$NetBSD: mi_vector_hash.3,v 1.2 2009/07/21 12:40:52 joerg Exp $
Copyright (c) 2009 The NetBSD Foundation, Inc.
All rights reserved.
This code is derived from software contributed to The NetBSD Foundation
by Joerg Sonnenberger.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.Dd July 13, 2009 .Dt MI_VECTOR_HASH 3 .Os .Sh NAME .Nm mi_vector_hash .Nd fast 32bit hash functions .Sh LIBRARY .Lb libc .Sh SYNOPSIS n stdlib.h .Ft void .Fn mi_vector_hash "const void * restrict key" "size_t len" \ "uint32_t seed" "uint32_t hashes[3]" .Sh DESCRIPTION The .Nm function computes three 32-bit hash values of the memory area starting at .Fa key with length .Fa len .
Copyright (c) 2009 The NetBSD Foundation, Inc.
All rights reserved.
This code is derived from software contributed to The NetBSD Foundation
by Joerg Sonnenberger.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
.Dd July 13, 2009 .Dt MI_VECTOR_HASH 3 .Os .Sh NAME .Nm mi_vector_hash .Nd fast 32bit hash functions .Sh LIBRARY .Lb libc .Sh SYNOPSIS n stdlib.h .Ft void .Fn mi_vector_hash "const void * restrict key" "size_t len" \ "uint32_t seed" "uint32_t hashes[3]" .Sh DESCRIPTION The .Nm function computes three 32-bit hash values of the memory area starting at .Fa key with length .Fa len .
p The output is identical on all architectures and only depends on .Fa key and .Fa seed . .Sh IMPLEMENTATION NOTES An optimised code path is used if .Fa key is aligned on a 32-bit boundary. .Sh HISTORY The .Nm function appeared in .Nx 6.0 . .Sh AUTHORS The hash function has been created by Bob Jenkins.