#!/usr/bin/python
# Copyright 2011 The Emscripten Authors.  All rights reserved.
# Emscripten is available under two separate licenses, the MIT license and the
# University of Illinois/NCSA Open Source License.  Both these licenses can be
# found in the LICENSE file.

from __future__ import print_function
import unicodedata

UNICODE_LAST_CHAR_PART1 = 0x2FAFF
HANGUL_S_BASE = 0xAC00
HANGUL_S_COUNT = 19 * 21 * 28

print("""// Generated by gen-unicode-tables.py

typedef struct {
  Unicode character;
  int length;
  int offset;
} decomposition;
""")

decomp_table = []
max_index = 0
decomp_expansion_index = {}
decomp_expansion = []

for u in xrange(0, UNICODE_LAST_CHAR_PART1):
  if (u >= HANGUL_S_BASE and u < HANGUL_S_BASE + HANGUL_S_COUNT):
    continue
  norm = tuple(map(ord, unicodedata.normalize("NFKD", unichr(u))))
  if norm != (u,):
    try:
      i = decomp_expansion_index[norm]
      decomp_table.append((u, len(norm), i))
    except KeyError:
      decomp_table.append((u, len(norm), max_index))
      decomp_expansion_index[norm] = max_index
      decomp_expansion.append((norm, max_index))
      max_index += len(norm)
print("#define DECOMP_TABLE_LENGTH %d\n" % len(decomp_table))
print("static const decomposition decomp_table[] = {\n%s\n};\n" % ", \n".join(
    "  { 0x%x, %d, %d }" % (character, length, offset)
    for character, length, offset in decomp_table))
print("static const Unicode decomp_expansion[] = {\n%s\n};\n" % ", \n".join(
    "  %s /* offset %d */ " % (", ".join("0x%x" % u for u in norm), index) for norm, index in decomp_expansion))
