+/** @file\r
+ Architecture Independent Base Memory Library Implementation.\r
+\r
+ Copyright (c) 2006, Intel Corporation<BR>\r
+ All rights reserved. This program and the accompanying materials\r
+ are licensed and made available under the terms and conditions of the BSD License\r
+ which accompanies this distribution. The full text of the license may be found at\r
+ http://opensource.org/licenses/bsd-license.php\r
+\r
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+ Module Name: MemLibGeneric.c\r
+\r
+ The following BaseMemoryLib instances share the same version of this file:\r
+\r
+ BaseMemoryLib\r
+ PeiMemoryLib\r
+ DxeMemoryLib\r
+\r
+**/\r
+\r
+#include "MemLibInternals.h"\r
+\r
+/**\r
+ Fills a target buffer with a 16-bit value, and returns the target buffer.\r
+\r
+ @param Buffer Pointer to the target buffer to fill.\r
+ @param Length Number of bytes in Buffer to fill.\r
+ @param Value Value with which to fill Length bytes of Buffer.\r
+\r
+ @return Buffer\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+InternalMemSetMem16 (\r
+ OUT VOID *Buffer,\r
+ IN UINTN Length,\r
+ IN UINT16 Value\r
+ )\r
+{\r
+ do {\r
+ ((UINT16*)Buffer)[--Length] = Value;\r
+ } while (Length != 0);\r
+ return Buffer;\r
+}\r
+\r
+/**\r
+ Fills a target buffer with a 32-bit value, and returns the target buffer.\r
+\r
+ @param Buffer Pointer to the target buffer to fill.\r
+ @param Length Number of bytes in Buffer to fill.\r
+ @param Value Value with which to fill Length bytes of Buffer.\r
+\r
+ @return Buffer\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+InternalMemSetMem32 (\r
+ OUT VOID *Buffer,\r
+ IN UINTN Length,\r
+ IN UINT32 Value\r
+ )\r
+{\r
+ do {\r
+ ((UINT32*)Buffer)[--Length] = Value;\r
+ } while (Length != 0);\r
+ return Buffer;\r
+}\r
+\r
+/**\r
+ Fills a target buffer with a 64-bit value, and returns the target buffer.\r
+\r
+ @param Buffer Pointer to the target buffer to fill.\r
+ @param Length Number of bytes in Buffer to fill.\r
+ @param Value Value with which to fill Length bytes of Buffer.\r
+\r
+ @return Buffer\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+InternalMemSetMem64 (\r
+ OUT VOID *Buffer,\r
+ IN UINTN Length,\r
+ IN UINT64 Value\r
+ )\r
+{\r
+ do {\r
+ ((UINT64*)Buffer)[--Length] = Value;\r
+ } while (Length != 0);\r
+ return Buffer;\r
+}\r
+\r
+/**\r
+ Set Buffer to 0 for Size bytes.\r
+\r
+ @param Buffer Memory to set.\r
+ @param Size Number of bytes to set\r
+\r
+ @return Buffer\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+InternalMemZeroMem (\r
+ OUT VOID *Buffer,\r
+ IN UINTN Length\r
+ )\r
+{\r
+ return InternalMemSetMem (Buffer, Length, 0);\r
+}\r
+\r
+/**\r
+ Compares two memory buffers of a given length.\r
+\r
+ @param DestinationBuffer First memory buffer\r
+ @param SourceBuffer Second memory buffer\r
+ @param Length Length of DestinationBuffer and SourceBuffer memory\r
+ regions to compare. Must be non-zero.\r
+\r
+ @retval 0 if MemOne == MemTwo\r
+\r
+**/\r
+INTN\r
+EFIAPI\r
+InternalMemCompareMem (\r
+ IN CONST VOID *DestinationBuffer,\r
+ IN CONST VOID *SourceBuffer,\r
+ IN UINTN Length\r
+ )\r
+{\r
+ while ((--Length != 0) &&\r
+ (*(INT8*)DestinationBuffer == *(INT8*)SourceBuffer)) {\r
+ DestinationBuffer = (INT8*)DestinationBuffer + 1;\r
+ SourceBuffer = (INT8*)SourceBuffer + 1;\r
+ }\r
+ return (INTN)*(UINT8*)DestinationBuffer - (INTN)*(UINT8*)SourceBuffer;\r
+}\r
+\r
+/**\r
+ Scans a target buffer for an 8-bit value, and returns a pointer to the\r
+ matching 8-bit value in the target buffer.\r
+\r
+ @param Buffer Pointer to the target buffer to scan.\r
+ @param Length Number of bytes in Buffer to scan. Must be non-zero.\r
+ @param Value Value to search for in the target buffer.\r
+\r
+ @return Pointer to the first occurrence or NULL if not found.\r
+\r
+**/\r
+CONST VOID *\r
+EFIAPI\r
+InternalMemScanMem8 (\r
+ IN CONST VOID *Buffer,\r
+ IN UINTN Length,\r
+ IN UINT8 Value\r
+ )\r
+{\r
+ CONST UINT8 *Pointer;\r
+\r
+ Pointer = (CONST UINT8*)Buffer;\r
+ do {\r
+ if (*(Pointer++) == Value) {\r
+ return Pointer;\r
+ }\r
+ } while (--Length != 0);\r
+ return NULL;\r
+}\r
+\r
+/**\r
+ Scans a target buffer for a 16-bit value, and returns a pointer to the\r
+ matching 16-bit value in the target buffer.\r
+\r
+ @param Buffer Pointer to the target buffer to scan.\r
+ @param Length Number of bytes in Buffer to scan. Must be non-zero.\r
+ @param Value Value to search for in the target buffer.\r
+\r
+ @return Pointer to the first occurrence or NULL if not found.\r
+\r
+**/\r
+CONST VOID *\r
+EFIAPI\r
+InternalMemScanMem16 (\r
+ IN CONST VOID *Buffer,\r
+ IN UINTN Length,\r
+ IN UINT16 Value\r
+ )\r
+{\r
+ CONST UINT16 *Pointer;\r
+\r
+ Pointer = (CONST UINT16*)Buffer;\r
+ do {\r
+ if (*(Pointer++) == Value) {\r
+ return Pointer;\r
+ }\r
+ } while (--Length != 0);\r
+ return NULL;\r
+}\r
+\r
+/**\r
+ Scans a target buffer for a 32-bit value, and returns a pointer to the\r
+ matching 32-bit value in the target buffer.\r
+\r
+ @param Buffer Pointer to the target buffer to scan.\r
+ @param Length Number of bytes in Buffer to scan. Must be non-zero.\r
+ @param Value Value to search for in the target buffer.\r
+\r
+ @return Pointer to the first occurrence or NULL if not found.\r
+\r
+**/\r
+CONST VOID *\r
+EFIAPI\r
+InternalMemScanMem32 (\r
+ IN CONST VOID *Buffer,\r
+ IN UINTN Length,\r
+ IN UINT32 Value\r
+ )\r
+{\r
+ CONST UINT32 *Pointer;\r
+\r
+ Pointer = (CONST UINT32*)Buffer;\r
+ do {\r
+ if (*(Pointer++) == Value) {\r
+ return Pointer;\r
+ }\r
+ } while (--Length != 0);\r
+ return NULL;\r
+}\r
+\r
+/**\r
+ Scans a target buffer for a 64-bit value, and returns a pointer to the\r
+ matching 64-bit value in the target buffer.\r
+\r
+ @param Buffer Pointer to the target buffer to scan.\r
+ @param Length Number of bytes in Buffer to scan. Must be non-zero.\r
+ @param Value Value to search for in the target buffer.\r
+\r
+ @return Pointer to the first occurrence or NULL if not found.\r
+\r
+**/\r
+CONST VOID *\r
+EFIAPI\r
+InternalMemScanMem64 (\r
+ IN CONST VOID *Buffer,\r
+ IN UINTN Length,\r
+ IN UINT64 Value\r
+ )\r
+{\r
+ CONST UINT64 *Pointer;\r
+\r
+ Pointer = (CONST UINT64*)Buffer;\r
+ do {\r
+ if (*(Pointer++) == Value) {\r
+ return Pointer;\r
+ }\r
+ } while (--Length != 0);\r
+ return NULL;\r
+}\r
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