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>
18 SM_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
36 static ssize_t
37 sm_eofread __P((
38 SM_FILE_T *fp,
39 char *buf,
40 size_t len));
41
42 /* ARGSUSED0 */
43 static ssize_t
sm_eofread(fp,buf,len)44 sm_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
70 int
71 #if SM_VA_STD
sm_io_sscanf(const char * str,char const * fmt,...)72 sm_io_sscanf(const char *str, char const *fmt, ...)
73 #else /* SM_VA_STD */
74 sm_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