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/* hash.h: declarations for a hash table.
Copyright (C) 1994, 95 Karl Berry.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifndef HASH_H
#define HASH_H
#include <kpathsea/c-proto.h>
#include <kpathsea/types.h>
/* A single (key,value) pair. */
typedef struct hash_element_struct
{
const_string key;
const_string value;
struct hash_element_struct *next;
} hash_element_type;
/* The usual arrangement of buckets initialized to null. */
typedef struct
{
hash_element_type **buckets;
unsigned size;
} hash_table_type;
#ifdef KPSE_DEBUG
/* How to print the hash results when debugging. */
extern boolean kpse_debug_hash_lookup_int;
#endif
/* Create a hash table of size SIZE. */
extern hash_table_type hash_create P1H(unsigned size);
/* Insert the (KEY,VALUE) association into TABLE. KEY may have more
than one VALUE. Neither KEY nor VALUE is copied. */
extern void hash_insert P3H(hash_table_type *table, const_string key,
const_string value);
/* Look up KEY in MAP, and return NULL-terminated list of all matching
values (not copies), in insertion order. If none, return NULL. */
extern string *hash_lookup P2H(hash_table_type table, const_string key);
/* Print TABLE to stderr. */
extern void hash_print P2H(hash_table_type table, boolean summary_only);
#endif /* not HASH_H */
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