Annotation of mandoc/mansearch.c, Revision 1.28
1.28 ! schwarze 1: /* $Id: mansearch.c,v 1.27 2014/04/10 02:46:21 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:
1.28 ! schwarze 22: #include <sys/mman.h>
1.1 kristaps 23: #include <assert.h>
24: #include <fcntl.h>
25: #include <getopt.h>
1.6 schwarze 26: #include <limits.h>
1.8 schwarze 27: #include <regex.h>
1.1 kristaps 28: #include <stdio.h>
29: #include <stdint.h>
30: #include <stddef.h>
31: #include <stdlib.h>
32: #include <string.h>
33: #include <unistd.h>
34:
1.4 kristaps 35: #ifdef HAVE_OHASH
1.1 kristaps 36: #include <ohash.h>
1.4 kristaps 37: #else
38: #include "compat_ohash.h"
39: #endif
1.1 kristaps 40: #include <sqlite3.h>
41:
42: #include "mandoc.h"
1.23 schwarze 43: #include "mandoc_aux.h"
1.1 kristaps 44: #include "manpath.h"
45: #include "mansearch.h"
46:
1.20 schwarze 47: extern int mansearch_keymax;
48: extern const char *const mansearch_keynames[];
49:
1.3 kristaps 50: #define SQL_BIND_TEXT(_db, _s, _i, _v) \
1.8 schwarze 51: do { if (SQLITE_OK != sqlite3_bind_text \
1.2 kristaps 52: ((_s), (_i)++, (_v), -1, SQLITE_STATIC)) \
1.8 schwarze 53: fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
54: } while (0)
1.3 kristaps 55: #define SQL_BIND_INT64(_db, _s, _i, _v) \
1.8 schwarze 56: do { if (SQLITE_OK != sqlite3_bind_int64 \
1.2 kristaps 57: ((_s), (_i)++, (_v))) \
1.8 schwarze 58: fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
59: } while (0)
60: #define SQL_BIND_BLOB(_db, _s, _i, _v) \
61: do { if (SQLITE_OK != sqlite3_bind_blob \
62: ((_s), (_i)++, (&_v), sizeof(_v), SQLITE_STATIC)) \
63: fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
64: } while (0)
1.2 kristaps 65:
1.1 kristaps 66: struct expr {
1.8 schwarze 67: uint64_t bits; /* type-mask */
68: const char *substr; /* to search for, if applicable */
69: regex_t regexp; /* compiled regexp, if applicable */
1.13 schwarze 70: int open; /* opening parentheses before */
71: int and; /* logical AND before */
72: int close; /* closing parentheses after */
1.8 schwarze 73: struct expr *next; /* next in sequence */
1.1 kristaps 74: };
75:
76: struct match {
77: uint64_t id; /* identifier in database */
1.26 schwarze 78: char *desc; /* manual page description */
1.1 kristaps 79: int form; /* 0 == catpage */
80: };
81:
1.17 schwarze 82: static void buildnames(struct manpage *, sqlite3 *,
1.19 schwarze 83: sqlite3_stmt *, uint64_t,
84: const char *, int form);
1.12 schwarze 85: static char *buildoutput(sqlite3 *, sqlite3_stmt *,
86: uint64_t, uint64_t);
1.1 kristaps 87: static void *hash_alloc(size_t, void *);
88: static void hash_free(void *, size_t, void *);
89: static void *hash_halloc(size_t, void *);
1.5 kristaps 90: static struct expr *exprcomp(const struct mansearch *,
91: int, char *[]);
1.1 kristaps 92: static void exprfree(struct expr *);
1.15 schwarze 93: static struct expr *exprspec(struct expr *, uint64_t,
94: const char *, const char *);
1.8 schwarze 95: static struct expr *exprterm(const struct mansearch *, char *, int);
1.13 schwarze 96: static void sql_append(char **sql, size_t *sz,
97: const char *newstr, int count);
1.7 schwarze 98: static void sql_match(sqlite3_context *context,
99: int argc, sqlite3_value **argv);
1.8 schwarze 100: static void sql_regexp(sqlite3_context *context,
101: int argc, sqlite3_value **argv);
1.15 schwarze 102: static char *sql_statement(const struct expr *);
1.28 ! schwarze 103:
! 104: int
! 105: mansearch_setup(int start)
! 106: {
! 107: static void *pagecache;
! 108: int c;
! 109:
! 110: #define PC_PAGESIZE 1280
! 111: #define PC_NUMPAGES 256
! 112:
! 113: if (start) {
! 114: if (NULL != pagecache) {
! 115: fprintf(stderr, "pagecache already enabled\n");
! 116: return((int)MANDOCLEVEL_BADARG);
! 117: }
! 118:
! 119: pagecache = mmap(NULL, PC_PAGESIZE * PC_NUMPAGES,
! 120: PROT_READ | PROT_WRITE, MAP_ANON, -1, 0);
! 121:
! 122: if (MAP_FAILED == pagecache) {
! 123: perror("mmap");
! 124: pagecache = NULL;
! 125: return((int)MANDOCLEVEL_SYSERR);
! 126: }
! 127:
! 128: c = sqlite3_config(SQLITE_CONFIG_PAGECACHE,
! 129: pagecache, PC_PAGESIZE, PC_NUMPAGES);
! 130:
! 131: if (SQLITE_OK == c)
! 132: return((int)MANDOCLEVEL_OK);
! 133:
! 134: fprintf(stderr, "pagecache: %s\n", sqlite3_errstr(c));
! 135:
! 136: } else if (NULL == pagecache) {
! 137: fprintf(stderr, "pagecache missing\n");
! 138: return((int)MANDOCLEVEL_BADARG);
! 139: }
! 140:
! 141: if (-1 == munmap(pagecache, PC_PAGESIZE * PC_NUMPAGES)) {
! 142: perror("munmap");
! 143: pagecache = NULL;
! 144: return((int)MANDOCLEVEL_SYSERR);
! 145: }
! 146:
! 147: pagecache = NULL;
! 148: return((int)MANDOCLEVEL_OK);
! 149: }
1.1 kristaps 150:
151: int
1.5 kristaps 152: mansearch(const struct mansearch *search,
1.12 schwarze 153: const struct manpaths *paths,
154: int argc, char *argv[],
155: const char *outkey,
1.1 kristaps 156: struct manpage **res, size_t *sz)
157: {
1.20 schwarze 158: int fd, rc, c, indexbit;
1.1 kristaps 159: int64_t id;
1.20 schwarze 160: uint64_t outbit, iterbit;
1.6 schwarze 161: char buf[PATH_MAX];
1.11 schwarze 162: char *sql;
1.10 schwarze 163: struct manpage *mpage;
1.1 kristaps 164: struct expr *e, *ep;
165: sqlite3 *db;
1.12 schwarze 166: sqlite3_stmt *s, *s2;
1.1 kristaps 167: struct match *mp;
168: struct ohash_info info;
169: struct ohash htab;
170: unsigned int idx;
171: size_t i, j, cur, maxres;
172:
173: memset(&info, 0, sizeof(struct ohash_info));
174:
175: info.halloc = hash_halloc;
176: info.alloc = hash_alloc;
177: info.hfree = hash_free;
178: info.key_offset = offsetof(struct match, id);
179:
1.2 kristaps 180: *sz = cur = maxres = 0;
1.1 kristaps 181: sql = NULL;
182: *res = NULL;
183: fd = -1;
184: e = NULL;
1.2 kristaps 185: rc = 0;
1.1 kristaps 186:
187: if (0 == argc)
188: goto out;
1.5 kristaps 189: if (NULL == (e = exprcomp(search, argc, argv)))
1.1 kristaps 190: goto out;
191:
1.12 schwarze 192: outbit = 0;
193: if (NULL != outkey) {
1.20 schwarze 194: for (indexbit = 0, iterbit = 1;
195: indexbit < mansearch_keymax;
196: indexbit++, iterbit <<= 1) {
197: if (0 == strcasecmp(outkey,
198: mansearch_keynames[indexbit])) {
199: outbit = iterbit;
1.12 schwarze 200: break;
201: }
202: }
203: }
204:
1.1 kristaps 205: /*
206: * Save a descriptor to the current working directory.
207: * Since pathnames in the "paths" variable might be relative,
208: * and we'll be chdir()ing into them, we need to keep a handle
209: * on our current directory from which to start the chdir().
210: */
211:
1.6 schwarze 212: if (NULL == getcwd(buf, PATH_MAX)) {
1.1 kristaps 213: perror(NULL);
214: goto out;
215: } else if (-1 == (fd = open(buf, O_RDONLY, 0))) {
216: perror(buf);
217: goto out;
218: }
219:
1.15 schwarze 220: sql = sql_statement(e);
1.1 kristaps 221:
222: /*
223: * Loop over the directories (containing databases) for us to
224: * search.
225: * Don't let missing/bad databases/directories phase us.
226: * In each, try to open the resident database and, if it opens,
227: * scan it for our match expression.
228: */
229:
230: for (i = 0; i < paths->sz; i++) {
231: if (-1 == fchdir(fd)) {
232: perror(buf);
233: free(*res);
234: break;
235: } else if (-1 == chdir(paths->paths[i])) {
236: perror(paths->paths[i]);
237: continue;
238: }
239:
1.2 kristaps 240: c = sqlite3_open_v2
241: (MANDOC_DB, &db,
242: SQLITE_OPEN_READONLY, NULL);
1.1 kristaps 243:
1.2 kristaps 244: if (SQLITE_OK != c) {
1.1 kristaps 245: perror(MANDOC_DB);
246: sqlite3_close(db);
247: continue;
248: }
249:
1.8 schwarze 250: /*
251: * Define the SQL functions for substring
252: * and regular expression matching.
253: */
1.7 schwarze 254:
255: c = sqlite3_create_function(db, "match", 2,
256: SQLITE_ANY, NULL, sql_match, NULL, NULL);
1.8 schwarze 257: assert(SQLITE_OK == c);
258: c = sqlite3_create_function(db, "regexp", 2,
259: SQLITE_ANY, NULL, sql_regexp, NULL, NULL);
260: assert(SQLITE_OK == c);
1.7 schwarze 261:
1.1 kristaps 262: j = 1;
1.2 kristaps 263: c = sqlite3_prepare_v2(db, sql, -1, &s, NULL);
264: if (SQLITE_OK != c)
265: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
1.1 kristaps 266:
267: for (ep = e; NULL != ep; ep = ep->next) {
1.8 schwarze 268: if (NULL == ep->substr) {
269: SQL_BIND_BLOB(db, s, j, ep->regexp);
270: } else
271: SQL_BIND_TEXT(db, s, j, ep->substr);
1.27 schwarze 272: if (0 == ((TYPE_Nd | TYPE_Nm) & ep->bits))
1.26 schwarze 273: SQL_BIND_INT64(db, s, j, ep->bits);
1.1 kristaps 274: }
275:
276: memset(&htab, 0, sizeof(struct ohash));
277: ohash_init(&htab, 4, &info);
278:
279: /*
280: * Hash each entry on its [unique] document identifier.
281: * This is a uint64_t.
282: * Instead of using a hash function, simply convert the
283: * uint64_t to a uint32_t, the hash value's type.
284: * This gives good performance and preserves the
285: * distribution of buckets in the table.
286: */
1.2 kristaps 287: while (SQLITE_ROW == (c = sqlite3_step(s))) {
1.26 schwarze 288: id = sqlite3_column_int64(s, 2);
1.1 kristaps 289: idx = ohash_lookup_memory
1.26 schwarze 290: (&htab, (char *)&id,
1.1 kristaps 291: sizeof(uint64_t), (uint32_t)id);
292:
293: if (NULL != ohash_find(&htab, idx))
294: continue;
295:
296: mp = mandoc_calloc(1, sizeof(struct match));
297: mp->id = id;
1.26 schwarze 298: mp->form = sqlite3_column_int(s, 1);
299: if (TYPE_Nd == outbit)
300: mp->desc = mandoc_strdup(
301: sqlite3_column_text(s, 0));
1.1 kristaps 302: ohash_insert(&htab, idx, mp);
303: }
304:
1.2 kristaps 305: if (SQLITE_DONE != c)
306: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
307:
1.1 kristaps 308: sqlite3_finalize(s);
1.10 schwarze 309:
310: c = sqlite3_prepare_v2(db,
1.22 schwarze 311: "SELECT * FROM mlinks WHERE pageid=?"
312: " ORDER BY sec, arch, name",
1.10 schwarze 313: -1, &s, NULL);
314: if (SQLITE_OK != c)
315: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
1.1 kristaps 316:
1.12 schwarze 317: c = sqlite3_prepare_v2(db,
318: "SELECT * FROM keys WHERE pageid=? AND bits & ?",
319: -1, &s2, NULL);
320: if (SQLITE_OK != c)
321: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
322:
1.1 kristaps 323: for (mp = ohash_first(&htab, &idx);
324: NULL != mp;
325: mp = ohash_next(&htab, &idx)) {
326: if (cur + 1 > maxres) {
327: maxres += 1024;
328: *res = mandoc_realloc
329: (*res, maxres * sizeof(struct manpage));
330: }
1.10 schwarze 331: mpage = *res + cur;
332: mpage->form = mp->form;
1.19 schwarze 333: buildnames(mpage, db, s, mp->id,
334: paths->paths[i], mp->form);
1.26 schwarze 335: mpage->output = TYPE_Nd & outbit ?
336: mp->desc : outbit ?
1.12 schwarze 337: buildoutput(db, s2, mp->id, outbit) : NULL;
1.10 schwarze 338:
1.1 kristaps 339: free(mp);
340: cur++;
341: }
1.10 schwarze 342:
343: sqlite3_finalize(s);
1.12 schwarze 344: sqlite3_finalize(s2);
1.10 schwarze 345: sqlite3_close(db);
1.1 kristaps 346: ohash_delete(&htab);
347: }
1.2 kristaps 348: rc = 1;
1.1 kristaps 349: out:
350: exprfree(e);
351: if (-1 != fd)
352: close(fd);
353: free(sql);
354: *sz = cur;
1.2 kristaps 355: return(rc);
1.11 schwarze 356: }
357:
1.17 schwarze 358: static void
359: buildnames(struct manpage *mpage, sqlite3 *db, sqlite3_stmt *s,
1.19 schwarze 360: uint64_t id, const char *path, int form)
1.11 schwarze 361: {
1.22 schwarze 362: char *newnames, *prevsec, *prevarch;
1.19 schwarze 363: const char *oldnames, *sep1, *name, *sec, *sep2, *arch, *fsec;
1.11 schwarze 364: size_t i;
365: int c;
366:
1.25 schwarze 367: mpage->file = NULL;
1.17 schwarze 368: mpage->names = NULL;
1.22 schwarze 369: prevsec = prevarch = NULL;
1.11 schwarze 370: i = 1;
371: SQL_BIND_INT64(db, s, i, id);
372: while (SQLITE_ROW == (c = sqlite3_step(s))) {
1.17 schwarze 373:
1.22 schwarze 374: /* Decide whether we already have some names. */
1.17 schwarze 375:
376: if (NULL == mpage->names) {
1.11 schwarze 377: oldnames = "";
378: sep1 = "";
379: } else {
1.17 schwarze 380: oldnames = mpage->names;
1.11 schwarze 381: sep1 = ", ";
382: }
1.22 schwarze 383:
384: /* Fetch the next name. */
385:
1.19 schwarze 386: sec = sqlite3_column_text(s, 0);
387: arch = sqlite3_column_text(s, 1);
388: name = sqlite3_column_text(s, 2);
1.22 schwarze 389:
390: /* If the section changed, append the old one. */
391:
392: if (NULL != prevsec &&
393: (strcmp(sec, prevsec) ||
394: strcmp(arch, prevarch))) {
395: sep2 = '\0' == *prevarch ? "" : "/";
1.24 schwarze 396: mandoc_asprintf(&newnames, "%s(%s%s%s)",
397: oldnames, prevsec, sep2, prevarch);
1.22 schwarze 398: free(mpage->names);
399: oldnames = mpage->names = newnames;
400: free(prevsec);
401: free(prevarch);
402: prevsec = prevarch = NULL;
403: }
404:
405: /* Save the new section, to append it later. */
406:
407: if (NULL == prevsec) {
408: prevsec = mandoc_strdup(sec);
409: prevarch = mandoc_strdup(arch);
410: }
411:
412: /* Append the new name. */
413:
1.24 schwarze 414: mandoc_asprintf(&newnames, "%s%s%s",
415: oldnames, sep1, name);
1.17 schwarze 416: free(mpage->names);
417: mpage->names = newnames;
418:
419: /* Also save the first file name encountered. */
420:
421: if (NULL != mpage->file)
422: continue;
423:
1.19 schwarze 424: if (form) {
425: sep1 = "man";
426: fsec = sec;
427: } else {
428: sep1 = "cat";
429: fsec = "0";
430: }
1.22 schwarze 431: sep2 = '\0' == *arch ? "" : "/";
1.24 schwarze 432: mandoc_asprintf(&mpage->file, "%s/%s%s%s%s/%s.%s",
433: path, sep1, sec, sep2, arch, name, fsec);
1.11 schwarze 434: }
435: if (SQLITE_DONE != c)
436: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
437: sqlite3_reset(s);
1.22 schwarze 438:
439: /* Append one final section to the names. */
440:
441: if (NULL != prevsec) {
442: sep2 = '\0' == *prevarch ? "" : "/";
1.24 schwarze 443: mandoc_asprintf(&newnames, "%s(%s%s%s)",
444: mpage->names, prevsec, sep2, prevarch);
1.22 schwarze 445: free(mpage->names);
446: mpage->names = newnames;
447: free(prevsec);
448: free(prevarch);
449: }
1.12 schwarze 450: }
451:
452: static char *
453: buildoutput(sqlite3 *db, sqlite3_stmt *s, uint64_t id, uint64_t outbit)
454: {
455: char *output, *newoutput;
456: const char *oldoutput, *sep1, *data;
457: size_t i;
458: int c;
459:
460: output = NULL;
461: i = 1;
462: SQL_BIND_INT64(db, s, i, id);
463: SQL_BIND_INT64(db, s, i, outbit);
464: while (SQLITE_ROW == (c = sqlite3_step(s))) {
465: if (NULL == output) {
466: oldoutput = "";
467: sep1 = "";
468: } else {
469: oldoutput = output;
470: sep1 = " # ";
471: }
472: data = sqlite3_column_text(s, 1);
1.24 schwarze 473: mandoc_asprintf(&newoutput, "%s%s%s",
474: oldoutput, sep1, data);
1.12 schwarze 475: free(output);
476: output = newoutput;
477: }
478: if (SQLITE_DONE != c)
479: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
480: sqlite3_reset(s);
481: return(output);
1.1 kristaps 482: }
483:
484: /*
1.7 schwarze 485: * Implement substring match as an application-defined SQL function.
486: * Using the SQL LIKE or GLOB operators instead would be a bad idea
487: * because that would require escaping metacharacters in the string
488: * being searched for.
489: */
490: static void
491: sql_match(sqlite3_context *context, int argc, sqlite3_value **argv)
492: {
493:
494: assert(2 == argc);
495: sqlite3_result_int(context, NULL != strcasestr(
496: (const char *)sqlite3_value_text(argv[1]),
497: (const char *)sqlite3_value_text(argv[0])));
498: }
499:
500: /*
1.8 schwarze 501: * Implement regular expression match
502: * as an application-defined SQL function.
503: */
504: static void
505: sql_regexp(sqlite3_context *context, int argc, sqlite3_value **argv)
506: {
507:
508: assert(2 == argc);
509: sqlite3_result_int(context, !regexec(
510: (regex_t *)sqlite3_value_blob(argv[0]),
511: (const char *)sqlite3_value_text(argv[1]),
512: 0, NULL, 0));
513: }
514:
1.13 schwarze 515: static void
516: sql_append(char **sql, size_t *sz, const char *newstr, int count)
517: {
518: size_t newsz;
519:
520: newsz = 1 < count ? (size_t)count : strlen(newstr);
521: *sql = mandoc_realloc(*sql, *sz + newsz + 1);
522: if (1 < count)
523: memset(*sql + *sz, *newstr, (size_t)count);
524: else
525: memcpy(*sql + *sz, newstr, newsz);
526: *sz += newsz;
527: (*sql)[*sz] = '\0';
528: }
529:
1.8 schwarze 530: /*
1.1 kristaps 531: * Prepare the search SQL statement.
532: */
533: static char *
1.15 schwarze 534: sql_statement(const struct expr *e)
1.1 kristaps 535: {
536: char *sql;
537: size_t sz;
1.13 schwarze 538: int needop;
1.1 kristaps 539:
1.13 schwarze 540: sql = mandoc_strdup("SELECT * FROM mpages WHERE ");
1.1 kristaps 541: sz = strlen(sql);
1.2 kristaps 542:
1.13 schwarze 543: for (needop = 0; NULL != e; e = e->next) {
544: if (e->and)
545: sql_append(&sql, &sz, " AND ", 1);
546: else if (needop)
547: sql_append(&sql, &sz, " OR ", 1);
548: if (e->open)
549: sql_append(&sql, &sz, "(", e->open);
1.26 schwarze 550: sql_append(&sql, &sz,
551: TYPE_Nd & e->bits
552: ? (NULL == e->substr
553: ? "desc REGEXP ?"
554: : "desc MATCH ?")
1.27 schwarze 555: : TYPE_Nm == e->bits
556: ? (NULL == e->substr
557: ? "id IN (SELECT pageid FROM names "
558: "WHERE name REGEXP ?)"
559: : "id IN (SELECT pageid FROM names "
560: "WHERE name MATCH ?)")
1.26 schwarze 561: : (NULL == e->substr
562: ? "id IN (SELECT pageid FROM keys "
563: "WHERE key REGEXP ? AND bits & ?)"
564: : "id IN (SELECT pageid FROM keys "
565: "WHERE key MATCH ? AND bits & ?)"), 1);
1.13 schwarze 566: if (e->close)
567: sql_append(&sql, &sz, ")", e->close);
568: needop = 1;
1.1 kristaps 569: }
570:
571: return(sql);
572: }
573:
574: /*
575: * Compile a set of string tokens into an expression.
576: * Tokens in "argv" are assumed to be individual expression atoms (e.g.,
577: * "(", "foo=bar", etc.).
578: */
579: static struct expr *
1.5 kristaps 580: exprcomp(const struct mansearch *search, int argc, char *argv[])
1.1 kristaps 581: {
1.27 schwarze 582: uint64_t mask;
1.13 schwarze 583: int i, toopen, logic, igncase, toclose;
1.27 schwarze 584: struct expr *first, *prev, *cur, *next;
1.1 kristaps 585:
586: first = cur = NULL;
1.15 schwarze 587: logic = igncase = toclose = 0;
588: toopen = 1;
1.1 kristaps 589:
590: for (i = 0; i < argc; i++) {
1.13 schwarze 591: if (0 == strcmp("(", argv[i])) {
592: if (igncase)
593: goto fail;
594: toopen++;
595: toclose++;
596: continue;
597: } else if (0 == strcmp(")", argv[i])) {
598: if (toopen || logic || igncase || NULL == cur)
599: goto fail;
600: cur->close++;
601: if (0 > --toclose)
602: goto fail;
603: continue;
604: } else if (0 == strcmp("-a", argv[i])) {
605: if (toopen || logic || igncase || NULL == cur)
606: goto fail;
607: logic = 1;
608: continue;
609: } else if (0 == strcmp("-o", argv[i])) {
610: if (toopen || logic || igncase || NULL == cur)
611: goto fail;
612: logic = 2;
613: continue;
614: } else if (0 == strcmp("-i", argv[i])) {
615: if (igncase)
616: goto fail;
617: igncase = 1;
618: continue;
1.1 kristaps 619: }
1.13 schwarze 620: next = exprterm(search, argv[i], !igncase);
621: if (NULL == next)
622: goto fail;
1.26 schwarze 623: if (NULL == first)
624: first = next;
625: else
1.1 kristaps 626: cur->next = next;
1.27 schwarze 627: prev = cur = next;
1.26 schwarze 628:
629: /*
630: * Searching for descriptions must be split out
631: * because they are stored in the mpages table,
632: * not in the keys table.
633: */
634:
1.27 schwarze 635: for (mask = TYPE_Nm; mask <= TYPE_Nd; mask <<= 1) {
636: if (mask & cur->bits && ~mask & cur->bits) {
637: next = mandoc_calloc(1,
638: sizeof(struct expr));
639: memcpy(next, cur, sizeof(struct expr));
640: prev->open = 1;
641: cur->bits = mask;
642: cur->next = next;
643: cur = next;
644: cur->bits &= ~mask;
645: }
646: }
647: prev->and = (1 == logic);
648: prev->open += toopen;
649: if (cur != prev)
1.26 schwarze 650: cur->close = 1;
1.27 schwarze 651:
1.13 schwarze 652: toopen = logic = igncase = 0;
1.1 kristaps 653: }
1.15 schwarze 654: if (toopen || logic || igncase || toclose)
655: goto fail;
656:
657: cur->close++;
658: cur = exprspec(cur, TYPE_arch, search->arch, "^(%s|any)$");
659: exprspec(cur, TYPE_sec, search->sec, "^%s$");
660:
661: return(first);
662:
1.13 schwarze 663: fail:
664: if (NULL != first)
665: exprfree(first);
666: return(NULL);
1.1 kristaps 667: }
668:
669: static struct expr *
1.15 schwarze 670: exprspec(struct expr *cur, uint64_t key, const char *value,
671: const char *format)
672: {
673: char errbuf[BUFSIZ];
674: char *cp;
675: int irc;
676:
677: if (NULL == value)
678: return(cur);
679:
1.24 schwarze 680: mandoc_asprintf(&cp, format, value);
1.15 schwarze 681: cur->next = mandoc_calloc(1, sizeof(struct expr));
682: cur = cur->next;
683: cur->and = 1;
684: cur->bits = key;
685: if (0 != (irc = regcomp(&cur->regexp, cp,
686: REG_EXTENDED | REG_NOSUB | REG_ICASE))) {
687: regerror(irc, &cur->regexp, errbuf, sizeof(errbuf));
688: fprintf(stderr, "regcomp: %s\n", errbuf);
689: cur->substr = value;
690: }
691: free(cp);
692: return(cur);
693: }
694:
695: static struct expr *
1.8 schwarze 696: exprterm(const struct mansearch *search, char *buf, int cs)
1.1 kristaps 697: {
1.15 schwarze 698: char errbuf[BUFSIZ];
1.1 kristaps 699: struct expr *e;
700: char *key, *v;
1.20 schwarze 701: uint64_t iterbit;
702: int i, irc;
1.1 kristaps 703:
704: if ('\0' == *buf)
705: return(NULL);
706:
707: e = mandoc_calloc(1, sizeof(struct expr));
708:
1.5 kristaps 709: /*"whatis" mode uses an opaque string and default fields. */
710:
711: if (MANSEARCH_WHATIS & search->flags) {
1.8 schwarze 712: e->substr = buf;
1.5 kristaps 713: e->bits = search->deftype;
714: return(e);
715: }
716:
1.1 kristaps 717: /*
718: * If no =~ is specified, search with equality over names and
719: * descriptions.
720: * If =~ begins the phrase, use name and description fields.
721: */
722:
723: if (NULL == (v = strpbrk(buf, "=~"))) {
1.8 schwarze 724: e->substr = buf;
1.5 kristaps 725: e->bits = search->deftype;
1.1 kristaps 726: return(e);
727: } else if (v == buf)
1.5 kristaps 728: e->bits = search->deftype;
1.1 kristaps 729:
1.8 schwarze 730: if ('~' == *v++) {
1.21 schwarze 731: if (NULL != strstr(buf, "arch"))
732: cs = 0;
1.15 schwarze 733: if (0 != (irc = regcomp(&e->regexp, v,
734: REG_EXTENDED | REG_NOSUB | (cs ? 0 : REG_ICASE)))) {
735: regerror(irc, &e->regexp, errbuf, sizeof(errbuf));
736: fprintf(stderr, "regcomp: %s\n", errbuf);
1.8 schwarze 737: free(e);
738: return(NULL);
739: }
740: } else
741: e->substr = v;
742: v[-1] = '\0';
1.1 kristaps 743:
744: /*
745: * Parse out all possible fields.
746: * If the field doesn't resolve, bail.
747: */
748:
749: while (NULL != (key = strsep(&buf, ","))) {
750: if ('\0' == *key)
751: continue;
1.20 schwarze 752: for (i = 0, iterbit = 1;
753: i < mansearch_keymax;
754: i++, iterbit <<= 1) {
755: if (0 == strcasecmp(key,
756: mansearch_keynames[i])) {
757: e->bits |= iterbit;
758: break;
759: }
760: }
761: if (i == mansearch_keymax) {
762: if (strcasecmp(key, "any")) {
763: free(e);
764: return(NULL);
765: }
766: e->bits |= ~0ULL;
1.1 kristaps 767: }
768: }
769:
770: return(e);
771: }
772:
773: static void
774: exprfree(struct expr *p)
775: {
776: struct expr *pp;
777:
778: while (NULL != p) {
779: pp = p->next;
780: free(p);
781: p = pp;
782: }
783: }
784:
785: static void *
786: hash_halloc(size_t sz, void *arg)
787: {
788:
789: return(mandoc_calloc(sz, 1));
790: }
791:
792: static void *
793: hash_alloc(size_t sz, void *arg)
794: {
795:
796: return(mandoc_malloc(sz));
797: }
798:
799: static void
800: hash_free(void *p, size_t sz, void *arg)
801: {
802:
803: free(p);
804: }
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