726 lines
23 KiB
C
726 lines
23 KiB
C
/*
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An implementation of the new I/O lib as defined by PEP 3116 - "New I/O"
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Classes defined here: UnsupportedOperation, BlockingIOError.
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Functions defined here: open().
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Mostly written by Amaury Forgeot d'Arc
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*/
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#define PY_SSIZE_T_CLEAN
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#include "Python.h"
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#include "structmember.h"
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#include "_iomodule.h"
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif /* HAVE_SYS_TYPES_H */
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif /* HAVE_SYS_STAT_H */
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/* Various interned strings */
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PyObject *_PyIO_str_close;
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PyObject *_PyIO_str_closed;
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PyObject *_PyIO_str_decode;
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PyObject *_PyIO_str_encode;
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PyObject *_PyIO_str_fileno;
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PyObject *_PyIO_str_flush;
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PyObject *_PyIO_str_getstate;
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PyObject *_PyIO_str_isatty;
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PyObject *_PyIO_str_newlines;
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PyObject *_PyIO_str_nl;
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PyObject *_PyIO_str_read;
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PyObject *_PyIO_str_read1;
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PyObject *_PyIO_str_readable;
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PyObject *_PyIO_str_readall;
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PyObject *_PyIO_str_readinto;
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PyObject *_PyIO_str_readline;
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PyObject *_PyIO_str_reset;
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PyObject *_PyIO_str_seek;
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PyObject *_PyIO_str_seekable;
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PyObject *_PyIO_str_setstate;
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PyObject *_PyIO_str_tell;
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PyObject *_PyIO_str_truncate;
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PyObject *_PyIO_str_writable;
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PyObject *_PyIO_str_write;
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PyObject *_PyIO_empty_str;
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PyObject *_PyIO_empty_bytes;
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PyObject *_PyIO_zero;
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PyDoc_STRVAR(module_doc,
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"The io module provides the Python interfaces to stream handling. The\n"
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"builtin open function is defined in this module.\n"
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"\n"
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"At the top of the I/O hierarchy is the abstract base class IOBase. It\n"
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"defines the basic interface to a stream. Note, however, that there is no\n"
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"separation between reading and writing to streams; implementations are\n"
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"allowed to raise an IOError if they do not support a given operation.\n"
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"\n"
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"Extending IOBase is RawIOBase which deals simply with the reading and\n"
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"writing of raw bytes to a stream. FileIO subclasses RawIOBase to provide\n"
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"an interface to OS files.\n"
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"\n"
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"BufferedIOBase deals with buffering on a raw byte stream (RawIOBase). Its\n"
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"subclasses, BufferedWriter, BufferedReader, and BufferedRWPair buffer\n"
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"streams that are readable, writable, and both respectively.\n"
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"BufferedRandom provides a buffered interface to random access\n"
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"streams. BytesIO is a simple stream of in-memory bytes.\n"
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"\n"
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"Another IOBase subclass, TextIOBase, deals with the encoding and decoding\n"
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"of streams into text. TextIOWrapper, which extends it, is a buffered text\n"
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"interface to a buffered raw stream (`BufferedIOBase`). Finally, StringIO\n"
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"is a in-memory stream for text.\n"
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"\n"
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"Argument names are not part of the specification, and only the arguments\n"
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"of open() are intended to be used as keyword arguments.\n"
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"\n"
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"data:\n"
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"\n"
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"DEFAULT_BUFFER_SIZE\n"
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"\n"
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" An int containing the default buffer size used by the module's buffered\n"
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" I/O classes. open() uses the file's blksize (as obtained by os.stat) if\n"
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" possible.\n"
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);
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/*
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* The main open() function
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*/
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PyDoc_STRVAR(open_doc,
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"open(file, mode='r', buffering=-1, encoding=None,\n"
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" errors=None, newline=None, closefd=True, opener=None) -> file object\n"
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"\n"
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"Open file and return a stream. Raise IOError upon failure.\n"
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"\n"
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"file is either a text or byte string giving the name (and the path\n"
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"if the file isn't in the current working directory) of the file to\n"
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"be opened or an integer file descriptor of the file to be\n"
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"wrapped. (If a file descriptor is given, it is closed when the\n"
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"returned I/O object is closed, unless closefd is set to False.)\n"
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"\n"
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"mode is an optional string that specifies the mode in which the file\n"
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"is opened. It defaults to 'r' which means open for reading in text\n"
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"mode. Other common values are 'w' for writing (truncating the file if\n"
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"it already exists), 'x' for creating and writing to a new file, and\n"
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"'a' for appending (which on some Unix systems, means that all writes\n"
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"append to the end of the file regardless of the current seek position).\n"
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"In text mode, if encoding is not specified the encoding used is platform\n"
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"dependent: locale.getpreferredencoding(False) is called to get the\n"
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"current locale encoding. (For reading and writing raw bytes use binary\n"
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"mode and leave encoding unspecified.) The available modes are:\n"
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"\n"
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"========= ===============================================================\n"
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"Character Meaning\n"
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"--------- ---------------------------------------------------------------\n"
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"'r' open for reading (default)\n"
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"'w' open for writing, truncating the file first\n"
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"'x' create a new file and open it for writing\n"
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"'a' open for writing, appending to the end of the file if it exists\n"
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"'b' binary mode\n"
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"'t' text mode (default)\n"
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"'+' open a disk file for updating (reading and writing)\n"
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"'U' universal newline mode (for backwards compatibility; unneeded\n"
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" for new code)\n"
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"========= ===============================================================\n"
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"\n"
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"The default mode is 'rt' (open for reading text). For binary random\n"
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"access, the mode 'w+b' opens and truncates the file to 0 bytes, while\n"
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"'r+b' opens the file without truncation. The 'x' mode implies 'w' and\n"
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"raises an `FileExistsError` if the file already exists.\n"
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"\n"
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"Python distinguishes between files opened in binary and text modes,\n"
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"even when the underlying operating system doesn't. Files opened in\n"
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"binary mode (appending 'b' to the mode argument) return contents as\n"
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"bytes objects without any decoding. In text mode (the default, or when\n"
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"'t' is appended to the mode argument), the contents of the file are\n"
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"returned as strings, the bytes having been first decoded using a\n"
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"platform-dependent encoding or using the specified encoding if given.\n"
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"\n"
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"buffering is an optional integer used to set the buffering policy.\n"
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"Pass 0 to switch buffering off (only allowed in binary mode), 1 to select\n"
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"line buffering (only usable in text mode), and an integer > 1 to indicate\n"
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"the size of a fixed-size chunk buffer. When no buffering argument is\n"
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"given, the default buffering policy works as follows:\n"
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"\n"
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"* Binary files are buffered in fixed-size chunks; the size of the buffer\n"
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" is chosen using a heuristic trying to determine the underlying device's\n"
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" \"block size\" and falling back on `io.DEFAULT_BUFFER_SIZE`.\n"
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" On many systems, the buffer will typically be 4096 or 8192 bytes long.\n"
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"\n"
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"* \"Interactive\" text files (files for which isatty() returns True)\n"
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" use line buffering. Other text files use the policy described above\n"
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" for binary files.\n"
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"\n"
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"encoding is the name of the encoding used to decode or encode the\n"
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"file. This should only be used in text mode. The default encoding is\n"
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"platform dependent, but any encoding supported by Python can be\n"
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"passed. See the codecs module for the list of supported encodings.\n"
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"\n"
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"errors is an optional string that specifies how encoding errors are to\n"
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"be handled---this argument should not be used in binary mode. Pass\n"
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"'strict' to raise a ValueError exception if there is an encoding error\n"
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"(the default of None has the same effect), or pass 'ignore' to ignore\n"
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"errors. (Note that ignoring encoding errors can lead to data loss.)\n"
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"See the documentation for codecs.register for a list of the permitted\n"
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"encoding error strings.\n"
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"\n"
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"newline controls how universal newlines works (it only applies to text\n"
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"mode). It can be None, '', '\\n', '\\r', and '\\r\\n'. It works as\n"
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"follows:\n"
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"\n"
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"* On input, if newline is None, universal newlines mode is\n"
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" enabled. Lines in the input can end in '\\n', '\\r', or '\\r\\n', and\n"
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" these are translated into '\\n' before being returned to the\n"
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" caller. If it is '', universal newline mode is enabled, but line\n"
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" endings are returned to the caller untranslated. If it has any of\n"
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" the other legal values, input lines are only terminated by the given\n"
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" string, and the line ending is returned to the caller untranslated.\n"
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"\n"
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"* On output, if newline is None, any '\\n' characters written are\n"
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" translated to the system default line separator, os.linesep. If\n"
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" newline is '' or '\\n', no translation takes place. If newline is any\n"
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" of the other legal values, any '\\n' characters written are translated\n"
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" to the given string.\n"
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"\n"
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"If closefd is False, the underlying file descriptor will be kept open\n"
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"when the file is closed. This does not work when a file name is given\n"
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"and must be True in that case.\n"
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"\n"
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"A custom opener can be used by passing a callable as *opener*. The\n"
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"underlying file descriptor for the file object is then obtained by\n"
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"calling *opener* with (*file*, *flags*). *opener* must return an open\n"
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"file descriptor (passing os.open as *opener* results in functionality\n"
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"similar to passing None).\n"
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"\n"
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"open() returns a file object whose type depends on the mode, and\n"
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"through which the standard file operations such as reading and writing\n"
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"are performed. When open() is used to open a file in a text mode ('w',\n"
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"'r', 'wt', 'rt', etc.), it returns a TextIOWrapper. When used to open\n"
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"a file in a binary mode, the returned class varies: in read binary\n"
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"mode, it returns a BufferedReader; in write binary and append binary\n"
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"modes, it returns a BufferedWriter, and in read/write mode, it returns\n"
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"a BufferedRandom.\n"
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"\n"
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"It is also possible to use a string or bytearray as a file for both\n"
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"reading and writing. For strings StringIO can be used like a file\n"
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"opened in a text mode, and for bytes a BytesIO can be used like a file\n"
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"opened in a binary mode.\n"
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);
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static PyObject *
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io_open(PyObject *self, PyObject *args, PyObject *kwds)
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{
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char *kwlist[] = {"file", "mode", "buffering",
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"encoding", "errors", "newline",
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"closefd", "opener", NULL};
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PyObject *file, *opener = Py_None;
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char *mode = "r";
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int buffering = -1, closefd = 1;
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char *encoding = NULL, *errors = NULL, *newline = NULL;
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unsigned i;
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int creating = 0, reading = 0, writing = 0, appending = 0, updating = 0;
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int text = 0, binary = 0, universal = 0;
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char rawmode[6], *m;
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int line_buffering, isatty;
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PyObject *raw, *modeobj = NULL, *buffer = NULL, *wrapper = NULL;
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_Py_IDENTIFIER(isatty);
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_Py_IDENTIFIER(fileno);
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_Py_IDENTIFIER(mode);
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if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|sizzziO:open", kwlist,
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&file, &mode, &buffering,
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&encoding, &errors, &newline,
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&closefd, &opener)) {
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return NULL;
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}
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if (!PyUnicode_Check(file) &&
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!PyBytes_Check(file) &&
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!PyNumber_Check(file)) {
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PyErr_Format(PyExc_TypeError, "invalid file: %R", file);
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return NULL;
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}
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/* Decode mode */
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for (i = 0; i < strlen(mode); i++) {
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char c = mode[i];
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switch (c) {
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case 'x':
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creating = 1;
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break;
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case 'r':
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reading = 1;
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break;
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case 'w':
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writing = 1;
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break;
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case 'a':
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appending = 1;
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break;
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case '+':
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updating = 1;
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break;
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case 't':
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text = 1;
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break;
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case 'b':
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binary = 1;
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break;
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case 'U':
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universal = 1;
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reading = 1;
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break;
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default:
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goto invalid_mode;
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}
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/* c must not be duplicated */
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if (strchr(mode+i+1, c)) {
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invalid_mode:
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PyErr_Format(PyExc_ValueError, "invalid mode: '%s'", mode);
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return NULL;
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}
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}
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m = rawmode;
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if (creating) *(m++) = 'x';
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if (reading) *(m++) = 'r';
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if (writing) *(m++) = 'w';
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if (appending) *(m++) = 'a';
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if (updating) *(m++) = '+';
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*m = '\0';
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/* Parameters validation */
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if (universal) {
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if (writing || appending) {
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PyErr_SetString(PyExc_ValueError,
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"can't use U and writing mode at once");
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return NULL;
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}
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reading = 1;
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}
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if (text && binary) {
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PyErr_SetString(PyExc_ValueError,
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"can't have text and binary mode at once");
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return NULL;
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}
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if (creating + reading + writing + appending > 1) {
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PyErr_SetString(PyExc_ValueError,
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"must have exactly one of create/read/write/append mode");
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return NULL;
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}
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if (binary && encoding != NULL) {
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PyErr_SetString(PyExc_ValueError,
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"binary mode doesn't take an encoding argument");
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return NULL;
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}
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if (binary && errors != NULL) {
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PyErr_SetString(PyExc_ValueError,
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"binary mode doesn't take an errors argument");
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return NULL;
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}
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if (binary && newline != NULL) {
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PyErr_SetString(PyExc_ValueError,
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"binary mode doesn't take a newline argument");
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return NULL;
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}
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/* Create the Raw file stream */
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raw = PyObject_CallFunction((PyObject *)&PyFileIO_Type,
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"OsiO", file, rawmode, closefd, opener);
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if (raw == NULL)
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return NULL;
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modeobj = PyUnicode_FromString(mode);
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if (modeobj == NULL)
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goto error;
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/* buffering */
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{
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PyObject *res = _PyObject_CallMethodId(raw, &PyId_isatty, NULL);
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if (res == NULL)
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goto error;
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isatty = PyLong_AsLong(res);
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Py_DECREF(res);
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if (isatty == -1 && PyErr_Occurred())
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goto error;
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}
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if (buffering == 1 || (buffering < 0 && isatty)) {
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buffering = -1;
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line_buffering = 1;
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}
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else
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line_buffering = 0;
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if (buffering < 0) {
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buffering = DEFAULT_BUFFER_SIZE;
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#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
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{
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struct stat st;
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long fileno;
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PyObject *res = _PyObject_CallMethodId(raw, &PyId_fileno, NULL);
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if (res == NULL)
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goto error;
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fileno = PyLong_AsLong(res);
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Py_DECREF(res);
|
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if (fileno == -1 && PyErr_Occurred())
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goto error;
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|
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if (fstat(fileno, &st) >= 0 && st.st_blksize > 1)
|
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buffering = st.st_blksize;
|
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}
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#endif
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}
|
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if (buffering < 0) {
|
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PyErr_SetString(PyExc_ValueError,
|
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"invalid buffering size");
|
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goto error;
|
||
}
|
||
|
||
/* if not buffering, returns the raw file object */
|
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if (buffering == 0) {
|
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if (!binary) {
|
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PyErr_SetString(PyExc_ValueError,
|
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"can't have unbuffered text I/O");
|
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goto error;
|
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}
|
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|
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Py_DECREF(modeobj);
|
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return raw;
|
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}
|
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|
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/* wraps into a buffered file */
|
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{
|
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PyObject *Buffered_class;
|
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|
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if (updating)
|
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Buffered_class = (PyObject *)&PyBufferedRandom_Type;
|
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else if (creating || writing || appending)
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Buffered_class = (PyObject *)&PyBufferedWriter_Type;
|
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else if (reading)
|
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Buffered_class = (PyObject *)&PyBufferedReader_Type;
|
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else {
|
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PyErr_Format(PyExc_ValueError,
|
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"unknown mode: '%s'", mode);
|
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goto error;
|
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}
|
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|
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buffer = PyObject_CallFunction(Buffered_class, "Oi", raw, buffering);
|
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}
|
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Py_CLEAR(raw);
|
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if (buffer == NULL)
|
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goto error;
|
||
|
||
|
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/* if binary, returns the buffered file */
|
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if (binary) {
|
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Py_DECREF(modeobj);
|
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return buffer;
|
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}
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|
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/* wraps into a TextIOWrapper */
|
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wrapper = PyObject_CallFunction((PyObject *)&PyTextIOWrapper_Type,
|
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"Osssi",
|
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buffer,
|
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encoding, errors, newline,
|
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line_buffering);
|
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Py_CLEAR(buffer);
|
||
if (wrapper == NULL)
|
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goto error;
|
||
|
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if (_PyObject_SetAttrId(wrapper, &PyId_mode, modeobj) < 0)
|
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goto error;
|
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Py_DECREF(modeobj);
|
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return wrapper;
|
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|
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error:
|
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Py_XDECREF(raw);
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Py_XDECREF(modeobj);
|
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Py_XDECREF(buffer);
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Py_XDECREF(wrapper);
|
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return NULL;
|
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}
|
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|
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/*
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* Private helpers for the io module.
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*/
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||
|
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Py_off_t
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PyNumber_AsOff_t(PyObject *item, PyObject *err)
|
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{
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Py_off_t result;
|
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PyObject *runerr;
|
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PyObject *value = PyNumber_Index(item);
|
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if (value == NULL)
|
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return -1;
|
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|
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/* We're done if PyLong_AsSsize_t() returns without error. */
|
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result = PyLong_AsOff_t(value);
|
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if (result != -1 || !(runerr = PyErr_Occurred()))
|
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goto finish;
|
||
|
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/* 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;
|
||
}
|
||
|
||
|
||
/* Basically the "n" format code with the ability to turn None into -1. */
|
||
int
|
||
_PyIO_ConvertSsize_t(PyObject *obj, void *result) {
|
||
Py_ssize_t limit;
|
||
if (obj == Py_None) {
|
||
limit = -1;
|
||
}
|
||
else if (PyNumber_Check(obj)) {
|
||
limit = PyNumber_AsSsize_t(obj, PyExc_OverflowError);
|
||
if (limit == -1 && PyErr_Occurred())
|
||
return 0;
|
||
}
|
||
else {
|
||
PyErr_Format(PyExc_TypeError,
|
||
"integer argument expected, got '%.200s'",
|
||
Py_TYPE(obj)->tp_name);
|
||
return 0;
|
||
}
|
||
*((Py_ssize_t *)result) = limit;
|
||
return 1;
|
||
}
|
||
|
||
|
||
static int
|
||
iomodule_traverse(PyObject *mod, visitproc visit, void *arg) {
|
||
_PyIO_State *state = IO_MOD_STATE(mod);
|
||
if (!state->initialized)
|
||
return 0;
|
||
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;
|
||
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;
|
||
|
||
#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, for compatibility */
|
||
Py_INCREF(PyExc_BlockingIOError);
|
||
if (PyModule_AddObject(m, "BlockingIOError",
|
||
(PyObject *) PyExc_BlockingIOError) < 0)
|
||
goto fail;
|
||
|
||
/* 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");
|
||
if (PyType_Ready(&_PyBytesIOBuffer_Type) < 0)
|
||
goto fail;
|
||
|
||
/* 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 */
|
||
#define ADD_INTERNED(name) \
|
||
if (!_PyIO_str_ ## name && \
|
||
!(_PyIO_str_ ## name = PyUnicode_InternFromString(# name))) \
|
||
goto fail;
|
||
|
||
ADD_INTERNED(close)
|
||
ADD_INTERNED(closed)
|
||
ADD_INTERNED(decode)
|
||
ADD_INTERNED(encode)
|
||
ADD_INTERNED(fileno)
|
||
ADD_INTERNED(flush)
|
||
ADD_INTERNED(getstate)
|
||
ADD_INTERNED(isatty)
|
||
ADD_INTERNED(newlines)
|
||
ADD_INTERNED(read)
|
||
ADD_INTERNED(read1)
|
||
ADD_INTERNED(readable)
|
||
ADD_INTERNED(readall)
|
||
ADD_INTERNED(readinto)
|
||
ADD_INTERNED(readline)
|
||
ADD_INTERNED(reset)
|
||
ADD_INTERNED(seek)
|
||
ADD_INTERNED(seekable)
|
||
ADD_INTERNED(setstate)
|
||
ADD_INTERNED(tell)
|
||
ADD_INTERNED(truncate)
|
||
ADD_INTERNED(write)
|
||
ADD_INTERNED(writable)
|
||
|
||
if (!_PyIO_str_nl &&
|
||
!(_PyIO_str_nl = PyUnicode_InternFromString("\n")))
|
||
goto fail;
|
||
|
||
if (!_PyIO_empty_str &&
|
||
!(_PyIO_empty_str = PyUnicode_FromStringAndSize(NULL, 0)))
|
||
goto fail;
|
||
if (!_PyIO_empty_bytes &&
|
||
!(_PyIO_empty_bytes = PyBytes_FromStringAndSize(NULL, 0)))
|
||
goto fail;
|
||
if (!_PyIO_zero &&
|
||
!(_PyIO_zero = PyLong_FromLong(0L)))
|
||
goto fail;
|
||
|
||
state->initialized = 1;
|
||
|
||
return m;
|
||
|
||
fail:
|
||
Py_XDECREF(state->unsupported_operation);
|
||
Py_DECREF(m);
|
||
return NULL;
|
||
}
|