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master
libsmartcols/src/iter.c
74 строки
1 KB
Igor Gnatenko
libsmartcols: use const qualifier where it's possible
21 сен 2016, 09:36
21 сен 2016, 09:36
f7a9ea2
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/* * Copyright (C) 2009-2014 Karel Zak <kzak@redhat.com> * Copyright (C) 2014 Ondrej Oprala <ooprala@redhat.com> * * This file may be redistributed under the terms of the * GNU Lesser General Public License. */ /** * SECTION: iter * @title: Iterator * @short_description: unified iterator * * The iterator keeps the direction and the last position * for access to the internal library tables/lists. */ #include <string.h> #include <stdlib.h> #include "smartcolsP.h" /** * scols_new_iter: * @direction: SCOLS_INTER_{FOR,BACK}WARD direction * * Returns: newly allocated generic libmount iterator. */ struct libscols_iter *scols_new_iter(int direction) { struct libscols_iter *itr = calloc(1, sizeof(*itr)); if (!itr) return NULL; itr->direction = direction; return itr; } /** * scols_free_iter: * @itr: iterator pointer * * Deallocates the iterator. */ void scols_free_iter(struct libscols_iter *itr) { free(itr); } /** * scols_reset_iter: * @itr: iterator pointer * @direction: SCOLS_INTER_{FOR,BACK}WARD or -1 to keep the direction unchanged * * Resets the iterator. */ void scols_reset_iter(struct libscols_iter *itr, int direction) { if (direction == -1) direction = itr->direction; memset(itr, 0, sizeof(*itr)); itr->direction = direction; } /** * scols_iter_get_direction: * @itr: iterator pointer * * Returns: SCOLS_INTER_{FOR,BACK}WARD */ int scols_iter_get_direction(const struct libscols_iter *itr) { return itr->direction; }