Annotation of src/usr.bin/mandoc/mansearch.c, Revision 1.38
1.38 ! schwarze 1: /* $OpenBSD: mansearch.c,v 1.37 2014/11/18 01:14:40 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: */
1.33 schwarze 18:
1.19 schwarze 19: #include <sys/mman.h>
1.33 schwarze 20: #include <sys/types.h>
21:
1.1 schwarze 22: #include <assert.h>
23: #include <fcntl.h>
24: #include <getopt.h>
25: #include <limits.h>
26: #include <regex.h>
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:
34: #include <ohash.h>
35: #include <sqlite3.h>
36:
37: #include "mandoc.h"
1.14 schwarze 38: #include "mandoc_aux.h"
1.1 schwarze 39: #include "manpath.h"
40: #include "mansearch.h"
41:
1.11 schwarze 42: extern int mansearch_keymax;
43: extern const char *const mansearch_keynames[];
44:
1.1 schwarze 45: #define SQL_BIND_TEXT(_db, _s, _i, _v) \
46: do { if (SQLITE_OK != sqlite3_bind_text \
47: ((_s), (_i)++, (_v), -1, SQLITE_STATIC)) \
48: fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
49: } while (0)
50: #define SQL_BIND_INT64(_db, _s, _i, _v) \
51: do { if (SQLITE_OK != sqlite3_bind_int64 \
52: ((_s), (_i)++, (_v))) \
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)
60:
61: struct expr {
1.28 schwarze 62: regex_t regexp; /* compiled regexp, if applicable */
63: const char *substr; /* to search for, if applicable */
64: struct expr *next; /* next in sequence */
1.24 schwarze 65: uint64_t bits; /* type-mask */
1.28 schwarze 66: int equal; /* equality, not subsring match */
1.4 schwarze 67: int open; /* opening parentheses before */
68: int and; /* logical AND before */
69: int close; /* closing parentheses after */
1.1 schwarze 70: };
71:
72: struct match {
1.22 schwarze 73: uint64_t pageid; /* identifier in database */
1.37 schwarze 74: uint64_t bits; /* name type mask */
1.17 schwarze 75: char *desc; /* manual page description */
1.35 schwarze 76: int form; /* bit field: formatted, zipped? */
1.1 schwarze 77: };
78:
1.8 schwarze 79: static void buildnames(struct manpage *, sqlite3 *,
1.10 schwarze 80: sqlite3_stmt *, uint64_t,
81: const char *, int form);
1.3 schwarze 82: static char *buildoutput(sqlite3 *, sqlite3_stmt *,
83: uint64_t, uint64_t);
1.1 schwarze 84: static void *hash_alloc(size_t, void *);
1.27 espie 85: static void hash_free(void *, void *);
86: static void *hash_calloc(size_t, size_t, void *);
1.24 schwarze 87: static struct expr *exprcomp(const struct mansearch *,
1.1 schwarze 88: int, char *[]);
89: static void exprfree(struct expr *);
1.6 schwarze 90: static struct expr *exprspec(struct expr *, uint64_t,
91: const char *, const char *);
1.1 schwarze 92: static struct expr *exprterm(const struct mansearch *, char *, int);
1.29 schwarze 93: static int manpage_compare(const void *, const void *);
1.4 schwarze 94: static void sql_append(char **sql, size_t *sz,
95: const char *newstr, int count);
1.1 schwarze 96: static void sql_match(sqlite3_context *context,
97: int argc, sqlite3_value **argv);
98: static void sql_regexp(sqlite3_context *context,
99: int argc, sqlite3_value **argv);
1.6 schwarze 100: static char *sql_statement(const struct expr *);
1.19 schwarze 101:
1.24 schwarze 102:
1.19 schwarze 103: int
104: mansearch_setup(int start)
105: {
106: static void *pagecache;
107: int c;
108:
109: #define PC_PAGESIZE 1280
110: #define PC_NUMPAGES 256
111:
112: if (start) {
113: if (NULL != pagecache) {
114: fprintf(stderr, "pagecache already enabled\n");
115: return((int)MANDOCLEVEL_BADARG);
116: }
117:
118: pagecache = mmap(NULL, PC_PAGESIZE * PC_NUMPAGES,
1.31 schwarze 119: PROT_READ | PROT_WRITE,
120: MAP_SHARED | MAP_ANON, -1, 0);
1.19 schwarze 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 schwarze 150:
151: int
152: mansearch(const struct mansearch *search,
1.3 schwarze 153: const struct manpaths *paths,
154: int argc, char *argv[],
1.1 schwarze 155: struct manpage **res, size_t *sz)
156: {
1.11 schwarze 157: int fd, rc, c, indexbit;
1.22 schwarze 158: int64_t pageid;
1.11 schwarze 159: uint64_t outbit, iterbit;
1.1 schwarze 160: char buf[PATH_MAX];
1.2 schwarze 161: char *sql;
1.1 schwarze 162: struct manpage *mpage;
163: struct expr *e, *ep;
164: sqlite3 *db;
1.3 schwarze 165: sqlite3_stmt *s, *s2;
1.1 schwarze 166: struct match *mp;
167: struct ohash_info info;
168: struct ohash htab;
169: unsigned int idx;
170: size_t i, j, cur, maxres;
171:
1.27 espie 172: info.calloc = hash_calloc;
1.1 schwarze 173: info.alloc = hash_alloc;
1.27 espie 174: info.free = hash_free;
1.22 schwarze 175: info.key_offset = offsetof(struct match, pageid);
1.1 schwarze 176:
177: *sz = cur = maxres = 0;
178: sql = NULL;
179: *res = NULL;
180: fd = -1;
181: e = NULL;
182: rc = 0;
183:
184: if (0 == argc)
185: goto out;
186: if (NULL == (e = exprcomp(search, argc, argv)))
187: goto out;
188:
1.3 schwarze 189: outbit = 0;
1.33 schwarze 190: if (NULL != search->outkey) {
1.11 schwarze 191: for (indexbit = 0, iterbit = 1;
192: indexbit < mansearch_keymax;
193: indexbit++, iterbit <<= 1) {
1.33 schwarze 194: if (0 == strcasecmp(search->outkey,
1.11 schwarze 195: mansearch_keynames[indexbit])) {
196: outbit = iterbit;
1.3 schwarze 197: break;
198: }
199: }
200: }
201:
1.1 schwarze 202: /*
203: * Save a descriptor to the current working directory.
204: * Since pathnames in the "paths" variable might be relative,
205: * and we'll be chdir()ing into them, we need to keep a handle
206: * on our current directory from which to start the chdir().
207: */
208:
209: if (NULL == getcwd(buf, PATH_MAX)) {
1.20 schwarze 210: perror("getcwd");
1.1 schwarze 211: goto out;
212: } else if (-1 == (fd = open(buf, O_RDONLY, 0))) {
213: perror(buf);
214: goto out;
215: }
216:
1.6 schwarze 217: sql = sql_statement(e);
1.1 schwarze 218:
219: /*
220: * Loop over the directories (containing databases) for us to
221: * search.
222: * Don't let missing/bad databases/directories phase us.
223: * In each, try to open the resident database and, if it opens,
224: * scan it for our match expression.
225: */
226:
227: for (i = 0; i < paths->sz; i++) {
228: if (-1 == fchdir(fd)) {
229: perror(buf);
230: free(*res);
231: break;
232: } else if (-1 == chdir(paths->paths[i])) {
233: perror(paths->paths[i]);
234: continue;
1.24 schwarze 235: }
1.1 schwarze 236:
1.24 schwarze 237: c = sqlite3_open_v2(MANDOC_DB, &db,
238: SQLITE_OPEN_READONLY, NULL);
1.1 schwarze 239:
240: if (SQLITE_OK != c) {
241: perror(MANDOC_DB);
242: sqlite3_close(db);
243: continue;
244: }
245:
246: /*
247: * Define the SQL functions for substring
248: * and regular expression matching.
249: */
250:
251: c = sqlite3_create_function(db, "match", 2,
1.21 schwarze 252: SQLITE_UTF8 | SQLITE_DETERMINISTIC,
253: NULL, sql_match, NULL, NULL);
1.1 schwarze 254: assert(SQLITE_OK == c);
255: c = sqlite3_create_function(db, "regexp", 2,
1.21 schwarze 256: SQLITE_UTF8 | SQLITE_DETERMINISTIC,
257: NULL, sql_regexp, NULL, NULL);
1.1 schwarze 258: assert(SQLITE_OK == c);
259:
260: j = 1;
261: c = sqlite3_prepare_v2(db, sql, -1, &s, NULL);
262: if (SQLITE_OK != c)
263: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
264:
265: for (ep = e; NULL != ep; ep = ep->next) {
266: if (NULL == ep->substr) {
267: SQL_BIND_BLOB(db, s, j, ep->regexp);
268: } else
269: SQL_BIND_TEXT(db, s, j, ep->substr);
1.18 schwarze 270: if (0 == ((TYPE_Nd | TYPE_Nm) & ep->bits))
1.17 schwarze 271: SQL_BIND_INT64(db, s, j, ep->bits);
1.1 schwarze 272: }
273:
274: memset(&htab, 0, sizeof(struct ohash));
275: ohash_init(&htab, 4, &info);
276:
277: /*
278: * Hash each entry on its [unique] document identifier.
279: * This is a uint64_t.
280: * Instead of using a hash function, simply convert the
281: * uint64_t to a uint32_t, the hash value's type.
282: * This gives good performance and preserves the
283: * distribution of buckets in the table.
284: */
285: while (SQLITE_ROW == (c = sqlite3_step(s))) {
1.22 schwarze 286: pageid = sqlite3_column_int64(s, 2);
1.24 schwarze 287: idx = ohash_lookup_memory(&htab,
288: (char *)&pageid, sizeof(uint64_t),
289: (uint32_t)pageid);
1.1 schwarze 290:
291: if (NULL != ohash_find(&htab, idx))
292: continue;
293:
294: mp = mandoc_calloc(1, sizeof(struct match));
1.22 schwarze 295: mp->pageid = pageid;
1.17 schwarze 296: mp->form = sqlite3_column_int(s, 1);
1.37 schwarze 297: mp->bits = sqlite3_column_int64(s, 3);
1.17 schwarze 298: if (TYPE_Nd == outbit)
1.30 schwarze 299: mp->desc = mandoc_strdup((const char *)
1.17 schwarze 300: sqlite3_column_text(s, 0));
1.1 schwarze 301: ohash_insert(&htab, idx, mp);
302: }
303:
304: if (SQLITE_DONE != c)
305: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
306:
307: sqlite3_finalize(s);
308:
1.24 schwarze 309: c = sqlite3_prepare_v2(db,
1.25 schwarze 310: "SELECT sec, arch, name, pageid FROM mlinks "
311: "WHERE pageid=? ORDER BY sec, arch, name",
1.1 schwarze 312: -1, &s, NULL);
313: if (SQLITE_OK != c)
314: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
315:
1.3 schwarze 316: c = sqlite3_prepare_v2(db,
1.25 schwarze 317: "SELECT bits, key, pageid FROM keys "
318: "WHERE pageid=? AND bits & ?",
1.3 schwarze 319: -1, &s2, NULL);
320: if (SQLITE_OK != c)
321: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
322:
1.1 schwarze 323: for (mp = ohash_first(&htab, &idx);
324: NULL != mp;
325: mp = ohash_next(&htab, &idx)) {
326: if (cur + 1 > maxres) {
327: maxres += 1024;
1.26 schwarze 328: *res = mandoc_reallocarray(*res,
329: maxres, sizeof(struct manpage));
1.1 schwarze 330: }
331: mpage = *res + cur;
1.34 schwarze 332: mpage->ipath = i;
1.37 schwarze 333: mpage->bits = mp->bits;
1.29 schwarze 334: mpage->sec = 10;
1.1 schwarze 335: mpage->form = mp->form;
1.22 schwarze 336: buildnames(mpage, db, s, mp->pageid,
1.10 schwarze 337: paths->paths[i], mp->form);
1.17 schwarze 338: mpage->output = TYPE_Nd & outbit ?
339: mp->desc : outbit ?
1.22 schwarze 340: buildoutput(db, s2, mp->pageid, outbit) : NULL;
1.1 schwarze 341:
342: free(mp);
343: cur++;
344: }
345:
346: sqlite3_finalize(s);
1.3 schwarze 347: sqlite3_finalize(s2);
1.1 schwarze 348: sqlite3_close(db);
349: ohash_delete(&htab);
1.36 schwarze 350:
351: /*
352: * In man(1) mode, prefer matches in earlier trees
353: * over matches in later trees.
354: */
355:
356: if (cur && search->firstmatch)
357: break;
1.1 schwarze 358: }
1.29 schwarze 359: qsort(*res, cur, sizeof(struct manpage), manpage_compare);
1.1 schwarze 360: rc = 1;
361: out:
1.20 schwarze 362: if (-1 != fd) {
363: if (-1 == fchdir(fd))
364: perror(buf);
365: close(fd);
366: }
1.1 schwarze 367: exprfree(e);
368: free(sql);
369: *sz = cur;
370: return(rc);
1.2 schwarze 371: }
372:
1.33 schwarze 373: void
374: mansearch_free(struct manpage *res, size_t sz)
375: {
376: size_t i;
377:
378: for (i = 0; i < sz; i++) {
379: free(res[i].file);
380: free(res[i].names);
381: free(res[i].output);
382: }
383: free(res);
384: }
385:
1.29 schwarze 386: static int
387: manpage_compare(const void *vp1, const void *vp2)
388: {
389: const struct manpage *mp1, *mp2;
390: int diff;
391:
392: mp1 = vp1;
393: mp2 = vp2;
1.37 schwarze 394: return( (diff = mp2->bits - mp1->bits) ? diff :
395: (diff = mp1->sec - mp2->sec) ? diff :
396: strcasecmp(mp1->names, mp2->names));
1.29 schwarze 397: }
398:
1.8 schwarze 399: static void
400: buildnames(struct manpage *mpage, sqlite3 *db, sqlite3_stmt *s,
1.22 schwarze 401: uint64_t pageid, const char *path, int form)
1.2 schwarze 402: {
1.13 schwarze 403: char *newnames, *prevsec, *prevarch;
1.10 schwarze 404: const char *oldnames, *sep1, *name, *sec, *sep2, *arch, *fsec;
1.2 schwarze 405: size_t i;
406: int c;
407:
1.16 schwarze 408: mpage->file = NULL;
1.8 schwarze 409: mpage->names = NULL;
1.13 schwarze 410: prevsec = prevarch = NULL;
1.2 schwarze 411: i = 1;
1.22 schwarze 412: SQL_BIND_INT64(db, s, i, pageid);
1.2 schwarze 413: while (SQLITE_ROW == (c = sqlite3_step(s))) {
1.8 schwarze 414:
1.13 schwarze 415: /* Decide whether we already have some names. */
1.8 schwarze 416:
417: if (NULL == mpage->names) {
1.2 schwarze 418: oldnames = "";
419: sep1 = "";
420: } else {
1.8 schwarze 421: oldnames = mpage->names;
1.2 schwarze 422: sep1 = ", ";
423: }
1.13 schwarze 424:
425: /* Fetch the next name. */
426:
1.30 schwarze 427: sec = (const char *)sqlite3_column_text(s, 0);
428: arch = (const char *)sqlite3_column_text(s, 1);
429: name = (const char *)sqlite3_column_text(s, 2);
1.29 schwarze 430:
431: /* Remember the first section found. */
432:
433: if (9 < mpage->sec && '1' <= *sec && '9' >= *sec)
434: mpage->sec = (*sec - '1') + 1;
1.13 schwarze 435:
436: /* If the section changed, append the old one. */
437:
438: if (NULL != prevsec &&
439: (strcmp(sec, prevsec) ||
440: strcmp(arch, prevarch))) {
441: sep2 = '\0' == *prevarch ? "" : "/";
1.15 schwarze 442: mandoc_asprintf(&newnames, "%s(%s%s%s)",
443: oldnames, prevsec, sep2, prevarch);
1.13 schwarze 444: free(mpage->names);
445: oldnames = mpage->names = newnames;
446: free(prevsec);
447: free(prevarch);
448: prevsec = prevarch = NULL;
449: }
450:
451: /* Save the new section, to append it later. */
452:
453: if (NULL == prevsec) {
454: prevsec = mandoc_strdup(sec);
455: prevarch = mandoc_strdup(arch);
456: }
457:
458: /* Append the new name. */
459:
1.15 schwarze 460: mandoc_asprintf(&newnames, "%s%s%s",
461: oldnames, sep1, name);
1.8 schwarze 462: free(mpage->names);
463: mpage->names = newnames;
464:
465: /* Also save the first file name encountered. */
466:
1.38 ! schwarze 467: if (mpage->file != NULL)
1.8 schwarze 468: continue;
469:
1.35 schwarze 470: if (form & FORM_SRC) {
1.10 schwarze 471: sep1 = "man";
472: fsec = sec;
473: } else {
474: sep1 = "cat";
475: fsec = "0";
476: }
1.38 ! schwarze 477: sep2 = *arch == '\0' ? "" : "/";
! 478: mandoc_asprintf(&mpage->file, "%s/%s%s%s%s/%s.%s",
! 479: path, sep1, sec, sep2, arch, name, fsec);
1.2 schwarze 480: }
1.38 ! schwarze 481: if (c != SQLITE_DONE)
1.2 schwarze 482: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
483: sqlite3_reset(s);
1.13 schwarze 484:
485: /* Append one final section to the names. */
486:
1.38 ! schwarze 487: if (prevsec != NULL) {
! 488: sep2 = *prevarch == '\0' ? "" : "/";
1.15 schwarze 489: mandoc_asprintf(&newnames, "%s(%s%s%s)",
490: mpage->names, prevsec, sep2, prevarch);
1.13 schwarze 491: free(mpage->names);
492: mpage->names = newnames;
493: free(prevsec);
494: free(prevarch);
495: }
1.3 schwarze 496: }
497:
498: static char *
1.22 schwarze 499: buildoutput(sqlite3 *db, sqlite3_stmt *s, uint64_t pageid, uint64_t outbit)
1.3 schwarze 500: {
501: char *output, *newoutput;
502: const char *oldoutput, *sep1, *data;
503: size_t i;
504: int c;
505:
506: output = NULL;
507: i = 1;
1.22 schwarze 508: SQL_BIND_INT64(db, s, i, pageid);
1.3 schwarze 509: SQL_BIND_INT64(db, s, i, outbit);
510: while (SQLITE_ROW == (c = sqlite3_step(s))) {
511: if (NULL == output) {
512: oldoutput = "";
513: sep1 = "";
514: } else {
515: oldoutput = output;
516: sep1 = " # ";
517: }
1.30 schwarze 518: data = (const char *)sqlite3_column_text(s, 1);
1.15 schwarze 519: mandoc_asprintf(&newoutput, "%s%s%s",
520: oldoutput, sep1, data);
1.3 schwarze 521: free(output);
522: output = newoutput;
523: }
524: if (SQLITE_DONE != c)
525: fprintf(stderr, "%s\n", sqlite3_errmsg(db));
526: sqlite3_reset(s);
527: return(output);
1.1 schwarze 528: }
529:
530: /*
531: * Implement substring match as an application-defined SQL function.
532: * Using the SQL LIKE or GLOB operators instead would be a bad idea
533: * because that would require escaping metacharacters in the string
534: * being searched for.
535: */
536: static void
537: sql_match(sqlite3_context *context, int argc, sqlite3_value **argv)
538: {
539:
540: assert(2 == argc);
541: sqlite3_result_int(context, NULL != strcasestr(
542: (const char *)sqlite3_value_text(argv[1]),
543: (const char *)sqlite3_value_text(argv[0])));
544: }
545:
546: /*
547: * Implement regular expression match
548: * as an application-defined SQL function.
549: */
550: static void
551: sql_regexp(sqlite3_context *context, int argc, sqlite3_value **argv)
552: {
553:
554: assert(2 == argc);
555: sqlite3_result_int(context, !regexec(
556: (regex_t *)sqlite3_value_blob(argv[0]),
557: (const char *)sqlite3_value_text(argv[1]),
558: 0, NULL, 0));
559: }
560:
1.4 schwarze 561: static void
562: sql_append(char **sql, size_t *sz, const char *newstr, int count)
563: {
564: size_t newsz;
565:
566: newsz = 1 < count ? (size_t)count : strlen(newstr);
567: *sql = mandoc_realloc(*sql, *sz + newsz + 1);
568: if (1 < count)
569: memset(*sql + *sz, *newstr, (size_t)count);
570: else
571: memcpy(*sql + *sz, newstr, newsz);
572: *sz += newsz;
573: (*sql)[*sz] = '\0';
574: }
575:
1.1 schwarze 576: /*
577: * Prepare the search SQL statement.
578: */
579: static char *
1.6 schwarze 580: sql_statement(const struct expr *e)
1.1 schwarze 581: {
582: char *sql;
583: size_t sz;
1.4 schwarze 584: int needop;
1.1 schwarze 585:
1.37 schwarze 586: sql = mandoc_strdup(e->equal ?
587: "SELECT desc, form, pageid, bits "
588: "FROM mpages NATURAL JOIN names WHERE " :
589: "SELECT desc, form, pageid, 0 FROM mpages WHERE ");
1.1 schwarze 590: sz = strlen(sql);
591:
1.4 schwarze 592: for (needop = 0; NULL != e; e = e->next) {
593: if (e->and)
594: sql_append(&sql, &sz, " AND ", 1);
595: else if (needop)
596: sql_append(&sql, &sz, " OR ", 1);
597: if (e->open)
598: sql_append(&sql, &sz, "(", e->open);
1.17 schwarze 599: sql_append(&sql, &sz,
600: TYPE_Nd & e->bits
601: ? (NULL == e->substr
602: ? "desc REGEXP ?"
603: : "desc MATCH ?")
1.18 schwarze 604: : TYPE_Nm == e->bits
605: ? (NULL == e->substr
1.22 schwarze 606: ? "pageid IN (SELECT pageid FROM names "
1.18 schwarze 607: "WHERE name REGEXP ?)"
1.28 schwarze 608: : e->equal
1.37 schwarze 609: ? "name = ? "
1.22 schwarze 610: : "pageid IN (SELECT pageid FROM names "
1.18 schwarze 611: "WHERE name MATCH ?)")
1.17 schwarze 612: : (NULL == e->substr
1.22 schwarze 613: ? "pageid IN (SELECT pageid FROM keys "
1.17 schwarze 614: "WHERE key REGEXP ? AND bits & ?)"
1.22 schwarze 615: : "pageid IN (SELECT pageid FROM keys "
1.17 schwarze 616: "WHERE key MATCH ? AND bits & ?)"), 1);
1.4 schwarze 617: if (e->close)
618: sql_append(&sql, &sz, ")", e->close);
619: needop = 1;
1.1 schwarze 620: }
621:
622: return(sql);
623: }
624:
625: /*
626: * Compile a set of string tokens into an expression.
627: * Tokens in "argv" are assumed to be individual expression atoms (e.g.,
628: * "(", "foo=bar", etc.).
629: */
630: static struct expr *
631: exprcomp(const struct mansearch *search, int argc, char *argv[])
632: {
1.18 schwarze 633: uint64_t mask;
1.4 schwarze 634: int i, toopen, logic, igncase, toclose;
1.18 schwarze 635: struct expr *first, *prev, *cur, *next;
1.1 schwarze 636:
637: first = cur = NULL;
1.6 schwarze 638: logic = igncase = toclose = 0;
1.23 schwarze 639: toopen = NULL != search->sec || NULL != search->arch;
1.1 schwarze 640:
641: for (i = 0; i < argc; i++) {
1.4 schwarze 642: if (0 == strcmp("(", argv[i])) {
643: if (igncase)
644: goto fail;
645: toopen++;
646: toclose++;
647: continue;
648: } else if (0 == strcmp(")", argv[i])) {
649: if (toopen || logic || igncase || NULL == cur)
650: goto fail;
651: cur->close++;
652: if (0 > --toclose)
653: goto fail;
654: continue;
655: } else if (0 == strcmp("-a", argv[i])) {
656: if (toopen || logic || igncase || NULL == cur)
657: goto fail;
658: logic = 1;
659: continue;
660: } else if (0 == strcmp("-o", argv[i])) {
661: if (toopen || logic || igncase || NULL == cur)
662: goto fail;
663: logic = 2;
664: continue;
665: } else if (0 == strcmp("-i", argv[i])) {
666: if (igncase)
667: goto fail;
668: igncase = 1;
669: continue;
1.1 schwarze 670: }
1.4 schwarze 671: next = exprterm(search, argv[i], !igncase);
672: if (NULL == next)
673: goto fail;
1.17 schwarze 674: if (NULL == first)
675: first = next;
676: else
1.1 schwarze 677: cur->next = next;
1.18 schwarze 678: prev = cur = next;
1.17 schwarze 679:
680: /*
681: * Searching for descriptions must be split out
682: * because they are stored in the mpages table,
683: * not in the keys table.
684: */
685:
1.18 schwarze 686: for (mask = TYPE_Nm; mask <= TYPE_Nd; mask <<= 1) {
687: if (mask & cur->bits && ~mask & cur->bits) {
688: next = mandoc_calloc(1,
689: sizeof(struct expr));
690: memcpy(next, cur, sizeof(struct expr));
691: prev->open = 1;
692: cur->bits = mask;
693: cur->next = next;
694: cur = next;
695: cur->bits &= ~mask;
696: }
697: }
698: prev->and = (1 == logic);
699: prev->open += toopen;
700: if (cur != prev)
1.17 schwarze 701: cur->close = 1;
1.18 schwarze 702:
1.4 schwarze 703: toopen = logic = igncase = 0;
1.1 schwarze 704: }
1.6 schwarze 705: if (toopen || logic || igncase || toclose)
706: goto fail;
707:
1.23 schwarze 708: if (NULL != search->sec || NULL != search->arch)
709: cur->close++;
710: if (NULL != search->arch)
711: cur = exprspec(cur, TYPE_arch, search->arch, "^(%s|any)$");
712: if (NULL != search->sec)
713: exprspec(cur, TYPE_sec, search->sec, "^%s$");
1.6 schwarze 714:
715: return(first);
716:
1.4 schwarze 717: fail:
718: if (NULL != first)
719: exprfree(first);
720: return(NULL);
1.1 schwarze 721: }
722:
723: static struct expr *
1.6 schwarze 724: exprspec(struct expr *cur, uint64_t key, const char *value,
725: const char *format)
726: {
727: char errbuf[BUFSIZ];
728: char *cp;
729: int irc;
730:
1.15 schwarze 731: mandoc_asprintf(&cp, format, value);
1.6 schwarze 732: cur->next = mandoc_calloc(1, sizeof(struct expr));
733: cur = cur->next;
734: cur->and = 1;
735: cur->bits = key;
736: if (0 != (irc = regcomp(&cur->regexp, cp,
737: REG_EXTENDED | REG_NOSUB | REG_ICASE))) {
738: regerror(irc, &cur->regexp, errbuf, sizeof(errbuf));
739: fprintf(stderr, "regcomp: %s\n", errbuf);
740: cur->substr = value;
741: }
742: free(cp);
743: return(cur);
744: }
745:
746: static struct expr *
1.1 schwarze 747: exprterm(const struct mansearch *search, char *buf, int cs)
748: {
1.6 schwarze 749: char errbuf[BUFSIZ];
1.1 schwarze 750: struct expr *e;
1.28 schwarze 751: char *key, *val;
1.11 schwarze 752: uint64_t iterbit;
753: int i, irc;
1.1 schwarze 754:
755: if ('\0' == *buf)
756: return(NULL);
757:
758: e = mandoc_calloc(1, sizeof(struct expr));
759:
1.33 schwarze 760: if (search->argmode == ARG_NAME) {
761: e->bits = TYPE_Nm;
1.1 schwarze 762: e->substr = buf;
1.28 schwarze 763: e->equal = 1;
1.1 schwarze 764: return(e);
765: }
766:
767: /*
1.33 schwarze 768: * Separate macro keys from search string.
769: * If needed, request regular expression handling
770: * by setting e->substr to NULL.
1.1 schwarze 771: */
772:
1.33 schwarze 773: if (search->argmode == ARG_WORD) {
774: e->bits = TYPE_Nm;
775: e->substr = NULL;
776: mandoc_asprintf(&val, "[[:<:]]%s[[:>:]]", buf);
777: cs = 0;
778: } else if ((val = strpbrk(buf, "=~")) == NULL) {
779: e->bits = TYPE_Nm | TYPE_Nd;
1.1 schwarze 780: e->substr = buf;
1.28 schwarze 781: } else {
782: if (val == buf)
1.33 schwarze 783: e->bits = TYPE_Nm | TYPE_Nd;
1.28 schwarze 784: if ('=' == *val)
785: e->substr = val + 1;
786: *val++ = '\0';
1.12 schwarze 787: if (NULL != strstr(buf, "arch"))
788: cs = 0;
1.28 schwarze 789: }
790:
791: /* Compile regular expressions. */
792:
793: if (NULL == e->substr) {
794: irc = regcomp(&e->regexp, val,
795: REG_EXTENDED | REG_NOSUB | (cs ? 0 : REG_ICASE));
1.33 schwarze 796: if (search->argmode == ARG_WORD)
1.28 schwarze 797: free(val);
798: if (irc) {
1.6 schwarze 799: regerror(irc, &e->regexp, errbuf, sizeof(errbuf));
800: fprintf(stderr, "regcomp: %s\n", errbuf);
1.1 schwarze 801: free(e);
802: return(NULL);
803: }
1.28 schwarze 804: }
805:
806: if (e->bits)
807: return(e);
1.1 schwarze 808:
809: /*
810: * Parse out all possible fields.
811: * If the field doesn't resolve, bail.
812: */
813:
814: while (NULL != (key = strsep(&buf, ","))) {
815: if ('\0' == *key)
816: continue;
1.11 schwarze 817: for (i = 0, iterbit = 1;
818: i < mansearch_keymax;
819: i++, iterbit <<= 1) {
820: if (0 == strcasecmp(key,
821: mansearch_keynames[i])) {
822: e->bits |= iterbit;
823: break;
824: }
825: }
826: if (i == mansearch_keymax) {
827: if (strcasecmp(key, "any")) {
828: free(e);
829: return(NULL);
830: }
831: e->bits |= ~0ULL;
1.1 schwarze 832: }
833: }
834:
835: return(e);
836: }
837:
838: static void
839: exprfree(struct expr *p)
840: {
841: struct expr *pp;
842:
843: while (NULL != p) {
844: pp = p->next;
845: free(p);
846: p = pp;
847: }
848: }
849:
850: static void *
1.27 espie 851: hash_calloc(size_t nmemb, size_t sz, void *arg)
1.1 schwarze 852: {
853:
1.27 espie 854: return(mandoc_calloc(nmemb, sz));
1.1 schwarze 855: }
856:
857: static void *
858: hash_alloc(size_t sz, void *arg)
859: {
860:
861: return(mandoc_malloc(sz));
862: }
863:
864: static void
1.27 espie 865: hash_free(void *p, void *arg)
1.1 schwarze 866: {
867:
868: free(p);
869: }
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