[mirror_edk2.git] / EdkCompatibilityPkg / Foundation / Library / EfiCommonLib / EfiCopyMem.c

/*++\r
\r
Copyright (c) 2004, Intel Corporation                                                         \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:\r
\r
  EfiCopyMem.c\r
\r
Abstract:\r
\r
  Implementation of the EfiCopyMem routine. This function is broken\r
  out into its own source file so that it can be excluded from a\r
  build for a particular platform easily if an optimized version \r
  is desired.\r
\r
--*/\r
\r
#include "Tiano.h"\r
\r
VOID\r
EfiCommonLibCopyMem (\r
  IN VOID   *Destination,\r
  IN VOID   *Source,\r
  IN UINTN  Length\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Copy Length bytes from Source to Destination.\r
\r
Arguments:\r
\r
  Destination - Target of copy\r
\r
  Source      - Place to copy from\r
\r
  Length      - Number of bytes to copy\r
\r
Returns:\r
\r
  None\r
\r
--*/\r
{\r
  CHAR8 *Destination8;\r
  CHAR8 *Source8;\r
\r
  if (Source < Destination) {\r
    Destination8  = (CHAR8 *) Destination + Length - 1;\r
    Source8       = (CHAR8 *) Source + Length - 1;\r
    while (Length--) {\r
      *(Destination8--) = *(Source8--);\r
    }\r
  } else {\r
    Destination8  = (CHAR8 *) Destination;\r
    Source8       = (CHAR8 *) Source;\r
    while (Length--) {\r
      *(Destination8++) = *(Source8++);\r
    }\r
  }\r
}\r
Commit	Line	Data
3eb9473e	1	/*++\r
	2	\r
	3	Copyright (c) 2004, Intel Corporation \r
	4	All rights reserved. This program and the accompanying materials \r
	5	are licensed and made available under the terms and conditions of the BSD License \r
	6	which accompanies this distribution. The full text of the license may be found at \r
	7	http://opensource.org/licenses/bsd-license.php \r
	8	\r
	9	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r
	10	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r
	11	\r
	12	Module Name:\r
	13	\r
	14	EfiCopyMem.c\r
	15	\r
	16	Abstract:\r
	17	\r
	18	Implementation of the EfiCopyMem routine. This function is broken\r
	19	out into its own source file so that it can be excluded from a\r
	20	build for a particular platform easily if an optimized version \r
	21	is desired.\r
	22	\r
	23	--*/\r
	24	\r
	25	#include "Tiano.h"\r
	26	\r
	27	VOID\r
	28	EfiCommonLibCopyMem (\r
	29	IN VOID *Destination,\r
	30	IN VOID *Source,\r
	31	IN UINTN Length\r
	32	)\r
	33	/*++\r
	34	\r
	35	Routine Description:\r
	36	\r
	37	Copy Length bytes from Source to Destination.\r
	38	\r
	39	Arguments:\r
	40	\r
	41	Destination - Target of copy\r
	42	\r
	43	Source - Place to copy from\r
	44	\r
	45	Length - Number of bytes to copy\r
	46	\r
	47	Returns:\r
	48	\r
	49	None\r
	50	\r
	51	--*/\r
	52	{\r
	53	CHAR8 *Destination8;\r
	54	CHAR8 *Source8;\r
	55	\r
	56	if (Source < Destination) {\r
	57	Destination8 = (CHAR8 *) Destination + Length - 1;\r
	58	Source8 = (CHAR8 *) Source + Length - 1;\r
	59	while (Length--) {\r
	60	(Destination8--) = (Source8--);\r
	61	}\r
	62	} else {\r
	63	Destination8 = (CHAR8 *) Destination;\r
	64	Source8 = (CHAR8 *) Source;\r
65	while (Length--) {\r
66	(Destination8++) = (Source8++);\r
67	}\r
68	}\r
69	}\r