1 /*
2  * "streamable kanji code filter and converter"
3  * Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
4  *
5  * LICENSE NOTICES
6  *
7  * This file is part of "streamable kanji code filter and converter",
8  * which is distributed under the terms of GNU Lesser General Public
9  * License (version 2) as published by the Free Software Foundation.
10  *
11  * This software is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with "streamable kanji code filter and converter";
18  * if not, write to the Free Software Foundation, Inc., 59 Temple Place,
19  * Suite 330, Boston, MA  02111-1307  USA
20  *
21  * The author of this file:
22  *
23  */
24 /*
25  * the source code included in this files was separated from mbfilter_ja.c
26  * by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
27  *
28  */
29 
30 #ifdef HAVE_CONFIG_H
31 #include "config.h"
32 #endif
33 
34 #include "mbfilter.h"
35 #include "mbfilter_cp932.h"
36 
37 #include "unicode_table_cp932_ext.h"
38 #include "unicode_table_jis.h"
39 
40 static int mbfl_filt_ident_cp932(int c, mbfl_identify_filter *filter);
41 
42 static const unsigned char mblen_table_sjis[] = { /* 0x80-0x9f,0xE0-0xFF */
43   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
44   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
45   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
46   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
47   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
48   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
49   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
50   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
51   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
52   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
53   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
54   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
55   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
56   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
57   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
58   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
59 };
60 
61 static const char *mbfl_encoding_cp932_aliases[] = {"MS932", "Windows-31J", "MS_Kanji", NULL};
62 
63 const mbfl_encoding mbfl_encoding_cp932 = {
64 	mbfl_no_encoding_cp932,
65 	"CP932",
66 	"Shift_JIS",
67 	(const char *(*)[])&mbfl_encoding_cp932_aliases,
68 	mblen_table_sjis,
69 	MBFL_ENCTYPE_MBCS | MBFL_ENCTYPE_GL_UNSAFE
70 };
71 
72 const struct mbfl_identify_vtbl vtbl_identify_cp932 = {
73 	mbfl_no_encoding_cp932,
74 	mbfl_filt_ident_common_ctor,
75 	mbfl_filt_ident_common_dtor,
76 	mbfl_filt_ident_cp932
77 };
78 
79 const struct mbfl_convert_vtbl vtbl_cp932_wchar = {
80 	mbfl_no_encoding_cp932,
81 	mbfl_no_encoding_wchar,
82 	mbfl_filt_conv_common_ctor,
83 	mbfl_filt_conv_common_dtor,
84 	mbfl_filt_conv_cp932_wchar,
85 	mbfl_filt_conv_common_flush
86 };
87 
88 const struct mbfl_convert_vtbl vtbl_wchar_cp932 = {
89 	mbfl_no_encoding_wchar,
90 	mbfl_no_encoding_cp932,
91 	mbfl_filt_conv_common_ctor,
92 	mbfl_filt_conv_common_dtor,
93 	mbfl_filt_conv_wchar_cp932,
94 	mbfl_filt_conv_common_flush
95 };
96 
97 #define CK(statement)	do { if ((statement) < 0) return (-1); } while (0)
98 
99 #define SJIS_ENCODE(c1,c2,s1,s2)	\
100 		do {						\
101 			s1 = c1;				\
102 			s1--;					\
103 			s1 >>= 1;				\
104 			if ((c1) < 0x5f) {		\
105 				s1 += 0x71;			\
106 			} else {				\
107 				s1 += 0xb1;			\
108 			}						\
109 			s2 = c2;				\
110 			if ((c1) & 1) {			\
111 				if ((c2) < 0x60) {	\
112 					s2--;			\
113 				}					\
114 				s2 += 0x20;			\
115 			} else {				\
116 				s2 += 0x7e;			\
117 			}						\
118 		} while (0)
119 
120 #define SJIS_DECODE(c1,c2,s1,s2)	\
121 		do {						\
122 			s1 = c1;				\
123 			if (s1 < 0xa0) {		\
124 				s1 -= 0x81;			\
125 			} else {				\
126 				s1 -= 0xc1;			\
127 			}						\
128 			s1 <<= 1;				\
129 			s1 += 0x21;				\
130 			s2 = c2;				\
131 			if (s2 < 0x9f) {		\
132 				if (s2 < 0x7f) {	\
133 					s2++;			\
134 				}					\
135 				s2 -= 0x20;			\
136 			} else {				\
137 				s1++;				\
138 				s2 -= 0x7e;			\
139 			}						\
140 		} while (0)
141 
142 
143 /*
144  * SJIS-win => wchar
145  */
146 int
mbfl_filt_conv_cp932_wchar(int c,mbfl_convert_filter * filter)147 mbfl_filt_conv_cp932_wchar(int c, mbfl_convert_filter *filter)
148 {
149 	int c1, s, s1, s2, w;
150 
151 	switch (filter->status) {
152 	case 0:
153 		if (c >= 0 && c < 0x80) {	/* latin */
154 			CK((*filter->output_function)(c, filter->data));
155 		} else if (c > 0xa0 && c < 0xe0) {	/* kana */
156 			CK((*filter->output_function)(0xfec0 + c, filter->data));
157 		} else if (c > 0x80 && c < 0xfd && c != 0xa0) {	/* kanji first char */
158 			filter->status = 1;
159 			filter->cache = c;
160 		} else {
161 			w = c & MBFL_WCSGROUP_MASK;
162 			w |= MBFL_WCSGROUP_THROUGH;
163 			CK((*filter->output_function)(w, filter->data));
164 		}
165 		break;
166 
167 	case 1:		/* kanji second char */
168 		filter->status = 0;
169 		c1 = filter->cache;
170 		if (c >= 0x40 && c <= 0xfc && c != 0x7f) {
171 			w = 0;
172 			SJIS_DECODE(c1, c, s1, s2);
173 			s = (s1 - 0x21)*94 + s2 - 0x21;
174 			if (s <= 137) {
175 				if (s == 31) {
176 					w = 0xff3c;			/* FULLWIDTH REVERSE SOLIDUS */
177 				} else if (s == 32) {
178 					w = 0xff5e;			/* FULLWIDTH TILDE */
179 				} else if (s == 33) {
180 					w = 0x2225;			/* PARALLEL TO */
181 				} else if (s == 60) {
182 					w = 0xff0d;			/* FULLWIDTH HYPHEN-MINUS */
183 				} else if (s == 80) {
184 					w = 0xffe0;			/* FULLWIDTH CENT SIGN */
185 				} else if (s == 81) {
186 					w = 0xffe1;			/* FULLWIDTH POUND SIGN */
187 				} else if (s == 137) {
188 					w = 0xffe2;			/* FULLWIDTH NOT SIGN */
189 				}
190 			}
191 			if (w == 0) {
192 				if (s >= cp932ext1_ucs_table_min && s < cp932ext1_ucs_table_max) {		/* vendor ext1 (13ku) */
193 					w = cp932ext1_ucs_table[s - cp932ext1_ucs_table_min];
194 				} else if (s >= 0 && s < jisx0208_ucs_table_size) {		/* X 0208 */
195 					w = jisx0208_ucs_table[s];
196 				} else if (s >= cp932ext2_ucs_table_min && s < cp932ext2_ucs_table_max) {		/* vendor ext2 (89ku - 92ku) */
197 					w = cp932ext2_ucs_table[s - cp932ext2_ucs_table_min];
198 				} else if (s >= cp932ext3_ucs_table_min && s < cp932ext3_ucs_table_max) {		/* vendor ext3 (115ku - 119ku) */
199 					w = cp932ext3_ucs_table[s - cp932ext3_ucs_table_min];
200 				} else if (s >= (94*94) && s < (114*94)) {		/* user (95ku - 114ku) */
201 					w = s - (94*94) + 0xe000;
202 				}
203 			}
204 			if (w <= 0) {
205 				w = (s1 << 8) | s2;
206 				w &= MBFL_WCSPLANE_MASK;
207 				w |= MBFL_WCSPLANE_WINCP932;
208 			}
209 			CK((*filter->output_function)(w, filter->data));
210 		} else if ((c >= 0 && c < 0x21) || c == 0x7f) {		/* CTLs */
211 			CK((*filter->output_function)(c, filter->data));
212 		} else {
213 			w = (c1 << 8) | c;
214 			w &= MBFL_WCSGROUP_MASK;
215 			w |= MBFL_WCSGROUP_THROUGH;
216 			CK((*filter->output_function)(w, filter->data));
217 		}
218 		break;
219 
220 	default:
221 		filter->status = 0;
222 		break;
223 	}
224 
225 	return c;
226 }
227 
228 /*
229  * wchar => SJIS-win
230  */
231 int
mbfl_filt_conv_wchar_cp932(int c,mbfl_convert_filter * filter)232 mbfl_filt_conv_wchar_cp932(int c, mbfl_convert_filter *filter)
233 {
234 	int c1, c2, s1, s2;
235 
236 	s1 = 0;
237 	s2 = 0;
238 	if (c >= ucs_a1_jis_table_min && c < ucs_a1_jis_table_max) {
239 		s1 = ucs_a1_jis_table[c - ucs_a1_jis_table_min];
240 	} else if (c >= ucs_a2_jis_table_min && c < ucs_a2_jis_table_max) {
241 		s1 = ucs_a2_jis_table[c - ucs_a2_jis_table_min];
242 	} else if (c >= ucs_i_jis_table_min && c < ucs_i_jis_table_max) {
243 		s1 = ucs_i_jis_table[c - ucs_i_jis_table_min];
244 	} else if (c >= ucs_r_jis_table_min && c < ucs_r_jis_table_max) {
245 		s1 = ucs_r_jis_table[c - ucs_r_jis_table_min];
246 	} else if (c >= 0xe000 && c < (0xe000 + 20*94)) {	/* user  (95ku - 114ku) */
247 		s1 = c - 0xe000;
248 		c1 = s1/94 + 0x7f;
249 		c2 = s1%94 + 0x21;
250 		s1 = (c1 << 8) | c2;
251 		s2 = 1;
252 	}
253 	if (s1 <= 0) {
254 		c1 = c & ~MBFL_WCSPLANE_MASK;
255 		if (c1 == MBFL_WCSPLANE_WINCP932) {
256 			s1 = c & MBFL_WCSPLANE_MASK;
257 			s2 = 1;
258 		} else if (c1 == MBFL_WCSPLANE_JIS0208) {
259 			s1 = c & MBFL_WCSPLANE_MASK;
260 		} else if (c1 == MBFL_WCSPLANE_JIS0212) {
261 			s1 = c & MBFL_WCSPLANE_MASK;
262 			s1 |= 0x8080;
263 		} else if (c == 0xa5) {		/* YEN SIGN */
264 			s1 = 0x005c;	/* YEN SIGN */
265 		} else if (c == 0x203e) {	/* OVER LINE */
266 			s1 = 0x007e;	/* FULLWIDTH MACRON */
267 		} else if (c == 0xff3c) {	/* FULLWIDTH REVERSE SOLIDUS */
268 			s1 = 0x2140;
269 		} else if (c == 0xff5e) {	/* FULLWIDTH TILDE */
270 			s1 = 0x2141;
271 		} else if (c == 0x2225) {	/* PARALLEL TO */
272 			s1 = 0x2142;
273 		} else if (c == 0xff0d) {	/* FULLWIDTH HYPHEN-MINUS */
274 			s1 = 0x215d;
275 		} else if (c == 0xffe0) {	/* FULLWIDTH CENT SIGN */
276 			s1 = 0x2171;
277 		} else if (c == 0xffe1) {	/* FULLWIDTH POUND SIGN */
278 			s1 = 0x2172;
279 		} else if (c == 0xffe2) {	/* FULLWIDTH NOT SIGN */
280 			s1 = 0x224c;
281 		}
282 	}
283 	if ((s1 <= 0) || (s1 >= 0x8080 && s2 == 0)) {	/* not found or X 0212 */
284 		s1 = -1;
285 		c1 = 0;
286 		c2 = cp932ext1_ucs_table_max - cp932ext1_ucs_table_min;
287 		while (c1 < c2) {		/* CP932 vendor ext1 (13ku) */
288 			if (c == cp932ext1_ucs_table[c1]) {
289 				s1 = ((c1/94 + 0x2d) << 8) + (c1%94 + 0x21);
290 				break;
291 			}
292 			c1++;
293 		}
294 		if (s1 <= 0) {
295 			c1 = 0;
296 			c2 = cp932ext3_ucs_table_max - cp932ext3_ucs_table_min;
297 			while (c1 < c2) {		/* CP932 vendor ext3 (115ku - 119ku) */
298 				if (c == cp932ext3_ucs_table[c1]) {
299 					s1 = ((c1/94 + 0x93) << 8) + (c1%94 + 0x21);
300 					break;
301 				}
302 				c1++;
303 			}
304 		}
305 		if (c == 0) {
306 			s1 = 0;
307 		} else if (s1 <= 0) {
308 			s1 = -1;
309 		}
310 	}
311 	if (s1 >= 0) {
312 		if (s1 < 0x100) { /* latin or kana */
313 			CK((*filter->output_function)(s1, filter->data));
314 		} else { /* kanji */
315 			c1 = (s1 >> 8) & 0xff;
316 			c2 = s1 & 0xff;
317 			SJIS_ENCODE(c1, c2, s1, s2);
318 			CK((*filter->output_function)(s1, filter->data));
319 			CK((*filter->output_function)(s2, filter->data));
320 		}
321 	} else {
322 		if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
323 			CK(mbfl_filt_conv_illegal_output(c, filter));
324 		}
325 	}
326 
327 	return c;
328 }
329 
mbfl_filt_ident_cp932(int c,mbfl_identify_filter * filter)330 static int mbfl_filt_ident_cp932(int c, mbfl_identify_filter *filter)
331 {
332 	if (filter->status) {		/* kanji second char */
333 		if (c < 0x40 || c > 0xfc || c == 0x7f) {	/* bad */
334 		    filter->flag = 1;
335 		}
336 		filter->status = 0;
337 	} else if (c >= 0 && c < 0x80) {	/* latin  ok */
338 		;
339 	} else if (c > 0xa0 && c < 0xe0) {	/* kana  ok */
340 		;
341 	} else if (c > 0x80 && c < 0xfd && c != 0xa0) {	/* kanji first char */
342 		filter->status = 1;
343 	} else {							/* bad */
344 		filter->flag = 1;
345 	}
346 
347 	return c;
348 }
349 
350 
351