1 /** @file
2 Byte Swap routines for endian-nes conversions.
3
4 Copyright (c) 2010, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials are licensed and made available under
6 the terms and conditions of the BSD License that accompanies this distribution.
7 The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php.
9
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
12 **/
13 #include <Library/BaseLib.h>
14 #include <LibConfig.h>
15
16 #include <sys/bswap.h>
17
18 // Undefine macro versions of the functions to be defined below.
19 #undef bswap16
20 #undef bswap32
21 #undef bswap64
22
23 /**
24 Switches the endianness of a 16-bit integer.
25
26 This function swaps the bytes in a 16-bit unsigned value to switch the value
27 from little endian to big endian or vice versa. The byte swapped value is
28 returned.
29
30 @param Value A 16-bit unsigned value.
31
32 @return The byte swapped Value.
33
34 **/
bswap16(uint16_t Value)35 uint16_t bswap16(uint16_t Value)
36 {
37 return SwapBytes16(Value);
38 }
39
40 /**
41 Switches the endianness of a 32-bit integer.
42
43 This function swaps the bytes in a 32-bit unsigned value to switch the value
44 from little endian to big endian or vice versa. The byte swapped value is
45 returned.
46
47 @param Value A 32-bit unsigned value.
48
49 @return The byte swapped Value.
50
51 **/
bswap32(uint32_t Value)52 uint32_t bswap32(uint32_t Value)
53 {
54 return SwapBytes32(Value);
55 }
56
57 /**
58 Switches the endianness of a 64-bit integer.
59
60 This function swaps the bytes in a 64-bit unsigned value to switch the value
61 from little endian to big endian or vice versa. The byte swapped value is
62 returned.
63
64 @param Value A 64-bit unsigned value.
65
66 @return The byte swapped Value.
67
68 **/
bswap64(uint64_t Value)69 uint64_t bswap64(uint64_t Value)
70 {
71 return SwapBytes64(Value);
72 }
73