1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
#!/usr/bin/perl
# __________ __ ___.
# Open \______ \ ____ ____ | | _\_ |__ _______ ___
# Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
# Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
# Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
# \/ \/ \/ \/ \/
# $Id$
#
# Copyright (C) 2005 Tony Motakis
#
# All files in this archive are subject to the GNU General Public License.
# See the file COPYING in the source tree root for full license agreement.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
# set the word size limit
$word_limit = 32;
use Compress::Zlib;
# generate base 64 convertion hash
@b64_values = ( 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', 1, 2, 3, 4, 5, 6, 7, 8, 9, '+', '/' );
foreach (0..63) {
$b64_get_value{$b64_values[$_]} = $_;
}
# base 64 convertion subroutine. note that if input is plain (base 64) 0, perl
# doesn't like it, and the function misinterprents it as a (decimal) 0
# while it actually is a (decimal) 52. Input has a tab in front anyway, so
# this bug actually doesn't matter
sub base64 {
my $i = 1, $num = 0, $left = $_[0];
while($left) {
$left =~ m{([^\s])$}; # use last char of string
chop $left; # yes, chop, NOT chomp
$num += $i * $b64_get_value{$1};
$i *= 64;
}
$num;
}
# Open input files. <INDEX> is the database index, and $DICT is the actuall
# dictionary file we want to access (note the use of zlib, hence the $DICT
# variable instead of a <DICT> filehandle). <RDFOUT> is the output file, in
# plain rockbox dictionary format
open INDEX, $ARGV[0] or die "Could not open index: $!";
$DICT = gzopen($ARGV[1], "rb") or die "Could not open definitions file: $!";
open RDFOUT, ">$ARGV[2]" or die "Could not open output file: $!";
# Read the index
while(<INDEX>)
{
next if /^00-?database/;
my @current = split /\t|\n/; # split in pieces
$current[0] =~ s/^\s(.{1,$word_limit}).*$/\L\1/; # lowercase
push @def_list, $current[0];
$def_begin{$current[0]} = base64($current[1]);
$def_length{$current[0]} = base64($current[2]);
}
# sort the definition list. input from the <INDEX> is usualy sorted, but this
# is not mandatory in the dict file format, so we can't rely on this
@def_list = sort @def_list;
# read the whole DICT file into memory. overkill? propably. but the file is
# compressed, and we need quick access to random parts of it
$def_all .= $_ while($DICT->gzread($_));
foreach (@def_list) {
$def = substr $def_all, $def_begin{$_}, $def_length{$_};
$def =~ s/\n\s*/ /g; # remove newlines and whitespace after them
print RDFOUT $_ . "\t" . $def . "\n";
}
|
