1 /* $OpenBSD: regerror.c,v 1.13 2005/08/05 13:03:00 espie Exp $ */
2 /* radare2: pancake 2020 */
3 /*-
4 * Copyright (c) 1992, 1993, 1994 Henry Spencer.
5 * Copyright (c) 1992, 1993, 1994
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Henry Spencer.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)regerror.c 8.4 (Berkeley) 3/20/94
36 */
37
38 #include <sys/types.h>
39 #include <stdio.h>
40 #include <string.h>
41 #include <ctype.h>
42 #include <limits.h>
43 #include <stdlib.h>
44 #include "r_util.h"
45 #include "utils.h"
46
47 static struct rerr {
48 int code;
49 char *name;
50 char *explain;
51 } rerrs[] = {
52 { R_REGEX_NOMATCH, "R_REGEX_NOMATCH", "regexec() failed to match" },
53 { R_REGEX_BADPAT, "R_REGEX_BADPAT", "invalid regular expression" },
54 { R_REGEX_ECOLLATE, "R_REGEX_ECOLLATE", "invalid collating element" },
55 { R_REGEX_ECTYPE, "R_REGEX_ECTYPE", "invalid character class" },
56 { R_REGEX_EESCAPE, "R_REGEX_EESCAPE", "trailing backslash (\\)" },
57 { R_REGEX_ESUBREG, "R_REGEX_ESUBREG", "invalid backreference number" },
58 { R_REGEX_EBRACK, "R_REGEX_EBRACK", "brackets ([ ]) not balanced" },
59 { R_REGEX_EPAREN, "R_REGEX_EPAREN", "parentheses not balanced" },
60 { R_REGEX_EBRACE, "R_REGEX_EBRACE", "braces not balanced" },
61 { R_REGEX_BADBR, "R_REGEX_BADBR", "invalid repetition count(s)" },
62 { R_REGEX_ERANGE, "R_REGEX_ERANGE", "invalid character range" },
63 { R_REGEX_ESPACE, "R_REGEX_ESPACE", "out of memory" },
64 { R_REGEX_BADRPT, "R_REGEX_BADRPT", "repetition-operator operand invalid" },
65 { R_REGEX_EMPTY, "R_REGEX_EMPTY", "empty (sub)expression" },
66 { R_REGEX_ASSERT, "R_REGEX_ASSERT", "\"can't happen\" -- you found a bug" },
67 { R_REGEX_INVARG, "R_REGEX_INVARG", "invalid argument to regex routine" },
68 { 0, "", "*** unknown regexp error code ***" }
69 };
70
71 /*
72 - regatoi - internal routine to implement R_REGEX_ATOI
73 */
regatoi(const RRegex * preg,char * localbuf,size_t localbufsize)74 static char * regatoi(const RRegex *preg, char *localbuf, size_t localbufsize) {
75 struct rerr *r;
76
77 for (r = rerrs; r->code != 0; r++) {
78 if (!strcmp (r->name, preg->re_endp)) {
79 break;
80 }
81 }
82 if (r->code == 0) {
83 return "0";
84 }
85
86 (void)snprintf (localbuf, localbufsize, "%d", r->code);
87 return(localbuf);
88 }
89
90 /*
91 - regerror - the interface to error numbers
92 = extern size_t regerror(int, const regex_t *, char *, size_t);
93 */
r_regex_error(RRegex * rx,int errcode)94 R_API char *r_regex_error(RRegex *rx, int errcode) {
95 size_t errbuf_size = 128;
96 char *errbuf = malloc (errbuf_size);
97 struct rerr *r;
98 int target = errcode &~ R_REGEX_ITOA;
99 char *s;
100 char convbuf[50];
101
102 if (errcode == R_REGEX_ATOI) {
103 s = regatoi (rx, convbuf, sizeof convbuf);
104 } else {
105 for (r = rerrs; r->code != 0; r++) {
106 if (r->code == target) {
107 break;
108 }
109 }
110 if (errcode & R_REGEX_ITOA) {
111 if (r->code != 0) {
112 r_str_ncpy (convbuf, r->name, sizeof (convbuf)-1);
113 } else {
114 snprintf (convbuf, sizeof convbuf, "R_REGEX_0x%x", target);
115 }
116 s = convbuf;
117 } else {
118 s = r->explain;
119 }
120 }
121 if (!R_STR_ISEMPTY (s)) {
122 r_str_ncpy (errbuf, s, errbuf_size - 1);
123 }
124 return errbuf;
125 }
126