blead is upstream for Math-BigInt-FastCalc

4 files changed, 608 insertions, 0 deletions

diff --git a/dist/Math-BigInt-FastCalc/t/bigintfc.t b/dist/Math-BigInt-FastCalc/t/bigintfc.t
new file mode 100644
index 0000000000..6bace5e04c
--- /dev/null
+++ b/dist/Math-BigInt-FastCalc/t/bigintfc.t
@@ -0,0 +1,439 @@
+#!/usr/bin/perl -w
+
+use strict;
+use Test;
+
+BEGIN 
+  {
+  $| = 1;
+  chdir 't' if -d 't' && !$ENV{PERL_CORE};
+  unshift @INC, '../lib';		# for running manually
+  unshift @INC, '../blib/arch';		# for running manually
+  plan tests => 359;
+  }
+
+use Math::BigInt::FastCalc;
+
+my ($BASE_LEN, $AND_BITS, $XOR_BITS, $OR_BITS, $BASE_LEN_SMALL, $MAX_VAL) =
+  Math::BigInt::FastCalc->_base_len();
+
+print "# BASE_LEN = $BASE_LEN\n";
+print "# MAX_VAL = $MAX_VAL\n";
+print "# AND_BITS = $AND_BITS\n";
+print "# XOR_BITS = $XOR_BITS\n";
+print "# IOR_BITS = $OR_BITS\n";
+
+# testing of Math::BigInt::FastCalc
+
+my $C = 'Math::BigInt::FastCalc';		# pass classname to sub's
+
+# _new and _str
+my $x = $C->_new("123"); my $y = $C->_new("321");
+ok (ref($x),'ARRAY'); ok ($C->_str($x),123); ok ($C->_str($y),321);
+
+###############################################################################
+# _add, _sub, _mul, _div
+ok ($C->_str($C->_add($x,$y)),444);
+ok ($C->_str($C->_sub($x,$y)),123);
+ok ($C->_str($C->_mul($x,$y)),39483);
+ok ($C->_str($C->_div($x,$y)),123);
+
+###############################################################################
+# check that mul/div doesn't change $y
+# and returns the same reference, not something new
+ok ($C->_str($C->_mul($x,$y)),39483);
+ok ($C->_str($x),39483); ok ($C->_str($y),321);
+
+ok ($C->_str($C->_div($x,$y)),123);
+ok ($C->_str($x),123); ok ($C->_str($y),321);
+
+$x = $C->_new("39483");
+my ($x1,$r1) = $C->_div($x,$y);
+ok ("$x1","$x");
+$C->_inc($x1);
+ok ("$x1","$x");
+ok ($C->_str($r1),'0');
+
+$x = $C->_new("39483");	# reset
+
+###############################################################################
+my $z = $C->_new("2");
+ok ($C->_str($C->_add($x,$z)),39485);
+my ($re,$rr) = $C->_div($x,$y);
+
+ok ($C->_str($re),123); ok ($C->_str($rr),2);
+
+# is_zero, _is_one, _one, _zero
+ok ($C->_is_zero($x)||0,0);
+ok ($C->_is_one($x)||0,0);
+
+ok ($C->_str($C->_zero()),"0");
+ok ($C->_str($C->_one()),"1");
+
+# _two() and _ten()
+ok ($C->_str($C->_two()),"2");
+ok ($C->_str($C->_ten()),"10");
+ok ($C->_is_ten($C->_two())||0,0);
+ok ($C->_is_two($C->_two()),1);
+ok ($C->_is_ten($C->_ten()),1);
+ok ($C->_is_two($C->_ten())||0,0);
+
+ok ($C->_is_one($C->_one()),1);
+ok ($C->_is_one($C->_two()) || 0,0);
+ok ($C->_is_one($C->_ten()) || 0,0);
+
+ok ($C->_is_one($C->_zero()) || 0,0);
+
+ok ($C->_is_zero($C->_zero()),1);
+
+ok ($C->_is_zero($C->_one()) || 0,0);
+
+# is_odd, is_even
+ok ($C->_is_odd($C->_one()),1); ok ($C->_is_odd($C->_zero())||0,0);
+ok ($C->_is_even($C->_one()) || 0,0); ok ($C->_is_even($C->_zero()),1);
+
+# _len
+for my $method (qw/_alen _len/)
+  {
+  $x = $C->_new("1"); ok ($C->$method($x),1);
+  $x = $C->_new("12"); ok ($C->$method($x),2);
+  $x = $C->_new("123"); ok ($C->$method($x),3);
+  $x = $C->_new("1234"); ok ($C->$method($x),4);
+  $x = $C->_new("12345"); ok ($C->$method($x),5);
+  $x = $C->_new("123456"); ok ($C->$method($x),6);
+  $x = $C->_new("1234567"); ok ($C->$method($x),7);
+  $x = $C->_new("12345678"); ok ($C->$method($x),8);
+  $x = $C->_new("123456789"); ok ($C->$method($x),9);
+
+  $x = $C->_new("8"); ok ($C->$method($x),1);
+  $x = $C->_new("21"); ok ($C->$method($x),2);
+  $x = $C->_new("321"); ok ($C->$method($x),3);
+  $x = $C->_new("4321"); ok ($C->$method($x),4);
+  $x = $C->_new("54321"); ok ($C->$method($x),5);
+  $x = $C->_new("654321"); ok ($C->$method($x),6);
+  $x = $C->_new("7654321"); ok ($C->$method($x),7);
+  $x = $C->_new("87654321"); ok ($C->$method($x),8);
+  $x = $C->_new("987654321"); ok ($C->$method($x),9);
+
+  $x = $C->_new("0"); ok ($C->$method($x),1);
+  $x = $C->_new("20"); ok ($C->$method($x),2);
+  $x = $C->_new("320"); ok ($C->$method($x),3);
+  $x = $C->_new("4320"); ok ($C->$method($x),4);
+  $x = $C->_new("54320"); ok ($C->$method($x),5);
+  $x = $C->_new("654320"); ok ($C->$method($x),6);
+  $x = $C->_new("7654320"); ok ($C->$method($x),7);
+  $x = $C->_new("87654320"); ok ($C->$method($x),8);
+  $x = $C->_new("987654320"); ok ($C->$method($x),9);
+
+  for (my $i = 1; $i < 9; $i++)
+    {
+    my $a = "$i" . '0' x ($i-1);
+    $x = $C->_new($a);
+    print "# Tried len '$a'\n" unless ok ($C->_len($x),$i);
+    }
+  }
+
+# _digit
+$x = $C->_new("123456789");
+ok ($C->_digit($x,0),9);
+ok ($C->_digit($x,1),8);
+ok ($C->_digit($x,2),7);
+ok ($C->_digit($x,-1),1);
+ok ($C->_digit($x,-2),2);
+ok ($C->_digit($x,-3),3);
+
+# _copy
+foreach (qw/ 1 12 123 1234 12345 123456 1234567 12345678 123456789/)
+  {
+  $x = $C->_new("$_");
+  ok ($C->_str($C->_copy($x)),"$_");
+  ok ($C->_str($x),"$_");		# did _copy destroy original x?
+  }
+
+# _zeros
+$x = $C->_new("1256000000"); ok ($C->_zeros($x),6);
+$x = $C->_new("152"); ok ($C->_zeros($x),0);
+$x = $C->_new("123000"); ok ($C->_zeros($x),3); 
+$x = $C->_new("0"); ok ($C->_zeros($x),0); 
+
+# _lsft, _rsft
+$x = $C->_new("10"); $y = $C->_new("3"); 
+ok ($C->_str($C->_lsft($x,$y,10)),10000);
+$x = $C->_new("20"); $y = $C->_new("3"); 
+ok ($C->_str($C->_lsft($x,$y,10)),20000);
+
+$x = $C->_new("128"); $y = $C->_new("4");
+ok ($C->_str($C->_lsft($x,$y,2)), 128 << 4);
+
+$x = $C->_new("1000"); $y = $C->_new("3"); 
+ok ($C->_str($C->_rsft($x,$y,10)),1);
+$x = $C->_new("20000"); $y = $C->_new("3"); 
+ok ($C->_str($C->_rsft($x,$y,10)),20);
+$x = $C->_new("256"); $y = $C->_new("4");
+ok ($C->_str($C->_rsft($x,$y,2)),256 >> 4);
+
+$x = $C->_new("6411906467305339182857313397200584952398");
+$y = $C->_new("45");
+ok ($C->_str($C->_rsft($x,$y,10)),0);
+
+# _acmp
+$x = $C->_new("123456789");
+$y = $C->_new("987654321");
+ok ($C->_acmp($x,$y),-1);
+ok ($C->_acmp($y,$x),1);
+ok ($C->_acmp($x,$x),0);
+ok ($C->_acmp($y,$y),0);
+$x = $C->_new("12");
+$y = $C->_new("12");
+ok ($C->_acmp($x,$y),0);
+$x = $C->_new("21");
+ok ($C->_acmp($x,$y),1);
+ok ($C->_acmp($y,$x),-1);
+$x = $C->_new("123456789");
+$y = $C->_new("1987654321");
+ok ($C->_acmp($x,$y),-1);
+ok ($C->_acmp($y,$x),+1);
+
+$x = $C->_new("1234567890123456789");
+$y = $C->_new("987654321012345678");
+ok ($C->_acmp($x,$y),1);
+ok ($C->_acmp($y,$x),-1);
+ok ($C->_acmp($x,$x),0);
+ok ($C->_acmp($y,$y),0);
+
+$x = $C->_new("1234");
+$y = $C->_new("987654321012345678");
+ok ($C->_acmp($x,$y),-1);
+ok ($C->_acmp($y,$x),1);
+ok ($C->_acmp($x,$x),0);
+ok ($C->_acmp($y,$y),0);
+
+# _modinv
+$x = $C->_new("8");
+$y = $C->_new("5033");
+my ($xmod,$sign) = $C->_modinv($x,$y);
+ok ($C->_str($xmod),'629');		# -629 % 5033 == 4404
+ok ($sign, '-');
+
+# _div
+$x = $C->_new("3333"); $y = $C->_new("1111");
+ok ($C->_str(scalar $C->_div($x,$y)),3);
+$x = $C->_new("33333"); $y = $C->_new("1111"); ($x,$y) = $C->_div($x,$y);
+ok ($C->_str($x),30); ok ($C->_str($y),3);
+$x = $C->_new("123"); $y = $C->_new("1111"); 
+($x,$y) = $C->_div($x,$y); ok ($C->_str($x),0); ok ($C->_str($y),123);
+
+# _num
+foreach (qw/1 12 123 1234 12345 1234567 12345678 123456789 1234567890/)
+  {
+  $x = $C->_new("$_"); 
+  ok (ref($x)||'','ARRAY'); ok ($C->_str($x),"$_");
+  $x = $C->_num($x); ok (ref($x)||'',''); ok ($x,$_);
+  }
+
+# _sqrt
+$x = $C->_new("144"); ok ($C->_str($C->_sqrt($x)),'12');
+$x = $C->_new("144000000000000"); ok ($C->_str($C->_sqrt($x)),'12000000');
+
+# _root
+$x = $C->_new("81"); my $n = $C->_new("3"); 	# 4*4*4 = 64, 5*5*5 = 125
+ok ($C->_str($C->_root($x,$n)),'4');	# 4.xx => 4.0
+$x = $C->_new("81"); $n = $C->_new("4"); 	# 3*3*3*3 == 81
+ok ($C->_str($C->_root($x,$n)),'3');
+
+# _pow (and _root)
+$x = $C->_new("0"); $n = $C->_new("3"); 	# 0 ** y => 0
+ok ($C->_str($C->_pow($x,$n)), 0);
+$x = $C->_new("3"); $n = $C->_new("0"); 	# x ** 0 => 1
+ok ($C->_str($C->_pow($x,$n)), 1);
+$x = $C->_new("1"); $n = $C->_new("3"); 	# 1 ** y => 1
+ok ($C->_str($C->_pow($x,$n)), 1);
+$x = $C->_new("5"); $n = $C->_new("1"); 	# x ** 1 => x
+ok ($C->_str($C->_pow($x,$n)), 5);
+
+$x = $C->_new("81"); $n = $C->_new("3"); 	# 81 ** 3 == 531441 
+ok ($C->_str($C->_pow($x,$n)),81 ** 3);
+
+ok ($C->_str($C->_root($x,$n)),81);
+
+$x = $C->_new("81");
+ok ($C->_str($C->_pow($x,$n)),81 ** 3);
+ok ($C->_str($C->_pow($x,$n)),'150094635296999121'); # 531441 ** 3 ==
+
+ok ($C->_str($C->_root($x,$n)),'531441');
+ok ($C->_str($C->_root($x,$n)),'81');
+
+$x = $C->_new("81"); $n = $C->_new("14"); 	
+ok ($C->_str($C->_pow($x,$n)),'523347633027360537213511521');
+ok ($C->_str($C->_root($x,$n)),'81');
+
+$x = $C->_new("523347633027360537213511520");
+ok ($C->_str($C->_root($x,$n)),'80');
+
+$x = $C->_new("523347633027360537213511522");
+ok ($C->_str($C->_root($x,$n)),'81');
+
+my $res = [ qw/ 9 31 99 316 999 3162 9999/ ];
+
+# 99 ** 2 = 9801, 999 ** 2 = 998001 etc
+for my $i (2 .. 9)
+  {
+  $x = '9' x $i; $x = $C->_new($x);
+  $n = $C->_new("2");
+  my $rc = '9' x ($i-1). '8' . '0' x ($i-1) . '1';
+  print "# _pow( ", '9' x $i, ", 2) \n" unless
+   ok ($C->_str($C->_pow($x,$n)),$rc);
+ 
+  if ($i <= 7)
+    {
+    $x = '9' x $i; $x = $C->_new($x);
+    $n = '9' x $i; $n = $C->_new($n);
+    print "# _root( ", '9' x $i, ", ", 9 x $i, ") \n" unless
+     ok ($C->_str($C->_root($x,$n)),'1');
+
+    $x = '9' x $i; $x = $C->_new($x);
+    $n = $C->_new("2");
+    print "# _root( ", '9' x $i, ", ", 9 x $i, ") \n" unless
+     ok ($C->_str($C->_root($x,$n)), $res->[$i-2]);
+    }
+  }
+
+##############################################################################
+# _fac
+$x = $C->_new("0"); ok ($C->_str($C->_fac($x)),'1');
+$x = $C->_new("1"); ok ($C->_str($C->_fac($x)),'1');
+$x = $C->_new("2"); ok ($C->_str($C->_fac($x)),'2');
+$x = $C->_new("3"); ok ($C->_str($C->_fac($x)),'6');
+$x = $C->_new("4"); ok ($C->_str($C->_fac($x)),'24');
+$x = $C->_new("5"); ok ($C->_str($C->_fac($x)),'120');
+$x = $C->_new("10"); ok ($C->_str($C->_fac($x)),'3628800');
+$x = $C->_new("11"); ok ($C->_str($C->_fac($x)),'39916800');
+$x = $C->_new("12"); ok ($C->_str($C->_fac($x)),'479001600');
+$x = $C->_new("13"); ok ($C->_str($C->_fac($x)),'6227020800');
+
+# test that _fac modifes $x in place for small arguments
+$x = $C->_new("3"); $C->_fac($x); ok ($C->_str($x),'6');
+$x = $C->_new("13"); $C->_fac($x); ok ($C->_str($x),'6227020800');
+
+##############################################################################
+# _inc and _dec
+foreach (qw/1 11 121 1231 12341 1234561 12345671 123456781 1234567891/)
+  {
+  $x = $C->_new("$_"); $C->_inc($x);
+  print "# \$x = ",$C->_str($x),"\n"
+   unless ok ($C->_str($x),substr($_,0,length($_)-1) . '2');
+  $C->_dec($x); ok ($C->_str($x),$_);
+  }
+foreach (qw/19 119 1219 12319 1234519 12345619 123456719 1234567819/)
+  {
+  $x = $C->_new("$_"); $C->_inc($x);
+  print "# \$x = ",$C->_str($x),"\n"
+   unless ok ($C->_str($x),substr($_,0,length($_)-2) . '20');
+  $C->_dec($x); ok ($C->_str($x),$_);
+  }
+foreach (qw/999 9999 99999 9999999 99999999 999999999 9999999999 99999999999/)
+  {
+  $x = $C->_new("$_"); $C->_inc($x);
+  print "# \$x = ",$C->_str($x),"\n"
+   unless ok ($C->_str($x), '1' . '0' x (length($_)));
+  $C->_dec($x); ok ($C->_str($x),$_);
+  }
+
+$x = $C->_new("1000"); $C->_inc($x); ok ($C->_str($x),'1001');
+$C->_dec($x); ok ($C->_str($x),'1000');
+
+my $BL;
+{
+  no strict 'refs';
+  $BL = &{"$C"."::_base_len"}();
+}
+
+$x = '1' . '0' x $BL;
+$z = '1' . '0' x ($BL-1); $z .= '1';
+$x = $C->_new($x); $C->_inc($x); ok ($C->_str($x),$z);
+
+$x = '1' . '0' x $BL; $z = '9' x $BL;
+$x = $C->_new($x); $C->_dec($x); ok ($C->_str($x),$z);
+
+# should not happen:
+# $x = $C->_new("-2"); $y = $C->_new("4"); ok ($C->_acmp($x,$y),-1);
+
+###############################################################################
+# _mod
+$x = $C->_new("1000"); $y = $C->_new("3");
+ok ($C->_str(scalar $C->_mod($x,$y)),1);
+$x = $C->_new("1000"); $y = $C->_new("2");
+ok ($C->_str(scalar $C->_mod($x,$y)),0);
+
+# _and, _or, _xor
+$x = $C->_new("5"); $y = $C->_new("2");
+ok ($C->_str(scalar $C->_xor($x,$y)),7);
+$x = $C->_new("5"); $y = $C->_new("2");
+ok ($C->_str(scalar $C->_or($x,$y)),7);
+$x = $C->_new("5"); $y = $C->_new("3");
+ok ($C->_str(scalar $C->_and($x,$y)),1);
+
+# _from_hex, _from_bin, _from_oct
+ok ($C->_str( $C->_from_hex("0xFf")),255);
+ok ($C->_str( $C->_from_bin("0b10101011")),160+11);
+ok ($C->_str( $C->_from_oct("0100")), 8*8);
+ok ($C->_str( $C->_from_oct("01000")), 8*8*8);
+ok ($C->_str( $C->_from_oct("010001")), 8*8*8*8+1);
+ok ($C->_str( $C->_from_oct("010007")), 8*8*8*8+7);
+
+# _as_hex, _as_bin, as_oct
+ok ($C->_str( $C->_from_hex( $C->_as_hex( $C->_new("128")))), 128);
+ok ($C->_str( $C->_from_bin( $C->_as_bin( $C->_new("128")))), 128);
+ok ($C->_str( $C->_from_oct( $C->_as_oct( $C->_new("128")))), 128);
+
+ok ($C->_str( $C->_from_oct( $C->_as_oct( $C->_new("123456")))), 123456);
+ok ($C->_str( $C->_from_oct( $C->_as_oct( $C->_new("123456789")))), "123456789");
+ok ($C->_str( $C->_from_oct( $C->_as_oct( $C->_new("1234567890123")))), "1234567890123");
+
+# _1ex
+ok ($C->_str($C->_1ex(0)), "1");
+ok ($C->_str($C->_1ex(1)), "10");
+ok ($C->_str($C->_1ex(2)), "100");
+ok ($C->_str($C->_1ex(12)), "1000000000000");
+ok ($C->_str($C->_1ex(16)), "10000000000000000");
+
+# _check
+$x = $C->_new("123456789");
+ok ($C->_check($x),0);
+ok ($C->_check(123),'123 is not a reference');
+
+###############################################################################
+# __strip_zeros
+
+{
+  no strict 'refs';
+  # correct empty arrays
+  $x = &{$C."::__strip_zeros"}([]); ok (@$x,1); ok ($x->[0],0);
+  # don't strip single elements
+  $x = &{$C."::__strip_zeros"}([0]); ok (@$x,1); ok ($x->[0],0);
+  $x = &{$C."::__strip_zeros"}([1]); ok (@$x,1); ok ($x->[0],1);
+  # don't strip non-zero elements
+  $x = &{$C."::__strip_zeros"}([0,1]);
+  ok (@$x,2); ok ($x->[0],0); ok ($x->[1],1);
+  $x = &{$C."::__strip_zeros"}([0,1,2]);
+  ok (@$x,3); ok ($x->[0],0); ok ($x->[1],1); ok ($x->[2],2);
+
+  # but strip leading zeros
+  $x = &{$C."::__strip_zeros"}([0,1,2,0]);
+  ok (@$x,3); ok ($x->[0],0); ok ($x->[1],1); ok ($x->[2],2);
+
+  $x = &{$C."::__strip_zeros"}([0,1,2,0,0]);
+  ok (@$x,3); ok ($x->[0],0); ok ($x->[1],1); ok ($x->[2],2);
+
+  $x = &{$C."::__strip_zeros"}([0,1,2,0,0,0]);
+  ok (@$x,3); ok ($x->[0],0); ok ($x->[1],1); ok ($x->[2],2);
+
+  # collapse multiple zeros
+  $x = &{$C."::__strip_zeros"}([0,0,0,0]);
+  ok (@$x,1); ok ($x->[0],0);
+}
+
+# done
+
+1;
+
diff --git a/dist/Math-BigInt-FastCalc/t/bootstrap.t b/dist/Math-BigInt-FastCalc/t/bootstrap.t
new file mode 100644
index 0000000000..1101966b98
--- /dev/null
+++ b/dist/Math-BigInt-FastCalc/t/bootstrap.t
@@ -0,0 +1,17 @@
+#!/usr/bin/perl -w
+
+use Test;
+BEGIN 
+  {
+  $| = 1;
+  unshift @INC, '../blib/lib';
+  unshift @INC, '../blib/arch';
+  unshift @INC, '../lib';
+  chdir 't' if -d 't' && !$ENV{PERL_CORE};
+  plan tests => 1;
+  };
+
+use Math::BigInt::FastCalc;
+
+ok(1); 		# could load it?
+
diff --git a/dist/Math-BigInt-FastCalc/t/leak.t b/dist/Math-BigInt-FastCalc/t/leak.t
new file mode 100644
index 0000000000..1adc831c81
--- /dev/null
+++ b/dist/Math-BigInt-FastCalc/t/leak.t
@@ -0,0 +1,87 @@
+#!/usr/bin/perl -w
+
+# Test for memory leaks.
+
+# XXX TODO: This test file doesn't actually seem to work! If you remove
+# the sv_2mortal() in the XS file, it still happily passes all tests...
+
+use Test::More;
+use strict;
+
+BEGIN
+  {
+  $| = 1;
+  chdir 't' if -d 't' && !$ENV{PERL_CORE};
+  unshift @INC, ('../lib', '../blib/arch');	# for running manually
+  plan tests => 22;
+  }
+
+use Math::BigInt::FastCalc;
+
+#############################################################################
+package Math::BigInt::FastCalc::LeakCheck;
+use base qw(Math::BigInt::FastCalc);
+
+my $destroyed = 0;
+sub DESTROY { $destroyed++; }
+
+#############################################################################
+package main;
+
+for my $method (qw(_zero _one _two _ten))
+  {
+  $destroyed = 0;
+    {
+    my $num = Math::BigInt::FastCalc::LeakCheck->$method();
+    bless $num, "Math::BigInt::FastCalc::LeakCheck";
+    }
+  is ($destroyed, 1, "$method does not leak memory");
+  }
+
+my $num = Math::BigInt::FastCalc->_zero();
+for my $method (qw(_is_zero _is_one _is_two _is_ten _num))
+  {
+  $destroyed = 0;
+    {
+    my $rc = Math::BigInt::FastCalc->$method($num);
+    bless \$rc, "Math::BigInt::FastCalc::LeakCheck";
+    }
+  is ($destroyed, 1, "$method does not leak memory");
+  }
+
+my $num_10 = Math::BigInt::FastCalc->_ten();
+my $num_2 = Math::BigInt::FastCalc->_two();
+
+my $num_long   = Math::BigInt::FastCalc->_new("1234567890");
+my $num_long_2 = Math::BigInt::FastCalc->_new("12345678900987654321");
+
+is (Math::BigInt::FastCalc->_str($num_long), "1234567890");
+is (Math::BigInt::FastCalc->_str($num_long_2), "12345678900987654321");
+
+# to hit all possible code branches
+_test_acmp($num, $num);
+_test_acmp($num_10, $num_10);
+_test_acmp($num, $num_10);
+_test_acmp($num_10, $num);
+_test_acmp($num, $num_2);
+_test_acmp($num_2, $num);
+_test_acmp($num_long, $num);
+_test_acmp($num, $num_long);
+_test_acmp($num_long, $num_long);
+_test_acmp($num_long, $num_long_2);
+_test_acmp($num_long_2, $num_long);
+
+sub _test_acmp
+  {
+  my ($n1,$n2) = @_;
+
+  $destroyed = 0;
+    {
+    my $rc = Math::BigInt::FastCalc->_acmp($n1,$n2);
+    bless \$rc, "Math::BigInt::FastCalc::LeakCheck";
+    }
+  my $n_1 = Math::BigInt::FastCalc->_str($n1);
+  my $n_2 = Math::BigInt::FastCalc->_str($n2);
+  is ($destroyed, 1, "_acmp($n_1,$n_2) does not leak memory");
+  }
+
diff --git a/dist/Math-BigInt-FastCalc/t/mbi_rand.t b/dist/Math-BigInt-FastCalc/t/mbi_rand.t
new file mode 100644
index 0000000000..52d3426f15
--- /dev/null
+++ b/dist/Math-BigInt-FastCalc/t/mbi_rand.t
@@ -0,0 +1,65 @@
+#!/usr/bin/perl -w
+
+use Test::More;
+use strict;
+
+my $count;
+  
+BEGIN
+  {
+  $| = 1;
+  if ($^O eq 'os390') { print "1..0\n"; exit(0) } # test takes too long there
+  unshift @INC, '../lib'; # for running manually
+  unshift @INC, '../blib/arch';
+  my $location = $0; $location =~ s/mbi_rand.t//;
+  unshift @INC, $location; # to locate the testing files
+  chdir 't' if -d 't' && !$ENV{PERL_CORE};
+  $count = 128;
+  plan tests => $count*2;
+  }
+
+use Math::BigInt lib => 'FastCalc';
+my $c = 'Math::BigInt';
+
+my $length = 128;
+
+# If you get a failure here, please re-run the test with the printed seed
+# value as input: perl t/mbi_rand.t seed
+
+my $seed = ($#ARGV == 0) ? $ARGV[0] : int(rand(65537));
+print "# seed: $seed\n"; srand($seed);
+
+my ($A,$B,$As,$Bs,$ADB,$AMB,$la,$lb);
+my $two = Math::BigInt->new(2);
+for (my $i = 0; $i < $count; $i++)
+  {
+  # length of A and B
+  $la = int(rand($length)+1); $lb = int(rand($length)+1);
+  $As = ''; $Bs = '';
+  # we create the numbers from "patterns", e.g. get a random number and a
+  # random count and string them together. This means things like
+  # "100000999999999999911122222222" are much more likely. If we just strung
+  # together digits, we would end up with "1272398823211223" etc.
+  while (length($As) < $la) { $As .= int(rand(100)) x int(rand(16)); }
+  while (length($Bs) < $lb) { $Bs .= int(rand(100)) x int(rand(16)); }
+  $As =~ s/^0+//; $Bs =~ s/^0+//; 
+  $As = $As || '0'; $Bs = $Bs || '0';
+  # print "# As $As\n# Bs $Bs\n";
+  $A = $c->new($As); $B = $c->new($Bs);
+  # print "# A $A\n# B $B\n";
+  if ($A->is_zero() || $B->is_zero())
+    {
+    is (1,1); is (1,1); next;
+    }
+  # check that int(A/B)*B + A % B == A holds for all inputs
+  # $X = ($A/$B)*$B + 2 * ($A % $B) - ($A % $B);
+  ($ADB,$AMB) = $A->copy()->bdiv($B);
+  print "# ". join(' ',Math::BigInt::Calc->_base_len()),"\n"
+   unless is ($ADB*$B+$two*$AMB-$AMB,$As);
+  # swap 'em and try this, too
+  # $X = ($B/$A)*$A + $B % $A;
+  ($ADB,$AMB) = $B->copy()->bdiv($A);
+  print "# ". join(' ',Math::BigInt::Calc->_base_len()),"\n"
+   unless is ($ADB*$A+$two*$AMB-$AMB,$Bs);
+  }
+