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1#!/usr/bin/env python3
2
3"""usage: ./gen-arabic-joining-table.py ArabicShaping.txt Scripts.txt
4
5Input files:
6* https://unicode.org/Public/UCD/latest/ucd/ArabicShaping.txt
7* https://unicode.org/Public/UCD/latest/ucd/Scripts.txt
8"""
9
10import os.path, sys
11
12if len (sys.argv) != 3:
13	sys.exit (__doc__)
14
15files = [open (x, encoding='utf-8') for x in sys.argv[1:]]
16
17headers = [[f.readline (), f.readline ()] for f in files]
18while files[0].readline ().find ('##################') < 0:
19	pass
20
21def read (f):
22	mapping = {}
23	for line in f:
24
25		j = line.find ('#')
26		if j >= 0:
27			line = line[:j]
28
29		fields = [x.strip () for x in line.split (';')]
30		if len (fields) == 1:
31			continue
32
33		uu = fields[0].split ('..')
34		start = int (uu[0], 16)
35		if len (uu) == 1:
36			end = start
37		else:
38			end = int (uu[1], 16)
39
40		t = fields[1]
41
42		for u in range (start, end + 1):
43			mapping[u] = t
44
45	return mapping
46
47def read_joining_uu (f):
48	values = set ()
49	for line in f:
50
51		if line[0] == '#':
52			continue
53
54		fields = [x.strip () for x in line.split (';')]
55		if len (fields) == 1:
56			continue
57		if fields[2] in {'T', 'U'}:
58			continue
59
60		values.add (int (fields[0], 16))
61
62	return sorted (values)
63
64def print_has_arabic_joining (scripts, joining_uu):
65
66	print ("static bool")
67	print ("has_arabic_joining (hb_script_t script)")
68	print ("{")
69	print ("  /* List of scripts that have data in arabic-table. */")
70	print ("  switch ((int) script)")
71	print ("  {")
72
73	for script in sorted ({scripts[u] for u in joining_uu if scripts[u] not in {'Common', 'Inherited'}}):
74		print ("    case HB_SCRIPT_{}:".format (script.upper ()))
75
76	print ("      return true;")
77	print ()
78	print ("    default:")
79	print ("      return false;")
80	print ("  }")
81	print ("}")
82	print ()
83
84print ("/* == Start of generated function == */")
85print ("/*")
86print (" * The following function is generated by running:")
87print (" *")
88print (" *   ./gen-arabic-joining-list.py ArabicShaping.txt Scripts.txt")
89print (" *")
90print (" * on files with these headers:")
91print (" *")
92for h in headers:
93	for l in h:
94		print (" * %s" % (l.strip ()))
95print (" */")
96print ()
97print ("#ifndef HB_OT_SHAPE_COMPLEX_ARABIC_JOINING_LIST_HH")
98print ("#define HB_OT_SHAPE_COMPLEX_ARABIC_JOINING_LIST_HH")
99print ()
100
101print_has_arabic_joining (read (files[1]), read_joining_uu (files[0]))
102
103print ()
104print ("#endif /* HB_OT_SHAPE_COMPLEX_ARABIC_JOINING_LIST_HH */")
105print ()
106print ("/* == End of generated function == */")
107