aboutsummaryrefslogtreecommitdiff
path: root/iconvdata/shift_jisx0213.c
blob: 119e0017b9b75829494f897bdcb0d42b6a03ef11 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
/* Conversion from and to Shift_JISX0213.
   Copyright (C) 2002 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Bruno Haible <bruno@clisp.org>, 2002.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <dlfcn.h>
#include <stdint.h>
#include <gconv.h>

/* The structure of Shift_JISX0213 is as follows:

   0x00..0x7F: ISO646-JP, an ASCII variant

   0x{A1..DF}: JISX0201 Katakana.

   0x{81..9F,E0..EF}{40..7E,80..FC}: JISX0213 plane 1.

   0x{F0..FC}{40..7E,80..FC}: JISX0213 plane 2, with irregular row mapping.

   Note that some JISX0213 characters are not contained in Unicode 3.2
   and are therefore best represented as sequences of Unicode characters.
*/

#include "jisx0213.h"

/* Definitions used in the body of the `gconv' function.  */
#define CHARSET_NAME		"SHIFT_JISX0213//"
#define FROM_LOOP		from_shift_jisx0213
#define TO_LOOP			to_shift_jisx0213
#define DEFINE_INIT		1
#define DEFINE_FINI		1
#define FROM_LOOP_MIN_NEEDED_FROM	1
#define FROM_LOOP_MAX_NEEDED_FROM	2
#define FROM_LOOP_MIN_NEEDED_TO		4
#define FROM_LOOP_MAX_NEEDED_TO		8
#define TO_LOOP_MIN_NEEDED_FROM		4
#define TO_LOOP_MAX_NEEDED_FROM		4
#define TO_LOOP_MIN_NEEDED_TO		1
#define TO_LOOP_MAX_NEEDED_TO		2
#define PREPARE_LOOP \
  int saved_state;							      \
  int *statep = &data->__statep->__count;
#define EXTRA_LOOP_ARGS		, statep


/* Since we might have to reset input pointer we must be able to save
   and restore the state.  */
#define SAVE_RESET_STATE(Save) \
  if (Save)								      \
    saved_state = *statep;						      \
  else									      \
    *statep = saved_state


/* During Shift_JISX0213 to UCS-4 conversion, the COUNT element of the state
   contains the last UCS-4 character, shifted by 3 bits.
   During UCS-4 to Shift_JISX0213 conversion, the COUNT element of the state
   contains the last two bytes to be output, shifted by 3 bits.  */

/* Since this is a stateful encoding we have to provide code which resets
   the output state to the initial state.  This has to be done during the
   flushing.  */
#define EMIT_SHIFT_TO_INIT \
  if (data->__statep->__count != 0)					      \
    {									      \
      if (FROM_DIRECTION)						      \
	{								      \
	  if (__builtin_expect (outbuf + 4 <= outend, 1))		      \
	    {								      \
	      /* Write out the last character.  */			      \
	      *((uint32_t *) outbuf)++ = data->__statep->__count >> 3;	      \
	      data->__statep->__count = 0;				      \
	    }								      \
	  else								      \
	    /* We don't have enough room in the output buffer.  */	      \
	    status = __GCONV_FULL_OUTPUT;				      \
	}								      \
      else								      \
	{								      \
	  if (__builtin_expect (outbuf + 2 <= outend, 1))		      \
	    {								      \
	      /* Write out the last character.  */			      \
	      uint32_t lasttwo = data->__statep->__count >> 3;		      \
	      *outbuf++ = (lasttwo >> 8) & 0xff;			      \
	      *outbuf++ = lasttwo & 0xff;				      \
	      data->__statep->__count = 0;				      \
	    }								      \
	  else								      \
	    /* We don't have enough room in the output buffer.  */	      \
	    status = __GCONV_FULL_OUTPUT;				      \
	}								      \
    }


/* First define the conversion function from Shift_JISX0213 to UCS-4.  */
#define MIN_NEEDED_INPUT	FROM_LOOP_MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT	FROM_LOOP_MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	FROM_LOOP_MIN_NEEDED_TO
#define MAX_NEEDED_OUTPUT	FROM_LOOP_MAX_NEEDED_TO
#define LOOPFCT			FROM_LOOP
#define BODY \
  {									      \
    uint32_t ch;							      \
									      \
    /* Determine whether there is a buffered character pending.  */	      \
    ch = *statep >> 3;							      \
    if (__builtin_expect (ch == 0, 1))					      \
      {									      \
	/* No - so look at the next input byte.  */			      \
	ch = *inptr;							      \
									      \
	if (ch < 0x80)							      \
	  {								      \
	    /* Plain ISO646-JP character.  */				      \
	    if (__builtin_expect (ch == 0x5c, 0))			      \
	      ch = 0xa5;						      \
	    else if (__builtin_expect (ch == 0x7e, 0))			      \
	      ch = 0x203e;						      \
	    ++inptr;							      \
	  }								      \
	else if (ch >= 0xa1 && ch <= 0xdf)				      \
	  {								      \
	    /* Half-width katakana.  */					      \
	    ch += 0xfec0;						      \
	    ++inptr;							      \
	  }								      \
	else if ((ch >= 0x81 && ch <= 0x9f) || (ch >= 0xe0 && ch <= 0xfc))    \
	  {								      \
	    /* Two byte character.  */					      \
	    uint32_t ch2;						      \
									      \
	    if (__builtin_expect (inptr + 1 >= inend, 0))		      \
	      {								      \
		/* The second byte is not available.  */		      \
		result = __GCONV_INCOMPLETE_INPUT;			      \
		break;							      \
	      }								      \
									      \
	    ch2 = inptr[1];						      \
									      \
	    /* The second byte must be in the range 0x{40..7E,80..FC}.  */    \
	    if (__builtin_expect (ch2 < 0x40 || ch2 == 0x7f || ch2 > 0xfc, 0))\
	      {								      \
		/* This is an illegal character.  */			      \
		STANDARD_FROM_LOOP_ERR_HANDLER (1);			      \
	      }								      \
									      \
	    /* Convert to row and column.  */				      \
	    if (ch < 0xe0)						      \
	      ch -= 0x81;						      \
	    else							      \
	      ch -= 0xc1;						      \
	    if (ch2 < 0x80)						      \
	      ch2 -= 0x40;						      \
	    else							      \
	      ch2 -= 0x41;						      \
	    /* Now 0 <= ch <= 0x3b, 0 <= ch2 <= 0xbb.  */		      \
	    ch = 2 * ch;						      \
	    if (ch2 >= 0x5e)						      \
	      ch2 -= 0x5e, ch++;					      \
	    ch2 += 0x21;						      \
	    if (ch >= 0x5e)						      \
	      {								      \
		/* Handling of JISX 0213 plane 2 rows.  */		      \
		if (ch >= 0x67)						      \
		  ch += 230;						      \
		else if (ch >= 0x63 || ch == 0x5f)			      \
		  ch += 168;						      \
		else 							      \
		  ch += 162;						      \
	      }								      \
									      \
	    ch = jisx0213_to_ucs4 (0x121 + ch, ch2);			      \
									      \
	    if (ch == 0)						      \
	      {								      \
		/* This is an illegal character.  */			      \
		STANDARD_FROM_LOOP_ERR_HANDLER (1);			      \
	      }								      \
									      \
	    inptr += 2;							      \
									      \
	    if (ch < 0x80)						      \
	      {								      \
		/* It's a combining character.  */			      \
		uint32_t u1 = __jisx0213_to_ucs_combining[ch - 1][0];	      \
		uint32_t u2 = __jisx0213_to_ucs_combining[ch - 1][1];	      \
									      \
		put32 (outptr, u1);					      \
		outptr += 4;						      \
									      \
		/* See whether we have room for two characters.  */	      \
		if (outptr + 4 <= outend)				      \
		  {							      \
		    put32 (outptr, u2);					      \
		    outptr += 4;					      \
		    continue;						      \
		  }							      \
									      \
		/* Otherwise store only the first character now, and	      \
		   put the second one into the queue.  */		      \
		*statep = u2 << 3;					      \
		/* Tell the caller why we terminate the loop.  */	      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	  }								      \
	else								      \
	  {								      \
	    /* This is illegal.  */					      \
	    STANDARD_FROM_LOOP_ERR_HANDLER (1);				      \
	  }								      \
      }									      \
									      \
    put32 (outptr, ch);							      \
    outptr += 4;							      \
  }
#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS	, int *statep
#include <iconv/loop.c>


/* Next, define the other direction, from UCS-4 to Shift_JISX0213.  */

/* Composition tables for each of the relevant combining characters.  */
static const struct
{
  uint16_t base;
  uint16_t composed;
} comp_table_data[] =
{
#define COMP_TABLE_IDX_02E5 0
#define COMP_TABLE_LEN_02E5 1
  { 0x8684, 0x8685 }, /* 0x12B65 = 0x12B64 U+02E5 */
#define COMP_TABLE_IDX_02E9 (COMP_TABLE_IDX_02E5 + COMP_TABLE_LEN_02E5)
#define COMP_TABLE_LEN_02E9 1
  { 0x8680, 0x8686 }, /* 0x12B66 = 0x12B60 U+02E9 */
#define COMP_TABLE_IDX_0300 (COMP_TABLE_IDX_02E9 + COMP_TABLE_LEN_02E9)
#define COMP_TABLE_LEN_0300 5
  { 0x857b, 0x8663 }, /* 0x12B44 = 0x1295C U+0300 */
  { 0x8657, 0x8667 }, /* 0x12B48 = 0x12B38 U+0300 */
  { 0x8656, 0x8669 }, /* 0x12B4A = 0x12B37 U+0300 */
  { 0x864f, 0x866b }, /* 0x12B4C = 0x12B30 U+0300 */
  { 0x8662, 0x866d }, /* 0x12B4E = 0x12B43 U+0300 */
#define COMP_TABLE_IDX_0301 (COMP_TABLE_IDX_0300 + COMP_TABLE_LEN_0300)
#define COMP_TABLE_LEN_0301 4
  { 0x8657, 0x8668 }, /* 0x12B49 = 0x12B38 U+0301 */
  { 0x8656, 0x866a }, /* 0x12B4B = 0x12B37 U+0301 */
  { 0x864f, 0x866c }, /* 0x12B4D = 0x12B30 U+0301 */
  { 0x8662, 0x866e }, /* 0x12B4F = 0x12B43 U+0301 */
#define COMP_TABLE_IDX_309A (COMP_TABLE_IDX_0301 + COMP_TABLE_LEN_0301)
#define COMP_TABLE_LEN_309A 14
  { 0x82a9, 0x82f5 }, /* 0x12477 = 0x1242B U+309A */
  { 0x82ab, 0x82f6 }, /* 0x12478 = 0x1242D U+309A */
  { 0x82ad, 0x82f7 }, /* 0x12479 = 0x1242F U+309A */
  { 0x82af, 0x82f8 }, /* 0x1247A = 0x12431 U+309A */
  { 0x82b1, 0x82f9 }, /* 0x1247B = 0x12433 U+309A */
  { 0x834a, 0x8397 }, /* 0x12577 = 0x1252B U+309A */
  { 0x834c, 0x8398 }, /* 0x12578 = 0x1252D U+309A */
  { 0x834e, 0x8399 }, /* 0x12579 = 0x1252F U+309A */
  { 0x8350, 0x839a }, /* 0x1257A = 0x12531 U+309A */
  { 0x8352, 0x839b }, /* 0x1257B = 0x12533 U+309A */
  { 0x835a, 0x839c }, /* 0x1257C = 0x1253B U+309A */
  { 0x8363, 0x839d }, /* 0x1257D = 0x12544 U+309A */
  { 0x8367, 0x839e }, /* 0x1257E = 0x12548 U+309A */
  { 0x83f3, 0x83f6 }, /* 0x12678 = 0x12675 U+309A */
};

#define MIN_NEEDED_INPUT	TO_LOOP_MIN_NEEDED_FROM
#define MAX_NEEDED_INPUT	TO_LOOP_MAX_NEEDED_FROM
#define MIN_NEEDED_OUTPUT	TO_LOOP_MIN_NEEDED_TO
#define MAX_NEEDED_OUTPUT	TO_LOOP_MAX_NEEDED_TO
#define LOOPFCT			TO_LOOP
#define BODY \
  {									      \
    uint32_t ch = get32 (inptr);					      \
									      \
    if ((*statep >> 3) != 0)						      \
      {									      \
	/* Attempt to combine the last character with this one.  */	      \
	uint16_t lasttwo = *statep >> 3;				      \
	unsigned int idx;						      \
	unsigned int len;						      \
									      \
	if (ch == 0x02e5)						      \
	  idx = COMP_TABLE_IDX_02E5, len = COMP_TABLE_LEN_02E5;		      \
	else if (ch == 0x02e9)						      \
	  idx = COMP_TABLE_IDX_02E9, len = COMP_TABLE_LEN_02E9;		      \
	else if (ch == 0x0300)						      \
	  idx = COMP_TABLE_IDX_0300, len = COMP_TABLE_LEN_0300;		      \
	else if (ch == 0x0301)						      \
	  idx = COMP_TABLE_IDX_0301, len = COMP_TABLE_LEN_0301;		      \
	else if (ch == 0x309a)						      \
	  idx = COMP_TABLE_IDX_309A, len = COMP_TABLE_LEN_309A;		      \
	else								      \
	  goto not_combining;						      \
									      \
	do								      \
	  if (comp_table_data[idx].base == lasttwo)			      \
	    break;							      \
	while (++idx, --len > 0);					      \
									      \
	if (len > 0)							      \
	  {								      \
	    /* Output the combined character.  */			      \
	    if (__builtin_expect (outptr + 1 >= outend, 0))		      \
	      {								      \
		result = __GCONV_FULL_OUTPUT;				      \
		break;							      \
	      }								      \
	    lasttwo = comp_table_data[idx].composed;			      \
	    *outptr++ = (lasttwo >> 8) & 0xff;				      \
	    *outptr++ = lasttwo & 0xff;					      \
	    *statep = 0;						      \
	    inptr += 4;							      \
	    continue;							      \
	  }								      \
									      \
      not_combining:							      \
	/* Output the buffered character.  */				      \
	if (__builtin_expect (outptr + 1 >= outend, 0))			      \
	  {								      \
	    result = __GCONV_FULL_OUTPUT;				      \
	    break;							      \
	  }								      \
	*outptr++ = (lasttwo >> 8) & 0xff;				      \
	*outptr++ = lasttwo & 0xff;					      \
	*statep = 0;							      \
	continue;							      \
      }									      \
									      \
    if (ch < 0x80)							      \
      /* Plain ISO646-JP character.  */					      \
      *outptr++ = ch;							      \
    else if (ch == 0xa5)						      \
      *outptr++ = 0x5c;							      \
    else if (ch == 0x203e)						      \
      *outptr++ = 0x7e;							      \
    else if (ch >= 0xff61 && ch <= 0xff9f)				      \
      /* Half-width katakana.  */					      \
      *outptr++ = ch - 0xfec0;						      \
    else								      \
      {									      \
	unsigned int s1, s2;						      \
	uint32_t jch = ucs4_to_jisx0213 (ch);				      \
	if (jch == 0)							      \
	  {								      \
	    UNICODE_TAG_HANDLER (ch, 4);				      \
									      \
	    /* Illegal character.  */					      \
	    STANDARD_TO_LOOP_ERR_HANDLER (4);				      \
	  }								      \
									      \
	/* Convert it to shifted representation.  */			      \
	s1 = jch >> 8;							      \
	s2 = jch & 0x7f;							      \
	s1 -= 0x21;							      \
	s2 -= 0x21;							      \
	if (s1 >= 0x5e)							      \
	  {								      \
	    /* Handling of JISX 0213 plane 2 rows.  */			      \
	    if (s1 >= 0xcd) /* rows 0x26E..0x27E */			      \
	      s1 -= 102;						      \
	    else if (s1 >= 0x8b || s1 == 0x87) /* rows 0x228, 0x22C..0x22F */ \
	      s1 -= 40;							      \
	    else /* rows 0x221, 0x223..0x225 */				      \
	      s1 -= 34;							      \
	    /* Now 0x5e <= s1 <= 0x77.  */				      \
	  }								      \
	if (s1 & 1)							      \
	  s2 += 0x5e;							      \
	s1 = s1 >> 1;							      \
	if (s1 < 0x1f)							      \
	  s1 += 0x81;							      \
	else								      \
	  s1 += 0xc1;							      \
	if (s2 < 0x3f)							      \
	  s2 += 0x40;							      \
	else								      \
	  s2 += 0x41;							      \
									      \
	if (jch & 0x0080)						      \
	  {								      \
	    /* A possible match in comp_table_data.  We have to buffer it.  */\
									      \
	    /* We know it's a JISX 0213 plane 1 character.  */		      \
	    assert ((jch & 0x8000) == 0);				      \
									      \
	    *statep = ((s1 << 8) | s2) << 3;				      \
	    inptr += 4;							      \
	    continue;							      \
	  }								      \
									      \
	/* Output the shifted representation.  */			      \
	if (__builtin_expect (outptr + 1 >= outend, 0))			      \
	  {								      \
	    result = __GCONV_FULL_OUTPUT;				      \
	    break;							      \
	  }								      \
	*outptr++ = s1;							      \
	*outptr++ = s2;							      \
      }									      \
									      \
    inptr += 4;								      \
  }
#define LOOP_NEED_FLAGS
#define EXTRA_LOOP_DECLS	, int *statep
#include <iconv/loop.c>


/* Now define the toplevel functions.  */
#include <iconv/skeleton.c>