author | Claus Gittinger <cg@exept.de> |
Tue, 02 Apr 2019 14:11:50 +0200 | |
changeset 24038 | 917ed6428d22 |
parent 22482 | 763385e4fdeb |
permissions | -rw-r--r-- |
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"{ Encoding: utf8 }" |
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class: CharacterEncoderImplementations::JIS0208_to_SJIS
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|
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" |
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4 |
COPYRIGHT (c) 2004 by eXept Software AG |
21623 | 5 |
All Rights Reserved |
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|
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This software is furnished under a license and may be used |
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8 |
only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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10 |
be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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"{ Package: 'stx:libbasic' }" |
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|
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"{ NameSpace: CharacterEncoderImplementations }" |
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|
22482 | 18 |
VariableBytesEncoder subclass:#JIS0208_to_SJIS |
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instanceVariableNames:'' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Collections-Text-Encodings' |
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! |
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|
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!JIS0208_to_SJIS class methodsFor:'documentation'! |
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|
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copyright |
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" |
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COPYRIGHT (c) 2004 by eXept Software AG |
21623 | 30 |
All Rights Reserved |
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|
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This software is furnished under a license and may be used |
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33 |
only in accordance with the terms of that license and with the |
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34 |
inclusion of the above copyright notice. This software may not |
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35 |
be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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! |
40 |
||
41 |
documentation |
|
42 |
" |
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43 |
documentation to be added. |
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||
45 |
[author:] |
|
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stefan |
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47 |
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48 |
[instance variables:] |
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[class variables:] |
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[see also:] |
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54 |
" |
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! ! |
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|
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!JIS0208_to_SJIS class methodsFor:'mapping'! |
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mapFileURL1_relativePathName |
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^ 'OBSOLETE/EASTASIA/JIS/SHIFTJIS.TXT' |
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! ! |
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|
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!JIS0208_to_SJIS class methodsFor:'queries'! |
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nameOfDecodedCode |
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"I encode sjis into jis" |
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^ #'jis0208' |
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! ! |
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70 |
|
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!JIS0208_to_SJIS methodsFor:'encoding & decoding'! |
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72 |
|
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decodeString:aString |
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"return a new JIS-Encoded-String containing the characters from aString, |
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which are interpreted as Shift-JIS encoded singleByte chars. |
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76 |
Shift-JIS is a leadyByte code, with a variable-length encoding." |
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|
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|newString char1 char2 |
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sz "{ Class: SmallInteger }" |
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dstIdx "{ Class: SmallInteger }" |
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srcIdx "{ Class: SmallInteger }" |
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b1 "{ Class: SmallInteger }" |
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b2 "{ Class: SmallInteger }" |
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84 |
val "{ Class: SmallInteger }" |
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85 |
any16bit romans| |
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86 |
|
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sz := aString size. |
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sz == 0 ifTrue:[^ aString]. |
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89 |
|
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newString := TwoByteString new:sz. |
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any16bit := false. |
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92 |
dstIdx := 1. |
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93 |
srcIdx := 1. |
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94 |
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95 |
romans := CharacterEncoderImplementations::JIS0208 romanTable. |
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96 |
|
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%{ |
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if (__isStringLike(aString) |
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&& (__Class(newString) == @global(TwoByteString))) { |
22482 | 100 |
INT _dstIdx = 0, _srcIdx = 0; |
101 |
int _sz = __intVal(sz); |
|
102 |
unsigned char *_cp = __stringVal(aString); |
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103 |
unsigned char _c1, _c2; |
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104 |
unsigned short *_jcp = (unsigned short *)__stringVal(newString); |
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105 |
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while (_srcIdx < _sz) { |
107 |
int _val; |
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108 |
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_c1 = _cp[_srcIdx]; |
110 |
_srcIdx++; |
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111 |
|
22482 | 112 |
if ((_srcIdx < _sz) |
113 |
&& (((_c1 >= 129) && (_c1 <= 159)) |
|
114 |
|| ((_c1 >= 224) && (_c1 <= 239)))) { |
|
115 |
_c2 = _cp[_srcIdx]; |
|
116 |
_srcIdx++; |
|
117 |
if ((_c2 >= 64) && (_c2 <= 252)) { |
|
118 |
int _adjust, _rowOffs, _cellOffs; |
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119 |
int _b1, _b2; |
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120 |
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_adjust = (_c2 < 159) ? 1 : 0; |
122 |
_rowOffs = (_c1 < 160) ? 112 : 176; |
|
123 |
if (_adjust) { |
|
124 |
_cellOffs = 31 + ((_c2 > 127) ? 1 : 0); |
|
125 |
} else { |
|
126 |
_cellOffs = 126; |
|
127 |
} |
|
128 |
_b1 = ((_c1 - _rowOffs) << 1) - _adjust; |
|
129 |
_b2 = (_c2 - _cellOffs); |
|
130 |
_val = (_b1<<8) + _b2; |
|
131 |
if (_val <= 0) { |
|
132 |
/* decoder error - let smalltalk handle that */ |
|
133 |
_srcIdx -= 2; |
|
134 |
goto getOutOfHere; |
|
135 |
} |
|
136 |
if (_val > 0xFF) any16bit = true; |
|
137 |
_jcp[_dstIdx] = _val; |
|
138 |
} else { |
|
139 |
/* mhmh - append untranslated */ |
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140 |
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22482 | 141 |
_jcp[_dstIdx] = _c1; |
142 |
_dstIdx++; |
|
143 |
_jcp[_dstIdx] = _c2; |
|
144 |
} |
|
145 |
} else { |
|
146 |
if ((_c1 >= 0xA1 /* 161 */) && (_c1 <= 0xDF /* 223 */)) { |
|
147 |
/* HALFWIDTH KATAKANA |
|
148 |
* map half-width katakana to 8E:xx |
|
149 |
*/ |
|
150 |
_val = _c1 - 128; |
|
151 |
_val = _val + 0x8E00; |
|
152 |
any16bit = true; |
|
153 |
_jcp[_dstIdx] = _val; |
|
154 |
} else { |
|
155 |
/* roman characters are translated as per romanTable */ |
|
156 |
_jcp[_dstIdx] = _c1; |
|
157 |
if ((romans != nil) |
|
158 |
&& (__isArrayLike(romans)) |
|
159 |
&& ((_c1 - 0x20) < __arraySize(romans))) { |
|
160 |
any16bit = true; |
|
161 |
_jcp[_dstIdx] = __intVal(__ArrayInstPtr(romans)->a_element[(_c1 - 0x20)]); |
|
162 |
} |
|
163 |
} |
|
164 |
} |
|
165 |
_dstIdx++; |
|
166 |
} |
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167 |
getOutOfHere: ; |
22482 | 168 |
dstIdx = __mkSmallInteger(_dstIdx+1); |
169 |
srcIdx = __mkSmallInteger(_srcIdx+1); |
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170 |
} |
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171 |
%}. |
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172 |
|
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173 |
[srcIdx <= sz] whileTrue:[ |
22482 | 174 |
"/ |
175 |
"/ scan for next character in 129..159 or 224..239 |
|
176 |
"/ |
|
177 |
char1 := aString at:srcIdx. |
|
178 |
srcIdx := srcIdx + 1. |
|
179 |
b1 := char1 codePoint. |
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180 |
|
22482 | 181 |
((srcIdx <= sz) |
182 |
and:[(b1 >= 16r81"129" and:[b1 <= 16r9F"159"]) "/ SJIS1 81 .. 9F |
|
183 |
or:[b1 >= 16rE0"224" and:[b1 <= 16rEF"239"]]]) ifTrue:[ "/ E0 .. EF |
|
184 |
char2 := aString at:srcIdx. |
|
185 |
srcIdx := srcIdx + 1. |
|
186 |
b2 := char2 codePoint. |
|
187 |
(b2 >= 16r40"64" and:[b2 <= 16rFC"252"]) ifTrue:[ "/ SJIS2 40 .. FC |
|
188 |
|adjust rowOffs cellOffs| |
|
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189 |
|
22482 | 190 |
adjust := (b2 < 16r9F"159") ifTrue:[1] ifFalse:[0]. |
191 |
rowOffs := b1 < 16rA0"160" ifTrue:[112] ifFalse:[176]. |
|
192 |
adjust == 1 ifTrue:[ |
|
193 |
cellOffs := 31 + (b2 > 127 ifTrue:[1] ifFalse:[0]). |
|
194 |
] ifFalse:[ |
|
195 |
cellOffs := 126. |
|
196 |
]. |
|
197 |
b1 := ((b1 - rowOffs) bitShift:1) - adjust. |
|
198 |
b2 := (b2 - cellOffs). |
|
199 |
val := (b1 bitShift:8) + b2. |
|
200 |
val <= 0 ifTrue:[ |
|
201 |
DecodingError |
|
202 |
raiseWith:aString |
|
203 |
errorString:'SJIS decoding failed (not SJIS encoded ?)'. |
|
204 |
newString at:dstIdx put:char1. |
|
205 |
dstIdx := dstIdx + 1. |
|
206 |
newString at:dstIdx put:char2. |
|
207 |
] ifFalse:[ |
|
208 |
val > 16rFF ifTrue:[any16bit := true]. |
|
209 |
newString at:dstIdx put:(Character value:val). |
|
210 |
] |
|
211 |
] ifFalse:[ |
|
212 |
"/ mhmh - append untranslated |
|
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213 |
|
22482 | 214 |
newString at:dstIdx put:char1. |
215 |
dstIdx := dstIdx + 1. |
|
216 |
newString at:dstIdx put:char2. |
|
217 |
] |
|
218 |
] ifFalse:[ |
|
219 |
(b1 >= 16rA1 "161" and:[b1 <= 16rDF "223"]) ifTrue:[ "/ HALFWIDTH KATAKANA |
|
220 |
"/ map half-width katakan to 8E:xx |
|
221 |
val := b1 - 128. |
|
222 |
val := val + (16r8E"142" bitShift:8). |
|
223 |
any16bit := true. |
|
224 |
newString at:dstIdx put:(Character value:val). |
|
225 |
] ifFalse:[ |
|
226 |
"/ roman characters translated as per romanTable |
|
227 |
newString at:dstIdx put:char1. |
|
228 |
romans isArray ifTrue:[ |
|
229 |
char1 codePoint < romans size ifTrue:[ |
|
230 |
any16bit := true. |
|
231 |
newString at:dstIdx put:(Character value:(romans at:char1 codePoint-32+1)). |
|
232 |
] |
|
233 |
] |
|
234 |
] |
|
235 |
]. |
|
236 |
dstIdx := dstIdx + 1. |
|
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237 |
]. |
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any16bit ifFalse:[ |
22482 | 239 |
newString := String fromString:newString |
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240 |
]. |
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|
241 |
|
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(dstIdx-1) ~~ sz ifTrue:[ |
22482 | 243 |
newString := newString copyTo:dstIdx - 1. |
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244 |
]. |
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|
245 |
|
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246 |
^ newString |
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247 |
|
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248 |
"simple: |
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249 |
|
21623 | 250 |
CharacterEncoderImplementations::JIS0208_to_SJIS decodeString:'hello' |
251 |
(CharacterEncoder encoderFor:#sjis) decodeString:'hello' |
|
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252 |
|
22482 | 253 |
CharacterEncoderImplementations::JIS0208_to_SJIS decodeString:('../../doc/online/japanese/TOP.html' asFilename contentsAsString) |
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254 |
|
22482 | 255 |
'../../doc/online/japanese/TOP.html' asFilename contentsAsString |
256 |
decodeFrom:#jis208 |
|
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257 |
" |
22482 | 258 |
|
259 |
"Modified (comment): / 17-01-2018 / 17:48:08 / stefan" |
|
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260 |
! |
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261 |
|
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262 |
encodeString:aJISString |
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263 |
"return a new string with aJISString's characters as SJIS encoded 8bit string. |
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264 |
The resulting string is only useful to be stored on some external file, |
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265 |
not for being displayed in an ST/X view." |
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|
266 |
|
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267 |
|sz "{ Class: SmallInteger }" |
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268 |
rval "{ Class: SmallInteger }" |
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269 |
val "{ Class: SmallInteger }" |
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270 |
romans c out isSJIS| |
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|
271 |
|
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272 |
romans := JIS0208 romanTable. |
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|
273 |
|
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274 |
sz := aJISString size. |
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275 |
sz == 0 ifTrue:[^ '']. |
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|
276 |
|
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277 |
out := WriteStream on:(String new:(sz * 2)). |
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|
278 |
|
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|
279 |
1 to:sz do:[:srcIndex | |
21623 | 280 |
val := (c := aJISString at:srcIndex) codePoint. |
281 |
(val <= 128) ifTrue:[ |
|
282 |
"/ a control or ascii character |
|
283 |
out nextPut:c. |
|
284 |
] ifFalse:[ |
|
285 |
(val == 16rFFFF "invalid-char") ifTrue:[ |
|
286 |
out nextPut:Character space. |
|
287 |
] ifFalse:[ |
|
288 |
(val > 150 and:[val < 224]) ifTrue:[ |
|
289 |
"/ ascii subset |
|
290 |
out nextPut:c. |
|
291 |
] ifFalse:[ |
|
292 |
"/ should not happen ... |
|
293 |
val <= 255 ifTrue:[ |
|
294 |
out nextPut:c. |
|
295 |
] ifFalse:[ |
|
296 |
isSJIS := true. |
|
18241
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|
297 |
|
21623 | 298 |
"/ check for HALFWIDTH KATAKANA |
299 |
"/ 8E:xx |
|
300 |
"/ NO: halfwidth katakana no longer generated |
|
301 |
"/ remains there as full-width katakana |
|
18241
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changeset
|
302 |
|
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changeset
|
303 |
"/ (val bitAnd:16rFF00) == 16r8E00 ifTrue:[ |
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changeset
|
304 |
"/ |b| |
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changeset
|
305 |
"/ |
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diff
changeset
|
306 |
"/ b := (val bitAnd:16rFF) + 128. |
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diff
changeset
|
307 |
"/ (b >= 16rA1 "161" and:[b <= 16rDF "223"]) ifTrue:[ |
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diff
changeset
|
308 |
"/ out nextPut:(Character value:b). |
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changeset
|
309 |
"/ isSJIS := false. |
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parents:
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changeset
|
310 |
"/ ]. |
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parents:
diff
changeset
|
311 |
"/ ]. |
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parents:
diff
changeset
|
312 |
|
21623 | 313 |
isSJIS ifTrue:[ |
314 |
"/ check for a roman character |
|
315 |
(val between:"romanTable min" 16r2121 and:"romanTable max" 16r2573) ifTrue:[ |
|
316 |
rval := romans indexOf:val. |
|
317 |
rval ~~ 0 ifTrue:[ |
|
318 |
rval := rval - 1 + 32. |
|
319 |
rval <= 16r7F ifTrue:[ "/ do not translate halfwidth katakana |
|
320 |
out nextPut:(Character value:rval). |
|
321 |
isSJIS := false. |
|
322 |
] |
|
323 |
]. |
|
324 |
]. |
|
325 |
]. |
|
18241
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diff
changeset
|
326 |
|
21623 | 327 |
isSJIS ifTrue:[ |
328 |
|b1 b2 rowOffset cellOffset| |
|
18241
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diff
changeset
|
329 |
|
21623 | 330 |
b1 := (val bitShift:-8). |
331 |
b2 := (val bitAnd:16rFF). |
|
332 |
rowOffset := (b1 < 95) ifTrue:[112] ifFalse:[176]. |
|
333 |
cellOffset := b1 odd ifTrue:[(b2 > 95) ifTrue:[32] ifFalse:[31]] |
|
334 |
ifFalse:[126]. |
|
18241
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diff
changeset
|
335 |
|
21623 | 336 |
out nextPut:(Character value:(((b1 + 1) bitShift:-1) + rowOffset)). |
337 |
out nextPut:(Character value:b2 + cellOffset). |
|
338 |
] |
|
339 |
] |
|
340 |
] |
|
341 |
] |
|
342 |
]. |
|
18241
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diff
changeset
|
343 |
]. |
c594840ddf15
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parents:
diff
changeset
|
344 |
^ out contents |
c594840ddf15
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changeset
|
345 |
! ! |
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parents:
diff
changeset
|
346 |
|
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
347 |
!JIS0208_to_SJIS methodsFor:'private'! |
c594840ddf15
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parents:
diff
changeset
|
348 |
|
c594840ddf15
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parents:
diff
changeset
|
349 |
newString:size |
c594840ddf15
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changeset
|
350 |
^ JISEncodedString new:size |
c594840ddf15
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parents:
diff
changeset
|
351 |
! ! |
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
352 |
|
c594840ddf15
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
353 |
!JIS0208_to_SJIS methodsFor:'queries'! |
c594840ddf15
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
354 |
|
c594840ddf15
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
355 |
nameOfEncoding |
c594840ddf15
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
356 |
^ #'sjis' |
c594840ddf15
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
357 |
! ! |
c594840ddf15
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
358 |
|
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
359 |
!JIS0208_to_SJIS class methodsFor:'documentation'! |
c594840ddf15
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
360 |
|
c594840ddf15
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
361 |
version |
21623 | 362 |
^ '$Header$' |
18241
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diff
changeset
|
363 |
! |
c594840ddf15
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
364 |
|
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Claus Gittinger <cg@exept.de>
parents:
diff
changeset
|
365 |
version_CVS |
21623 | 366 |
^ '$Header$' |
18241
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Claus Gittinger <cg@exept.de>
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changeset
|
367 |
! ! |
22482 | 368 |