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Annotation of OpenXM_contrib/gmp/demos/perl/GMP/Mpf.pm, Revision 1.1.1.1

1.1       ohara       1: # GMP mpf module.
                      2:
                      3: # Copyright 2001 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 2.1 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; see the file COPYING.LIB.  If not, write to
                     19: # the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     20: # MA 02111-1307, USA.
                     21:
                     22:
                     23: package GMP::Mpf;
                     24:
                     25: require GMP;
                     26: require Exporter;
                     27: @ISA = qw(GMP Exporter);
                     28: @EXPORT = qw();
                     29: @EXPORT_OK = qw();
                     30: %EXPORT_TAGS = ('all' => [qw(
                     31:                             ceil floor get_default_prec get_prec mpf mpf_eq
                     32:                             reldiff set_default_prec set_prec trunc)],
                     33:                'constants'   => [@EXPORT],
                     34:                'noconstants' => [@EXPORT]);
                     35: Exporter::export_ok_tags('all');
                     36:
                     37: use overload
                     38:     '+'   => \&overload_add,     '+='  => \&overload_addeq,
                     39:     '-'   => \&overload_sub,     '-='  => \&overload_subeq,
                     40:     '*'   => \&overload_mul,     '*='  => \&overload_muleq,
                     41:     '/'   => \&overload_div,     '/='  => \&overload_diveq,
                     42:     '**'  => \&overload_pow,     '**=' => \&overload_poweq,
                     43:     '<<'  => \&overload_lshift,  '<<=' => \&overload_lshifteq,
                     44:     '>>'  => \&overload_rshift,  '>>=' => \&overload_rshifteq,
                     45:
                     46:     'bool' => \&overload_bool,
                     47:     'not'  => \&overload_not,
                     48:     '!'    => \&overload_not,
                     49:     '<=>'  => \&overload_spaceship,
                     50:     '++'   => \&overload_inc,
                     51:     '--'   => \&overload_dec,
                     52:     'abs'  => \&overload_abs,
                     53:     'neg'  => \&overload_neg,
                     54:     'sqrt' => \&overload_sqrt,
                     55:     '='    => \&overload_copy,
                     56:     '""'   => \&overload_string;
                     57:
                     58: sub import {
                     59:   foreach (@_) {
                     60:     if ($_ eq ':constants') {
                     61:       overload::constant ('integer' => \&overload_constant,
                     62:                          'binary'  => \&overload_constant,
                     63:                          'float'   => \&overload_constant);
                     64:     } elsif ($_ eq ':noconstants') {
                     65:       overload::remove_constant ('integer' => \&overload_constant,
                     66:                                 'binary'  => \&overload_constant,
                     67:                                 'float'   => \&overload_constant);
                     68:     }
                     69:   }
                     70:   goto &Exporter::import;
                     71: }
                     72:
                     73:
                     74: sub overload_string {
                     75:   my $fmt;
                     76:   {
                     77:     # don't whinge about $# being deprecated
                     78:     local $^W = 0;
                     79:     $fmt = $#;
                     80:   }
                     81:   if (! defined $fmt) {
                     82:     $fmt = '%.Fg';
                     83:   } else {
                     84:     # protect against calling sprintf_internal with a bad format
                     85:     if ($# !~ /^(%%|[^%])*%[-+ .\d]*[eEfgG](%%|[^%])*$/) {
                     86:       die "GMP::Mpf: invalid \$# format: $#\n";
                     87:     }
                     88:     $fmt = $OFMT;
                     89:     $fmt =~ s/(.)$/F$1/;
                     90:   }
                     91:   GMP::sprintf_internal ($fmt, $_[0]);
                     92: }
                     93:
                     94: 1;
                     95: __END__
                     96:
                     97:
                     98: # Local variables:
                     99: # perl-indent-level: 2
                    100: # End: