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HASH CONVENIENCES(3)	 BSD Library Functions Manual	  HASH CONVENIENCES(3)

NAME
     hash_compare_int, hash_compare_string, hash_hash_int, hash_hash_string,
     hash_copy_int, hash_copy_string --	libhash	convenience functions

LIBRARY
     Hash Library (libhash, -lhash)

SYNOPSIS
     #include <sys/types.h>
     #include <hash.h>

     int
     hash_compare_int(void *key1, void *key2);

     int
     hash_compare_string(void *key1, void *key2);

     u_int32_t
     hash_hash_int(void	*key, u_int32_t	number_of_buckets);

     u_int32_t
     hash_hash_string(void *key, u_int32_t number_of_buckets);

     int
     hash_copy_int(void	**destination, void *source);

     int
     hash_copy_string(void **destination, void *source);

DESCRIPTION
     These functions are provided by libhash as	a convenience for users. They
     are all designed to be passed to hash_initialise()	as one of the parame-
     ters.

     The functions hash_compare_int() and hash_compare_string()	are designed
     to	be passed to hash_initialise() as the compare_keys argument.
     hash_compare_int()	works with keys	that are integers and
     hash_compare_string() works with keys that	are nul	terminated char	arrays
     (strings).	 hash_compare_string() performs	a case sensistive lexicograph-
     ical comparison.

     The functions hash_hash_int() and hash_hash_string() are designed to be
     passed to hash_initialise() as the	hash_function argument.
     hash_hash_int() works with	keys that are integers and hash_hash_string()
     works with	keys that are nul terminated char arrays (strings).

     The functions hash_copy_int() and hash_copy_string() are designed to be
     passed to hash_initialise() as the	duplicate_key argument.
     hash_copy_int() works with	keys that are integers and hash_copy_string()
     works with	keys that are nul terminated char arrays (strings).

RETURN VALUES
     The hash_compare_int(), and hash_compare_string() functions return	a
     value less	than 0 if key1 is less than key2, a value equal	to 0 if	key1
     is	equal to key2 and a value greater than 0 if key1 is greater than key2.

     hash_hash_int() and hash_hash_string() return a number between 0 and
     number_of_buckets - 1.

     hash_copy_int() and hash_copy_string() return 0 on	failure	and set	the
     global variable errno to indicate the error.

EXAMPLES
     See the tests directory included in the distribution.

ERRORS
     [ENOMEM]
	     A call to malloc failed.

SEE ALSO
     libhash(3)

HISTORY
     The libhash library was written in	January	2002 for emmao (a program to
     kill off rogue processes under Solaris).  libhash was written under
     FreeBSD 4.4.

AUTHORS
     Andrew Stevenson <andrew@ugh.net.au>

BUGS
     hash_hash_string()	is a very simple algorithm and good be improved
     greatly.

     Please report others to <andrew@ugh.net.au>.

UgH!			       January 14, 2002				  UgH!
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | EXAMPLES | ERRORS | SEE ALSO | HISTORY | AUTHORS | BUGS

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