blocxx
ByteSwap.hpp
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32
33
37
38#ifndef BLOCXX_BYTE_SWAP_HPP_
39#define BLOCXX_BYTE_SWAP_HPP_
40#include "blocxx/BLOCXX_config.h"
41#include "blocxx/Types.hpp"
42
43#if !defined(BLOCXX_WORDS_BIGENDIAN) && defined(BLOCXX_HAVE_BYTESWAP_H) && !defined(BLOCXX_DEBUG_MEMORY)
44#include <byteswap.h>
45#endif
46
47namespace BLOCXX_NAMESPACE
48{
49
50// this will be defined by the configure script.
51#ifndef BLOCXX_WORDS_BIGENDIAN
52#if defined(BLOCXX_HAVE_BYTESWAP_H) && !defined(BLOCXX_DEBUG_MEMORY)
53
59inline UInt16 hton16(UInt16 v) { return __bswap_16(v); }
65inline UInt32 hton32(UInt32 v) { return __bswap_32(v); }
71inline UInt64 hton64(UInt64 v) { return __bswap_64(v); }
77inline UInt16 ntoh16(UInt16 v) { return __bswap_16(v); }
83inline UInt32 ntoh32(UInt32 v) { return __bswap_32(v); }
89inline UInt64 ntoh64(UInt64 v) { return __bswap_64(v); }
90#else
91inline UInt16 hton16(UInt16 v)
92{
93 UInt16 rval;
94 (reinterpret_cast<unsigned char*>(&rval))[1] = (reinterpret_cast<unsigned char*>(&v))[0];
95 (reinterpret_cast<unsigned char*>(&rval))[0] = (reinterpret_cast<unsigned char*>(&v))[1];
96 return rval;
97}
98inline UInt32 hton32(UInt32 v)
99{
100 UInt32 rval;
101 (reinterpret_cast<unsigned char*>(&rval))[3] = (reinterpret_cast<unsigned char*>(&v))[0];
102 (reinterpret_cast<unsigned char*>(&rval))[2] = (reinterpret_cast<unsigned char*>(&v))[1];
103 (reinterpret_cast<unsigned char*>(&rval))[1] = (reinterpret_cast<unsigned char*>(&v))[2];
104 (reinterpret_cast<unsigned char*>(&rval))[0] = (reinterpret_cast<unsigned char*>(&v))[3];
105 return rval;
106}
107inline UInt64 hton64(UInt64 v)
108{
109 UInt64 rval;
110 (reinterpret_cast<unsigned char*>(&rval))[7] = (reinterpret_cast<unsigned char*>(&v))[0];
111 (reinterpret_cast<unsigned char*>(&rval))[6] = (reinterpret_cast<unsigned char*>(&v))[1];
112 (reinterpret_cast<unsigned char*>(&rval))[5] = (reinterpret_cast<unsigned char*>(&v))[2];
113 (reinterpret_cast<unsigned char*>(&rval))[4] = (reinterpret_cast<unsigned char*>(&v))[3];
114 (reinterpret_cast<unsigned char*>(&rval))[3] = (reinterpret_cast<unsigned char*>(&v))[4];
115 (reinterpret_cast<unsigned char*>(&rval))[2] = (reinterpret_cast<unsigned char*>(&v))[5];
116 (reinterpret_cast<unsigned char*>(&rval))[1] = (reinterpret_cast<unsigned char*>(&v))[6];
117 (reinterpret_cast<unsigned char*>(&rval))[0] = (reinterpret_cast<unsigned char*>(&v))[7];
118 return rval;
119}
120inline UInt16 ntoh16(UInt16 v)
121{
122 return hton16(v);
123}
124inline UInt32 ntoh32(UInt32 v)
125{
126 return hton32(v);
127}
128inline UInt64 ntoh64(UInt64 v)
129{
130 return hton64(v);
131}
132#endif
133#else // we're big-endian, just pass-thru
134inline UInt16 hton16(UInt16 v) { return v; }
135inline UInt32 hton32(UInt32 v) { return v; }
136inline UInt64 hton64(UInt64 v) { return v; }
137inline UInt16 ntoh16(UInt16 v) { return v; }
138inline UInt32 ntoh32(UInt32 v) { return v; }
139inline UInt64 ntoh64(UInt64 v) { return v; }
140#endif
141
142} // end namespace BLOCXX_NAMESPACE
143
144#endif
Taken from RFC 1321.
UInt64 hton64(UInt64 v)
Definition ByteSwap.hpp:107
UInt16 hton16(UInt16 v)
Definition ByteSwap.hpp:91
UInt16 ntoh16(UInt16 v)
Definition ByteSwap.hpp:120
UInt64 ntoh64(UInt64 v)
Definition ByteSwap.hpp:128
UInt32 ntoh32(UInt32 v)
Definition ByteSwap.hpp:124
UInt32 hton32(UInt32 v)
Definition ByteSwap.hpp:98