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https://github.com/moparisthebest/pacman
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3dc87851cc
This is more efficient than alpm_list_diff since it assumes the two lists are sorted. And also we get the two sides of the diff. Even sorting should more efficient than the current list_diff. Sorting the two lists should be O(n*log(n)+m*log(m)) while the current list_diff is O(n*m). So I also reimplemented list_diff using list_diff_sorted. Signed-off-by: Xavier Chantry <shiningxc@gmail.com> Signed-off-by: Dan McGee <dan@archlinux.org>
90 lines
3.5 KiB
C
90 lines
3.5 KiB
C
/*
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* alpm_list.h
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*
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* Copyright (c) 2006-2009 Pacman Development Team <pacman-dev@archlinux.org>
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* Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _ALPM_LIST_H
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#define _ALPM_LIST_H
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#include <stdlib.h> /* size_t */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Linked list type used by libalpm.
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*
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* It is exposed so front ends can use it to prevent the need to reimplement
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* lists of their own; however, it is not required that the front end uses
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* it.
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*/
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typedef struct __alpm_list_t {
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/** data held by the list node */
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void *data;
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/** pointer to the previous node */
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struct __alpm_list_t *prev;
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/** pointer to the next node */
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struct __alpm_list_t *next;
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} alpm_list_t;
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#define FREELIST(p) do { alpm_list_free_inner(p, free); alpm_list_free(p); p = NULL; } while(0)
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typedef void (*alpm_list_fn_free)(void *); /* item deallocation callback */
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typedef int (*alpm_list_fn_cmp)(const void *, const void *); /* item comparison callback */
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/* allocation */
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void alpm_list_free(alpm_list_t *list);
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void alpm_list_free_inner(alpm_list_t *list, alpm_list_fn_free fn);
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/* item mutators */
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alpm_list_t *alpm_list_add(alpm_list_t *list, void *data);
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alpm_list_t *alpm_list_add_sorted(alpm_list_t *list, void *data, alpm_list_fn_cmp fn);
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alpm_list_t *alpm_list_join(alpm_list_t *first, alpm_list_t *second);
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alpm_list_t *alpm_list_mmerge(alpm_list_t *left, alpm_list_t *right, alpm_list_fn_cmp fn);
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alpm_list_t *alpm_list_msort(alpm_list_t *list, int n, alpm_list_fn_cmp fn);
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alpm_list_t *alpm_list_remove(alpm_list_t *haystack, const void *needle, alpm_list_fn_cmp fn, void **data);
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alpm_list_t *alpm_list_remove_str(alpm_list_t *haystack, const char *needle, char **data);
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alpm_list_t *alpm_list_remove_dupes(const alpm_list_t *list);
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alpm_list_t *alpm_list_strdup(const alpm_list_t *list);
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alpm_list_t *alpm_list_copy(const alpm_list_t *list);
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alpm_list_t *alpm_list_copy_data(const alpm_list_t *list, size_t size);
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alpm_list_t *alpm_list_reverse(alpm_list_t *list);
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/* item accessors */
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alpm_list_t *alpm_list_first(const alpm_list_t *list);
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alpm_list_t *alpm_list_nth(const alpm_list_t *list, int n);
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alpm_list_t *alpm_list_next(const alpm_list_t *list);
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alpm_list_t *alpm_list_last(const alpm_list_t *list);
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void *alpm_list_getdata(const alpm_list_t *entry);
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/* misc */
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int alpm_list_count(const alpm_list_t *list);
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void *alpm_list_find(const alpm_list_t *haystack, const void *needle, alpm_list_fn_cmp fn);
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void *alpm_list_find_ptr(const alpm_list_t *haystack, const void *needle);
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char *alpm_list_find_str(const alpm_list_t *haystack, const char *needle);
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alpm_list_t *alpm_list_diff(const alpm_list_t *lhs, const alpm_list_t *rhs, alpm_list_fn_cmp fn);
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void alpm_list_diff_sorted(alpm_list_t *left, alpm_list_t *right,
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alpm_list_fn_cmp fn, alpm_list_t **onlyleft, alpm_list_t **onlyright);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _ALPM_LIST_H */
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/* vim: set ts=2 sw=2 noet: */
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