1#!/usr/bin/python
2
3import sys
4
5if len (sys.argv) != 4:
6	print >>sys.stderr, "usage: ./gen-indic-table.py IndicSyllabicCategory.txt IndicMatraCategory.txt Blocks.txt"
7	sys.exit (1)
8
9BLACKLISTED_BLOCKS = ["Thai", "Lao", "Tibetan"]
10
11files = [file (x) for x in sys.argv[1:]]
12
13headers = [[f.readline () for i in range (2)] for f in files]
14
15data = [{} for f in files]
16values = [{} for f in files]
17for i, f in enumerate (files):
18	for line in f:
19
20		j = line.find ('#')
21		if j >= 0:
22			line = line[:j]
23
24		fields = [x.strip () for x in line.split (';')]
25		if len (fields) == 1:
26			continue
27
28		uu = fields[0].split ('..')
29		start = int (uu[0], 16)
30		if len (uu) == 1:
31			end = start
32		else:
33			end = int (uu[1], 16)
34
35		t = fields[1]
36
37		for u in range (start, end + 1):
38			data[i][u] = t
39		values[i][t] = values[i].get (t, 0) + end - start + 1
40
41# Merge data into one dict:
42defaults = ('Other', 'Not_Applicable', 'No_Block')
43for i,v in enumerate (defaults):
44	values[i][v] = values[i].get (v, 0) + 1
45combined = {}
46for i,d in enumerate (data):
47	for u,v in d.items ():
48		if i == 2 and not u in combined:
49			continue
50		if not u in combined:
51			combined[u] = list (defaults)
52		combined[u][i] = v
53combined = {k:v for k,v in combined.items() if v[2] not in BLACKLISTED_BLOCKS}
54data = combined
55del combined
56num = len (data)
57
58for u in [0x17CD, 0x17CE, 0x17CF, 0x17D0, 0x17D3]:
59	if data[u][0] == 'Other':
60		data[u][0] = "Vowel_Dependent"
61
62# Move the outliers NO-BREAK SPACE and DOTTED CIRCLE out
63singles = {}
64for u in [0x00A0, 0x25CC]:
65	singles[u] = data[u]
66	del data[u]
67
68print "/* == Start of generated table == */"
69print "/*"
70print " * The following table is generated by running:"
71print " *"
72print " *   ./gen-indic-table.py IndicSyllabicCategory.txt IndicMatraCategory.txt Blocks.txt"
73print " *"
74print " * on files with these headers:"
75print " *"
76for h in headers:
77	for l in h:
78		print " * %s" % (l.strip())
79print " */"
80print
81print '#include "hb-ot-shape-complex-indic-private.hh"'
82print
83
84# Shorten values
85short = [{
86	"Bindu":		'Bi',
87	"Cantillation_Mark":	'Ca',
88	"Joiner":		'ZWJ',
89	"Non_Joiner":		'ZWNJ',
90	"Number":		'Nd',
91	"Visarga":		'Vs',
92	"Vowel":		'Vo',
93	"Vowel_Dependent":	'M',
94	"Other":		'x',
95},{
96	"Not_Applicable":	'x',
97}]
98all_shorts = [{},{}]
99
100# Add some of the values, to make them more readable, and to avoid duplicates
101
102
103for i in range (2):
104	for v,s in short[i].items ():
105		all_shorts[i][s] = v
106
107what = ["INDIC_SYLLABIC_CATEGORY", "INDIC_MATRA_CATEGORY"]
108what_short = ["ISC", "IMC"]
109for i in range (2):
110	print
111	vv = values[i].keys ()
112	vv.sort ()
113	for v in vv:
114		v_no_and = v.replace ('_And_', '_')
115		if v in short[i]:
116			s = short[i][v]
117		else:
118			s = ''.join ([c for c in v_no_and if ord ('A') <= ord (c) <= ord ('Z')])
119			if s in all_shorts[i]:
120				raise Exception ("Duplicate short value alias", v, all_shorts[i][s])
121			all_shorts[i][s] = v
122			short[i][v] = s
123		print "#define %s_%s	%s_%s	%s/* %3d chars; %s */" % \
124			(what_short[i], s, what[i], v.upper (), \
125			'	'* ((48-1 - len (what[i]) - 1 - len (v)) / 8), \
126			values[i][v], v)
127print
128print "#define _(S,M) INDIC_COMBINE_CATEGORIES (ISC_##S, IMC_##M)"
129print
130print
131
132total = 0
133used = 0
134last_block = None
135def print_block (block, start, end, data):
136	global total, used, last_block
137	if block and block != last_block:
138		print
139		print
140		print "  /* %s */" % block
141	num = 0
142	assert start % 8 == 0
143	assert (end+1) % 8 == 0
144	for u in range (start, end+1):
145		if u % 8 == 0:
146			print
147			print "  /* %04X */" % u,
148		if u in data:
149			num += 1
150		d = data.get (u, defaults)
151		sys.stdout.write ("%9s" % ("_(%s,%s)," % (short[0][d[0]], short[1][d[1]])))
152
153	total += end - start + 1
154	used += num
155	if block:
156		last_block = block
157
158uu = data.keys ()
159uu.sort ()
160
161last = -100000
162num = 0
163offset = 0
164starts = []
165ends = []
166print "static const INDIC_TABLE_ELEMENT_TYPE indic_table[] = {"
167for u in uu:
168	if u <= last:
169		continue
170	block = data[u][2]
171
172	start = u//8*8
173	end = start+1
174	while end in uu and block == data[end][2]:
175		end += 1
176	end = (end-1)//8*8 + 7
177
178	if start != last + 1:
179		if start - last <= 1+16*3:
180			print_block (None, last+1, start-1, data)
181			last = start-1
182		else:
183			if last >= 0:
184				ends.append (last + 1)
185				offset += ends[-1] - starts[-1]
186			print
187			print
188			print "#define indic_offset_0x%04xu %d" % (start, offset)
189			starts.append (start)
190
191	print_block (block, start, end, data)
192	last = end
193ends.append (last + 1)
194offset += ends[-1] - starts[-1]
195print
196print
197occupancy = used * 100. / total
198page_bits = 12
199print "}; /* Table items: %d; occupancy: %d%% */" % (offset, occupancy)
200print
201print "INDIC_TABLE_ELEMENT_TYPE"
202print "hb_indic_get_categories (hb_codepoint_t u)"
203print "{"
204print "  switch (u >> %d)" % page_bits
205print "  {"
206pages = set([u>>page_bits for u in starts+ends+singles.keys()])
207for p in sorted(pages):
208	print "    case 0x%0Xu:" % p
209	for (start,end) in zip (starts, ends):
210		if p not in [start>>page_bits, end>>page_bits]: continue
211		offset = "indic_offset_0x%04xu" % start
212		print "      if (hb_in_range (u, 0x%04Xu, 0x%04Xu)) return indic_table[u - 0x%04Xu + %s];" % (start, end, start, offset)
213	for u,d in singles.items ():
214		if p != u>>page_bits: continue
215		print "      if (unlikely (u == 0x%04Xu)) return _(%s,%s);" % (u, short[0][d[0]], short[1][d[1]])
216	print "      break;"
217	print ""
218print "    default:"
219print "      break;"
220print "  }"
221print "  return _(x,x);"
222print "}"
223print
224print "#undef _"
225for i in range (2):
226	print
227	vv = values[i].keys ()
228	vv.sort ()
229	for v in vv:
230		print "#undef %s_%s" % \
231			(what_short[i], short[i][v])
232print
233print "/* == End of generated table == */"
234
235# Maintain at least 30% occupancy in the table */
236if occupancy < 30:
237	raise Exception ("Table too sparse, please investigate: ", occupancy)
238