C++ PySys_GetObject函数代码示例

void Plugins::loadFromPath(const ppl6::CString &Path)
{
#ifdef HAVE_PYTHON
	ppl6::CDir Dir;
	if (!Dir.Open(Path)) return;

	PyObject *sysPath = PySys_GetObject("path");
	PyObject *path = PyString_FromString(Path);
	int result = PyList_Insert(sysPath, 0, path);
	Py_DECREF(path);


	Dir.Reset();
	const ppl6::CDirEntry *entry;
	while ((entry=Dir.GetNextPattern("*.py"))) {
		ppl6::CArray matches;
		if (entry->Filename.PregMatch("/^(.*?)\\.py$/i",matches)) {
			ppl6::CString ModuleName=matches.GetString(1);
			printf ("Loading Plugin: %s\n",(const char*)ModuleName);
			python_modules.push_back(ModuleName);
			PyRun_SimpleString("import "+ModuleName+"\n");
		}
	}
#endif
}

static void mywrite(const char* name, FILE* fp, const char* format, va_list va) noexcept {
    PyObject* file;
    PyObject* error_type, *error_value, *error_traceback;

    PyErr_Fetch(&error_type, &error_value, &error_traceback);
    file = PySys_GetObject(name);
    if (file == NULL || PyFile_AsFile(file) == fp)
        vfprintf(fp, format, va);
    else {
        char buffer[1001];
        const int written = PyOS_vsnprintf(buffer, sizeof(buffer), format, va);
        if (PyFile_WriteString(buffer, file) != 0) {
            PyErr_Clear();
            fputs(buffer, fp);
        }
        if (written < 0 || (size_t)written >= sizeof(buffer)) {
            const char* truncated = "... truncated";
            if (PyFile_WriteString(truncated, file) != 0) {
                PyErr_Clear();
                fputs(truncated, fp);
            }
        }
    }
    PyErr_Restore(error_type, error_value, error_traceback);
}

static PyObject *__Pyx_GetStdout(void) {
	PyObject *f = PySys_GetObject("stdout");
	if (!f) {
		PyErr_SetString(PyExc_RuntimeError, "lost sys.stdout");
	}
	return f;
}

PyMODINIT_FUNC
PyOtherSide_init()
{
    PyObject *pyotherside = PyModule_Create(&PyOtherSideModule);

    // Format constants for the image provider return value format
    // see http://qt-project.org/doc/qt-5.1/qtgui/qimage.html#Format-enum
    PyModule_AddIntConstant(pyotherside, "format_mono", QImage::Format_Mono);
    PyModule_AddIntConstant(pyotherside, "format_mono_lsb", QImage::Format_MonoLSB);
    PyModule_AddIntConstant(pyotherside, "format_rgb32", QImage::Format_RGB32);
    PyModule_AddIntConstant(pyotherside, "format_argb32", QImage::Format_ARGB32);
    PyModule_AddIntConstant(pyotherside, "format_rgb16", QImage::Format_RGB16);
    PyModule_AddIntConstant(pyotherside, "format_rgb666", QImage::Format_RGB666);
    PyModule_AddIntConstant(pyotherside, "format_rgb555", QImage::Format_RGB555);
    PyModule_AddIntConstant(pyotherside, "format_rgb888", QImage::Format_RGB888);
    PyModule_AddIntConstant(pyotherside, "format_rgb444", QImage::Format_RGB444);

    // Custom constant - pixels are to be interpreted as encoded image file data
    PyModule_AddIntConstant(pyotherside, "format_data", -1);

    PyObject *meta_path = PySys_GetObject("meta_path");
    if (meta_path != NULL)
    {
        PyList_Append(meta_path, pyotherside);
    }

    return pyotherside;
}

/**
 * Add an additional search directory for the protocol decoders.
 *
 * The specified directory is prepended (not appended!) to Python's sys.path,
 * in order to search for sigrok protocol decoders in the specified
 * directories first, and in the generic Python module directories (and in
 * the current working directory) last. This avoids conflicts if there are
 * Python modules which have the same name as a sigrok protocol decoder in
 * sys.path or in the current working directory.
 *
 * @param path Path to the directory containing protocol decoders which shall
 *             be added to the Python sys.path, or NULL.
 *
 * @return SRD_OK upon success, a (negative) error code otherwise.
 *
 * @private
 *
 * @since 0.1.0
 */
SRD_PRIV int srd_decoder_searchpath_add(const char *path)
{
	PyObject *py_cur_path, *py_item;

	srd_dbg("Adding '%s' to module path.", path);

	py_cur_path = PySys_GetObject("path");
	if (!py_cur_path)
		return SRD_ERR_PYTHON;

	py_item = PyUnicode_FromString(path);
	if (!py_item) {
		srd_exception_catch("Failed to create Unicode object");
		return SRD_ERR_PYTHON;
	}
	if (PyList_Insert(py_cur_path, 0, py_item) < 0) {
		srd_exception_catch("Failed to insert path element");
		Py_DECREF(py_item);
		return SRD_ERR_PYTHON;
	}
	Py_DECREF(py_item);

	searchpaths = g_slist_prepend(searchpaths, g_strdup(path));

	return SRD_OK;
}

PyObject *set_stdstream(std::string name, PyObject *pystream) {
  PyObject *old_pystream = PySys_GetObject(const_cast<char*>(name.c_str())); // borrowed
  Py_XINCREF(pystream);
  PySys_SetObject(const_cast<char*>(name.c_str()), pystream);
  Py_XDECREF(old_pystream);
  return old_pystream;
}

void
TraCIServer::runEmbedded(std::string pyFile) {
    PyObject* pName, *pModule;
    Py_Initialize();
    Py_InitModule("traciemb", EmbMethods);
    if (pyFile.length() > 3 && !pyFile.compare(pyFile.length() - 3, 3, ".py")) {
        PyObject* sys_path, *path;
        char pathstr[] = "path";
        sys_path = PySys_GetObject(pathstr);
        if (sys_path == NULL || !PyList_Check(sys_path)) {
            throw ProcessError("Could not access python sys.path!");
        }
        path = PyString_FromString(FileHelpers::getFilePath(pyFile).c_str());
        PyList_Insert(sys_path, 0, path);
        Py_DECREF(path);
        FILE* pFile = fopen(pyFile.c_str(), "r");
        if (pFile == NULL) {
            throw ProcessError("Failed to load \"" + pyFile + "\"!");
        }
        PyRun_SimpleFile(pFile, pyFile.c_str());
        fclose(pFile);
    } else {
        pName = PyString_FromString(pyFile.c_str());
        /* Error checking of pName left out */
        pModule = PyImport_Import(pName);
        Py_DECREF(pName);
        if (pModule == NULL) {
            PyErr_Print();
            throw ProcessError("Failed to load \"" + pyFile + "\"!");
        }
    }
    Py_Finalize();
}

PyObject* 
init_local_module(PyObject *m)
{
    PyObject *d, *sd, *v;
    PyObject *sys_modules, *module;
    PyMethodDef *ml;
    

#ifdef PY3
    PyObject *mod_name = PyUnicode_FromString(MODULE_NAME "." LOCAL_MOD_NAME);
#else
    PyObject *mod_name = PyBytes_FromString(MODULE_NAME "." LOCAL_MOD_NAME);
#endif
    
    if(mod_name == NULL){
        return NULL;
    }

    LocalObjectType.tp_new = PyType_GenericNew;
    if(PyType_Ready(&LocalObjectType) < 0){
        return NULL;
    }

    sys_modules = PySys_GetObject("modules");
    d = PyModule_GetDict(m);
    module = PyDict_GetItem(d, mod_name);
    if(module == NULL) {
        module = PyModule_New(MODULE_NAME "." LOCAL_MOD_NAME);
        if(module != NULL) {
            PyDict_SetItem(sys_modules, mod_name, module);
            PyModule_AddObject(m, LOCAL_MOD_NAME, module);
        }
    }
    sd = PyModule_GetDict(module);
    for(ml = LocalMod_methods; ml->ml_name != NULL; ml++){
        v = PyCFunction_NewEx(ml, (PyObject *)NULL, mod_name);
        if(v == NULL) {
            goto fin;
        }
        if(PyDict_SetItemString(sd, ml->ml_name, v) != 0){
            Py_DECREF(v);
            return NULL;
        }
        Py_DECREF(v);
    }

fin:
    Py_DECREF(mod_name);

    Py_INCREF(&LocalObjectType);
    PyModule_AddObject(module, "local", (PyObject *)&LocalObjectType);
    
#ifdef PY3
    dict_key = PyUnicode_FromString("_jega_local_dict__");
#else
    dict_key = PyBytes_FromString("_jega_local_dict__");
#endif
    return module;
}

void python_script_error_jump(const char *filepath, int *lineno, int *offset)
{
  PyObject *exception, *value;
  PyTracebackObject *tb;

  *lineno = -1;
  *offset = 0;

  PyErr_Fetch(&exception, &value, (PyObject **)&tb);

  if (exception && PyErr_GivenExceptionMatches(exception, PyExc_SyntaxError)) {
    /* no traceback available when SyntaxError.
     * python has no api's to this. reference parse_syntax_error() from pythonrun.c */
    PyErr_NormalizeException(&exception, &value, (PyObject **)&tb);
    PyErr_Restore(exception, value, (PyObject *)tb); /* takes away reference! */

    if (value) { /* should always be true */
      PyObject *message;
      PyObject *filename_py, *text_py;

      if (parse_syntax_error(value, &message, &filename_py, lineno, offset, &text_py)) {
        const char *filename = _PyUnicode_AsString(filename_py);
        /* python adds a '/', prefix, so check for both */
        if ((BLI_path_cmp(filename, filepath) == 0) ||
            ((filename[0] == '\\' || filename[0] == '/') &&
             BLI_path_cmp(filename + 1, filepath) == 0)) {
          /* good */
        }
        else {
          *lineno = -1;
        }
      }
      else {
        *lineno = -1;
      }
    }
  }
  else {
    PyErr_NormalizeException(&exception, &value, (PyObject **)&tb);
    PyErr_Restore(exception, value, (PyObject *)tb); /* takes away reference! */
    PyErr_Print();

    for (tb = (PyTracebackObject *)PySys_GetObject("last_traceback");
         tb && (PyObject *)tb != Py_None;
         tb = tb->tb_next) {
      PyObject *coerce;
      const char *tb_filepath = traceback_filepath(tb, &coerce);
      const int match = ((BLI_path_cmp(tb_filepath, filepath) == 0) ||
                         ((tb_filepath[0] == '\\' || tb_filepath[0] == '/') &&
                          BLI_path_cmp(tb_filepath + 1, filepath) == 0));
      Py_DECREF(coerce);

      if (match) {
        *lineno = tb->tb_lineno;
        /* used to break here, but better find the inner most line */
      }
    }
  }
}

  python_bridge_guard(){
    Py_Initialize();

    PyObject* sysPath = PySys_GetObject((char*)"path");
    PyObject* curDir = PyString_FromString(".");
    PyList_Append(sysPath, curDir);
    Py_DECREF(curDir);
  }

 PythonRedirector(const char* type, PyObject* obj) : std_out(type), out(obj), old(0)
 {
     if (out) {
         Base::PyGILStateLocker lock;
         old = PySys_GetObject(const_cast<char*>(std_out));
         PySys_SetObject(const_cast<char*>(std_out), out);
     }
 }

		CPyInstance() {
			Py_Initialize();

			// Add current dir to system path
			PyObject* sysPath = PySys_GetObject((char*)"path");
			PyList_Append(sysPath, PyString_FromString("."));

		}

/*
* Method to call TUFs configure method. This function takes the JSON interposition filename
* as well as the parent repository directory and the parent ssl certificate directory, and
* configures TUF to interpose on update calls
*/
bool Py_TUF_configure(char* tuf_intrp_json, char* p_repo_dir, char* p_ssl_cert_dir) {
//PyObject* Py_TUF_configure(char* tuf_intrp_json, char* p_repo_dir, char* p_ssl_cert_dir){
    // Init the python env
    Py_Initialize();

	//add the current directory to the places to search for TUF
	PyObject *path = PySys_GetObject( (char *)"path" );
	PyObject *currentDirectory = PyString_FromString( "." );
	PyList_Append( path, currentDirectory );
	Py_XDECREF( currentDirectory );

	//import TUF module
	PyObject *moduleName = PyString_FromString( "tuf.interposition" );
	PyObject *tufInterMod = PyImport_Import( moduleName );
	if ( tufInterMod == NULL ) {
		PyErr_Print();
		return false;
	}
	Py_XDECREF( moduleName );
	
	//get the configure function from tuf.interposition
	PyObject *configFunction = PyObject_GetAttrString( tufInterMod, "configure" );
	if ( configFunction == NULL ) {
		PyErr_Print();
		return false;
	}
	Py_XDECREF( tufInterMod );
	
	//convert arguements into Python types and create tuple for CallObject function
	PyObject *args = PyTuple_New( 3 );
    PyObject *arg0 = PyString_FromString( tuf_intrp_json );
    PyTuple_SetItem(args, 0, arg0);
    PyObject *arg1 = PyString_FromString( p_repo_dir );
    PyTuple_SetItem(args, 1, arg1);
    PyObject *arg2 = PyString_FromString( p_ssl_cert_dir );
    PyTuple_SetItem(args, 2, arg2);

	//calls the config function from the tuf.interposition module
	//returns a dictionary with the configurations	
	//we are currently storing this globally 	
	configDict = PyObject_CallObject( configFunction, args );

	//Py_XDECREF( arg0 );
	//Py_XDECREF( arg1 );
	//Py_XDECREF( arg2 );
	//Py_XDECREF( args );
	//Py_XDECREF( configFunction );

	if ( configDict == NULL ) {
		PyErr_Print();
		return false;
	}


	printf( "TUF configured.\n" );
	return true;
	//return configDict;
}

static int
tok_stdin_decode(struct tok_state *tok, char **inp)
{
	PyObject *enc, *sysstdin, *decoded, *utf8;
	const char *encoding;
	char *converted;

	if (PySys_GetFile((char *)"stdin", NULL) != stdin)
		return 0;
	sysstdin = PySys_GetObject("stdin");
	if (sysstdin == NULL || !PyFile_Check(sysstdin))
		return 0;

	enc = ((PyFileObject *)sysstdin)->f_encoding;
	if (enc == NULL || !PyString_Check(enc))
		return 0;
	Py_INCREF(enc);

	encoding = PyString_AsString(enc);
	decoded = PyUnicode_Decode(*inp, strlen(*inp), 0, encoding, NULL);
	if (decoded == NULL)
		goto error_clear;

	utf8 = PyUnicode_AsEncodedString(decoded, "utf-8", NULL);
	Py_DECREF(decoded);
	if (utf8 == NULL)
		goto error_clear;

	assert(PyString_Check(utf8));
	converted = new_string(PyString_AS_STRING(utf8),
			       PyString_GET_SIZE(utf8));
	Py_DECREF(utf8);
	if (converted == NULL)
		goto error_nomem;

	PyMem_FREE(*inp);
	*inp = converted;
	if (tok->encoding != NULL)
		PyMem_FREE(tok->encoding);
	tok->encoding = new_string(encoding, strlen(encoding));
	if (tok->encoding == NULL)
		goto error_nomem;

	Py_DECREF(enc);
	return 0;

error_nomem:
	Py_DECREF(enc);
	tok->done = E_NOMEM;
	return -1;

error_clear:
	/* Fallback to iso-8859-1: for backward compatibility */
	Py_DECREF(enc);
	PyErr_Clear();
	return 0;
}

/* Add to the list of script load paths */
void pyloader_add_script_path(const char *path)
{
    PyObject *ppath = PySys_GetObject("path");
    if (ppath)
    {
        PyList_Append(ppath, PyString_FromString(path));
        script_paths = g_slist_append(script_paths, g_strdup(path));
    }
}