880 lines
20 KiB
C
880 lines
20 KiB
C
/* $Id: mansearch.c,v 1.52 2014/12/06 01:23:24 schwarze Exp $ */
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/*
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* Copyright (c) 2012 Kristaps Dzonsons <kristaps@bsd.lv>
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* Copyright (c) 2013, 2014 Ingo Schwarze <schwarze@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "config.h"
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <limits.h>
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#include <regex.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#if HAVE_OHASH
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#include <ohash.h>
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#else
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#include "compat_ohash.h"
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#endif
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#include <sqlite3.h>
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#ifndef SQLITE_DETERMINISTIC
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#define SQLITE_DETERMINISTIC 0
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#endif
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#include "mandoc.h"
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#include "mandoc_aux.h"
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#include "manpath.h"
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#include "mansearch.h"
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extern int mansearch_keymax;
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extern const char *const mansearch_keynames[];
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#define SQL_BIND_TEXT(_db, _s, _i, _v) \
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do { if (SQLITE_OK != sqlite3_bind_text \
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((_s), (_i)++, (_v), -1, SQLITE_STATIC)) \
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fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
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} while (0)
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#define SQL_BIND_INT64(_db, _s, _i, _v) \
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do { if (SQLITE_OK != sqlite3_bind_int64 \
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((_s), (_i)++, (_v))) \
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fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
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} while (0)
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#define SQL_BIND_BLOB(_db, _s, _i, _v) \
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do { if (SQLITE_OK != sqlite3_bind_blob \
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((_s), (_i)++, (&_v), sizeof(_v), SQLITE_STATIC)) \
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fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
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} while (0)
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struct expr {
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regex_t regexp; /* compiled regexp, if applicable */
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const char *substr; /* to search for, if applicable */
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struct expr *next; /* next in sequence */
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uint64_t bits; /* type-mask */
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int equal; /* equality, not subsring match */
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int open; /* opening parentheses before */
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int and; /* logical AND before */
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int close; /* closing parentheses after */
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};
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struct match {
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uint64_t pageid; /* identifier in database */
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uint64_t bits; /* name type mask */
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char *desc; /* manual page description */
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int form; /* bit field: formatted, zipped? */
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};
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static void buildnames(struct manpage *, sqlite3 *,
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sqlite3_stmt *, uint64_t,
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const char *, int form);
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static char *buildoutput(sqlite3 *, sqlite3_stmt *,
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uint64_t, uint64_t);
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static void *hash_alloc(size_t, void *);
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static void hash_free(void *, void *);
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static void *hash_calloc(size_t, size_t, void *);
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static struct expr *exprcomp(const struct mansearch *,
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int, char *[]);
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static void exprfree(struct expr *);
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static struct expr *exprspec(struct expr *, uint64_t,
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const char *, const char *);
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static struct expr *exprterm(const struct mansearch *, char *, int);
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static int manpage_compare(const void *, const void *);
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static void sql_append(char **sql, size_t *sz,
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const char *newstr, int count);
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static void sql_match(sqlite3_context *context,
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int argc, sqlite3_value **argv);
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static void sql_regexp(sqlite3_context *context,
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int argc, sqlite3_value **argv);
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static char *sql_statement(const struct expr *);
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int
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mansearch_setup(int start)
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{
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static void *pagecache;
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int c;
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#define PC_PAGESIZE 1280
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#define PC_NUMPAGES 256
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if (start) {
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if (NULL != pagecache) {
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fprintf(stderr, "pagecache already enabled\n");
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return((int)MANDOCLEVEL_BADARG);
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}
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pagecache = mmap(NULL, PC_PAGESIZE * PC_NUMPAGES,
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PROT_READ | PROT_WRITE,
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MAP_SHARED | MAP_ANON, -1, 0);
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if (MAP_FAILED == pagecache) {
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perror("mmap");
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pagecache = NULL;
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return((int)MANDOCLEVEL_SYSERR);
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}
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c = sqlite3_config(SQLITE_CONFIG_PAGECACHE,
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pagecache, PC_PAGESIZE, PC_NUMPAGES);
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if (SQLITE_OK == c)
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return((int)MANDOCLEVEL_OK);
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fprintf(stderr, "pagecache: %s\n", sqlite3_errstr(c));
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} else if (NULL == pagecache) {
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fprintf(stderr, "pagecache missing\n");
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return((int)MANDOCLEVEL_BADARG);
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}
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if (-1 == munmap(pagecache, PC_PAGESIZE * PC_NUMPAGES)) {
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perror("munmap");
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pagecache = NULL;
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return((int)MANDOCLEVEL_SYSERR);
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}
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pagecache = NULL;
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return((int)MANDOCLEVEL_OK);
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}
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int
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mansearch(const struct mansearch *search,
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const struct manpaths *paths,
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int argc, char *argv[],
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struct manpage **res, size_t *sz)
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{
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int fd, rc, c, indexbit;
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int64_t pageid;
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uint64_t outbit, iterbit;
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char buf[PATH_MAX];
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char *sql;
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struct manpage *mpage;
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struct expr *e, *ep;
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sqlite3 *db;
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sqlite3_stmt *s, *s2;
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struct match *mp;
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struct ohash_info info;
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struct ohash htab;
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unsigned int idx;
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size_t i, j, cur, maxres;
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info.calloc = hash_calloc;
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info.alloc = hash_alloc;
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info.free = hash_free;
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info.key_offset = offsetof(struct match, pageid);
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*sz = cur = maxres = 0;
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sql = NULL;
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*res = NULL;
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fd = -1;
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e = NULL;
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rc = 0;
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if (0 == argc)
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goto out;
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if (NULL == (e = exprcomp(search, argc, argv)))
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goto out;
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outbit = 0;
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if (NULL != search->outkey) {
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for (indexbit = 0, iterbit = 1;
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indexbit < mansearch_keymax;
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indexbit++, iterbit <<= 1) {
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if (0 == strcasecmp(search->outkey,
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mansearch_keynames[indexbit])) {
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outbit = iterbit;
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break;
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}
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}
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}
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/*
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* Save a descriptor to the current working directory.
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* Since pathnames in the "paths" variable might be relative,
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* and we'll be chdir()ing into them, we need to keep a handle
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* on our current directory from which to start the chdir().
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*/
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if (NULL == getcwd(buf, PATH_MAX)) {
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perror("getcwd");
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goto out;
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} else if (-1 == (fd = open(buf, O_RDONLY, 0))) {
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perror(buf);
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goto out;
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}
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sql = sql_statement(e);
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/*
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* Loop over the directories (containing databases) for us to
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* search.
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* Don't let missing/bad databases/directories phase us.
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* In each, try to open the resident database and, if it opens,
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* scan it for our match expression.
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*/
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for (i = 0; i < paths->sz; i++) {
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if (-1 == fchdir(fd)) {
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perror(buf);
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free(*res);
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break;
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} else if (-1 == chdir(paths->paths[i])) {
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perror(paths->paths[i]);
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continue;
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}
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c = sqlite3_open_v2(MANDOC_DB, &db,
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SQLITE_OPEN_READONLY, NULL);
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if (SQLITE_OK != c) {
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fprintf(stderr, "%s/%s: %s\n",
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paths->paths[i], MANDOC_DB, strerror(errno));
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sqlite3_close(db);
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continue;
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}
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/*
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* Define the SQL functions for substring
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* and regular expression matching.
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*/
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c = sqlite3_create_function(db, "match", 2,
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SQLITE_UTF8 | SQLITE_DETERMINISTIC,
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NULL, sql_match, NULL, NULL);
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assert(SQLITE_OK == c);
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c = sqlite3_create_function(db, "regexp", 2,
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SQLITE_UTF8 | SQLITE_DETERMINISTIC,
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NULL, sql_regexp, NULL, NULL);
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assert(SQLITE_OK == c);
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j = 1;
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c = sqlite3_prepare_v2(db, sql, -1, &s, NULL);
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if (SQLITE_OK != c)
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fprintf(stderr, "%s\n", sqlite3_errmsg(db));
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for (ep = e; NULL != ep; ep = ep->next) {
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if (NULL == ep->substr) {
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SQL_BIND_BLOB(db, s, j, ep->regexp);
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} else
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SQL_BIND_TEXT(db, s, j, ep->substr);
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if (0 == ((TYPE_Nd | TYPE_Nm) & ep->bits))
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SQL_BIND_INT64(db, s, j, ep->bits);
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}
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memset(&htab, 0, sizeof(struct ohash));
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ohash_init(&htab, 4, &info);
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/*
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* Hash each entry on its [unique] document identifier.
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* This is a uint64_t.
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* Instead of using a hash function, simply convert the
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* uint64_t to a uint32_t, the hash value's type.
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* This gives good performance and preserves the
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* distribution of buckets in the table.
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*/
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while (SQLITE_ROW == (c = sqlite3_step(s))) {
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pageid = sqlite3_column_int64(s, 2);
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idx = ohash_lookup_memory(&htab,
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(char *)&pageid, sizeof(uint64_t),
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(uint32_t)pageid);
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if (NULL != ohash_find(&htab, idx))
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continue;
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mp = mandoc_calloc(1, sizeof(struct match));
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mp->pageid = pageid;
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mp->form = sqlite3_column_int(s, 1);
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mp->bits = sqlite3_column_int64(s, 3);
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if (TYPE_Nd == outbit)
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mp->desc = mandoc_strdup((const char *)
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sqlite3_column_text(s, 0));
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ohash_insert(&htab, idx, mp);
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}
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if (SQLITE_DONE != c)
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fprintf(stderr, "%s\n", sqlite3_errmsg(db));
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sqlite3_finalize(s);
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c = sqlite3_prepare_v2(db,
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"SELECT sec, arch, name, pageid FROM mlinks "
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"WHERE pageid=? ORDER BY sec, arch, name",
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-1, &s, NULL);
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if (SQLITE_OK != c)
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fprintf(stderr, "%s\n", sqlite3_errmsg(db));
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c = sqlite3_prepare_v2(db,
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"SELECT bits, key, pageid FROM keys "
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"WHERE pageid=? AND bits & ?",
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-1, &s2, NULL);
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if (SQLITE_OK != c)
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fprintf(stderr, "%s\n", sqlite3_errmsg(db));
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for (mp = ohash_first(&htab, &idx);
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NULL != mp;
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mp = ohash_next(&htab, &idx)) {
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if (cur + 1 > maxres) {
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maxres += 1024;
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*res = mandoc_reallocarray(*res,
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maxres, sizeof(struct manpage));
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}
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mpage = *res + cur;
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mpage->ipath = i;
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mpage->bits = mp->bits;
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mpage->sec = 10;
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mpage->form = mp->form;
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buildnames(mpage, db, s, mp->pageid,
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paths->paths[i], mp->form);
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mpage->output = TYPE_Nd & outbit ?
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mp->desc : outbit ?
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buildoutput(db, s2, mp->pageid, outbit) : NULL;
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free(mp);
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cur++;
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}
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sqlite3_finalize(s);
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sqlite3_finalize(s2);
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sqlite3_close(db);
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ohash_delete(&htab);
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/*
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* In man(1) mode, prefer matches in earlier trees
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* over matches in later trees.
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*/
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if (cur && search->firstmatch)
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break;
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}
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qsort(*res, cur, sizeof(struct manpage), manpage_compare);
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rc = 1;
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out:
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if (-1 != fd) {
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if (-1 == fchdir(fd))
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perror(buf);
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close(fd);
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}
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exprfree(e);
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free(sql);
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*sz = cur;
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return(rc);
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}
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void
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mansearch_free(struct manpage *res, size_t sz)
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{
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size_t i;
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for (i = 0; i < sz; i++) {
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free(res[i].file);
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free(res[i].names);
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free(res[i].output);
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}
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free(res);
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}
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static int
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manpage_compare(const void *vp1, const void *vp2)
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{
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const struct manpage *mp1, *mp2;
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int diff;
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mp1 = vp1;
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mp2 = vp2;
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return( (diff = mp2->bits - mp1->bits) ? diff :
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(diff = mp1->sec - mp2->sec) ? diff :
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strcasecmp(mp1->names, mp2->names));
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}
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static void
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buildnames(struct manpage *mpage, sqlite3 *db, sqlite3_stmt *s,
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uint64_t pageid, const char *path, int form)
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{
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char *newnames, *prevsec, *prevarch;
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const char *oldnames, *sep1, *name, *sec, *sep2, *arch, *fsec;
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size_t i;
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int c;
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mpage->file = NULL;
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mpage->names = NULL;
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prevsec = prevarch = NULL;
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i = 1;
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SQL_BIND_INT64(db, s, i, pageid);
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while (SQLITE_ROW == (c = sqlite3_step(s))) {
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/* Decide whether we already have some names. */
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if (NULL == mpage->names) {
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oldnames = "";
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sep1 = "";
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} else {
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oldnames = mpage->names;
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sep1 = ", ";
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}
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/* Fetch the next name. */
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sec = (const char *)sqlite3_column_text(s, 0);
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arch = (const char *)sqlite3_column_text(s, 1);
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name = (const char *)sqlite3_column_text(s, 2);
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/* Remember the first section found. */
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if (9 < mpage->sec && '1' <= *sec && '9' >= *sec)
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mpage->sec = (*sec - '1') + 1;
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/* If the section changed, append the old one. */
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if (NULL != prevsec &&
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(strcmp(sec, prevsec) ||
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strcmp(arch, prevarch))) {
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sep2 = '\0' == *prevarch ? "" : "/";
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mandoc_asprintf(&newnames, "%s(%s%s%s)",
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oldnames, prevsec, sep2, prevarch);
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free(mpage->names);
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oldnames = mpage->names = newnames;
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free(prevsec);
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free(prevarch);
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prevsec = prevarch = NULL;
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}
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/* Save the new section, to append it later. */
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if (NULL == prevsec) {
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prevsec = mandoc_strdup(sec);
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prevarch = mandoc_strdup(arch);
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}
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/* Append the new name. */
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mandoc_asprintf(&newnames, "%s%s%s",
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oldnames, sep1, name);
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free(mpage->names);
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mpage->names = newnames;
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/* Also save the first file name encountered. */
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if (mpage->file != NULL)
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continue;
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if (form & FORM_SRC) {
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sep1 = "man";
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fsec = sec;
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} else {
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sep1 = "cat";
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fsec = "0";
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}
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sep2 = *arch == '\0' ? "" : "/";
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mandoc_asprintf(&mpage->file, "%s/%s%s%s%s/%s.%s",
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path, sep1, sec, sep2, arch, name, fsec);
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}
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if (c != SQLITE_DONE)
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fprintf(stderr, "%s\n", sqlite3_errmsg(db));
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sqlite3_reset(s);
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/* Append one final section to the names. */
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if (prevsec != NULL) {
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sep2 = *prevarch == '\0' ? "" : "/";
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mandoc_asprintf(&newnames, "%s(%s%s%s)",
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mpage->names, prevsec, sep2, prevarch);
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free(mpage->names);
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mpage->names = newnames;
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free(prevsec);
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free(prevarch);
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}
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}
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static char *
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buildoutput(sqlite3 *db, sqlite3_stmt *s, uint64_t pageid, uint64_t outbit)
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{
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char *output, *newoutput;
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const char *oldoutput, *sep1, *data;
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size_t i;
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int c;
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output = NULL;
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i = 1;
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SQL_BIND_INT64(db, s, i, pageid);
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SQL_BIND_INT64(db, s, i, outbit);
|
|
while (SQLITE_ROW == (c = sqlite3_step(s))) {
|
|
if (NULL == output) {
|
|
oldoutput = "";
|
|
sep1 = "";
|
|
} else {
|
|
oldoutput = output;
|
|
sep1 = " # ";
|
|
}
|
|
data = (const char *)sqlite3_column_text(s, 1);
|
|
mandoc_asprintf(&newoutput, "%s%s%s",
|
|
oldoutput, sep1, data);
|
|
free(output);
|
|
output = newoutput;
|
|
}
|
|
if (SQLITE_DONE != c)
|
|
fprintf(stderr, "%s\n", sqlite3_errmsg(db));
|
|
sqlite3_reset(s);
|
|
return(output);
|
|
}
|
|
|
|
/*
|
|
* Implement substring match as an application-defined SQL function.
|
|
* Using the SQL LIKE or GLOB operators instead would be a bad idea
|
|
* because that would require escaping metacharacters in the string
|
|
* being searched for.
|
|
*/
|
|
static void
|
|
sql_match(sqlite3_context *context, int argc, sqlite3_value **argv)
|
|
{
|
|
|
|
assert(2 == argc);
|
|
sqlite3_result_int(context, NULL != strcasestr(
|
|
(const char *)sqlite3_value_text(argv[1]),
|
|
(const char *)sqlite3_value_text(argv[0])));
|
|
}
|
|
|
|
/*
|
|
* Implement regular expression match
|
|
* as an application-defined SQL function.
|
|
*/
|
|
static void
|
|
sql_regexp(sqlite3_context *context, int argc, sqlite3_value **argv)
|
|
{
|
|
|
|
assert(2 == argc);
|
|
sqlite3_result_int(context, !regexec(
|
|
(regex_t *)sqlite3_value_blob(argv[0]),
|
|
(const char *)sqlite3_value_text(argv[1]),
|
|
0, NULL, 0));
|
|
}
|
|
|
|
static void
|
|
sql_append(char **sql, size_t *sz, const char *newstr, int count)
|
|
{
|
|
size_t newsz;
|
|
|
|
newsz = 1 < count ? (size_t)count : strlen(newstr);
|
|
*sql = mandoc_realloc(*sql, *sz + newsz + 1);
|
|
if (1 < count)
|
|
memset(*sql + *sz, *newstr, (size_t)count);
|
|
else
|
|
memcpy(*sql + *sz, newstr, newsz);
|
|
*sz += newsz;
|
|
(*sql)[*sz] = '\0';
|
|
}
|
|
|
|
/*
|
|
* Prepare the search SQL statement.
|
|
*/
|
|
static char *
|
|
sql_statement(const struct expr *e)
|
|
{
|
|
char *sql;
|
|
size_t sz;
|
|
int needop;
|
|
|
|
sql = mandoc_strdup(e->equal ?
|
|
"SELECT desc, form, pageid, bits "
|
|
"FROM mpages NATURAL JOIN names WHERE " :
|
|
"SELECT desc, form, pageid, 0 FROM mpages WHERE ");
|
|
sz = strlen(sql);
|
|
|
|
for (needop = 0; NULL != e; e = e->next) {
|
|
if (e->and)
|
|
sql_append(&sql, &sz, " AND ", 1);
|
|
else if (needop)
|
|
sql_append(&sql, &sz, " OR ", 1);
|
|
if (e->open)
|
|
sql_append(&sql, &sz, "(", e->open);
|
|
sql_append(&sql, &sz,
|
|
TYPE_Nd & e->bits
|
|
? (NULL == e->substr
|
|
? "desc REGEXP ?"
|
|
: "desc MATCH ?")
|
|
: TYPE_Nm == e->bits
|
|
? (NULL == e->substr
|
|
? "pageid IN (SELECT pageid FROM names "
|
|
"WHERE name REGEXP ?)"
|
|
: e->equal
|
|
? "name = ? "
|
|
: "pageid IN (SELECT pageid FROM names "
|
|
"WHERE name MATCH ?)")
|
|
: (NULL == e->substr
|
|
? "pageid IN (SELECT pageid FROM keys "
|
|
"WHERE key REGEXP ? AND bits & ?)"
|
|
: "pageid IN (SELECT pageid FROM keys "
|
|
"WHERE key MATCH ? AND bits & ?)"), 1);
|
|
if (e->close)
|
|
sql_append(&sql, &sz, ")", e->close);
|
|
needop = 1;
|
|
}
|
|
|
|
return(sql);
|
|
}
|
|
|
|
/*
|
|
* Compile a set of string tokens into an expression.
|
|
* Tokens in "argv" are assumed to be individual expression atoms (e.g.,
|
|
* "(", "foo=bar", etc.).
|
|
*/
|
|
static struct expr *
|
|
exprcomp(const struct mansearch *search, int argc, char *argv[])
|
|
{
|
|
uint64_t mask;
|
|
int i, toopen, logic, igncase, toclose;
|
|
struct expr *first, *prev, *cur, *next;
|
|
|
|
first = cur = NULL;
|
|
logic = igncase = toclose = 0;
|
|
toopen = NULL != search->sec || NULL != search->arch;
|
|
|
|
for (i = 0; i < argc; i++) {
|
|
if (0 == strcmp("(", argv[i])) {
|
|
if (igncase)
|
|
goto fail;
|
|
toopen++;
|
|
toclose++;
|
|
continue;
|
|
} else if (0 == strcmp(")", argv[i])) {
|
|
if (toopen || logic || igncase || NULL == cur)
|
|
goto fail;
|
|
cur->close++;
|
|
if (0 > --toclose)
|
|
goto fail;
|
|
continue;
|
|
} else if (0 == strcmp("-a", argv[i])) {
|
|
if (toopen || logic || igncase || NULL == cur)
|
|
goto fail;
|
|
logic = 1;
|
|
continue;
|
|
} else if (0 == strcmp("-o", argv[i])) {
|
|
if (toopen || logic || igncase || NULL == cur)
|
|
goto fail;
|
|
logic = 2;
|
|
continue;
|
|
} else if (0 == strcmp("-i", argv[i])) {
|
|
if (igncase)
|
|
goto fail;
|
|
igncase = 1;
|
|
continue;
|
|
}
|
|
next = exprterm(search, argv[i], !igncase);
|
|
if (NULL == next)
|
|
goto fail;
|
|
if (NULL == first)
|
|
first = next;
|
|
else
|
|
cur->next = next;
|
|
prev = cur = next;
|
|
|
|
/*
|
|
* Searching for descriptions must be split out
|
|
* because they are stored in the mpages table,
|
|
* not in the keys table.
|
|
*/
|
|
|
|
for (mask = TYPE_Nm; mask <= TYPE_Nd; mask <<= 1) {
|
|
if (mask & cur->bits && ~mask & cur->bits) {
|
|
next = mandoc_calloc(1,
|
|
sizeof(struct expr));
|
|
memcpy(next, cur, sizeof(struct expr));
|
|
prev->open = 1;
|
|
cur->bits = mask;
|
|
cur->next = next;
|
|
cur = next;
|
|
cur->bits &= ~mask;
|
|
}
|
|
}
|
|
prev->and = (1 == logic);
|
|
prev->open += toopen;
|
|
if (cur != prev)
|
|
cur->close = 1;
|
|
|
|
toopen = logic = igncase = 0;
|
|
}
|
|
if (toopen || logic || igncase || toclose)
|
|
goto fail;
|
|
|
|
if (NULL != search->sec || NULL != search->arch)
|
|
cur->close++;
|
|
if (NULL != search->arch)
|
|
cur = exprspec(cur, TYPE_arch, search->arch, "^(%s|any)$");
|
|
if (NULL != search->sec)
|
|
exprspec(cur, TYPE_sec, search->sec, "^%s$");
|
|
|
|
return(first);
|
|
|
|
fail:
|
|
if (NULL != first)
|
|
exprfree(first);
|
|
return(NULL);
|
|
}
|
|
|
|
static struct expr *
|
|
exprspec(struct expr *cur, uint64_t key, const char *value,
|
|
const char *format)
|
|
{
|
|
char errbuf[BUFSIZ];
|
|
char *cp;
|
|
int irc;
|
|
|
|
mandoc_asprintf(&cp, format, value);
|
|
cur->next = mandoc_calloc(1, sizeof(struct expr));
|
|
cur = cur->next;
|
|
cur->and = 1;
|
|
cur->bits = key;
|
|
if (0 != (irc = regcomp(&cur->regexp, cp,
|
|
REG_EXTENDED | REG_NOSUB | REG_ICASE))) {
|
|
regerror(irc, &cur->regexp, errbuf, sizeof(errbuf));
|
|
fprintf(stderr, "regcomp: %s\n", errbuf);
|
|
cur->substr = value;
|
|
}
|
|
free(cp);
|
|
return(cur);
|
|
}
|
|
|
|
static struct expr *
|
|
exprterm(const struct mansearch *search, char *buf, int cs)
|
|
{
|
|
char errbuf[BUFSIZ];
|
|
struct expr *e;
|
|
char *key, *val;
|
|
uint64_t iterbit;
|
|
int i, irc;
|
|
|
|
if ('\0' == *buf)
|
|
return(NULL);
|
|
|
|
e = mandoc_calloc(1, sizeof(struct expr));
|
|
|
|
if (search->argmode == ARG_NAME) {
|
|
e->bits = TYPE_Nm;
|
|
e->substr = buf;
|
|
e->equal = 1;
|
|
return(e);
|
|
}
|
|
|
|
/*
|
|
* Separate macro keys from search string.
|
|
* If needed, request regular expression handling
|
|
* by setting e->substr to NULL.
|
|
*/
|
|
|
|
if (search->argmode == ARG_WORD) {
|
|
e->bits = TYPE_Nm;
|
|
e->substr = NULL;
|
|
mandoc_asprintf(&val, "[[:<:]]%s[[:>:]]", buf);
|
|
cs = 0;
|
|
} else if ((val = strpbrk(buf, "=~")) == NULL) {
|
|
e->bits = TYPE_Nm | TYPE_Nd;
|
|
e->substr = buf;
|
|
} else {
|
|
if (val == buf)
|
|
e->bits = TYPE_Nm | TYPE_Nd;
|
|
if ('=' == *val)
|
|
e->substr = val + 1;
|
|
*val++ = '\0';
|
|
if (NULL != strstr(buf, "arch"))
|
|
cs = 0;
|
|
}
|
|
|
|
/* Compile regular expressions. */
|
|
|
|
if (NULL == e->substr) {
|
|
irc = regcomp(&e->regexp, val,
|
|
REG_EXTENDED | REG_NOSUB | (cs ? 0 : REG_ICASE));
|
|
if (search->argmode == ARG_WORD)
|
|
free(val);
|
|
if (irc) {
|
|
regerror(irc, &e->regexp, errbuf, sizeof(errbuf));
|
|
fprintf(stderr, "regcomp: %s\n", errbuf);
|
|
free(e);
|
|
return(NULL);
|
|
}
|
|
}
|
|
|
|
if (e->bits)
|
|
return(e);
|
|
|
|
/*
|
|
* Parse out all possible fields.
|
|
* If the field doesn't resolve, bail.
|
|
*/
|
|
|
|
while (NULL != (key = strsep(&buf, ","))) {
|
|
if ('\0' == *key)
|
|
continue;
|
|
for (i = 0, iterbit = 1;
|
|
i < mansearch_keymax;
|
|
i++, iterbit <<= 1) {
|
|
if (0 == strcasecmp(key,
|
|
mansearch_keynames[i])) {
|
|
e->bits |= iterbit;
|
|
break;
|
|
}
|
|
}
|
|
if (i == mansearch_keymax) {
|
|
if (strcasecmp(key, "any")) {
|
|
free(e);
|
|
return(NULL);
|
|
}
|
|
e->bits |= ~0ULL;
|
|
}
|
|
}
|
|
|
|
return(e);
|
|
}
|
|
|
|
static void
|
|
exprfree(struct expr *p)
|
|
{
|
|
struct expr *pp;
|
|
|
|
while (NULL != p) {
|
|
pp = p->next;
|
|
free(p);
|
|
p = pp;
|
|
}
|
|
}
|
|
|
|
static void *
|
|
hash_calloc(size_t nmemb, size_t sz, void *arg)
|
|
{
|
|
|
|
return(mandoc_calloc(nmemb, sz));
|
|
}
|
|
|
|
static void *
|
|
hash_alloc(size_t sz, void *arg)
|
|
{
|
|
|
|
return(mandoc_malloc(sz));
|
|
}
|
|
|
|
static void
|
|
hash_free(void *p, void *arg)
|
|
{
|
|
|
|
free(p);
|
|
}
|