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:
12: #include "rsync.h"
13:
14: /* What character marks an inverted character class? */
15: #define NEGATE_CLASS '!'
16: #define NEGATE_CLASS2 '^'
17:
18: #define FALSE 0
19: #define TRUE 1
20: #define ABORT_ALL -1
21: #define ABORT_TO_STARSTAR -2
22:
23: #define CC_EQ(class, len, litmatch) ((len) == sizeof (litmatch)-1 \
24: && *(class) == *(litmatch) \
25: && strncmp((char*)class, litmatch, len) == 0)
26:
27: #if defined STDC_HEADERS || !defined isascii
28: # define ISASCII(c) 1
29: #else
30: # define ISASCII(c) isascii(c)
31: #endif
32:
33: #ifdef isblank
34: # define ISBLANK(c) (ISASCII(c) && isblank(c))
35: #else
36: # define ISBLANK(c) ((c) == ' ' || (c) == '\t')
37: #endif
38:
39: #ifdef isgraph
40: # define ISGRAPH(c) (ISASCII(c) && isgraph(c))
41: #else
42: # define ISGRAPH(c) (ISASCII(c) && isprint(c) && !isspace(c))
43: #endif
44:
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))
55:
56: #ifdef WILD_TEST_ITERATIONS
57: int wildmatch_iteration_count;
58: #endif
59:
60: static int force_lower_case = 0;
61:
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)
65: {
66: uchar p_ch;
67:
68: #ifdef WILD_TEST_ITERATIONS
69: wildmatch_iteration_count++;
70: #endif
71:
72: for ( ; (p_ch = *p) != '\0'; text++, p++) {
73: int matched, special;
74: uchar t_ch, prev_ch;
75: while ((t_ch = *text) == '\0') {
76: if (*a == NULL) {
77: if (p_ch != '*')
78: return ABORT_ALL;
79: break;
80: }
81: text = *a++;
82: }
83: if (force_lower_case && ISUPPER(t_ch))
84: t_ch = tolower(t_ch);
85: switch (p_ch) {
86: case '\\':
87: /* Literal match with following character. Note that the test
88: * in "default" handles the p[1] == '\0' failure case. */
89: p_ch = *++p;
90: /* FALLTHROUGH */
91: default:
92: if (t_ch != p_ch)
93: return FALSE;
94: continue;
95: case '?':
96: /* Match anything but '/'. */
97: if (t_ch == '/')
98: return FALSE;
99: continue;
100: case '*':
101: if (*++p == '*') {
102: while (*++p == '*') {}
103: special = TRUE;
104: } else
105: special = FALSE;
106: if (*p == '\0') {
107: /* Trailing "**" matches everything. Trailing "*" matches
108: * only if there are no more slash characters. */
109: if (!special) {
110: do {
111: if (strchr((char*)text, '/') != NULL)
112: return FALSE;
113: } while ((text = *a++) != NULL);
114: }
115: return TRUE;
116: }
117: while (1) {
118: if (t_ch == '\0') {
119: if ((text = *a++) == NULL)
120: break;
121: t_ch = *text;
122: continue;
123: }
124: if ((matched = dowild(p, text, a)) != FALSE) {
125: if (!special || matched != ABORT_TO_STARSTAR)
126: return matched;
127: } else if (!special && t_ch == '/')
128: return ABORT_TO_STARSTAR;
129: t_ch = *++text;
130: }
131: return ABORT_ALL;
132: case '[':
133: p_ch = *++p;
134: #ifdef NEGATE_CLASS2
135: if (p_ch == NEGATE_CLASS2)
136: p_ch = NEGATE_CLASS;
137: #endif
138: /* Assign literal TRUE/FALSE because of "matched" comparison. */
139: special = p_ch == NEGATE_CLASS? TRUE : FALSE;
140: if (special) {
141: /* Inverted character class. */
142: p_ch = *++p;
143: }
144: prev_ch = 0;
145: matched = FALSE;
146: do {
147: if (!p_ch)
148: return ABORT_ALL;
149: if (p_ch == '\\') {
150: p_ch = *++p;
151: if (!p_ch)
152: return ABORT_ALL;
153: if (t_ch == p_ch)
154: matched = TRUE;
155: } else if (p_ch == '-' && prev_ch && p[1] && p[1] != ']') {
156: p_ch = *++p;
157: if (p_ch == '\\') {
158: p_ch = *++p;
159: if (!p_ch)
160: return ABORT_ALL;
161: }
162: if (t_ch <= p_ch && t_ch >= prev_ch)
163: matched = TRUE;
164: p_ch = 0; /* This makes "prev_ch" get set to 0. */
165: } else if (p_ch == '[' && p[1] == ':') {
166: const uchar *s;
167: int i;
168: for (s = p += 2; (p_ch = *p) && p_ch != ']'; p++) {} /*SHARED ITERATOR*/
169: if (!p_ch)
170: return ABORT_ALL;
171: i = p - s - 1;
172: if (i < 0 || p[-1] != ':') {
173: /* Didn't find ":]", so treat like a normal set. */
174: p = s - 2;
175: p_ch = '[';
176: if (t_ch == p_ch)
177: matched = TRUE;
178: continue;
179: }
180: if (CC_EQ(s,i, "alnum")) {
181: if (ISALNUM(t_ch))
182: matched = TRUE;
183: } else if (CC_EQ(s,i, "alpha")) {
184: if (ISALPHA(t_ch))
185: matched = TRUE;
186: } else if (CC_EQ(s,i, "blank")) {
187: if (ISBLANK(t_ch))
188: matched = TRUE;
189: } else if (CC_EQ(s,i, "cntrl")) {
190: if (ISCNTRL(t_ch))
191: matched = TRUE;
192: } else if (CC_EQ(s,i, "digit")) {
193: if (ISDIGIT(t_ch))
194: matched = TRUE;
195: } else if (CC_EQ(s,i, "graph")) {
196: if (ISGRAPH(t_ch))
197: matched = TRUE;
198: } else if (CC_EQ(s,i, "lower")) {
199: if (ISLOWER(t_ch))
200: matched = TRUE;
201: } else if (CC_EQ(s,i, "print")) {
202: if (ISPRINT(t_ch))
203: matched = TRUE;
204: } else if (CC_EQ(s,i, "punct")) {
205: if (ISPUNCT(t_ch))
206: matched = TRUE;
207: } else if (CC_EQ(s,i, "space")) {
208: if (ISSPACE(t_ch))
209: matched = TRUE;
210: } else if (CC_EQ(s,i, "upper")) {
211: if (ISUPPER(t_ch))
212: matched = TRUE;
213: } else if (CC_EQ(s,i, "xdigit")) {
214: if (ISXDIGIT(t_ch))
215: matched = TRUE;
216: } else /* malformed [:class:] string */
217: return ABORT_ALL;
218: p_ch = 0; /* This makes "prev_ch" get set to 0. */
219: } else if (t_ch == p_ch)
220: matched = TRUE;
221: } while (prev_ch = p_ch, (p_ch = *++p) != ']');
222: if (matched == special || t_ch == '/')
223: return FALSE;
224: continue;
225: }
226: }
227:
228: do {
229: if (*text)
230: return FALSE;
231: } while ((text = *a++) != NULL);
232:
233: return TRUE;
234: }
235:
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)
239: {
240: for ( ; *s != '\0'; text++, s++) {
241: while (*text == '\0') {
242: if ((text = *a++) == NULL)
243: return FALSE;
244: }
245: if (*text != *s)
246: return FALSE;
247: }
248:
249: do {
250: if (*text)
251: return FALSE;
252: } while ((text = *a++) != NULL);
253:
254: return TRUE;
255: }
256:
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)
261: {
262: const uchar*const *a = *a_ptr;
263: const uchar*const *first_a = a;
264:
265: while (*a)
266: a++;
267:
268: while (a != first_a) {
269: const uchar *s = *--a;
270: s += strlen((char*)s);
271: while (--s >= *a) {
272: if (*s == '/' && !--count) {
273: *a_ptr = a+1;
274: return s+1;
275: }
276: }
277: }
278:
279: if (count == 1) {
280: *a_ptr = a+1;
281: return *a;
282: }
283:
284: return NULL;
285: }
286:
287: /* Match the "pattern" against the "text" string. */
288: int wildmatch(const char *pattern, const char *text)
289: {
290: static const uchar *nomore[1]; /* A NULL pointer. */
291: #ifdef WILD_TEST_ITERATIONS
292: wildmatch_iteration_count = 0;
293: #endif
294: return dowild((const uchar*)pattern, (const uchar*)text, nomore) == TRUE;
295: }
296:
297: /* Match the "pattern" against the forced-to-lower-case "text" string. */
298: int iwildmatch(const char *pattern, const char *text)
299: {
300: static const uchar *nomore[1]; /* A NULL pointer. */
301: int ret;
302: #ifdef WILD_TEST_ITERATIONS
303: wildmatch_iteration_count = 0;
304: #endif
305: force_lower_case = 1;
306: ret = dowild((const uchar*)pattern, (const uchar*)text, nomore) == TRUE;
307: force_lower_case = 0;
308: return ret;
309: }
310:
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)
317: {
318: const uchar *p = (const uchar*)pattern;
319: const uchar*const *a = (const uchar*const*)texts;
320: const uchar *text;
321: int matched;
322:
323: #ifdef WILD_TEST_ITERATIONS
324: wildmatch_iteration_count = 0;
325: #endif
326:
327: if (where > 0)
328: text = trailing_N_elements(&a, where);
329: else
330: text = *a++;
331: if (!text)
332: return FALSE;
333:
334: if ((matched = dowild(p, text, a)) != TRUE && where < 0
335: && matched != ABORT_ALL) {
336: while (1) {
337: if (*text == '\0') {
338: if ((text = (uchar*)*a++) == NULL)
339: return FALSE;
340: continue;
341: }
342: if (*text++ == '/' && (matched = dowild(p, text, a)) != FALSE
343: && matched != ABORT_TO_STARSTAR)
344: break;
345: }
346: }
347: return matched == TRUE;
348: }
349:
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)
355: {
356: const uchar *s = (const uchar*)string;
357: const uchar*const *a = (const uchar* const*)texts;
358: const uchar *text;
359:
360: if (where > 0)
361: text = trailing_N_elements(&a, where);
362: else
363: text = *a++;
364: if (!text)
365: return FALSE;
366:
367: return doliteral(s, text, a) == TRUE;
368: }
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