initial import from bash_3.1dfsg.orig.tar.gz

1 files changed, 92 insertions, 0 deletions

diff --git a/hashlib.h b/hashlib.h
new file mode 100644
index 0000000..bb7120b
--- /dev/null
+++ b/hashlib.h
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+/* hashlib.h -- the data structures used in hashing in Bash. */
+
+/* Copyright (C) 1993 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 2, 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; see the file COPYING.  If not, write to the Free Software
+   Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
+
+#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 */