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/*

 * Copyright (c) 1990 The Regents of the University of California.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms are permitted

 * provided that the above copyright notice and this paragraph are

 * duplicated in all such forms and that any documentation,

 * advertising materials, and other materials related to such

 * distribution and use acknowledge that the software was developed

 * by the University of California, Berkeley.  The name of the

 * University may not be used to endorse or promote products derived

 * from this software without specific prior written permission.

 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

 */

/* No user fns here.  Pesch 15apr92. */

#include <_ansi.h>

#include <reent.h>

#include <stdio.h>

#include <sys/types.h>

#include <fcntl.h>

#include <sys/unistd.h>

#include "local.h"

/*

 * Small standard I/O/seek/close functions.

 * These maintain the `known seek offset' for seek optimisation.

 */

_READ_WRITE_RETURN_TYPE

_DEFUN(__sread, (ptr, cookie, buf, n),

       struct _reent *ptr _AND

       void *cookie _AND

       char *buf _AND

       int n)

{

  register FILE *fp = (FILE *) cookie;

  register int ret;

#ifdef __SCLE

  int oldmode = 0;

  if (fp->_flags & __SCLE)

    oldmode = setmode (fp->_file, O_BINARY);

#endif

  ret = _read_r (ptr, fp->_file, buf, n);

#ifdef __SCLE

  if (oldmode)

    setmode (fp->_file, oldmode);

#endif

  /* If the read succeeded, update the current offset.  */

  if (ret >= 0)

    fp->_offset += ret;

  else

    fp->_flags &= ~__SOFF;      /* paranoia */

  return ret;

}

_READ_WRITE_RETURN_TYPE

_DEFUN(__swrite, (ptr, cookie, buf, n),

       struct _reent *ptr _AND

       void *cookie _AND

       char const *buf _AND

       int n)

{

  register FILE *fp = (FILE *) cookie;

  int w;

#ifdef __SCLE

  int oldmode=0;

#endif

  if (fp->_flags & __SAPP)

    _lseek_r (ptr, fp->_file, (_off_t) 0, SEEK_END);

  fp->_flags &= ~__SOFF;        /* in case O_APPEND mode is set */

#ifdef __SCLE

  if (fp->_flags & __SCLE)

    oldmode = setmode (fp->_file, O_BINARY);

#endif

  w = _write_r (ptr, fp->_file, buf, n);

#ifdef __SCLE

  if (oldmode)

    setmode (fp->_file, oldmode);

#endif

  return w;

}

_fpos_t

_DEFUN(__sseek, (ptr, cookie, offset, whence),

       struct _reent *ptr _AND

       void *cookie _AND

       _fpos_t offset _AND

       int whence)

{

  register FILE *fp = (FILE *) cookie;

  register _off_t ret;

  ret = _lseek_r (ptr, fp->_file, (_off_t) offset, whence);

  if (ret == -1L)

    fp->_flags &= ~__SOFF;

  else

    {

      fp->_flags |= __SOFF;

      fp->_offset = ret;

    }

  return ret;

}

int

_DEFUN(__sclose, (ptr, cookie),

       struct _reent *ptr _AND

       void *cookie)

{

  FILE *fp = (FILE *) cookie;

  return _close_r (ptr, fp->_file);

}

#ifdef __SCLE

int

_DEFUN(__stextmode, (fd),

       int fd)

{

#ifdef __CYGWIN__

  extern int _cygwin_istext_for_stdio (int);

  return _cygwin_istext_for_stdio (fd);

#else

  return 0;

#endif

}

#endif