ICU update to 54 step 3

scripts/big5_gen.sh

+#!/bin/sh
+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# References:
+#   https://encoding.spec.whatwg.org/#big5
+
+# This script downloads the following file.
+#   https://encoding.spec.whatwg.org/index-big5.txt
+
+function preamble {
+cat <<PREAMBLE
+# ***************************************************************************
+# *
+# *   Copyright (C) 1995-2014, International Business Machines
+# *   Corporation and others.  All Rights Reserved.
+# *
+# *   Generated per the algorithm for Big5
+# *   described at http://encoding.spec.whatwg.org/#big5
+# *
+# ***************************************************************************
+<code_set_name>               "big5-html"
+<char_name_mask>              "AXXXX"
+<mb_cur_max>                  2
+<mb_cur_min>                  1
+<uconv_class>                 "MBCS"
+<subchar>                     \x3F
+<icu:charsetFamily>           "ASCII"
+
+# 'p' is for the range that may produce non-BMP code points.
+# See http://userguide.icu-project.org/conversion/data.
+<icu:state>                   0-7f, 87-fe:1, 87-a0:2, c8:2, fa-fe:2
+<icu:state>                   40-7e, a1-fe
+<icu:state>                   40-7e.p, a1-fe.p
+
+CHARMAP
+PREAMBLE
+}
+
+function ascii {
+  for i in $(seq 0 127)
+  do
+    printf '<U%04X> \\x%02X |0\n' $i $i
+  done
+}
+
+
+# HKSCS characters are not supported in encoding ( |lead < 0xA1| )
+# Entries with pointer=528[79] have to be decoding-only even though
+# come before the other entry with the same Unicode character.
+# See https://www.w3.org/Bugs/Public/show_bug.cgi?id=27878
+function big5 {
+  awk '!/^#/ && !/^$/ \
+       { pointer = $1; \
+         ucs = substr($2, 3); \
+         sortkey = (length(ucs) < 5) ? ("0" ucs) : ucs;
+         lead = pointer / 157 + 0x81; \
+         is_decoding_only = lead < 0xA1 || seen_before[ucs] || \
+             pointer == 5287 || pointer == 5289; \
+         trail = $1 % 157; \
+         trail_offset = trail < 0x3F ? 0x40 : 0x62; \
+         tag = (is_decoding_only ? 3 : 0); \
+         printf ("<U%4s> \\x%02X\\x%02X |%d %s\n", ucs,\
+                 lead,  trail + trail_offset, tag, sortkey);\
+         seen_before[ucs] = is_decoding_only ? 0 : 1; \
+       }' \
+  index-big5.txt
+}
+
+function two_char_seq {
+cat <<EOF
+<U00CA><U0304> \x88\x62 |3 000CA
+<U00CA><U030C> \x88\x64 |3 000CA
+<U00EA><U0304> \x88\xA3 |3 000EA
+<U00EA><U030C> \x88\xA5 |3 000EA
+EOF
+}
+
+function unsorted_table {
+  two_char_seq
+  big5
+}
+
+wget -N -r -nd https://encoding.spec.whatwg.org/index-big5.txt
+preamble
+ascii
+unsorted_table | sort -k4  | uniq | cut -f 1-3 -d ' '
+echo 'END CHARMAP'