require 'ffi' module PyBind module LibPython extend FFI::Library def self.find_libpython(python = nil) python ||= ENV['PYTHON'] || 'python' python_config = investigate_python_config(python) version = python_config[:VERSION] libprefix = FFI::Platform::LIBPREFIX libs = [] %i(INSTSONAME LDLIBRARY).each do |key| lib = python_config[key] libs << lib << File.basename(lib) if lib end if (lib = python_config[:LIBRARY]) libs << File.basename(lib, File.extname(lib)) end libs << "#{libprefix}python#{version}" << "#{libprefix}python" libs.uniq! executable = python_config[:EXECUTABLE] libpaths = [ python_config[:LIBDIR] ] if FFI::Platform.windows? libpaths << File.dirname(executable) else libpaths << File.expand_path('../../lib', executable) end libpaths << python_config[:PYTHONFRAMEWORKPREFIX] if FFI::Platform.mac? exec_prefix = python_config[:EXECPREFIX] libpaths << exec_prefix << File.join(exec_prefix, 'lib') libpaths.compact! unless ENV['PYTHONHOME'] # PYTHONHOME tells python where to look for both pure python and binary modules. # When it is set, it replaces both `prefix` and `exec_prefix` # and we thus need to set it to both in case they differ. # This is also what the documentation recommends. # However, they are documented to always be the same on Windows, # where it causes problems if we try to include both. if FFI::Platform.windows? ENV['PYTHONHOME'] = exec_prefix else ENV['PYTHONHOME'] = [python_config[:PREFIX], exec_prefix].join(':') end # Unfortunately, setting PYTHONHOME screws up Canopy's Python distribution? unless system(python, '-c', 'import site', out: File::NULL, err: File::NULL) ENV['PYTHONHOME'] = nil end end # Try LIBPYTHON environment variable first. if ENV['LIBPYTHON'] if File.file?(ENV['LIBPYTHON']) begin libs = ffi_lib(ENV['LIBPYTHON']) return libs.first rescue LoadError end end $stderr.puts '[WARN] Ignore the wrong libpython location specified in LIBPYTHON environment variable.' end # Find libpython (we hope): libsuffix = FFI::Platform::LIBSUFFIX multiarch = python_config[:MULTIARCH] || python_config[:IMPLEMENTATIONMULTIARCH] dir_sep = File::ALT_SEPARATOR || File::SEPARATOR libs.each do |lib| libpaths.each do |libpath| # NOTE: File.join doesn't use File::ALT_SEPARATOR libpath_libs = [ [libpath, lib].join(dir_sep) ] libpath_libs << [libpath, multiarch, lib].join(dir_sep) if multiarch libpath_libs.each do |libpath_lib| [ libpath_lib, "#{libpath_lib}.#{libsuffix}" ].each do |fullname| next unless File.file?(fullname) begin libs = ffi_lib(fullname) return libs.first rescue LoadError # skip load error end end end end end end def self.investigate_python_config(python) python_env = { 'PYTHONIOENCODING' => 'UTF-8' } IO.popen(python_env, [python, python_investigator_py], 'r') do |io| {}.tap do |config| io.each_line do |line| key, value = line.chomp.split(': ', 2) config[key.to_sym] = value if value != 'None' end end end end def self.python_investigator_py File.expand_path('../python/investigator.py', __FILE__) end ffi_lib_flags :lazy, :global libpython = find_libpython ENV['PYTHON'] # --- global variables --- attach_variable :_Py_NoneStruct, PyObjectStruct def self.Py_None _Py_NoneStruct end attach_variable :PyType_Type, PyObjectStruct if libpython.find_variable('PyInt_Type') has_PyInt_Type = true attach_variable :PyInt_Type, PyObjectStruct else has_PyInt_Type = false attach_variable :PyInt_Type, :PyLong_Type, PyObjectStruct end attach_variable :PyLong_Type, PyObjectStruct attach_variable :PyBool_Type, PyObjectStruct attach_variable :PyFloat_Type, PyObjectStruct attach_variable :PyComplex_Type, PyObjectStruct attach_variable :PyUnicode_Type, PyObjectStruct if libpython.find_symbol('PyString_FromStringAndSize') string_as_bytes = false attach_variable :PyString_Type, PyObjectStruct else string_as_bytes = true attach_variable :PyString_Type, :PyBytes_Type, PyObjectStruct end attach_variable :PyTuple_Type, PyObjectStruct attach_variable :PySlice_Type, PyObjectStruct attach_variable :PyList_Type, PyObjectStruct attach_variable :PyDict_Type, PyObjectStruct attach_variable :PySet_Type, PyObjectStruct attach_variable :PyFunction_Type, PyObjectStruct attach_variable :PyMethod_Type, PyObjectStruct # --- functions --- attach_function :Py_GetVersion, [], :string attach_function :Py_InitializeEx, [:int], :void attach_function :Py_IsInitialized, [], :int attach_function :PySys_SetArgvEx, [:int, :pointer, :int], :void # Reference count attach_function :Py_IncRef, [PyObjectStruct.by_ref], :void attach_function :Py_DecRef, [PyObjectStruct.by_ref], :void # Object attach_function :PyObject_RichCompare, [PyObjectStruct.by_ref, PyObjectStruct.by_ref, :int], PyObjectStruct.by_ref attach_function :PyObject_RichCompareBool, [PyObjectStruct.by_ref, PyObjectStruct.by_ref, :int], :int attach_function :PyObject_GetAttrString, [PyObjectStruct.by_ref, :string], PyObjectStruct.by_ref attach_function :PyObject_SetAttrString, [PyObjectStruct.by_ref, :string, PyObjectStruct.by_ref], :int attach_function :PyObject_HasAttrString, [PyObjectStruct.by_ref, :string], :int attach_function :PyObject_GetItem, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyObject_SetItem, [PyObjectStruct.by_ref, PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int attach_function :PyObject_DelItem, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int attach_function :PyObject_Call, [PyObjectStruct.by_ref, PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyObject_IsInstance, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int attach_function :PyObject_IsSubclass, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int attach_function :PyObject_Dir, [PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyObject_Repr, [PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyObject_Str, [PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyObject_Type, [PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyCallable_Check, [PyObjectStruct.by_ref], :int # PyObject_DelAttrString only avaliable in Python 3.x if libpython.find_symbol('PyObject_DelAttrString') attach_function :PyObject_DelAttrString, [PyObjectStruct.by_ref, :string], :int end # PyObject_Compare only avaliable in Python 2.x if libpython.find_symbol('PyObject_Compare') attach_function :PyObject_Compare, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int end # Bool attach_function :PyBool_FromLong, [:long], PyObjectStruct.by_ref attach_variable :_Py_TrueStruct, PyObjectStruct def self.Py_True _Py_TrueStruct end # _Py_ZeroStruct only avaliable in Python 2.x, use _Py_FalseStruct in Python 3.x if libpython.find_symbol('PyObject_Compare') attach_variable :_Py_ZeroStruct, PyObjectStruct def self.Py_False _Py_ZeroStruct end else attach_variable :_Py_FalseStruct, PyObjectStruct def self.Py_False _Py_FalseStruct end end # Integer if has_PyInt_Type attach_function :PyInt_AsSsize_t, [PyObjectStruct.by_ref], :ssize_t else attach_function :PyInt_AsSsize_t, :PyLong_AsSsize_t, [PyObjectStruct.by_ref], :ssize_t end if has_PyInt_Type attach_function :PyInt_FromSsize_t, [:ssize_t], PyObjectStruct.by_ref else attach_function :PyInt_FromSsize_t, :PyLong_FromSsize_t, [:ssize_t], PyObjectStruct.by_ref end # Float attach_function :PyFloat_FromDouble, [:double], PyObjectStruct.by_ref attach_function :PyFloat_AsDouble, [PyObjectStruct.by_ref], :double # Complex attach_function :PyComplex_RealAsDouble, [PyObjectStruct.by_ref], :double attach_function :PyComplex_ImagAsDouble, [PyObjectStruct.by_ref], :double # String if string_as_bytes attach_function :PyString_FromStringAndSize, :PyBytes_FromStringAndSize, [:string, :ssize_t], PyObjectStruct.by_ref else attach_function :PyString_FromStringAndSize, [:string, :ssize_t], PyObjectStruct.by_ref end # PyString_AsStringAndSize :: (PyPtr, char**, int*) -> int if string_as_bytes attach_function :PyString_AsStringAndSize, :PyBytes_AsStringAndSize, [PyObjectStruct.by_ref, :pointer, :pointer], :int else attach_function :PyString_AsStringAndSize, [PyObjectStruct.by_ref, :pointer, :pointer], :int end # Unicode # PyUnicode_DecodeUTF8 case when libpython.find_symbol('PyUnicode_DecodeUTF8') attach_function :PyUnicode_DecodeUTF8, [:string, :ssize_t, :string], PyObjectStruct.by_ref when libpython.find_symbol('PyUnicodeUCS4_DecodeUTF8') attach_function :PyUnicode_DecodeUTF8, :PyUnicodeUCS4_DecodeUTF8, [:string, :ssize_t, :string], PyObjectStruct.by_ref when libpython.find_symbol('PyUnicodeUCS2_DecodeUTF8') attach_function :PyUnicode_DecodeUTF8, :PyUnicodeUCS2_DecodeUTF8, [:string, :ssize_t, :string], PyObjectStruct.by_ref end # PyUnicode_AsUTF8String case when libpython.find_symbol('PyUnicode_AsUTF8String') attach_function :PyUnicode_AsUTF8String, [PyObjectStruct.by_ref], PyObjectStruct.by_ref when libpython.find_symbol('PyUnicodeUCS4_AsUTF8String') attach_function :PyUnicode_AsUTF8String, :PyUnicodeUCS4_AsUTF8String, [PyObjectStruct.by_ref], PyObjectStruct.by_ref when libpython.find_symbol('PyUnicodeUCS2_AsUTF8String') attach_function :PyUnicode_AsUTF8String, :PyUnicodeUCS2_AsUTF8String, [PyObjectStruct.by_ref], PyObjectStruct.by_ref end # Tuple attach_function :PyTuple_New, [:ssize_t], PyObjectStruct.by_ref attach_function :PyTuple_GetItem, [PyObjectStruct.by_ref, :ssize_t], PyObjectStruct.by_ref attach_function :PyTuple_SetItem, [PyObjectStruct.by_ref, :ssize_t, PyObjectStruct.by_ref], :int attach_function :PyTuple_Size, [PyObjectStruct.by_ref], :ssize_t # Slice attach_function :PySlice_New, [PyObjectStruct.by_ref, PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref # List attach_function :PyList_New, [:ssize_t], PyObjectStruct.by_ref attach_function :PyList_Size, [PyObjectStruct.by_ref], :ssize_t attach_function :PyList_GetItem, [PyObjectStruct.by_ref, :ssize_t], PyObjectStruct.by_ref attach_function :PyList_SetItem, [PyObjectStruct.by_ref, :ssize_t, PyObjectStruct.by_ref], :int attach_function :PyList_Append, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int # Sequence attach_function :PySequence_Size, [PyObjectStruct.by_ref], :ssize_t attach_function :PySequence_GetItem, [PyObjectStruct.by_ref, :ssize_t], PyObjectStruct.by_ref attach_function :PySequence_Contains, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int # Dict attach_function :PyDict_New, [], PyObjectStruct.by_ref attach_function :PyDict_GetItem, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyDict_GetItemString, [PyObjectStruct.by_ref, :string], PyObjectStruct.by_ref attach_function :PyDict_SetItem, [PyObjectStruct.by_ref, PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int attach_function :PyDict_SetItemString, [PyObjectStruct.by_ref, :string, PyObjectStruct.by_ref], :int attach_function :PyDict_DelItem, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int attach_function :PyDict_DelItem, [PyObjectStruct.by_ref, :string], :int attach_function :PyDict_Size, [PyObjectStruct.by_ref], :ssize_t attach_function :PyDict_Keys, [PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyDict_Values, [PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyDict_Items, [PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyDict_Contains, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int # Set attach_function :PySet_Size, [PyObjectStruct.by_ref], :ssize_t attach_function :PySet_Contains, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int attach_function :PySet_Add, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int attach_function :PySet_Discard, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], :int # Module attach_function :PyModule_GetDict, [PyObjectStruct.by_ref], PyObjectStruct.by_ref # Import attach_function :PyImport_ImportModule, [:string], PyObjectStruct.by_ref # Operators attach_function :PyNumber_Add, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_Subtract, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_Multiply, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_TrueDivide, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_Remainder, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_Power, [PyObjectStruct.by_ref, PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_Lshift, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_Rshift, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_And, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_Xor, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_Or, [PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_Positive, [PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_Negative, [PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyNumber_Invert, [PyObjectStruct.by_ref], PyObjectStruct.by_ref attach_function :PyObject_Not, [PyObjectStruct.by_ref], :int # Compiler attach_function :Py_CompileString, [:string, :string, :int], PyObjectStruct.by_ref attach_function :PyEval_EvalCode, [PyObjectStruct.by_ref, PyObjectStruct.by_ref, PyObjectStruct.by_ref], PyObjectStruct.by_ref # Error attach_function :PyErr_Clear, [], :void attach_function :PyErr_Print, [], :void attach_function :PyErr_Occurred, [], PyObjectStruct.by_ref attach_function :PyErr_Fetch, [:pointer, :pointer, :pointer], :void attach_function :PyErr_NormalizeException, [:pointer, :pointer, :pointer], :void public_class_method end PYTHON_DESCRIPTION = LibPython.Py_GetVersion().freeze PYTHON_VERSION = PYTHON_DESCRIPTION.split(' ', 2)[0].freeze end