1 #!/usr/bin/python 2 3 import sys 4 import os.path 5 6 if len (sys.argv) != 3: 7 print >>sys.stderr, "usage: ./gen-arabic-table.py ArabicShaping.txt UnicodeData.txt" 8 sys.exit (1) 9 10 files = [file (x) for x in sys.argv[1:]] 11 12 headers = [[files[0].readline (), files[0].readline ()]] 13 headers.append (["UnicodeData.txt does not have a header."]) 14 while files[0].readline ().find ('##################') < 0: 15 pass 16 17 18 def print_joining_table(f): 19 20 print 21 print "static const uint8_t joining_table[] =" 22 print "{" 23 24 min_u = 0x110000 25 max_u = 0 26 num = 0 27 last = -1 28 block = '' 29 for line in f: 30 31 if line[0] == '#': 32 if line.find (" characters"): 33 block = line[2:].strip () 34 continue 35 36 fields = [x.strip () for x in line.split (';')] 37 if len (fields) == 1: 38 continue 39 40 u = int (fields[0], 16) 41 if u == 0x200C or u == 0x200D: 42 continue 43 if u < last: 44 raise Exception ("Input data character not sorted", u) 45 min_u = min (min_u, u) 46 max_u = max (max_u, u) 47 num += 1 48 49 if block: 50 print "\n /* %s */\n" % block 51 block = '' 52 53 if last != -1: 54 last += 1 55 while last < u: 56 print " JOINING_TYPE_X, /* %04X */" % last 57 last += 1 58 else: 59 last = u 60 61 if fields[3] in ["ALAPH", "DALATH RISH"]: 62 value = "JOINING_GROUP_" + fields[3].replace(' ', '_') 63 else: 64 value = "JOINING_TYPE_" + fields[2] 65 print " %s, /* %s */" % (value, '; '.join(fields)) 66 67 print 68 print "};" 69 print 70 print "#define JOINING_TABLE_FIRST 0x%04X" % min_u 71 print "#define JOINING_TABLE_LAST 0x%04X" % max_u 72 print 73 74 occupancy = num * 100 / (max_u - min_u + 1) 75 # Maintain at least 40% occupancy in the table */ 76 if occupancy < 40: 77 raise Exception ("Table too sparse, please investigate: ", occupancy) 78 79 def print_shaping_table(f): 80 81 shapes = {} 82 ligatures = {} 83 names = {} 84 for line in f: 85 86 fields = [x.strip () for x in line.split (';')] 87 if fields[5][0:1] != '<': 88 continue 89 90 items = fields[5].split (' ') 91 shape, items = items[0][1:-1], tuple (int (x, 16) for x in items[1:]) 92 93 if not shape in ['initial', 'medial', 'isolated', 'final']: 94 continue 95 96 c = int (fields[0], 16) 97 if len (items) != 1: 98 # We only care about lam-alef ligatures 99 if len (items) != 2 or items[0] != 0x0644 or items[1] not in [0x0622, 0x0623, 0x0625, 0x0627]: 100 continue 101 102 # Save ligature 103 names[c] = fields[1] 104 if items not in ligatures: 105 ligatures[items] = {} 106 ligatures[items][shape] = c 107 pass 108 else: 109 # Save shape 110 if items[0] not in names: 111 names[items[0]] = fields[1] 112 else: 113 names[items[0]] = os.path.commonprefix ([names[items[0]], fields[1]]).strip () 114 if items[0] not in shapes: 115 shapes[items[0]] = {} 116 shapes[items[0]][shape] = c 117 118 print 119 print "static const uint16_t shaping_table[][4] =" 120 print "{" 121 122 keys = shapes.keys () 123 min_u, max_u = min (keys), max (keys) 124 for u in range (min_u, max_u + 1): 125 s = [shapes[u][shape] if u in shapes and shape in shapes[u] else 0 126 for shape in ['initial', 'medial', 'final', 'isolated']] 127 value = ', '.join ("0x%04X" % c for c in s) 128 print " {%s}, /* U+%04X %s */" % (value, u, names[u] if u in names else "") 129 130 print "};" 131 print 132 print "#define SHAPING_TABLE_FIRST 0x%04X" % min_u 133 print "#define SHAPING_TABLE_LAST 0x%04X" % max_u 134 print 135 136 ligas = {} 137 for pair in ligatures.keys (): 138 for shape in ligatures[pair]: 139 c = ligatures[pair][shape] 140 if shape == 'isolated': 141 liga = (shapes[pair[0]]['initial'], shapes[pair[1]]['final']) 142 elif shape == 'final': 143 liga = (shapes[pair[0]]['medial'], shapes[pair[1]]['final']) 144 else: 145 raise Exception ("Unexpected shape", shape) 146 if liga[0] not in ligas: 147 ligas[liga[0]] = [] 148 ligas[liga[0]].append ((liga[1], c)) 149 max_i = max (len (ligas[l]) for l in ligas) 150 print 151 print "static const struct ligature_set_t {" 152 print " uint16_t first;" 153 print " struct ligature_pairs_t {" 154 print " uint16_t second;" 155 print " uint16_t ligature;" 156 print " } ligatures[%d];" % max_i 157 print "} ligature_table[] =" 158 print "{" 159 keys = ligas.keys () 160 keys.sort () 161 for first in keys: 162 163 print " { 0x%04X, {" % (first) 164 for liga in ligas[first]: 165 print " { 0x%04X, 0x%04X }, /* %s */" % (liga[0], liga[1], names[liga[1]]) 166 print " }}," 167 168 print "};" 169 print 170 171 172 173 print "/* == Start of generated table == */" 174 print "/*" 175 print " * The following table is generated by running:" 176 print " *" 177 print " * ./gen-arabic-table.py ArabicShaping.txt UnicodeData.txt" 178 print " *" 179 print " * on files with these headers:" 180 print " *" 181 for h in headers: 182 for l in h: 183 print " * %s" % (l.strip()) 184 print " */" 185 print 186 print "#ifndef HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH" 187 print "#define HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH" 188 print 189 190 print_joining_table (files[0]) 191 print_shaping_table (files[1]) 192 193 print 194 print "#endif /* HB_OT_SHAPE_COMPLEX_ARABIC_TABLE_HH */" 195 print 196 print "/* == End of generated table == */" 197 198
