Subversion Repositories openrisc_2011-10-31

/*

 * Copyright (c) 1990 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 MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

 */

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

#include <_ansi.h>

#include <stdio.h>

#include <time.h>

#include <fcntl.h>

#include <errno.h>

#include <sys/types.h>

/*

 * Return the (stdio) flags for a given mode.  Store the flags

 * to be passed to an open() syscall through *optr.

 * Return 0 on error.

 */

int

_DEFUN(__sflags, (ptr, mode, optr),

       struct _reent *ptr  _AND

       register char *mode _AND

       int *optr)

{

  register int ret, m, o;

  switch (mode[0])

    {

    case 'r':                   /* open for reading */

      ret = __SRD;

      m = O_RDONLY;

      o = 0;

      break;

    case 'w':                   /* open for writing */

      ret = __SWR;

      m = O_WRONLY;

      o = O_CREAT | O_TRUNC;

      break;

    case 'a':                   /* open for appending */

      ret = __SWR | __SAPP;

      m = O_WRONLY;

      o = O_CREAT | O_APPEND;

      break;

    default:                    /* illegal mode */

      ptr->_errno = EINVAL;

      return (0);

    }

  if (mode[1] && (mode[1] == '+' || mode[2] == '+'))

    {

      ret = (ret & ~(__SRD | __SWR)) | __SRW;

      m = O_RDWR;

    }

  if (mode[1] && (mode[1] == 'b' || mode[2] == 'b'))

    {

#ifdef O_BINARY

      m |= O_BINARY;

#endif

    }

#ifdef __CYGWIN__

  else if (mode[1] && (mode[1] == 't' || mode[2] == 't'))

#else

  else

#endif

    {

#ifdef O_TEXT

      m |= O_TEXT;

#endif

    }

  *optr = m | o;

  return ret;

}