zwfile.c File Reference

#include <wdm.h>
#include <reactos/rossym.h>
#include "rossympriv.h"

Include dependency graph for zwfile.c:

Go to the source code of this file.

Macros
#define	NTOSAPI

Functions
BOOLEAN	RosSymZwReadFile (PVOID FileContext, PVOID Buffer, ULONG Size)
BOOLEAN	RosSymZwSeekFile (PVOID FileContext, ULONG_PTR Position)

Macro Definition Documentation

NTOSAPI

#define NTOSAPI

Definition at line 10 of file zwfile.c.

Function Documentation

RosSymZwReadFile()

BOOLEAN RosSymZwReadFile	(	PVOID	FileContext,
		PVOID	Buffer,
		ULONG	Size
	)

Definition at line 16 of file zwfile.c.

{
  NTSTATUS Status;
  IO_STATUS_BLOCK IoStatusBlock;
 
  Status = ZwReadFile(*((HANDLE *) FileContext),
                      NULL, NULL, NULL,
                      &IoStatusBlock,
                      Buffer,
                      Size,
                      NULL, NULL);
 
  return NT_SUCCESS(Status) && IoStatusBlock.Information == Size;
}

RosSymZwSeekFile()

BOOLEAN RosSymZwSeekFile	(	PVOID	FileContext,
		ULONG_PTR	Position
	)

Definition at line 32 of file zwfile.c.

{
  NTSTATUS Status;
  IO_STATUS_BLOCK IoStatusBlock;
  FILE_POSITION_INFORMATION NewPosition;
 
  NewPosition.CurrentByteOffset.u.HighPart = 0;
  NewPosition.CurrentByteOffset.u.LowPart = Position;
  Status = ZwSetInformationFile(*((HANDLE *) FileContext),
                                &IoStatusBlock,
                                (PVOID) &NewPosition,
                                sizeof(FILE_POSITION_INFORMATION),
                                FilePositionInformation);
 
  return NT_SUCCESS(Status);
}