CiftiLib
A C++ library for CIFTI-2 and CIFTI-1 files
ByteSwapping.h
1#ifndef __BYTE_SWAPPING_H__
2#define __BYTE_SWAPPING_H__
3
4/*LICENSE_START*/
5/*
6 * Copyright (c) 2014, Washington University School of Medicine
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without modification,
10 * are permitted provided that the following conditions are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
26 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
28 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include <stdint.h>
32
33namespace cifti {
34
41 public:
42 template<typename T>
43 static void swap(T& toSwap);
44
45 template<typename T>
46 static void swapArray(T* toSwap, const uint64_t& count);
47
48 inline static bool isBigEndian()
49 {
50 uint16_t test = 1;
51 return (((char*)&test)[0] == 0);
52 }
53
54 };
55
56 template<typename T>
57 void ByteSwapping::swap(T& toSwap)
58 {
59 if (sizeof(T) == 1) return;//we could specialize 1-byte types, but this should optimize out
60 T temp = toSwap;
61 char* from = (char*)&temp;
62 char* to = (char*)&toSwap;
63 for (int i = 0; i < (int)sizeof(T); ++i)
64 {
65 to[i] = from[sizeof(T) - i - 1];
66 }
67 }
68
69 template<typename T>
70 void ByteSwapping::swapArray(T* toSwap, const uint64_t& count)
71 {
72 if (sizeof(T) == 1) return;//ditto
73 for (uint64_t i = 0; i < count; ++i)
74 {
75 swap(toSwap[i]);
76 }
77 }
78
79}
80
81#endif // __BYTE_SWAPPING_H__
82
Definition: ByteSwapping.h:40
namespace for all CiftiLib functionality
Definition: CiftiBrainModelsMap.h:42