9344f09215
https://bugzilla.tianocore.org/show_bug.cgi?id=1373 Replace BSD 2-Clause License with BSD+Patent License. This change is based on the following emails: https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html RFCs with detailed process for the license change: V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/** @file
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Architecture Independent Base Memory Library Implementation.
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The following BaseMemoryLib instances contain the same copy of this file:
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BaseMemoryLib
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PeiMemoryLib
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UefiMemoryLib
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Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "../MemLibInternals.h"
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/**
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Scans a target buffer for a 16-bit value, and returns a pointer to the
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matching 16-bit value in the target buffer.
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@param Buffer The pointer to the target buffer to scan.
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@param Length The count of 16-bit value to scan. Must be non-zero.
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@param Value The value to search for in the target buffer.
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@return The pointer to the first occurrence, or NULL if not found.
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**/
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CONST VOID *
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EFIAPI
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InternalMemScanMem16 (
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IN CONST VOID *Buffer,
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IN UINTN Length,
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IN UINT16 Value
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)
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{
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CONST UINT16 *Pointer;
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Pointer = (CONST UINT16*)Buffer;
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do {
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if (*Pointer == Value) {
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return Pointer;
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}
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++Pointer;
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} while (--Length != 0);
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return NULL;
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}
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/**
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Scans a target buffer for a 32-bit value, and returns a pointer to the
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matching 32-bit value in the target buffer.
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@param Buffer The pointer to the target buffer to scan.
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@param Length The count of 32-bit value to scan. Must be non-zero.
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@param Value The value to search for in the target buffer.
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@return The pointer to the first occurrence, or NULL if not found.
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**/
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CONST VOID *
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EFIAPI
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InternalMemScanMem32 (
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IN CONST VOID *Buffer,
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IN UINTN Length,
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IN UINT32 Value
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)
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{
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CONST UINT32 *Pointer;
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Pointer = (CONST UINT32*)Buffer;
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do {
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if (*Pointer == Value) {
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return Pointer;
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}
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++Pointer;
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} while (--Length != 0);
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return NULL;
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}
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/**
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Scans a target buffer for a 64-bit value, and returns a pointer to the
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matching 64-bit value in the target buffer.
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@param Buffer The pointer to the target buffer to scan.
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@param Length The count of 64-bit value to scan. Must be non-zero.
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@param Value The value to search for in the target buffer.
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@return The pointer to the first occurrence, or NULL if not found.
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**/
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CONST VOID *
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EFIAPI
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InternalMemScanMem64 (
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IN CONST VOID *Buffer,
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IN UINTN Length,
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IN UINT64 Value
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)
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{
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CONST UINT64 *Pointer;
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Pointer = (CONST UINT64*)Buffer;
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do {
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if (*Pointer == Value) {
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return Pointer;
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}
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++Pointer;
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} while (--Length != 0);
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return NULL;
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}
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/**
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Checks whether the contents of a buffer are all zeros.
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@param Buffer The pointer to the buffer to be checked.
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@param Length The size of the buffer (in bytes) to be checked.
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@retval TRUE Contents of the buffer are all zeros.
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@retval FALSE Contents of the buffer are not all zeros.
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**/
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BOOLEAN
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EFIAPI
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InternalMemIsZeroBuffer (
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IN CONST VOID *Buffer,
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IN UINTN Length
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)
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{
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CONST UINT8 *BufferData;
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UINTN Index;
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BufferData = Buffer;
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for (Index = 0; Index < Length; Index++) {
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if (BufferData[Index] != 0) {
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return FALSE;
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}
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}
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return TRUE;
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}
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