gecko/intl/chardet/tools/genucs2le.pl

104 lines
1.6 KiB
Perl

#!/usr/local/bin/perl
use strict;
require "genverifier.pm";
use genverifier;
my(@ucs2le_cls);
my(@ucs2le_st);
my($ucs2le_ver);
# We look at the following UCS2
# 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-Little Endian it will be
#
# Ev Od
# FF FE->ItsMe for the first two bytes
# FF FF->Error
# FE FF->Error
# 0d 0d->Error
# 0d 0a->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
@ucs2le_cls = (
[ 0x0a, 0x0a, 1 ],
[ 0x0d, 0x0d, 2 ],
[ 0x1b, 0x1b, 3 ],
[ 0x29, 0x2d, 3 ],
[ 0xfe, 0xfe, 4 ],
[ 0xff, 0xff, 5 ],
[ 0x00, 0xff, 0 ]
);
# For Little Endian
# 0:k5->3
# 0:k4->4
# 0:k2->7
# 0:*->6
# 3:k4->2
# 3:k5->1
# 3:k3->1
# 3:*->5
# 4:k3,k5->1
# 4:*->5
# 5:k4,k5->8
# 5:k2->7
# 5:*->6
# 6:k3->1
# 6:*->5
# 7:k1,k2->1
# 7:k3->1
# 7:*->5
# 8:k5->1
# 8:k3->1
# 8:*->5
package genverifier;
@ucs2le_st = (
# 0 1 2 3 4 5
6, 6, 7, 6, 4, 3, # state 0 - Start
1, 1, 1, 1, 1, 1, # state 1 - Error
2, 2, 2, 2, 2, 2, # state 2 - ItsMe
5, 5, 5, 1, 2, 1, # state 3 1st byte Got FF
5, 5, 5, 1, 5, 1, # state 4 1st byte Got FE
6, 6, 7, 6, 8, 8, # state 5 Even Byte
5, 5, 5, 1, 5, 5, # state 6 Odd Byte
5, 1, 1, 1, 5, 5, # state 7 Got 0d
5, 5, 5, 1, 5, 1, # state 8 Got FF
);
$ucs2le_ver = genverifier::GenVerifier("UCS2LE", "UTF-16LE", \@ucs2le_cls,
6, \@ucs2le_st);
print $ucs2le_ver;