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/*************************************************************************
* Copyright (C) 2009-2010 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension 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 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension 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 program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* Generic maps (backend for pigment_maps, etc.).
*/
/** A map. */
typedef struct dmnsn_map {
dmnsn_free_fn *free_fn; /**< Destructor callback. */
size_t obj_size; /**< @internal The size of the mapped objects. */
dmnsn_array *array; /**< @internal The map entries. */
} dmnsn_map;
/**
* Create an empty map.
* @param[in] size The size of the objects to store in the map.
* @return A map with no entries.
*/
dmnsn_map *dmnsn_new_map(size_t size);
/**
* Delete a map.
* @param[in,out] map The map to delete.
*/
void dmnsn_delete_map(dmnsn_map *map);
/**
* Add an entry (a scalar-object pair) to a map.
* @param[in,out] map The map to add to.
* @param[in] n The index of the entry.
* @param[in] obj The value of the entry.
*/
void dmnsn_add_map_entry(dmnsn_map *map, double n, const void *obj);
/**
* Return the number of entries in a map.
* @param[in] map The map to measure.
* @return The size of \p map.
*/
size_t dmnsn_map_size(const dmnsn_map *map);
/**
* Evaluate a map.
* @param[in] map The map to evaluate.
* @param[in] n The index to evaluate.
* @param[out] val The normalized distance of \p n from \p obj1.
* @param[out] obj1 The first object.
* @param[out] obj2 The second object.
*/
void dmnsn_evaluate_map(const dmnsn_map *map, double n,
double *val, void *obj1, void *obj2);
/**
* Apply a callback to each element of a map.
* @param[in,out] map The map.
* @param[in] callback The callback to apply to the elements.
*/
void dmnsn_map_apply(dmnsn_map *map, dmnsn_callback_fn *callback);
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