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1.13 ! schwarze 1: /* $Id: mansearch.c,v 1.12 2014/01/19 23:09:13 schwarze Exp $ */
1.1 schwarze 2: /*
3: * Copyright (c) 2012 Kristaps Dzonsons <kristaps@bsd.lv>
1.4 schwarze 4: * Copyright (c) 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
1.1 schwarze 5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18: #include <assert.h>
19: #include <fcntl.h>
20: #include <getopt.h>
21: #include <limits.h>
22: #include <regex.h>
23: #include <stdio.h>
24: #include <stdint.h>
25: #include <stddef.h>
26: #include <stdlib.h>
27: #include <string.h>
28: #include <unistd.h>
29:
30: #include <ohash.h>
31: #include <sqlite3.h>
32:
33: #include "mandoc.h"
34: #include "manpath.h"
35: #include "mansearch.h"
36:
1.11 schwarze 37: extern int mansearch_keymax;
38: extern const char *const mansearch_keynames[];
39:
1.1 schwarze 40: #define SQL_BIND_TEXT(_db, _s, _i, _v) \
41: do { if (SQLITE_OK != sqlite3_bind_text \
42: ((_s), (_i)++, (_v), -1, SQLITE_STATIC)) \
43: fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
44: } while (0)
45: #define SQL_BIND_INT64(_db, _s, _i, _v) \
46: do { if (SQLITE_OK != sqlite3_bind_int64 \
47: ((_s), (_i)++, (_v))) \
48: fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
49: } while (0)
50: #define SQL_BIND_BLOB(_db, _s, _i, _v) \
51: do { if (SQLITE_OK != sqlite3_bind_blob \
52: ((_s), (_i)++, (&_v), sizeof(_v), SQLITE_STATIC)) \
53: fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
54: } while (0)
55:
56: struct expr {
57: uint64_t bits; /* type-mask */
58: const char *substr; /* to search for, if applicable */
59: regex_t regexp; /* compiled regexp, if applicable */
1.4 schwarze 60: int open; /* opening parentheses before */
61: int and; /* logical AND before */
62: int close; /* closing parentheses after */
1.1 schwarze 63: struct expr *next; /* next in sequence */
64: };
65:
66: struct match {
67: uint64_t id; /* identifier in database */
68: int form; /* 0 == catpage */
69: };
70:
1.8 schwarze 71: static void buildnames(struct manpage *, sqlite3 *,
1.10 schwarze 72: sqlite3_stmt *, uint64_t,
73: const char *, int form);
1.3 schwarze 74: static char *buildoutput(sqlite3 *, sqlite3_stmt *,
75: uint64_t, uint64_t);
1.1 schwarze 76: static void *hash_alloc(size_t, void *);
77: static void hash_free(void *, size_t, void *);
78: static void *hash_halloc(size_t, void *);
79: static struct expr *exprcomp(const struct mansearch *,
80: int, char *[]);
81: static void exprfree(struct expr *);
1.6 schwarze 82: static struct expr *exprspec(struct expr *, uint64_t,
83: const char *, const char *);
1.1 schwarze 84: static struct expr *exprterm(const struct mansearch *, char *, int);
1.4 schwarze 85: static void sql_append(char **sql, size_t *sz,
86: const char *newstr, int count);
1.1 schwarze 87: static void sql_match(sqlite3_context *context,
88: int argc, sqlite3_value **argv);
89: static void sql_regexp(sqlite3_context *context,
90: int argc, sqlite3_value **argv);
1.6 schwarze 91: static char *sql_statement(const struct expr *);
1.1 schwarze 92:
93: int
94: mansearch(const struct mansearch *search,
1.3 schwarze 95: const struct manpaths *paths,
96: int argc, char *argv[],
97: const char *outkey,
1.1 schwarze 98: struct manpage **res, size_t *sz)
99: {
1.11 schwarze 100: int fd, rc, c, indexbit;
1.1 schwarze 101: int64_t id;
1.11 schwarze 102: uint64_t outbit, iterbit;
1.1 schwarze 103: char buf[PATH_MAX];
1.2 schwarze 104: char *sql;
1.1 schwarze 105: struct manpage *mpage;
106: struct expr *e, *ep;
107: sqlite3 *db;
1.3 schwarze 108: sqlite3_stmt *s, *s2;
1.1 schwarze 109: struct match *mp;
110: struct ohash_info info;
111: struct ohash htab;
112: unsigned int idx;
113: size_t i, j, cur, maxres;
114:
115: memset(&info, 0, sizeof(struct ohash_info));
116:
117: info.halloc = hash_halloc;
118: info.alloc = hash_alloc;
119: info.hfree = hash_free;
120: info.key_offset = offsetof(struct match, id);
121:
122: *sz = cur = maxres = 0;
123: sql = NULL;
124: *res = NULL;
125: fd = -1;
126: e = NULL;
127: rc = 0;
128:
129: if (0 == argc)
130: goto out;
131: if (NULL == (e = exprcomp(search, argc, argv)))
132: goto out;
133:
1.3 schwarze 134: outbit = 0;
135: if (NULL != outkey) {
1.11 schwarze 136: for (indexbit = 0, iterbit = 1;
137: indexbit < mansearch_keymax;
138: indexbit++, iterbit <<= 1) {
139: if (0 == strcasecmp(outkey,
140: mansearch_keynames[indexbit])) {
141: outbit = iterbit;
1.3 schwarze 142: break;
143: }
144: }
145: }
146:
1.1 schwarze 147: /*
148: * Save a descriptor to the current working directory.
149: * Since pathnames in the "paths" variable might be relative,
150: * and we'll be chdir()ing into them, we need to keep a handle
151: * on our current directory from which to start the chdir().
152: */
153:
154: if (NULL == getcwd(buf, PATH_MAX)) {
155: perror(NULL);
156: goto out;
157: } else if (-1 == (fd = open(buf, O_RDONLY, 0))) {
158: perror(buf);
159: goto out;
160: }
161:
1.6 schwarze 162: sql = sql_statement(e);
1.1 schwarze 163:
164: /*
165: * Loop over the directories (containing databases) for us to
166: * search.
167: * Don't let missing/bad databases/directories phase us.
168: * In each, try to open the resident database and, if it opens,
169: * scan it for our match expression.
170: */
171:
172: for (i = 0; i < paths->sz; i++) {
173: if (-1 == fchdir(fd)) {
174: perror(buf);
175: free(*res);
176: break;
177: } else if (-1 == chdir(paths->paths[i])) {
178: perror(paths->paths[i]);
179: continue;
180: }
181:
182: c = sqlite3_open_v2
183: (MANDOC_DB, &db,
184: SQLITE_OPEN_READONLY, NULL);
185:
186: if (SQLITE_OK != c) {
187: perror(MANDOC_DB);
188: sqlite3_close(db);
189: continue;
190: }
191:
192: /*
193: * Define the SQL functions for substring
194: * and regular expression matching.
195: */
196:
197: c = sqlite3_create_function(db, "match", 2,
198: SQLITE_ANY, NULL, sql_match, NULL, NULL);
199: assert(SQLITE_OK == c);
200: c = sqlite3_create_function(db, "regexp", 2,
201: SQLITE_ANY, NULL, sql_regexp, NULL, NULL);
202: assert(SQLITE_OK == c);
203:
204: j = 1;
205: c = sqlite3_prepare_v2(db, sql, -1, &s, NULL);
206: if (SQLITE_OK != c)
207: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
208:
209: for (ep = e; NULL != ep; ep = ep->next) {
210: if (NULL == ep->substr) {
211: SQL_BIND_BLOB(db, s, j, ep->regexp);
212: } else
213: SQL_BIND_TEXT(db, s, j, ep->substr);
214: SQL_BIND_INT64(db, s, j, ep->bits);
215: }
216:
217: memset(&htab, 0, sizeof(struct ohash));
218: ohash_init(&htab, 4, &info);
219:
220: /*
221: * Hash each entry on its [unique] document identifier.
222: * This is a uint64_t.
223: * Instead of using a hash function, simply convert the
224: * uint64_t to a uint32_t, the hash value's type.
225: * This gives good performance and preserves the
226: * distribution of buckets in the table.
227: */
228: while (SQLITE_ROW == (c = sqlite3_step(s))) {
1.9 schwarze 229: id = sqlite3_column_int64(s, 1);
1.1 schwarze 230: idx = ohash_lookup_memory
231: (&htab, (char *)&id,
232: sizeof(uint64_t), (uint32_t)id);
233:
234: if (NULL != ohash_find(&htab, idx))
235: continue;
236:
237: mp = mandoc_calloc(1, sizeof(struct match));
238: mp->id = id;
1.9 schwarze 239: mp->form = sqlite3_column_int(s, 0);
1.1 schwarze 240: ohash_insert(&htab, idx, mp);
241: }
242:
243: if (SQLITE_DONE != c)
244: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
245:
246: sqlite3_finalize(s);
247:
248: c = sqlite3_prepare_v2(db,
1.13 ! schwarze 249: "SELECT * FROM mlinks WHERE pageid=?"
! 250: " ORDER BY sec, arch, name",
1.1 schwarze 251: -1, &s, NULL);
252: if (SQLITE_OK != c)
253: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
254:
1.3 schwarze 255: c = sqlite3_prepare_v2(db,
256: "SELECT * FROM keys WHERE pageid=? AND bits & ?",
257: -1, &s2, NULL);
258: if (SQLITE_OK != c)
259: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
260:
1.1 schwarze 261: for (mp = ohash_first(&htab, &idx);
262: NULL != mp;
263: mp = ohash_next(&htab, &idx)) {
264: if (cur + 1 > maxres) {
265: maxres += 1024;
266: *res = mandoc_realloc
267: (*res, maxres * sizeof(struct manpage));
268: }
269: mpage = *res + cur;
270: mpage->form = mp->form;
1.10 schwarze 271: buildnames(mpage, db, s, mp->id,
272: paths->paths[i], mp->form);
1.3 schwarze 273: mpage->output = outbit ?
274: buildoutput(db, s2, mp->id, outbit) : NULL;
1.1 schwarze 275:
276: free(mp);
277: cur++;
278: }
279:
280: sqlite3_finalize(s);
1.3 schwarze 281: sqlite3_finalize(s2);
1.1 schwarze 282: sqlite3_close(db);
283: ohash_delete(&htab);
284: }
285: rc = 1;
286: out:
287: exprfree(e);
288: if (-1 != fd)
289: close(fd);
290: free(sql);
291: *sz = cur;
292: return(rc);
1.2 schwarze 293: }
294:
1.8 schwarze 295: static void
296: buildnames(struct manpage *mpage, sqlite3 *db, sqlite3_stmt *s,
1.10 schwarze 297: uint64_t id, const char *path, int form)
1.2 schwarze 298: {
1.13 ! schwarze 299: char *newnames, *prevsec, *prevarch;
1.10 schwarze 300: const char *oldnames, *sep1, *name, *sec, *sep2, *arch, *fsec;
1.2 schwarze 301: size_t i;
302: int c;
303:
1.8 schwarze 304: mpage->names = NULL;
1.13 ! schwarze 305: prevsec = prevarch = NULL;
1.2 schwarze 306: i = 1;
307: SQL_BIND_INT64(db, s, i, id);
308: while (SQLITE_ROW == (c = sqlite3_step(s))) {
1.8 schwarze 309:
1.13 ! schwarze 310: /* Decide whether we already have some names. */
1.8 schwarze 311:
312: if (NULL == mpage->names) {
1.2 schwarze 313: oldnames = "";
314: sep1 = "";
315: } else {
1.8 schwarze 316: oldnames = mpage->names;
1.2 schwarze 317: sep1 = ", ";
318: }
1.13 ! schwarze 319:
! 320: /* Fetch the next name. */
! 321:
1.10 schwarze 322: sec = sqlite3_column_text(s, 0);
323: arch = sqlite3_column_text(s, 1);
324: name = sqlite3_column_text(s, 2);
1.13 ! schwarze 325:
! 326: /* If the section changed, append the old one. */
! 327:
! 328: if (NULL != prevsec &&
! 329: (strcmp(sec, prevsec) ||
! 330: strcmp(arch, prevarch))) {
! 331: sep2 = '\0' == *prevarch ? "" : "/";
! 332: if (-1 == asprintf(&newnames, "%s(%s%s%s)",
! 333: oldnames, prevsec, sep2, prevarch)) {
! 334: perror(0);
! 335: exit((int)MANDOCLEVEL_SYSERR);
! 336: }
! 337: free(mpage->names);
! 338: oldnames = mpage->names = newnames;
! 339: free(prevsec);
! 340: free(prevarch);
! 341: prevsec = prevarch = NULL;
! 342: }
! 343:
! 344: /* Save the new section, to append it later. */
! 345:
! 346: if (NULL == prevsec) {
! 347: prevsec = mandoc_strdup(sec);
! 348: prevarch = mandoc_strdup(arch);
! 349: }
! 350:
! 351: /* Append the new name. */
! 352:
! 353: if (-1 == asprintf(&newnames, "%s%s%s",
! 354: oldnames, sep1, name)) {
1.2 schwarze 355: perror(0);
356: exit((int)MANDOCLEVEL_SYSERR);
357: }
1.8 schwarze 358: free(mpage->names);
359: mpage->names = newnames;
360:
361: /* Also save the first file name encountered. */
362:
363: if (NULL != mpage->file)
364: continue;
365:
1.10 schwarze 366: if (form) {
367: sep1 = "man";
368: fsec = sec;
369: } else {
370: sep1 = "cat";
371: fsec = "0";
372: }
1.13 ! schwarze 373: sep2 = '\0' == *arch ? "" : "/";
1.10 schwarze 374: if (-1 == asprintf(&mpage->file, "%s/%s%s%s%s/%s.%s",
375: path, sep1, sec, sep2, arch, name, fsec)) {
1.8 schwarze 376: perror(0);
377: exit((int)MANDOCLEVEL_SYSERR);
378: }
1.2 schwarze 379: }
380: if (SQLITE_DONE != c)
381: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
382: sqlite3_reset(s);
1.13 ! schwarze 383:
! 384: /* Append one final section to the names. */
! 385:
! 386: if (NULL != prevsec) {
! 387: sep2 = '\0' == *prevarch ? "" : "/";
! 388: if (-1 == asprintf(&newnames, "%s(%s%s%s)",
! 389: mpage->names, prevsec, sep2, prevarch)) {
! 390: perror(0);
! 391: exit((int)MANDOCLEVEL_SYSERR);
! 392: }
! 393: free(mpage->names);
! 394: mpage->names = newnames;
! 395: free(prevsec);
! 396: free(prevarch);
! 397: }
1.3 schwarze 398: }
399:
400: static char *
401: buildoutput(sqlite3 *db, sqlite3_stmt *s, uint64_t id, uint64_t outbit)
402: {
403: char *output, *newoutput;
404: const char *oldoutput, *sep1, *data;
405: size_t i;
406: int c;
407:
408: output = NULL;
409: i = 1;
410: SQL_BIND_INT64(db, s, i, id);
411: SQL_BIND_INT64(db, s, i, outbit);
412: while (SQLITE_ROW == (c = sqlite3_step(s))) {
413: if (NULL == output) {
414: oldoutput = "";
415: sep1 = "";
416: } else {
417: oldoutput = output;
418: sep1 = " # ";
419: }
420: data = sqlite3_column_text(s, 1);
421: if (-1 == asprintf(&newoutput, "%s%s%s",
422: oldoutput, sep1, data)) {
423: perror(0);
424: exit((int)MANDOCLEVEL_SYSERR);
425: }
426: free(output);
427: output = newoutput;
428: }
429: if (SQLITE_DONE != c)
430: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
431: sqlite3_reset(s);
432: return(output);
1.1 schwarze 433: }
434:
435: /*
436: * Implement substring match as an application-defined SQL function.
437: * Using the SQL LIKE or GLOB operators instead would be a bad idea
438: * because that would require escaping metacharacters in the string
439: * being searched for.
440: */
441: static void
442: sql_match(sqlite3_context *context, int argc, sqlite3_value **argv)
443: {
444:
445: assert(2 == argc);
446: sqlite3_result_int(context, NULL != strcasestr(
447: (const char *)sqlite3_value_text(argv[1]),
448: (const char *)sqlite3_value_text(argv[0])));
449: }
450:
451: /*
452: * Implement regular expression match
453: * as an application-defined SQL function.
454: */
455: static void
456: sql_regexp(sqlite3_context *context, int argc, sqlite3_value **argv)
457: {
458:
459: assert(2 == argc);
460: sqlite3_result_int(context, !regexec(
461: (regex_t *)sqlite3_value_blob(argv[0]),
462: (const char *)sqlite3_value_text(argv[1]),
463: 0, NULL, 0));
464: }
465:
1.4 schwarze 466: static void
467: sql_append(char **sql, size_t *sz, const char *newstr, int count)
468: {
469: size_t newsz;
470:
471: newsz = 1 < count ? (size_t)count : strlen(newstr);
472: *sql = mandoc_realloc(*sql, *sz + newsz + 1);
473: if (1 < count)
474: memset(*sql + *sz, *newstr, (size_t)count);
475: else
476: memcpy(*sql + *sz, newstr, newsz);
477: *sz += newsz;
478: (*sql)[*sz] = '\0';
479: }
480:
1.1 schwarze 481: /*
482: * Prepare the search SQL statement.
483: */
484: static char *
1.6 schwarze 485: sql_statement(const struct expr *e)
1.1 schwarze 486: {
487: char *sql;
488: size_t sz;
1.4 schwarze 489: int needop;
1.1 schwarze 490:
1.4 schwarze 491: sql = mandoc_strdup("SELECT * FROM mpages WHERE ");
1.1 schwarze 492: sz = strlen(sql);
493:
1.4 schwarze 494: for (needop = 0; NULL != e; e = e->next) {
495: if (e->and)
496: sql_append(&sql, &sz, " AND ", 1);
497: else if (needop)
498: sql_append(&sql, &sz, " OR ", 1);
499: if (e->open)
500: sql_append(&sql, &sz, "(", e->open);
501: sql_append(&sql, &sz, NULL == e->substr ?
502: "id IN (SELECT pageid FROM keys "
503: "WHERE key REGEXP ? AND bits & ?)" :
504: "id IN (SELECT pageid FROM keys "
505: "WHERE key MATCH ? AND bits & ?)", 1);
506: if (e->close)
507: sql_append(&sql, &sz, ")", e->close);
508: needop = 1;
1.1 schwarze 509: }
510:
511: return(sql);
512: }
513:
514: /*
515: * Compile a set of string tokens into an expression.
516: * Tokens in "argv" are assumed to be individual expression atoms (e.g.,
517: * "(", "foo=bar", etc.).
518: */
519: static struct expr *
520: exprcomp(const struct mansearch *search, int argc, char *argv[])
521: {
1.4 schwarze 522: int i, toopen, logic, igncase, toclose;
1.1 schwarze 523: struct expr *first, *next, *cur;
524:
525: first = cur = NULL;
1.6 schwarze 526: logic = igncase = toclose = 0;
527: toopen = 1;
1.1 schwarze 528:
529: for (i = 0; i < argc; i++) {
1.4 schwarze 530: if (0 == strcmp("(", argv[i])) {
531: if (igncase)
532: goto fail;
533: toopen++;
534: toclose++;
535: continue;
536: } else if (0 == strcmp(")", argv[i])) {
537: if (toopen || logic || igncase || NULL == cur)
538: goto fail;
539: cur->close++;
540: if (0 > --toclose)
541: goto fail;
542: continue;
543: } else if (0 == strcmp("-a", argv[i])) {
544: if (toopen || logic || igncase || NULL == cur)
545: goto fail;
546: logic = 1;
547: continue;
548: } else if (0 == strcmp("-o", argv[i])) {
549: if (toopen || logic || igncase || NULL == cur)
550: goto fail;
551: logic = 2;
552: continue;
553: } else if (0 == strcmp("-i", argv[i])) {
554: if (igncase)
555: goto fail;
556: igncase = 1;
557: continue;
1.1 schwarze 558: }
1.4 schwarze 559: next = exprterm(search, argv[i], !igncase);
560: if (NULL == next)
561: goto fail;
562: next->open = toopen;
563: next->and = (1 == logic);
1.1 schwarze 564: if (NULL != first) {
565: cur->next = next;
566: cur = next;
567: } else
568: cur = first = next;
1.4 schwarze 569: toopen = logic = igncase = 0;
1.1 schwarze 570: }
1.6 schwarze 571: if (toopen || logic || igncase || toclose)
572: goto fail;
573:
574: cur->close++;
575: cur = exprspec(cur, TYPE_arch, search->arch, "^(%s|any)$");
576: exprspec(cur, TYPE_sec, search->sec, "^%s$");
577:
578: return(first);
579:
1.4 schwarze 580: fail:
581: if (NULL != first)
582: exprfree(first);
583: return(NULL);
1.1 schwarze 584: }
585:
586: static struct expr *
1.6 schwarze 587: exprspec(struct expr *cur, uint64_t key, const char *value,
588: const char *format)
589: {
590: char errbuf[BUFSIZ];
591: char *cp;
592: int irc;
593:
594: if (NULL == value)
595: return(cur);
596:
597: if (-1 == asprintf(&cp, format, value)) {
598: perror(0);
599: exit((int)MANDOCLEVEL_SYSERR);
600: }
601: cur->next = mandoc_calloc(1, sizeof(struct expr));
602: cur = cur->next;
603: cur->and = 1;
604: cur->bits = key;
605: if (0 != (irc = regcomp(&cur->regexp, cp,
606: REG_EXTENDED | REG_NOSUB | REG_ICASE))) {
607: regerror(irc, &cur->regexp, errbuf, sizeof(errbuf));
608: fprintf(stderr, "regcomp: %s\n", errbuf);
609: cur->substr = value;
610: }
611: free(cp);
612: return(cur);
613: }
614:
615: static struct expr *
1.1 schwarze 616: exprterm(const struct mansearch *search, char *buf, int cs)
617: {
1.6 schwarze 618: char errbuf[BUFSIZ];
1.1 schwarze 619: struct expr *e;
620: char *key, *v;
1.11 schwarze 621: uint64_t iterbit;
622: int i, irc;
1.1 schwarze 623:
624: if ('\0' == *buf)
625: return(NULL);
626:
627: e = mandoc_calloc(1, sizeof(struct expr));
628:
629: /*"whatis" mode uses an opaque string and default fields. */
630:
631: if (MANSEARCH_WHATIS & search->flags) {
632: e->substr = buf;
633: e->bits = search->deftype;
634: return(e);
635: }
636:
637: /*
638: * If no =~ is specified, search with equality over names and
639: * descriptions.
640: * If =~ begins the phrase, use name and description fields.
641: */
642:
643: if (NULL == (v = strpbrk(buf, "=~"))) {
644: e->substr = buf;
645: e->bits = search->deftype;
646: return(e);
647: } else if (v == buf)
648: e->bits = search->deftype;
649:
650: if ('~' == *v++) {
1.12 schwarze 651: if (NULL != strstr(buf, "arch"))
652: cs = 0;
1.6 schwarze 653: if (0 != (irc = regcomp(&e->regexp, v,
654: REG_EXTENDED | REG_NOSUB | (cs ? 0 : REG_ICASE)))) {
655: regerror(irc, &e->regexp, errbuf, sizeof(errbuf));
656: fprintf(stderr, "regcomp: %s\n", errbuf);
1.1 schwarze 657: free(e);
658: return(NULL);
659: }
660: } else
661: e->substr = v;
662: v[-1] = '\0';
663:
664: /*
665: * Parse out all possible fields.
666: * If the field doesn't resolve, bail.
667: */
668:
669: while (NULL != (key = strsep(&buf, ","))) {
670: if ('\0' == *key)
671: continue;
1.11 schwarze 672: for (i = 0, iterbit = 1;
673: i < mansearch_keymax;
674: i++, iterbit <<= 1) {
675: if (0 == strcasecmp(key,
676: mansearch_keynames[i])) {
677: e->bits |= iterbit;
678: break;
679: }
680: }
681: if (i == mansearch_keymax) {
682: if (strcasecmp(key, "any")) {
683: free(e);
684: return(NULL);
685: }
686: e->bits |= ~0ULL;
1.1 schwarze 687: }
688: }
689:
690: return(e);
691: }
692:
693: static void
694: exprfree(struct expr *p)
695: {
696: struct expr *pp;
697:
698: while (NULL != p) {
699: pp = p->next;
700: free(p);
701: p = pp;
702: }
703: }
704:
705: static void *
706: hash_halloc(size_t sz, void *arg)
707: {
708:
709: return(mandoc_calloc(sz, 1));
710: }
711:
712: static void *
713: hash_alloc(size_t sz, void *arg)
714: {
715:
716: return(mandoc_malloc(sz));
717: }
718:
719: static void
720: hash_free(void *p, size_t sz, void *arg)
721: {
722:
723: free(p);
724: }