mpq.pm

GMP是计算任意精度的数学库, 包括支持整数,有理数和浮点. GMP包括大量的接口函数.

# GMP mpq module.

# Copyright 2001 Free Software Foundation, Inc.
#
# This file is part of the GNU MP Library.
#
# The GNU MP Library is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation; either version 3 of the License, or (at
# your option) any later version.
#
# The GNU MP Library is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
# License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.


package GMP::Mpq;

require GMP;
require Exporter;
@ISA = qw(GMP Exporter);
@EXPORT = qw();
@EXPORT_OK = qw();
%EXPORT_TAGS = ('all' => [qw(canonicalize den inv mpq num)],
		'constants'   => [@EXPORT],
		'noconstants' => [@EXPORT] );
Exporter::export_ok_tags('all');

use overload
    '+'   => \&overload_add,     '+='  => \&overload_addeq,
    '-'   => \&overload_sub,     '-='  => \&overload_subeq,
    '*'   => \&overload_mul,     '*='  => \&overload_muleq,
    '/'   => \&overload_div,     '/='  => \&overload_diveq,
    '**'  => \&overload_pow,     '**=' => \&overload_poweq,
    '<<'  => \&overload_lshift,  '<<=' => \&overload_lshifteq,
    '>>'  => \&overload_rshift,  '>>=' => \&overload_rshifteq,

    'bool' => \&overload_bool,
    'not'  => \&overload_not,
    '!'    => \&overload_not,
    '=='   => \&overload_eq,
    '!='   => \&overload_ne,
    '<=>'  => \&overload_spaceship,
    '++'   => \&overload_inc,
    '--'   => \&overload_dec,
    'abs'  => \&overload_abs,
    'neg'  => \&overload_neg,
    '='    => \&overload_copy,
    '""'   => \&overload_string;

my $constants = { };

sub import {
  foreach (@_) {
    if ($_ eq ':constants') {
      overload::constant ('integer' => \&overload_constant,
			  'binary'  => \&overload_constant,
			  'float'   => \&overload_constant);
    } elsif ($_ eq ':noconstants') {
      overload::remove_constant ('integer' => \&overload_constant,
				 'binary'  => \&overload_constant,
				 'float'   => \&overload_constant);
    }
  }
  goto &Exporter::import;
}

1;
__END__


# Local variables:
# perl-indent-level: 2
# End: