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Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseMemoryLib/ScanMem16Wrapper.c')
-rw-r--r-- | src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseMemoryLib/ScanMem16Wrapper.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseMemoryLib/ScanMem16Wrapper.c b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseMemoryLib/ScanMem16Wrapper.c new file mode 100644 index 00000000..1e284f5f --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/MdePkg/Library/BaseMemoryLib/ScanMem16Wrapper.c @@ -0,0 +1,61 @@ +/** @file + ScanMem16() implementation. + + The following BaseMemoryLib instances contain the same copy of this file: + + BaseMemoryLib + BaseMemoryLibMmx + BaseMemoryLibSse2 + BaseMemoryLibRepStr + BaseMemoryLibOptDxe + BaseMemoryLibOptPei + PeiMemoryLib + UefiMemoryLib + + Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include "MemLibInternals.h" + +/** + 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 the target buffer specified by Buffer and Length from the lowest + address to the highest address for a 16-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 Length > 0 and Buffer is NULL, 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(). + If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). + + @param Buffer The pointer to the target buffer to scan. + @param Length The number of bytes in Buffer to scan. + @param Value The value to search for in the target buffer. + + @return A pointer to the matching byte in the target buffer or NULL otherwise. + +**/ +VOID * +EFIAPI +ScanMem16 ( + IN CONST VOID *Buffer, + IN UINTN Length, + IN UINT16 Value + ) +{ + if (Length == 0) { + return NULL; + } + + ASSERT (Buffer != NULL); + ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0); + ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer)); + ASSERT ((Length & (sizeof (Value) - 1)) == 0); + + return (VOID*)InternalMemScanMem16 (Buffer, Length / sizeof (Value), Value); +} |