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1dc72e4f | 1 | /* Copyright (C) 1993,1995,1997,1998,1999,2000,2001 Free Software Foundation, Inc. |
d64b6ad0 UD |
2 | This file is part of the GNU IO Library. |
3 | Written by Ulrich Drepper <drepper@cygnus.com>. | |
4 | Based on the single byte version by Per Bothner <bothner@cygnus.com>. | |
5 | ||
6 | This library is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU General Public License as | |
8 | published by the Free Software Foundation; either version 2, or (at | |
9 | your option) any later version. | |
10 | ||
11 | This library is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this library; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, | |
19 | MA 02111-1307, USA. | |
20 | ||
21 | As a special exception, if you link this library with files | |
22 | compiled with a GNU compiler to produce an executable, this does | |
23 | not cause the resulting executable to be covered by the GNU General | |
24 | Public License. This exception does not however invalidate any | |
25 | other reasons why the executable file might be covered by the GNU | |
26 | General Public License. */ | |
27 | ||
28 | /* Generic or default I/O operations. */ | |
29 | ||
30 | #include "libioP.h" | |
31 | #ifdef __STDC__ | |
32 | #include <stdlib.h> | |
33 | #endif | |
34 | #include <string.h> | |
35 | #include <wchar.h> | |
36 | ||
37 | ||
319d719d UD |
38 | #ifndef _LIBC |
39 | # define __wmemcpy(dst, src, n) wmemcpy (dst, src, n) | |
40 | #endif | |
41 | ||
d64b6ad0 UD |
42 | |
43 | static int save_for_wbackup __P ((_IO_FILE *fp, wchar_t *end_p)) | |
44 | #ifdef _LIBC | |
45 | internal_function | |
46 | #endif | |
47 | ; | |
48 | ||
49 | /* Return minimum _pos markers | |
50 | Assumes the current get area is the main get area. */ | |
51 | _IO_ssize_t _IO_least_wmarker __P ((_IO_FILE *fp, wchar_t *end_p)); | |
52 | ||
53 | _IO_ssize_t | |
54 | _IO_least_wmarker (fp, end_p) | |
55 | _IO_FILE *fp; | |
56 | wchar_t *end_p; | |
57 | { | |
58 | _IO_ssize_t least_so_far = end_p - fp->_wide_data->_IO_read_base; | |
59 | struct _IO_marker *mark; | |
60 | for (mark = fp->_markers; mark != NULL; mark = mark->_next) | |
61 | if (mark->_pos < least_so_far) | |
62 | least_so_far = mark->_pos; | |
63 | return least_so_far; | |
64 | } | |
65 | ||
66 | /* Switch current get area from backup buffer to (start of) main get area. */ | |
67 | void | |
68 | _IO_switch_to_main_wget_area (fp) | |
69 | _IO_FILE *fp; | |
70 | { | |
71 | wchar_t *tmp; | |
72 | fp->_flags &= ~_IO_IN_BACKUP; | |
73 | /* Swap _IO_read_end and _IO_save_end. */ | |
74 | tmp = fp->_wide_data->_IO_read_end; | |
75 | fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_save_end; | |
76 | fp->_wide_data->_IO_save_end= tmp; | |
77 | /* Swap _IO_read_base and _IO_save_base. */ | |
78 | tmp = fp->_wide_data->_IO_read_base; | |
79 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_save_base; | |
80 | fp->_wide_data->_IO_save_base = tmp; | |
81 | /* Set _IO_read_ptr. */ | |
82 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_base; | |
83 | } | |
84 | ||
85 | ||
86 | /* Switch current get area from main get area to (end of) backup area. */ | |
87 | void | |
88 | _IO_switch_to_wbackup_area (fp) | |
89 | _IO_FILE *fp; | |
90 | { | |
91 | wchar_t *tmp; | |
92 | fp->_flags |= _IO_IN_BACKUP; | |
93 | /* Swap _IO_read_end and _IO_save_end. */ | |
94 | tmp = fp->_wide_data->_IO_read_end; | |
95 | fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_save_end; | |
96 | fp->_wide_data->_IO_save_end = tmp; | |
97 | /* Swap _IO_read_base and _IO_save_base. */ | |
98 | tmp = fp->_wide_data->_IO_read_base; | |
99 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_save_base; | |
100 | fp->_wide_data->_IO_save_base = tmp; | |
101 | /* Set _IO_read_ptr. */ | |
102 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; | |
103 | } | |
104 | ||
105 | ||
106 | void | |
107 | _IO_wsetb (f, b, eb, a) | |
108 | _IO_FILE *f; | |
109 | wchar_t *b; | |
110 | wchar_t *eb; | |
111 | int a; | |
112 | { | |
113 | if (f->_wide_data->_IO_buf_base && !(f->_flags & _IO_USER_BUF)) | |
114 | FREE_BUF (f->_wide_data->_IO_buf_base, _IO_wblen (f)); | |
115 | f->_wide_data->_IO_buf_base = b; | |
116 | f->_wide_data->_IO_buf_end = eb; | |
117 | if (a) | |
118 | f->_flags &= ~_IO_USER_BUF; | |
119 | else | |
120 | f->_flags |= _IO_USER_BUF; | |
121 | } | |
122 | ||
123 | ||
124 | wint_t | |
125 | _IO_wdefault_pbackfail (fp, c) | |
126 | _IO_FILE *fp; | |
127 | wint_t c; | |
128 | { | |
129 | if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base | |
130 | && !_IO_in_backup (fp) | |
131 | && (wint_t) fp->_IO_read_ptr[-1] == c) | |
132 | --fp->_IO_read_ptr; | |
133 | else | |
134 | { | |
135 | /* Need to handle a filebuf in write mode (switch to read mode). FIXME!*/ | |
136 | if (!_IO_in_backup (fp)) | |
137 | { | |
138 | /* We need to keep the invariant that the main get area | |
139 | logically follows the backup area. */ | |
140 | if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base | |
141 | && _IO_have_wbackup (fp)) | |
142 | { | |
143 | if (save_for_wbackup (fp, fp->_wide_data->_IO_read_ptr)) | |
144 | return WEOF; | |
145 | } | |
146 | else if (!_IO_have_wbackup (fp)) | |
147 | { | |
148 | /* No backup buffer: allocate one. */ | |
149 | /* Use nshort buffer, if unused? (probably not) FIXME */ | |
150 | int backup_size = 128; | |
151 | wchar_t *bbuf = (wchar_t *) malloc (backup_size | |
152 | * sizeof (wchar_t)); | |
153 | if (bbuf == NULL) | |
154 | return WEOF; | |
155 | fp->_wide_data->_IO_save_base = bbuf; | |
156 | fp->_wide_data->_IO_save_end = (fp->_wide_data->_IO_save_base | |
157 | + backup_size); | |
158 | fp->_wide_data->_IO_backup_base = fp->_wide_data->_IO_save_end; | |
159 | } | |
160 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr; | |
161 | _IO_switch_to_wbackup_area (fp); | |
162 | } | |
163 | else if (fp->_wide_data->_IO_read_ptr <= fp->_wide_data->_IO_read_base) | |
164 | { | |
165 | /* Increase size of existing backup buffer. */ | |
166 | _IO_size_t new_size; | |
167 | _IO_size_t old_size = (fp->_wide_data->_IO_read_end | |
168 | - fp->_wide_data->_IO_read_base); | |
169 | wchar_t *new_buf; | |
170 | new_size = 2 * old_size; | |
171 | new_buf = (wchar_t *) malloc (new_size * sizeof (wchar_t)); | |
172 | if (new_buf == NULL) | |
173 | return WEOF; | |
174 | __wmemcpy (new_buf + (new_size - old_size), | |
175 | fp->_wide_data->_IO_read_base, old_size); | |
176 | free (fp->_wide_data->_IO_read_base); | |
177 | _IO_wsetg (fp, new_buf, new_buf + (new_size - old_size), | |
178 | new_buf + new_size); | |
179 | fp->_wide_data->_IO_backup_base = fp->_wide_data->_IO_read_ptr; | |
180 | } | |
181 | ||
182 | *--fp->_wide_data->_IO_read_ptr = c; | |
183 | } | |
184 | return c; | |
185 | } | |
186 | ||
187 | ||
188 | void | |
189 | _IO_wdefault_finish (fp, dummy) | |
190 | _IO_FILE *fp; | |
191 | int dummy; | |
192 | { | |
193 | struct _IO_marker *mark; | |
194 | if (fp->_wide_data->_IO_buf_base && !(fp->_flags & _IO_USER_BUF)) | |
195 | { | |
196 | FREE_BUF (fp->_wide_data->_IO_buf_base, | |
197 | _IO_wblen (fp) * sizeof (wchar_t)); | |
198 | fp->_wide_data->_IO_buf_base = fp->_wide_data->_IO_buf_end = NULL; | |
199 | } | |
200 | ||
201 | for (mark = fp->_markers; mark != NULL; mark = mark->_next) | |
202 | mark->_sbuf = NULL; | |
203 | ||
204 | if (fp->_IO_save_base) | |
205 | { | |
206 | free (fp->_wide_data->_IO_save_base); | |
207 | fp->_IO_save_base = NULL; | |
208 | } | |
209 | ||
210 | #ifdef _IO_MTSAFE_IO | |
211 | _IO_lock_fini (*fp->_lock); | |
212 | #endif | |
213 | ||
2ca8b1ee | 214 | _IO_un_link ((struct _IO_FILE_plus *) fp); |
d64b6ad0 UD |
215 | } |
216 | ||
217 | ||
218 | wint_t | |
219 | _IO_wdefault_uflow (fp) | |
220 | _IO_FILE *fp; | |
221 | { | |
222 | wint_t wch; | |
223 | wch = _IO_UNDERFLOW (fp); | |
224 | if (wch == WEOF) | |
225 | return WEOF; | |
226 | return *fp->_wide_data->_IO_read_ptr++; | |
227 | } | |
228 | ||
229 | ||
230 | wint_t | |
231 | __woverflow (f, wch) | |
232 | _IO_FILE *f; | |
233 | wint_t wch; | |
234 | { | |
235 | if (f->_mode == 0) | |
236 | _IO_fwide (f, 1); | |
237 | return _IO_OVERFLOW (f, wch); | |
238 | } | |
239 | ||
240 | ||
241 | wint_t | |
242 | __wuflow (fp) | |
243 | _IO_FILE *fp; | |
244 | { | |
245 | if (fp->_mode < 0 || (fp->_mode == 0 && _IO_fwide (fp, 1) != 1)) | |
655c0697 | 246 | return WEOF; |
d64b6ad0 UD |
247 | |
248 | if (fp->_mode == 0) | |
249 | _IO_fwide (fp, 1); | |
250 | if (_IO_in_put_mode (fp)) | |
655c0697 | 251 | if (_IO_switch_to_wget_mode (fp) == EOF) |
d64b6ad0 UD |
252 | return WEOF; |
253 | if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) | |
254 | return *fp->_wide_data->_IO_read_ptr++; | |
255 | if (_IO_in_backup (fp)) | |
256 | { | |
257 | _IO_switch_to_main_wget_area (fp); | |
258 | if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) | |
259 | return *fp->_wide_data->_IO_read_ptr++; | |
260 | } | |
261 | if (_IO_have_markers (fp)) | |
262 | { | |
263 | if (save_for_wbackup (fp, fp->_wide_data->_IO_read_end)) | |
264 | return WEOF; | |
265 | } | |
266 | else if (_IO_have_wbackup (fp)) | |
267 | _IO_free_wbackup_area (fp); | |
268 | return _IO_UFLOW (fp); | |
269 | } | |
270 | ||
271 | ||
272 | wint_t | |
273 | __wunderflow (fp) | |
274 | _IO_FILE *fp; | |
275 | { | |
276 | if (fp->_mode < 0 || (fp->_mode == 0 && _IO_fwide (fp, 1) != 1)) | |
655c0697 | 277 | return WEOF; |
d64b6ad0 | 278 | |
6f98fd7e UD |
279 | if (fp->_mode == 0) |
280 | _IO_fwide (fp, 1); | |
d64b6ad0 | 281 | if (_IO_in_put_mode (fp)) |
655c0697 | 282 | if (_IO_switch_to_wget_mode (fp) == EOF) |
d64b6ad0 UD |
283 | return WEOF; |
284 | if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) | |
285 | return *fp->_wide_data->_IO_read_ptr; | |
286 | if (_IO_in_backup (fp)) | |
287 | { | |
288 | _IO_switch_to_main_wget_area (fp); | |
289 | if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) | |
290 | return *fp->_wide_data->_IO_read_ptr; | |
291 | } | |
292 | if (_IO_have_markers (fp)) | |
293 | { | |
294 | if (save_for_wbackup (fp, fp->_wide_data->_IO_read_end)) | |
655c0697 | 295 | return WEOF; |
d64b6ad0 UD |
296 | } |
297 | else if (_IO_have_backup (fp)) | |
298 | _IO_free_wbackup_area (fp); | |
299 | return _IO_UNDERFLOW (fp); | |
300 | } | |
301 | ||
302 | ||
303 | _IO_size_t | |
304 | _IO_wdefault_xsputn (f, data, n) | |
305 | _IO_FILE *f; | |
306 | const void *data; | |
307 | _IO_size_t n; | |
308 | { | |
309 | const wchar_t *s = (const wchar_t *) data; | |
310 | _IO_size_t more = n; | |
311 | if (more <= 0) | |
312 | return 0; | |
313 | for (;;) | |
314 | { | |
315 | /* Space available. */ | |
316 | _IO_ssize_t count = (f->_wide_data->_IO_write_end | |
317 | - f->_wide_data->_IO_write_ptr); | |
318 | if (count > 0) | |
319 | { | |
320 | if ((_IO_size_t) count > more) | |
321 | count = more; | |
322 | if (count > 20) | |
323 | { | |
324 | #ifdef _LIBC | |
325 | f->_wide_data->_IO_write_ptr = | |
326 | __wmempcpy (f->_wide_data->_IO_write_ptr, s, count); | |
327 | #else | |
328 | memcpy (f->_wide_data->_IO_write_ptr, s, count); | |
329 | f->_wide_data->_IO_write_ptr += count; | |
330 | #endif | |
331 | s += count; | |
332 | } | |
333 | else if (count <= 0) | |
334 | count = 0; | |
335 | else | |
336 | { | |
337 | wchar_t *p = f->_wide_data->_IO_write_ptr; | |
338 | _IO_ssize_t i; | |
339 | for (i = count; --i >= 0; ) | |
340 | *p++ = *s++; | |
341 | f->_wide_data->_IO_write_ptr = p; | |
342 | } | |
343 | more -= count; | |
344 | } | |
345 | if (more == 0 || __woverflow (f, *s++) == WEOF) | |
346 | break; | |
347 | more--; | |
348 | } | |
349 | return n - more; | |
350 | } | |
351 | ||
352 | ||
353 | _IO_size_t | |
354 | _IO_wdefault_xsgetn (fp, data, n) | |
355 | _IO_FILE *fp; | |
356 | void *data; | |
357 | _IO_size_t n; | |
358 | { | |
359 | _IO_size_t more = n; | |
360 | wchar_t *s = (wchar_t*) data; | |
361 | for (;;) | |
362 | { | |
363 | /* Data available. */ | |
364 | _IO_ssize_t count = (fp->_wide_data->_IO_read_end | |
365 | - fp->_wide_data->_IO_read_ptr); | |
366 | if (count > 0) | |
367 | { | |
368 | if ((_IO_size_t) count > more) | |
369 | count = more; | |
370 | if (count > 20) | |
371 | { | |
372 | #ifdef _LIBC | |
373 | s = __wmempcpy (s, fp->_wide_data->_IO_read_ptr, count); | |
374 | #else | |
375 | memcpy (s, fp->_wide_data->_IO_read_ptr, count); | |
376 | s += count; | |
377 | #endif | |
378 | fp->_wide_data->_IO_read_ptr += count; | |
379 | } | |
380 | else if (count <= 0) | |
381 | count = 0; | |
382 | else | |
383 | { | |
384 | wchar_t *p = fp->_wide_data->_IO_read_ptr; | |
385 | int i = (int) count; | |
386 | while (--i >= 0) | |
387 | *s++ = *p++; | |
388 | fp->_wide_data->_IO_read_ptr = p; | |
389 | } | |
390 | more -= count; | |
391 | } | |
392 | if (more == 0 || __wunderflow (fp) == WEOF) | |
393 | break; | |
394 | } | |
395 | return n - more; | |
396 | } | |
397 | ||
398 | ||
399 | void | |
400 | _IO_wdoallocbuf (fp) | |
401 | _IO_FILE *fp; | |
402 | { | |
403 | if (fp->_wide_data->_IO_buf_base) | |
404 | return; | |
405 | if (!(fp->_flags & _IO_UNBUFFERED)) | |
1dc72e4f | 406 | if ((wint_t)_IO_WDOALLOCATE (fp) != WEOF) |
d64b6ad0 UD |
407 | return; |
408 | _IO_wsetb (fp, fp->_wide_data->_shortbuf, fp->_wide_data->_shortbuf + 1, 0); | |
409 | } | |
410 | ||
411 | ||
412 | _IO_FILE * | |
413 | _IO_wdefault_setbuf (fp, p, len) | |
414 | _IO_FILE *fp; | |
415 | wchar_t *p; | |
416 | _IO_ssize_t len; | |
417 | { | |
418 | if (_IO_SYNC (fp) == EOF) | |
419 | return NULL; | |
420 | if (p == NULL || len == 0) | |
421 | { | |
422 | fp->_flags |= _IO_UNBUFFERED; | |
423 | _IO_wsetb (fp, fp->_wide_data->_shortbuf, fp->_wide_data->_shortbuf + 1, | |
424 | 0); | |
425 | } | |
426 | else | |
427 | { | |
428 | fp->_flags &= ~_IO_UNBUFFERED; | |
429 | _IO_wsetb (fp, p, p + len, 0); | |
430 | } | |
431 | fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr | |
432 | = fp->_wide_data->_IO_write_end = 0; | |
433 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr | |
434 | = fp->_wide_data->_IO_read_end = 0; | |
435 | return fp; | |
436 | } | |
437 | ||
438 | ||
439 | int | |
440 | _IO_wdefault_doallocate (fp) | |
441 | _IO_FILE *fp; | |
442 | { | |
443 | wchar_t *buf; | |
444 | ||
445 | ALLOC_WBUF (buf, _IO_BUFSIZ, EOF); | |
446 | _IO_wsetb (fp, buf, buf + _IO_BUFSIZ, 1); | |
447 | return 1; | |
448 | } | |
449 | ||
450 | ||
451 | int | |
452 | _IO_switch_to_wget_mode (fp) | |
453 | _IO_FILE *fp; | |
454 | { | |
455 | if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_write_base) | |
1dc72e4f | 456 | if ((wint_t)_IO_WOVERFLOW (fp, WEOF) == WEOF) |
d64b6ad0 UD |
457 | return EOF; |
458 | if (_IO_in_backup (fp)) | |
459 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_backup_base; | |
460 | else | |
461 | { | |
462 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_buf_base; | |
463 | if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_read_end) | |
464 | fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_write_ptr; | |
465 | } | |
466 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_write_ptr; | |
467 | ||
468 | fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr | |
469 | = fp->_wide_data->_IO_write_end = fp->_wide_data->_IO_read_ptr; | |
470 | ||
471 | fp->_flags &= ~_IO_CURRENTLY_PUTTING; | |
472 | return 0; | |
473 | } | |
474 | ||
475 | void | |
476 | _IO_free_wbackup_area (fp) | |
477 | _IO_FILE *fp; | |
478 | { | |
479 | if (_IO_in_backup (fp)) | |
480 | _IO_switch_to_main_wget_area (fp); /* Just in case. */ | |
481 | free (fp->_wide_data->_IO_save_base); | |
482 | fp->_wide_data->_IO_save_base = NULL; | |
483 | fp->_wide_data->_IO_save_end = NULL; | |
484 | fp->_wide_data->_IO_backup_base = NULL; | |
485 | } | |
486 | ||
487 | #if 0 | |
488 | int | |
489 | _IO_switch_to_wput_mode (fp) | |
490 | _IO_FILE *fp; | |
491 | { | |
492 | fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_read_ptr; | |
493 | fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_read_ptr; | |
494 | /* Following is wrong if line- or un-buffered? */ | |
495 | fp->_wide_data->_IO_write_end = (fp->_flags & _IO_IN_BACKUP | |
496 | ? fp->_wide_data->_IO_read_end | |
497 | : fp->_wide_data->_IO_buf_end); | |
498 | ||
499 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; | |
500 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_end; | |
501 | ||
502 | fp->_flags |= _IO_CURRENTLY_PUTTING; | |
503 | return 0; | |
504 | } | |
505 | #endif | |
506 | ||
507 | ||
508 | static int | |
509 | #ifdef _LIBC | |
510 | internal_function | |
511 | #endif | |
512 | save_for_wbackup (fp, end_p) | |
513 | _IO_FILE *fp; | |
514 | wchar_t *end_p; | |
515 | { | |
516 | /* Append [_IO_read_base..end_p] to backup area. */ | |
517 | _IO_ssize_t least_mark = _IO_least_wmarker (fp, end_p); | |
518 | /* needed_size is how much space we need in the backup area. */ | |
519 | _IO_size_t needed_size = ((end_p - fp->_wide_data->_IO_read_base) | |
520 | - least_mark); | |
521 | /* FIXME: Dubious arithmetic if pointers are NULL */ | |
522 | _IO_size_t current_Bsize = (fp->_wide_data->_IO_save_end | |
523 | - fp->_wide_data->_IO_save_base); | |
524 | _IO_size_t avail; /* Extra space available for future expansion. */ | |
525 | _IO_ssize_t delta; | |
526 | struct _IO_marker *mark; | |
527 | if (needed_size > current_Bsize) | |
528 | { | |
529 | wchar_t *new_buffer; | |
530 | avail = 100; | |
531 | new_buffer = (wchar_t *) malloc ((avail + needed_size) | |
532 | * sizeof (wchar_t)); | |
533 | if (new_buffer == NULL) | |
534 | return EOF; /* FIXME */ | |
535 | if (least_mark < 0) | |
536 | { | |
537 | #ifdef _LIBC | |
538 | __wmempcpy (__wmempcpy (new_buffer + avail, | |
539 | fp->_wide_data->_IO_save_end + least_mark, | |
540 | -least_mark), | |
541 | fp->_wide_data->_IO_read_base, | |
542 | end_p - fp->_wide_data->_IO_read_base); | |
543 | #else | |
544 | memcpy (new_buffer + avail, | |
545 | fp->_wide_data->_IO_save_end + least_mark, | |
546 | -least_mark * sizeof (wchar_t)); | |
547 | memcpy (new_buffer + avail - least_mark, | |
548 | fp->_wide_data->_IO_read_base, | |
549 | (end_p - fp->_wide_data->_IO_read_base) * sizeof (wchar_t)); | |
550 | #endif | |
551 | } | |
552 | else | |
553 | { | |
554 | #ifdef _LIBC | |
555 | __wmemcpy (new_buffer + avail, | |
556 | fp->_wide_data->_IO_read_base + least_mark, | |
557 | needed_size); | |
558 | #else | |
559 | memcpy (new_buffer + avail, | |
560 | fp->_wide_data->_IO_read_base + least_mark, | |
561 | needed_size * sizeof (wchar_t)); | |
562 | #endif | |
563 | } | |
564 | if (fp->_wide_data->_IO_save_base) | |
565 | free (fp->_wide_data->_IO_save_base); | |
566 | fp->_wide_data->_IO_save_base = new_buffer; | |
567 | fp->_wide_data->_IO_save_end = new_buffer + avail + needed_size; | |
568 | } | |
569 | else | |
570 | { | |
571 | avail = current_Bsize - needed_size; | |
572 | if (least_mark < 0) | |
573 | { | |
574 | #ifdef _LIBC | |
575 | __wmemmove (fp->_wide_data->_IO_save_base + avail, | |
576 | fp->_wide_data->_IO_save_end + least_mark, | |
577 | -least_mark); | |
578 | __wmemcpy (fp->_wide_data->_IO_save_base + avail - least_mark, | |
579 | fp->_wide_data->_IO_read_base, | |
580 | end_p - fp->_wide_data->_IO_read_base); | |
581 | #else | |
582 | memmove (fp->_wide_data->_IO_save_base + avail, | |
583 | fp->_wide_data->_IO_save_end + least_mark, | |
584 | -least_mark * sizeof (wchar_t)); | |
585 | memcpy (fp->_wide_data->_IO_save_base + avail - least_mark, | |
586 | fp->_wide_data->_IO_read_base, | |
587 | (end_p - fp->_wide_data->_IO_read_base) * sizeof (wchar_t)); | |
588 | #endif | |
589 | } | |
590 | else if (needed_size > 0) | |
591 | #ifdef _LIBC | |
592 | __wmemcpy (fp->_wide_data->_IO_save_base + avail, | |
593 | fp->_wide_data->_IO_read_base + least_mark, | |
594 | needed_size); | |
595 | #else | |
596 | memcpy (fp->_wide_data->_IO_save_base + avail, | |
597 | fp->_wide_data->_IO_read_base + least_mark, | |
598 | needed_size * sizeof (wchar_t)); | |
599 | #endif | |
600 | } | |
601 | fp->_wide_data->_IO_backup_base = fp->_wide_data->_IO_save_base + avail; | |
602 | /* Adjust all the streammarkers. */ | |
603 | delta = end_p - fp->_wide_data->_IO_read_base; | |
604 | for (mark = fp->_markers; mark != NULL; mark = mark->_next) | |
605 | mark->_pos -= delta; | |
606 | return 0; | |
607 | } | |
608 | ||
609 | wint_t | |
610 | _IO_sputbackwc (fp, c) | |
611 | _IO_FILE *fp; | |
612 | wint_t c; | |
613 | { | |
614 | wint_t result; | |
615 | ||
616 | if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base | |
617 | && (wchar_t)fp->_wide_data->_IO_read_ptr[-1] == (wchar_t) c) | |
618 | { | |
619 | fp->_wide_data->_IO_read_ptr--; | |
620 | result = c; | |
621 | } | |
622 | else | |
623 | result = _IO_PBACKFAIL (fp, c); | |
624 | ||
1dc72e4f | 625 | if (result != WEOF) |
d64b6ad0 UD |
626 | fp->_flags &= ~_IO_EOF_SEEN; |
627 | ||
628 | return result; | |
629 | } | |
630 | ||
631 | wint_t | |
632 | _IO_sungetwc (fp) | |
633 | _IO_FILE *fp; | |
634 | { | |
1dc72e4f | 635 | wint_t result; |
d64b6ad0 UD |
636 | |
637 | if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base) | |
638 | { | |
639 | fp->_wide_data->_IO_read_ptr--; | |
640 | result = *fp->_wide_data->_IO_read_ptr; | |
641 | } | |
642 | else | |
643 | result = _IO_PBACKFAIL (fp, EOF); | |
644 | ||
645 | if (result != WEOF) | |
646 | fp->_flags &= ~_IO_EOF_SEEN; | |
647 | ||
648 | return result; | |
649 | } | |
650 | ||
651 | ||
652 | unsigned | |
653 | _IO_adjust_wcolumn (start, line, count) | |
654 | unsigned start; | |
655 | const wchar_t *line; | |
656 | int count; | |
657 | { | |
658 | const wchar_t *ptr = line + count; | |
659 | while (ptr > line) | |
660 | if (*--ptr == L'\n') | |
661 | return line + count - ptr - 1; | |
662 | return start + count; | |
663 | } | |
664 | ||
665 | void | |
666 | _IO_init_wmarker (marker, fp) | |
667 | struct _IO_marker *marker; | |
668 | _IO_FILE *fp; | |
669 | { | |
670 | marker->_sbuf = fp; | |
671 | if (_IO_in_put_mode (fp)) | |
655c0697 | 672 | _IO_switch_to_wget_mode (fp); |
d64b6ad0 UD |
673 | if (_IO_in_backup (fp)) |
674 | marker->_pos = fp->_wide_data->_IO_read_ptr - fp->_wide_data->_IO_read_end; | |
675 | else | |
676 | marker->_pos = (fp->_wide_data->_IO_read_ptr | |
677 | - fp->_wide_data->_IO_read_base); | |
678 | ||
679 | /* Should perhaps sort the chain? */ | |
680 | marker->_next = fp->_markers; | |
681 | fp->_markers = marker; | |
682 | } | |
683 | ||
684 | #define BAD_DELTA EOF | |
685 | ||
686 | /* Return difference between MARK and current position of MARK's stream. */ | |
687 | int | |
688 | _IO_wmarker_delta (mark) | |
689 | struct _IO_marker *mark; | |
690 | { | |
691 | int cur_pos; | |
692 | if (mark->_sbuf == NULL) | |
693 | return BAD_DELTA; | |
694 | if (_IO_in_backup (mark->_sbuf)) | |
695 | cur_pos = (mark->_sbuf->_wide_data->_IO_read_ptr | |
696 | - mark->_sbuf->_wide_data->_IO_read_end); | |
697 | else | |
698 | cur_pos = (mark->_sbuf->_wide_data->_IO_read_ptr | |
699 | - mark->_sbuf->_wide_data->_IO_read_base); | |
700 | return mark->_pos - cur_pos; | |
701 | } | |
702 | ||
703 | int | |
704 | _IO_seekwmark (fp, mark, delta) | |
705 | _IO_FILE *fp; | |
706 | struct _IO_marker *mark; | |
707 | int delta; | |
708 | { | |
709 | if (mark->_sbuf != fp) | |
710 | return EOF; | |
711 | if (mark->_pos >= 0) | |
712 | { | |
713 | if (_IO_in_backup (fp)) | |
714 | _IO_switch_to_main_wget_area (fp); | |
715 | fp->_wide_data->_IO_read_ptr = (fp->_wide_data->_IO_read_base | |
716 | + mark->_pos); | |
717 | } | |
718 | else | |
719 | { | |
720 | if (!_IO_in_backup (fp)) | |
721 | _IO_switch_to_wbackup_area (fp); | |
722 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end + mark->_pos; | |
723 | } | |
724 | return 0; | |
725 | } | |
726 | ||
727 | void | |
728 | _IO_unsave_wmarkers (fp) | |
729 | _IO_FILE *fp; | |
730 | { | |
731 | struct _IO_marker *mark = fp->_markers; | |
732 | if (mark) | |
733 | { | |
734 | #ifdef TODO | |
735 | streampos offset = seekoff (0, ios::cur, ios::in); | |
736 | if (offset != EOF) | |
737 | { | |
738 | offset += eGptr () - Gbase (); | |
739 | for ( ; mark != NULL; mark = mark->_next) | |
740 | mark->set_streampos (mark->_pos + offset); | |
741 | } | |
742 | else | |
743 | { | |
744 | for ( ; mark != NULL; mark = mark->_next) | |
745 | mark->set_streampos (EOF); | |
746 | } | |
747 | #endif | |
748 | fp->_markers = 0; | |
749 | } | |
750 | ||
751 | if (_IO_have_backup (fp)) | |
752 | _IO_free_wbackup_area (fp); | |
753 | } |