cpython/Modules/newmodule.c

/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.

                        All Rights Reserved

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/* Module new -- create new objects of various types */

#include "Python.h"
#include "compile.h"

static char new_instance_doc[] =
"Create an instance object from (CLASS, DICT) without calling its __init__().";

static PyObject *
new_instance(unused, args)
	PyObject* unused;
	PyObject* args;
{
	PyObject* klass;
	PyObject *dict;
	PyInstanceObject *inst;
	if (!PyArg_ParseTuple(args, "O!O!",
			      &PyClass_Type, &klass,
			      &PyDict_Type, &dict))
		return NULL;
	inst = PyObject_NEW(PyInstanceObject, &PyInstance_Type);
	if (inst == NULL)
		return NULL;
	Py_INCREF(klass);
	Py_INCREF(dict);
	inst->in_class = (PyClassObject *)klass;
	inst->in_dict = dict;
	return (PyObject *)inst;
}

static char new_im_doc[] =
"Create a instance method object from (FUNCTION, INSTANCE, CLASS).";

static PyObject *
new_instancemethod(unused, args)
	PyObject* unused;
	PyObject* args;
{
	PyObject* func;
	PyObject* self;
	PyObject* classObj;

	if (!PyArg_ParseTuple(args, "O!O!O!",
			      &PyFunction_Type, &func,
			      &PyInstance_Type, &self,
			      &PyClass_Type, &classObj))
		return NULL;
	return PyMethod_New(func, self, classObj);
}

static char new_function_doc[] =
"Create a function object from (CODE, GLOBALS, [NAME, ARGDEFS]).";

static PyObject *
new_function(unused, args)
	PyObject* unused;
	PyObject* args;
{
	PyObject* code;
	PyObject* globals;
	PyObject* name = Py_None;
	PyObject* defaults = Py_None;
	PyFunctionObject* newfunc;

	if (!PyArg_ParseTuple(args, "O!O!|SO!",
			      &PyCode_Type, &code,
			      &PyDict_Type, &globals,
			      &name,
			      &PyTuple_Type, &defaults))
		return NULL;

	newfunc = (PyFunctionObject *)PyFunction_New(code, globals);
	if (newfunc == NULL)
		return NULL;

	if (name != Py_None) {
		Py_XINCREF(name);
		Py_XDECREF(newfunc->func_name);
		newfunc->func_name = name;
	}
	if (defaults != Py_None) {
		Py_XINCREF(defaults);
		Py_XDECREF(newfunc->func_defaults);
		newfunc->func_defaults  = defaults;
	}

	return (PyObject *)newfunc;
}

static char new_code_doc[] =
"Create a code object from (ARGCOUNT, NLOCALS, STACKSIZE, FLAGS, CODESTRING, CONSTANTS, NAMES, VARNAMES, FILENAME, NAME, FIRSTLINENO, LNOTAB).";

static PyObject *
new_code(unused, args)
	PyObject* unused;
	PyObject* args;
{
	int argcount;
	int nlocals;
	int stacksize;
	int flags;
	PyObject* code;
	PyObject* consts;
	PyObject* names;
	PyObject* varnames;
	PyObject* filename;
	PyObject* name;
	int firstlineno;
	PyObject* lnotab;
  
	if (!PyArg_ParseTuple(args, "iiiiSO!O!O!SSiS",
			      &argcount, &nlocals, &stacksize, &flags,
			      &code,
			      &PyTuple_Type, &consts,
			      &PyTuple_Type, &names,
			      &PyTuple_Type, &varnames,
			      &filename, &name,
			      &firstlineno, &lnotab))
		return NULL;
	return (PyObject *)PyCode_New(argcount, nlocals, stacksize, flags,
				      code, consts, names, varnames,
				      filename, name, firstlineno, lnotab);
}

static char new_module_doc[] =
"Create a module object from (NAME).";

static PyObject *
new_module(unused, args)
	PyObject* unused;
	PyObject* args;
{
	char *name;
  
	if (!PyArg_ParseTuple(args, "s", &name))
		return NULL;
	return PyModule_New(name);
}

static char new_class_doc[] =
"Create a class object from (NAME, BASE_CLASSES, DICT).";

static PyObject *
new_class(unused, args)
	PyObject* unused;
	PyObject* args;
{
	PyObject * name;
	PyObject * classes;
	PyObject * dict;
  
	if (!PyArg_ParseTuple(args, "SO!O!", &name, &PyTuple_Type, &classes,
			      &PyDict_Type, &dict))
		return NULL;
	return PyClass_New(classes, dict, name);
}

static PyMethodDef new_methods[] = {
	{"instance",		new_instance,		1, new_instance_doc},
	{"instancemethod",	new_instancemethod,	1, new_im_doc},
	{"function",		new_function,		1, new_function_doc},
	{"code",		new_code,		1, new_code_doc},
	{"module",		new_module,		1, new_module_doc},
	{"classobj",		new_class,		1, new_class_doc},
	{NULL,			NULL}		/* sentinel */
};

char new_doc[] =
"Functions to create new objects used by the interpreter.\n\
\n\
You need to know a great deal about the interpreter to use this!";

void
initnew()
{
	Py_InitModule4("new", new_methods, new_doc, (PyObject *)NULL,
		       PYTHON_API_VERSION);
}