--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/harfbuzz/src/gen-arabic-joining-list.py	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,106 @@
+#!/usr/bin/env python3
+
+"""usage: ./gen-arabic-joining-table.py ArabicShaping.txt Scripts.txt
+
+Input files:
+* https://unicode.org/Public/UCD/latest/ucd/ArabicShaping.txt
+* https://unicode.org/Public/UCD/latest/ucd/Scripts.txt
+"""
+
+import os.path, sys
+
+if len (sys.argv) != 3:
+	sys.exit (__doc__)
+
+files = [open (x, encoding='utf-8') for x in sys.argv[1:]]
+
+headers = [[f.readline (), f.readline ()] for f in files]
+while files[0].readline ().find ('##################') < 0:
+	pass
+
+def read (f):
+	mapping = {}
+	for line in f:
+
+		j = line.find ('#')
+		if j >= 0:
+			line = line[:j]
+
+		fields = [x.strip () for x in line.split (';')]
+		if len (fields) == 1:
+			continue
+
+		uu = fields[0].split ('..')
+		start = int (uu[0], 16)
+		if len (uu) == 1:
+			end = start
+		else:
+			end = int (uu[1], 16)
+
+		t = fields[1]
+
+		for u in range (start, end + 1):
+			mapping[u] = t
+
+	return mapping
+
+def read_joining_uu (f):
+	values = set ()
+	for line in f:
+
+		if line[0] == '#':
+			continue
+
+		fields = [x.strip () for x in line.split (';')]
+		if len (fields) == 1:
+			continue
+		if fields[2] in {'T', 'U'}:
+			continue
+
+		values.add (int (fields[0], 16))
+
+	return sorted (values)
+
+def print_has_arabic_joining (scripts, joining_uu):
+
+	print ("static bool")
+	print ("has_arabic_joining (hb_script_t script)")
+	print ("{")
+	print ("  /* List of scripts that have data in arabic-table. */")
+	print ("  switch ((int) script)")
+	print ("  {")
+
+	for script in sorted ({scripts[u] for u in joining_uu if scripts[u] not in {'Common', 'Inherited'}}):
+		print ("    case HB_SCRIPT_{}:".format (script.upper ()))
+
+	print ("      return true;")
+	print ()
+	print ("    default:")
+	print ("      return false;")
+	print ("  }")
+	print ("}")
+	print ()
+
+print ("/* == Start of generated function == */")
+print ("/*")
+print (" * The following function is generated by running:")
+print (" *")
+print (" *   ./gen-arabic-joining-list.py ArabicShaping.txt Scripts.txt")
+print (" *")
+print (" * on files with these headers:")
+print (" *")
+for h in headers:
+	for l in h:
+		print (" * %s" % (l.strip ()))
+print (" */")
+print ()
+print ("#ifndef HB_OT_SHAPER_ARABIC_JOINING_LIST_HH")
+print ("#define HB_OT_SHAPER_ARABIC_JOINING_LIST_HH")
+print ()
+
+print_has_arabic_joining (read (files[1]), read_joining_uu (files[0]))
+
+print ()
+print ("#endif /* HB_OT_SHAPER_ARABIC_JOINING_LIST_HH */")
+print ()
+print ("/* == End of generated function == */")