190 lines
4.3 KiB
Perl
190 lines
4.3 KiB
Perl
#!/usr/local/bin/perl
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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use strict;
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require "genverifier.pm";
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use genverifier;
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my(@utf8_cls);
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my(@utf8_st);
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my($utf8_ver);
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#
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#
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# UTF8 encode the UCS4 into 1 to 4 bytes
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#
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# 1 byte 00 00 00 00 00 00 00 7f
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# 2 bytes 00 00 00 80 00 00 07 ff
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# 3 bytes 00 00 08 00 00 00 ff ff
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# 4 bytes 00 01 00 00 00 10 ff ff
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#
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# However, since Surrogate area should not be encoded into UTF8 as
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# a Surrogate pair, we can remove the surrogate area from UTF8
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#
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# 1 byte 00 00 00 00 00 00 00 7f
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# 2 bytes 00 00 00 80 00 00 07 ff
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# 3 bytes 00 00 08 00 00 00 d7 ff
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# 00 00 e0 00 00 00 ff ff
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# 4 bytes 00 01 00 00 00 10 ff ff
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#
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# Now we break them into 6 bits group for 2-4 bytes UTF8
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#
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# 1 byte 00 7f
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# 2 bytes 02 00 1f 3f
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# 3 bytes 00 20 00 0d 1f 3f
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# 0e 00 00 0f 3f 3f
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# 4 bytes 00 10 00 00 04 0f 3f 3f
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#
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# Break down more
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#
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# 1 byte 00 7f
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# 2 bytes 02 00 1f 3f
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# 3 bytes 00 20 00 00 3f 3f
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# 01 00 00 0c 3f 3f
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# 0d 00 00 0d 1f 3f
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# 0e 00 00 0f 3f 3f
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# 4 bytes 00 10 00 00 00 3f 3f 3f
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# 01 00 00 00 03 3f 3f 3f
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# 04 00 00 00 04 0f 3f 3f
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#
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# Now, add
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# c0 to the lead byte of 2 bytes UTF8
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# e0 to the lead byte of 3 bytes UTF8
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# f0 to the lead byte of 4 bytes UTF8
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# 80 to the trail bytes
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#
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# 1 byte 00 7f
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# 2 bytes c2 80 df bf
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# 3 bytes e0 a0 80 e0 bf bf
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# e1 80 80 ec bf bf
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# ed 80 80 ed 9f bf
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# ee 80 80 ef bf bf
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# 4 bytes f0 90 80 80 f0 bf bf bf
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# f1 80 80 80 f3 bf bf bf
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# f4 80 80 80 f4 8f bf bf
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#
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#
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# Now we can construct our state diagram
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#
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# 0:0x0e,0x0f,0x1b->Error
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# 0:[0-0x7f]->0
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# 0:[c2-df]->3
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# 0:e0->4
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# 0:[e1-ec, ee-ef]->5
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# 0:ed->6
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# 0:f0->7
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# 0:[f1-f3]->8
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# 0:f4->9
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# 0:*->Error
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# 3:[80-bf]->0
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# 3:*->Error
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# 4:[a0-bf]->3
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# 4:*->Error
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# 5:[80-bf]->3
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# 5:*->Error
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# 6:[80-9f]->3
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# 6:*->Error
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# 7:[90-bf]->5
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# 7:*->Error
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# 8:[80-bf]->5
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# 8:*->Error
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# 9:[80-8f]->5
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# 9:*->Error
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#
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# Now, we classified chars into class
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#
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# 00,0e,0f,1b:k0
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# 01-0d,10-1a,1c-7f:k1
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# 80-8f:k2
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# 90-9f:k3
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# a0-bf:k4
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# c0-c1:k0
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# c2-df:k5
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# e0:k6
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# e1-ec:k7
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# ed:k8
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# ee-ef:k7
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# f0:k9
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# f1-f3:k10
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# f4:k11
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# f5-ff:k0
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#
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# Now, let's put them into array form
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@utf8_cls = (
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[ 0x00 , 0x00 , 1 ],
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[ 0x0e , 0x0f , 0 ],
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[ 0x1b , 0x1b , 0 ],
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[ 0x01 , 0x0d , 1 ],
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[ 0x10 , 0x1a , 1 ],
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[ 0x1c , 0x7f , 1 ],
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[ 0x80 , 0x8f , 2 ],
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[ 0x90 , 0x9f , 3 ],
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[ 0xa0 , 0xbf , 4 ],
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[ 0xc0 , 0xc1 , 0 ],
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[ 0xc2 , 0xdf , 5 ],
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[ 0xe0 , 0xe0 , 6 ],
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[ 0xe1 , 0xec , 7 ],
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[ 0xed , 0xed , 8 ],
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[ 0xee , 0xef , 7 ],
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[ 0xf0 , 0xf0 , 9 ],
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[ 0xf1 , 0xf3 , 10 ],
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[ 0xf4 , 0xf4 , 11 ],
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[ 0xf5 , 0xff , 0 ],
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);
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#
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# Now, we write the state diagram in class
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#
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# 0:k0->Error
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# 0:k1->0
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# 0:k5->3
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# 0:k6->4
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# 0:k7->5
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# 0:k8->6
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# 0:k9->7
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# 0:k10->8
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# 0:k11->9
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# 0:*->Error
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# 3:k2,k3,k4->0
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# 3:*->Error
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# 4:k4->3
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# 4:*->Error
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# 5:k2,k3,k4->3
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# 5:*->Error
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# 6:k2,k3->3
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# 6:*->Error
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# 7:k3,k4->5
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# 7:*->Error
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# 8:k2,k3,k4->5
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# 8:*->Error
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# 9:k2->5
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# 9:*->Error
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#
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# Now, let's put them into array
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#
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package genverifier;
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@utf8_st = (
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# 0 1 2 3 4 5 6 7 8 9 10 11
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1, 0, 1, 1, 1, 3, 4, 5, 6, 7, 8, 9, # state 0 Start
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, # state 1 Error
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, # state 2 ItsMe
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1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, # state 3
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1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, # state 4
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1, 1, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, # state 5
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1, 1, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, # state 6
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1, 1, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, # state 7
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1, 1, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, # state 8
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1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, # state 9
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);
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$utf8_ver = genverifier::GenVerifier("UTF8", "UTF-8", \@utf8_cls, 12, \@utf8_st);
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print $utf8_ver;
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