diff options
Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/MemLibGeneric.c')
| -rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/MemLibGeneric.c | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/MemLibGeneric.c b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/MemLibGeneric.c new file mode 100644 index 0000000..284a492 --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/MemLibGeneric.c @@ -0,0 +1,261 @@ +/*++ + +Copyright (c) 2004 - 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: + + MemLibGeneric.c + +Abstract: + + Architecture Independent Base Memory Library Implementation. + +--*/ + +#include "BaseMemoryLibInternal.h" + +/** + 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 + ) +{ + do { + ((UINT16*)Buffer)[--Length] = Value; + } while (Length != 0); + return Buffer; +} + +/** + 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 + ) +{ + do { + ((UINT32*)Buffer)[--Length] = Value; + } while (Length != 0); + return Buffer; +} + +/** + 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 + ) +{ + do { + ((UINT64*)Buffer)[--Length] = Value; + } while (Length != 0); + return Buffer; +} + +/** + 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 + ) +{ + return InternalMemSetMem (Buffer, Length, 0); +} + +/** + 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 + ) +{ + while ((--Length != 0) && + (*(INT8*)DestinationBuffer == *(INT8*)SourceBuffer)) { + DestinationBuffer = (INT8*)DestinationBuffer + 1; + SourceBuffer = (INT8*)SourceBuffer + 1; + } + return (INTN)*(UINT8*)DestinationBuffer - (INTN)*(UINT8*)SourceBuffer; +} + +/** + 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 + ) +{ + CONST UINT8 *Pointer; + + Pointer = (CONST UINT8*)Buffer; + do { + if (*(Pointer++) == Value) { + return Pointer; + } + } while (--Length != 0); + return NULL; +} + +/** + 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 + ) +{ + CONST UINT16 *Pointer; + + Pointer = (CONST UINT16*)Buffer; + do { + if (*(Pointer++) == Value) { + return Pointer; + } + } while (--Length != 0); + return NULL; +} + +/** + 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 + ) +{ + CONST UINT32 *Pointer; + + Pointer = (CONST UINT32*)Buffer; + do { + if (*(Pointer++) == Value) { + return Pointer; + } + } while (--Length != 0); + return NULL; +} + +/** + 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 + ) +{ + CONST UINT64 *Pointer; + + Pointer = (CONST UINT64*)Buffer; + do { + if (*(Pointer++) == Value) { + return Pointer; + } + } while (--Length != 0); + return NULL; +} |