compact.awk

# compact.awk -- awk script to produce a compact charset map
# Copyright (C) 2003, 2004
#   National Institute of Advanced Industrial Science and Technology (AIST)
#   Registration Number H15PRO112

# This file is part of the m17n database; a sub-part of the m17n
# library.

# The m17n library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public License
# as published by the Free Software Foundation; either version 2.1 of
# the License, or (at your option) any later version.

# The m17n library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public
# License along with the m17n library; if not, write to the Free
# Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
# Boston, MA 02110-1301, USA.

BEGIN {
  tohex["0"] = 1;
  tohex["1"] = 2;
  tohex["2"] = 3;
  tohex["3"] = 4;
  tohex["4"] = 5;
  tohex["5"] = 6;
  tohex["6"] = 7;
  tohex["7"] = 8;
  tohex["8"] = 9;
  tohex["9"] = 10;
  tohex["A"] = 11;
  tohex["B"] = 12;
  tohex["C"] = 13;
  tohex["D"] = 14;
  tohex["E"] = 15;
  tohex["F"] = 16;
  tohex["a"] = 11;
  tohex["b"] = 12;
  tohex["c"] = 13;
  tohex["d"] = 14;
  tohex["e"] = 15;
  tohex["f"] = 16;
  from_code = 0;
  to_code = -1;
  to_unicode = 0;
  from_unicode = 0;
}

function decode_hex(str, idx) {
  n = 0;
  len = length(str);
  for (i = idx; i <= len; i++)
    {
      c = tohex[substr (str, i, 1)];
      if (c == 0)
	break;
      n = n * 16 + c - 1;
    }
  return n;
}

/^\#/ {
  print;
  next;
}

{
  code = decode_hex($1, 3);
  unicode = decode_hex($2, 3);
  if ((code == to_code + 1) && (unicode == to_unicode + 1))
    {
      to_code++;
      to_unicode++;
    }
  else
    {
      if (from_code == to_code)
	printf "0x%04X 0x%04X\n", from_code, from_unicode;
      else if (from_code < to_code)
	printf "0x%04X-0x%04X 0x%04X\n", from_code, to_code, from_unicode;
      from_code = to_code = code;
      from_unicode = to_unicode = unicode;
    }
}

END {
  if (from_code == to_code)
    printf "0x%04X 0x%04X\n", from_code, from_unicode;
  else
    printf "0x%04X-0x%04X 0x%04X\n", from_code, to_code, from_unicode;
}