From 33b74fc7e4ab5b3567f020c05e4d1d4f7be70f9f Mon Sep 17 00:00:00 2001
From: King_DuckZ <king_duckz@gmx.com>
Date: Wed, 10 Feb 2021 23:15:16 +0100
Subject: [PATCH] Adding the module but it's not working yet

---
 meson.build            | 20 +++++++++++
 meson_options.txt      |  1 +
 src/pywrenppmodule.cpp | 81 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 102 insertions(+)
 create mode 100644 src/pywrenppmodule.cpp

diff --git a/meson.build b/meson.build
index 59282fd..ee501ab 100644
--- a/meson.build
+++ b/meson.build
@@ -4,6 +4,8 @@ project('wrenpp', 'cpp',
   default_options: ['buildtype=release', 'cpp_std=c++17', 'b_ndebug=if-release'],
 )
 
+pymod = import('python')
+
 wren_dep = dependency('wren', version: '>=0.2.0',
   fallback: ['wren', 'wren_dep'],
   default_options: [
@@ -14,6 +16,10 @@ wren_dep = dependency('wren', version: '>=0.2.0',
   ],
   static: true,
 )
+python = pymod.find_installation('python3',
+  required: get_option('wrenpp_with_python'),
+  disabler: true
+)
 public_incl = include_directories('include')
 
 os = host_machine.system()
@@ -65,6 +71,20 @@ wrenpp_dep = declare_dependency(
   include_directories: public_incl,
 )
 
+python.extension_module('py' + meson.project_name(),
+  sources: [
+	'src/pywrenppmodule.cpp',
+  ],
+  dependencies: [
+	python.dependency(
+	  version: '>=3.6.0',
+	  required: get_option('wrenpp_with_python'),
+	),
+	wrenpp_dep,
+  ],
+  install: true,
+)
+
 if get_option('build_examples')
   subdir('examples')
 endif
diff --git a/meson_options.txt b/meson_options.txt
index 23a3a31..88c13fc 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -2,3 +2,4 @@ option('build_testing', type: 'boolean', value: false)
 option('build_examples', type: 'boolean', value: false)
 option('wren_with_rand', type: 'boolean', value: false, yield: true)
 option('wren_with_meta', type: 'boolean', value: false, yield: true)
+option('wrenpp_with_python', type: 'feature', value: 'disabled')
diff --git a/src/pywrenppmodule.cpp b/src/pywrenppmodule.cpp
new file mode 100644
index 0000000..269dd4d
--- /dev/null
+++ b/src/pywrenppmodule.cpp
@@ -0,0 +1,81 @@
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+#include "wrenpp/vm.hpp"
+#include "wrenpp/def_configuration.hpp"
+#include "config.h"
+
+#define CURR_MODULE_NAME WRENPP_NAME
+
+namespace {
+struct VMObject;
+int vm_init (VMObject* self, PyObject*, PyObject*);
+
+class VMConfig : public wren::DefConfiguration {
+public:
+	wren::foreign_method_t foreign_method_fn (
+		wren::VM* vm,
+		const char* module_ptr,
+		const char* class_name_ptr,
+		bool is_static,
+		const char* signature_ptr
+	) {
+		return nullptr;
+	}
+};
+
+PyMethodDef WrenppMethods[] = {
+	//{"eval_script", &eval_script, METH_VARARGS, "Evaluate a Wren script"},
+	{nullptr, nullptr, 0, nullptr}
+};
+
+struct PyModuleDef WrenppModule = {
+	PyModuleDef_HEAD_INIT,
+	CURR_MODULE_NAME, //module name
+	"Python bindings for Wrenpp", //module documentation
+	-1, //size of per-interpreter state of the module, or -1 if the module keeps state in global variables
+	WrenppMethods
+};
+
+struct VMObject {
+	PyObject_HEAD
+	wren::VM vm;
+};
+
+PyTypeObject VMType = {
+	PyVarObject_HEAD_INIT(NULL, 0)
+	.tp_name = CURR_MODULE_NAME ".VM",
+	.tp_basicsize = sizeof(VMObject),
+	.tp_itemsize = 0,
+	.tp_flags = Py_TPFLAGS_DEFAULT,
+	.tp_doc = "Wrenpp VM",
+	.tp_init = reinterpret_cast<initproc>(vm_init),
+	.tp_new = PyType_GenericNew,
+};
+
+int vm_init (VMObject* self, PyObject* /*args*/, PyObject* /*kwds*/) {
+	try {
+		VMConfig config;
+		new(&self->vm) wren::VM(&config, nullptr);
+	}
+	catch (...) {
+		return -1;
+	}
+	return 0;
+}
+} //unnamed namespace
+
+PyMODINIT_FUNC PyInit_wrenpp(void) {
+	if (PyType_Ready(&VMType) < 0)
+		return nullptr;
+	PyObject* const m = PyModule_Create(&WrenppModule);
+	if (not m)
+		return nullptr;
+
+	Py_INCREF(&VMType);
+	if (PyModule_AddObject(m, "VM", reinterpret_cast<PyObject*>(&VMType)) < 0) {
+		Py_DECREF(&VMType);
+		Py_DECREF(m);
+		return nullptr;
+	}
+	return m;
+}