#include "Interpreter.h" #include #include #include PyThreadState* Interpreter::MainThreadState = NULL; Interpreter::Interpreter( ) { PyEval_AcquireThread( MainThreadState ); m_threadState = Py_NewInterpreter( ); PyObject *module = PyImport_ImportModule("__main__"); loc = glb = PyModule_GetDict(module); PyRun_SimpleString("import sys\n" "import redirector\n" "sys.path.insert(0, \".\")\n" // add current path "sys.stdout = redirector.redirector()\n" "sys.stderr = sys.stdout\n" "import rlcompleter\n" "sys.completer = rlcompleter.Completer()\n" ); PyEval_ReleaseThread( m_threadState ); } Interpreter::~Interpreter( ) { PyEval_AcquireThread( m_threadState ); Py_EndInterpreter( m_threadState ); PyEval_ReleaseLock( ); } void Interpreter::test( ) { PyEval_AcquireThread( m_threadState ); PyObject* py_result; PyObject* dum; std::string command = "print 'Hello world'\n"; py_result = Py_CompileString(command.c_str(), "", Py_single_input); if ( py_result == 0 ) { std::cout << "Huh?\n"; PyEval_ReleaseThread( m_threadState ); return; } dum = PyEval_EvalCode (py_result, glb, loc); Py_XDECREF (dum); Py_XDECREF (py_result); std::cout << GetResultString( m_threadState ); GetResultString( m_threadState ) = ""; PyEval_ReleaseThread( m_threadState ); } template std::string string_format( const std::string& format, Args ... args ) { size_t size = std::snprintf( nullptr, 0, format.c_str(), args ... ) + 1; // Extra space for '\0' std::unique_ptr buf( new char[ size ] ); std::snprintf( buf.get(), size, format.c_str(), args ... ); return std::string( buf.get(), buf.get() + size - 1 ); // We don't want the '\0' inside } std::string Interpreter::interpret( const std::string& command, int* errorCode ) { PyEval_AcquireThread( m_threadState ); *errorCode = 0; PyObject* py_result; PyObject* dum; std::string res; py_result = Py_CompileString(command.c_str(), "", Py_single_input); if ( py_result == 0 ) { if ( PyErr_Occurred( ) ) { *errorCode = 1; PyErr_Print( ); res = GetResultString( m_threadState ); GetResultString( m_threadState ) = ""; } PyEval_ReleaseThread( m_threadState ); return res; } dum = PyEval_EvalCode (py_result, glb, loc); Py_XDECREF (dum); Py_XDECREF (py_result); if ( PyErr_Occurred( ) ) { *errorCode = 1; PyErr_Print( ); } res = GetResultString( m_threadState ); GetResultString( m_threadState ) = ""; PyEval_ReleaseThread( m_threadState ); return res; } const std::list& Interpreter::suggest( const std::string& hint ) { PyEval_AcquireThread( m_threadState ); m_suggestions.clear(); int i = 0; std::string command = string_format("sys.completer.complete('%s', %d)\n", hint.c_str(),i); std::string res; do { PyObject* py_result; PyObject* dum; py_result = Py_CompileString(command.c_str(), "", Py_single_input); dum = PyEval_EvalCode (py_result, glb, loc); Py_XDECREF (dum); Py_XDECREF (py_result); res = GetResultString( m_threadState ); GetResultString( m_threadState ) = ""; ++i; command = string_format("sys.completer.complete('%s', %d)\n", hint.c_str(),i); if (res.size()) { // throw away the newline res = res.substr(1, res.size() - 3); m_suggestions.push_back(res); } } while (res.size()); PyEval_ReleaseThread( m_threadState ); return m_suggestions; } void Interpreter::Initialize( ) { PyImport_AppendInittab("redirector", Interpreter::PyInit_redirector); Py_Initialize( ); PyEval_InitThreads( ); MainThreadState = PyEval_SaveThread( ); } void Interpreter::Finalize( ) { PyEval_RestoreThread( MainThreadState ); Py_Finalize( ); } std::string& Interpreter::GetResultString( PyThreadState* threadState ) { static std::map< PyThreadState*, std::string > ResultStrings; if ( !ResultStrings.count( threadState ) ) { ResultStrings[ threadState ] = ""; } return ResultStrings[ threadState ]; } PyObject* Interpreter::RedirectorInit(PyObject *, PyObject *) { Py_INCREF(Py_None); return Py_None; } PyObject* Interpreter::RedirectorWrite(PyObject *, PyObject *args) { char* output; PyObject *selfi; if (!PyArg_ParseTuple(args,"Os",&selfi,&output)) { return NULL; } std::string outputString( output ); PyThreadState* currentThread = PyThreadState_Get( ); std::string& resultString = GetResultString( currentThread ); resultString = resultString + outputString; Py_INCREF(Py_None); return Py_None; } PyMethodDef Interpreter::RedirectorMethods[] = { {"__init__", Interpreter::RedirectorInit, METH_VARARGS, "initialize the stdout/err redirector"}, {"write", Interpreter::RedirectorWrite, METH_VARARGS, "implement the write method to redirect stdout/err"}, {NULL,NULL,0,NULL}, }; PyObject *createClassObject(const char *name, PyMethodDef methods[]) { PyObject *pClassName = PyUnicode_FromString(name); PyObject *pClassBases = PyTuple_New(0); // An empty tuple for bases is equivalent to `(object,)` PyObject *pClassDic = PyDict_New(); PyMethodDef *def; // add methods to class for (def = methods; def->ml_name != NULL; def++) { PyObject *func = PyCFunction_New(def, NULL); PyObject *method = PyInstanceMethod_New(func); PyDict_SetItemString(pClassDic, def->ml_name, method); Py_DECREF(func); Py_DECREF(method); } // pClass = type(pClassName, pClassBases, pClassDic) PyObject *pClass = PyObject_CallFunctionObjArgs((PyObject *)&PyType_Type, pClassName, pClassBases, pClassDic, NULL); Py_DECREF(pClassName); Py_DECREF(pClassBases); Py_DECREF(pClassDic); return pClass; } PyMODINIT_FUNC Interpreter::PyInit_redirector(void) { static struct PyModuleDef moduledef = { PyModuleDef_HEAD_INIT, "redirector", 0, -1, 0 }; PyObject *m = PyModule_Create(&moduledef); if (m) { PyObject *fooClass = createClassObject("redirector", RedirectorMethods); PyModule_AddObject(m, "redirector", fooClass); Py_DECREF(fooClass); } return m; } '>111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190