Annotation of mandoc/mansearch.c, Revision 1.13
1.13 ! schwarze 1: /* $Id: mansearch.c,v 1.12 2013/12/31 03:41:14 schwarze Exp $ */
1.1 kristaps 2: /*
3: * Copyright (c) 2012 Kristaps Dzonsons <kristaps@bsd.lv>
1.13 ! schwarze 4: * Copyright (c) 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 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: #ifdef HAVE_CONFIG_H
19: #include "config.h"
20: #endif
21:
22: #include <assert.h>
23: #include <fcntl.h>
24: #include <getopt.h>
1.6 schwarze 25: #include <limits.h>
1.8 schwarze 26: #include <regex.h>
1.1 kristaps 27: #include <stdio.h>
28: #include <stdint.h>
29: #include <stddef.h>
30: #include <stdlib.h>
31: #include <string.h>
32: #include <unistd.h>
33:
1.4 kristaps 34: #ifdef HAVE_OHASH
1.1 kristaps 35: #include <ohash.h>
1.4 kristaps 36: #else
37: #include "compat_ohash.h"
38: #endif
1.1 kristaps 39: #include <sqlite3.h>
40:
41: #include "mandoc.h"
42: #include "manpath.h"
43: #include "mansearch.h"
44:
1.3 kristaps 45: #define SQL_BIND_TEXT(_db, _s, _i, _v) \
1.8 schwarze 46: do { if (SQLITE_OK != sqlite3_bind_text \
1.2 kristaps 47: ((_s), (_i)++, (_v), -1, SQLITE_STATIC)) \
1.8 schwarze 48: fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
49: } while (0)
1.3 kristaps 50: #define SQL_BIND_INT64(_db, _s, _i, _v) \
1.8 schwarze 51: do { if (SQLITE_OK != sqlite3_bind_int64 \
1.2 kristaps 52: ((_s), (_i)++, (_v))) \
1.8 schwarze 53: fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
54: } while (0)
55: #define SQL_BIND_BLOB(_db, _s, _i, _v) \
56: do { if (SQLITE_OK != sqlite3_bind_blob \
57: ((_s), (_i)++, (&_v), sizeof(_v), SQLITE_STATIC)) \
58: fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
59: } while (0)
1.2 kristaps 60:
1.1 kristaps 61: struct expr {
1.8 schwarze 62: uint64_t bits; /* type-mask */
63: const char *substr; /* to search for, if applicable */
64: regex_t regexp; /* compiled regexp, if applicable */
1.13 ! schwarze 65: int open; /* opening parentheses before */
! 66: int and; /* logical AND before */
! 67: int close; /* closing parentheses after */
1.8 schwarze 68: struct expr *next; /* next in sequence */
1.1 kristaps 69: };
70:
71: struct match {
72: uint64_t id; /* identifier in database */
73: char *file; /* relative filepath of manpage */
74: char *desc; /* description of manpage */
75: int form; /* 0 == catpage */
76: };
77:
78: struct type {
79: uint64_t bits;
80: const char *name;
81: };
82:
83: static const struct type types[] = {
84: { TYPE_An, "An" },
85: { TYPE_Ar, "Ar" },
86: { TYPE_At, "At" },
87: { TYPE_Bsx, "Bsx" },
88: { TYPE_Bx, "Bx" },
89: { TYPE_Cd, "Cd" },
90: { TYPE_Cm, "Cm" },
91: { TYPE_Dv, "Dv" },
92: { TYPE_Dx, "Dx" },
93: { TYPE_Em, "Em" },
94: { TYPE_Er, "Er" },
95: { TYPE_Ev, "Ev" },
96: { TYPE_Fa, "Fa" },
97: { TYPE_Fl, "Fl" },
98: { TYPE_Fn, "Fn" },
99: { TYPE_Fn, "Fo" },
100: { TYPE_Ft, "Ft" },
101: { TYPE_Fx, "Fx" },
102: { TYPE_Ic, "Ic" },
103: { TYPE_In, "In" },
104: { TYPE_Lb, "Lb" },
105: { TYPE_Li, "Li" },
106: { TYPE_Lk, "Lk" },
107: { TYPE_Ms, "Ms" },
108: { TYPE_Mt, "Mt" },
109: { TYPE_Nd, "Nd" },
110: { TYPE_Nm, "Nm" },
111: { TYPE_Nx, "Nx" },
112: { TYPE_Ox, "Ox" },
113: { TYPE_Pa, "Pa" },
114: { TYPE_Rs, "Rs" },
115: { TYPE_Sh, "Sh" },
116: { TYPE_Ss, "Ss" },
117: { TYPE_St, "St" },
118: { TYPE_Sy, "Sy" },
119: { TYPE_Tn, "Tn" },
120: { TYPE_Va, "Va" },
121: { TYPE_Va, "Vt" },
122: { TYPE_Xr, "Xr" },
123: { ~0ULL, "any" },
124: { 0ULL, NULL }
125: };
126:
1.11 schwarze 127: static char *buildnames(sqlite3 *, sqlite3_stmt *, uint64_t);
1.12 schwarze 128: static char *buildoutput(sqlite3 *, sqlite3_stmt *,
129: uint64_t, uint64_t);
1.1 kristaps 130: static void *hash_alloc(size_t, void *);
131: static void hash_free(void *, size_t, void *);
132: static void *hash_halloc(size_t, void *);
1.5 kristaps 133: static struct expr *exprcomp(const struct mansearch *,
134: int, char *[]);
1.1 kristaps 135: static void exprfree(struct expr *);
1.8 schwarze 136: static struct expr *exprterm(const struct mansearch *, char *, int);
1.13 ! schwarze 137: static void sql_append(char **sql, size_t *sz,
! 138: const char *newstr, int count);
1.7 schwarze 139: static void sql_match(sqlite3_context *context,
140: int argc, sqlite3_value **argv);
1.8 schwarze 141: static void sql_regexp(sqlite3_context *context,
142: int argc, sqlite3_value **argv);
1.1 kristaps 143: static char *sql_statement(const struct expr *,
144: const char *, const char *);
145:
146: int
1.5 kristaps 147: mansearch(const struct mansearch *search,
1.12 schwarze 148: const struct manpaths *paths,
149: int argc, char *argv[],
150: const char *outkey,
1.1 kristaps 151: struct manpage **res, size_t *sz)
152: {
1.12 schwarze 153: int fd, rc, c, ibit;
1.1 kristaps 154: int64_t id;
1.12 schwarze 155: uint64_t outbit;
1.6 schwarze 156: char buf[PATH_MAX];
1.11 schwarze 157: char *sql;
1.10 schwarze 158: struct manpage *mpage;
1.1 kristaps 159: struct expr *e, *ep;
160: sqlite3 *db;
1.12 schwarze 161: sqlite3_stmt *s, *s2;
1.1 kristaps 162: struct match *mp;
163: struct ohash_info info;
164: struct ohash htab;
165: unsigned int idx;
166: size_t i, j, cur, maxres;
167:
168: memset(&info, 0, sizeof(struct ohash_info));
169:
170: info.halloc = hash_halloc;
171: info.alloc = hash_alloc;
172: info.hfree = hash_free;
173: info.key_offset = offsetof(struct match, id);
174:
1.2 kristaps 175: *sz = cur = maxres = 0;
1.1 kristaps 176: sql = NULL;
177: *res = NULL;
178: fd = -1;
179: e = NULL;
1.2 kristaps 180: rc = 0;
1.1 kristaps 181:
182: if (0 == argc)
183: goto out;
1.5 kristaps 184: if (NULL == (e = exprcomp(search, argc, argv)))
1.1 kristaps 185: goto out;
186:
1.12 schwarze 187: outbit = 0;
188: if (NULL != outkey) {
189: for (ibit = 0; types[ibit].bits; ibit++) {
190: if (0 == strcasecmp(types[ibit].name, outkey)) {
191: outbit = types[ibit].bits;
192: break;
193: }
194: }
195: }
196:
1.1 kristaps 197: /*
198: * Save a descriptor to the current working directory.
199: * Since pathnames in the "paths" variable might be relative,
200: * and we'll be chdir()ing into them, we need to keep a handle
201: * on our current directory from which to start the chdir().
202: */
203:
1.6 schwarze 204: if (NULL == getcwd(buf, PATH_MAX)) {
1.1 kristaps 205: perror(NULL);
206: goto out;
207: } else if (-1 == (fd = open(buf, O_RDONLY, 0))) {
208: perror(buf);
209: goto out;
210: }
211:
1.5 kristaps 212: sql = sql_statement(e, search->arch, search->sec);
1.1 kristaps 213:
214: /*
215: * Loop over the directories (containing databases) for us to
216: * search.
217: * Don't let missing/bad databases/directories phase us.
218: * In each, try to open the resident database and, if it opens,
219: * scan it for our match expression.
220: */
221:
222: for (i = 0; i < paths->sz; i++) {
223: if (-1 == fchdir(fd)) {
224: perror(buf);
225: free(*res);
226: break;
227: } else if (-1 == chdir(paths->paths[i])) {
228: perror(paths->paths[i]);
229: continue;
230: }
231:
1.2 kristaps 232: c = sqlite3_open_v2
233: (MANDOC_DB, &db,
234: SQLITE_OPEN_READONLY, NULL);
1.1 kristaps 235:
1.2 kristaps 236: if (SQLITE_OK != c) {
1.1 kristaps 237: perror(MANDOC_DB);
238: sqlite3_close(db);
239: continue;
240: }
241:
1.8 schwarze 242: /*
243: * Define the SQL functions for substring
244: * and regular expression matching.
245: */
1.7 schwarze 246:
247: c = sqlite3_create_function(db, "match", 2,
248: SQLITE_ANY, NULL, sql_match, NULL, NULL);
1.8 schwarze 249: assert(SQLITE_OK == c);
250: c = sqlite3_create_function(db, "regexp", 2,
251: SQLITE_ANY, NULL, sql_regexp, NULL, NULL);
252: assert(SQLITE_OK == c);
1.7 schwarze 253:
1.1 kristaps 254: j = 1;
1.2 kristaps 255: c = sqlite3_prepare_v2(db, sql, -1, &s, NULL);
256: if (SQLITE_OK != c)
257: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
1.1 kristaps 258:
1.5 kristaps 259: if (NULL != search->arch)
260: SQL_BIND_TEXT(db, s, j, search->arch);
261: if (NULL != search->sec)
262: SQL_BIND_TEXT(db, s, j, search->sec);
1.1 kristaps 263:
264: for (ep = e; NULL != ep; ep = ep->next) {
1.8 schwarze 265: if (NULL == ep->substr) {
266: SQL_BIND_BLOB(db, s, j, ep->regexp);
267: } else
268: SQL_BIND_TEXT(db, s, j, ep->substr);
1.3 kristaps 269: SQL_BIND_INT64(db, s, j, ep->bits);
1.1 kristaps 270: }
271:
272: memset(&htab, 0, sizeof(struct ohash));
273: ohash_init(&htab, 4, &info);
274:
275: /*
276: * Hash each entry on its [unique] document identifier.
277: * This is a uint64_t.
278: * Instead of using a hash function, simply convert the
279: * uint64_t to a uint32_t, the hash value's type.
280: * This gives good performance and preserves the
281: * distribution of buckets in the table.
282: */
1.2 kristaps 283: while (SQLITE_ROW == (c = sqlite3_step(s))) {
1.13 ! schwarze 284: id = sqlite3_column_int64(s, 5);
1.1 kristaps 285: idx = ohash_lookup_memory
286: (&htab, (char *)&id,
287: sizeof(uint64_t), (uint32_t)id);
288:
289: if (NULL != ohash_find(&htab, idx))
290: continue;
291:
292: mp = mandoc_calloc(1, sizeof(struct match));
293: mp->id = id;
294: mp->file = mandoc_strdup
1.13 ! schwarze 295: ((char *)sqlite3_column_text(s, 0));
! 296: mp->desc = mandoc_strdup
1.1 kristaps 297: ((char *)sqlite3_column_text(s, 3));
1.13 ! schwarze 298: mp->form = sqlite3_column_int(s, 4);
1.1 kristaps 299: ohash_insert(&htab, idx, mp);
300: }
301:
1.2 kristaps 302: if (SQLITE_DONE != c)
303: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
304:
1.1 kristaps 305: sqlite3_finalize(s);
1.10 schwarze 306:
307: c = sqlite3_prepare_v2(db,
308: "SELECT * FROM mlinks WHERE pageid=?",
309: -1, &s, NULL);
310: if (SQLITE_OK != c)
311: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
1.1 kristaps 312:
1.12 schwarze 313: c = sqlite3_prepare_v2(db,
314: "SELECT * FROM keys WHERE pageid=? AND bits & ?",
315: -1, &s2, NULL);
316: if (SQLITE_OK != c)
317: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
318:
1.1 kristaps 319: for (mp = ohash_first(&htab, &idx);
320: NULL != mp;
321: mp = ohash_next(&htab, &idx)) {
322: if (cur + 1 > maxres) {
323: maxres += 1024;
324: *res = mandoc_realloc
325: (*res, maxres * sizeof(struct manpage));
326: }
1.10 schwarze 327: mpage = *res + cur;
328: if (-1 == asprintf(&mpage->file, "%s/%s",
329: paths->paths[i], mp->file)) {
330: perror(0);
331: exit((int)MANDOCLEVEL_SYSERR);
332: }
333: mpage->desc = mp->desc;
334: mpage->form = mp->form;
1.11 schwarze 335: mpage->names = buildnames(db, s, mp->id);
1.12 schwarze 336: mpage->output = outbit ?
337: buildoutput(db, s2, mp->id, outbit) : NULL;
1.10 schwarze 338:
1.1 kristaps 339: free(mp->file);
340: free(mp);
341: cur++;
342: }
1.10 schwarze 343:
344: sqlite3_finalize(s);
1.12 schwarze 345: sqlite3_finalize(s2);
1.10 schwarze 346: sqlite3_close(db);
1.1 kristaps 347: ohash_delete(&htab);
348: }
1.2 kristaps 349: rc = 1;
1.1 kristaps 350: out:
351: exprfree(e);
352: if (-1 != fd)
353: close(fd);
354: free(sql);
355: *sz = cur;
1.2 kristaps 356: return(rc);
1.11 schwarze 357: }
358:
359: static char *
360: buildnames(sqlite3 *db, sqlite3_stmt *s, uint64_t id)
361: {
362: char *names, *newnames;
363: const char *oldnames, *sep1, *name, *sec, *sep2, *arch;
364: size_t i;
365: int c;
366:
367: names = NULL;
368: i = 1;
369: SQL_BIND_INT64(db, s, i, id);
370: while (SQLITE_ROW == (c = sqlite3_step(s))) {
371: if (NULL == names) {
372: oldnames = "";
373: sep1 = "";
374: } else {
375: oldnames = names;
376: sep1 = ", ";
377: }
378: sec = sqlite3_column_text(s, 1);
379: arch = sqlite3_column_text(s, 2);
380: name = sqlite3_column_text(s, 3);
381: sep2 = '\0' == *arch ? "" : "/";
382: if (-1 == asprintf(&newnames, "%s%s%s(%s%s%s)",
383: oldnames, sep1, name, sec, sep2, arch)) {
384: perror(0);
385: exit((int)MANDOCLEVEL_SYSERR);
386: }
387: free(names);
388: names = newnames;
389: }
390: if (SQLITE_DONE != c)
391: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
392: sqlite3_reset(s);
393: return(names);
1.12 schwarze 394: }
395:
396: static char *
397: buildoutput(sqlite3 *db, sqlite3_stmt *s, uint64_t id, uint64_t outbit)
398: {
399: char *output, *newoutput;
400: const char *oldoutput, *sep1, *data;
401: size_t i;
402: int c;
403:
404: output = NULL;
405: i = 1;
406: SQL_BIND_INT64(db, s, i, id);
407: SQL_BIND_INT64(db, s, i, outbit);
408: while (SQLITE_ROW == (c = sqlite3_step(s))) {
409: if (NULL == output) {
410: oldoutput = "";
411: sep1 = "";
412: } else {
413: oldoutput = output;
414: sep1 = " # ";
415: }
416: data = sqlite3_column_text(s, 1);
417: if (-1 == asprintf(&newoutput, "%s%s%s",
418: oldoutput, sep1, data)) {
419: perror(0);
420: exit((int)MANDOCLEVEL_SYSERR);
421: }
422: free(output);
423: output = newoutput;
424: }
425: if (SQLITE_DONE != c)
426: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
427: sqlite3_reset(s);
428: return(output);
1.1 kristaps 429: }
430:
431: /*
1.7 schwarze 432: * Implement substring match as an application-defined SQL function.
433: * Using the SQL LIKE or GLOB operators instead would be a bad idea
434: * because that would require escaping metacharacters in the string
435: * being searched for.
436: */
437: static void
438: sql_match(sqlite3_context *context, int argc, sqlite3_value **argv)
439: {
440:
441: assert(2 == argc);
442: sqlite3_result_int(context, NULL != strcasestr(
443: (const char *)sqlite3_value_text(argv[1]),
444: (const char *)sqlite3_value_text(argv[0])));
445: }
446:
447: /*
1.8 schwarze 448: * Implement regular expression match
449: * as an application-defined SQL function.
450: */
451: static void
452: sql_regexp(sqlite3_context *context, int argc, sqlite3_value **argv)
453: {
454:
455: assert(2 == argc);
456: sqlite3_result_int(context, !regexec(
457: (regex_t *)sqlite3_value_blob(argv[0]),
458: (const char *)sqlite3_value_text(argv[1]),
459: 0, NULL, 0));
460: }
461:
1.13 ! schwarze 462: static void
! 463: sql_append(char **sql, size_t *sz, const char *newstr, int count)
! 464: {
! 465: size_t newsz;
! 466:
! 467: newsz = 1 < count ? (size_t)count : strlen(newstr);
! 468: *sql = mandoc_realloc(*sql, *sz + newsz + 1);
! 469: if (1 < count)
! 470: memset(*sql + *sz, *newstr, (size_t)count);
! 471: else
! 472: memcpy(*sql + *sz, newstr, newsz);
! 473: *sz += newsz;
! 474: (*sql)[*sz] = '\0';
! 475: }
! 476:
1.8 schwarze 477: /*
1.1 kristaps 478: * Prepare the search SQL statement.
479: */
480: static char *
481: sql_statement(const struct expr *e, const char *arch, const char *sec)
482: {
483: char *sql;
484: size_t sz;
1.13 ! schwarze 485: int needop;
1.1 kristaps 486:
1.13 ! schwarze 487: sql = mandoc_strdup("SELECT * FROM mpages WHERE ");
1.1 kristaps 488: sz = strlen(sql);
1.2 kristaps 489:
1.13 ! schwarze 490: if (NULL != arch)
! 491: sql_append(&sql, &sz, "arch = ? AND ", 1);
! 492: if (NULL != sec)
! 493: sql_append(&sql, &sz, "sec = ? AND ", 1);
! 494: sql_append(&sql, &sz, "(", 1);
! 495:
! 496: for (needop = 0; NULL != e; e = e->next) {
! 497: if (e->and)
! 498: sql_append(&sql, &sz, " AND ", 1);
! 499: else if (needop)
! 500: sql_append(&sql, &sz, " OR ", 1);
! 501: if (e->open)
! 502: sql_append(&sql, &sz, "(", e->open);
! 503: sql_append(&sql, &sz, NULL == e->substr ?
! 504: "id IN (SELECT pageid FROM keys "
! 505: "WHERE key REGEXP ? AND bits & ?)" :
! 506: "id IN (SELECT pageid FROM keys "
! 507: "WHERE key MATCH ? AND bits & ?)", 1);
! 508: if (e->close)
! 509: sql_append(&sql, &sz, ")", e->close);
! 510: needop = 1;
1.1 kristaps 511: }
1.13 ! schwarze 512: sql_append(&sql, &sz, ")", 1);
1.1 kristaps 513:
514: return(sql);
515: }
516:
517: /*
518: * Compile a set of string tokens into an expression.
519: * Tokens in "argv" are assumed to be individual expression atoms (e.g.,
520: * "(", "foo=bar", etc.).
521: */
522: static struct expr *
1.5 kristaps 523: exprcomp(const struct mansearch *search, int argc, char *argv[])
1.1 kristaps 524: {
1.13 ! schwarze 525: int i, toopen, logic, igncase, toclose;
1.1 kristaps 526: struct expr *first, *next, *cur;
527:
528: first = cur = NULL;
1.13 ! schwarze 529: toopen = logic = igncase = toclose = 0;
1.1 kristaps 530:
531: for (i = 0; i < argc; i++) {
1.13 ! schwarze 532: if (0 == strcmp("(", argv[i])) {
! 533: if (igncase)
! 534: goto fail;
! 535: toopen++;
! 536: toclose++;
! 537: continue;
! 538: } else if (0 == strcmp(")", argv[i])) {
! 539: if (toopen || logic || igncase || NULL == cur)
! 540: goto fail;
! 541: cur->close++;
! 542: if (0 > --toclose)
! 543: goto fail;
! 544: continue;
! 545: } else if (0 == strcmp("-a", argv[i])) {
! 546: if (toopen || logic || igncase || NULL == cur)
! 547: goto fail;
! 548: logic = 1;
! 549: continue;
! 550: } else if (0 == strcmp("-o", argv[i])) {
! 551: if (toopen || logic || igncase || NULL == cur)
! 552: goto fail;
! 553: logic = 2;
! 554: continue;
! 555: } else if (0 == strcmp("-i", argv[i])) {
! 556: if (igncase)
! 557: goto fail;
! 558: igncase = 1;
! 559: continue;
1.1 kristaps 560: }
1.13 ! schwarze 561: next = exprterm(search, argv[i], !igncase);
! 562: if (NULL == next)
! 563: goto fail;
! 564: next->open = toopen;
! 565: next->and = (1 == logic);
1.1 kristaps 566: if (NULL != first) {
567: cur->next = next;
568: cur = next;
569: } else
570: cur = first = next;
1.13 ! schwarze 571: toopen = logic = igncase = 0;
1.1 kristaps 572: }
1.13 ! schwarze 573: if ( ! (toopen || logic || igncase || toclose))
! 574: return(first);
! 575: fail:
! 576: if (NULL != first)
! 577: exprfree(first);
! 578: return(NULL);
1.1 kristaps 579: }
580:
581: static struct expr *
1.8 schwarze 582: exprterm(const struct mansearch *search, char *buf, int cs)
1.1 kristaps 583: {
584: struct expr *e;
585: char *key, *v;
586: size_t i;
587:
588: if ('\0' == *buf)
589: return(NULL);
590:
591: e = mandoc_calloc(1, sizeof(struct expr));
592:
1.5 kristaps 593: /*"whatis" mode uses an opaque string and default fields. */
594:
595: if (MANSEARCH_WHATIS & search->flags) {
1.8 schwarze 596: e->substr = buf;
1.5 kristaps 597: e->bits = search->deftype;
598: return(e);
599: }
600:
1.1 kristaps 601: /*
602: * If no =~ is specified, search with equality over names and
603: * descriptions.
604: * If =~ begins the phrase, use name and description fields.
605: */
606:
607: if (NULL == (v = strpbrk(buf, "=~"))) {
1.8 schwarze 608: e->substr = buf;
1.5 kristaps 609: e->bits = search->deftype;
1.1 kristaps 610: return(e);
611: } else if (v == buf)
1.5 kristaps 612: e->bits = search->deftype;
1.1 kristaps 613:
1.8 schwarze 614: if ('~' == *v++) {
615: if (regcomp(&e->regexp, v,
616: REG_EXTENDED | REG_NOSUB | (cs ? 0 : REG_ICASE))) {
617: free(e);
618: return(NULL);
619: }
620: } else
621: e->substr = v;
622: v[-1] = '\0';
1.1 kristaps 623:
624: /*
625: * Parse out all possible fields.
626: * If the field doesn't resolve, bail.
627: */
628:
629: while (NULL != (key = strsep(&buf, ","))) {
630: if ('\0' == *key)
631: continue;
632: i = 0;
633: while (types[i].bits &&
634: strcasecmp(types[i].name, key))
635: i++;
636: if (0 == types[i].bits) {
637: free(e);
638: return(NULL);
639: }
640: e->bits |= types[i].bits;
641: }
642:
643: return(e);
644: }
645:
646: static void
647: exprfree(struct expr *p)
648: {
649: struct expr *pp;
650:
651: while (NULL != p) {
652: pp = p->next;
653: free(p);
654: p = pp;
655: }
656: }
657:
658: static void *
659: hash_halloc(size_t sz, void *arg)
660: {
661:
662: return(mandoc_calloc(sz, 1));
663: }
664:
665: static void *
666: hash_alloc(size_t sz, void *arg)
667: {
668:
669: return(mandoc_malloc(sz));
670: }
671:
672: static void
673: hash_free(void *p, size_t sz, void *arg)
674: {
675:
676: free(p);
677: }
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