268 lines
6.7 KiB
Python
268 lines
6.7 KiB
Python
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#!/usr/bin/env python
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from __future__ import print_function, division, absolute_import
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import io, os.path, sys
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if len (sys.argv) != 4:
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print ("usage: ./gen-arabic-table.py ArabicShaping.txt UnicodeData.txt Blocks.txt", file=sys.stderr)
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sys.exit (1)
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files = [io.open (x, encoding='utf-8') for x in sys.argv[1:]]
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headers = [[files[0].readline (), files[0].readline ()], [files[2].readline (), files[2].readline ()]]
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headers.append (["UnicodeData.txt does not have a header."])
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while files[0].readline ().find ('##################') < 0:
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pass
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blocks = {}
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def read_blocks(f):
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global blocks
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for line in f:
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j = line.find ('#')
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if j >= 0:
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line = line[:j]
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fields = [x.strip () for x in line.split (';')]
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if len (fields) == 1:
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continue
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uu = fields[0].split ('..')
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start = int (uu[0], 16)
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if len (uu) == 1:
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end = start
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else:
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end = int (uu[1], 16)
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t = fields[1]
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for u in range (start, end + 1):
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blocks[u] = t
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def print_joining_table(f):
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values = {}
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for line in f:
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if line[0] == '#':
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continue
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fields = [x.strip () for x in line.split (';')]
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if len (fields) == 1:
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continue
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u = int (fields[0], 16)
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if fields[3] in ["ALAPH", "DALATH RISH"]:
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value = "JOINING_GROUP_" + fields[3].replace(' ', '_')
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else:
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value = "JOINING_TYPE_" + fields[2]
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values[u] = value
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short_value = {}
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for value in set([v for v in values.values()] + ['JOINING_TYPE_X']):
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short = ''.join(x[0] for x in value.split('_')[2:])
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assert short not in short_value.values()
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short_value[value] = short
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print ()
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for value,short in short_value.items():
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print ("#define %s %s" % (short, value))
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uu = sorted(values.keys())
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num = len(values)
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all_blocks = set([blocks[u] for u in uu])
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last = -100000
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ranges = []
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for u in uu:
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if u - last <= 1+16*5:
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ranges[-1][-1] = u
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else:
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ranges.append([u,u])
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last = u
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print ()
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print ("static const uint8_t joining_table[] =")
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print ("{")
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last_block = None
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offset = 0
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for start,end in ranges:
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print ()
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print ("#define joining_offset_0x%04xu %d" % (start, offset))
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for u in range(start, end+1):
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block = blocks.get(u, last_block)
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value = values.get(u, "JOINING_TYPE_X")
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if block != last_block or u == start:
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if u != start:
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print ()
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if block in all_blocks:
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print ("\n /* %s */" % block)
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else:
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print ("\n /* FILLER */")
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last_block = block
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if u % 32 != 0:
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print ()
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print (" /* %04X */" % (u//32*32), " " * (u % 32), end="")
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if u % 32 == 0:
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print ()
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print (" /* %04X */ " % u, end="")
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print ("%s," % short_value[value], end="")
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print ()
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offset += end - start + 1
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print ()
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occupancy = num * 100. / offset
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print ("}; /* Table items: %d; occupancy: %d%% */" % (offset, occupancy))
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print ()
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page_bits = 12;
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print ()
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print ("static unsigned int")
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print ("joining_type (hb_codepoint_t u)")
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print ("{")
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print (" switch (u >> %d)" % page_bits)
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print (" {")
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pages = set([u>>page_bits for u in [s for s,e in ranges]+[e for s,e in ranges]])
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for p in sorted(pages):
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print (" case 0x%0Xu:" % p)
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for (start,end) in ranges:
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if p not in [start>>page_bits, end>>page_bits]: continue
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offset = "joining_offset_0x%04xu" % start
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print (" if (hb_in_range<hb_codepoint_t> (u, 0x%04Xu, 0x%04Xu)) return joining_table[u - 0x%04Xu + %s];" % (start, end, start, offset))
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print (" break;")
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print ("")
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print (" default:")
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print (" break;")
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print (" }")
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print (" return X;")
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print ("}")
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print ()
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for value,short in short_value.items():
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print ("#undef %s" % (short))
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print ()
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def print_shaping_table(f):
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shapes = {}
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ligatures = {}
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names = {}
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for line in f:
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fields = [x.strip () for x in line.split (';')]
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if fields[5][0:1] != '<':
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continue
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items = fields[5].split (' ')
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shape, items = items[0][1:-1], tuple (int (x, 16) for x in items[1:])
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if not shape in ['initial', 'medial', 'isolated', 'final']:
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continue
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c = int (fields[0], 16)
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if len (items) != 1:
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# We only care about lam-alef ligatures
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if len (items) != 2 or items[0] != 0x0644 or items[1] not in [0x0622, 0x0623, 0x0625, 0x0627]:
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continue
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# Save ligature
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names[c] = fields[1]
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if items not in ligatures:
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ligatures[items] = {}
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ligatures[items][shape] = c
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pass
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else:
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# Save shape
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if items[0] not in names:
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names[items[0]] = fields[1]
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else:
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names[items[0]] = os.path.commonprefix ([names[items[0]], fields[1]]).strip ()
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if items[0] not in shapes:
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shapes[items[0]] = {}
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shapes[items[0]][shape] = c
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print ()
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print ("static const uint16_t shaping_table[][4] =")
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print ("{")
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keys = shapes.keys ()
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min_u, max_u = min (keys), max (keys)
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for u in range (min_u, max_u + 1):
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s = [shapes[u][shape] if u in shapes and shape in shapes[u] else 0
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for shape in ['initial', 'medial', 'final', 'isolated']]
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value = ', '.join ("0x%04Xu" % c for c in s)
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print (" {%s}, /* U+%04X %s */" % (value, u, names[u] if u in names else ""))
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print ("};")
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print ()
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print ("#define SHAPING_TABLE_FIRST 0x%04Xu" % min_u)
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print ("#define SHAPING_TABLE_LAST 0x%04Xu" % max_u)
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print ()
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ligas = {}
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for pair in ligatures.keys ():
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for shape in ligatures[pair]:
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c = ligatures[pair][shape]
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if shape == 'isolated':
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liga = (shapes[pair[0]]['initial'], shapes[pair[1]]['final'])
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elif shape == 'final':
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liga = (shapes[pair[0]]['medial'], shapes[pair[1]]['final'])
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else:
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raise Exception ("Unexpected shape", shape)
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if liga[0] not in ligas:
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ligas[liga[0]] = []
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ligas[liga[0]].append ((liga[1], c))
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max_i = max (len (ligas[l]) for l in ligas)
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print ()
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print ("static const struct ligature_set_t {")
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print (" uint16_t first;")
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print (" struct ligature_pairs_t {")
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print (" uint16_t second;")
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print (" uint16_t ligature;")
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print (" } ligatures[%d];" % max_i)
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print ("} ligature_table[] =")
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print ("{")
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for first in sorted (ligas.keys ()):
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print (" { 0x%04Xu, {" % (first))
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for liga in ligas[first]:
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print (" { 0x%04Xu, 0x%04Xu }, /* %s */" % (liga[0], liga[1], names[liga[1]]))
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print (" }},")
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print ("};")
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print ()
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print ("/* == Start of generated table == */")
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print ("/*")
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print (" * The following table is generated by running:")
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print (" *")
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print (" * ./gen-arabic-table.py ArabicShaping.txt UnicodeData.txt Blocks.txt")
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print (" *")
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print (" * on files with these headers:")
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print (" *")
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for h in headers:
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for l in h:
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print (" * %s" % (l.strip()))
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print (" */")
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print ()
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print ("#ifndef HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH")
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print ("#define HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH")
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print ()
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read_blocks (files[2])
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print_joining_table (files[0])
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print_shaping_table (files[1])
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print ()
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print ("#endif /* HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH */")
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print ()
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print ("/* == End of generated table == */")
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