diff options
Diffstat (limited to 'intl/chardet/tools/genutf8.pl')
| -rw-r--r-- | intl/chardet/tools/genutf8.pl | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/intl/chardet/tools/genutf8.pl b/intl/chardet/tools/genutf8.pl new file mode 100644 index 000000000..437dd535b --- /dev/null +++ b/intl/chardet/tools/genutf8.pl @@ -0,0 +1,189 @@ +#!/usr/local/bin/perl +# This Source Code Form is subject to the terms of the Mozilla Public +# License, v. 2.0. If a copy of the MPL was not distributed with this +# file, You can obtain one at http://mozilla.org/MPL/2.0/. + +use strict; +require "genverifier.pm"; +use genverifier; + + +my(@utf8_cls); +my(@utf8_st); +my($utf8_ver); + +# +# +# UTF8 encode the UCS4 into 1 to 4 bytes +# +# 1 byte 00 00 00 00 00 00 00 7f +# 2 bytes 00 00 00 80 00 00 07 ff +# 3 bytes 00 00 08 00 00 00 ff ff +# 4 bytes 00 01 00 00 00 10 ff ff +# +# However, since Surrogate area should not be encoded into UTF8 as +# a Surrogate pair, we can remove the surrogate area from UTF8 +# +# 1 byte 00 00 00 00 00 00 00 7f +# 2 bytes 00 00 00 80 00 00 07 ff +# 3 bytes 00 00 08 00 00 00 d7 ff +# 00 00 e0 00 00 00 ff ff +# 4 bytes 00 01 00 00 00 10 ff ff +# +# Now we break them into 6 bits group for 2-4 bytes UTF8 +# +# 1 byte 00 7f +# 2 bytes 02 00 1f 3f +# 3 bytes 00 20 00 0d 1f 3f +# 0e 00 00 0f 3f 3f +# 4 bytes 00 10 00 00 04 0f 3f 3f +# +# Break down more +# +# 1 byte 00 7f +# 2 bytes 02 00 1f 3f +# 3 bytes 00 20 00 00 3f 3f +# 01 00 00 0c 3f 3f +# 0d 00 00 0d 1f 3f +# 0e 00 00 0f 3f 3f +# 4 bytes 00 10 00 00 00 3f 3f 3f +# 01 00 00 00 03 3f 3f 3f +# 04 00 00 00 04 0f 3f 3f +# +# Now, add +# c0 to the lead byte of 2 bytes UTF8 +# e0 to the lead byte of 3 bytes UTF8 +# f0 to the lead byte of 4 bytes UTF8 +# 80 to the trail bytes +# +# 1 byte 00 7f +# 2 bytes c2 80 df bf +# 3 bytes e0 a0 80 e0 bf bf +# e1 80 80 ec bf bf +# ed 80 80 ed 9f bf +# ee 80 80 ef bf bf +# 4 bytes f0 90 80 80 f0 bf bf bf +# f1 80 80 80 f3 bf bf bf +# f4 80 80 80 f4 8f bf bf +# +# +# Now we can construct our state diagram +# +# 0:0x0e,0x0f,0x1b->Error +# 0:[0-0x7f]->0 +# 0:[c2-df]->3 +# 0:e0->4 +# 0:[e1-ec, ee-ef]->5 +# 0:ed->6 +# 0:f0->7 +# 0:[f1-f3]->8 +# 0:f4->9 +# 0:*->Error +# 3:[80-bf]->0 +# 3:*->Error +# 4:[a0-bf]->3 +# 4:*->Error +# 5:[80-bf]->3 +# 5:*->Error +# 6:[80-9f]->3 +# 6:*->Error +# 7:[90-bf]->5 +# 7:*->Error +# 8:[80-bf]->5 +# 8:*->Error +# 9:[80-8f]->5 +# 9:*->Error +# +# Now, we classified chars into class +# +# 00,0e,0f,1b:k0 +# 01-0d,10-1a,1c-7f:k1 +# 80-8f:k2 +# 90-9f:k3 +# a0-bf:k4 +# c0-c1:k0 +# c2-df:k5 +# e0:k6 +# e1-ec:k7 +# ed:k8 +# ee-ef:k7 +# f0:k9 +# f1-f3:k10 +# f4:k11 +# f5-ff:k0 +# +# Now, let's put them into array form + +@utf8_cls = ( + [ 0x00 , 0x00 , 1 ], + [ 0x0e , 0x0f , 0 ], + [ 0x1b , 0x1b , 0 ], + [ 0x01 , 0x0d , 1 ], + [ 0x10 , 0x1a , 1 ], + [ 0x1c , 0x7f , 1 ], + [ 0x80 , 0x8f , 2 ], + [ 0x90 , 0x9f , 3 ], + [ 0xa0 , 0xbf , 4 ], + [ 0xc0 , 0xc1 , 0 ], + [ 0xc2 , 0xdf , 5 ], + [ 0xe0 , 0xe0 , 6 ], + [ 0xe1 , 0xec , 7 ], + [ 0xed , 0xed , 8 ], + [ 0xee , 0xef , 7 ], + [ 0xf0 , 0xf0 , 9 ], + [ 0xf1 , 0xf3 , 10 ], + [ 0xf4 , 0xf4 , 11 ], + [ 0xf5 , 0xff , 0 ], +); +# +# Now, we write the state diagram in class +# +# 0:k0->Error +# 0:k1->0 +# 0:k5->3 +# 0:k6->4 +# 0:k7->5 +# 0:k8->6 +# 0:k9->7 +# 0:k10->8 +# 0:k11->9 +# 0:*->Error +# 3:k2,k3,k4->0 +# 3:*->Error +# 4:k4->3 +# 4:*->Error +# 5:k2,k3,k4->3 +# 5:*->Error +# 6:k2,k3->3 +# 6:*->Error +# 7:k3,k4->5 +# 7:*->Error +# 8:k2,k3,k4->5 +# 8:*->Error +# 9:k2->5 +# 9:*->Error +# +# Now, let's put them into array +# +package genverifier; +@utf8_st = ( +# 0 1 2 3 4 5 6 7 8 9 10 11 + 1, 0, 1, 1, 1, 3, 4, 5, 6, 7, 8, 9, # state 0 Start + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, # state 1 Error + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, # state 2 ItsMe + 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, # state 3 + 1, 1, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, # state 4 + 1, 1, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, # state 5 + 1, 1, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, # state 6 + 1, 1, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, # state 7 + 1, 1, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, # state 8 + 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, # state 9 +); + + + +$utf8_ver = genverifier::GenVerifier("UTF8", "UTF-8", \@utf8_cls, 12, \@utf8_st); +print $utf8_ver; + + + |