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Vector.pod  view on Meta::CPAN

Note that all methods whose names begin with "C<Word_>" are
B<MACHINE-DEPENDENT>!

They depend on the size (number of bits) of an "unsigned int" (C type) on
your machine.

Therefore, you should only use these methods if you are B<ABSOLUTELY CERTAIN>
that portability of your code is not an issue!

Note that you can use arbitrarily large chunks (i.e., fragments of bit vectors)
of up to 32 bits B<IN A PORTABLE WAY> using the methods whose names begin with
"C<Chunk_>".

=item *

Chunk sizes

Note that legal chunk sizes for all methods whose names begin with "C<Chunk_>"
range from "C<1>" to "C<Bit::Vector-E<gt>Long_Bits();>" bits ("C<0>" is B<NOT>
allowed!).

Vector.pod  view on Meta::CPAN

has occured. In list context, the method returns the carry
and the overflow flag (in this order).

The overflow flag is true ("C<1>") if the sign (i.e., the most
significant bit) of the result is wrong. This can happen when
adding two very large positive numbers or when adding two (by
their absolute value) very large negative numbers. See also
further below.

The carry in- and output is needed mainly for cascading, i.e.,
to add numbers that are fragmented into several pieces.

Example:

  # initialize

  for ( $i = 0; $i < $n; $i++ )
  {
      $a[$i] = Bit::Vector->new($bits);
      $b[$i] = Bit::Vector->new($bits);
      $c[$i] = Bit::Vector->new($bits);

Vector.pod  view on Meta::CPAN

indicates if a carry over (to the next higher bit position)
has occured. In list context, the method returns the carry
and the overflow flag (in this order).

The overflow flag is true ("C<1>") if the sign (i.e., the most
significant bit) of the result is wrong. This can happen when
subtracting a very large negative number from a very large
positive number or vice-versa. See also further below.

The carry in- and output is needed mainly for cascading, i.e.,
to subtract numbers that are fragmented into several pieces.

Example:

  # initialize

  for ( $i = 0; $i < $n; $i++ )
  {
      $a[$i] = Bit::Vector->new($bits);
      $b[$i] = Bit::Vector->new($bits);
      $c[$i] = Bit::Vector->new($bits);