767 lines
25 KiB
C
767 lines
25 KiB
C
/*
|
||
An implementation of the new I/O lib as defined by PEP 3116 - "New I/O"
|
||
|
||
Classes defined here: UnsupportedOperation, BlockingIOError.
|
||
Functions defined here: open().
|
||
|
||
Mostly written by Amaury Forgeot d'Arc
|
||
*/
|
||
|
||
#define PY_SSIZE_T_CLEAN
|
||
#include "Python.h"
|
||
#include "structmember.h"
|
||
#include "_iomodule.h"
|
||
|
||
#ifdef HAVE_SYS_TYPES_H
|
||
#include <sys/types.h>
|
||
#endif /* HAVE_SYS_TYPES_H */
|
||
|
||
#ifdef HAVE_SYS_STAT_H
|
||
#include <sys/stat.h>
|
||
#endif /* HAVE_SYS_STAT_H */
|
||
|
||
|
||
/* Various interned strings */
|
||
|
||
PyObject *_PyIO_str_close;
|
||
PyObject *_PyIO_str_closed;
|
||
PyObject *_PyIO_str_decode;
|
||
PyObject *_PyIO_str_encode;
|
||
PyObject *_PyIO_str_fileno;
|
||
PyObject *_PyIO_str_flush;
|
||
PyObject *_PyIO_str_getstate;
|
||
PyObject *_PyIO_str_isatty;
|
||
PyObject *_PyIO_str_newlines;
|
||
PyObject *_PyIO_str_nl;
|
||
PyObject *_PyIO_str_read;
|
||
PyObject *_PyIO_str_read1;
|
||
PyObject *_PyIO_str_readable;
|
||
PyObject *_PyIO_str_readinto;
|
||
PyObject *_PyIO_str_readline;
|
||
PyObject *_PyIO_str_reset;
|
||
PyObject *_PyIO_str_seek;
|
||
PyObject *_PyIO_str_seekable;
|
||
PyObject *_PyIO_str_setstate;
|
||
PyObject *_PyIO_str_tell;
|
||
PyObject *_PyIO_str_truncate;
|
||
PyObject *_PyIO_str_writable;
|
||
PyObject *_PyIO_str_write;
|
||
|
||
PyObject *_PyIO_empty_str;
|
||
PyObject *_PyIO_empty_bytes;
|
||
PyObject *_PyIO_zero;
|
||
|
||
|
||
PyDoc_STRVAR(module_doc,
|
||
"The io module provides the Python interfaces to stream handling. The\n"
|
||
"builtin open function is defined in this module.\n"
|
||
"\n"
|
||
"At the top of the I/O hierarchy is the abstract base class IOBase. It\n"
|
||
"defines the basic interface to a stream. Note, however, that there is no\n"
|
||
"seperation between reading and writing to streams; implementations are\n"
|
||
"allowed to throw an IOError if they do not support a given operation.\n"
|
||
"\n"
|
||
"Extending IOBase is RawIOBase which deals simply with the reading and\n"
|
||
"writing of raw bytes to a stream. FileIO subclasses RawIOBase to provide\n"
|
||
"an interface to OS files.\n"
|
||
"\n"
|
||
"BufferedIOBase deals with buffering on a raw byte stream (RawIOBase). Its\n"
|
||
"subclasses, BufferedWriter, BufferedReader, and BufferedRWPair buffer\n"
|
||
"streams that are readable, writable, and both respectively.\n"
|
||
"BufferedRandom provides a buffered interface to random access\n"
|
||
"streams. BytesIO is a simple stream of in-memory bytes.\n"
|
||
"\n"
|
||
"Another IOBase subclass, TextIOBase, deals with the encoding and decoding\n"
|
||
"of streams into text. TextIOWrapper, which extends it, is a buffered text\n"
|
||
"interface to a buffered raw stream (`BufferedIOBase`). Finally, StringIO\n"
|
||
"is a in-memory stream for text.\n"
|
||
"\n"
|
||
"Argument names are not part of the specification, and only the arguments\n"
|
||
"of open() are intended to be used as keyword arguments.\n"
|
||
"\n"
|
||
"data:\n"
|
||
"\n"
|
||
"DEFAULT_BUFFER_SIZE\n"
|
||
"\n"
|
||
" An int containing the default buffer size used by the module's buffered\n"
|
||
" I/O classes. open() uses the file's blksize (as obtained by os.stat) if\n"
|
||
" possible.\n"
|
||
);
|
||
|
||
|
||
/*
|
||
* BlockingIOError extends IOError
|
||
*/
|
||
|
||
static int
|
||
blockingioerror_init(PyBlockingIOErrorObject *self, PyObject *args,
|
||
PyObject *kwds)
|
||
{
|
||
PyObject *myerrno = NULL, *strerror = NULL;
|
||
PyObject *baseargs = NULL;
|
||
Py_ssize_t written = 0;
|
||
|
||
assert(PyTuple_Check(args));
|
||
|
||
self->written = 0;
|
||
if (!PyArg_ParseTuple(args, "OO|n:BlockingIOError",
|
||
&myerrno, &strerror, &written))
|
||
return -1;
|
||
|
||
baseargs = PyTuple_Pack(2, myerrno, strerror);
|
||
if (baseargs == NULL)
|
||
return -1;
|
||
/* This will take care of initializing of myerrno and strerror members */
|
||
if (((PyTypeObject *)PyExc_IOError)->tp_init(
|
||
(PyObject *)self, baseargs, kwds) == -1) {
|
||
Py_DECREF(baseargs);
|
||
return -1;
|
||
}
|
||
Py_DECREF(baseargs);
|
||
|
||
self->written = written;
|
||
return 0;
|
||
}
|
||
|
||
static PyMemberDef blockingioerror_members[] = {
|
||
{"characters_written", T_PYSSIZET, offsetof(PyBlockingIOErrorObject, written), 0},
|
||
{NULL} /* Sentinel */
|
||
};
|
||
|
||
static PyTypeObject _PyExc_BlockingIOError = {
|
||
PyVarObject_HEAD_INIT(NULL, 0)
|
||
"BlockingIOError", /*tp_name*/
|
||
sizeof(PyBlockingIOErrorObject), /*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*/
|
||
PyDoc_STR("Exception raised when I/O would block "
|
||
"on a non-blocking I/O stream"), /* tp_doc */
|
||
0, /* tp_traverse */
|
||
0, /* tp_clear */
|
||
0, /* tp_richcompare */
|
||
0, /* tp_weaklistoffset */
|
||
0, /* tp_iter */
|
||
0, /* tp_iternext */
|
||
0, /* tp_methods */
|
||
blockingioerror_members, /* tp_members */
|
||
0, /* tp_getset */
|
||
0, /* tp_base */
|
||
0, /* tp_dict */
|
||
0, /* tp_descr_get */
|
||
0, /* tp_descr_set */
|
||
0, /* tp_dictoffset */
|
||
(initproc)blockingioerror_init, /* tp_init */
|
||
0, /* tp_alloc */
|
||
0, /* tp_new */
|
||
};
|
||
PyObject *PyExc_BlockingIOError = (PyObject *)&_PyExc_BlockingIOError;
|
||
|
||
|
||
/*
|
||
* The main open() function
|
||
*/
|
||
PyDoc_STRVAR(open_doc,
|
||
"Open file and return a stream. Raise IOError upon failure.\n"
|
||
"\n"
|
||
"file is either a text or byte string giving the name (and the path\n"
|
||
"if the file isn't in the current working directory) of the file to\n"
|
||
"be opened or an integer file descriptor of the file to be\n"
|
||
"wrapped. (If a file descriptor is given, it is closed when the\n"
|
||
"returned I/O object is closed, unless closefd is set to False.)\n"
|
||
"\n"
|
||
"mode is an optional string that specifies the mode in which the file\n"
|
||
"is opened. It defaults to 'r' which means open for reading in text\n"
|
||
"mode. Other common values are 'w' for writing (truncating the file if\n"
|
||
"it already exists), and 'a' for appending (which on some Unix systems,\n"
|
||
"means that all writes append to the end of the file regardless of the\n"
|
||
"current seek position). In text mode, if encoding is not specified the\n"
|
||
"encoding used is platform dependent. (For reading and writing raw\n"
|
||
"bytes use binary mode and leave encoding unspecified.) The available\n"
|
||
"modes are:\n"
|
||
"\n"
|
||
"========= ===============================================================\n"
|
||
"Character Meaning\n"
|
||
"--------- ---------------------------------------------------------------\n"
|
||
"'r' open for reading (default)\n"
|
||
"'w' open for writing, truncating the file first\n"
|
||
"'a' open for writing, appending to the end of the file if it exists\n"
|
||
"'b' binary mode\n"
|
||
"'t' text mode (default)\n"
|
||
"'+' open a disk file for updating (reading and writing)\n"
|
||
"'U' universal newline mode (for backwards compatibility; unneeded\n"
|
||
" for new code)\n"
|
||
"========= ===============================================================\n"
|
||
"\n"
|
||
"The default mode is 'rt' (open for reading text). For binary random\n"
|
||
"access, the mode 'w+b' opens and truncates the file to 0 bytes, while\n"
|
||
"'r+b' opens the file without truncation.\n"
|
||
"\n"
|
||
"Python distinguishes between files opened in binary and text modes,\n"
|
||
"even when the underlying operating system doesn't. Files opened in\n"
|
||
"binary mode (appending 'b' to the mode argument) return contents as\n"
|
||
"bytes objects without any decoding. In text mode (the default, or when\n"
|
||
"'t' is appended to the mode argument), the contents of the file are\n"
|
||
"returned as strings, the bytes having been first decoded using a\n"
|
||
"platform-dependent encoding or using the specified encoding if given.\n"
|
||
"\n"
|
||
"buffering is an optional integer used to set the buffering policy. By\n"
|
||
"default full buffering is on. Pass 0 to switch buffering off (only\n"
|
||
"allowed in binary mode), 1 to set line buffering, and an integer > 1\n"
|
||
"for full buffering.\n"
|
||
"\n"
|
||
"encoding is the name of the encoding used to decode or encode the\n"
|
||
"file. This should only be used in text mode. The default encoding is\n"
|
||
"platform dependent, but any encoding supported by Python can be\n"
|
||
"passed. See the codecs module for the list of supported encodings.\n"
|
||
"\n"
|
||
"errors is an optional string that specifies how encoding errors are to\n"
|
||
"be handled---this argument should not be used in binary mode. Pass\n"
|
||
"'strict' to raise a ValueError exception if there is an encoding error\n"
|
||
"(the default of None has the same effect), or pass 'ignore' to ignore\n"
|
||
"errors. (Note that ignoring encoding errors can lead to data loss.)\n"
|
||
"See the documentation for codecs.register for a list of the permitted\n"
|
||
"encoding error strings.\n"
|
||
"\n"
|
||
"newline controls how universal newlines works (it only applies to text\n"
|
||
"mode). It can be None, '', '\\n', '\\r', and '\\r\\n'. It works as\n"
|
||
"follows:\n"
|
||
"\n"
|
||
"* On input, if newline is None, universal newlines mode is\n"
|
||
" enabled. Lines in the input can end in '\\n', '\\r', or '\\r\\n', and\n"
|
||
" these are translated into '\\n' before being returned to the\n"
|
||
" caller. If it is '', universal newline mode is enabled, but line\n"
|
||
" endings are returned to the caller untranslated. If it has any of\n"
|
||
" the other legal values, input lines are only terminated by the given\n"
|
||
" string, and the line ending is returned to the caller untranslated.\n"
|
||
"\n"
|
||
"* On output, if newline is None, any '\\n' characters written are\n"
|
||
" translated to the system default line separator, os.linesep. If\n"
|
||
" newline is '', no translation takes place. If newline is any of the\n"
|
||
" other legal values, any '\\n' characters written are translated to\n"
|
||
" the given string.\n"
|
||
"\n"
|
||
"If closefd is False, the underlying file descriptor will be kept open\n"
|
||
"when the file is closed. This does not work when a file name is given\n"
|
||
"and must be True in that case.\n"
|
||
"\n"
|
||
"open() returns a file object whose type depends on the mode, and\n"
|
||
"through which the standard file operations such as reading and writing\n"
|
||
"are performed. When open() is used to open a file in a text mode ('w',\n"
|
||
"'r', 'wt', 'rt', etc.), it returns a TextIOWrapper. When used to open\n"
|
||
"a file in a binary mode, the returned class varies: in read binary\n"
|
||
"mode, it returns a BufferedReader; in write binary and append binary\n"
|
||
"modes, it returns a BufferedWriter, and in read/write mode, it returns\n"
|
||
"a BufferedRandom.\n"
|
||
"\n"
|
||
"It is also possible to use a string or bytearray as a file for both\n"
|
||
"reading and writing. For strings StringIO can be used like a file\n"
|
||
"opened in a text mode, and for bytes a BytesIO can be used like a file\n"
|
||
"opened in a binary mode.\n"
|
||
);
|
||
|
||
static PyObject *
|
||
io_open(PyObject *self, PyObject *args, PyObject *kwds)
|
||
{
|
||
char *kwlist[] = {"file", "mode", "buffering",
|
||
"encoding", "errors", "newline",
|
||
"closefd", NULL};
|
||
PyObject *file;
|
||
char *mode = "r";
|
||
int buffering = -1, closefd = 1;
|
||
char *encoding = NULL, *errors = NULL, *newline = NULL;
|
||
unsigned i;
|
||
|
||
int reading = 0, writing = 0, appending = 0, updating = 0;
|
||
int text = 0, binary = 0, universal = 0;
|
||
|
||
char rawmode[5], *m;
|
||
int line_buffering, isatty;
|
||
|
||
PyObject *raw, *modeobj = NULL, *buffer = NULL, *wrapper = NULL;
|
||
|
||
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|sizzzi:open", kwlist,
|
||
&file, &mode, &buffering,
|
||
&encoding, &errors, &newline,
|
||
&closefd)) {
|
||
return NULL;
|
||
}
|
||
|
||
if (!PyUnicode_Check(file) &&
|
||
!PyBytes_Check(file) &&
|
||
!PyNumber_Check(file)) {
|
||
PyErr_Format(PyExc_TypeError, "invalid file: %R", file);
|
||
return NULL;
|
||
}
|
||
|
||
/* Decode mode */
|
||
for (i = 0; i < strlen(mode); i++) {
|
||
char c = mode[i];
|
||
|
||
switch (c) {
|
||
case 'r':
|
||
reading = 1;
|
||
break;
|
||
case 'w':
|
||
writing = 1;
|
||
break;
|
||
case 'a':
|
||
appending = 1;
|
||
break;
|
||
case '+':
|
||
updating = 1;
|
||
break;
|
||
case 't':
|
||
text = 1;
|
||
break;
|
||
case 'b':
|
||
binary = 1;
|
||
break;
|
||
case 'U':
|
||
universal = 1;
|
||
reading = 1;
|
||
break;
|
||
default:
|
||
goto invalid_mode;
|
||
}
|
||
|
||
/* c must not be duplicated */
|
||
if (strchr(mode+i+1, c)) {
|
||
invalid_mode:
|
||
PyErr_Format(PyExc_ValueError, "invalid mode: '%s'", mode);
|
||
return NULL;
|
||
}
|
||
|
||
}
|
||
|
||
m = rawmode;
|
||
if (reading) *(m++) = 'r';
|
||
if (writing) *(m++) = 'w';
|
||
if (appending) *(m++) = 'a';
|
||
if (updating) *(m++) = '+';
|
||
*m = '\0';
|
||
|
||
/* Parameters validation */
|
||
if (universal) {
|
||
if (writing || appending) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"can't use U and writing mode at once");
|
||
return NULL;
|
||
}
|
||
reading = 1;
|
||
}
|
||
|
||
if (text && binary) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"can't have text and binary mode at once");
|
||
return NULL;
|
||
}
|
||
|
||
if (reading + writing + appending > 1) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"must have exactly one of read/write/append mode");
|
||
return NULL;
|
||
}
|
||
|
||
if (binary && encoding != NULL) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"binary mode doesn't take an encoding argument");
|
||
return NULL;
|
||
}
|
||
|
||
if (binary && errors != NULL) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"binary mode doesn't take an errors argument");
|
||
return NULL;
|
||
}
|
||
|
||
if (binary && newline != NULL) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"binary mode doesn't take a newline argument");
|
||
return NULL;
|
||
}
|
||
|
||
/* Create the Raw file stream */
|
||
raw = PyObject_CallFunction((PyObject *)&PyFileIO_Type,
|
||
"Osi", file, rawmode, closefd);
|
||
if (raw == NULL)
|
||
return NULL;
|
||
|
||
modeobj = PyUnicode_FromString(mode);
|
||
if (modeobj == NULL)
|
||
goto error;
|
||
|
||
/* buffering */
|
||
{
|
||
PyObject *res = PyObject_CallMethod(raw, "isatty", NULL);
|
||
if (res == NULL)
|
||
goto error;
|
||
isatty = PyLong_AsLong(res);
|
||
Py_DECREF(res);
|
||
if (isatty == -1 && PyErr_Occurred())
|
||
goto error;
|
||
}
|
||
|
||
if (buffering == 1 || (buffering < 0 && isatty)) {
|
||
buffering = -1;
|
||
line_buffering = 1;
|
||
}
|
||
else
|
||
line_buffering = 0;
|
||
|
||
if (buffering < 0) {
|
||
buffering = DEFAULT_BUFFER_SIZE;
|
||
#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
|
||
{
|
||
struct stat st;
|
||
long fileno;
|
||
PyObject *res = PyObject_CallMethod(raw, "fileno", NULL);
|
||
if (res == NULL)
|
||
goto error;
|
||
|
||
fileno = PyLong_AsLong(res);
|
||
Py_DECREF(res);
|
||
if (fileno == -1 && PyErr_Occurred())
|
||
goto error;
|
||
|
||
if (fstat(fileno, &st) >= 0)
|
||
buffering = st.st_blksize;
|
||
}
|
||
#endif
|
||
}
|
||
if (buffering < 0) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"invalid buffering size");
|
||
goto error;
|
||
}
|
||
|
||
/* if not buffering, returns the raw file object */
|
||
if (buffering == 0) {
|
||
if (!binary) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"can't have unbuffered text I/O");
|
||
goto error;
|
||
}
|
||
|
||
Py_DECREF(modeobj);
|
||
return raw;
|
||
}
|
||
|
||
/* wraps into a buffered file */
|
||
{
|
||
PyObject *Buffered_class;
|
||
|
||
if (updating)
|
||
Buffered_class = (PyObject *)&PyBufferedRandom_Type;
|
||
else if (writing || appending)
|
||
Buffered_class = (PyObject *)&PyBufferedWriter_Type;
|
||
else if (reading)
|
||
Buffered_class = (PyObject *)&PyBufferedReader_Type;
|
||
else {
|
||
PyErr_Format(PyExc_ValueError,
|
||
"unknown mode: '%s'", mode);
|
||
goto error;
|
||
}
|
||
|
||
buffer = PyObject_CallFunction(Buffered_class, "Oi", raw, buffering);
|
||
}
|
||
Py_CLEAR(raw);
|
||
if (buffer == NULL)
|
||
goto error;
|
||
|
||
|
||
/* if binary, returns the buffered file */
|
||
if (binary) {
|
||
Py_DECREF(modeobj);
|
||
return buffer;
|
||
}
|
||
|
||
/* wraps into a TextIOWrapper */
|
||
wrapper = PyObject_CallFunction((PyObject *)&PyTextIOWrapper_Type,
|
||
"Osssi",
|
||
buffer,
|
||
encoding, errors, newline,
|
||
line_buffering);
|
||
Py_CLEAR(buffer);
|
||
if (wrapper == NULL)
|
||
goto error;
|
||
|
||
if (PyObject_SetAttrString(wrapper, "mode", modeobj) < 0)
|
||
goto error;
|
||
Py_DECREF(modeobj);
|
||
return wrapper;
|
||
|
||
error:
|
||
Py_XDECREF(raw);
|
||
Py_XDECREF(modeobj);
|
||
Py_XDECREF(buffer);
|
||
Py_XDECREF(wrapper);
|
||
return NULL;
|
||
}
|
||
|
||
/*
|
||
* Private helpers for the io module.
|
||
*/
|
||
|
||
Py_off_t
|
||
PyNumber_AsOff_t(PyObject *item, PyObject *err)
|
||
{
|
||
Py_off_t result;
|
||
PyObject *runerr;
|
||
PyObject *value = PyNumber_Index(item);
|
||
if (value == NULL)
|
||
return -1;
|
||
|
||
/* We're done if PyLong_AsSsize_t() returns without error. */
|
||
result = PyLong_AsOff_t(value);
|
||
if (result != -1 || !(runerr = PyErr_Occurred()))
|
||
goto finish;
|
||
|
||
/* Error handling code -- only manage OverflowError differently */
|
||
if (!PyErr_GivenExceptionMatches(runerr, PyExc_OverflowError))
|
||
goto finish;
|
||
|
||
PyErr_Clear();
|
||
/* If no error-handling desired then the default clipping
|
||
is sufficient.
|
||
*/
|
||
if (!err) {
|
||
assert(PyLong_Check(value));
|
||
/* Whether or not it is less than or equal to
|
||
zero is determined by the sign of ob_size
|
||
*/
|
||
if (_PyLong_Sign(value) < 0)
|
||
result = PY_OFF_T_MIN;
|
||
else
|
||
result = PY_OFF_T_MAX;
|
||
}
|
||
else {
|
||
/* Otherwise replace the error with caller's error object. */
|
||
PyErr_Format(err,
|
||
"cannot fit '%.200s' into an offset-sized integer",
|
||
item->ob_type->tp_name);
|
||
}
|
||
|
||
finish:
|
||
Py_DECREF(value);
|
||
return result;
|
||
}
|
||
|
||
static int
|
||
iomodule_traverse(PyObject *mod, visitproc visit, void *arg) {
|
||
_PyIO_State *state = IO_MOD_STATE(mod);
|
||
if (!state->initialized)
|
||
return 0;
|
||
Py_VISIT(state->os_module);
|
||
if (state->locale_module != NULL) {
|
||
Py_VISIT(state->locale_module);
|
||
}
|
||
Py_VISIT(state->unsupported_operation);
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
iomodule_clear(PyObject *mod) {
|
||
_PyIO_State *state = IO_MOD_STATE(mod);
|
||
if (!state->initialized)
|
||
return 0;
|
||
Py_CLEAR(state->os_module);
|
||
if (state->locale_module != NULL)
|
||
Py_CLEAR(state->locale_module);
|
||
Py_CLEAR(state->unsupported_operation);
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
iomodule_free(PyObject *mod) {
|
||
iomodule_clear(mod);
|
||
}
|
||
|
||
/*
|
||
* Module definition
|
||
*/
|
||
|
||
static PyMethodDef module_methods[] = {
|
||
{"open", (PyCFunction)io_open, METH_VARARGS|METH_KEYWORDS, open_doc},
|
||
{NULL, NULL}
|
||
};
|
||
|
||
struct PyModuleDef _PyIO_Module = {
|
||
PyModuleDef_HEAD_INIT,
|
||
"io",
|
||
module_doc,
|
||
sizeof(_PyIO_State),
|
||
module_methods,
|
||
NULL,
|
||
iomodule_traverse,
|
||
iomodule_clear,
|
||
(freefunc)iomodule_free,
|
||
};
|
||
|
||
PyMODINIT_FUNC
|
||
PyInit__io(void)
|
||
{
|
||
PyObject *m = PyModule_Create(&_PyIO_Module);
|
||
_PyIO_State *state = NULL;
|
||
if (m == NULL)
|
||
return NULL;
|
||
state = IO_MOD_STATE(m);
|
||
state->initialized = 0;
|
||
|
||
/* put os in the module state */
|
||
state->os_module = PyImport_ImportModule("os");
|
||
if (state->os_module == NULL)
|
||
goto fail;
|
||
|
||
#define ADD_TYPE(type, name) \
|
||
if (PyType_Ready(type) < 0) \
|
||
goto fail; \
|
||
Py_INCREF(type); \
|
||
if (PyModule_AddObject(m, name, (PyObject *)type) < 0) { \
|
||
Py_DECREF(type); \
|
||
goto fail; \
|
||
}
|
||
|
||
/* DEFAULT_BUFFER_SIZE */
|
||
if (PyModule_AddIntMacro(m, DEFAULT_BUFFER_SIZE) < 0)
|
||
goto fail;
|
||
|
||
/* UnsupportedOperation inherits from ValueError and IOError */
|
||
state->unsupported_operation = PyObject_CallFunction(
|
||
(PyObject *)&PyType_Type, "s(OO){}",
|
||
"UnsupportedOperation", PyExc_ValueError, PyExc_IOError);
|
||
if (state->unsupported_operation == NULL)
|
||
goto fail;
|
||
Py_INCREF(state->unsupported_operation);
|
||
if (PyModule_AddObject(m, "UnsupportedOperation",
|
||
state->unsupported_operation) < 0)
|
||
goto fail;
|
||
|
||
/* BlockingIOError */
|
||
_PyExc_BlockingIOError.tp_base = (PyTypeObject *) PyExc_IOError;
|
||
ADD_TYPE(&_PyExc_BlockingIOError, "BlockingIOError");
|
||
|
||
/* Concrete base types of the IO ABCs.
|
||
(the ABCs themselves are declared through inheritance in io.py)
|
||
*/
|
||
ADD_TYPE(&PyIOBase_Type, "_IOBase");
|
||
ADD_TYPE(&PyRawIOBase_Type, "_RawIOBase");
|
||
ADD_TYPE(&PyBufferedIOBase_Type, "_BufferedIOBase");
|
||
ADD_TYPE(&PyTextIOBase_Type, "_TextIOBase");
|
||
|
||
/* Implementation of concrete IO objects. */
|
||
/* FileIO */
|
||
PyFileIO_Type.tp_base = &PyRawIOBase_Type;
|
||
ADD_TYPE(&PyFileIO_Type, "FileIO");
|
||
|
||
/* BytesIO */
|
||
PyBytesIO_Type.tp_base = &PyBufferedIOBase_Type;
|
||
ADD_TYPE(&PyBytesIO_Type, "BytesIO");
|
||
|
||
/* StringIO */
|
||
PyStringIO_Type.tp_base = &PyTextIOBase_Type;
|
||
ADD_TYPE(&PyStringIO_Type, "StringIO");
|
||
|
||
/* BufferedReader */
|
||
PyBufferedReader_Type.tp_base = &PyBufferedIOBase_Type;
|
||
ADD_TYPE(&PyBufferedReader_Type, "BufferedReader");
|
||
|
||
/* BufferedWriter */
|
||
PyBufferedWriter_Type.tp_base = &PyBufferedIOBase_Type;
|
||
ADD_TYPE(&PyBufferedWriter_Type, "BufferedWriter");
|
||
|
||
/* BufferedRWPair */
|
||
PyBufferedRWPair_Type.tp_base = &PyBufferedIOBase_Type;
|
||
ADD_TYPE(&PyBufferedRWPair_Type, "BufferedRWPair");
|
||
|
||
/* BufferedRandom */
|
||
PyBufferedRandom_Type.tp_base = &PyBufferedIOBase_Type;
|
||
ADD_TYPE(&PyBufferedRandom_Type, "BufferedRandom");
|
||
|
||
/* TextIOWrapper */
|
||
PyTextIOWrapper_Type.tp_base = &PyTextIOBase_Type;
|
||
ADD_TYPE(&PyTextIOWrapper_Type, "TextIOWrapper");
|
||
|
||
/* IncrementalNewlineDecoder */
|
||
ADD_TYPE(&PyIncrementalNewlineDecoder_Type, "IncrementalNewlineDecoder");
|
||
|
||
/* Interned strings */
|
||
if (!(_PyIO_str_close = PyUnicode_InternFromString("close")))
|
||
goto fail;
|
||
if (!(_PyIO_str_closed = PyUnicode_InternFromString("closed")))
|
||
goto fail;
|
||
if (!(_PyIO_str_decode = PyUnicode_InternFromString("decode")))
|
||
goto fail;
|
||
if (!(_PyIO_str_encode = PyUnicode_InternFromString("encode")))
|
||
goto fail;
|
||
if (!(_PyIO_str_fileno = PyUnicode_InternFromString("fileno")))
|
||
goto fail;
|
||
if (!(_PyIO_str_flush = PyUnicode_InternFromString("flush")))
|
||
goto fail;
|
||
if (!(_PyIO_str_getstate = PyUnicode_InternFromString("getstate")))
|
||
goto fail;
|
||
if (!(_PyIO_str_isatty = PyUnicode_InternFromString("isatty")))
|
||
goto fail;
|
||
if (!(_PyIO_str_newlines = PyUnicode_InternFromString("newlines")))
|
||
goto fail;
|
||
if (!(_PyIO_str_nl = PyUnicode_InternFromString("\n")))
|
||
goto fail;
|
||
if (!(_PyIO_str_read = PyUnicode_InternFromString("read")))
|
||
goto fail;
|
||
if (!(_PyIO_str_read1 = PyUnicode_InternFromString("read1")))
|
||
goto fail;
|
||
if (!(_PyIO_str_readable = PyUnicode_InternFromString("readable")))
|
||
goto fail;
|
||
if (!(_PyIO_str_readinto = PyUnicode_InternFromString("readinto")))
|
||
goto fail;
|
||
if (!(_PyIO_str_readline = PyUnicode_InternFromString("readline")))
|
||
goto fail;
|
||
if (!(_PyIO_str_reset = PyUnicode_InternFromString("reset")))
|
||
goto fail;
|
||
if (!(_PyIO_str_seek = PyUnicode_InternFromString("seek")))
|
||
goto fail;
|
||
if (!(_PyIO_str_seekable = PyUnicode_InternFromString("seekable")))
|
||
goto fail;
|
||
if (!(_PyIO_str_setstate = PyUnicode_InternFromString("setstate")))
|
||
goto fail;
|
||
if (!(_PyIO_str_tell = PyUnicode_InternFromString("tell")))
|
||
goto fail;
|
||
if (!(_PyIO_str_truncate = PyUnicode_InternFromString("truncate")))
|
||
goto fail;
|
||
if (!(_PyIO_str_write = PyUnicode_InternFromString("write")))
|
||
goto fail;
|
||
if (!(_PyIO_str_writable = PyUnicode_InternFromString("writable")))
|
||
goto fail;
|
||
|
||
if (!(_PyIO_empty_str = PyUnicode_FromStringAndSize(NULL, 0)))
|
||
goto fail;
|
||
if (!(_PyIO_empty_bytes = PyBytes_FromStringAndSize(NULL, 0)))
|
||
goto fail;
|
||
if (!(_PyIO_zero = PyLong_FromLong(0L)))
|
||
goto fail;
|
||
|
||
state->initialized = 1;
|
||
|
||
return m;
|
||
|
||
fail:
|
||
Py_XDECREF(state->os_module);
|
||
Py_XDECREF(state->unsupported_operation);
|
||
Py_DECREF(m);
|
||
return NULL;
|
||
}
|