| /* |
| An implementation of Buffered I/O as defined by PEP 3116 - "New I/O" |
| |
| Classes defined here: BufferedIOBase, BufferedReader, BufferedWriter, |
| BufferedRandom. |
| |
| Written by Amaury Forgeot d'Arc and Antoine Pitrou |
| */ |
| |
| #define PY_SSIZE_T_CLEAN |
| #include "Python.h" |
| #include "structmember.h" |
| #include "pythread.h" |
| #include "_iomodule.h" |
| |
| /* |
| * BufferedIOBase class, inherits from IOBase. |
| */ |
| PyDoc_STRVAR(bufferediobase_doc, |
| "Base class for buffered IO objects.\n" |
| "\n" |
| "The main difference with RawIOBase is that the read() method\n" |
| "supports omitting the size argument, and does not have a default\n" |
| "implementation that defers to readinto().\n" |
| "\n" |
| "In addition, read(), readinto() and write() may raise\n" |
| "BlockingIOError if the underlying raw stream is in non-blocking\n" |
| "mode and not ready; unlike their raw counterparts, they will never\n" |
| "return None.\n" |
| "\n" |
| "A typical implementation should not inherit from a RawIOBase\n" |
| "implementation, but wrap one.\n" |
| ); |
| |
| static PyObject * |
| bufferediobase_readinto(PyObject *self, PyObject *args) |
| { |
| Py_buffer buf; |
| Py_ssize_t len; |
| PyObject *data; |
| |
| if (!PyArg_ParseTuple(args, "w*:readinto", &buf)) { |
| return NULL; |
| } |
| |
| data = PyObject_CallMethod(self, "read", "n", buf.len); |
| if (data == NULL) |
| goto error; |
| |
| if (!PyBytes_Check(data)) { |
| Py_DECREF(data); |
| PyErr_SetString(PyExc_TypeError, "read() should return bytes"); |
| goto error; |
| } |
| |
| len = Py_SIZE(data); |
| memcpy(buf.buf, PyBytes_AS_STRING(data), len); |
| |
| PyBuffer_Release(&buf); |
| Py_DECREF(data); |
| |
| return PyLong_FromSsize_t(len); |
| |
| error: |
| PyBuffer_Release(&buf); |
| return NULL; |
| } |
| |
| static PyObject * |
| bufferediobase_unsupported(const char *message) |
| { |
| PyErr_SetString(IO_STATE->unsupported_operation, message); |
| return NULL; |
| } |
| |
| PyDoc_STRVAR(bufferediobase_detach_doc, |
| "Disconnect this buffer from its underlying raw stream and return it.\n" |
| "\n" |
| "After the raw stream has been detached, the buffer is in an unusable\n" |
| "state.\n"); |
| |
| static PyObject * |
| bufferediobase_detach(PyObject *self) |
| { |
| return bufferediobase_unsupported("detach"); |
| } |
| |
| PyDoc_STRVAR(bufferediobase_read_doc, |
| "Read and return up to n bytes.\n" |
| "\n" |
| "If the argument is omitted, None, or negative, reads and\n" |
| "returns all data until EOF.\n" |
| "\n" |
| "If the argument is positive, and the underlying raw stream is\n" |
| "not 'interactive', multiple raw reads may be issued to satisfy\n" |
| "the byte count (unless EOF is reached first). But for\n" |
| "interactive raw streams (as well as sockets and pipes), at most\n" |
| "one raw read will be issued, and a short result does not imply\n" |
| "that EOF is imminent.\n" |
| "\n" |
| "Returns an empty bytes object on EOF.\n" |
| "\n" |
| "Returns None if the underlying raw stream was open in non-blocking\n" |
| "mode and no data is available at the moment.\n"); |
| |
| static PyObject * |
| bufferediobase_read(PyObject *self, PyObject *args) |
| { |
| return bufferediobase_unsupported("read"); |
| } |
| |
| PyDoc_STRVAR(bufferediobase_read1_doc, |
| "Read and return up to n bytes, with at most one read() call\n" |
| "to the underlying raw stream. A short result does not imply\n" |
| "that EOF is imminent.\n" |
| "\n" |
| "Returns an empty bytes object on EOF.\n"); |
| |
| static PyObject * |
| bufferediobase_read1(PyObject *self, PyObject *args) |
| { |
| return bufferediobase_unsupported("read1"); |
| } |
| |
| PyDoc_STRVAR(bufferediobase_write_doc, |
| "Write the given buffer to the IO stream.\n" |
| "\n" |
| "Returns the number of bytes written, which is never less than\n" |
| "len(b).\n" |
| "\n" |
| "Raises BlockingIOError if the buffer is full and the\n" |
| "underlying raw stream cannot accept more data at the moment.\n"); |
| |
| static PyObject * |
| bufferediobase_write(PyObject *self, PyObject *args) |
| { |
| return bufferediobase_unsupported("write"); |
| } |
| |
| |
| static PyMethodDef bufferediobase_methods[] = { |
| {"detach", (PyCFunction)bufferediobase_detach, METH_NOARGS, bufferediobase_detach_doc}, |
| {"read", bufferediobase_read, METH_VARARGS, bufferediobase_read_doc}, |
| {"read1", bufferediobase_read1, METH_VARARGS, bufferediobase_read1_doc}, |
| {"readinto", bufferediobase_readinto, METH_VARARGS, NULL}, |
| {"write", bufferediobase_write, METH_VARARGS, bufferediobase_write_doc}, |
| {NULL, NULL} |
| }; |
| |
| PyTypeObject PyBufferedIOBase_Type = { |
| PyVarObject_HEAD_INIT(NULL, 0) |
| "_io._BufferedIOBase", /*tp_name*/ |
| 0, /*tp_basicsize*/ |
| 0, /*tp_itemsize*/ |
| 0, /*tp_dealloc*/ |
| 0, /*tp_print*/ |
| 0, /*tp_getattr*/ |
| 0, /*tp_setattr*/ |
| 0, /*tp_compare */ |
| 0, /*tp_repr*/ |
| 0, /*tp_as_number*/ |
| 0, /*tp_as_sequence*/ |
| 0, /*tp_as_mapping*/ |
| 0, /*tp_hash */ |
| 0, /*tp_call*/ |
| 0, /*tp_str*/ |
| 0, /*tp_getattro*/ |
| 0, /*tp_setattro*/ |
| 0, /*tp_as_buffer*/ |
| Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/ |
| bufferediobase_doc, /* tp_doc */ |
| 0, /* tp_traverse */ |
| 0, /* tp_clear */ |
| 0, /* tp_richcompare */ |
| 0, /* tp_weaklistoffset */ |
| 0, /* tp_iter */ |
| 0, /* tp_iternext */ |
| bufferediobase_methods, /* tp_methods */ |
| 0, /* tp_members */ |
| 0, /* tp_getset */ |
| &PyIOBase_Type, /* tp_base */ |
| 0, /* tp_dict */ |
| 0, /* tp_descr_get */ |
| 0, /* tp_descr_set */ |
| 0, /* tp_dictoffset */ |
| 0, /* tp_init */ |
| 0, /* tp_alloc */ |
| 0, /* tp_new */ |
| }; |
| |
| |
| typedef struct { |
| PyObject_HEAD |
| |
| PyObject *raw; |
| int ok; /* Initialized? */ |
| int detached; |
| int readable; |
| int writable; |
| int deallocating; |
| |
| /* True if this is a vanilla Buffered object (rather than a user derived |
| class) *and* the raw stream is a vanilla FileIO object. */ |
| int fast_closed_checks; |
| |
| /* Absolute position inside the raw stream (-1 if unknown). */ |
| Py_off_t abs_pos; |
| |
| /* A static buffer of size `buffer_size` */ |
| char *buffer; |
| /* Current logical position in the buffer. */ |
| Py_off_t pos; |
| /* Position of the raw stream in the buffer. */ |
| Py_off_t raw_pos; |
| |
| /* Just after the last buffered byte in the buffer, or -1 if the buffer |
| isn't ready for reading. */ |
| Py_off_t read_end; |
| |
| /* Just after the last byte actually written */ |
| Py_off_t write_pos; |
| /* Just after the last byte waiting to be written, or -1 if the buffer |
| isn't ready for writing. */ |
| Py_off_t write_end; |
| |
| #ifdef WITH_THREAD |
| PyThread_type_lock lock; |
| volatile long owner; |
| #endif |
| |
| Py_ssize_t buffer_size; |
| Py_ssize_t buffer_mask; |
| |
| PyObject *dict; |
| PyObject *weakreflist; |
| } buffered; |
| |
| /* |
| Implementation notes: |
| |
| * BufferedReader, BufferedWriter and BufferedRandom try to share most |
| methods (this is helped by the members `readable` and `writable`, which |
| are initialized in the respective constructors) |
| * They also share a single buffer for reading and writing. This enables |
| interleaved reads and writes without flushing. It also makes the logic |
| a bit trickier to get right. |
| * The absolute position of the raw stream is cached, if possible, in the |
| `abs_pos` member. It must be updated every time an operation is done |
| on the raw stream. If not sure, it can be reinitialized by calling |
| _buffered_raw_tell(), which queries the raw stream (_buffered_raw_seek() |
| also does it). To read it, use RAW_TELL(). |
| * Three helpers, _bufferedreader_raw_read, _bufferedwriter_raw_write and |
| _bufferedwriter_flush_unlocked do a lot of useful housekeeping. |
| |
| NOTE: we should try to maintain block alignment of reads and writes to the |
| raw stream (according to the buffer size), but for now it is only done |
| in read() and friends. |
| |
| */ |
| |
| /* These macros protect the buffered object against concurrent operations. */ |
| |
| #ifdef WITH_THREAD |
| |
| static int |
| _enter_buffered_busy(buffered *self) |
| { |
| if (self->owner == PyThread_get_thread_ident()) { |
| PyErr_Format(PyExc_RuntimeError, |
| "reentrant call inside %R", self); |
| return 0; |
| } |
| Py_BEGIN_ALLOW_THREADS |
| PyThread_acquire_lock(self->lock, 1); |
| Py_END_ALLOW_THREADS |
| return 1; |
| } |
| |
| #define ENTER_BUFFERED(self) \ |
| ( (PyThread_acquire_lock(self->lock, 0) ? \ |
| 1 : _enter_buffered_busy(self)) \ |
| && (self->owner = PyThread_get_thread_ident(), 1) ) |
| |
| #define LEAVE_BUFFERED(self) \ |
| do { \ |
| self->owner = 0; \ |
| PyThread_release_lock(self->lock); \ |
| } while(0); |
| |
| #else |
| #define ENTER_BUFFERED(self) 1 |
| #define LEAVE_BUFFERED(self) |
| #endif |
| |
| #define CHECK_INITIALIZED(self) \ |
| if (self->ok <= 0) { \ |
| if (self->detached) { \ |
| PyErr_SetString(PyExc_ValueError, \ |
| "raw stream has been detached"); \ |
| } else { \ |
| PyErr_SetString(PyExc_ValueError, \ |
| "I/O operation on uninitialized object"); \ |
| } \ |
| return NULL; \ |
| } |
| |
| #define CHECK_INITIALIZED_INT(self) \ |
| if (self->ok <= 0) { \ |
| if (self->detached) { \ |
| PyErr_SetString(PyExc_ValueError, \ |
| "raw stream has been detached"); \ |
| } else { \ |
| PyErr_SetString(PyExc_ValueError, \ |
| "I/O operation on uninitialized object"); \ |
| } \ |
| return -1; \ |
| } |
| |
| #define IS_CLOSED(self) \ |
| (self->fast_closed_checks \ |
| ? _PyFileIO_closed(self->raw) \ |
| : buffered_closed(self)) |
| |
| #define CHECK_CLOSED(self, error_msg) \ |
| if (IS_CLOSED(self)) { \ |
| PyErr_SetString(PyExc_ValueError, error_msg); \ |
| return NULL; \ |
| } |
| |
| |
| #define VALID_READ_BUFFER(self) \ |
| (self->readable && self->read_end != -1) |
| |
| #define VALID_WRITE_BUFFER(self) \ |
| (self->writable && self->write_end != -1) |
| |
| #define ADJUST_POSITION(self, _new_pos) \ |
| do { \ |
| self->pos = _new_pos; \ |
| if (VALID_READ_BUFFER(self) && self->read_end < self->pos) \ |
| self->read_end = self->pos; \ |
| } while(0) |
| |
| #define READAHEAD(self) \ |
| ((self->readable && VALID_READ_BUFFER(self)) \ |
| ? (self->read_end - self->pos) : 0) |
| |
| #define RAW_OFFSET(self) \ |
| (((VALID_READ_BUFFER(self) || VALID_WRITE_BUFFER(self)) \ |
| && self->raw_pos >= 0) ? self->raw_pos - self->pos : 0) |
| |
| #define RAW_TELL(self) \ |
| (self->abs_pos != -1 ? self->abs_pos : _buffered_raw_tell(self)) |
| |
| #define MINUS_LAST_BLOCK(self, size) \ |
| (self->buffer_mask ? \ |
| (size & ~self->buffer_mask) : \ |
| (self->buffer_size * (size / self->buffer_size))) |
| |
| |
| static void |
| buffered_dealloc(buffered *self) |
| { |
| self->deallocating = 1; |
| if (self->ok && _PyIOBase_finalize((PyObject *) self) < 0) |
| return; |
| _PyObject_GC_UNTRACK(self); |
| self->ok = 0; |
| if (self->weakreflist != NULL) |
| PyObject_ClearWeakRefs((PyObject *)self); |
| Py_CLEAR(self->raw); |
| if (self->buffer) { |
| PyMem_Free(self->buffer); |
| self->buffer = NULL; |
| } |
| #ifdef WITH_THREAD |
| if (self->lock) { |
| PyThread_free_lock(self->lock); |
| self->lock = NULL; |
| } |
| #endif |
| Py_CLEAR(self->dict); |
| Py_TYPE(self)->tp_free((PyObject *)self); |
| } |
| |
| static int |
| buffered_traverse(buffered *self, visitproc visit, void *arg) |
| { |
| Py_VISIT(self->raw); |
| Py_VISIT(self->dict); |
| return 0; |
| } |
| |
| static int |
| buffered_clear(buffered *self) |
| { |
| if (self->ok && _PyIOBase_finalize((PyObject *) self) < 0) |
| return -1; |
| self->ok = 0; |
| Py_CLEAR(self->raw); |
| Py_CLEAR(self->dict); |
| return 0; |
| } |
| |
| /* Because this can call arbitrary code, it shouldn't be called when |
| the refcount is 0 (that is, not directly from tp_dealloc unless |
| the refcount has been temporarily re-incremented). */ |
| static PyObject * |
| buffered_dealloc_warn(buffered *self, PyObject *source) |
| { |
| if (self->ok && self->raw) { |
| PyObject *r; |
| r = PyObject_CallMethod(self->raw, "_dealloc_warn", "O", source); |
| if (r) |
| Py_DECREF(r); |
| else |
| PyErr_Clear(); |
| } |
| Py_RETURN_NONE; |
| } |
| |
| /* |
| * _BufferedIOMixin methods |
| * This is not a class, just a collection of methods that will be reused |
| * by BufferedReader and BufferedWriter |
| */ |
| |
| /* Flush and close */ |
| |
| static PyObject * |
| buffered_simple_flush(buffered *self, PyObject *args) |
| { |
| CHECK_INITIALIZED(self) |
| return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_flush, NULL); |
| } |
| |
| static int |
| buffered_closed(buffered *self) |
| { |
| int closed; |
| PyObject *res; |
| CHECK_INITIALIZED_INT(self) |
| res = PyObject_GetAttr(self->raw, _PyIO_str_closed); |
| if (res == NULL) |
| return -1; |
| closed = PyObject_IsTrue(res); |
| Py_DECREF(res); |
| return closed; |
| } |
| |
| static PyObject * |
| buffered_closed_get(buffered *self, void *context) |
| { |
| CHECK_INITIALIZED(self) |
| return PyObject_GetAttr(self->raw, _PyIO_str_closed); |
| } |
| |
| static PyObject * |
| buffered_close(buffered *self, PyObject *args) |
| { |
| PyObject *res = NULL; |
| int r; |
| |
| CHECK_INITIALIZED(self) |
| if (!ENTER_BUFFERED(self)) |
| return NULL; |
| |
| r = buffered_closed(self); |
| if (r < 0) |
| goto end; |
| if (r > 0) { |
| res = Py_None; |
| Py_INCREF(res); |
| goto end; |
| } |
| |
| if (self->deallocating) { |
| PyObject *r = buffered_dealloc_warn(self, (PyObject *) self); |
| if (r) |
| Py_DECREF(r); |
| else |
| PyErr_Clear(); |
| } |
| /* flush() will most probably re-take the lock, so drop it first */ |
| LEAVE_BUFFERED(self) |
| res = PyObject_CallMethodObjArgs((PyObject *)self, _PyIO_str_flush, NULL); |
| if (!ENTER_BUFFERED(self)) |
| return NULL; |
| if (res == NULL) { |
| goto end; |
| } |
| Py_XDECREF(res); |
| |
| res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_close, NULL); |
| |
| end: |
| LEAVE_BUFFERED(self) |
| return res; |
| } |
| |
| /* detach */ |
| |
| static PyObject * |
| buffered_detach(buffered *self, PyObject *args) |
| { |
| PyObject *raw, *res; |
| CHECK_INITIALIZED(self) |
| res = PyObject_CallMethodObjArgs((PyObject *)self, _PyIO_str_flush, NULL); |
| if (res == NULL) |
| return NULL; |
| Py_DECREF(res); |
| raw = self->raw; |
| self->raw = NULL; |
| self->detached = 1; |
| self->ok = 0; |
| return raw; |
| } |
| |
| /* Inquiries */ |
| |
| static PyObject * |
| buffered_seekable(buffered *self, PyObject *args) |
| { |
| CHECK_INITIALIZED(self) |
| return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_seekable, NULL); |
| } |
| |
| static PyObject * |
| buffered_readable(buffered *self, PyObject *args) |
| { |
| CHECK_INITIALIZED(self) |
| return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_readable, NULL); |
| } |
| |
| static PyObject * |
| buffered_writable(buffered *self, PyObject *args) |
| { |
| CHECK_INITIALIZED(self) |
| return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_writable, NULL); |
| } |
| |
| static PyObject * |
| buffered_name_get(buffered *self, void *context) |
| { |
| CHECK_INITIALIZED(self) |
| return PyObject_GetAttrString(self->raw, "name"); |
| } |
| |
| static PyObject * |
| buffered_mode_get(buffered *self, void *context) |
| { |
| CHECK_INITIALIZED(self) |
| return PyObject_GetAttrString(self->raw, "mode"); |
| } |
| |
| /* Lower-level APIs */ |
| |
| static PyObject * |
| buffered_fileno(buffered *self, PyObject *args) |
| { |
| CHECK_INITIALIZED(self) |
| return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_fileno, NULL); |
| } |
| |
| static PyObject * |
| buffered_isatty(buffered *self, PyObject *args) |
| { |
| CHECK_INITIALIZED(self) |
| return PyObject_CallMethodObjArgs(self->raw, _PyIO_str_isatty, NULL); |
| } |
| |
| /* Serialization */ |
| |
| static PyObject * |
| buffered_getstate(buffered *self, PyObject *args) |
| { |
| PyErr_Format(PyExc_TypeError, |
| "cannot serialize '%s' object", Py_TYPE(self)->tp_name); |
| return NULL; |
| } |
| |
| /* Forward decls */ |
| static PyObject * |
| _bufferedwriter_flush_unlocked(buffered *, int); |
| static Py_ssize_t |
| _bufferedreader_fill_buffer(buffered *self); |
| static void |
| _bufferedreader_reset_buf(buffered *self); |
| static void |
| _bufferedwriter_reset_buf(buffered *self); |
| static PyObject * |
| _bufferedreader_peek_unlocked(buffered *self, Py_ssize_t); |
| static PyObject * |
| _bufferedreader_read_all(buffered *self); |
| static PyObject * |
| _bufferedreader_read_fast(buffered *self, Py_ssize_t); |
| static PyObject * |
| _bufferedreader_read_generic(buffered *self, Py_ssize_t); |
| |
| |
| /* |
| * Helpers |
| */ |
| |
| /* Returns the address of the `written` member if a BlockingIOError was |
| raised, NULL otherwise. The error is always re-raised. */ |
| static Py_ssize_t * |
| _buffered_check_blocking_error(void) |
| { |
| PyObject *t, *v, *tb; |
| PyBlockingIOErrorObject *err; |
| |
| PyErr_Fetch(&t, &v, &tb); |
| if (v == NULL || !PyErr_GivenExceptionMatches(v, PyExc_BlockingIOError)) { |
| PyErr_Restore(t, v, tb); |
| return NULL; |
| } |
| err = (PyBlockingIOErrorObject *) v; |
| /* TODO: sanity check (err->written >= 0) */ |
| PyErr_Restore(t, v, tb); |
| return &err->written; |
| } |
| |
| static Py_off_t |
| _buffered_raw_tell(buffered *self) |
| { |
| Py_off_t n; |
| PyObject *res; |
| res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_tell, NULL); |
| if (res == NULL) |
| return -1; |
| n = PyNumber_AsOff_t(res, PyExc_ValueError); |
| Py_DECREF(res); |
| if (n < 0) { |
| if (!PyErr_Occurred()) |
| PyErr_Format(PyExc_IOError, |
| "Raw stream returned invalid position %" PY_PRIdOFF, |
| (PY_OFF_T_COMPAT)n); |
| return -1; |
| } |
| self->abs_pos = n; |
| return n; |
| } |
| |
| static Py_off_t |
| _buffered_raw_seek(buffered *self, Py_off_t target, int whence) |
| { |
| PyObject *res, *posobj, *whenceobj; |
| Py_off_t n; |
| |
| posobj = PyLong_FromOff_t(target); |
| if (posobj == NULL) |
| return -1; |
| whenceobj = PyLong_FromLong(whence); |
| if (whenceobj == NULL) { |
| Py_DECREF(posobj); |
| return -1; |
| } |
| res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_seek, |
| posobj, whenceobj, NULL); |
| Py_DECREF(posobj); |
| Py_DECREF(whenceobj); |
| if (res == NULL) |
| return -1; |
| n = PyNumber_AsOff_t(res, PyExc_ValueError); |
| Py_DECREF(res); |
| if (n < 0) { |
| if (!PyErr_Occurred()) |
| PyErr_Format(PyExc_IOError, |
| "Raw stream returned invalid position %" PY_PRIdOFF, |
| (PY_OFF_T_COMPAT)n); |
| return -1; |
| } |
| self->abs_pos = n; |
| return n; |
| } |
| |
| static int |
| _buffered_init(buffered *self) |
| { |
| Py_ssize_t n; |
| if (self->buffer_size <= 0) { |
| PyErr_SetString(PyExc_ValueError, |
| "buffer size must be strictly positive"); |
| return -1; |
| } |
| if (self->buffer) |
| PyMem_Free(self->buffer); |
| self->buffer = PyMem_Malloc(self->buffer_size); |
| if (self->buffer == NULL) { |
| PyErr_NoMemory(); |
| return -1; |
| } |
| #ifdef WITH_THREAD |
| if (self->lock) |
| PyThread_free_lock(self->lock); |
| self->lock = PyThread_allocate_lock(); |
| if (self->lock == NULL) { |
| PyErr_SetString(PyExc_RuntimeError, "can't allocate read lock"); |
| return -1; |
| } |
| self->owner = 0; |
| #endif |
| /* Find out whether buffer_size is a power of 2 */ |
| /* XXX is this optimization useful? */ |
| for (n = self->buffer_size - 1; n & 1; n >>= 1) |
| ; |
| if (n == 0) |
| self->buffer_mask = self->buffer_size - 1; |
| else |
| self->buffer_mask = 0; |
| if (_buffered_raw_tell(self) == -1) |
| PyErr_Clear(); |
| return 0; |
| } |
| |
| /* Return 1 if an EnvironmentError with errno == EINTR is set (and then |
| clears the error indicator), 0 otherwise. |
| Should only be called when PyErr_Occurred() is true. |
| */ |
| static int |
| _trap_eintr(void) |
| { |
| static PyObject *eintr_int = NULL; |
| PyObject *typ, *val, *tb; |
| PyEnvironmentErrorObject *env_err; |
| |
| if (eintr_int == NULL) { |
| eintr_int = PyLong_FromLong(EINTR); |
| assert(eintr_int != NULL); |
| } |
| if (!PyErr_ExceptionMatches(PyExc_EnvironmentError)) |
| return 0; |
| PyErr_Fetch(&typ, &val, &tb); |
| PyErr_NormalizeException(&typ, &val, &tb); |
| env_err = (PyEnvironmentErrorObject *) val; |
| assert(env_err != NULL); |
| if (env_err->myerrno != NULL && |
| PyObject_RichCompareBool(env_err->myerrno, eintr_int, Py_EQ) > 0) { |
| Py_DECREF(typ); |
| Py_DECREF(val); |
| Py_XDECREF(tb); |
| return 1; |
| } |
| /* This silences any error set by PyObject_RichCompareBool() */ |
| PyErr_Restore(typ, val, tb); |
| return 0; |
| } |
| |
| /* |
| * Shared methods and wrappers |
| */ |
| |
| static PyObject * |
| buffered_flush_and_rewind_unlocked(buffered *self) |
| { |
| PyObject *res; |
| |
| res = _bufferedwriter_flush_unlocked(self, 0); |
| if (res == NULL) |
| return NULL; |
| Py_DECREF(res); |
| |
| if (self->readable) { |
| /* Rewind the raw stream so that its position corresponds to |
| the current logical position. */ |
| Py_off_t n; |
| n = _buffered_raw_seek(self, -RAW_OFFSET(self), 1); |
| _bufferedreader_reset_buf(self); |
| if (n == -1) |
| return NULL; |
| } |
| Py_RETURN_NONE; |
| } |
| |
| static PyObject * |
| buffered_flush(buffered *self, PyObject *args) |
| { |
| PyObject *res; |
| |
| CHECK_INITIALIZED(self) |
| CHECK_CLOSED(self, "flush of closed file") |
| |
| if (!ENTER_BUFFERED(self)) |
| return NULL; |
| res = buffered_flush_and_rewind_unlocked(self); |
| LEAVE_BUFFERED(self) |
| |
| return res; |
| } |
| |
| static PyObject * |
| buffered_peek(buffered *self, PyObject *args) |
| { |
| Py_ssize_t n = 0; |
| PyObject *res = NULL; |
| |
| CHECK_INITIALIZED(self) |
| if (!PyArg_ParseTuple(args, "|n:peek", &n)) { |
| return NULL; |
| } |
| |
| if (!ENTER_BUFFERED(self)) |
| return NULL; |
| |
| if (self->writable) { |
| res = buffered_flush_and_rewind_unlocked(self); |
| if (res == NULL) |
| goto end; |
| Py_CLEAR(res); |
| } |
| res = _bufferedreader_peek_unlocked(self, n); |
| |
| end: |
| LEAVE_BUFFERED(self) |
| return res; |
| } |
| |
| static PyObject * |
| buffered_read(buffered *self, PyObject *args) |
| { |
| Py_ssize_t n = -1; |
| PyObject *res; |
| |
| CHECK_INITIALIZED(self) |
| if (!PyArg_ParseTuple(args, "|O&:read", &_PyIO_ConvertSsize_t, &n)) { |
| return NULL; |
| } |
| if (n < -1) { |
| PyErr_SetString(PyExc_ValueError, |
| "read length must be positive or -1"); |
| return NULL; |
| } |
| |
| CHECK_CLOSED(self, "read of closed file") |
| |
| if (n == -1) { |
| /* The number of bytes is unspecified, read until the end of stream */ |
| if (!ENTER_BUFFERED(self)) |
| return NULL; |
| res = _bufferedreader_read_all(self); |
| } |
| else { |
| res = _bufferedreader_read_fast(self, n); |
| if (res != Py_None) |
| return res; |
| Py_DECREF(res); |
| if (!ENTER_BUFFERED(self)) |
| return NULL; |
| res = _bufferedreader_read_generic(self, n); |
| } |
| |
| LEAVE_BUFFERED(self) |
| return res; |
| } |
| |
| static PyObject * |
| buffered_read1(buffered *self, PyObject *args) |
| { |
| Py_ssize_t n, have, r; |
| PyObject *res = NULL; |
| |
| CHECK_INITIALIZED(self) |
| if (!PyArg_ParseTuple(args, "n:read1", &n)) { |
| return NULL; |
| } |
| |
| if (n < 0) { |
| PyErr_SetString(PyExc_ValueError, |
| "read length must be positive"); |
| return NULL; |
| } |
| if (n == 0) |
| return PyBytes_FromStringAndSize(NULL, 0); |
| |
| if (!ENTER_BUFFERED(self)) |
| return NULL; |
| |
| /* Return up to n bytes. If at least one byte is buffered, we |
| only return buffered bytes. Otherwise, we do one raw read. */ |
| |
| /* XXX: this mimicks the io.py implementation but is probably wrong. |
| If we need to read from the raw stream, then we could actually read |
| all `n` bytes asked by the caller (and possibly more, so as to fill |
| our buffer for the next reads). */ |
| |
| have = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| if (have > 0) { |
| if (n > have) |
| n = have; |
| res = PyBytes_FromStringAndSize(self->buffer + self->pos, n); |
| if (res == NULL) |
| goto end; |
| self->pos += n; |
| goto end; |
| } |
| |
| if (self->writable) { |
| res = buffered_flush_and_rewind_unlocked(self); |
| if (res == NULL) |
| goto end; |
| Py_DECREF(res); |
| } |
| |
| /* Fill the buffer from the raw stream, and copy it to the result. */ |
| _bufferedreader_reset_buf(self); |
| r = _bufferedreader_fill_buffer(self); |
| if (r == -1) |
| goto end; |
| if (r == -2) |
| r = 0; |
| if (n > r) |
| n = r; |
| res = PyBytes_FromStringAndSize(self->buffer, n); |
| if (res == NULL) |
| goto end; |
| self->pos = n; |
| |
| end: |
| LEAVE_BUFFERED(self) |
| return res; |
| } |
| |
| static PyObject * |
| buffered_readinto(buffered *self, PyObject *args) |
| { |
| CHECK_INITIALIZED(self) |
| |
| /* TODO: use raw.readinto() (or a direct copy from our buffer) instead! */ |
| return bufferediobase_readinto((PyObject *)self, args); |
| } |
| |
| static PyObject * |
| _buffered_readline(buffered *self, Py_ssize_t limit) |
| { |
| PyObject *res = NULL; |
| PyObject *chunks = NULL; |
| Py_ssize_t n, written = 0; |
| const char *start, *s, *end; |
| |
| CHECK_CLOSED(self, "readline of closed file") |
| |
| /* First, try to find a line in the buffer. This can run unlocked because |
| the calls to the C API are simple enough that they can't trigger |
| any thread switch. */ |
| n = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| if (limit >= 0 && n > limit) |
| n = limit; |
| start = self->buffer + self->pos; |
| s = memchr(start, '\n', n); |
| if (s != NULL) { |
| res = PyBytes_FromStringAndSize(start, s - start + 1); |
| if (res != NULL) |
| self->pos += s - start + 1; |
| goto end_unlocked; |
| } |
| if (n == limit) { |
| res = PyBytes_FromStringAndSize(start, n); |
| if (res != NULL) |
| self->pos += n; |
| goto end_unlocked; |
| } |
| |
| if (!ENTER_BUFFERED(self)) |
| goto end_unlocked; |
| |
| /* Now we try to get some more from the raw stream */ |
| chunks = PyList_New(0); |
| if (chunks == NULL) |
| goto end; |
| if (n > 0) { |
| res = PyBytes_FromStringAndSize(start, n); |
| if (res == NULL) |
| goto end; |
| if (PyList_Append(chunks, res) < 0) { |
| Py_CLEAR(res); |
| goto end; |
| } |
| Py_CLEAR(res); |
| written += n; |
| self->pos += n; |
| if (limit >= 0) |
| limit -= n; |
| } |
| if (self->writable) { |
| PyObject *r = buffered_flush_and_rewind_unlocked(self); |
| if (r == NULL) |
| goto end; |
| Py_DECREF(r); |
| } |
| |
| for (;;) { |
| _bufferedreader_reset_buf(self); |
| n = _bufferedreader_fill_buffer(self); |
| if (n == -1) |
| goto end; |
| if (n <= 0) |
| break; |
| if (limit >= 0 && n > limit) |
| n = limit; |
| start = self->buffer; |
| end = start + n; |
| s = start; |
| while (s < end) { |
| if (*s++ == '\n') { |
| res = PyBytes_FromStringAndSize(start, s - start); |
| if (res == NULL) |
| goto end; |
| self->pos = s - start; |
| goto found; |
| } |
| } |
| res = PyBytes_FromStringAndSize(start, n); |
| if (res == NULL) |
| goto end; |
| if (n == limit) { |
| self->pos = n; |
| break; |
| } |
| if (PyList_Append(chunks, res) < 0) { |
| Py_CLEAR(res); |
| goto end; |
| } |
| Py_CLEAR(res); |
| written += n; |
| if (limit >= 0) |
| limit -= n; |
| } |
| found: |
| if (res != NULL && PyList_Append(chunks, res) < 0) { |
| Py_CLEAR(res); |
| goto end; |
| } |
| Py_CLEAR(res); |
| res = _PyBytes_Join(_PyIO_empty_bytes, chunks); |
| |
| end: |
| LEAVE_BUFFERED(self) |
| end_unlocked: |
| Py_XDECREF(chunks); |
| return res; |
| } |
| |
| static PyObject * |
| buffered_readline(buffered *self, PyObject *args) |
| { |
| Py_ssize_t limit = -1; |
| |
| CHECK_INITIALIZED(self) |
| if (!PyArg_ParseTuple(args, "|O&:readline", &_PyIO_ConvertSsize_t, &limit)) |
| return NULL; |
| return _buffered_readline(self, limit); |
| } |
| |
| |
| static PyObject * |
| buffered_tell(buffered *self, PyObject *args) |
| { |
| Py_off_t pos; |
| |
| CHECK_INITIALIZED(self) |
| pos = _buffered_raw_tell(self); |
| if (pos == -1) |
| return NULL; |
| pos -= RAW_OFFSET(self); |
| /* TODO: sanity check (pos >= 0) */ |
| return PyLong_FromOff_t(pos); |
| } |
| |
| static PyObject * |
| buffered_seek(buffered *self, PyObject *args) |
| { |
| Py_off_t target, n; |
| int whence = 0; |
| PyObject *targetobj, *res = NULL; |
| |
| CHECK_INITIALIZED(self) |
| if (!PyArg_ParseTuple(args, "O|i:seek", &targetobj, &whence)) { |
| return NULL; |
| } |
| if (whence < 0 || whence > 2) { |
| PyErr_Format(PyExc_ValueError, |
| "whence must be between 0 and 2, not %d", whence); |
| return NULL; |
| } |
| |
| CHECK_CLOSED(self, "seek of closed file") |
| |
| target = PyNumber_AsOff_t(targetobj, PyExc_ValueError); |
| if (target == -1 && PyErr_Occurred()) |
| return NULL; |
| |
| if (whence != 2 && self->readable) { |
| Py_off_t current, avail; |
| /* Check if seeking leaves us inside the current buffer, |
| so as to return quickly if possible. Also, we needn't take the |
| lock in this fast path. |
| Don't know how to do that when whence == 2, though. */ |
| /* NOTE: RAW_TELL() can release the GIL but the object is in a stable |
| state at this point. */ |
| current = RAW_TELL(self); |
| avail = READAHEAD(self); |
| if (avail > 0) { |
| Py_off_t offset; |
| if (whence == 0) |
| offset = target - (current - RAW_OFFSET(self)); |
| else |
| offset = target; |
| if (offset >= -self->pos && offset <= avail) { |
| self->pos += offset; |
| return PyLong_FromOff_t(current - avail + offset); |
| } |
| } |
| } |
| |
| if (!ENTER_BUFFERED(self)) |
| return NULL; |
| |
| /* Fallback: invoke raw seek() method and clear buffer */ |
| if (self->writable) { |
| res = _bufferedwriter_flush_unlocked(self, 0); |
| if (res == NULL) |
| goto end; |
| Py_CLEAR(res); |
| _bufferedwriter_reset_buf(self); |
| } |
| |
| /* TODO: align on block boundary and read buffer if needed? */ |
| if (whence == 1) |
| target -= RAW_OFFSET(self); |
| n = _buffered_raw_seek(self, target, whence); |
| if (n == -1) |
| goto end; |
| self->raw_pos = -1; |
| res = PyLong_FromOff_t(n); |
| if (res != NULL && self->readable) |
| _bufferedreader_reset_buf(self); |
| |
| end: |
| LEAVE_BUFFERED(self) |
| return res; |
| } |
| |
| static PyObject * |
| buffered_truncate(buffered *self, PyObject *args) |
| { |
| PyObject *pos = Py_None; |
| PyObject *res = NULL; |
| |
| CHECK_INITIALIZED(self) |
| if (!PyArg_ParseTuple(args, "|O:truncate", &pos)) { |
| return NULL; |
| } |
| |
| if (!ENTER_BUFFERED(self)) |
| return NULL; |
| |
| if (self->writable) { |
| res = buffered_flush_and_rewind_unlocked(self); |
| if (res == NULL) |
| goto end; |
| Py_CLEAR(res); |
| } |
| res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_truncate, pos, NULL); |
| if (res == NULL) |
| goto end; |
| /* Reset cached position */ |
| if (_buffered_raw_tell(self) == -1) |
| PyErr_Clear(); |
| |
| end: |
| LEAVE_BUFFERED(self) |
| return res; |
| } |
| |
| static PyObject * |
| buffered_iternext(buffered *self) |
| { |
| PyObject *line; |
| PyTypeObject *tp; |
| |
| CHECK_INITIALIZED(self); |
| |
| tp = Py_TYPE(self); |
| if (tp == &PyBufferedReader_Type || |
| tp == &PyBufferedRandom_Type) { |
| /* Skip method call overhead for speed */ |
| line = _buffered_readline(self, -1); |
| } |
| else { |
| line = PyObject_CallMethodObjArgs((PyObject *)self, |
| _PyIO_str_readline, NULL); |
| if (line && !PyBytes_Check(line)) { |
| PyErr_Format(PyExc_IOError, |
| "readline() should have returned a bytes object, " |
| "not '%.200s'", Py_TYPE(line)->tp_name); |
| Py_DECREF(line); |
| return NULL; |
| } |
| } |
| |
| if (line == NULL) |
| return NULL; |
| |
| if (PyBytes_GET_SIZE(line) == 0) { |
| /* Reached EOF or would have blocked */ |
| Py_DECREF(line); |
| return NULL; |
| } |
| |
| return line; |
| } |
| |
| static PyObject * |
| buffered_repr(buffered *self) |
| { |
| PyObject *nameobj, *res; |
| |
| nameobj = PyObject_GetAttrString((PyObject *) self, "name"); |
| if (nameobj == NULL) { |
| if (PyErr_ExceptionMatches(PyExc_AttributeError)) |
| PyErr_Clear(); |
| else |
| return NULL; |
| res = PyUnicode_FromFormat("<%s>", Py_TYPE(self)->tp_name); |
| } |
| else { |
| res = PyUnicode_FromFormat("<%s name=%R>", |
| Py_TYPE(self)->tp_name, nameobj); |
| Py_DECREF(nameobj); |
| } |
| return res; |
| } |
| |
| /* |
| * class BufferedReader |
| */ |
| |
| PyDoc_STRVAR(bufferedreader_doc, |
| "Create a new buffered reader using the given readable raw IO object."); |
| |
| static void _bufferedreader_reset_buf(buffered *self) |
| { |
| self->read_end = -1; |
| } |
| |
| static int |
| bufferedreader_init(buffered *self, PyObject *args, PyObject *kwds) |
| { |
| char *kwlist[] = {"raw", "buffer_size", NULL}; |
| Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE; |
| PyObject *raw; |
| |
| self->ok = 0; |
| self->detached = 0; |
| |
| if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|n:BufferedReader", kwlist, |
| &raw, &buffer_size)) { |
| return -1; |
| } |
| |
| if (_PyIOBase_check_readable(raw, Py_True) == NULL) |
| return -1; |
| |
| Py_CLEAR(self->raw); |
| Py_INCREF(raw); |
| self->raw = raw; |
| self->buffer_size = buffer_size; |
| self->readable = 1; |
| self->writable = 0; |
| |
| if (_buffered_init(self) < 0) |
| return -1; |
| _bufferedreader_reset_buf(self); |
| |
| self->fast_closed_checks = (Py_TYPE(self) == &PyBufferedReader_Type && |
| Py_TYPE(raw) == &PyFileIO_Type); |
| |
| self->ok = 1; |
| return 0; |
| } |
| |
| static Py_ssize_t |
| _bufferedreader_raw_read(buffered *self, char *start, Py_ssize_t len) |
| { |
| Py_buffer buf; |
| PyObject *memobj, *res; |
| Py_ssize_t n; |
| /* NOTE: the buffer needn't be released as its object is NULL. */ |
| if (PyBuffer_FillInfo(&buf, NULL, start, len, 0, PyBUF_CONTIG) == -1) |
| return -1; |
| memobj = PyMemoryView_FromBuffer(&buf); |
| if (memobj == NULL) |
| return -1; |
| /* NOTE: PyErr_SetFromErrno() calls PyErr_CheckSignals() when EINTR |
| occurs so we needn't do it ourselves. |
| We then retry reading, ignoring the signal if no handler has |
| raised (see issue #10956). |
| */ |
| do { |
| res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_readinto, memobj, NULL); |
| } while (res == NULL && _trap_eintr()); |
| Py_DECREF(memobj); |
| if (res == NULL) |
| return -1; |
| if (res == Py_None) { |
| /* Non-blocking stream would have blocked. Special return code! */ |
| Py_DECREF(res); |
| return -2; |
| } |
| n = PyNumber_AsSsize_t(res, PyExc_ValueError); |
| Py_DECREF(res); |
| if (n < 0 || n > len) { |
| PyErr_Format(PyExc_IOError, |
| "raw readinto() returned invalid length %zd " |
| "(should have been between 0 and %zd)", n, len); |
| return -1; |
| } |
| if (n > 0 && self->abs_pos != -1) |
| self->abs_pos += n; |
| return n; |
| } |
| |
| static Py_ssize_t |
| _bufferedreader_fill_buffer(buffered *self) |
| { |
| Py_ssize_t start, len, n; |
| if (VALID_READ_BUFFER(self)) |
| start = Py_SAFE_DOWNCAST(self->read_end, Py_off_t, Py_ssize_t); |
| else |
| start = 0; |
| len = self->buffer_size - start; |
| n = _bufferedreader_raw_read(self, self->buffer + start, len); |
| if (n <= 0) |
| return n; |
| self->read_end = start + n; |
| self->raw_pos = start + n; |
| return n; |
| } |
| |
| static PyObject * |
| _bufferedreader_read_all(buffered *self) |
| { |
| Py_ssize_t current_size; |
| PyObject *res, *data = NULL; |
| PyObject *chunks = PyList_New(0); |
| |
| if (chunks == NULL) |
| return NULL; |
| |
| /* First copy what we have in the current buffer. */ |
| current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| if (current_size) { |
| data = PyBytes_FromStringAndSize( |
| self->buffer + self->pos, current_size); |
| if (data == NULL) { |
| Py_DECREF(chunks); |
| return NULL; |
| } |
| self->pos += current_size; |
| } |
| /* We're going past the buffer's bounds, flush it */ |
| if (self->writable) { |
| res = buffered_flush_and_rewind_unlocked(self); |
| if (res == NULL) { |
| Py_DECREF(chunks); |
| return NULL; |
| } |
| Py_CLEAR(res); |
| } |
| _bufferedreader_reset_buf(self); |
| while (1) { |
| if (data) { |
| if (PyList_Append(chunks, data) < 0) { |
| Py_DECREF(data); |
| Py_DECREF(chunks); |
| return NULL; |
| } |
| Py_DECREF(data); |
| } |
| |
| /* Read until EOF or until read() would block. */ |
| data = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_read, NULL); |
| if (data == NULL) { |
| Py_DECREF(chunks); |
| return NULL; |
| } |
| if (data != Py_None && !PyBytes_Check(data)) { |
| Py_DECREF(data); |
| Py_DECREF(chunks); |
| PyErr_SetString(PyExc_TypeError, "read() should return bytes"); |
| return NULL; |
| } |
| if (data == Py_None || PyBytes_GET_SIZE(data) == 0) { |
| if (current_size == 0) { |
| Py_DECREF(chunks); |
| return data; |
| } |
| else { |
| res = _PyBytes_Join(_PyIO_empty_bytes, chunks); |
| Py_DECREF(data); |
| Py_DECREF(chunks); |
| return res; |
| } |
| } |
| current_size += PyBytes_GET_SIZE(data); |
| if (self->abs_pos != -1) |
| self->abs_pos += PyBytes_GET_SIZE(data); |
| } |
| } |
| |
| /* Read n bytes from the buffer if it can, otherwise return None. |
| This function is simple enough that it can run unlocked. */ |
| static PyObject * |
| _bufferedreader_read_fast(buffered *self, Py_ssize_t n) |
| { |
| Py_ssize_t current_size; |
| |
| current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| if (n <= current_size) { |
| /* Fast path: the data to read is fully buffered. */ |
| PyObject *res = PyBytes_FromStringAndSize(self->buffer + self->pos, n); |
| if (res != NULL) |
| self->pos += n; |
| return res; |
| } |
| Py_RETURN_NONE; |
| } |
| |
| /* Generic read function: read from the stream until enough bytes are read, |
| * or until an EOF occurs or until read() would block. |
| */ |
| static PyObject * |
| _bufferedreader_read_generic(buffered *self, Py_ssize_t n) |
| { |
| PyObject *res = NULL; |
| Py_ssize_t current_size, remaining, written; |
| char *out; |
| |
| current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| if (n <= current_size) |
| return _bufferedreader_read_fast(self, n); |
| |
| res = PyBytes_FromStringAndSize(NULL, n); |
| if (res == NULL) |
| goto error; |
| out = PyBytes_AS_STRING(res); |
| remaining = n; |
| written = 0; |
| if (current_size > 0) { |
| memcpy(out, self->buffer + self->pos, current_size); |
| remaining -= current_size; |
| written += current_size; |
| self->pos += current_size; |
| } |
| /* Flush the write buffer if necessary */ |
| if (self->writable) { |
| PyObject *r = buffered_flush_and_rewind_unlocked(self); |
| if (r == NULL) |
| goto error; |
| Py_DECREF(r); |
| } |
| _bufferedreader_reset_buf(self); |
| while (remaining > 0) { |
| /* We want to read a whole block at the end into buffer. |
| If we had readv() we could do this in one pass. */ |
| Py_ssize_t r = MINUS_LAST_BLOCK(self, remaining); |
| if (r == 0) |
| break; |
| r = _bufferedreader_raw_read(self, out + written, r); |
| if (r == -1) |
| goto error; |
| if (r == 0 || r == -2) { |
| /* EOF occurred or read() would block. */ |
| if (r == 0 || written > 0) { |
| if (_PyBytes_Resize(&res, written)) |
| goto error; |
| return res; |
| } |
| Py_DECREF(res); |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| remaining -= r; |
| written += r; |
| } |
| assert(remaining <= self->buffer_size); |
| self->pos = 0; |
| self->raw_pos = 0; |
| self->read_end = 0; |
| /* NOTE: when the read is satisfied, we avoid issuing any additional |
| reads, which could block indefinitely (e.g. on a socket). |
| See issue #9550. */ |
| while (remaining > 0 && self->read_end < self->buffer_size) { |
| Py_ssize_t r = _bufferedreader_fill_buffer(self); |
| if (r == -1) |
| goto error; |
| if (r == 0 || r == -2) { |
| /* EOF occurred or read() would block. */ |
| if (r == 0 || written > 0) { |
| if (_PyBytes_Resize(&res, written)) |
| goto error; |
| return res; |
| } |
| Py_DECREF(res); |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| if (remaining > r) { |
| memcpy(out + written, self->buffer + self->pos, r); |
| written += r; |
| self->pos += r; |
| remaining -= r; |
| } |
| else if (remaining > 0) { |
| memcpy(out + written, self->buffer + self->pos, remaining); |
| written += remaining; |
| self->pos += remaining; |
| remaining = 0; |
| } |
| if (remaining == 0) |
| break; |
| } |
| |
| return res; |
| |
| error: |
| Py_XDECREF(res); |
| return NULL; |
| } |
| |
| static PyObject * |
| _bufferedreader_peek_unlocked(buffered *self, Py_ssize_t n) |
| { |
| Py_ssize_t have, r; |
| |
| have = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t); |
| /* Constraints: |
| 1. we don't want to advance the file position. |
| 2. we don't want to lose block alignment, so we can't shift the buffer |
| to make some place. |
| Therefore, we either return `have` bytes (if > 0), or a full buffer. |
| */ |
| if (have > 0) { |
| return PyBytes_FromStringAndSize(self->buffer + self->pos, have); |
| } |
| |
| /* Fill the buffer from the raw stream, and copy it to the result. */ |
| _bufferedreader_reset_buf(self); |
| r = _bufferedreader_fill_buffer(self); |
| if (r == -1) |
| return NULL; |
| if (r == -2) |
| r = 0; |
| self->pos = 0; |
| return PyBytes_FromStringAndSize(self->buffer, r); |
| } |
| |
| static PyMethodDef bufferedreader_methods[] = { |
| /* BufferedIOMixin methods */ |
| {"detach", (PyCFunction)buffered_detach, METH_NOARGS}, |
| {"flush", (PyCFunction)buffered_simple_flush, METH_NOARGS}, |
| {"close", (PyCFunction)buffered_close, METH_NOARGS}, |
| {"seekable", (PyCFunction)buffered_seekable, METH_NOARGS}, |
| {"readable", (PyCFunction)buffered_readable, METH_NOARGS}, |
| {"writable", (PyCFunction)buffered_writable, METH_NOARGS}, |
| {"fileno", (PyCFunction)buffered_fileno, METH_NOARGS}, |
| {"isatty", (PyCFunction)buffered_isatty, METH_NOARGS}, |
| {"_dealloc_warn", (PyCFunction)buffered_dealloc_warn, METH_O}, |
| {"__getstate__", (PyCFunction)buffered_getstate, METH_NOARGS}, |
| |
| {"read", (PyCFunction)buffered_read, METH_VARARGS}, |
| {"peek", (PyCFunction)buffered_peek, METH_VARARGS}, |
| {"read1", (PyCFunction)buffered_read1, METH_VARARGS}, |
| {"readline", (PyCFunction)buffered_readline, METH_VARARGS}, |
| {"seek", (PyCFunction)buffered_seek, METH_VARARGS}, |
| {"tell", (PyCFunction)buffered_tell, METH_NOARGS}, |
| {"truncate", (PyCFunction)buffered_truncate, METH_VARARGS}, |
| {NULL, NULL} |
| }; |
| |
| static PyMemberDef bufferedreader_members[] = { |
| {"raw", T_OBJECT, offsetof(buffered, raw), READONLY}, |
| {NULL} |
| }; |
| |
| static PyGetSetDef bufferedreader_getset[] = { |
| {"closed", (getter)buffered_closed_get, NULL, NULL}, |
| {"name", (getter)buffered_name_get, NULL, NULL}, |
| {"mode", (getter)buffered_mode_get, NULL, NULL}, |
| {NULL} |
| }; |
| |
| |
| PyTypeObject PyBufferedReader_Type = { |
| PyVarObject_HEAD_INIT(NULL, 0) |
| "_io.BufferedReader", /*tp_name*/ |
| sizeof(buffered), /*tp_basicsize*/ |
| 0, /*tp_itemsize*/ |
| (destructor)buffered_dealloc, /*tp_dealloc*/ |
| 0, /*tp_print*/ |
| 0, /*tp_getattr*/ |
| 0, /*tp_setattr*/ |
| 0, /*tp_compare */ |
| (reprfunc)buffered_repr, /*tp_repr*/ |
| 0, /*tp_as_number*/ |
| 0, /*tp_as_sequence*/ |
| 0, /*tp_as_mapping*/ |
| 0, /*tp_hash */ |
| 0, /*tp_call*/ |
| 0, /*tp_str*/ |
| 0, /*tp_getattro*/ |
| 0, /*tp_setattro*/ |
| 0, /*tp_as_buffer*/ |
| Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
| | Py_TPFLAGS_HAVE_GC, /*tp_flags*/ |
| bufferedreader_doc, /* tp_doc */ |
| (traverseproc)buffered_traverse, /* tp_traverse */ |
| (inquiry)buffered_clear, /* tp_clear */ |
| 0, /* tp_richcompare */ |
| offsetof(buffered, weakreflist), /*tp_weaklistoffset*/ |
| 0, /* tp_iter */ |
| (iternextfunc)buffered_iternext, /* tp_iternext */ |
| bufferedreader_methods, /* tp_methods */ |
| bufferedreader_members, /* tp_members */ |
| bufferedreader_getset, /* tp_getset */ |
| 0, /* tp_base */ |
| 0, /* tp_dict */ |
| 0, /* tp_descr_get */ |
| 0, /* tp_descr_set */ |
| offsetof(buffered, dict), /* tp_dictoffset */ |
| (initproc)bufferedreader_init, /* tp_init */ |
| 0, /* tp_alloc */ |
| PyType_GenericNew, /* tp_new */ |
| }; |
| |
| |
| |
| static int |
| complain_about_max_buffer_size(void) |
| { |
| if (PyErr_WarnEx(PyExc_DeprecationWarning, |
| "max_buffer_size is deprecated", 1) < 0) |
| return 0; |
| return 1; |
| } |
| |
| /* |
| * class BufferedWriter |
| */ |
| PyDoc_STRVAR(bufferedwriter_doc, |
| "A buffer for a writeable sequential RawIO object.\n" |
| "\n" |
| "The constructor creates a BufferedWriter for the given writeable raw\n" |
| "stream. If the buffer_size is not given, it defaults to\n" |
| "DEFAULT_BUFFER_SIZE. max_buffer_size isn't used anymore.\n" |
| ); |
| |
| static void |
| _bufferedwriter_reset_buf(buffered *self) |
| { |
| self->write_pos = 0; |
| self->write_end = -1; |
| } |
| |
| static int |
| bufferedwriter_init(buffered *self, PyObject *args, PyObject *kwds) |
| { |
| /* TODO: properly deprecate max_buffer_size */ |
| char *kwlist[] = {"raw", "buffer_size", "max_buffer_size", NULL}; |
| Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE; |
| Py_ssize_t max_buffer_size = -234; |
| PyObject *raw; |
| |
| self->ok = 0; |
| self->detached = 0; |
| |
| if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|nn:BufferedReader", kwlist, |
| &raw, &buffer_size, &max_buffer_size)) { |
| return -1; |
| } |
| |
| if (max_buffer_size != -234 && !complain_about_max_buffer_size()) |
| return -1; |
| |
| if (_PyIOBase_check_writable(raw, Py_True) == NULL) |
| return -1; |
| |
| Py_CLEAR(self->raw); |
| Py_INCREF(raw); |
| self->raw = raw; |
| self->readable = 0; |
| self->writable = 1; |
| |
| self->buffer_size = buffer_size; |
| if (_buffered_init(self) < 0) |
| return -1; |
| _bufferedwriter_reset_buf(self); |
| self->pos = 0; |
| |
| self->fast_closed_checks = (Py_TYPE(self) == &PyBufferedWriter_Type && |
| Py_TYPE(raw) == &PyFileIO_Type); |
| |
| self->ok = 1; |
| return 0; |
| } |
| |
| static Py_ssize_t |
| _bufferedwriter_raw_write(buffered *self, char *start, Py_ssize_t len) |
| { |
| Py_buffer buf; |
| PyObject *memobj, *res; |
| Py_ssize_t n; |
| /* NOTE: the buffer needn't be released as its object is NULL. */ |
| if (PyBuffer_FillInfo(&buf, NULL, start, len, 1, PyBUF_CONTIG_RO) == -1) |
| return -1; |
| memobj = PyMemoryView_FromBuffer(&buf); |
| if (memobj == NULL) |
| return -1; |
| /* NOTE: PyErr_SetFromErrno() calls PyErr_CheckSignals() when EINTR |
| occurs so we needn't do it ourselves. |
| We then retry writing, ignoring the signal if no handler has |
| raised (see issue #10956). |
| */ |
| do { |
| res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_write, memobj, NULL); |
| } while (res == NULL && _trap_eintr()); |
| Py_DECREF(memobj); |
| if (res == NULL) |
| return -1; |
| n = PyNumber_AsSsize_t(res, PyExc_ValueError); |
| Py_DECREF(res); |
| if (n < 0 || n > len) { |
| PyErr_Format(PyExc_IOError, |
| "raw write() returned invalid length %zd " |
| "(should have been between 0 and %zd)", n, len); |
| return -1; |
| } |
| if (n > 0 && self->abs_pos != -1) |
| self->abs_pos += n; |
| return n; |
| } |
| |
| /* `restore_pos` is 1 if we need to restore the raw stream position at |
| the end, 0 otherwise. */ |
| static PyObject * |
| _bufferedwriter_flush_unlocked(buffered *self, int restore_pos) |
| { |
| Py_ssize_t written = 0; |
| Py_off_t n, rewind; |
| |
| if (!VALID_WRITE_BUFFER(self) || self->write_pos == self->write_end) |
| goto end; |
| /* First, rewind */ |
| rewind = RAW_OFFSET(self) + (self->pos - self->write_pos); |
| if (rewind != 0) { |
| n = _buffered_raw_seek(self, -rewind, 1); |
| if (n < 0) { |
| goto error; |
| } |
| self->raw_pos -= rewind; |
| } |
| while (self->write_pos < self->write_end) { |
| n = _bufferedwriter_raw_write(self, |
| self->buffer + self->write_pos, |
| Py_SAFE_DOWNCAST(self->write_end - self->write_pos, |
| Py_off_t, Py_ssize_t)); |
| if (n == -1) { |
| Py_ssize_t *w = _buffered_check_blocking_error(); |
| if (w == NULL) |
| goto error; |
| self->write_pos += *w; |
| self->raw_pos = self->write_pos; |
| written += *w; |
| *w = written; |
| /* Already re-raised */ |
| goto error; |
| } |
| self->write_pos += n; |
| self->raw_pos = self->write_pos; |
| written += Py_SAFE_DOWNCAST(n, Py_off_t, Py_ssize_t); |
| /* Partial writes can return successfully when interrupted by a |
| signal (see write(2)). We must run signal handlers before |
| blocking another time, possibly indefinitely. */ |
| if (PyErr_CheckSignals() < 0) |
| goto error; |
| } |
| |
| if (restore_pos) { |
| Py_off_t forward = rewind - written; |
| if (forward != 0) { |
| n = _buffered_raw_seek(self, forward, 1); |
| if (n < 0) { |
| goto error; |
| } |
| self->raw_pos += forward; |
| } |
| } |
| _bufferedwriter_reset_buf(self); |
| |
| end: |
| Py_RETURN_NONE; |
| |
| error: |
| return NULL; |
| } |
| |
| static PyObject * |
| bufferedwriter_write(buffered *self, PyObject *args) |
| { |
| PyObject *res = NULL; |
| Py_buffer buf; |
| Py_ssize_t written, avail, remaining; |
| Py_off_t offset; |
| |
| CHECK_INITIALIZED(self) |
| if (!PyArg_ParseTuple(args, "y*:write", &buf)) { |
| return NULL; |
| } |
| |
| if (IS_CLOSED(self)) { |
| PyErr_SetString(PyExc_ValueError, "write to closed file"); |
| PyBuffer_Release(&buf); |
| return NULL; |
| } |
| |
| if (!ENTER_BUFFERED(self)) { |
| PyBuffer_Release(&buf); |
| return NULL; |
| } |
| |
| /* Fast path: the data to write can be fully buffered. */ |
| if (!VALID_READ_BUFFER(self) && !VALID_WRITE_BUFFER(self)) { |
| self->pos = 0; |
| self->raw_pos = 0; |
| } |
| avail = Py_SAFE_DOWNCAST(self->buffer_size - self->pos, Py_off_t, Py_ssize_t); |
| if (buf.len <= avail) { |
| memcpy(self->buffer + self->pos, buf.buf, buf.len); |
| if (!VALID_WRITE_BUFFER(self) || self->write_pos > self->pos) { |
| self->write_pos = self->pos; |
| } |
| ADJUST_POSITION(self, self->pos + buf.len); |
| if (self->pos > self->write_end) |
| self->write_end = self->pos; |
| written = buf.len; |
| goto end; |
| } |
| |
| /* First write the current buffer */ |
| res = _bufferedwriter_flush_unlocked(self, 0); |
| if (res == NULL) { |
| Py_ssize_t *w = _buffered_check_blocking_error(); |
| if (w == NULL) |
| goto error; |
| if (self->readable) |
| _bufferedreader_reset_buf(self); |
| /* Make some place by shifting the buffer. */ |
| assert(VALID_WRITE_BUFFER(self)); |
| memmove(self->buffer, self->buffer + self->write_pos, |
| Py_SAFE_DOWNCAST(self->write_end - self->write_pos, |
| Py_off_t, Py_ssize_t)); |
| self->write_end -= self->write_pos; |
| self->raw_pos -= self->write_pos; |
| self->pos -= self->write_pos; |
| self->write_pos = 0; |
| avail = Py_SAFE_DOWNCAST(self->buffer_size - self->write_end, |
| Py_off_t, Py_ssize_t); |
| if (buf.len <= avail) { |
| /* Everything can be buffered */ |
| PyErr_Clear(); |
| memcpy(self->buffer + self->write_end, buf.buf, buf.len); |
| self->write_end += buf.len; |
| written = buf.len; |
| goto end; |
| } |
| /* Buffer as much as possible. */ |
| memcpy(self->buffer + self->write_end, buf.buf, avail); |
| self->write_end += avail; |
| /* Already re-raised */ |
| *w = avail; |
| goto error; |
| } |
| Py_CLEAR(res); |
| |
| /* Adjust the raw stream position if it is away from the logical stream |
| position. This happens if the read buffer has been filled but not |
| modified (and therefore _bufferedwriter_flush_unlocked() didn't rewind |
| the raw stream by itself). |
| Fixes issue #6629. |
| */ |
| offset = RAW_OFFSET(self); |
| if (offset != 0) { |
| if (_buffered_raw_seek(self, -offset, 1) < 0) |
| goto error; |
| self->raw_pos -= offset; |
| } |
| |
| /* Then write buf itself. At this point the buffer has been emptied. */ |
| remaining = buf.len; |
| written = 0; |
| while (remaining > self->buffer_size) { |
| Py_ssize_t n = _bufferedwriter_raw_write( |
| self, (char *) buf.buf + written, buf.len - written); |
| if (n == -1) { |
| Py_ssize_t *w = _buffered_check_blocking_error(); |
| if (w == NULL) |
| goto error; |
| written += *w; |
| remaining -= *w; |
| if (remaining > self->buffer_size) { |
| /* Can't buffer everything, still buffer as much as possible */ |
| memcpy(self->buffer, |
| (char *) buf.buf + written, self->buffer_size); |
| self->raw_pos = 0; |
| ADJUST_POSITION(self, self->buffer_size); |
| self->write_end = self->buffer_size; |
| *w = written + self->buffer_size; |
| /* Already re-raised */ |
| goto error; |
| } |
| PyErr_Clear(); |
| break; |
| } |
| written += n; |
| remaining -= n; |
| /* Partial writes can return successfully when interrupted by a |
| signal (see write(2)). We must run signal handlers before |
| blocking another time, possibly indefinitely. */ |
| if (PyErr_CheckSignals() < 0) |
| goto error; |
| } |
| if (self->readable) |
| _bufferedreader_reset_buf(self); |
| if (remaining > 0) { |
| memcpy(self->buffer, (char *) buf.buf + written, remaining); |
| written += remaining; |
| } |
| self->write_pos = 0; |
| /* TODO: sanity check (remaining >= 0) */ |
| self->write_end = remaining; |
| ADJUST_POSITION(self, remaining); |
| self->raw_pos = 0; |
| |
| end: |
| res = PyLong_FromSsize_t(written); |
| |
| error: |
| LEAVE_BUFFERED(self) |
| PyBuffer_Release(&buf); |
| return res; |
| } |
| |
| static PyMethodDef bufferedwriter_methods[] = { |
| /* BufferedIOMixin methods */ |
| {"close", (PyCFunction)buffered_close, METH_NOARGS}, |
| {"detach", (PyCFunction)buffered_detach, METH_NOARGS}, |
| {"seekable", (PyCFunction)buffered_seekable, METH_NOARGS}, |
| {"readable", (PyCFunction)buffered_readable, METH_NOARGS}, |
| {"writable", (PyCFunction)buffered_writable, METH_NOARGS}, |
| {"fileno", (PyCFunction)buffered_fileno, METH_NOARGS}, |
| {"isatty", (PyCFunction)buffered_isatty, METH_NOARGS}, |
| {"_dealloc_warn", (PyCFunction)buffered_dealloc_warn, METH_O}, |
| {"__getstate__", (PyCFunction)buffered_getstate, METH_NOARGS}, |
| |
| {"write", (PyCFunction)bufferedwriter_write, METH_VARARGS}, |
| {"truncate", (PyCFunction)buffered_truncate, METH_VARARGS}, |
| {"flush", (PyCFunction)buffered_flush, METH_NOARGS}, |
| {"seek", (PyCFunction)buffered_seek, METH_VARARGS}, |
| {"tell", (PyCFunction)buffered_tell, METH_NOARGS}, |
| {NULL, NULL} |
| }; |
| |
| static PyMemberDef bufferedwriter_members[] = { |
| {"raw", T_OBJECT, offsetof(buffered, raw), READONLY}, |
| {NULL} |
| }; |
| |
| static PyGetSetDef bufferedwriter_getset[] = { |
| {"closed", (getter)buffered_closed_get, NULL, NULL}, |
| {"name", (getter)buffered_name_get, NULL, NULL}, |
| {"mode", (getter)buffered_mode_get, NULL, NULL}, |
| {NULL} |
| }; |
| |
| |
| PyTypeObject PyBufferedWriter_Type = { |
| PyVarObject_HEAD_INIT(NULL, 0) |
| "_io.BufferedWriter", /*tp_name*/ |
| sizeof(buffered), /*tp_basicsize*/ |
| 0, /*tp_itemsize*/ |
| (destructor)buffered_dealloc, /*tp_dealloc*/ |
| 0, /*tp_print*/ |
| 0, /*tp_getattr*/ |
| 0, /*tp_setattr*/ |
| 0, /*tp_compare */ |
| (reprfunc)buffered_repr, /*tp_repr*/ |
| 0, /*tp_as_number*/ |
| 0, /*tp_as_sequence*/ |
| 0, /*tp_as_mapping*/ |
| 0, /*tp_hash */ |
| 0, /*tp_call*/ |
| 0, /*tp_str*/ |
| 0, /*tp_getattro*/ |
| 0, /*tp_setattro*/ |
| 0, /*tp_as_buffer*/ |
| Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
| | Py_TPFLAGS_HAVE_GC, /*tp_flags*/ |
| bufferedwriter_doc, /* tp_doc */ |
| (traverseproc)buffered_traverse, /* tp_traverse */ |
| (inquiry)buffered_clear, /* tp_clear */ |
| 0, /* tp_richcompare */ |
| offsetof(buffered, weakreflist), /*tp_weaklistoffset*/ |
| 0, /* tp_iter */ |
| 0, /* tp_iternext */ |
| bufferedwriter_methods, /* tp_methods */ |
| bufferedwriter_members, /* tp_members */ |
| bufferedwriter_getset, /* tp_getset */ |
| 0, /* tp_base */ |
| 0, /* tp_dict */ |
| 0, /* tp_descr_get */ |
| 0, /* tp_descr_set */ |
| offsetof(buffered, dict), /* tp_dictoffset */ |
| (initproc)bufferedwriter_init, /* tp_init */ |
| 0, /* tp_alloc */ |
| PyType_GenericNew, /* tp_new */ |
| }; |
| |
| |
| |
| /* |
| * BufferedRWPair |
| */ |
| |
| PyDoc_STRVAR(bufferedrwpair_doc, |
| "A buffered reader and writer object together.\n" |
| "\n" |
| "A buffered reader object and buffered writer object put together to\n" |
| "form a sequential IO object that can read and write. This is typically\n" |
| "used with a socket or two-way pipe.\n" |
| "\n" |
| "reader and writer are RawIOBase objects that are readable and\n" |
| "writeable respectively. If the buffer_size is omitted it defaults to\n" |
| "DEFAULT_BUFFER_SIZE.\n" |
| ); |
| |
| /* XXX The usefulness of this (compared to having two separate IO objects) is |
| * questionable. |
| */ |
| |
| typedef struct { |
| PyObject_HEAD |
| buffered *reader; |
| buffered *writer; |
| PyObject *dict; |
| PyObject *weakreflist; |
| } rwpair; |
| |
| static int |
| bufferedrwpair_init(rwpair *self, PyObject *args, PyObject *kwds) |
| { |
| PyObject *reader, *writer; |
| Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE; |
| Py_ssize_t max_buffer_size = -234; |
| |
| if (!PyArg_ParseTuple(args, "OO|nn:BufferedRWPair", &reader, &writer, |
| &buffer_size, &max_buffer_size)) { |
| return -1; |
| } |
| |
| if (max_buffer_size != -234 && !complain_about_max_buffer_size()) |
| return -1; |
| |
| if (_PyIOBase_check_readable(reader, Py_True) == NULL) |
| return -1; |
| if (_PyIOBase_check_writable(writer, Py_True) == NULL) |
| return -1; |
| |
| self->reader = (buffered *) PyObject_CallFunction( |
| (PyObject *) &PyBufferedReader_Type, "On", reader, buffer_size); |
| if (self->reader == NULL) |
| return -1; |
| |
| self->writer = (buffered *) PyObject_CallFunction( |
| (PyObject *) &PyBufferedWriter_Type, "On", writer, buffer_size); |
| if (self->writer == NULL) { |
| Py_CLEAR(self->reader); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| static int |
| bufferedrwpair_traverse(rwpair *self, visitproc visit, void *arg) |
| { |
| Py_VISIT(self->dict); |
| return 0; |
| } |
| |
| static int |
| bufferedrwpair_clear(rwpair *self) |
| { |
| Py_CLEAR(self->reader); |
| Py_CLEAR(self->writer); |
| Py_CLEAR(self->dict); |
| return 0; |
| } |
| |
| static void |
| bufferedrwpair_dealloc(rwpair *self) |
| { |
| _PyObject_GC_UNTRACK(self); |
| Py_CLEAR(self->reader); |
| Py_CLEAR(self->writer); |
| Py_CLEAR(self->dict); |
| Py_TYPE(self)->tp_free((PyObject *) self); |
| } |
| |
| static PyObject * |
| _forward_call(buffered *self, const char *name, PyObject *args) |
| { |
| PyObject *func = PyObject_GetAttrString((PyObject *)self, name); |
| PyObject *ret; |
| |
| if (func == NULL) { |
| PyErr_SetString(PyExc_AttributeError, name); |
| return NULL; |
| } |
| |
| ret = PyObject_CallObject(func, args); |
| Py_DECREF(func); |
| return ret; |
| } |
| |
| static PyObject * |
| bufferedrwpair_read(rwpair *self, PyObject *args) |
| { |
| return _forward_call(self->reader, "read", args); |
| } |
| |
| static PyObject * |
| bufferedrwpair_peek(rwpair *self, PyObject *args) |
| { |
| return _forward_call(self->reader, "peek", args); |
| } |
| |
| static PyObject * |
| bufferedrwpair_read1(rwpair *self, PyObject *args) |
| { |
| return _forward_call(self->reader, "read1", args); |
| } |
| |
| static PyObject * |
| bufferedrwpair_readinto(rwpair *self, PyObject *args) |
| { |
| return _forward_call(self->reader, "readinto", args); |
| } |
| |
| static PyObject * |
| bufferedrwpair_write(rwpair *self, PyObject *args) |
| { |
| return _forward_call(self->writer, "write", args); |
| } |
| |
| static PyObject * |
| bufferedrwpair_flush(rwpair *self, PyObject *args) |
| { |
| return _forward_call(self->writer, "flush", args); |
| } |
| |
| static PyObject * |
| bufferedrwpair_readable(rwpair *self, PyObject *args) |
| { |
| return _forward_call(self->reader, "readable", args); |
| } |
| |
| static PyObject * |
| bufferedrwpair_writable(rwpair *self, PyObject *args) |
| { |
| return _forward_call(self->writer, "writable", args); |
| } |
| |
| static PyObject * |
| bufferedrwpair_close(rwpair *self, PyObject *args) |
| { |
| PyObject *ret = _forward_call(self->writer, "close", args); |
| if (ret == NULL) |
| return NULL; |
| Py_DECREF(ret); |
| |
| return _forward_call(self->reader, "close", args); |
| } |
| |
| static PyObject * |
| bufferedrwpair_isatty(rwpair *self, PyObject *args) |
| { |
| PyObject *ret = _forward_call(self->writer, "isatty", args); |
| |
| if (ret != Py_False) { |
| /* either True or exception */ |
| return ret; |
| } |
| Py_DECREF(ret); |
| |
| return _forward_call(self->reader, "isatty", args); |
| } |
| |
| static PyObject * |
| bufferedrwpair_closed_get(rwpair *self, void *context) |
| { |
| return PyObject_GetAttr((PyObject *) self->writer, _PyIO_str_closed); |
| } |
| |
| static PyMethodDef bufferedrwpair_methods[] = { |
| {"read", (PyCFunction)bufferedrwpair_read, METH_VARARGS}, |
| {"peek", (PyCFunction)bufferedrwpair_peek, METH_VARARGS}, |
| {"read1", (PyCFunction)bufferedrwpair_read1, METH_VARARGS}, |
| {"readinto", (PyCFunction)bufferedrwpair_readinto, METH_VARARGS}, |
| |
| {"write", (PyCFunction)bufferedrwpair_write, METH_VARARGS}, |
| {"flush", (PyCFunction)bufferedrwpair_flush, METH_NOARGS}, |
| |
| {"readable", (PyCFunction)bufferedrwpair_readable, METH_NOARGS}, |
| {"writable", (PyCFunction)bufferedrwpair_writable, METH_NOARGS}, |
| |
| {"close", (PyCFunction)bufferedrwpair_close, METH_NOARGS}, |
| {"isatty", (PyCFunction)bufferedrwpair_isatty, METH_NOARGS}, |
| |
| {"__getstate__", (PyCFunction)buffered_getstate, METH_NOARGS}, |
| |
| {NULL, NULL} |
| }; |
| |
| static PyGetSetDef bufferedrwpair_getset[] = { |
| {"closed", (getter)bufferedrwpair_closed_get, NULL, NULL}, |
| {NULL} |
| }; |
| |
| PyTypeObject PyBufferedRWPair_Type = { |
| PyVarObject_HEAD_INIT(NULL, 0) |
| "_io.BufferedRWPair", /*tp_name*/ |
| sizeof(rwpair), /*tp_basicsize*/ |
| 0, /*tp_itemsize*/ |
| (destructor)bufferedrwpair_dealloc, /*tp_dealloc*/ |
| 0, /*tp_print*/ |
| 0, /*tp_getattr*/ |
| 0, /*tp_setattr*/ |
| 0, /*tp_compare */ |
| 0, /*tp_repr*/ |
| 0, /*tp_as_number*/ |
| 0, /*tp_as_sequence*/ |
| 0, /*tp_as_mapping*/ |
| 0, /*tp_hash */ |
| 0, /*tp_call*/ |
| 0, /*tp_str*/ |
| 0, /*tp_getattro*/ |
| 0, /*tp_setattro*/ |
| 0, /*tp_as_buffer*/ |
| Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
| | Py_TPFLAGS_HAVE_GC, /* tp_flags */ |
| bufferedrwpair_doc, /* tp_doc */ |
| (traverseproc)bufferedrwpair_traverse, /* tp_traverse */ |
| (inquiry)bufferedrwpair_clear, /* tp_clear */ |
| 0, /* tp_richcompare */ |
| offsetof(rwpair, weakreflist), /*tp_weaklistoffset*/ |
| 0, /* tp_iter */ |
| 0, /* tp_iternext */ |
| bufferedrwpair_methods, /* tp_methods */ |
| 0, /* tp_members */ |
| bufferedrwpair_getset, /* tp_getset */ |
| 0, /* tp_base */ |
| 0, /* tp_dict */ |
| 0, /* tp_descr_get */ |
| 0, /* tp_descr_set */ |
| offsetof(rwpair, dict), /* tp_dictoffset */ |
| (initproc)bufferedrwpair_init, /* tp_init */ |
| 0, /* tp_alloc */ |
| PyType_GenericNew, /* tp_new */ |
| }; |
| |
| |
| |
| /* |
| * BufferedRandom |
| */ |
| |
| PyDoc_STRVAR(bufferedrandom_doc, |
| "A buffered interface to random access streams.\n" |
| "\n" |
| "The constructor creates a reader and writer for a seekable stream,\n" |
| "raw, given in the first argument. If the buffer_size is omitted it\n" |
| "defaults to DEFAULT_BUFFER_SIZE. max_buffer_size isn't used anymore.\n" |
| ); |
| |
| static int |
| bufferedrandom_init(buffered *self, PyObject *args, PyObject *kwds) |
| { |
| char *kwlist[] = {"raw", "buffer_size", "max_buffer_size", NULL}; |
| Py_ssize_t buffer_size = DEFAULT_BUFFER_SIZE; |
| Py_ssize_t max_buffer_size = -234; |
| PyObject *raw; |
| |
| self->ok = 0; |
| self->detached = 0; |
| |
| if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|nn:BufferedReader", kwlist, |
| &raw, &buffer_size, &max_buffer_size)) { |
| return -1; |
| } |
| |
| if (max_buffer_size != -234 && !complain_about_max_buffer_size()) |
| return -1; |
| |
| if (_PyIOBase_check_seekable(raw, Py_True) == NULL) |
| return -1; |
| if (_PyIOBase_check_readable(raw, Py_True) == NULL) |
| return -1; |
| if (_PyIOBase_check_writable(raw, Py_True) == NULL) |
| return -1; |
| |
| Py_CLEAR(self->raw); |
| Py_INCREF(raw); |
| self->raw = raw; |
| self->buffer_size = buffer_size; |
| self->readable = 1; |
| self->writable = 1; |
| |
| if (_buffered_init(self) < 0) |
| return -1; |
| _bufferedreader_reset_buf(self); |
| _bufferedwriter_reset_buf(self); |
| self->pos = 0; |
| |
| self->fast_closed_checks = (Py_TYPE(self) == &PyBufferedRandom_Type && |
| Py_TYPE(raw) == &PyFileIO_Type); |
| |
| self->ok = 1; |
| return 0; |
| } |
| |
| static PyMethodDef bufferedrandom_methods[] = { |
| /* BufferedIOMixin methods */ |
| {"close", (PyCFunction)buffered_close, METH_NOARGS}, |
| {"detach", (PyCFunction)buffered_detach, METH_NOARGS}, |
| {"seekable", (PyCFunction)buffered_seekable, METH_NOARGS}, |
| {"readable", (PyCFunction)buffered_readable, METH_NOARGS}, |
| {"writable", (PyCFunction)buffered_writable, METH_NOARGS}, |
| {"fileno", (PyCFunction)buffered_fileno, METH_NOARGS}, |
| {"isatty", (PyCFunction)buffered_isatty, METH_NOARGS}, |
| {"_dealloc_warn", (PyCFunction)buffered_dealloc_warn, METH_O}, |
| {"__getstate__", (PyCFunction)buffered_getstate, METH_NOARGS}, |
| |
| {"flush", (PyCFunction)buffered_flush, METH_NOARGS}, |
| |
| {"seek", (PyCFunction)buffered_seek, METH_VARARGS}, |
| {"tell", (PyCFunction)buffered_tell, METH_NOARGS}, |
| {"truncate", (PyCFunction)buffered_truncate, METH_VARARGS}, |
| {"read", (PyCFunction)buffered_read, METH_VARARGS}, |
| {"read1", (PyCFunction)buffered_read1, METH_VARARGS}, |
| {"readinto", (PyCFunction)buffered_readinto, METH_VARARGS}, |
| {"readline", (PyCFunction)buffered_readline, METH_VARARGS}, |
| {"peek", (PyCFunction)buffered_peek, METH_VARARGS}, |
| {"write", (PyCFunction)bufferedwriter_write, METH_VARARGS}, |
| {NULL, NULL} |
| }; |
| |
| static PyMemberDef bufferedrandom_members[] = { |
| {"raw", T_OBJECT, offsetof(buffered, raw), READONLY}, |
| {NULL} |
| }; |
| |
| static PyGetSetDef bufferedrandom_getset[] = { |
| {"closed", (getter)buffered_closed_get, NULL, NULL}, |
| {"name", (getter)buffered_name_get, NULL, NULL}, |
| {"mode", (getter)buffered_mode_get, NULL, NULL}, |
| {NULL} |
| }; |
| |
| |
| PyTypeObject PyBufferedRandom_Type = { |
| PyVarObject_HEAD_INIT(NULL, 0) |
| "_io.BufferedRandom", /*tp_name*/ |
| sizeof(buffered), /*tp_basicsize*/ |
| 0, /*tp_itemsize*/ |
| (destructor)buffered_dealloc, /*tp_dealloc*/ |
| 0, /*tp_print*/ |
| 0, /*tp_getattr*/ |
| 0, /*tp_setattr*/ |
| 0, /*tp_compare */ |
| (reprfunc)buffered_repr, /*tp_repr*/ |
| 0, /*tp_as_number*/ |
| 0, /*tp_as_sequence*/ |
| 0, /*tp_as_mapping*/ |
| 0, /*tp_hash */ |
| 0, /*tp_call*/ |
| 0, /*tp_str*/ |
| 0, /*tp_getattro*/ |
| 0, /*tp_setattro*/ |
| 0, /*tp_as_buffer*/ |
| Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
| | Py_TPFLAGS_HAVE_GC, /*tp_flags*/ |
| bufferedrandom_doc, /* tp_doc */ |
| (traverseproc)buffered_traverse, /* tp_traverse */ |
| (inquiry)buffered_clear, /* tp_clear */ |
| 0, /* tp_richcompare */ |
| offsetof(buffered, weakreflist), /*tp_weaklistoffset*/ |
| 0, /* tp_iter */ |
| (iternextfunc)buffered_iternext, /* tp_iternext */ |
| bufferedrandom_methods, /* tp_methods */ |
| bufferedrandom_members, /* tp_members */ |
| bufferedrandom_getset, /* tp_getset */ |
| 0, /* tp_base */ |
| 0, /*tp_dict*/ |
| 0, /* tp_descr_get */ |
| 0, /* tp_descr_set */ |
| offsetof(buffered, dict), /*tp_dictoffset*/ |
| (initproc)bufferedrandom_init, /* tp_init */ |
| 0, /* tp_alloc */ |
| PyType_GenericNew, /* tp_new */ |
| }; |