-/* File object implementation */
+/* File object implementation (what's left of it -- see io.py) */
#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)
#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 */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-FILE *
-PyFile_AsFile(PyObject *f)
-{
- if (f == NULL || !PyFile_Check(f))
- return NULL;
- else
- return ((PyFileObject *)f)->f_fp;
-}
-
-PyObject *
-PyFile_Name(PyObject *f)
-{
- if (f == NULL || !PyFile_Check(f))
- return NULL;
- else
- return ((PyFileObject *)f)->f_name;
-}
-
-/* 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)) {
-#ifdef HAVE_STRERROR
- char *msg = strerror(EISDIR);
-#else
- char *msg = "Is a directory";
-#endif
- 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_INCREF(name);
- f->f_name = name;
-
- f->f_mode = PyString_FromString(mode);
-
- f->f_close = close;
- 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;
-
- 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;
- }
-
- 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) {
- Py_BEGIN_ALLOW_THREADS
- /* 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));
- Py_END_ALLOW_THREADS
- }
- Py_XDECREF(wmode);
- }
-#endif
- if (NULL == f->f_fp && NULL != name) {
- Py_BEGIN_ALLOW_THREADS
- f->f_fp = fopen(name, newmode);
- Py_END_ALLOW_THREADS
- }
-
- 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
- if (errno == EINVAL)
- PyErr_Format(PyExc_IOError, "invalid mode: %s",
- mode);
- else
- PyErr_SetFromErrnoWithFilenameObject(PyExc_IOError, f->f_name);
- f = NULL;
- }
- if (f != NULL)
- f = dircheck(f);
-
-cleanup:
- PyMem_FREE(newmode);
-
- return (PyObject *)f;
-}
-
-PyObject *
-PyFile_FromFile(FILE *fp, char *name, char *mode, int (*close)(FILE *))
-{
- PyObject *io = NULL, *stream = NULL;
-
- io = PyImport_ImportModule("io");
- if (io == NULL)
- return NULL;
- stream = PyObject_CallMethod(io, "open", "ss", name, mode);
- if (stream == NULL) {
- Py_XDECREF(io);
- return NULL;
- }
- if (close != NULL)
- close(fp);
- return stream;
-}
-
-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.
- Returh 1 on success, 0 on failure. */
-
-int
-PyFile_SetEncoding(PyObject *f, const char *enc)
-{
- PyFileObject *file = (PyFileObject*)f;
- PyObject *str = PyString_FromString(enc);
-
- assert(PyFile_Check(f));
- if (!str)
- return 0;
- Py_DECREF(file->f_encoding);
- file->f_encoding = str;
- 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)
-{
- int sts = 0;
- if (f->weakreflist != NULL)
- PyObject_ClearWeakRefs((PyObject *) f);
- if (f->f_fp != NULL && f->f_close != NULL) {
- Py_BEGIN_ALLOW_THREADS
- sts = (*f->f_close)(f->f_fp);
- Py_END_ALLOW_THREADS
- if (sts == EOF)
-#ifdef HAVE_STRERROR
- PySys_WriteStderr("close failed: [Errno %d] %s\n", errno, strerror(errno));
-#else
- PySys_WriteStderr("close failed: [Errno %d]\n", errno);
-#endif
- }
- PyMem_Free(f->f_setbuf);
- Py_XDECREF(f->f_name);
- Py_XDECREF(f->f_mode);
- Py_XDECREF(f->f_encoding);
- drop_readahead(f);
- f->ob_type->tp_free((PyObject *)f);
-}
-
-static PyObject *
-file_repr(PyFileObject *f)
-{
- if (PyUnicode_Check(f->f_name)) {
- PyObject *ret = NULL;
- PyObject *name = PyUnicode_AsUnicodeEscapeString(f->f_name);
- const char *name_str = name ? PyString_AsString(name) : "?";
- ret = PyUnicode_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;
- } else {
- return PyUnicode_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)
-{
- int sts = 0;
- if (f->f_fp != NULL) {
- if (f->f_close != NULL) {
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- sts = (*f->f_close)(f->f_fp);
- Py_END_ALLOW_THREADS
- }
- f->f_fp = NULL;
- }
- PyMem_Free(f->f_setbuf);
- f->f_setbuf = NULL;
- if (sts == EOF)
- return PyErr_SetFromErrno(PyExc_IOError);
- if (sts != 0)
- return PyInt_FromLong((long)sts);
- Py_INCREF(Py_None);
- return Py_None;
-}
-
-
-/* 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_Warn(PyExc_DeprecationWarning,
- "integer argument expected, got float"))
- 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;
-
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- ret = _portable_fseek(f->f_fp, offset, whence);
- Py_END_ALLOW_THREADS
-
- 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.
- */
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- initialpos = _portable_ftell(f->f_fp);
- Py_END_ALLOW_THREADS
- 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.
- */
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- ret = fflush(f->f_fp);
- Py_END_ALLOW_THREADS
- 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. */
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- ret = _portable_fseek(f->f_fp, newsize, SEEK_SET) != 0;
- Py_END_ALLOW_THREADS
- if (ret)
- goto onioerror;
-
- /* Truncate. Note that this may grow the file! */
- Py_BEGIN_ALLOW_THREADS
- 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;
- }
- Py_END_ALLOW_THREADS
- if (ret)
- goto onioerror;
- }
-#else
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- ret = ftruncate(fileno(f->f_fp), newsize);
- Py_END_ALLOW_THREADS
- if (ret != 0)
- goto onioerror;
-#endif /* !MS_WINDOWS */
-
- /* Restore original file position. */
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- ret = _portable_fseek(f->f_fp, initialpos, SEEK_SET) != 0;
- Py_END_ALLOW_THREADS
- 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();
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- pos = _portable_ftell(f->f_fp);
- Py_END_ALLOW_THREADS
- 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') {
- 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();
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- res = fflush(f->f_fp);
- Py_END_ALLOW_THREADS
- 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();
- Py_BEGIN_ALLOW_THREADS
- res = isatty((int)fileno(f->f_fp));
- Py_END_ALLOW_THREADS
- 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 (;;) {
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- chunksize = Py_UniversalNewlineFread(BUF(v) + bytesread,
- buffersize - bytesread, f->f_fp, (PyObject *)f);
- Py_END_ALLOW_THREADS
- 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;
-
- if (f->f_fp == NULL)
- return err_closed();
- if (!f->f_binary) {
- PyErr_SetString(PyExc_TypeError,
- "readinto() requires binary mode");
- return NULL;
- }
- /* 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#", &ptr, &ntodo))
- return NULL;
- ndone = 0;
- while (ntodo > 0) {
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- nnow = Py_UniversalNewlineFread(ptr+ndone, ntodo, f->f_fp,
- (PyObject *)f);
- Py_END_ALLOW_THREADS
- if (nnow == 0) {
- if (!ferror(f->f_fp))
- break;
- PyErr_SetFromErrno(PyExc_IOError);
- clearerr(f->f_fp);
- return NULL;
- }
- ndone += nnow;
- ntodo -= nnow;
- }
- 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
+#define FUNLOCKFILE(f)
#endif
-#ifdef USE_FGETS_IN_GETLINE
-static PyObject*
-getline_via_fgets(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 (;;) {
- Py_BEGIN_ALLOW_THREADS
- 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);
- Py_END_ALLOW_THREADS
-
- 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 (;;) {
- Py_BEGIN_ALLOW_THREADS
- pvend = BUF(v) + total_v_size;
- nfree = pvend - pvfree;
- memset(pvfree, '\n', nfree);
- assert(nfree < INT_MAX);
- p = fgets(pvfree, (int)nfree, fp);
- Py_END_ALLOW_THREADS
+/* Newline flags */
+#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 */
- 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 */
+#ifdef __cplusplus
+extern "C" {
+#endif
-/* Internal routine to get a line.
- Size argument interpretation:
- > 0: max length;
- <= 0: read arbitrary line
-*/
+/* External C interface */
-static PyObject *
-get_line(PyFileObject *f, int n)
+PyObject *
+PyFile_FromFile(FILE *fp, char *name, char *mode, int (*close)(FILE *))
{
- 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;
+ PyObject *io, *stream, *nameobj;
-#if defined(USE_FGETS_IN_GETLINE)
- if (n <= 0 && !univ_newline )
- return getline_via_fgets(fp);
-#endif
- total_v_size = n > 0 ? n : 100;
- v = PyString_FromStringAndSize((char *)NULL, total_v_size);
- if (v == NULL)
+ io = PyImport_ImportModule("io");
+ if (io == NULL)
return NULL;
- buf = BUF(v);
- end = buf + total_v_size;
-
- for (;;) {
- Py_BEGIN_ALLOW_THREADS
- 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);
- Py_END_ALLOW_THREADS
- 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;
+ stream = PyObject_CallMethod(io, "open", "is", fileno(fp), mode);
+ Py_DECREF(io);
+ if (stream == NULL)
+ return NULL;
+ nameobj = PyUnicode_FromString(name);
+ if (nameobj == NULL)
+ PyErr_Clear();
+ else {
+ if (PyObject_SetAttrString(stream, "name", nameobj) < 0)
+ PyErr_Clear();
+ Py_DECREF(nameobj);
}
-
- used_v_size = buf - BUF(v);
- if (used_v_size != total_v_size)
- _PyString_Resize(&v, used_v_size);
- return v;
+ return stream;
}
-/* External C interface */
-
PyObject *
PyFile_GetLine(PyObject *f, int n)
{
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;
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;
- 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 {
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- nread = Py_UniversalNewlineFread(buffer+nfilled,
- buffersize-nfilled, f->f_fp, (PyObject *)f);
- Py_END_ALLOW_THREADS
- shortread = (nread < buffersize-nfilled);
- }
- if (nread == 0) {
- sizehint = 0;
- if (!ferror(f->f_fp))
- break;
- PyErr_SetFromErrno(PyExc_IOError);
- clearerr(f->f_fp);
- error:
- Py_DECREF(list);
- list = NULL;
- goto cleanup;
- }
- 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;
-}
-
-static PyObject *
-file_write(PyFileObject *f, PyObject *args)
-{
- char *s;
- Py_ssize_t n, n2;
- if (f->f_fp == NULL)
- return err_closed();
- if (!PyArg_ParseTuple(args, f->f_binary ? "s#" : "t#", &s, &n))
- return NULL;
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- n2 = fwrite(s, 1, n, f->f_fp);
- Py_END_ALLOW_THREADS
- 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. */
- Py_BEGIN_ALLOW_THREADS
- 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) {
- Py_BLOCK_THREADS
- PyErr_SetFromErrno(PyExc_IOError);
- clearerr(f->f_fp);
- goto error;
- }
- }
- Py_END_ALLOW_THREADS
-
- 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_exit(PyFileObject *f, PyObject *args)
-{
- PyObject *ret = file_close(f);
- 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(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},
- {"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"},
- /* 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 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"},
- {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;
- }
- Py_BEGIN_ALLOW_THREADS
- errno = 0;
- chunksize = Py_UniversalNewlineFread(
- f->f_buf, bufsize, f->f_fp, (PyObject *)f);
- Py_END_ALLOW_THREADS
- 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;
-
- PyErr_SetString(PyExc_SystemError, "attempt to create old file");
- return NULL;
-
- assert(type != NULL && type->tp_alloc != NULL);
-
- if (not_yet_string == NULL) {
- not_yet_string = PyString_FromString("<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;
- ((PyFileObject *)self)->weakreflist = NULL;
- }
- 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.\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 = {
- PyObject_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 */
- 0, /* tp_setattro */
- 0, /* tp_as_buffer */
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* 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 */
-};
-
/* Interfaces to write objects/strings to file-like objects */
int
PyErr_SetString(PyExc_TypeError, "writeobject with NULL file");
return -1;
}
- else if (PyFile_Check(f)) {
- FILE *fp = PyFile_AsFile(f);
- PyObject *enc = ((PyFileObject*)f)->f_encoding;
- int result;
- if (fp == NULL) {
- err_closed();
- return -1;
- }
- if ((flags & Py_PRINT_RAW) &&
- PyUnicode_Check(v) && enc != Py_None) {
- char *cenc = PyString_AS_STRING(enc);
- value = PyUnicode_AsEncodedString(v, cenc, "strict");
- if (value == NULL)
- return -1;
- } else {
- value = v;
- Py_INCREF(value);
- }
- result = PyObject_Print(value, fp, flags);
- Py_DECREF(value);
- return result;
- }
writer = PyObject_GetAttrString(f, "write");
if (writer == NULL)
return -1;
"null file for PyFile_WriteString");
return -1;
}
- else if (PyFile_Check(f)) {
- FILE *fp = PyFile_AsFile(f);
- if (fp == NULL) {
- err_closed();
- return -1;
- }
- fputs(s, fp);
- return 0;
- }
else if (!PyErr_Occurred()) {
PyObject *v = PyString_FromString(s);
int err;
-1 is returned on failure.
*/
-int PyObject_AsFileDescriptor(PyObject *o)
+int
+PyObject_AsFileDescriptor(PyObject *o)
{
int fd;
PyObject *meth;
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.
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;
+ errno = ENXIO; /* What can you do... */
+ return NULL;
}
FLOCKFILE(stream);
c = 'x'; /* Shut up gcc warning */
newlinetypes |= NEWLINE_CR;
FUNLOCKFILE(stream);
*p = '\0';
- if (fobj) {
- ((PyFileObject *)fobj)->f_newlinetypes = newlinetypes;
- ((PyFileObject *)fobj)->f_skipnextlf = skipnextlf;
- } else if ( skipnextlf ) {
+ 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
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
projects / python / commitdiff