Add methods for creating Bigint objects from unsigned 64-bit integers.

Add methods for creating Bigint objects from unsigned 64-bit integers.

Committed: https://code.google.com/p/dart/source/detail?r=1495

[siva, 2011-11-12 01:20:07]

lgtm

http://codereview.chromium.org/8539034/diff/1/runtime/vm/bigint_operations.cc
File runtime/vm/bigint_operations.cc (right):

http://codereview.chromium.org/8539034/diff/1/runtime/vm/bigint_operations.cc...
runtime/vm/bigint_operations.cc:356: }
This code here seems identical to ToInt64 except the initial ASSERT and the
final check for bigint.IsNegative.
Maybe the command code can be factored into a static method.

[cshapiro, 2011-11-12 01:50:09]

PTAL

http://codereview.chromium.org/8539034/diff/1/runtime/vm/bigint_operations.cc
File runtime/vm/bigint_operations.cc (right):

http://codereview.chromium.org/8539034/diff/1/runtime/vm/bigint_operations.cc...
runtime/vm/bigint_operations.cc:356: }
Good idea.  I am not sure how I missed that.  Done.

[siva, 2011-11-12 01:54:00]

LGTM

[Anton Muhin, 2011-11-15 14:43:35]

May I ask you to expose this functionality via embedder's API as well?

[cshapiro, 2011-11-15 21:13:31]

Certainly.  I will put something together shortly that surfaces this through the
C API.