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- // -*- C++ -*-
- /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
- Written by James Clark (jjc@jclark.com)
-
- This file is part of groff.
-
- groff is free software; you can redistribute it and/or modify it under
- the terms of the GNU General Public License as published by the Free
- Software Foundation; either version 2, or (at your option) any later
- version.
-
- groff is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- for more details.
-
- You should have received a copy of the GNU General Public License along
- with groff; see the file COPYING. If not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include <stdlib.h>
- #include </gnu/include/string.h>
- #include <assert.h>
- #include <errno.h>
-
- #include "posix.h"
- #include "lib.h"
- #include "errarg.h"
- #include "error.h"
-
- #include "refid.h"
- #include "search.h"
-
- int linear_truncate_len = 6;
- const char *linear_ignore_fields = "XYZ";
-
- search_list::search_list()
- : list(0), niterators(0), next_fid(1)
- {
- }
-
- search_list::~search_list()
- {
- assert(niterators == 0);
- while (list) {
- search_item *tem = list->next;
- delete list;
- list = tem;
- }
- }
-
- void search_list::add_file(const char *filename, int silent)
- {
- search_item *p = make_index_search_item(filename, next_fid);
- if (!p) {
- int fd = open(filename, O_RDONLY);
- if (fd < 0) {
- if (!silent)
- error("can't open `%1': %2", filename, strerror(errno));
- }
- else
- p = make_linear_search_item(fd, filename, next_fid);
- }
- if (p) {
- for (search_item **pp = &list; *pp; pp = &(*pp)->next)
- ;
- *pp = p;
- next_fid = p->next_filename_id();
- }
- }
-
- int search_list::nfiles() const
- {
- int n = 0;
- for (search_item *ptr = list; ptr; ptr = ptr->next)
- n++;
- return n;
- }
-
- search_list_iterator::search_list_iterator(search_list *p, const char *q)
- : list(p), ptr(p->list), iter(0), query(strsave(q)),
- searcher(q, strlen(q), linear_ignore_fields, linear_truncate_len)
- {
- list->niterators += 1;
- }
-
- search_list_iterator::~search_list_iterator()
- {
- list->niterators -= 1;
- a_delete query;
- delete iter;
- }
-
- int search_list_iterator::next(const char **pp, int *lenp, reference_id *ridp)
- {
- while (ptr) {
- if (iter == 0)
- iter = ptr->make_search_item_iterator(query);
- if (iter->next(searcher, pp, lenp, ridp))
- return 1;
- delete iter;
- iter = 0;
- ptr = ptr->next;
- }
- return 0;
- }
-
- search_item::search_item(const char *nm, int fid)
- : next(0), name(strsave(nm)), filename_id(fid)
- {
- }
-
- search_item::~search_item()
- {
- a_delete name;
- }
-
- int search_item::is_named(const char *nm) const
- {
- return strcmp(name, nm) == 0;
- }
-
- int search_item::next_filename_id() const
- {
- return filename_id + 1;
- }
-
- search_item_iterator::~search_item_iterator()
- {
- }
-