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/*
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* This file is a part of Poly2Tri-C
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* (c) Barak Itkin <lightningismyname@gmail.com>
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* http://code.google.com/p/poly2tri-c/
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Poly2Tri nor the names of its contributors may be
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* used to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <glib.h>
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#include "pslg.h"
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static void
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free_bounded_line_if_not_null (gpointer line)
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{
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p2tr_bounded_line_free ((P2trBoundedLine*)line);
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}
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/* A PSLG which is essentially a set of lines, will be represented by a
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* hash table. When it will have an entry where both key and value are
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* a line, it means that this is a new line and therefore should be
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* freed. When it has an entry where the key is a line and the value is
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* NULL, it means this is a line that should not be freed.
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* This behaiour will be acheived by a NULL key free function and a
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* real free function for values */
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P2trPSLG*
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p2tr_pslg_new (void)
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{
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return g_hash_table_new_full (NULL, NULL, NULL, free_bounded_line_if_not_null);
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}
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void
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p2tr_pslg_add_new_line (P2trPSLG *pslg,
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const P2trVector2 *start,
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const P2trVector2 *end)
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{
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P2trBoundedLine *line = p2tr_bounded_line_new (start, end);
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/* We would like to free this line, so also add it as a value */
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g_hash_table_insert (pslg, line, line);
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}
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/* Add a line that needs not to be freed */
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void
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p2tr_pslg_add_existing_line (P2trPSLG *pslg,
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const P2trBoundedLine *line)
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{
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g_hash_table_insert (pslg, (P2trBoundedLine*) line, NULL);
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}
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guint
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p2tr_pslg_size (P2trPSLG *pslg)
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{
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return g_hash_table_size (pslg);
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}
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void
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p2tr_pslg_iter_init (P2trPSLGIter *iter,
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P2trPSLG *pslg)
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{
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g_hash_table_iter_init (iter, pslg);
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}
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gboolean
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p2tr_pslg_iter_next (P2trPSLGIter *iter,
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const P2trBoundedLine **line)
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{
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/* The values are always stored in the key */
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return g_hash_table_iter_next (iter, (gpointer*)line, NULL);
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}
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gboolean
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p2tr_pslg_contains_line (P2trPSLG *pslg,
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const P2trBoundedLine *line)
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{
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return g_hash_table_lookup_extended (pslg, line, NULL, NULL);
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}
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void
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p2tr_pslg_free (P2trPSLG *pslg)
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{
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g_hash_table_destroy (pslg);
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}
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