huwcampbell.com
Reactos
1/*
2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS kernel
4 * FILE: lib/rossym/zwfile.c
5 * PURPOSE: File I/O using native functions
6 *
7 * PROGRAMMERS: Ge van Geldorp (gvg@reactos.com)
8 */
9
10#include <wdm.h>
11#include <reactos/rossym.h>
12#include "rossympriv.h"
13
14BOOLEAN
15RosSymZwReadFile(PVOID FileContext, PVOID Buffer, ULONG Size)
16{
17 NTSTATUS Status;
18 IO_STATUS_BLOCK IoStatusBlock;
19
20 Status = ZwReadFile(*((HANDLE *) FileContext),
21 NULL, NULL, NULL,
22 &IoStatusBlock,
23 Buffer,
24 Size,
25 NULL, NULL);
26
27 return NT_SUCCESS(Status) && IoStatusBlock.Information == Size;
28}
29
30BOOLEAN
31RosSymZwSeekFile(PVOID FileContext, ULONG_PTR Position)
32{
33 NTSTATUS Status;
34 IO_STATUS_BLOCK IoStatusBlock;
35 FILE_POSITION_INFORMATION NewPosition;
36
37 NewPosition.CurrentByteOffset.u.HighPart = 0;
38 NewPosition.CurrentByteOffset.u.LowPart = Position;
39 Status = ZwSetInformationFile(*((HANDLE *) FileContext),
40 &IoStatusBlock,
41 (PVOID) &NewPosition,
42 sizeof(FILE_POSITION_INFORMATION),
43 FilePositionInformation);
44
45 return NT_SUCCESS(Status);
46}