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89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/*
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* PROJECT: ReactOS Virtual DOS Machine
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* FILE: subsystems/mvdm/ntvdm/utils.c
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* PURPOSE: Utility Functions
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* PROGRAMMERS: Hermes Belusca-Maito (hermes.belusca@sfr.fr)
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*/
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/* INCLUDES *******************************************************************/
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#include "ntvdm.h"
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#define NDEBUG
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#include <debug.h>
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/* PRIVATE FUNCTIONS **********************************************************/
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/* PUBLIC FUNCTIONS ***********************************************************/
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VOID
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FileClose(IN HANDLE FileHandle)
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{
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CloseHandle(FileHandle);
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}
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HANDLE
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FileOpen(IN PCSTR FileName,
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OUT PULONG FileSize OPTIONAL)
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{
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HANDLE hFile;
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ULONG ulFileSize;
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/* Open the file */
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SetLastError(0); // For debugging purposes
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hFile = CreateFileA(FileName,
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GENERIC_READ,
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FILE_SHARE_READ,
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NULL,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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NULL);
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DPRINT1("File '%s' opening %s ; GetLastError() = %u\n",
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FileName, hFile != INVALID_HANDLE_VALUE ? "succeeded" : "failed", GetLastError());
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/* If we failed, bail out */
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if (hFile == INVALID_HANDLE_VALUE) return NULL;
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/* OK, we have a handle to the file */
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/*
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* Retrieve the size of the file. In NTVDM we will handle files
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* of maximum 1Mb so we can largely use GetFileSize only.
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*/
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ulFileSize = GetFileSize(hFile, NULL);
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if (ulFileSize == INVALID_FILE_SIZE && GetLastError() != ERROR_SUCCESS)
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{
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/* We failed, bail out */
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DPRINT1("Error when retrieving file size, or size too large (%d)\n", ulFileSize);
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FileClose(hFile);
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return NULL;
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}
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/* Success, return file handle and size if needed */
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if (FileSize) *FileSize = ulFileSize;
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return hFile;
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}
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BOOLEAN
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FileLoadByHandle(IN HANDLE FileHandle,
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IN PVOID Location,
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IN ULONG FileSize,
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OUT PULONG BytesRead)
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{
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BOOLEAN Success;
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/* Attempt to load the file into memory */
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SetLastError(0); // For debugging purposes
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Success = !!ReadFile(FileHandle,
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Location, // REAL_TO_PHYS(LocationRealPtr),
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FileSize,
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BytesRead,
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NULL);
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DPRINT1("File loading %s ; GetLastError() = %u\n", Success ? "succeeded" : "failed", GetLastError());
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return Success;
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}
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/* EOF */
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