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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==*/
/////////////////////////////////////////////////////////////////////////////
//
// NAME: pyEnum
//
// PURPOSE: Base class stuff for enumeration support (you don't instance this
// class
//
#include "pyEnum.h"
#include <Python.h>
#include "structmember.h"
#include "pyGlueHelpers.h"
#if HS_BUILD_FOR_MAC
#include <stdio.h>
#include <bxString.h>
#endif
struct EnumValue {
PyObject_HEAD
long value;
char* name;
};
PyObject *NewEnumValue(char const* name, long value);
static PyObject *EnumValue_new(PyTypeObject *type, PyObject *args, PyObject *)
{
EnumValue *self = (EnumValue*)type->tp_alloc(type, 0);
if (self != NULL)
{
char *nameTemp = NULL;
long value;
if (!PyArg_ParseTuple(args, "l|s", &value, &nameTemp))
{
Py_DECREF(self);
return NULL;
}
if (nameTemp) // copy the value if it was passed
{
self->name = TRACKED_NEW char[strlen(nameTemp) + 1];
strcpy(self->name, nameTemp);
self->name[strlen(nameTemp)] = '\0';
}
else
self->name = NULL;
self->value = value;
}
return (PyObject*)self;
}
static void EnumValue_dealloc(EnumValue *self)
{
if (self->name)
delete [] self->name;
self->ob_type->tp_free((PyObject*)self);
}
static int EnumValue_print(PyObject *self, FILE *fp, int flags)
{
// convert this object to a string
PyObject *strObject = (flags & Py_PRINT_RAW) ? self->ob_type->tp_str(self) : self->ob_type->tp_repr(self);
if (strObject == NULL)
return -1; // failure
const char* text = PyString_AsString(strObject);
if (text == NULL)
return -1;
fprintf(fp, text); // and print it to the file
return 0;
}
static PyObject *EnumValue_repr(PyObject *self)
{
EnumValue *obj = (EnumValue*)self;
if (obj->name == NULL)
{
// no name, so just output our value
return PyString_FromFormat("%s(%ld)", obj->ob_type->tp_name, obj->value);
}
else
{
// we have a name, so output it
return PyString_FromString(obj->name);
}
}
static PyObject* EnumValue_str(PyObject* self)
{
EnumValue *obj = (EnumValue*)self;
if (obj->name == NULL)
{
// no name, so return our value
return PyString_FromFormat("%s(%ld)", obj->ob_type->tp_name, obj->value);
}
else
{
// just return the name
return PyString_FromString(obj->name);
}
}
// forward def because the type object isn't defined yet
bool IsEnumValue(PyObject *obj);
long EnumValue_hash(PyObject *v)
{
// stolen from python's int class
if (!IsEnumValue(v))
{
PyErr_SetString(PyExc_TypeError, "hash was passed a non enum value (this would be weird)");
return 0;
}
long x = ((EnumValue*)v)->value;
if (x == -1)
x = -2;
return x;
}
int EnumValue_nonzero(EnumValue *v)
{
return v->value != 0;
}
PyObject *EnumValue_and(PyObject *v, PyObject *w)
{
EnumValue *obj = NULL;
long other = 0;
if (IsEnumValue(v))
{
obj = (EnumValue*)v;
if (!PyInt_Check(w))
{
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
other = PyInt_AsLong(w);
}
else if (IsEnumValue(w))
{
obj = (EnumValue*)w;
if (!PyInt_Check(v))
{
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
other = PyInt_AsLong(v);
}
else
{
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
return PyInt_FromLong(obj->value & other);
}
PyObject *EnumValue_xor(PyObject *v, PyObject *w)
{
EnumValue *obj = NULL;
long other = 0;
if (IsEnumValue(v))
{
obj = (EnumValue*)v;
if (!PyInt_Check(w))
{
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
other = PyInt_AsLong(w);
}
else if (IsEnumValue(w))
{
obj = (EnumValue*)w;
if (!PyInt_Check(v))
{
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
other = PyInt_AsLong(v);
}
else
{
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
return PyInt_FromLong(obj->value ^ other);
}
PyObject *EnumValue_or(PyObject *v, PyObject *w)
{
EnumValue *obj = NULL;
long other = 0;
if (IsEnumValue(v))
{
obj = (EnumValue*)v;
if (!PyInt_Check(w))
{
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
other = PyInt_AsLong(w);
}
else if (IsEnumValue(w))
{
obj = (EnumValue*)w;
if (!PyInt_Check(v))
{
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
other = PyInt_AsLong(v);
}
else
{
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
return PyInt_FromLong(obj->value | other);
}
PyObject *EnumValue_int(EnumValue *v)
{
return PyInt_FromLong(v->value);
}
PyObject *EnumValue_long(EnumValue *v)
{
return PyLong_FromLong((v->value));
}
PyObject *EnumValue_float(EnumValue *v)
{
return PyFloat_FromDouble((double)(v->value));
}
PyObject *EnumValue_oct(EnumValue *v)
{
char buf[100];
long x = v->value;
if (x < 0)
{
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
if (x == 0)
strcpy(buf, "0");
else
snprintf(buf, sizeof(buf), "0%lo", x);
return PyString_FromString(buf);
}
PyObject *EnumValue_hex(EnumValue *v)
{
char buf[100];
long x = v->value;
if (x < 0)
{
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
snprintf(buf, sizeof(buf), "0x%lx", x);
return PyString_FromString(buf);
}
int EnumValue_coerce(PyObject **pv, PyObject **pw)
{
if (PyInt_Check(*pw))
{
long x = PyInt_AsLong(*pw);
*pw = NewEnumValue(NULL, x);
Py_INCREF(*pv);
return 0;
}
else if (PyLong_Check(*pw))
{
double x = PyLong_AsDouble(*pw);
if (x == -1.0 && PyErr_Occurred())
return -1;
*pw = NewEnumValue(NULL, (long)x);
Py_INCREF(*pv);
return 0;
}
else if (PyFloat_Check(*pw))
{
double x = PyFloat_AsDouble(*pw);
*pw = NewEnumValue(NULL, (long)x);
Py_INCREF(*pv);
return 0;
}
else if (IsEnumValue(*pw))
{
Py_INCREF(*pv);
Py_INCREF(*pw);
return 0;
}
return 1; // Can't do it
}
// we support some of the number methods
PYTHON_START_AS_NUMBER_TABLE(EnumValue)
0, /*nb_add*/
0, /*nb_subtract*/
0, /*nb_multiply*/
0, /*nb_divide*/
0, /*nb_remainder*/
0, /*nb_divmod*/
0, /*nb_power*/
0, /*nb_negative*/
0, /*nb_positive*/
0, /*nb_absolute*/
(inquiry)EnumValue_nonzero, /*nb_nonzero*/
0, /*nb_invert*/
0, /*nb_lshift*/
0, /*nb_rshift*/
(binaryfunc)EnumValue_and, /*nb_and*/
(binaryfunc)EnumValue_xor, /*nb_xor*/
(binaryfunc)EnumValue_or, /*nb_or*/
(coercion)EnumValue_coerce, /*nb_coerce*/
(unaryfunc)EnumValue_int, /*nb_int*/
(unaryfunc)EnumValue_long, /*nb_long*/
(unaryfunc)EnumValue_float, /*nb_float*/
(unaryfunc)EnumValue_oct, /*nb_oct*/
(unaryfunc)EnumValue_hex, /*nb_hex*/
0, /*nb_inplace_add*/
0, /*nb_inplace_subtract*/
0, /*nb_inplace_multiply*/
0, /*nb_inplace_divide*/
0, /*nb_inplace_remainder*/
0, /*nb_inplace_power*/
0, /*nb_inplace_lshift*/
0, /*nb_inplace_rshift*/
0, /*nb_inplace_and*/
0, /*nb_inplace_xor*/
0, /*nb_inplace_or*/
0, /* nb_floor_divide */
0, /* nb_true_divide */
0, /* nb_inplace_floor_divide */
0, /* nb_inplace_true_divide */
PYTHON_END_AS_NUMBER_TABLE;
PYTHON_COMPARE_DEFINITION(EnumValue, v, w)
{
long i = 0;
long j = 0;
if (IsEnumValue(v))
{
i = ((EnumValue*)v)->value;
if (PyInt_Check(w))
j = PyInt_AsLong(w);
else if (PyFloat_Check(w))
j = (long)PyFloat_AsDouble(w);
else if (PyLong_Check(w))
j = PyLong_AsLong(w);
else if (IsEnumValue(w))
j = ((EnumValue*)w)->value;
else
{
PyErr_SetString(PyExc_TypeError, "cannot compare EnumValue to a non number");
return 0;
}
}
else if (IsEnumValue(w))
{
j = ((EnumValue*)w)->value;
if (PyInt_Check(v))
i = PyInt_AsLong(v);
else if (PyFloat_Check(v))
i = (long)PyFloat_AsDouble(v);
else if (PyLong_Check(v))
i = PyLong_AsLong(v);
else if (IsEnumValue(v))
i = ((EnumValue*)v)->value;
else
{
PyErr_SetString(PyExc_TypeError, "cannot compare EnumValue to a non number");
return 0;
}
}
else
{
PyErr_SetString(PyExc_TypeError, "cannot compare EnumValue to a non number");
return 0;
}
if (i < j)
PYTHON_COMPARE_LESS_THAN;
else if (i > j)
PYTHON_COMPARE_GREATER_THAN;
PYTHON_COMPARE_EQUAL;
}
PYTHON_NO_INIT_DEFINITION(EnumValue)
PYTHON_START_METHODS_TABLE(EnumValue)
PYTHON_END_METHODS_TABLE;
PYTHON_TYPE_START(EnumValue)
0,
"PlasmaConstants.EnumValue",
sizeof(EnumValue), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)EnumValue_dealloc, /* tp_dealloc */
EnumValue_print, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
PYTHON_DEFAULT_COMPARE(EnumValue), /* tp_compare */
EnumValue_repr, /* tp_repr */
PYTHON_DEFAULT_AS_NUMBER(EnumValue),/* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
EnumValue_hash, /* tp_hash */
0, /* tp_call */
EnumValue_str, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT
| Py_TPFLAGS_BASETYPE
| Py_TPFLAGS_CHECKTYPES, /* tp_flags */
"A basic enumeration value", /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
PYTHON_DEFAULT_METHODS_TABLE(EnumValue), /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
PYTHON_DEFAULT_INIT(EnumValue), /* tp_init */
0, /* tp_alloc */
EnumValue_new /* tp_new */
PYTHON_TYPE_END;
bool IsEnumValue(PyObject *obj)
{
return PyObject_TypeCheck(obj, &EnumValue_type);
}
PyObject *NewEnumValue(char const* name, long value)
{
PyObject *tempArgs = NULL;
if (name)
tempArgs = Py_BuildValue("(ls)", value, name); // args are value, name
else
tempArgs = Py_BuildValue("(l)", value); // args are value only
EnumValue *newObj = (EnumValue*)EnumValue_type.tp_new(&EnumValue_type, tempArgs, NULL);
Py_DECREF(tempArgs); // clean up the temps
return (PyObject*)newObj;
}
// Now for the Enum base class
struct Enum
{
PyObject_HEAD
PyObject *values; // the values list
PyObject *lookup; // the enum values, key is enum, value is enum value
PyObject *reverseLookup; // the enum values, key is enum value, value is enum
};
static PyObject *Enum_new(PyTypeObject *type, PyObject *, PyObject *)
{
Enum *self = (Enum*)type->tp_alloc(type, 0);
if (self != NULL)
{
self->values = PyDict_New();
if (self->values == NULL)
{
Py_DECREF(self);
return NULL;
}
self->lookup = PyDict_New();
if (self->lookup == NULL)
{
Py_DECREF(self);
return NULL;
}
self->reverseLookup = PyDict_New();
if (self->reverseLookup == NULL)
{
Py_DECREF(self);
return NULL;
}
}
return (PyObject*)self;
}
static int Enum_traverse(Enum *self, visitproc visit, void *arg)
{
if (self->values && visit(self->values, arg) < 0)
return -1;
if (self->lookup && visit(self->lookup, arg) < 0)
return -1;
if (self->reverseLookup && visit(self->reverseLookup, arg) < 0)
return -1;
return 0;
}
static int Enum_clear(Enum *self)
{
Py_XDECREF(self->values);
self->values = NULL;
Py_XDECREF(self->lookup);
self->lookup = NULL;
Py_XDECREF(self->reverseLookup);
self->reverseLookup = NULL;
return 0;
}
static void Enum_dealloc(Enum *self)
{
Enum_clear(self);
self->ob_type->tp_free((PyObject*)self);
}
static PyObject *Enum_getattro(PyObject *self, PyObject *attr_name)
{
if (!PyString_Check(attr_name))
{
PyErr_SetString(PyExc_TypeError, "getattro expects a string argument");
PYTHON_RETURN_ERROR;
}
Enum *theEnum = (Enum*)self;
PyObject *item = PyDict_GetItem(theEnum->lookup, attr_name);
if (!item)
{
PyErr_Clear(); // wasn't in the dictionary, check to see if they want the values or lookup dict
char *name = PyString_AsString(attr_name);
if (strcmp(name, "values") == 0)
{
Py_INCREF(theEnum->values);
return theEnum->values;
}
else if (strcmp(name, "lookup") == 0)
{
Py_INCREF(theEnum->lookup);
return theEnum->lookup;
}
else if (strcmp(name, "reverseLookup") == 0)
{
Py_INCREF(theEnum->reverseLookup);
return theEnum->reverseLookup;
}
return PyObject_GenericGetAttr(self, attr_name); // let the default method handle it
}
Py_INCREF(item);
return item;
}
static int Enum_setattro(PyObject *self, PyObject *attr_name, PyObject *value)
{
if (!PyString_Check(attr_name))
{
PyErr_SetString(PyExc_TypeError, "setattro expects a string argument");
return -1;;
}
Enum *theEnum = (Enum*)self;
PyObject *item = PyDict_GetItem(theEnum->lookup, attr_name);
if (!item)
{
PyErr_Clear(); // wasn't in the dictionary, check to see if they want the values or lookup dict
char *name = PyString_AsString(attr_name);
if (strcmp(name, "values") == 0)
{
PyErr_SetString(PyExc_RuntimeError, "Cannot set the value attribute");
return -1;
}
else if (strcmp(name, "lookup") == 0)
{
PyErr_SetString(PyExc_RuntimeError, "Cannot set the lookup attribute");
return -1;
}
else if (strcmp(name, "reverseLookup") == 0)
{
PyErr_SetString(PyExc_RuntimeError, "Cannot set the reverseLookup attribute");
return -1;
}
// they aren't trying to set an enum value or any of our special values, so let them
return PyObject_GenericSetAttr(self, attr_name, value); // let the default method handle it
}
PyErr_SetString(PyExc_RuntimeError, "Cannot set any enum value");
return -1;
}
PYTHON_NO_INIT_DEFINITION(Enum)
PYTHON_START_METHODS_TABLE(Enum)
PYTHON_END_METHODS_TABLE;
PYTHON_TYPE_START(Enum)
0,
"PlasmaConstants.Enum",
sizeof(Enum), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)Enum_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
Enum_getattro, /* tp_getattro */
Enum_setattro, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT
| Py_TPFLAGS_BASETYPE
| Py_TPFLAGS_HAVE_GC, /* tp_flags */
"Enum base class", /* tp_doc */
(traverseproc)Enum_traverse, /* tp_traverse */
(inquiry)Enum_clear, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
PYTHON_DEFAULT_METHODS_TABLE(Enum), /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
PYTHON_DEFAULT_INIT(Enum), /* tp_init */
0, /* tp_alloc */
Enum_new /* tp_new */
PYTHON_TYPE_END;
// creates and sets up the enum base class
void pyEnum::AddPlasmaConstantsClasses(PyObject *m)
{
PYTHON_CLASS_IMPORT_START(m);
PYTHON_CLASS_IMPORT(m, EnumValue);
PYTHON_CLASS_IMPORT(m, Enum);
PYTHON_CLASS_IMPORT_END(m);
}
// makes an enum object using the specified name and values
void pyEnum::MakeEnum(PyObject *m, const char* name, std::map<std::string, int> values)
{
if (m == NULL)
return;
Enum *newEnum = (Enum*)Enum_type.tp_new(&Enum_type, NULL, NULL);
if (newEnum == NULL)
{
std::string errorStr = "Could not create enum named ";
errorStr += name;
PyErr_SetString(PyExc_RuntimeError, errorStr.c_str());
return;
}
PyObject *valuesDict = newEnum->values;
PyObject *lookupDict = newEnum->lookup;
PyObject *reverseLookupDict = newEnum->reverseLookup;
for (std::map<std::string, int>::iterator curValue = values.begin(); curValue != values.end(); curValue++)
{
std::string key = curValue->first;
int value = curValue->second;
std::string enumValueName = name;
enumValueName += "." + key;
PyObject *newValue = NewEnumValue(enumValueName.c_str(), value);
PyObject *valueObj = PyInt_FromLong((long)value);
PyObject *keyObj = PyString_FromString(key.c_str());
PyDict_SetItem(valuesDict, valueObj, newValue);
PyDict_SetItem(lookupDict, keyObj, newValue);
PyDict_SetItem(reverseLookupDict, newValue, keyObj);
Py_DECREF(keyObj);
Py_DECREF(valueObj);
Py_DECREF(newValue);
}
PyModule_AddObject(m, (char*)name, (PyObject*)newEnum);
}