[ruby-core:66542] [ruby-trunk - Bug #10493] Wrong encoding for Etc.getlogin in Windows

Issue #10493 has been updated by Usaku NAKAMURA.

Backport changed from 2.0.0: REQUIRED, 2.1: REQUIRED to 2.0.0: DONE, 2.1: REQUIRED

Backported into `ruby_2_0_0` at r48634.

memo:
I changed the patch a little, because 2.0.0 doesn't have rb_w32_wstr_to_mbstr().
2.1 has the function, so I guess it's no problem to backport to 2.1 from trunk.

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Bug #10493: Wrong encoding for Etc.getlogin in Windows
https://bugs.ruby-lang.org/issues/10493#change-50157

* Author: Dāvis Mosāns
* Status: Closed
* Priority: Normal
* Assignee: 
* Category: ext
* Target version: current: 2.2.0
* ruby -v: ruby 2.1.4p265 (2014-10-27 revision 48166) [x64-mingw32]
* Backport: 2.0.0: DONE, 2.1: REQUIRED
----------------------------------------

~~~ruby
name = Etc.getlogin # I've Windows username "Dāvis"
puts name           # D�vis
puts name.inspect   # "D\xE2vis"
puts name.encoding  # ASCII-8BIT
name.force_encoding('Windows-1257')
puts name           # Dāvis
~~~

As you can see \xE2 isn't "ā" in ASCII, but it is for Windws-1257 encoding.






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