--- /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