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2005-03-15 Jakub Jelinek <jakub@redhat.com>
[glibc/history.git] / iconvdata / shift_jisx0213.c
blob8e3fcb768b8c066c05aa8dde160aa8a48f195aea
1 /* Conversion from and to Shift_JISX0213.
2 Copyright (C) 2002, 2004 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Bruno Haible <bruno@clisp.org>, 2002.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library 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 GNU
14 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 the GNU C Library; if not, write to the Free
18 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 02111-1307 USA. */
20
21 #include <dlfcn.h>
22 #include <stdint.h>
23 #include <gconv.h>
24
25 /* The structure of Shift_JISX0213 is as follows:
26
27 0x00..0x7F: ISO646-JP, an ASCII variant
28
29 0x{A1..DF}: JISX0201 Katakana.
30
31 0x{81..9F,E0..EF}{40..7E,80..FC}: JISX0213 plane 1.
32
33 0x{F0..FC}{40..7E,80..FC}: JISX0213 plane 2, with irregular row mapping.
34
35 Note that some JISX0213 characters are not contained in Unicode 3.2
36 and are therefore best represented as sequences of Unicode characters.
37 */
38
39 #include "jisx0213.h"
40
41 /* Definitions used in the body of the `gconv' function. */
42 #define CHARSET_NAME "SHIFT_JISX0213//"
43 #define FROM_LOOP from_shift_jisx0213
44 #define TO_LOOP to_shift_jisx0213
45 #define DEFINE_INIT 1
46 #define DEFINE_FINI 1
47 #define FROM_LOOP_MIN_NEEDED_FROM 1
48 #define FROM_LOOP_MAX_NEEDED_FROM 2
49 #define FROM_LOOP_MIN_NEEDED_TO 4
50 #define FROM_LOOP_MAX_NEEDED_TO 8
51 #define TO_LOOP_MIN_NEEDED_FROM 4
52 #define TO_LOOP_MAX_NEEDED_FROM 4
53 #define TO_LOOP_MIN_NEEDED_TO 1
54 #define TO_LOOP_MAX_NEEDED_TO 2
55 #define PREPARE_LOOP \
56 int saved_state; \
57 int *statep = &data->__statep->__count;
58 #define EXTRA_LOOP_ARGS , statep
59
60
61 /* Since we might have to reset input pointer we must be able to save
62 and restore the state. */
63 #define SAVE_RESET_STATE(Save) \
64 if (Save) \
65 saved_state = *statep; \
66 else \
67 *statep = saved_state
68
69
70 /* During Shift_JISX0213 to UCS-4 conversion, the COUNT element of the state
71 contains the last UCS-4 character, shifted by 3 bits.
72 During UCS-4 to Shift_JISX0213 conversion, the COUNT element of the state
73 contains the last two bytes to be output, shifted by 3 bits. */
74
75 /* Since this is a stateful encoding we have to provide code which resets
76 the output state to the initial state. This has to be done during the
77 flushing. */
78 #define EMIT_SHIFT_TO_INIT \
79 if (data->__statep->__count != 0) \
80 { \
81 if (FROM_DIRECTION) \
82 { \
83 if (__builtin_expect (outbuf + 4 <= outend, 1)) \
84 { \
85 /* Write out the last character. */ \
86 *((uint32_t *) outbuf) = data->__statep->__count >> 3; \
87 outbuf += sizeof (uint32_t); \
88 data->__statep->__count = 0; \
89 } \
90 else \
91 /* We don't have enough room in the output buffer. */ \
92 status = __GCONV_FULL_OUTPUT; \
93 } \
94 else \
95 { \
96 if (__builtin_expect (outbuf + 2 <= outend, 1)) \
97 { \
98 /* Write out the last character. */ \
99 uint32_t lasttwo = data->__statep->__count >> 3; \
100 *outbuf++ = (lasttwo >> 8) & 0xff; \
101 *outbuf++ = lasttwo & 0xff; \
102 data->__statep->__count = 0; \
103 } \
104 else \
105 /* We don't have enough room in the output buffer. */ \
106 status = __GCONV_FULL_OUTPUT; \
107 } \
108 }
109
110
111 /* First define the conversion function from Shift_JISX0213 to UCS-4. */
112 #define MIN_NEEDED_INPUT FROM_LOOP_MIN_NEEDED_FROM
113 #define MAX_NEEDED_INPUT FROM_LOOP_MAX_NEEDED_FROM
114 #define MIN_NEEDED_OUTPUT FROM_LOOP_MIN_NEEDED_TO
115 #define MAX_NEEDED_OUTPUT FROM_LOOP_MAX_NEEDED_TO
116 #define LOOPFCT FROM_LOOP
117 #define BODY \
118 { \
119 uint32_t ch; \
120 \
121 /* Determine whether there is a buffered character pending. */ \
122 ch = *statep >> 3; \
123 if (__builtin_expect (ch == 0, 1)) \
124 { \
125 /* No - so look at the next input byte. */ \
126 ch = *inptr; \
127 \
128 if (ch < 0x80) \
129 { \
130 /* Plain ISO646-JP character. */ \
131 if (__builtin_expect (ch == 0x5c, 0)) \
132 ch = 0xa5; \
133 else if (__builtin_expect (ch == 0x7e, 0)) \
134 ch = 0x203e; \
135 ++inptr; \
136 } \
137 else if (ch >= 0xa1 && ch <= 0xdf) \
138 { \
139 /* Half-width katakana. */ \
140 ch += 0xfec0; \
141 ++inptr; \
142 } \
143 else if ((ch >= 0x81 && ch <= 0x9f) || (ch >= 0xe0 && ch <= 0xfc)) \
144 { \
145 /* Two byte character. */ \
146 uint32_t ch2; \
147 \
148 if (__builtin_expect (inptr + 1 >= inend, 0)) \
149 { \
150 /* The second byte is not available. */ \
151 result = __GCONV_INCOMPLETE_INPUT; \
152 break; \
153 } \
154 \
155 ch2 = inptr[1]; \
156 \
157 /* The second byte must be in the range 0x{40..7E,80..FC}. */ \
158 if (__builtin_expect (ch2 < 0x40 || ch2 == 0x7f || ch2 > 0xfc, 0))\
159 { \
160 /* This is an illegal character. */ \
161 STANDARD_FROM_LOOP_ERR_HANDLER (1); \
162 } \
163 \
164 /* Convert to row and column. */ \
165 if (ch < 0xe0) \
166 ch -= 0x81; \
167 else \
168 ch -= 0xc1; \
169 if (ch2 < 0x80) \
170 ch2 -= 0x40; \
171 else \
172 ch2 -= 0x41; \
173 /* Now 0 <= ch <= 0x3b, 0 <= ch2 <= 0xbb. */ \
174 ch = 2 * ch; \
175 if (ch2 >= 0x5e) \
176 ch2 -= 0x5e, ch++; \
177 ch2 += 0x21; \
178 if (ch >= 0x5e) \
179 { \
180 /* Handling of JISX 0213 plane 2 rows. */ \
181 if (ch >= 0x67) \
182 ch += 230; \
183 else if (ch >= 0x63 || ch == 0x5f) \
184 ch += 168; \
185 else \
186 ch += 162; \
187 } \
188 \
189 ch = jisx0213_to_ucs4 (0x121 + ch, ch2); \
190 \
191 if (ch == 0) \
192 { \
193 /* This is an illegal character. */ \
194 STANDARD_FROM_LOOP_ERR_HANDLER (1); \
195 } \
196 \
197 inptr += 2; \
198 \
199 if (ch < 0x80) \
200 { \
201 /* It's a combining character. */ \
202 uint32_t u1 = __jisx0213_to_ucs_combining[ch - 1][0]; \
203 uint32_t u2 = __jisx0213_to_ucs_combining[ch - 1][1]; \
204 \
205 put32 (outptr, u1); \
206 outptr += 4; \
207 \
208 /* See whether we have room for two characters. */ \
209 if (outptr + 4 <= outend) \
210 { \
211 put32 (outptr, u2); \
212 outptr += 4; \
213 continue; \
214 } \
215 \
216 /* Otherwise store only the first character now, and \
217 put the second one into the queue. */ \
218 *statep = u2 << 3; \
219 /* Tell the caller why we terminate the loop. */ \
220 result = __GCONV_FULL_OUTPUT; \
221 break; \
222 } \
223 } \
224 else \
225 { \
226 /* This is illegal. */ \
227 STANDARD_FROM_LOOP_ERR_HANDLER (1); \
228 } \
229 } \
230 \
231 put32 (outptr, ch); \
232 outptr += 4; \
233 }
234 #define LOOP_NEED_FLAGS
235 #define EXTRA_LOOP_DECLS , int *statep
236 #define ONEBYTE_BODY \
237 { \
238 if (c < 0x80) \
239 { \
240 if (c == 0x5c) \
241 return 0xa5; \
242 if (c == 0x7e) \
243 return 0x203e; \
244 return c; \
245 } \
246 if (c >= 0xa1 && c <= 0xdf) \
247 return 0xfec0 + c; \
248 return WEOF; \
249 }
250 #include <iconv/loop.c>
251
252
253 /* Next, define the other direction, from UCS-4 to Shift_JISX0213. */
254
255 /* Composition tables for each of the relevant combining characters. */
256 static const struct
257 {
258 uint16_t base;
259 uint16_t composed;
260 } comp_table_data[] =
261 {
262 #define COMP_TABLE_IDX_02E5 0
263 #define COMP_TABLE_LEN_02E5 1
264 { 0x8684, 0x8685 }, /* 0x12B65 = 0x12B64 U+02E5 */
265 #define COMP_TABLE_IDX_02E9 (COMP_TABLE_IDX_02E5 + COMP_TABLE_LEN_02E5)
266 #define COMP_TABLE_LEN_02E9 1
267 { 0x8680, 0x8686 }, /* 0x12B66 = 0x12B60 U+02E9 */
268 #define COMP_TABLE_IDX_0300 (COMP_TABLE_IDX_02E9 + COMP_TABLE_LEN_02E9)
269 #define COMP_TABLE_LEN_0300 5
270 { 0x857b, 0x8663 }, /* 0x12B44 = 0x1295C U+0300 */
271 { 0x8657, 0x8667 }, /* 0x12B48 = 0x12B38 U+0300 */
272 { 0x8656, 0x8669 }, /* 0x12B4A = 0x12B37 U+0300 */
273 { 0x864f, 0x866b }, /* 0x12B4C = 0x12B30 U+0300 */
274 { 0x8662, 0x866d }, /* 0x12B4E = 0x12B43 U+0300 */
275 #define COMP_TABLE_IDX_0301 (COMP_TABLE_IDX_0300 + COMP_TABLE_LEN_0300)
276 #define COMP_TABLE_LEN_0301 4
277 { 0x8657, 0x8668 }, /* 0x12B49 = 0x12B38 U+0301 */
278 { 0x8656, 0x866a }, /* 0x12B4B = 0x12B37 U+0301 */
279 { 0x864f, 0x866c }, /* 0x12B4D = 0x12B30 U+0301 */
280 { 0x8662, 0x866e }, /* 0x12B4F = 0x12B43 U+0301 */
281 #define COMP_TABLE_IDX_309A (COMP_TABLE_IDX_0301 + COMP_TABLE_LEN_0301)
282 #define COMP_TABLE_LEN_309A 14
283 { 0x82a9, 0x82f5 }, /* 0x12477 = 0x1242B U+309A */
284 { 0x82ab, 0x82f6 }, /* 0x12478 = 0x1242D U+309A */
285 { 0x82ad, 0x82f7 }, /* 0x12479 = 0x1242F U+309A */
286 { 0x82af, 0x82f8 }, /* 0x1247A = 0x12431 U+309A */
287 { 0x82b1, 0x82f9 }, /* 0x1247B = 0x12433 U+309A */
288 { 0x834a, 0x8397 }, /* 0x12577 = 0x1252B U+309A */
289 { 0x834c, 0x8398 }, /* 0x12578 = 0x1252D U+309A */
290 { 0x834e, 0x8399 }, /* 0x12579 = 0x1252F U+309A */
291 { 0x8350, 0x839a }, /* 0x1257A = 0x12531 U+309A */
292 { 0x8352, 0x839b }, /* 0x1257B = 0x12533 U+309A */
293 { 0x835a, 0x839c }, /* 0x1257C = 0x1253B U+309A */
294 { 0x8363, 0x839d }, /* 0x1257D = 0x12544 U+309A */
295 { 0x8367, 0x839e }, /* 0x1257E = 0x12548 U+309A */
296 { 0x83f3, 0x83f6 }, /* 0x12678 = 0x12675 U+309A */
297 };
298
299 #define MIN_NEEDED_INPUT TO_LOOP_MIN_NEEDED_FROM
300 #define MAX_NEEDED_INPUT TO_LOOP_MAX_NEEDED_FROM
301 #define MIN_NEEDED_OUTPUT TO_LOOP_MIN_NEEDED_TO
302 #define MAX_NEEDED_OUTPUT TO_LOOP_MAX_NEEDED_TO
303 #define LOOPFCT TO_LOOP
304 #define BODY \
305 { \
306 uint32_t ch = get32 (inptr); \
307 \
308 if ((*statep >> 3) != 0) \
309 { \
310 /* Attempt to combine the last character with this one. */ \
311 uint16_t lasttwo = *statep >> 3; \
312 unsigned int idx; \
313 unsigned int len; \
314 \
315 if (ch == 0x02e5) \
316 idx = COMP_TABLE_IDX_02E5, len = COMP_TABLE_LEN_02E5; \
317 else if (ch == 0x02e9) \
318 idx = COMP_TABLE_IDX_02E9, len = COMP_TABLE_LEN_02E9; \
319 else if (ch == 0x0300) \
320 idx = COMP_TABLE_IDX_0300, len = COMP_TABLE_LEN_0300; \
321 else if (ch == 0x0301) \
322 idx = COMP_TABLE_IDX_0301, len = COMP_TABLE_LEN_0301; \
323 else if (ch == 0x309a) \
324 idx = COMP_TABLE_IDX_309A, len = COMP_TABLE_LEN_309A; \
325 else \
326 goto not_combining; \
327 \
328 do \
329 if (comp_table_data[idx].base == lasttwo) \
330 break; \
331 while (++idx, --len > 0); \
332 \
333 if (len > 0) \
334 { \
335 /* Output the combined character. */ \
336 if (__builtin_expect (outptr + 1 >= outend, 0)) \
337 { \
338 result = __GCONV_FULL_OUTPUT; \
339 break; \
340 } \
341 lasttwo = comp_table_data[idx].composed; \
342 *outptr++ = (lasttwo >> 8) & 0xff; \
343 *outptr++ = lasttwo & 0xff; \
344 *statep = 0; \
345 inptr += 4; \
346 continue; \
347 } \
348 \
349 not_combining: \
350 /* Output the buffered character. */ \
351 if (__builtin_expect (outptr + 1 >= outend, 0)) \
352 { \
353 result = __GCONV_FULL_OUTPUT; \
354 break; \
355 } \
356 *outptr++ = (lasttwo >> 8) & 0xff; \
357 *outptr++ = lasttwo & 0xff; \
358 *statep = 0; \
359 continue; \
360 } \
361 \
362 if (ch < 0x80) \
363 /* Plain ISO646-JP character. */ \
364 *outptr++ = ch; \
365 else if (ch == 0xa5) \
366 *outptr++ = 0x5c; \
367 else if (ch == 0x203e) \
368 *outptr++ = 0x7e; \
369 else if (ch >= 0xff61 && ch <= 0xff9f) \
370 /* Half-width katakana. */ \
371 *outptr++ = ch - 0xfec0; \
372 else \
373 { \
374 unsigned int s1, s2; \
375 uint32_t jch = ucs4_to_jisx0213 (ch); \
376 if (jch == 0) \
377 { \
378 UNICODE_TAG_HANDLER (ch, 4); \
379 \
380 /* Illegal character. */ \
381 STANDARD_TO_LOOP_ERR_HANDLER (4); \
382 } \
383 \
384 /* Convert it to shifted representation. */ \
385 s1 = jch >> 8; \
386 s2 = jch & 0x7f; \
387 s1 -= 0x21; \
388 s2 -= 0x21; \
389 if (s1 >= 0x5e) \
390 { \
391 /* Handling of JISX 0213 plane 2 rows. */ \
392 if (s1 >= 0xcd) /* rows 0x26E..0x27E */ \
393 s1 -= 102; \
394 else if (s1 >= 0x8b || s1 == 0x87) /* rows 0x228, 0x22C..0x22F */ \
395 s1 -= 40; \
396 else /* rows 0x221, 0x223..0x225 */ \
397 s1 -= 34; \
398 /* Now 0x5e <= s1 <= 0x77. */ \
399 } \
400 if (s1 & 1) \
401 s2 += 0x5e; \
402 s1 = s1 >> 1; \
403 if (s1 < 0x1f) \
404 s1 += 0x81; \
405 else \
406 s1 += 0xc1; \
407 if (s2 < 0x3f) \
408 s2 += 0x40; \
409 else \
410 s2 += 0x41; \
411 \
412 if (jch & 0x0080) \
413 { \
414 /* A possible match in comp_table_data. We have to buffer it. */\
415 \
416 /* We know it's a JISX 0213 plane 1 character. */ \
417 assert ((jch & 0x8000) == 0); \
418 \
419 *statep = ((s1 << 8) | s2) << 3; \
420 inptr += 4; \
421 continue; \
422 } \
423 \
424 /* Output the shifted representation. */ \
425 if (__builtin_expect (outptr + 1 >= outend, 0)) \
426 { \
427 result = __GCONV_FULL_OUTPUT; \
428 break; \
429 } \
430 *outptr++ = s1; \
431 *outptr++ = s2; \
432 } \
433 \
434 inptr += 4; \
435 }
436 #define LOOP_NEED_FLAGS
437 #define EXTRA_LOOP_DECLS , int *statep
438 #include <iconv/loop.c>
439
440
441 /* Now define the toplevel functions. */
442 #include <iconv/skeleton.c>
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