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/** @file
Wrapper functions for Base Memory Library.
Copyright (c) 2006, Intel Corporation<BR>
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: MemLibWrapper.c
The following BaseMemoryLib instances share the same version of this file:
BaseMemoryLib
BaseMemoryLibMmx
BaseMemoryLibSse2
BaseMemoryLibRepStr
PeiMemoryLib
UefiMemoryLib
**/
/**
Copy Length bytes from Source to Destination.
@param Destination Target of copy
@param Source Place to copy from
@param Length Number of bytes to copy
@return Destination
**/
VOID *
EFIAPI
InternalMemCopyMem (
OUT VOID *DestinationBuffer,
IN CONST VOID *SourceBuffer,
IN UINTN Length
);
/**
Set Buffer to Value for Size bytes.
@param Buffer Memory to set.
@param Size Number of bytes to set
@param Value Value of the set operation.
@return Buffer
**/
VOID *
EFIAPI
InternalMemSetMem (
OUT VOID *Buffer,
IN UINTN Length,
IN UINT8 Value
);
/**
Fills a target buffer with a 16-bit value, and returns the target buffer.
@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
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 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
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 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
InternalMemSetMem64 (
OUT VOID *Buffer,
IN UINTN Length,
IN UINT64 Value
);
/**
Set Buffer to 0 for Size bytes.
@param Buffer Memory to set.
@param Size 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 First memory buffer
@param SourceBuffer Second memory buffer
@param Length Length of DestinationBuffer and SourceBuffer memory
regions to compare. Must be non-zero.
@retval 0 if MemOne == MemTwo
**/
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 Pointer to the target buffer to scan.
@param Length Number of bytes in Buffer to scan. Must be non-zero.
@param Value Value to search for in the target buffer.
@return 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 Pointer to the target buffer to scan.
@param Length Number of bytes in Buffer to scan. Must be non-zero.
@param Value Value to search for in the target buffer.
@return 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 Pointer to the target buffer to scan.
@param Length Number of bytes in Buffer to scan. Must be non-zero.
@param Value Value to search for in the target buffer.
@return 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 Pointer to the target buffer to scan.
@param Length Number of bytes in Buffer to scan. Must be non-zero.
@param Value Value to search for in the target buffer.
@return Pointer to the first occurrence or NULL if not found.
**/
CONST VOID *
EFIAPI
InternalMemScanMem64 (
IN CONST VOID *Buffer,
IN UINTN Length,
IN UINT64 Value
);
/**
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 *Destination,
IN CONST VOID *Source,
IN UINTN Length
)
{
ASSERT (Length <= MAX_ADDRESS - (UINTN)Destination + 1);
ASSERT (Length <= MAX_ADDRESS - (UINTN)Source + 1);
return InternalMemCopyMem (Destination, Source, 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 (
IN VOID *Buffer,
IN UINTN Size,
IN UINT8 Value
)
{
ASSERT (Size <= MAX_ADDRESS - (UINTN)Buffer + 1);
return InternalMemSetMem (Buffer, Size, 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
)
{
ASSERT (Buffer != NULL);
ASSERT (Length <= MAX_ADDRESS - (UINTN)Buffer + 1);
ASSERT ((((UINTN)Buffer) & 1) != 0);
ASSERT ((Length & 1) != 0);
if ((Length /= sizeof (Value)) == 0) {
return Buffer;
}
return InternalMemSetMem16 (Buffer, Length, 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
)
{
ASSERT (Buffer != NULL);
ASSERT (Length <= MAX_ADDRESS - (UINTN)Buffer + 1);
ASSERT ((((UINTN)Buffer) & 1) != 0);
ASSERT ((Length & 1) != 0);
if ((Length /= sizeof (Value)) == 0) {
return Buffer;
}
return InternalMemSetMem32 (Buffer, Length, 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
)
{
ASSERT (Buffer != NULL);
ASSERT (Length <= MAX_ADDRESS - (UINTN)Buffer + 1);
ASSERT ((((UINTN)Buffer) & 1) != 0);
ASSERT ((Length & 1) != 0);
if ((Length /= sizeof (Value)) == 0) {
return Buffer;
}
return InternalMemSetMem64 (Buffer, Length, 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 (
IN VOID *Buffer,
IN UINTN Size
)
{
ASSERT (Buffer != NULL);
return InternalMemSetMem (Buffer, Size, 0);
}
/**
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
)
{
ASSERT (DestinationBuffer != NULL);
ASSERT (SourceBuffer != NULL);
ASSERT (Length <= MAX_ADDRESS - (UINTN)DestinationBuffer + 1);
ASSERT (Length <= MAX_ADDRESS - (UINTN)SourceBuffer + 1);
if (Length == 0) {
return 0;
}
return InternalMemCompareMem (DestinationBuffer, SourceBuffer, 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
)
{
ASSERT (Buffer != NULL);
ASSERT (Length <= MAX_ADDRESS + (UINTN)Buffer + 1);
if ((Length /= sizeof (Value)) == 0) {
return NULL;
}
return (VOID*)InternalMemScanMem8 (Buffer, Length, 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
)
{
ASSERT (Buffer != NULL);
ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);
ASSERT (Length <= MAX_ADDRESS + (UINTN)Buffer + 1);
if ((Length /= sizeof (Value)) == 0) {
return NULL;
}
return (VOID*)InternalMemScanMem16 (Buffer, Length, 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
)
{
ASSERT (Buffer != NULL);
ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);
ASSERT (Length <= MAX_ADDRESS + (UINTN)Buffer + 1);
if ((Length /= sizeof (Value)) == 0) {
return NULL;
}
return (VOID*)InternalMemScanMem32 (Buffer, Length, 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
)
{
ASSERT (Buffer != NULL);
ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);
ASSERT (Length <= MAX_ADDRESS + (UINTN)Buffer + 1);
if ((Length /= sizeof (Value)) == 0) {
return NULL;
}
return (VOID*)InternalMemScanMem64 (Buffer, Length, Value);
}
|
