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42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
// Copyright (c) 2025 Quinn
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// Licensed under the MIT Licence. See LICENSE for details
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#pragma once
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#include <stdlib.h>
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#include "../util/atrb.h"
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#include "../util/intdef.h"
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/* contains chunk metadata */
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struct mcx_chunk {
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size_t idx; // byte offset for start of chunk data
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u32 len; // byte length of chunk (+ padding)
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u32 time; // modification time in epoch seconds
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};
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// TODO: should return some form of feedback about its success
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/* Deletes chunk `idx` from `buf`, moving all chunks downwards in the process. */
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void mcx_delchunk(u8 *restrict buf, int idx);
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/* Computes the byte size of the `*.mcX` file in `buf` and returns it. */
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size_t mcx_calcsize(const u8 *restrict buf) NONNULL((1)) PURE;
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/* indexes the chunks in an `*.mcX` file, writing `0x400` of entries to `chunks` */
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void mcx_index(const u8 *restrict buf, struct mcx_chunk *restrict chunks) NONNULL((1, 2));
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/* the MCR (Minecraft region) and MCA (Minecraft anvil) files are similar
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* MCA is the newer variant, where it includes:
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* - a world height of 256, rather than 128.
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* - block IDs have been extended to 4096 from 256
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* - block ordering is now YZX, rather than XZY.
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* - biomes are included in the data per XZ column.
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* MCR start with an 8KiB header, split in two 4KiB tables
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* - the first containing the offsets of chunks in the region file itself.
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* - the second providing timestamps on when they were last updated.
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* -
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*
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*
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*
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*
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*/
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