vprint.c

   1 /* vprint.c -- v[fs]printf() for 4.[23] BSD systems. */
   2
   3 /* Copyright (C) 1987,1989 Free Software Foundation, Inc.
   4
   5 This file is part of GNU Bash, the Bourne Again SHell.
   6
   7 Bash is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 1, or (at your option) any later
  10 version.
  11
  12 Bash is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with Bash; see the file COPYING.  If not, write to the Free Software
  19 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  20
  21 #include "config.h"
  22
  23 #if defined (USE_VFPRINTF_EMULATION)
  24
  25 #include <stdio.h>
  26
  27 #if !defined (NULL)
  28 #  if defined (__STDC__)
  29 #    define NULL ((void *)0)
  30 #  else
  31 #    define NULL 0x0
  32 #  endif /* __STDC__ */
  33 #endif /* !NULL */
  34
  35 /*
  36  * Beware!  Don't trust the value returned by either of these functions; it
  37  * seems that pre-4.3-tahoe implementations of _doprnt () return the first
  38  * argument, i.e. a char *.
  39  */
  40 #include <varargs.h>
  41
  42 int
  43 vfprintf (iop, fmt, ap)
  44      FILE *iop;
  45      char *fmt;
  46      va_list ap;
  47 {
  48   int len;
  49   char localbuf[BUFSIZ];
  50
  51   if (iop->_flag & _IONBF)
  52     {
  53       iop->_flag &= ~_IONBF;
  54       iop->_ptr = iop->_base = localbuf;
  55       len = _doprnt (fmt, ap, iop);
  56       (void) fflush (iop);
  57       iop->_flag |= _IONBF;
  58       iop->_base = NULL;
  59       iop->_bufsiz = 0;
  60       iop->_cnt = 0;
  61     }
  62   else
  63     len = _doprnt (fmt, ap, iop);
  64   return (ferror (iop) ? EOF : len);
  65 }
  66
  67 /*
  68  * Ditto for vsprintf
  69  */
  70 int
  71 vsprintf (str, fmt, ap)
  72      char *str, *fmt;
  73      va_list ap;
  74 {
  75   FILE f;
  76   int len;
  77
  78   f._flag = _IOWRT|_IOSTRG;
  79   f._ptr = str;
  80   f._cnt = 32767;
  81   len = _doprnt (fmt, ap, &f);
  82   *f._ptr = 0;
  83   return (len);
  84 }
  85 #endif /* USE_VFPRINTF_EMULATION */