lib/libalpm/backup.c


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/*
 *  backup.c
 *
 *  Copyright (c) 2006-2011 Pacman Development Team <pacman-dev@archlinux.org>
 *  Copyright (c) 2005 by Judd Vinet <jvinet@zeroflux.org>
 *  Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
 *  Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
 *  Copyright (c) 2006 by Miklos Vajna <vmiklos@frugalware.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/>.
 */

#include "config.h"

#include <stdlib.h>
#include <string.h>

/* libalpm */
#include "backup.h"
#include "alpm_list.h"
#include "log.h"
#include "util.h"

/* split a backup string "file\thash" into the relevant components */
int _alpm_split_backup(const char *string, alpm_backup_t **backup)
{
  char *str, *ptr;

  STRDUP(str, string, return -1);

  /* tab delimiter */
  ptr = str ? strchr(str, '\t') : NULL;
  if(ptr == NULL) {
    (*backup)->name = str;
    (*backup)->hash = NULL;
    return 0;
  }
  *ptr = '\0';
  ptr++;
  /* now str points to the filename and ptr points to the hash */
  STRDUP((*backup)->name, str, return -1);
  STRDUP((*backup)->hash, ptr, return -1);
  FREE(str);
  return 0;
}

/* Look for a filename in a alpm_pkg_t.backup list. If we find it,
 * then we return the full backup entry.
 */
alpm_backup_t *_alpm_needbackup(const char *file, const alpm_list_t *backup_list)
{
  const alpm_list_t *lp;

  if(file == NULL || backup_list == NULL) {
    return NULL;
  }

  /* run through the backup list and parse out the hash for our file */
  for(lp = backup_list; lp; lp = lp->next) {
    alpm_backup_t *backup = lp->data;

    if(strcmp(file, backup->name) == 0) {
      return backup;
    }
  }

  return NULL;
}

void _alpm_backup_free(alpm_backup_t *backup)
{
  free(backup->name);
  free(backup->hash);
  free(backup);
}

alpm_backup_t *_alpm_backup_dup(const alpm_backup_t *backup)
{
  alpm_backup_t *newbackup;
  CALLOC(newbackup, 1, sizeof(alpm_backup_t), return NULL);

  STRDUP(newbackup->name, backup->name, return NULL);
  STRDUP(newbackup->hash, backup->hash, return NULL);

  return newbackup;
}

/* vim: set ts=2 sw=2 noet: */