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Viewing changes to libmount/src/iter.c

  • Committer: Package Import Robot
  • Author(s): LaMont Jones
  • Date: 2011-11-03 15:38:23 UTC
  • mto: (4.5.5 sid) (1.6.4)
  • mto: This revision was merged to the branch mainline in revision 85.
  • Revision ID: package-import@ubuntu.com-20111103153823-10sx16jprzxlhkqf
Import upstream version 2.20.1

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libmount/src/iter.c
 
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/*
 
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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 direction and last position for access to the internal
 
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 * library tables/lists.
 
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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 "mountP.h"
 
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/**
 
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 * mnt_new_iter:
 
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 * @direction: MNT_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 libmnt_iter *mnt_new_iter(int direction)
 
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{
 
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        struct libmnt_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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 * mnt_free_iter:
 
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 * @itr: iterator pointer
 
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 *
 
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 * Deallocates iterator.
 
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 */
 
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void mnt_free_iter(struct libmnt_iter *itr)
 
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{
 
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        free(itr);
 
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}
 
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/**
 
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 * mnt_reset_iter:
 
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 * @itr: iterator pointer
 
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 * @direction: MNT_INTER_{FOR,BACK}WARD or -1 to keep the derection unchanged
 
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 *
 
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 * Resets iterator.
 
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 */
 
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void mnt_reset_iter(struct libmnt_iter *itr, int direction)
 
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{
 
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        assert(itr);
 
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        if (direction == -1)
 
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                direction = itr->direction;
 
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        if (itr) {
 
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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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/**
 
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 * mnt_iter_get_direction:
 
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 * @itr: iterator pointer
 
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 *
 
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 * Returns: MNT_INTER_{FOR,BACK}WARD or negative number in case of error.
 
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 */
 
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int mnt_iter_get_direction(struct libmnt_iter *itr)
 
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{
 
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        assert(itr);
 
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        return itr ? itr->direction : -EINVAL;
 
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}