+++ /dev/null
-#include "Python.h"\r
-#include "structmember.h" /* for offsetof() */\r
-#include "_iomodule.h"\r
-\r
-typedef struct {\r
- PyObject_HEAD\r
- char *buf;\r
- Py_ssize_t pos;\r
- Py_ssize_t string_size;\r
- size_t buf_size;\r
- PyObject *dict;\r
- PyObject *weakreflist;\r
-} bytesio;\r
-\r
-#define CHECK_CLOSED(self) \\r
- if ((self)->buf == NULL) { \\r
- PyErr_SetString(PyExc_ValueError, \\r
- "I/O operation on closed file."); \\r
- return NULL; \\r
- }\r
-\r
-/* Internal routine to get a line from the buffer of a BytesIO\r
- object. Returns the length between the current position to the\r
- next newline character. */\r
-static Py_ssize_t\r
-get_line(bytesio *self, char **output)\r
-{\r
- char *n;\r
- const char *str_end;\r
- Py_ssize_t len;\r
-\r
- assert(self->buf != NULL);\r
-\r
- /* Move to the end of the line, up to the end of the string, s. */\r
- str_end = self->buf + self->string_size;\r
- for (n = self->buf + self->pos;\r
- n < str_end && *n != '\n';\r
- n++);\r
-\r
- /* Skip the newline character */\r
- if (n < str_end)\r
- n++;\r
-\r
- /* Get the length from the current position to the end of the line. */\r
- len = n - (self->buf + self->pos);\r
- *output = self->buf + self->pos;\r
-\r
- assert(len >= 0);\r
- assert(self->pos < PY_SSIZE_T_MAX - len);\r
- self->pos += len;\r
-\r
- return len;\r
-}\r
-\r
-/* Internal routine for changing the size of the buffer of BytesIO objects.\r
- The caller should ensure that the 'size' argument is non-negative. Returns\r
- 0 on success, -1 otherwise. */\r
-static int\r
-resize_buffer(bytesio *self, size_t size)\r
-{\r
- /* Here, unsigned types are used to avoid dealing with signed integer\r
- overflow, which is undefined in C. */\r
- size_t alloc = self->buf_size;\r
- char *new_buf = NULL;\r
-\r
- assert(self->buf != NULL);\r
-\r
- /* For simplicity, stay in the range of the signed type. Anyway, Python\r
- doesn't allow strings to be longer than this. */\r
- if (size > PY_SSIZE_T_MAX)\r
- goto overflow;\r
-\r
- if (size < alloc / 2) {\r
- /* Major downsize; resize down to exact size. */\r
- alloc = size + 1;\r
- }\r
- else if (size < alloc) {\r
- /* Within allocated size; quick exit */\r
- return 0;\r
- }\r
- else if (size <= alloc * 1.125) {\r
- /* Moderate upsize; overallocate similar to list_resize() */\r
- alloc = size + (size >> 3) + (size < 9 ? 3 : 6);\r
- }\r
- else {\r
- /* Major upsize; resize up to exact size */\r
- alloc = size + 1;\r
- }\r
-\r
- if (alloc > ((size_t)-1) / sizeof(char))\r
- goto overflow;\r
- new_buf = (char *)PyMem_Realloc(self->buf, alloc * sizeof(char));\r
- if (new_buf == NULL) {\r
- PyErr_NoMemory();\r
- return -1;\r
- }\r
- self->buf_size = alloc;\r
- self->buf = new_buf;\r
-\r
- return 0;\r
-\r
- overflow:\r
- PyErr_SetString(PyExc_OverflowError,\r
- "new buffer size too large");\r
- return -1;\r
-}\r
-\r
-/* Internal routine for writing a string of bytes to the buffer of a BytesIO\r
- object. Returns the number of bytes written, or -1 on error. */\r
-static Py_ssize_t\r
-write_bytes(bytesio *self, const char *bytes, Py_ssize_t len)\r
-{\r
- assert(self->buf != NULL);\r
- assert(self->pos >= 0);\r
- assert(len >= 0);\r
-\r
- if ((size_t)self->pos + len > self->buf_size) {\r
- if (resize_buffer(self, (size_t)self->pos + len) < 0)\r
- return -1;\r
- }\r
-\r
- if (self->pos > self->string_size) {\r
- /* In case of overseek, pad with null bytes the buffer region between\r
- the end of stream and the current position.\r
-\r
- 0 lo string_size hi\r
- | |<---used--->|<----------available----------->|\r
- | | <--to pad-->|<---to write---> |\r
- 0 buf position\r
- */\r
- memset(self->buf + self->string_size, '\0',\r
- (self->pos - self->string_size) * sizeof(char));\r
- }\r
-\r
- /* Copy the data to the internal buffer, overwriting some of the existing\r
- data if self->pos < self->string_size. */\r
- memcpy(self->buf + self->pos, bytes, len);\r
- self->pos += len;\r
-\r
- /* Set the new length of the internal string if it has changed. */\r
- if (self->string_size < self->pos) {\r
- self->string_size = self->pos;\r
- }\r
-\r
- return len;\r
-}\r
-\r
-static PyObject *\r
-bytesio_get_closed(bytesio *self)\r
-{\r
- if (self->buf == NULL) {\r
- Py_RETURN_TRUE;\r
- }\r
- else {\r
- Py_RETURN_FALSE;\r
- }\r
-}\r
-\r
-PyDoc_STRVAR(readable_doc,\r
-"readable() -> bool. Returns True if the IO object can be read.");\r
-\r
-PyDoc_STRVAR(writable_doc,\r
-"writable() -> bool. Returns True if the IO object can be written.");\r
-\r
-PyDoc_STRVAR(seekable_doc,\r
-"seekable() -> bool. Returns True if the IO object can be seeked.");\r
-\r
-/* Generic getter for the writable, readable and seekable properties */\r
-static PyObject *\r
-return_not_closed(bytesio *self)\r
-{\r
- CHECK_CLOSED(self);\r
- Py_RETURN_TRUE;\r
-}\r
-\r
-PyDoc_STRVAR(flush_doc,\r
-"flush() -> None. Does nothing.");\r
-\r
-static PyObject *\r
-bytesio_flush(bytesio *self)\r
-{\r
- CHECK_CLOSED(self);\r
- Py_RETURN_NONE;\r
-}\r
-\r
-PyDoc_STRVAR(getval_doc,\r
-"getvalue() -> bytes.\n"\r
-"\n"\r
-"Retrieve the entire contents of the BytesIO object.");\r
-\r
-static PyObject *\r
-bytesio_getvalue(bytesio *self)\r
-{\r
- CHECK_CLOSED(self);\r
- return PyBytes_FromStringAndSize(self->buf, self->string_size);\r
-}\r
-\r
-PyDoc_STRVAR(isatty_doc,\r
-"isatty() -> False.\n"\r
-"\n"\r
-"Always returns False since BytesIO objects are not connected\n"\r
-"to a tty-like device.");\r
-\r
-static PyObject *\r
-bytesio_isatty(bytesio *self)\r
-{\r
- CHECK_CLOSED(self);\r
- Py_RETURN_FALSE;\r
-}\r
-\r
-PyDoc_STRVAR(tell_doc,\r
-"tell() -> current file position, an integer\n");\r
-\r
-static PyObject *\r
-bytesio_tell(bytesio *self)\r
-{\r
- CHECK_CLOSED(self);\r
- return PyLong_FromSsize_t(self->pos);\r
-}\r
-\r
-PyDoc_STRVAR(read_doc,\r
-"read([size]) -> read at most size bytes, returned as a string.\n"\r
-"\n"\r
-"If the size argument is negative, read until EOF is reached.\n"\r
-"Return an empty string at EOF.");\r
-\r
-static PyObject *\r
-bytesio_read(bytesio *self, PyObject *args)\r
-{\r
- Py_ssize_t size, n;\r
- char *output;\r
- PyObject *arg = Py_None;\r
-\r
- CHECK_CLOSED(self);\r
-\r
- if (!PyArg_ParseTuple(args, "|O:read", &arg))\r
- return NULL;\r
-\r
- if (PyNumber_Check(arg)) {\r
- size = PyNumber_AsSsize_t(arg, PyExc_OverflowError);\r
- if (size == -1 && PyErr_Occurred())\r
- return NULL;\r
- }\r
- else if (arg == Py_None) {\r
- /* Read until EOF is reached, by default. */\r
- size = -1;\r
- }\r
- else {\r
- PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",\r
- Py_TYPE(arg)->tp_name);\r
- return NULL;\r
- }\r
-\r
- /* adjust invalid sizes */\r
- n = self->string_size - self->pos;\r
- if (size < 0 || size > n) {\r
- size = n;\r
- if (size < 0)\r
- size = 0;\r
- }\r
-\r
- assert(self->buf != NULL);\r
- output = self->buf + self->pos;\r
- self->pos += size;\r
-\r
- return PyBytes_FromStringAndSize(output, size);\r
-}\r
-\r
-\r
-PyDoc_STRVAR(read1_doc,\r
-"read1(size) -> read at most size bytes, returned as a string.\n"\r
-"\n"\r
-"If the size argument is negative or omitted, read until EOF is reached.\n"\r
-"Return an empty string at EOF.");\r
-\r
-static PyObject *\r
-bytesio_read1(bytesio *self, PyObject *n)\r
-{\r
- PyObject *arg, *res;\r
-\r
- arg = PyTuple_Pack(1, n);\r
- if (arg == NULL)\r
- return NULL;\r
- res = bytesio_read(self, arg);\r
- Py_DECREF(arg);\r
- return res;\r
-}\r
-\r
-PyDoc_STRVAR(readline_doc,\r
-"readline([size]) -> next line from the file, as a string.\n"\r
-"\n"\r
-"Retain newline. A non-negative size argument limits the maximum\n"\r
-"number of bytes to return (an incomplete line may be returned then).\n"\r
-"Return an empty string at EOF.\n");\r
-\r
-static PyObject *\r
-bytesio_readline(bytesio *self, PyObject *args)\r
-{\r
- Py_ssize_t size, n;\r
- char *output;\r
- PyObject *arg = Py_None;\r
-\r
- CHECK_CLOSED(self);\r
-\r
- if (!PyArg_ParseTuple(args, "|O:readline", &arg))\r
- return NULL;\r
-\r
- if (PyNumber_Check(arg)) {\r
- size = PyNumber_AsSsize_t(arg, PyExc_OverflowError);\r
- if (size == -1 && PyErr_Occurred())\r
- return NULL;\r
- }\r
- else if (arg == Py_None) {\r
- /* No size limit, by default. */\r
- size = -1;\r
- }\r
- else {\r
- PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",\r
- Py_TYPE(arg)->tp_name);\r
- return NULL;\r
- }\r
-\r
- n = get_line(self, &output);\r
-\r
- if (size >= 0 && size < n) {\r
- size = n - size;\r
- n -= size;\r
- self->pos -= size;\r
- }\r
-\r
- return PyBytes_FromStringAndSize(output, n);\r
-}\r
-\r
-PyDoc_STRVAR(readlines_doc,\r
-"readlines([size]) -> list of strings, each a line from the file.\n"\r
-"\n"\r
-"Call readline() repeatedly and return a list of the lines so read.\n"\r
-"The optional size argument, if given, is an approximate bound on the\n"\r
-"total number of bytes in the lines returned.\n");\r
-\r
-static PyObject *\r
-bytesio_readlines(bytesio *self, PyObject *args)\r
-{\r
- Py_ssize_t maxsize, size, n;\r
- PyObject *result, *line;\r
- char *output;\r
- PyObject *arg = Py_None;\r
-\r
- CHECK_CLOSED(self);\r
-\r
- if (!PyArg_ParseTuple(args, "|O:readlines", &arg))\r
- return NULL;\r
-\r
- if (PyNumber_Check(arg)) {\r
- maxsize = PyNumber_AsSsize_t(arg, PyExc_OverflowError);\r
- if (maxsize == -1 && PyErr_Occurred())\r
- return NULL;\r
- }\r
- else if (arg == Py_None) {\r
- /* No size limit, by default. */\r
- maxsize = -1;\r
- }\r
- else {\r
- PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",\r
- Py_TYPE(arg)->tp_name);\r
- return NULL;\r
- }\r
-\r
- size = 0;\r
- result = PyList_New(0);\r
- if (!result)\r
- return NULL;\r
-\r
- while ((n = get_line(self, &output)) != 0) {\r
- line = PyBytes_FromStringAndSize(output, n);\r
- if (!line)\r
- goto on_error;\r
- if (PyList_Append(result, line) == -1) {\r
- Py_DECREF(line);\r
- goto on_error;\r
- }\r
- Py_DECREF(line);\r
- size += n;\r
- if (maxsize > 0 && size >= maxsize)\r
- break;\r
- }\r
- return result;\r
-\r
- on_error:\r
- Py_DECREF(result);\r
- return NULL;\r
-}\r
-\r
-PyDoc_STRVAR(readinto_doc,\r
-"readinto(bytearray) -> int. Read up to len(b) bytes into b.\n"\r
-"\n"\r
-"Returns number of bytes read (0 for EOF), or None if the object\n"\r
-"is set not to block as has no data to read.");\r
-\r
-static PyObject *\r
-bytesio_readinto(bytesio *self, PyObject *args)\r
-{\r
- Py_buffer buf;\r
- Py_ssize_t len, n;\r
-\r
- CHECK_CLOSED(self);\r
-\r
- if (!PyArg_ParseTuple(args, "w*", &buf))\r
- return NULL;\r
-\r
- len = buf.len;\r
- /* adjust invalid sizes */\r
- n = self->string_size - self->pos;\r
- if (len > n) {\r
- len = n;\r
- if (len < 0)\r
- len = 0;\r
- }\r
-\r
- memcpy(buf.buf, self->buf + self->pos, len);\r
- assert(self->pos + len < PY_SSIZE_T_MAX);\r
- assert(len >= 0);\r
- self->pos += len;\r
-\r
- PyBuffer_Release(&buf);\r
- return PyLong_FromSsize_t(len);\r
-}\r
-\r
-PyDoc_STRVAR(truncate_doc,\r
-"truncate([size]) -> int. Truncate the file to at most size bytes.\n"\r
-"\n"\r
-"Size defaults to the current file position, as returned by tell().\n"\r
-"The current file position is unchanged. Returns the new size.\n");\r
-\r
-static PyObject *\r
-bytesio_truncate(bytesio *self, PyObject *args)\r
-{\r
- Py_ssize_t size;\r
- PyObject *arg = Py_None;\r
-\r
- CHECK_CLOSED(self);\r
-\r
- if (!PyArg_ParseTuple(args, "|O:truncate", &arg))\r
- return NULL;\r
-\r
- if (PyNumber_Check(arg)) {\r
- size = PyNumber_AsSsize_t(arg, PyExc_OverflowError);\r
- if (size == -1 && PyErr_Occurred())\r
- return NULL;\r
- }\r
- else if (arg == Py_None) {\r
- /* Truncate to current position if no argument is passed. */\r
- size = self->pos;\r
- }\r
- else {\r
- PyErr_Format(PyExc_TypeError, "integer argument expected, got '%s'",\r
- Py_TYPE(arg)->tp_name);\r
- return NULL;\r
- }\r
-\r
- if (size < 0) {\r
- PyErr_Format(PyExc_ValueError,\r
- "negative size value %zd", size);\r
- return NULL;\r
- }\r
-\r
- if (size < self->string_size) {\r
- self->string_size = size;\r
- if (resize_buffer(self, size) < 0)\r
- return NULL;\r
- }\r
-\r
- return PyLong_FromSsize_t(size);\r
-}\r
-\r
-static PyObject *\r
-bytesio_iternext(bytesio *self)\r
-{\r
- char *next;\r
- Py_ssize_t n;\r
-\r
- CHECK_CLOSED(self);\r
-\r
- n = get_line(self, &next);\r
-\r
- if (!next || n == 0)\r
- return NULL;\r
-\r
- return PyBytes_FromStringAndSize(next, n);\r
-}\r
-\r
-PyDoc_STRVAR(seek_doc,\r
-"seek(pos, whence=0) -> int. Change stream position.\n"\r
-"\n"\r
-"Seek to byte offset pos relative to position indicated by whence:\n"\r
-" 0 Start of stream (the default). pos should be >= 0;\n"\r
-" 1 Current position - pos may be negative;\n"\r
-" 2 End of stream - pos usually negative.\n"\r
-"Returns the new absolute position.");\r
-\r
-static PyObject *\r
-bytesio_seek(bytesio *self, PyObject *args)\r
-{\r
- PyObject *posobj;\r
- Py_ssize_t pos;\r
- int mode = 0;\r
-\r
- CHECK_CLOSED(self);\r
-\r
- if (!PyArg_ParseTuple(args, "O|i:seek", &posobj, &mode))\r
- return NULL;\r
-\r
- pos = PyNumber_AsSsize_t(posobj, PyExc_OverflowError);\r
- if (pos == -1 && PyErr_Occurred())\r
- return NULL;\r
- \r
- if (pos < 0 && mode == 0) {\r
- PyErr_Format(PyExc_ValueError,\r
- "negative seek value %zd", pos);\r
- return NULL;\r
- }\r
-\r
- /* mode 0: offset relative to beginning of the string.\r
- mode 1: offset relative to current position.\r
- mode 2: offset relative the end of the string. */\r
- if (mode == 1) {\r
- if (pos > PY_SSIZE_T_MAX - self->pos) {\r
- PyErr_SetString(PyExc_OverflowError,\r
- "new position too large");\r
- return NULL;\r
- }\r
- pos += self->pos;\r
- }\r
- else if (mode == 2) {\r
- if (pos > PY_SSIZE_T_MAX - self->string_size) {\r
- PyErr_SetString(PyExc_OverflowError,\r
- "new position too large");\r
- return NULL;\r
- }\r
- pos += self->string_size;\r
- }\r
- else if (mode != 0) {\r
- PyErr_Format(PyExc_ValueError,\r
- "invalid whence (%i, should be 0, 1 or 2)", mode);\r
- return NULL;\r
- }\r
-\r
- if (pos < 0)\r
- pos = 0;\r
- self->pos = pos;\r
-\r
- return PyLong_FromSsize_t(self->pos);\r
-}\r
-\r
-PyDoc_STRVAR(write_doc,\r
-"write(bytes) -> int. Write bytes to file.\n"\r
-"\n"\r
-"Return the number of bytes written.");\r
-\r
-static PyObject *\r
-bytesio_write(bytesio *self, PyObject *obj)\r
-{\r
- Py_ssize_t n = 0;\r
- Py_buffer buf;\r
- PyObject *result = NULL;\r
-\r
- CHECK_CLOSED(self);\r
-\r
- if (PyObject_GetBuffer(obj, &buf, PyBUF_CONTIG_RO) < 0)\r
- return NULL;\r
-\r
- if (buf.len != 0)\r
- n = write_bytes(self, buf.buf, buf.len);\r
- if (n >= 0)\r
- result = PyLong_FromSsize_t(n);\r
-\r
- PyBuffer_Release(&buf);\r
- return result;\r
-}\r
-\r
-PyDoc_STRVAR(writelines_doc,\r
-"writelines(sequence_of_strings) -> None. Write strings to the file.\n"\r
-"\n"\r
-"Note that newlines are not added. The sequence can be any iterable\n"\r
-"object producing strings. This is equivalent to calling write() for\n"\r
-"each string.");\r
-\r
-static PyObject *\r
-bytesio_writelines(bytesio *self, PyObject *v)\r
-{\r
- PyObject *it, *item;\r
- PyObject *ret;\r
-\r
- CHECK_CLOSED(self);\r
-\r
- it = PyObject_GetIter(v);\r
- if (it == NULL)\r
- return NULL;\r
-\r
- while ((item = PyIter_Next(it)) != NULL) {\r
- ret = bytesio_write(self, item);\r
- Py_DECREF(item);\r
- if (ret == NULL) {\r
- Py_DECREF(it);\r
- return NULL;\r
- }\r
- Py_DECREF(ret);\r
- }\r
- Py_DECREF(it);\r
-\r
- /* See if PyIter_Next failed */\r
- if (PyErr_Occurred())\r
- return NULL;\r
-\r
- Py_RETURN_NONE;\r
-}\r
-\r
-PyDoc_STRVAR(close_doc,\r
-"close() -> None. Disable all I/O operations.");\r
-\r
-static PyObject *\r
-bytesio_close(bytesio *self)\r
-{\r
- if (self->buf != NULL) {\r
- PyMem_Free(self->buf);\r
- self->buf = NULL;\r
- }\r
- Py_RETURN_NONE;\r
-}\r
-\r
-/* Pickling support.\r
-\r
- Note that only pickle protocol 2 and onward are supported since we use\r
- extended __reduce__ API of PEP 307 to make BytesIO instances picklable.\r
-\r
- Providing support for protocol < 2 would require the __reduce_ex__ method\r
- which is notably long-winded when defined properly.\r
-\r
- For BytesIO, the implementation would similar to one coded for\r
- object.__reduce_ex__, but slightly less general. To be more specific, we\r
- could call bytesio_getstate directly and avoid checking for the presence of\r
- a fallback __reduce__ method. However, we would still need a __newobj__\r
- function to use the efficient instance representation of PEP 307.\r
- */\r
-\r
-static PyObject *\r
-bytesio_getstate(bytesio *self)\r
-{\r
- PyObject *initvalue = bytesio_getvalue(self);\r
- PyObject *dict;\r
- PyObject *state;\r
-\r
- if (initvalue == NULL)\r
- return NULL;\r
- if (self->dict == NULL) {\r
- Py_INCREF(Py_None);\r
- dict = Py_None;\r
- }\r
- else {\r
- dict = PyDict_Copy(self->dict);\r
- if (dict == NULL)\r
- return NULL;\r
- }\r
-\r
- state = Py_BuildValue("(OnN)", initvalue, self->pos, dict);\r
- Py_DECREF(initvalue);\r
- return state;\r
-}\r
-\r
-static PyObject *\r
-bytesio_setstate(bytesio *self, PyObject *state)\r
-{\r
- PyObject *result;\r
- PyObject *position_obj;\r
- PyObject *dict;\r
- Py_ssize_t pos;\r
-\r
- assert(state != NULL);\r
-\r
- /* We allow the state tuple to be longer than 3, because we may need\r
- someday to extend the object's state without breaking\r
- backward-compatibility. */\r
- if (!PyTuple_Check(state) || Py_SIZE(state) < 3) {\r
- PyErr_Format(PyExc_TypeError,\r
- "%.200s.__setstate__ argument should be 3-tuple, got %.200s",\r
- Py_TYPE(self)->tp_name, Py_TYPE(state)->tp_name);\r
- return NULL;\r
- }\r
- /* Reset the object to its default state. This is only needed to handle\r
- the case of repeated calls to __setstate__. */\r
- self->string_size = 0;\r
- self->pos = 0;\r
-\r
- /* Set the value of the internal buffer. If state[0] does not support the\r
- buffer protocol, bytesio_write will raise the appropriate TypeError. */\r
- result = bytesio_write(self, PyTuple_GET_ITEM(state, 0));\r
- if (result == NULL)\r
- return NULL;\r
- Py_DECREF(result);\r
-\r
- /* Set carefully the position value. Alternatively, we could use the seek\r
- method instead of modifying self->pos directly to better protect the\r
- object internal state against errneous (or malicious) inputs. */\r
- position_obj = PyTuple_GET_ITEM(state, 1);\r
- if (!PyIndex_Check(position_obj)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "second item of state must be an integer, not %.200s",\r
- Py_TYPE(position_obj)->tp_name);\r
- return NULL;\r
- }\r
- pos = PyNumber_AsSsize_t(position_obj, PyExc_OverflowError);\r
- if (pos == -1 && PyErr_Occurred())\r
- return NULL;\r
- if (pos < 0) {\r
- PyErr_SetString(PyExc_ValueError,\r
- "position value cannot be negative");\r
- return NULL;\r
- }\r
- self->pos = pos;\r
-\r
- /* Set the dictionary of the instance variables. */\r
- dict = PyTuple_GET_ITEM(state, 2);\r
- if (dict != Py_None) {\r
- if (!PyDict_Check(dict)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "third item of state should be a dict, got a %.200s",\r
- Py_TYPE(dict)->tp_name);\r
- return NULL;\r
- }\r
- if (self->dict) {\r
- /* Alternatively, we could replace the internal dictionary\r
- completely. However, it seems more practical to just update it. */\r
- if (PyDict_Update(self->dict, dict) < 0)\r
- return NULL;\r
- }\r
- else {\r
- Py_INCREF(dict);\r
- self->dict = dict;\r
- }\r
- }\r
-\r
- Py_RETURN_NONE;\r
-}\r
-\r
-static void\r
-bytesio_dealloc(bytesio *self)\r
-{\r
- _PyObject_GC_UNTRACK(self);\r
- if (self->buf != NULL) {\r
- PyMem_Free(self->buf);\r
- self->buf = NULL;\r
- }\r
- Py_CLEAR(self->dict);\r
- if (self->weakreflist != NULL)\r
- PyObject_ClearWeakRefs((PyObject *) self);\r
- Py_TYPE(self)->tp_free(self);\r
-}\r
-\r
-static PyObject *\r
-bytesio_new(PyTypeObject *type, PyObject *args, PyObject *kwds)\r
-{\r
- bytesio *self;\r
-\r
- assert(type != NULL && type->tp_alloc != NULL);\r
- self = (bytesio *)type->tp_alloc(type, 0);\r
- if (self == NULL)\r
- return NULL;\r
-\r
- /* tp_alloc initializes all the fields to zero. So we don't have to\r
- initialize them here. */\r
-\r
- self->buf = (char *)PyMem_Malloc(0);\r
- if (self->buf == NULL) {\r
- Py_DECREF(self);\r
- return PyErr_NoMemory();\r
- }\r
-\r
- return (PyObject *)self;\r
-}\r
-\r
-static int\r
-bytesio_init(bytesio *self, PyObject *args, PyObject *kwds)\r
-{\r
- char *kwlist[] = {"initial_bytes", NULL};\r
- PyObject *initvalue = NULL;\r
-\r
- if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:BytesIO", kwlist,\r
- &initvalue))\r
- return -1;\r
-\r
- /* In case, __init__ is called multiple times. */\r
- self->string_size = 0;\r
- self->pos = 0;\r
-\r
- if (initvalue && initvalue != Py_None) {\r
- PyObject *res;\r
- res = bytesio_write(self, initvalue);\r
- if (res == NULL)\r
- return -1;\r
- Py_DECREF(res);\r
- self->pos = 0;\r
- }\r
-\r
- return 0;\r
-}\r
-\r
-static PyObject *\r
-bytesio_sizeof(bytesio *self, void *unused)\r
-{\r
- Py_ssize_t res;\r
-\r
- res = sizeof(bytesio);\r
- if (self->buf)\r
- res += self->buf_size;\r
- return PyLong_FromSsize_t(res);\r
-}\r
-\r
-static int\r
-bytesio_traverse(bytesio *self, visitproc visit, void *arg)\r
-{\r
- Py_VISIT(self->dict);\r
- return 0;\r
-}\r
-\r
-static int\r
-bytesio_clear(bytesio *self)\r
-{\r
- Py_CLEAR(self->dict);\r
- return 0;\r
-}\r
-\r
-\r
-static PyGetSetDef bytesio_getsetlist[] = {\r
- {"closed", (getter)bytesio_get_closed, NULL,\r
- "True if the file is closed."},\r
- {NULL}, /* sentinel */\r
-};\r
-\r
-static struct PyMethodDef bytesio_methods[] = {\r
- {"readable", (PyCFunction)return_not_closed, METH_NOARGS, readable_doc},\r
- {"seekable", (PyCFunction)return_not_closed, METH_NOARGS, seekable_doc},\r
- {"writable", (PyCFunction)return_not_closed, METH_NOARGS, writable_doc},\r
- {"close", (PyCFunction)bytesio_close, METH_NOARGS, close_doc},\r
- {"flush", (PyCFunction)bytesio_flush, METH_NOARGS, flush_doc},\r
- {"isatty", (PyCFunction)bytesio_isatty, METH_NOARGS, isatty_doc},\r
- {"tell", (PyCFunction)bytesio_tell, METH_NOARGS, tell_doc},\r
- {"write", (PyCFunction)bytesio_write, METH_O, write_doc},\r
- {"writelines", (PyCFunction)bytesio_writelines, METH_O, writelines_doc},\r
- {"read1", (PyCFunction)bytesio_read1, METH_O, read1_doc},\r
- {"readinto", (PyCFunction)bytesio_readinto, METH_VARARGS, readinto_doc},\r
- {"readline", (PyCFunction)bytesio_readline, METH_VARARGS, readline_doc},\r
- {"readlines", (PyCFunction)bytesio_readlines, METH_VARARGS, readlines_doc},\r
- {"read", (PyCFunction)bytesio_read, METH_VARARGS, read_doc},\r
- {"getvalue", (PyCFunction)bytesio_getvalue, METH_NOARGS, getval_doc},\r
- {"seek", (PyCFunction)bytesio_seek, METH_VARARGS, seek_doc},\r
- {"truncate", (PyCFunction)bytesio_truncate, METH_VARARGS, truncate_doc},\r
- {"__getstate__", (PyCFunction)bytesio_getstate, METH_NOARGS, NULL},\r
- {"__setstate__", (PyCFunction)bytesio_setstate, METH_O, NULL},\r
- {"__sizeof__", (PyCFunction)bytesio_sizeof, METH_NOARGS, NULL},\r
- {NULL, NULL} /* sentinel */\r
-};\r
-\r
-PyDoc_STRVAR(bytesio_doc,\r
-"BytesIO([buffer]) -> object\n"\r
-"\n"\r
-"Create a buffered I/O implementation using an in-memory bytes\n"\r
-"buffer, ready for reading and writing.");\r
-\r
-PyTypeObject PyBytesIO_Type = {\r
- PyVarObject_HEAD_INIT(NULL, 0)\r
- "_io.BytesIO", /*tp_name*/\r
- sizeof(bytesio), /*tp_basicsize*/\r
- 0, /*tp_itemsize*/\r
- (destructor)bytesio_dealloc, /*tp_dealloc*/\r
- 0, /*tp_print*/\r
- 0, /*tp_getattr*/\r
- 0, /*tp_setattr*/\r
- 0, /*tp_reserved*/\r
- 0, /*tp_repr*/\r
- 0, /*tp_as_number*/\r
- 0, /*tp_as_sequence*/\r
- 0, /*tp_as_mapping*/\r
- 0, /*tp_hash*/\r
- 0, /*tp_call*/\r
- 0, /*tp_str*/\r
- 0, /*tp_getattro*/\r
- 0, /*tp_setattro*/\r
- 0, /*tp_as_buffer*/\r
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |\r
- Py_TPFLAGS_HAVE_GC, /*tp_flags*/\r
- bytesio_doc, /*tp_doc*/\r
- (traverseproc)bytesio_traverse, /*tp_traverse*/\r
- (inquiry)bytesio_clear, /*tp_clear*/\r
- 0, /*tp_richcompare*/\r
- offsetof(bytesio, weakreflist), /*tp_weaklistoffset*/\r
- PyObject_SelfIter, /*tp_iter*/\r
- (iternextfunc)bytesio_iternext, /*tp_iternext*/\r
- bytesio_methods, /*tp_methods*/\r
- 0, /*tp_members*/\r
- bytesio_getsetlist, /*tp_getset*/\r
- 0, /*tp_base*/\r
- 0, /*tp_dict*/\r
- 0, /*tp_descr_get*/\r
- 0, /*tp_descr_set*/\r
- offsetof(bytesio, dict), /*tp_dictoffset*/\r
- (initproc)bytesio_init, /*tp_init*/\r
- 0, /*tp_alloc*/\r
- bytesio_new, /*tp_new*/\r
-};\r
projects / mirror_edk2.git / blobdiff