text: /*
   * The authors of this software are Rob Pike and Ken Thompson.
   *              Copyright (c) 2002 by Lucent Technologies.
   * Permission to use, copy, modify, and distribute this software for any
   * purpose without fee is hereby granted, provided that this entire notice
   * is included in all copies of any software which is or includes a copy
   * or modification of this software and in all copies of the supporting
   * documentation for such software.
   * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
   * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES MAKE ANY
   * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
   * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
   */
  #include "lib9.h"
  #include "fmtdef.h"
  
  /*
   * generic routine for flushing a formatting buffer
   * to a file descriptor
   */
  int
  _fmtFdFlush(Fmt *f)
  {
  	int n;
  
  	n = (char*)f->to - (char*)f->start;
  	if(n && write((int)f->farg, f->start, n) != n)
  		return 0;
  	f->to = f->start;
  	return 1;
  }
  
  int
  vfprint(int fd, char *fmt, va_list args)
  {
  	Fmt f;
  	char buf[256];
  	int n;
  
  	fmtfdinit(&f, fd, buf, sizeof(buf));
  	va_copy(f.args, args);
  	n = dofmt(&f, fmt);
  	va_end(f.args);
  	if(n > 0 && _fmtFdFlush(&f) == 0)
  		return -1;
  	return n;
  }
  