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bpo-29741: Clean up C implementations of BytesIO and StringIO. (#606) 

Some BytesIO methods now accept not just int subclasses but other int-like types.
This commit is contained in:
orenmn 2017-03-11 00:52:01 +02:00 committed by Serhiy Storchaka
parent 7e52c3e7ae
commit 740025478d
4 changed files with 68 additions and 120 deletions
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73
Modules/_io/bytesio.c
View File

@ -8,6 +8,13 @@ class _io.BytesIO "bytesio *" "&PyBytesIO_Type"
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=7f50ec034f5c0b26]*/
/*[python input]
class io_ssize_t_converter(CConverter):
type = 'Py_ssize_t'
converter = '_PyIO_ConvertSsize_t'
[python start generated code]*/
/*[python end generated code: output=da39a3ee5e6b4b0d input=d0a811d3cbfd1b33]*/
typedef struct {
PyObject_HEAD
PyObject *buf;
@ -374,7 +381,7 @@ read_bytes(bytesio *self, Py_ssize_t size)
/*[clinic input]
_io.BytesIO.read
size as arg: object = None
size: io_ssize_t = -1
/
Read at most size bytes, returned as a bytes object.
@ -384,28 +391,13 @@ Return an empty bytes object at EOF.
[clinic start generated code]*/
static PyObject *
_io_BytesIO_read_impl(bytesio *self, PyObject *arg)
/*[clinic end generated code: output=85dacb535c1e1781 input=cc7ba4a797bb1555]*/
_io_BytesIO_read_impl(bytesio *self, Py_ssize_t size)
/*[clinic end generated code: output=9cc025f21c75bdd2 input=c81ec53b8f2cc3cf]*/
{
Py_ssize_t size, n;
Py_ssize_t n;
CHECK_CLOSED(self);
if (PyLong_Check(arg)) {
size = PyLong_AsSsize_t(arg);
if (size == -1 && PyErr_Occurred())
return NULL;
}
else if (arg == Py_None) {
/* Read until EOF is reached, by default. */
size = -1;
}
else {
PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",
Py_TYPE(arg)->tp_name);
return NULL;
}
/* adjust invalid sizes */
n = self->string_size - self->pos;
if (size < 0 || size > n) {
@ -420,7 +412,7 @@ _io_BytesIO_read_impl(bytesio *self, PyObject *arg)
/*[clinic input]
_io.BytesIO.read1
size: object(c_default="Py_None") = -1
size: io_ssize_t = -1
/
Read at most size bytes, returned as a bytes object.
@ -430,15 +422,15 @@ Return an empty bytes object at EOF.
[clinic start generated code]*/
static PyObject *
_io_BytesIO_read1_impl(bytesio *self, PyObject *size)
/*[clinic end generated code: output=a60d80c84c81a6b8 input=0951874bafee8e80]*/
_io_BytesIO_read1_impl(bytesio *self, Py_ssize_t size)
/*[clinic end generated code: output=d0f843285aa95f1c input=67cf18b142111664]*/
{
return _io_BytesIO_read_impl(self, size);
}
/*[clinic input]
_io.BytesIO.readline
size as arg: object = None
size: io_ssize_t = -1
/
Next line from the file, as a bytes object.
@ -449,28 +441,13 @@ Return an empty bytes object at EOF.
[clinic start generated code]*/
static PyObject *
_io_BytesIO_readline_impl(bytesio *self, PyObject *arg)
/*[clinic end generated code: output=1c2115534a4f9276 input=ca31f06de6eab257]*/
_io_BytesIO_readline_impl(bytesio *self, Py_ssize_t size)
/*[clinic end generated code: output=4bff3c251df8ffcd input=7c95bd3f9e9d1646]*/
{
Py_ssize_t size, n;
Py_ssize_t n;
CHECK_CLOSED(self);
if (PyLong_Check(arg)) {
size = PyLong_AsSsize_t(arg);
if (size == -1 && PyErr_Occurred())
return NULL;
}
else if (arg == Py_None) {
/* No size limit, by default. */
size = -1;
}
else {
PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",
Py_TYPE(arg)->tp_name);
return NULL;
}
n = scan_eol(self, size);
return read_bytes(self, n);
@ -597,19 +574,15 @@ _io_BytesIO_truncate_impl(bytesio *self, PyObject *arg)
CHECK_CLOSED(self);
CHECK_EXPORTS(self);
if (PyLong_Check(arg)) {
size = PyLong_AsSsize_t(arg);
if (size == -1 && PyErr_Occurred())
return NULL;
}
else if (arg == Py_None) {
if (arg == Py_None) {
/* Truncate to current position if no argument is passed. */
size = self->pos;
}
else {
PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",
Py_TYPE(arg)->tp_name);
return NULL;
size = PyNumber_AsSsize_t(arg, PyExc_OverflowError);
if (size == -1 && PyErr_Occurred()) {
return NULL;
}
}
if (size < 0) {

37
Modules/_io/clinic/bytesio.c.h
View File

@ -149,7 +149,7 @@ _io_BytesIO_tell(bytesio *self, PyObject *Py_UNUSED(ignored))
}
PyDoc_STRVAR(_io_BytesIO_read__doc__,
"read($self, size=None, /)\n"
"read($self, size=-1, /)\n"
"--\n"
"\n"
"Read at most size bytes, returned as a bytes object.\n"
@ -161,24 +161,23 @@ PyDoc_STRVAR(_io_BytesIO_read__doc__,
{"read", (PyCFunction)_io_BytesIO_read, METH_FASTCALL, _io_BytesIO_read__doc__},
static PyObject *
_io_BytesIO_read_impl(bytesio *self, PyObject *arg);
_io_BytesIO_read_impl(bytesio *self, Py_ssize_t size);
static PyObject *
_io_BytesIO_read(bytesio *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *return_value = NULL;
PyObject *arg = Py_None;
Py_ssize_t size = -1;
if (!_PyArg_UnpackStack(args, nargs, "read",
0, 1,
&arg)) {
if (!_PyArg_ParseStack(args, nargs, "|O&:read",
_PyIO_ConvertSsize_t, &size)) {
goto exit;
}
if (!_PyArg_NoStackKeywords("read", kwnames)) {
goto exit;
}
return_value = _io_BytesIO_read_impl(self, arg);
return_value = _io_BytesIO_read_impl(self, size);
exit:
return return_value;
@ -197,17 +196,16 @@ PyDoc_STRVAR(_io_BytesIO_read1__doc__,
{"read1", (PyCFunction)_io_BytesIO_read1, METH_FASTCALL, _io_BytesIO_read1__doc__},
static PyObject *
_io_BytesIO_read1_impl(bytesio *self, PyObject *size);
_io_BytesIO_read1_impl(bytesio *self, Py_ssize_t size);
static PyObject *
_io_BytesIO_read1(bytesio *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *return_value = NULL;
PyObject *size = Py_None;
Py_ssize_t size = -1;
if (!_PyArg_UnpackStack(args, nargs, "read1",
0, 1,
&size)) {
if (!_PyArg_ParseStack(args, nargs, "|O&:read1",
_PyIO_ConvertSsize_t, &size)) {
goto exit;
}
@ -221,7 +219,7 @@ exit:
}
PyDoc_STRVAR(_io_BytesIO_readline__doc__,
"readline($self, size=None, /)\n"
"readline($self, size=-1, /)\n"
"--\n"
"\n"
"Next line from the file, as a bytes object.\n"
@ -234,24 +232,23 @@ PyDoc_STRVAR(_io_BytesIO_readline__doc__,
{"readline", (PyCFunction)_io_BytesIO_readline, METH_FASTCALL, _io_BytesIO_readline__doc__},
static PyObject *
_io_BytesIO_readline_impl(bytesio *self, PyObject *arg);
_io_BytesIO_readline_impl(bytesio *self, Py_ssize_t size);
static PyObject *
_io_BytesIO_readline(bytesio *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *return_value = NULL;
PyObject *arg = Py_None;
Py_ssize_t size = -1;
if (!_PyArg_UnpackStack(args, nargs, "readline",
0, 1,
&arg)) {
if (!_PyArg_ParseStack(args, nargs, "|O&:readline",
_PyIO_ConvertSsize_t, &size)) {
goto exit;
}
if (!_PyArg_NoStackKeywords("readline", kwnames)) {
goto exit;
}
return_value = _io_BytesIO_readline_impl(self, arg);
return_value = _io_BytesIO_readline_impl(self, size);
exit:
return return_value;
@ -472,4 +469,4 @@ _io_BytesIO___init__(PyObject *self, PyObject *args, PyObject *kwargs)
exit:
return return_value;
}
/*[clinic end generated code: output=138ee6ad6951bc84 input=a9049054013a1b77]*/
/*[clinic end generated code: output=74a856733a5d55b0 input=a9049054013a1b77]*/

28
Modules/_io/clinic/stringio.c.h
View File

@ -39,7 +39,7 @@ _io_StringIO_tell(stringio *self, PyObject *Py_UNUSED(ignored))
}
PyDoc_STRVAR(_io_StringIO_read__doc__,
"read($self, size=None, /)\n"
"read($self, size=-1, /)\n"
"--\n"
"\n"
"Read at most size characters, returned as a string.\n"
@ -51,31 +51,30 @@ PyDoc_STRVAR(_io_StringIO_read__doc__,
{"read", (PyCFunction)_io_StringIO_read, METH_FASTCALL, _io_StringIO_read__doc__},
static PyObject *
_io_StringIO_read_impl(stringio *self, PyObject *arg);
_io_StringIO_read_impl(stringio *self, Py_ssize_t size);
static PyObject *
_io_StringIO_read(stringio *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *return_value = NULL;
PyObject *arg = Py_None;
Py_ssize_t size = -1;
if (!_PyArg_UnpackStack(args, nargs, "read",
0, 1,
&arg)) {
if (!_PyArg_ParseStack(args, nargs, "|O&:read",
_PyIO_ConvertSsize_t, &size)) {
goto exit;
}
if (!_PyArg_NoStackKeywords("read", kwnames)) {
goto exit;
}
return_value = _io_StringIO_read_impl(self, arg);
return_value = _io_StringIO_read_impl(self, size);
exit:
return return_value;
}
PyDoc_STRVAR(_io_StringIO_readline__doc__,
"readline($self, size=None, /)\n"
"readline($self, size=-1, /)\n"
"--\n"
"\n"
"Read until newline or EOF.\n"
@ -86,24 +85,23 @@ PyDoc_STRVAR(_io_StringIO_readline__doc__,
{"readline", (PyCFunction)_io_StringIO_readline, METH_FASTCALL, _io_StringIO_readline__doc__},
static PyObject *
_io_StringIO_readline_impl(stringio *self, PyObject *arg);
_io_StringIO_readline_impl(stringio *self, Py_ssize_t size);
static PyObject *
_io_StringIO_readline(stringio *self, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *return_value = NULL;
PyObject *arg = Py_None;
Py_ssize_t size = -1;
if (!_PyArg_UnpackStack(args, nargs, "readline",
0, 1,
&arg)) {
if (!_PyArg_ParseStack(args, nargs, "|O&:readline",
_PyIO_ConvertSsize_t, &size)) {
goto exit;
}
if (!_PyArg_NoStackKeywords("readline", kwnames)) {
goto exit;
}
return_value = _io_StringIO_readline_impl(self, arg);
return_value = _io_StringIO_readline_impl(self, size);
exit:
return return_value;
@ -305,4 +303,4 @@ _io_StringIO_seekable(stringio *self, PyObject *Py_UNUSED(ignored))
{
return _io_StringIO_seekable_impl(self);
}
/*[clinic end generated code: output=ce8018ec29def422 input=a9049054013a1b77]*/
/*[clinic end generated code: output=965fe9cb0d11511a input=a9049054013a1b77]*/

50
Modules/_io/stringio.c
View File

@ -17,6 +17,13 @@ class _io.StringIO "stringio *" "&PyStringIO_Type"
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=c17bc0f42165cd7d]*/
/*[python input]
class io_ssize_t_converter(CConverter):
type = 'Py_ssize_t'
converter = '_PyIO_ConvertSsize_t'
[python start generated code]*/
/*[python end generated code: output=da39a3ee5e6b4b0d input=d0a811d3cbfd1b33]*/
typedef struct {
PyObject_HEAD
Py_UCS4 *buf;
@ -301,7 +308,7 @@ _io_StringIO_tell_impl(stringio *self)
/*[clinic input]
_io.StringIO.read
size as arg: object = None
size: io_ssize_t = -1
/
Read at most size characters, returned as a string.
@ -311,30 +318,15 @@ is reached. Return an empty string at EOF.
[clinic start generated code]*/
static PyObject *
_io_StringIO_read_impl(stringio *self, PyObject *arg)
/*[clinic end generated code: output=3676864773746f68 input=9a319015f6f3965c]*/
_io_StringIO_read_impl(stringio *self, Py_ssize_t size)
/*[clinic end generated code: output=ae8cf6002f71626c input=bbd84248eb4ab957]*/
{
Py_ssize_t size, n;
Py_ssize_t n;
Py_UCS4 *output;
CHECK_INITIALIZED(self);
CHECK_CLOSED(self);
if (PyNumber_Check(arg)) {
size = PyNumber_AsSsize_t(arg, PyExc_OverflowError);
if (size == -1 && PyErr_Occurred())
return NULL;
}
else if (arg == Py_None) {
/* Read until EOF is reached, by default. */
size = -1;
}
else {
PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",
Py_TYPE(arg)->tp_name);
return NULL;
}
/* adjust invalid sizes */
n = self->string_size - self->pos;
if (size < 0 || size > n) {
@ -388,7 +380,7 @@ _stringio_readline(stringio *self, Py_ssize_t limit)
/*[clinic input]
_io.StringIO.readline
size as arg: object = None
size: io_ssize_t = -1
/
Read until newline or EOF.
@ -397,26 +389,14 @@ Returns an empty string if EOF is hit immediately.
[clinic start generated code]*/
static PyObject *
_io_StringIO_readline_impl(stringio *self, PyObject *arg)
/*[clinic end generated code: output=99fdcac03a3dee81 input=e0e0ed4042040176]*/
_io_StringIO_readline_impl(stringio *self, Py_ssize_t size)
/*[clinic end generated code: output=cabd6452f1b7e85d input=04de7535f732cb3d]*/
{
Py_ssize_t limit = -1;
CHECK_INITIALIZED(self);
CHECK_CLOSED(self);
ENSURE_REALIZED(self);
if (PyNumber_Check(arg)) {
limit = PyNumber_AsSsize_t(arg, PyExc_OverflowError);
if (limit == -1 && PyErr_Occurred())
return NULL;
}
else if (arg != Py_None) {
PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",
Py_TYPE(arg)->tp_name);
return NULL;
}
return _stringio_readline(self, limit);
return _stringio_readline(self, size);
}
static PyObject *