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glibc  2.9
Defines | Functions
wfileops.c File Reference
#include <assert.h>
#include <libioP.h>
#include <wchar.h>
#include <gconv.h>
#include <stdlib.h>
#include <string.h>

Go to the source code of this file.

Defines

#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

Functions

int _IO_wdo_write (_IO_FILE *fp, const wchar_t *data, _IO_size_t to_do)
wint_t _IO_wfile_underflow (_IO_FILE *fp)
static wint_t _IO_wfile_underflow_mmap (_IO_FILE *fp)
static wint_t _IO_wfile_underflow_maybe_mmap (_IO_FILE *fp)
wint_t _IO_wfile_overflow (_IO_FILE *f, wint_t wch)
wint_t _IO_wfile_sync (_IO_FILE *fp)
_IO_off64_t _IO_wfile_seekoff (_IO_FILE *fp, _IO_off64_t offset, int dir, int mode)
_IO_size_t _IO_wfile_xsputn (_IO_FILE *f, const void *data, _IO_size_t n)
 libc_hidden_data_def (_IO_wfile_jumps) const

Define Documentation

Definition at line 39 of file wfileops.c.

Definition at line 40 of file wfileops.c.

Definition at line 41 of file wfileops.c.

Definition at line 42 of file wfileops.c.

#define _IO_new_file_fopen   _IO_file_fopen

Definition at line 43 of file wfileops.c.

Definition at line 44 of file wfileops.c.

Definition at line 47 of file wfileops.c.

Definition at line 48 of file wfileops.c.

Definition at line 45 of file wfileops.c.

Definition at line 46 of file wfileops.c.

Definition at line 49 of file wfileops.c.

Definition at line 50 of file wfileops.c.

Definition at line 51 of file wfileops.c.


Function Documentation

int _IO_wdo_write ( _IO_FILE fp,
const wchar_t *  data,
_IO_size_t  to_do 
)

Definition at line 58 of file wfileops.c.

{
  struct _IO_codecvt *cc = fp->_codecvt;

  if (to_do > 0)
    {
      if (fp->_IO_write_end == fp->_IO_write_ptr
         && fp->_IO_write_end != fp->_IO_write_base)
       {
         if (_IO_new_do_write (fp, fp->_IO_write_base,
                            fp->_IO_write_ptr - fp->_IO_write_base) == EOF)
           return WEOF;
       }

      do
       {
         enum __codecvt_result result;
         const wchar_t *new_data;

         /* 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);

         /* 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)
           /* Something went wrong.  */
           return WEOF;

         to_do -= new_data - data;

         /* Next see whether we had problems during the conversion.  If yes,
            we cannot go on.  */
         if (result != __codecvt_ok
             && (result != __codecvt_partial || new_data - data == 0))
           break;

         data = new_data;
       }
      while (to_do > 0);
    }

  _IO_wsetg (fp, fp->_wide_data->_IO_buf_base, fp->_wide_data->_IO_buf_base,
            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_buf_base
                               : fp->_wide_data->_IO_buf_end);

  return to_do == 0 ? 0 : WEOF;
}

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Definition at line 369 of file wfileops.c.

{
  if (f->_flags & _IO_NO_WRITES) /* SET ERROR */
    {
      f->_flags |= _IO_ERR_SEEN;
      __set_errno (EBADF);
      return WEOF;
    }
  /* If currently reading or no buffer allocated. */
  if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0)
    {
      /* Allocate a buffer if needed. */
      if (f->_wide_data->_IO_write_base == 0)
       {
         INTUSE(_IO_wdoallocbuf) (f);
         _IO_wsetg (f, f->_wide_data->_IO_buf_base,
                   f->_wide_data->_IO_buf_base, f->_wide_data->_IO_buf_base);

         if (f->_IO_write_base == NULL)
           {
             INTUSE(_IO_doallocbuf) (f);
             _IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base);
           }
       }
      else
       {
         /* Otherwise must be currently reading.  If _IO_read_ptr
            (and hence also _IO_read_end) is at the buffer end,
            logically slide the buffer forwards one block (by setting
            the read pointers to all point at the beginning of the
            block).  This makes room for subsequent output.
            Otherwise, set the read pointers to _IO_read_end (leaving
            that alone, so it can continue to correspond to the
            external position). */
         if (f->_wide_data->_IO_read_ptr == f->_wide_data->_IO_buf_end)
           {
             f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base;
             f->_wide_data->_IO_read_end = f->_wide_data->_IO_read_ptr =
              f->_wide_data->_IO_buf_base;
           }
       }
      f->_wide_data->_IO_write_ptr = f->_wide_data->_IO_read_ptr;
      f->_wide_data->_IO_write_base = f->_wide_data->_IO_write_ptr;
      f->_wide_data->_IO_write_end = f->_wide_data->_IO_buf_end;
      f->_wide_data->_IO_read_base = f->_wide_data->_IO_read_ptr =
       f->_wide_data->_IO_read_end;

      f->_IO_write_ptr = f->_IO_read_ptr;
      f->_IO_write_base = f->_IO_write_ptr;
      f->_IO_write_end = f->_IO_buf_end;
      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))
       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) == 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) == EOF)
      return WEOF;
  return wch;
}

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_IO_off64_t _IO_wfile_seekoff ( _IO_FILE fp,
_IO_off64_t  offset,
int  dir,
int  mode 
)

Definition at line 505 of file wfileops.c.

{
  _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));

  if (mode == 0)
    {
      /* 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
        able to compute the initial state by reverse transformation
        since there is no guarantee of symmetry.  So we don't even
        try and return an error.  */
      if (_IO_in_backup (fp))
       {
         if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
           {
             __set_errno (EINVAL);
             return -1;
           }

         /* There is no more data in the backup buffer.  We can
            switch back.  */
         INTUSE(_IO_switch_to_main_wget_area) (fp);
       }

      dir = _IO_seek_cur, offset = 0; /* Don't move any pointers. */
    }

  /* 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,
     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 (INTUSE(_IO_switch_to_wget_mode) (fp))
      return WEOF;

  if (fp->_wide_data->_IO_buf_base == NULL)
    {
      /* It could be that we already have a pushback buffer.  */
      if (fp->_wide_data->_IO_read_base != NULL)
       {
         free (fp->_wide_data->_IO_read_base);
         fp->_flags &= ~_IO_IN_BACKUP;
       }
      INTUSE(_IO_doallocbuf) (fp);
      _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base);
      _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base);
      _IO_wsetp (fp, fp->_wide_data->_IO_buf_base,
               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);
    }

  switch (dir)
    {
      struct _IO_codecvt *cv;
      int clen;

    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.  */
      cv = fp->_codecvt;
      clen = (*cv->__codecvt_do_encoding) (cv);

      if (clen > 0)
       offset -= (fp->_wide_data->_IO_read_end
                 - fp->_wide_data->_IO_read_ptr) * clen;
      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,
                                         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;
       }

      if (fp->_offset == _IO_pos_BAD)
       goto dumb;
      /* Make offset absolute, assuming current pointer is file_ptr(). */
      offset += fp->_offset;

      dir = _IO_seek_set;
      break;
    case _IO_seek_set:
      break;
    case _IO_seek_end:
      {
       struct _G_stat64 st;
       if (_IO_SYSSTAT (fp, &st) == 0 && S_ISREG (st.st_mode))
         {
           offset += st.st_size;
           dir = _IO_seek_set;
         }
       else
         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;

  /* 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)
       {
#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)
           {
             enum __codecvt_result status;
             struct _IO_codecvt *cd = fp->_codecvt;
             const char *read_ptr_copy;

             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.  */
             fp->_wide_data->_IO_state = fp->_wide_data->_IO_last_state;
             read_ptr_copy = fp->_IO_read_base;
             fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_base;
             do
              {
                wchar_t buffer[1024];
                wchar_t *ignore;
                status = (*cd->__codecvt_do_in) (cd,
                                             &fp->_wide_data->_IO_state,
                                             read_ptr_copy,
                                             fp->_IO_read_ptr,
                                             &read_ptr_copy,
                                             buffer,
                                             buffer
                                             + (sizeof (buffer)
                                                / sizeof (buffer[0])),
                                             &ignore);
                if (status != __codecvt_ok && status != __codecvt_partial)
                  {
                    fp->_flags |= _IO_ERR_SEEN;
                    goto dumb;
                  }
              }
             while (read_ptr_copy != fp->_IO_read_ptr);

             fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_base;

             _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
  INTUSE(_IO_unsave_markers) (fp);
#endif

  if (fp->_flags & _IO_NO_READS)
    goto dumb;

  /* Try to seek to a block boundary, to improve kernel page management. */
  new_offset = offset & ~(fp->_IO_buf_end - fp->_IO_buf_base - 1);
  delta = offset - new_offset;
  if (delta > fp->_IO_buf_end - fp->_IO_buf_base)
    {
      new_offset = offset;
      delta = 0;
    }
  result = _IO_SYSSEEK (fp, new_offset, 0);
  if (result < 0)
    return EOF;
  if (delta == 0)
    count = 0;
  else
    {
      count = _IO_SYSREAD (fp, fp->_IO_buf_base,
                        (must_be_exact
                         ? delta : fp->_IO_buf_end - fp->_IO_buf_base));
      if (count < delta)
       {
         /* We weren't allowed to read, but try to seek the remainder. */
         offset = count == EOF ? delta : delta-count;
         dir = _IO_seek_cur;
         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);
  fp->_offset = result + count;
  _IO_mask_flags (fp, 0, _IO_EOF_SEEN);
  return offset;
 dumb:

  INTUSE(_IO_unsave_markers) (fp);
  result = _IO_SYSSEEK (fp, offset, dir);
  if (result != EOF)
    {
      _IO_mask_flags (fp, 0, _IO_EOF_SEEN);
      fp->_offset = result;
      _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base);
      _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);
    }
  return result;

resync:
  /* 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. */
  if (fp->_offset >= 0)
    _IO_SYSSEEK (fp, fp->_offset, 0);

  return offset;
}

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Definition at line 443 of file wfileops.c.

{
  _IO_ssize_t delta;
  wint_t retval = 0;

  /*    char* ptr = cur_ptr(); */
  if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_write_base)
    if (_IO_do_flush (fp))
      return WEOF;
  delta = fp->_wide_data->_IO_read_ptr - fp->_wide_data->_IO_read_end;
  if (delta != 0)
    {
      /* 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;

      int clen = (*cv->__codecvt_do_encoding) (cv);

      if (clen > 0)
       /* It is easy, a fixed number of input bytes are used for each
          wide character.  */
       delta *= clen;
      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.  */
         int nread;

         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);
         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)
       {
         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;
    }
  if (retval != WEOF)
    fp->_offset = _IO_pos_BAD;
  /* FIXME: Cleanup - can this be shared? */
  /*    setg(base(), ptr, ptr); */
  return retval;
}

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Definition at line 120 of file wfileops.c.

{
  struct _IO_codecvt *cd;
  enum __codecvt_result status;
  _IO_ssize_t count;
  int tries;
  const char *read_ptr_copy;

  if (__builtin_expect (fp->_flags & _IO_NO_READS, 0))
    {
      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)
    {
      /* There is more in the external.  Convert it.  */
      const char *read_stop = (const char *) fp->_IO_read_ptr;

      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;
      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_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.  */
      if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end)
       return *fp->_wide_data->_IO_read_ptr;

      if (status == __codecvt_error)
       {
         __set_errno (EILSEQ);
         fp->_flags |= _IO_ERR_SEEN;
         return WEOF;
       }

      /* Move the remaining content of the read buffer to the beginning.  */
      memmove (fp->_IO_buf_base, fp->_IO_read_ptr,
              fp->_IO_read_end - fp->_IO_read_ptr);
      fp->_IO_read_end = (fp->_IO_buf_base
                       + (fp->_IO_read_end - fp->_IO_read_ptr));
      fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base;
    }
  else
    fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_read_end =
      fp->_IO_buf_base;

  if (fp->_IO_buf_base == NULL)
    {
      /* Maybe we already have a push back pointer.  */
      if (fp->_IO_save_base != NULL)
       {
         free (fp->_IO_save_base);
         fp->_flags &= ~_IO_IN_BACKUP;
       }
      INTUSE(_IO_doallocbuf) (fp);

      fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_read_end =
       fp->_IO_buf_base;
    }

  fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end =
    fp->_IO_buf_base;

  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;
       }
      INTUSE(_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 0
      INTUSE(_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_acquire_lock (_IO_stdout);

      if ((_IO_stdout->_flags & (_IO_LINKED | _IO_NO_WRITES | _IO_LINE_BUF))
         == (_IO_LINKED | _IO_LINE_BUF))
       _IO_OVERFLOW (_IO_stdout, EOF);

      _IO_release_lock (_IO_stdout);
#endif
    }

  INTUSE(_IO_switch_to_get_mode) (fp);

  fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr =
    fp->_wide_data->_IO_buf_base;
  fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_buf_base;
  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;
 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;
      else
       fp->_flags |= _IO_ERR_SEEN, count = 0;
    }
  fp->_IO_read_end += count;
  if (count == 0)
    {
      if (tries != 0)
       /* There are some bytes in the external buffer but they don't
           convert to anything.  */
       __set_errno (EILSEQ);
      return WEOF;
    }
  if (fp->_offset != _IO_pos_BAD)
    _IO_pos_adjust (fp->_offset, count);

  /* 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;
  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)
       {
         __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;
      goto again;
    }

  return *fp->_wide_data->_IO_read_ptr;
}

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static wint_t _IO_wfile_underflow_maybe_mmap ( _IO_FILE fp) [static]

Definition at line 356 of file wfileops.c.

{
  /* 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);
}

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static wint_t _IO_wfile_underflow_mmap ( _IO_FILE fp) [static]

Definition at line 294 of file wfileops.c.

{
  struct _IO_codecvt *cd;
  enum __codecvt_result status;
  const char *read_stop;

  if (__builtin_expect (fp->_flags & _IO_NO_READS, 0))
    {
      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;
       }
      INTUSE(_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;
  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_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;
}

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_IO_size_t _IO_wfile_xsputn ( _IO_FILE f,
const void *  data,
_IO_size_t  n 
)

Definition at line 783 of file wfileops.c.

{
  register const wchar_t *s = (const wchar_t *) data;
  _IO_size_t to_do = n;
  int must_flush = 0;
  _IO_size_t count;

  if (n <= 0)
    return 0;
  /* This is an optimized implementation.
     If the amount to be written straddles a block boundary
     (or the filebuf is unbuffered), use sys_write directly. */

  /* First figure out how much space is available in the buffer. */
  count = f->_wide_data->_IO_write_end - f->_wide_data->_IO_write_ptr;
  if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING))
    {
      count = f->_wide_data->_IO_buf_end - f->_wide_data->_IO_write_ptr;
      if (count >= n)
       {
         register const wchar_t *p;
         for (p = s + n; p > s; )
           {
             if (*--p == L'\n')
              {
                count = p - s + 1;
                must_flush = 1;
                break;
              }
           }
       }
    }
  /* Then fill the buffer. */
  if (count > 0)
    {
      if (count > to_do)
       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;
         while (--i >= 0)
           *p++ = *s++;
         f->_wide_data->_IO_write_ptr = p;
       }
      to_do -= count;
    }
  if (to_do > 0)
    to_do -= INTUSE(_IO_wdefault_xsputn) (f, s, to_do);
  if (must_flush
      && f->_wide_data->_IO_write_ptr != f->_wide_data->_IO_write_base)
    INTUSE(_IO_wdo_write) (f, f->_wide_data->_IO_write_base,
                        f->_wide_data->_IO_write_ptr
                        - f->_wide_data->_IO_write_base);

  return n - to_do;
}

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libc_hidden_data_def ( _IO_wfile_jumps  ) const