1 files changed, 83 insertions, 0 deletions
diff --git a/third_party/harfbuzz-ng/src/gen-arabic-joining-table.py b/third_party/harfbuzz-ng/src/gen-arabic-joining-table.py
new file mode 100755
index 0000000..08e54db
--- /dev/null
+++ b/third_party/harfbuzz-ng/src/gen-arabic-joining-table.py
@@ -0,0 +1,83 @@
+#!/usr/bin/python
+
+import sys
+
+header = sys.stdin.readline (), sys.stdin.readline ()
+while sys.stdin.readline ().find ('##################') < 0:
+	pass
+
+
+print "/* == Start of generated table == */"
+print "/*"
+print " * The following table is generated by running:"
+print " *"
+print " *   ./gen-arabic-joining-table.py < ArabicShaping.txt"
+print " *"
+print " * on the ArabicShaping.txt file with the header:"
+print " *"
+for line in header:
+	print " * %s" % (line.strip())
+print " */"
+
+print "static const uint8_t joining_table[] ="
+print "{"
+
+
+min_u = 0x110000
+max_u = 0
+num = 0
+last = -1
+block = ''
+for line in sys.stdin:
+	
+	if line[0] == '#':
+		if line.find (" characters"):
+			block = line[2:].strip ()
+		continue
+
+	fields = [x.strip () for x in line.split (';')]
+	if len (fields) == 1:
+		continue
+
+	u = int (fields[0], 16)
+	if u == 0x200C or u == 0x200D:
+		continue
+	if u < last:
+		raise Exception ("Input data character not sorted", u)
+	min_u = min (min_u, u)
+	max_u = max (max_u, u)
+	num += 1
+
+	if block:
+		print "\n  /* %s */\n" % block
+		block = ''
+
+	if last != -1:
+		last += 1
+		while last < u:
+			print "  JOINING_TYPE_X, /* %04X */" % last
+			last += 1
+	else:
+		last = u
+
+	if fields[3] in ["ALAPH", "DALATH RISH"]:
+		value = "JOINING_GROUP_" + fields[3].replace(' ', '_')
+	else:
+		value = "JOINING_TYPE_" + fields[2]
+	print "  %s, /* %s */" % (value, '; '.join(fields))
+
+print
+print "  JOINING_TYPE_X  /* dummy */"
+print "};"
+print
+
+print "#define JOINING_TABLE_FIRST	0x%04x" % min_u
+print "#define JOINING_TABLE_LAST	0x%04x" % max_u
+print
+
+print "/* == End of generated table == */"
+
+occupancy = num * 100 / (max_u - min_u + 1)
+# Maintain at least 40% occupancy in the table */
+if occupancy < 40:
+	raise Exception ("Table too sparse, please investigate: ", occupancy)