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-.\"	$OpenBSD: ohash_interval.3,v 1.11 2007/05/31 19:19:30 jmc Exp $
-.\" Copyright (c) 2001 Marc Espie <espie@openbsd.org>
-.\"
-.\" Permission to use, copy, modify, and distribute this software for any
-.\" purpose with or without fee is hereby granted, provided that the above
-.\" copyright notice and this permission notice appear in all copies.
-.\"
-.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
-.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
-.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
-.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
-.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
-.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
-.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-.\"
-.Dd $Mdocdate: May 31 2007 $
-.Dt OPEN_HASH_HELPER 3
-.Os
-.Sh NAME
-.Nm ohash_interval ,
-.Nm ohash_create_entry ,
-.Nm ohash_qlookup ,
-.Nm ohash_qlookupi
-.Nd helper functions for open hashing
-.Sh SYNOPSIS
-.Fd #include <stdint.h>
-.Fd #include <stddef.h>
-.Fd #include <ohash.h>
-.Ft u_int32_t
-.Fn ohash_interval "const char *start" "const char **pend"
-.Ft "void *"
-.Fn ohash_create_entry "struct ohash_info *info" "const char *start" "const char **pend"
-.Ft "unsigned int"
-.Fn ohash_qlookupi "struct ohash *h" "const char *start" "const char **pend"
-.Ft "unsigned int"
-.Fn ohash_qlookup "struct ohash *h" "const char *start"
-.Sh DESCRIPTION
-These functions are commonly used to simplify open hashing usage, and use
-similar conventions.
-They operate indifferently on NUL-terminated strings
-.Po
-by setting
-.Fa *pend
-=
-.Dv NULL
-.Pc
-or memory ranges
-.Po
-delimited by
-.Fa start
-and
-.Fa *pend
-.Pc .
-For NUL-terminated strings, as a side effect, those functions
-set
-.Fa *pend
-to the terminating NUL byte.
-.Pp
-.Fn ohash_interval
-is a simple hashing function that yields good results on common data sets.
-.Pp
-.Fn ohash_create_entry
-can be used to create a new record with a given key.
-In that case,
-the alloc field of
-.Fa info
-should point to a
-.Xr malloc 3 Ns -like
-function to allocate the storage.
-.Pp
-.Fn ohash_qlookupi
-is a wrapper function that simply calls
-.Fn ohash_interval
-and
-.Fn ohash_lookup_interval .
-.Pp
-.Fn ohash_qlookup
-is a variation on
-.Fn ohash_qlookupi
-designed for NUL-terminated strings.
-.Sh SEE ALSO
-.Xr ohash_init 3
-.Sh STANDARDS
-Those functions are completely non-standard and should be avoided in
-portable programs.
-.Sh HISTORY
-Those functions were designed and written for
-.Ox
-.Xr make 1
-by Marc Espie in 1999.