text: #!/usr/bin/env python3
  
  """usage: ./gen-ucd-table ucd.nounihan.grouped.xml [/path/to/hb-common.h]
  
  Input file:
  * https://unicode.org/Public/UCD/latest/ucdxml/ucd.nounihan.grouped.zip
  """
  
  import os.path, sys, re
  import logging
  logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.INFO)
  
  if len (sys.argv) not in (2, 3):
  	sys.exit (__doc__)
  
  # https://github.com/harfbuzz/packtab
  import packTab
  import packTab.ucdxml
  
  logging.info('Loading UCDXML...')
  ucdxml = packTab.ucdxml.load_ucdxml(sys.argv[1])
  ucd = packTab.ucdxml.ucdxml_get_repertoire(ucdxml)
  
  hb_common_h = 'hb-common.h' if len (sys.argv) < 3 else sys.argv[2]
  
  logging.info('Preparing data tables...')
  
  gc = [u['gc'] for u in ucd]
  ccc = [int(u['ccc']) for u in ucd]
  bmg = [int(v, 16) - int(u) if v else 0 for u,v in enumerate(u['bmg'] for u in ucd)]
  #gc_ccc_non0 = set((cat,klass) for cat,klass in zip(gc,ccc) if klass)
  #gc_bmg_non0 = set((cat,mirr) for cat,mirr in zip(gc, bmg) if mirr)
  
  sc = [u['sc'] for u in ucd]
  
  dm = {i:tuple(int(v, 16) for v in u['dm'].split()) for i,u in enumerate(ucd)
        if u['dm'] != '#' and u['dt'] == 'can' and not (0xAC00 <= i < 0xAC00+11172)}
  ce = {i for i,u in enumerate(ucd) if u['Comp_Ex'] == 'Y'}
  
  assert not any(v for v in dm.values() if len(v) not in (1,2))
  dm1 = sorted(set(v for v in dm.values() if len(v) == 1))
  assert all((v[0] >> 16) in (0,2) for v in dm1)
  dm1_p0_array = ['0x%04Xu' % (v[0] & 0xFFFF) for v in dm1 if (v[0] >> 16) == 0]
  dm1_p2_array = ['0x%04Xu' % (v[0] & 0xFFFF) for v in dm1 if (v[0] >> 16) == 2]
  dm1_order = {v:i+1 for i,v in enumerate(dm1)}
  
  dm2 = sorted((v+(i if i not in ce and not ccc[i] else 0,), v)
               for i,v in dm.items() if len(v) == 2)
  
  filt = lambda v: ((v[0] & 0xFFFFF800) == 0x0000 and
                    (v[1] & 0xFFFFFF80) == 0x0300 and
                    (v[2] & 0xFFF0C000) == 0x0000)
  dm2_u32_array = [v for v in dm2 if filt(v[0])]
  dm2_u64_array = [v for v in dm2 if not filt(v[0])]
  assert dm2_u32_array + dm2_u64_array == dm2
  dm2_u32_array = ["HB_CODEPOINT_ENCODE3_11_7_14 (0x%04Xu, 0x%04Xu, 0x%04Xu)" % v[0] for v in dm2_u32_array]
  dm2_u64_array = ["HB_CODEPOINT_ENCODE3 (0x%04Xu, 0x%04Xu, 0x%04Xu)" % v[0] for v in dm2_u64_array]
  
  l = 1 + len(dm1_p0_array) + len(dm1_p2_array)
  dm2_order = {v[1]:i+l for i,v in enumerate(dm2)}
  
  dm_order = {None: 0}
  dm_order.update(dm1_order)
  dm_order.update(dm2_order)
  
  gc_order = dict()
  for i,v in enumerate(('Cc', 'Cf', 'Cn', 'Co', 'Cs', 'Ll', 'Lm', 'Lo', 'Lt', 'Lu',
                        'Mc', 'Me', 'Mn', 'Nd', 'Nl', 'No', 'Pc', 'Pd', 'Pe', 'Pf',
                        'Pi', 'Po', 'Ps', 'Sc', 'Sk', 'Sm', 'So', 'Zl', 'Zp', 'Zs',)):
      gc_order[i] = v
      gc_order[v] = i
  
  sc_order = dict()
  sc_array = []
  sc_re = re.compile(r"\b(HB_SCRIPT_[_A-Z]*).*HB_TAG [(]'(.)','(.)','(.)','(.)'[)]")
  for line in open(hb_common_h):
      m = sc_re.search (line)
      if not m: continue
      name = m.group(1)
      tag = ''.join(m.group(i) for i in range(2, 6))
      i = len(sc_array)
      sc_order[tag] = i
      sc_order[i] = tag
      sc_array.append(name)
  
  DEFAULT = 1
  COMPACT = 3
  SLOPPY  = 5
  
  
  logging.info('Generating output...')
  print("/* == Start of generated table == */")
  print("/*")
  print(" * The following table is generated by running:")
  print(" *")
  print(" *   ./gen-ucd-table.py ucd.nounihan.grouped.xml")
  print(" *")
  print(" * on file with this description:", ucdxml.description)
  print(" */")
  print()
  print("#ifndef HB_UCD_TABLE_HH")
  print("#define HB_UCD_TABLE_HH")
  print()
  print('#include "hb.hh"')
  print()
  
  code = packTab.Code('_hb_ucd')
  sc_array, _ = code.addArray('hb_script_t', 'sc_map', sc_array)
  dm1_p0_array, _ = code.addArray('uint16_t', 'dm1_p0_map', dm1_p0_array)
  dm1_p2_array, _ = code.addArray('uint16_t', 'dm1_p2_map', dm1_p2_array)
  dm2_u32_array, _ = code.addArray('uint32_t', 'dm2_u32_map', dm2_u32_array)
  dm2_u64_array, _ = code.addArray('uint64_t', 'dm2_u64_map', dm2_u64_array)
  code.print_c(linkage='static inline')
  
  datasets = [
      ('gc', gc, 'Cn', gc_order),
      ('ccc', ccc, 0, None),
      ('bmg', bmg, 0, None),
      ('sc', sc, 'Zzzz', sc_order),
      ('dm', dm, None, dm_order),
  ]
  
  for compression in (DEFAULT, COMPACT, SLOPPY):
      logging.info('  Compression=%d:' % compression)
      print()
      if compression == DEFAULT:
          print('#ifndef HB_OPTIMIZE_SIZE')
      elif compression == COMPACT:
          print('#elif !defined(HB_NO_UCD_UNASSIGNED)')
      else:
          print('#else')
      print()
  
      if compression == SLOPPY:
          for i in range(len(gc)):
              if (i % 128) and gc[i] == 'Cn':
                  gc[i] = gc[i - 1]
          for i in range(len(gc) - 2, -1, -1):
              if ((i + 1) % 128) and gc[i] == 'Cn':
                  gc[i] = gc[i + 1]
          for i in range(len(sc)):
              if (i % 128) and sc[i] == 'Zzzz':
                  sc[i] = sc[i - 1]
          for i in range(len(sc) - 2, -1, -1):
              if ((i + 1) % 128) and sc[i] == 'Zzzz':
                  sc[i] = sc[i + 1]
  
  
      code = packTab.Code('_hb_ucd')
  
      for name,data,default,mapping in datasets:
          sol = packTab.pack_table(data, default, mapping=mapping, compression=compression)
          logging.info('      Dataset=%-8s FullCost=%d' % (name, sol.fullCost))
          sol.genCode(code, name)
  
      code.print_c(linkage='static inline')
  
      print()
  
  print('#endif')
  print()
  
  print()
  print("#endif /* HB_UCD_TABLE_HH */")
  print()
  print("/* == End of generated table == */")
  logging.info('Done.')
  