1/*
2** Do shell-style pattern matching for ?, \, [], and * characters.
3** It is 8bit clean.
4**
5** Written by Rich $alz, mirror!rs, Wed Nov 26 19:03:17 EST 1986.
6** Rich $alz is now <rsalz@bbn.com>.
7**
8** Modified by Wayne Davison to special-case '/' matching, to make '**'
9** work differently than '*', and to fix the character-class code.
10*/
11#include "cache.h"
13#include "wildmatch.h"
14typedef unsigned char uchar;
16/* What character marks an inverted character class? */
18#define NEGATE_CLASS '!'
19#define NEGATE_CLASS2 '^'
20#define CC_EQ(class, len, litmatch) ((len) == sizeof (litmatch)-1 \
22 && *(class) == *(litmatch) \
23 && strncmp((char*)class, litmatch, len) == 0)
24#if defined STDC_HEADERS || !defined isascii
26# define ISASCII(c) 1
27#else
28# define ISASCII(c) isascii(c)
29#endif
30#ifdef isblank
32# define ISBLANK(c) (ISASCII(c) && isblank(c))
33#else
34# define ISBLANK(c) ((c) == ' ' || (c) == '\t')
35#endif
36#ifdef isgraph
38# define ISGRAPH(c) (ISASCII(c) && isgraph(c))
39#else
40# define ISGRAPH(c) (ISASCII(c) && isprint(c) && !isspace(c))
41#endif
42#define ISPRINT(c) (ISASCII(c) && isprint(c))
44#define ISDIGIT(c) (ISASCII(c) && isdigit(c))
45#define ISALNUM(c) (ISASCII(c) && isalnum(c))
46#define ISALPHA(c) (ISASCII(c) && isalpha(c))
47#define ISCNTRL(c) (ISASCII(c) && iscntrl(c))
48#define ISLOWER(c) (ISASCII(c) && islower(c))
49#define ISPUNCT(c) (ISASCII(c) && ispunct(c))
50#define ISSPACE(c) (ISASCII(c) && isspace(c))
51#define ISUPPER(c) (ISASCII(c) && isupper(c))
52#define ISXDIGIT(c) (ISASCII(c) && isxdigit(c))
53/* Match pattern "p" against "text" */
55static int dowild(const uchar *p, const uchar *text, unsigned int flags)
56{
57 uchar p_ch;
58 const uchar *pattern = p;
59 for ( ; (p_ch = *p) != '\0'; text++, p++) {
61 int matched, match_slash, negated;
62 uchar t_ch, prev_ch;
63 if ((t_ch = *text) == '\0' && p_ch != '*')
64 return WM_ABORT_ALL;
65 if ((flags & WM_CASEFOLD) && ISUPPER(t_ch))
66 t_ch = tolower(t_ch);
67 if ((flags & WM_CASEFOLD) && ISUPPER(p_ch))
68 p_ch = tolower(p_ch);
69 switch (p_ch) {
70 case '\\':
71 /* Literal match with following character. Note that the test
72 * in "default" handles the p[1] == '\0' failure case. */
73 p_ch = *++p;
74 /* FALLTHROUGH */
75 default:
76 if (t_ch != p_ch)
77 return WM_NOMATCH;
78 continue;
79 case '?':
80 /* Match anything but '/'. */
81 if ((flags & WM_PATHNAME) && t_ch == '/')
82 return WM_NOMATCH;
83 continue;
84 case '*':
85 if (*++p == '*') {
86 const uchar *prev_p = p - 2;
87 while (*++p == '*') {}
88 if (!(flags & WM_PATHNAME))
89 /* without WM_PATHNAME, '*' == '**' */
90 match_slash = 1;
91 else if ((prev_p < pattern || *prev_p == '/') &&
92 (*p == '\0' || *p == '/' ||
93 (p[0] == '\\' && p[1] == '/'))) {
94 /*
95 * Assuming we already match 'foo/' and are at
96 * <star star slash>, just assume it matches
97 * nothing and go ahead match the rest of the
98 * pattern with the remaining string. This
99 * helps make foo/<*><*>/bar (<> because
100 * otherwise it breaks C comment syntax) match
101 * both foo/bar and foo/a/bar.
102 */
103 if (p[0] == '/' &&
104 dowild(p + 1, text, flags) == WM_MATCH)
105 return WM_MATCH;
106 match_slash = 1;
107 } else
108 return WM_ABORT_MALFORMED;
109 } else
110 /* without WM_PATHNAME, '*' == '**' */
111 match_slash = flags & WM_PATHNAME ? 0 : 1;
112 if (*p == '\0') {
113 /* Trailing "**" matches everything. Trailing "*" matches
114 * only if there are no more slash characters. */
115 if (!match_slash) {
116 if (strchr((char*)text, '/') != NULL)
117 return WM_NOMATCH;
118 }
119 return WM_MATCH;
120 } else if (!match_slash && *p == '/') {
121 /*
122 * _one_ asterisk followed by a slash
123 * with WM_PATHNAME matches the next
124 * directory
125 */
126 const char *slash = strchr((char*)text, '/');
127 if (!slash)
128 return WM_NOMATCH;
129 text = (const uchar*)slash;
130 /* the slash is consumed by the top-level for loop */
131 break;
132 }
133 while (1) {
134 if (t_ch == '\0')
135 break;
136 if ((matched = dowild(p, text, flags)) != WM_NOMATCH) {
137 if (!match_slash || matched != WM_ABORT_TO_STARSTAR)
138 return matched;
139 } else if (!match_slash && t_ch == '/')
140 return WM_ABORT_TO_STARSTAR;
141 t_ch = *++text;
142 }
143 return WM_ABORT_ALL;
144 case '[':
145 p_ch = *++p;
146#ifdef NEGATE_CLASS2
147 if (p_ch == NEGATE_CLASS2)
148 p_ch = NEGATE_CLASS;
149#endif
150 /* Assign literal 1/0 because of "matched" comparison. */
151 negated = p_ch == NEGATE_CLASS ? 1 : 0;
152 if (negated) {
153 /* Inverted character class. */
154 p_ch = *++p;
155 }
156 prev_ch = 0;
157 matched = 0;
158 do {
159 if (!p_ch)
160 return WM_ABORT_ALL;
161 if (p_ch == '\\') {
162 p_ch = *++p;
163 if (!p_ch)
164 return WM_ABORT_ALL;
165 if (t_ch == p_ch)
166 matched = 1;
167 } else if (p_ch == '-' && prev_ch && p[1] && p[1] != ']') {
168 p_ch = *++p;
169 if (p_ch == '\\') {
170 p_ch = *++p;
171 if (!p_ch)
172 return WM_ABORT_ALL;
173 }
174 if (t_ch <= p_ch && t_ch >= prev_ch)
175 matched = 1;
176 p_ch = 0; /* This makes "prev_ch" get set to 0. */
177 } else if (p_ch == '[' && p[1] == ':') {
178 const uchar *s;
179 int i;
180 for (s = p += 2; (p_ch = *p) && p_ch != ']'; p++) {} /*SHARED ITERATOR*/
181 if (!p_ch)
182 return WM_ABORT_ALL;
183 i = p - s - 1;
184 if (i < 0 || p[-1] != ':') {
185 /* Didn't find ":]", so treat like a normal set. */
186 p = s - 2;
187 p_ch = '[';
188 if (t_ch == p_ch)
189 matched = 1;
190 continue;
191 }
192 if (CC_EQ(s,i, "alnum")) {
193 if (ISALNUM(t_ch))
194 matched = 1;
195 } else if (CC_EQ(s,i, "alpha")) {
196 if (ISALPHA(t_ch))
197 matched = 1;
198 } else if (CC_EQ(s,i, "blank")) {
199 if (ISBLANK(t_ch))
200 matched = 1;
201 } else if (CC_EQ(s,i, "cntrl")) {
202 if (ISCNTRL(t_ch))
203 matched = 1;
204 } else if (CC_EQ(s,i, "digit")) {
205 if (ISDIGIT(t_ch))
206 matched = 1;
207 } else if (CC_EQ(s,i, "graph")) {
208 if (ISGRAPH(t_ch))
209 matched = 1;
210 } else if (CC_EQ(s,i, "lower")) {
211 if (ISLOWER(t_ch))
212 matched = 1;
213 } else if (CC_EQ(s,i, "print")) {
214 if (ISPRINT(t_ch))
215 matched = 1;
216 } else if (CC_EQ(s,i, "punct")) {
217 if (ISPUNCT(t_ch))
218 matched = 1;
219 } else if (CC_EQ(s,i, "space")) {
220 if (ISSPACE(t_ch))
221 matched = 1;
222 } else if (CC_EQ(s,i, "upper")) {
223 if (ISUPPER(t_ch))
224 matched = 1;
225 } else if (CC_EQ(s,i, "xdigit")) {
226 if (ISXDIGIT(t_ch))
227 matched = 1;
228 } else /* malformed [:class:] string */
229 return WM_ABORT_ALL;
230 p_ch = 0; /* This makes "prev_ch" get set to 0. */
231 } else if (t_ch == p_ch)
232 matched = 1;
233 } while (prev_ch = p_ch, (p_ch = *++p) != ']');
234 if (matched == negated ||
235 ((flags & WM_PATHNAME) && t_ch == '/'))
236 return WM_NOMATCH;
237 continue;
238 }
239 }
240 return *text ? WM_NOMATCH : WM_MATCH;
242}
243/* Match the "pattern" against the "text" string. */
245int wildmatch(const char *pattern, const char *text,
246 unsigned int flags, struct wildopts *wo)
247{
248 return dowild((const uchar*)pattern, (const uchar*)text, flags);
249}