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192.168.1.100 / T106_DC / 58be67c407dfd23e6b43bf455ccb5c043aba7ed8 / . / ap / libc / glibc / glibc-2.23 / iconvdata / ibm1364.c
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xf.libdd93d52023-05-12 07:10:14 -0700[diff] [blame]1/* Conversion from and to IBM1364.
2 Copyright (C) 2005-2016 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Masahide Washizawa <washi@jp.ibm.com>, 2005.
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, see
18 <http://www.gnu.org/licenses/>. */
19
20#include <dlfcn.h>
21#include <stdint.h>
22#include <wchar.h>
23#include <byteswap.h>
24
25#ifndef CHARSET_NAME
26/* This is really the IBM1364 converter, not another module sharing
27 the code. */
28# define DATA_HEADER "ibm1364.h"
29# define CHARSET_NAME "IBM1364//"
30# define FROM_LOOP from_ibm1364
31# define TO_LOOP to_ibm1364
32# define SB_TO_UCS4 __ibm1364sb_to_ucs4
33# define DB_TO_UCS4_IDX __ibm1364db_to_ucs4_idx
34# define DB_TO_UCS4 __ibm1364db_to_ucs4
35# define UCS4_TO_SB_IDX __ucs4_to_ibm1364sb_idx
36# define UCS4_TO_SB __ucs4_to_ibm1364sb
37# define UCS4_TO_DB_IDX __ucs4_to_ibm1364db_idx
38# define UCS4_TO_DB __ucs4_to_ibm1364db
39# define UCS_LIMIT 0xffff
40#endif
41
42
43#include DATA_HEADER
44
45/* The shift sequences for this charset (it does not use ESC). */
46#define SI 0x0F /* Shift In, host code to turn DBCS off. */
47#define SO 0x0E /* Shift Out, host code to turn DBCS on. */
48
49/* Definitions used in the body of the `gconv' function. */
50#define MIN_NEEDED_FROM 1
51#define MAX_NEEDED_FROM 2
52#define MIN_NEEDED_TO 4
53#ifdef HAS_COMBINED
54# define MAX_NEEDED_TO 8
55#else
56# define MAX_NEEDED_TO 4
57#endif
58#define ONE_DIRECTION 0
59#define PREPARE_LOOP \
60 int save_curcs; \
61 int *curcsp = &data->__statep->__count;
62#define EXTRA_LOOP_ARGS , curcsp
63
64/* Definitions of initialization and destructor function. */
65#define DEFINE_INIT 1
66#define DEFINE_FINI 1
67
68
69/* Since this is a stateful encoding we have to provide code which resets
70 the output state to the initial state. This has to be done during the
71 flushing. */
72#define EMIT_SHIFT_TO_INIT \
73 if ((data->__statep->__count & ~7) != sb) \
74 { \
75 if (FROM_DIRECTION) \
76 data->__statep->__count &= 7; \
77 else \
78 { \
79 /* We are not in the initial state. To switch back we have \
80 to emit `SI'. */ \
81 if (__glibc_unlikely (outbuf >= outend)) \
82 /* We don't have enough room in the output buffer. */ \
83 status = __GCONV_FULL_OUTPUT; \
84 else \
85 { \
86 /* Write out the shift sequence. */ \
87 *outbuf++ = SI; \
88 data->__statep->__count &= 7; \
89 } \
90 } \
91 }
92
93
94/* Since we might have to reset input pointer we must be able to save
95 and retore the state. */
96#define SAVE_RESET_STATE(Save) \
97 if (Save) \
98 save_curcs = *curcsp; \
99 else \
100 *curcsp = save_curcs
101
102
103/* Current codeset type. */
104enum
105{
106 sb = 0,
107 db = 64
108};
109
110
111/* Subroutine to write out converted UCS4 from IBM-13XX. */
112#ifdef HAS_COMBINED
113# define SUB_COMBINED_UCS_FROM_IBM13XX \
114 { \
115 if (res != UCS_LIMIT || ch < __TO_UCS4_COMBINED_MIN \
116 || ch > __TO_UCS4_COMBINED_MAX) \
117 { \
118 put32 (outptr, res); \
119 outptr += 4; \
120 } \
121 else \
122 { \
123 /* This is a combined character. Make sure we have room. */ \
124 if (__glibc_unlikely (outptr + 8 > outend)) \
125 { \
126 result = __GCONV_FULL_OUTPUT; \
127 break; \
128 } \
129 \
130 const struct divide *cmbp \
131 = &DB_TO_UCS4_COMB[ch - __TO_UCS4_COMBINED_MIN]; \
132 assert (cmbp->res1 != 0 && cmbp->res2 != 0); \
133 \
134 put32 (outptr, cmbp->res1); \
135 outptr += 4; \
136 put32 (outptr, cmbp->res2); \
137 outptr += 4; \
138 } \
139 }
140#else
141# define SUB_COMBINED_UCS_FROM_IBM13XX \
142 { \
143 put32 (outptr, res); \
144 outptr += 4; \
145 }
146#endif /* HAS_COMBINED */
147
148
149/* First, define the conversion function from IBM-13XX to UCS4. */
150#define MIN_NEEDED_INPUT MIN_NEEDED_FROM
151#define MAX_NEEDED_INPUT MAX_NEEDED_FROM
152#define MIN_NEEDED_OUTPUT MIN_NEEDED_TO
153#define LOOPFCT FROM_LOOP
154#define BODY \
155 { \
156 uint32_t ch = *inptr; \
157 \
158 if (__builtin_expect (ch, 0) == SO) \
159 { \
160 /* Shift OUT, change to DBCS converter. */ \
161 if (curcs == db) \
162 { \
163 result = __GCONV_ILLEGAL_INPUT; \
164 break; \
165 } \
166 curcs = db; \
167 ++inptr; \
168 continue; \
169 } \
170 if (__builtin_expect (ch, 0) == SI) \
171 { \
172 /* Shift IN, change to SBCS converter. */ \
173 if (curcs == sb) \
174 { \
175 result = __GCONV_ILLEGAL_INPUT; \
176 break; \
177 } \
178 curcs = sb; \
179 ++inptr; \
180 continue; \
181 } \
182 \
183 if (curcs == sb) \
184 { \
185 /* Use the IBM13XX table for single byte. */ \
186 uint32_t res = SB_TO_UCS4[ch]; \
187 if (__builtin_expect (res, L'\1') == L'\0' && ch != '\0') \
188 { \
189 /* This is an illegal character. */ \
190 if (! ignore_errors_p ()) \
191 { \
192 result = __GCONV_ILLEGAL_INPUT; \
193 break; \
194 } \
195 ++*irreversible; \
196 } \
197 else \
198 { \
199 put32 (outptr, res); \
200 outptr += 4; \
201 } \
202 ++inptr; \
203 } \
204 else \
205 { \
206 assert (curcs == db); \
207 \
208 if (__glibc_unlikely (inptr + 1 >= inend)) \
209 { \
210 /* The second character is not available. Store the \
211 intermediate result. */ \
212 result = __GCONV_INCOMPLETE_INPUT; \
213 break; \
214 } \
215 \
216 ch = (ch * 0x100) + inptr[1]; \
217 \
218 /* Use the IBM1364 table for double byte. */ \
219 const struct gap *rp2 = DB_TO_UCS4_IDX; \
220 while (ch > rp2->end) \
221 ++rp2; \
222 \
223 uint32_t res; \
224 if (__builtin_expect (rp2->start == 0xffff, 0) \
225 || __builtin_expect (ch < rp2->start, 0) \
226 || (res = DB_TO_UCS4[ch + rp2->idx], \
227 __builtin_expect (res, L'\1') == L'\0' && ch != '\0')) \
228 { \
229 /* This is an illegal character. */ \
230 if (! ignore_errors_p ()) \
231 { \
232 result = __GCONV_ILLEGAL_INPUT; \
233 break; \
234 } \
235 ++*irreversible; \
236 } \
237 else \
238 { \
239 SUB_COMBINED_UCS_FROM_IBM13XX; \
240 } \
241 inptr += 2; \
242 } \
243 }
244#define LOOP_NEED_FLAGS
245#define EXTRA_LOOP_DECLS , int *curcsp
246#define INIT_PARAMS int curcs = *curcsp & ~7
247#define UPDATE_PARAMS *curcsp = curcs
248#include <iconv/loop.c>
249
250
251/* Subroutine to convert two UCS4 codes to IBM-13XX. */
252#ifdef HAS_COMBINED
253# define SUB_COMBINED_UCS_TO_IBM13XX \
254 { \
255 const struct combine *cmbp = UCS4_COMB_TO_DB; \
256 while (cmbp->res1 < ch) \
257 ++cmbp; \
258 /* XXX if last char is beginning of combining store in state */ \
259 if (cmbp->res1 == ch && inptr + 4 < inend) \
260 { \
261 /* See if input is part of a combined character. */ \
262 uint32_t ch_next = get32 (inptr + 4); \
263 while (cmbp->res2 != ch_next) \
264 { \
265 ++cmbp; \
266 if (cmbp->res1 != ch) \
267 goto not_combined; \
268 } \
269 \
270 /* It is a combined character. First make sure we are in \
271 double byte mode. */ \
272 if (curcs == sb) \
273 { \
274 /* We know there is room for at least one byte. */ \
275 *outptr++ = SO; \
276 curcs = db; \
277 } \
278 \
279 if (__glibc_unlikely (outptr + 2 > outend)) \
280 { \
281 result = __GCONV_FULL_OUTPUT; \
282 break; \
283 } \
284 *outptr++ = cmbp->ch[0]; \
285 *outptr++ = cmbp->ch[1]; \
286 inptr += 8; \
287 continue; \
288 \
289 not_combined:; \
290 } \
291 }
292#else
293# define SUB_COMBINED_UCS_TO_IBM13XX
294#endif /* HAS_COMBINED */
295
296
297/* Next, define the other direction. */
298#define MIN_NEEDED_INPUT MIN_NEEDED_TO
299#define MIN_NEEDED_OUTPUT MIN_NEEDED_FROM
300#define MAX_NEEDED_OUTPUT MAX_NEEDED_FROM
301#define LOOPFCT TO_LOOP
302#define BODY \
303 { \
304 uint32_t ch = get32 (inptr); \
305 \
306 if (__glibc_unlikely (ch >= UCS_LIMIT)) \
307 { \
308 UNICODE_TAG_HANDLER (ch, 4); \
309 \
310 if (! ignore_errors_p ()) \
311 { \
312 result = __GCONV_ILLEGAL_INPUT; \
313 break; \
314 } \
315 ++*irreversible; \
316 inptr += 4; \
317 continue; \
318 } \
319 \
320 SUB_COMBINED_UCS_TO_IBM13XX; \
321 \
322 const struct gap *rp1 = UCS4_TO_SB_IDX; \
323 while (ch > rp1->end) \
324 ++rp1; \
325 \
326 /* Use the UCS4 table for single byte. */ \
327 const char *cp; \
328 if (__builtin_expect (ch < rp1->start, 0) \
329 || (cp = UCS4_TO_SB[ch + rp1->idx], \
330 __builtin_expect (cp[0], L'\1') == L'\0' && ch != '\0')) \
331 { \
332 /* Use the UCS4 table for double byte. */ \
333 const struct gap *rp2 = UCS4_TO_DB_IDX; \
334 while (ch > rp2->end) \
335 ++rp2; \
336 \
337 if (__builtin_expect (ch < rp2->start, 0) \
338 || (cp = UCS4_TO_DB[ch + rp2->idx], \
339 __builtin_expect (cp[0], L'\1') == L'\0' && ch != '\0')) \
340 { \
341 /* This is an illegal character. */ \
342 if (! ignore_errors_p ()) \
343 { \
344 result = __GCONV_ILLEGAL_INPUT; \
345 break; \
346 } \
347 ++*irreversible; \
348 } \
349 else \
350 { \
351 if (curcs == sb) \
352 { \
353 /* We know there is room for at least one byte. */ \
354 *outptr++ = SO; \
355 curcs = db; \
356 } \
357 \
358 if (__glibc_unlikely (outptr + 2 > outend)) \
359 { \
360 result = __GCONV_FULL_OUTPUT; \
361 break; \
362 } \
363 *outptr++ = cp[0]; \
364 *outptr++ = cp[1]; \
365 } \
366 } \
367 else \
368 { \
369 if (__glibc_unlikely (curcs == db)) \
370 { \
371 /* We know there is room for at least one byte. */ \
372 *outptr++ = SI; \
373 curcs = sb; \
374 \
375 if (__glibc_unlikely (outptr >= outend)) \
376 { \
377 result = __GCONV_FULL_OUTPUT; \
378 break; \
379 } \
380 } \
381 \
382 *outptr++ = cp[0]; \
383 } \
384 \
385 /* Now that we wrote the output increment the input pointer. */ \
386 inptr += 4; \
387 }
388#define LOOP_NEED_FLAGS
389#define EXTRA_LOOP_DECLS , int *curcsp
390#define INIT_PARAMS int curcs = *curcsp & ~7
391#define REINIT_PARAMS curcs = *curcsp & ~7
392#define UPDATE_PARAMS *curcsp = curcs
393#include <iconv/loop.c>
394
395/* Now define the toplevel functions. */
396#include <iconv/skeleton.c>