reactos/drivers/input/kbdclass/misc.c
Victor Perevertkin 7ed1883c8e
[DRIVERS] Use IoForwardIrpSynchronously in drivers
Instead of having an own routine in each driver
IoForwardIrpSynchronously can be used.
2022-01-05 02:17:56 +03:00

73 lines
2 KiB
C

/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS Keyboard class driver
* FILE: drivers/input/kbdclass/misc.c
* PURPOSE: Miscellaneous operations
*
* PROGRAMMERS: Hervé Poussineau (hpoussin@reactos.org)
*/
#include "kbdclass.h"
#include <debug.h>
NTSTATUS NTAPI
ForwardIrpAndForget(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
PDEVICE_OBJECT LowerDevice;
ASSERT(!((PCOMMON_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->IsClassDO);
LowerDevice = ((PPORT_DEVICE_EXTENSION)DeviceObject->DeviceExtension)->LowerDevice;
IoSkipCurrentIrpStackLocation(Irp);
return IoCallDriver(LowerDevice, Irp);
}
NTSTATUS
DuplicateUnicodeString(
IN ULONG Flags,
IN PCUNICODE_STRING SourceString,
OUT PUNICODE_STRING DestinationString)
{
if (SourceString == NULL || DestinationString == NULL
|| SourceString->Length > SourceString->MaximumLength
|| (SourceString->Length == 0 && SourceString->MaximumLength > 0 && SourceString->Buffer == NULL)
|| Flags == RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING || Flags >= 4)
{
return STATUS_INVALID_PARAMETER;
}
if ((SourceString->Length == 0)
&& (Flags != (RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE |
RTL_DUPLICATE_UNICODE_STRING_ALLOCATE_NULL_STRING)))
{
DestinationString->Length = 0;
DestinationString->MaximumLength = 0;
DestinationString->Buffer = NULL;
}
else
{
USHORT DestMaxLength = SourceString->Length;
if (Flags & RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE)
DestMaxLength += sizeof(UNICODE_NULL);
DestinationString->Buffer = ExAllocatePoolWithTag(PagedPool, DestMaxLength, CLASS_TAG);
if (DestinationString->Buffer == NULL)
return STATUS_NO_MEMORY;
RtlCopyMemory(DestinationString->Buffer, SourceString->Buffer, SourceString->Length);
DestinationString->Length = SourceString->Length;
DestinationString->MaximumLength = DestMaxLength;
if (Flags & RTL_DUPLICATE_UNICODE_STRING_NULL_TERMINATE)
DestinationString->Buffer[DestinationString->Length / sizeof(WCHAR)] = 0;
}
return STATUS_SUCCESS;
}