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diff --git a/alpm12_list.h b/alpm12_list.h
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+/*
+ * alpm12_list.h
+ *
+ * Copyright (c) 2006-2020 Pacman Development Team <pacman-dev@archlinux.org>
+ * Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
+ *
+ * This program 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 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef ALPM12_LIST_H
+#define ALPM12_LIST_H
+
+#include <stdlib.h> /* size_t */
+
+/* Note: alpm_list.{c,h} are intended to be standalone files. Do not include
+ * any other libalpm headers.
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Linked list type used by libalpm.
+ *
+ * It is exposed so front ends can use it to prevent the need to reimplement
+ * lists of their own; however, it is not required that the front end uses
+ * it.
+ */
+typedef struct __alpm_list_t {
+ /** data held by the list node */
+ void *data;
+ /** pointer to the previous node */
+ struct __alpm_list_t *prev;
+ /** pointer to the next node */
+ struct __alpm_list_t *next;
+} alpm_list_t;
+
+#define FREELIST(p) do { alpm_list_free_inner(p, free); alpm_list_free(p); p = NULL; } while(0)
+
+typedef void (*alpm_list_fn_free)(void *); /* item deallocation callback */
+typedef int (*alpm_list_fn_cmp)(const void *, const void *); /* item comparison callback */
+
+/* allocation */
+void alpm_list_free(alpm_list_t *list);
+void alpm_list_free_inner(alpm_list_t *list, alpm_list_fn_free fn);
+
+/* item mutators */
+alpm_list_t *alpm_list_add(alpm_list_t *list, void *data);
+alpm_list_t *alpm_list_append(alpm_list_t **list, void *data);
+alpm_list_t *alpm_list_append_strdup(alpm_list_t **list, const char *data);
+alpm_list_t *alpm_list_add_sorted(alpm_list_t *list, void *data, alpm_list_fn_cmp fn);
+alpm_list_t *alpm_list_join(alpm_list_t *first, alpm_list_t *second);
+alpm_list_t *alpm_list_mmerge(alpm_list_t *left, alpm_list_t *right, alpm_list_fn_cmp fn);
+alpm_list_t *alpm_list_msort(alpm_list_t *list, size_t n, alpm_list_fn_cmp fn);
+alpm_list_t *alpm_list_remove_item(alpm_list_t *haystack, alpm_list_t *item);
+alpm_list_t *alpm_list_remove(alpm_list_t *haystack, const void *needle, alpm_list_fn_cmp fn, void **data);
+alpm_list_t *alpm_list_remove_str(alpm_list_t *haystack, const char *needle, char **data);
+alpm_list_t *alpm_list_remove_dupes(const alpm_list_t *list);
+alpm_list_t *alpm_list_strdup(const alpm_list_t *list);
+alpm_list_t *alpm_list_copy(const alpm_list_t *list);
+alpm_list_t *alpm_list_copy_data(const alpm_list_t *list, size_t size);
+alpm_list_t *alpm_list_reverse(alpm_list_t *list);
+
+/* item accessors */
+alpm_list_t *alpm_list_nth(const alpm_list_t *list, size_t n);
+alpm_list_t *alpm_list_next(const alpm_list_t *list);
+alpm_list_t *alpm_list_previous(const alpm_list_t *list);
+alpm_list_t *alpm_list_last(const alpm_list_t *list);
+
+/* misc */
+size_t alpm_list_count(const alpm_list_t *list);
+void *alpm_list_find(const alpm_list_t *haystack, const void *needle, alpm_list_fn_cmp fn);
+void *alpm_list_find_ptr(const alpm_list_t *haystack, const void *needle);
+char *alpm_list_find_str(const alpm_list_t *haystack, const char *needle);
+alpm_list_t *alpm_list_diff(const alpm_list_t *lhs, const alpm_list_t *rhs, alpm_list_fn_cmp fn);
+void alpm_list_diff_sorted(const alpm_list_t *left, const alpm_list_t *right,
+ alpm_list_fn_cmp fn, alpm_list_t **onlyleft, alpm_list_t **onlyright);
+void *alpm_list_to_array(const alpm_list_t *list, size_t n, size_t size);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* ALPM12_LIST_H */