Module: MiniRegistry

Defined in:
ext/oci8/oraconf.rb

Defined Under Namespace

Classes: MiniRegistryError

Constant Summary collapse

ERROR_SUCCESS =

I looked in Win32Module by MoonWolf <URL:www.moonwolf.com/ruby/>, copy the minimum code and reorganize it.

0
ERROR_FILE_NOT_FOUND = 
2
ERROR_NO_MORE_ITEMS = 
259
HKEY_LOCAL_MACHINE = 
0x80000002
KEY_ENUMERATE_SUB_KEYS = 
0x0008
KEY_QUERY_VALUE = 
0x0001
RegOpenKeyExA = 
Win32API.new('advapi32', 'RegOpenKeyExA', 'LPLLP', 'L')
RegEnumKeyExA = 
Win32API.new('advapi32', 'RegEnumKeyExA', 'LLPPPPPP', 'L')
RegQueryValueExA = 
Win32API.new('advapi32','RegQueryValueExA','LPPPPP','L')
RegCloseKey = 
Win32API.new('advapi32', 'RegCloseKey', 'L', 'L')

Class Method Summary collapse

Class Method Details

.enum_homes ⇒ Object 



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# File 'ext/oci8/oraconf.rb', line 52

def self.enum_homes
  phkResult = [0].pack('L')
  code = RegOpenKeyExA.call(HKEY_LOCAL_MACHINE, 'SOFTWARE\ORACLE', 0, 0x20019, phkResult)
  if code != ERROR_SUCCESS
    raise MiniRegistryError.new("Win32::RegOpenKeyExA", code)
  end
  hKey = phkResult.unpack('L')[0]
  idx = 0
  maxkeylen = 256
  loop do
    lpName = "\0" * maxkeylen
    lpcName = [maxkeylen].pack('L')
    code = RegEnumKeyExA.call(hKey, idx, lpName, lpcName, nil, nil, nil, nil);
    break if code == ERROR_NO_MORE_ITEMS
    if code != ERROR_SUCCESS
      RegCloseKey.call(hKey)
      raise MiniRegistryError.new("Win32::RegEnumKeyEx", code)
    end
    code = RegOpenKeyExA.call(hKey, lpName, 0, KEY_QUERY_VALUE, phkResult)
    if code != ERROR_SUCCESS
      RegCloseKey.call(hKey)
      raise MiniRegistryError.new("Win32::RegEnumKeyEx", code)
    end
    hSubkey = phkResult.unpack('L')[0]

    name = get_str_value(hSubkey, 'ORACLE_HOME_NAME')
    path = get_str_value(hSubkey, 'ORACLE_HOME')
    yield name, path
    RegCloseKey.call(hSubkey)
    idx += 1
  end
  RegCloseKey.call(hKey)
end

.get_str_value(hKey, name) ⇒ Object 



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# File 'ext/oci8/oraconf.rb', line 33

def self.get_str_value(hKey, name)
  lpcbData = [0].pack('L')
  code = RegQueryValueExA.call(hKey, name, nil, nil, nil, lpcbData)
  if code == ERROR_FILE_NOT_FOUND
    return nil
  elsif code != ERROR_SUCCESS
    raise MiniRegistryError.new("Win32::RegQueryValueExA",code)
  end
  len = lpcbData.unpack('L')[0]
  lpType = [0].pack('L')
  lpData = "\0"*len
  lpcbData = [len].pack('L')
  code = RegQueryValueExA.call(hKey, name, nil, lpType, lpData, lpcbData)
  if code != ERROR_SUCCESS
    raise MiniRegistryError.new("Win32::RegQueryValueExA",code)
  end
  lpData.unpack('Z*')[0]
end