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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\n\
__init__() method. DICT must be a dictionary or None.";
static PyObject *
new_instance(PyObject* unused, PyObject* args)
{
PyObject *klass;
PyObject *dict = NULL;
if (!PyArg_ParseTuple(args, "O!|O:instance",
&PyClass_Type, &klass, &dict))
return NULL;
if (dict == Py_None)
dict = NULL;
else if (dict == NULL)
/* do nothing */;
else if (!PyDict_Check(dict)) {
PyErr_SetString(PyExc_TypeError,
"new.instance() second arg must be dictionary or None");
return NULL;
}
return PyInstance_NewRaw(klass, dict);
}
static char new_im_doc[] =
"Create a instance method object from (FUNCTION, INSTANCE, CLASS).";
static PyObject *
new_instancemethod(PyObject* unused, PyObject* args)
{
PyObject* func;
PyObject* self;
PyObject* classObj;
if (!PyArg_ParseTuple(args, "OOO!:instancemethod",
&func,
&self,
&PyClass_Type, &classObj))
return NULL;
if (!PyCallable_Check(func)) {
PyErr_SetString(PyExc_TypeError,
"first argument must be callable");
return NULL;
}
if (self == Py_None)
self = NULL;
else if (!PyInstance_Check(self)) {
PyErr_SetString(PyExc_TypeError,
"second argument must be instance or None");
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(PyObject* unused, PyObject* args)
{
PyObject* code;
PyObject* globals;
PyObject* name = Py_None;
PyObject* defaults = Py_None;
PyFunctionObject* newfunc;
if (!PyArg_ParseTuple(args, "O!O!|OO!:function",
&PyCode_Type, &code,
&PyDict_Type, &globals,
&name,
&PyTuple_Type, &defaults))
return NULL;
if (name != Py_None && !PyString_Check(name)) {
PyErr_SetString(PyExc_TypeError,
"arg 3 (name) must be None or string");
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,\n"
"CONSTANTS, NAMES, VARNAMES, FILENAME, NAME, FIRSTLINENO, LNOTAB, FREEVARS,\n"
"CELLVARS).";
static PyObject *
new_code(PyObject* unused, PyObject* args)
{
int argcount;
int nlocals;
int stacksize;
int flags;
PyObject* code;
PyObject* consts;
PyObject* names;
PyObject* varnames;
PyObject* freevars = NULL;
PyObject* cellvars = NULL;
PyObject* filename;
PyObject* name;
int firstlineno;
PyObject* lnotab;
PyBufferProcs *pb;
if (!PyArg_ParseTuple(args, "iiiiSO!O!O!SSiS|O!O!:code",
&argcount, &nlocals, &stacksize, &flags,
&code,
&PyTuple_Type, &consts,
&PyTuple_Type, &names,
&PyTuple_Type, &varnames,
&filename, &name,
&firstlineno, &lnotab,
&PyTuple_Type, &freevars,
&PyTuple_Type, &cellvars))
return NULL;
if (freevars == NULL || cellvars == NULL) {
PyObject *empty = PyTuple_New(0);
if (empty == NULL)
return NULL;
if (freevars == NULL) {
freevars = empty;
Py_INCREF(freevars);
}
if (cellvars == NULL) {
cellvars = empty;
Py_INCREF(cellvars);
}
Py_DECREF(empty);
}
pb = code->ob_type->tp_as_buffer;
if (pb == NULL ||
pb->bf_getreadbuffer == NULL ||
pb->bf_getsegcount == NULL ||
(*pb->bf_getsegcount)(code, NULL) != 1)
{
PyErr_SetString(PyExc_TypeError,
"bytecode object must be a single-segment read-only buffer");
return NULL;
}
return (PyObject *)PyCode_New(argcount, nlocals, stacksize, flags,
code, consts, names, varnames,
freevars, cellvars, filename, name,
firstlineno, lnotab);
}
static char new_module_doc[] =
"Create a module object from (NAME).";
static PyObject *
new_module(PyObject* unused, PyObject* args)
{
char *name;
if (!PyArg_ParseTuple(args, "s:module", &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(PyObject* unused, PyObject* args)
{
PyObject * name;
PyObject * classes;
PyObject * dict;
if (!PyArg_ParseTuple(args, "SO!O!:class", &name, &PyTuple_Type, &classes,
&PyDict_Type, &dict))
return NULL;
return PyClass_New(classes, dict, name);
}
static PyMethodDef new_methods[] = {
{"instance", new_instance,
METH_VARARGS, new_instance_doc},
{"instancemethod", new_instancemethod,
METH_VARARGS, new_im_doc},
{"function", new_function,
METH_VARARGS, new_function_doc},
{"code", new_code,
METH_VARARGS, new_code_doc},
{"module", new_module,
METH_VARARGS, new_module_doc},
{"classobj", new_class,
METH_VARARGS, new_class_doc},
{NULL, NULL} /* sentinel */
};
static 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!";
DL_EXPORT(void)
initnew(void)
{
Py_InitModule4("new", new_methods, new_doc, (PyObject *)NULL,
PYTHON_API_VERSION);
}
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