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‎.clang-format

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---
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Language: Cpp
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# BasedOnStyle: LLVM
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AccessModifierOffset: -4
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AlignAfterOpenBracket: true
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AlignEscapedNewlinesLeft: false
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AlignOperands: true
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AlignTrailingComments: false
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AllowAllParametersOfDeclarationOnNextLine: true
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AllowShortBlocksOnASingleLine: false
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AllowShortCaseLabelsOnASingleLine: false
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AllowShortIfStatementsOnASingleLine: false
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AllowShortLoopsOnASingleLine: false
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AllowShortFunctionsOnASingleLine: Inline
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AlwaysBreakAfterDefinitionReturnType: false
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AlwaysBreakTemplateDeclarations: false
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AlwaysBreakBeforeMultilineStrings: false
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BreakBeforeBinaryOperators: None
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BreakBeforeTernaryOperators: true
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BreakConstructorInitializersBeforeComma: false
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BinPackParameters: true
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BinPackArguments: true
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ColumnLimit: 110
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ConstructorInitializerAllOnOneLineOrOnePerLine: true
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ConstructorInitializerIndentWidth: 4
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DerivePointerAlignment: false
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ExperimentalAutoDetectBinPacking: false
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IndentCaseLabels: true
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IndentWrappedFunctionNames: false
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IndentFunctionDeclarationAfterType: false
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MaxEmptyLinesToKeep: 3
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KeepEmptyLinesAtTheStartOfBlocks: true
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NamespaceIndentation: None
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ObjCBlockIndentWidth: 2
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ObjCSpaceAfterProperty: false
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ObjCSpaceBeforeProtocolList: true
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PenaltyBreakBeforeFirstCallParameter: 19
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PenaltyBreakComment: 300
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PenaltyBreakString: 1000
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PenaltyBreakFirstLessLess: 120
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PenaltyExcessCharacter: 1000000
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PenaltyReturnTypeOnItsOwnLine: 60
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PointerAlignment: Left
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SpacesBeforeTrailingComments: 2
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Cpp11BracedListStyle: true
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Standard: Cpp11
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IndentWidth: 4
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TabWidth: 8
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UseTab: Never
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BreakBeforeBraces: Attach
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SpacesInParentheses: false
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SpacesInSquareBrackets: false
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SpacesInAngles: false
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SpaceInEmptyParentheses: false
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SpacesInCStyleCastParentheses: false
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SpaceAfterCStyleCast: false
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SpacesInContainerLiterals: true
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SpaceBeforeAssignmentOperators: true
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ContinuationIndentWidth: 4
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CommentPragmas: '^ IWYU pragma:'
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ForEachMacros: [ foreach, Q_FOREACH, BOOST_FOREACH ]
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SpaceBeforeParens: ControlStatements
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DisableFormat: false
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#SortIncludes: false
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...

‎.gitignore

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*.kdev4
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*~

‎CMakeLists.txt

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cmake_minimum_required(VERSION 2.8)
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project(embed_julia)
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set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}")
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find_package(Julia)
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add_definitions(${Julia_DEFINITIONS})
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include_directories(${Julia_INCLUDE_DIRS})
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link_directories(${Julia_LIBRARY_DIRS})
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add_executable(embedding_julia embedding.cpp)
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target_link_libraries(embedding_julia ${Julia_LIBRARIES})

‎FindJulia.cmake

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#.rst:
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# FindJulia
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# ---------
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#
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# Finds Julia library for embedding
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#
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# This will define the following variables::
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#
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# Julia_FOUND - True if the system has Julia
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# Julia_VERSION - The version of Julia which was found
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#
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find_program(Julia_EXECUTABLE julia DOC "Julia executable")
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if(NOT Julia_EXECUTABLE)
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return()
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endif()
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execute_process(
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COMMAND ${Julia_EXECUTABLE} --version
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OUTPUT_VARIABLE Julia_VERSION
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RESULT_VARIABLE RESULT
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)
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if(RESULT EQUAL 0)
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string(REGEX REPLACE ".*([0-9]+\\.[0-9]+\\.[0-9]+).*" "\\1"
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Julia_VERSION ${Julia_VERSION})
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endif()
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execute_process(
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COMMAND ${Julia_EXECUTABLE} -e "print(JULIA_HOME)"
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OUTPUT_VARIABLE Julia_HOME
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RESULT_VARIABLE RESULT
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)
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get_filename_component(Julia_DIR ${Julia_HOME} DIRECTORY)
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set(Julia_DEFINITIONS -fPIC -DJULIA_INIT_DIR="${Julia_HOME}")
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set(Julia_INCLUDE_DIRS ${Julia_DIR}/include/julia)
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set(Julia_LIBRARY_DIRS ${Julia_DIR}/lib ${Julia_DIR}/lib/julia)
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find_library( Julia_LIBRARIES
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NAMES julia
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PATHS ${Julia_LIBRARY_DIRS}
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)
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(Julia
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FOUND_VAR Julia_FOUND
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REQUIRED_VARS
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Julia_DIR
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Julia_HOME
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Julia_EXECUTABLE
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Julia_DEFINITIONS
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Julia_INCLUDE_DIRS
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Julia_LIBRARIES
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Julia_LIBRARY_DIRS
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VERSION_VAR Julia_VERSION
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)

‎LICENSE.md

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The MIT License (MIT)
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Copyright (c) 2016 Cristóvão D. Sousa
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.

‎README.md

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# embedding_julia
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Trying to call a Julia function from C++ as a native C function.

‎embedding.cpp

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#include <iostream>
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#include <julia.h>
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int main(int argc, char* argv[]) {
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static const int N = 10;
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double a[N];
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/* required: setup the Julia context */
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jl_init(JULIA_INIT_DIR);
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//////////// Usual stuff
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/* run Julia commands */
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jl_eval_string("println(sqrt(2.0))");
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jl_value_t* array_type = jl_apply_array_type(jl_float64_type, 1);
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jl_array_t* a_jl = jl_ptr_to_array_1d(array_type, a, N, 0);
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jl_eval_string("function g(a) \n a[:] = 1:length(a) \nend");
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jl_call1(jl_get_function(jl_main_module, "g"), (jl_value_t*)a_jl);
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jl_eval_string("f(x) = x .^ 2");
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jl_function_t* func = jl_get_function(jl_main_module, "f");
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for (int i = 0; i < N; ++i) {
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double ret = jl_unbox_float64(jl_call1(func, jl_box_float64(a[i])));
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std::cout << ret << std::endl;
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}
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std::cout << std::endl;
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//////////// Getting a native function pointer to a Julia function
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jl_eval_string("f(x::Int)::Int = 2x");
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int (*f)(int) = (int (*)(int))(jl_unbox_voidpointer(jl_eval_string("cfunction(f, Int, (Int,))")));
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std::cout << "This is really nice! " << f(123) << std::endl;
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// jl_eval_string("@code_native f(123)");
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// jl_eval_string("this_function_does_not_exist()");
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if (jl_exception_occurred()) {
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jl_show(jl_stderr_obj(), jl_exception_occurred());
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jl_printf(jl_stderr_stream(), "\n");
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}
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/* strongly recommended: notify Julia that the
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program is about to terminate. this allows
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Julia time to cleanup pending write requests
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and run all finalizers
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*/
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jl_atexit_hook(0);
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std::cout << " ... Ok ... " << std::endl;
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return 0;
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}

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