internal void GetValue(
string lpSubKey,
string lpValue,
Win32Api.RegRestrictionFlags dwFlags,
/*ref UInt32*/ IntPtr pdwType,
IntPtr pvData,
/*ref UInt32*/ IntPtr pcbData)
{
ApplyReadOperation(lpSubKey, new KeySecurity(Win32Api.KeySecurity.KEY_QUERY_VALUE),
keyImpl =>
TryAlterData(lpSubKey, lpValue, keyImpl, pdwType,
new Data(pvData, pcbData, Data.CountIn.Bytes),
(newpdwType, dst) =>
Win32Exception.CatchError(
() => keyImpl.TryGetValue(lpValue, dwFlags, newpdwType,
dst.Ptr, dst.PCount))));
}
public void QueryValue(
string lpSubKey,
string lpValueName,
IntPtr lpReserved,
IntPtr lpType,
IntPtr lpData,
IntPtr lpcbData)
{
// This function is implemented explicitely and separately from
// GetValue because RegQueryValue and RegGetValue behavior in regard
// to strings and null characters differ.
ApplyReadOperation(lpSubKey, new KeySecurity(Win32Api.KeySecurity.KEY_QUERY_VALUE),
keyImpl =>
TryAlterData(lpSubKey, lpValueName, keyImpl, lpType,
new Data(lpData, lpcbData, Data.CountIn.Bytes),
(newpdwType, dst) =>
Win32Exception.CatchError(
() => keyImpl.TryQueryValue(lpValueName, lpReserved, newpdwType,
dst.Ptr, dst.PCount))));
}
public void EnumValue(
uint dwIndex,
IntPtr lpValueName,
/*ref UInt32*/ IntPtr lpcchValueName,
IntPtr lpReserved,
/*ref Win32Api.RegValueType*/ IntPtr lpType,
IntPtr lpData,
/*ref UInt32*/ IntPtr lpcbData)
{
// TODO: this function does not take into account the intersection
// of value names between windows regisry key and offreg key, this is
// to be done in the next version
// It does not matter if the current key is open in windows registry or in offreg
// we need to open and enumerate both them
int cchValueName = 0;
if (lpcchValueName != IntPtr.Zero)
{
cchValueName = Marshal.ReadInt32(lpcchValueName);
}
KeyImplOperation enumValue = keyImpl =>
TryAlterData(null, null, keyImpl, lpType,
new Data(lpData, lpcbData, Data.CountIn.Bytes),
(newpdwType, dst) =>
Win32Exception.CatchError(
() =>
{
// EnumValue takes buffer size WITH null character
// but returns WITHOUT, so we need to reset input
// param to allow multiple calls to the operation
if (lpcchValueName != IntPtr.Zero)
{
Marshal.WriteInt32(lpcchValueName, cchValueName);
}
keyImpl.EnumValue(dwIndex, lpValueName,
lpcchValueName, lpReserved, newpdwType,
dst.Ptr, dst.PCount);
}));
foreach (KeyDisposition disposition in HIVES_REVERSE_ORDER)
{
bool indexHandled = false;
TryApplyOperation(disposition, null,
new KeySecurity(Win32Api.KeySecurity.KEY_QUERY_VALUE), keyImpl =>
{
uint cValues = keyImpl.QueryInfo().ValuesNumber;
if (dwIndex < cValues)
{
enumValue(keyImpl);
indexHandled = true;
}
else
{
dwIndex -= cValues;
}
return(true);
});
if (indexHandled)
{
return;
}
}
throw Win32Exception.Create((int)Win32Api.Error.ERROR_NO_MORE_ITEMS);
}
