Mpf.pm revision 1.1.1.1 
1# GMP mpf module.
2
3# Copyright 2001, 2003 Free Software Foundation, Inc.
4#
5# This file is part of the GNU MP Library.
6#
7# The GNU MP Library is free software; you can redistribute it and/or modify
8# it under the terms of the GNU Lesser General Public License as published
9# by the Free Software Foundation; either version 3 of the License, or (at
10# your option) any later version.
11#
12# The GNU MP Library is distributed in the hope that it will be useful, but
13# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
15# License for more details.
16#
17# You should have received a copy of the GNU Lesser General Public License
18# along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.
19
20
21package GMP::Mpf;
22
23require GMP;
24require Exporter;
25@ISA = qw(GMP Exporter);
26@EXPORT = qw();
27@EXPORT_OK = qw();
28%EXPORT_TAGS = ('all' => [qw(
29			     ceil floor get_default_prec get_prec mpf mpf_eq
30			     reldiff set_default_prec set_prec trunc)],
31		'constants'   => [@EXPORT],
32		'noconstants' => [@EXPORT]);
33Exporter::export_ok_tags('all');
34
35use overload
36    '+'   => \&overload_add,     '+='  => \&overload_addeq,
37    '-'   => \&overload_sub,     '-='  => \&overload_subeq,
38    '*'   => \&overload_mul,     '*='  => \&overload_muleq,
39    '/'   => \&overload_div,     '/='  => \&overload_diveq,
40    '**'  => \&overload_pow,     '**=' => \&overload_poweq,
41    '<<'  => \&overload_lshift,  '<<=' => \&overload_lshifteq,
42    '>>'  => \&overload_rshift,  '>>=' => \&overload_rshifteq,
43
44    'bool' => \&overload_bool,
45    'not'  => \&overload_not,
46    '!'    => \&overload_not,
47    '<=>'  => \&overload_spaceship,
48    '++'   => \&overload_inc,
49    '--'   => \&overload_dec,
50    'abs'  => \&overload_abs,
51    'neg'  => \&overload_neg,
52    'sqrt' => \&overload_sqrt,
53    '='    => \&overload_copy,
54    '""'   => \&overload_string;
55
56sub import {
57  foreach (@_) {
58    if ($_ eq ':constants') {
59      overload::constant ('integer' => \&overload_constant,
60			  'binary'  => \&overload_constant,
61			  'float'   => \&overload_constant);
62    } elsif ($_ eq ':noconstants') {
63      overload::remove_constant ('integer' => \&overload_constant,
64				 'binary'  => \&overload_constant,
65				 'float'   => \&overload_constant);
66    }
67  }
68  goto &Exporter::import;
69}
70
71
72sub overload_string {
73  my $fmt;
74  BEGIN { $^W = 0; }
75  if (defined ($#)) {
76    $fmt = $#;
77    BEGIN { $^W = 1; }
78    # protect against calling sprintf_internal with a bad format
79    if ($fmt !~ /^((%%|[^%])*%[-+ .\d]*)([eEfgG](%%|[^%])*)$/) {
80      die "GMP::Mpf: invalid \$# format: $#\n";
81    }
82    $fmt = $1 . 'F' . $3;
83  } else {
84    $fmt = '%.Fg';
85  }
86  GMP::sprintf_internal ($fmt, $_[0]);
87}
88
891;
90__END__
91
92
93# Local variables:
94# perl-indent-level: 2
95# End:
96