cde/programs/dtksh/ksh93/src/lib/libast/stdio/stdvbuf.c

   1 /*
   2  * CDE - Common Desktop Environment
   3  *
   4  * Copyright (c) 1993-2012, The Open Group. All rights reserved.
   5  *
   6  * These libraries and programs are free software; you can
   7  * redistribute them and/or modify them under the terms of the GNU
   8  * Lesser General Public License as published by the Free Software
   9  * Foundation; either version 2 of the License, or (at your option)
  10  * any later version.
  11  *
  12  * These libraries and programs are distributed in the hope that
  13  * they will be useful, but WITHOUT ANY WARRANTY; without even the
  14  * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  15  * PURPOSE. See the GNU Lesser General Public License for more
  16  * details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with these librararies and programs; if not, write
  20  * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
  21  * Floor, Boston, MA 02110-1301 USA
  22  */
  23 /* $XConsortium: stdvbuf.c /main/3 1995/11/01 18:40:31 rswiston $ */
  24 /***************************************************************
  25 *                                                              *
  26 *                      AT&T - PROPRIETARY                      *
  27 *                                                              *
  28 *         THIS IS PROPRIETARY SOURCE CODE LICENSED BY          *
  29 *                          AT&T CORP.                          *
  30 *                                                              *
  31 *                Copyright (c) 1995 AT&T Corp.                 *
  32 *                     All Rights Reserved                      *
  33 *                                                              *
  34 *           This software is licensed by AT&T Corp.            *
  35 *       under the terms and conditions of the license in       *
  36 *       http://www.research.att.com/orgs/ssr/book/reuse        *
  37 *                                                              *
  38 *               This software was created by the               *
  39 *           Software Engineering Research Department           *
  40 *                    AT&T Bell Laboratories                    *
  41 *                                                              *
  42 *               For further information contact                *
  43 *                     gsf@research.att.com                     *
  44 *                                                              *
  45 ***************************************************************/
  46 #include        "sfhdr.h"
  47 #include        "stdio.h"
  48
  49 /*      Stdio function setvbuf()
  50 **
  51 **      Written by Kiem-Phong Vo (12/10/90)
  52 */
  53
  54 #if __STD_C
  55 _stdsetvbuf(Sfio_t* f, char *buf, int type, int size)
  56 #else
  57 _stdsetvbuf(f,buf,type,size)
  58 Sfio_t  *f;
  59 char    *buf;
  60 int     type;
  61 int     size;
  62 #endif
  63 {
  64         if(type == _IOLBF)
  65                 sfset(f,SF_LINE,1);
  66         else if((f->flags&SF_STRING))
  67                 return -1;
  68         else if(type == _IONBF)
  69         {       sfsync(f);
  70                 sfsetbuf(f,NIL(Void_t*),0);
  71         }
  72         else if(type == _IOFBF)
  73         {       if(size == 0)
  74                         size = SF_BUFSIZE;
  75                 sfsync(f);
  76                 sfsetbuf(f,(Void_t*)buf,size);
  77         }
  78
  79         return 0;
  80 }