/** @file
Declaration of internal functions for Base Memory Library.
Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef __MEM_LIB_INTERNALS__
#define __MEM_LIB_INTERNALS__
#include <Uefi.h>
#include <Library/BaseMemoryLib.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
/**
Copies a source buffer to a destination buffer, and returns the destination buffer.
This function wraps the gBS->CopyMem().
@param DestinationBuffer The pointer to the destination buffer of the memory copy.
@param SourceBuffer The pointer to the source buffer of the memory copy.
@param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.
@return DestinationBuffer.
**/
VOID *
EFIAPI
InternalMemCopyMem (
OUT VOID *Destination,
IN CONST VOID *Source,
IN UINTN Length
);
/**
Fills a target buffer with a byte value, and returns the target buffer.
This function wraps the gBS->SetMem().
@param Buffer Memory to set.
@param Size The number of bytes to set.
@param Value Value of the set operation.
@return Buffer.
**/
VOID *
EFIAPI
InternalMemSetMem (
OUT VOID *Buffer,
IN UINTN Size,
IN UINT8 Value
);
/**
Fills a target buffer with a 16-bit value, and returns the target buffer.
@param Buffer The pointer to the target buffer to fill.
@param Length The count of 16-bit value to fill.
@param Value The value with which to fill Length bytes of Buffer.
@return Buffer
**/
VOID *
EFIAPI
InternalMemSetMem16 (
OUT VOID *Buffer,
IN UINTN Length,
IN UINT16 Value
);
/**
Fills a target buffer with a 32-bit value, and returns the target buffer.
@param Buffer The pointer to the target buffer to fill.
@param Length The count of 32-bit value to fill.
@param Value The value with which to fill Length bytes of Buffer.
@return Buffer
**/
VOID *
EFIAPI
InternalMemSetMem32 (
OUT VOID *Buffer,
IN UINTN Length,
IN UINT32 Value
);
/**
Fills a target buffer with a 64-bit value, and returns the target buffer.
@param Buffer The pointer to the target buffer to fill.
@param Length The count of 64-bit value to fill.
@param Value The value with which to fill Length bytes of Buffer.
@return Buffer
**/
VOID *
EFIAPI
InternalMemSetMem64 (
OUT VOID *Buffer,
IN UINTN Length,
IN UINT64 Value
);
/**
Set Buffer to 0 for Size bytes.
@param Buffer The memory to set.
@param Length The number of bytes to set
@return Buffer
**/
VOID *
EFIAPI
InternalMemZeroMem (
OUT VOID *Buffer,
IN UINTN Length
);
/**
Compares two memory buffers of a given length.
@param DestinationBuffer The first memory buffer
@param SourceBuffer The second memory buffer
@param Length The length of DestinationBuffer and SourceBuffer memory
regions to compare. Must be non-zero.
@return 0 All Length bytes of the two buffers are identical.
@retval Non-zero The first mismatched byte in SourceBuffer subtracted from the first
mismatched byte in DestinationBuffer.
**/
INTN
EFIAPI
InternalMemCompareMem (
IN CONST VOID *DestinationBuffer,
IN CONST VOID *SourceBuffer,
IN UINTN Length
);
/**
Scans a target buffer for an 8-bit value, and returns a pointer to the
matching 8-bit value in the target buffer.
@param Buffer The pointer to the target buffer to scan.
@param Length The count of 8-bit value to scan. Must be non-zero.
@param Value The value to search for in the target buffer.
@return The pointer to the first occurrence or NULL if not found.
**/
CONST VOID *
EFIAPI
InternalMemScanMem8 (
IN CONST VOID *Buffer,
IN UINTN Length,
IN UINT8 Value
);
/**
Scans a target buffer for a 16-bit value, and returns a pointer to the
matching 16-bit value in the target buffer.
@param Buffer The pointer to the target buffer to scan.
@param Length The count of 16-bit value to scan. Must be non-zero.
@param Value The value to search for in the target buffer.
@return The pointer to the first occurrence or NULL if not found.
**/
CONST VOID *
EFIAPI
InternalMemScanMem16 (
IN CONST VOID *Buffer,
IN UINTN Length,
IN UINT16 Value
);
/**
Scans a target buffer for a 32-bit value, and returns a pointer to the
matching 32-bit value in the target buffer.
@param Buffer The pointer to the target buffer to scan.
@param Length The count of 32-bit value to scan. Must be non-zero.
@param Value The value to search for in the target buffer.
@return The pointer to the first occurrence or NULL if not found.
**/
CONST VOID *
EFIAPI
InternalMemScanMem32 (
IN CONST VOID *Buffer,
IN UINTN Length,
IN UINT32 Value
);
/**
Scans a target buffer for a 64-bit value, and returns a pointer to the
matching 64-bit value in the target buffer.
@param Buffer The pointer to the target buffer to scan.
@param Length The count of 64-bit value to scan. Must be non-zero.
@param Value The value to search for in the target buffer.
@return The pointer to the first occurrence or NULL if not found.
**/
CONST VOID *
EFIAPI
InternalMemScanMem64 (
IN CONST VOID *Buffer,
IN UINTN Length,
IN UINT64 Value
);
/**
Checks whether the contents of a buffer are all zeros.
@param Buffer The pointer to the buffer to be checked.
@param Length The size of the buffer (in bytes) to be checked.
@retval TRUE Contents of the buffer are all zeros.
@retval FALSE Contents of the buffer are not all zeros.
**/
BOOLEAN
EFIAPI
InternalMemIsZeroBuffer (
IN CONST VOID *Buffer,
IN UINTN Length
);
#endif