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audk/ShellPkg/Library/UefiShellDebug1CommandsLib/Comp.c

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/** @file
Main file for Comp shell Debug1 function.
(C) Copyright 2015 Hewlett-Packard Development Company, L.P.<BR>
Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "UefiShellDebug1CommandsLib.h"
STATIC CONST SHELL_PARAM_ITEM ParamList[] = {
{L"-n", TypeValue},
{L"-s", TypeValue},
{NULL, TypeMax}
};
typedef enum {
OutOfDiffPoint,
InDiffPoint,
InPrevDiffPoint
} READ_STATUS;
//
// Buffer type, for reading both file operands in chunks.
//
typedef struct {
UINT8 *Data; // dynamically allocated buffer
UINTN Allocated; // the allocated size of Data
UINTN Next; // next position in Data to fetch a byte at
UINTN Left; // number of bytes left in Data for fetching at Next
} FILE_BUFFER;
/**
Function to print differnt point data.
@param[in] FileName File name.
@param[in] FileTag File tag name.
@param[in] Buffer Data buffer to be printed.
@param[in] BufferSize Size of the data to be printed.
@param[in] Address Address of the differnt point.
@param[in] DifferentBytes Total size of the buffer.
**/
VOID
PrintDifferentPoint(
CONST CHAR16 *FileName,
CHAR16 *FileTag,
UINT8 *Buffer,
UINT64 BufferSize,
UINTN Address,
UINT64 DifferentBytes
)
{
UINTN Index;
ShellPrintEx (-1, -1, L"%s: %s\r\n %08x:", FileTag, FileName, Address);
//
// Print data in hex-format.
//
for (Index = 0; Index < BufferSize; Index++) {
ShellPrintEx (-1, -1, L" %02x", Buffer[Index]);
}
if (BufferSize < DifferentBytes) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_COMP_END_OF_FILE), gShellDebug1HiiHandle);
}
ShellPrintEx (-1, -1, L" *");
//
// Print data in char-format.
//
for (Index = 0; Index < BufferSize; Index++) {
if (Buffer[Index] >= 0x20 && Buffer[Index] <= 0x7E) {
ShellPrintEx (-1, -1, L"%c", Buffer[Index]);
} else {
//
// Print dots for control characters
//
ShellPrintEx (-1, -1, L".");
}
}
ShellPrintEx (-1, -1, L"*\r\n");
}
/**
Initialize a FILE_BUFFER.
@param[out] FileBuffer The FILE_BUFFER to initialize. On return, the caller
is responsible for checking FileBuffer->Data: if
FileBuffer->Data is NULL on output, then memory
allocation failed.
**/
STATIC
VOID
FileBufferInit (
OUT FILE_BUFFER *FileBuffer
)
{
FileBuffer->Allocated = PcdGet32 (PcdShellFileOperationSize);
FileBuffer->Data = AllocatePool (FileBuffer->Allocated);
FileBuffer->Left = 0;
}
/**
Uninitialize a FILE_BUFFER.
@param[in,out] FileBuffer The FILE_BUFFER to uninitialize. The caller is
responsible for making sure FileBuffer was first
initialized with FileBufferInit(), successfully or
unsuccessfully.
**/
STATIC
VOID
FileBufferUninit (
IN OUT FILE_BUFFER *FileBuffer
)
{
SHELL_FREE_NON_NULL (FileBuffer->Data);
}
/**
Read a byte from a SHELL_FILE_HANDLE, buffered with a FILE_BUFFER.
@param[in] FileHandle The SHELL_FILE_HANDLE to replenish FileBuffer
from, if needed.
@param[in,out] FileBuffer The FILE_BUFFER to read a byte from. If FileBuffer
is empty on entry, then FileBuffer is refilled
from FileHandle, before outputting a byte from
FileBuffer to Byte. The caller is responsible for
ensuring that FileBuffer was successfully
initialized with FileBufferInit().
@param[out] BytesRead On successful return, BytesRead is set to 1 if the
next byte from FileBuffer has been stored to Byte.
On successful return, BytesRead is set to 0 if
FileBuffer is empty, and FileHandle is at EOF.
When an error is returned, BytesRead is not set.
@param[out] Byte On output, the next byte from FileBuffer. Only set
if (a) EFI_SUCCESS is returned and (b) BytesRead
is set to 1 on output.
@retval EFI_SUCCESS BytesRead has been set to 0 or 1. In the latter case,
Byte has been set as well.
@return Error codes propagated from
gEfiShellProtocol->ReadFile().
**/
STATIC
EFI_STATUS
FileBufferReadByte (
IN SHELL_FILE_HANDLE FileHandle,
IN OUT FILE_BUFFER *FileBuffer,
OUT UINTN *BytesRead,
OUT UINT8 *Byte
)
{
UINTN ReadSize;
EFI_STATUS Status;
if (FileBuffer->Left == 0) {
ReadSize = FileBuffer->Allocated;
Status = gEfiShellProtocol->ReadFile (FileHandle, &ReadSize,
FileBuffer->Data);
if (EFI_ERROR (Status)) {
return Status;
}
if (ReadSize == 0) {
*BytesRead = 0;
return EFI_SUCCESS;
}
FileBuffer->Next = 0;
FileBuffer->Left = ReadSize;
}
*BytesRead = 1;
*Byte = FileBuffer->Data[FileBuffer->Next];
FileBuffer->Next++;
FileBuffer->Left--;
return EFI_SUCCESS;
}
/**
Function for 'comp' command.
@param[in] ImageHandle Handle to the Image (NULL if Internal).
@param[in] SystemTable Pointer to the System Table (NULL if Internal).
**/
SHELL_STATUS
EFIAPI
ShellCommandRunComp (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
LIST_ENTRY *Package;
CHAR16 *ProblemParam;
CHAR16 *FileName1;
CHAR16 *FileName2;
CONST CHAR16 *TempParam;
SHELL_STATUS ShellStatus;
SHELL_FILE_HANDLE FileHandle1;
SHELL_FILE_HANDLE FileHandle2;
UINT64 Size1;
UINT64 Size2;
UINT64 DifferentBytes;
UINT64 DifferentCount;
UINT8 DiffPointNumber;
UINT8 OneByteFromFile1;
UINT8 OneByteFromFile2;
UINT8 *DataFromFile1;
UINT8 *DataFromFile2;
FILE_BUFFER FileBuffer1;
FILE_BUFFER FileBuffer2;
UINTN InsertPosition1;
UINTN InsertPosition2;
UINTN DataSizeFromFile1;
UINTN DataSizeFromFile2;
UINTN TempAddress;
UINTN Index;
UINTN DiffPointAddress;
READ_STATUS ReadStatus;
ShellStatus = SHELL_SUCCESS;
Status = EFI_SUCCESS;
FileName1 = NULL;
FileName2 = NULL;
FileHandle1 = NULL;
FileHandle2 = NULL;
DataFromFile1 = NULL;
DataFromFile2 = NULL;
ReadStatus = OutOfDiffPoint;
DifferentCount = 10;
DifferentBytes = 4;
DiffPointNumber = 0;
InsertPosition1 = 0;
InsertPosition2 = 0;
TempAddress = 0;
DiffPointAddress = 0;
//
// initialize the shell lib (we must be in non-auto-init...)
//
Status = ShellInitialize();
ASSERT_EFI_ERROR(Status);
Status = CommandInit();
ASSERT_EFI_ERROR(Status);
//
// parse the command line
//
Status = ShellCommandLineParse (ParamList, &Package, &ProblemParam, TRUE);
if (EFI_ERROR(Status)) {
if (Status == EFI_VOLUME_CORRUPTED && ProblemParam != NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM), gShellDebug1HiiHandle, L"comp", ProblemParam);
FreePool(ProblemParam);
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
ASSERT(FALSE);
}
} else {
if (ShellCommandLineGetCount(Package) > 3) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_MANY), gShellDebug1HiiHandle, L"comp");
ShellStatus = SHELL_INVALID_PARAMETER;
} else if (ShellCommandLineGetCount(Package) < 3) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_TOO_FEW), gShellDebug1HiiHandle, L"comp");
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
TempParam = ShellCommandLineGetRawValue(Package, 1);
ASSERT(TempParam != NULL);
FileName1 = ShellFindFilePath(TempParam);
if (FileName1 == NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_FILE_FIND_FAIL), gShellDebug1HiiHandle, L"comp", TempParam);
ShellStatus = SHELL_NOT_FOUND;
} else {
Status = ShellOpenFileByName(FileName1, &FileHandle1, EFI_FILE_MODE_READ, 0);
if (EFI_ERROR(Status)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_OPEN_FAIL), gShellDebug1HiiHandle, L"comp", TempParam);
ShellStatus = SHELL_NOT_FOUND;
}
}
TempParam = ShellCommandLineGetRawValue(Package, 2);
ASSERT(TempParam != NULL);
FileName2 = ShellFindFilePath(TempParam);
if (FileName2 == NULL) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_FILE_FIND_FAIL), gShellDebug1HiiHandle, L"comp", TempParam);
ShellStatus = SHELL_NOT_FOUND;
} else {
Status = ShellOpenFileByName(FileName2, &FileHandle2, EFI_FILE_MODE_READ, 0);
if (EFI_ERROR(Status)) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_GEN_FILE_OPEN_FAIL), gShellDebug1HiiHandle, L"comp", TempParam);
ShellStatus = SHELL_NOT_FOUND;
}
}
if (ShellStatus == SHELL_SUCCESS) {
Status = gEfiShellProtocol->GetFileSize(FileHandle1, &Size1);
ASSERT_EFI_ERROR(Status);
Status = gEfiShellProtocol->GetFileSize(FileHandle2, &Size2);
ASSERT_EFI_ERROR(Status);
if (ShellCommandLineGetFlag (Package, L"-n")) {
TempParam = ShellCommandLineGetValue (Package, L"-n");
if (TempParam == NULL) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_VALUE), gShellDebug1HiiHandle, L"comp", L"-n");
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
if (gUnicodeCollation->StriColl (gUnicodeCollation, (CHAR16 *)TempParam, L"all") == 0) {
DifferentCount = MAX_UINTN;
} else {
Status = ShellConvertStringToUint64 (TempParam, &DifferentCount, FALSE, TRUE);
if (EFI_ERROR(Status) || DifferentCount == 0) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM_VAL), gShellDebug1HiiHandle, L"comp", TempParam, L"-n");
ShellStatus = SHELL_INVALID_PARAMETER;
}
}
}
}
if (ShellCommandLineGetFlag (Package, L"-s")) {
TempParam = ShellCommandLineGetValue (Package, L"-s");
if (TempParam == NULL) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_NO_VALUE), gShellDebug1HiiHandle, L"comp", L"-s");
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
Status = ShellConvertStringToUint64 (TempParam, &DifferentBytes, FALSE, TRUE);
if (EFI_ERROR(Status) || DifferentBytes == 0) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_GEN_PROBLEM_VAL), gShellDebug1HiiHandle, L"comp", TempParam, L"-s");
ShellStatus = SHELL_INVALID_PARAMETER;
} else {
if (DifferentBytes > MAX (Size1, Size2)) {
DifferentBytes = MAX (Size1, Size2);
}
}
}
}
}
if (ShellStatus == SHELL_SUCCESS) {
DataFromFile1 = AllocateZeroPool ((UINTN)DifferentBytes);
DataFromFile2 = AllocateZeroPool ((UINTN)DifferentBytes);
FileBufferInit (&FileBuffer1);
FileBufferInit (&FileBuffer2);
if (DataFromFile1 == NULL || DataFromFile2 == NULL ||
FileBuffer1.Data == NULL || FileBuffer2.Data == NULL) {
ShellStatus = SHELL_OUT_OF_RESOURCES;
SHELL_FREE_NON_NULL (DataFromFile1);
SHELL_FREE_NON_NULL (DataFromFile2);
FileBufferUninit (&FileBuffer1);
FileBufferUninit (&FileBuffer2);
}
}
if (ShellStatus == SHELL_SUCCESS) {
while (DiffPointNumber < DifferentCount) {
DataSizeFromFile1 = 1;
DataSizeFromFile2 = 1;
OneByteFromFile1 = 0;
OneByteFromFile2 = 0;
Status = FileBufferReadByte (FileHandle1, &FileBuffer1,
&DataSizeFromFile1, &OneByteFromFile1);
ASSERT_EFI_ERROR (Status);
Status = FileBufferReadByte (FileHandle2, &FileBuffer2,
&DataSizeFromFile2, &OneByteFromFile2);
ASSERT_EFI_ERROR (Status);
TempAddress++;
//
// 1.When end of file and no chars in DataFromFile buffer, then break while.
// 2.If no more char in File1 or File2, The ReadStatus is InPrevDiffPoint forever.
// So the previous different point is the last one, then break the while block.
//
if ( (DataSizeFromFile1 == 0 && InsertPosition1 == 0 && DataSizeFromFile2 == 0 && InsertPosition2 == 0) ||
(ReadStatus == InPrevDiffPoint && (DataSizeFromFile1 == 0 || DataSizeFromFile2 == 0))
) {
break;
}
if (ReadStatus == OutOfDiffPoint) {
if (OneByteFromFile1 != OneByteFromFile2) {
ReadStatus = InDiffPoint;
DiffPointAddress = TempAddress;
if (DataSizeFromFile1 == 1) {
DataFromFile1[InsertPosition1++] = OneByteFromFile1;
}
if (DataSizeFromFile2 == 1) {
DataFromFile2[InsertPosition2++] = OneByteFromFile2;
}
}
} else if (ReadStatus == InDiffPoint) {
if (DataSizeFromFile1 == 1) {
DataFromFile1[InsertPosition1++] = OneByteFromFile1;
}
if (DataSizeFromFile2 == 1) {
DataFromFile2[InsertPosition2++] = OneByteFromFile2;
}
} else if (ReadStatus == InPrevDiffPoint) {
if (OneByteFromFile1 == OneByteFromFile2) {
ReadStatus = OutOfDiffPoint;
}
}
//
// ReadStatus should be always equal InDiffPoint.
//
if ( InsertPosition1 == DifferentBytes ||
InsertPosition2 == DifferentBytes ||
(DataSizeFromFile1 == 0 && DataSizeFromFile2 == 0)
) {
ShellPrintHiiEx (-1, -1, NULL, STRING_TOKEN (STR_COMP_DIFFERENCE_POINT), gShellDebug1HiiHandle, ++DiffPointNumber);
PrintDifferentPoint (FileName1, L"File1", DataFromFile1, InsertPosition1, DiffPointAddress, DifferentBytes);
PrintDifferentPoint (FileName2, L"File2", DataFromFile2, InsertPosition2, DiffPointAddress, DifferentBytes);
//
// One of two buffuers is empty, it means this is the last different point.
//
if (InsertPosition1 == 0 || InsertPosition2 == 0) {
break;
}
for (Index = 1; Index < InsertPosition1 && Index < InsertPosition2; Index++) {
if (DataFromFile1[Index] == DataFromFile2[Index]) {
ReadStatus = OutOfDiffPoint;
break;
}
}
if (ReadStatus == OutOfDiffPoint) {
//
// Try to find a new different point in the rest of DataFromFile.
//
for (; Index < MAX (InsertPosition1,InsertPosition2); Index++) {
if (DataFromFile1[Index] != DataFromFile2[Index]) {
ReadStatus = InDiffPoint;
DiffPointAddress += Index;
break;
}
}
} else {
//
// Doesn't find a new different point, still in the same different point.
//
ReadStatus = InPrevDiffPoint;
}
CopyMem (DataFromFile1, DataFromFile1 + Index, InsertPosition1 - Index);
CopyMem (DataFromFile2, DataFromFile2 + Index, InsertPosition2 - Index);
SetMem (DataFromFile1 + InsertPosition1 - Index, (UINTN)DifferentBytes - InsertPosition1 + Index, 0);
SetMem (DataFromFile2 + InsertPosition2 - Index, (UINTN)DifferentBytes - InsertPosition2 + Index, 0);
InsertPosition1 -= Index;
InsertPosition2 -= Index;
}
}
SHELL_FREE_NON_NULL (DataFromFile1);
SHELL_FREE_NON_NULL (DataFromFile2);
FileBufferUninit (&FileBuffer1);
FileBufferUninit (&FileBuffer2);
if (DiffPointNumber == 0) {
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_COMP_FOOTER_PASS), gShellDebug1HiiHandle);
} else {
ShellStatus = SHELL_NOT_EQUAL;
ShellPrintHiiEx(-1, -1, NULL, STRING_TOKEN (STR_COMP_FOOTER_FAIL), gShellDebug1HiiHandle);
}
}
}
ShellCommandLineFreeVarList (Package);
}
SHELL_FREE_NON_NULL(FileName1);
SHELL_FREE_NON_NULL(FileName2);
if (FileHandle1 != NULL) {
gEfiShellProtocol->CloseFile(FileHandle1);
}
if (FileHandle2 != NULL) {
gEfiShellProtocol->CloseFile(FileHandle2);
}
return (ShellStatus);
}
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