cde/programs/dtksh/ksh93/src/lib/libast/sfio/sfprints.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: sfprints.c /main/3 1995/11/01 18:33:30 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
  48 /*      Construct a string with the given format and data.
  49 **      This function allocates space as necessary to store the string.
  50 **      This avoids overflow problems typical with sprintf() in stdio.
  51 **
  52 **      Written by Kiem-Phong Vo (06/27/90)
  53 */
  54
  55 #if __STD_C
  56 char *sfprints(const char *form, ...)
  57 #else
  58 char *sfprints(va_alist)
  59 va_dcl
  60 #endif
  61 {
  62         va_list         args;
  63         reg int         rv;
  64         static Sfio_t   *f;
  65
  66 #if __STD_C
  67         va_start(args,form);
  68 #else
  69         reg char        *form;
  70         va_start(args);
  71         form = va_arg(args,char*);
  72 #endif
  73
  74         /* make a fake stream */
  75         if(!f && !(f = sfnew(NIL(Sfio_t*),NIL(char*),-1,-1,SF_WRITE|SF_STRING)) )
  76                 return NIL(char*);
  77
  78         sfseek(f,0L,0);
  79         rv = sfvprintf(f,form,args);
  80         va_end(args);
  81
  82         if(rv < 0 || sfputc(f,'\0') < 0)
  83                 return NIL(char*);
  84
  85         _Sfi = (f->next - f->data) - 1;
  86         return (char*)f->data;
  87 }