xref: /illumos-gate/usr/src/contrib/ast/src/lib/libast/tm/tmlex.c (revision b30d193948be5a7794d7ae3ba0ed9c2f72c88e0f)
1 /***********************************************************************
2 *                                                                      *
3 *               This software is part of the ast package               *
4 *          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5 *                      and is licensed under the                       *
6 *                 Eclipse Public License, Version 1.0                  *
7 *                    by AT&T Intellectual Property                     *
8 *                                                                      *
9 *                A copy of the License is available at                 *
10 *          http://www.eclipse.org/org/documents/epl-v10.html           *
11 *         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12 *                                                                      *
13 *              Information and Software Systems Research               *
14 *                            AT&T Research                             *
15 *                           Florham Park NJ                            *
16 *                                                                      *
17 *                 Glenn Fowler <gsf@research.att.com>                  *
18 *                  David Korn <dgk@research.att.com>                   *
19 *                   Phong Vo <kpv@research.att.com>                    *
20 *                                                                      *
21 ***********************************************************************/
22 #pragma prototyped
23 /*
24  * Glenn Fowler
25  * AT&T Bell Laboratories
26  *
27  * time conversion support
28  */
29 
30 #include <ast.h>
31 #include <tm.h>
32 #include <ctype.h>
33 
34 /*
35  * return the tab table index that matches s ignoring case and .'s
36  * tm_data.format checked if tminfo.format!=tm_data.format
37  *
38  * ntab and nsuf are the number of elements in tab and suf,
39  * -1 for 0 sentinel
40  *
41  * all isalpha() chars in str must match
42  * suf is a table of nsuf valid str suffixes
43  * if e is non-null then it will point to first unmatched char in str
44  * which will always be non-isalpha()
45  */
46 
47 int
tmlex(register const char * s,char ** e,char ** tab,int ntab,char ** suf,int nsuf)48 tmlex(register const char* s, char** e, char** tab, int ntab, char** suf, int nsuf)
49 {
50 	register char**	p;
51 	register char*	x;
52 	register int	n;
53 
54 	for (p = tab, n = ntab; n-- && (x = *p); p++)
55 		if (*x && *x != '%' && tmword(s, e, x, suf, nsuf))
56 			return p - tab;
57 	if (tm_info.format != tm_data.format && tab >= tm_info.format && tab < tm_info.format + TM_NFORM)
58 	{
59 		tab = tm_data.format + (tab - tm_info.format);
60 		if (suf && tab >= tm_info.format && tab < tm_info.format + TM_NFORM)
61 			suf = tm_data.format + (suf - tm_info.format);
62 		for (p = tab, n = ntab; n-- && (x = *p); p++)
63 			if (*x && *x != '%' && tmword(s, e, x, suf, nsuf))
64 				return p - tab;
65 	}
66 	return -1;
67 }
68