| hash.9 (156710) | hash.9 (162877) |
|---|---|
| 1.\" Copyright (c) 2001 Tobias Weingartner 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 10 unchanged lines hidden (view full) --- 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.\" $OpenBSD: hash.9,v 1.5 2003/04/17 05:08:39 jmc Exp $ | 1.\" Copyright (c) 2001 Tobias Weingartner 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 10 unchanged lines hidden (view full) --- 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.\" $OpenBSD: hash.9,v 1.5 2003/04/17 05:08:39 jmc Exp $ |
| 27.\" $FreeBSD: head/share/man/man9/hash.9 156710 2006-03-14 17:19:09Z andre $ | 27.\" $FreeBSD: head/share/man/man9/hash.9 162877 2006-09-30 17:09:59Z ru $ |
| 28.\" 29.Dd December 8, 2001 30.Dt HASH 9 31.Os 32.Sh NAME | 28.\" 29.Dd December 8, 2001 30.Dt HASH 9 31.Os 32.Sh NAME |
| 33.Nm hash 34.\" XXX - Should all these be .Nm as well? 35.\" .Nm hash32 , 36.\" .Nm hash32_buf , 37.\" .Nm hash32_str , 38.\" .Nm hash32_strn , 39.\" .Nm hash32_stre , 40.\" .Nm hash32_strne | 33.Nm hash , 34.Nm hash32 , 35.Nm hash32_buf , 36.Nm hash32_str , 37.Nm hash32_strn , 38.Nm hash32_stre , 39.Nm hash32_strne |
| 41.Nd general kernel hashing functions 42.Sh SYNOPSIS | 40.Nd general kernel hashing functions 41.Sh SYNOPSIS |
| 43.Fd #include <sys/hash.h> | 42.In sys/hash.h |
| 44.Ft uint32_t 45.Fn hash32_buf "void *buf" "size_t len" "uint32_t hash" 46.Ft uint32_t 47.Fn hash32_str "void *buf" "uint32_t hash" 48.Ft uint32_t 49.Fn hash32_strn "void *buf" "size_t len" "uint32_t hash" 50.Ft uint32_t 51.Fn hash32_stre "void *buf" "int end" "char **ep" "uint32_t hash" 52.Ft uint32_t 53.Fn hash32_strne "void *buf" "size_t len" "int end" "char **ep" "uint32_t hash" 54.Sh DESCRIPTION 55The 56.Fn hash32 57functions are used to give a consistent and general interface to 58a decent hashing algorithm within the kernel. | 43.Ft uint32_t 44.Fn hash32_buf "void *buf" "size_t len" "uint32_t hash" 45.Ft uint32_t 46.Fn hash32_str "void *buf" "uint32_t hash" 47.Ft uint32_t 48.Fn hash32_strn "void *buf" "size_t len" "uint32_t hash" 49.Ft uint32_t 50.Fn hash32_stre "void *buf" "int end" "char **ep" "uint32_t hash" 51.Ft uint32_t 52.Fn hash32_strne "void *buf" "size_t len" "int end" "char **ep" "uint32_t hash" 53.Sh DESCRIPTION 54The 55.Fn hash32 56functions are used to give a consistent and general interface to 57a decent hashing algorithm within the kernel. |
| 59These functions can be used to hash ASCII | 58These functions can be used to hash 59.Tn ASCII |
| 60.Dv NUL 61terminated strings, as well as blocks of memory. 62.Pp 63The 64.Fn hash32_buf 65function is used as a general buffer hashing function. 66The argument 67.Fa buf --- 46 unchanged lines hidden (view full) --- 114.Sh EXAMPLES 115.Bd -literal -offset indent 116LIST_HEAD(head, cache) *hashtbl = NULL; 117u_long mask = 0; 118 119void 120sample_init(void) 121{ | 60.Dv NUL 61terminated strings, as well as blocks of memory. 62.Pp 63The 64.Fn hash32_buf 65function is used as a general buffer hashing function. 66The argument 67.Fa buf --- 46 unchanged lines hidden (view full) --- 114.Sh EXAMPLES 115.Bd -literal -offset indent 116LIST_HEAD(head, cache) *hashtbl = NULL; 117u_long mask = 0; 118 119void 120sample_init(void) 121{ |
| 122 |
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| 122 hashtbl = hashinit(numwanted, type, flags, &mask); 123} 124 125void 126sample_use(char *str, int len) 127{ 128 uint32_t hash; 129 --- 31 unchanged lines hidden --- | 123 hashtbl = hashinit(numwanted, type, flags, &mask); 124} 125 126void 127sample_use(char *str, int len) 128{ 129 uint32_t hash; 130 --- 31 unchanged lines hidden --- |