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###############################################################################
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# Set default behavior to automatically normalize line endings.
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||||
###############################################################################
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* text=auto
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||||
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||||
###############################################################################
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||||
# Set default behavior for command prompt diff.
|
||||
#
|
||||
# This is need for earlier builds of msysgit that does not have it on by
|
||||
# default for csharp files.
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||||
# Note: This is only used by command line
|
||||
###############################################################################
|
||||
#*.cs diff=csharp
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||||
|
||||
###############################################################################
|
||||
# Set the merge driver for project and solution files
|
||||
#
|
||||
# Merging from the command prompt will add diff markers to the files if there
|
||||
# are conflicts (Merging from VS is not affected by the settings below, in VS
|
||||
# the diff markers are never inserted). Diff markers may cause the following
|
||||
# file extensions to fail to load in VS. An alternative would be to treat
|
||||
# these files as binary and thus will always conflict and require user
|
||||
# intervention with every merge. To do so, just uncomment the entries below
|
||||
###############################################################################
|
||||
#*.sln merge=binary
|
||||
#*.csproj merge=binary
|
||||
#*.vbproj merge=binary
|
||||
#*.vcxproj merge=binary
|
||||
#*.vcproj merge=binary
|
||||
#*.dbproj merge=binary
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||||
#*.fsproj merge=binary
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||||
#*.lsproj merge=binary
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||||
#*.wixproj merge=binary
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||||
#*.modelproj merge=binary
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||||
#*.sqlproj merge=binary
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||||
#*.wwaproj merge=binary
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||||
|
||||
###############################################################################
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||||
# behavior for image files
|
||||
#
|
||||
# image files are treated as binary by default.
|
||||
###############################################################################
|
||||
#*.jpg binary
|
||||
#*.png binary
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||||
#*.gif binary
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||||
|
||||
###############################################################################
|
||||
# diff behavior for common document formats
|
||||
#
|
||||
# Convert binary document formats to text before diffing them. This feature
|
||||
# is only available from the command line. Turn it on by uncommenting the
|
||||
# entries below.
|
||||
###############################################################################
|
||||
#*.doc diff=astextplain
|
||||
#*.DOC diff=astextplain
|
||||
#*.docx diff=astextplain
|
||||
#*.DOCX diff=astextplain
|
||||
#*.dot diff=astextplain
|
||||
#*.DOT diff=astextplain
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||||
#*.pdf diff=astextplain
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||||
#*.PDF diff=astextplain
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||||
#*.rtf diff=astextplain
|
||||
#*.RTF diff=astextplain
|
||||
+369
@@ -0,0 +1,369 @@
|
||||
## Ignore Visual Studio temporary files, build results, and
|
||||
## files generated by popular Visual Studio add-ons.
|
||||
##
|
||||
## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
|
||||
|
||||
# User-specific files
|
||||
*.rsuser
|
||||
*.suo
|
||||
*.user
|
||||
*.userosscache
|
||||
*.sln.docstates
|
||||
|
||||
# User-specific files (MonoDevelop/Xamarin Studio)
|
||||
*.userprefs
|
||||
|
||||
# Mono auto generated files
|
||||
mono_crash.*
|
||||
|
||||
# Build results
|
||||
[Dd]ebug/
|
||||
[Dd]ebugPublic/
|
||||
[Rr]elease/
|
||||
[Rr]eleases/
|
||||
x64/
|
||||
x86/
|
||||
[Ww][Ii][Nn]32/
|
||||
[Aa][Rr][Mm]/
|
||||
[Aa][Rr][Mm]64/
|
||||
bld/
|
||||
[Bb]in/
|
||||
[Oo]bj/
|
||||
[Oo]ut/
|
||||
[Ll]og/
|
||||
[Ll]ogs/
|
||||
|
||||
# Visual Studio 2015/2017 cache/options directory
|
||||
.vs/
|
||||
# Uncomment if you have tasks that create the project's static files in wwwroot
|
||||
#wwwroot/
|
||||
|
||||
# Visual Studio 2017 auto generated files
|
||||
Generated\ Files/
|
||||
|
||||
# MSTest test Results
|
||||
[Tt]est[Rr]esult*/
|
||||
[Bb]uild[Ll]og.*
|
||||
|
||||
# NUnit
|
||||
*.VisualState.xml
|
||||
TestResult.xml
|
||||
nunit-*.xml
|
||||
|
||||
# Build Results of an ATL Project
|
||||
[Dd]ebugPS/
|
||||
[Rr]eleasePS/
|
||||
dlldata.c
|
||||
|
||||
# Benchmark Results
|
||||
BenchmarkDotNet.Artifacts/
|
||||
|
||||
# .NET Core
|
||||
project.lock.json
|
||||
project.fragment.lock.json
|
||||
artifacts/
|
||||
|
||||
# ASP.NET Scaffolding
|
||||
ScaffoldingReadMe.txt
|
||||
|
||||
# StyleCop
|
||||
StyleCopReport.xml
|
||||
|
||||
# Files built by Visual Studio
|
||||
*_i.c
|
||||
*_p.c
|
||||
*_h.h
|
||||
*.ilk
|
||||
*.meta
|
||||
*.obj
|
||||
*.iobj
|
||||
*.pch
|
||||
*.pdb
|
||||
*.ipdb
|
||||
*.pgc
|
||||
*.pgd
|
||||
*.rsp
|
||||
*.sbr
|
||||
*.tlb
|
||||
*.tli
|
||||
*.tlh
|
||||
*.tmp
|
||||
*.tmp_proj
|
||||
*_wpftmp.csproj
|
||||
*.log
|
||||
*.vspscc
|
||||
*.vssscc
|
||||
.builds
|
||||
*.pidb
|
||||
*.svclog
|
||||
*.scc
|
||||
|
||||
# Chutzpah Test files
|
||||
_Chutzpah*
|
||||
|
||||
# Visual C++ cache files
|
||||
ipch/
|
||||
*.aps
|
||||
*.ncb
|
||||
*.opendb
|
||||
*.opensdf
|
||||
*.sdf
|
||||
*.cachefile
|
||||
*.VC.db
|
||||
*.VC.VC.opendb
|
||||
|
||||
# Visual Studio profiler
|
||||
*.psess
|
||||
*.vsp
|
||||
*.vspx
|
||||
*.sap
|
||||
|
||||
# Visual Studio Trace Files
|
||||
*.e2e
|
||||
|
||||
# TFS 2012 Local Workspace
|
||||
$tf/
|
||||
|
||||
# Guidance Automation Toolkit
|
||||
*.gpState
|
||||
|
||||
# ReSharper is a .NET coding add-in
|
||||
_ReSharper*/
|
||||
*.[Rr]e[Ss]harper
|
||||
*.DotSettings.user
|
||||
|
||||
# TeamCity is a build add-in
|
||||
_TeamCity*
|
||||
|
||||
# DotCover is a Code Coverage Tool
|
||||
*.dotCover
|
||||
|
||||
# AxoCover is a Code Coverage Tool
|
||||
.axoCover/*
|
||||
!.axoCover/settings.json
|
||||
|
||||
# Coverlet is a free, cross platform Code Coverage Tool
|
||||
coverage*.json
|
||||
coverage*.xml
|
||||
coverage*.info
|
||||
|
||||
# Visual Studio code coverage results
|
||||
*.coverage
|
||||
*.coveragexml
|
||||
|
||||
# NCrunch
|
||||
_NCrunch_*
|
||||
.*crunch*.local.xml
|
||||
nCrunchTemp_*
|
||||
|
||||
# MightyMoose
|
||||
*.mm.*
|
||||
AutoTest.Net/
|
||||
|
||||
# Web workbench (sass)
|
||||
.sass-cache/
|
||||
|
||||
# Installshield output folder
|
||||
[Ee]xpress/
|
||||
|
||||
# DocProject is a documentation generator add-in
|
||||
DocProject/buildhelp/
|
||||
DocProject/Help/*.HxT
|
||||
DocProject/Help/*.HxC
|
||||
DocProject/Help/*.hhc
|
||||
DocProject/Help/*.hhk
|
||||
DocProject/Help/*.hhp
|
||||
DocProject/Help/Html2
|
||||
DocProject/Help/html
|
||||
|
||||
# Click-Once directory
|
||||
publish/
|
||||
|
||||
# Publish Web Output
|
||||
*.[Pp]ublish.xml
|
||||
*.azurePubxml
|
||||
# Note: Comment the next line if you want to checkin your web deploy settings,
|
||||
# but database connection strings (with potential passwords) will be unencrypted
|
||||
*.pubxml
|
||||
*.publishproj
|
||||
|
||||
# Microsoft Azure Web App publish settings. Comment the next line if you want to
|
||||
# checkin your Azure Web App publish settings, but sensitive information contained
|
||||
# in these scripts will be unencrypted
|
||||
PublishScripts/
|
||||
|
||||
# NuGet Packages
|
||||
*.nupkg
|
||||
# NuGet Symbol Packages
|
||||
*.snupkg
|
||||
# The packages folder can be ignored because of Package Restore
|
||||
**/[Pp]ackages/*
|
||||
# except build/, which is used as an MSBuild target.
|
||||
!**/[Pp]ackages/build/
|
||||
# Uncomment if necessary however generally it will be regenerated when needed
|
||||
#!**/[Pp]ackages/repositories.config
|
||||
# NuGet v3's project.json files produces more ignorable files
|
||||
*.nuget.props
|
||||
*.nuget.targets
|
||||
|
||||
# Microsoft Azure Build Output
|
||||
csx/
|
||||
*.build.csdef
|
||||
|
||||
# Microsoft Azure Emulator
|
||||
ecf/
|
||||
rcf/
|
||||
|
||||
# Windows Store app package directories and files
|
||||
AppPackages/
|
||||
BundleArtifacts/
|
||||
Package.StoreAssociation.xml
|
||||
_pkginfo.txt
|
||||
*.appx
|
||||
*.appxbundle
|
||||
*.appxupload
|
||||
|
||||
# Visual Studio cache files
|
||||
# files ending in .cache can be ignored
|
||||
*.[Cc]ache
|
||||
# but keep track of directories ending in .cache
|
||||
!?*.[Cc]ache/
|
||||
|
||||
# Others
|
||||
ClientBin/
|
||||
~$*
|
||||
*~
|
||||
*.dbmdl
|
||||
*.dbproj.schemaview
|
||||
*.jfm
|
||||
*.pfx
|
||||
*.publishsettings
|
||||
orleans.codegen.cs
|
||||
|
||||
# Including strong name files can present a security risk
|
||||
# (https://github.com/github/gitignore/pull/2483#issue-259490424)
|
||||
#*.snk
|
||||
|
||||
# Since there are multiple workflows, uncomment next line to ignore bower_components
|
||||
# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
|
||||
#bower_components/
|
||||
|
||||
# RIA/Silverlight projects
|
||||
Generated_Code/
|
||||
|
||||
# Backup & report files from converting an old project file
|
||||
# to a newer Visual Studio version. Backup files are not needed,
|
||||
# because we have git ;-)
|
||||
_UpgradeReport_Files/
|
||||
Backup*/
|
||||
UpgradeLog*.XML
|
||||
UpgradeLog*.htm
|
||||
ServiceFabricBackup/
|
||||
*.rptproj.bak
|
||||
|
||||
# SQL Server files
|
||||
*.mdf
|
||||
*.ldf
|
||||
*.ndf
|
||||
|
||||
# Business Intelligence projects
|
||||
*.rdl.data
|
||||
*.bim.layout
|
||||
*.bim_*.settings
|
||||
*.rptproj.rsuser
|
||||
*- [Bb]ackup.rdl
|
||||
*- [Bb]ackup ([0-9]).rdl
|
||||
*- [Bb]ackup ([0-9][0-9]).rdl
|
||||
|
||||
# Microsoft Fakes
|
||||
FakesAssemblies/
|
||||
|
||||
# GhostDoc plugin setting file
|
||||
*.GhostDoc.xml
|
||||
|
||||
# Node.js Tools for Visual Studio
|
||||
.ntvs_analysis.dat
|
||||
node_modules/
|
||||
|
||||
# Visual Studio 6 build log
|
||||
*.plg
|
||||
|
||||
# Visual Studio 6 workspace options file
|
||||
*.opt
|
||||
|
||||
# Visual Studio 6 auto-generated workspace file (contains which files were open etc.)
|
||||
*.vbw
|
||||
|
||||
# Visual Studio LightSwitch build output
|
||||
**/*.HTMLClient/GeneratedArtifacts
|
||||
**/*.DesktopClient/GeneratedArtifacts
|
||||
**/*.DesktopClient/ModelManifest.xml
|
||||
**/*.Server/GeneratedArtifacts
|
||||
**/*.Server/ModelManifest.xml
|
||||
_Pvt_Extensions
|
||||
|
||||
# Paket dependency manager
|
||||
.paket/paket.exe
|
||||
paket-files/
|
||||
|
||||
# FAKE - F# Make
|
||||
.fake/
|
||||
|
||||
# CodeRush personal settings
|
||||
.cr/personal
|
||||
|
||||
# Python Tools for Visual Studio (PTVS)
|
||||
__pycache__/
|
||||
*.pyc
|
||||
|
||||
# Cake - Uncomment if you are using it
|
||||
# tools/**
|
||||
# !tools/packages.config
|
||||
|
||||
# Tabs Studio
|
||||
*.tss
|
||||
|
||||
# Telerik's JustMock configuration file
|
||||
*.jmconfig
|
||||
|
||||
# BizTalk build output
|
||||
*.btp.cs
|
||||
*.btm.cs
|
||||
*.odx.cs
|
||||
*.xsd.cs
|
||||
|
||||
# OpenCover UI analysis results
|
||||
OpenCover/
|
||||
|
||||
# Azure Stream Analytics local run output
|
||||
ASALocalRun/
|
||||
|
||||
# MSBuild Binary and Structured Log
|
||||
*.binlog
|
||||
|
||||
# NVidia Nsight GPU debugger configuration file
|
||||
*.nvuser
|
||||
|
||||
# MFractors (Xamarin productivity tool) working folder
|
||||
.mfractor/
|
||||
|
||||
# Local History for Visual Studio
|
||||
.localhistory/
|
||||
|
||||
# BeatPulse healthcheck temp database
|
||||
healthchecksdb
|
||||
|
||||
# Backup folder for Package Reference Convert tool in Visual Studio 2017
|
||||
MigrationBackup/
|
||||
|
||||
# Ionide (cross platform F# VS Code tools) working folder
|
||||
.ionide/
|
||||
|
||||
# Fody - auto-generated XML schema
|
||||
FodyWeavers.xsd
|
||||
|
||||
# CMake
|
||||
build/
|
||||
|
||||
# Custom
|
||||
results/
|
||||
@@ -0,0 +1,88 @@
|
||||
# Требуем CMake не старее версии 3.20.
|
||||
cmake_minimum_required(VERSION 3.20)
|
||||
|
||||
# Создаём проект на языке C++.
|
||||
project(mmps_homework_1 LANGUAGES CXX)
|
||||
|
||||
# Используем стандарт C++17. Он нужен хосту для std::filesystem.
|
||||
set(CMAKE_CXX_STANDARD 17)
|
||||
# Запрещаем CMake использовать более старый стандарт.
|
||||
set(CMAKE_CXX_STANDARD_REQUIRED ON)
|
||||
# Отключаем нестандартные расширения конкретного компилятора.
|
||||
set(CMAKE_CXX_EXTENSIONS OFF)
|
||||
|
||||
# Создаём основную программу. Она ищет и загружает плагины во время выполнения.
|
||||
add_executable(mmps_host src/main.cpp)
|
||||
|
||||
# Позволяем подключать общий интерфейс как #include "api.hpp".
|
||||
target_include_directories(mmps_host PRIVATE include)
|
||||
|
||||
# В Linux функции dlopen, dlsym и dlclose могут требовать библиотеку libdl.
|
||||
# В Windows LoadLibraryW/GetProcAddress предоставляются системой, поэтому
|
||||
# дополнительная библиотека для компоновки не нужна.
|
||||
if(UNIX AND NOT APPLE)
|
||||
target_link_libraries(mmps_host PRIVATE ${CMAKE_DL_LIBS})
|
||||
endif()
|
||||
|
||||
# Складываем исполняемый файл в build/bin.
|
||||
set_target_properties(mmps_host PROPERTIES
|
||||
RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
|
||||
)
|
||||
|
||||
# Функция создаёт один плагин-решатель из переданного исходного файла.
|
||||
function(add_mmps_solver_plugin target source)
|
||||
# MODULE означает динамически загружаемый модуль:
|
||||
# DLL в Windows, SO в Linux и DYLIB в macOS.
|
||||
add_library(${target} MODULE ${source})
|
||||
|
||||
# Плагину доступны общие структуры, типы функций и имена символов из api.hpp,
|
||||
# а также вспомогательные функции численных методов из state.hpp.
|
||||
target_include_directories(${target} PRIVATE include)
|
||||
|
||||
# PLUGIN_BUILD включает __declspec(dllexport) при сборке DLL в Windows.
|
||||
# Определение PRIVATE и потому не передаётся другим целям.
|
||||
target_compile_definitions(${target} PRIVATE PLUGIN_BUILD)
|
||||
|
||||
# PREFIX "" убирает стандартный префикс lib у имени плагина.
|
||||
# Все плагины складываются в общий каталог build/plugins.
|
||||
set_target_properties(${target} PROPERTIES
|
||||
PREFIX ""
|
||||
LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/plugins"
|
||||
RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/plugins"
|
||||
)
|
||||
endfunction()
|
||||
|
||||
# Каждый метод собирается в отдельную динамическую библиотеку.
|
||||
add_mmps_solver_plugin(
|
||||
runge_kutta_plugin
|
||||
plugins/runge_kutta_plugin.cpp
|
||||
)
|
||||
|
||||
add_mmps_solver_plugin(
|
||||
adams_bashforth_plugin
|
||||
plugins/adams_bashforth_plugin.cpp
|
||||
)
|
||||
|
||||
|
||||
# ЧТО ПРОИСХОДИТ ПРИ СБОРКЕ
|
||||
# src/main.cpp -> mmps_host.exe
|
||||
# plugins/runge_kutta_plugin.cpp -> runge_kutta_plugin.dll
|
||||
# plugins/adams_bashforth_plugin.cpp -> adams_bashforth_plugin.dll
|
||||
#
|
||||
# Хост и плагины собираются независимо. Здесь намеренно нет команд:
|
||||
# target_link_libraries(mmps_host PRIVATE runge_kutta_plugin)
|
||||
# target_link_libraries(mmps_host PRIVATE adams_bashforth_plugin)
|
||||
#
|
||||
# Поэтому в mmps_host не записываются обязательные зависимости от конкретных
|
||||
# решателей. При запуске хост просматривает заданный каталог, загружает каждый
|
||||
# подходящий файл через LoadLibraryW/dlopen и ищет функции по контракту api.hpp.
|
||||
# Добавление ещё одного совместимого решателя не требует изменения main.cpp.
|
||||
#
|
||||
# ПРИМЕР СБОРКИ
|
||||
# cmake -S . -B build
|
||||
# cmake --build build --config Release
|
||||
#
|
||||
# ПРИМЕР ЗАПУСКА ИЗ КАТАЛОГА build
|
||||
# bin/Release/mmps_host.exe (Visual Studio)
|
||||
# bin/mmps_host (Linux/Makefiles)
|
||||
# Каталог плагинов и значения k1, k2, h программа запросит через std::cin.
|
||||
@@ -0,0 +1,45 @@
|
||||
#pragma once
|
||||
|
||||
#include <cstddef>
|
||||
#include <cstdint>
|
||||
|
||||
struct SolverParameters{
|
||||
double k1;
|
||||
double k2;
|
||||
double t_begin;
|
||||
double t_end;
|
||||
double step;
|
||||
};
|
||||
|
||||
struct SolutionPoint{
|
||||
double t;
|
||||
double x1;
|
||||
double x2;
|
||||
double x3;
|
||||
};
|
||||
|
||||
inline constexpr std::uint32_t PLUGIN_API_VERSION = 1;
|
||||
|
||||
#if defined(_WIN32) && defined(PLUGIN_BUILD)
|
||||
#define PLUGIN_EXPORT extern "C" __declspec(dllexport)
|
||||
#elif defined(_WIN32)
|
||||
#define PLUGIN_EXPORT extern "C"
|
||||
#else
|
||||
#define PLUGIN_EXPORT extern "C" __attribute__((visibility("default")))
|
||||
#endif
|
||||
|
||||
using plugin_api_version_fn = std::uint32_t (*)();
|
||||
using plugin_text_fn = const char* (*)();
|
||||
using function_run_fn = void (*)(
|
||||
const SolverParameters*,
|
||||
SolutionPoint*,
|
||||
std::size_t
|
||||
);
|
||||
|
||||
inline constexpr const char* SYMBOL_API_VERSION =
|
||||
"plugin_api_version";
|
||||
inline constexpr const char* SYMBOL_NAME = "plugin_name";
|
||||
inline constexpr const char* SYMBOL_DESCRIPTION =
|
||||
"plugin_description";
|
||||
inline constexpr const char* SYMBOL_FUNCTION = "func";
|
||||
|
||||
@@ -0,0 +1,52 @@
|
||||
#pragma once
|
||||
|
||||
#include "api.hpp"
|
||||
|
||||
struct State
|
||||
{
|
||||
double x1;
|
||||
double x2;
|
||||
double x3;
|
||||
};
|
||||
|
||||
inline State add_scaled(const State& left, const State& right, double scale){
|
||||
return {
|
||||
left.x1 + scale * right.x1,
|
||||
left.x2 + scale * right.x2,
|
||||
left.x3 + scale * right.x3,
|
||||
};
|
||||
}
|
||||
|
||||
// СОДУ
|
||||
inline State derivative(const State& state,
|
||||
const SolverParameters& parameters){
|
||||
return {
|
||||
-parameters.k1 * state.x1,
|
||||
parameters.k1 * state.x1 - parameters.k2 * state.x2,
|
||||
parameters.k2 * state.x2
|
||||
};
|
||||
}
|
||||
|
||||
inline State runge_kutta_step(const State& state,
|
||||
const SolverParameters& parameters){
|
||||
double h = parameters.step;
|
||||
|
||||
State k1 = derivative(state, parameters);
|
||||
State k2 = derivative(add_scaled(state, k1, h / 2), parameters);
|
||||
State k3 = derivative(add_scaled(state, k2, h / 2), parameters);
|
||||
State k4 = derivative(add_scaled(state, k3, h), parameters);
|
||||
|
||||
return {
|
||||
state.x1 + h / 6.0 * (k1.x1 + 2 * k2.x1 + 2 * k3.x1 + k4.x1),
|
||||
state.x2 + h / 6.0 * (k1.x2 + 2 * k2.x2 + 2 * k3.x2 + k4.x2),
|
||||
state.x3 + h / 6.0 * (k1.x3 + 2 * k2.x3 + 2 * k3.x3 + k4.x3)
|
||||
};
|
||||
}
|
||||
|
||||
inline State state_from_point(const SolutionPoint& point){
|
||||
return { point.x1, point.x2, point.x3 };
|
||||
}
|
||||
|
||||
inline SolutionPoint make_step(double t, const State& state){
|
||||
return { t, state.x1, state.x2, state.x3 };
|
||||
}
|
||||
@@ -0,0 +1,53 @@
|
||||
#include "api.hpp"
|
||||
#include "state.hpp"
|
||||
|
||||
#include <cstddef>
|
||||
|
||||
PLUGIN_EXPORT std::uint32_t plugin_api_version(){
|
||||
return PLUGIN_API_VERSION;
|
||||
}
|
||||
|
||||
PLUGIN_EXPORT const char* plugin_name(){
|
||||
return "Adams-Bashforth 2";
|
||||
}
|
||||
|
||||
PLUGIN_EXPORT const char* plugin_description(){
|
||||
return "Explicit second-order Adams-Bashforth method with an RK4 start";
|
||||
}
|
||||
|
||||
PLUGIN_EXPORT void func(const SolverParameters* parameters,
|
||||
SolutionPoint* output,
|
||||
std::size_t output_size){
|
||||
if (parameters == nullptr || output == nullptr || output_size == 0)
|
||||
return;
|
||||
|
||||
const State initial_state{1.0, 0.0, 0.0};
|
||||
output[0] = make_step(parameters->t_begin, initial_state);
|
||||
|
||||
if (output_size == 1)
|
||||
return;
|
||||
|
||||
State first_state = runge_kutta_step(initial_state, *parameters);
|
||||
output[1] = make_step(parameters->t_begin + parameters->step, first_state);
|
||||
|
||||
for (std::size_t index = 1; index + 1 < output_size; ++index){
|
||||
State current = state_from_point(output[index]);
|
||||
State previous = state_from_point(output[index - 1]);
|
||||
State current_derivative = derivative(current, *parameters);
|
||||
State previous_derivative = derivative(previous, *parameters);
|
||||
double h = parameters->step;
|
||||
|
||||
State next{
|
||||
current.x1 + h * (1.5 * current_derivative.x1 -
|
||||
0.5 * previous_derivative.x1),
|
||||
current.x2 + h * (1.5 * current_derivative.x2 -
|
||||
0.5 * previous_derivative.x2),
|
||||
current.x3 + h * (1.5 * current_derivative.x3 -
|
||||
0.5 * previous_derivative.x3),
|
||||
};
|
||||
|
||||
const double next_time = parameters->t_begin +
|
||||
static_cast<double>(index + 1) * h;
|
||||
output[index + 1] = make_step(next_time, next);
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,33 @@
|
||||
#include "api.hpp"
|
||||
#include "state.hpp"
|
||||
|
||||
#include <cstddef>
|
||||
|
||||
PLUGIN_EXPORT std::uint32_t plugin_api_version(){
|
||||
return PLUGIN_API_VERSION;
|
||||
}
|
||||
|
||||
PLUGIN_EXPORT const char* plugin_name(){
|
||||
return "Runge-Kutta 4";
|
||||
}
|
||||
|
||||
PLUGIN_EXPORT const char* plugin_description(){
|
||||
return "Explicit fourth-order Runge-Kutta method";
|
||||
}
|
||||
|
||||
PLUGIN_EXPORT void func(const SolverParameters* parameters,
|
||||
SolutionPoint* output,
|
||||
std::size_t output_size){
|
||||
if (parameters == nullptr || output == nullptr || output_size == 0)
|
||||
return;
|
||||
|
||||
State state{1, 0, 0};
|
||||
output[0] = make_step(parameters->t_begin, state);
|
||||
|
||||
for (std::size_t index = 1; index < output_size; ++index){
|
||||
state = runge_kutta_step(state, *parameters);
|
||||
const double t = parameters->t_begin +
|
||||
static_cast<double>(index) * parameters->step;
|
||||
output[index] = make_step(t, state);
|
||||
}
|
||||
}
|
||||
+276
@@ -0,0 +1,276 @@
|
||||
#include "api.hpp"
|
||||
|
||||
#include <algorithm>
|
||||
#include <cctype>
|
||||
#include <cmath>
|
||||
#include <cstddef>
|
||||
#include <filesystem>
|
||||
#include <fstream>
|
||||
#include <iomanip>
|
||||
#include <iostream>
|
||||
#include <limits>
|
||||
#include <locale>
|
||||
#include <stdexcept>
|
||||
#include <string>
|
||||
#include <vector>
|
||||
|
||||
#if defined(_WIN32)
|
||||
#include <windows.h>
|
||||
#else
|
||||
#include <dlfcn.h>
|
||||
#endif
|
||||
|
||||
namespace fs = std::filesystem;
|
||||
|
||||
std::string path_text(const fs::path& path){
|
||||
return path.u8string();
|
||||
}
|
||||
|
||||
class SharedLibrary
|
||||
{
|
||||
public:
|
||||
explicit SharedLibrary(const fs::path& path)
|
||||
{
|
||||
#if defined(_WIN32)
|
||||
handle_ = LoadLibraryW(path.c_str());
|
||||
if (handle_ == nullptr){
|
||||
throw std::runtime_error(
|
||||
"LoadLibraryW failed with error " +
|
||||
std::to_string(GetLastError()));
|
||||
}
|
||||
#else
|
||||
handle_ = dlopen(path.c_str(), RTLD_NOW | RTLD_LOCAL);
|
||||
if (handle_ == nullptr)
|
||||
{
|
||||
const char* error = dlerror();
|
||||
throw std::runtime_error(error == nullptr ? "dlopen failed" : error);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
SharedLibrary(const SharedLibrary&) = delete;
|
||||
SharedLibrary& operator=(const SharedLibrary&) = delete;
|
||||
|
||||
~SharedLibrary()
|
||||
{
|
||||
#if defined(_WIN32)
|
||||
if (handle_ != nullptr)
|
||||
FreeLibrary(handle_);
|
||||
#else
|
||||
if (handle_ != nullptr)
|
||||
dlclose(handle_);
|
||||
#endif
|
||||
}
|
||||
|
||||
template <class FunctionPointer>
|
||||
FunctionPointer require(const char* symbol_name) const
|
||||
{
|
||||
#if defined(_WIN32)
|
||||
const auto address = GetProcAddress(handle_, symbol_name);
|
||||
if (address == nullptr)
|
||||
throw std::runtime_error(std::string("missing symbol: ") + symbol_name);
|
||||
#else
|
||||
dlerror();
|
||||
void* address = dlsym(handle_, symbol_name);
|
||||
const char* error = dlerror();
|
||||
if (error != nullptr)
|
||||
{
|
||||
throw std::runtime_error(
|
||||
std::string("missing symbol: ") + symbol_name + " (" + error + ")");
|
||||
}
|
||||
#endif
|
||||
return reinterpret_cast<FunctionPointer>(address);
|
||||
}
|
||||
|
||||
private:
|
||||
#if defined(_WIN32)
|
||||
HMODULE handle_ = nullptr;
|
||||
#else
|
||||
void* handle_ = nullptr;
|
||||
#endif
|
||||
};
|
||||
|
||||
bool is_library_candidate(const fs::path& path)
|
||||
{
|
||||
std::string extension = path.extension().string();
|
||||
std::transform(extension.begin(), extension.end(), extension.begin(),
|
||||
[](unsigned char character) {
|
||||
return static_cast<char>(std::tolower(character));
|
||||
});
|
||||
|
||||
#if defined(_WIN32)
|
||||
return extension == ".dll";
|
||||
#elif defined(__APPLE__)
|
||||
return extension == ".dylib" || extension == ".so";
|
||||
#else
|
||||
return extension == ".so";
|
||||
#endif
|
||||
}
|
||||
|
||||
std::vector<fs::path> find_candidates(const fs::path& directory){
|
||||
std::vector<fs::path> candidates;
|
||||
|
||||
if (!fs::exists(directory) || !fs::is_directory(directory))
|
||||
return candidates;
|
||||
|
||||
for (const auto& entry : fs::directory_iterator(directory)){
|
||||
if (entry.is_regular_file() && is_library_candidate(entry.path()))
|
||||
candidates.push_back(fs::absolute(entry.path()));
|
||||
}
|
||||
|
||||
std::sort(candidates.begin(), candidates.end());
|
||||
return candidates;
|
||||
}
|
||||
|
||||
size_t calculate_point_count(const SolverParameters& parameters){
|
||||
const size_t max_point_count = 1000000;
|
||||
double interval = parameters.t_end - parameters.t_begin;
|
||||
double step_count = std::floor(interval / parameters.step + 1e-12);
|
||||
|
||||
if (!std::isfinite(step_count) || step_count > static_cast<double>(max_point_count - 1))
|
||||
throw std::runtime_error("the selected h creates too many solution points");
|
||||
|
||||
return static_cast<size_t>(step_count) + 1;
|
||||
}
|
||||
|
||||
void validate_solution(const std::vector<SolutionPoint>& solution,
|
||||
const SolverParameters& parameters)
|
||||
{
|
||||
for (size_t index = 0; index < solution.size(); ++index)
|
||||
{
|
||||
const SolutionPoint& point = solution[index];
|
||||
if (!std::isfinite(point.t) || !std::isfinite(point.x1) ||
|
||||
!std::isfinite(point.x2) || !std::isfinite(point.x3))
|
||||
throw std::runtime_error("solver returned a non-finite value");
|
||||
|
||||
const double expected_time = parameters.t_begin +
|
||||
static_cast<double>(index) * parameters.step;
|
||||
const double tolerance =
|
||||
1e-10 * (std::max)(1.0, std::abs(expected_time));
|
||||
if (std::abs(point.t - expected_time) > tolerance)
|
||||
throw std::runtime_error("solver returned an invalid time grid");
|
||||
}
|
||||
}
|
||||
|
||||
void write_csv(const fs::path& path, const std::vector<SolutionPoint>& solution){
|
||||
std::ofstream stream(path);
|
||||
if (!stream)
|
||||
throw std::runtime_error("cannot create CSV file: " + path_text(path));
|
||||
|
||||
stream << std::setprecision(4);
|
||||
stream << "t,x1,x2,x3\n";
|
||||
|
||||
for (const SolutionPoint& point : solution){
|
||||
stream << point.t << ',' << point.x1 << ','
|
||||
<< point.x2 << ',' << point.x3 << '\n';
|
||||
}
|
||||
}
|
||||
|
||||
void inspect_and_run(const fs::path& library_path,
|
||||
const SolverParameters& parameters,
|
||||
size_t point_count,
|
||||
const fs::path& result_directory){
|
||||
SharedLibrary library(library_path);
|
||||
|
||||
const auto api_version = library.require<plugin_api_version_fn>(SYMBOL_API_VERSION);
|
||||
if (api_version() != PLUGIN_API_VERSION)
|
||||
throw std::runtime_error("unsupported API version " + std::to_string(api_version()));
|
||||
|
||||
const auto name = library.require<plugin_text_fn>(SYMBOL_NAME);
|
||||
const auto description = library.require<plugin_text_fn>(SYMBOL_DESCRIPTION);
|
||||
const auto function = library.require<function_run_fn>(SYMBOL_FUNCTION);
|
||||
|
||||
const char* plugin_name = name();
|
||||
const char* plugin_description = description();
|
||||
if (plugin_name == nullptr || plugin_description == nullptr)
|
||||
throw std::runtime_error("plugin returned null metadata");
|
||||
|
||||
std::vector<SolutionPoint> solution(point_count, SolutionPoint{0, 0, 0, 0});
|
||||
|
||||
function(¶meters, solution.data(), solution.size());
|
||||
validate_solution(solution, parameters);
|
||||
|
||||
fs::path csv_filename = library_path.stem();
|
||||
csv_filename += ".csv";
|
||||
const fs::path csv_path = result_directory / csv_filename;
|
||||
write_csv(csv_path, solution);
|
||||
|
||||
std::cout << "[accepted] " << path_text(library_path.filename()) << '\n'
|
||||
<< " name: " << plugin_name << '\n'
|
||||
<< " description: " << plugin_description << '\n'
|
||||
<< " points: " << solution.size() << '\n'
|
||||
<< " CSV: " << path_text(csv_path) << '\n';
|
||||
}
|
||||
|
||||
int main()
|
||||
{
|
||||
SolverParameters parameters{};
|
||||
std::string plugin_directory_text;
|
||||
parameters.t_begin = 0.0;
|
||||
parameters.t_end = 10.0;
|
||||
|
||||
try {
|
||||
std::cout << "Enter plugin directory: ";
|
||||
if (!std::getline(std::cin, plugin_directory_text) || plugin_directory_text.empty())
|
||||
throw std::runtime_error("failed to read plugin directory");
|
||||
|
||||
const fs::path plugin_directory = fs::path(plugin_directory_text);
|
||||
|
||||
std::cout << "Enter k1 [1e-5, 1e2], k2 [1e-2, 1] and h: ";
|
||||
|
||||
if (!(std::cin >> parameters.k1 >> parameters.k2 >> parameters.step))
|
||||
throw std::runtime_error("failed to read k1, k2 and h");
|
||||
|
||||
if (parameters.k1 < 1e-5 || parameters.k1 > 1e2)
|
||||
throw std::runtime_error("k1 must be in [1e-5, 1e2]");
|
||||
if (parameters.k2 < 1e-2 || parameters.k2 > 1.0)
|
||||
throw std::runtime_error("k2 must be in [1e-2, 1]");
|
||||
|
||||
if (parameters.step <= 0.0)
|
||||
throw std::runtime_error("h must be a positive finite number");
|
||||
if (parameters.step > parameters.t_end - parameters.t_begin)
|
||||
throw std::runtime_error("h must not exceed the calculation interval");
|
||||
|
||||
const size_t point_count = calculate_point_count(parameters);
|
||||
|
||||
std::cout << "Plugin directory: " << path_text(plugin_directory) << '\n'
|
||||
<< "Parameters: k1=" << parameters.k1
|
||||
<< ", k2=" << parameters.k2
|
||||
<< ", h=" << parameters.step << '\n';
|
||||
|
||||
const auto candidates = find_candidates(plugin_directory);
|
||||
if (candidates.empty()){
|
||||
std::cout << "No plugin candidates found. Calculation is impossible.\n";
|
||||
return 0;
|
||||
}
|
||||
|
||||
const fs::path result_directory = fs::current_path() / "results";
|
||||
fs::create_directories(result_directory);
|
||||
|
||||
size_t accepted = 0;
|
||||
for (const fs::path& candidate : candidates){
|
||||
try {
|
||||
inspect_and_run(candidate, parameters, point_count,
|
||||
result_directory);
|
||||
accepted++;
|
||||
}
|
||||
catch (const std::exception& error){
|
||||
std::cerr << "[rejected] " << path_text(candidate.filename())
|
||||
<< ": " << error.what() << '\n';
|
||||
}
|
||||
}
|
||||
|
||||
std::cout << "Accepted solver plugins: " << accepted << " of " << candidates.size() << '\n';
|
||||
|
||||
if (accepted == 0){
|
||||
std::cout << "No available solver methods. Calculation is impossible.\n";
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
catch (const std::exception& error){
|
||||
std::cerr << "Error: " << error.what() << '\n';
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
Reference in new issue
Block a user