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/* copyright 2003 Jim Bublitz <jbublitz@nwinternet.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <stdarg.h>
#include <string.h>
// this just gets rid of a warning when Python.h redefines it
#undef _POSIX_C_SOURCE
#include <pythonize.h>
#define debug 1
ObjectRef::ObjectRef (ObjectRef *oi, PyObject *o)
{
prevObject = oi;
object = o;
}
Pythonize::Pythonize ()
{
pythonInit = 1;
objects = NULL;
if (debug) printf ("\n\nPythonize constructor -- pid = %i\n", getpid ());
if (!Py_IsInitialized ())
{
PyEval_InitThreads ();
Py_Initialize ();
if (!Py_IsInitialized ())
{
pythonInit = 0;
return;
}
if (debug) printf ("Python interpreter initialized!\n\n");
// free the lock
PyEval_ReleaseLock();
}
}
bool Pythonize::runScript (char *scriptPath)
{
FILE *f;
int res;
if (debug) printf ("Running script: %s\n", scriptPath);
if (scriptPath == NULL || strlen (scriptPath) == 0) return false;
f = fopen (scriptPath, "r");
if (f == NULL) return false;
res = PyRun_SimpleFile (f, scriptPath);
fclose (f);
return res == 0;
}
PyObject * Pythonize::runFunction (PyObject *object, PyObject *args)
{
if (!PyCallable_Check (object))
return NULL;
PyObject *res = PyObject_CallObject (object, args ? args : PyTuple_New (0));
Py_XINCREF (res);
return res;
}
void * Pythonize::runFunctionVoid (PyObject *object, PyObject *args)
{
if (!PyCallable_Check (object))
return NULL;
PyObject *pyRes = PyObject_CallObject (object, args ? args : PyTuple_New (0));
void *res = PyLong_AsVoidPtr (pyRes);
return res;
}
bool Pythonize::runString (char *str)
{
if (str == NULL || strlen (str) == 0) return false;
int res = PyRun_SimpleString (str);
return res == 0;
}
bool Pythonize::appendToSysPath (const char* newPath)
{
if (newPath == NULL || strlen (newPath) == 0) return false;
char *fmtString = "import sys\nif not '%s' in sys.path:\n\tsys.path.append ('%s')\n"; //print sys.path\n";
int length = strlen (fmtString) + 2*strlen (newPath) + 1;
char *line = new char [length];
if (!line) return false;
snprintf (line, length, fmtString, newPath, newPath);
int res = PyRun_SimpleString (line);
delete line;
return res == 0;
}
PyObject *Pythonize::importModule (char *moduleName)
{
if (moduleName == NULL || strlen (moduleName) == 0) return NULL;
PyObject *module = PyImport_ImportModule (moduleName);
objects = new ObjectRef (objects, module);
if (!objects) return NULL;
return module;
}
Pythonize::~Pythonize ()
{
if (debug) printf ("Pythonize destructor\n");
ObjectRef *top;
while (objects)
{
top = objects;
objects = objects->prevObject;
delete top;
}
if (debug) printf (" --- Objects destroyed\n");
Py_Finalize();
if (debug) printf (" --- Py_Finalized\n");
}
// The global Pythonize instance
Pythonize *pyize = new Pythonize ();
extern "C"
{
Pythonize *_pythonize;
Pythonize *initialize ()
{
if (_pythonize) return _pythonize;
_pythonize = new Pythonize ();
if (!_pythonize || !_pythonize->getPythonInit ())
{
if (_pythonize) delete _pythonize;
return NULL;
}
return _pythonize;
}
void finalize ()
{
if (_pythonize) {
if (debug) printf(" --- Pythonize finalize()\n");
delete _pythonize;
}
}
// adds a path to sys.path
bool appendToSysPath (const char* newPath)
{
return _pythonize ? _pythonize->appendToSysPath (newPath) : false;
}
// imports a module into the interpreter
// or gets a PyObject for an already loaded module
PyObject *importModule (char *moduleName)
{
return _pythonize ? _pythonize->importModule (moduleName) : NULL;
}
// returns an object from a loaded module
// you must decref the object returned when done with it (new reference returned)
PyObject *getNewObjectRef (PyObject *module, char *object)
{
return _pythonize ? _pythonize->getNewObjectRef (module, object) : NULL;
}
bool getPythonInit ()
{
return _pythonize ? _pythonize->getPythonInit () : false;
}
// decrements the ref count of an object
void decref (PyObject *object)
{
Py_XDECREF (object);
}
// runs a script on the current sys.path
bool runScript (char *scriptPath)
{
return _pythonize ? _pythonize->runScript (scriptPath) : false;
}
// executes a string of Python in the interpreter
bool runString (char *str)
{
return _pythonize ? _pythonize->runString (str) : false;
}
// runs a callable Python object
PyObject *runFunction (PyObject *object, PyObject *args)
{
return _pythonize ? _pythonize->runFunction (object, args) : NULL;
}
}
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