EDK2编写UEFI程序,对比两个文件的内容是否一样,若不一样,将对比结果输出至新的文件
时间: 2024-05-15 09:16:42 浏览: 160
这里提供一个简单的示例代码,可以对比两个文件的内容是否一样,并将对比结果输出至新的文件。
```c
#include <Uefi.h>
#include <Library/UefiLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/FileHandleLib.h>
#define FILE1_PATH L"\\file1.txt"
#define FILE2_PATH L"\\file2.txt"
#define RESULT_FILE_PATH L"\\result.txt"
EFI_STATUS
EFIAPI
CompareFiles()
{
EFI_STATUS Status;
EFI_FILE_HANDLE File1, File2, ResultFile;
UINTN File1Size, File2Size;
UINTN BufferSize;
CHAR8 *File1Buffer, *File2Buffer;
UINTN i;
BOOLEAN Match = TRUE;
// Open file 1
Status = OpenFile(&File1, FILE1_PATH, EFI_FILE_MODE_READ);
if (EFI_ERROR(Status)) {
Print(L"Failed to open file 1: %r\n", Status);
return Status;
}
// Open file 2
Status = OpenFile(&File2, FILE2_PATH, EFI_FILE_MODE_READ);
if (EFI_ERROR(Status)) {
Print(L"Failed to open file 2: %r\n", Status);
CloseFile(File1);
return Status;
}
// Get file sizes
Status = GetFileSize(File1, &File1Size);
if (EFI_ERROR(Status)) {
Print(L"Failed to get file 1 size: %r\n", Status);
CloseFile(File1);
CloseFile(File2);
return Status;
}
Status = GetFileSize(File2, &File2Size);
if (EFI_ERROR(Status)) {
Print(L"Failed to get file 2 size: %r\n", Status);
CloseFile(File1);
CloseFile(File2);
return Status;
}
// Check if file sizes match
if (File1Size != File2Size) {
Match = FALSE;
Print(L"File sizes do not match!\n");
}
// Allocate memory for file buffers
BufferSize = MAX(File1Size, File2Size);
File1Buffer = AllocatePool(BufferSize);
if (File1Buffer == NULL) {
Print(L"Failed to allocate memory for file 1 buffer.\n");
CloseFile(File1);
CloseFile(File2);
return EFI_OUT_OF_RESOURCES;
}
File2Buffer = AllocatePool(BufferSize);
if (File2Buffer == NULL) {
Print(L"Failed to allocate memory for file 2 buffer.\n");
FreePool(File1Buffer);
CloseFile(File1);
CloseFile(File2);
return EFI_OUT_OF_RESOURCES;
}
// Read file 1 into buffer
Status = ReadFile(File1, File1Buffer, &BufferSize);
if (EFI_ERROR(Status)) {
Print(L"Failed to read file 1: %r\n", Status);
FreePool(File1Buffer);
FreePool(File2Buffer);
CloseFile(File1);
CloseFile(File2);
return Status;
}
// Read file 2 into buffer
Status = ReadFile(File2, File2Buffer, &BufferSize);
if (EFI_ERROR(Status)) {
Print(L"Failed to read file 2: %r\n", Status);
FreePool(File1Buffer);
FreePool(File2Buffer);
CloseFile(File1);
CloseFile(File2);
return Status;
}
// Compare file buffers
for (i = 0; i < BufferSize; i++) {
if (File1Buffer[i] != File2Buffer[i]) {
Match = FALSE;
break;
}
}
if (Match) {
Print(L"Files match!\n");
} else {
Print(L"Files do not match!\n");
}
// Open result file
Status = OpenFile(&ResultFile, RESULT_FILE_PATH, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE|EFI_FILE_MODE_CREATE);
if (EFI_ERROR(Status)) {
Print(L"Failed to open result file: %r\n", Status);
FreePool(File1Buffer);
FreePool(File2Buffer);
CloseFile(File1);
CloseFile(File2);
return Status;
}
// Write result to result file
if (Match) {
Status = WriteFile(ResultFile, "Files match!\r\n", 15);
} else {
Status = WriteFile(ResultFile, "Files do not match!\r\n", 21);
}
if (EFI_ERROR(Status)) {
Print(L"Failed to write result to file: %r\n", Status);
}
// Close files and free memory
FreePool(File1Buffer);
FreePool(File2Buffer);
CloseFile(File1);
CloseFile(File2);
CloseFile(ResultFile);
return Status;
}
```
这个示例代码会打开文件1和文件2,读取它们的内容并进行比较。如果两个文件的内容相同,会输出“Files match!”,否则会输出“Files do not match!”。然后,它会打开一个名为“result.txt”的新文件,并将对比结果写入该文件中。请注意,如果文件大小不同,则认为文件内容不匹配。这个示例代码还使用了一些之前提到过的函数,例如OpenFile()、CloseFile()、GetFileSize()、ReadFile()和WriteFile(),这些函数都是用来处理文件操作的。如果您需要在自己的代码中使用这些函数,请确保您已经正确包含了相关的头文件和库。
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