kc3-lang/harfbuzz/src/gen-arabic-joining-list.py

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• Hash : a495a542
  Author :
  Date : 2020-08-28T14:33:25
  

  Ignore T & U when determining the joining scripts
  

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• src/gen-arabic-joining-list.py

• #!/usr/bin/env python3
  
  """usage: ./gen-arabic-joining-table.py ArabicShaping.txt Scripts.txt
  
  Input files:
  * https://unicode.org/Public/UCD/latest/ucd/ArabicShaping.txt
  * https://unicode.org/Public/UCD/latest/ucd/Scripts.txt
  """
  
  import os.path, sys
  
  if len (sys.argv) != 3:
  	sys.exit (__doc__)
  
  files = [open (x, encoding='utf-8') for x in sys.argv[1:]]
  
  headers = [[f.readline (), f.readline ()] for f in files]
  while files[0].readline ().find ('##################') < 0:
  	pass
  
  def read (f):
  	mapping = {}
  	for line in f:
  
  		j = line.find ('#')
  		if j >= 0:
  			line = line[:j]
  
  		fields = [x.strip () for x in line.split (';')]
  		if len (fields) == 1:
  			continue
  
  		uu = fields[0].split ('..')
  		start = int (uu[0], 16)
  		if len (uu) == 1:
  			end = start
  		else:
  			end = int (uu[1], 16)
  
  		t = fields[1]
  
  		for u in range (start, end + 1):
  			mapping[u] = t
  
  	return mapping
  
  def read_joining_uu (f):
  	values = set ()
  	for line in f:
  
  		if line[0] == '#':
  			continue
  
  		fields = [x.strip () for x in line.split (';')]
  		if len (fields) == 1:
  			continue
  		if fields[2] in {'T', 'U'}:
  			continue
  
  		values.add (int (fields[0], 16))
  
  	return sorted (values)
  
  def print_has_arabic_joining (scripts, joining_uu):
  
  	print ("static bool")
  	print ("has_arabic_joining (hb_script_t script)")
  	print ("{")
  	print ("  /* List of scripts that have data in arabic-table. */")
  	print ("  switch ((int) script)")
  	print ("  {")
  
  	for script in sorted ({scripts[u] for u in joining_uu if scripts[u] not in {'Common', 'Inherited'}}):
  		print ("    case HB_SCRIPT_{}:".format (script.upper ()))
  
  	print ("      return true;")
  	print ()
  	print ("    default:")
  	print ("      return false;")
  	print ("  }")
  	print ("}")
  	print ()
  
  print ("/* == Start of generated function == */")
  print ("/*")
  print (" * The following function is generated by running:")
  print (" *")
  print (" *   ./gen-arabic-joining-list.py ArabicShaping.txt Scripts.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_JOINING_LIST_HH")
  print ("#define HB_OT_SHAPE_COMPLEX_ARABIC_JOINING_LIST_HH")
  print ()
  
  print_has_arabic_joining (read (files[1]), read_joining_uu (files[0]))
  
  print ()
  print ("#endif /* HB_OT_SHAPE_COMPLEX_ARABIC_JOINING_LIST_HH */")
  print ()
  print ("/* == End of generated function == */")
  

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