static int unsigned(byte b) {
		return b < 0 ? b + 256 : b;
	}
Based on the lzss.c source in img4lib

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LZSS.C -- A Data Compression Program

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4/6/1989 Haruhiko Okumura

Use, distribution, and modify this program freely.

Please send me your improved versions.

PC-VAN SCIENCE

NIFTY-Serve PAF01022

CompuServe 74050,1022

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Ghidra/Features/FileFormats/src/main/java/ghidra/file/formats/lzss/LzssCodec.java