gfx/harfbuzz/src/gen-os2-unicode-ranges.py

   1 #!/usr/bin/env python3
   2
   3 """Generates the code for a sorted unicode range array as used in hb-ot-os2-unicode-ranges.hh
   4 Input is a tab separated list of unicode ranges from the otspec
   5 (https://docs.microsoft.com/en-us/typography/opentype/spec/os2#ur).
   6 """
   7
   8 import re
   9 import sys
  10
  11
  12 print ("""static OS2Range _hb_os2_unicode_ranges[] =
  13 {""")
  14
  15 args = sys.argv[1:]
  16 input_file = args[0]
  17
  18 with open (input_file, mode="r", encoding="utf-8") as f:
  19
  20   all_ranges = []
  21   current_bit = 0
  22   while True:
  23     line = f.readline().strip()
  24     if not line:
  25       break
  26     fields = re.split(r'\t+', line)
  27     if len(fields) == 3:
  28       current_bit = fields[0]
  29       fields = fields[1:]
  30     elif len(fields) > 3:
  31       raise Exception("bad input :(.")
  32
  33     name = fields[0]
  34     ranges = re.split("-", fields[1])
  35     if len(ranges) != 2:
  36       raise Exception("bad input :(.")
  37
  38     v = tuple((int(ranges[0], 16), int(ranges[1], 16), int(current_bit), name))
  39     all_ranges.append(v)
  40
  41 all_ranges = sorted(all_ranges, key=lambda t: t[0])
  42
  43 for ranges in all_ranges:
  44   start = ("0x%X" % ranges[0]).rjust(8)
  45   end = ("0x%X" % ranges[1]).rjust(8)
  46   bit = ("%s" % ranges[2]).rjust(3)
  47
  48   print ("  {%s, %s, %s}, // %s" % (start, end, bit, ranges[3]))
  49
  50 print ("""};""")