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https://github.com/boostorg/endian.git
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Add conversion_use_case
This commit is contained in:
Beman
51
example/conversion_use_case.cpp
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51
example/conversion_use_case.cpp
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// endian/example/conversion_use_case.cpp
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// Copyright Beman Dawes 2014
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// Distributed under the Boost Software License, Version 1.0.
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// See http://www.boost.org/LICENSE_1_0.txt
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// This program reads a binary file of fixed length records, with a format defined
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// in a header file supplied by a third-party. The records inserted into a vector,
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// and the vector is sorted. The sorted records are then written to an output file.
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// Full I/O error testing omitted for brevity, So don't try this at home.
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#include "third_party_format.hpp"
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#include <boost/endian/conversion.hpp>
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#include <vector>
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#include <fstream>
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#include <algorithm>
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#include <iostream>
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using third_party::record;
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int main()
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{
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std::ifstream in("data.bin", std::ios::binary);
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if (!in) { std::cout << "Could not open data.bin\n"; return 1; }
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std::ofstream out("sorted-data.bin", std::ios::binary);
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if (!out) { std::cout << "Could not open sorted-data.bin\n"; return 1; }
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record rec;
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std::vector<record> recs;
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while (!in.eof()) // read each record
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{
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in.read((char*)&rec, sizeof(rec));
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rec.balance = boost::endian::big_to_native(rec.balance); // reverse if needed
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recs.push_back(rec);
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}
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std::sort(recs.begin(), recs.end(), // decending sort by balance
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[](const record& lhs, const record& rhs) -> bool
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{ return lhs.balance > rhs.balance; });
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for (auto &out_rec : recs) // write each record
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{
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out_rec.balance = boost::endian::native_to_big(rec.balance); // reverse if needed
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out.write((const char*)&out_rec, sizeof(out_rec));
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}
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}
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19
example/third_party_format.hpp
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19
example/third_party_format.hpp
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// endian/example/third_party_format.hpp
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// Copyright Beman Dawes 2014
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// Distributed under the Boost Software License, Version 1.0.
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// See http://www.boost.org/LICENSE_1_0.txt
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#include <cstdint>
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namespace third_party
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{
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struct record
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{
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uint32_t id; // big endian
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int32_t balance; // big endian
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// ... data members whose endianness is not a concern
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};
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}
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88
test/msvc/conversion_use_case/conversion_use_case.vcxproj
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88
test/msvc/conversion_use_case/conversion_use_case.vcxproj
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<?xml version="1.0" encoding="utf-8"?>
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<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<ItemGroup Label="ProjectConfigurations">
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<ProjectConfiguration Include="Debug|Win32">
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<Configuration>Debug</Configuration>
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<Platform>Win32</Platform>
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</ProjectConfiguration>
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<ProjectConfiguration Include="Release|Win32">
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<Configuration>Release</Configuration>
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<Platform>Win32</Platform>
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</ProjectConfiguration>
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</ItemGroup>
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<PropertyGroup Label="Globals">
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<ProjectGuid>{1139E765-DE0F-497A-A7D9-EB2683521DF1}</ProjectGuid>
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<Keyword>Win32Proj</Keyword>
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<RootNamespace>conversion_use_case</RootNamespace>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>true</UseDebugLibraries>
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<PlatformToolset>v140</PlatformToolset>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>false</UseDebugLibraries>
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<PlatformToolset>v140</PlatformToolset>
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<WholeProgramOptimization>true</WholeProgramOptimization>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
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<ImportGroup Label="ExtensionSettings">
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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<Import Project="..\common.props" />
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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<Import Project="..\common.props" />
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</ImportGroup>
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<PropertyGroup Label="UserMacros" />
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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<LinkIncremental>true</LinkIncremental>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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<LinkIncremental>false</LinkIncremental>
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</PropertyGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
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<ClCompile>
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<PrecompiledHeader>
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</PrecompiledHeader>
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<WarningLevel>Level3</WarningLevel>
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<Optimization>Disabled</Optimization>
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<PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<SDLCheck>true</SDLCheck>
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</ClCompile>
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<Link>
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<SubSystem>Console</SubSystem>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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</Link>
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</ItemDefinitionGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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<ClCompile>
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<WarningLevel>Level3</WarningLevel>
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<PrecompiledHeader>
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</PrecompiledHeader>
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<Optimization>MaxSpeed</Optimization>
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<FunctionLevelLinking>true</FunctionLevelLinking>
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<IntrinsicFunctions>true</IntrinsicFunctions>
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<PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<SDLCheck>true</SDLCheck>
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</ClCompile>
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<Link>
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<SubSystem>Console</SubSystem>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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<EnableCOMDATFolding>true</EnableCOMDATFolding>
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<OptimizeReferences>true</OptimizeReferences>
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</Link>
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</ItemDefinitionGroup>
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<ItemGroup>
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<ClCompile Include="..\..\..\example\conversion_use_case.cpp" />
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</ItemGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
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<ImportGroup Label="ExtensionTargets">
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</ImportGroup>
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</Project>
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@ -27,6 +27,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "buffer_test", "buffer_test\
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EndProject
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EndProject
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "uses_cases", "uses_cases\uses_cases.vcxproj", "{36BF451A-EAEF-4140-92E4-6EA461A26107}"
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "uses_cases", "uses_cases\uses_cases.vcxproj", "{36BF451A-EAEF-4140-92E4-6EA461A26107}"
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EndProject
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EndProject
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Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "conversion_use_case", "conversion_use_case\conversion_use_case.vcxproj", "{1139E765-DE0F-497A-A7D9-EB2683521DF1}"
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EndProject
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Global
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Win32 = Debug|Win32
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Debug|Win32 = Debug|Win32
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@ -122,6 +124,12 @@ Global
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{36BF451A-EAEF-4140-92E4-6EA461A26107}.Release|Win32.ActiveCfg = Release|Win32
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{36BF451A-EAEF-4140-92E4-6EA461A26107}.Release|Win32.ActiveCfg = Release|Win32
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{36BF451A-EAEF-4140-92E4-6EA461A26107}.Release|Win32.Build.0 = Release|Win32
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{36BF451A-EAEF-4140-92E4-6EA461A26107}.Release|Win32.Build.0 = Release|Win32
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{36BF451A-EAEF-4140-92E4-6EA461A26107}.Release|x64.ActiveCfg = Release|Win32
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{36BF451A-EAEF-4140-92E4-6EA461A26107}.Release|x64.ActiveCfg = Release|Win32
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{1139E765-DE0F-497A-A7D9-EB2683521DF1}.Debug|Win32.ActiveCfg = Debug|Win32
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{1139E765-DE0F-497A-A7D9-EB2683521DF1}.Debug|Win32.Build.0 = Debug|Win32
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{1139E765-DE0F-497A-A7D9-EB2683521DF1}.Debug|x64.ActiveCfg = Debug|Win32
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{1139E765-DE0F-497A-A7D9-EB2683521DF1}.Release|Win32.ActiveCfg = Release|Win32
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{1139E765-DE0F-497A-A7D9-EB2683521DF1}.Release|Win32.Build.0 = Release|Win32
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{1139E765-DE0F-497A-A7D9-EB2683521DF1}.Release|x64.ActiveCfg = Release|Win32
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EndGlobalSection
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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HideSolutionNode = FALSE
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