bigbiff
7b4c7a681c
Break libblkid into 4 libraries: libblkid, libuuid, libutil-linux and libfdisk. This should help in later patch updates. Change-Id: I680d9a7feb031e5c29a603e9c58aff4b65826262
83 lines
1.8 KiB
C
83 lines
1.8 KiB
C
/*
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* Copyright (C) 2009 Karel Zak <kzak@redhat.com>
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*
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* This file may be redistributed under the terms of the
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* GNU Lesser General Public License.
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*/
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/**
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* SECTION: iter
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* @title: Iterator
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* @short_description: unified iterator
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*
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* The iterator keeps the direction and the last position for access to the
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* internal library tables/lists.
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*
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* It's very unusual to use the same iterator on multiple places in your
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* application or share the same iterator, for this purpose libfdisk does not
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* provide reference counting for this object. It's recommended to initialize
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* the iterator by fdisk_new_iter() at begin of your function and then
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* fdisk_free_iter() before you return from the function.
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*
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* Don't forget to call fdisk_reset_iter() if you want to use the iterator more
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* than once.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "fdiskP.h"
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/**
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* fdisk_new_iter:
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* @direction: FDISK_INTER_{FOR,BACK}WARD direction
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*
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* Returns: newly allocated generic libmount iterator.
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*/
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struct fdisk_iter *fdisk_new_iter(int direction)
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{
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struct fdisk_iter *itr = calloc(1, sizeof(*itr));
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if (!itr)
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return NULL;
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itr->direction = direction;
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return itr;
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}
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/**
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* fdisk_free_iter:
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* @itr: iterator pointer
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*
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* Deallocates the iterator.
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*/
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void fdisk_free_iter(struct fdisk_iter *itr)
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{
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free(itr);
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}
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/**
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* fdisk_reset_iter:
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* @itr: iterator pointer
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* @direction: FDISK_INTER_{FOR,BACK}WARD or -1 to keep the direction unchanged
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*
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* Resets the iterator.
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*/
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void fdisk_reset_iter(struct fdisk_iter *itr, int direction)
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{
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if (direction == -1)
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direction = itr->direction;
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memset(itr, 0, sizeof(*itr));
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itr->direction = direction;
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}
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/**
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* fdisk_iter_get_direction:
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* @itr: iterator pointer
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*
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* Returns: FDISK_INTER_{FOR,BACK}WARD
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*/
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int fdisk_iter_get_direction(struct fdisk_iter *itr)
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{
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return itr->direction;
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}
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