kc3-lang/md4c/scripts/build_whitespace_map.py

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• Author : Martin Mitas
  Date : 2019-05-19 10:46:26
  Hash : 4f6a9e54
  Message : Update Unicode support to 12.1. * scipts/build_*_map.py: Implement helper pythonic scripts used to generate some Unicode search maps and data for helper Unicode functions used in MD4C. This should simplify updating to future Unicode versions. * md_get_unicode_fold_info: Use data generated by the scripts. * md_is_unicode_whitespace__: Ditto. * md_is_unicode_punct__: Ditto.

• scripts/build_whitespace_map.py

• #!/usr/bin/env python3
  
  import os
  import sys
  import textwrap
  
  
  self_path = os.path.dirname(os.path.realpath(__file__));
  f = open(self_path + "/unicode/DerivedGeneralCategory.txt", "r")
  
  codepoint_list = []
  category_list = [ "Zs" ]
  
  # Filter codepoints falling in the right category:
  for line in f:
      comment_off = line.find("#")
      if comment_off >= 0:
          line = line[:comment_off]
      line = line.strip()
      if not line:
          continue
  
      char_range, category = line.split(";")
      char_range = char_range.strip()
      category = category.strip()
  
      if not category in category_list:
          continue
  
      delim_off = char_range.find("..")
      if delim_off >= 0:
          codepoint0 = int(char_range[:delim_off], 16)
          codepoint1 = int(char_range[delim_off+2:], 16)
          for codepoint in range(codepoint0, codepoint1 + 1):
              codepoint_list.append(codepoint)
      else:
          codepoint = int(char_range, 16)
          codepoint_list.append(codepoint)
  f.close()
  
  
  codepoint_list.sort()
  
  
  index0 = 0
  count = len(codepoint_list)
  
  records = list()
  while index0 < count:
      index1 = index0 + 1
      while index1 < count and codepoint_list[index1] == codepoint_list[index1-1] + 1:
          index1 += 1
  
      if index1 - index0 > 1:
          # Range of codepoints
          records.append("R(0x{:04x},0x{:04x})".format(codepoint_list[index0], codepoint_list[index1-1]))
      else:
          # Single codepoint
          records.append("S(0x{:04x})".format(codepoint_list[index0]))
  
      index0 = index1
  
  sys.stdout.write("static const unsigned WHITESPACE_MAP[] = {\n")
  sys.stdout.write("\n".join(textwrap.wrap(", ".join(records), 110,
                      initial_indent = "    ", subsequent_indent="    ")))
  sys.stdout.write("\n};\n\n")