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