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[glibc.git] / stdio / vdprintf.c
blob9df4e537bcc1918714b6194c51e030aaa5cf1e25
1 /* Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If
16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
17 Cambridge, MA 02139, USA. */
19 #include <ansidecl.h>
20 #include <errno.h>
21 #include <limits.h>
22 #include <stdarg.h>
23 #include <stdio.h>
24 #include <string.h>
27 /* Write formatted output to file descriptor D according to the format string
28 FORMAT, using the argument list in ARG. */
29 int
30 DEFUN(vdprintf, (d, format, arg),
31 int d AND CONST char *format AND va_list arg)
33 int done;
34 FILE f;
36 /* Create an unbuffered stream talking to D on the stack. */
37 memset ((PTR) &f, 0, sizeof(f));
38 f.__magic = _IOMAGIC;
39 f.__mode.__write = 1;
40 f.__cookie = (PTR) (long int) d; /* Casting to long quiets GCC on Alpha. */
41 f.__room_funcs = __default_room_functions;
42 f.__io_funcs = __default_io_functions;
43 f.__seen = 1;
44 f.__userbuf = 1;
46 /* vfprintf will use a buffer on the stack for the life of the call,
47 and flush it when finished. */
48 done = vfprintf (&f, format, arg);
50 return done;