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#!/usr/bin/python
import sys
import os.path
if len (sys.argv) != 3:
print >>sys.stderr, "usage: ./gen-arabic-table.py ArabicShaping.txt UnicodeData.txt"
sys.exit (1)
files = [file (x) for x in sys.argv[1:]]
headers = [[files[0].readline (), files[0].readline ()]]
headers.append (["UnicodeData.txt does not have a header."])
while files[0].readline ().find ('##################') < 0:
pass
def print_joining_table(f):
print
print "static const uint8_t joining_table[] ="
print "{"
min_u = 0x110000
max_u = 0
num = 0
last = -1
block = ''
for line in f:
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 "};"
print
print "#define JOINING_TABLE_FIRST 0x%04X" % min_u
print "#define JOINING_TABLE_LAST 0x%04X" % max_u
print
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)
def print_shaping_table(f):
shapes = {}
ligatures = {}
names = {}
for line in f:
fields = [x.strip () for x in line.split (';')]
if fields[5][0:1] != '<':
continue
items = fields[5].split (' ')
shape, items = items[0][1:-1], tuple (int (x, 16) for x in items[1:])
if not shape in ['initial', 'medial', 'isolated', 'final']:
continue
c = int (fields[0], 16)
if len (items) != 1:
# We only care about lam-alef ligatures
if len (items) != 2 or items[0] != 0x0644 or items[1] not in [0x0622, 0x0623, 0x0625, 0x0627]:
continue
# Save ligature
names[c] = fields[1]
if items not in ligatures:
ligatures[items] = {}
ligatures[items][shape] = c
pass
else:
# Save shape
if items[0] not in names:
names[items[0]] = fields[1]
else:
names[items[0]] = os.path.commonprefix ([names[items[0]], fields[1]]).strip ()
if items[0] not in shapes:
shapes[items[0]] = {}
shapes[items[0]][shape] = c
print
print "static const uint16_t shaping_table[][4] ="
print "{"
keys = shapes.keys ()
min_u, max_u = min (keys), max (keys)
for u in range (min_u, max_u + 1):
s = [shapes[u][shape] if u in shapes and shape in shapes[u] else 0
for shape in ['initial', 'medial', 'final', 'isolated']]
value = ', '.join ("0x%04X" % c for c in s)
print " {%s}, /* U+%04X %s */" % (value, u, names[u] if u in names else "")
print "};"
print
print "#define SHAPING_TABLE_FIRST 0x%04X" % min_u
print "#define SHAPING_TABLE_LAST 0x%04X" % max_u
print
ligas = {}
for pair in ligatures.keys ():
for shape in ligatures[pair]:
c = ligatures[pair][shape]
if shape == 'isolated':
liga = (shapes[pair[0]]['initial'], shapes[pair[1]]['final'])
elif shape == 'final':
liga = (shapes[pair[0]]['medial'], shapes[pair[1]]['final'])
else:
raise Exception ("Unexpected shape", shape)
if liga[0] not in ligas:
ligas[liga[0]] = []
ligas[liga[0]].append ((liga[1], c))
max_i = max (len (ligas[l]) for l in ligas)
print
print "static const struct ligature_set_t {"
print " uint16_t first;"
print " struct ligature_pairs_t {"
print " uint16_t second;"
print " uint16_t ligature;"
print " } ligatures[%d];" % max_i
print "} ligature_table[] ="
print "{"
keys = ligas.keys ()
keys.sort ()
for first in keys:
print " { 0x%04X, {" % (first)
for liga in ligas[first]:
print " { 0x%04X, 0x%04X }, /* %s */" % (liga[0], liga[1], names[liga[1]])
print " }},"
print "};"
print
print "/* == Start of generated table == */"
print "/*"
print " * The following table is generated by running:"
print " *"
print " * ./gen-arabic-table.py ArabicShaping.txt UnicodeData.txt"
print " *"
print " * on files with these headers:"
print " *"
for h in headers:
for l in h:
print " * %s" % (l.strip())
print " */"
print
print "#ifndef HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH"
print "#define HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH"
print
print_joining_table (files[0])
print_shaping_table (files[1])
print
print "#endif /* HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH */"
print
print "/* == End of generated table == */"
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