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Commit | Line | Data |
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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 | ||
21 | #define FALSE 0 | |
22 | #define TRUE 1 | |
3ae5396c | 23 | |
5230f605 NTND |
24 | #define CC_EQ(class, len, litmatch) ((len) == sizeof (litmatch)-1 \ |
25 | && *(class) == *(litmatch) \ | |
26 | && strncmp((char*)class, litmatch, len) == 0) | |
27 | ||
28 | #if defined STDC_HEADERS || !defined isascii | |
29 | # define ISASCII(c) 1 | |
30 | #else | |
31 | # define ISASCII(c) isascii(c) | |
32 | #endif | |
33 | ||
34 | #ifdef isblank | |
35 | # define ISBLANK(c) (ISASCII(c) && isblank(c)) | |
36 | #else | |
37 | # define ISBLANK(c) ((c) == ' ' || (c) == '\t') | |
38 | #endif | |
39 | ||
40 | #ifdef isgraph | |
41 | # define ISGRAPH(c) (ISASCII(c) && isgraph(c)) | |
42 | #else | |
43 | # define ISGRAPH(c) (ISASCII(c) && isprint(c) && !isspace(c)) | |
44 | #endif | |
45 | ||
46 | #define ISPRINT(c) (ISASCII(c) && isprint(c)) | |
47 | #define ISDIGIT(c) (ISASCII(c) && isdigit(c)) | |
48 | #define ISALNUM(c) (ISASCII(c) && isalnum(c)) | |
49 | #define ISALPHA(c) (ISASCII(c) && isalpha(c)) | |
50 | #define ISCNTRL(c) (ISASCII(c) && iscntrl(c)) | |
51 | #define ISLOWER(c) (ISASCII(c) && islower(c)) | |
52 | #define ISPUNCT(c) (ISASCII(c) && ispunct(c)) | |
53 | #define ISSPACE(c) (ISASCII(c) && isspace(c)) | |
54 | #define ISUPPER(c) (ISASCII(c) && isupper(c)) | |
55 | #define ISXDIGIT(c) (ISASCII(c) && isxdigit(c)) | |
56 | ||
b0e02876 | 57 | /* Match pattern "p" against "text" */ |
9b4edc0a | 58 | static int dowild(const uchar *p, const uchar *text, int force_lower_case) |
5230f605 | 59 | { |
327f2f3e | 60 | uchar p_ch; |
3a078dec | 61 | const uchar *pattern = p; |
5230f605 | 62 | |
327f2f3e | 63 | for ( ; (p_ch = *p) != '\0'; text++, p++) { |
b6a3d335 | 64 | int matched, match_slash, negated; |
327f2f3e NTND |
65 | uchar t_ch, prev_ch; |
66 | if ((t_ch = *text) == '\0' && p_ch != '*') | |
5230f605 | 67 | return ABORT_ALL; |
327f2f3e NTND |
68 | if (force_lower_case && ISUPPER(t_ch)) |
69 | t_ch = tolower(t_ch); | |
164bf83a NTND |
70 | if (force_lower_case && ISUPPER(p_ch)) |
71 | p_ch = tolower(p_ch); | |
327f2f3e NTND |
72 | switch (p_ch) { |
73 | case '\\': | |
74 | /* Literal match with following character. Note that the test | |
75 | * in "default" handles the p[1] == '\0' failure case. */ | |
5230f605 | 76 | p_ch = *++p; |
327f2f3e NTND |
77 | /* FALLTHROUGH */ |
78 | default: | |
79 | if (t_ch != p_ch) | |
3ae5396c | 80 | return NOMATCH; |
327f2f3e NTND |
81 | continue; |
82 | case '?': | |
83 | /* Match anything but '/'. */ | |
84 | if (t_ch == '/') | |
3ae5396c | 85 | return NOMATCH; |
5230f605 | 86 | continue; |
327f2f3e NTND |
87 | case '*': |
88 | if (*++p == '*') { | |
40bbee0a | 89 | const uchar *prev_p = p - 2; |
327f2f3e | 90 | while (*++p == '*') {} |
3a078dec | 91 | 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] == '/' && | |
104 | dowild(p + 1, text, force_lower_case) == MATCH) | |
105 | return MATCH; | |
b6a3d335 | 106 | match_slash = TRUE; |
40bbee0a NTND |
107 | } else |
108 | return ABORT_MALFORMED; | |
327f2f3e | 109 | } else |
b6a3d335 | 110 | match_slash = FALSE; |
327f2f3e NTND |
111 | if (*p == '\0') { |
112 | /* Trailing "**" matches everything. Trailing "*" matches | |
113 | * only if there are no more slash characters. */ | |
b6a3d335 | 114 | if (!match_slash) { |
327f2f3e | 115 | if (strchr((char*)text, '/') != NULL) |
3ae5396c | 116 | return NOMATCH; |
327f2f3e | 117 | } |
3ae5396c | 118 | return MATCH; |
327f2f3e NTND |
119 | } |
120 | while (1) { | |
121 | if (t_ch == '\0') | |
122 | break; | |
9b4edc0a | 123 | if ((matched = dowild(p, text, force_lower_case)) != NOMATCH) { |
b6a3d335 | 124 | if (!match_slash || matched != ABORT_TO_STARSTAR) |
327f2f3e | 125 | return matched; |
b6a3d335 | 126 | } else if (!match_slash && t_ch == '/') |
327f2f3e NTND |
127 | return ABORT_TO_STARSTAR; |
128 | t_ch = *++text; | |
129 | } | |
5230f605 | 130 | return ABORT_ALL; |
327f2f3e NTND |
131 | case '[': |
132 | p_ch = *++p; | |
133 | #ifdef NEGATE_CLASS2 | |
134 | if (p_ch == NEGATE_CLASS2) | |
135 | p_ch = NEGATE_CLASS; | |
136 | #endif | |
137 | /* Assign literal TRUE/FALSE because of "matched" comparison. */ | |
b6a3d335 NTND |
138 | negated = p_ch == NEGATE_CLASS? TRUE : FALSE; |
139 | if (negated) { | |
327f2f3e NTND |
140 | /* Inverted character class. */ |
141 | p_ch = *++p; | |
142 | } | |
143 | prev_ch = 0; | |
144 | matched = FALSE; | |
145 | do { | |
146 | if (!p_ch) | |
147 | return ABORT_ALL; | |
148 | if (p_ch == '\\') { | |
149 | p_ch = *++p; | |
150 | if (!p_ch) | |
151 | return ABORT_ALL; | |
152 | if (t_ch == p_ch) | |
153 | matched = TRUE; | |
154 | } else if (p_ch == '-' && prev_ch && p[1] && p[1] != ']') { | |
155 | p_ch = *++p; | |
156 | if (p_ch == '\\') { | |
157 | p_ch = *++p; | |
158 | if (!p_ch) | |
159 | return ABORT_ALL; | |
160 | } | |
161 | if (t_ch <= p_ch && t_ch >= prev_ch) | |
162 | matched = TRUE; | |
163 | p_ch = 0; /* This makes "prev_ch" get set to 0. */ | |
164 | } else if (p_ch == '[' && p[1] == ':') { | |
165 | const uchar *s; | |
166 | int i; | |
167 | for (s = p += 2; (p_ch = *p) && p_ch != ']'; p++) {} /*SHARED ITERATOR*/ | |
168 | if (!p_ch) | |
169 | return ABORT_ALL; | |
170 | i = p - s - 1; | |
171 | if (i < 0 || p[-1] != ':') { | |
172 | /* Didn't find ":]", so treat like a normal set. */ | |
173 | p = s - 2; | |
174 | p_ch = '['; | |
175 | if (t_ch == p_ch) | |
176 | matched = TRUE; | |
177 | continue; | |
178 | } | |
179 | if (CC_EQ(s,i, "alnum")) { | |
180 | if (ISALNUM(t_ch)) | |
181 | matched = TRUE; | |
182 | } else if (CC_EQ(s,i, "alpha")) { | |
183 | if (ISALPHA(t_ch)) | |
184 | matched = TRUE; | |
185 | } else if (CC_EQ(s,i, "blank")) { | |
186 | if (ISBLANK(t_ch)) | |
187 | matched = TRUE; | |
188 | } else if (CC_EQ(s,i, "cntrl")) { | |
189 | if (ISCNTRL(t_ch)) | |
190 | matched = TRUE; | |
191 | } else if (CC_EQ(s,i, "digit")) { | |
192 | if (ISDIGIT(t_ch)) | |
193 | matched = TRUE; | |
194 | } else if (CC_EQ(s,i, "graph")) { | |
195 | if (ISGRAPH(t_ch)) | |
196 | matched = TRUE; | |
197 | } else if (CC_EQ(s,i, "lower")) { | |
198 | if (ISLOWER(t_ch)) | |
199 | matched = TRUE; | |
200 | } else if (CC_EQ(s,i, "print")) { | |
201 | if (ISPRINT(t_ch)) | |
202 | matched = TRUE; | |
203 | } else if (CC_EQ(s,i, "punct")) { | |
204 | if (ISPUNCT(t_ch)) | |
205 | matched = TRUE; | |
206 | } else if (CC_EQ(s,i, "space")) { | |
207 | if (ISSPACE(t_ch)) | |
208 | matched = TRUE; | |
209 | } else if (CC_EQ(s,i, "upper")) { | |
210 | if (ISUPPER(t_ch)) | |
211 | matched = TRUE; | |
212 | } else if (CC_EQ(s,i, "xdigit")) { | |
213 | if (ISXDIGIT(t_ch)) | |
214 | matched = TRUE; | |
215 | } else /* malformed [:class:] string */ | |
216 | return ABORT_ALL; | |
217 | p_ch = 0; /* This makes "prev_ch" get set to 0. */ | |
218 | } else if (t_ch == p_ch) | |
219 | matched = TRUE; | |
220 | } while (prev_ch = p_ch, (p_ch = *++p) != ']'); | |
b6a3d335 | 221 | if (matched == negated || t_ch == '/') |
3ae5396c | 222 | return NOMATCH; |
327f2f3e NTND |
223 | continue; |
224 | } | |
5230f605 | 225 | } |
5230f605 | 226 | |
3ae5396c | 227 | return *text ? NOMATCH : MATCH; |
5230f605 NTND |
228 | } |
229 | ||
230 | /* Match the "pattern" against the "text" string. */ | |
9b4edc0a | 231 | int wildmatch(const char *pattern, const char *text, int flags) |
5230f605 | 232 | { |
9b4edc0a NTND |
233 | return dowild((const uchar*)pattern, (const uchar*)text, |
234 | flags & FNM_CASEFOLD ? 1 :0); | |
5230f605 | 235 | } |