucket_array[bucket] : \
+		(BUCKET_CONTENTS *)NULL)
+
+/* Default number of buckets in the hash table. */
+#define DEFAULT_HASH_BUCKETS 64	/* was 107, then 53, must be power of two now */
+
+#define HASH_ENTRIES(ht)	((ht) ? (ht)->nentries : 0)
+
+/* flags for hash_search and hash_insert */
+#define HASH_NOSRCH	0x01
+#define HASH_CREATE	0x02
+
+#if !defined (NULL)
+#  if defined (__STDC__)
+#    define NULL ((void *) 0)
+#  else
+#    define NULL 0x0
+#  endif /* !__STDC__ */
+#endif /* !NULL */
+
+#endif /* _HASHLIB_H */
-- 
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