Merge from trunk
[emacs.git] / admin / charsets / big5.awk
blob7482d11a2d15c624e851c3cf2799904ac5cfbea7
1 # Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
2 # National Institute of Advanced Industrial Science and Technology (AIST)
3 # Registration Number H13PRO009
5 # This file is part of GNU Emacs.
7 # GNU Emacs is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # GNU Emacs is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
20 BEGIN {
21 tohex["A"] = 10;
22 tohex["B"] = 11;
23 tohex["C"] = 12;
24 tohex["D"] = 13;
25 tohex["E"] = 14;
26 tohex["F"] = 15;
27 tohex["a"] = 10;
28 tohex["b"] = 11;
29 tohex["c"] = 12;
30 tohex["d"] = 13;
31 tohex["e"] = 14;
32 tohex["f"] = 15;
35 function decode_hex(str) {
36 n = 0;
37 len = length(str);
38 for (i = 1; i <= len; i++)
40 c = substr (str, i, 1);
41 if (c >= "0" && c <= "9")
42 n = n * 16 + (c - "0");
43 else
44 n = n * 16 + tohex[c];
46 return n;
49 function decode_big5(big5) {
50 b0 = int(big5 / 256);
51 b1 = big5 % 256;
52 # (0xFF - 0xA1 + 0x7F - 0x40) = 157
53 # (0xA1 - (0x7F - 0x40)) = 98
54 # (0xC9 - 0xA1) * (0xFF - 0xA1 + 0x7F - 0x40) = 6280
55 if (b1 < 127)
56 idx = (b0 - 161) * 157 + (b1 - 64);
57 else
58 idx = (b0 - 161) * 157 + (b1 - 98);
59 if (b0 >= 201)
60 idx -= 6280;
61 b0 = int(idx / 94) + 33;
62 b1 = (idx % 94) + 33;
63 return (b0 * 256 + b1)
67 big5 = decode_hex($1);
68 code = decode_big5(big5);
69 printf "0x%04X %s\n", code, $2;