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5abdb52fdc
The list of strings is used quite frequently and we'd like to reuse this simple structure for report selection support too. Make it part of libdevmapper for general reuse throughout the code. This also simplifies the LVM code a bit since we don't need to include and manage lvm-types.h anymore (the string list was the only structure defined there).
125 lines
2.6 KiB
C
125 lines
2.6 KiB
C
/*
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* Copyright (C) 2003-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2012 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "lib.h"
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#include "str_list.h"
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struct dm_list *str_list_create(struct dm_pool *mem)
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{
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struct dm_list *sl;
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if (!(sl = dm_pool_alloc(mem, sizeof(struct dm_list)))) {
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log_errno(ENOMEM, "str_list allocation failed");
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return NULL;
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}
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dm_list_init(sl);
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return sl;
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}
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int str_list_add(struct dm_pool *mem, struct dm_list *sll, const char *str)
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{
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struct dm_str_list *sln;
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if (!str)
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return_0;
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/* Already in list? */
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if (str_list_match_item(sll, str))
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return 1;
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if (!(sln = dm_pool_alloc(mem, sizeof(*sln))))
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return_0;
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sln->str = str;
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dm_list_add(sll, &sln->list);
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return 1;
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}
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void str_list_del(struct dm_list *sll, const char *str)
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{
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struct dm_list *slh, *slht;
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dm_list_iterate_safe(slh, slht, sll)
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if (!strcmp(str, dm_list_item(slh, struct dm_str_list)->str))
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dm_list_del(slh);
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}
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int str_list_dup(struct dm_pool *mem, struct dm_list *sllnew,
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const struct dm_list *sllold)
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{
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struct dm_str_list *sl;
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dm_list_init(sllnew);
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dm_list_iterate_items(sl, sllold) {
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if (!str_list_add(mem, sllnew, dm_pool_strdup(mem, sl->str)))
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return_0;
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}
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return 1;
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}
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/*
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* Is item on list?
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*/
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int str_list_match_item(const struct dm_list *sll, const char *str)
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{
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struct dm_str_list *sl;
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dm_list_iterate_items(sl, sll)
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if (!strcmp(str, sl->str))
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return 1;
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return 0;
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}
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/*
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* Is at least one item on both lists?
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* If tag_matched is non-NULL, it is set to the tag that matched.
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*/
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int str_list_match_list(const struct dm_list *sll, const struct dm_list *sll2, const char **tag_matched)
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{
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struct dm_str_list *sl;
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dm_list_iterate_items(sl, sll)
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if (str_list_match_item(sll2, sl->str)) {
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if (tag_matched)
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*tag_matched = sl->str;
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return 1;
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}
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return 0;
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}
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/*
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* Do both lists contain the same set of items?
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*/
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int str_list_lists_equal(const struct dm_list *sll, const struct dm_list *sll2)
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{
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struct dm_str_list *sl;
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if (dm_list_size(sll) != dm_list_size(sll2))
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return 0;
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dm_list_iterate_items(sl, sll)
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if (!str_list_match_item(sll2, sl->str))
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return 0;
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return 1;
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}
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