2 ** Do shell-style pattern matching for ?, \, [], and * characters.
5 ** Written by Rich $alz, mirror!rs, Wed Nov 26 19:03:17 EST 1986.
6 ** Rich $alz is now <rsalz@bbn.com>.
8 ** Modified by Wayne Davison to special-case '/' matching, to make '**'
9 ** work differently than '*', and to fix the character-class code.
14 /* What character marks an inverted character class? */
15 #define NEGATE_CLASS '!'
16 #define NEGATE_CLASS2 '^'
21 #define ABORT_TO_STARSTAR -2
23 #define CC_EQ(class, len, litmatch) ((len) == sizeof (litmatch)-1 \
24 && *(class) == *(litmatch) \
25 && strncmp((char*)class, litmatch, len) == 0)
27 #if defined STDC_HEADERS || !defined isascii
30 # define ISASCII(c) isascii(c)
34 # define ISBLANK(c) (ISASCII(c) && isblank(c))
36 # define ISBLANK(c) ((c) == ' ' || (c) == '\t')
40 # define ISGRAPH(c) (ISASCII(c) && isgraph(c))
42 # define ISGRAPH(c) (ISASCII(c) && isprint(c) && !isspace(c))
45 #define ISPRINT(c) (ISASCII(c) && isprint(c))
46 #define ISDIGIT(c) (ISASCII(c) && isdigit(c))
47 #define ISALNUM(c) (ISASCII(c) && isalnum(c))
48 #define ISALPHA(c) (ISASCII(c) && isalpha(c))
49 #define ISCNTRL(c) (ISASCII(c) && iscntrl(c))
50 #define ISLOWER(c) (ISASCII(c) && islower(c))
51 #define ISPUNCT(c) (ISASCII(c) && ispunct(c))
52 #define ISSPACE(c) (ISASCII(c) && isspace(c))
53 #define ISUPPER(c) (ISASCII(c) && isupper(c))
54 #define ISXDIGIT(c) (ISASCII(c) && isxdigit(c))
56 #ifdef WILD_TEST_ITERATIONS
57 int wildmatch_iteration_count;
60 static int force_lower_case = 0;
62 /* Match pattern "p" against the a virtually-joined string consisting
63 * of "text" and any strings in array "a". */
64 static int dowild(const uchar *p, const uchar *text, const uchar*const *a)
68 #ifdef WILD_TEST_ITERATIONS
69 wildmatch_iteration_count++;
72 for ( ; (p_ch = *p) != '\0'; text++, p++) {
75 while ((t_ch = *text) == '\0') {
83 if (force_lower_case && ISUPPER(t_ch))
87 /* Literal match with following character. Note that the test
88 * in "default" handles the p[1] == '\0' failure case. */
96 /* Match anything but '/'. */
102 while (*++p == '*') {}
107 /* Trailing "**" matches everything. Trailing "*" matches
108 * only if there are no more slash characters. */
111 if (strchr((char*)text, '/') != NULL)
113 } while ((text = *a++) != NULL);
119 if ((text = *a++) == NULL)
124 if ((matched = dowild(p, text, a)) != FALSE) {
125 if (!special || matched != ABORT_TO_STARSTAR)
127 } else if (!special && t_ch == '/')
128 return ABORT_TO_STARSTAR;
135 if (p_ch == NEGATE_CLASS2)
138 /* Assign literal TRUE/FALSE because of "matched" comparison. */
139 special = p_ch == NEGATE_CLASS? TRUE : FALSE;
141 /* Inverted character class. */
155 } else if (p_ch == '-' && prev_ch && p[1] && p[1] != ']') {
162 if (t_ch <= p_ch && t_ch >= prev_ch)
164 p_ch = 0; /* This makes "prev_ch" get set to 0. */
165 } else if (p_ch == '[' && p[1] == ':') {
168 for (s = p += 2; (p_ch = *p) && p_ch != ']'; p++) {} /*SHARED ITERATOR*/
172 if (i < 0 || p[-1] != ':') {
173 /* Didn't find ":]", so treat like a normal set. */
180 if (CC_EQ(s,i, "alnum")) {
183 } else if (CC_EQ(s,i, "alpha")) {
186 } else if (CC_EQ(s,i, "blank")) {
189 } else if (CC_EQ(s,i, "cntrl")) {
192 } else if (CC_EQ(s,i, "digit")) {
195 } else if (CC_EQ(s,i, "graph")) {
198 } else if (CC_EQ(s,i, "lower")) {
201 } else if (CC_EQ(s,i, "print")) {
204 } else if (CC_EQ(s,i, "punct")) {
207 } else if (CC_EQ(s,i, "space")) {
210 } else if (CC_EQ(s,i, "upper")) {
213 } else if (CC_EQ(s,i, "xdigit")) {
216 } else /* malformed [:class:] string */
218 p_ch = 0; /* This makes "prev_ch" get set to 0. */
219 } else if (t_ch == p_ch)
221 } while (prev_ch = p_ch, (p_ch = *++p) != ']');
222 if (matched == special || t_ch == '/')
231 } while ((text = *a++) != NULL);
236 /* Match literal string "s" against the a virtually-joined string consisting
237 * of "text" and any strings in array "a". */
238 static int doliteral(const uchar *s, const uchar *text, const uchar*const *a)
240 for ( ; *s != '\0'; text++, s++) {
241 while (*text == '\0') {
242 if ((text = *a++) == NULL)
252 } while ((text = *a++) != NULL);
257 /* Return the last "count" path elements from the concatenated string.
258 * We return a string pointer to the start of the string, and update the
259 * array pointer-pointer to point to any remaining string elements. */
260 static const uchar *trailing_N_elements(const uchar*const **a_ptr, int count)
262 const uchar*const *a = *a_ptr;
263 const uchar*const *first_a = a;
268 while (a != first_a) {
269 const uchar *s = *--a;
270 s += strlen((char*)s);
272 if (*s == '/' && !--count) {
287 /* Match the "pattern" against the "text" string. */
288 int wildmatch(const char *pattern, const char *text)
290 static const uchar *nomore[1]; /* A NULL pointer. */
291 #ifdef WILD_TEST_ITERATIONS
292 wildmatch_iteration_count = 0;
294 return dowild((const uchar*)pattern, (const uchar*)text, nomore) == TRUE;
297 /* Match the "pattern" against the forced-to-lower-case "text" string. */
298 int iwildmatch(const char *pattern, const char *text)
300 static const uchar *nomore[1]; /* A NULL pointer. */
302 #ifdef WILD_TEST_ITERATIONS
303 wildmatch_iteration_count = 0;
305 force_lower_case = 1;
306 ret = dowild((const uchar*)pattern, (const uchar*)text, nomore) == TRUE;
307 force_lower_case = 0;
311 /* Match pattern "p" against the a virtually-joined string consisting
312 * of all the pointers in array "texts" (which has a NULL pointer at the
313 * end). The int "where" can be 0 (normal matching), > 0 (match only
314 * the trailing N slash-separated filename components of "texts"), or < 0
315 * (match the "pattern" at the start or after any slash in "texts"). */
316 int wildmatch_array(const char *pattern, const char*const *texts, int where)
318 const uchar *p = (const uchar*)pattern;
319 const uchar*const *a = (const uchar*const*)texts;
323 #ifdef WILD_TEST_ITERATIONS
324 wildmatch_iteration_count = 0;
328 text = trailing_N_elements(&a, where);
334 if ((matched = dowild(p, text, a)) != TRUE && where < 0
335 && matched != ABORT_ALL) {
338 if ((text = (uchar*)*a++) == NULL)
342 if (*text++ == '/' && (matched = dowild(p, text, a)) != FALSE
343 && matched != ABORT_TO_STARSTAR)
347 return matched == TRUE;
350 /* Match literal string "s" against the a virtually-joined string consisting
351 * of all the pointers in array "texts" (which has a NULL pointer at the
352 * end). The int "where" can be 0 (normal matching), or > 0 (match
353 * only the trailing N slash-separated filename components of "texts"). */
354 int litmatch_array(const char *string, const char*const *texts, int where)
356 const uchar *s = (const uchar*)string;
357 const uchar*const *a = (const uchar* const*)texts;
361 text = trailing_N_elements(&a, where);
367 return doliteral(s, text, a) == TRUE;