gecko-dev/intl/chardet/tools/genucs2be.pl

102 lines
1.6 KiB
Perl

#!/usr/local/bin/perl
use strict;
require "genverifier.pm";
use genverifier;
my(@ucs2be_cls);
my(@ucs2be_st);
my($ucs2be_ver);
# We look at the following UCS2 char
# U+FEFF->ItsMe if it is the first Unicode
# U+FFFF->Error
# U+FFFE->Error
# U+0d0d->Error
# U+0a0d->Error
# U+1bxx->Error
# U+29xx->Error
# U+2axx->Error
# U+2bxx->Error
# U+2cxx->Error
# U+2dxx->Error
#
# In UCS2-Big Endian it will be
#
# Ev Od
# FE FF->ItsMe for the first two bytes
# FF FF->Error
# FF FE->Error
# 0d 0d->Error
# 0a 0d->Error
# 1b ->Error
# 29 ->Error
# 2a ->Error
# 2b ->Error
# 2c ->Error
# 2d ->Error
#
# Now we classified the char
# 0a:k1
# 0d:k2
# 1b:k3
# 29-2d:k3
# fe:k4
# ff:k5
# others:k0
#
@ucs2be_cls = (
[ 0x0a, 0x0a, 1 ],
[ 0x0d, 0x0d, 2 ],
[ 0x1b, 0x1b, 3 ],
[ 0x29, 0x2d, 3 ],
[ 0xfe, 0xfe, 4 ],
[ 0xff, 0xff, 5 ],
[ 0x00, 0xff, 0 ]
);
# For Big Endian
#
# 0:k5->3
# 0:k4->4
# 0:k1,k2->7
# 0:k3->1
# 0:k0->5
# 3:k4,k5->1
# 3:*->6
# 4:k5->2
# 4:*->6
# 5:*->6
# 6:k1,k2->7
# 6:k3->1
# 6:k5->8
# 6:*->5
# 7:k2->1
# 7:*->6
# 8:k4,k5->1
# 8:*->6
package genverifier;
@ucs2be_st = (
# 0 1 2 3 4 5
5, 7, 7, 1, 4, 3, # state 0 - Start
1, 1, 1, 1, 1, 1, # state 1 - Error
2, 2, 2, 2, 2, 2, # state 2 - ItsMe
6, 6, 6, 6, 1, 1, # state 3 1st byte got FF
6, 6, 6, 6, 6, 2, # state 4 1st byte got FE
6, 6, 6, 6, 6, 6, # state 5 Odd byte
5, 7, 7, 1, 5, 8, # state 6 Even Byte
6, 6, 1, 6, 6, 6, # state 7 Got 0A or 0D
6, 6, 6, 6, 1, 1, # state 8 Got FF
);
$ucs2be_ver = genverifier::GenVerifier("UCS2BE", "UTF-16BE",
\@ucs2be_cls, 6, \@ucs2be_st);
print $ucs2be_ver;