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/*==LICENSE==*
CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
You can contact Cyan Worlds, Inc. by email legal@cyan.com
or by snail mail at:
Cyan Worlds, Inc.
14617 N Newport Hwy
Mead, WA 99021
*==LICENSE==*/
#include "hsTypes.h"
#include "PythonInterface.h"
#include "compile.h"
#include "eval.h"
#include "marshal.h"
#include "cStringIO.h"
static PyObject* stdFile; // python object of the stdout and err file
void PythonInterface::initPython(std::string rootDir)
{
// if haven't been initialized then do it
if ( Py_IsInitialized() == 0 )
{
// initialize the Python stuff
// let Python do some intialization...
Py_SetProgramName("plasma");
Py_Initialize();
// intialize any of our special plasma python modules
// initP2PInterface();
// save object to the Plasma module
// plasmaMod = PyImport_ImportModule("Plasma");
// create the StringIO for the stdout and stderr file
PycStringIO = (struct PycStringIO_CAPI*)PyCObject_Import("cStringIO", "cStringIO_CAPI");
stdFile = (*PycStringIO->NewOutput)(20000);
// if we need the builtins then find the builtin module
PyObject* sysmod = PyImport_ImportModule("sys");
// then add the builtin dicitionary to our module's dictionary
if (sysmod != NULL )
{
// get the sys's dictionary to find the stdout and stderr
PyObject* sys_dict = PyModule_GetDict(sysmod);
if (stdFile != nil)
{
PyDict_SetItemString(sys_dict,"stdout", stdFile);
PyDict_SetItemString(sys_dict,"stderr", stdFile);
}
// NOTE: we will reset the path to not include paths
// ...that Python may have found in the registery
PyObject* path_list = PyList_New(0);
printf("Setting up include dirs:\n");
printf("%s\n",rootDir.c_str());
PyObject* more_path = PyString_FromString(rootDir.c_str());
PyList_Append(path_list, more_path);
// make sure that our plasma libraries are gotten before the system ones
std::string temp = rootDir + "plasma";
printf("%s\n",temp.c_str());
PyObject* more_path3 = PyString_FromString(temp.c_str());
PyList_Append(path_list, more_path3);
temp = rootDir + "system";
printf("%s\n\n",temp.c_str());
PyObject* more_path2 = PyString_FromString("system");
PyList_Append(path_list, more_path2);
// set the path to be this one
PyDict_SetItemString(sys_dict,"path",path_list);
Py_DECREF(sysmod);
}
}
// initialized++;
}
void PythonInterface::addPythonPath(std::string path)
{
PyObject* sysmod = PyImport_ImportModule("sys");
if (sysmod != NULL)
{
PyObject* sys_dict = PyModule_GetDict(sysmod);
PyObject* path_list = PyDict_GetItemString(sys_dict, "path");
printf("Adding path %s\n", path.c_str());
PyObject* more_path = PyString_FromString(path.c_str());
PyList_Append(path_list, more_path);
Py_DECREF(sysmod);
}
}
void PythonInterface::finiPython()
{
if (Py_IsInitialized() != 0)
{
Py_Finalize();
}
}
/////////////////////////////////////////////////////////////////////////////
//
// Function : CompileString
// PARAMETERS : command - string of commands to execute in the...
// : filename - filename to say where to code came from
//
// PURPOSE : run a python string in a specific module name
//
PyObject* PythonInterface::CompileString(char *command, char* filename)
{
PyObject* pycode = Py_CompileString(command, filename, Py_file_input);
return pycode;
}
/////////////////////////////////////////////////////////////////////////////
//
// Function : DumpObject
// PARAMETERS : pyobject - string of commands to execute in the...
//
// PURPOSE : marshals an object into a char string
//
hsBool PythonInterface::DumpObject(PyObject* pyobj, char** pickle, Int32* size)
{
PyObject *s; // the python string object where the marsalled object wil go
// convert object to a marshalled string python object
#if (PY_MAJOR_VERSION == 2) && (PY_MINOR_VERSION < 4)
s = PyMarshal_WriteObjectToString(pyobj);
#else
s = PyMarshal_WriteObjectToString(pyobj, 0);
#endif
// did it actually do it?
if ( s != NULL )
{
// yes, then get the size and the string address
*size = PyString_Size(s);
*pickle = PyString_AsString(s);
return true;
}
else // otherwise, there was an error
{
// Yikes! errors!
PyErr_Print(); // FUTURE: we may have to get the string to display in max...later
return false;
}
}
/////////////////////////////////////////////////////////////////////////////
//
// Function : getOutputAndReset
// PARAMETERS : none
//
// PURPOSE : get the Output to the error file to be displayed
//
int PythonInterface::getOutputAndReset(char** line)
{
PyObject* pyStr = (*PycStringIO->cgetvalue)(stdFile);
char *str = PyString_AsString( pyStr );
int size = PyString_Size( pyStr );
// reset the file back to zero
PyObject_CallMethod(stdFile,"reset","");
/*
// check to see if the debug python module is loaded
if ( dbgOut != nil )
{
// then send it the new text
if ( PyObject_CallFunction(dbgOut,"s",str) == nil )
{
// for some reason this function didn't, remember that and not call it again
dbgOut = nil;
// if there was an error make sure that the stderr gets flushed so it can be seen
PyErr_Print(); // make sure the error is printed
PyErr_Clear(); // clear the error
}
}
*/
if (line)
*line = str;
return size;
}
/////////////////////////////////////////////////////////////////////////////
//
// Function : CreateModule
// PARAMETERS : module - module name to create
//
// PURPOSE : create a new module with built-ins
//
PyObject* PythonInterface::CreateModule(char* module)
{
PyObject *m, *d;
// first we must get rid of any old modules of the same name, we'll replace it
PyObject *modules = PyImport_GetModuleDict();
if ((m = PyDict_GetItemString(modules, module)) != NULL && PyModule_Check(m))
// clear it
_PyModule_Clear(m);
// create the module
m = PyImport_AddModule(module);
if (m == NULL)
return nil;
d = PyModule_GetDict(m);
// add in the built-ins
// first make sure that we don't already have the builtins
if (PyDict_GetItemString(d, "__builtins__") == NULL)
{
// if we need the builtins then find the builtin module
PyObject *bimod = PyImport_ImportModule("__builtin__");
// then add the builtin dicitionary to our module's dictionary
if (bimod == NULL || PyDict_SetItemString(d, "__builtins__", bimod) != 0)
return nil;
Py_DECREF(bimod);
}
return m;
}
/////////////////////////////////////////////////////////////////////////////
//
// Function : RunPYC
// PARAMETERS : code - compiled code
// : module - module name to run the code in
//
// PURPOSE : run a compiled python code in a specific module name
//
hsBool PythonInterface::RunPYC(PyObject* code, PyObject* module)
{
PyObject *d, *v;
// make sure that we're given a good module... or at least one with an address
if ( !module )
{
// if no module was given then use just use the main module
module = PyImport_AddModule("__main__");
if (module == NULL)
return false;
}
// get the dictionaries for this module
d = PyModule_GetDict(module);
// run the string
v = PyEval_EvalCode((PyCodeObject*)code, d, d);
// check for errors and print them
if (v == NULL)
{
// Yikes! errors!
PyErr_Print();
return false;
}
Py_DECREF(v);
if (Py_FlushLine())
PyErr_Clear();
return true;
}
/////////////////////////////////////////////////////////////////////////////
//
// Function : GetModuleItem
// PARAMETERS : item - what item in the plasma module to get
//
// PURPOSE : get an item (probably a function) from a specific module
//
PyObject* PythonInterface::GetModuleItem(char* item, PyObject* module)
{
if ( module )
{
PyObject* d = PyModule_GetDict(module);
return PyDict_GetItemString(d, item);
}
return nil;
}