MdeModulePkg/RegularExpressionDxe: Make oniguruma a submodule in edk2.

[mirror_edk2.git] / MdeModulePkg / Universal / RegularExpressionDxe / OnigurumaIntrinsics.c

/** @file\r
\r
  Provide intrinsics within Oniguruma\r
\r
  (C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>\r
  Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
**/\r
\r
#include <Library/BaseMemoryLib.h>\r
\r
//\r
// From CryptoPkg/IntrinsicLib\r
//\r
\r
/* Copies bytes between buffers */\r
#pragma function(memcpy)\r
void * memcpy (void *dest, const void *src, unsigned int count)\r
{\r
  return CopyMem (dest, src, (UINTN)count);\r
}\r
\r
/* Sets buffers to a specified character */\r
#pragma function(memset)\r
void * memset (void *dest, char ch, unsigned int count)\r
{\r
  //\r
  // NOTE: Here we use one base implementation for memset, instead of the direct\r
  //       optimized SetMem() wrapper. Because the IntrinsicLib has to be built\r
  //       without whole program optimization option, and there will be some\r
  //       potential register usage errors when calling other optimized codes.\r
  //\r
\r
  //\r
  // Declare the local variables that actually move the data elements as\r
  // volatile to prevent the optimizer from replacing this function with\r
  // the intrinsic memset()\r
  //\r
  volatile UINT8  *Pointer;\r
\r
  Pointer = (UINT8 *)dest;\r
  while (count-- != 0) {\r
    *(Pointer++) = ch;\r
  }\r
\r
  return dest;\r
}\r