lib/et/vfprintf.c

   1 /*
   2  * Copyright (c) 1988 Regents of the University of California.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms are permitted
   6  * provided that the above copyright notice and this paragraph are
   7  * duplicated in all such forms and that any documentation,
   8  * advertising materials, and other materials related to such
   9  * distribution and use acknowledge that the software was developed
  10  * by the University of California, Berkeley.  The name of the
  11  * University may not be used to endorse or promote products derived
  12  * from this software without specific prior written permission.
  13  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  15  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  16  */
  17
  18 #if defined(LIBC_SCCS) && !defined(lint)
  19 static char sccsid[] = "@(#)vfprintf.c  5.2 (Berkeley) 6/27/88";
  20 #endif /* LIBC_SCCS and not lint */
  21
  22 #include "config.h"
  23 #if !HAVE_VPRINTF && HAVE_DOPRNT
  24 #include <stdio.h>
  25 #include <varargs.h>
  26
  27 int
  28 vfprintf(iop, fmt, ap)
  29         FILE *iop;
  30         char *fmt;
  31         va_list ap;
  32 {
  33         int len;
  34         char localbuf[BUFSIZ];
  35
  36         if (iop->_flag & _IONBF) {
  37                 iop->_flag &= ~_IONBF;
  38                 iop->_ptr = iop->_base = localbuf;
  39                 len = _doprnt(fmt, ap, iop);
  40                 (void) fflush(iop);
  41                 iop->_flag |= _IONBF;
  42                 iop->_base = NULL;
  43                 iop->_bufsiz = 0;
  44                 iop->_cnt = 0;
  45         } else
  46                 len = _doprnt(fmt, ap, iop);
  47
  48         return (ferror(iop) ? EOF : len);
  49 }
  50 #endif /* !HAVE_VPRINTF */