diff options
Diffstat (limited to 'AppPkg/Applications/Python/Python-2.7.2/Objects/object.c')
| -rw-r--r-- | AppPkg/Applications/Python/Python-2.7.2/Objects/object.c | 2455 |
1 files changed, 2455 insertions, 0 deletions
diff --git a/AppPkg/Applications/Python/Python-2.7.2/Objects/object.c b/AppPkg/Applications/Python/Python-2.7.2/Objects/object.c new file mode 100644 index 0000000000..2fd38437c6 --- /dev/null +++ b/AppPkg/Applications/Python/Python-2.7.2/Objects/object.c @@ -0,0 +1,2455 @@ +
+/* Generic object operations; and implementation of None (NoObject) */
+
+#include "Python.h"
+#include "frameobject.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef Py_REF_DEBUG
+Py_ssize_t _Py_RefTotal;
+
+Py_ssize_t
+_Py_GetRefTotal(void)
+{
+ PyObject *o;
+ Py_ssize_t total = _Py_RefTotal;
+ /* ignore the references to the dummy object of the dicts and sets
+ because they are not reliable and not useful (now that the
+ hash table code is well-tested) */
+ o = _PyDict_Dummy();
+ if (o != NULL)
+ total -= o->ob_refcnt;
+ o = _PySet_Dummy();
+ if (o != NULL)
+ total -= o->ob_refcnt;
+ return total;
+}
+#endif /* Py_REF_DEBUG */
+
+int Py_DivisionWarningFlag;
+int Py_Py3kWarningFlag;
+
+/* Object allocation routines used by NEWOBJ and NEWVAROBJ macros.
+ These are used by the individual routines for object creation.
+ Do not call them otherwise, they do not initialize the object! */
+
+#ifdef Py_TRACE_REFS
+/* Head of circular doubly-linked list of all objects. These are linked
+ * together via the _ob_prev and _ob_next members of a PyObject, which
+ * exist only in a Py_TRACE_REFS build.
+ */
+static PyObject refchain = {&refchain, &refchain};
+
+/* Insert op at the front of the list of all objects. If force is true,
+ * op is added even if _ob_prev and _ob_next are non-NULL already. If
+ * force is false amd _ob_prev or _ob_next are non-NULL, do nothing.
+ * force should be true if and only if op points to freshly allocated,
+ * uninitialized memory, or you've unlinked op from the list and are
+ * relinking it into the front.
+ * Note that objects are normally added to the list via _Py_NewReference,
+ * which is called by PyObject_Init. Not all objects are initialized that
+ * way, though; exceptions include statically allocated type objects, and
+ * statically allocated singletons (like Py_True and Py_None).
+ */
+void
+_Py_AddToAllObjects(PyObject *op, int force)
+{
+#ifdef Py_DEBUG
+ if (!force) {
+ /* If it's initialized memory, op must be in or out of
+ * the list unambiguously.
+ */
+ assert((op->_ob_prev == NULL) == (op->_ob_next == NULL));
+ }
+#endif
+ if (force || op->_ob_prev == NULL) {
+ op->_ob_next = refchain._ob_next;
+ op->_ob_prev = &refchain;
+ refchain._ob_next->_ob_prev = op;
+ refchain._ob_next = op;
+ }
+}
+#endif /* Py_TRACE_REFS */
+
+#ifdef COUNT_ALLOCS
+static PyTypeObject *type_list;
+/* All types are added to type_list, at least when
+ they get one object created. That makes them
+ immortal, which unfortunately contributes to
+ garbage itself. If unlist_types_without_objects
+ is set, they will be removed from the type_list
+ once the last object is deallocated. */
+static int unlist_types_without_objects;
+extern Py_ssize_t tuple_zero_allocs, fast_tuple_allocs;
+extern Py_ssize_t quick_int_allocs, quick_neg_int_allocs;
+extern Py_ssize_t null_strings, one_strings;
+void
+dump_counts(FILE* f)
+{
+ PyTypeObject *tp;
+
+ for (tp = type_list; tp; tp = tp->tp_next)
+ fprintf(f, "%s alloc'd: %" PY_FORMAT_SIZE_T "d, "
+ "freed: %" PY_FORMAT_SIZE_T "d, "
+ "max in use: %" PY_FORMAT_SIZE_T "d\n",
+ tp->tp_name, tp->tp_allocs, tp->tp_frees,
+ tp->tp_maxalloc);
+ fprintf(f, "fast tuple allocs: %" PY_FORMAT_SIZE_T "d, "
+ "empty: %" PY_FORMAT_SIZE_T "d\n",
+ fast_tuple_allocs, tuple_zero_allocs);
+ fprintf(f, "fast int allocs: pos: %" PY_FORMAT_SIZE_T "d, "
+ "neg: %" PY_FORMAT_SIZE_T "d\n",
+ quick_int_allocs, quick_neg_int_allocs);
+ fprintf(f, "null strings: %" PY_FORMAT_SIZE_T "d, "
+ "1-strings: %" PY_FORMAT_SIZE_T "d\n",
+ null_strings, one_strings);
+}
+
+PyObject *
+get_counts(void)
+{
+ PyTypeObject *tp;
+ PyObject *result;
+ PyObject *v;
+
+ result = PyList_New(0);
+ if (result == NULL)
+ return NULL;
+ for (tp = type_list; tp; tp = tp->tp_next) {
+ v = Py_BuildValue("(snnn)", tp->tp_name, tp->tp_allocs,
+ tp->tp_frees, tp->tp_maxalloc);
+ if (v == NULL) {
+ Py_DECREF(result);
+ return NULL;
+ }
+ if (PyList_Append(result, v) < 0) {
+ Py_DECREF(v);
+ Py_DECREF(result);
+ return NULL;
+ }
+ Py_DECREF(v);
+ }
+ return result;
+}
+
+void
+inc_count(PyTypeObject *tp)
+{
+ if (tp->tp_next == NULL && tp->tp_prev == NULL) {
+ /* first time; insert in linked list */
+ if (tp->tp_next != NULL) /* sanity check */
+ Py_FatalError("XXX inc_count sanity check");
+ if (type_list)
+ type_list->tp_prev = tp;
+ tp->tp_next = type_list;
+ /* Note that as of Python 2.2, heap-allocated type objects
+ * can go away, but this code requires that they stay alive
+ * until program exit. That's why we're careful with
+ * refcounts here. type_list gets a new reference to tp,
+ * while ownership of the reference type_list used to hold
+ * (if any) was transferred to tp->tp_next in the line above.
+ * tp is thus effectively immortal after this.
+ */
+ Py_INCREF(tp);
+ type_list = tp;
+#ifdef Py_TRACE_REFS
+ /* Also insert in the doubly-linked list of all objects,
+ * if not already there.
+ */
+ _Py_AddToAllObjects((PyObject *)tp, 0);
+#endif
+ }
+ tp->tp_allocs++;
+ if (tp->tp_allocs - tp->tp_frees > tp->tp_maxalloc)
+ tp->tp_maxalloc = tp->tp_allocs - tp->tp_frees;
+}
+
+void dec_count(PyTypeObject *tp)
+{
+ tp->tp_frees++;
+ if (unlist_types_without_objects &&
+ tp->tp_allocs == tp->tp_frees) {
+ /* unlink the type from type_list */
+ if (tp->tp_prev)
+ tp->tp_prev->tp_next = tp->tp_next;
+ else
+ type_list = tp->tp_next;
+ if (tp->tp_next)
+ tp->tp_next->tp_prev = tp->tp_prev;
+ tp->tp_next = tp->tp_prev = NULL;
+ Py_DECREF(tp);
+ }
+}
+
+#endif
+
+#ifdef Py_REF_DEBUG
+/* Log a fatal error; doesn't return. */
+void
+_Py_NegativeRefcount(const char *fname, int lineno, PyObject *op)
+{
+ char buf[300];
+
+ PyOS_snprintf(buf, sizeof(buf),
+ "%s:%i object at %p has negative ref count "
+ "%" PY_FORMAT_SIZE_T "d",
+ fname, lineno, op, op->ob_refcnt);
+ Py_FatalError(buf);
+}
+
+#endif /* Py_REF_DEBUG */
+
+void
+Py_IncRef(PyObject *o)
+{
+ Py_XINCREF(o);
+}
+
+void
+Py_DecRef(PyObject *o)
+{
+ Py_XDECREF(o);
+}
+
+PyObject *
+PyObject_Init(PyObject *op, PyTypeObject *tp)
+{
+ if (op == NULL)
+ return PyErr_NoMemory();
+ /* Any changes should be reflected in PyObject_INIT (objimpl.h) */
+ Py_TYPE(op) = tp;
+ _Py_NewReference(op);
+ return op;
+}
+
+PyVarObject *
+PyObject_InitVar(PyVarObject *op, PyTypeObject *tp, Py_ssize_t size)
+{
+ if (op == NULL)
+ return (PyVarObject *) PyErr_NoMemory();
+ /* Any changes should be reflected in PyObject_INIT_VAR */
+ op->ob_size = size;
+ Py_TYPE(op) = tp;
+ _Py_NewReference((PyObject *)op);
+ return op;
+}
+
+PyObject *
+_PyObject_New(PyTypeObject *tp)
+{
+ PyObject *op;
+ op = (PyObject *) PyObject_MALLOC(_PyObject_SIZE(tp));
+ if (op == NULL)
+ return PyErr_NoMemory();
+ return PyObject_INIT(op, tp);
+}
+
+PyVarObject *
+_PyObject_NewVar(PyTypeObject *tp, Py_ssize_t nitems)
+{
+ PyVarObject *op;
+ const size_t size = _PyObject_VAR_SIZE(tp, nitems);
+ op = (PyVarObject *) PyObject_MALLOC(size);
+ if (op == NULL)
+ return (PyVarObject *)PyErr_NoMemory();
+ return PyObject_INIT_VAR(op, tp, nitems);
+}
+
+/* for binary compatibility with 2.2 */
+#undef _PyObject_Del
+void
+_PyObject_Del(PyObject *op)
+{
+ PyObject_FREE(op);
+}
+
+/* Implementation of PyObject_Print with recursion checking */
+static int
+internal_print(PyObject *op, FILE *fp, int flags, int nesting)
+{
+ int ret = 0;
+ if (nesting > 10) {
+ PyErr_SetString(PyExc_RuntimeError, "print recursion");
+ return -1;
+ }
+ if (PyErr_CheckSignals())
+ return -1;
+#ifdef USE_STACKCHECK
+ if (PyOS_CheckStack()) {
+ PyErr_SetString(PyExc_MemoryError, "stack overflow");
+ return -1;
+ }
+#endif
+ clearerr(fp); /* Clear any previous error condition */
+ if (op == NULL) {
+ Py_BEGIN_ALLOW_THREADS
+ fprintf(fp, "<nil>");
+ Py_END_ALLOW_THREADS
+ }
+ else {
+ if (op->ob_refcnt <= 0)
+ /* XXX(twouters) cast refcount to long until %zd is
+ universally available */
+ Py_BEGIN_ALLOW_THREADS
+ fprintf(fp, "<refcnt %ld at %p>",
+ (long)op->ob_refcnt, op);
+ Py_END_ALLOW_THREADS
+ else if (Py_TYPE(op)->tp_print == NULL) {
+ PyObject *s;
+ if (flags & Py_PRINT_RAW)
+ s = PyObject_Str(op);
+ else
+ s = PyObject_Repr(op);
+ if (s == NULL)
+ ret = -1;
+ else {
+ ret = internal_print(s, fp, Py_PRINT_RAW,
+ nesting+1);
+ }
+ Py_XDECREF(s);
+ }
+ else
+ ret = (*Py_TYPE(op)->tp_print)(op, fp, flags);
+ }
+ if (ret == 0) {
+ if (ferror(fp)) {
+ PyErr_SetFromErrno(PyExc_IOError);
+ clearerr(fp);
+ ret = -1;
+ }
+ }
+ return ret;
+}
+
+int
+PyObject_Print(PyObject *op, FILE *fp, int flags)
+{
+ return internal_print(op, fp, flags, 0);
+}
+
+
+/* For debugging convenience. See Misc/gdbinit for some useful gdb hooks */
+void _PyObject_Dump(PyObject* op)
+{
+ if (op == NULL)
+ fprintf(stderr, "NULL\n");
+ else {
+#ifdef WITH_THREAD
+ PyGILState_STATE gil;
+#endif
+ fprintf(stderr, "object : ");
+#ifdef WITH_THREAD
+ gil = PyGILState_Ensure();
+#endif
+ (void)PyObject_Print(op, stderr, 0);
+#ifdef WITH_THREAD
+ PyGILState_Release(gil);
+#endif
+ /* XXX(twouters) cast refcount to long until %zd is
+ universally available */
+ fprintf(stderr, "\n"
+ "type : %s\n"
+ "refcount: %ld\n"
+ "address : %p\n",
+ Py_TYPE(op)==NULL ? "NULL" : Py_TYPE(op)->tp_name,
+ (long)op->ob_refcnt,
+ op);
+ }
+}
+
+PyObject *
+PyObject_Repr(PyObject *v)
+{
+ if (PyErr_CheckSignals())
+ return NULL;
+#ifdef USE_STACKCHECK
+ if (PyOS_CheckStack()) {
+ PyErr_SetString(PyExc_MemoryError, "stack overflow");
+ return NULL;
+ }
+#endif
+ if (v == NULL)
+ return PyString_FromString("<NULL>");
+ else if (Py_TYPE(v)->tp_repr == NULL)
+ return PyString_FromFormat("<%s object at %p>",
+ Py_TYPE(v)->tp_name, v);
+ else {
+ PyObject *res;
+ res = (*Py_TYPE(v)->tp_repr)(v);
+ if (res == NULL)
+ return NULL;
+#ifdef Py_USING_UNICODE
+ if (PyUnicode_Check(res)) {
+ PyObject* str;
+ str = PyUnicode_AsEncodedString(res, NULL, NULL);
+ Py_DECREF(res);
+ if (str)
+ res = str;
+ else
+ return NULL;
+ }
+#endif
+ if (!PyString_Check(res)) {
+ PyErr_Format(PyExc_TypeError,
+ "__repr__ returned non-string (type %.200s)",
+ Py_TYPE(res)->tp_name);
+ Py_DECREF(res);
+ return NULL;
+ }
+ return res;
+ }
+}
+
+PyObject *
+_PyObject_Str(PyObject *v)
+{
+ PyObject *res;
+ int type_ok;
+ if (v == NULL)
+ return PyString_FromString("<NULL>");
+ if (PyString_CheckExact(v)) {
+ Py_INCREF(v);
+ return v;
+ }
+#ifdef Py_USING_UNICODE
+ if (PyUnicode_CheckExact(v)) {
+ Py_INCREF(v);
+ return v;
+ }
+#endif
+ if (Py_TYPE(v)->tp_str == NULL)
+ return PyObject_Repr(v);
+
+ /* It is possible for a type to have a tp_str representation that loops
+ infinitely. */
+ if (Py_EnterRecursiveCall(" while getting the str of an object"))
+ return NULL;
+ res = (*Py_TYPE(v)->tp_str)(v);
+ Py_LeaveRecursiveCall();
+ if (res == NULL)
+ return NULL;
+ type_ok = PyString_Check(res);
+#ifdef Py_USING_UNICODE
+ type_ok = type_ok || PyUnicode_Check(res);
+#endif
+ if (!type_ok) {
+ PyErr_Format(PyExc_TypeError,
+ "__str__ returned non-string (type %.200s)",
+ Py_TYPE(res)->tp_name);
+ Py_DECREF(res);
+ return NULL;
+ }
+ return res;
+}
+
+PyObject *
+PyObject_Str(PyObject *v)
+{
+ PyObject *res = _PyObject_Str(v);
+ if (res == NULL)
+ return NULL;
+#ifdef Py_USING_UNICODE
+ if (PyUnicode_Check(res)) {
+ PyObject* str;
+ str = PyUnicode_AsEncodedString(res, NULL, NULL);
+ Py_DECREF(res);
+ if (str)
+ res = str;
+ else
+ return NULL;
+ }
+#endif
+ assert(PyString_Check(res));
+ return res;
+}
+
+#ifdef Py_USING_UNICODE
+PyObject *
+PyObject_Unicode(PyObject *v)
+{
+ PyObject *res;
+ PyObject *func;
+ PyObject *str;
+ int unicode_method_found = 0;
+ static PyObject *unicodestr;
+
+ if (v == NULL) {
+ res = PyString_FromString("<NULL>");
+ if (res == NULL)
+ return NULL;
+ str = PyUnicode_FromEncodedObject(res, NULL, "strict");
+ Py_DECREF(res);
+ return str;
+ } else if (PyUnicode_CheckExact(v)) {
+ Py_INCREF(v);
+ return v;
+ }
+
+ if (PyInstance_Check(v)) {
+ /* We're an instance of a classic class */
+ /* Try __unicode__ from the instance -- alas we have no type */
+ func = PyObject_GetAttr(v, unicodestr);
+ if (func != NULL) {
+ unicode_method_found = 1;
+ res = PyObject_CallFunctionObjArgs(func, NULL);
+ Py_DECREF(func);
+ }
+ else {
+ PyErr_Clear();
+ }
+ }
+ else {
+ /* Not a classic class instance, try __unicode__. */
+ func = _PyObject_LookupSpecial(v, "__unicode__", &unicodestr);
+ if (func != NULL) {
+ unicode_method_found = 1;
+ res = PyObject_CallFunctionObjArgs(func, NULL);
+ Py_DECREF(func);
+ }
+ else if (PyErr_Occurred())
+ return NULL;
+ }
+
+ /* Didn't find __unicode__ */
+ if (!unicode_method_found) {
+ if (PyUnicode_Check(v)) {
+ /* For a Unicode subtype that's didn't overwrite __unicode__,
+ return a true Unicode object with the same data. */
+ return PyUnicode_FromUnicode(PyUnicode_AS_UNICODE(v),
+ PyUnicode_GET_SIZE(v));
+ }
+ if (PyString_CheckExact(v)) {
+ Py_INCREF(v);
+ res = v;
+ }
+ else {
+ if (Py_TYPE(v)->tp_str != NULL)
+ res = (*Py_TYPE(v)->tp_str)(v);
+ else
+ res = PyObject_Repr(v);
+ }
+ }
+
+ if (res == NULL)
+ return NULL;
+ if (!PyUnicode_Check(res)) {
+ str = PyUnicode_FromEncodedObject(res, NULL, "strict");
+ Py_DECREF(res);
+ res = str;
+ }
+ return res;
+}
+#endif
+
+
+/* Helper to warn about deprecated tp_compare return values. Return:
+ -2 for an exception;
+ -1 if v < w;
+ 0 if v == w;
+ 1 if v > w.
+ (This function cannot return 2.)
+*/
+static int
+adjust_tp_compare(int c)
+{
+ if (PyErr_Occurred()) {
+ if (c != -1 && c != -2) {
+ PyObject *t, *v, *tb;
+ PyErr_Fetch(&t, &v, &tb);
+ if (PyErr_Warn(PyExc_RuntimeWarning,
+ "tp_compare didn't return -1 or -2 "
+ "for exception") < 0) {
+ Py_XDECREF(t);
+ Py_XDECREF(v);
+ Py_XDECREF(tb);
+ }
+ else
+ PyErr_Restore(t, v, tb);
+ }
+ return -2;
+ }
+ else if (c < -1 || c > 1) {
+ if (PyErr_Warn(PyExc_RuntimeWarning,
+ "tp_compare didn't return -1, 0 or 1") < 0)
+ return -2;
+ else
+ return c < -1 ? -1 : 1;
+ }
+ else {
+ assert(c >= -1 && c <= 1);
+ return c;
+ }
+}
+
+
+/* Macro to get the tp_richcompare field of a type if defined */
+#define RICHCOMPARE(t) (PyType_HasFeature((t), Py_TPFLAGS_HAVE_RICHCOMPARE) \
+ ? (t)->tp_richcompare : NULL)
+
+/* Map rich comparison operators to their swapped version, e.g. LT --> GT */
+int _Py_SwappedOp[] = {Py_GT, Py_GE, Py_EQ, Py_NE, Py_LT, Py_LE};
+
+/* Try a genuine rich comparison, returning an object. Return:
+ NULL for exception;
+ NotImplemented if this particular rich comparison is not implemented or
+ undefined;
+ some object not equal to NotImplemented if it is implemented
+ (this latter object may not be a Boolean).
+*/
+static PyObject *
+try_rich_compare(PyObject *v, PyObject *w, int op)
+{
+ richcmpfunc f;
+ PyObject *res;
+
+ if (v->ob_type != w->ob_type &&
+ PyType_IsSubtype(w->ob_type, v->ob_type) &&
+ (f = RICHCOMPARE(w->ob_type)) != NULL) {
+ res = (*f)(w, v, _Py_SwappedOp[op]);
+ if (res != Py_NotImplemented)
+ return res;
+ Py_DECREF(res);
+ }
+ if ((f = RICHCOMPARE(v->ob_type)) != NULL) {
+ res = (*f)(v, w, op);
+ if (res != Py_NotImplemented)
+ return res;
+ Py_DECREF(res);
+ }
+ if ((f = RICHCOMPARE(w->ob_type)) != NULL) {
+ return (*f)(w, v, _Py_SwappedOp[op]);
+ }
+ res = Py_NotImplemented;
+ Py_INCREF(res);
+ return res;
+}
+
+/* Try a genuine rich comparison, returning an int. Return:
+ -1 for exception (including the case where try_rich_compare() returns an
+ object that's not a Boolean);
+ 0 if the outcome is false;
+ 1 if the outcome is true;
+ 2 if this particular rich comparison is not implemented or undefined.
+*/
+static int
+try_rich_compare_bool(PyObject *v, PyObject *w, int op)
+{
+ PyObject *res;
+ int ok;
+
+ if (RICHCOMPARE(v->ob_type) == NULL && RICHCOMPARE(w->ob_type) == NULL)
+ return 2; /* Shortcut, avoid INCREF+DECREF */
+ res = try_rich_compare(v, w, op);
+ if (res == NULL)
+ return -1;
+ if (res == Py_NotImplemented) {
+ Py_DECREF(res);
+ return 2;
+ }
+ ok = PyObject_IsTrue(res);
+ Py_DECREF(res);
+ return ok;
+}
+
+/* Try rich comparisons to determine a 3-way comparison. Return:
+ -2 for an exception;
+ -1 if v < w;
+ 0 if v == w;
+ 1 if v > w;
+ 2 if this particular rich comparison is not implemented or undefined.
+*/
+static int
+try_rich_to_3way_compare(PyObject *v, PyObject *w)
+{
+ static struct { int op; int outcome; } tries[3] = {
+ /* Try this operator, and if it is true, use this outcome: */
+ {Py_EQ, 0},
+ {Py_LT, -1},
+ {Py_GT, 1},
+ };
+ int i;
+
+ if (RICHCOMPARE(v->ob_type) == NULL && RICHCOMPARE(w->ob_type) == NULL)
+ return 2; /* Shortcut */
+
+ for (i = 0; i < 3; i++) {
+ switch (try_rich_compare_bool(v, w, tries[i].op)) {
+ case -1:
+ return -2;
+ case 1:
+ return tries[i].outcome;
+ }
+ }
+
+ return 2;
+}
+
+/* Try a 3-way comparison, returning an int. Return:
+ -2 for an exception;
+ -1 if v < w;
+ 0 if v == w;
+ 1 if v > w;
+ 2 if this particular 3-way comparison is not implemented or undefined.
+*/
+static int
+try_3way_compare(PyObject *v, PyObject *w)
+{
+ int c;
+ cmpfunc f;
+
+ /* Comparisons involving instances are given to instance_compare,
+ which has the same return conventions as this function. */
+
+ f = v->ob_type->tp_compare;
+ if (PyInstance_Check(v))
+ return (*f)(v, w);
+ if (PyInstance_Check(w))
+ return (*w->ob_type->tp_compare)(v, w);
+
+ /* If both have the same (non-NULL) tp_compare, use it. */
+ if (f != NULL && f == w->ob_type->tp_compare) {
+ c = (*f)(v, w);
+ return adjust_tp_compare(c);
+ }
+
+ /* If either tp_compare is _PyObject_SlotCompare, that's safe. */
+ if (f == _PyObject_SlotCompare ||
+ w->ob_type->tp_compare == _PyObject_SlotCompare)
+ return _PyObject_SlotCompare(v, w);
+
+ /* If we're here, v and w,
+ a) are not instances;
+ b) have different types or a type without tp_compare; and
+ c) don't have a user-defined tp_compare.
+ tp_compare implementations in C assume that both arguments
+ have their type, so we give up if the coercion fails or if
+ it yields types which are still incompatible (which can
+ happen with a user-defined nb_coerce).
+ */
+ c = PyNumber_CoerceEx(&v, &w);
+ if (c < 0)
+ return -2;
+ if (c > 0)
+ return 2;
+ f = v->ob_type->tp_compare;
+ if (f != NULL && f == w->ob_type->tp_compare) {
+ c = (*f)(v, w);
+ Py_DECREF(v);
+ Py_DECREF(w);
+ return adjust_tp_compare(c);
+ }
+
+ /* No comparison defined */
+ Py_DECREF(v);
+ Py_DECREF(w);
+ return 2;
+}
+
+/* Final fallback 3-way comparison, returning an int. Return:
+ -2 if an error occurred;
+ -1 if v < w;
+ 0 if v == w;
+ 1 if v > w.
+*/
+static int
+default_3way_compare(PyObject *v, PyObject *w)
+{
+ int c;
+ const char *vname, *wname;
+
+ if (v->ob_type == w->ob_type) {
+ /* When comparing these pointers, they must be cast to
+ * integer types (i.e. Py_uintptr_t, our spelling of C9X's
+ * uintptr_t). ANSI specifies that pointer compares other
+ * than == and != to non-related structures are undefined.
+ */
+ Py_uintptr_t vv = (Py_uintptr_t)v;
+ Py_uintptr_t ww = (Py_uintptr_t)w;
+ return (vv < ww) ? -1 : (vv > ww) ? 1 : 0;
+ }
+
+ /* None is smaller than anything */
+ if (v == Py_None)
+ return -1;
+ if (w == Py_None)
+ return 1;
+
+ /* different type: compare type names; numbers are smaller */
+ if (PyNumber_Check(v))
+ vname = "";
+ else
+ vname = v->ob_type->tp_name;
+ if (PyNumber_Check(w))
+ wname = "";
+ else
+ wname = w->ob_type->tp_name;
+ c = strcmp(vname, wname);
+ if (c < 0)
+ return -1;
+ if (c > 0)
+ return 1;
+ /* Same type name, or (more likely) incomparable numeric types */
+ return ((Py_uintptr_t)(v->ob_type) < (
+ Py_uintptr_t)(w->ob_type)) ? -1 : 1;
+}
+
+/* Do a 3-way comparison, by hook or by crook. Return:
+ -2 for an exception (but see below);
+ -1 if v < w;
+ 0 if v == w;
+ 1 if v > w;
+ BUT: if the object implements a tp_compare function, it returns
+ whatever this function returns (whether with an exception or not).
+*/
+static int
+do_cmp(PyObject *v, PyObject *w)
+{
+ int c;
+ cmpfunc f;
+
+ if (v->ob_type == w->ob_type
+ && (f = v->ob_type->tp_compare) != NULL) {
+ c = (*f)(v, w);
+ if (PyInstance_Check(v)) {
+ /* Instance tp_compare has a different signature.
+ But if it returns undefined we fall through. */
+ if (c != 2)
+ return c;
+ /* Else fall through to try_rich_to_3way_compare() */
+ }
+ else
+ return adjust_tp_compare(c);
+ }
+ /* We only get here if one of the following is true:
+ a) v and w have different types
+ b) v and w have the same type, which doesn't have tp_compare
+ c) v and w are instances, and either __cmp__ is not defined or
+ __cmp__ returns NotImplemented
+ */
+ c = try_rich_to_3way_compare(v, w);
+ if (c < 2)
+ return c;
+ c = try_3way_compare(v, w);
+ if (c < 2)
+ return c;
+ return default_3way_compare(v, w);
+}
+
+/* Compare v to w. Return
+ -1 if v < w or exception (PyErr_Occurred() true in latter case).
+ 0 if v == w.
+ 1 if v > w.
+ XXX The docs (C API manual) say the return value is undefined in case
+ XXX of error.
+*/
+int
+PyObject_Compare(PyObject *v, PyObject *w)
+{
+ int result;
+
+ if (v == NULL || w == NULL) {
+ PyErr_BadInternalCall();
+ return -1;
+ }
+ if (v == w)
+ return 0;
+ if (Py_EnterRecursiveCall(" in cmp"))
+ return -1;
+ result = do_cmp(v, w);
+ Py_LeaveRecursiveCall();
+ return result < 0 ? -1 : result;
+}
+
+/* Return (new reference to) Py_True or Py_False. */
+static PyObject *
+convert_3way_to_object(int op, int c)
+{
+ PyObject *result;
+ switch (op) {
+ case Py_LT: c = c < 0; break;
+ case Py_LE: c = c <= 0; break;
+ case Py_EQ: c = c == 0; break;
+ case Py_NE: c = c != 0; break;
+ case Py_GT: c = c > 0; break;
+ case Py_GE: c = c >= 0; break;
+ }
+ result = c ? Py_True : Py_False;
+ Py_INCREF(result);
+ return result;
+}
+
+/* We want a rich comparison but don't have one. Try a 3-way cmp instead.
+ Return
+ NULL if error
+ Py_True if v op w
+ Py_False if not (v op w)
+*/
+static PyObject *
+try_3way_to_rich_compare(PyObject *v, PyObject *w, int op)
+{
+ int c;
+
+ c = try_3way_compare(v, w);
+ if (c >= 2) {
+
+ /* Py3K warning if types are not equal and comparison isn't == or != */
+ if (Py_Py3kWarningFlag &&
+ v->ob_type != w->ob_type && op != Py_EQ && op != Py_NE &&
+ PyErr_WarnEx(PyExc_DeprecationWarning,
+ "comparing unequal types not supported "
+ "in 3.x", 1) < 0) {
+ return NULL;
+ }
+
+ c = default_3way_compare(v, w);
+ }
+ if (c <= -2)
+ return NULL;
+ return convert_3way_to_object(op, c);
+}
+
+/* Do rich comparison on v and w. Return
+ NULL if error
+ Else a new reference to an object other than Py_NotImplemented, usually(?):
+ Py_True if v op w
+ Py_False if not (v op w)
+*/
+static PyObject *
+do_richcmp(PyObject *v, PyObject *w, int op)
+{
+ PyObject *res;
+
+ res = try_rich_compare(v, w, op);
+ if (res != Py_NotImplemented)
+ return res;
+ Py_DECREF(res);
+
+ return try_3way_to_rich_compare(v, w, op);
+}
+
+/* Return:
+ NULL for exception;
+ some object not equal to NotImplemented if it is implemented
+ (this latter object may not be a Boolean).
+*/
+PyObject *
+PyObject_RichCompare(PyObject *v, PyObject *w, int op)
+{
+ PyObject *res;
+
+ assert(Py_LT <= op && op <= Py_GE);
+ if (Py_EnterRecursiveCall(" in cmp"))
+ return NULL;
+
+ /* If the types are equal, and not old-style instances, try to
+ get out cheap (don't bother with coercions etc.). */
+ if (v->ob_type == w->ob_type && !PyInstance_Check(v)) {
+ cmpfunc fcmp;
+ richcmpfunc frich = RICHCOMPARE(v->ob_type);
+ /* If the type has richcmp, try it first. try_rich_compare
+ tries it two-sided, which is not needed since we've a
+ single type only. */
+ if (frich != NULL) {
+ res = (*frich)(v, w, op);
+ if (res != Py_NotImplemented)
+ goto Done;
+ Py_DECREF(res);
+ }
+ /* No richcmp, or this particular richmp not implemented.
+ Try 3-way cmp. */
+ fcmp = v->ob_type->tp_compare;
+ if (fcmp != NULL) {
+ int c = (*fcmp)(v, w);
+ c = adjust_tp_compare(c);
+ if (c == -2) {
+ res = NULL;
+ goto Done;
+ }
+ res = convert_3way_to_object(op, c);
+ goto Done;
+ }
+ }
+
+ /* Fast path not taken, or couldn't deliver a useful result. */
+ res = do_richcmp(v, w, op);
+Done:
+ Py_LeaveRecursiveCall();
+ return res;
+}
+
+/* Return -1 if error; 1 if v op w; 0 if not (v op w). */
+int
+PyObject_RichCompareBool(PyObject *v, PyObject *w, int op)
+{
+ PyObject *res;
+ int ok;
+
+ /* Quick result when objects are the same.
+ Guarantees that identity implies equality. */
+ if (v == w) {
+ if (op == Py_EQ)
+ return 1;
+ else if (op == Py_NE)
+ return 0;
+ }
+
+ res = PyObject_RichCompare(v, w, op);
+ if (res == NULL)
+ return -1;
+ if (PyBool_Check(res))
+ ok = (res == Py_True);
+ else
+ ok = PyObject_IsTrue(res);
+ Py_DECREF(res);
+ return ok;
+}
+
+/* Set of hash utility functions to help maintaining the invariant that
+ if a==b then hash(a)==hash(b)
+
+ All the utility functions (_Py_Hash*()) return "-1" to signify an error.
+*/
+
+long
+_Py_HashDouble(double v)
+{
+ double intpart, fractpart;
+ int expo;
+ long hipart;
+ long x; /* the final hash value */
+ /* This is designed so that Python numbers of different types
+ * that compare equal hash to the same value; otherwise comparisons
+ * of mapping keys will turn out weird.
+ */
+
+ if (!Py_IS_FINITE(v)) {
+ if (Py_IS_INFINITY(v))
+ return v < 0 ? -271828 : 314159;
+ else
+ return 0;
+ }
+ fractpart = modf(v, &intpart);
+ if (fractpart == 0.0) {
+ /* This must return the same hash as an equal int or long. */
+ if (intpart > LONG_MAX/2 || -intpart > LONG_MAX/2) {
+ /* Convert to long and use its hash. */
+ PyObject *plong; /* converted to Python long */
+ plong = PyLong_FromDouble(v);
+ if (plong == NULL)
+ return -1;
+ x = PyObject_Hash(plong);
+ Py_DECREF(plong);
+ return x;
+ }
+ /* Fits in a C long == a Python int, so is its own hash. */
+ x = (long)intpart;
+ if (x == -1)
+ x = -2;
+ return x;
+ }
+ /* The fractional part is non-zero, so we don't have to worry about
+ * making this match the hash of some other type.
+ * Use frexp to get at the bits in the double.
+ * Since the VAX D double format has 56 mantissa bits, which is the
+ * most of any double format in use, each of these parts may have as
+ * many as (but no more than) 56 significant bits.
+ * So, assuming sizeof(long) >= 4, each part can be broken into two
+ * longs; frexp and multiplication are used to do that.
+ * Also, since the Cray double format has 15 exponent bits, which is
+ * the most of any double format in use, shifting the exponent field
+ * left by 15 won't overflow a long (again assuming sizeof(long) >= 4).
+ */
+ v = frexp(v, &expo);
+ v *= 2147483648.0; /* 2**31 */
+ hipart = (long)v; /* take the top 32 bits */
+ v = (v - (double)hipart) * 2147483648.0; /* get the next 32 bits */
+ x = hipart + (long)v + (expo << 15);
+ if (x == -1)
+ x = -2;
+ return x;
+}
+
+long
+_Py_HashPointer(void *p)
+{
+ long x;
+ size_t y = (size_t)p;
+ /* bottom 3 or 4 bits are likely to be 0; rotate y by 4 to avoid
+ excessive hash collisions for dicts and sets */
+ y = (y >> 4) | (y << (8 * SIZEOF_VOID_P - 4));
+ x = (long)y;
+ if (x == -1)
+ x = -2;
+ return x;
+}
+
+long
+PyObject_HashNotImplemented(PyObject *self)
+{
+ PyErr_Format(PyExc_TypeError, "unhashable type: '%.200s'",
+ self->ob_type->tp_name);
+ return -1;
+}
+
+long
+PyObject_Hash(PyObject *v)
+{
+ PyTypeObject *tp = v->ob_type;
+ if (tp->tp_hash != NULL)
+ return (*tp->tp_hash)(v);
+ /* To keep to the general practice that inheriting
+ * solely from object in C code should work without
+ * an explicit call to PyType_Ready, we implicitly call
+ * PyType_Ready here and then check the tp_hash slot again
+ */
+ if (tp->tp_dict == NULL) {
+ if (PyType_Ready(tp) < 0)
+ return -1;
+ if (tp->tp_hash != NULL)
+ return (*tp->tp_hash)(v);
+ }
+ if (tp->tp_compare == NULL && RICHCOMPARE(tp) == NULL) {
+ return _Py_HashPointer(v); /* Use address as hash value */
+ }
+ /* If there's a cmp but no hash defined, the object can't be hashed */
+ return PyObject_HashNotImplemented(v);
+}
+
+PyObject *
+PyObject_GetAttrString(PyObject *v, const char *name)
+{
+ PyObject *w, *res;
+
+ if (Py_TYPE(v)->tp_getattr != NULL)
+ return (*Py_TYPE(v)->tp_getattr)(v, (char*)name);
+ w = PyString_InternFromString(name);
+ if (w == NULL)
+ return NULL;
+ res = PyObject_GetAttr(v, w);
+ Py_XDECREF(w);
+ return res;
+}
+
+int
+PyObject_HasAttrString(PyObject *v, const char *name)
+{
+ PyObject *res = PyObject_GetAttrString(v, name);
+ if (res != NULL) {
+ Py_DECREF(res);
+ return 1;
+ }
+ PyErr_Clear();
+ return 0;
+}
+
+int
+PyObject_SetAttrString(PyObject *v, const char *name, PyObject *w)
+{
+ PyObject *s;
+ int res;
+
+ if (Py_TYPE(v)->tp_setattr != NULL)
+ return (*Py_TYPE(v)->tp_setattr)(v, (char*)name, w);
+ s = PyString_InternFromString(name);
+ if (s == NULL)
+ return -1;
+ res = PyObject_SetAttr(v, s, w);
+ Py_XDECREF(s);
+ return res;
+}
+
+PyObject *
+PyObject_GetAttr(PyObject *v, PyObject *name)
+{
+ PyTypeObject *tp = Py_TYPE(v);
+
+ if (!PyString_Check(name)) {
+#ifdef Py_USING_UNICODE
+ /* The Unicode to string conversion is done here because the
+ existing tp_getattro slots expect a string object as name
+ and we wouldn't want to break those. */
+ if (PyUnicode_Check(name)) {
+ name = _PyUnicode_AsDefaultEncodedString(name, NULL);
+ if (name == NULL)
+ return NULL;
+ }
+ else
+#endif
+ {
+ PyErr_Format(PyExc_TypeError,
+ "attribute name must be string, not '%.200s'",
+ Py_TYPE(name)->tp_name);
+ return NULL;
+ }
+ }
+ if (tp->tp_getattro != NULL)
+ return (*tp->tp_getattro)(v, name);
+ if (tp->tp_getattr != NULL)
+ return (*tp->tp_getattr)(v, PyString_AS_STRING(name));
+ PyErr_Format(PyExc_AttributeError,
+ "'%.50s' object has no attribute '%.400s'",
+ tp->tp_name, PyString_AS_STRING(name));
+ return NULL;
+}
+
+int
+PyObject_HasAttr(PyObject *v, PyObject *name)
+{
+ PyObject *res = PyObject_GetAttr(v, name);
+ if (res != NULL) {
+ Py_DECREF(res);
+ return 1;
+ }
+ PyErr_Clear();
+ return 0;
+}
+
+int
+PyObject_SetAttr(PyObject *v, PyObject *name, PyObject *value)
+{
+ PyTypeObject *tp = Py_TYPE(v);
+ int err;
+
+ if (!PyString_Check(name)){
+#ifdef Py_USING_UNICODE
+ /* The Unicode to string conversion is done here because the
+ existing tp_setattro slots expect a string object as name
+ and we wouldn't want to break those. */
+ if (PyUnicode_Check(name)) {
+ name = PyUnicode_AsEncodedString(name, NULL, NULL);
+ if (name == NULL)
+ return -1;
+ }
+ else
+#endif
+ {
+ PyErr_Format(PyExc_TypeError,
+ "attribute name must be string, not '%.200s'",
+ Py_TYPE(name)->tp_name);
+ return -1;
+ }
+ }
+ else
+ Py_INCREF(name);
+
+ PyString_InternInPlace(&name);
+ if (tp->tp_setattro != NULL) {
+ err = (*tp->tp_setattro)(v, name, value);
+ Py_DECREF(name);
+ return err;
+ }
+ if (tp->tp_setattr != NULL) {
+ err = (*tp->tp_setattr)(v, PyString_AS_STRING(name), value);
+ Py_DECREF(name);
+ return err;
+ }
+ Py_DECREF(name);
+ if (tp->tp_getattr == NULL && tp->tp_getattro == NULL)
+ PyErr_Format(PyExc_TypeError,
+ "'%.100s' object has no attributes "
+ "(%s .%.100s)",
+ tp->tp_name,
+ value==NULL ? "del" : "assign to",
+ PyString_AS_STRING(name));
+ else
+ PyErr_Format(PyExc_TypeError,
+ "'%.100s' object has only read-only attributes "
+ "(%s .%.100s)",
+ tp->tp_name,
+ value==NULL ? "del" : "assign to",
+ PyString_AS_STRING(name));
+ return -1;
+}
+
+/* Helper to get a pointer to an object's __dict__ slot, if any */
+
+PyObject **
+_PyObject_GetDictPtr(PyObject *obj)
+{
+ Py_ssize_t dictoffset;
+ PyTypeObject *tp = Py_TYPE(obj);
+
+ if (!(tp->tp_flags & Py_TPFLAGS_HAVE_CLASS))
+ return NULL;
+ dictoffset = tp->tp_dictoffset;
+ if (dictoffset == 0)
+ return NULL;
+ if (dictoffset < 0) {
+ Py_ssize_t tsize;
+ size_t size;
+
+ tsize = ((PyVarObject *)obj)->ob_size;
+ if (tsize < 0)
+ tsize = -tsize;
+ size = _PyObject_VAR_SIZE(tp, tsize);
+
+ dictoffset += (long)size;
+ assert(dictoffset > 0);
+ assert(dictoffset % SIZEOF_VOID_P == 0);
+ }
+ return (PyObject **) ((char *)obj + dictoffset);
+}
+
+PyObject *
+PyObject_SelfIter(PyObject *obj)
+{
+ Py_INCREF(obj);
+ return obj;
+}
+
+/* Helper used when the __next__ method is removed from a type:
+ tp_iternext is never NULL and can be safely called without checking
+ on every iteration.
+ */
+
+PyObject *
+_PyObject_NextNotImplemented(PyObject *self)
+{
+ PyErr_Format(PyExc_TypeError,
+ "'%.200s' object is not iterable",
+ Py_TYPE(self)->tp_name);
+ return NULL;
+}
+
+/* Generic GetAttr functions - put these in your tp_[gs]etattro slot */
+
+PyObject *
+_PyObject_GenericGetAttrWithDict(PyObject *obj, PyObject *name, PyObject *dict)
+{
+ PyTypeObject *tp = Py_TYPE(obj);
+ PyObject *descr = NULL;
+ PyObject *res = NULL;
+ descrgetfunc f;
+ Py_ssize_t dictoffset;
+ PyObject **dictptr;
+
+ if (!PyString_Check(name)){
+#ifdef Py_USING_UNICODE
+ /* The Unicode to string conversion is done here because the
+ existing tp_setattro slots expect a string object as name
+ and we wouldn't want to break those. */
+ if (PyUnicode_Check(name)) {
+ name = PyUnicode_AsEncodedString(name, NULL, NULL);
+ if (name == NULL)
+ return NULL;
+ }
+ else
+#endif
+ {
+ PyErr_Format(PyExc_TypeError,
+ "attribute name must be string, not '%.200s'",
+ Py_TYPE(name)->tp_name);
+ return NULL;
+ }
+ }
+ else
+ Py_INCREF(name);
+
+ if (tp->tp_dict == NULL) {
+ if (PyType_Ready(tp) < 0)
+ goto done;
+ }
+
+#if 0 /* XXX this is not quite _PyType_Lookup anymore */
+ /* Inline _PyType_Lookup */
+ {
+ Py_ssize_t i, n;
+ PyObject *mro, *base, *dict;
+
+ /* Look in tp_dict of types in MRO */
+ mro = tp->tp_mro;
+ assert(mro != NULL);
+ assert(PyTuple_Check(mro));
+ n = PyTuple_GET_SIZE(mro);
+ for (i = 0; i < n; i++) {
+ base = PyTuple_GET_ITEM(mro, i);
+ if (PyClass_Check(base))
+ dict = ((PyClassObject *)base)->cl_dict;
+ else {
+ assert(PyType_Check(base));
+ dict = ((PyTypeObject *)base)->tp_dict;
+ }
+ assert(dict && PyDict_Check(dict));
+ descr = PyDict_GetItem(dict, name);
+ if (descr != NULL)
+ break;
+ }
+ }
+#else
+ descr = _PyType_Lookup(tp, name);
+#endif
+
+ Py_XINCREF(descr);
+
+ f = NULL;
+ if (descr != NULL &&
+ PyType_HasFeature(descr->ob_type, Py_TPFLAGS_HAVE_CLASS)) {
+ f = descr->ob_type->tp_descr_get;
+ if (f != NULL && PyDescr_IsData(descr)) {
+ res = f(descr, obj, (PyObject *)obj->ob_type);
+ Py_DECREF(descr);
+ goto done;
+ }
+ }
+
+ if (dict == NULL) {
+ /* Inline _PyObject_GetDictPtr */
+ dictoffset = tp->tp_dictoffset;
+ if (dictoffset != 0) {
+ if (dictoffset < 0) {
+ Py_ssize_t tsize;
+ size_t size;
+
+ tsize = ((PyVarObject *)obj)->ob_size;
+ if (tsize < 0)
+ tsize = -tsize;
+ size = _PyObject_VAR_SIZE(tp, tsize);
+
+ dictoffset += (long)size;
+ assert(dictoffset > 0);
+ assert(dictoffset % SIZEOF_VOID_P == 0);
+ }
+ dictptr = (PyObject **) ((char *)obj + dictoffset);
+ dict = *dictptr;
+ }
+ }
+ if (dict != NULL) {
+ Py_INCREF(dict);
+ res = PyDict_GetItem(dict, name);
+ if (res != NULL) {
+ Py_INCREF(res);
+ Py_XDECREF(descr);
+ Py_DECREF(dict);
+ goto done;
+ }
+ Py_DECREF(dict);
+ }
+
+ if (f != NULL) {
+ res = f(descr, obj, (PyObject *)Py_TYPE(obj));
+ Py_DECREF(descr);
+ goto done;
+ }
+
+ if (descr != NULL) {
+ res = descr;
+ /* descr was already increfed above */
+ goto done;
+ }
+
+ PyErr_Format(PyExc_AttributeError,
+ "'%.50s' object has no attribute '%.400s'",
+ tp->tp_name, PyString_AS_STRING(name));
+ done:
+ Py_DECREF(name);
+ return res;
+}
+
+PyObject *
+PyObject_GenericGetAttr(PyObject *obj, PyObject *name)
+{
+ return _PyObject_GenericGetAttrWithDict(obj, name, NULL);
+}
+
+int
+_PyObject_GenericSetAttrWithDict(PyObject *obj, PyObject *name,
+ PyObject *value, PyObject *dict)
+{
+ PyTypeObject *tp = Py_TYPE(obj);
+ PyObject *descr;
+ descrsetfunc f;
+ PyObject **dictptr;
+ int res = -1;
+
+ if (!PyString_Check(name)){
+#ifdef Py_USING_UNICODE
+ /* The Unicode to string conversion is done here because the
+ existing tp_setattro slots expect a string object as name
+ and we wouldn't want to break those. */
+ if (PyUnicode_Check(name)) {
+ name = PyUnicode_AsEncodedString(name, NULL, NULL);
+ if (name == NULL)
+ return -1;
+ }
+ else
+#endif
+ {
+ PyErr_Format(PyExc_TypeError,
+ "attribute name must be string, not '%.200s'",
+ Py_TYPE(name)->tp_name);
+ return -1;
+ }
+ }
+ else
+ Py_INCREF(name);
+
+ if (tp->tp_dict == NULL) {
+ if (PyType_Ready(tp) < 0)
+ goto done;
+ }
+
+ descr = _PyType_Lookup(tp, name);
+ f = NULL;
+ if (descr != NULL &&
+ PyType_HasFeature(descr->ob_type, Py_TPFLAGS_HAVE_CLASS)) {
+ f = descr->ob_type->tp_descr_set;
+ if (f != NULL && PyDescr_IsData(descr)) {
+ res = f(descr, obj, value);
+ goto done;
+ }
+ }
+
+ if (dict == NULL) {
+ dictptr = _PyObject_GetDictPtr(obj);
+ if (dictptr != NULL) {
+ dict = *dictptr;
+ if (dict == NULL && value != NULL) {
+ dict = PyDict_New();
+ if (dict == NULL)
+ goto done;
+ *dictptr = dict;
+ }
+ }
+ }
+ if (dict != NULL) {
+ Py_INCREF(dict);
+ if (value == NULL)
+ res = PyDict_DelItem(dict, name);
+ else
+ res = PyDict_SetItem(dict, name, value);
+ if (res < 0 && PyErr_ExceptionMatches(PyExc_KeyError))
+ PyErr_SetObject(PyExc_AttributeError, name);
+ Py_DECREF(dict);
+ goto done;
+ }
+
+ if (f != NULL) {
+ res = f(descr, obj, value);
+ goto done;
+ }
+
+ if (descr == NULL) {
+ PyErr_Format(PyExc_AttributeError,
+ "'%.100s' object has no attribute '%.200s'",
+ tp->tp_name, PyString_AS_STRING(name));
+ goto done;
+ }
+
+ PyErr_Format(PyExc_AttributeError,
+ "'%.50s' object attribute '%.400s' is read-only",
+ tp->tp_name, PyString_AS_STRING(name));
+ done:
+ Py_DECREF(name);
+ return res;
+}
+
+int
+PyObject_GenericSetAttr(PyObject *obj, PyObject *name, PyObject *value)
+{
+ return _PyObject_GenericSetAttrWithDict(obj, name, value, NULL);
+}
+
+
+/* Test a value used as condition, e.g., in a for or if statement.
+ Return -1 if an error occurred */
+
+int
+PyObject_IsTrue(PyObject *v)
+{
+ Py_ssize_t res;
+ if (v == Py_True)
+ return 1;
+ if (v == Py_False)
+ return 0;
+ if (v == Py_None)
+ return 0;
+ else if (v->ob_type->tp_as_number != NULL &&
+ v->ob_type->tp_as_number->nb_nonzero != NULL)
+ res = (*v->ob_type->tp_as_number->nb_nonzero)(v);
+ else if (v->ob_type->tp_as_mapping != NULL &&
+ v->ob_type->tp_as_mapping->mp_length != NULL)
+ res = (*v->ob_type->tp_as_mapping->mp_length)(v);
+ else if (v->ob_type->tp_as_sequence != NULL &&
+ v->ob_type->tp_as_sequence->sq_length != NULL)
+ res = (*v->ob_type->tp_as_sequence->sq_length)(v);
+ else
+ return 1;
+ /* if it is negative, it should be either -1 or -2 */
+ return (res > 0) ? 1 : Py_SAFE_DOWNCAST(res, Py_ssize_t, int);
+}
+
+/* equivalent of 'not v'
+ Return -1 if an error occurred */
+
+int
+PyObject_Not(PyObject *v)
+{
+ int res;
+ res = PyObject_IsTrue(v);
+ if (res < 0)
+ return res;
+ return res == 0;
+}
+
+/* Coerce two numeric types to the "larger" one.
+ Increment the reference count on each argument.
+ Return value:
+ -1 if an error occurred;
+ 0 if the coercion succeeded (and then the reference counts are increased);
+ 1 if no coercion is possible (and no error is raised).
+*/
+int
+PyNumber_CoerceEx(PyObject **pv, PyObject **pw)
+{
+ register PyObject *v = *pv;
+ register PyObject *w = *pw;
+ int res;
+
+ /* Shortcut only for old-style types */
+ if (v->ob_type == w->ob_type &&
+ !PyType_HasFeature(v->ob_type, Py_TPFLAGS_CHECKTYPES))
+ {
+ Py_INCREF(v);
+ Py_INCREF(w);
+ return 0;
+ }
+ if (v->ob_type->tp_as_number && v->ob_type->tp_as_number->nb_coerce) {
+ res = (*v->ob_type->tp_as_number->nb_coerce)(pv, pw);
+ if (res <= 0)
+ return res;
+ }
+ if (w->ob_type->tp_as_number && w->ob_type->tp_as_number->nb_coerce) {
+ res = (*w->ob_type->tp_as_number->nb_coerce)(pw, pv);
+ if (res <= 0)
+ return res;
+ }
+ return 1;
+}
+
+/* Coerce two numeric types to the "larger" one.
+ Increment the reference count on each argument.
+ Return -1 and raise an exception if no coercion is possible
+ (and then no reference count is incremented).
+*/
+int
+PyNumber_Coerce(PyObject **pv, PyObject **pw)
+{
+ int err = PyNumber_CoerceEx(pv, pw);
+ if (err <= 0)
+ return err;
+ PyErr_SetString(PyExc_TypeError, "number coercion failed");
+ return -1;
+}
+
+
+/* Test whether an object can be called */
+
+int
+PyCallable_Check(PyObject *x)
+{
+ if (x == NULL)
+ return 0;
+ if (PyInstance_Check(x)) {
+ PyObject *call = PyObject_GetAttrString(x, "__call__");
+ if (call == NULL) {
+ PyErr_Clear();
+ return 0;
+ }
+ /* Could test recursively but don't, for fear of endless
+ recursion if some joker sets self.__call__ = self */
+ Py_DECREF(call);
+ return 1;
+ }
+ else {
+ return x->ob_type->tp_call != NULL;
+ }
+}
+
+/* ------------------------- PyObject_Dir() helpers ------------------------- */
+
+/* Helper for PyObject_Dir.
+ Merge the __dict__ of aclass into dict, and recursively also all
+ the __dict__s of aclass's base classes. The order of merging isn't
+ defined, as it's expected that only the final set of dict keys is
+ interesting.
+ Return 0 on success, -1 on error.
+*/
+
+static int
+merge_class_dict(PyObject* dict, PyObject* aclass)
+{
+ PyObject *classdict;
+ PyObject *bases;
+
+ assert(PyDict_Check(dict));
+ assert(aclass);
+
+ /* Merge in the type's dict (if any). */
+ classdict = PyObject_GetAttrString(aclass, "__dict__");
+ if (classdict == NULL)
+ PyErr_Clear();
+ else {
+ int status = PyDict_Update(dict, classdict);
+ Py_DECREF(classdict);
+ if (status < 0)
+ return -1;
+ }
+
+ /* Recursively merge in the base types' (if any) dicts. */
+ bases = PyObject_GetAttrString(aclass, "__bases__");
+ if (bases == NULL)
+ PyErr_Clear();
+ else {
+ /* We have no guarantee that bases is a real tuple */
+ Py_ssize_t i, n;
+ n = PySequence_Size(bases); /* This better be right */
+ if (n < 0)
+ PyErr_Clear();
+ else {
+ for (i = 0; i < n; i++) {
+ int status;
+ PyObject *base = PySequence_GetItem(bases, i);
+ if (base == NULL) {
+ Py_DECREF(bases);
+ return -1;
+ }
+ status = merge_class_dict(dict, base);
+ Py_DECREF(base);
+ if (status < 0) {
+ Py_DECREF(bases);
+ return -1;
+ }
+ }
+ }
+ Py_DECREF(bases);
+ }
+ return 0;
+}
+
+/* Helper for PyObject_Dir.
+ If obj has an attr named attrname that's a list, merge its string
+ elements into keys of dict.
+ Return 0 on success, -1 on error. Errors due to not finding the attr,
+ or the attr not being a list, are suppressed.
+*/
+
+static int
+merge_list_attr(PyObject* dict, PyObject* obj, const char *attrname)
+{
+ PyObject *list;
+ int result = 0;
+
+ assert(PyDict_Check(dict));
+ assert(obj);
+ assert(attrname);
+
+ list = PyObject_GetAttrString(obj, attrname);
+ if (list == NULL)
+ PyErr_Clear();
+
+ else if (PyList_Check(list)) {
+ int i;
+ for (i = 0; i < PyList_GET_SIZE(list); ++i) {
+ PyObject *item = PyList_GET_ITEM(list, i);
+ if (PyString_Check(item)) {
+ result = PyDict_SetItem(dict, item, Py_None);
+ if (result < 0)
+ break;
+ }
+ }
+ if (Py_Py3kWarningFlag &&
+ (strcmp(attrname, "__members__") == 0 ||
+ strcmp(attrname, "__methods__") == 0)) {
+ if (PyErr_WarnEx(PyExc_DeprecationWarning,
+ "__members__ and __methods__ not "
+ "supported in 3.x", 1) < 0) {
+ Py_XDECREF(list);
+ return -1;
+ }
+ }
+ }
+
+ Py_XDECREF(list);
+ return result;
+}
+
+/* Helper for PyObject_Dir without arguments: returns the local scope. */
+static PyObject *
+_dir_locals(void)
+{
+ PyObject *names;
+ PyObject *locals = PyEval_GetLocals();
+
+ if (locals == NULL) {
+ PyErr_SetString(PyExc_SystemError, "frame does not exist");
+ return NULL;
+ }
+
+ names = PyMapping_Keys(locals);
+ if (!names)
+ return NULL;
+ if (!PyList_Check(names)) {
+ PyErr_Format(PyExc_TypeError,
+ "dir(): expected keys() of locals to be a list, "
+ "not '%.200s'", Py_TYPE(names)->tp_name);
+ Py_DECREF(names);
+ return NULL;
+ }
+ /* the locals don't need to be DECREF'd */
+ return names;
+}
+
+/* Helper for PyObject_Dir of type objects: returns __dict__ and __bases__.
+ We deliberately don't suck up its __class__, as methods belonging to the
+ metaclass would probably be more confusing than helpful.
+*/
+static PyObject *
+_specialized_dir_type(PyObject *obj)
+{
+ PyObject *result = NULL;
+ PyObject *dict = PyDict_New();
+
+ if (dict != NULL && merge_class_dict(dict, obj) == 0)
+ result = PyDict_Keys(dict);
+
+ Py_XDECREF(dict);
+ return result;
+}
+
+/* Helper for PyObject_Dir of module objects: returns the module's __dict__. */
+static PyObject *
+_specialized_dir_module(PyObject *obj)
+{
+ PyObject *result = NULL;
+ PyObject *dict = PyObject_GetAttrString(obj, "__dict__");
+
+ if (dict != NULL) {
+ if (PyDict_Check(dict))
+ result = PyDict_Keys(dict);
+ else {
+ char *name = PyModule_GetName(obj);
+ if (name)
+ PyErr_Format(PyExc_TypeError,
+ "%.200s.__dict__ is not a dictionary",
+ name);
+ }
+ }
+
+ Py_XDECREF(dict);
+ return result;
+}
+
+/* Helper for PyObject_Dir of generic objects: returns __dict__, __class__,
+ and recursively up the __class__.__bases__ chain.
+*/
+static PyObject *
+_generic_dir(PyObject *obj)
+{
+ PyObject *result = NULL;
+ PyObject *dict = NULL;
+ PyObject *itsclass = NULL;
+
+ /* Get __dict__ (which may or may not be a real dict...) */
+ dict = PyObject_GetAttrString(obj, "__dict__");
+ if (dict == NULL) {
+ PyErr_Clear();
+ dict = PyDict_New();
+ }
+ else if (!PyDict_Check(dict)) {
+ Py_DECREF(dict);
+ dict = PyDict_New();
+ }
+ else {
+ /* Copy __dict__ to avoid mutating it. */
+ PyObject *temp = PyDict_Copy(dict);
+ Py_DECREF(dict);
+ dict = temp;
+ }
+
+ if (dict == NULL)
+ goto error;
+
+ /* Merge in __members__ and __methods__ (if any).
+ * This is removed in Python 3000. */
+ if (merge_list_attr(dict, obj, "__members__") < 0)
+ goto error;
+ if (merge_list_attr(dict, obj, "__methods__") < 0)
+ goto error;
+
+ /* Merge in attrs reachable from its class. */
+ itsclass = PyObject_GetAttrString(obj, "__class__");
+ if (itsclass == NULL)
+ /* XXX(tomer): Perhaps fall back to obj->ob_type if no
+ __class__ exists? */
+ PyErr_Clear();
+ else {
+ if (merge_class_dict(dict, itsclass) != 0)
+ goto error;
+ }
+
+ result = PyDict_Keys(dict);
+ /* fall through */
+error:
+ Py_XDECREF(itsclass);
+ Py_XDECREF(dict);
+ return result;
+}
+
+/* Helper for PyObject_Dir: object introspection.
+ This calls one of the above specialized versions if no __dir__ method
+ exists. */
+static PyObject *
+_dir_object(PyObject *obj)
+{
+ PyObject *result = NULL;
+ static PyObject *dir_str = NULL;
+ PyObject *dirfunc;
+
+ assert(obj);
+ if (PyInstance_Check(obj)) {
+ dirfunc = PyObject_GetAttrString(obj, "__dir__");
+ if (dirfunc == NULL) {
+ if (PyErr_ExceptionMatches(PyExc_AttributeError))
+ PyErr_Clear();
+ else
+ return NULL;
+ }
+ }
+ else {
+ dirfunc = _PyObject_LookupSpecial(obj, "__dir__", &dir_str);
+ if (PyErr_Occurred())
+ return NULL;
+ }
+ if (dirfunc == NULL) {
+ /* use default implementation */
+ if (PyModule_Check(obj))
+ result = _specialized_dir_module(obj);
+ else if (PyType_Check(obj) || PyClass_Check(obj))
+ result = _specialized_dir_type(obj);
+ else
+ result = _generic_dir(obj);
+ }
+ else {
+ /* use __dir__ */
+ result = PyObject_CallFunctionObjArgs(dirfunc, NULL);
+ Py_DECREF(dirfunc);
+ if (result == NULL)
+ return NULL;
+
+ /* result must be a list */
+ /* XXX(gbrandl): could also check if all items are strings */
+ if (!PyList_Check(result)) {
+ PyErr_Format(PyExc_TypeError,
+ "__dir__() must return a list, not %.200s",
+ Py_TYPE(result)->tp_name);
+ Py_DECREF(result);
+ result = NULL;
+ }
+ }
+
+ return result;
+}
+
+/* Implementation of dir() -- if obj is NULL, returns the names in the current
+ (local) scope. Otherwise, performs introspection of the object: returns a
+ sorted list of attribute names (supposedly) accessible from the object
+*/
+PyObject *
+PyObject_Dir(PyObject *obj)
+{
+ PyObject * result;
+
+ if (obj == NULL)
+ /* no object -- introspect the locals */
+ result = _dir_locals();
+ else
+ /* object -- introspect the object */
+ result = _dir_object(obj);
+
+ assert(result == NULL || PyList_Check(result));
+
+ if (result != NULL && PyList_Sort(result) != 0) {
+ /* sorting the list failed */
+ Py_DECREF(result);
+ result = NULL;
+ }
+
+ return result;
+}
+
+/*
+NoObject is usable as a non-NULL undefined value, used by the macro None.
+There is (and should be!) no way to create other objects of this type,
+so there is exactly one (which is indestructible, by the way).
+(XXX This type and the type of NotImplemented below should be unified.)
+*/
+
+/* ARGSUSED */
+static PyObject *
+none_repr(PyObject *op)
+{
+ return PyString_FromString("None");
+}
+
+/* ARGUSED */
+static void
+none_dealloc(PyObject* ignore)
+{
+ /* This should never get called, but we also don't want to SEGV if
+ * we accidentally decref None out of existence.
+ */
+ Py_FatalError("deallocating None");
+}
+
+
+static PyTypeObject PyNone_Type = {
+ PyVarObject_HEAD_INIT(&PyType_Type, 0)
+ "NoneType",
+ 0,
+ 0,
+ none_dealloc, /*tp_dealloc*/ /*never called*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare*/
+ none_repr, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ (hashfunc)_Py_HashPointer, /*tp_hash */
+};
+
+PyObject _Py_NoneStruct = {
+ _PyObject_EXTRA_INIT
+ 1, &PyNone_Type
+};
+
+/* NotImplemented is an object that can be used to signal that an
+ operation is not implemented for the given type combination. */
+
+static PyObject *
+NotImplemented_repr(PyObject *op)
+{
+ return PyString_FromString("NotImplemented");
+}
+
+static PyTypeObject PyNotImplemented_Type = {
+ PyVarObject_HEAD_INIT(&PyType_Type, 0)
+ "NotImplementedType",
+ 0,
+ 0,
+ none_dealloc, /*tp_dealloc*/ /*never called*/
+ 0, /*tp_print*/
+ 0, /*tp_getattr*/
+ 0, /*tp_setattr*/
+ 0, /*tp_compare*/
+ NotImplemented_repr, /*tp_repr*/
+ 0, /*tp_as_number*/
+ 0, /*tp_as_sequence*/
+ 0, /*tp_as_mapping*/
+ 0, /*tp_hash */
+};
+
+PyObject _Py_NotImplementedStruct = {
+ _PyObject_EXTRA_INIT
+ 1, &PyNotImplemented_Type
+};
+
+void
+_Py_ReadyTypes(void)
+{
+ if (PyType_Ready(&PyType_Type) < 0)
+ Py_FatalError("Can't initialize type type");
+
+ if (PyType_Ready(&_PyWeakref_RefType) < 0)
+ Py_FatalError("Can't initialize weakref type");
+
+ if (PyType_Ready(&_PyWeakref_CallableProxyType) < 0)
+ Py_FatalError("Can't initialize callable weakref proxy type");
+
+ if (PyType_Ready(&_PyWeakref_ProxyType) < 0)
+ Py_FatalError("Can't initialize weakref proxy type");
+
+ if (PyType_Ready(&PyBool_Type) < 0)
+ Py_FatalError("Can't initialize bool type");
+
+ if (PyType_Ready(&PyString_Type) < 0)
+ Py_FatalError("Can't initialize str type");
+
+ if (PyType_Ready(&PyByteArray_Type) < 0)
+ Py_FatalError("Can't initialize bytearray type");
+
+ if (PyType_Ready(&PyList_Type) < 0)
+ Py_FatalError("Can't initialize list type");
+
+ if (PyType_Ready(&PyNone_Type) < 0)
+ Py_FatalError("Can't initialize None type");
+
+ if (PyType_Ready(&PyNotImplemented_Type) < 0)
+ Py_FatalError("Can't initialize NotImplemented type");
+
+ if (PyType_Ready(&PyTraceBack_Type) < 0)
+ Py_FatalError("Can't initialize traceback type");
+
+ if (PyType_Ready(&PySuper_Type) < 0)
+ Py_FatalError("Can't initialize super type");
+
+ if (PyType_Ready(&PyBaseObject_Type) < 0)
+ Py_FatalError("Can't initialize object type");
+
+ if (PyType_Ready(&PyRange_Type) < 0)
+ Py_FatalError("Can't initialize xrange type");
+
+ if (PyType_Ready(&PyDict_Type) < 0)
+ Py_FatalError("Can't initialize dict type");
+
+ if (PyType_Ready(&PySet_Type) < 0)
+ Py_FatalError("Can't initialize set type");
+
+ if (PyType_Ready(&PyUnicode_Type) < 0)
+ Py_FatalError("Can't initialize unicode type");
+
+ if (PyType_Ready(&PySlice_Type) < 0)
+ Py_FatalError("Can't initialize slice type");
+
+ if (PyType_Ready(&PyStaticMethod_Type) < 0)
+ Py_FatalError("Can't initialize static method type");
+
+#ifndef WITHOUT_COMPLEX
+ if (PyType_Ready(&PyComplex_Type) < 0)
+ Py_FatalError("Can't initialize complex type");
+#endif
+
+ if (PyType_Ready(&PyFloat_Type) < 0)
+ Py_FatalError("Can't initialize float type");
+
+ if (PyType_Ready(&PyBuffer_Type) < 0)
+ Py_FatalError("Can't initialize buffer type");
+
+ if (PyType_Ready(&PyLong_Type) < 0)
+ Py_FatalError("Can't initialize long type");
+
+ if (PyType_Ready(&PyInt_Type) < 0)
+ Py_FatalError("Can't initialize int type");
+
+ if (PyType_Ready(&PyFrozenSet_Type) < 0)
+ Py_FatalError("Can't initialize frozenset type");
+
+ if (PyType_Ready(&PyProperty_Type) < 0)
+ Py_FatalError("Can't initialize property type");
+
+ if (PyType_Ready(&PyMemoryView_Type) < 0)
+ Py_FatalError("Can't initialize memoryview type");
+
+ if (PyType_Ready(&PyTuple_Type) < 0)
+ Py_FatalError("Can't initialize tuple type");
+
+ if (PyType_Ready(&PyEnum_Type) < 0)
+ Py_FatalError("Can't initialize enumerate type");
+
+ if (PyType_Ready(&PyReversed_Type) < 0)
+ Py_FatalError("Can't initialize reversed type");
+
+ if (PyType_Ready(&PyCode_Type) < 0)
+ Py_FatalError("Can't initialize code type");
+
+ if (PyType_Ready(&PyFrame_Type) < 0)
+ Py_FatalError("Can't initialize frame type");
+
+ if (PyType_Ready(&PyCFunction_Type) < 0)
+ Py_FatalError("Can't initialize builtin function type");
+
+ if (PyType_Ready(&PyMethod_Type) < 0)
+ Py_FatalError("Can't initialize method type");
+
+ if (PyType_Ready(&PyFunction_Type) < 0)
+ Py_FatalError("Can't initialize function type");
+
+ if (PyType_Ready(&PyClass_Type) < 0)
+ Py_FatalError("Can't initialize class type");
+
+ if (PyType_Ready(&PyDictProxy_Type) < 0)
+ Py_FatalError("Can't initialize dict proxy type");
+
+ if (PyType_Ready(&PyGen_Type) < 0)
+ Py_FatalError("Can't initialize generator type");
+
+ if (PyType_Ready(&PyGetSetDescr_Type) < 0)
+ Py_FatalError("Can't initialize get-set descriptor type");
+
+ if (PyType_Ready(&PyWrapperDescr_Type) < 0)
+ Py_FatalError("Can't initialize wrapper type");
+
+ if (PyType_Ready(&PyInstance_Type) < 0)
+ Py_FatalError("Can't initialize instance type");
+
+ if (PyType_Ready(&PyEllipsis_Type) < 0)
+ Py_FatalError("Can't initialize ellipsis type");
+
+ if (PyType_Ready(&PyMemberDescr_Type) < 0)
+ Py_FatalError("Can't initialize member descriptor type");
+
+ if (PyType_Ready(&PyFile_Type) < 0)
+ Py_FatalError("Can't initialize file type");
+}
+
+
+#ifdef Py_TRACE_REFS
+
+void
+_Py_NewReference(PyObject *op)
+{
+ _Py_INC_REFTOTAL;
+ op->ob_refcnt = 1;
+ _Py_AddToAllObjects(op, 1);
+ _Py_INC_TPALLOCS(op);
+}
+
+void
+_Py_ForgetReference(register PyObject *op)
+{
+#ifdef SLOW_UNREF_CHECK
+ register PyObject *p;
+#endif
+ if (op->ob_refcnt < 0)
+ Py_FatalError("UNREF negative refcnt");
+ if (op == &refchain ||
+ op->_ob_prev->_ob_next != op || op->_ob_next->_ob_prev != op)
+ Py_FatalError("UNREF invalid object");
+#ifdef SLOW_UNREF_CHECK
+ for (p = refchain._ob_next; p != &refchain; p = p->_ob_next) {
+ if (p == op)
+ break;
+ }
+ if (p == &refchain) /* Not found */
+ Py_FatalError("UNREF unknown object");
+#endif
+ op->_ob_next->_ob_prev = op->_ob_prev;
+ op->_ob_prev->_ob_next = op->_ob_next;
+ op->_ob_next = op->_ob_prev = NULL;
+ _Py_INC_TPFREES(op);
+}
+
+void
+_Py_Dealloc(PyObject *op)
+{
+ destructor dealloc = Py_TYPE(op)->tp_dealloc;
+ _Py_ForgetReference(op);
+ (*dealloc)(op);
+}
+
+/* Print all live objects. Because PyObject_Print is called, the
+ * interpreter must be in a healthy state.
+ */
+void
+_Py_PrintReferences(FILE *fp)
+{
+ PyObject *op;
+ fprintf(fp, "Remaining objects:\n");
+ for (op = refchain._ob_next; op != &refchain; op = op->_ob_next) {
+ fprintf(fp, "%p [%" PY_FORMAT_SIZE_T "d] ", op, op->ob_refcnt);
+ if (PyObject_Print(op, fp, 0) != 0)
+ PyErr_Clear();
+ putc('\n', fp);
+ }
+}
+
+/* Print the addresses of all live objects. Unlike _Py_PrintReferences, this
+ * doesn't make any calls to the Python C API, so is always safe to call.
+ */
+void
+_Py_PrintReferenceAddresses(FILE *fp)
+{
+ PyObject *op;
+ fprintf(fp, "Remaining object addresses:\n");
+ for (op = refchain._ob_next; op != &refchain; op = op->_ob_next)
+ fprintf(fp, "%p [%" PY_FORMAT_SIZE_T "d] %s\n", op,
+ op->ob_refcnt, Py_TYPE(op)->tp_name);
+}
+
+PyObject *
+_Py_GetObjects(PyObject *self, PyObject *args)
+{
+ int i, n;
+ PyObject *t = NULL;
+ PyObject *res, *op;
+
+ if (!PyArg_ParseTuple(args, "i|O", &n, &t))
+ return NULL;
+ op = refchain._ob_next;
+ res = PyList_New(0);
+ if (res == NULL)
+ return NULL;
+ for (i = 0; (n == 0 || i < n) && op != &refchain; i++) {
+ while (op == self || op == args || op == res || op == t ||
+ (t != NULL && Py_TYPE(op) != (PyTypeObject *) t)) {
+ op = op->_ob_next;
+ if (op == &refchain)
+ return res;
+ }
+ if (PyList_Append(res, op) < 0) {
+ Py_DECREF(res);
+ return NULL;
+ }
+ op = op->_ob_next;
+ }
+ return res;
+}
+
+#endif
+
+
+/* Hack to force loading of capsule.o */
+PyTypeObject *_Py_capsule_hack = &PyCapsule_Type;
+
+
+/* Hack to force loading of cobject.o */
+PyTypeObject *_Py_cobject_hack = &PyCObject_Type;
+
+
+/* Hack to force loading of abstract.o */
+Py_ssize_t (*_Py_abstract_hack)(PyObject *) = PyObject_Size;
+
+
+/* Python's malloc wrappers (see pymem.h) */
+
+void *
+PyMem_Malloc(size_t nbytes)
+{
+ return PyMem_MALLOC(nbytes);
+}
+
+void *
+PyMem_Realloc(void *p, size_t nbytes)
+{
+ return PyMem_REALLOC(p, nbytes);
+}
+
+void
+PyMem_Free(void *p)
+{
+ PyMem_FREE(p);
+}
+
+
+/* These methods are used to control infinite recursion in repr, str, print,
+ etc. Container objects that may recursively contain themselves,
+ e.g. builtin dictionaries and lists, should used Py_ReprEnter() and
+ Py_ReprLeave() to avoid infinite recursion.
+
+ Py_ReprEnter() returns 0 the first time it is called for a particular
+ object and 1 every time thereafter. It returns -1 if an exception
+ occurred. Py_ReprLeave() has no return value.
+
+ See dictobject.c and listobject.c for examples of use.
+*/
+
+#define KEY "Py_Repr"
+
+int
+Py_ReprEnter(PyObject *obj)
+{
+ PyObject *dict;
+ PyObject *list;
+ Py_ssize_t i;
+
+ dict = PyThreadState_GetDict();
+ if (dict == NULL)
+ return 0;
+ list = PyDict_GetItemString(dict, KEY);
+ if (list == NULL) {
+ list = PyList_New(0);
+ if (list == NULL)
+ return -1;
+ if (PyDict_SetItemString(dict, KEY, list) < 0)
+ return -1;
+ Py_DECREF(list);
+ }
+ i = PyList_GET_SIZE(list);
+ while (--i >= 0) {
+ if (PyList_GET_ITEM(list, i) == obj)
+ return 1;
+ }
+ PyList_Append(list, obj);
+ return 0;
+}
+
+void
+Py_ReprLeave(PyObject *obj)
+{
+ PyObject *dict;
+ PyObject *list;
+ Py_ssize_t i;
+
+ dict = PyThreadState_GetDict();
+ if (dict == NULL)
+ return;
+ list = PyDict_GetItemString(dict, KEY);
+ if (list == NULL || !PyList_Check(list))
+ return;
+ i = PyList_GET_SIZE(list);
+ /* Count backwards because we always expect obj to be list[-1] */
+ while (--i >= 0) {
+ if (PyList_GET_ITEM(list, i) == obj) {
+ PyList_SetSlice(list, i, i + 1, NULL);
+ break;
+ }
+ }
+}
+
+/* Trashcan support. */
+
+/* Current call-stack depth of tp_dealloc calls. */
+int _PyTrash_delete_nesting = 0;
+
+/* List of objects that still need to be cleaned up, singly linked via their
+ * gc headers' gc_prev pointers.
+ */
+PyObject *_PyTrash_delete_later = NULL;
+
+/* Add op to the _PyTrash_delete_later list. Called when the current
+ * call-stack depth gets large. op must be a currently untracked gc'ed
+ * object, with refcount 0. Py_DECREF must already have been called on it.
+ */
+void
+_PyTrash_deposit_object(PyObject *op)
+{
+ assert(PyObject_IS_GC(op));
+ assert(_Py_AS_GC(op)->gc.gc_refs == _PyGC_REFS_UNTRACKED);
+ assert(op->ob_refcnt == 0);
+ _Py_AS_GC(op)->gc.gc_prev = (PyGC_Head *)_PyTrash_delete_later;
+ _PyTrash_delete_later = op;
+}
+
+/* Dealloccate all the objects in the _PyTrash_delete_later list. Called when
+ * the call-stack unwinds again.
+ */
+void
+_PyTrash_destroy_chain(void)
+{
+ while (_PyTrash_delete_later) {
+ PyObject *op = _PyTrash_delete_later;
+ destructor dealloc = Py_TYPE(op)->tp_dealloc;
+
+ _PyTrash_delete_later =
+ (PyObject*) _Py_AS_GC(op)->gc.gc_prev;
+
+ /* Call the deallocator directly. This used to try to
+ * fool Py_DECREF into calling it indirectly, but
+ * Py_DECREF was already called on this object, and in
+ * assorted non-release builds calling Py_DECREF again ends
+ * up distorting allocation statistics.
+ */
+ assert(op->ob_refcnt == 0);
+ ++_PyTrash_delete_nesting;
+ (*dealloc)(op);
+ --_PyTrash_delete_nesting;
+ }
+}
+
+#ifdef __cplusplus
+}
+#endif
|