| |
| /* File object implementation */ |
| |
| #include "Python.h" |
| #include "structmember.h" |
| |
| #ifndef DONT_HAVE_SYS_TYPES_H |
| #include <sys/types.h> |
| #endif /* DONT_HAVE_SYS_TYPES_H */ |
| |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif |
| |
| #ifdef MS_WIN32 |
| #define fileno _fileno |
| /* can (almost fully) duplicate with _chsize, see file_truncate */ |
| #define HAVE_FTRUNCATE |
| #endif |
| |
| #ifdef macintosh |
| #ifdef USE_GUSI |
| #define HAVE_FTRUNCATE |
| #endif |
| #endif |
| |
| #ifdef __MWERKS__ |
| /* Mwerks fopen() doesn't always set errno */ |
| #define NO_FOPEN_ERRNO |
| #endif |
| |
| #define BUF(v) PyString_AS_STRING((PyStringObject *)v) |
| |
| #ifndef DONT_HAVE_ERRNO_H |
| #include <errno.h> |
| #endif |
| |
| |
| typedef struct { |
| PyObject_HEAD |
| FILE *f_fp; |
| PyObject *f_name; |
| PyObject *f_mode; |
| int (*f_close)(FILE *); |
| int f_softspace; /* Flag used by 'print' command */ |
| int f_binary; /* Flag which indicates whether the file is open |
| open in binary (1) or test (0) mode */ |
| } PyFileObject; |
| |
| 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; |
| } |
| |
| PyObject * |
| PyFile_FromFile(FILE *fp, char *name, char *mode, int (*close)(FILE *)) |
| { |
| PyFileObject *f = PyObject_NEW(PyFileObject, &PyFile_Type); |
| if (f == NULL) |
| return NULL; |
| f->f_fp = NULL; |
| f->f_name = PyString_FromString(name); |
| f->f_mode = PyString_FromString(mode); |
| f->f_close = close; |
| f->f_softspace = 0; |
| if (strchr(mode,'b') != NULL) |
| f->f_binary = 1; |
| else |
| f->f_binary = 0; |
| if (f->f_name == NULL || f->f_mode == NULL) { |
| Py_DECREF(f); |
| return NULL; |
| } |
| f->f_fp = fp; |
| 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) |
| return NULL; |
| #ifdef HAVE_FOPENRF |
| if (*mode == '*') { |
| FILE *fopenRF(); |
| f->f_fp = fopenRF(name, mode+1); |
| } |
| else |
| #endif |
| { |
| Py_BEGIN_ALLOW_THREADS |
| f->f_fp = fopen(name, mode); |
| Py_END_ALLOW_THREADS |
| } |
| if (f->f_fp == NULL) { |
| #ifdef NO_FOPEN_ERRNO |
| /* Metroworks only, not testable, so unchanged */ |
| if ( errno == 0 ) { |
| PyErr_SetString(PyExc_IOError, "Cannot open file"); |
| Py_DECREF(f); |
| return NULL; |
| } |
| #endif |
| PyErr_SetFromErrnoWithFilename(PyExc_IOError, name); |
| Py_DECREF(f); |
| return NULL; |
| } |
| return (PyObject *)f; |
| } |
| |
| void |
| PyFile_SetBufSize(PyObject *f, int bufsize) |
| { |
| if (bufsize >= 0) { |
| #ifdef HAVE_SETVBUF |
| int type; |
| switch (bufsize) { |
| case 0: |
| type = _IONBF; |
| break; |
| case 1: |
| type = _IOLBF; |
| bufsize = BUFSIZ; |
| break; |
| default: |
| type = _IOFBF; |
| } |
| setvbuf(((PyFileObject *)f)->f_fp, (char *)NULL, |
| type, bufsize); |
| #else /* !HAVE_SETVBUF */ |
| if (bufsize <= 1) |
| setbuf(((PyFileObject *)f)->f_fp, (char *)NULL); |
| #endif /* !HAVE_SETVBUF */ |
| } |
| } |
| |
| static PyObject * |
| err_closed(void) |
| { |
| PyErr_SetString(PyExc_ValueError, "I/O operation on closed file"); |
| return NULL; |
| } |
| |
| /* Methods */ |
| |
| static void |
| file_dealloc(PyFileObject *f) |
| { |
| if (f->f_fp != NULL && f->f_close != NULL) { |
| Py_BEGIN_ALLOW_THREADS |
| (*f->f_close)(f->f_fp); |
| Py_END_ALLOW_THREADS |
| } |
| if (f->f_name != NULL) { |
| Py_DECREF(f->f_name); |
| } |
| if (f->f_mode != NULL) { |
| Py_DECREF(f->f_mode); |
| } |
| PyObject_DEL(f); |
| } |
| |
| static PyObject * |
| file_repr(PyFileObject *f) |
| { |
| char buf[300]; |
| sprintf(buf, "<%s file '%.256s', mode '%.10s' at %p>", |
| f->f_fp == NULL ? "closed" : "open", |
| PyString_AsString(f->f_name), |
| PyString_AsString(f->f_mode), |
| f); |
| return PyString_FromString(buf); |
| } |
| |
| static PyObject * |
| file_close(PyFileObject *f, PyObject *args) |
| { |
| int sts = 0; |
| if (!PyArg_NoArgs(args)) |
| return NULL; |
| 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; |
| } |
| if (sts == EOF) |
| return PyErr_SetFromErrno(PyExc_IOError); |
| if (sts != 0) |
| return PyInt_FromLong((long)sts); |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| |
| /* An 8-byte off_t-like type */ |
| #if defined(HAVE_LARGEFILE_SUPPORT) && SIZEOF_OFF_T < 8 && SIZEOF_FPOS_T >= 8 |
| typedef fpos_t Py_off_t; |
| #else |
| typedef off_t Py_off_t; |
| #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_FSEEKO) |
| return fseeko(fp, offset, whence); |
| #elif defined(HAVE_FSEEK64) |
| return fseek64(fp, offset, whence); |
| #elif defined(__BEOS__) |
| return _fseek(fp, offset, whence); |
| #elif defined(HAVE_LARGEFILE_SUPPORT) && 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: |
| if (fseek(fp, 0, SEEK_END) != 0) |
| return -1; |
| /* fall through */ |
| case SEEK_CUR: |
| if (fgetpos(fp, &pos) != 0) |
| return -1; |
| offset += pos; |
| break; |
| /* case SEEK_SET: break; */ |
| } |
| return fsetpos(fp, &offset); |
| #else |
| return fseek(fp, offset, whence); |
| #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 SIZEOF_FPOS_T >= 8 && defined(HAVE_LARGEFILE_SUPPORT) |
| fpos_t pos; |
| if (fgetpos(fp, &pos) != 0) |
| return -1; |
| return pos; |
| #elif defined(HAVE_FTELLO) && defined(HAVE_LARGEFILE_SUPPORT) |
| return ftello(fp); |
| #elif defined(HAVE_FTELL64) && defined(HAVE_LARGEFILE_SUPPORT) |
| return ftell64(fp); |
| #else |
| return ftell(fp); |
| #endif |
| } |
| |
| |
| static PyObject * |
| file_seek(PyFileObject *f, PyObject *args) |
| { |
| int whence; |
| int ret; |
| Py_off_t offset; |
| PyObject *offobj; |
| |
| if (f->f_fp == NULL) |
| return err_closed(); |
| whence = 0; |
| if (!PyArg_ParseTuple(args, "O|i:seek", &offobj, &whence)) |
| return NULL; |
| #if !defined(HAVE_LARGEFILE_SUPPORT) |
| offset = PyInt_AsLong(offobj); |
| #else |
| offset = PyLong_Check(offobj) ? |
| PyLong_AsLongLong(offobj) : PyInt_AsLong(offobj); |
| #endif |
| 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; |
| } |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| |
| #ifdef HAVE_FTRUNCATE |
| static PyObject * |
| file_truncate(PyFileObject *f, PyObject *args) |
| { |
| int ret; |
| Py_off_t newsize; |
| PyObject *newsizeobj; |
| |
| if (f->f_fp == NULL) |
| return err_closed(); |
| newsizeobj = NULL; |
| if (!PyArg_ParseTuple(args, "|O:truncate", &newsizeobj)) |
| return NULL; |
| 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*/ |
| Py_BEGIN_ALLOW_THREADS |
| errno = 0; |
| newsize = _portable_ftell(f->f_fp); |
| Py_END_ALLOW_THREADS |
| if (newsize == -1) { |
| PyErr_SetFromErrno(PyExc_IOError); |
| clearerr(f->f_fp); |
| return NULL; |
| } |
| } |
| Py_BEGIN_ALLOW_THREADS |
| errno = 0; |
| ret = fflush(f->f_fp); |
| Py_END_ALLOW_THREADS |
| if (ret != 0) goto onioerror; |
| |
| #ifdef MS_WIN32 |
| /* can use _chsize; if, however, the newsize overflows 32-bits then |
| _chsize is *not* adequate; in this case, an OverflowError is raised */ |
| if (newsize > LONG_MAX) { |
| PyErr_SetString(PyExc_OverflowError, |
| "the new size is too long for _chsize (it is limited to 32-bit values)"); |
| return NULL; |
| } else { |
| Py_BEGIN_ALLOW_THREADS |
| errno = 0; |
| ret = _chsize(fileno(f->f_fp), newsize); |
| Py_END_ALLOW_THREADS |
| if (ret != 0) 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_WIN32 */ |
| |
| 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, PyObject *args) |
| { |
| Py_off_t pos; |
| |
| if (f->f_fp == NULL) |
| return err_closed(); |
| if (!PyArg_NoArgs(args)) |
| return NULL; |
| 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 !defined(HAVE_LARGEFILE_SUPPORT) |
| return PyInt_FromLong(pos); |
| #else |
| return PyLong_FromLongLong(pos); |
| #endif |
| } |
| |
| static PyObject * |
| file_fileno(PyFileObject *f, PyObject *args) |
| { |
| if (f->f_fp == NULL) |
| return err_closed(); |
| if (!PyArg_NoArgs(args)) |
| return NULL; |
| return PyInt_FromLong((long) fileno(f->f_fp)); |
| } |
| |
| static PyObject * |
| file_flush(PyFileObject *f, PyObject *args) |
| { |
| int res; |
| |
| if (f->f_fp == NULL) |
| return err_closed(); |
| if (!PyArg_NoArgs(args)) |
| return NULL; |
| 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, PyObject *args) |
| { |
| long res; |
| if (f->f_fp == NULL) |
| return err_closed(); |
| if (!PyArg_NoArgs(args)) |
| return NULL; |
| Py_BEGIN_ALLOW_THREADS |
| res = isatty((int)fileno(f->f_fp)); |
| Py_END_ALLOW_THREADS |
| return PyInt_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 |
| long 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; |
| } |
| |
| 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(); |
| if (!PyArg_ParseTuple(args, "|l:read", &bytesrequested)) |
| return NULL; |
| if (bytesrequested < 0) |
| buffersize = new_buffersize(f, (size_t)0); |
| else |
| buffersize = bytesrequested; |
| if (buffersize > INT_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 = fread(BUF(v) + bytesread, 1, |
| buffersize - bytesread, f->f_fp); |
| Py_END_ALLOW_THREADS |
| if (chunksize == 0) { |
| if (!ferror(f->f_fp)) |
| break; |
| PyErr_SetFromErrno(PyExc_IOError); |
| clearerr(f->f_fp); |
| Py_DECREF(v); |
| return NULL; |
| } |
| bytesread += chunksize; |
| if (bytesread < buffersize) |
| break; |
| if (bytesrequested < 0) { |
| buffersize = new_buffersize(f, buffersize); |
| if (_PyString_Resize(&v, buffersize) < 0) |
| return NULL; |
| } |
| } |
| if (bytesread != buffersize) |
| _PyString_Resize(&v, bytesread); |
| return v; |
| } |
| |
| static PyObject * |
| file_readinto(PyFileObject *f, PyObject *args) |
| { |
| char *ptr; |
| size_t ntodo, ndone, nnow; |
| |
| if (f->f_fp == NULL) |
| return err_closed(); |
| if (!PyArg_Parse(args, "w#", &ptr, &ntodo)) |
| return NULL; |
| ndone = 0; |
| while (ntodo > 0) { |
| Py_BEGIN_ALLOW_THREADS |
| errno = 0; |
| nnow = fread(ptr+ndone, 1, ntodo, f->f_fp); |
| 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_FromLong((long)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(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. |
| * INCBUFSIZE is the amount by which we grow the buffer, if MAXBUFSIZE isn't |
| * enough. It doesn't much matter what this is set to: we only get here for |
| * absurdly long lines anyway. |
| */ |
| #define INITBUFSIZE 100 |
| #define MAXBUFSIZE 300 |
| #define INCBUFSIZE 1000 |
| 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 */ |
| |
| /* 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); |
| p = fgets(pvfree, 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 + INCBUFSIZE; |
| 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); |
| p = fgets(pvfree, nfree, fp); |
| Py_END_ALLOW_THREADS |
| |
| 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'); |
| total_v_size += INCBUFSIZE; |
| if (total_v_size > INT_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) + (total_v_size - INCBUFSIZE - 1); |
| } |
| if (BUF(v) + total_v_size != p) |
| _PyString_Resize(&v, p - BUF(v)); |
| return v; |
| #undef INITBUFSIZE |
| #undef MAXBUFSIZE |
| #undef INCBUFSIZE |
| } |
| #endif /* ifdef USE_FGETS_IN_GETLINE */ |
| |
| /* Internal routine to get a line. |
| Size argument interpretation: |
| > 0: max length; |
| <= 0: read arbitrary line |
| */ |
| |
| #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 |
| |
| static PyObject * |
| get_line(PyFileObject *f, int n) |
| { |
| FILE *fp = f->f_fp; |
| int c; |
| char *buf, *end; |
| size_t n1, n2; |
| PyObject *v; |
| |
| #ifdef USE_FGETS_IN_GETLINE |
| if (n <= 0) |
| return getline_via_fgets(fp); |
| #endif |
| n2 = n > 0 ? n : 100; |
| v = PyString_FromStringAndSize((char *)NULL, n2); |
| if (v == NULL) |
| return NULL; |
| buf = BUF(v); |
| end = buf + n2; |
| |
| for (;;) { |
| Py_BEGIN_ALLOW_THREADS |
| FLOCKFILE(fp); |
| while ((c = GETC(fp)) != EOF && |
| (*buf++ = c) != '\n' && |
| buf != end) |
| ; |
| FUNLOCKFILE(fp); |
| Py_END_ALLOW_THREADS |
| if (c == '\n') |
| break; |
| if (c == EOF) { |
| clearerr(fp); |
| if (PyErr_CheckSignals()) { |
| Py_DECREF(v); |
| return NULL; |
| } |
| break; |
| } |
| /* Must be because buf == end */ |
| if (n > 0) |
| break; |
| n1 = n2; |
| n2 += 1000; |
| if (n2 > INT_MAX) { |
| PyErr_SetString(PyExc_OverflowError, |
| "line is longer than a Python string can hold"); |
| Py_DECREF(v); |
| return NULL; |
| } |
| if (_PyString_Resize(&v, n2) < 0) |
| return NULL; |
| buf = BUF(v) + n1; |
| end = BUF(v) + n2; |
| } |
| |
| n1 = buf - BUF(v); |
| if (n1 != n2) |
| _PyString_Resize(&v, n1); |
| 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)) { |
| if (((PyFileObject*)f)->f_fp == NULL) |
| return err_closed(); |
| result = get_line((PyFileObject *)f, n); |
| } |
| else { |
| PyObject *reader; |
| PyObject *args; |
| |
| reader = PyObject_GetAttrString(f, "readline"); |
| if (reader == NULL) |
| return NULL; |
| if (n <= 0) |
| args = Py_BuildValue("()"); |
| 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)) { |
| 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); |
| int 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; |
| } |
| } |
| } |
| return result; |
| } |
| |
| /* Python method */ |
| |
| static PyObject * |
| file_readline(PyFileObject *f, PyObject *args) |
| { |
| int n = -1; |
| |
| if (f->f_fp == NULL) |
| return err_closed(); |
| 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_xreadlines(PyFileObject *f, PyObject *args) |
| { |
| static PyObject* xreadlines_function = NULL; |
| |
| if (!PyArg_ParseTuple(args, ":xreadlines")) |
| return NULL; |
| |
| if (!xreadlines_function) { |
| PyObject *xreadlines_module = |
| PyImport_ImportModule("xreadlines"); |
| if(!xreadlines_module) |
| return NULL; |
| |
| xreadlines_function = PyObject_GetAttrString(xreadlines_module, |
| "xreadlines"); |
| Py_DECREF(xreadlines_module); |
| if(!xreadlines_function) |
| return NULL; |
| } |
| return PyObject_CallFunction(xreadlines_function, "(O)", f); |
| } |
| |
| 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; |
| |
| if (f->f_fp == NULL) |
| return err_closed(); |
| if (!PyArg_ParseTuple(args, "|l:readlines", &sizehint)) |
| return NULL; |
| if ((list = PyList_New(0)) == NULL) |
| return NULL; |
| for (;;) { |
| Py_BEGIN_ALLOW_THREADS |
| errno = 0; |
| nread = fread(buffer+nfilled, 1, buffersize-nfilled, f->f_fp); |
| Py_END_ALLOW_THREADS |
| 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 = memchr(buffer+nfilled, '\n', nread); |
| if (p == NULL) { |
| /* Need a larger buffer to fit this line */ |
| nfilled += nread; |
| buffersize *= 2; |
| if (buffersize > INT_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 */ |
| _PyString_Resize(&big_buffer, buffersize); |
| 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 = 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: |
| if (big_buffer) { |
| Py_DECREF(big_buffer); |
| } |
| return list; |
| } |
| |
| static PyObject * |
| file_write(PyFileObject *f, PyObject *args) |
| { |
| char *s; |
| int n, n2; |
| if (f->f_fp == NULL) |
| return err_closed(); |
| if (!PyArg_Parse(args, f->f_binary ? "s#" : "t#", &s, &n)) |
| return NULL; |
| f->f_softspace = 0; |
| 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 *args) |
| { |
| #define CHUNKSIZE 1000 |
| PyObject *list, *line; |
| PyObject *result; |
| int i, j, index, len, nwritten, islist; |
| |
| if (f->f_fp == NULL) |
| return err_closed(); |
| if (args == NULL || !PySequence_Check(args)) { |
| PyErr_SetString(PyExc_TypeError, |
| "writelines() argument must be a sequence of strings"); |
| return NULL; |
| } |
| islist = PyList_Check(args); |
| |
| /* 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. */ |
| index = 0; |
| if (islist) |
| list = NULL; |
| else { |
| list = PyList_New(CHUNKSIZE); |
| if (list == NULL) |
| return NULL; |
| } |
| result = NULL; |
| |
| for (;;) { |
| if (islist) { |
| Py_XDECREF(list); |
| list = PyList_GetSlice(args, index, index+CHUNKSIZE); |
| if (list == NULL) |
| return NULL; |
| j = PyList_GET_SIZE(list); |
| } |
| else { |
| for (j = 0; j < CHUNKSIZE; j++) { |
| line = PySequence_GetItem(args, index+j); |
| if (line == NULL) { |
| if (PyErr_ExceptionMatches( |
| PyExc_IndexError)) { |
| PyErr_Clear(); |
| break; |
| } |
| /* Some other error occurred. |
| XXX We may lose some output. */ |
| goto error; |
| } |
| 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; |
| int len; |
| 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 |
| f->f_softspace = 0; |
| 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; |
| index += CHUNKSIZE; |
| } |
| |
| Py_INCREF(Py_None); |
| result = Py_None; |
| error: |
| Py_XDECREF(list); |
| return result; |
| } |
| |
| static PyMethodDef file_methods[] = { |
| {"readline", (PyCFunction)file_readline, 1}, |
| {"read", (PyCFunction)file_read, 1}, |
| {"write", (PyCFunction)file_write, 0}, |
| {"fileno", (PyCFunction)file_fileno, 0}, |
| {"seek", (PyCFunction)file_seek, 1}, |
| #ifdef HAVE_FTRUNCATE |
| {"truncate", (PyCFunction)file_truncate, 1}, |
| #endif |
| {"tell", (PyCFunction)file_tell, 0}, |
| {"readinto", (PyCFunction)file_readinto, 0}, |
| {"readlines", (PyCFunction)file_readlines, 1}, |
| {"xreadlines", (PyCFunction)file_xreadlines, 1}, |
| {"writelines", (PyCFunction)file_writelines, 0}, |
| {"flush", (PyCFunction)file_flush, 0}, |
| {"close", (PyCFunction)file_close, 0}, |
| {"isatty", (PyCFunction)file_isatty, 0}, |
| {NULL, NULL} /* sentinel */ |
| }; |
| |
| #define OFF(x) offsetof(PyFileObject, x) |
| |
| static struct memberlist file_memberlist[] = { |
| {"softspace", T_INT, OFF(f_softspace)}, |
| {"mode", T_OBJECT, OFF(f_mode), RO}, |
| {"name", T_OBJECT, OFF(f_name), RO}, |
| /* getattr(f, "closed") is implemented without this table */ |
| {"closed", T_INT, 0, RO}, |
| {NULL} /* Sentinel */ |
| }; |
| |
| static PyObject * |
| file_getattr(PyFileObject *f, char *name) |
| { |
| PyObject *res; |
| |
| res = Py_FindMethod(file_methods, (PyObject *)f, name); |
| if (res != NULL) |
| return res; |
| PyErr_Clear(); |
| if (strcmp(name, "closed") == 0) |
| return PyInt_FromLong((long)(f->f_fp == 0)); |
| return PyMember_Get((char *)f, file_memberlist, name); |
| } |
| |
| static int |
| file_setattr(PyFileObject *f, char *name, PyObject *v) |
| { |
| if (v == NULL) { |
| PyErr_SetString(PyExc_AttributeError, |
| "can't delete file attributes"); |
| return -1; |
| } |
| return PyMember_Set((char *)f, file_memberlist, name, v); |
| } |
| |
| static PyObject * |
| file_getiter(PyFileObject *f) |
| { |
| static PyObject *es; |
| PyObject *iter; |
| PyObject *rl = Py_FindMethod(file_methods, (PyObject *)f, "readline"); |
| if (rl == NULL) |
| return NULL; |
| if (es == NULL) |
| es = PyString_FromString(""); |
| iter = PyCallIter_New(rl, es); |
| Py_DECREF(rl); |
| return iter; |
| } |
| |
| PyTypeObject PyFile_Type = { |
| PyObject_HEAD_INIT(&PyType_Type) |
| 0, |
| "file", |
| sizeof(PyFileObject), |
| 0, |
| (destructor)file_dealloc, /* tp_dealloc */ |
| 0, /* tp_print */ |
| (getattrfunc)file_getattr, /* tp_getattr */ |
| (setattrfunc)file_setattr, /* 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 */ |
| 0, /* tp_getattro */ |
| 0, /* tp_setattro */ |
| 0, /* tp_as_buffer */ |
| Py_TPFLAGS_DEFAULT, /* tp_flags */ |
| 0, /* tp_doc */ |
| 0, /* tp_traverse */ |
| 0, /* tp_clear */ |
| 0, /* tp_richcompare */ |
| 0, /* tp_weaklistoffset */ |
| (getiterfunc)file_getiter, /* tp_iter */ |
| 0, /* tp_iternext */ |
| }; |
| |
| /* Interface for the 'soft space' between print items. */ |
| |
| int |
| PyFile_SoftSpace(PyObject *f, int newflag) |
| { |
| int 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); |
| 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 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)) { |
| FILE *fp = PyFile_AsFile(f); |
| if (fp == NULL) { |
| err_closed(); |
| return -1; |
| } |
| return PyObject_Print(v, fp, flags); |
| } |
| writer = PyObject_GetAttrString(f, "write"); |
| if (writer == NULL) |
| return -1; |
| if (flags & Py_PRINT_RAW) |
| value = PyObject_Str(v); |
| else |
| value = PyObject_Repr(v); |
| if (value == NULL) { |
| Py_DECREF(writer); |
| return -1; |
| } |
| args = Py_BuildValue("(O)", 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(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)) { |
| 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; |
| 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; |
| } |