mirror of https://github.com/acidanthera/audk.git
541 lines
16 KiB
C
541 lines
16 KiB
C
/* Implementation helper: a struct that looks like a tuple. See timemodule
|
|
and posixmodule for example uses. */
|
|
|
|
#include "Python.h"
|
|
#include "structmember.h"
|
|
#include "structseq.h"
|
|
|
|
static char visible_length_key[] = "n_sequence_fields";
|
|
static char real_length_key[] = "n_fields";
|
|
static char unnamed_fields_key[] = "n_unnamed_fields";
|
|
|
|
/* Fields with this name have only a field index, not a field name.
|
|
They are only allowed for indices < n_visible_fields. */
|
|
char *PyStructSequence_UnnamedField = "unnamed field";
|
|
|
|
#define VISIBLE_SIZE(op) Py_SIZE(op)
|
|
#define VISIBLE_SIZE_TP(tp) PyInt_AsLong( \
|
|
PyDict_GetItemString((tp)->tp_dict, visible_length_key))
|
|
|
|
#define REAL_SIZE_TP(tp) PyInt_AsLong( \
|
|
PyDict_GetItemString((tp)->tp_dict, real_length_key))
|
|
#define REAL_SIZE(op) REAL_SIZE_TP(Py_TYPE(op))
|
|
|
|
#define UNNAMED_FIELDS_TP(tp) PyInt_AsLong( \
|
|
PyDict_GetItemString((tp)->tp_dict, unnamed_fields_key))
|
|
#define UNNAMED_FIELDS(op) UNNAMED_FIELDS_TP(Py_TYPE(op))
|
|
|
|
|
|
PyObject *
|
|
PyStructSequence_New(PyTypeObject *type)
|
|
{
|
|
PyStructSequence *obj;
|
|
|
|
obj = PyObject_New(PyStructSequence, type);
|
|
if (obj == NULL)
|
|
return NULL;
|
|
Py_SIZE(obj) = VISIBLE_SIZE_TP(type);
|
|
|
|
return (PyObject*) obj;
|
|
}
|
|
|
|
static void
|
|
structseq_dealloc(PyStructSequence *obj)
|
|
{
|
|
Py_ssize_t i, size;
|
|
|
|
size = REAL_SIZE(obj);
|
|
for (i = 0; i < size; ++i) {
|
|
Py_XDECREF(obj->ob_item[i]);
|
|
}
|
|
PyObject_Del(obj);
|
|
}
|
|
|
|
static Py_ssize_t
|
|
structseq_length(PyStructSequence *obj)
|
|
{
|
|
return VISIBLE_SIZE(obj);
|
|
}
|
|
|
|
static PyObject*
|
|
structseq_item(PyStructSequence *obj, Py_ssize_t i)
|
|
{
|
|
if (i < 0 || i >= VISIBLE_SIZE(obj)) {
|
|
PyErr_SetString(PyExc_IndexError, "tuple index out of range");
|
|
return NULL;
|
|
}
|
|
Py_INCREF(obj->ob_item[i]);
|
|
return obj->ob_item[i];
|
|
}
|
|
|
|
static PyObject*
|
|
structseq_slice(PyStructSequence *obj, Py_ssize_t low, Py_ssize_t high)
|
|
{
|
|
PyTupleObject *np;
|
|
Py_ssize_t i;
|
|
|
|
if (low < 0)
|
|
low = 0;
|
|
if (high > VISIBLE_SIZE(obj))
|
|
high = VISIBLE_SIZE(obj);
|
|
if (high < low)
|
|
high = low;
|
|
np = (PyTupleObject *)PyTuple_New(high-low);
|
|
if (np == NULL)
|
|
return NULL;
|
|
for(i = low; i < high; ++i) {
|
|
PyObject *v = obj->ob_item[i];
|
|
Py_INCREF(v);
|
|
PyTuple_SET_ITEM(np, i-low, v);
|
|
}
|
|
return (PyObject *) np;
|
|
}
|
|
|
|
static PyObject *
|
|
structseq_subscript(PyStructSequence *self, PyObject *item)
|
|
{
|
|
if (PyIndex_Check(item)) {
|
|
Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
|
|
if (i == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
|
|
if (i < 0)
|
|
i += VISIBLE_SIZE(self);
|
|
|
|
if (i < 0 || i >= VISIBLE_SIZE(self)) {
|
|
PyErr_SetString(PyExc_IndexError,
|
|
"tuple index out of range");
|
|
return NULL;
|
|
}
|
|
Py_INCREF(self->ob_item[i]);
|
|
return self->ob_item[i];
|
|
}
|
|
else if (PySlice_Check(item)) {
|
|
Py_ssize_t start, stop, step, slicelen, cur, i;
|
|
PyObject *result;
|
|
|
|
if (PySlice_GetIndicesEx((PySliceObject *)item,
|
|
VISIBLE_SIZE(self), &start, &stop,
|
|
&step, &slicelen) < 0) {
|
|
return NULL;
|
|
}
|
|
if (slicelen <= 0)
|
|
return PyTuple_New(0);
|
|
result = PyTuple_New(slicelen);
|
|
if (result == NULL)
|
|
return NULL;
|
|
for (cur = start, i = 0; i < slicelen;
|
|
cur += step, i++) {
|
|
PyObject *v = self->ob_item[cur];
|
|
Py_INCREF(v);
|
|
PyTuple_SET_ITEM(result, i, v);
|
|
}
|
|
return result;
|
|
}
|
|
else {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"structseq index must be integer");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static PyObject *
|
|
structseq_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
|
|
{
|
|
PyObject *arg = NULL;
|
|
PyObject *dict = NULL;
|
|
PyObject *ob;
|
|
PyStructSequence *res = NULL;
|
|
Py_ssize_t len, min_len, max_len, i, n_unnamed_fields;
|
|
static char *kwlist[] = {"sequence", "dict", 0};
|
|
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|O:structseq",
|
|
kwlist, &arg, &dict))
|
|
return NULL;
|
|
|
|
arg = PySequence_Fast(arg, "constructor requires a sequence");
|
|
|
|
if (!arg) {
|
|
return NULL;
|
|
}
|
|
|
|
if (dict && !PyDict_Check(dict)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%.500s() takes a dict as second arg, if any",
|
|
type->tp_name);
|
|
Py_DECREF(arg);
|
|
return NULL;
|
|
}
|
|
|
|
len = PySequence_Fast_GET_SIZE(arg);
|
|
min_len = VISIBLE_SIZE_TP(type);
|
|
max_len = REAL_SIZE_TP(type);
|
|
n_unnamed_fields = UNNAMED_FIELDS_TP(type);
|
|
|
|
if (min_len != max_len) {
|
|
if (len < min_len) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%.500s() takes an at least %zd-sequence (%zd-sequence given)",
|
|
type->tp_name, min_len, len);
|
|
Py_DECREF(arg);
|
|
return NULL;
|
|
}
|
|
|
|
if (len > max_len) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%.500s() takes an at most %zd-sequence (%zd-sequence given)",
|
|
type->tp_name, max_len, len);
|
|
Py_DECREF(arg);
|
|
return NULL;
|
|
}
|
|
}
|
|
else {
|
|
if (len != min_len) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%.500s() takes a %zd-sequence (%zd-sequence given)",
|
|
type->tp_name, min_len, len);
|
|
Py_DECREF(arg);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
res = (PyStructSequence*) PyStructSequence_New(type);
|
|
if (res == NULL) {
|
|
Py_DECREF(arg);
|
|
return NULL;
|
|
}
|
|
for (i = 0; i < len; ++i) {
|
|
PyObject *v = PySequence_Fast_GET_ITEM(arg, i);
|
|
Py_INCREF(v);
|
|
res->ob_item[i] = v;
|
|
}
|
|
for (; i < max_len; ++i) {
|
|
if (dict && (ob = PyDict_GetItemString(
|
|
dict, type->tp_members[i-n_unnamed_fields].name))) {
|
|
}
|
|
else {
|
|
ob = Py_None;
|
|
}
|
|
Py_INCREF(ob);
|
|
res->ob_item[i] = ob;
|
|
}
|
|
|
|
Py_DECREF(arg);
|
|
return (PyObject*) res;
|
|
}
|
|
|
|
static PyObject *
|
|
make_tuple(PyStructSequence *obj)
|
|
{
|
|
return structseq_slice(obj, 0, VISIBLE_SIZE(obj));
|
|
}
|
|
|
|
static PyObject *
|
|
structseq_repr(PyStructSequence *obj)
|
|
{
|
|
/* buffer and type size were chosen well considered. */
|
|
#define REPR_BUFFER_SIZE 512
|
|
#define TYPE_MAXSIZE 100
|
|
|
|
PyObject *tup;
|
|
PyTypeObject *typ = Py_TYPE(obj);
|
|
int i, removelast = 0;
|
|
Py_ssize_t len;
|
|
char buf[REPR_BUFFER_SIZE];
|
|
char *endofbuf, *pbuf = buf;
|
|
|
|
/* pointer to end of writeable buffer; safes space for "...)\0" */
|
|
endofbuf= &buf[REPR_BUFFER_SIZE-5];
|
|
|
|
if ((tup = make_tuple(obj)) == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
/* "typename(", limited to TYPE_MAXSIZE */
|
|
len = strlen(typ->tp_name) > TYPE_MAXSIZE ? TYPE_MAXSIZE :
|
|
strlen(typ->tp_name);
|
|
strncpy(pbuf, typ->tp_name, len);
|
|
pbuf += len;
|
|
*pbuf++ = '(';
|
|
|
|
for (i=0; i < VISIBLE_SIZE(obj); i++) {
|
|
PyObject *val, *repr;
|
|
char *cname, *crepr;
|
|
|
|
cname = typ->tp_members[i].name;
|
|
|
|
val = PyTuple_GetItem(tup, i);
|
|
if (cname == NULL || val == NULL) {
|
|
return NULL;
|
|
}
|
|
repr = PyObject_Repr(val);
|
|
if (repr == NULL) {
|
|
Py_DECREF(tup);
|
|
return NULL;
|
|
}
|
|
crepr = PyString_AsString(repr);
|
|
if (crepr == NULL) {
|
|
Py_DECREF(tup);
|
|
Py_DECREF(repr);
|
|
return NULL;
|
|
}
|
|
|
|
/* + 3: keep space for "=" and ", " */
|
|
len = strlen(cname) + strlen(crepr) + 3;
|
|
if ((pbuf+len) <= endofbuf) {
|
|
strcpy(pbuf, cname);
|
|
pbuf += strlen(cname);
|
|
*pbuf++ = '=';
|
|
strcpy(pbuf, crepr);
|
|
pbuf += strlen(crepr);
|
|
*pbuf++ = ',';
|
|
*pbuf++ = ' ';
|
|
removelast = 1;
|
|
Py_DECREF(repr);
|
|
}
|
|
else {
|
|
strcpy(pbuf, "...");
|
|
pbuf += 3;
|
|
removelast = 0;
|
|
Py_DECREF(repr);
|
|
break;
|
|
}
|
|
}
|
|
Py_DECREF(tup);
|
|
if (removelast) {
|
|
/* overwrite last ", " */
|
|
pbuf-=2;
|
|
}
|
|
*pbuf++ = ')';
|
|
*pbuf = '\0';
|
|
|
|
return PyString_FromString(buf);
|
|
}
|
|
|
|
static PyObject *
|
|
structseq_concat(PyStructSequence *obj, PyObject *b)
|
|
{
|
|
PyObject *tup, *result;
|
|
tup = make_tuple(obj);
|
|
result = PySequence_Concat(tup, b);
|
|
Py_DECREF(tup);
|
|
return result;
|
|
}
|
|
|
|
static PyObject *
|
|
structseq_repeat(PyStructSequence *obj, Py_ssize_t n)
|
|
{
|
|
PyObject *tup, *result;
|
|
tup = make_tuple(obj);
|
|
result = PySequence_Repeat(tup, n);
|
|
Py_DECREF(tup);
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
structseq_contains(PyStructSequence *obj, PyObject *o)
|
|
{
|
|
PyObject *tup;
|
|
int result;
|
|
tup = make_tuple(obj);
|
|
if (!tup)
|
|
return -1;
|
|
result = PySequence_Contains(tup, o);
|
|
Py_DECREF(tup);
|
|
return result;
|
|
}
|
|
|
|
static long
|
|
structseq_hash(PyObject *obj)
|
|
{
|
|
PyObject *tup;
|
|
long result;
|
|
tup = make_tuple((PyStructSequence*) obj);
|
|
if (!tup)
|
|
return -1;
|
|
result = PyObject_Hash(tup);
|
|
Py_DECREF(tup);
|
|
return result;
|
|
}
|
|
|
|
static PyObject *
|
|
structseq_richcompare(PyObject *obj, PyObject *o2, int op)
|
|
{
|
|
PyObject *tup, *result;
|
|
tup = make_tuple((PyStructSequence*) obj);
|
|
result = PyObject_RichCompare(tup, o2, op);
|
|
Py_DECREF(tup);
|
|
return result;
|
|
}
|
|
|
|
static PyObject *
|
|
structseq_reduce(PyStructSequence* self)
|
|
{
|
|
PyObject* tup;
|
|
PyObject* dict;
|
|
PyObject* result;
|
|
Py_ssize_t n_fields, n_visible_fields, n_unnamed_fields;
|
|
int i;
|
|
|
|
n_fields = REAL_SIZE(self);
|
|
n_visible_fields = VISIBLE_SIZE(self);
|
|
n_unnamed_fields = UNNAMED_FIELDS(self);
|
|
tup = PyTuple_New(n_visible_fields);
|
|
if (!tup) {
|
|
return NULL;
|
|
}
|
|
|
|
dict = PyDict_New();
|
|
if (!dict) {
|
|
Py_DECREF(tup);
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0; i < n_visible_fields; i++) {
|
|
Py_INCREF(self->ob_item[i]);
|
|
PyTuple_SET_ITEM(tup, i, self->ob_item[i]);
|
|
}
|
|
|
|
for (; i < n_fields; i++) {
|
|
char *n = Py_TYPE(self)->tp_members[i-n_unnamed_fields].name;
|
|
PyDict_SetItemString(dict, n,
|
|
self->ob_item[i]);
|
|
}
|
|
|
|
result = Py_BuildValue("(O(OO))", Py_TYPE(self), tup, dict);
|
|
|
|
Py_DECREF(tup);
|
|
Py_DECREF(dict);
|
|
|
|
return result;
|
|
}
|
|
|
|
static PySequenceMethods structseq_as_sequence = {
|
|
(lenfunc)structseq_length,
|
|
(binaryfunc)structseq_concat, /* sq_concat */
|
|
(ssizeargfunc)structseq_repeat, /* sq_repeat */
|
|
(ssizeargfunc)structseq_item, /* sq_item */
|
|
(ssizessizeargfunc)structseq_slice, /* sq_slice */
|
|
0, /* sq_ass_item */
|
|
0, /* sq_ass_slice */
|
|
(objobjproc)structseq_contains, /* sq_contains */
|
|
};
|
|
|
|
static PyMappingMethods structseq_as_mapping = {
|
|
(lenfunc)structseq_length,
|
|
(binaryfunc)structseq_subscript,
|
|
};
|
|
|
|
static PyMethodDef structseq_methods[] = {
|
|
{"__reduce__", (PyCFunction)structseq_reduce,
|
|
METH_NOARGS, NULL},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
static PyTypeObject _struct_sequence_template = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
NULL, /* tp_name */
|
|
0, /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
(destructor)structseq_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_compare */
|
|
(reprfunc)structseq_repr, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
&structseq_as_sequence, /* tp_as_sequence */
|
|
&structseq_as_mapping, /* tp_as_mapping */
|
|
structseq_hash, /* tp_hash */
|
|
0, /* tp_call */
|
|
0, /* tp_str */
|
|
0, /* tp_getattro */
|
|
0, /* tp_setattro */
|
|
0, /* tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT, /* tp_flags */
|
|
NULL, /* tp_doc */
|
|
0, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
structseq_richcompare, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
0, /* tp_iter */
|
|
0, /* tp_iternext */
|
|
structseq_methods, /* tp_methods */
|
|
NULL, /* tp_members */
|
|
0, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
0, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
0, /* tp_dictoffset */
|
|
0, /* tp_init */
|
|
0, /* tp_alloc */
|
|
structseq_new, /* tp_new */
|
|
};
|
|
|
|
void
|
|
PyStructSequence_InitType(PyTypeObject *type, PyStructSequence_Desc *desc)
|
|
{
|
|
PyObject *dict;
|
|
PyMemberDef* members;
|
|
int n_members, n_unnamed_members, i, k;
|
|
|
|
#ifdef Py_TRACE_REFS
|
|
/* if the type object was chained, unchain it first
|
|
before overwriting its storage */
|
|
if (type->_ob_next) {
|
|
_Py_ForgetReference((PyObject*)type);
|
|
}
|
|
#endif
|
|
|
|
n_unnamed_members = 0;
|
|
for (i = 0; desc->fields[i].name != NULL; ++i)
|
|
if (desc->fields[i].name == PyStructSequence_UnnamedField)
|
|
n_unnamed_members++;
|
|
n_members = i;
|
|
|
|
memcpy(type, &_struct_sequence_template, sizeof(PyTypeObject));
|
|
type->tp_name = desc->name;
|
|
type->tp_doc = desc->doc;
|
|
type->tp_basicsize = sizeof(PyStructSequence)+
|
|
sizeof(PyObject*)*(n_members-1);
|
|
type->tp_itemsize = 0;
|
|
|
|
members = PyMem_NEW(PyMemberDef, n_members-n_unnamed_members+1);
|
|
if (members == NULL)
|
|
return;
|
|
|
|
for (i = k = 0; i < n_members; ++i) {
|
|
if (desc->fields[i].name == PyStructSequence_UnnamedField)
|
|
continue;
|
|
members[k].name = desc->fields[i].name;
|
|
members[k].type = T_OBJECT;
|
|
members[k].offset = offsetof(PyStructSequence, ob_item)
|
|
+ i * sizeof(PyObject*);
|
|
members[k].flags = READONLY;
|
|
members[k].doc = desc->fields[i].doc;
|
|
k++;
|
|
}
|
|
members[k].name = NULL;
|
|
|
|
type->tp_members = members;
|
|
|
|
if (PyType_Ready(type) < 0)
|
|
return;
|
|
Py_INCREF(type);
|
|
|
|
dict = type->tp_dict;
|
|
#define SET_DICT_FROM_INT(key, value) \
|
|
do { \
|
|
PyObject *v = PyInt_FromLong((long) value); \
|
|
if (v != NULL) { \
|
|
PyDict_SetItemString(dict, key, v); \
|
|
Py_DECREF(v); \
|
|
} \
|
|
} while (0)
|
|
|
|
SET_DICT_FROM_INT(visible_length_key, desc->n_in_sequence);
|
|
SET_DICT_FROM_INT(real_length_key, n_members);
|
|
SET_DICT_FROM_INT(unnamed_fields_key, n_unnamed_members);
|
|
}
|