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49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
// Copyright 2022 Dietrich Epp.
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// This file is part of SyncFiles. SyncFiles is licensed under the terms of the
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// Mozilla Public License, version 2.0. See LICENSE.txt for details.
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#ifndef SYNC_TREE_H
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#define SYNC_TREE_H
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/* tree.h - binary search trees of file metadata */
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#include "sync/meta.h"
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/* A reference to a file node by 1-based index, or 0 for none. */
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typedef int FileRef;
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typedef enum {
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kNodeBlack,
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kNodeRed,
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} NodeColor;
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/* A file record stored in a binary search tree. */
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struct FileNode {
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/* The sort key. This is a case-folded version of the local filename. */
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FileName key;
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struct FileRec file;
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/* The root of the tree for the directory contents, if this is a
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directory. */
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FileRef directory_root;
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/* Binary search tree bookkeeping. */
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NodeColor color;
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FileRef children[2];
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};
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/* Binary search tree of files. */
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struct FileTree {
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struct FileNode **nodes;
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Size count;
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Size alloc;
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FileRef root;
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};
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/* Insert a node into the tree with the given key. On success, return a positive
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FileRef. On failure, return a negative error code. To get the error code
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value, negate the function result. */
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FileRef TreeInsert(struct FileTree *tree, FileRef directory,
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const FileName *key);
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#endif
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