Math::BigInt::Scalar is only for tests.

Move it under t/lib.

p4raw-id: //depot/perl@21859

1 files changed, 242 insertions, 0 deletions

diff --git a/t/lib/Math/BigInt/Scalar.pm b/t/lib/Math/BigInt/Scalar.pm
new file mode 100644
index 0000000000..44bab5d53f
--- /dev/null
+++ b/t/lib/Math/BigInt/Scalar.pm
@@ -0,0 +1,242 @@
+###############################################################################
+# core math lib for BigInt, representing big numbers by normal int/float's
+# for testing only, will fail any bignum test if range is exceeded
+
+package Math::BigInt::Scalar;
+
+use 5.005;
+use strict;
+# use warnings; # dont use warnings for older Perls
+
+require Exporter;
+
+use vars qw/@ISA $VERSION/;
+@ISA = qw(Exporter);
+
+$VERSION = '0.11';
+
+##############################################################################
+# global constants, flags and accessory
+ 
+# constants for easier life
+my $nan = 'NaN';
+
+##############################################################################
+# create objects from various representations
+
+sub _new
+  {
+  # (string) return ref to num
+  my $d = $_[1];
+  my $x = $$d;	# make copy
+  return \$x;
+  }                                                                             
+
+sub _zero
+  {
+  my $x = 0; return \$x;
+  }
+
+sub _one
+  {
+  my $x = 1; return \$x;
+  }
+
+sub _copy
+  {
+  my $x = $_[1];
+  my $z = $$x;
+  return \$z;
+  }
+
+# catch and throw away
+sub import { }
+
+##############################################################################
+# convert back to string and number
+
+sub _str
+  {
+  # make string
+  return \"${$_[1]}";
+  }                                                                             
+
+sub _num
+  {
+  # make a number
+  return ${$_[1]};
+  }
+
+
+##############################################################################
+# actual math code
+
+sub _add
+  {
+  my ($c,$x,$y) = @_;
+  $$x += $$y;
+  return $x;
+  }                                                                             
+
+sub _sub
+  {
+  my ($c,$x,$y) = @_;
+  $$x -= $$y;
+  return $x;
+  }                                                                             
+
+sub _mul
+  {
+  my ($c,$x,$y) = @_;
+  $$x *= $$y;
+  return $x;
+  }                                                                             
+
+sub _div
+  {
+  my ($c,$x,$y) = @_;
+
+  my $u = int($$x / $$y); my $r = $$x % $$y; $$x = $u;
+  return ($x,\$r) if wantarray;
+  return $x;
+  }                                                                             
+
+sub _pow
+  {
+  my ($c,$x,$y) = @_;
+  my $u = $$x ** $$y; $$x = $u;
+  return $x;
+  }
+
+sub _and
+  {
+  my ($c,$x,$y) = @_;
+  my $u = int($$x) & int($$y); $$x = $u;
+  return $x;
+  }
+
+sub _xor
+  {
+  my ($c,$x,$y) = @_;
+  my $u = int($$x) ^ int($$y); $$x = $u;
+  return $x;
+  }
+
+sub _or
+  {
+  my ($c,$x,$y) = @_;
+  my $u = int($$x) | int($$y); $$x = $u;
+  return $x;
+  }
+
+sub _inc
+  {
+  my ($c,$x) = @_;
+  my $u = int($$x)+1; $$x = $u;
+  return $x;
+  }
+
+sub _dec
+  {
+  my ($c,$x) = @_;
+  my $u = int($$x)-1; $$x = $u;
+  return $x;
+  }
+
+##############################################################################
+# testing
+
+sub _acmp
+  {
+  my ($c,$x, $y) = @_;
+  return ($$x <=> $$y);
+  }
+
+sub _len
+  {
+  return length("${$_[1]}");
+  }
+
+sub _digit
+  {
+  # return the nth digit, negative values count backward
+  # 0 is the rightmost digit
+  my ($c,$x,$n) = @_;
+  
+  $n ++;			# 0 => 1, 1 => 2
+  return substr($$x,-$n,1);	# 1 => -1, -2 => 2 etc
+  }
+
+##############################################################################
+# _is_* routines
+
+sub _is_zero
+  {
+  # return true if arg is zero
+  my ($c,$x) = @_;
+  return ($$x == 0) <=> 0;
+  }
+
+sub _is_even
+  {
+  # return true if arg is even
+  my ($c,$x) = @_;
+  return (!($$x & 1)) <=> 0; 
+  }
+
+sub _is_odd
+  {
+  # return true if arg is odd
+  my ($c,$x) = @_;
+  return ($$x & 1) <=> 0;
+  }
+
+sub _is_one
+  {
+  # return true if arg is one
+  my ($c,$x) = @_;
+  return ($$x == 1) <=> 0;
+  }
+
+###############################################################################
+# check routine to test internal state of corruptions
+
+sub _check
+  {
+  # no checks yet, pull it out from the test suite
+  my ($c,$x) = @_;
+  return "$x is not a reference" if !ref($x);
+  return 0;
+  }
+
+1;
+__END__
+
+=head1 NAME
+
+Math::BigInt::Scalar - Pure Perl module to test Math::BigInt with scalars
+
+=head1 SYNOPSIS
+
+Provides support for big integer calculations via means of 'small' int/floats.
+Only for testing purposes, since it will fail at large values. But it is simple
+enough not to introduce bugs on it's own and to serve as a testbed.
+
+=head1 DESCRIPTION
+
+Please see Math::BigInt::Calc.
+
+=head1 LICENSE
+ 
+This program is free software; you may redistribute it and/or modify it under
+the same terms as Perl itself. 
+
+=head1 AUTHOR
+
+Tels http://bloodgate.com in 2001.
+
+=head1 SEE ALSO
+
+L<Math::BigInt>, L<Math::BigInt::Calc>.
+
+=cut