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[glibc.git] / stdio / vsscanf.c
blobe037f8c92d5ac7b66d7bc311d87f483b6b71f229
1 /* Copyright (C) 1991, 1992, 1995, 1996, 1997 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 Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the 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 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 02111-1307 USA. */
19 #include <errno.h>
20 #include <stdarg.h>
21 #include <stdio.h>
22 #include <string.h>
24 #undef vsscanf
27 /* Read formatted input from S according to the format
28 string FORMAT, using the argument list in ARG. */
29 int
30 __vsscanf (s, format, arg)
31 const char *s;
32 const char *format;
33 va_list arg;
35 FILE f;
37 if (s == NULL)
39 __set_errno (EINVAL);
40 return -1;
43 memset ((void *) &f, 0, sizeof (f));
44 f.__magic = _IOMAGIC;
45 f.__mode.__read = 1;
46 f.__bufp = f.__buffer = (char *) s;
47 f.__bufsize = strlen(s);
48 f.__get_limit = f.__buffer + f.__bufsize;
49 f.__put_limit = f.__buffer;
50 /* After the buffer is empty (strlen(S) characters have been read),
51 any more read attempts will get EOF. */
52 f.__room_funcs.__input = NULL;
53 f.__seen = 1;
55 return __vfscanf (&f, format, arg);
59 weak_alias (__vsscanf, vsscanf)