String#pack with 'Q', 'q' patterns should treat 64bit numbers as big-endian
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Key: JRUBY-2173
URL: http://jira.codehaus.org/browse/JRUBY-2173
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.1RC2
Environment: Latest JRuby 1.1RC2
Reporter: Vladimir Sizikov
Assignee: Vladimir Sizikov
JRuby, being executed on 'java' platform, is effectively big-endian, as Java
itself.
unpack with 'Q' and 'q' patterns, treats numbers as 64 bit in "native" platform
endiannes, and in JRuby case it means the numbers should be big-endian.
New rubyspecs were recently added, and they fail with JRuby, since JRuby uses
little-endian numbers for Q, q.
String#unpack with 'Q' and 'q' directives returns an array in big-endian
(native format) order by decoding self according to the format string FAILED
Expected [17344245288696546035] to equal [17510558585478951920]:
/opt/work/rubinius/./mspec/expectations.rb:10:in `fail_with'
/opt/work/rubinius/./mspec/matchers/base.rb:16:in `=='
/opt/work/rubinius/./spec/ruby/1.8/core/string/unpack_spec.rb:119
/opt/work/rubinius/./mspec/runner/mspec.rb:102:in `call'
/opt/work/rubinius/./mspec/runner/mspec.rb:102:in `protect'
/opt/work/rubinius/./mspec/runner/state.rb:46:in `each'
/opt/work/rubinius/./mspec/runner/state.rb:46:in `protect'
/opt/work/rubinius/./mspec/runner/state.rb:59:in `process'
/opt/work/rubinius/./mspec/runner/state.rb:55:in `each'
/opt/work/rubinius/./mspec/runner/state.rb:55:in `process'
/opt/work/rubinius/./mspec/runner/mspec.rb:10:in `describe'
/opt/work/rubinius/./mspec/runner/object.rb:11:in `describe'
/opt/work/rubinius/./spec/ruby/1.8/core/string/unpack_spec.rb:98
/opt/work/rubinius/./mspec/runner/mspec.rb:27:in `load'
/opt/work/rubinius/./mspec/runner/mspec.rb:27:in `files'
/opt/work/rubinius/./mspec/runner/mspec.rb:102:in `call'
/opt/work/rubinius/./mspec/runner/mspec.rb:102:in `protect'
/opt/work/rubinius/./mspec/runner/mspec.rb:27:in `files'
/opt/work/rubinius/./mspec/runner/mspec.rb:24:in `each'
/opt/work/rubinius/./mspec/runner/mspec.rb:24:in `files'
/opt/work/rubinius/./mspec/runner/mspec.rb:17:in `process'
mspec/bin/mspec-run:36
"\xF3\x02\x00\x42\x32\x23\xB3\xF0".unpack('Q') ==> [17344245288696546035]
But should: [17510558585478951920].
Fix is coming.
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