Class: Win32::Registry

Inherits:
Object
  • Object
show all
Defined in:
lib/chef/monkey_patches/win32/registry.rb

Defined Under Namespace

Modules: API

Instance Method Summary collapse

Instance Method Details

#export_string(str, enc = Encoding.default_internal || "utf-8") ⇒ Object

::Win32::Registry#export_string is used when enumerating child keys and values and re encodes a UTF-16LE to the local codepage. This can result in encoding incompatibilities if the native codepage does not support the characters in the registry. There is an open bug in ruby at https://bugs.ruby-lang.org/issues/11410. Rather than converting the UTF-16LE originally returned by the win32 api, we encode to UTF-8 which will likely not result in any conversion error.


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# File 'lib/chef/monkey_patches/win32/registry.rb', line 32

def export_string(str, enc = Encoding.default_internal || "utf-8")
  str.encode(enc)
end

#write(name, type, data) ⇒ Object

::Win32::Registry#write does not correctly handle data in Ruby 2.1 This bug is reportedly resolved in Ruby 2.1.7 and 2.2.3 but fails in appveyor on 2.1.8 unless we keep applying this monkeypatch https://bugs.ruby-lang.org/issues/11439


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# File 'lib/chef/monkey_patches/win32/registry.rb', line 65

def write(name, type, data)
  case type
  when REG_SZ, REG_EXPAND_SZ
    data = data.to_s.encode(WCHAR) + WCHAR_NUL
  when REG_MULTI_SZ
    data = data.to_a.map { |s| s.encode(WCHAR) }.join(WCHAR_NUL) << WCHAR_NUL << WCHAR_NUL
  when REG_BINARY
    data = data.to_s
  when REG_DWORD
    data = API.packdw(data.to_i)
  when REG_DWORD_BIG_ENDIAN
    data = [data.to_i].pack("N")
  when REG_QWORD
    data = API.packqw(data.to_i)
  else
    raise TypeError, "Unsupported type #{type}"
  end
  API.SetValue(@hkey, name, type, data, data.bytesize)
end