1 /* FLAGS.C

     2  * 

     3  * Portions Copyright (c) 1990-1999 Nokia Corporation and/or its subsidiary(-ies).

     4  * All rights reserved.

     5  */

     6 

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

     8 

     9 /*

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

    11  * All rights reserved.

    12  *

    13  * Redistribution and use in source and binary forms are permitted

    14  * provided that the above copyright notice and this paragraph are

    15  * duplicated in all such forms and that any documentation,

    16  * advertising materials, and other materials related to such

    17  * distribution and use acknowledge that the software was developed

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

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

    20  * from this software without specific prior written permission.

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

    22  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED

    23  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

    24  */

    25 

    26 #include <stdio_r.h>

    27 #include <time.h>

    28 #include <fcntl.h>

    29 #include "LOCAL.H"

    30 

    31 #include <errno.h>

    32 #include <sys/types.h>

    33 

    34 /*

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

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

    37  * Return 0 on error.

    38  */

    39 

    40 

    41 int __sflags (struct _reent *ptr, const wchar_t *mode, int *optr)

    42 {

    43   register int ret, m, o;

    44 

    45   switch (mode[0])

    46     {

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

    48       ret = __SRD;

    49       m = O_RDONLY;

    50       o = 0;

    51       break;

    52 

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

    54       ret = __SWR;

    55       m = O_WRONLY;

    56       o = O_CREAT | O_TRUNC;

    57       break;

    58 

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

    60       ret = __SWR | __SAPP;

    61       m = O_WRONLY;

    62       o = O_CREAT | O_APPEND;

    63       break;

    64 

    65     default:			/* illegal mode */

    66       ptr->_errno = EINVAL;

    67       return (0);

    68     }

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

    70     {

    71       ret = __SRW;

    72       m = O_RDWR;

    73     }

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

    75     {

    76       m |= O_BINARY;

    77     }

    78   else

    79     {

    80       m |= O_TEXT;

    81     }

    82   *optr = m | o;

    83   return ret;

    84 }