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#ifndef _HTABLE_H_INCLUDED_
#define _HTABLE_H_INCLUDED_

/*++
/* NAME
/*	htable 3h
/* SUMMARY
/*	hash table manager
/* SYNOPSIS
/*	#include <htable.h>
/* DESCRIPTION
/* .nf

 /* Structure of one hash table entry. */

typedef struct HTABLE_INFO {
    char   *key;			/* lookup key */
    char   *value;			/* associated value */
    struct HTABLE_INFO *next;		/* colliding entry */
    struct HTABLE_INFO *prev;		/* colliding entry */
} HTABLE_INFO;

 /* Structure of one hash table. */

typedef struct HTABLE {
    int     size;			/* length of entries array */
    int     used;			/* number of entries in table */
    HTABLE_INFO **data;			/* entries array, auto-resized */
    HTABLE_INFO **seq_bucket;		/* current sequence hash bucket */
    HTABLE_INFO **seq_element;		/* current sequence element */
} HTABLE;

extern HTABLE *htable_create(int);
extern HTABLE_INFO *htable_enter(HTABLE *, const char *, char *);
extern HTABLE_INFO *htable_locate(HTABLE *, const char *);
extern char *htable_find(HTABLE *, const char *);
extern void htable_delete(HTABLE *, const char *, void (*) (char *));
extern void htable_free(HTABLE *, void (*) (char *));
extern void htable_walk(HTABLE *, void (*) (HTABLE_INFO *, char *), char *);
extern HTABLE_INFO **htable_list(HTABLE *);
extern HTABLE_INFO *htable_sequence(HTABLE *, int);

#define HTABLE_SEQ_FIRST	0
#define HTABLE_SEQ_NEXT		1
#define HTABLE_SEQ_STOP		(-1)

/* LICENSE
/* .ad
/* .fi
/*	The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/*	Wietse Venema
/*	IBM T.J. Watson Research
/*	P.O. Box 704
/*	Yorktown Heights, NY 10598, USA
/* CREATION DATE
/*	Fri Feb 14 13:43:19 EST 1997
/* LAST MODIFICATION
/*	%E% %U%
/* VERSION/RELEASE
/*	%I%
/*--*/

#endif