FCL/interim/QEMU: comparison symbian-qemu-0.9.1-12/python-2.6.1/Objects/fileobject.c

equal deleted inserted replaced

-:ffa851df0825
+:2fb8b9db1c86
+/* File object implementation */
+#define PY_SSIZE_T_CLEAN
+#include "Python.h"
+#include "structmember.h"
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif /* HAVE_SYS_TYPES_H */
+#ifdef MS_WINDOWS
+#define fileno _fileno
+/* can simulate truncate with Win32 API functions; see file_truncate */
+#define HAVE_FTRUNCATE
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#endif
+#ifdef _MSC_VER
+/* Need GetVersion to see if on NT so safe to use _wfopen */
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#endif /* _MSC_VER */
+#if defined(PYOS_OS2) && defined(PYCC_GCC)
+#include <io.h>
+#endif
+#define BUF(v) PyString_AS_STRING((PyStringObject *)v)
+#ifndef DONT_HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#ifdef HAVE_GETC_UNLOCKED
+#define GETC(f) getc_unlocked(f)
+#define FLOCKFILE(f) flockfile(f)
+#define FUNLOCKFILE(f) funlockfile(f)
+#else
+#define GETC(f) getc(f)
+#define FLOCKFILE(f)
+#define FUNLOCKFILE(f)
+#endif
+/* Bits in f_newlinetypes */
+#define NEWLINE_UNKNOWN	0	/* No newline seen, yet */
+#define NEWLINE_CR 1		/* \r newline seen */
+#define NEWLINE_LF 2		/* \n newline seen */
+#define NEWLINE_CRLF 4		/* \r\n newline seen */
+/*
+* These macros release the GIL while preventing the f_close() function being
+* called in the interval between them.  For that purpose, a running total of
+* the number of currently running unlocked code sections is kept in
+* the unlocked_count field of the PyFileObject. The close() method raises
+* an IOError if that field is non-zero.  See issue #815646, #595601.
+*/
+#define FILE_BEGIN_ALLOW_THREADS(fobj) \
+{ \
+	fobj->unlocked_count++; \
+	Py_BEGIN_ALLOW_THREADS
+#define FILE_END_ALLOW_THREADS(fobj) \
+	Py_END_ALLOW_THREADS \
+	fobj->unlocked_count--; \
+	assert(fobj->unlocked_count >= 0); \
+}
+#define FILE_ABORT_ALLOW_THREADS(fobj) \
+	Py_BLOCK_THREADS \
+	fobj->unlocked_count--; \
+	assert(fobj->unlocked_count >= 0);
+#ifdef __cplusplus
+extern "C" {
+#endif
+FILE *
+PyFile_AsFile(PyObject *f)
+{
+	if (f == NULL || !PyFile_Check(f))
+		return NULL;
+	else
+		return ((PyFileObject *)f)->f_fp;
+}
+void PyFile_IncUseCount(PyFileObject *fobj)
+{
+	fobj->unlocked_count++;
+}
+void PyFile_DecUseCount(PyFileObject *fobj)
+{
+	fobj->unlocked_count--;
+	assert(fobj->unlocked_count >= 0);
+}
+PyObject *
+PyFile_Name(PyObject *f)
+{
+	if (f == NULL || !PyFile_Check(f))
+		return NULL;
+	else
+		return ((PyFileObject *)f)->f_name;
+}
+/* This is a safe wrapper around PyObject_Print to print to the FILE
+of a PyFileObject. PyObject_Print releases the GIL but knows nothing
+about PyFileObject. */
+static int
+file_PyObject_Print(PyObject *op, PyFileObject *f, int flags)
+{
+	int result;
+	PyFile_IncUseCount(f);
+	result = PyObject_Print(op, f->f_fp, flags);
+	PyFile_DecUseCount(f);
+	return result;
+}
+/* On Unix, fopen will succeed for directories.
+In Python, there should be no file objects referring to
+directories, so we need a check.  */
+static PyFileObject*
+dircheck(PyFileObject* f)
+{
+#if defined(HAVE_FSTAT) && defined(S_IFDIR) && defined(EISDIR)
+	struct stat buf;
+	if (f->f_fp == NULL)
+		return f;
+	if (fstat(fileno(f->f_fp), &buf) == 0 &&
+	    S_ISDIR(buf.st_mode)) {
+		char *msg = strerror(EISDIR);
+		PyObject *exc = PyObject_CallFunction(PyExc_IOError, "(is)",
+						      EISDIR, msg);
+		PyErr_SetObject(PyExc_IOError, exc);
+		Py_XDECREF(exc);
+		return NULL;
+	}
+#endif
+	return f;
+}
+static PyObject *
+fill_file_fields(PyFileObject *f, FILE *fp, PyObject *name, char *mode,
+		 int (*close)(FILE *))
+{
+	assert(name != NULL);
+	assert(f != NULL);
+	assert(PyFile_Check(f));
+	assert(f->f_fp == NULL);
+	Py_DECREF(f->f_name);
+	Py_DECREF(f->f_mode);
+	Py_DECREF(f->f_encoding);
+	Py_DECREF(f->f_errors);
+Py_INCREF(name);
+f->f_name = name;
+	f->f_mode = PyString_FromString(mode);
+	f->f_close = close;
+	f->f_softspace = 0;
+	f->f_binary = strchr(mode,'b') != NULL;
+	f->f_buf = NULL;
+	f->f_univ_newline = (strchr(mode, 'U') != NULL);
+	f->f_newlinetypes = NEWLINE_UNKNOWN;
+	f->f_skipnextlf = 0;
+	Py_INCREF(Py_None);
+	f->f_encoding = Py_None;
+	Py_INCREF(Py_None);
+	f->f_errors = Py_None;
+	if (f->f_mode == NULL)
+		return NULL;
+	f->f_fp = fp;
+f = dircheck(f);
+	return (PyObject *) f;
+}
+/* check for known incorrect mode strings - problem is, platforms are
+free to accept any mode characters they like and are supposed to
+ignore stuff they don't understand... write or append mode with
+universal newline support is expressly forbidden by PEP 278.
+Additionally, remove the 'U' from the mode string as platforms
+won't know what it is. Non-zero return signals an exception */
+int
+_PyFile_SanitizeMode(char *mode)
+{
+	char *upos;
+	size_t len = strlen(mode);
+	if (!len) {
+		PyErr_SetString(PyExc_ValueError, "empty mode string");
+		return -1;
+	}
+	upos = strchr(mode, 'U');
+	if (upos) {
+		memmove(upos, upos+1, len-(upos-mode)); /* incl null char */
+		if (mode[0] == 'w' || mode[0] == 'a') {
+			PyErr_Format(PyExc_ValueError, "universal newline "
+			             "mode can only be used with modes "
+				     "starting with 'r'");
+			return -1;
+		}
+		if (mode[0] != 'r') {
+			memmove(mode+1, mode, strlen(mode)+1);
+			mode[0] = 'r';
+		}
+		if (!strchr(mode, 'b')) {
+			memmove(mode+2, mode+1, strlen(mode));
+			mode[1] = 'b';
+		}
+	} else if (mode[0] != 'r' && mode[0] != 'w' && mode[0] != 'a') {
+		PyErr_Format(PyExc_ValueError, "mode string must begin with "
+	        	    "one of 'r', 'w', 'a' or 'U', not '%.200s'", mode);
+		return -1;
+	}
+	return 0;
+}
+static PyObject *
+open_the_file(PyFileObject *f, char *name, char *mode)
+{
+	char *newmode;
+	assert(f != NULL);
+	assert(PyFile_Check(f));
+#ifdef MS_WINDOWS
+	/* windows ignores the passed name in order to support Unicode */
+	assert(f->f_name != NULL);
+#else
+	assert(name != NULL);
+#endif
+	assert(mode != NULL);
+	assert(f->f_fp == NULL);
+	/* probably need to replace 'U' by 'rb' */
+	newmode = PyMem_MALLOC(strlen(mode) + 3);
+	if (!newmode) {
+		PyErr_NoMemory();
+		return NULL;
+	}
+	strcpy(newmode, mode);
+	if (_PyFile_SanitizeMode(newmode)) {
+		f = NULL;
+		goto cleanup;
+	}
+	/* rexec.py can't stop a user from getting the file() constructor --
+	   all they have to do is get *any* file object f, and then do
+	   type(f).  Here we prevent them from doing damage with it. */
+	if (PyEval_GetRestricted()) {
+		PyErr_SetString(PyExc_IOError,
+		"file() constructor not accessible in restricted mode");
+		f = NULL;
+		goto cleanup;
+	}
+	errno = 0;
+#ifdef MS_WINDOWS
+	if (PyUnicode_Check(f->f_name)) {
+		PyObject *wmode;
+		wmode = PyUnicode_DecodeASCII(newmode, strlen(newmode), NULL);
+		if (f->f_name && wmode) {
+			FILE_BEGIN_ALLOW_THREADS(f)
+			/* PyUnicode_AS_UNICODE OK without thread
+			   lock as it is a simple dereference. */
+			f->f_fp = _wfopen(PyUnicode_AS_UNICODE(f->f_name),
+					  PyUnicode_AS_UNICODE(wmode));
+			FILE_END_ALLOW_THREADS(f)
+		}
+		Py_XDECREF(wmode);
+	}
+#endif
+	if (NULL == f->f_fp && NULL != name) {
+		FILE_BEGIN_ALLOW_THREADS(f)
+		f->f_fp = fopen(name, newmode);
+		FILE_END_ALLOW_THREADS(f)
+	}
+	if (f->f_fp == NULL) {
+#if defined  _MSC_VER && (_MSC_VER < 1400 || !defined(__STDC_SECURE_LIB__))
+		/* MSVC 6 (Microsoft) leaves errno at 0 for bad mode strings,
+		 * across all Windows flavors.  When it sets EINVAL varies
+		 * across Windows flavors, the exact conditions aren't
+		 * documented, and the answer lies in the OS's implementation
+		 * of Win32's CreateFile function (whose source is secret).
+		 * Seems the best we can do is map EINVAL to ENOENT.
+		 * Starting with Visual Studio .NET 2005, EINVAL is correctly
+		 * set by our CRT error handler (set in exceptions.c.)
+		 */
+		if (errno == 0)	/* bad mode string */
+			errno = EINVAL;
+		else if (errno == EINVAL) /* unknown, but not a mode string */
+			errno = ENOENT;
+#endif
+/* EINVAL is returned when an invalid filename or
+* an invalid mode is supplied. */
+		if (errno == EINVAL) {
+			PyObject *v;
+			char message[100];
+			PyOS_snprintf(message, 100,
+			    "invalid mode ('%.50s') or filename", mode);
+			v = Py_BuildValue("(isO)", errno, message, f->f_name);
+			if (v != NULL) {
+				PyErr_SetObject(PyExc_IOError, v);
+				Py_DECREF(v);
+			}
+		}
+		else
+			PyErr_SetFromErrnoWithFilenameObject(PyExc_IOError, f->f_name);
+		f = NULL;
+	}
+	if (f != NULL)
+		f = dircheck(f);
+cleanup:
+	PyMem_FREE(newmode);
+	return (PyObject *)f;
+}
+static PyObject *
+close_the_file(PyFileObject *f)
+{
+	int sts = 0;
+	int (*local_close)(FILE *);
+	FILE *local_fp = f->f_fp;
+	if (local_fp != NULL) {
+		local_close = f->f_close;
+		if (local_close != NULL && f->unlocked_count > 0) {
+			if (f->ob_refcnt > 0) {
+				PyErr_SetString(PyExc_IOError,
+					"close() called during concurrent "
+					"operation on the same file object.");
+			} else {
+				/* This should not happen unless someone is
+				 * carelessly playing with the PyFileObject
+				 * struct fields and/or its associated FILE
+				 * pointer. */
+				PyErr_SetString(PyExc_SystemError,
+					"PyFileObject locking error in "
+					"destructor (refcnt <= 0 at close).");
+			}
+			return NULL;
+		}
+		/* NULL out the FILE pointer before releasing the GIL, because
+		 * it will not be valid anymore after the close() function is
+		 * called. */
+		f->f_fp = NULL;
+		if (local_close != NULL) {
+			Py_BEGIN_ALLOW_THREADS
+			errno = 0;
+			sts = (*local_close)(local_fp);
+			Py_END_ALLOW_THREADS
+			if (sts == EOF)
+				return PyErr_SetFromErrno(PyExc_IOError);
+			if (sts != 0)
+				return PyInt_FromLong((long)sts);
+		}
+	}
+	Py_RETURN_NONE;
+}
+PyObject *
+PyFile_FromFile(FILE *fp, char *name, char *mode, int (*close)(FILE *))
+{
+	PyFileObject *f = (PyFileObject *)PyFile_Type.tp_new(&PyFile_Type,
+							     NULL, NULL);
+	if (f != NULL) {
+		PyObject *o_name = PyString_FromString(name);
+		if (o_name == NULL)
+			return NULL;
+		if (fill_file_fields(f, fp, o_name, mode, close) == NULL) {
+			Py_DECREF(f);
+			f = NULL;
+		}
+Py_DECREF(o_name);
+	}
+	return (PyObject *) f;
+}
+PyObject *
+PyFile_FromString(char *name, char *mode)
+{
+	extern int fclose(FILE *);
+	PyFileObject *f;
+	f = (PyFileObject *)PyFile_FromFile((FILE *)NULL, name, mode, fclose);
+	if (f != NULL) {
+		if (open_the_file(f, name, mode) == NULL) {
+			Py_DECREF(f);
+			f = NULL;
+		}
+	}
+	return (PyObject *)f;
+}
+void
+PyFile_SetBufSize(PyObject *f, int bufsize)
+{
+	PyFileObject *file = (PyFileObject *)f;
+	if (bufsize >= 0) {
+		int type;
+		switch (bufsize) {
+		case 0:
+			type = _IONBF;
+			break;
+#ifdef HAVE_SETVBUF
+		case 1:
+			type = _IOLBF;
+			bufsize = BUFSIZ;
+			break;
+#endif
+		default:
+			type = _IOFBF;
+#ifndef HAVE_SETVBUF
+			bufsize = BUFSIZ;
+#endif
+			break;
+		}
+		fflush(file->f_fp);
+		if (type == _IONBF) {
+			PyMem_Free(file->f_setbuf);
+			file->f_setbuf = NULL;
+		} else {
+			file->f_setbuf = (char *)PyMem_Realloc(file->f_setbuf,
+bufsize);
+		}
+#ifdef HAVE_SETVBUF
+		setvbuf(file->f_fp, file->f_setbuf, type, bufsize);
+#else /* !HAVE_SETVBUF */
+		setbuf(file->f_fp, file->f_setbuf);
+#endif /* !HAVE_SETVBUF */
+	}
+}
+/* Set the encoding used to output Unicode strings.
+Return 1 on success, 0 on failure. */
+int
+PyFile_SetEncoding(PyObject *f, const char *enc)
+{
+	return PyFile_SetEncodingAndErrors(f, enc, NULL);
+}
+int
+PyFile_SetEncodingAndErrors(PyObject *f, const char *enc, char* errors)
+{
+	PyFileObject *file = (PyFileObject*)f;
+	PyObject *str, *oerrors;
+	assert(PyFile_Check(f));
+	str = PyString_FromString(enc);
+	if (!str)
+		return 0;
+	if (errors) {
+		oerrors = PyString_FromString(errors);
+		if (!oerrors) {
+			Py_DECREF(str);
+			return 0;
+		}
+	} else {
+		oerrors = Py_None;
+		Py_INCREF(Py_None);
+	}
+	Py_DECREF(file->f_encoding);
+	file->f_encoding = str;
+	Py_DECREF(file->f_errors);
+	file->f_errors = oerrors;
+	return 1;
+}
+static PyObject *
+err_closed(void)
+{
+	PyErr_SetString(PyExc_ValueError, "I/O operation on closed file");
+	return NULL;
+}
+/* Refuse regular file I/O if there's data in the iteration-buffer.
+* Mixing them would cause data to arrive out of order, as the read*
+* methods don't use the iteration buffer. */
+static PyObject *
+err_iterbuffered(void)
+{
+	PyErr_SetString(PyExc_ValueError,
+		"Mixing iteration and read methods would lose data");
+	return NULL;
+}
+static void drop_readahead(PyFileObject *);
+/* Methods */
+static void
+file_dealloc(PyFileObject *f)
+{
+	PyObject *ret;
+	if (f->weakreflist != NULL)
+		PyObject_ClearWeakRefs((PyObject *) f);
+	ret = close_the_file(f);
+	if (!ret) {
+		PySys_WriteStderr("close failed in file object destructor:\n");
+		PyErr_Print();
+	}
+	else {
+		Py_DECREF(ret);
+	}
+	PyMem_Free(f->f_setbuf);
+	Py_XDECREF(f->f_name);
+	Py_XDECREF(f->f_mode);
+	Py_XDECREF(f->f_encoding);
+	Py_XDECREF(f->f_errors);
+	drop_readahead(f);
+	Py_TYPE(f)->tp_free((PyObject *)f);
+}
+static PyObject *
+file_repr(PyFileObject *f)
+{
+	if (PyUnicode_Check(f->f_name)) {
+#ifdef Py_USING_UNICODE
+		PyObject *ret = NULL;
+		PyObject *name = PyUnicode_AsUnicodeEscapeString(f->f_name);
+		const char *name_str = name ? PyString_AsString(name) : "?";
+		ret = PyString_FromFormat("<%s file u'%s', mode '%s' at %p>",
+				   f->f_fp == NULL ? "closed" : "open",
+				   name_str,
+				   PyString_AsString(f->f_mode),
+				   f);
+		Py_XDECREF(name);
+		return ret;
+#endif
+	} else {
+		return PyString_FromFormat("<%s file '%s', mode '%s' at %p>",
+				   f->f_fp == NULL ? "closed" : "open",
+				   PyString_AsString(f->f_name),
+				   PyString_AsString(f->f_mode),
+				   f);
+	}
+}
+static PyObject *
+file_close(PyFileObject *f)
+{
+	PyObject *sts = close_the_file(f);
+	PyMem_Free(f->f_setbuf);
+	f->f_setbuf = NULL;
+	return sts;
+}
+/* Our very own off_t-like type, 64-bit if possible */
+#if !defined(HAVE_LARGEFILE_SUPPORT)
+typedef off_t Py_off_t;
+#elif SIZEOF_OFF_T >= 8
+typedef off_t Py_off_t;
+#elif SIZEOF_FPOS_T >= 8
+typedef fpos_t Py_off_t;
+#else
+#error "Large file support, but neither off_t nor fpos_t is large enough."
+#endif
+/* a portable fseek() function
+return 0 on success, non-zero on failure (with errno set) */
+static int
+_portable_fseek(FILE *fp, Py_off_t offset, int whence)
+{
+#if !defined(HAVE_LARGEFILE_SUPPORT)
+	return fseek(fp, offset, whence);
+#elif defined(HAVE_FSEEKO) && SIZEOF_OFF_T >= 8
+	return fseeko(fp, offset, whence);
+#elif defined(HAVE_FSEEK64)
+	return fseek64(fp, offset, whence);
+#elif defined(__BEOS__)
+	return _fseek(fp, offset, whence);
+#elif SIZEOF_FPOS_T >= 8
+	/* lacking a 64-bit capable fseek(), use a 64-bit capable fsetpos()
+	   and fgetpos() to implement fseek()*/
+	fpos_t pos;
+	switch (whence) {
+	case SEEK_END:
+#ifdef MS_WINDOWS
+		fflush(fp);
+		if (_lseeki64(fileno(fp), 0, 2) == -1)
+			return -1;
+#else
+		if (fseek(fp, 0, SEEK_END) != 0)
+			return -1;
+#endif
+		/* fall through */
+	case SEEK_CUR:
+		if (fgetpos(fp, &pos) != 0)
+			return -1;
+		offset += pos;
+		break;
+	/* case SEEK_SET: break; */
+	}
+	return fsetpos(fp, &offset);
+#else
+#error "Large file support, but no way to fseek."
+#endif
+}
+/* a portable ftell() function
+Return -1 on failure with errno set appropriately, current file
+position on success */
+static Py_off_t
+_portable_ftell(FILE* fp)
+{
+#if !defined(HAVE_LARGEFILE_SUPPORT)
+	return ftell(fp);
+#elif defined(HAVE_FTELLO) && SIZEOF_OFF_T >= 8
+	return ftello(fp);
+#elif defined(HAVE_FTELL64)
+	return ftell64(fp);
+#elif SIZEOF_FPOS_T >= 8
+	fpos_t pos;
+	if (fgetpos(fp, &pos) != 0)
+		return -1;
+	return pos;
+#else
+#error "Large file support, but no way to ftell."
+#endif
+}
+static PyObject *
+file_seek(PyFileObject *f, PyObject *args)
+{
+	int whence;
+	int ret;
+	Py_off_t offset;
+	PyObject *offobj, *off_index;
+	if (f->f_fp == NULL)
+		return err_closed();
+	drop_readahead(f);
+	whence = 0;
+	if (!PyArg_ParseTuple(args, "O|i:seek", &offobj, &whence))
+		return NULL;
+	off_index = PyNumber_Index(offobj);
+	if (!off_index) {
+		if (!PyFloat_Check(offobj))
+			return NULL;
+		/* Deprecated in 2.6 */
+		PyErr_Clear();
+		if (PyErr_WarnEx(PyExc_DeprecationWarning,
+				 "integer argument expected, got float",
+				 1) < 0)
+			return NULL;
+		off_index = offobj;
+		Py_INCREF(offobj);
+	}
+#if !defined(HAVE_LARGEFILE_SUPPORT)
+	offset = PyInt_AsLong(off_index);
+#else
+	offset = PyLong_Check(off_index) ?
+		PyLong_AsLongLong(off_index) : PyInt_AsLong(off_index);
+#endif
+	Py_DECREF(off_index);
+	if (PyErr_Occurred())
+		return NULL;
+	FILE_BEGIN_ALLOW_THREADS(f)
+	errno = 0;
+	ret = _portable_fseek(f->f_fp, offset, whence);
+	FILE_END_ALLOW_THREADS(f)
+	if (ret != 0) {
+		PyErr_SetFromErrno(PyExc_IOError);
+		clearerr(f->f_fp);
+		return NULL;
+	}
+	f->f_skipnextlf = 0;
+	Py_INCREF(Py_None);
+	return Py_None;
+}
+#ifdef HAVE_FTRUNCATE
+static PyObject *
+file_truncate(PyFileObject *f, PyObject *args)
+{
+	Py_off_t newsize;
+	PyObject *newsizeobj = NULL;
+	Py_off_t initialpos;
+	int ret;
+	if (f->f_fp == NULL)
+		return err_closed();
+	if (!PyArg_UnpackTuple(args, "truncate", 0, 1, &newsizeobj))
+		return NULL;
+	/* Get current file position.  If the file happens to be open for
+	 * update and the last operation was an input operation, C doesn't
+	 * define what the later fflush() will do, but we promise truncate()
+	 * won't change the current position (and fflush() *does* change it
+	 * then at least on Windows).  The easiest thing is to capture
+	 * current pos now and seek back to it at the end.
+	 */
+	FILE_BEGIN_ALLOW_THREADS(f)
+	errno = 0;
+	initialpos = _portable_ftell(f->f_fp);
+	FILE_END_ALLOW_THREADS(f)
+	if (initialpos == -1)
+		goto onioerror;
+	/* Set newsize to current postion if newsizeobj NULL, else to the
+	 * specified value.
+	 */
+	if (newsizeobj != NULL) {
+#if !defined(HAVE_LARGEFILE_SUPPORT)
+		newsize = PyInt_AsLong(newsizeobj);
+#else
+		newsize = PyLong_Check(newsizeobj) ?
+				PyLong_AsLongLong(newsizeobj) :
+				PyInt_AsLong(newsizeobj);
+#endif
+		if (PyErr_Occurred())
+			return NULL;
+	}
+	else /* default to current position */
+		newsize = initialpos;
+	/* Flush the stream.  We're mixing stream-level I/O with lower-level
+	 * I/O, and a flush may be necessary to synch both platform views
+	 * of the current file state.
+	 */
+	FILE_BEGIN_ALLOW_THREADS(f)
+	errno = 0;
+	ret = fflush(f->f_fp);
+	FILE_END_ALLOW_THREADS(f)
+	if (ret != 0)
+		goto onioerror;
+#ifdef MS_WINDOWS
+	/* MS _chsize doesn't work if newsize doesn't fit in 32 bits,
+	   so don't even try using it. */
+	{
+		HANDLE hFile;
+		/* Have to move current pos to desired endpoint on Windows. */
+		FILE_BEGIN_ALLOW_THREADS(f)
+		errno = 0;
+		ret = _portable_fseek(f->f_fp, newsize, SEEK_SET) != 0;
+		FILE_END_ALLOW_THREADS(f)
+		if (ret)
+			goto onioerror;
+		/* Truncate.  Note that this may grow the file! */
+		FILE_BEGIN_ALLOW_THREADS(f)
+		errno = 0;
+		hFile = (HANDLE)_get_osfhandle(fileno(f->f_fp));
+		ret = hFile == (HANDLE)-1;
+		if (ret == 0) {
+			ret = SetEndOfFile(hFile) == 0;
+			if (ret)
+				errno = EACCES;
+		}
+		FILE_END_ALLOW_THREADS(f)
+		if (ret)
+			goto onioerror;
+	}
+#else
+	FILE_BEGIN_ALLOW_THREADS(f)
+	errno = 0;
+	ret = ftruncate(fileno(f->f_fp), newsize);
+	FILE_END_ALLOW_THREADS(f)
+	if (ret != 0)
+		goto onioerror;
+#endif /* !MS_WINDOWS */
+	/* Restore original file position. */
+	FILE_BEGIN_ALLOW_THREADS(f)
+	errno = 0;
+	ret = _portable_fseek(f->f_fp, initialpos, SEEK_SET) != 0;
+	FILE_END_ALLOW_THREADS(f)
+	if (ret)
+		goto onioerror;
+	Py_INCREF(Py_None);
+	return Py_None;
+onioerror:
+	PyErr_SetFromErrno(PyExc_IOError);
+	clearerr(f->f_fp);
+	return NULL;
+}
+#endif /* HAVE_FTRUNCATE */
+static PyObject *
+file_tell(PyFileObject *f)
+{
+	Py_off_t pos;
+	if (f->f_fp == NULL)
+		return err_closed();
+	FILE_BEGIN_ALLOW_THREADS(f)
+	errno = 0;
+	pos = _portable_ftell(f->f_fp);
+	FILE_END_ALLOW_THREADS(f)
+	if (pos == -1) {
+		PyErr_SetFromErrno(PyExc_IOError);
+		clearerr(f->f_fp);
+		return NULL;
+	}
+	if (f->f_skipnextlf) {
+		int c;
+		c = GETC(f->f_fp);
+		if (c == '\n') {
+			f->f_newlinetypes |= NEWLINE_CRLF;
+			pos++;
+			f->f_skipnextlf = 0;
+		} else if (c != EOF) ungetc(c, f->f_fp);
+	}
+#if !defined(HAVE_LARGEFILE_SUPPORT)
+	return PyInt_FromLong(pos);
+#else
+	return PyLong_FromLongLong(pos);
+#endif
+}
+static PyObject *
+file_fileno(PyFileObject *f)
+{
+	if (f->f_fp == NULL)
+		return err_closed();
+	return PyInt_FromLong((long) fileno(f->f_fp));
+}
+static PyObject *
+file_flush(PyFileObject *f)
+{
+	int res;
+	if (f->f_fp == NULL)
+		return err_closed();
+	FILE_BEGIN_ALLOW_THREADS(f)
+	errno = 0;
+	res = fflush(f->f_fp);
+	FILE_END_ALLOW_THREADS(f)
+	if (res != 0) {
+		PyErr_SetFromErrno(PyExc_IOError);
+		clearerr(f->f_fp);
+		return NULL;
+	}
+	Py_INCREF(Py_None);
+	return Py_None;
+}
+static PyObject *
+file_isatty(PyFileObject *f)
+{
+	long res;
+	if (f->f_fp == NULL)
+		return err_closed();
+	FILE_BEGIN_ALLOW_THREADS(f)
+	res = isatty((int)fileno(f->f_fp));
+	FILE_END_ALLOW_THREADS(f)
+	return PyBool_FromLong(res);
+}
+#if BUFSIZ < 8192
+#define SMALLCHUNK 8192
+#else
+#define SMALLCHUNK BUFSIZ
+#endif
+#if SIZEOF_INT < 4
+#define BIGCHUNK  (512 * 32)
+#else
+#define BIGCHUNK  (512 * 1024)
+#endif
+static size_t
+new_buffersize(PyFileObject *f, size_t currentsize)
+{
+#ifdef HAVE_FSTAT
+	off_t pos, end;
+	struct stat st;
+	if (fstat(fileno(f->f_fp), &st) == 0) {
+		end = st.st_size;
+		/* The following is not a bug: we really need to call lseek()
+		   *and* ftell().  The reason is that some stdio libraries
+		   mistakenly flush their buffer when ftell() is called and
+		   the lseek() call it makes fails, thereby throwing away
+		   data that cannot be recovered in any way.  To avoid this,
+		   we first test lseek(), and only call ftell() if lseek()
+		   works.  We can't use the lseek() value either, because we
+		   need to take the amount of buffered data into account.
+		   (Yet another reason why stdio stinks. :-) */
+		pos = lseek(fileno(f->f_fp), 0L, SEEK_CUR);
+		if (pos >= 0) {
+			pos = ftell(f->f_fp);
+		}
+		if (pos < 0)
+			clearerr(f->f_fp);
+		if (end > pos && pos >= 0)
+			return currentsize + end - pos + 1;
+		/* Add 1 so if the file were to grow we'd notice. */
+	}
+#endif
+	if (currentsize > SMALLCHUNK) {
+		/* Keep doubling until we reach BIGCHUNK;
+		   then keep adding BIGCHUNK. */
+		if (currentsize <= BIGCHUNK)
+			return currentsize + currentsize;
+		else
+			return currentsize + BIGCHUNK;
+	}
+	return currentsize + SMALLCHUNK;
+}
+#if defined(EWOULDBLOCK) && defined(EAGAIN) && EWOULDBLOCK != EAGAIN
+#define BLOCKED_ERRNO(x) ((x) == EWOULDBLOCK || (x) == EAGAIN)
+#else
+#ifdef EWOULDBLOCK
+#define BLOCKED_ERRNO(x) ((x) == EWOULDBLOCK)
+#else
+#ifdef EAGAIN
+#define BLOCKED_ERRNO(x) ((x) == EAGAIN)
+#else
+#define BLOCKED_ERRNO(x) 0
+#endif
+#endif
+#endif
+static PyObject *
+file_read(PyFileObject *f, PyObject *args)
+{
+	long bytesrequested = -1;
+	size_t bytesread, buffersize, chunksize;
+	PyObject *v;
+	if (f->f_fp == NULL)
+		return err_closed();
+	/* refuse to mix with f.next() */
+	if (f->f_buf != NULL &&
+	    (f->f_bufend - f->f_bufptr) > 0 &&
+	    f->f_buf[0] != '\0')
+		return err_iterbuffered();
+	if (!PyArg_ParseTuple(args, "|l:read", &bytesrequested))
+		return NULL;
+	if (bytesrequested < 0)
+		buffersize = new_buffersize(f, (size_t)0);
+	else
+		buffersize = bytesrequested;
+	if (buffersize > PY_SSIZE_T_MAX) {
+		PyErr_SetString(PyExc_OverflowError,
+	"requested number of bytes is more than a Python string can hold");
+		return NULL;
+	}
+	v = PyString_FromStringAndSize((char *)NULL, buffersize);
+	if (v == NULL)
+		return NULL;
+	bytesread = 0;
+	for (;;) {
+		FILE_BEGIN_ALLOW_THREADS(f)
+		errno = 0;
+		chunksize = Py_UniversalNewlineFread(BUF(v) + bytesread,
+			  buffersize - bytesread, f->f_fp, (PyObject *)f);
+		FILE_END_ALLOW_THREADS(f)
+		if (chunksize == 0) {
+			if (!ferror(f->f_fp))
+				break;
+			clearerr(f->f_fp);
+			/* When in non-blocking mode, data shouldn't
+			 * be discarded if a blocking signal was
+			 * received. That will also happen if
+			 * chunksize != 0, but bytesread < buffersize. */
+			if (bytesread > 0 && BLOCKED_ERRNO(errno))
+				break;
+			PyErr_SetFromErrno(PyExc_IOError);
+			Py_DECREF(v);
+			return NULL;
+		}
+		bytesread += chunksize;
+		if (bytesread < buffersize) {
+			clearerr(f->f_fp);
+			break;
+		}
+		if (bytesrequested < 0) {
+			buffersize = new_buffersize(f, buffersize);
+			if (_PyString_Resize(&v, buffersize) < 0)
+				return NULL;
+		} else {
+			/* Got what was requested. */
+			break;
+		}
+	}
+	if (bytesread != buffersize)
+		_PyString_Resize(&v, bytesread);
+	return v;
+}
+static PyObject *
+file_readinto(PyFileObject *f, PyObject *args)
+{
+	char *ptr;
+	Py_ssize_t ntodo;
+	Py_ssize_t ndone, nnow;
+	Py_buffer pbuf;
+	if (f->f_fp == NULL)
+		return err_closed();
+	/* refuse to mix with f.next() */
+	if (f->f_buf != NULL &&
+	    (f->f_bufend - f->f_bufptr) > 0 &&
+	    f->f_buf[0] != '\0')
+		return err_iterbuffered();
+	if (!PyArg_ParseTuple(args, "w*", &pbuf))
+		return NULL;
+	ptr = pbuf.buf;
+	ntodo = pbuf.len;
+	ndone = 0;
+	while (ntodo > 0) {
+		FILE_BEGIN_ALLOW_THREADS(f)
+		errno = 0;
+		nnow = Py_UniversalNewlineFread(ptr+ndone, ntodo, f->f_fp,
+						(PyObject *)f);
+		FILE_END_ALLOW_THREADS(f)
+		if (nnow == 0) {
+			if (!ferror(f->f_fp))
+				break;
+			PyErr_SetFromErrno(PyExc_IOError);
+			clearerr(f->f_fp);
+			PyBuffer_Release(&pbuf);
+			return NULL;
+		}
+		ndone += nnow;
+		ntodo -= nnow;
+	}
+	PyBuffer_Release(&pbuf);
+	return PyInt_FromSsize_t(ndone);
+}
+/**************************************************************************
+Routine to get next line using platform fgets().
+Under MSVC 6:
++ MS threadsafe getc is very slow (multiple layers of function calls before+
+after each character, to lock+unlock the stream).
++ The stream-locking functions are MS-internal -- can't access them from user
+code.
++ There's nothing Tim could find in the MS C or platform SDK libraries that
+can worm around this.
++ MS fgets locks/unlocks only once per line; it's the only hook we have.
+So we use fgets for speed(!), despite that it's painful.
+MS realloc is also slow.
+Reports from other platforms on this method vs getc_unlocked (which MS doesn't
+have):
+	Linux		a wash
+	Solaris		a wash
+	Tru64 Unix	getline_via_fgets significantly faster
+CAUTION:  The C std isn't clear about this:  in those cases where fgets
+writes something into the buffer, can it write into any position beyond the
+required trailing null byte?  MSVC 6 fgets does not, and no platform is (yet)
+known on which it does; and it would be a strange way to code fgets. Still,
+getline_via_fgets may not work correctly if it does.  The std test
+test_bufio.py should fail if platform fgets() routinely writes beyond the
+trailing null byte.  #define DONT_USE_FGETS_IN_GETLINE to disable this code.
+**************************************************************************/
+/* Use this routine if told to, or by default on non-get_unlocked()
+* platforms unless told not to.  Yikes!  Let's spell that out:
+* On a platform with getc_unlocked():
+*     By default, use getc_unlocked().
+*     If you want to use fgets() instead, #define USE_FGETS_IN_GETLINE.
+* On a platform without getc_unlocked():
+*     By default, use fgets().
+*     If you don't want to use fgets(), #define DONT_USE_FGETS_IN_GETLINE.
+*/
+#if !defined(USE_FGETS_IN_GETLINE) && !defined(HAVE_GETC_UNLOCKED)
+#define USE_FGETS_IN_GETLINE
+#endif
+#if defined(DONT_USE_FGETS_IN_GETLINE) && defined(USE_FGETS_IN_GETLINE)
+#undef USE_FGETS_IN_GETLINE
+#endif
+#ifdef USE_FGETS_IN_GETLINE
+static PyObject*
+getline_via_fgets(PyFileObject *f, FILE *fp)
+{
+/* INITBUFSIZE is the maximum line length that lets us get away with the fast
+* no-realloc, one-fgets()-call path.  Boosting it isn't free, because we have
+* to fill this much of the buffer with a known value in order to figure out
+* how much of the buffer fgets() overwrites.  So if INITBUFSIZE is larger
+* than "most" lines, we waste time filling unused buffer slots.  100 is
+* surely adequate for most peoples' email archives, chewing over source code,
+* etc -- "regular old text files".
+* MAXBUFSIZE is the maximum line length that lets us get away with the less
+* fast (but still zippy) no-realloc, two-fgets()-call path.  See above for
+* cautions about boosting that.  300 was chosen because the worst real-life
+* text-crunching job reported on Python-Dev was a mail-log crawler where over
+* half the lines were 254 chars.
+*/
+#define INITBUFSIZE 100
+#define MAXBUFSIZE 300
+	char* p;	/* temp */
+	char buf[MAXBUFSIZE];
+	PyObject* v;	/* the string object result */
+	char* pvfree;	/* address of next free slot */
+	char* pvend;    /* address one beyond last free slot */
+	size_t nfree;	/* # of free buffer slots; pvend-pvfree */
+	size_t total_v_size;  /* total # of slots in buffer */
+	size_t increment;	/* amount to increment the buffer */
+	size_t prev_v_size;
+	/* Optimize for normal case:  avoid _PyString_Resize if at all
+	 * possible via first reading into stack buffer "buf".
+	 */
+	total_v_size = INITBUFSIZE;	/* start small and pray */
+	pvfree = buf;
+	for (;;) {
+		FILE_BEGIN_ALLOW_THREADS(f)
+		pvend = buf + total_v_size;
+		nfree = pvend - pvfree;
+		memset(pvfree, '\n', nfree);
+		assert(nfree < INT_MAX); /* Should be atmost MAXBUFSIZE */
+		p = fgets(pvfree, (int)nfree, fp);
+		FILE_END_ALLOW_THREADS(f)
+		if (p == NULL) {
+			clearerr(fp);
+			if (PyErr_CheckSignals())
+				return NULL;
+			v = PyString_FromStringAndSize(buf, pvfree - buf);
+			return v;
+		}
+		/* fgets read *something* */
+		p = memchr(pvfree, '\n', nfree);
+		if (p != NULL) {
+			/* Did the \n come from fgets or from us?
+			 * Since fgets stops at the first \n, and then writes
+			 * \0, if it's from fgets a \0 must be next.  But if
+			 * that's so, it could not have come from us, since
+			 * the \n's we filled the buffer with have only more
+			 * \n's to the right.
+			 */
+			if (p+1 < pvend && *(p+1) == '\0') {
+				/* It's from fgets:  we win!  In particular,
+				 * we haven't done any mallocs yet, and can
+				 * build the final result on the first try.
+				 */
+				++p;	/* include \n from fgets */
+			}
+			else {
+				/* Must be from us:  fgets didn't fill the
+				 * buffer and didn't find a newline, so it
+				 * must be the last and newline-free line of
+				 * the file.
+				 */
+				assert(p > pvfree && *(p-1) == '\0');
+				--p;	/* don't include \0 from fgets */
+			}
+			v = PyString_FromStringAndSize(buf, p - buf);
+			return v;
+		}
+		/* yuck:  fgets overwrote all the newlines, i.e. the entire
+		 * buffer.  So this line isn't over yet, or maybe it is but
+		 * we're exactly at EOF.  If we haven't already, try using the
+		 * rest of the stack buffer.
+		 */
+		assert(*(pvend-1) == '\0');
+		if (pvfree == buf) {
+			pvfree = pvend - 1;	/* overwrite trailing null */
+			total_v_size = MAXBUFSIZE;
+		}
+		else
+			break;
+	}
+	/* The stack buffer isn't big enough; malloc a string object and read
+	 * into its buffer.
+	 */
+	total_v_size = MAXBUFSIZE << 1;
+	v = PyString_FromStringAndSize((char*)NULL, (int)total_v_size);
+	if (v == NULL)
+		return v;
+	/* copy over everything except the last null byte */
+	memcpy(BUF(v), buf, MAXBUFSIZE-1);
+	pvfree = BUF(v) + MAXBUFSIZE - 1;
+	/* Keep reading stuff into v; if it ever ends successfully, break
+	 * after setting p one beyond the end of the line.  The code here is
+	 * very much like the code above, except reads into v's buffer; see
+	 * the code above for detailed comments about the logic.
+	 */
+	for (;;) {
+		FILE_BEGIN_ALLOW_THREADS(f)
+		pvend = BUF(v) + total_v_size;
+		nfree = pvend - pvfree;
+		memset(pvfree, '\n', nfree);
+		assert(nfree < INT_MAX);
+		p = fgets(pvfree, (int)nfree, fp);
+		FILE_END_ALLOW_THREADS(f)
+		if (p == NULL) {
+			clearerr(fp);
+			if (PyErr_CheckSignals()) {
+				Py_DECREF(v);
+				return NULL;
+			}
+			p = pvfree;
+			break;
+		}
+		p = memchr(pvfree, '\n', nfree);
+		if (p != NULL) {
+			if (p+1 < pvend && *(p+1) == '\0') {
+				/* \n came from fgets */
+				++p;
+				break;
+			}
+			/* \n came from us; last line of file, no newline */
+			assert(p > pvfree && *(p-1) == '\0');
+			--p;
+			break;
+		}
+		/* expand buffer and try again */
+		assert(*(pvend-1) == '\0');
+		increment = total_v_size >> 2;	/* mild exponential growth */
+		prev_v_size = total_v_size;
+		total_v_size += increment;
+		/* check for overflow */
+		if (total_v_size <= prev_v_size ||
+		    total_v_size > PY_SSIZE_T_MAX) {
+			PyErr_SetString(PyExc_OverflowError,
+			    "line is longer than a Python string can hold");
+			Py_DECREF(v);
+			return NULL;
+		}
+		if (_PyString_Resize(&v, (int)total_v_size) < 0)
+			return NULL;
+		/* overwrite the trailing null byte */
+		pvfree = BUF(v) + (prev_v_size - 1);
+	}
+	if (BUF(v) + total_v_size != p)
+		_PyString_Resize(&v, p - BUF(v));
+	return v;
+#undef INITBUFSIZE
+#undef MAXBUFSIZE
+}
+#endif	/* ifdef USE_FGETS_IN_GETLINE */
+/* Internal routine to get a line.
+Size argument interpretation:
+> 0: max length;
+<= 0: read arbitrary line
+*/
+static PyObject *
+get_line(PyFileObject *f, int n)
+{
+	FILE *fp = f->f_fp;
+	int c;
+	char *buf, *end;
+	size_t total_v_size;	/* total # of slots in buffer */
+	size_t used_v_size;	/* # used slots in buffer */
+	size_t increment;       /* amount to increment the buffer */
+	PyObject *v;
+	int newlinetypes = f->f_newlinetypes;
+	int skipnextlf = f->f_skipnextlf;
+	int univ_newline = f->f_univ_newline;
+#if defined(USE_FGETS_IN_GETLINE)
+	if (n <= 0 && !univ_newline )
+		return getline_via_fgets(f, fp);
+#endif
+	total_v_size = n > 0 ? n : 100;
+	v = PyString_FromStringAndSize((char *)NULL, total_v_size);
+	if (v == NULL)
+		return NULL;
+	buf = BUF(v);
+	end = buf + total_v_size;
+	for (;;) {
+		FILE_BEGIN_ALLOW_THREADS(f)
+		FLOCKFILE(fp);
+		if (univ_newline) {
+			c = 'x'; /* Shut up gcc warning */
+			while ( buf != end && (c = GETC(fp)) != EOF ) {
+				if (skipnextlf ) {
+					skipnextlf = 0;
+					if (c == '\n') {
+						/* Seeing a \n here with
+						 * skipnextlf true means we
+						 * saw a \r before.
+						 */
+						newlinetypes |= NEWLINE_CRLF;
+						c = GETC(fp);
+						if (c == EOF) break;
+					} else {
+						newlinetypes |= NEWLINE_CR;
+					}
+				}
+				if (c == '\r') {
+					skipnextlf = 1;
+					c = '\n';
+				} else if ( c == '\n')
+					newlinetypes |= NEWLINE_LF;
+				*buf++ = c;
+				if (c == '\n') break;
+			}
+			if ( c == EOF && skipnextlf )
+				newlinetypes |= NEWLINE_CR;
+		} else /* If not universal newlines use the normal loop */
+		while ((c = GETC(fp)) != EOF &&
+		       (*buf++ = c) != '\n' &&
+			buf != end)
+			;
+		FUNLOCKFILE(fp);
+		FILE_END_ALLOW_THREADS(f)
+		f->f_newlinetypes = newlinetypes;
+		f->f_skipnextlf = skipnextlf;
+		if (c == '\n')
+			break;
+		if (c == EOF) {
+			if (ferror(fp)) {
+				PyErr_SetFromErrno(PyExc_IOError);
+				clearerr(fp);
+				Py_DECREF(v);
+				return NULL;
+			}
+			clearerr(fp);
+			if (PyErr_CheckSignals()) {
+				Py_DECREF(v);
+				return NULL;
+			}
+			break;
+		}
+		/* Must be because buf == end */
+		if (n > 0)
+			break;
+		used_v_size = total_v_size;
+		increment = total_v_size >> 2; /* mild exponential growth */
+		total_v_size += increment;
+		if (total_v_size > PY_SSIZE_T_MAX) {
+			PyErr_SetString(PyExc_OverflowError,
+			    "line is longer than a Python string can hold");
+			Py_DECREF(v);
+			return NULL;
+		}
+		if (_PyString_Resize(&v, total_v_size) < 0)
+			return NULL;
+		buf = BUF(v) + used_v_size;
+		end = BUF(v) + total_v_size;
+	}
+	used_v_size = buf - BUF(v);
+	if (used_v_size != total_v_size)
+		_PyString_Resize(&v, used_v_size);
+	return v;
+}
+/* External C interface */
+PyObject *
+PyFile_GetLine(PyObject *f, int n)
+{
+	PyObject *result;
+	if (f == NULL) {
+		PyErr_BadInternalCall();
+		return NULL;
+	}
+	if (PyFile_Check(f)) {
+		PyFileObject *fo = (PyFileObject *)f;
+		if (fo->f_fp == NULL)
+			return err_closed();
+		/* refuse to mix with f.next() */
+		if (fo->f_buf != NULL &&
+		    (fo->f_bufend - fo->f_bufptr) > 0 &&
+		    fo->f_buf[0] != '\0')
+			return err_iterbuffered();
+		result = get_line(fo, n);
+	}
+	else {
+		PyObject *reader;
+		PyObject *args;
+		reader = PyObject_GetAttrString(f, "readline");
+		if (reader == NULL)
+			return NULL;
+		if (n <= 0)
+			args = PyTuple_New(0);
+		else
+			args = Py_BuildValue("(i)", n);
+		if (args == NULL) {
+			Py_DECREF(reader);
+			return NULL;
+		}
+		result = PyEval_CallObject(reader, args);
+		Py_DECREF(reader);
+		Py_DECREF(args);
+		if (result != NULL && !PyString_Check(result) &&
+		    !PyUnicode_Check(result)) {
+			Py_DECREF(result);
+			result = NULL;
+			PyErr_SetString(PyExc_TypeError,
+				   "object.readline() returned non-string");
+		}
+	}
+	if (n < 0 && result != NULL && PyString_Check(result)) {
+		char *s = PyString_AS_STRING(result);
+		Py_ssize_t len = PyString_GET_SIZE(result);
+		if (len == 0) {
+			Py_DECREF(result);
+			result = NULL;
+			PyErr_SetString(PyExc_EOFError,
+					"EOF when reading a line");
+		}
+		else if (s[len-1] == '\n') {
+			if (result->ob_refcnt == 1)
+				_PyString_Resize(&result, len-1);
+			else {
+				PyObject *v;
+				v = PyString_FromStringAndSize(s, len-1);
+				Py_DECREF(result);
+				result = v;
+			}
+		}
+	}
+#ifdef Py_USING_UNICODE
+	if (n < 0 && result != NULL && PyUnicode_Check(result)) {
+		Py_UNICODE *s = PyUnicode_AS_UNICODE(result);
+		Py_ssize_t len = PyUnicode_GET_SIZE(result);
+		if (len == 0) {
+			Py_DECREF(result);
+			result = NULL;
+			PyErr_SetString(PyExc_EOFError,
+					"EOF when reading a line");
+		}
+		else if (s[len-1] == '\n') {
+			if (result->ob_refcnt == 1)
+				PyUnicode_Resize(&result, len-1);
+			else {
+				PyObject *v;
+				v = PyUnicode_FromUnicode(s, len-1);
+				Py_DECREF(result);
+				result = v;
+			}
+		}
+	}
+#endif
+	return result;
+}
+/* Python method */
+static PyObject *
+file_readline(PyFileObject *f, PyObject *args)
+{
+	int n = -1;
+	if (f->f_fp == NULL)
+		return err_closed();
+	/* refuse to mix with f.next() */
+	if (f->f_buf != NULL &&
+	    (f->f_bufend - f->f_bufptr) > 0 &&
+	    f->f_buf[0] != '\0')
+		return err_iterbuffered();
+	if (!PyArg_ParseTuple(args, "|i:readline", &n))
+		return NULL;
+	if (n == 0)
+		return PyString_FromString("");
+	if (n < 0)
+		n = 0;
+	return get_line(f, n);
+}
+static PyObject *
+file_readlines(PyFileObject *f, PyObject *args)
+{
+	long sizehint = 0;
+	PyObject *list = NULL;
+	PyObject *line;
+	char small_buffer[SMALLCHUNK];
+	char *buffer = small_buffer;
+	size_t buffersize = SMALLCHUNK;
+	PyObject *big_buffer = NULL;
+	size_t nfilled = 0;
+	size_t nread;
+	size_t totalread = 0;
+	char *p, *q, *end;
+	int err;
+	int shortread = 0;
+	if (f->f_fp == NULL)
+		return err_closed();
+	/* refuse to mix with f.next() */
+	if (f->f_buf != NULL &&
+	    (f->f_bufend - f->f_bufptr) > 0 &&
+	    f->f_buf[0] != '\0')
+		return err_iterbuffered();
+	if (!PyArg_ParseTuple(args, "|l:readlines", &sizehint))
+		return NULL;
+	if ((list = PyList_New(0)) == NULL)
+		return NULL;
+	for (;;) {
+		if (shortread)
+			nread = 0;
+		else {
+			FILE_BEGIN_ALLOW_THREADS(f)
+			errno = 0;
+			nread = Py_UniversalNewlineFread(buffer+nfilled,
+				buffersize-nfilled, f->f_fp, (PyObject *)f);
+			FILE_END_ALLOW_THREADS(f)
+			shortread = (nread < buffersize-nfilled);
+		}
+		if (nread == 0) {
+			sizehint = 0;
+			if (!ferror(f->f_fp))
+				break;
+			PyErr_SetFromErrno(PyExc_IOError);
+			clearerr(f->f_fp);
+			goto error;
+		}
+		totalread += nread;
+		p = (char *)memchr(buffer+nfilled, '\n', nread);
+		if (p == NULL) {
+			/* Need a larger buffer to fit this line */
+			nfilled += nread;
+			buffersize *= 2;
+			if (buffersize > PY_SSIZE_T_MAX) {
+				PyErr_SetString(PyExc_OverflowError,
+			    "line is longer than a Python string can hold");
+				goto error;
+			}
+			if (big_buffer == NULL) {
+				/* Create the big buffer */
+				big_buffer = PyString_FromStringAndSize(
+					NULL, buffersize);
+				if (big_buffer == NULL)
+					goto error;
+				buffer = PyString_AS_STRING(big_buffer);
+				memcpy(buffer, small_buffer, nfilled);
+			}
+			else {
+				/* Grow the big buffer */
+				if ( _PyString_Resize(&big_buffer, buffersize) < 0 )
+					goto error;
+				buffer = PyString_AS_STRING(big_buffer);
+			}
+			continue;
+		}
+		end = buffer+nfilled+nread;
+		q = buffer;
+		do {
+			/* Process complete lines */
+			p++;
+			line = PyString_FromStringAndSize(q, p-q);
+			if (line == NULL)
+				goto error;
+			err = PyList_Append(list, line);
+			Py_DECREF(line);
+			if (err != 0)
+				goto error;
+			q = p;
+			p = (char *)memchr(q, '\n', end-q);
+		} while (p != NULL);
+		/* Move the remaining incomplete line to the start */
+		nfilled = end-q;
+		memmove(buffer, q, nfilled);
+		if (sizehint > 0)
+			if (totalread >= (size_t)sizehint)
+				break;
+	}
+	if (nfilled != 0) {
+		/* Partial last line */
+		line = PyString_FromStringAndSize(buffer, nfilled);
+		if (line == NULL)
+			goto error;
+		if (sizehint > 0) {
+			/* Need to complete the last line */
+			PyObject *rest = get_line(f, 0);
+			if (rest == NULL) {
+				Py_DECREF(line);
+				goto error;
+			}
+			PyString_Concat(&line, rest);
+			Py_DECREF(rest);
+			if (line == NULL)
+				goto error;
+		}
+		err = PyList_Append(list, line);
+		Py_DECREF(line);
+		if (err != 0)
+			goto error;
+	}
+cleanup:
+	Py_XDECREF(big_buffer);
+	return list;
+error:
+	Py_CLEAR(list);
+	goto cleanup;
+}
+static PyObject *
+file_write(PyFileObject *f, PyObject *args)
+{
+	Py_buffer pbuf;
+	char *s;
+	Py_ssize_t n, n2;
+	if (f->f_fp == NULL)
+		return err_closed();
+	if (f->f_binary) {
+		if (!PyArg_ParseTuple(args, "s*", &pbuf))
+			return NULL;
+		s = pbuf.buf;
+		n = pbuf.len;
+	} else
+		if (!PyArg_ParseTuple(args, "t#", &s, &n))
+		return NULL;
+	f->f_softspace = 0;
+	FILE_BEGIN_ALLOW_THREADS(f)
+	errno = 0;
+	n2 = fwrite(s, 1, n, f->f_fp);
+	FILE_END_ALLOW_THREADS(f)
+	if (f->f_binary)
+		PyBuffer_Release(&pbuf);
+	if (n2 != n) {
+		PyErr_SetFromErrno(PyExc_IOError);
+		clearerr(f->f_fp);
+		return NULL;
+	}
+	Py_INCREF(Py_None);
+	return Py_None;
+}
+static PyObject *
+file_writelines(PyFileObject *f, PyObject *seq)
+{
+#define CHUNKSIZE 1000
+	PyObject *list, *line;
+	PyObject *it;	/* iter(seq) */
+	PyObject *result;
+	int index, islist;
+	Py_ssize_t i, j, nwritten, len;
+	assert(seq != NULL);
+	if (f->f_fp == NULL)
+		return err_closed();
+	result = NULL;
+	list = NULL;
+	islist = PyList_Check(seq);
+	if  (islist)
+		it = NULL;
+	else {
+		it = PyObject_GetIter(seq);
+		if (it == NULL) {
+			PyErr_SetString(PyExc_TypeError,
+				"writelines() requires an iterable argument");
+			return NULL;
+		}
+		/* From here on, fail by going to error, to reclaim "it". */
+		list = PyList_New(CHUNKSIZE);
+		if (list == NULL)
+			goto error;
+	}
+	/* Strategy: slurp CHUNKSIZE lines into a private list,
+	   checking that they are all strings, then write that list
+	   without holding the interpreter lock, then come back for more. */
+	for (index = 0; ; index += CHUNKSIZE) {
+		if (islist) {
+			Py_XDECREF(list);
+			list = PyList_GetSlice(seq, index, index+CHUNKSIZE);
+			if (list == NULL)
+				goto error;
+			j = PyList_GET_SIZE(list);
+		}
+		else {
+			for (j = 0; j < CHUNKSIZE; j++) {
+				line = PyIter_Next(it);
+				if (line == NULL) {
+					if (PyErr_Occurred())
+						goto error;
+					break;
+				}
+				PyList_SetItem(list, j, line);
+			}
+		}
+		if (j == 0)
+			break;
+		/* Check that all entries are indeed strings. If not,
+		   apply the same rules as for file.write() and
+		   convert the results to strings. This is slow, but
+		   seems to be the only way since all conversion APIs
+		   could potentially execute Python code. */
+		for (i = 0; i < j; i++) {
+			PyObject *v = PyList_GET_ITEM(list, i);
+			if (!PyString_Check(v)) {
+			    	const char *buffer;
+				if (((f->f_binary &&
+				      PyObject_AsReadBuffer(v,
+					      (const void**)&buffer,
+							    &len)) ||
+				     PyObject_AsCharBuffer(v,
+							   &buffer,
+							   &len))) {
+					PyErr_SetString(PyExc_TypeError,
+			"writelines() argument must be a sequence of strings");
+					goto error;
+				}
+				line = PyString_FromStringAndSize(buffer,
+								  len);
+				if (line == NULL)
+					goto error;
+				Py_DECREF(v);
+				PyList_SET_ITEM(list, i, line);
+			}
+		}
+		/* Since we are releasing the global lock, the
+		   following code may *not* execute Python code. */
+		f->f_softspace = 0;
+		FILE_BEGIN_ALLOW_THREADS(f)
+		errno = 0;
+		for (i = 0; i < j; i++) {
+		    	line = PyList_GET_ITEM(list, i);
+			len = PyString_GET_SIZE(line);
+			nwritten = fwrite(PyString_AS_STRING(line),
+					  1, len, f->f_fp);
+			if (nwritten != len) {
+				FILE_ABORT_ALLOW_THREADS(f)
+				PyErr_SetFromErrno(PyExc_IOError);
+				clearerr(f->f_fp);
+				goto error;
+			}
+		}
+		FILE_END_ALLOW_THREADS(f)
+		if (j < CHUNKSIZE)
+			break;
+	}
+	Py_INCREF(Py_None);
+	result = Py_None;
+error:
+	Py_XDECREF(list);
+	Py_XDECREF(it);
+	return result;
+#undef CHUNKSIZE
+}
+static PyObject *
+file_self(PyFileObject *f)
+{
+	if (f->f_fp == NULL)
+		return err_closed();
+	Py_INCREF(f);
+	return (PyObject *)f;
+}
+static PyObject *
+file_xreadlines(PyFileObject *f)
+{
+	if (PyErr_WarnPy3k("f.xreadlines() not supported in 3.x, "
+			   "try 'for line in f' instead", 1) < 0)
+	       return NULL;
+	return file_self(f);
+}
+static PyObject *
+file_exit(PyObject *f, PyObject *args)
+{
+	PyObject *ret = PyObject_CallMethod(f, "close", NULL);
+	if (!ret)
+		/* If error occurred, pass through */
+		return NULL;
+	Py_DECREF(ret);
+	/* We cannot return the result of close since a true
+	 * value will be interpreted as "yes, swallow the
+	 * exception if one was raised inside the with block". */
+	Py_RETURN_NONE;
+}
+PyDoc_STRVAR(readline_doc,
+"readline([size]) -> next line from the file, as a string.\n"
+"\n"
+"Retain newline.  A non-negative size argument limits the maximum\n"
+"number of bytes to return (an incomplete line may be returned then).\n"
+"Return an empty string at EOF.");
+PyDoc_STRVAR(read_doc,
+"read([size]) -> read at most size bytes, returned as a string.\n"
+"\n"
+"If the size argument is negative or omitted, read until EOF is reached.\n"
+"Notice that when in non-blocking mode, less data than what was requested\n"
+"may be returned, even if no size parameter was given.");
+PyDoc_STRVAR(write_doc,
+"write(str) -> None.  Write string str to file.\n"
+"\n"
+"Note that due to buffering, flush() or close() may be needed before\n"
+"the file on disk reflects the data written.");
+PyDoc_STRVAR(fileno_doc,
+"fileno() -> integer \"file descriptor\".\n"
+"\n"
+"This is needed for lower-level file interfaces, such os.read().");
+PyDoc_STRVAR(seek_doc,
+"seek(offset[, whence]) -> None.  Move to new file position.\n"
+"\n"
+"Argument offset is a byte count.  Optional argument whence defaults to\n"
+"0 (offset from start of file, offset should be >= 0); other values are 1\n"
+"(move relative to current position, positive or negative), and 2 (move\n"
+"relative to end of file, usually negative, although many platforms allow\n"
+"seeking beyond the end of a file).  If the file is opened in text mode,\n"
+"only offsets returned by tell() are legal.  Use of other offsets causes\n"
+"undefined behavior."
+"\n"
+"Note that not all file objects are seekable.");
+#ifdef HAVE_FTRUNCATE
+PyDoc_STRVAR(truncate_doc,
+"truncate([size]) -> None.  Truncate the file to at most size bytes.\n"
+"\n"
+"Size defaults to the current file position, as returned by tell().");
+#endif
+PyDoc_STRVAR(tell_doc,
+"tell() -> current file position, an integer (may be a long integer).");
+PyDoc_STRVAR(readinto_doc,
+"readinto() -> Undocumented.  Don't use this; it may go away.");
+PyDoc_STRVAR(readlines_doc,
+"readlines([size]) -> list of strings, each a line from the file.\n"
+"\n"
+"Call readline() repeatedly and return a list of the lines so read.\n"
+"The optional size argument, if given, is an approximate bound on the\n"
+"total number of bytes in the lines returned.");
+PyDoc_STRVAR(xreadlines_doc,
+"xreadlines() -> returns self.\n"
+"\n"
+"For backward compatibility. File objects now include the performance\n"
+"optimizations previously implemented in the xreadlines module.");
+PyDoc_STRVAR(writelines_doc,
+"writelines(sequence_of_strings) -> None.  Write the strings to the file.\n"
+"\n"
+"Note that newlines are not added.  The sequence can be any iterable object\n"
+"producing strings. This is equivalent to calling write() for each string.");
+PyDoc_STRVAR(flush_doc,
+"flush() -> None.  Flush the internal I/O buffer.");
+PyDoc_STRVAR(close_doc,
+"close() -> None or (perhaps) an integer.  Close the file.\n"
+"\n"
+"Sets data attribute .closed to True.  A closed file cannot be used for\n"
+"further I/O operations.  close() may be called more than once without\n"
+"error.  Some kinds of file objects (for example, opened by popen())\n"
+"may return an exit status upon closing.");
+PyDoc_STRVAR(isatty_doc,
+"isatty() -> true or false.  True if the file is connected to a tty device.");
+PyDoc_STRVAR(enter_doc,
+	     "__enter__() -> self.");
+PyDoc_STRVAR(exit_doc,
+	     "__exit__(*excinfo) -> None.  Closes the file.");
+static PyMethodDef file_methods[] = {
+	{"readline",  (PyCFunction)file_readline, METH_VARARGS, readline_doc},
+	{"read",      (PyCFunction)file_read,     METH_VARARGS, read_doc},
+	{"write",     (PyCFunction)file_write,    METH_VARARGS, write_doc},
+	{"fileno",    (PyCFunction)file_fileno,   METH_NOARGS,  fileno_doc},
+	{"seek",      (PyCFunction)file_seek,     METH_VARARGS, seek_doc},
+#ifdef HAVE_FTRUNCATE
+	{"truncate",  (PyCFunction)file_truncate, METH_VARARGS, truncate_doc},
+#endif
+	{"tell",      (PyCFunction)file_tell,     METH_NOARGS,  tell_doc},
+	{"readinto",  (PyCFunction)file_readinto, METH_VARARGS, readinto_doc},
+	{"readlines", (PyCFunction)file_readlines, METH_VARARGS, readlines_doc},
+	{"xreadlines",(PyCFunction)file_xreadlines, METH_NOARGS, xreadlines_doc},
+	{"writelines",(PyCFunction)file_writelines, METH_O,     writelines_doc},
+	{"flush",     (PyCFunction)file_flush,    METH_NOARGS,  flush_doc},
+	{"close",     (PyCFunction)file_close,    METH_NOARGS,  close_doc},
+	{"isatty",    (PyCFunction)file_isatty,   METH_NOARGS,  isatty_doc},
+	{"__enter__", (PyCFunction)file_self,     METH_NOARGS,  enter_doc},
+	{"__exit__",  (PyCFunction)file_exit,     METH_VARARGS, exit_doc},
+	{NULL,	      NULL}		/* sentinel */
+};
+#define OFF(x) offsetof(PyFileObject, x)
+static PyMemberDef file_memberlist[] = {
+	{"mode",	T_OBJECT,	OFF(f_mode),	RO,
+	 "file mode ('r', 'U', 'w', 'a', possibly with 'b' or '+' added)"},
+	{"name",	T_OBJECT,	OFF(f_name),	RO,
+	 "file name"},
+	{"encoding",	T_OBJECT,	OFF(f_encoding),	RO,
+	 "file encoding"},
+	{"errors",	T_OBJECT,	OFF(f_errors),	RO,
+	 "Unicode error handler"},
+	/* getattr(f, "closed") is implemented without this table */
+	{NULL}	/* Sentinel */
+};
+static PyObject *
+get_closed(PyFileObject *f, void *closure)
+{
+	return PyBool_FromLong((long)(f->f_fp == 0));
+}
+static PyObject *
+get_newlines(PyFileObject *f, void *closure)
+{
+	switch (f->f_newlinetypes) {
+	case NEWLINE_UNKNOWN:
+		Py_INCREF(Py_None);
+		return Py_None;
+	case NEWLINE_CR:
+		return PyString_FromString("\r");
+	case NEWLINE_LF:
+		return PyString_FromString("\n");
+	case NEWLINE_CR|NEWLINE_LF:
+		return Py_BuildValue("(ss)", "\r", "\n");
+	case NEWLINE_CRLF:
+		return PyString_FromString("\r\n");
+	case NEWLINE_CR|NEWLINE_CRLF:
+		return Py_BuildValue("(ss)", "\r", "\r\n");
+	case NEWLINE_LF|NEWLINE_CRLF:
+		return Py_BuildValue("(ss)", "\n", "\r\n");
+	case NEWLINE_CR|NEWLINE_LF|NEWLINE_CRLF:
+		return Py_BuildValue("(sss)", "\r", "\n", "\r\n");
+	default:
+		PyErr_Format(PyExc_SystemError,
+			     "Unknown newlines value 0x%x\n",
+			     f->f_newlinetypes);
+		return NULL;
+	}
+}
+static PyObject *
+get_softspace(PyFileObject *f, void *closure)
+{
+	if (PyErr_WarnPy3k("file.softspace not supported in 3.x", 1) < 0)
+		return NULL;
+	return PyInt_FromLong(f->f_softspace);
+}
+static int
+set_softspace(PyFileObject *f, PyObject *value)
+{
+	int new;
+	if (PyErr_WarnPy3k("file.softspace not supported in 3.x", 1) < 0)
+		return -1;
+	if (value == NULL) {
+		PyErr_SetString(PyExc_TypeError,
+				"can't delete softspace attribute");
+		return -1;
+	}
+	new = PyInt_AsLong(value);
+	if (new == -1 && PyErr_Occurred())
+		return -1;
+	f->f_softspace = new;
+	return 0;
+}
+static PyGetSetDef file_getsetlist[] = {
+	{"closed", (getter)get_closed, NULL, "True if the file is closed"},
+	{"newlines", (getter)get_newlines, NULL,
+	 "end-of-line convention used in this file"},
+	{"softspace", (getter)get_softspace, (setter)set_softspace,
+	 "flag indicating that a space needs to be printed; used by print"},
+	{0},
+};
+static void
+drop_readahead(PyFileObject *f)
+{
+	if (f->f_buf != NULL) {
+		PyMem_Free(f->f_buf);
+		f->f_buf = NULL;
+	}
+}
+/* Make sure that file has a readahead buffer with at least one byte
+(unless at EOF) and no more than bufsize.  Returns negative value on
+error, will set MemoryError if bufsize bytes cannot be allocated. */
+static int
+readahead(PyFileObject *f, int bufsize)
+{
+	Py_ssize_t chunksize;
+	if (f->f_buf != NULL) {
+		if( (f->f_bufend - f->f_bufptr) >= 1)
+			return 0;
+		else
+			drop_readahead(f);
+	}
+	if ((f->f_buf = (char *)PyMem_Malloc(bufsize)) == NULL) {
+		PyErr_NoMemory();
+		return -1;
+	}
+	FILE_BEGIN_ALLOW_THREADS(f)
+	errno = 0;
+	chunksize = Py_UniversalNewlineFread(
+		f->f_buf, bufsize, f->f_fp, (PyObject *)f);
+	FILE_END_ALLOW_THREADS(f)
+	if (chunksize == 0) {
+		if (ferror(f->f_fp)) {
+			PyErr_SetFromErrno(PyExc_IOError);
+			clearerr(f->f_fp);
+			drop_readahead(f);
+			return -1;
+		}
+	}
+	f->f_bufptr = f->f_buf;
+	f->f_bufend = f->f_buf + chunksize;
+	return 0;
+}
+/* Used by file_iternext.  The returned string will start with 'skip'
+uninitialized bytes followed by the remainder of the line. Don't be
+horrified by the recursive call: maximum recursion depth is limited by
+logarithmic buffer growth to about 50 even when reading a 1gb line. */
+static PyStringObject *
+readahead_get_line_skip(PyFileObject *f, int skip, int bufsize)
+{
+	PyStringObject* s;
+	char *bufptr;
+	char *buf;
+	Py_ssize_t len;
+	if (f->f_buf == NULL)
+		if (readahead(f, bufsize) < 0)
+			return NULL;
+	len = f->f_bufend - f->f_bufptr;
+	if (len == 0)
+		return (PyStringObject *)
+			PyString_FromStringAndSize(NULL, skip);
+	bufptr = (char *)memchr(f->f_bufptr, '\n', len);
+	if (bufptr != NULL) {
+		bufptr++;			/* Count the '\n' */
+		len = bufptr - f->f_bufptr;
+		s = (PyStringObject *)
+			PyString_FromStringAndSize(NULL, skip+len);
+		if (s == NULL)
+			return NULL;
+		memcpy(PyString_AS_STRING(s)+skip, f->f_bufptr, len);
+		f->f_bufptr = bufptr;
+		if (bufptr == f->f_bufend)
+			drop_readahead(f);
+	} else {
+		bufptr = f->f_bufptr;
+		buf = f->f_buf;
+		f->f_buf = NULL; 	/* Force new readahead buffer */
+		assert(skip+len < INT_MAX);
+s = readahead_get_line_skip(
+			f, (int)(skip+len), bufsize + (bufsize>>2) );
+		if (s == NULL) {
+		        PyMem_Free(buf);
+			return NULL;
+		}
+		memcpy(PyString_AS_STRING(s)+skip, bufptr, len);
+		PyMem_Free(buf);
+	}
+	return s;
+}
+/* A larger buffer size may actually decrease performance. */
+#define READAHEAD_BUFSIZE 8192
+static PyObject *
+file_iternext(PyFileObject *f)
+{
+	PyStringObject* l;
+	if (f->f_fp == NULL)
+		return err_closed();
+	l = readahead_get_line_skip(f, 0, READAHEAD_BUFSIZE);
+	if (l == NULL || PyString_GET_SIZE(l) == 0) {
+		Py_XDECREF(l);
+		return NULL;
+	}
+	return (PyObject *)l;
+}
+static PyObject *
+file_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
+{
+	PyObject *self;
+	static PyObject *not_yet_string;
+	assert(type != NULL && type->tp_alloc != NULL);
+	if (not_yet_string == NULL) {
+		not_yet_string = PyString_InternFromString("<uninitialized file>");
+		if (not_yet_string == NULL)
+			return NULL;
+	}
+	self = type->tp_alloc(type, 0);
+	if (self != NULL) {
+		/* Always fill in the name and mode, so that nobody else
+		   needs to special-case NULLs there. */
+		Py_INCREF(not_yet_string);
+		((PyFileObject *)self)->f_name = not_yet_string;
+		Py_INCREF(not_yet_string);
+		((PyFileObject *)self)->f_mode = not_yet_string;
+		Py_INCREF(Py_None);
+		((PyFileObject *)self)->f_encoding = Py_None;
+		Py_INCREF(Py_None);
+		((PyFileObject *)self)->f_errors = Py_None;
+		((PyFileObject *)self)->weakreflist = NULL;
+		((PyFileObject *)self)->unlocked_count = 0;
+	}
+	return self;
+}
+static int
+file_init(PyObject *self, PyObject *args, PyObject *kwds)
+{
+	PyFileObject *foself = (PyFileObject *)self;
+	int ret = 0;
+	static char *kwlist[] = {"name", "mode", "buffering", 0};
+	char *name = NULL;
+	char *mode = "r";
+	int bufsize = -1;
+	int wideargument = 0;
+	assert(PyFile_Check(self));
+	if (foself->f_fp != NULL) {
+		/* Have to close the existing file first. */
+		PyObject *closeresult = file_close(foself);
+		if (closeresult == NULL)
+			return -1;
+		Py_DECREF(closeresult);
+	}
+#ifdef Py_WIN_WIDE_FILENAMES
+	if (GetVersion() < 0x80000000) {    /* On NT, so wide API available */
+		PyObject *po;
+		if (PyArg_ParseTupleAndKeywords(args, kwds, "U|si:file",
+						kwlist, &po, &mode, &bufsize)) {
+			wideargument = 1;
+			if (fill_file_fields(foself, NULL, po, mode,
+					     fclose) == NULL)
+				goto Error;
+		} else {
+			/* Drop the argument parsing error as narrow
+			   strings are also valid. */
+			PyErr_Clear();
+		}
+	}
+#endif
+	if (!wideargument) {
+PyObject *o_name;
+		if (!PyArg_ParseTupleAndKeywords(args, kwds, "et|si:file", kwlist,
+						 Py_FileSystemDefaultEncoding,
+						 &name,
+						 &mode, &bufsize))
+			return -1;
+/* We parse again to get the name as a PyObject */
+if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|si:file",
+kwlist, &o_name, &mode,
+&bufsize))
+goto Error;
+		if (fill_file_fields(foself, NULL, o_name, mode,
+				     fclose) == NULL)
+			goto Error;
+	}
+	if (open_the_file(foself, name, mode) == NULL)
+		goto Error;
+	foself->f_setbuf = NULL;
+	PyFile_SetBufSize(self, bufsize);
+	goto Done;
+Error:
+	ret = -1;
+	/* fall through */
+Done:
+	PyMem_Free(name); /* free the encoded string */
+	return ret;
+}
+PyDoc_VAR(file_doc) =
+PyDoc_STR(
+"file(name[, mode[, buffering]]) -> file object\n"
+"\n"
+"Open a file.  The mode can be 'r', 'w' or 'a' for reading (default),\n"
+"writing or appending.  The file will be created if it doesn't exist\n"
+"when opened for writing or appending; it will be truncated when\n"
+"opened for writing.  Add a 'b' to the mode for binary files.\n"
+"Add a '+' to the mode to allow simultaneous reading and writing.\n"
+"If the buffering argument is given, 0 means unbuffered, 1 means line\n"
+"buffered, and larger numbers specify the buffer size.  The preferred way\n"
+"to open a file is with the builtin open() function.\n"
+)
+PyDoc_STR(
+"Add a 'U' to mode to open the file for input with universal newline\n"
+"support.  Any line ending in the input file will be seen as a '\\n'\n"
+"in Python.  Also, a file so opened gains the attribute 'newlines';\n"
+"the value for this attribute is one of None (no newline read yet),\n"
+"'\\r', '\\n', '\\r\\n' or a tuple containing all the newline types seen.\n"
+"\n"
+"'U' cannot be combined with 'w' or '+' mode.\n"
+);
+PyTypeObject PyFile_Type = {
+	PyVarObject_HEAD_INIT(&PyType_Type, 0)
+	"file",
+	sizeof(PyFileObject),
+	0,
+	(destructor)file_dealloc,		/* tp_dealloc */
+	0,					/* tp_print */
+	0,			 		/* tp_getattr */
+	0,			 		/* tp_setattr */
+	0,					/* tp_compare */
+	(reprfunc)file_repr, 			/* tp_repr */
+	0,					/* tp_as_number */
+	0,					/* tp_as_sequence */
+	0,					/* tp_as_mapping */
+	0,					/* tp_hash */
+	0,					/* tp_call */
+	0,					/* tp_str */
+	PyObject_GenericGetAttr,		/* tp_getattro */
+	/* softspace is writable:  we must supply tp_setattro */
+	PyObject_GenericSetAttr,		/* tp_setattro */
+	0,					/* tp_as_buffer */
+	Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_WEAKREFS, /* tp_flags */
+	file_doc,				/* tp_doc */
+	0,					/* tp_traverse */
+	0,					/* tp_clear */
+	0,					/* tp_richcompare */
+	offsetof(PyFileObject, weakreflist),	/* tp_weaklistoffset */
+	(getiterfunc)file_self,			/* tp_iter */
+	(iternextfunc)file_iternext,		/* tp_iternext */
+	file_methods,				/* tp_methods */
+	file_memberlist,			/* tp_members */
+	file_getsetlist,			/* tp_getset */
+	0,					/* tp_base */
+	0,					/* tp_dict */
+	0,					/* tp_descr_get */
+	0,					/* tp_descr_set */
+	0,					/* tp_dictoffset */
+	file_init,				/* tp_init */
+	PyType_GenericAlloc,			/* tp_alloc */
+	file_new,				/* tp_new */
+	PyObject_Del,                           /* tp_free */
+};
+/* Interface for the 'soft space' between print items. */
+int
+PyFile_SoftSpace(PyObject *f, int newflag)
+{
+	long oldflag = 0;
+	if (f == NULL) {
+		/* Do nothing */
+	}
+	else if (PyFile_Check(f)) {
+		oldflag = ((PyFileObject *)f)->f_softspace;
+		((PyFileObject *)f)->f_softspace = newflag;
+	}
+	else {
+		PyObject *v;
+		v = PyObject_GetAttrString(f, "softspace");
+		if (v == NULL)
+			PyErr_Clear();
+		else {
+			if (PyInt_Check(v))
+				oldflag = PyInt_AsLong(v);
+			assert(oldflag < INT_MAX);
+			Py_DECREF(v);
+		}
+		v = PyInt_FromLong((long)newflag);
+		if (v == NULL)
+			PyErr_Clear();
+		else {
+			if (PyObject_SetAttrString(f, "softspace", v) != 0)
+				PyErr_Clear();
+			Py_DECREF(v);
+		}
+	}
+	return (int)oldflag;
+}
+/* Interfaces to write objects/strings to file-like objects */
+int
+PyFile_WriteObject(PyObject *v, PyObject *f, int flags)
+{
+	PyObject *writer, *value, *args, *result;
+	if (f == NULL) {
+		PyErr_SetString(PyExc_TypeError, "writeobject with NULL file");
+		return -1;
+	}
+	else if (PyFile_Check(f)) {
+		PyFileObject *fobj = (PyFileObject *) f;
+#ifdef Py_USING_UNICODE
+		PyObject *enc = fobj->f_encoding;
+		int result;
+#endif
+		if (fobj->f_fp == NULL) {
+			err_closed();
+			return -1;
+		}
+#ifdef Py_USING_UNICODE
+if ((flags & Py_PRINT_RAW) &&
+		    PyUnicode_Check(v) && enc != Py_None) {
+			char *cenc = PyString_AS_STRING(enc);
+			char *errors = fobj->f_errors == Py_None ?
+			  "strict" : PyString_AS_STRING(fobj->f_errors);
+			value = PyUnicode_AsEncodedString(v, cenc, errors);
+			if (value == NULL)
+				return -1;
+		} else {
+			value = v;
+			Py_INCREF(value);
+		}
+		result = file_PyObject_Print(value, fobj, flags);
+		Py_DECREF(value);
+		return result;
+#else
+		return file_PyObject_Print(v, fobj, flags);
+#endif
+	}
+	writer = PyObject_GetAttrString(f, "write");
+	if (writer == NULL)
+		return -1;
+	if (flags & Py_PRINT_RAW) {
+if (PyUnicode_Check(v)) {
+value = v;
+Py_INCREF(value);
+} else
+value = PyObject_Str(v);
+	}
+else
+		value = PyObject_Repr(v);
+	if (value == NULL) {
+		Py_DECREF(writer);
+		return -1;
+	}
+	args = PyTuple_Pack(1, value);
+	if (args == NULL) {
+		Py_DECREF(value);
+		Py_DECREF(writer);
+		return -1;
+	}
+	result = PyEval_CallObject(writer, args);
+	Py_DECREF(args);
+	Py_DECREF(value);
+	Py_DECREF(writer);
+	if (result == NULL)
+		return -1;
+	Py_DECREF(result);
+	return 0;
+}
+int
+PyFile_WriteString(const char *s, PyObject *f)
+{
+	if (f == NULL) {
+		/* Should be caused by a pre-existing error */
+		if (!PyErr_Occurred())
+			PyErr_SetString(PyExc_SystemError,
+					"null file for PyFile_WriteString");
+		return -1;
+	}
+	else if (PyFile_Check(f)) {
+		PyFileObject *fobj = (PyFileObject *) f;
+		FILE *fp = PyFile_AsFile(f);
+		if (fp == NULL) {
+			err_closed();
+			return -1;
+		}
+		FILE_BEGIN_ALLOW_THREADS(fobj)
+		fputs(s, fp);
+		FILE_END_ALLOW_THREADS(fobj)
+		return 0;
+	}
+	else if (!PyErr_Occurred()) {
+		PyObject *v = PyString_FromString(s);
+		int err;
+		if (v == NULL)
+			return -1;
+		err = PyFile_WriteObject(v, f, Py_PRINT_RAW);
+		Py_DECREF(v);
+		return err;
+	}
+	else
+		return -1;
+}
+/* Try to get a file-descriptor from a Python object.  If the object
+is an integer or long integer, its value is returned.  If not, the
+object's fileno() method is called if it exists; the method must return
+an integer or long integer, which is returned as the file descriptor value.
+-1 is returned on failure.
+*/
+int PyObject_AsFileDescriptor(PyObject *o)
+{
+	int fd;
+	PyObject *meth;
+	if (PyInt_Check(o)) {
+		fd = PyInt_AsLong(o);
+	}
+	else if (PyLong_Check(o)) {
+		fd = PyLong_AsLong(o);
+	}
+	else if ((meth = PyObject_GetAttrString(o, "fileno")) != NULL)
+	{
+		PyObject *fno = PyEval_CallObject(meth, NULL);
+		Py_DECREF(meth);
+		if (fno == NULL)
+			return -1;
+		if (PyInt_Check(fno)) {
+			fd = PyInt_AsLong(fno);
+			Py_DECREF(fno);
+		}
+		else if (PyLong_Check(fno)) {
+			fd = PyLong_AsLong(fno);
+			Py_DECREF(fno);
+		}
+		else {
+			PyErr_SetString(PyExc_TypeError,
+					"fileno() returned a non-integer");
+			Py_DECREF(fno);
+			return -1;
+		}
+	}
+	else {
+		PyErr_SetString(PyExc_TypeError,
+				"argument must be an int, or have a fileno() method.");
+		return -1;
+	}
+	if (fd < 0) {
+		PyErr_Format(PyExc_ValueError,
+			     "file descriptor cannot be a negative integer (%i)",
+			     fd);
+		return -1;
+	}
+	return fd;
+}
+/* From here on we need access to the real fgets and fread */
+#undef fgets
+#undef fread
+/*
+** Py_UniversalNewlineFgets is an fgets variation that understands
+** all of \r, \n and \r\n conventions.
+** The stream should be opened in binary mode.
+** If fobj is NULL the routine always does newline conversion, and
+** it may peek one char ahead to gobble the second char in \r\n.
+** If fobj is non-NULL it must be a PyFileObject. In this case there
+** is no readahead but in stead a flag is used to skip a following
+** \n on the next read. Also, if the file is open in binary mode
+** the whole conversion is skipped. Finally, the routine keeps track of
+** the different types of newlines seen.
+** Note that we need no error handling: fgets() treats error and eof
+** identically.
+*/
+char *
+Py_UniversalNewlineFgets(char *buf, int n, FILE *stream, PyObject *fobj)
+{
+	char *p = buf;
+	int c;
+	int newlinetypes = 0;
+	int skipnextlf = 0;
+	int univ_newline = 1;
+	if (fobj) {
+		if (!PyFile_Check(fobj)) {
+			errno = ENXIO;	/* What can you do... */
+			return NULL;
+		}
+		univ_newline = ((PyFileObject *)fobj)->f_univ_newline;
+		if ( !univ_newline )
+			return fgets(buf, n, stream);
+		newlinetypes = ((PyFileObject *)fobj)->f_newlinetypes;
+		skipnextlf = ((PyFileObject *)fobj)->f_skipnextlf;
+	}
+	FLOCKFILE(stream);
+	c = 'x'; /* Shut up gcc warning */
+	while (--n > 0 && (c = GETC(stream)) != EOF ) {
+		if (skipnextlf ) {
+			skipnextlf = 0;
+			if (c == '\n') {
+				/* Seeing a \n here with skipnextlf true
+				** means we saw a \r before.
+				*/
+				newlinetypes |= NEWLINE_CRLF;
+				c = GETC(stream);
+				if (c == EOF) break;
+			} else {
+				/*
+				** Note that c == EOF also brings us here,
+				** so we're okay if the last char in the file
+				** is a CR.
+				*/
+				newlinetypes |= NEWLINE_CR;
+			}
+		}
+		if (c == '\r') {
+			/* A \r is translated into a \n, and we skip
+			** an adjacent \n, if any. We don't set the
+			** newlinetypes flag until we've seen the next char.
+			*/
+			skipnextlf = 1;
+			c = '\n';
+		} else if ( c == '\n') {
+			newlinetypes |= NEWLINE_LF;
+		}
+		*p++ = c;
+		if (c == '\n') break;
+	}
+	if ( c == EOF && skipnextlf )
+		newlinetypes |= NEWLINE_CR;
+	FUNLOCKFILE(stream);
+	*p = '\0';
+	if (fobj) {
+		((PyFileObject *)fobj)->f_newlinetypes = newlinetypes;
+		((PyFileObject *)fobj)->f_skipnextlf = skipnextlf;
+	} else if ( skipnextlf ) {
+		/* If we have no file object we cannot save the
+		** skipnextlf flag. We have to readahead, which
+		** will cause a pause if we're reading from an
+		** interactive stream, but that is very unlikely
+		** unless we're doing something silly like
+		** execfile("/dev/tty").
+		*/
+		c = GETC(stream);
+		if ( c != '\n' )
+			ungetc(c, stream);
+	}
+	if (p == buf)
+		return NULL;
+	return buf;
+}
+/*
+** Py_UniversalNewlineFread is an fread variation that understands
+** all of \r, \n and \r\n conventions.
+** The stream should be opened in binary mode.
+** fobj must be a PyFileObject. In this case there
+** is no readahead but in stead a flag is used to skip a following
+** \n on the next read. Also, if the file is open in binary mode
+** the whole conversion is skipped. Finally, the routine keeps track of
+** the different types of newlines seen.
+*/
+size_t
+Py_UniversalNewlineFread(char *buf, size_t n,
+			 FILE *stream, PyObject *fobj)
+{
+	char *dst = buf;
+	PyFileObject *f = (PyFileObject *)fobj;
+	int newlinetypes, skipnextlf;
+	assert(buf != NULL);
+	assert(stream != NULL);
+	if (!fobj || !PyFile_Check(fobj)) {
+		errno = ENXIO;	/* What can you do... */
+		return 0;
+	}
+	if (!f->f_univ_newline)
+		return fread(buf, 1, n, stream);
+	newlinetypes = f->f_newlinetypes;
+	skipnextlf = f->f_skipnextlf;
+	/* Invariant:  n is the number of bytes remaining to be filled
+	 * in the buffer.
+	 */
+	while (n) {
+		size_t nread;
+		int shortread;
+		char *src = dst;
+		nread = fread(dst, 1, n, stream);
+		assert(nread <= n);
+		if (nread == 0)
+			break;
+		n -= nread; /* assuming 1 byte out for each in; will adjust */
+		shortread = n != 0;	/* true iff EOF or error */
+		while (nread--) {
+			char c = *src++;
+			if (c == '\r') {
+				/* Save as LF and set flag to skip next LF. */
+				*dst++ = '\n';
+				skipnextlf = 1;
+			}
+			else if (skipnextlf && c == '\n') {
+				/* Skip LF, and remember we saw CR LF. */
+				skipnextlf = 0;
+				newlinetypes |= NEWLINE_CRLF;
+				++n;
+			}
+			else {
+				/* Normal char to be stored in buffer.  Also
+				 * update the newlinetypes flag if either this
+				 * is an LF or the previous char was a CR.
+				 */
+				if (c == '\n')
+					newlinetypes |= NEWLINE_LF;
+				else if (skipnextlf)
+					newlinetypes |= NEWLINE_CR;
+				*dst++ = c;
+				skipnextlf = 0;
+			}
+		}
+		if (shortread) {
+			/* If this is EOF, update type flags. */
+			if (skipnextlf && feof(stream))
+				newlinetypes |= NEWLINE_CR;
+			break;
+		}
+	}
+	f->f_newlinetypes = newlinetypes;
+	f->f_skipnextlf = skipnextlf;
+	return dst - buf;
+}
+#ifdef __cplusplus
+}
+#endif