mirror of https://github.com/python/cpython
2742 lines
80 KiB
C
2742 lines
80 KiB
C
/*
|
||
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"
|
||
|
||
/*[clinic input]
|
||
module _io
|
||
class _io._BufferedIOBase "PyObject *" "&PyBufferedIOBase_Type"
|
||
class _io._Buffered "buffered *" "&PyBufferedIOBase_Type"
|
||
class _io.BufferedReader "buffered *" "&PyBufferedReader_Type"
|
||
class _io.BufferedWriter "buffered *" "&PyBufferedWriter_Type"
|
||
class _io.BufferedRWPair "rwpair *" "&PyBufferedRWPair_Type"
|
||
class _io.BufferedRandom "buffered *" "&PyBufferedRandom_Type"
|
||
[clinic start generated code]*/
|
||
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=59460b9c5639984d]*/
|
||
|
||
/*[python input]
|
||
class io_ssize_t_converter(CConverter):
|
||
type = 'Py_ssize_t'
|
||
converter = '_PyIO_ConvertSsize_t'
|
||
[python start generated code]*/
|
||
/*[python end generated code: output=da39a3ee5e6b4b0d input=d0a811d3cbfd1b33]*/
|
||
|
||
_Py_IDENTIFIER(close);
|
||
_Py_IDENTIFIER(_dealloc_warn);
|
||
_Py_IDENTIFIER(flush);
|
||
_Py_IDENTIFIER(isatty);
|
||
_Py_IDENTIFIER(mode);
|
||
_Py_IDENTIFIER(name);
|
||
_Py_IDENTIFIER(peek);
|
||
_Py_IDENTIFIER(read);
|
||
_Py_IDENTIFIER(read1);
|
||
_Py_IDENTIFIER(readable);
|
||
_Py_IDENTIFIER(readinto);
|
||
_Py_IDENTIFIER(readinto1);
|
||
_Py_IDENTIFIER(writable);
|
||
_Py_IDENTIFIER(write);
|
||
|
||
/*
|
||
* 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_generic(PyObject *self, Py_buffer *buffer, char readinto1)
|
||
{
|
||
Py_ssize_t len;
|
||
PyObject *data;
|
||
|
||
data = _PyObject_CallMethodId(self,
|
||
readinto1 ? &PyId_read1 : &PyId_read,
|
||
"n", buffer->len);
|
||
if (data == NULL)
|
||
return NULL;
|
||
|
||
if (!PyBytes_Check(data)) {
|
||
Py_DECREF(data);
|
||
PyErr_SetString(PyExc_TypeError, "read() should return bytes");
|
||
return NULL;
|
||
}
|
||
|
||
len = Py_SIZE(data);
|
||
if (len > buffer->len) {
|
||
PyErr_Format(PyExc_ValueError,
|
||
"read() returned too much data: "
|
||
"%zd bytes requested, %zd returned",
|
||
buffer->len, len);
|
||
Py_DECREF(data);
|
||
return NULL;
|
||
}
|
||
memcpy(buffer->buf, PyBytes_AS_STRING(data), len);
|
||
|
||
Py_DECREF(data);
|
||
|
||
return PyLong_FromSsize_t(len);
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io._BufferedIOBase.readinto
|
||
buffer: Py_buffer(accept={rwbuffer})
|
||
/
|
||
[clinic start generated code]*/
|
||
|
||
static PyObject *
|
||
_io__BufferedIOBase_readinto_impl(PyObject *self, Py_buffer *buffer)
|
||
/*[clinic end generated code: output=8c8cda6684af8038 input=00a6b9a38f29830a]*/
|
||
{
|
||
return _bufferediobase_readinto_generic(self, buffer, 0);
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io._BufferedIOBase.readinto1
|
||
buffer: Py_buffer(accept={rwbuffer})
|
||
/
|
||
[clinic start generated code]*/
|
||
|
||
static PyObject *
|
||
_io__BufferedIOBase_readinto1_impl(PyObject *self, Py_buffer *buffer)
|
||
/*[clinic end generated code: output=358623e4fd2b69d3 input=ebad75b4aadfb9be]*/
|
||
{
|
||
return _bufferediobase_readinto_generic(self, buffer, 1);
|
||
}
|
||
|
||
static PyObject *
|
||
bufferediobase_unsupported(const char *message)
|
||
{
|
||
_PyIO_State *state = IO_STATE();
|
||
if (state != NULL)
|
||
PyErr_SetString(state->unsupported_operation, message);
|
||
return NULL;
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io._BufferedIOBase.detach
|
||
|
||
Disconnect this buffer from its underlying raw stream and return it.
|
||
|
||
After the raw stream has been detached, the buffer is in an unusable
|
||
state.
|
||
[clinic start generated code]*/
|
||
|
||
static PyObject *
|
||
_io__BufferedIOBase_detach_impl(PyObject *self)
|
||
/*[clinic end generated code: output=754977c8d10ed88c input=822427fb58fe4169]*/
|
||
{
|
||
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 *
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||
bufferediobase_read(PyObject *self, PyObject *args)
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||
{
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||
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 *
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||
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 always the length of b\n"
|
||
"in bytes.\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");
|
||
}
|
||
|
||
|
||
typedef struct {
|
||
PyObject_HEAD
|
||
|
||
PyObject *raw;
|
||
int ok; /* Initialized? */
|
||
int detached;
|
||
int readable;
|
||
int writable;
|
||
char finalizing;
|
||
|
||
/* 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)
|
||
{
|
||
int relax_locking;
|
||
PyLockStatus st;
|
||
if (self->owner == PyThread_get_thread_ident()) {
|
||
PyErr_Format(PyExc_RuntimeError,
|
||
"reentrant call inside %R", self);
|
||
return 0;
|
||
}
|
||
relax_locking = (_Py_Finalizing != NULL);
|
||
Py_BEGIN_ALLOW_THREADS
|
||
if (!relax_locking)
|
||
st = PyThread_acquire_lock(self->lock, 1);
|
||
else {
|
||
/* When finalizing, we don't want a deadlock to happen with daemon
|
||
* threads abruptly shut down while they owned the lock.
|
||
* Therefore, only wait for a grace period (1 s.).
|
||
* Note that non-daemon threads have already exited here, so this
|
||
* shouldn't affect carefully written threaded I/O code.
|
||
*/
|
||
st = PyThread_acquire_lock_timed(self->lock, (PY_TIMEOUT_T)1e6, 0);
|
||
}
|
||
Py_END_ALLOW_THREADS
|
||
if (relax_locking && st != PY_LOCK_ACQUIRED) {
|
||
PyObject *msgobj = PyUnicode_FromFormat(
|
||
"could not acquire lock for %A at interpreter "
|
||
"shutdown, possibly due to daemon threads",
|
||
(PyObject *) self);
|
||
const char *msg = PyUnicode_AsUTF8(msgobj);
|
||
Py_FatalError(msg);
|
||
}
|
||
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->finalizing = 1;
|
||
if (_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 PyObject *
|
||
buffered_sizeof(buffered *self, void *unused)
|
||
{
|
||
Py_ssize_t res;
|
||
|
||
res = _PyObject_SIZE(Py_TYPE(self));
|
||
if (self->buffer)
|
||
res += self->buffer_size;
|
||
return PyLong_FromSsize_t(res);
|
||
}
|
||
|
||
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)
|
||
{
|
||
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_CallMethodIdObjArgs(self->raw, &PyId__dealloc_warn,
|
||
source, NULL);
|
||
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, *exc = NULL, *val, *tb;
|
||
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->finalizing) {
|
||
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)
|
||
PyErr_Fetch(&exc, &val, &tb);
|
||
else
|
||
Py_DECREF(res);
|
||
|
||
res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_close, NULL);
|
||
|
||
if (self->buffer) {
|
||
PyMem_Free(self->buffer);
|
||
self->buffer = NULL;
|
||
}
|
||
|
||
if (exc != NULL) {
|
||
_PyErr_ChainExceptions(exc, val, tb);
|
||
Py_CLEAR(res);
|
||
}
|
||
|
||
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_GetAttrId(self->raw, &PyId_name);
|
||
}
|
||
|
||
static PyObject *
|
||
buffered_mode_get(buffered *self, void *context)
|
||
{
|
||
CHECK_INITIALIZED(self)
|
||
return _PyObject_GetAttrId(self->raw, &PyId_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 *);
|
||
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);
|
||
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);
|
||
static Py_ssize_t
|
||
_bufferedreader_raw_read(buffered *self, char *start, Py_ssize_t len);
|
||
|
||
/*
|
||
* Helpers
|
||
*/
|
||
|
||
/* Sets the current error to BlockingIOError */
|
||
static void
|
||
_set_BlockingIOError(const char *msg, Py_ssize_t written)
|
||
{
|
||
PyObject *err;
|
||
PyErr_Clear();
|
||
err = PyObject_CallFunction(PyExc_BlockingIOError, "isn",
|
||
errno, msg, written);
|
||
if (err)
|
||
PyErr_SetObject(PyExc_BlockingIOError, err);
|
||
Py_XDECREF(err);
|
||
}
|
||
|
||
/* 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;
|
||
PyOSErrorObject *err;
|
||
|
||
PyErr_Fetch(&t, &v, &tb);
|
||
if (v == NULL || !PyErr_GivenExceptionMatches(v, PyExc_BlockingIOError)) {
|
||
PyErr_Restore(t, v, tb);
|
||
return NULL;
|
||
}
|
||
err = (PyOSErrorObject *) 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.
|
||
*/
|
||
int
|
||
_PyIO_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);
|
||
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;
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io._Buffered.peek
|
||
size: Py_ssize_t = 0
|
||
/
|
||
|
||
[clinic start generated code]*/
|
||
|
||
static PyObject *
|
||
_io__Buffered_peek_impl(buffered *self, Py_ssize_t size)
|
||
/*[clinic end generated code: output=ba7a097ca230102b input=37ffb97d06ff4adb]*/
|
||
{
|
||
PyObject *res = NULL;
|
||
|
||
CHECK_INITIALIZED(self)
|
||
CHECK_CLOSED(self, "peek of closed file")
|
||
|
||
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);
|
||
|
||
end:
|
||
LEAVE_BUFFERED(self)
|
||
return res;
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io._Buffered.read
|
||
size as n: io_ssize_t = -1
|
||
/
|
||
[clinic start generated code]*/
|
||
|
||
static PyObject *
|
||
_io__Buffered_read_impl(buffered *self, Py_ssize_t n)
|
||
/*[clinic end generated code: output=f41c78bb15b9bbe9 input=c0939ec7f9e9354f]*/
|
||
{
|
||
PyObject *res;
|
||
|
||
CHECK_INITIALIZED(self)
|
||
if (n < -1) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"read length must be non-negative 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;
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io._Buffered.read1
|
||
size as n: Py_ssize_t = -1
|
||
/
|
||
[clinic start generated code]*/
|
||
|
||
static PyObject *
|
||
_io__Buffered_read1_impl(buffered *self, Py_ssize_t n)
|
||
/*[clinic end generated code: output=bcc4fb4e54d103a3 input=7d22de9630b61774]*/
|
||
{
|
||
Py_ssize_t have, r;
|
||
PyObject *res = NULL;
|
||
|
||
CHECK_INITIALIZED(self)
|
||
if (n < 0) {
|
||
n = self->buffer_size;
|
||
}
|
||
|
||
CHECK_CLOSED(self, "read of closed file")
|
||
|
||
if (n == 0)
|
||
return PyBytes_FromStringAndSize(NULL, 0);
|
||
|
||
/* Return up to n bytes. If at least one byte is buffered, we
|
||
only return buffered bytes. Otherwise, we do one raw read. */
|
||
|
||
have = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
|
||
if (have > 0) {
|
||
n = Py_MIN(have, n);
|
||
res = _bufferedreader_read_fast(self, n);
|
||
assert(res != Py_None);
|
||
return res;
|
||
}
|
||
res = PyBytes_FromStringAndSize(NULL, n);
|
||
if (res == NULL)
|
||
return NULL;
|
||
if (!ENTER_BUFFERED(self)) {
|
||
Py_DECREF(res);
|
||
return NULL;
|
||
}
|
||
_bufferedreader_reset_buf(self);
|
||
r = _bufferedreader_raw_read(self, PyBytes_AS_STRING(res), n);
|
||
LEAVE_BUFFERED(self)
|
||
if (r == -1) {
|
||
Py_DECREF(res);
|
||
return NULL;
|
||
}
|
||
if (r == -2)
|
||
r = 0;
|
||
if (n > r)
|
||
_PyBytes_Resize(&res, r);
|
||
return res;
|
||
}
|
||
|
||
static PyObject *
|
||
_buffered_readinto_generic(buffered *self, Py_buffer *buffer, char readinto1)
|
||
{
|
||
Py_ssize_t n, written = 0, remaining;
|
||
PyObject *res = NULL;
|
||
|
||
CHECK_INITIALIZED(self)
|
||
|
||
n = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
|
||
if (n > 0) {
|
||
if (n >= buffer->len) {
|
||
memcpy(buffer->buf, self->buffer + self->pos, buffer->len);
|
||
self->pos += buffer->len;
|
||
return PyLong_FromSsize_t(buffer->len);
|
||
}
|
||
memcpy(buffer->buf, self->buffer + self->pos, n);
|
||
self->pos += n;
|
||
written = n;
|
||
}
|
||
|
||
if (!ENTER_BUFFERED(self))
|
||
return NULL;
|
||
|
||
if (self->writable) {
|
||
res = buffered_flush_and_rewind_unlocked(self);
|
||
if (res == NULL)
|
||
goto end;
|
||
Py_CLEAR(res);
|
||
}
|
||
|
||
_bufferedreader_reset_buf(self);
|
||
self->pos = 0;
|
||
|
||
for (remaining = buffer->len - written;
|
||
remaining > 0;
|
||
written += n, remaining -= n) {
|
||
/* If remaining bytes is larger than internal buffer size, copy
|
||
* directly into caller's buffer. */
|
||
if (remaining > self->buffer_size) {
|
||
n = _bufferedreader_raw_read(self, (char *) buffer->buf + written,
|
||
remaining);
|
||
}
|
||
|
||
/* In readinto1 mode, we do not want to fill the internal
|
||
buffer if we already have some data to return */
|
||
else if (!(readinto1 && written)) {
|
||
n = _bufferedreader_fill_buffer(self);
|
||
if (n > 0) {
|
||
if (n > remaining)
|
||
n = remaining;
|
||
memcpy((char *) buffer->buf + written,
|
||
self->buffer + self->pos, n);
|
||
self->pos += n;
|
||
continue; /* short circuit */
|
||
}
|
||
}
|
||
else
|
||
n = 0;
|
||
|
||
if (n == 0 || (n == -2 && written > 0))
|
||
break;
|
||
if (n < 0) {
|
||
if (n == -2) {
|
||
Py_INCREF(Py_None);
|
||
res = Py_None;
|
||
}
|
||
goto end;
|
||
}
|
||
|
||
/* At most one read in readinto1 mode */
|
||
if (readinto1) {
|
||
written += n;
|
||
break;
|
||
}
|
||
}
|
||
res = PyLong_FromSsize_t(written);
|
||
|
||
end:
|
||
LEAVE_BUFFERED(self);
|
||
return res;
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io._Buffered.readinto
|
||
buffer: Py_buffer(accept={rwbuffer})
|
||
/
|
||
[clinic start generated code]*/
|
||
|
||
static PyObject *
|
||
_io__Buffered_readinto_impl(buffered *self, Py_buffer *buffer)
|
||
/*[clinic end generated code: output=bcb376580b1d8170 input=ed6b98b7a20a3008]*/
|
||
{
|
||
return _buffered_readinto_generic(self, buffer, 0);
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io._Buffered.readinto1
|
||
buffer: Py_buffer(accept={rwbuffer})
|
||
/
|
||
[clinic start generated code]*/
|
||
|
||
static PyObject *
|
||
_io__Buffered_readinto1_impl(buffered *self, Py_buffer *buffer)
|
||
/*[clinic end generated code: output=6e5c6ac5868205d6 input=4455c5d55fdf1687]*/
|
||
{
|
||
return _buffered_readinto_generic(self, buffer, 1);
|
||
}
|
||
|
||
|
||
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_XSETREF(res, _PyBytes_Join(_PyIO_empty_bytes, chunks));
|
||
|
||
end:
|
||
LEAVE_BUFFERED(self)
|
||
end_unlocked:
|
||
Py_XDECREF(chunks);
|
||
return res;
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io._Buffered.readline
|
||
size: io_ssize_t = -1
|
||
/
|
||
[clinic start generated code]*/
|
||
|
||
static PyObject *
|
||
_io__Buffered_readline_impl(buffered *self, Py_ssize_t size)
|
||
/*[clinic end generated code: output=24dd2aa6e33be83c input=ff1e0df821cb4e5c]*/
|
||
{
|
||
CHECK_INITIALIZED(self)
|
||
return _buffered_readline(self, size);
|
||
}
|
||
|
||
|
||
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);
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io._Buffered.seek
|
||
target as targetobj: object
|
||
whence: int = 0
|
||
/
|
||
[clinic start generated code]*/
|
||
|
||
static PyObject *
|
||
_io__Buffered_seek_impl(buffered *self, PyObject *targetobj, int whence)
|
||
/*[clinic end generated code: output=7ae0e8dc46efdefb input=a9c4920bfcba6163]*/
|
||
{
|
||
Py_off_t target, n;
|
||
PyObject *res = NULL;
|
||
|
||
CHECK_INITIALIZED(self)
|
||
|
||
/* Do some error checking instead of trusting OS 'seek()'
|
||
** error detection, just in case.
|
||
*/
|
||
if ((whence < 0 || whence >2)
|
||
#ifdef SEEK_HOLE
|
||
&& (whence != SEEK_HOLE)
|
||
#endif
|
||
#ifdef SEEK_DATA
|
||
&& (whence != SEEK_DATA)
|
||
#endif
|
||
) {
|
||
PyErr_Format(PyExc_ValueError,
|
||
"whence value %d unsupported", whence);
|
||
return NULL;
|
||
}
|
||
|
||
CHECK_CLOSED(self, "seek of closed file")
|
||
|
||
if (_PyIOBase_check_seekable(self->raw, Py_True) == NULL)
|
||
return NULL;
|
||
|
||
target = PyNumber_AsOff_t(targetobj, PyExc_ValueError);
|
||
if (target == -1 && PyErr_Occurred())
|
||
return NULL;
|
||
|
||
/* SEEK_SET and SEEK_CUR are special because we could seek inside the
|
||
buffer. Other whence values must be managed without this optimization.
|
||
Some Operating Systems can provide additional values, like
|
||
SEEK_HOLE/SEEK_DATA. */
|
||
if (((whence == 0) || (whence == 1)) && 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);
|
||
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;
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io._Buffered.truncate
|
||
pos: object = None
|
||
/
|
||
[clinic start generated code]*/
|
||
|
||
static PyObject *
|
||
_io__Buffered_truncate_impl(buffered *self, PyObject *pos)
|
||
/*[clinic end generated code: output=667ca03c60c270de input=8a1be34d57cca2d3]*/
|
||
{
|
||
PyObject *res = NULL;
|
||
|
||
CHECK_INITIALIZED(self)
|
||
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_GetAttrId((PyObject *) self, &PyId_name);
|
||
if (nameobj == NULL) {
|
||
if (PyErr_ExceptionMatches(PyExc_Exception))
|
||
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
|
||
*/
|
||
|
||
static void _bufferedreader_reset_buf(buffered *self)
|
||
{
|
||
self->read_end = -1;
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io.BufferedReader.__init__
|
||
raw: object
|
||
buffer_size: Py_ssize_t(c_default="DEFAULT_BUFFER_SIZE") = DEFAULT_BUFFER_SIZE
|
||
|
||
Create a new buffered reader using the given readable raw IO object.
|
||
[clinic start generated code]*/
|
||
|
||
static int
|
||
_io_BufferedReader___init___impl(buffered *self, PyObject *raw,
|
||
Py_ssize_t buffer_size)
|
||
/*[clinic end generated code: output=cddcfefa0ed294c4 input=fb887e06f11b4e48]*/
|
||
{
|
||
self->ok = 0;
|
||
self->detached = 0;
|
||
|
||
if (_PyIOBase_check_readable(raw, Py_True) == NULL)
|
||
return -1;
|
||
|
||
Py_INCREF(raw);
|
||
Py_XSETREF(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 && _PyIO_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 = NULL, *data = NULL, *tmp = NULL, *chunks = 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)
|
||
return NULL;
|
||
self->pos += current_size;
|
||
}
|
||
/* We're going past the buffer's bounds, flush it */
|
||
if (self->writable) {
|
||
tmp = buffered_flush_and_rewind_unlocked(self);
|
||
if (tmp == NULL)
|
||
goto cleanup;
|
||
Py_CLEAR(tmp);
|
||
}
|
||
_bufferedreader_reset_buf(self);
|
||
|
||
if (PyObject_HasAttr(self->raw, _PyIO_str_readall)) {
|
||
tmp = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_readall, NULL);
|
||
if (tmp == NULL)
|
||
goto cleanup;
|
||
if (tmp != Py_None && !PyBytes_Check(tmp)) {
|
||
PyErr_SetString(PyExc_TypeError, "readall() should return bytes");
|
||
goto cleanup;
|
||
}
|
||
if (tmp == Py_None) {
|
||
if (current_size == 0) {
|
||
res = Py_None;
|
||
goto cleanup;
|
||
} else {
|
||
res = data;
|
||
goto cleanup;
|
||
}
|
||
}
|
||
else if (current_size) {
|
||
PyBytes_Concat(&data, tmp);
|
||
res = data;
|
||
goto cleanup;
|
||
}
|
||
else {
|
||
res = tmp;
|
||
goto cleanup;
|
||
}
|
||
}
|
||
|
||
chunks = PyList_New(0);
|
||
if (chunks == NULL)
|
||
goto cleanup;
|
||
|
||
while (1) {
|
||
if (data) {
|
||
if (PyList_Append(chunks, data) < 0)
|
||
goto cleanup;
|
||
Py_CLEAR(data);
|
||
}
|
||
|
||
/* Read until EOF or until read() would block. */
|
||
data = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_read, NULL);
|
||
if (data == NULL)
|
||
goto cleanup;
|
||
if (data != Py_None && !PyBytes_Check(data)) {
|
||
PyErr_SetString(PyExc_TypeError, "read() should return bytes");
|
||
goto cleanup;
|
||
}
|
||
if (data == Py_None || PyBytes_GET_SIZE(data) == 0) {
|
||
if (current_size == 0) {
|
||
res = data;
|
||
goto cleanup;
|
||
}
|
||
else {
|
||
tmp = _PyBytes_Join(_PyIO_empty_bytes, chunks);
|
||
res = tmp;
|
||
goto cleanup;
|
||
}
|
||
}
|
||
current_size += PyBytes_GET_SIZE(data);
|
||
if (self->abs_pos != -1)
|
||
self->abs_pos += PyBytes_GET_SIZE(data);
|
||
}
|
||
cleanup:
|
||
/* res is either NULL or a borrowed ref */
|
||
Py_XINCREF(res);
|
||
Py_XDECREF(data);
|
||
Py_XDECREF(tmp);
|
||
Py_XDECREF(chunks);
|
||
return res;
|
||
}
|
||
|
||
/* 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_RETURN_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_RETURN_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 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);
|
||
}
|
||
|
||
|
||
|
||
/*
|
||
* class BufferedWriter
|
||
*/
|
||
static void
|
||
_bufferedwriter_reset_buf(buffered *self)
|
||
{
|
||
self->write_pos = 0;
|
||
self->write_end = -1;
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io.BufferedWriter.__init__
|
||
raw: object
|
||
buffer_size: Py_ssize_t(c_default="DEFAULT_BUFFER_SIZE") = DEFAULT_BUFFER_SIZE
|
||
|
||
A buffer for a writeable sequential RawIO object.
|
||
|
||
The constructor creates a BufferedWriter for the given writeable raw
|
||
stream. If the buffer_size is not given, it defaults to
|
||
DEFAULT_BUFFER_SIZE.
|
||
[clinic start generated code]*/
|
||
|
||
static int
|
||
_io_BufferedWriter___init___impl(buffered *self, PyObject *raw,
|
||
Py_ssize_t buffer_size)
|
||
/*[clinic end generated code: output=c8942a020c0dee64 input=914be9b95e16007b]*/
|
||
{
|
||
self->ok = 0;
|
||
self->detached = 0;
|
||
|
||
if (_PyIOBase_check_writable(raw, Py_True) == NULL)
|
||
return -1;
|
||
|
||
Py_INCREF(raw);
|
||
Py_XSETREF(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;
|
||
int errnum;
|
||
/* 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 {
|
||
errno = 0;
|
||
res = PyObject_CallMethodObjArgs(self->raw, _PyIO_str_write, memobj, NULL);
|
||
errnum = errno;
|
||
} while (res == NULL && _PyIO_trap_eintr());
|
||
Py_DECREF(memobj);
|
||
if (res == NULL)
|
||
return -1;
|
||
if (res == Py_None) {
|
||
/* Non-blocking stream would have blocked. Special return code!
|
||
Being paranoid we reset errno in case it is changed by code
|
||
triggered by a decref. errno is used by _set_BlockingIOError(). */
|
||
Py_DECREF(res);
|
||
errno = errnum;
|
||
return -2;
|
||
}
|
||
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)
|
||
{
|
||
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) {
|
||
goto error;
|
||
}
|
||
else if (n == -2) {
|
||
_set_BlockingIOError("write could not complete without blocking",
|
||
0);
|
||
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;
|
||
}
|
||
|
||
_bufferedwriter_reset_buf(self);
|
||
|
||
end:
|
||
Py_RETURN_NONE;
|
||
|
||
error:
|
||
return NULL;
|
||
}
|
||
|
||
/*[clinic input]
|
||
_io.BufferedWriter.write
|
||
buffer: Py_buffer
|
||
/
|
||
[clinic start generated code]*/
|
||
|
||
static PyObject *
|
||
_io_BufferedWriter_write_impl(buffered *self, Py_buffer *buffer)
|
||
/*[clinic end generated code: output=7f8d1365759bfc6b input=dd87dd85fc7f8850]*/
|
||
{
|
||
PyObject *res = NULL;
|
||
Py_ssize_t written, avail, remaining;
|
||
Py_off_t offset;
|
||
|
||
CHECK_INITIALIZED(self)
|
||
if (IS_CLOSED(self)) {
|
||
PyErr_SetString(PyExc_ValueError, "write to closed file");
|
||
return NULL;
|
||
}
|
||
|
||
if (!ENTER_BUFFERED(self))
|
||
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 (buffer->len <= avail) {
|
||
memcpy(self->buffer + self->pos, buffer->buf, buffer->len);
|
||
if (!VALID_WRITE_BUFFER(self) || self->write_pos > self->pos) {
|
||
self->write_pos = self->pos;
|
||
}
|
||
ADJUST_POSITION(self, self->pos + buffer->len);
|
||
if (self->pos > self->write_end)
|
||
self->write_end = self->pos;
|
||
written = buffer->len;
|
||
goto end;
|
||
}
|
||
|
||
/* First write the current buffer */
|
||
res = _bufferedwriter_flush_unlocked(self);
|
||
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 (buffer->len <= avail) {
|
||
/* Everything can be buffered */
|
||
PyErr_Clear();
|
||
memcpy(self->buffer + self->write_end, buffer->buf, buffer->len);
|
||
self->write_end += buffer->len;
|
||
self->pos += buffer->len;
|
||
written = buffer->len;
|
||
goto end;
|
||
}
|
||
/* Buffer as much as possible. */
|
||
memcpy(self->buffer + self->write_end, buffer->buf, avail);
|
||
self->write_end += avail;
|
||
self->pos += avail;
|
||
/* XXX Modifying the existing exception e using the pointer w
|
||
will change e.characters_written but not e.args[2].
|
||
Therefore we just replace with a new error. */
|
||
_set_BlockingIOError("write could not complete without blocking",
|
||
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 = buffer->len;
|
||
written = 0;
|
||
while (remaining > self->buffer_size) {
|
||
Py_ssize_t n = _bufferedwriter_raw_write(
|
||
self, (char *) buffer->buf + written, buffer->len - written);
|
||
if (n == -1) {
|
||
goto error;
|
||
} else if (n == -2) {
|
||
/* Write failed because raw file is non-blocking */
|
||
if (remaining > self->buffer_size) {
|
||
/* Can't buffer everything, still buffer as much as possible */
|
||
memcpy(self->buffer,
|
||
(char *) buffer->buf + written, self->buffer_size);
|
||
self->raw_pos = 0;
|
||
ADJUST_POSITION(self, self->buffer_size);
|
||
self->write_end = self->buffer_size;
|
||
written += self->buffer_size;
|
||
_set_BlockingIOError("write could not complete without "
|
||
"blocking", written);
|
||
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 *) buffer->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)
|
||
return res;
|
||
}
|
||
|
||
|
||
|
||
/*
|
||
* BufferedRWPair
|
||
*/
|
||
|
||
/* 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;
|
||
|
||
/*[clinic input]
|
||
_io.BufferedRWPair.__init__
|
||
reader: object
|
||
writer: object
|
||
buffer_size: Py_ssize_t(c_default="DEFAULT_BUFFER_SIZE") = DEFAULT_BUFFER_SIZE
|
||
/
|
||
|
||
A buffered reader and writer object together.
|
||
|
||
A buffered reader object and buffered writer object put together to
|
||
form a sequential IO object that can read and write. This is typically
|
||
used with a socket or two-way pipe.
|
||
|
||
reader and writer are RawIOBase objects that are readable and
|
||
writeable respectively. If the buffer_size is omitted it defaults to
|
||
DEFAULT_BUFFER_SIZE.
|
||
[clinic start generated code]*/
|
||
|
||
static int
|
||
_io_BufferedRWPair___init___impl(rwpair *self, PyObject *reader,
|
||
PyObject *writer, Py_ssize_t buffer_size)
|
||
/*[clinic end generated code: output=327e73d1aee8f984 input=620d42d71f33a031]*/
|
||
{
|
||
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);
|
||
if (self->weakreflist != NULL)
|
||
PyObject_ClearWeakRefs((PyObject *)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, _Py_Identifier *name, PyObject *args)
|
||
{
|
||
PyObject *func, *ret;
|
||
if (self == NULL) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"I/O operation on uninitialized object");
|
||
return NULL;
|
||
}
|
||
|
||
func = _PyObject_GetAttrId((PyObject *)self, name);
|
||
if (func == NULL) {
|
||
PyErr_SetString(PyExc_AttributeError, name->string);
|
||
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, &PyId_read, args);
|
||
}
|
||
|
||
static PyObject *
|
||
bufferedrwpair_peek(rwpair *self, PyObject *args)
|
||
{
|
||
return _forward_call(self->reader, &PyId_peek, args);
|
||
}
|
||
|
||
static PyObject *
|
||
bufferedrwpair_read1(rwpair *self, PyObject *args)
|
||
{
|
||
return _forward_call(self->reader, &PyId_read1, args);
|
||
}
|
||
|
||
static PyObject *
|
||
bufferedrwpair_readinto(rwpair *self, PyObject *args)
|
||
{
|
||
return _forward_call(self->reader, &PyId_readinto, args);
|
||
}
|
||
|
||
static PyObject *
|
||
bufferedrwpair_readinto1(rwpair *self, PyObject *args)
|
||
{
|
||
return _forward_call(self->reader, &PyId_readinto1, args);
|
||
}
|
||
|
||
static PyObject *
|
||
bufferedrwpair_write(rwpair *self, PyObject *args)
|
||
{
|
||
return _forward_call(self->writer, &PyId_write, args);
|
||
}
|
||
|
||
static PyObject *
|
||
bufferedrwpair_flush(rwpair *self, PyObject *args)
|
||
{
|
||
return _forward_call(self->writer, &PyId_flush, args);
|
||
}
|
||
|
||
static PyObject *
|
||
bufferedrwpair_readable(rwpair *self, PyObject *args)
|
||
{
|
||
return _forward_call(self->reader, &PyId_readable, args);
|
||
}
|
||
|
||
static PyObject *
|
||
bufferedrwpair_writable(rwpair *self, PyObject *args)
|
||
{
|
||
return _forward_call(self->writer, &PyId_writable, args);
|
||
}
|
||
|
||
static PyObject *
|
||
bufferedrwpair_close(rwpair *self, PyObject *args)
|
||
{
|
||
PyObject *exc = NULL, *val, *tb;
|
||
PyObject *ret = _forward_call(self->writer, &PyId_close, args);
|
||
if (ret == NULL)
|
||
PyErr_Fetch(&exc, &val, &tb);
|
||
else
|
||
Py_DECREF(ret);
|
||
ret = _forward_call(self->reader, &PyId_close, args);
|
||
if (exc != NULL) {
|
||
_PyErr_ChainExceptions(exc, val, tb);
|
||
Py_CLEAR(ret);
|
||
}
|
||
return ret;
|
||
}
|
||
|
||
static PyObject *
|
||
bufferedrwpair_isatty(rwpair *self, PyObject *args)
|
||
{
|
||
PyObject *ret = _forward_call(self->writer, &PyId_isatty, args);
|
||
|
||
if (ret != Py_False) {
|
||
/* either True or exception */
|
||
return ret;
|
||
}
|
||
Py_DECREF(ret);
|
||
|
||
return _forward_call(self->reader, &PyId_isatty, args);
|
||
}
|
||
|
||
static PyObject *
|
||
bufferedrwpair_closed_get(rwpair *self, void *context)
|
||
{
|
||
if (self->writer == NULL) {
|
||
PyErr_SetString(PyExc_RuntimeError,
|
||
"the BufferedRWPair object is being garbage-collected");
|
||
return NULL;
|
||
}
|
||
return PyObject_GetAttr((PyObject *) self->writer, _PyIO_str_closed);
|
||
}
|
||
|
||
|
||
|
||
/*
|
||
* BufferedRandom
|
||
*/
|
||
|
||
/*[clinic input]
|
||
_io.BufferedRandom.__init__
|
||
raw: object
|
||
buffer_size: Py_ssize_t(c_default="DEFAULT_BUFFER_SIZE") = DEFAULT_BUFFER_SIZE
|
||
|
||
A buffered interface to random access streams.
|
||
|
||
The constructor creates a reader and writer for a seekable stream,
|
||
raw, given in the first argument. If the buffer_size is omitted it
|
||
defaults to DEFAULT_BUFFER_SIZE.
|
||
[clinic start generated code]*/
|
||
|
||
static int
|
||
_io_BufferedRandom___init___impl(buffered *self, PyObject *raw,
|
||
Py_ssize_t buffer_size)
|
||
/*[clinic end generated code: output=d3d64eb0f64e64a3 input=a4e818fb86d0e50c]*/
|
||
{
|
||
self->ok = 0;
|
||
self->detached = 0;
|
||
|
||
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_INCREF(raw);
|
||
Py_XSETREF(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;
|
||
}
|
||
|
||
#include "clinic/bufferedio.c.h"
|
||
|
||
|
||
static PyMethodDef bufferediobase_methods[] = {
|
||
_IO__BUFFEREDIOBASE_DETACH_METHODDEF
|
||
{"read", bufferediobase_read, METH_VARARGS, bufferediobase_read_doc},
|
||
{"read1", bufferediobase_read1, METH_VARARGS, bufferediobase_read1_doc},
|
||
_IO__BUFFEREDIOBASE_READINTO_METHODDEF
|
||
_IO__BUFFEREDIOBASE_READINTO1_METHODDEF
|
||
{"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
|
||
| Py_TPFLAGS_HAVE_FINALIZE, /*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 */
|
||
0, /* tp_free */
|
||
0, /* tp_is_gc */
|
||
0, /* tp_bases */
|
||
0, /* tp_mro */
|
||
0, /* tp_cache */
|
||
0, /* tp_subclasses */
|
||
0, /* tp_weaklist */
|
||
0, /* tp_del */
|
||
0, /* tp_version_tag */
|
||
0, /* tp_finalize */
|
||
};
|
||
|
||
|
||
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},
|
||
{"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},
|
||
|
||
_IO__BUFFERED_READ_METHODDEF
|
||
_IO__BUFFERED_PEEK_METHODDEF
|
||
_IO__BUFFERED_READ1_METHODDEF
|
||
_IO__BUFFERED_READINTO_METHODDEF
|
||
_IO__BUFFERED_READINTO1_METHODDEF
|
||
_IO__BUFFERED_READLINE_METHODDEF
|
||
_IO__BUFFERED_SEEK_METHODDEF
|
||
{"tell", (PyCFunction)buffered_tell, METH_NOARGS},
|
||
_IO__BUFFERED_TRUNCATE_METHODDEF
|
||
{"__sizeof__", (PyCFunction)buffered_sizeof, METH_NOARGS},
|
||
{NULL, NULL}
|
||
};
|
||
|
||
static PyMemberDef bufferedreader_members[] = {
|
||
{"raw", T_OBJECT, offsetof(buffered, raw), READONLY},
|
||
{"_finalizing", T_BOOL, offsetof(buffered, finalizing), 0},
|
||
{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 | Py_TPFLAGS_HAVE_FINALIZE, /*tp_flags*/
|
||
_io_BufferedReader___init____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 */
|
||
_io_BufferedReader___init__, /* tp_init */
|
||
0, /* tp_alloc */
|
||
PyType_GenericNew, /* tp_new */
|
||
0, /* tp_free */
|
||
0, /* tp_is_gc */
|
||
0, /* tp_bases */
|
||
0, /* tp_mro */
|
||
0, /* tp_cache */
|
||
0, /* tp_subclasses */
|
||
0, /* tp_weaklist */
|
||
0, /* tp_del */
|
||
0, /* tp_version_tag */
|
||
0, /* tp_finalize */
|
||
};
|
||
|
||
|
||
static PyMethodDef bufferedwriter_methods[] = {
|
||
/* BufferedIOMixin methods */
|
||
{"close", (PyCFunction)buffered_close, METH_NOARGS},
|
||
{"detach", (PyCFunction)buffered_detach, METH_NOARGS},
|
||
{"seekable", (PyCFunction)buffered_seekable, 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},
|
||
|
||
_IO_BUFFEREDWRITER_WRITE_METHODDEF
|
||
_IO__BUFFERED_TRUNCATE_METHODDEF
|
||
{"flush", (PyCFunction)buffered_flush, METH_NOARGS},
|
||
_IO__BUFFERED_SEEK_METHODDEF
|
||
{"tell", (PyCFunction)buffered_tell, METH_NOARGS},
|
||
{"__sizeof__", (PyCFunction)buffered_sizeof, METH_NOARGS},
|
||
{NULL, NULL}
|
||
};
|
||
|
||
static PyMemberDef bufferedwriter_members[] = {
|
||
{"raw", T_OBJECT, offsetof(buffered, raw), READONLY},
|
||
{"_finalizing", T_BOOL, offsetof(buffered, finalizing), 0},
|
||
{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 | Py_TPFLAGS_HAVE_FINALIZE, /*tp_flags*/
|
||
_io_BufferedWriter___init____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 */
|
||
_io_BufferedWriter___init__, /* tp_init */
|
||
0, /* tp_alloc */
|
||
PyType_GenericNew, /* tp_new */
|
||
0, /* tp_free */
|
||
0, /* tp_is_gc */
|
||
0, /* tp_bases */
|
||
0, /* tp_mro */
|
||
0, /* tp_cache */
|
||
0, /* tp_subclasses */
|
||
0, /* tp_weaklist */
|
||
0, /* tp_del */
|
||
0, /* tp_version_tag */
|
||
0, /* tp_finalize */
|
||
};
|
||
|
||
|
||
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},
|
||
{"readinto1", (PyCFunction)bufferedrwpair_readinto1, 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 | Py_TPFLAGS_HAVE_FINALIZE, /* tp_flags */
|
||
_io_BufferedRWPair___init____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 */
|
||
_io_BufferedRWPair___init__, /* tp_init */
|
||
0, /* tp_alloc */
|
||
PyType_GenericNew, /* tp_new */
|
||
0, /* tp_free */
|
||
0, /* tp_is_gc */
|
||
0, /* tp_bases */
|
||
0, /* tp_mro */
|
||
0, /* tp_cache */
|
||
0, /* tp_subclasses */
|
||
0, /* tp_weaklist */
|
||
0, /* tp_del */
|
||
0, /* tp_version_tag */
|
||
0, /* tp_finalize */
|
||
};
|
||
|
||
|
||
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},
|
||
|
||
_IO__BUFFERED_SEEK_METHODDEF
|
||
{"tell", (PyCFunction)buffered_tell, METH_NOARGS},
|
||
_IO__BUFFERED_TRUNCATE_METHODDEF
|
||
_IO__BUFFERED_READ_METHODDEF
|
||
_IO__BUFFERED_READ1_METHODDEF
|
||
_IO__BUFFERED_READINTO_METHODDEF
|
||
_IO__BUFFERED_READINTO1_METHODDEF
|
||
_IO__BUFFERED_READLINE_METHODDEF
|
||
_IO__BUFFERED_PEEK_METHODDEF
|
||
_IO_BUFFEREDWRITER_WRITE_METHODDEF
|
||
{"__sizeof__", (PyCFunction)buffered_sizeof, METH_NOARGS},
|
||
{NULL, NULL}
|
||
};
|
||
|
||
static PyMemberDef bufferedrandom_members[] = {
|
||
{"raw", T_OBJECT, offsetof(buffered, raw), READONLY},
|
||
{"_finalizing", T_BOOL, offsetof(buffered, finalizing), 0},
|
||
{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 | Py_TPFLAGS_HAVE_FINALIZE, /*tp_flags*/
|
||
_io_BufferedRandom___init____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*/
|
||
_io_BufferedRandom___init__, /* tp_init */
|
||
0, /* tp_alloc */
|
||
PyType_GenericNew, /* tp_new */
|
||
0, /* tp_free */
|
||
0, /* tp_is_gc */
|
||
0, /* tp_bases */
|
||
0, /* tp_mro */
|
||
0, /* tp_cache */
|
||
0, /* tp_subclasses */
|
||
0, /* tp_weaklist */
|
||
0, /* tp_del */
|
||
0, /* tp_version_tag */
|
||
0, /* tp_finalize */
|
||
};
|