| 1 | // |
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| 2 | // ByteOrder.h |
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| 3 | // |
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| 4 | // $Id: //poco/1.3/Foundation/include/Poco/ByteOrder.h#1 $ |
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| 5 | // |
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| 6 | // Library: Foundation |
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| 7 | // Package: Core |
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| 8 | // Module: ByteOrder |
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| 9 | // |
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| 10 | // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. |
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| 11 | // and Contributors. |
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| 12 | // |
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| 13 | // Permission is hereby granted, free of charge, to any person or organization |
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| 14 | // obtaining a copy of the software and accompanying documentation covered by |
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| 15 | // this license (the "Software") to use, reproduce, display, distribute, |
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| 16 | // execute, and transmit the Software, and to prepare derivative works of the |
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| 17 | // Software, and to permit third-parties to whom the Software is furnished to |
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| 18 | // do so, all subject to the following: |
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| 19 | // |
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| 20 | // The copyright notices in the Software and this entire statement, including |
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| 21 | // the above license grant, this restriction and the following disclaimer, |
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| 22 | // must be included in all copies of the Software, in whole or in part, and |
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| 23 | // all derivative works of the Software, unless such copies or derivative |
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| 24 | // works are solely in the form of machine-executable object code generated by |
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| 25 | // a source language processor. |
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| 26 | // |
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| 27 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 28 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 29 | // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
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| 30 | // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
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| 31 | // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
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| 32 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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| 33 | // DEALINGS IN THE SOFTWARE. |
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| 34 | // |
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| 35 | |
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| 36 | |
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| 37 | #ifndef Foundation_ByteOrder_INCLUDED |
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| 38 | #define Foundation_ByteOrder_INCLUDED |
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| 39 | |
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| 40 | |
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| 41 | #include "Poco/Foundation.h" |
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| 42 | #include "Poco/Types.h" |
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| 43 | |
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| 44 | |
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| 45 | namespace Poco { |
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| 46 | |
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| 47 | |
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| 48 | class Foundation_API ByteOrder |
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| 49 | /// This class contains a number of static methods |
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| 50 | /// to convert between big-endian and little-endian |
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| 51 | /// integers of various sizes. |
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| 52 | { |
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| 53 | public: |
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| 54 | static Int16 flipBytes(Int16 value); |
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| 55 | static UInt16 flipBytes(UInt16 value); |
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| 56 | static Int32 flipBytes(Int32 value); |
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| 57 | static UInt32 flipBytes(UInt32 value); |
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| 58 | #if defined(POCO_HAVE_INT64) |
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| 59 | static Int64 flipBytes(Int64 value); |
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| 60 | static UInt64 flipBytes(UInt64 value); |
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| 61 | #endif |
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| 62 | |
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| 63 | static Int16 toBigEndian(Int16 value); |
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| 64 | static UInt16 toBigEndian (UInt16 value); |
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| 65 | static Int32 toBigEndian(Int32 value); |
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| 66 | static UInt32 toBigEndian (UInt32 value); |
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| 67 | #if defined(POCO_HAVE_INT64) |
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| 68 | static Int64 toBigEndian(Int64 value); |
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| 69 | static UInt64 toBigEndian (UInt64 value); |
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| 70 | #endif |
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| 71 | |
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| 72 | static Int16 fromBigEndian(Int16 value); |
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| 73 | static UInt16 fromBigEndian (UInt16 value); |
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| 74 | static Int32 fromBigEndian(Int32 value); |
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| 75 | static UInt32 fromBigEndian (UInt32 value); |
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| 76 | #if defined(POCO_HAVE_INT64) |
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| 77 | static Int64 fromBigEndian(Int64 value); |
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| 78 | static UInt64 fromBigEndian (UInt64 value); |
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| 79 | #endif |
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| 80 | |
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| 81 | static Int16 toLittleEndian(Int16 value); |
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| 82 | static UInt16 toLittleEndian (UInt16 value); |
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| 83 | static Int32 toLittleEndian(Int32 value); |
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| 84 | static UInt32 toLittleEndian (UInt32 value); |
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| 85 | #if defined(POCO_HAVE_INT64) |
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| 86 | static Int64 toLittleEndian(Int64 value); |
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| 87 | static UInt64 toLittleEndian (UInt64 value); |
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| 88 | #endif |
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| 89 | |
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| 90 | static Int16 fromLittleEndian(Int16 value); |
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| 91 | static UInt16 fromLittleEndian (UInt16 value); |
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| 92 | static Int32 fromLittleEndian(Int32 value); |
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| 93 | static UInt32 fromLittleEndian (UInt32 value); |
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| 94 | #if defined(POCO_HAVE_INT64) |
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| 95 | static Int64 fromLittleEndian(Int64 value); |
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| 96 | static UInt64 fromLittleEndian (UInt64 value); |
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| 97 | #endif |
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| 98 | |
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| 99 | static Int16 toNetwork(Int16 value); |
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| 100 | static UInt16 toNetwork (UInt16 value); |
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| 101 | static Int32 toNetwork(Int32 value); |
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| 102 | static UInt32 toNetwork (UInt32 value); |
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| 103 | #if defined(POCO_HAVE_INT64) |
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| 104 | static Int64 toNetwork(Int64 value); |
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| 105 | static UInt64 toNetwork (UInt64 value); |
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| 106 | #endif |
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| 107 | |
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| 108 | static Int16 fromNetwork(Int16 value); |
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| 109 | static UInt16 fromNetwork (UInt16 value); |
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| 110 | static Int32 fromNetwork(Int32 value); |
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| 111 | static UInt32 fromNetwork (UInt32 value); |
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| 112 | #if defined(POCO_HAVE_INT64) |
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| 113 | static Int64 fromNetwork(Int64 value); |
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| 114 | static UInt64 fromNetwork (UInt64 value); |
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| 115 | #endif |
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| 116 | }; |
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| 117 | |
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| 118 | |
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| 119 | // |
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| 120 | // inlines |
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| 121 | // |
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| 122 | inline UInt16 ByteOrder::flipBytes(UInt16 value) |
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| 123 | { |
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| 124 | return ((value >> 8) & 0x00FF) | ((value << 8) & 0xFF00); |
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| 125 | } |
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| 126 | |
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| 127 | |
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| 128 | inline Int16 ByteOrder::flipBytes(Int16 value) |
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| 129 | { |
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| 130 | return Int16(flipBytes(UInt16(value))); |
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| 131 | } |
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| 132 | |
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| 133 | |
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| 134 | inline UInt32 ByteOrder::flipBytes(UInt32 value) |
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| 135 | { |
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| 136 | return ((value >> 24) & 0x000000FF) | ((value >> 8) & 0x0000FF00) |
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| 137 | | ((value << 8) & 0x00FF0000) | ((value << 24) & 0xFF000000); |
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| 138 | } |
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| 139 | |
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| 140 | |
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| 141 | inline Int32 ByteOrder::flipBytes(Int32 value) |
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| 142 | { |
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| 143 | return Int32(flipBytes(UInt32(value))); |
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| 144 | } |
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| 145 | |
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| 146 | |
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| 147 | #if defined(POCO_HAVE_INT64) |
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| 148 | inline UInt64 ByteOrder::flipBytes(UInt64 value) |
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| 149 | { |
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| 150 | UInt32 hi = UInt32(value >> 32); |
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| 151 | UInt32 lo = UInt32(value & 0xFFFFFFFF); |
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| 152 | return UInt64(flipBytes(hi)) | (UInt64(flipBytes(lo)) << 32); |
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| 153 | } |
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| 154 | |
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| 155 | |
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| 156 | inline Int64 ByteOrder::flipBytes(Int64 value) |
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| 157 | { |
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| 158 | return Int64(flipBytes(UInt64(value))); |
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| 159 | } |
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| 160 | #endif // POCO_HAVE_INT64 |
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| 161 | |
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| 162 | |
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| 163 | // |
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| 164 | // some macro trickery to automate the method implementation |
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| 165 | // |
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| 166 | #define POCO_IMPLEMENT_BYTEORDER_NOOP_(op, type) \ |
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| 167 | inline type ByteOrder::op(type value) \ |
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| 168 | { \ |
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| 169 | return value; \ |
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| 170 | } |
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| 171 | #define POCO_IMPLEMENT_BYTEORDER_FLIP_(op, type) \ |
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| 172 | inline type ByteOrder::op(type value) \ |
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| 173 | { \ |
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| 174 | return flipBytes(value); \ |
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| 175 | } |
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| 176 | |
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| 177 | |
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| 178 | #if defined(POCO_HAVE_INT64) |
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| 179 | #define POCO_IMPLEMENT_BYTEORDER_NOOP(op) \ |
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| 180 | POCO_IMPLEMENT_BYTEORDER_NOOP_(op, Int16) \ |
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| 181 | POCO_IMPLEMENT_BYTEORDER_NOOP_(op, UInt16) \ |
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| 182 | POCO_IMPLEMENT_BYTEORDER_NOOP_(op, Int32) \ |
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| 183 | POCO_IMPLEMENT_BYTEORDER_NOOP_(op, UInt32) \ |
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| 184 | POCO_IMPLEMENT_BYTEORDER_NOOP_(op, Int64) \ |
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| 185 | POCO_IMPLEMENT_BYTEORDER_NOOP_(op, UInt64) |
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| 186 | #define POCO_IMPLEMENT_BYTEORDER_FLIP(op) \ |
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| 187 | POCO_IMPLEMENT_BYTEORDER_FLIP_(op, Int16) \ |
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| 188 | POCO_IMPLEMENT_BYTEORDER_FLIP_(op, UInt16) \ |
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| 189 | POCO_IMPLEMENT_BYTEORDER_FLIP_(op, Int32) \ |
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| 190 | POCO_IMPLEMENT_BYTEORDER_FLIP_(op, UInt32) \ |
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| 191 | POCO_IMPLEMENT_BYTEORDER_FLIP_(op, Int64) \ |
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| 192 | POCO_IMPLEMENT_BYTEORDER_FLIP_(op, UInt64) |
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| 193 | #else |
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| 194 | #define POCO_IMPLEMENT_BYTEORDER_NOOP(op) \ |
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| 195 | POCO_IMPLEMENT_BYTEORDER_NOOP_(op, Int16) \ |
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| 196 | POCO_IMPLEMENT_BYTEORDER_NOOP_(op, UInt16) \ |
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| 197 | POCO_IMPLEMENT_BYTEORDER_NOOP_(op, Int32) \ |
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| 198 | POCO_IMPLEMENT_BYTEORDER_NOOP_(op, UInt32) |
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| 199 | #define POCO_IMPLEMENT_BYTEORDER_FLIP(op) \ |
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| 200 | POCO_IMPLEMENT_BYTEORDER_FLIP_(op, Int16) \ |
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| 201 | POCO_IMPLEMENT_BYTEORDER_FLIP_(op, UInt16) \ |
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| 202 | POCO_IMPLEMENT_BYTEORDER_FLIP_(op, Int32) \ |
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| 203 | POCO_IMPLEMENT_BYTEORDER_FLIP_(op, UInt32) |
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| 204 | #endif |
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| 205 | |
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| 206 | |
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| 207 | #if defined(POCO_ARCH_BIG_ENDIAN) |
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| 208 | #define POCO_IMPLEMENT_BYTEORDER_BIG POCO_IMPLEMENT_BYTEORDER_NOOP |
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| 209 | #define POCO_IMPLEMENT_BYTEORDER_LIT POCO_IMPLEMENT_BYTEORDER_FLIP |
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| 210 | #else |
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| 211 | #define POCO_IMPLEMENT_BYTEORDER_BIG POCO_IMPLEMENT_BYTEORDER_FLIP |
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| 212 | #define POCO_IMPLEMENT_BYTEORDER_LIT POCO_IMPLEMENT_BYTEORDER_NOOP |
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| 213 | #endif |
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| 214 | |
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| 215 | |
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| 216 | POCO_IMPLEMENT_BYTEORDER_BIG(toBigEndian) |
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| 217 | POCO_IMPLEMENT_BYTEORDER_BIG(fromBigEndian) |
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| 218 | POCO_IMPLEMENT_BYTEORDER_BIG(toNetwork) |
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| 219 | POCO_IMPLEMENT_BYTEORDER_BIG(fromNetwork) |
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| 220 | POCO_IMPLEMENT_BYTEORDER_LIT(toLittleEndian) |
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| 221 | POCO_IMPLEMENT_BYTEORDER_LIT(fromLittleEndian) |
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| 222 | |
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| 223 | |
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| 224 | } // namespace Poco |
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| 225 | |
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| 226 | |
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| 227 | #endif // Foundation_ByteOrder_INCLUDED |
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