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/**
* @file
* Public interface for returning the differences in MLS ranges.
* Obtain a range difference object from its respective policy
* component (e.g., a user's assigned range). The individual level
* difference querying functions are in the level_diff.h header.
*
* @author Jeremy A. Mowery jmowery@tresys.com
* @author Jason Tang jtang@tresys.com
*
* Copyright (C) 2007 Tresys Technology, LLC
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef POLDIFF_RANGE_DIFF_H
#define POLDIFF_RANGE_DIFF_H
#ifdef __cplusplus
extern "C"
{
#endif
#include <apol/mls-query.h>
#include <apol/vector.h>
#include <poldiff/poldiff.h>
typedef struct poldiff_range poldiff_range_t;
/**
* Allocate and return a string that represents the differences
* encoded by the given range. The returned string is suitable for
* embedding within another item's to_string() display.
*
* @param diff Poldiff diff structure containing policies.
* @param range Range object to render.
*
* @return Rendered string, or NULL upon error. Caller must free()
* string afterwards.
*/
char *poldiff_range_to_string_brief(const poldiff_t * diff, const poldiff_range_t * range);
/**
* Get the vector of level differences from a range diffence object.
*
* @param range Range object to query.
*
* @return A vector of elements of type poldiff_level_t, or NULL on
* error. The caller should <b>not</b> modify the returned vector.
*/
extern apol_vector_t *poldiff_range_get_levels(const poldiff_range_t * range);
/**
* Get the original item's range. This could represent a user's
* original assigned range or the original target range for a
* range_transition. If there was no original range (such as for
* items that are added) then this returns NULL.
*
* @param range Range object to query.
*
* @return Original range, or NULL upon error or no range available.
* The caller should <b>not</b> modify the returned object.
*/
extern const apol_mls_range_t *poldiff_range_get_original_range(const poldiff_range_t * range);
/**
* Get the modified item's range. This could represent a user's
* modified assigned range or the modified target range for a
* range_transition. If there was no original range (such as for
* items that are removed) then this returns NULL.
*
* @param range Range object to query.
*
* @return Modified range, or NULL upon error or no range available.
* The caller should <b>not</b> modify the returned object.
*/
extern const apol_mls_range_t *poldiff_range_get_modified_range(const poldiff_range_t * range);
/**
* Get the vector of categories added to the minimum set from a range
* diffence object.
*
* @param range Range object to query.
*
* @return A vector of elements of type string, or NULL on
* error. The caller should <b>not</b> modify the returned vector.
*/
extern apol_vector_t *poldiff_range_get_min_added_cats(const poldiff_range_t * range);
/**
* Get the vector of categories removed from the minimum set from a
* range diffence object.
*
* @param range Range object to query.
*
* @return A vector of elements of type string, or NULL on
* error. The caller should <b>not</b> modify the returned vector.
*/
extern apol_vector_t *poldiff_range_get_min_removed_cats(const poldiff_range_t * range);
/**
* Get the vector of unmodified categories of the minimum set from a
* range diffence object.
*
* @param range Range object to query.
*
* @return A vector of elements of type string, or NULL on
* error. The caller should <b>not</b> modify the returned vector.
*/
extern apol_vector_t *poldiff_range_get_min_unmodified_cats(const poldiff_range_t * range);
#ifdef __cplusplus
}
#endif
#endif /* POLDIFF_RANGE_DIFF_H */
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