-/* Copyright (C) 1993,95,97,98,99,2000,2001 Free Software Foundation, Inc.
+/* Copyright (C) 1993-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Written by Ulrich Drepper <drepper@cygnus.com>.
Based on the single byte version by Per Bothner <bothner@cygnus.com>.
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA.
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>.
As a special exception, if you link the code in this file with
files compiled with a GNU compiler to produce an executable,
#include <stdlib.h>
#include <string.h>
-
-#ifndef _LIBC
-# define _IO_new_do_write _IO_do_write
-# define _IO_new_file_attach _IO_file_attach
-# define _IO_new_file_close_it _IO_file_close_it
-# define _IO_new_file_finish _IO_file_finish
-# define _IO_new_file_fopen _IO_file_fopen
-# define _IO_new_file_init _IO_file_init
-# define _IO_new_file_setbuf _IO_file_setbuf
-# define _IO_new_file_sync _IO_file_sync
-# define _IO_new_file_overflow _IO_file_overflow
-# define _IO_new_file_seekoff _IO_file_seekoff
-# define _IO_new_file_underflow _IO_file_underflow
-# define _IO_new_file_write _IO_file_write
-# define _IO_new_file_xsputn _IO_file_xsputn
-#endif
-
-
-_IO_FILE *
-_IO_wfile_setbuf (fp, p, len)
- _IO_FILE *fp;
- wchar_t *p;
- _IO_ssize_t len;
-{
- if (_IO_wdefault_setbuf (fp, p, len) == NULL)
- return NULL;
-
- fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr =
- fp->_wide_data->_IO_write_end = fp->_wide_data->_IO_buf_base;
- _IO_wsetg (fp, fp->_wide_data->_IO_buf_base, fp->_wide_data->_IO_buf_base,
- fp->_wide_data->_IO_buf_base);
-
- return fp;
-}
-
-
/* Convert TO_DO wide character from DATA to FP.
Then mark FP as having empty buffers. */
int
-_IO_wdo_write (fp, data, to_do)
- _IO_FILE *fp;
- const wchar_t *data;
- _IO_size_t to_do;
+_IO_wdo_write (FILE *fp, const wchar_t *data, size_t to_do)
{
struct _IO_codecvt *cc = fp->_codecvt;
{
if (_IO_new_do_write (fp, fp->_IO_write_base,
fp->_IO_write_ptr - fp->_IO_write_base) == EOF)
- return EOF;
+ return WEOF;
}
do
{
enum __codecvt_result result;
const wchar_t *new_data;
+ char mb_buf[MB_LEN_MAX];
+ char *write_base, *write_ptr, *buf_end;
+
+ if (fp->_IO_write_ptr - fp->_IO_write_base < sizeof (mb_buf))
+ {
+ /* Make sure we have room for at least one multibyte
+ character. */
+ write_ptr = write_base = mb_buf;
+ buf_end = mb_buf + sizeof (mb_buf);
+ }
+ else
+ {
+ write_ptr = fp->_IO_write_ptr;
+ write_base = fp->_IO_write_base;
+ buf_end = fp->_IO_buf_end;
+ }
/* Now convert from the internal format into the external buffer. */
- result = (*cc->__codecvt_do_out) (cc, &fp->_wide_data->_IO_state,
- data, data + to_do, &new_data,
- fp->_IO_write_ptr,
- fp->_IO_buf_end,
- &fp->_IO_write_ptr);
+ result = __libio_codecvt_out (cc, &fp->_wide_data->_IO_state,
+ data, data + to_do, &new_data,
+ write_ptr,
+ buf_end,
+ &write_ptr);
/* Write out what we produced so far. */
- if (_IO_new_do_write (fp, fp->_IO_write_base,
- fp->_IO_write_ptr - fp->_IO_write_base) == EOF)
+ if (_IO_new_do_write (fp, write_base, write_ptr - write_base) == EOF)
/* Something went wrong. */
- return EOF;
+ return WEOF;
to_do -= new_data - data;
fp->_wide_data->_IO_buf_base);
fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr
= fp->_wide_data->_IO_buf_base;
- fp->_wide_data->_IO_write_end = ((fp->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED))
+ fp->_wide_data->_IO_write_end = ((fp->_flags & (_IO_LINE_BUF | _IO_UNBUFFERED))
? fp->_wide_data->_IO_buf_base
: fp->_wide_data->_IO_buf_end);
return to_do == 0 ? 0 : WEOF;
}
+libc_hidden_def (_IO_wdo_write)
wint_t
-_IO_wfile_underflow (fp)
- _IO_FILE *fp;
+_IO_wfile_underflow (FILE *fp)
{
struct _IO_codecvt *cd;
enum __codecvt_result status;
- _IO_ssize_t count;
- int tries;
- const char *read_ptr_copy;
+ ssize_t count;
- if (fp->_flags & _IO_NO_READS)
+ /* C99 requires EOF to be "sticky". */
+ if (fp->_flags & _IO_EOF_SEEN)
+ return WEOF;
+
+ if (__glibc_unlikely (fp->_flags & _IO_NO_READS))
{
fp->_flags |= _IO_ERR_SEEN;
__set_errno (EBADF);
const char *read_stop = (const char *) fp->_IO_read_ptr;
fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state;
- status = (*cd->__codecvt_do_in) (cd, &fp->_wide_data->_IO_state,
- fp->_IO_read_ptr, fp->_IO_read_end,
- &read_stop,
- fp->_wide_data->_IO_read_end,
- fp->_wide_data->_IO_buf_end,
- &fp->_wide_data->_IO_read_end);
+ fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr =
+ fp->_wide_data->_IO_buf_base;
+ status = __libio_codecvt_in (cd, &fp->_wide_data->_IO_state,
+ fp->_IO_read_ptr, fp->_IO_read_end,
+ &read_stop,
+ fp->_wide_data->_IO_read_ptr,
+ fp->_wide_data->_IO_buf_end,
+ &fp->_wide_data->_IO_read_end);
+ fp->_IO_read_base = fp->_IO_read_ptr;
fp->_IO_read_ptr = (char *) read_stop;
/* If we managed to generate some text return the next character. */
_IO_wdoallocbuf (fp);
}
- /* Flush all line buffered files before reading. */
/* FIXME This can/should be moved to genops ?? */
- if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED))
+ if (fp->_flags & (_IO_LINE_BUF | _IO_UNBUFFERED))
{
-#if 0
- _IO_flush_all_linebuffered ();
-#else
/* We used to flush all line-buffered stream. This really isn't
required by any standard. My recollection is that
traditional Unix systems did this for stdout. stderr better
not be line buffered. So we do just that here
explicitly. --drepper */
- _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile,
- _IO_stdout);
- _IO_flockfile (_IO_stdout);
+ _IO_acquire_lock (stdout);
- if ((_IO_stdout->_flags & (_IO_LINKED | _IO_NO_WRITES | _IO_LINE_BUF))
+ if ((stdout->_flags & (_IO_LINKED | _IO_NO_WRITES | _IO_LINE_BUF))
== (_IO_LINKED | _IO_LINE_BUF))
- _IO_OVERFLOW (_IO_stdout, EOF);
+ _IO_OVERFLOW (stdout, EOF);
- _IO_funlockfile (_IO_stdout);
- _IO_cleanup_region_end (0);
-#endif
+ _IO_release_lock (stdout);
}
_IO_switch_to_get_mode (fp);
fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr =
fp->_wide_data->_IO_write_end = fp->_wide_data->_IO_buf_base;
- tries = 0;
+ const char *read_ptr_copy;
+ char accbuf[MB_LEN_MAX];
+ size_t naccbuf = 0;
again:
count = _IO_SYSREAD (fp, fp->_IO_read_end,
fp->_IO_buf_end - fp->_IO_read_end);
if (count <= 0)
{
- if (count == 0 && tries == 0)
- fp->_flags |= _IO_EOF_SEEN;
+ if (count == 0 && naccbuf == 0)
+ {
+ fp->_flags |= _IO_EOF_SEEN;
+ fp->_offset = _IO_pos_BAD;
+ }
else
fp->_flags |= _IO_ERR_SEEN, count = 0;
}
fp->_IO_read_end += count;
if (count == 0)
{
- if (tries != 0)
+ if (naccbuf != 0)
/* There are some bytes in the external buffer but they don't
- convert to anything. */
+ convert to anything. */
__set_errno (EILSEQ);
return WEOF;
}
/* Now convert the read input. */
fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state;
fp->_IO_read_base = fp->_IO_read_ptr;
- status = (*cd->__codecvt_do_in) (cd, &fp->_wide_data->_IO_state,
- fp->_IO_read_ptr, fp->_IO_read_end,
- &read_ptr_copy,
- fp->_wide_data->_IO_read_end,
- fp->_wide_data->_IO_buf_end,
- &fp->_wide_data->_IO_read_end);
-
- fp->_IO_read_ptr = (char *) read_ptr_copy;
+ const char *from = fp->_IO_read_ptr;
+ const char *to = fp->_IO_read_end;
+ size_t to_copy = count;
+ if (__glibc_unlikely (naccbuf != 0))
+ {
+ to_copy = MIN (sizeof (accbuf) - naccbuf, count);
+ to = __mempcpy (&accbuf[naccbuf], from, to_copy);
+ naccbuf += to_copy;
+ from = accbuf;
+ }
+ status = __libio_codecvt_in (cd, &fp->_wide_data->_IO_state,
+ from, to, &read_ptr_copy,
+ fp->_wide_data->_IO_read_end,
+ fp->_wide_data->_IO_buf_end,
+ &fp->_wide_data->_IO_read_end);
+
+ if (__glibc_unlikely (naccbuf != 0))
+ fp->_IO_read_ptr += MAX (0, read_ptr_copy - &accbuf[naccbuf - to_copy]);
+ else
+ fp->_IO_read_ptr = (char *) read_ptr_copy;
if (fp->_wide_data->_IO_read_end == fp->_wide_data->_IO_buf_base)
{
- if (status == __codecvt_error || fp->_IO_read_end == fp->_IO_buf_end)
+ if (status == __codecvt_error)
{
+ out_eilseq:
__set_errno (EILSEQ);
fp->_flags |= _IO_ERR_SEEN;
return WEOF;
/* The read bytes make no complete character. Try reading again. */
assert (status == __codecvt_partial);
- ++tries;
+
+ if (naccbuf == 0)
+ {
+ if (fp->_IO_read_base < fp->_IO_read_ptr)
+ {
+ /* Partially used the buffer for some input data that
+ produces no output. */
+ size_t avail = fp->_IO_read_end - fp->_IO_read_ptr;
+ memmove (fp->_IO_read_base, fp->_IO_read_ptr, avail);
+ fp->_IO_read_ptr = fp->_IO_read_base;
+ fp->_IO_read_end -= avail;
+ goto again;
+ }
+ naccbuf = fp->_IO_read_end - fp->_IO_read_ptr;
+ if (naccbuf >= sizeof (accbuf))
+ goto out_eilseq;
+
+ memcpy (accbuf, fp->_IO_read_ptr, naccbuf);
+ }
+ else
+ {
+ size_t used = read_ptr_copy - accbuf;
+ if (used > 0)
+ {
+ memmove (accbuf, read_ptr_copy, naccbuf - used);
+ naccbuf -= used;
+ }
+
+ if (naccbuf == sizeof (accbuf))
+ goto out_eilseq;
+ }
+
+ fp->_IO_read_ptr = fp->_IO_read_end = fp->_IO_read_base;
+
goto again;
}
return *fp->_wide_data->_IO_read_ptr;
}
+libc_hidden_def (_IO_wfile_underflow)
+
+
+static wint_t
+_IO_wfile_underflow_mmap (FILE *fp)
+{
+ struct _IO_codecvt *cd;
+ const char *read_stop;
+
+ if (__glibc_unlikely (fp->_flags & _IO_NO_READS))
+ {
+ fp->_flags |= _IO_ERR_SEEN;
+ __set_errno (EBADF);
+ return WEOF;
+ }
+ if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
+ return *fp->_wide_data->_IO_read_ptr;
+
+ cd = fp->_codecvt;
+
+ /* Maybe there is something left in the external buffer. */
+ if (fp->_IO_read_ptr >= fp->_IO_read_end
+ /* No. But maybe the read buffer is not fully set up. */
+ && _IO_file_underflow_mmap (fp) == EOF)
+ /* Nothing available. _IO_file_underflow_mmap has set the EOF or error
+ flags as appropriate. */
+ return WEOF;
+
+ /* There is more in the external. Convert it. */
+ read_stop = (const char *) fp->_IO_read_ptr;
+
+ if (fp->_wide_data->_IO_buf_base == NULL)
+ {
+ /* Maybe we already have a push back pointer. */
+ if (fp->_wide_data->_IO_save_base != NULL)
+ {
+ free (fp->_wide_data->_IO_save_base);
+ fp->_flags &= ~_IO_IN_BACKUP;
+ }
+ _IO_wdoallocbuf (fp);
+ }
+
+ fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state;
+ fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr =
+ fp->_wide_data->_IO_buf_base;
+ __libio_codecvt_in (cd, &fp->_wide_data->_IO_state,
+ fp->_IO_read_ptr, fp->_IO_read_end,
+ &read_stop,
+ fp->_wide_data->_IO_read_ptr,
+ fp->_wide_data->_IO_buf_end,
+ &fp->_wide_data->_IO_read_end);
+
+ fp->_IO_read_ptr = (char *) read_stop;
+
+ /* If we managed to generate some text return the next character. */
+ if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
+ return *fp->_wide_data->_IO_read_ptr;
+
+ /* There is some garbage at the end of the file. */
+ __set_errno (EILSEQ);
+ fp->_flags |= _IO_ERR_SEEN;
+ return WEOF;
+}
+
+static wint_t
+_IO_wfile_underflow_maybe_mmap (FILE *fp)
+{
+ /* This is the first read attempt. Doing the underflow will choose mmap
+ or vanilla operations and then punt to the chosen underflow routine.
+ Then we can punt to ours. */
+ if (_IO_file_underflow_maybe_mmap (fp) == EOF)
+ return WEOF;
+
+ return _IO_WUNDERFLOW (fp);
+}
wint_t
-_IO_wfile_overflow (f, wch)
- _IO_FILE *f;
- wint_t wch;
+_IO_wfile_overflow (FILE *f, wint_t wch)
{
if (f->_flags & _IO_NO_WRITES) /* SET ERROR */
{
if (f->_wide_data->_IO_write_base == 0)
{
_IO_wdoallocbuf (f);
+ _IO_free_wbackup_area (f);
_IO_wsetg (f, f->_wide_data->_IO_buf_base,
f->_wide_data->_IO_buf_base, f->_wide_data->_IO_buf_base);
f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end;
f->_flags |= _IO_CURRENTLY_PUTTING;
- if (f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED))
+ if (f->_flags & (_IO_LINE_BUF | _IO_UNBUFFERED))
f->_wide_data->_IO_write_end = f->_wide_data->_IO_write_ptr;
}
if (wch == WEOF)
return _IO_do_flush (f);
if (f->_wide_data->_IO_write_ptr == f->_wide_data->_IO_buf_end)
/* Buffer is really full */
- if (_IO_do_flush (f) == WEOF)
+ if (_IO_do_flush (f) == EOF)
return WEOF;
*f->_wide_data->_IO_write_ptr++ = wch;
if ((f->_flags & _IO_UNBUFFERED)
|| ((f->_flags & _IO_LINE_BUF) && wch == L'\n'))
- if (_IO_do_flush (f) == WEOF)
+ if (_IO_do_flush (f) == EOF)
return WEOF;
return wch;
}
+libc_hidden_def (_IO_wfile_overflow)
wint_t
-_IO_wfile_sync (fp)
- _IO_FILE *fp;
+_IO_wfile_sync (FILE *fp)
{
- _IO_ssize_t delta;
+ ssize_t delta;
wint_t retval = 0;
/* char* ptr = cur_ptr(); */
/* We have to find out how many bytes we have to go back in the
external buffer. */
struct _IO_codecvt *cv = fp->_codecvt;
- _IO_off64_t new_pos;
+ off64_t new_pos;
- int clen = (*cv->__codecvt_do_encoding) (cv);
+ int clen = __libio_codecvt_encoding (cv);
if (clen > 0)
/* It is easy, a fixed number of input bytes are used for each
else
{
/* We have to find out the hard way how much to back off.
- To do this we determine how much input we needed to
- generate the wide characters up to the current reading
- position. */
+ To do this we determine how much input we needed to
+ generate the wide characters up to the current reading
+ position. */
int nread;
-
+ size_t wnread = (fp->_wide_data->_IO_read_ptr
+ - fp->_wide_data->_IO_read_base);
fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state;
- nread = (*cv->__codecvt_do_length) (cv, &fp->_wide_data->_IO_state,
- fp->_IO_read_base,
- fp->_IO_read_end, delta);
+ nread = __libio_codecvt_length (cv, &fp->_wide_data->_IO_state,
+ fp->_IO_read_base,
+ fp->_IO_read_end, wnread);
fp->_IO_read_ptr = fp->_IO_read_base + nread;
delta = -(fp->_IO_read_end - fp->_IO_read_base - nread);
}
new_pos = _IO_SYSSEEK (fp, delta, 1);
- if (new_pos != (_IO_off64_t) EOF)
+ if (new_pos != (off64_t) EOF)
{
fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_read_ptr;
fp->_IO_read_end = fp->_IO_read_ptr;
}
-#ifdef ESPIPE
else if (errno == ESPIPE)
; /* Ignore error from unseekable devices. */
-#endif
else
retval = WEOF;
}
/* setg(base(), ptr, ptr); */
return retval;
}
+libc_hidden_def (_IO_wfile_sync)
-_IO_off64_t
-_IO_wfile_seekoff (fp, offset, dir, mode)
- _IO_FILE *fp;
- _IO_off64_t offset;
- int dir;
- int mode;
+/* Adjust the internal buffer pointers to reflect the state in the external
+ buffer. The content between fp->_IO_read_base and fp->_IO_read_ptr is
+ assumed to be converted and available in the range
+ fp->_wide_data->_IO_read_base and fp->_wide_data->_IO_read_end.
+
+ Returns 0 on success and -1 on error with the _IO_ERR_SEEN flag set. */
+static int
+adjust_wide_data (FILE *fp, bool do_convert)
{
- _IO_off64_t result;
- _IO_off64_t delta, new_offset;
- long int count;
- /* POSIX.1 8.2.3.7 says that after a call the fflush() the file
- offset of the underlying file must be exact. */
- int must_be_exact = ((fp->_wide_data->_IO_read_base
- == fp->_wide_data->_IO_read_end)
- && (fp->_wide_data->_IO_write_base
- == fp->_wide_data->_IO_write_ptr));
+ struct _IO_codecvt *cv = fp->_codecvt;
- if (mode == 0)
+ int clen = __libio_codecvt_encoding (cv);
+
+ /* Take the easy way out for constant length encodings if we don't need to
+ convert. */
+ if (!do_convert && clen > 0)
+ {
+ fp->_wide_data->_IO_read_end += ((fp->_IO_read_ptr - fp->_IO_read_base)
+ / clen);
+ goto done;
+ }
+
+ enum __codecvt_result status;
+ const char *read_stop = (const char *) fp->_IO_read_base;
+ do
{
+
+ fp->_wide_data->_IO_last_state = fp->_wide_data->_IO_state;
+ status = __libio_codecvt_in (cv, &fp->_wide_data->_IO_state,
+ fp->_IO_read_base, fp->_IO_read_ptr,
+ &read_stop,
+ fp->_wide_data->_IO_read_base,
+ fp->_wide_data->_IO_buf_end,
+ &fp->_wide_data->_IO_read_end);
+
+ /* Should we return EILSEQ? */
+ if (__glibc_unlikely (status == __codecvt_error))
+ {
+ fp->_flags |= _IO_ERR_SEEN;
+ return -1;
+ }
+ }
+ while (__builtin_expect (status == __codecvt_partial, 0));
+
+done:
+ /* Now seek to _IO_read_end to behave as if we have read it all in. */
+ fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end;
+
+ return 0;
+}
+
+/* ftell{,o} implementation for wide mode. Don't modify any state of the file
+ pointer while we try to get the current state of the stream except in one
+ case, which is when we have unflushed writes in append mode. */
+static off64_t
+do_ftell_wide (FILE *fp)
+{
+ off64_t result, offset = 0;
+
+ /* No point looking for offsets in the buffer if it hasn't even been
+ allocated. */
+ if (fp->_wide_data->_IO_buf_base != NULL)
+ {
+ const wchar_t *wide_read_base;
+ const wchar_t *wide_read_ptr;
+ const wchar_t *wide_read_end;
+ bool unflushed_writes = (fp->_wide_data->_IO_write_ptr
+ > fp->_wide_data->_IO_write_base);
+
+ bool append_mode = (fp->_flags & _IO_IS_APPENDING) == _IO_IS_APPENDING;
+
+ /* When we have unflushed writes in append mode, seek to the end of the
+ file and record that offset. This is the only time we change the file
+ stream state and it is safe since the file handle is active. */
+ if (unflushed_writes && append_mode)
+ {
+ result = _IO_SYSSEEK (fp, 0, _IO_seek_end);
+ if (result == _IO_pos_BAD)
+ return EOF;
+ else
+ fp->_offset = result;
+ }
+
/* XXX For wide stream with backup store it is not very
reasonable to determine the offset. The pushed-back
character might require a state change and we need not be
return -1;
}
- /* There is no more data in the backup buffer. We can
- switch back. */
- _IO_switch_to_main_wget_area (fp);
+ /* Nothing in the backup store, so note the backed up pointers
+ without changing the state. */
+ wide_read_base = fp->_wide_data->_IO_save_base;
+ wide_read_ptr = wide_read_base;
+ wide_read_end = fp->_wide_data->_IO_save_end;
+ }
+ else
+ {
+ wide_read_base = fp->_wide_data->_IO_read_base;
+ wide_read_ptr = fp->_wide_data->_IO_read_ptr;
+ wide_read_end = fp->_wide_data->_IO_read_end;
}
- dir = _IO_seek_cur, offset = 0; /* Don't move any pointers. */
+ struct _IO_codecvt *cv = fp->_codecvt;
+ int clen = __libio_codecvt_encoding (cv);
+
+ if (!unflushed_writes)
+ {
+ if (clen > 0)
+ {
+ offset -= (wide_read_end - wide_read_ptr) * clen;
+ offset -= fp->_IO_read_end - fp->_IO_read_ptr;
+ }
+ else
+ {
+ int nread;
+
+ size_t delta = wide_read_ptr - wide_read_base;
+ __mbstate_t state = fp->_wide_data->_IO_last_state;
+ nread = __libio_codecvt_length (cv, &state,
+ fp->_IO_read_base,
+ fp->_IO_read_end, delta);
+ offset -= fp->_IO_read_end - fp->_IO_read_base - nread;
+ }
+ }
+ else
+ {
+ if (clen > 0)
+ offset += (fp->_wide_data->_IO_write_ptr
+ - fp->_wide_data->_IO_write_base) * clen;
+ else
+ {
+ size_t delta = (fp->_wide_data->_IO_write_ptr
+ - fp->_wide_data->_IO_write_base);
+
+ /* Allocate enough space for the conversion. */
+ size_t outsize = delta * sizeof (wchar_t);
+ char *out = malloc (outsize);
+ char *outstop = out;
+ const wchar_t *in = fp->_wide_data->_IO_write_base;
+
+ enum __codecvt_result status;
+
+ __mbstate_t state = fp->_wide_data->_IO_last_state;
+ status = __libio_codecvt_out (cv, &state, in, in + delta, &in,
+ out, out + outsize, &outstop);
+
+ /* We don't check for __codecvt_partial because it can be
+ returned on one of two conditions: either the output
+ buffer is full or the input sequence is incomplete. We
+ take care to allocate enough buffer and our input
+ sequences must be complete since they are accepted as
+ wchar_t; if not, then that is an error. */
+ if (__glibc_unlikely (status != __codecvt_ok))
+ {
+ free (out);
+ return WEOF;
+ }
+
+ offset += outstop - out;
+ free (out);
+ }
+
+ /* We don't trust _IO_read_end to represent the current file offset
+ when writing in append mode because the value would have to be
+ shifted to the end of the file during a flush. Use the write base
+ instead, along with the new offset we got above when we did a seek
+ to the end of the file. */
+ if (append_mode)
+ offset += fp->_IO_write_ptr - fp->_IO_write_base;
+ /* For all other modes, _IO_read_end represents the file offset. */
+ else
+ offset += fp->_IO_write_ptr - fp->_IO_read_end;
+ }
+ }
+
+ if (fp->_offset != _IO_pos_BAD)
+ result = fp->_offset;
+ else
+ result = _IO_SYSSEEK (fp, 0, _IO_seek_cur);
+
+ if (result == EOF)
+ return result;
+
+ result += offset;
+
+ if (result < 0)
+ {
+ __set_errno (EINVAL);
+ return EOF;
}
+ return result;
+}
+
+off64_t
+_IO_wfile_seekoff (FILE *fp, off64_t offset, int dir, int mode)
+{
+ off64_t result;
+ off64_t delta, new_offset;
+ long int count;
+
+ /* Short-circuit into a separate function. We don't want to mix any
+ functionality and we don't want to touch anything inside the FILE
+ object. */
+ if (mode == 0)
+ return do_ftell_wide (fp);
+
+ /* POSIX.1 8.2.3.7 says that after a call the fflush() the file
+ offset of the underlying file must be exact. */
+ int must_be_exact = ((fp->_wide_data->_IO_read_base
+ == fp->_wide_data->_IO_read_end)
+ && (fp->_wide_data->_IO_write_base
+ == fp->_wide_data->_IO_write_ptr));
+
+ bool was_writing = ((fp->_wide_data->_IO_write_ptr
+ > fp->_wide_data->_IO_write_base)
+ || _IO_in_put_mode (fp));
+
/* Flush unwritten characters.
(This may do an unneeded write if we seek within the buffer.
But to be able to switch to reading, we would need to set
- egptr to ptr. That can't be done in the current design,
+ egptr to pptr. That can't be done in the current design,
which assumes file_ptr() is eGptr. Anyway, since we probably
end up flushing when we close(), it doesn't make much difference.)
FIXME: simulate mem-mapped files. */
-
- if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_write_base
- || _IO_in_put_mode (fp))
- if (_IO_switch_to_wget_mode (fp))
- return WEOF;
+ if (was_writing && _IO_switch_to_wget_mode (fp))
+ return WEOF;
if (fp->_wide_data->_IO_buf_base == NULL)
{
case _IO_seek_cur:
/* Adjust for read-ahead (bytes is buffer). To do this we must
- find out which position in the external buffer corresponds to
- the current position in the internal buffer. */
+ find out which position in the external buffer corresponds to
+ the current position in the internal buffer. */
cv = fp->_codecvt;
- clen = (*cv->__codecvt_do_encoding) (cv);
+ clen = __libio_codecvt_encoding (cv);
- if (clen > 0)
- offset -= (fp->_wide_data->_IO_read_end
- - fp->_wide_data->_IO_read_ptr) * clen;
- else
+ if (mode != 0 || !was_writing)
{
- int nread;
+ if (clen > 0)
+ {
+ offset -= (fp->_wide_data->_IO_read_end
+ - fp->_wide_data->_IO_read_ptr) * clen;
+ /* Adjust by readahead in external buffer. */
+ offset -= fp->_IO_read_end - fp->_IO_read_ptr;
+ }
+ else
+ {
+ int nread;
- delta = fp->_wide_data->_IO_read_ptr - fp->_wide_data->_IO_read_base;
- fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state;
- nread = (*cv->__codecvt_do_length) (cv, &fp->_wide_data->_IO_state,
+ delta = (fp->_wide_data->_IO_read_ptr
+ - fp->_wide_data->_IO_read_base);
+ fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state;
+ nread = __libio_codecvt_length (cv,
+ &fp->_wide_data->_IO_state,
fp->_IO_read_base,
fp->_IO_read_end, delta);
- fp->_IO_read_ptr = fp->_IO_read_base + nread;
- fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_read_ptr;
- offset -= fp->_IO_read_end - fp->_IO_read_base - nread;
+ fp->_IO_read_ptr = fp->_IO_read_base + nread;
+ fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_read_ptr;
+ offset -= fp->_IO_read_end - fp->_IO_read_base - nread;
+ }
}
if (fp->_offset == _IO_pos_BAD)
goto dumb;
+
/* Make offset absolute, assuming current pointer is file_ptr(). */
offset += fp->_offset;
break;
case _IO_seek_end:
{
- struct _G_stat64 st;
+ struct stat64 st;
if (_IO_SYSSTAT (fp, &st) == 0 && S_ISREG (st.st_mode))
{
offset += st.st_size;
goto dumb;
}
}
- /* At this point, dir==_IO_seek_set. */
- /* If we are only interested in the current position we've found it now. */
- if (mode == 0)
- return offset;
+ _IO_free_wbackup_area (fp);
+
+ /* At this point, dir==_IO_seek_set. */
/* If destination is within current buffer, optimize: */
if (fp->_offset != _IO_pos_BAD && fp->_IO_read_base != NULL
&& !_IO_in_backup (fp))
{
- /* Offset relative to start of main get area. */
- _IO_off64_t rel_offset = (offset - fp->_offset
- + (fp->_IO_read_end - fp->_IO_read_base));
- if (rel_offset >= 0)
+ off64_t start_offset = (fp->_offset
+ - (fp->_IO_read_end - fp->_IO_buf_base));
+ if (offset >= start_offset && offset < fp->_offset)
{
-#if 0
- if (_IO_in_backup (fp))
- _IO_switch_to_main_get_area (fp);
-#endif
- if (rel_offset <= fp->_IO_read_end - fp->_IO_read_base)
- {
- fp->_IO_read_ptr = fp->_IO_read_base + rel_offset;
- _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base);
-
- /* Now set the pointer for the internal buffer. This
- might be an iterative process. Though the read
- pointer is somewhere in the current external buffer
- this does not mean we can convert this whole buffer
- at once fitting in the internal buffer. */
- do
- {
-
- }
- while (0);
+ _IO_setg (fp, fp->_IO_buf_base,
+ fp->_IO_buf_base + (offset - start_offset),
+ fp->_IO_read_end);
+ _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base);
+ _IO_wsetg (fp, fp->_wide_data->_IO_buf_base,
+ fp->_wide_data->_IO_buf_base,
+ fp->_wide_data->_IO_buf_base);
+ _IO_wsetp (fp, fp->_wide_data->_IO_buf_base,
+ fp->_wide_data->_IO_buf_base);
+
+ if (adjust_wide_data (fp, false))
+ goto dumb;
- _IO_mask_flags (fp, 0, _IO_EOF_SEEN);
- goto resync;
- }
-#ifdef TODO
- /* If we have streammarkers, seek forward by reading ahead. */
- if (_IO_have_markers (fp))
- {
- int to_skip = rel_offset
- - (fp->_IO_read_ptr - fp->_IO_read_base);
- if (ignore (to_skip) != to_skip)
- goto dumb;
- _IO_mask_flags (fp, 0, _IO_EOF_SEEN);
- goto resync;
- }
-#endif
- }
-#ifdef TODO
- if (rel_offset < 0 && rel_offset >= Bbase () - Bptr ())
- {
- if (!_IO_in_backup (fp))
- _IO_switch_to_backup_area (fp);
- gbump (fp->_IO_read_end + rel_offset - fp->_IO_read_ptr);
_IO_mask_flags (fp, 0, _IO_EOF_SEEN);
goto resync;
}
-#endif
}
-#ifdef TODO
- _IO_unsave_markers (fp);
-#endif
-
if (fp->_flags & _IO_NO_READS)
goto dumb;
_IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + delta,
fp->_IO_buf_base + count);
_IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base);
+ _IO_wsetg (fp, fp->_wide_data->_IO_buf_base,
+ fp->_wide_data->_IO_buf_base, fp->_wide_data->_IO_buf_base);
+ _IO_wsetp (fp, fp->_wide_data->_IO_buf_base, fp->_wide_data->_IO_buf_base);
+
+ if (adjust_wide_data (fp, true))
+ goto dumb;
+
fp->_offset = result + count;
_IO_mask_flags (fp, 0, _IO_EOF_SEEN);
return offset;
/* We need to do it since it is possible that the file offset in
the kernel may be changed behind our back. It may happen when
we fopen a file and then do a fork. One process may access the
- the file and the kernel file offset will be changed. */
+ file and the kernel file offset will be changed. */
if (fp->_offset >= 0)
_IO_SYSSEEK (fp, fp->_offset, 0);
return offset;
}
+libc_hidden_def (_IO_wfile_seekoff)
-_IO_size_t
-_IO_wfile_xsputn (f, data, n)
- _IO_FILE *f;
- const void *data;
- _IO_size_t n;
+size_t
+_IO_wfile_xsputn (FILE *f, const void *data, size_t n)
{
- register const wchar_t *s = (const wchar_t *) data;
- _IO_size_t to_do = n;
+ const wchar_t *s = (const wchar_t *) data;
+ size_t to_do = n;
int must_flush = 0;
- _IO_size_t count;
+ size_t count;
if (n <= 0)
return 0;
count = f->_wide_data->_IO_buf_end - f->_wide_data->_IO_write_ptr;
if (count >= n)
{
- register const wchar_t *p;
+ const wchar_t *p;
for (p = s + n; p > s; )
{
if (*--p == L'\n')
count = to_do;
if (count > 20)
{
-#ifdef _LIBC
f->_wide_data->_IO_write_ptr =
__wmempcpy (f->_wide_data->_IO_write_ptr, s, count);
-#else
- wmemcpy (f->_wide_data->_IO_write_ptr, s, count);
- f->_wide_data->_IO_write_ptr += count;
-#endif
s += count;
}
else
{
- register wchar_t *p = f->_wide_data->_IO_write_ptr;
- register int i = (int) count;
+ wchar_t *p = f->_wide_data->_IO_write_ptr;
+ int i = (int) count;
while (--i >= 0)
*p++ = *s++;
f->_wide_data->_IO_write_ptr = p;
return n - to_do;
}
+libc_hidden_def (_IO_wfile_xsputn)
-struct _IO_jump_t _IO_wfile_jumps =
+const struct _IO_jump_t _IO_wfile_jumps libio_vtable =
{
JUMP_INIT_DUMMY,
JUMP_INIT(finish, _IO_new_file_finish),
JUMP_INIT(showmanyc, _IO_default_showmanyc),
JUMP_INIT(imbue, _IO_default_imbue)
};
+libc_hidden_data_def (_IO_wfile_jumps)
+
+
+const struct _IO_jump_t _IO_wfile_jumps_mmap libio_vtable =
+{
+ JUMP_INIT_DUMMY,
+ JUMP_INIT(finish, _IO_new_file_finish),
+ JUMP_INIT(overflow, (_IO_overflow_t) _IO_wfile_overflow),
+ JUMP_INIT(underflow, (_IO_underflow_t) _IO_wfile_underflow_mmap),
+ JUMP_INIT(uflow, (_IO_underflow_t) _IO_wdefault_uflow),
+ JUMP_INIT(pbackfail, (_IO_pbackfail_t) _IO_wdefault_pbackfail),
+ JUMP_INIT(xsputn, _IO_wfile_xsputn),
+ JUMP_INIT(xsgetn, _IO_file_xsgetn),
+ JUMP_INIT(seekoff, _IO_wfile_seekoff),
+ JUMP_INIT(seekpos, _IO_default_seekpos),
+ JUMP_INIT(setbuf, _IO_file_setbuf_mmap),
+ JUMP_INIT(sync, (_IO_sync_t) _IO_wfile_sync),
+ JUMP_INIT(doallocate, _IO_wfile_doallocate),
+ JUMP_INIT(read, _IO_file_read),
+ JUMP_INIT(write, _IO_new_file_write),
+ JUMP_INIT(seek, _IO_file_seek),
+ JUMP_INIT(close, _IO_file_close_mmap),
+ JUMP_INIT(stat, _IO_file_stat),
+ JUMP_INIT(showmanyc, _IO_default_showmanyc),
+ JUMP_INIT(imbue, _IO_default_imbue)
+};
+
+const struct _IO_jump_t _IO_wfile_jumps_maybe_mmap libio_vtable =
+{
+ JUMP_INIT_DUMMY,
+ JUMP_INIT(finish, _IO_new_file_finish),
+ JUMP_INIT(overflow, (_IO_overflow_t) _IO_wfile_overflow),
+ JUMP_INIT(underflow, (_IO_underflow_t) _IO_wfile_underflow_maybe_mmap),
+ JUMP_INIT(uflow, (_IO_underflow_t) _IO_wdefault_uflow),
+ JUMP_INIT(pbackfail, (_IO_pbackfail_t) _IO_wdefault_pbackfail),
+ JUMP_INIT(xsputn, _IO_wfile_xsputn),
+ JUMP_INIT(xsgetn, _IO_file_xsgetn),
+ JUMP_INIT(seekoff, _IO_wfile_seekoff),
+ JUMP_INIT(seekpos, _IO_default_seekpos),
+ JUMP_INIT(setbuf, _IO_file_setbuf_mmap),
+ JUMP_INIT(sync, (_IO_sync_t) _IO_wfile_sync),
+ JUMP_INIT(doallocate, _IO_wfile_doallocate),
+ JUMP_INIT(read, _IO_file_read),
+ JUMP_INIT(write, _IO_new_file_write),
+ JUMP_INIT(seek, _IO_file_seek),
+ JUMP_INIT(close, _IO_file_close),
+ JUMP_INIT(stat, _IO_file_stat),
+ JUMP_INIT(showmanyc, _IO_default_showmanyc),
+ JUMP_INIT(imbue, _IO_default_imbue)
+};
projects / thirdparty / glibc.git / blobdiff