xref: /freebsd/contrib/bmake/metachar.c (revision cfd6422a5217410fbd66f7a7a8a64d9d85e61229)
1 /*	$NetBSD: metachar.c,v 1.8 2020/10/30 19:14:20 rillig Exp $	*/
2 
3 /*-
4  * Copyright (c) 2015 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Christos Zoulas.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 #if HAVE_NBTOOL_CONFIG_H
33 #include "nbtool_config.h"
34 #endif
35 
36 #if defined(MAKE_NATIVE) || defined(HAVE_NBTOOL_CONFIG_H)
37 #include <sys/cdefs.h>
38 #endif
39 
40 #include "metachar.h"
41 
42 MAKE_RCSID("$NetBSD: metachar.c,v 1.8 2020/10/30 19:14:20 rillig Exp $");
43 
44 /*
45  * The following array is used to make a fast determination of which
46  * characters are interpreted specially by the shell.  If a command
47  * contains any of these characters, it is executed by the shell, not
48  * directly by us.
49  */
50 
51 unsigned char _metachar[128] = {
52 /*    nul   soh   stx   etx   eot   enq   ack   bel */
53 	1,    0,    0,    0,    0,    0,    0,    0,
54 /*     bs    ht    nl    vt    np    cr    so    si */
55 	0,    0,    1,    0,	0,    0,    0,    0,
56 /*    dle   dc1   dc2   dc3   dc4   nak   syn   etb */
57 	0,    0,    0,    0,    0,    0,    0,    0,
58 /*    can    em   sub   esc    fs    gs    rs    us */
59 	0,    0,    0,    0,    0,    0,    0,    0,
60 /*     sp     !     "     #     $     %     &     ' */
61 	0,    1,    1,    1,    1,    0,    1,    1,
62 /*      (     )     *     +     ,     -     .     / */
63 	1,    1,    1,    0,    0,    0,    0,    0,
64 /*      0     1     2     3     4     5     6     7 */
65 	0,    0,    0,    0,    0,    0,    0,    0,
66 /*      8     9     :     ;     <     =     >     ? */
67 	0,    0,    0,    1,    1,    0,    1,    1,
68 /*      @     A     B     C     D     E     F     G */
69 	0,    0,    0,    0,    0,    0,    0,    0,
70 /*      H     I     J     K     L     M     N     O */
71 	0,    0,    0,    0,    0,    0,    0,    0,
72 /*      P     Q     R     S     T     U     V     W */
73 	0,    0,    0,    0,    0,    0,    0,    0,
74 /*      X     Y     Z     [     \     ]     ^     _ */
75 	0,    0,    0,    1,    1,    1,    1,    0,
76 /*      `     a     b     c     d     e     f     g */
77 	1,    0,    0,    0,    0,    0,    0,    0,
78 /*      h     i     j     k     l     m     n     o */
79 	0,    0,    0,    0,    0,    0,    0,    0,
80 /*      p     q     r     s     t     u     v     w */
81 	0,    0,    0,    0,    0,    0,    0,    0,
82 /*      x     y     z     {     |     }     ~   del */
83 	0,    0,    0,    1,    1,    1,    1,    0,
84 };
85 
86