2013-12-06 12:04:52 +01:00
|
|
|
.\" $NetBSD: elf_hash.3,v 1.1.1.1 2009/12/19 05:43:39 thorpej Exp $
|
|
|
|
|
.\"
|
|
|
|
|
.\" Copyright (c) 2006 Joseph Koshy. All rights reserved.
|
2011-05-21 19:11:59 +02:00
|
|
|
.\"
|
|
|
|
|
.\" 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 Joseph Koshy ``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 Joseph Koshy 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.
|
|
|
|
|
.\"
|
2013-12-06 12:04:52 +01:00
|
|
|
.\" $FreeBSD: src/lib/libelf/elf_hash.3,v 1.2.10.1.2.1 2009/10/25 01:10:29 kensmith Exp $
|
2011-05-21 19:11:59 +02:00
|
|
|
.\"
|
|
|
|
|
.Dd August 15, 2006
|
|
|
|
|
.Os
|
|
|
|
|
.Dt ELF_HASH 3
|
|
|
|
|
.Sh NAME
|
|
|
|
|
.Nm elf_hash
|
|
|
|
|
.Nd compute a hash value for a string
|
|
|
|
|
.Sh LIBRARY
|
|
|
|
|
.Lb libelf
|
|
|
|
|
.Sh SYNOPSIS
|
|
|
|
|
.In libelf.h
|
|
|
|
|
.Ft "unsigned long"
|
|
|
|
|
.Fn elf_hash "const char *name"
|
|
|
|
|
.Sh DESCRIPTION
|
|
|
|
|
Function
|
|
|
|
|
.Fn elf_hash
|
|
|
|
|
computes a portable hash value for the null terminated string
|
|
|
|
|
pointed to by argument
|
|
|
|
|
.Ar name .
|
|
|
|
|
.Pp
|
|
|
|
|
The hash value returned is will be identical across
|
|
|
|
|
machines of different architectures.
|
|
|
|
|
This allows hash tables to be built on one machine and
|
|
|
|
|
correctly used on another of a different architecture.
|
|
|
|
|
The hash value returned is also guaranteed
|
|
|
|
|
.Em not
|
|
|
|
|
to be the bit pattern of all ones (~0UL).
|
|
|
|
|
.Sh IMPLEMENTATION NOTES
|
|
|
|
|
The library internally uses unsigned 32 bit arithmetic to compute
|
|
|
|
|
the hash value.
|
|
|
|
|
.Sh SEE ALSO
|
|
|
|
|
.Xr elf 3 ,
|
|
|
|
|
.Xr gelf 3
|
