remove unneeded code

src/dat/mcx.c

@@ -14,7 +14,7 @@ static void mvchunks(u8 *restrict buf, u8 *src, u8 *dst, int src_s, int src_e) {
 	assert(src > dst);
 	u32 *table = (u32 *)buf;
 	size_t len = src - dst; // acquire the amount of bytes that we shall move
-	assert(len % 0x1000);
+	assert(!(len % 0x1000));
 
 	// count how many bytes we need to move, whilst updating location data
 	size_t blen = 0;
@@ -69,7 +69,8 @@ size_t mcx_delchunk_range(u8 *restrict buf, int start, int end) {
 	}
 
 	// move the remaining chunks down
-	mvchunks(buf, src, dst, start, end);
+	if (end < 0x3FF)
+		mvchunks(buf, src, dst, end, 0x3FF);
 	return src - dst;
 }
 
@@ -103,19 +104,3 @@ size_t mcx_calcsize(const u8 *restrict buf) {
 		size += *(buf + (i * 4) + 3);
 	return (size * 0x1000) + 0x2000;
 }
-
-/* an `*.mcX` contains a `0x2000` byte long table, the first `0x1000` containing
- * `0x400` entries of chunk data.
- * This chunk data is big-endian, where bytes `0xFFFFFF00` represent the `0x1000` sector offset.
- * From the start, and bytes `0x000000FF` represent the length in `0x1000` sectors. */
-void mcx_index(const u8 *restrict buf, struct mcx_chunk *restrict chunks) {
-	const u32 *ptr = (u32 *)buf;
-	for (uint i = 0; i < 0x400; i++) {
-		u32 dat = be32toh(ptr[i]);
-		chunks[i] = (struct mcx_chunk){
-			.idx = (dat >> 8) * 0x1000,
-			.len = (dat & 0xFF) * 0x1000,
-			.time = be32toh(ptr[i + 0x400]),
-		};
-	}
-}

src/dat/mcx.h

@@ -35,22 +35,3 @@ size_t mcx_delchunk_bulk(u8 *restrict buf, const u16 *restrict chunks, int chunk
 
 /* Computes the byte size of the `*.mcX` file in `buf` and returns it. */
 size_t mcx_calcsize(const u8 *restrict buf) NONNULL((1)) PURE;
-
-/* indexes the chunks in an `*.mcX` file, writing `0x400` of entries to `chunks` */
-void mcx_index(const u8 *restrict buf, struct mcx_chunk *restrict chunks) NONNULL((1, 2));
-
-/* the MCR (Minecraft region) and MCA (Minecraft anvil) files are similar
- * MCA is the newer variant, where it includes:
- *  - a world height of 256, rather than 128.
- *  - block IDs have been extended to 4096 from 256
- *  - block ordering is now YZX, rather than XZY.
- *  - biomes are included in the data per XZ column.
- * MCR start with an 8KiB header, split in two 4KiB tables
- * - the first containing the offsets of chunks in the region file itself.
- * - the second providing timestamps on when they were last updated.
- * -
- *
- *
- *
- *
- */