feat: publish FreeRTOS C FC02 card

vendor/Hazard3/scripts/ckcompress

@@ -0,0 +1,119 @@
+#!/usr/bin/env python3
+
+# Based on Commander Keen compresssion algorithm (a variant of LZSS)
+
+import sys
+import argparse
+
+def get_symbol(data, window):
+	it = iter(data)
+	needle = bytearray([next(it)])
+	try:
+		while window.find(needle) >= 0:
+			needle.append(next(it))
+	except StopIteration:
+		pass
+
+	matchlen = len(needle) - 1
+	if matchlen <= 1:
+		return (1, (False, needle[0]))
+	else:
+		matchpos = len(window) - 1 - window.find(needle[:-1])
+		return (matchlen, (True, matchpos, matchlen - 1))
+
+def iter_symbols(data, windowsize):
+	data = data[:]
+	window = bytearray()
+
+	while True:
+		consumed, symbol = get_symbol(data, window)
+		yield symbol
+		del window[:max(0, len(window) + consumed - windowsize)]
+		window.extend(data[:consumed])
+		del data[:consumed]
+
+def bitmap(bits):
+	bm = 0
+	for i, bit in enumerate(bits):
+		bm = bm | (bool(bit) << i)
+	return bm
+
+def iter_bytes(data, windowsize):
+	syms = iter(iter_symbols(data, windowsize))
+	holding = []
+	eof = False
+	while not eof:
+		try:
+			holding.append(next(syms))
+		except StopIteration:
+			eof = True
+		if eof and len(holding) or len(holding) >= 8:
+			yield bitmap(sym[0] for sym in holding)
+			for sym in holding:
+				yield from sym[1:]
+			holding.clear()
+
+def compress(data, windowsize):
+	return bytearray(iter_bytes(data, windowsize))
+
+def decompress(cdata, windowsize):
+	out = bytearray()
+	window = bytearray()
+	symbolcount = 0
+	it = iter(cdata)
+	while True:
+		if symbolcount == 0:
+			try:
+				bitmap = next(it)
+			except StopIteration:
+				break
+			symbolcount = 7
+		else:
+			symbolcount -= 1
+		if bitmap & 1:
+			start = len(window) - 1 - next(it)
+			count = next(it) + 1
+			new = window[start:start + count]
+			out.extend(new)
+			window.extend(new)
+		else:
+			try:
+				lit = next(it)
+			except StopIteration:
+				break
+			window.append(lit)
+			out.append(lit)
+		del window[:max(0, len(window) - windowsize)]
+		bitmap = bitmap >> 1
+
+	return out
+
+
+if __name__ == "__main__":
+	parser = argparse.ArgumentParser(formatter_class=argparse.RawDescriptionHelpFormatter)
+	parser.add_argument("input", help="Input file name")
+	parser.add_argument("output", help="Output file name")
+	parser.add_argument("-d", "--decompress", action="store_true", help="Decompress input (default is to compress)")
+	parser.add_argument("-w", "--window", help="Compression window size")
+	args = parser.parse_args()
+	if args.input == "-":
+		ifile = sys.stdin
+	else:
+		ifile = open(args.input, "rb")
+	if args.output == "-":
+		ofile = sys.stdout
+	else:
+		ofile = open(args.output, "wb")
+	if args.window is None:
+		args.window = 256
+
+	ibuf = bytearray(ifile.read())
+	ifile.close()
+
+	if args.decompress:
+		obuf = decompress(ibuf, args.window)
+	else:
+		obuf = compress(ibuf, args.window)
+
+	ofile.write(obuf)
+	ofile.close()