3 """usage: ./gen-arabic-table.py ArabicShaping.txt UnicodeData.txt Blocks.txt
6 * https://unicode.org/Public/UCD/latest/ucd/ArabicShaping.txt
7 * https://unicode.org/Public/UCD/latest/ucd/UnicodeData.txt
8 * https://unicode.org/Public/UCD/latest/ucd/Blocks.txt
13 if len (sys.argv) != 4:
16 files = [open (x, encoding='utf-8') for x in sys.argv[1:]]
18 headers = [[files[0].readline (), files[0].readline ()], [files[2].readline (), files[2].readline ()]]
19 headers.append (["UnicodeData.txt does not have a header."])
20 while files[0].readline ().find ('##################') < 0:
32 fields = [x.strip () for x in line.split (';')]
36 uu = fields[0].split ('..')
37 start = int (uu[0], 16)
45 for u in range (start, end + 1):
48 def print_joining_table(f):
56 fields = [x.strip () for x in line.split (';')]
60 u = int (fields[0], 16)
62 if fields[3] in ["ALAPH", "DALATH RISH"]:
63 value = "JOINING_GROUP_" + fields[3].replace(' ', '_')
65 value = "JOINING_TYPE_" + fields[2]
69 for value in sorted (set ([v for v in values.values ()] + ['JOINING_TYPE_X'])):
70 short = ''.join(x[0] for x in value.split('_')[2:])
71 assert short not in short_value.values()
72 short_value[value] = short
75 for value,short in short_value.items():
76 print ("#define %s %s" % (short, value))
78 uu = sorted(values.keys())
80 all_blocks = set([blocks[u] for u in uu])
85 if u - last <= 1+16*5:
92 print ("static const uint8_t joining_table[] =")
96 for start,end in ranges:
99 print ("#define joining_offset_0x%04xu %d" % (start, offset))
101 for u in range(start, end+1):
103 block = blocks.get(u, last_block)
104 value = values.get(u, "JOINING_TYPE_X")
106 if block != last_block or u == start:
109 if block in all_blocks:
110 print ("\n /* %s */" % block)
112 print ("\n /* FILLER */")
116 print (" /* %04X */" % (u//32*32), " " * (u % 32), end="")
120 print (" /* %04X */ " % u, end="")
121 print ("%s," % short_value[value], end="")
124 offset += end - start + 1
126 occupancy = num * 100. / offset
127 print ("}; /* Table items: %d; occupancy: %d%% */" % (offset, occupancy))
132 print ("static unsigned int")
133 print ("joining_type (hb_codepoint_t u)")
135 print (" switch (u >> %d)" % page_bits)
137 pages = set([u>>page_bits for u in [s for s,e in ranges]+[e for s,e in ranges]])
138 for p in sorted(pages):
139 print (" case 0x%0Xu:" % p)
140 for (start,end) in ranges:
141 if p not in [start>>page_bits, end>>page_bits]: continue
142 offset = "joining_offset_0x%04xu" % start
143 print (" if (hb_in_range<hb_codepoint_t> (u, 0x%04Xu, 0x%04Xu)) return joining_table[u - 0x%04Xu + %s];" % (start, end, start, offset))
152 for value,short in short_value.items():
153 print ("#undef %s" % (short))
156 def print_shaping_table(f):
163 fields = [x.strip () for x in line.split (';')]
164 if fields[5][0:1] != '<':
167 items = fields[5].split (' ')
168 shape, items = items[0][1:-1], tuple (int (x, 16) for x in items[1:])
170 if not shape in ['initial', 'medial', 'isolated', 'final']:
173 c = int (fields[0], 16)
175 # We only care about lam-alef ligatures
176 if len (items) != 2 or items[0] != 0x0644 or items[1] not in [0x0622, 0x0623, 0x0625, 0x0627]:
181 if items not in ligatures:
182 ligatures[items] = {}
183 ligatures[items][shape] = c
186 if items[0] not in names:
187 names[items[0]] = fields[1]
189 names[items[0]] = os.path.commonprefix ([names[items[0]], fields[1]]).strip ()
190 if items[0] not in shapes:
191 shapes[items[0]] = {}
192 shapes[items[0]][shape] = c
195 print ("static const uint16_t shaping_table[][4] =")
198 keys = shapes.keys ()
199 min_u, max_u = min (keys), max (keys)
200 for u in range (min_u, max_u + 1):
201 s = [shapes[u][shape] if u in shapes and shape in shapes[u] else 0
202 for shape in ['initial', 'medial', 'final', 'isolated']]
203 value = ', '.join ("0x%04Xu" % c for c in s)
204 print (" {%s}, /* U+%04X %s */" % (value, u, names[u] if u in names else ""))
208 print ("#define SHAPING_TABLE_FIRST 0x%04Xu" % min_u)
209 print ("#define SHAPING_TABLE_LAST 0x%04Xu" % max_u)
213 for pair in ligatures.keys ():
214 for shape in ligatures[pair]:
215 c = ligatures[pair][shape]
216 if shape == 'isolated':
217 liga = (shapes[pair[0]]['initial'], shapes[pair[1]]['final'])
218 elif shape == 'final':
219 liga = (shapes[pair[0]]['medial'], shapes[pair[1]]['final'])
221 raise Exception ("Unexpected shape", shape)
222 if liga[0] not in ligas:
224 ligas[liga[0]].append ((liga[1], c))
225 max_i = max (len (ligas[l]) for l in ligas)
227 print ("static const struct ligature_set_t {")
228 print (" uint16_t first;")
229 print (" struct ligature_pairs_t {")
230 print (" uint16_t second;")
231 print (" uint16_t ligature;")
232 print (" } ligatures[%d];" % max_i)
233 print ("} ligature_table[] =")
235 for first in sorted (ligas.keys ()):
237 print (" { 0x%04Xu, {" % (first))
238 for liga in ligas[first]:
239 print (" { 0x%04Xu, 0x%04Xu }, /* %s */" % (liga[0], liga[1], names[liga[1]]))
247 print ("/* == Start of generated table == */")
249 print (" * The following table is generated by running:")
251 print (" * ./gen-arabic-table.py ArabicShaping.txt UnicodeData.txt Blocks.txt")
253 print (" * on files with these headers:")
257 print (" * %s" % (l.strip()))
260 print ("#ifndef HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH")
261 print ("#define HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH")
264 read_blocks (files[2])
265 print_joining_table (files[0])
266 print_shaping_table (files[1])
269 print ("#endif /* HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH */")
271 print ("/* == End of generated table == */")