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 #include <sm/gen.h>
16 SM_RCSID("@(#)$Id: sscanf.c,v 1.25 2002/02/01 02:28:00 ca Exp $")
17 #include <string.h>
18 #include <sm/varargs.h>
19 #include <sm/io.h>
20 #include "local.h"
21
22 /*
23 ** SM_EOFREAD -- dummy read function for faked file below
24 **
25 ** Parameters:
26 ** fp -- file pointer
27 ** buf -- location to place read data
28 ** len -- number of bytes to read
29 **
30 ** Returns:
31 ** 0 (zero) always
32 */
33
34 static ssize_t
35 sm_eofread __P((
36 SM_FILE_T *fp,
37 char *buf,
38 size_t len));
39
40 /* ARGSUSED0 */
41 static ssize_t
sm_eofread(fp,buf,len)42 sm_eofread(fp, buf, len)
43 SM_FILE_T *fp;
44 char *buf;
45 size_t len;
46 {
47 return 0;
48 }
49
50 /*
51 ** SM_IO_SSCANF -- scan a string to find data units
52 **
53 ** Parameters:
54 ** str -- strings containing data
55 ** fmt -- format directive for finding data units
56 ** ... -- memory locations to place format found data units
57 **
58 ** Returns:
59 ** Failure: SM_IO_EOF
60 ** Success: number of data units found
61 **
62 ** Side Effects:
63 ** Attempts to strlen() 'str'; if not a '\0' terminated string
64 ** then the call may SEGV/fail.
65 ** Faking the string 'str' as a file.
66 */
67
68 int
69 #if SM_VA_STD
sm_io_sscanf(const char * str,char const * fmt,...)70 sm_io_sscanf(const char *str, char const *fmt, ...)
71 #else /* SM_VA_STD */
72 sm_io_sscanf(str, fmt, va_alist)
73 const char *str;
74 char *fmt;
75 va_dcl
76 #endif /* SM_VA_STD */
77 {
78 int ret;
79 SM_FILE_T fake;
80 SM_VA_LOCAL_DECL
81
82 fake.sm_magic = SmFileMagic;
83 fake.f_flags = SMRD;
84 fake.f_bf.smb_base = fake.f_p = (unsigned char *) str;
85 fake.f_bf.smb_size = fake.f_r = strlen(str);
86 fake.f_file = -1;
87 fake.f_read = sm_eofread;
88 fake.f_write = NULL;
89 fake.f_close = NULL;
90 fake.f_open = NULL;
91 fake.f_seek = NULL;
92 fake.f_setinfo = fake.f_getinfo = NULL;
93 fake.f_type = "sm_io_sscanf:fake";
94 fake.f_flushfp = NULL;
95 fake.f_ub.smb_base = NULL;
96 fake.f_timeout = SM_TIME_FOREVER;
97 fake.f_timeoutstate = SM_TIME_BLOCK;
98 SM_VA_START(ap, fmt);
99 ret = sm_vfscanf(&fake, SM_TIME_FOREVER, fmt, ap);
100 SM_VA_END(ap);
101 return ret;
102 }
103