lib/rossym/zwfile.c

   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 #define NTOSAPI
  11 #include <ntddk.h>
  12 #include <reactos/rossym.h>
  13 #include "rossympriv.h"
  14
  15 #define NDEBUG
  16 #include <debug.h>
  17
  18 NTSTATUS RosSymStatus;
  19
  20 BOOLEAN
  21 RosSymZwReadFile(PVOID FileContext, PVOID Buffer, ULONG Size)
  22 {
  23         //NTSTATUS Status;
  24   IO_STATUS_BLOCK IoStatusBlock;
  25
  26   RosSymStatus = ZwReadFile(*((HANDLE *) FileContext),
  27                       0, 0, 0,
  28                       &IoStatusBlock,
  29                       Buffer,
  30                       Size,
  31                       0, 0);
  32
  33   return NT_SUCCESS(RosSymStatus) && IoStatusBlock.Information == Size;
  34 }
  35
  36 BOOLEAN
  37 RosSymZwSeekFile(PVOID FileContext, ULONG_PTR Position)
  38 {
  39         //NTSTATUS Status;
  40   IO_STATUS_BLOCK IoStatusBlock;
  41   FILE_POSITION_INFORMATION NewPosition;
  42
  43   NewPosition.CurrentByteOffset.u.HighPart = 0;
  44   NewPosition.CurrentByteOffset.u.LowPart = Position;
  45   RosSymStatus = ZwSetInformationFile(*((HANDLE *) FileContext),
  46                                 &IoStatusBlock,
  47                                 (PVOID) &NewPosition,
  48                                 sizeof(FILE_POSITION_INFORMATION),
  49                                 FilePositionInformation);
  50
  51   return NT_SUCCESS(RosSymStatus);
  52 }
  53
  54 /* EOF */