/usr/share/ada/adainclude/gnatcoll_python/python_support.c is in libgnatcoll-python16.1.0-dev 17.0.2017-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- G N A T C O L L --
-- --
-- Copyright (C) 2003-2017, AdaCore --
-- --
-- This is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. This software is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public --
-- License for more details. You should have received a copy of the GNU --
-- General Public License distributed with this software; see file --
-- COPYING3. If not, go to http://www.gnu.org/licenses for a complete copy --
-- of the license. --
----------------------------------------------------------------------------*/
/* Force a value for the macro. It will only work for gcc, but otherwise
* we cannot use the mingwin python with gcc on Windows*/
#define PY_LONG_LONG long long
#include <Python.h>
#include <compile.h> /* PyCodeObject definition in older versions*/
#include <string.h>
/* On Windows and if we have HAVE_DECLSPEC_DLL defined remove the
__declspec(dllexport) attribute from PyMODINIT_FUNC. Having such attribute
to flag symbols to export from a DLL means that *only* those symbols
are exported. */
#if _WIN32
#ifdef HAVE_DECLSPEC_DLL
#undef PyMODINIT_FUNC
#define PyMODINIT_FUNC void
#endif
#endif
#undef DEBUG
/* #define DEBUG */
#if PY_MAJOR_VERSION >= 3
#ifndef PyDescr_TYPE
#define PyDescr_TYPE(x) (((PyDescrObject *)(x))->d_type)
#define PyDescr_NAME(x) (((PyDescrObject *)(x))->d_name)
#endif
#endif
/*****************************************************************************
* Modules
*****************************************************************************/
#if PY_MAJOR_VERSION >= 3
PyMODINIT_FUNC
#else
PyObject *
#endif
ada_Py_InitModule4
(char *name, PyMethodDef *methods,
char *doc, PyObject *self)
{
#if PY_MAJOR_VERSION >= 3
struct PyModuleDef def = {
PyModuleDef_HEAD_INIT,
name, /* m_name */
doc, /* m_doc */
-1, /* m_size */
methods, /* m_methods */
NULL, /* m_reload */
NULL, /* m_traverse */
NULL, /* m_clear */
NULL}; /* m_free */
struct PyModuleDef* module = (struct PyModuleDef*)
malloc(sizeof(struct PyModuleDef));
PyObject* mod;
PyObject* imported;
memcpy(module, &def, sizeof(struct PyModuleDef));
mod = PyModule_Create(module);
return imported;
#else
return Py_InitModule4 (name, methods, doc, self, PYTHON_API_VERSION);
#endif
}
#if PY_MAJOR_VERSION >= 3
// The definition of the module the user is creating via GNATCOLL.
// There is a single such module, so it is simpler to declare the
// variable as static rather than use calls to malloc().
static PyMethodDef user_methods[] = {
{NULL, NULL} /* Sentinel */
};
static struct PyModuleDef user_module = {
PyModuleDef_HEAD_INIT,
NULL, /* m_name */
NULL, /* m_doc */
-1, /* m_size */
user_methods, /* m_methods */
NULL, /* m_reload */
NULL, /* m_traverse */
NULL, /* m_clear */
NULL /* m_free */
};
#endif
static char* user_module_name;
PyMODINIT_FUNC
init_user_module(void) {
//struct PyModuleDef* module = (struct PyModuleDef*)malloc(sizeof(def));
//memcpy(module, &def, sizeof(struct PyModuleDef));
#if PY_MAJOR_VERSION >= 3
return PyModule_Create(&user_module);
#else
Py_InitModule4 (user_module_name, NULL, "", NULL, PYTHON_API_VERSION);
#endif
};
// To hide the output, we also need to rewrite displayhook.
// Otherwise, calling a python function from Ada will print its
// output to stdout (even though we have redirected sys.stdout ?)
// So we make sure that nothing is ever printed. We cannot do this
// systematically though, since in interactive mode (consoles...)
// we still want the usual python behavior.
PyObject*
ada_py_initialize_and_module(char* program_name, char* name) {
PyObject* module;
PyObject* imported;
user_module_name = strdup(name);
#if PY_MAJOR_VERSION >= 3
user_module.m_name = user_module_name;
Py_SetProgramName ((wchar_t*)program_name);
#else
Py_SetProgramName (program_name);
#endif
PyImport_AppendInittab(user_module_name, init_user_module);
Py_InitializeEx(0);
// Initialize the prompt if needed
PyObject* prompt = PySys_GetObject ("ps1");
if (prompt == NULL) {
prompt = PyUnicode_FromString (">>> ");
PySys_SetObject ("ps1", prompt);
Py_DECREF (prompt);
}
prompt = PySys_GetObject ("ps2");
if (prompt == NULL) {
prompt = PyUnicode_FromString ("... ");
PySys_SetObject ("ps2", prompt);
Py_DECREF (prompt);
}
// Make the user's module visible to scripts. We cannot use
// PyImport_ImportModule, which imports the module but doesn't add
// it to the global dictionary and as such it is not visible to
// user scripts.
imported = PyImport_ImportModule(name);
if (imported == NULL) {
printf ("Could not import module %s", name);
return NULL;
}
// Import 'sys', which is needed for instance in Set_Default_Console
// to get access to the default value
PyRun_SimpleString("import sys\n");
char* command = (char*)malloc(9 + strlen(name));
strcpy (command, "import ");
strcat (command, name);
strcat (command, "\n");
PyRun_SimpleString(command);
free (command);
return imported;
};
/************************************************************************
* Methods
* To implement methods, we have the following requirements:
* - we need to support the notion of bound methods in python (where self
* is set automatically by python to the instance that calls the method).
* - we need to pass data back to Ada, that was set when the method was
* declared. This data describes how the method is implemented in Ada.
* The implementation is based on Python descriptors. However, none of the
* predefined descriptors provides support for passing data back to Ada.
* So we define our own descriptor, heavily based on the predefined one.
*
* From python, when you do a.foo(), the following occurs behind the scene:
* - retrieves "A.foo", as a PyAdaMethodDescrObject
* - since this is a descriptor, calls .__get__() to get the function
* to execute. In practice, this calls adamethod_descr_get which
* creates a bound method through PyMethod_New (bound to 'a')
* - call that object. The implementation of classobject.c::method_call
* adds self, ie 'a', as the first argument in the tuple of arguments,
* then executes the wrapped function. Here, the wrapped function is
* a PyCFunction that was created when the method was registered
* initially, and that always calls back Ada but always passes the
* same 'self' argument (the data Ada itself provided).
************************************************************************/
#if PY_MAJOR_VERSION >= 3
typedef struct {
PyDescr_COMMON;
PyObject* cfunc; // An instance of PyCFunction, bound with the
// data that Ada needs, in the form of a PyCapsule.
} PyAdaMethodDescrObject;
PyTypeObject PyAdaMethodDescr_Type;
int adamethod_descr_initialized = 0;
// Implementation of the __get__ descriptor method. The code is heavily
// copied from descrobject.c::method_get.
static PyObject * adamethod_descr_get
(PyAdaMethodDescrObject *descr, PyObject *obj, PyObject *type)
{
PyObject *res;
if (obj == NULL) {
Py_INCREF(descr);
return (PyObject*) descr;
}
if (!PyObject_TypeCheck(obj, PyDescr_TYPE(descr))) {
PyErr_Format(PyExc_TypeError,
"descriptor '%V' for '%s' objects "
"doesn't apply to '%s' object",
PyDescr_NAME(descr), "?",
PyDescr_TYPE(descr)->tp_name,
obj->ob_type->tp_name);
return NULL;
}
return PyMethod_New (descr->cfunc, obj);
}
// Creates a new AdaMethod instance. 'method' is the description of the Ada
// function to call, and 'data' is a PyCapsule that is passed to Ada as 'self'.
PyObject *
PyDescr_NewAdaMethod(PyTypeObject *type, PyObject* cfunc, const char* name)
{
if (!adamethod_descr_initialized) {
adamethod_descr_initialized = 1;
memcpy (&PyAdaMethodDescr_Type, &PyMethodDescr_Type, sizeof (PyTypeObject));
PyAdaMethodDescr_Type.tp_basicsize = sizeof(PyAdaMethodDescrObject);
PyAdaMethodDescr_Type.tp_descr_get = (descrgetfunc)adamethod_descr_get;
}
PyAdaMethodDescrObject *descr = (PyAdaMethodDescrObject*) PyType_GenericAlloc
(&PyAdaMethodDescr_Type, 0);
if (descr != NULL) {
Py_XINCREF(type);
PyDescr_TYPE(descr) = type;
PyDescr_NAME(descr) = PyUnicode_InternFromString(name);
if (PyDescr_NAME(descr) == NULL) {
Py_DECREF(descr);
descr = NULL;
}
}
if (descr != NULL) {
descr->cfunc = cfunc;
}
return (PyObject *)descr;
}
#endif /* python 3.x */
// Adds a new method to the class 'class'.
// 'module' is the module to which the class belongs, and is used to set
// the __module__ attribute of the new method.
// 'def' described the C function that will be called when the function is
// executed in python.
// 'data' is data to pass from C->Python->C (generally wrapped in a PyCapsule).
// It will be pass as the "Self" argument to First_Level.
void ada_py_add_method
(PyMethodDef* def, PyObject* data, PyObject* class, PyObject* module)
{
PyObject* cfunc = PyCFunction_NewEx
(def, data, PyUnicode_FromString (PyModule_GetName (module)));
#if PY_MAJOR_VERSION >= 3
PyObject* method = PyDescr_NewAdaMethod
((PyTypeObject*)class, cfunc, def->ml_name);
#else
PyObject* method = PyMethod_New (cfunc, NULL, class);
#endif
PyObject_SetAttrString (class, def->ml_name, method);
Py_DECREF (method);
};
/*****************************************************************************/
int
ada_pyget_refcount (PyObject* obj)
{
return obj->ob_refcnt;
}
char*
ada_py_refcount_msg (PyObject* obj)
{
static char msg[200];
if (obj) {
snprintf (msg, 199, "%p (%s, rc=%ld)",
obj, obj->ob_type->tp_name, obj->ob_refcnt);
} else {
msg[0] = '\0';
}
return msg;
}
void
ada_py_print_refcount (PyObject* obj, char* msg)
{
if (obj)
printf ("DEBUG %s %s\n", msg, ada_py_refcount_msg (obj));
}
void
ada_py_incref (PyObject* obj)
{
Py_INCREF (obj);
#ifdef DEBUG
ada_py_print_refcount (obj, "after incref");
#endif
}
void
ada_py_decref (PyObject* obj)
{
#ifdef DEBUG
ada_py_print_refcount (obj, "before decref");
#endif
Py_DECREF (obj);
}
void
ada_py_xincref (PyObject* obj)
{
Py_XINCREF (obj);
#ifdef DEBUG
ada_py_print_refcount (obj, "after xincref");
#endif
}
void
ada_py_xdecref (PyObject* obj)
{
#ifdef DEBUG
ada_py_print_refcount (obj, "before xdecref");
#endif
Py_XDECREF (obj);
}
int
ada_pybasestring_check (PyObject* obj)
{
#if PY_MAJOR_VERSION >= 3
return PyUnicode_Check (obj);
#else
return PyString_Check (obj) || PyUnicode_Check (obj);
#endif
}
int
ada_pystring_check (PyObject* obj)
{
#if PY_MAJOR_VERSION >= 3
return PyUnicode_Check (obj);
#else
return PyString_Check (obj);
#endif
}
PyObject* ada_PyUnicode_AsEncodedString
(PyObject *unicode, const char *encoding, const char *errors)
{
#ifdef Py_UNICODE_WIDE
return PyUnicodeUCS4_AsEncodedString (unicode, encoding, errors);
#else
return PyUnicodeUCS2_AsEncodedString (unicode, encoding, errors);
#endif
}
PyObject* ada_PyUnicode_FromString (const char *u)
{
#if PY_VERSION_HEX >= 0x02060000
#ifdef Py_UNICODE_WIDE
return PyUnicodeUCS4_FromString (u);
#else
return PyUnicodeUCS2_FromString (u);
#endif
#else
/* Not available in this version */
return 0;
#endif
}
int
ada_pyunicode_check (PyObject* obj)
{
return PyUnicode_Check (obj);
}
int
ada_pyint_check (PyObject* obj)
{
#if PY_MAJOR_VERSION >= 3
return PyLong_Check (obj);
#else
return PyInt_Check (obj);
#endif
}
int
ada_pyfloat_check (PyObject* obj)
{
return PyFloat_Check (obj);
}
int
ada_pybool_check (PyObject* obj)
{
#ifdef PyBool_Check
return PyBool_Check (obj);
#else
return 0;
#endif
}
int
ada_pybool_is_true (PyObject* obj)
{
return PyObject_IsTrue (obj);
}
int
ada_pydict_check (PyObject* obj)
{
return PyDict_Check (obj);
}
int
ada_pyanyset_check (PyObject* obj)
{
return PyAnySet_Check (obj);
}
int
ada_pyfunction_check (PyObject* obj)
{
return PyFunction_Check (obj);
}
PyObject*
ada_pyfunction_get_globals (PyObject* obj)
{
return PyFunction_GET_GLOBALS (obj);
}
PyObject*
ada_pyfunction_get_code (PyObject* obj)
{
return PyFunction_GET_CODE (obj);
}
PyObject*
ada_pyfunction_get_closure (PyObject* obj)
{
return PyFunction_GET_CLOSURE (obj);
}
PyObject*
ada_pyfunction_get_defaults (PyObject* obj)
{
return PyFunction_GET_DEFAULTS (obj);
}
PyObject* ada_PyEval_EvalCodeEx
(PyCodeObject *co,
PyObject *globals,
PyObject *locals,
PyObject *args,
PyObject *kwds,
PyObject *defs,
PyObject *closure)
{
/* Code copied from funcobject.c::function_call() */
PyObject **k, **d;
PyObject* result;
PyObject* kwtuple;
int nk, nd;
if (defs != NULL && PyTuple_Check(defs)) {
d = &PyTuple_GET_ITEM((PyTupleObject *)defs, 0);
nd = PyTuple_Size(defs);
} else {
d = NULL;
nd = 0;
}
if (kwds != NULL && PyDict_Check(kwds)) {
int i = 0;
#if PY_MAJOR_VERSION > 2 || (PY_MAJOR_VERSION==2 && PY_MINOR_VERSION>=5)
Py_ssize_t pos = 0;
#else
int pos = 0;
#endif
nk = PyDict_Size(kwds);
kwtuple = PyTuple_New(2*nk);
if (kwtuple == NULL)
return NULL;
k = &PyTuple_GET_ITEM(kwtuple, 0);
pos = i = 0;
while (PyDict_Next(kwds, &pos, &k[i], &k[i+1])) {
Py_INCREF(k[i]);
Py_INCREF(k[i+1]);
i += 2;
}
nk = i/2;
} else {
k = NULL;
nk = 0;
}
#if PY_MAJOR_VERSION >= 3
result = (PyObject*) PyEval_EvalCodeEx
((PyObject*) co,
globals, locals,
&PyTuple_GET_ITEM (args, 0) /* args */, PyTuple_Size (args) /* argc*/,
k /* kwds */, nk /* kwdc */,
d /* defs */, nd /* defcount */,
NULL, /* kwdefs */
closure /* closure */);
#else
result = (PyObject*) PyEval_EvalCodeEx
(co, globals, locals,
&PyTuple_GET_ITEM (args, 0) /* args */, PyTuple_Size (args) /* argc*/,
k /* kwds */, nk /* kwdc */,
d /* defs */, nd /* defcount */,
closure /* closure */);
#endif
Py_XDECREF (kwtuple);
return result;
}
int
ada_pycobject_check (PyObject* obj)
{
#if PY_MAJOR_VERSION >= 3
return PyCapsule_CheckExact (obj);
#else
return PyCObject_Check (obj);
#endif
}
int
ada_pytuple_check (PyObject* obj)
{
return PyTuple_Check (obj);
}
int
ada_pylist_check (PyObject* obj)
{
return PyList_Check (obj);
}
int
ada_pyiter_check (PyObject* obj)
{
return PyIter_Check (obj);
}
int
ada_pymethod_check (PyObject* obj)
{
return PyMethod_Check (obj);
}
PyTypeObject*
ada_gettypeobject (PyObject* obj)
{
return (PyTypeObject*)(obj->ob_type);
}
char*
ada_tp_name (PyTypeObject* obj)
{
return (char *)obj->tp_name;
}
PyObject* ada_py_none ()
{
return Py_None;
}
PyObject* ada_py_false()
{
return Py_False;
}
PyObject*
ada_py_true()
{
return Py_True;
}
PyObject *
ada_py_object_callmethod (PyObject *o, char *m)
{
return PyObject_CallMethod (o, m, "");
}
PyObject *
ada_py_object_callmethod_obj (PyObject *o, char *m, PyObject *arg)
{
return PyObject_CallMethod (o, m, "(O)", arg);
}
PyObject *
ada_py_object_callmethod_int (PyObject *o, char *m, int arg)
{
return PyObject_CallMethod (o, m, "(i)", arg);
}
int
ada_py_arg_parsetuple_ptr (PyObject *o, char *fmt, void *arg1)
{
return PyArg_ParseTuple (o, fmt, arg1);
}
int
ada_py_arg_parsetuple_ptr2 (PyObject *o, char *fmt, void *arg1, void *arg2)
{
return PyArg_ParseTuple (o, fmt, arg1, arg2);
}
int
ada_py_arg_parsetuple_ptr3
(PyObject *o, char *fmt, void *arg1, void * arg2, void *arg3)
{
return PyArg_ParseTuple (o, fmt, arg1, arg2, arg3);
}
int
ada_py_arg_parsetuple_ptr4
(PyObject *o, char *fmt, void *arg1, void * arg2, void *arg3, void *arg4)
{
return PyArg_ParseTuple (o, fmt, arg1, arg2, arg3, arg4);
}
int
ada_py_arg_parsetuple_ptr5
(PyObject *o, char *fmt,
void *arg1, void * arg2, void *arg3, void *arg4, void *arg5)
{
return PyArg_ParseTuple (o, fmt, arg1, arg2, arg3, arg4, arg5);
}
extern int gnat_argc;
extern char **gnat_argv;
int
ada_py_main ()
{
#if PY_MAJOR_VERSION >= 3
return Py_Main (gnat_argc, (wchar_t**) gnat_argv);
#else
return Py_Main (gnat_argc, (char**) gnat_argv);
#endif
}
PyObject*
ada_type_new (PyTypeObject* meta, char* name, PyObject* bases, PyObject* dict)
{
PyTypeObject* m = meta;
PyObject *args, *kwargs, *b=NULL;
PyObject* result;
PyObject* str;
if (dict == NULL) {
printf ("ada_type_new requires a non-null dict\n");
return NULL;
}
if (meta == NULL) {
m = &PyType_Type;
}
/* Construct the parameter list. Do not use keyword arguments, since the
__init__ of the builtin types do not accept them, and tp_new will try to
call __init__, resulting in an error
*/
args = PyTuple_New (3);
kwargs = PyDict_New ();
#if PY_MAJOR_VERSION >= 3
str = PyUnicode_FromString (name);
#else
str = PyString_FromString (name);
#endif
PyTuple_SET_ITEM (args, 0, str); /* steal reference to str */
if (bases == NULL) {
b = PyTuple_New (0);
PyTuple_SET_ITEM (args, 1, b); /* steal ref to b */
} else {
PyTuple_SetItem (args, 1, bases); /* increase refcount for bases */
}
PyTuple_SetItem (args, 2, dict); /* increase refcount for dict */
result = PyType_Type.tp_new (m, args, kwargs);
Py_XDECREF (args);
Py_XDECREF (kwargs);
return result;
}
int
ada_pydescr_newGetSet (PyTypeObject* type,
char* name,
setter set,
getter get,
char* doc,
void* closure)
{
struct PyGetSetDef *descr =
(struct PyGetSetDef*)malloc (sizeof (struct PyGetSetDef));
PyObject* prop;
descr->name = name;
descr->get = get;
descr->set = set;
descr->doc = doc;
descr->closure = closure;
prop = PyDescr_NewGetSet (type, descr);
if (prop == NULL) {
return 0;
} else {
PyDict_SetItemString(type->tp_dict, name, prop);
Py_DECREF (prop);
return 1;
}
}
#ifdef WITH_THREAD
const int python_with_thread = 1;
#else
const int python_with_thread = 0;
#endif
PyThreadState* ada_PyEval_SaveThread() {
#ifdef WITH_THREAD
return PyEval_SaveThread();
#else
return NULL;
#endif
}
void ada_PyEval_RestoreThread (PyThreadState* state) {
#ifdef WITH_THREAD
PyEval_RestoreThread (state);
#endif
}
PyThreadState* ada_PyGILState_GetThisThreadState() {
#ifdef WITH_THREAD
return PyGILState_GetThisThreadState();
#else
return NULL;
#endif
}
int ada_PyGILState_Ensure() {
#ifdef WITH_THREAD
return PyGILState_Ensure();
#else
return 0;
#endif
}
void ada_PyEval_InitThreads() {
#ifdef WITH_THREAD
PyEval_InitThreads();
#endif
}
int
ada_is_subclass (PyObject* class, PyObject* base)
{
if (!class || !base) {
return -1;
} else {
return PyObject_IsSubclass (class, base);
}
}
const char* ada_py_builtin() {
#if PY_MAJOR_VERSION >= 3
return "builtins";
#else
return "__builtin__";
#endif
}
const char* ada_py_builtins() {
#if PY_MAJOR_VERSION >= 3
return "__builtins__";
#else
return "__builtins__";
#endif
}
/* Result value must be freed */
PyAPI_FUNC(const char *) ada_PyString_AsString(PyObject * val) {
#if PY_MAJOR_VERSION >= 3
PyObject* utf8 = PyUnicode_AsUTF8String(val);
char* tmp = PyBytes_AsString (utf8);
char* str = strdup (tmp);
Py_XDECREF(utf8);
return str;
#else
char * str = PyString_AsString(val);
return strdup(str);
#endif
};
#if PY_MAJOR_VERSION >= 3
int ada_is_python3() {
return 1;
}
PyAPI_FUNC(PyObject *) PyInt_FromLong(long val) {
return PyLong_FromLong(val);
};
PyAPI_FUNC(long) PyInt_AsLong(PyObject * val) {
return PyLong_AsLong(val);
};
PyAPI_FUNC(PyObject *) PyString_FromStringAndSize(
const char *val, Py_ssize_t s)
{
return PyUnicode_FromStringAndSize(val, s);
};
PyAPI_FUNC(void *) PyCObject_AsVoidPtr(PyObject * val) {
void* data = PyCapsule_GetPointer(val, "GNATCOLL._C_API");
return data;
};
PyAPI_FUNC(PyObject *) PyCObject_FromVoidPtr(
void *cobj, void (*destruct)(void*))
{
return PyCapsule_New(
cobj /* pointer */,
"GNATCOLL._C_API" /* name */,
(PyCapsule_Destructor) destruct);
};
#else
int ada_is_python3() {
return 0;
}
#endif
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