Commit | Line | Data |
---|---|---|
5230f605 NTND |
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 | ||
feabcc17 NTND |
12 | #include "cache.h" |
13 | #include "wildmatch.h" | |
14 | ||
15 | typedef unsigned char uchar; | |
5230f605 NTND |
16 | |
17 | /* What character marks an inverted character class? */ | |
18 | #define NEGATE_CLASS '!' | |
19 | #define NEGATE_CLASS2 '^' | |
20 | ||
5230f605 NTND |
21 | #define CC_EQ(class, len, litmatch) ((len) == sizeof (litmatch)-1 \ |
22 | && *(class) == *(litmatch) \ | |
23 | && strncmp((char*)class, litmatch, len) == 0) | |
24 | ||
25 | #if defined STDC_HEADERS || !defined isascii | |
26 | # define ISASCII(c) 1 | |
27 | #else | |
28 | # define ISASCII(c) isascii(c) | |
29 | #endif | |
30 | ||
31 | #ifdef isblank | |
32 | # define ISBLANK(c) (ISASCII(c) && isblank(c)) | |
33 | #else | |
34 | # define ISBLANK(c) ((c) == ' ' || (c) == '\t') | |
35 | #endif | |
36 | ||
37 | #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 | ||
43 | #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 | ||
b0e02876 | 54 | /* Match pattern "p" against "text" */ |
0c528168 | 55 | static int dowild(const uchar *p, const uchar *text, unsigned int flags) |
5230f605 | 56 | { |
327f2f3e | 57 | uchar p_ch; |
3a078dec | 58 | const uchar *pattern = p; |
5230f605 | 59 | |
327f2f3e | 60 | for ( ; (p_ch = *p) != '\0'; text++, p++) { |
b6a3d335 | 61 | int matched, match_slash, negated; |
327f2f3e NTND |
62 | uchar t_ch, prev_ch; |
63 | if ((t_ch = *text) == '\0' && p_ch != '*') | |
9b3497ca | 64 | return WM_ABORT_ALL; |
0c528168 | 65 | if ((flags & WM_CASEFOLD) && ISUPPER(t_ch)) |
327f2f3e | 66 | t_ch = tolower(t_ch); |
0c528168 | 67 | if ((flags & WM_CASEFOLD) && ISUPPER(p_ch)) |
164bf83a | 68 | p_ch = tolower(p_ch); |
327f2f3e NTND |
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. */ | |
5230f605 | 73 | p_ch = *++p; |
327f2f3e NTND |
74 | /* FALLTHROUGH */ |
75 | default: | |
76 | if (t_ch != p_ch) | |
9b3497ca | 77 | return WM_NOMATCH; |
327f2f3e NTND |
78 | continue; |
79 | case '?': | |
80 | /* Match anything but '/'. */ | |
c41244e7 | 81 | if ((flags & WM_PATHNAME) && t_ch == '/') |
9b3497ca | 82 | return WM_NOMATCH; |
5230f605 | 83 | continue; |
327f2f3e NTND |
84 | case '*': |
85 | if (*++p == '*') { | |
40bbee0a | 86 | const uchar *prev_p = p - 2; |
327f2f3e | 87 | while (*++p == '*') {} |
c41244e7 NTND |
88 | if (!(flags & WM_PATHNAME)) |
89 | /* without WM_PATHNAME, '*' == '**' */ | |
90 | match_slash = 1; | |
91 | else if ((prev_p < pattern || *prev_p == '/') && | |
40bbee0a NTND |
92 | (*p == '\0' || *p == '/' || |
93 | (p[0] == '\\' && p[1] == '/'))) { | |
4c251e5c NTND |
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] == '/' && | |
0c528168 | 104 | dowild(p + 1, text, flags) == WM_MATCH) |
9b3497ca NTND |
105 | return WM_MATCH; |
106 | match_slash = 1; | |
40bbee0a | 107 | } else |
9b3497ca | 108 | return WM_ABORT_MALFORMED; |
327f2f3e | 109 | } else |
c41244e7 NTND |
110 | /* without WM_PATHNAME, '*' == '**' */ |
111 | match_slash = flags & WM_PATHNAME ? 0 : 1; | |
327f2f3e NTND |
112 | if (*p == '\0') { |
113 | /* Trailing "**" matches everything. Trailing "*" matches | |
114 | * only if there are no more slash characters. */ | |
b6a3d335 | 115 | if (!match_slash) { |
327f2f3e | 116 | if (strchr((char*)text, '/') != NULL) |
9b3497ca | 117 | return WM_NOMATCH; |
327f2f3e | 118 | } |
9b3497ca | 119 | return WM_MATCH; |
46983441 NTND |
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; | |
327f2f3e NTND |
132 | } |
133 | while (1) { | |
134 | if (t_ch == '\0') | |
135 | break; | |
6f1a31f0 NTND |
136 | /* |
137 | * Try to advance faster when an asterisk is | |
138 | * followed by a literal. We know in this case | |
832c0e5e | 139 | * that the string before the literal |
6f1a31f0 NTND |
140 | * must belong to "*". |
141 | * If match_slash is false, do not look past | |
142 | * the first slash as it cannot belong to '*'. | |
143 | */ | |
144 | if (!is_glob_special(*p)) { | |
145 | p_ch = *p; | |
146 | if ((flags & WM_CASEFOLD) && ISUPPER(p_ch)) | |
147 | p_ch = tolower(p_ch); | |
148 | while ((t_ch = *text) != '\0' && | |
149 | (match_slash || t_ch != '/')) { | |
150 | if ((flags & WM_CASEFOLD) && ISUPPER(t_ch)) | |
151 | t_ch = tolower(t_ch); | |
152 | if (t_ch == p_ch) | |
153 | break; | |
154 | text++; | |
155 | } | |
156 | if (t_ch != p_ch) | |
157 | return WM_NOMATCH; | |
158 | } | |
0c528168 | 159 | if ((matched = dowild(p, text, flags)) != WM_NOMATCH) { |
9b3497ca | 160 | if (!match_slash || matched != WM_ABORT_TO_STARSTAR) |
327f2f3e | 161 | return matched; |
b6a3d335 | 162 | } else if (!match_slash && t_ch == '/') |
9b3497ca | 163 | return WM_ABORT_TO_STARSTAR; |
327f2f3e NTND |
164 | t_ch = *++text; |
165 | } | |
9b3497ca | 166 | return WM_ABORT_ALL; |
327f2f3e NTND |
167 | case '[': |
168 | p_ch = *++p; | |
169 | #ifdef NEGATE_CLASS2 | |
170 | if (p_ch == NEGATE_CLASS2) | |
171 | p_ch = NEGATE_CLASS; | |
172 | #endif | |
9b3497ca NTND |
173 | /* Assign literal 1/0 because of "matched" comparison. */ |
174 | negated = p_ch == NEGATE_CLASS ? 1 : 0; | |
b6a3d335 | 175 | if (negated) { |
327f2f3e NTND |
176 | /* Inverted character class. */ |
177 | p_ch = *++p; | |
178 | } | |
179 | prev_ch = 0; | |
9b3497ca | 180 | matched = 0; |
327f2f3e NTND |
181 | do { |
182 | if (!p_ch) | |
9b3497ca | 183 | return WM_ABORT_ALL; |
327f2f3e NTND |
184 | if (p_ch == '\\') { |
185 | p_ch = *++p; | |
186 | if (!p_ch) | |
9b3497ca | 187 | return WM_ABORT_ALL; |
327f2f3e | 188 | if (t_ch == p_ch) |
9b3497ca | 189 | matched = 1; |
327f2f3e NTND |
190 | } else if (p_ch == '-' && prev_ch && p[1] && p[1] != ']') { |
191 | p_ch = *++p; | |
192 | if (p_ch == '\\') { | |
193 | p_ch = *++p; | |
194 | if (!p_ch) | |
9b3497ca | 195 | return WM_ABORT_ALL; |
327f2f3e NTND |
196 | } |
197 | if (t_ch <= p_ch && t_ch >= prev_ch) | |
9b3497ca | 198 | matched = 1; |
b79c0c37 AR |
199 | else if ((flags & WM_CASEFOLD) && ISLOWER(t_ch)) { |
200 | uchar t_ch_upper = toupper(t_ch); | |
201 | if (t_ch_upper <= p_ch && t_ch_upper >= prev_ch) | |
202 | matched = 1; | |
203 | } | |
327f2f3e NTND |
204 | p_ch = 0; /* This makes "prev_ch" get set to 0. */ |
205 | } else if (p_ch == '[' && p[1] == ':') { | |
206 | const uchar *s; | |
207 | int i; | |
208 | for (s = p += 2; (p_ch = *p) && p_ch != ']'; p++) {} /*SHARED ITERATOR*/ | |
209 | if (!p_ch) | |
9b3497ca | 210 | return WM_ABORT_ALL; |
327f2f3e NTND |
211 | i = p - s - 1; |
212 | if (i < 0 || p[-1] != ':') { | |
213 | /* Didn't find ":]", so treat like a normal set. */ | |
214 | p = s - 2; | |
215 | p_ch = '['; | |
216 | if (t_ch == p_ch) | |
9b3497ca | 217 | matched = 1; |
327f2f3e NTND |
218 | continue; |
219 | } | |
220 | if (CC_EQ(s,i, "alnum")) { | |
221 | if (ISALNUM(t_ch)) | |
9b3497ca | 222 | matched = 1; |
327f2f3e NTND |
223 | } else if (CC_EQ(s,i, "alpha")) { |
224 | if (ISALPHA(t_ch)) | |
9b3497ca | 225 | matched = 1; |
327f2f3e NTND |
226 | } else if (CC_EQ(s,i, "blank")) { |
227 | if (ISBLANK(t_ch)) | |
9b3497ca | 228 | matched = 1; |
327f2f3e NTND |
229 | } else if (CC_EQ(s,i, "cntrl")) { |
230 | if (ISCNTRL(t_ch)) | |
9b3497ca | 231 | matched = 1; |
327f2f3e NTND |
232 | } else if (CC_EQ(s,i, "digit")) { |
233 | if (ISDIGIT(t_ch)) | |
9b3497ca | 234 | matched = 1; |
327f2f3e NTND |
235 | } else if (CC_EQ(s,i, "graph")) { |
236 | if (ISGRAPH(t_ch)) | |
9b3497ca | 237 | matched = 1; |
327f2f3e NTND |
238 | } else if (CC_EQ(s,i, "lower")) { |
239 | if (ISLOWER(t_ch)) | |
9b3497ca | 240 | matched = 1; |
327f2f3e NTND |
241 | } else if (CC_EQ(s,i, "print")) { |
242 | if (ISPRINT(t_ch)) | |
9b3497ca | 243 | matched = 1; |
327f2f3e NTND |
244 | } else if (CC_EQ(s,i, "punct")) { |
245 | if (ISPUNCT(t_ch)) | |
9b3497ca | 246 | matched = 1; |
327f2f3e NTND |
247 | } else if (CC_EQ(s,i, "space")) { |
248 | if (ISSPACE(t_ch)) | |
9b3497ca | 249 | matched = 1; |
327f2f3e NTND |
250 | } else if (CC_EQ(s,i, "upper")) { |
251 | if (ISUPPER(t_ch)) | |
9b3497ca | 252 | matched = 1; |
b79c0c37 AR |
253 | else if ((flags & WM_CASEFOLD) && ISLOWER(t_ch)) |
254 | matched = 1; | |
327f2f3e NTND |
255 | } else if (CC_EQ(s,i, "xdigit")) { |
256 | if (ISXDIGIT(t_ch)) | |
9b3497ca | 257 | matched = 1; |
327f2f3e | 258 | } else /* malformed [:class:] string */ |
9b3497ca | 259 | return WM_ABORT_ALL; |
327f2f3e NTND |
260 | p_ch = 0; /* This makes "prev_ch" get set to 0. */ |
261 | } else if (t_ch == p_ch) | |
9b3497ca | 262 | matched = 1; |
327f2f3e | 263 | } while (prev_ch = p_ch, (p_ch = *++p) != ']'); |
c41244e7 NTND |
264 | if (matched == negated || |
265 | ((flags & WM_PATHNAME) && t_ch == '/')) | |
9b3497ca | 266 | return WM_NOMATCH; |
327f2f3e NTND |
267 | continue; |
268 | } | |
5230f605 | 269 | } |
5230f605 | 270 | |
9b3497ca | 271 | return *text ? WM_NOMATCH : WM_MATCH; |
5230f605 NTND |
272 | } |
273 | ||
274 | /* Match the "pattern" against the "text" string. */ | |
9b3497ca NTND |
275 | int wildmatch(const char *pattern, const char *text, |
276 | unsigned int flags, struct wildopts *wo) | |
5230f605 | 277 | { |
0c528168 | 278 | return dowild((const uchar*)pattern, (const uchar*)text, flags); |
5230f605 | 279 | } |