File perl-Algorithm-Nhash.spec of Package perl-Algorithm-Nhash

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File perl-Algorithm-Nhash.spec of Package perl-Algorithm-Nhash

#
# spec file for package perl-Algorithm-Nhash
#
# Copyright (c) 2016 SUSE LINUX GmbH, Nuernberg, Germany.
#
# All modifications and additions to the file contributed by third parties
# remain the property of their copyright owners, unless otherwise agreed
# upon. The license for this file, and modifications and additions to the
# file, is the same license as for the pristine package itself (unless the
# license for the pristine package is not an Open Source License, in which
# case the license is the MIT License). An "Open Source License" is a
# license that conforms to the Open Source Definition (Version 1.9)
# published by the Open Source Initiative.

# Please submit bugfixes or comments via http://bugs.opensuse.org/
#

Name:           perl-Algorithm-Nhash
Version:        0.002
Release:        0
%define cpan_name Algorithm-Nhash
Summary:        Exim nhash algorithm
License:        Artistic-1.0 or GPL-1.0+
Group:          Development/Libraries/Perl
Url:            http://search.cpan.org/dist/Algorithm-Nhash/
Source0:        http://www.cpan.org/authors/id/M/MO/MOOLI/%{cpan_name}-%{version}.tar.gz
BuildArch:      noarch
BuildRoot:      %{_tmppath}/%{name}-%{version}-build
BuildRequires:  perl
BuildRequires:  perl-macros
%{perl_requires}

%description
This is an implementation of the Exim nhash algorithm. It also supports an
arbitrary number of divisors and not just the one or two that Exim permits.

The nash algorithm is a fast and simple hashing algorithm that attempts to
evenly-distribute values but does not attempt to avoid collisions. Thus, it
should not be used in place of a cryptographically-secure algorithm such as
Digest::SHA. It is mainly intended for hashing filenames into directories
to avoid placing too many files into a single directory.

If nhash is not given any divisors, then the hash result is returned as-is.
If one divisor is given, the hash result is given modulo that divisor. If
more than one divisor is given, the hash result is successively divided and
the modulo at each stage returned.

Since the result is typically a 20-30 bit number, the product of all the
divisors shouldn't be more than about 2**20 or the returned values will not
be evenly-distributed.

%prep
%setup -q -n %{cpan_name}-%{version}

%build
%{__perl} Makefile.PL INSTALLDIRS=vendor
%{__make} %{?_smp_mflags}

%check
%{__make} test

%install
%perl_make_install
%perl_process_packlist
%perl_gen_filelist

%files -f %{name}.files
%defattr(-,root,root,755)
%doc Changes LICENSE README

%changelog

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