blaze_util_windows: use some widechar Win32 API

In this change:
- implement PrintErrorW (copy of PrintError but
uses FormatMessageW)
- use GetModuleFileNameW in GetSelfPath and do not
worry about UNC paths, we'll automatically handle
them in the future when we use widechar
functions everywhere. Until then, if a path
happens to have the "\\?\" prefix and that causes
an error, we won't be worse off than today; today
we just call `pdie`
- use GetTempPathW in GetOutputRoot; in theory
this might also return an UNC path but again that
shouldn't be a problem
- add comments for the arguments of CreateFileA
and CreateProcessA calls, to make the code a bit
more readable

See https://github.com/bazelbuild/bazel/issues/2181

--
PiperOrigin-RevId: 142118854
MOS_MIGRATED_REVID=142118854
1 file changed
tree: a2c45467004714e121c6544bc6d3cfe4c84fbeed
  1. examples/
  2. scripts/
  3. site/
  4. src/
  5. third_party/
  6. tools/
  7. .gitattributes
  8. .gitignore
  9. AUTHORS
  10. BUILD
  11. CHANGELOG.md
  12. combine_distfiles.sh
  13. compile.sh
  14. CONTRIBUTING.md
  15. CONTRIBUTORS
  16. ISSUE_TEMPLATE.md
  17. LICENSE.txt
  18. README.md
  19. WORKSPACE
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