Abdelrahman Said
48 lines
1.8 KiB
C
48 lines
1.8 KiB
C
/*
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igraph library.
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Copyright (C) 2009-2025 The igraph development team <igraph@igraph.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef IGRAPH_PSUMTREE_H
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#define IGRAPH_PSUMTREE_H
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#include "igraph_decls.h"
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#include "igraph_error.h"
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#include "igraph_vector.h"
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IGRAPH_BEGIN_C_DECLS
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typedef struct {
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igraph_vector_t v;
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igraph_int_t size;
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igraph_int_t offset;
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} igraph_psumtree_t;
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IGRAPH_EXPORT igraph_error_t igraph_psumtree_init(igraph_psumtree_t *t, igraph_int_t size);
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IGRAPH_EXPORT void igraph_psumtree_reset(igraph_psumtree_t *t);
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IGRAPH_EXPORT void igraph_psumtree_destroy(igraph_psumtree_t *t);
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IGRAPH_EXPORT IGRAPH_FUNCATTR_PURE igraph_real_t igraph_psumtree_get(const igraph_psumtree_t *t, igraph_int_t idx);
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IGRAPH_EXPORT IGRAPH_FUNCATTR_PURE igraph_int_t igraph_psumtree_size(const igraph_psumtree_t *t);
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IGRAPH_EXPORT igraph_error_t igraph_psumtree_search(const igraph_psumtree_t *t, igraph_int_t *idx,
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igraph_real_t elem);
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IGRAPH_EXPORT igraph_error_t igraph_psumtree_update(igraph_psumtree_t *t, igraph_int_t idx,
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igraph_real_t new_value);
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IGRAPH_EXPORT IGRAPH_FUNCATTR_PURE igraph_real_t igraph_psumtree_sum(const igraph_psumtree_t *t);
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IGRAPH_END_C_DECLS
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#endif
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