/*
** Character Hash Functions
**
** Copyright (C) 1996-2005 Herbert Poetzl
*/

#ifndef _CHASH_H_
#define _CHASH_H_

struct 	hash_entry {
	long	hashcode;
	char  	*key;
	void 	*value;
	};	

struct 	hash_control {
	int 	sizelog;
	long	mask;
	long	entries;
	long 	memsize;
	struct 	hash_entry *data;
	struct 	hash_entry *wall;
	};


typedef	struct hash_control *hash;

struct	hash_state {
	hash	table;
	long	hashpos;
	struct	{
		unsigned int active:1;
		} sflags;
	};

typedef	struct hash_state   hstate;


hash	hash_new(long capacity);
void	hash_free(hash table);
void	hash_free_keys(hash table);
void	hash_empty(hash table);
int	hash_insert(hash table, const char *key, void *value, char copy);
int	hash_inject(hash table, const char *key, void *value);
void *	hash_replace(hash table, const char *key, void *value);
void *	hash_delete(hash table, const char *key, const char **oldkey);
void *	hash_lookup(hash table, const char *key);

hstate	hash_state(hash table);
void *	hash_next(hstate *state, char **key);
int	hash_count(hash table);

char *	_copy_string(const char *string);

#endif 	/* _CHASH_H_ */