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PyException.cpp
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PyException.cpp
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/*
* PyException.cpp
* Author: Kent D. Lee
* (c) 2013
* Created on: Feb 3, 2013
*
* License:
* Please read the LICENSE file in this distribution for details regarding
* the licensing of this code. This code is freely available for educational
* use. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.
*
* Description:
* See the associated header file for a description of the purpose of this
* class. Implementation details are provided here. Read below for
* any specific details.
*
*/
#include "PyException.h"
#include "PyStr.h"
#include "PyFrame.h"
#include "PyList.h"
#include "PyBool.h"
#include <unordered_map>
#include <sstream>
using namespace std;
struct names {
static unordered_map<int, string> create_map() {
unordered_map<int, string> m;
m[PYEXCEPTION] = "Exception";
m[PYEMPTYSTACKEXCEPTION] = "EmptyStackException";
m[PYPARSEEXCEPTION] = "ParseException";
m[PYILLEGALOPERATIONEXCEPTION] = "IllegalOperationException";
m[PYWRONGARGCOUNTEXCEPTION] = "WrongArgCountExeption";
m[PYSTOPITERATIONEXCEPTION] = "StopIterationException";
m[PYMATCHEXCEPTION] = "MatchException";
return m;
}
};
static unordered_map<int, string> excnames = names::create_map();
PyException::PyException(int exception, PyObject* v) : PyObject(), exceptionType(exception), val(v) {
dict["__excmatch__"] = (PyObject* (PyObject::*)(vector<PyObject*>*)) (&PyException::__excmatch__);
}
PyException::PyException(int exception, string msg) : PyObject(), exceptionType(exception), val(new PyStr(msg)) {
dict["__excmatch__"] = (PyObject* (PyObject::*)(vector<PyObject*>*)) (&PyException::__excmatch__);
}
PyException::~PyException() {
try {
delete val;
} catch (...) {}
}
int PyException::getExceptionType() {
return exceptionType;
}
string PyException::toString() {
return val->toString();
}
PyType* PyException::getType() {
return PyTypes[PyExceptionTypeId];
}
void PyException::printTraceBack() {
for (int k=0; k<traceback.size();k++) {
cerr << "==========> At PC=" << (traceback[k]->getPC()-1) << " in this function. " << endl;
cerr << traceback[k]->getCode().prettyString("",true);
}
}
void PyException::tracebackAppend(PyFrame* frame) {
traceback.push_back(frame);
}
PyObject* PyException::__excmatch__(vector<PyObject*>* args) {
ostringstream msg;
if (args->size() != 1) {
msg << "TypeError: expected 1 arguments, got " << args->size();
throw new PyException(PYWRONGARGCOUNTEXCEPTION,msg.str()); }
PyObject* arg = (*args)[0];
//If the arg was the Exception Type, then its a match because every
//exception object should match the exception type.
if (this->getType() == arg)
return new PyBool(true);
//Otherwise, the object passed was an Exception Object. Match
//the exception values in that case.
if (this->getType() != arg->getType())
msg << "TypeError: Exception match type mismatch. Expected Exception Object got " << arg->toString();
throw new PyException(PYILLEGALOPERATIONEXCEPTION,msg.str());
PyException* other = (PyException*) arg;
return new PyBool(this->getExceptionType() == other->getExceptionType());
}
PyObject* PyException::getTraceBack() {
return new PyList((vector<PyObject*>*)&traceback);
}