* bignum.c (bary_2comp): Extracted from get2comp.
  (integer_unpack_num_bdigits): Extracted from
  rb_integer_unpack_internal.
  (bary_unpack_internal): Renamed from bary_unpack and support
  INTEGER_PACK_2COMP.
  (bary_unpack): New function to validate arguments and invoke
  bary_unpack_internal.
  (rb_integer_unpack_internal): Removed.
  (rb_integer_unpack): Invoke bary_unpack_internal.
  (rb_integer_unpack_2comp): Removed.

* internal.h (rb_integer_unpack_2comp): Removed.

* pack.c: Follow the above change.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41337 b2dd03c8-39d4-4d8f-98ff-823fe69b080e