8000 Throw errors when indexing into empty array_view objects by jkseppan · Pull Request #5247 · matplotlib/matplotlib · GitHub
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Throw errors when indexing into empty array_view objects #5247

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Throw errors when indexing into empty array_view objects #5247

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ed134d5
Throw errors when indexing into empty array_view objects
jkseppan Oct 15, 2015
aa38c5b
Use null data instead of a separate flag
jkseppan Oct 15, 2015
cae71f6
Make array_view.size return 0 for empty arrays
jkseppan Oct 15, 2015
8698b5e
Use m_data==NULL as the condition in size()
jkseppan Oct 15, 2015
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Use null data instead of a separate flag 
to mark empty array views
  • Loading branch information
@jkseppan
jkseppan committed Oct 15, 2015
commit aa38c5b0e338a708db573e47632019bb0bfe3248
57 changes: 29 additions & 28 deletions src/numpy_cpp.h
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Original file line number Diff line number Diff line change
Expand Up @@ -242,7 +242,7 @@ class array_view_accessors<AV, T, 1>
T &operator()(npy_intp i)
{
AVC *self = static_cast<AVC *>(this);
if (unlikely(self->m_empty)) {
if (unlikely(self->m_data == NULL)) {
throw std::out_of_range("indexing into an array_view with no data");
}

Expand All @@ -252,7 +252,7 @@ class array_view_accessors<AV, T, 1>
const T &operator()(npy_intp i) const
{
const AVC *self = static_cast<const AVC *>(this);
if (unlikely(self->m_empty)) {
if (unlikely(self->m_data == NULL)) {
throw std::out_of_range("indexing into an array_view with no data");
}

Expand All @@ -262,7 +262,7 @@ class array_view_accessors<AV, T, 1>
T &operator[](npy_intp i)
{
AVC *self = static_cast<AVC *>(this);
if (unlikely(self->m_empty)) {
if (unlikely(self->m_data == NULL)) {
throw std::out_of_range("indexing into an array_view with no data");
}

Expand All @@ -272,7 +272,7 @@ class array_view_accessors<AV, T, 1>
const T &operator[](npy_intp i) const
{
const AVC *self = static_cast<const AVC *>(this);
if (unlikely(self->m_empty)) {
if (unlikely(self->m_data == NULL)) {
throw std::out_of_range("indexing into an array_view with no data");
}

Expand All @@ -290,7 +290,7 @@ class array_view_accessors<AV, T, 2>
T &operator()(npy_intp i, npy_intp j)
{
AVC *self = static_cast<AVC *>(this);
if (unlikely(self->m_empty)) {
if (unlikely(self->m_data == NULL)) {
throw std::out_of_range("indexing into an array_view with no data");
}

Expand All @@ -301,7 +301,7 @@ class array_view_accessors<AV, T, 2>
const T &operator()(npy_intp i, npy_intp j) const
{
const AVC *self = static_cast<const AVC *>(this);
if (unlikely(self->m_empty)) {
if (unlikely(self->m_data == NULL)) {
throw std::out_of_range("indexing into an array_view with no data");
}

Expand All @@ -312,7 +312,7 @@ class array_view_accessors<AV, T, 2>
sub_t operator[](npy_intp i) const
{
const AVC *self = static_cast<const AVC *>(this);
if (unlikely(self->m_empty)) {
if (unlikely(self->m_data == NULL)) {
throw std::out_of_range("indexing into an array_view with no data");
}

Expand All @@ -333,7 +333,7 @@ class array_view_accessors<AV, T, 3>
T &operator()(npy_intp i, npy_intp j, npy_intp k)
{
AVC *self = static_cast<AVC *>(this);
if (unlikely(self->m_empty)) {
if (unlikely(self->m_data == NULL)) {
throw std::out_of_range("indexing into an array_view with no data");
}

Expand All @@ -344,7 +344,7 @@ class array_view_accessors<AV, T, 3>
const T &operator()(npy_intp i, npy_intp j, npy_intp k) const
{
const AVC *self = static_cast<const AVC *>(this);
if (unlikely(self->m_empty)) {
if (unlikely(self->m_data == NULL)) {
throw std::out_of_range("indexing into an array_view with no data");
}

Expand All @@ -355,7 +355,7 @@ class array_view_accessors<AV, T, 3>
sub_t operator[](npy_intp i) const
{
const AVC *self = static_cast<const AVC *>(this);
if (unlikely(self->m_empty)) {
if (unlikely(self->m_data == NULL)) {
throw std::out_of_range("indexing into an array_view with no data");
}

Expand Down Expand Up @@ -386,9 +386,6 @@ class array_view : public detail::array_view_accessors<array_view, T, ND>
npy_intp *m_shape;
npy_intp *m_strides;
char *m_data;
// Flag for a limited kind of bounds checking,
// not the same as the empty() method which checks the outer dimension
bool m_empty;

public:
typedef T value_type;
Expand All @@ -401,7 +398,6 @@ class array_view : public detail::array_view_accessors<array_view, T, ND>
{
m_shape = zeros;
m_strides = zeros;
m_empty = true;
}

array_view(PyObject *arr, bool contiguous = false) : m_arr(NULL), m_data(NULL)
Expand All @@ -418,22 +414,26 @@ class array_view : public detail::array_view_accessors<array_view, T, ND>
m_data = other.m_data;
m_shape = other.m_shape;
m_strides = other.m_strides;
m_empty = other.m_empty;
}

array_view(PyArrayObject *arr, char *data, npy_intp *shape, npy_intp *strides)
{
m_arr = arr;
Py_XINCREF(arr);
m_data = data;
m_shape = shape;
m_strides = strides;
m_empty = (ND == 0);
bool empty = (ND == 0);
for (size_t i = 0; i < ND; i++) {
if (shape[i] == 0) {
m_empty = true;
empty = true;
}
}

m_arr = arr;
Py_XINCREF(arr);
if (empty) {
m_data = NULL;
} else {
m_data = data;
}
m_shape = shape;
m_strides = strides;
}

array_view(npy_intp shape[ND]) : m_arr(NULL), m_shape(NULL), m_strides(NULL), m_data(NULL)
Expand Down Expand Up @@ -464,7 +464,6 @@ class array_view : public detail::array_view_accessors<array_view, T, ND>
m_data = other.m_data;
m_shape = other.m_shape;
m_strides = other.m_strides;
m_empty = other.m_empty;
}
return *this;
}
Expand All @@ -479,7 +478,6 @@ class array_view : public detail::array_view_accessors<array_view, T, ND>
m_data = NULL;
m_shape = zeros;
m_strides = zeros;
m_empty = true;
} else {
if (contiguous) {
tmp = (PyArrayObject *)PyArray_ContiguousFromAny(arr, type_num_of<T>::value, 0, ND);
Expand All @@ -498,7 +496,6 @@ class array_view : public detail::array_view_accessors<array_view, T, ND>
m_strides = zeros;
if (PyArray_NDIM(tmp) == 0 && ND == 0) {
m_arr = tmp;
m_empty = true;
return 1;
}
}
Expand All @@ -516,13 +513,17 @@ class array_view : public detail::array_view_accessors<array_view, T, ND>
m_arr = tmp;
m_shape = PyArray_DIMS(m_arr);
m_strides = PyArray_STRIDES(m_arr);
m_data = (char *)PyArray_BYTES(tmp);
m_empty = (ND == 0);
bool empty = (ND == 0);
for (size_t i = 0; i < ND; i++) {
if (m_shape[i] == 0) {
m_empty = true;
empty = true;
}
}
if (empty) {
m_data = NULL;
} else {
m_data = (char *)PyArray_BYTES(tmp);
}
}

return 1;
Expand Down
0