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# hash.h: declarations for a hash table.
#
# Copyright (C) 1994, 1995, 2011 Free Software Foundation, Inc.
#
# 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/>.
#
#ifndef HASH_H
#define HASH_H
#include "c-proto.h"
#include "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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