1/*
2 * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
3 *      All rights reserved.
4 * Copyright (c) 1990, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * Chris Torek.
9 *
10 * By using this file, you agree to the terms and conditions set
11 * forth in the LICENSE file which can be found at the top level of
12 * the sendmail distribution.
13 */
14
15#pragma ident	"%Z%%M%	%I%	%E% SMI"
16
17#include <sm/gen.h>
18SM_RCSID("@(#)$Id: sscanf.c,v 1.25 2002/02/01 02:28:00 ca Exp $")
19#include <string.h>
20#include <sm/varargs.h>
21#include <sm/io.h>
22#include "local.h"
23
24/*
25**  SM_EOFREAD -- dummy read function for faked file below
26**
27**	Parameters:
28**		fp -- file pointer
29**		buf -- location to place read data
30**		len -- number of bytes to read
31**
32**	Returns:
33**		0 (zero) always
34*/
35
36static ssize_t
37sm_eofread __P((
38	SM_FILE_T *fp,
39	char *buf,
40	size_t len));
41
42/* ARGSUSED0 */
43static ssize_t
44sm_eofread(fp, buf, len)
45	SM_FILE_T *fp;
46	char *buf;
47	size_t len;
48{
49	return 0;
50}
51
52/*
53**  SM_IO_SSCANF -- scan a string to find data units
54**
55**	Parameters:
56**		str -- strings containing data
57**		fmt -- format directive for finding data units
58**		... -- memory locations to place format found data units
59**
60**	Returns:
61**		Failure: SM_IO_EOF
62**		Success: number of data units found
63**
64**	Side Effects:
65**		Attempts to strlen() 'str'; if not a '\0' terminated string
66**			then the call may SEGV/fail.
67**		Faking the string 'str' as a file.
68*/
69
70int
71#if SM_VA_STD
72sm_io_sscanf(const char *str, char const *fmt, ...)
73#else /* SM_VA_STD */
74sm_io_sscanf(str, fmt, va_alist)
75	const char *str;
76	char *fmt;
77	va_dcl
78#endif /* SM_VA_STD */
79{
80	int ret;
81	SM_FILE_T fake;
82	SM_VA_LOCAL_DECL
83
84	fake.sm_magic = SmFileMagic;
85	fake.f_flags = SMRD;
86	fake.f_bf.smb_base = fake.f_p = (unsigned char *) str;
87	fake.f_bf.smb_size = fake.f_r = strlen(str);
88	fake.f_file = -1;
89	fake.f_read = sm_eofread;
90	fake.f_write = NULL;
91	fake.f_close = NULL;
92	fake.f_open = NULL;
93	fake.f_seek = NULL;
94	fake.f_setinfo = fake.f_getinfo = NULL;
95	fake.f_type = "sm_io_sscanf:fake";
96	fake.f_flushfp = NULL;
97	fake.f_ub.smb_base = NULL;
98	fake.f_timeout = SM_TIME_FOREVER;
99	fake.f_timeoutstate = SM_TIME_BLOCK;
100	SM_VA_START(ap, fmt);
101	ret = sm_vfscanf(&fake, SM_TIME_FOREVER, fmt, ap);
102	SM_VA_END(ap);
103	return ret;
104}
105