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/*
* upb - a minimalist implementation of protocol buffers.
*
* Copyright (c) 2009 Google Inc. See LICENSE for details.
* Author: Josh Haberman <jhaberman@gmail.com>
*
* Python extension exposing the core of upb: definitions, handlers,
* and a message type.
*/
#include <Python.h>
#include "upb/def.h"
static bool streql(const char *a, const char *b) { return strcmp(a, b) == 0; }
PyObject *PyUpb_Error(const char *str) {
PyErr_SetString(PyExc_TypeError, str);
return NULL;
}
int PyUpb_ErrorInt(const char *str) {
PyErr_SetString(PyExc_TypeError, str);
return -1;
}
/* PyUpb_Def ******************************************************************/
// All the def types share the same C layout, even though they are different
// Python types. For the moment we don't bother trying to make them an actual
// inheritance hierarchy.
typedef struct {
PyObject_HEAD;
upb_def *def;
} PyUpb_Def;
/* PyUpb_FieldDef *************************************************************/
typedef struct {
PyObject_HEAD;
upb_fielddef *field;
} PyUpb_FieldDef;
static PyTypeObject PyUpb_FieldDefType;
#define Check_FieldDef(obj, badret) \
(void*)obj; do { \
if(!PyObject_TypeCheck(obj, &PyUpb_FieldDefType)) { \
PyErr_SetString(PyExc_TypeError, "must be a upb.FieldDef"); \
return badret; \
} \
} while(0)
static void PyUpb_FieldDef_dealloc(PyObject *obj) {
PyUpb_FieldDef *f = (void*)obj;
upb_fielddef_unref(f->field);
obj->ob_type->tp_free(obj);
}
static PyObject* PyUpb_FieldDef_getattro(PyObject *obj, PyObject *attr_name) {
PyUpb_FieldDef *f = Check_FieldDef(obj, NULL);
const char *name = PyString_AsString(attr_name);
if (streql(name, "name")) {
return PyString_FromString(upb_fielddef_name(f->field));
} else if (streql(name, "number")) {
return PyInt_FromLong(upb_fielddef_number(f->field));
} else if (streql(name, "type")) {
return PyInt_FromLong(upb_fielddef_type(f->field));
} else if (streql(name, "label")) {
return PyInt_FromLong(upb_fielddef_label(f->field));
} else if (streql(name, "subdef")) {
// NYI;
return NULL;
} else if (streql(name, "msgdef")) {
// NYI;
return NULL;
} else {
return PyUpb_Error("Invalid fielddef member.");
}
}
static int PyUpb_FieldDef_setattro(PyObject *o, PyObject *key, PyObject *val) {
PyUpb_FieldDef *f = Check_FieldDef(o, -1);
const char *field = PyString_AsString(key);
if (!upb_fielddef_ismutable(f->field))
return PyUpb_ErrorInt("fielddef is not mutable.");
if (streql(field, "name")) {
const char *name = PyString_AsString(val);
if (!name || !upb_fielddef_setname(f->field, name))
return PyUpb_ErrorInt("Invalid name");
} else if (streql(field, "number")) {
// TODO: should check truncation. Non-security issue.
// Non-int will return -1, which is already invalid as a field number.
if (!upb_fielddef_setnumber(f->field, PyInt_AsLong(val)))
return PyUpb_ErrorInt("Invalid number");
} else if (streql(field, "type")) {
// TODO: should check truncation. Non-security issue.
if (!upb_fielddef_settype(f->field, PyInt_AsLong(val)))
return PyUpb_ErrorInt("Invalid type");
} else if (streql(field, "label")) {
// TODO: should check truncation. Non-security issue.
if (!upb_fielddef_setlabel(f->field, PyInt_AsLong(val)))
return PyUpb_ErrorInt("Invalid label");
} else if (streql(field, "type_name")) {
const char *name = PyString_AsString(val);
if (!name || !upb_fielddef_settypename(f->field, name))
return PyUpb_ErrorInt("Invalid type_name");
} else if (streql(field, "default_value")) {
// NYI
return -1;
} else {
return PyUpb_ErrorInt("Invalid fielddef member.");
}
return 0;
}
static int PyUpb_FieldDef_init(PyObject *self, PyObject *args, PyObject *kwds) {
if (!kwds) return 0;
PyObject *key, *value;
Py_ssize_t pos = 0;
while (PyDict_Next(kwds, &pos, &key, &value))
PyUpb_FieldDef_setattro(self, key, value);
return 0;
}
static PyObject *PyUpb_FieldDef_new(PyTypeObject *subtype,
PyObject *args, PyObject *kwds) {
PyUpb_FieldDef *f = (PyUpb_FieldDef*)subtype->tp_alloc(subtype, 0);
f->field = upb_fielddef_new();
return (PyObject*)f;
}
static PyTypeObject PyUpb_FieldDefType = {
PyObject_HEAD_INIT(NULL)
0, /* ob_size */
"upb.FieldDef", /* tp_name */
sizeof(PyUpb_FieldDef), /* tp_basicsize */
0, /* tp_itemsize */
&PyUpb_FieldDef_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, /* TODO */ /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
&PyUpb_FieldDef_getattro, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT, /* tp_flags */
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
0, /* 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 */
&PyUpb_FieldDef_init, /* tp_init */
0, /* tp_alloc */
&PyUpb_FieldDef_new, /* tp_new */
0, /* tp_free */
};
static PyMethodDef methods[] = {
{NULL, NULL}
};
PyMODINIT_FUNC initupb(void) {
PyObject *mod = Py_InitModule("upb", methods);
if (PyType_Ready(&PyUpb_FieldDefType) < 0) return;
// PyModule_AddObject steals a ref, but our object is statically allocated
// and must not be deleted.
Py_INCREF(&PyUpb_FieldDefType);
PyModule_AddObject(mod, "FieldDef", (PyObject*)&PyUpb_FieldDefType);
}
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