sscanf.c revision 256281 
137985Sphk/*
237985Sphk * Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
337985Sphk *      All rights reserved.
437985Sphk * Copyright (c) 1990, 1993
537985Sphk *	The Regents of the University of California.  All rights reserved.
637985Sphk *
737985Sphk * This code is derived from software contributed to Berkeley by
837985Sphk * Chris Torek.
937985Sphk *
1037985Sphk * By using this file, you agree to the terms and conditions set
1137985Sphk * forth in the LICENSE file which can be found at the top level of
1237985Sphk * the sendmail distribution.
1337985Sphk */
1437985Sphk
1537985Sphk#include <sm/gen.h>
1637985SphkSM_RCSID("@(#)$Id: sscanf.c,v 1.25 2002/02/01 02:28:00 ca Exp $")
1737985Sphk#include <string.h>
1837985Sphk#include <sm/varargs.h>
1937985Sphk#include <sm/io.h>
2037985Sphk#include "local.h"
2137985Sphk
2237985Sphk/*
2337985Sphk**  SM_EOFREAD -- dummy read function for faked file below
2437985Sphk**
2537985Sphk**	Parameters:
2637985Sphk**		fp -- file pointer
2737985Sphk**		buf -- location to place read data
2850476Speter**		len -- number of bytes to read
2948794Snik**
30163983Strhodes**	Returns:
3137985Sphk**		0 (zero) always
3279531Sru*/
3337985Sphk
3437985Sphkstatic ssize_t
3537985Sphksm_eofread __P((
3659501Sphantom	SM_FILE_T *fp,
37124535Sru	char *buf,
3837985Sphk	size_t len));
3984306Sru
4037985Sphk/* ARGSUSED0 */
4138056Sbdestatic ssize_t
4237985Sphksm_eofread(fp, buf, len)
4337985Sphk	SM_FILE_T *fp;
4437985Sphk	char *buf;
4537985Sphk	size_t len;
4637985Sphk{
4737985Sphk	return 0;
4837985Sphk}
4937985Sphk
5037985Sphk/*
5137985Sphk**  SM_IO_SSCANF -- scan a string to find data units
5237985Sphk**
5337985Sphk**	Parameters:
5437985Sphk**		str -- strings containing data
5537985Sphk**		fmt -- format directive for finding data units
5637985Sphk**		... -- memory locations to place format found data units
57110442Scharnier**
5837985Sphk**	Returns:
59110442Scharnier**		Failure: SM_IO_EOF
6037985Sphk**		Success: number of data units found
6137985Sphk**
6237985Sphk**	Side Effects:
6337985Sphk**		Attempts to strlen() 'str'; if not a '\0' terminated string
6437985Sphk**			then the call may SEGV/fail.
6537985Sphk**		Faking the string 'str' as a file.
6637985Sphk*/
6737985Sphk
6837985Sphkint
6977741Sdd#if SM_VA_STD
7077741Sddsm_io_sscanf(const char *str, char const *fmt, ...)
7137985Sphk#else /* SM_VA_STD */
7237985Sphksm_io_sscanf(str, fmt, va_alist)
73163983Strhodes	const char *str;
7438702Swosch	char *fmt;
7537985Sphk	va_dcl
7638702Swosch#endif /* SM_VA_STD */
7737985Sphk{
7838702Swosch	int ret;
7937985Sphk	SM_FILE_T fake;
80110442Scharnier	SM_VA_LOCAL_DECL
8137985Sphk
82110442Scharnier	fake.sm_magic = SmFileMagic;
8373093Sru	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