63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
// Copyright (C) 2004-2021 Artifex Software, Inc.
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//
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// This file is part of MuPDF.
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//
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// MuPDF is free software: you can redistribute it and/or modify it under the
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// terms of the GNU Affero General Public License as published by the Free
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// Software Foundation, either version 3 of the License, or (at your option)
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// any later version.
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//
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// MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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// details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
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//
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// Alternative licensing terms are available from the licensor.
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// For commercial licensing, see <https://www.artifex.com/> or contact
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// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
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// CA 94129, USA, for further information.
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#ifndef MUPDF_FITZ_TREE_H
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#define MUPDF_FITZ_TREE_H
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#include "mupdf/fitz/system.h"
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#include "mupdf/fitz/context.h"
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/**
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AA-tree to look up things by strings.
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*/
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typedef struct fz_tree fz_tree;
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/**
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Look for the value of a node in the tree with the given key.
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Simple pointer equivalence is used for key.
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Returns NULL for no match.
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*/
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void *fz_tree_lookup(fz_context *ctx, fz_tree *node, const char *key);
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/**
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Insert a new key/value pair and rebalance the tree.
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Return the new root of the tree after inserting and rebalancing.
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May be called with a NULL root to create a new tree.
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No data is copied into the tree structure; key and value are
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merely kept as pointers.
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*/
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fz_tree *fz_tree_insert(fz_context *ctx, fz_tree *root, const char *key, void *value);
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/**
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Drop the tree.
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The storage used by the tree is freed, and each value has
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dropfunc called on it.
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*/
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void fz_drop_tree(fz_context *ctx, fz_tree *node, void (*dropfunc)(fz_context *ctx, void *value));
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#endif
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