Commit 3a9ce10b authored by Robert Bradshaw's avatar Robert Bradshaw

Fix bug when indexing with large unsigned int

parent e95d3eb7
......@@ -1253,6 +1253,7 @@ class IndexNode(ExprNode):
self.index.analyse_types(env)
if self.base.type.is_pyobject:
if self.index.type.is_int:
self.original_index_type = self.index.type
self.index = self.index.coerce_to(PyrexTypes.c_py_ssize_t_type, env).coerce_to_simple(env)
if getting:
env.use_utility_code(getitem_int_utility_code)
......@@ -1289,6 +1290,15 @@ class IndexNode(ExprNode):
return "(%s[%s])" % (
self.base.result_code, self.index.result_code)
def index_unsigned_parameter(self):
if self.index.type.is_int:
if self.original_index_type.signed:
return ", 0"
else:
return ", sizeof(Py_ssize_t) >= sizeof(%s)" % self.original_index_type.declaration_code("")
else:
return ""
def generate_subexpr_evaluation_code(self, code):
self.base.generate_evaluation_code(code)
self.index.generate_evaluation_code(code)
......@@ -1305,12 +1315,14 @@ class IndexNode(ExprNode):
else:
function = "PyObject_GetItem"
index_code = self.index.py_result()
sign_code = ""
code.putln(
"%s = %s(%s, %s); if (!%s) %s" % (
"%s = %s(%s, %s%s); if (!%s) %s" % (
self.result_code,
function,
self.base.py_result(),
index_code,
self.index_unsigned_parameter(),
self.result_code,
code.error_goto(self.pos)))
......@@ -1322,11 +1334,12 @@ class IndexNode(ExprNode):
function = "PyObject_SetItem"
index_code = self.index.py_result()
code.putln(
"if (%s(%s, %s, %s) < 0) %s" % (
"if (%s(%s, %s, %s%s) < 0) %s" % (
function,
self.base.py_result(),
index_code,
value_code,
self.index_unsigned_parameter(),
code.error_goto(self.pos)))
def generate_assignment_code(self, rhs, code):
......@@ -4112,9 +4125,12 @@ static void __Pyx_TypeModified(PyTypeObject* type) {
#------------------------------------------------------------------------------------
# If the is_unsigned flag is set, we need to do some extra work to make
# sure the index doesn't become negative.
getitem_int_utility_code = [
"""
static INLINE PyObject *__Pyx_GetItemInt(PyObject *o, Py_ssize_t i) {
static INLINE PyObject *__Pyx_GetItemInt(PyObject *o, Py_ssize_t i, int is_unsigned) {
PyObject *r;
if (PyList_CheckExact(o) && 0 <= i && i < PyList_GET_SIZE(o)) {
r = PyList_GET_ITEM(o, i);
......@@ -4124,10 +4140,10 @@ static INLINE PyObject *__Pyx_GetItemInt(PyObject *o, Py_ssize_t i) {
r = PyTuple_GET_ITEM(o, i);
Py_INCREF(r);
}
else if (Py_TYPE(o)->tp_as_sequence && Py_TYPE(o)->tp_as_sequence->sq_item)
else if (Py_TYPE(o)->tp_as_sequence && Py_TYPE(o)->tp_as_sequence->sq_item && (likely(i >= 0) || !is_unsigned))
r = PySequence_GetItem(o, i);
else {
PyObject *j = PyInt_FromLong(i);
PyObject *j = (likely(i >= 0) || !is_unsigned) ? PyInt_FromLong(i) : PyLong_FromUnsignedLongLong((sizeof(unsigned long long) > sizeof(Py_ssize_t) ? (1ULL << (sizeof(Py_ssize_t)*8)) : 0) + i);
if (!j)
return 0;
r = PyObject_GetItem(o, j);
......@@ -4143,7 +4159,7 @@ static INLINE PyObject *__Pyx_GetItemInt(PyObject *o, Py_ssize_t i) {
setitem_int_utility_code = [
"""
static INLINE int __Pyx_SetItemInt(PyObject *o, Py_ssize_t i, PyObject *v) {
static INLINE int __Pyx_SetItemInt(PyObject *o, Py_ssize_t i, PyObject *v, int is_unsigned) {
int r;
if (PyList_CheckExact(o) && 0 <= i && i < PyList_GET_SIZE(o)) {
Py_DECREF(PyList_GET_ITEM(o, i));
......@@ -4151,10 +4167,10 @@ static INLINE int __Pyx_SetItemInt(PyObject *o, Py_ssize_t i, PyObject *v) {
PyList_SET_ITEM(o, i, v);
return 1;
}
else if (Py_TYPE(o)->tp_as_sequence && Py_TYPE(o)->tp_as_sequence->sq_ass_item)
else if (Py_TYPE(o)->tp_as_sequence && Py_TYPE(o)->tp_as_sequence->sq_ass_item && (likely(i >= 0) || !is_unsigned))
r = PySequence_SetItem(o, i, v);
else {
PyObject *j = PyInt_FromLong(i);
PyObject *j = (likely(i >= 0) || !is_unsigned) ? PyInt_FromLong(i) : PyLong_FromUnsignedLongLong((sizeof(unsigned long long) > sizeof(Py_ssize_t) ? (1ULL << (sizeof(Py_ssize_t)*8)) : 0) + i);
if (!j)
return -1;
r = PyObject_SetItem(o, j, v);
......
__doc__ = u"""
>>> test()
neg -1
pos 4294967294
neg
pos
neg
pos
"""
def test():
cdef long neg = -1
cdef unsigned long pos = -2 # will be a large positive number
print "neg", neg
print "pos", pos
D = { neg: 'neg', pos: 'pos' }
print D[<object>neg]
print D[<object>pos]
print D[neg]
print D[pos]
\ No newline at end of file
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