github.com/roboticscm/goman@v0.0.0-20210203095141-87c07b4a0a55/src/lib9/fmt/vfprint.c (about)

     1  /*
     2   * The authors of this software are Rob Pike and Ken Thompson,
     3   * with contributions from Mike Burrows and Sean Dorward.
     4   *
     5   *     Copyright (c) 2002-2006 by Lucent Technologies.
     6   *     Portions Copyright (c) 2004 Google Inc.
     7   * 
     8   * Permission to use, copy, modify, and distribute this software for any
     9   * purpose without fee is hereby granted, provided that this entire notice
    10   * is included in all copies of any software which is or includes a copy
    11   * or modification of this software and in all copies of the supporting
    12   * documentation for such software.
    13   * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
    14   * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR LUCENT TECHNOLOGIES 
    15   * NOR GOOGLE INC MAKE ANY REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING 
    16   * THE MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
    17   */
    18  
    19  #include <u.h>
    20  #include <libc.h>
    21  #include "fmtdef.h"
    22  
    23  int
    24  vfprint(int fd, char *fmt, va_list args)
    25  {
    26  	Fmt f;
    27  	char buf[256];
    28  	int n;
    29  
    30  	fmtfdinit(&f, fd, buf, sizeof(buf));
    31  	VA_COPY(f.args,args);
    32  	n = dofmt(&f, fmt);
    33  	VA_END(f.args);
    34  	if(n > 0 && __fmtFdFlush(&f) == 0)
    35  		return -1;
    36  	return n;
    37  }