acinclude.m4 (GLIBCPP_ENABLE_CSTDIO): Simplify.

2003-06-11  Benjamin Kosnik  <bkoz@redhat.com>

	* acinclude.m4 (GLIBCPP_ENABLE_CSTDIO): Simplify.
	* aclocal.m4: Regenerate.
	* Makefile.am (SUBDIRS): Remove libio.
	* Makefile.in: Regenerate.
	* configure.in: Same.
	* configure: Regenerate.
	* config/io/basic_file_libio.cc: Remove.
	* config/io/basic_file_libio.h: Remove.
	* config/io/c_io_libio_codecvt.c: Remove.
	* config/io/c_io_libio.h: Remove.
	* libio/*: Remove.
	* src/Makefile.am: Same.
	* src/Makefile.in: Regenerate.
	* docs/html/configopts.html: Edits.
	* docs/html/explanations.html: Edits.

From-SVN: r67813

1 files changed, 0 insertions, 1049 deletions

diff --git a/libstdc++-v3/libio/fileops.c b/libstdc++-v3/libio/fileops.c
deleted file mode 100644
index a830b5c..0000000
--- a/libstdc++-v3/libio/fileops.c
+++ /dev/null
@@ -1,1049 +0,0 @@
-/* Copyright (C) 1993, 1995, 1997-1999, 2000 Free Software Foundation, Inc.
-   This file is part of the GNU IO Library.
-   Written by Per Bothner <bothner@cygnus.com>.
-
-   This library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU General Public License as
-   published by the Free Software Foundation; either version 2, or (at
-   your option) any later version.
-
-   This library is distributed in the hope that it will be useful, but
-   WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this library; see the file COPYING.  If not, write to
-   the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
-   MA 02111-1307, USA.
-
-   As a special exception, if you link this library with files
-   compiled with a GNU compiler to produce an executable, this does
-   not cause the resulting executable to be covered by the GNU General
-   Public License.  This exception does not however invalidate any
-   other reasons why the executable file might be covered by the GNU
-   General Public License.  */
-
-
-#ifndef _POSIX_SOURCE
-# define _POSIX_SOURCE
-#endif
-#include "libioP.h"
-#include <fcntl.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <string.h>
-#include <errno.h>
-#ifdef __STDC__
-#include <stdlib.h>
-#endif
-#if _LIBC
-# include "../wcsmbs/wcsmbsload.h"
-# include <shlib-compat.h>
-#endif
-#ifndef errno
-extern int errno;
-#endif
-#ifndef __set_errno
-# define __set_errno(Val) errno = (Val)
-#endif
-
-
-#ifdef _LIBC
-# define open(Name, Flags, Prot) __open (Name, Flags, Prot)
-# define close(FD) __close (FD)
-# define lseek(FD, Offset, Whence) __lseek (FD, Offset, Whence)
-# define read(FD, Buf, NBytes) __read (FD, Buf, NBytes)
-# define write(FD, Buf, NBytes) __write (FD, Buf, NBytes)
-#else
-# 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
-
-/* An fstream can be in at most one of put mode, get mode, or putback mode.
-   Putback mode is a variant of get mode.
-
-   In a filebuf, there is only one current position, instead of two
-   separate get and put pointers.  In get mode, the current position
-   is that of gptr(); in put mode that of pptr().
-
-   The position in the buffer that corresponds to the position
-   in external file system is normally _IO_read_end, except in putback
-   mode, when it is _IO_save_end.
-   If the field _fb._offset is >= 0, it gives the offset in
-   the file as a whole corresponding to eGptr(). (?)
-
-   PUT MODE:
-   If a filebuf is in put mode, then all of _IO_read_ptr, _IO_read_end,
-   and _IO_read_base are equal to each other.  These are usually equal
-   to _IO_buf_base, though not necessarily if we have switched from
-   get mode to put mode.  (The reason is to maintain the invariant
-   that _IO_read_end corresponds to the external file position.)
-   _IO_write_base is non-NULL and usually equal to _IO_base_base.
-   We also have _IO_write_end == _IO_buf_end, but only in fully buffered mode.
-   The un-flushed character are those between _IO_write_base and _IO_write_ptr.
-
-   GET MODE:
-   If a filebuf is in get or putback mode, eback() != egptr().
-   In get mode, the unread characters are between gptr() and egptr().
-   The OS file position corresponds to that of egptr().
-
-   PUTBACK MODE:
-   Putback mode is used to remember "excess" characters that have
-   been sputbackc'd in a separate putback buffer.
-   In putback mode, the get buffer points to the special putback buffer.
-   The unread characters are the characters between gptr() and egptr()
-   in the putback buffer, as well as the area between save_gptr()
-   and save_egptr(), which point into the original reserve buffer.
-   (The pointers save_gptr() and save_egptr() are the values
-   of gptr() and egptr() at the time putback mode was entered.)
-   The OS position corresponds to that of save_egptr().
-
-   LINE BUFFERED OUTPUT:
-   During line buffered output, _IO_write_base==base() && epptr()==base().
-   However, ptr() may be anywhere between base() and ebuf().
-   This forces a call to filebuf::overflow(int C) on every put.
-   If there is more space in the buffer, and C is not a '\n',
-   then C is inserted, and pptr() incremented.
-
-   UNBUFFERED STREAMS:
-   If a filebuf is unbuffered(), the _shortbuf[1] is used as the buffer.
-*/
-
-#define CLOSED_FILEBUF_FLAGS \
-  (_IO_IS_FILEBUF+_IO_NO_READS+_IO_NO_WRITES+_IO_TIED_PUT_GET)
-
-
-void
-_IO_new_file_init (fp)
-     struct _IO_FILE_plus *fp;
-{
-  /* POSIX.1 allows another file handle to be used to change the position
-     of our file descriptor.  Hence we actually don't know the actual
-     position before we do the first fseek (and until a following fflush). */
-  fp->file._offset = _IO_pos_BAD;
-  fp->file._IO_file_flags |= CLOSED_FILEBUF_FLAGS;
-
-  _IO_link_in (fp);
-  fp->file._fileno = -1;
-}
-
-int
-_IO_new_file_close_it (fp)
-     _IO_FILE *fp;
-{
-  int write_status, close_status;
-  if (!_IO_file_is_open (fp))
-    return EOF;
-
-  write_status = _IO_do_flush (fp);
-
-  _IO_unsave_markers(fp);
-
-  close_status = _IO_SYSCLOSE (fp);
-
-  /* Free buffer. */
-  if (fp->_mode <= 0)
-    {
-      _IO_setb (fp, NULL, NULL, 0);
-      _IO_setg (fp, NULL, NULL, NULL);
-      _IO_setp (fp, NULL, NULL);
-    }
-#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
-  else
-    {
-      _IO_wsetb (fp, NULL, NULL, 0);
-      _IO_wsetg (fp, NULL, NULL, NULL);
-      _IO_wsetp (fp, NULL, NULL);
-    }
-#endif
-
-  _IO_un_link ((struct _IO_FILE_plus *) fp);
-  fp->_flags = _IO_MAGIC|CLOSED_FILEBUF_FLAGS;
-  fp->_fileno = -1;
-  fp->_offset = _IO_pos_BAD;
-
-  return close_status ? close_status : write_status;
-}
-
-void
-_IO_new_file_finish (fp, dummy)
-     _IO_FILE *fp;
-     int dummy;
-{
-  if (_IO_file_is_open (fp))
-    {
-      _IO_do_flush (fp);
-      if (!(fp->_flags & _IO_DELETE_DONT_CLOSE))
-	_IO_SYSCLOSE (fp);
-    }
-  _IO_default_finish (fp, 0);
-}
-
-#if defined __GNUC__ && __GNUC__ >= 2
-__inline__
-#endif
-_IO_FILE *
-_IO_file_open (fp, filename, posix_mode, prot, read_write, is32not64)
-     _IO_FILE *fp;
-     const char *filename;
-     int posix_mode;
-     int prot;
-     int read_write;
-     int is32not64;
-{
-  int fdesc;
-#ifdef _G_OPEN64
-  fdesc = (is32not64
-	   ? open (filename, posix_mode, prot)
-	   : _G_OPEN64 (filename, posix_mode, prot));
-#else
-  fdesc = open (filename, posix_mode, prot);
-#endif
-  if (fdesc < 0)
-    return NULL;
-  fp->_fileno = fdesc;
-  _IO_mask_flags (fp, read_write,_IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING);
-  if (read_write & _IO_IS_APPENDING)
-    if (_IO_SEEKOFF (fp, (_IO_off64_t)0, _IO_seek_end, _IOS_INPUT|_IOS_OUTPUT)
-	== _IO_pos_BAD && errno != ESPIPE)
-      return NULL;
-  _IO_link_in ((struct _IO_FILE_plus *) fp);
-  return fp;
-}
-
-_IO_FILE *
-_IO_new_file_fopen (fp, filename, mode, is32not64)
-     _IO_FILE *fp;
-     const char *filename;
-     const char *mode;
-     int is32not64;
-{
-  int oflags = 0, omode;
-  int read_write;
-  int oprot = 0666;
-  int i;
-  _IO_FILE *result;
-#if _LIBC
-  const char *cs;
-#endif
-
-  if (_IO_file_is_open (fp))
-    return 0;
-  switch (*mode)
-    {
-    case 'r':
-      omode = O_RDONLY;
-      read_write = _IO_NO_WRITES;
-      break;
-    case 'w':
-      omode = O_WRONLY;
-      oflags = O_CREAT|O_TRUNC;
-      read_write = _IO_NO_READS;
-      break;
-    case 'a':
-      omode = O_WRONLY;
-      oflags = O_CREAT|O_APPEND;
-      read_write = _IO_NO_READS|_IO_IS_APPENDING;
-      break;
-    default:
-      __set_errno (EINVAL);
-      return NULL;
-    }
-  for (i = 1; i < 4; ++i)
-    {
-      switch (*++mode)
-	{
-	case '\0':
-	  break;
-	case '+':
-	  omode = O_RDWR;
-	  read_write &= _IO_IS_APPENDING;
-	  continue;
-	case 'x':
-	  oflags |= O_EXCL;
-	  continue;
-	case 'b':
-	default:
-	  /* Ignore.  */
-	  continue;
-	}
-      break;
-    }
-
-  result = _IO_file_open (fp, filename, omode|oflags, oprot, read_write,
-			  is32not64);
-
-
-#if _LIBC
-  /* Test whether the mode string specifies the conversion.  */
-  cs = strstr (mode, ",ccs=");
-  if (cs != NULL)
-    {
-      /* Yep.  Load the appropriate conversions and set the orientation
-	 to wide.  */
-	struct gconv_fcts fcts;
-	struct _IO_codecvt *cc;
-
-	if (! _IO_CHECK_WIDE (fp) || __wcsmbs_named_conv (&fcts, cs + 5) != 0)
-	  {
-	    /* Something went wrong, we cannot load the conversion modules.
-	       This means we cannot proceed since the user explicitly asked
-	       for these.  */
-	    _IO_new_fclose (result);
-	    return NULL;
-	  }
-
-	cc = fp->_codecvt = &fp->_wide_data->_codecvt;
-
-	/* The functions are always the same.  */
-	*cc = __libio_codecvt;
-
-	cc->__cd_in.__cd.__nsteps = 1; /* Only one step allowed.  */
-	cc->__cd_in.__cd.__steps = fcts.towc;
-
-	cc->__cd_in.__cd.__data[0].__invocation_counter = 0;
-	cc->__cd_in.__cd.__data[0].__internal_use = 1;
-	cc->__cd_in.__cd.__data[0].__flags = __GCONV_IS_LAST;
-	cc->__cd_in.__cd.__data[0].__statep = &result->_wide_data->_IO_state;
-
-	cc->__cd_out.__cd.__nsteps = 1; /* Only one step allowed.  */
-	cc->__cd_out.__cd.__steps = fcts.tomb;
-
-	cc->__cd_out.__cd.__data[0].__invocation_counter = 0;
-	cc->__cd_out.__cd.__data[0].__internal_use = 1;
-	cc->__cd_out.__cd.__data[0].__flags = __GCONV_IS_LAST;
-	cc->__cd_out.__cd.__data[0].__statep = &result->_wide_data->_IO_state;
-
-	/* Set the mode now.  */
-	result->_mode = 1;
-    }
-#endif	/* GNU libc */
-
-  return result;
-}
-
-_IO_FILE *
-_IO_new_file_attach (fp, fd)
-     _IO_FILE *fp;
-     int fd;
-{
-  if (_IO_file_is_open (fp))
-    return NULL;
-  fp->_fileno = fd;
-  fp->_flags &= ~(_IO_NO_READS+_IO_NO_WRITES);
-  fp->_flags |= _IO_DELETE_DONT_CLOSE;
-  /* Get the current position of the file. */
-  /* We have to do that since that may be junk. */
-  fp->_offset = _IO_pos_BAD;
-  if (_IO_SEEKOFF (fp, (_IO_off64_t)0, _IO_seek_cur, _IOS_INPUT|_IOS_OUTPUT)
-      == _IO_pos_BAD && errno != ESPIPE)
-    return NULL;
-  return fp;
-}
-
-_IO_FILE *
-_IO_new_file_setbuf (fp, p, len)
-     _IO_FILE *fp;
-     char *p;
-     _IO_ssize_t len;
-{
-  if (_IO_default_setbuf (fp, p, len) == NULL)
-    return NULL;
-
-  fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end
-    = fp->_IO_buf_base;
-  _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base);
-
-  return fp;
-}
-
-static int new_do_write __P ((_IO_FILE *, const char *, _IO_size_t));
-
-/* Write TO_DO bytes from DATA to FP.
-   Then mark FP as having empty buffers. */
-
-int
-_IO_new_do_write (fp, data, to_do)
-     _IO_FILE *fp;
-     const char *data;
-     _IO_size_t to_do;
-{
-  return (to_do == 0 || new_do_write (fp, data, to_do) == to_do) ? 0 : EOF;
-}
-
-static
-int
-new_do_write (fp, data, to_do)
-     _IO_FILE *fp;
-     const char *data;
-     _IO_size_t to_do;
-{
-  _IO_size_t count;
-  if (fp->_flags & _IO_IS_APPENDING)
-    /* On a system without a proper O_APPEND implementation,
-       you would need to sys_seek(0, SEEK_END) here, but is
-       is not needed nor desirable for Unix- or Posix-like systems.
-       Instead, just indicate that offset (before and after) is
-       unpredictable. */
-    fp->_offset = _IO_pos_BAD;
-  else if (fp->_IO_read_end != fp->_IO_write_base)
-    {
-      _IO_off64_t new_pos
-	= _IO_SYSSEEK (fp, fp->_IO_write_base - fp->_IO_read_end, 1);
-      if (new_pos == _IO_pos_BAD)
-	return 0;
-      fp->_offset = new_pos;
-    }
-  count = _IO_SYSWRITE (fp, data, to_do);
-  if (fp->_cur_column && count)
-    fp->_cur_column = _IO_adjust_column (fp->_cur_column - 1, data, count) + 1;
-  _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base);
-  fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_buf_base;
-  fp->_IO_write_end = (fp->_mode < 0
-		       && (fp->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED))
-		       ? fp->_IO_buf_base : fp->_IO_buf_end);
-  return count;
-}
-
-int
-_IO_new_file_underflow (fp)
-     _IO_FILE *fp;
-{
-  _IO_ssize_t count;
-#if 0
-  /* SysV does not make this test; take it out for compatibility */
-  if (fp->_flags & _IO_EOF_SEEN)
-    return (EOF);
-#endif
-
-  if (fp->_flags & _IO_NO_READS)
-    {
-      fp->_flags |= _IO_ERR_SEEN;
-      __set_errno (EBADF);
-      return EOF;
-    }
-  if (fp->_IO_read_ptr < fp->_IO_read_end)
-    return *(unsigned char *) fp->_IO_read_ptr;
-
-  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;
-	}
-      _IO_doallocbuf (fp);
-    }
-
-  /* Flush all line buffered files before reading. */
-  /* FIXME This can/should be moved to genops ?? */
-  if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED))
-    _IO_flush_all_linebuffered ();
-
-  _IO_switch_to_get_mode (fp);
-
-  /* This is very tricky. We have to adjust those
-     pointers before we call _IO_SYSREAD () since
-     we may longjump () out while waiting for
-     input. Those pointers may be screwed up. H.J. */
-  fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base;
-  fp->_IO_read_end = fp->_IO_buf_base;
-  fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end
-    = fp->_IO_buf_base;
-
-  count = _IO_SYSREAD (fp, fp->_IO_buf_base,
-		       fp->_IO_buf_end - fp->_IO_buf_base);
-  if (count <= 0)
-    {
-      if (count == 0)
-	fp->_flags |= _IO_EOF_SEEN;
-      else
-	fp->_flags |= _IO_ERR_SEEN, count = 0;
-  }
-  fp->_IO_read_end += count;
-  if (count == 0)
-    return EOF;
-  if (fp->_offset != _IO_pos_BAD)
-    _IO_pos_adjust (fp->_offset, count);
-  return *(unsigned char *) fp->_IO_read_ptr;
-}
-
-int
-_IO_new_file_overflow (f, ch)
-      _IO_FILE *f;
-      int ch;
-{
-  if (f->_flags & _IO_NO_WRITES) /* SET ERROR */
-    {
-      f->_flags |= _IO_ERR_SEEN;
-      __set_errno (EBADF);
-      return EOF;
-    }
-  /* If currently reading or no buffer allocated. */
-  if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0 || f->_IO_write_base == 0)
-    {
-      /* Allocate a buffer if needed. */
-      if (f->_IO_write_base == 0)
-	{
-	  _IO_doallocbuf (f);
-	  _IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base);
-	}
-      /* 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->_IO_read_ptr == f->_IO_buf_end)
-	f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base;
-      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->_mode < 0 && f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED))
-	f->_IO_write_end = f->_IO_write_ptr;
-    }
-  if (ch == EOF)
-    return _IO_new_do_write(f, f->_IO_write_base,
-			    f->_IO_write_ptr - f->_IO_write_base);
-  if (f->_IO_write_ptr == f->_IO_buf_end ) /* Buffer is really full */
-    if (_IO_do_flush (f) == EOF)
-      return EOF;
-  *f->_IO_write_ptr++ = ch;
-  if ((f->_flags & _IO_UNBUFFERED)
-      || ((f->_flags & _IO_LINE_BUF) && ch == '\n'))
-    if (_IO_new_do_write(f, f->_IO_write_base,
-			 f->_IO_write_ptr - f->_IO_write_base) == EOF)
-      return EOF;
-  return (unsigned char) ch;
-}
-
-int
-_IO_new_file_sync (fp)
-     _IO_FILE *fp;
-{
-  _IO_ssize_t delta;
-  int retval = 0;
-
-  /*    char* ptr = cur_ptr(); */
-  if (fp->_IO_write_ptr > fp->_IO_write_base)
-    if (_IO_do_flush(fp)) return EOF;
-  delta = fp->_IO_read_ptr - fp->_IO_read_end;
-  if (delta != 0)
-    {
-#ifdef TODO
-      if (_IO_in_backup (fp))
-	delta -= eGptr () - Gbase ();
-#endif
-      _IO_off64_t new_pos = _IO_SYSSEEK (fp, delta, 1);
-      if (new_pos != (_IO_off64_t) EOF)
-	fp->_IO_read_end = fp->_IO_read_ptr;
-#ifdef ESPIPE
-      else if (errno == ESPIPE)
-	; /* Ignore error from unseekable devices. */
-#endif
-      else
-	retval = EOF;
-    }
-  if (retval != EOF)
-    fp->_offset = _IO_pos_BAD;
-  /* FIXME: Cleanup - can this be shared? */
-  /*    setg(base(), ptr, ptr); */
-  return retval;
-}
-
-_IO_off64_t
-_IO_new_file_seekoff (fp, offset, dir, mode)
-     _IO_FILE *fp;
-     _IO_off64_t offset;
-     int dir;
-     int mode;
-{
-  _IO_off64_t result;
-  _IO_off64_t delta, new_offset;
-  long 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->_IO_read_base == fp->_IO_read_end
-		       && fp->_IO_write_base == fp->_IO_write_ptr);
-
-  if (mode == 0)
-    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-papped files. */
-
-  if (fp->_IO_write_ptr > fp->_IO_write_base || _IO_in_put_mode (fp))
-    if (_IO_switch_to_get_mode (fp))
-      return EOF;
-
-  if (fp->_IO_buf_base == NULL)
-    {
-      /* It could be that we already have a pushback buffer.  */
-      if (fp->_IO_read_base != NULL)
-	{
-	  free (fp->_IO_read_base);
-	  fp->_flags &= ~_IO_IN_BACKUP;
-	}
-      _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);
-    }
-
-  switch (dir)
-    {
-    case _IO_seek_cur:
-      /* Adjust for read-ahead (bytes is buffer). */
-      offset -= fp->_IO_read_end - fp->_IO_read_ptr;
-      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)
-	    {
-	      _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + rel_offset,
-			fp->_IO_read_end);
-	      _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_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
-  _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:
-
-  _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);
-    }
-  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;
-}
-
-_IO_ssize_t
-_IO_file_read (fp, buf, size)
-     _IO_FILE *fp;
-     void *buf;
-     _IO_ssize_t size;
-{
-  return read (fp->_fileno, buf, size);
-}
-
-_IO_off64_t
-_IO_file_seek (fp, offset, dir)
-     _IO_FILE *fp;
-     _IO_off64_t offset;
-     int dir;
-{
-#ifdef _G_LSEEK64
-  return _G_LSEEK64 (fp->_fileno, offset, dir);
-#else
-  return lseek (fp->_fileno, offset, dir);
-#endif
-}
-
-int
-_IO_file_stat (fp, st)
-     _IO_FILE *fp;
-     void *st;
-{
-#ifdef _G_FSTAT64
-  return _G_FSTAT64 (fp->_fileno, (struct _G_stat64 *) st);
-#else
-  return fstat (fp->_fileno, (struct stat *) st);
-#endif
-}
-
-int
-_IO_file_close (fp)
-     _IO_FILE *fp;
-{
-  return close (fp->_fileno);
-}
-
-_IO_ssize_t
-_IO_new_file_write (f, data, n)
-     _IO_FILE *f;
-     const void *data;
-     _IO_ssize_t n;
-{
-  _IO_ssize_t to_do = n;
-  while (to_do > 0)
-    {
-      _IO_ssize_t count = write (f->_fileno, data, to_do);
-      if (count < 0)
-	{
-	  f->_flags |= _IO_ERR_SEEN;
-	  break;
-        }
-      to_do -= count;
-      data = (void *) ((char *) data + count);
-    }
-  n -= to_do;
-  if (f->_offset >= 0)
-    f->_offset += n;
-  return n;
-}
-
-_IO_size_t
-_IO_new_file_xsputn (f, data, n)
-     _IO_FILE *f;
-     const void *data;
-     _IO_size_t n;
-{
-  register const char *s = (const char *) 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->_IO_write_end - f->_IO_write_ptr; /* Space available. */
-  if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING))
-    {
-      count = f->_IO_buf_end - f->_IO_write_ptr;
-      if (count >= n)
-	{
-	  register const char *p;
-	  for (p = s + n; p > s; )
-	    {
-	      if (*--p == '\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->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count);
-#else
-	  memcpy (f->_IO_write_ptr, s, count);
-	  f->_IO_write_ptr += count;
-#endif
-	  s += count;
-	}
-      else
-	{
-	  register char *p = f->_IO_write_ptr;
-	  register int i = (int) count;
-	  while (--i >= 0)
-	    *p++ = *s++;
-	  f->_IO_write_ptr = p;
-	}
-      to_do -= count;
-    }
-  if (to_do + must_flush > 0)
-    {
-      _IO_size_t block_size, do_write;
-      /* Next flush the (full) buffer. */
-      if (_IO_OVERFLOW (f, EOF) == EOF)
-	return n - to_do;
-
-      /* Try to maintain alignment: write a whole number of blocks.
-	 dont_write is what gets left over. */
-      block_size = f->_IO_buf_end - f->_IO_buf_base;
-      do_write = to_do - (block_size >= 128 ? to_do % block_size : 0);
-
-      if (do_write)
-        {
-	  count = new_do_write (f, s, do_write);
-	  to_do -= count;
-	  if (count < do_write)
-	    return n - to_do;
-        }
-
-      /* Now write out the remainder.  Normally, this will fit in the
-	 buffer, but it's somewhat messier for line-buffered files,
-	 so we let _IO_default_xsputn handle the general case. */
-      if (to_do)
-	to_do -= _IO_default_xsputn (f, s+do_write, to_do);
-    }
-  return n - to_do;
-}
-
-_IO_size_t
-_IO_file_xsgetn (fp, data, n)
-     _IO_FILE *fp;
-     void *data;
-     _IO_size_t n;
-{
-  register _IO_size_t want, have;
-  register _IO_ssize_t count;
-  register char *s = data;
-
-  want = n;
-
-  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;
-	}
-      _IO_doallocbuf (fp);
-    }
-
-  while (want > 0)
-    {
-      have = fp->_IO_read_end - fp->_IO_read_ptr;
-      if (want <= have)
-	{
-	  memcpy (s, fp->_IO_read_ptr, want);
-	  fp->_IO_read_ptr += want;
-	  want = 0;
-	}
-      else
-	{
-	  if (have > 0)
-	    {
-#ifdef _LIBC
-	      s = __mempcpy (s, fp->_IO_read_ptr, have);
-#else
-	      memcpy (s, fp->_IO_read_ptr, have);
-	      s += have;
-#endif
-	      want -= have;
-	      fp->_IO_read_ptr += have;
-	    }
-
-	  /* Check for backup and repeat */
-	  if (_IO_in_backup (fp))
-	    {
-	      _IO_switch_to_main_get_area (fp);
-	      continue;
-	    }
-
-	  /* If we now want less than a buffer, underflow and repeat
-	     the copy.  Otherwise, _IO_SYSREAD directly to
-	     the user buffer. */
-	  if (fp->_IO_buf_base && want < fp->_IO_buf_end - fp->_IO_buf_base)
-	    {
-	      if (__underflow (fp) == EOF)
-		break;
-
-	      continue;
-	    }
-
-	  /* These must be set before the sysread as we might longjmp out
-	     waiting for input. */
-	  _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);
-
-	  /* Try to maintain alignment: read a whole number of blocks.  */
-	  count = want;
-	  if (fp->_IO_buf_base)
-	    {
-	      _IO_size_t block_size = fp->_IO_buf_end - fp->_IO_buf_base;
-	      if (block_size >= 128)
-		count -= want % block_size;
-	    }
-
-	  count = _IO_SYSREAD (fp, s, count);
-	  if (count <= 0)
-	    {
-	      if (count == 0)
-		fp->_flags |= _IO_EOF_SEEN;
-	      else
-		fp->_flags |= _IO_ERR_SEEN;
-
-	      break;
-	    }
-
-	  s += count;
-	  want -= count;
-	  if (fp->_offset != _IO_pos_BAD)
-	    _IO_pos_adjust (fp->_offset, count);
-	}
-    }
-
-  return n - want;
-}
-
-struct _IO_jump_t _IO_file_jumps =
-{
-  JUMP_INIT_DUMMY,
-  JUMP_INIT(finish, _IO_new_file_finish),
-  JUMP_INIT(overflow, _IO_new_file_overflow),
-  JUMP_INIT(underflow, _IO_new_file_underflow),
-  JUMP_INIT(uflow, _IO_default_uflow),
-  JUMP_INIT(pbackfail, _IO_default_pbackfail),
-  JUMP_INIT(xsputn, _IO_new_file_xsputn),
-  JUMP_INIT(xsgetn, _IO_file_xsgetn),
-  JUMP_INIT(seekoff, _IO_new_file_seekoff),
-  JUMP_INIT(seekpos, _IO_default_seekpos),
-  JUMP_INIT(setbuf, _IO_new_file_setbuf),
-  JUMP_INIT(sync, _IO_new_file_sync),
-  JUMP_INIT(doallocate, _IO_file_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)
-};
-
-#ifdef _LIBC
-versioned_symbol (libc, _IO_new_do_write, _IO_do_write, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_file_attach, _IO_file_attach, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_file_close_it, _IO_file_close_it, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_file_finish, _IO_file_finish, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_file_fopen, _IO_file_fopen, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_file_init, _IO_file_init, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_file_setbuf, _IO_file_setbuf, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_file_sync, _IO_file_sync, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_file_overflow, _IO_file_overflow, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_file_seekoff, _IO_file_seekoff, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_file_underflow, _IO_file_underflow, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_file_write, _IO_file_write, GLIBC_2_1);
-versioned_symbol (libc, _IO_new_file_xsputn, _IO_file_xsputn, GLIBC_2_1);
-#endif