mirror of https://github.com/acidanthera/audk.git
396 lines
13 KiB
C
396 lines
13 KiB
C
/** @file
|
|
Memory-only library functions with no library constructor/destructor
|
|
|
|
Copyright (c) 2006, Intel Corporation
|
|
All rights reserved. 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.
|
|
|
|
Module Name: BaseMemoryLib.h
|
|
|
|
**/
|
|
|
|
#ifndef __BASE_MEMORY_LIB__
|
|
#define __BASE_MEMORY_LIB__
|
|
|
|
/**
|
|
Copy Length bytes from Source to Destination.
|
|
|
|
This function copies Length bytes from SourceBuffer to DestinationBuffer, and
|
|
returns DestinationBuffer. The implementation must be reentrant, and it must
|
|
handle the case where SourceBuffer overlaps DestinationBuffer.
|
|
|
|
If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then
|
|
ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().
|
|
|
|
@param Destination Target of copy
|
|
@param Source Place to copy from
|
|
@param Length Number of bytes to copy
|
|
|
|
@return Destination
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
CopyMem (
|
|
OUT VOID *DestinationBuffer,
|
|
IN CONST VOID *SourceBuffer,
|
|
IN UINTN Length
|
|
);
|
|
|
|
/**
|
|
Set Buffer to Value for Size bytes.
|
|
|
|
This function fills Length bytes of Buffer with Value, and returns Buffer.
|
|
|
|
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@param Buffer Memory to set.
|
|
@param Size Number of bytes to set
|
|
@param Value Value of the set operation.
|
|
|
|
@return Buffer
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
SetMem (
|
|
OUT VOID *Buffer,
|
|
IN UINTN Length,
|
|
IN UINT8 Value
|
|
);
|
|
|
|
/**
|
|
Fills a target buffer with a 16-bit value, and returns the target buffer.
|
|
|
|
This function fills Length bytes of Buffer with the 16-bit value specified by
|
|
Value, and returns Buffer. Value is repeated every 16-bits in for Length
|
|
bytes of Buffer.
|
|
|
|
If Buffer is NULL and Length > 0, then ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
If Buffer is not aligned on a 16-bit boundary, then ASSERT().
|
|
If Length is not aligned on a 16-bit boundary, then ASSERT().
|
|
|
|
@param Buffer Pointer to the target buffer to fill.
|
|
@param Length Number of bytes in Buffer to fill.
|
|
@param Value Value with which to fill Length bytes of Buffer.
|
|
|
|
@return Buffer
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
SetMem16 (
|
|
OUT VOID *Buffer,
|
|
IN UINTN Length,
|
|
IN UINT16 Value
|
|
);
|
|
|
|
/**
|
|
Fills a target buffer with a 32-bit value, and returns the target buffer.
|
|
|
|
This function fills Length bytes of Buffer with the 32-bit value specified by
|
|
Value, and returns Buffer. Value is repeated every 32-bits in for Length
|
|
bytes of Buffer.
|
|
|
|
If Buffer is NULL and Length > 0, then ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
If Buffer is not aligned on a 32-bit boundary, then ASSERT().
|
|
If Length is not aligned on a 32-bit boundary, then ASSERT().
|
|
|
|
@param Buffer Pointer to the target buffer to fill.
|
|
@param Length Number of bytes in Buffer to fill.
|
|
@param Value Value with which to fill Length bytes of Buffer.
|
|
|
|
@return Buffer
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
SetMem32 (
|
|
OUT VOID *Buffer,
|
|
IN UINTN Length,
|
|
IN UINT32 Value
|
|
);
|
|
|
|
/**
|
|
Fills a target buffer with a 64-bit value, and returns the target buffer.
|
|
|
|
This function fills Length bytes of Buffer with the 64-bit value specified by
|
|
Value, and returns Buffer. Value is repeated every 64-bits in for Length
|
|
bytes of Buffer.
|
|
|
|
If Buffer is NULL and Length > 0, then ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
If Buffer is not aligned on a 64-bit boundary, then ASSERT().
|
|
If Length is not aligned on a 64-bit boundary, then ASSERT().
|
|
|
|
@param Buffer Pointer to the target buffer to fill.
|
|
@param Length Number of bytes in Buffer to fill.
|
|
@param Value Value with which to fill Length bytes of Buffer.
|
|
|
|
@return Buffer
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
SetMem64 (
|
|
OUT VOID *Buffer,
|
|
IN UINTN Length,
|
|
IN UINT64 Value
|
|
);
|
|
|
|
/**
|
|
Set Buffer to 0 for Size bytes.
|
|
|
|
This function fills Length bytes of Buffer with zeros, and returns Buffer.
|
|
|
|
If Buffer is NULL and Length > 0, then ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@param Buffer Memory to set.
|
|
@param Size Number of bytes to set
|
|
|
|
@return Buffer
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
ZeroMem (
|
|
OUT VOID *Buffer,
|
|
IN UINTN Length
|
|
);
|
|
|
|
/**
|
|
Compares two memory buffers of a given length.
|
|
|
|
This function compares Length bytes of SourceBuffer to Length bytes of
|
|
DestinationBuffer. If all Length bytes of the two buffers are identical, then
|
|
0 is returned. Otherwise, the value returned is the first mismatched byte in
|
|
SourceBuffer subtracted from the first mismatched byte in DestinationBuffer.
|
|
|
|
If DestinationBuffer is NULL and Length > 0, then ASSERT().
|
|
If SourceBuffer is NULL and Length > 0, then ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then
|
|
ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().
|
|
|
|
@param DestinationBuffer First memory buffer
|
|
@param SourceBuffer Second memory buffer
|
|
@param Length Length of DestinationBuffer and SourceBuffer memory
|
|
regions to compare
|
|
|
|
@retval 0 if DestinationBuffer == SourceBuffer
|
|
@retval Non-zero if DestinationBuffer != SourceBuffer
|
|
|
|
**/
|
|
INTN
|
|
EFIAPI
|
|
CompareMem (
|
|
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.
|
|
|
|
This function searches target the buffer specified by Buffer and Length from
|
|
the lowest address to the highest address for an 8-bit value that matches
|
|
Value. If a match is found, then a pointer to the matching byte in the target
|
|
buffer is returned. If no match is found, then NULL is returned. If Length is
|
|
0, then NULL is returned.
|
|
|
|
If Buffer is NULL, then ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@param Buffer Pointer to the target buffer to scan.
|
|
@param Length Number of bytes in Buffer to scan.
|
|
@param Value Value to search for in the target buffer.
|
|
|
|
@return Pointer to the first occurrence or NULL if not found.
|
|
@retval NULL if Length == 0 or Value was not found.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
ScanMem8 (
|
|
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.
|
|
|
|
This function searches target the buffer specified by Buffer and Length from
|
|
the lowest address to the highest address at 16-bit increments for a 16-bit
|
|
value that matches Value. If a match is found, then a pointer to the matching
|
|
value in the target buffer is returned. If no match is found, then NULL is
|
|
returned. If Length is 0, then NULL is returned.
|
|
|
|
If Buffer is NULL, then ASSERT().
|
|
If Buffer is not aligned on a 16-bit boundary, then ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@param Buffer Pointer to the target buffer to scan.
|
|
@param Length Number of bytes in Buffer to scan.
|
|
@param Value Value to search for in the target buffer.
|
|
|
|
@return Pointer to the first occurrence.
|
|
@retval NULL if Length == 0 or Value was not found.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
ScanMem16 (
|
|
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.
|
|
|
|
This function searches target the buffer specified by Buffer and Length from
|
|
the lowest address to the highest address at 32-bit increments for a 32-bit
|
|
value that matches Value. If a match is found, then a pointer to the matching
|
|
value in the target buffer is returned. If no match is found, then NULL is
|
|
returned. If Length is 0, then NULL is returned.
|
|
|
|
If Buffer is NULL, then ASSERT().
|
|
If Buffer is not aligned on a 32-bit boundary, then ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@param Buffer Pointer to the target buffer to scan.
|
|
@param Length Number of bytes in Buffer to scan.
|
|
@param Value Value to search for in the target buffer.
|
|
|
|
@return Pointer to the first occurrence or NULL if not found.
|
|
@retval NULL if Length == 0 or Value was not found.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
ScanMem32 (
|
|
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.
|
|
|
|
This function searches target the buffer specified by Buffer and Length from
|
|
the lowest address to the highest address at 64-bit increments for a 64-bit
|
|
value that matches Value. If a match is found, then a pointer to the matching
|
|
value in the target buffer is returned. If no match is found, then NULL is
|
|
returned. If Length is 0, then NULL is returned.
|
|
|
|
If Buffer is NULL, then ASSERT().
|
|
If Buffer is not aligned on a 64-bit boundary, then ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@param Buffer Pointer to the target buffer to scan.
|
|
@param Length Number of bytes in Buffer to scan.
|
|
@param Value Value to search for in the target buffer.
|
|
|
|
@return Pointer to the first occurrence or NULL if not found.
|
|
@retval NULL if Length == 0 or Value was not found.
|
|
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
ScanMem64 (
|
|
IN CONST VOID *Buffer,
|
|
IN UINTN Length,
|
|
IN UINT64 Value
|
|
);
|
|
|
|
/**
|
|
This function copies a source GUID to a destination GUID.
|
|
|
|
This function copies the contents of the 128-bit GUID specified by SourceGuid
|
|
to DestinationGuid, and returns DestinationGuid.
|
|
|
|
If DestinationGuid is NULL, then ASSERT().
|
|
If SourceGuid is NULL, then ASSERT().
|
|
|
|
@param DestinationGuid Pointer to the destination GUID.
|
|
@param SourceGuid Pointer to the source GUID.
|
|
|
|
@return DestinationGuid
|
|
|
|
**/
|
|
GUID *
|
|
EFIAPI
|
|
CopyGuid (
|
|
OUT GUID *DestinationGuid,
|
|
IN CONST GUID *SourceGuid
|
|
);
|
|
|
|
/**
|
|
Compares two GUIDs
|
|
|
|
This function compares Guid1 to Guid2. If the GUIDs are identical then TRUE
|
|
is returned. If there are any bit differences in the two GUIDs, then FALSE is
|
|
returned.
|
|
|
|
If Guid1 is NULL, then ASSERT().
|
|
If Guid2 is NULL, then ASSERT().
|
|
|
|
@param Guid1 guid to compare
|
|
@param Guid2 guid to compare
|
|
|
|
@retval TRUE if Guid1 == Guid2
|
|
@retval FALSE if Guid1 != Guid2
|
|
|
|
**/
|
|
BOOLEAN
|
|
EFIAPI
|
|
CompareGuid (
|
|
IN CONST GUID *Guid1,
|
|
IN CONST GUID *Guid2
|
|
);
|
|
|
|
/**
|
|
Scans a target buffer for a GUID, and returns a pointer to the matching GUID
|
|
in the target buffer.
|
|
|
|
This function searches target the buffer specified by Buffer and Length from
|
|
the lowest address to the highest address at 128-bit increments for the
|
|
128-bit GUID value that matches Guid. If a match is found, then a pointer to
|
|
the matching GUID in the target buffer is returned. If no match is found,
|
|
then NULL is returned. If Length is 0, then NULL is returned.
|
|
|
|
If Buffer is NULL, then ASSERT().
|
|
If Buffer is not aligned on a 64-bit boundary, then ASSERT().
|
|
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
|
|
|
|
@param Buffer Pointer to the target buffer to scan.
|
|
@param Length Number of bytes in Buffer to scan.
|
|
@param Guid Value to search for in the target buffer.
|
|
|
|
@return Pointer to the first occurrence.
|
|
@retval NULL if Length == 0 or Guid was not found.
|
|
**/
|
|
VOID *
|
|
EFIAPI
|
|
ScanGuid (
|
|
IN CONST VOID *Buffer,
|
|
IN UINTN Length,
|
|
IN CONST GUID *Guid
|
|
);
|
|
|
|
#endif
|