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79937577 | 1 | /* Copyright (C) 1993,1995,1997-2001,2002,2004 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
d64b6ad0 UD |
3 | Written by Ulrich Drepper <drepper@cygnus.com>. |
4 | Based on the single byte version by Per Bothner <bothner@cygnus.com>. | |
5 | ||
41bdb6e2 AJ |
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. | |
d64b6ad0 | 10 | |
41bdb6e2 AJ |
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 | |
d64b6ad0 | 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 AJ |
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 | As a special exception, if you link the code in this file with | |
22 | files compiled with a GNU compiler to produce an executable, | |
23 | that does not cause the resulting executable to be covered by | |
24 | the GNU Lesser General Public License. This exception does not | |
25 | however invalidate any other reasons why the executable file | |
26 | might be covered by the GNU Lesser General Public License. | |
27 | This exception applies to code released by its copyright holders | |
28 | in files containing the exception. */ | |
d64b6ad0 UD |
29 | |
30 | /* Generic or default I/O operations. */ | |
31 | ||
32 | #include "libioP.h" | |
33 | #ifdef __STDC__ | |
34 | #include <stdlib.h> | |
35 | #endif | |
36 | #include <string.h> | |
37 | #include <wchar.h> | |
38 | ||
39 | ||
319d719d UD |
40 | #ifndef _LIBC |
41 | # define __wmemcpy(dst, src, n) wmemcpy (dst, src, n) | |
42 | #endif | |
43 | ||
d64b6ad0 | 44 | |
79937577 | 45 | static int save_for_wbackup (_IO_FILE *fp, wchar_t *end_p) __THROW |
d64b6ad0 UD |
46 | #ifdef _LIBC |
47 | internal_function | |
48 | #endif | |
49 | ; | |
50 | ||
51 | /* Return minimum _pos markers | |
52 | Assumes the current get area is the main get area. */ | |
79937577 | 53 | _IO_ssize_t _IO_least_wmarker (_IO_FILE *fp, wchar_t *end_p) __THROW; |
d64b6ad0 UD |
54 | |
55 | _IO_ssize_t | |
56 | _IO_least_wmarker (fp, end_p) | |
57 | _IO_FILE *fp; | |
58 | wchar_t *end_p; | |
59 | { | |
60 | _IO_ssize_t least_so_far = end_p - fp->_wide_data->_IO_read_base; | |
61 | struct _IO_marker *mark; | |
62 | for (mark = fp->_markers; mark != NULL; mark = mark->_next) | |
63 | if (mark->_pos < least_so_far) | |
64 | least_so_far = mark->_pos; | |
65 | return least_so_far; | |
66 | } | |
77fe0b9c | 67 | INTDEF(_IO_least_wmarker) |
d64b6ad0 UD |
68 | |
69 | /* Switch current get area from backup buffer to (start of) main get area. */ | |
70 | void | |
71 | _IO_switch_to_main_wget_area (fp) | |
72 | _IO_FILE *fp; | |
73 | { | |
74 | wchar_t *tmp; | |
75 | fp->_flags &= ~_IO_IN_BACKUP; | |
76 | /* Swap _IO_read_end and _IO_save_end. */ | |
77 | tmp = fp->_wide_data->_IO_read_end; | |
78 | fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_save_end; | |
79 | fp->_wide_data->_IO_save_end= tmp; | |
80 | /* Swap _IO_read_base and _IO_save_base. */ | |
81 | tmp = fp->_wide_data->_IO_read_base; | |
82 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_save_base; | |
83 | fp->_wide_data->_IO_save_base = tmp; | |
84 | /* Set _IO_read_ptr. */ | |
85 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_base; | |
86 | } | |
77fe0b9c | 87 | INTDEF(_IO_switch_to_main_wget_area) |
d64b6ad0 UD |
88 | |
89 | ||
90 | /* Switch current get area from main get area to (end of) backup area. */ | |
91 | void | |
92 | _IO_switch_to_wbackup_area (fp) | |
93 | _IO_FILE *fp; | |
94 | { | |
95 | wchar_t *tmp; | |
96 | fp->_flags |= _IO_IN_BACKUP; | |
97 | /* Swap _IO_read_end and _IO_save_end. */ | |
98 | tmp = fp->_wide_data->_IO_read_end; | |
99 | fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_save_end; | |
100 | fp->_wide_data->_IO_save_end = tmp; | |
101 | /* Swap _IO_read_base and _IO_save_base. */ | |
102 | tmp = fp->_wide_data->_IO_read_base; | |
103 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_save_base; | |
104 | fp->_wide_data->_IO_save_base = tmp; | |
105 | /* Set _IO_read_ptr. */ | |
106 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; | |
107 | } | |
77fe0b9c | 108 | INTDEF(_IO_switch_to_wbackup_area) |
d64b6ad0 UD |
109 | |
110 | ||
111 | void | |
112 | _IO_wsetb (f, b, eb, a) | |
113 | _IO_FILE *f; | |
114 | wchar_t *b; | |
115 | wchar_t *eb; | |
116 | int a; | |
117 | { | |
118 | if (f->_wide_data->_IO_buf_base && !(f->_flags & _IO_USER_BUF)) | |
119 | FREE_BUF (f->_wide_data->_IO_buf_base, _IO_wblen (f)); | |
120 | f->_wide_data->_IO_buf_base = b; | |
121 | f->_wide_data->_IO_buf_end = eb; | |
122 | if (a) | |
123 | f->_flags &= ~_IO_USER_BUF; | |
124 | else | |
125 | f->_flags |= _IO_USER_BUF; | |
126 | } | |
77fe0b9c | 127 | INTDEF(_IO_wsetb) |
d64b6ad0 UD |
128 | |
129 | ||
130 | wint_t | |
131 | _IO_wdefault_pbackfail (fp, c) | |
132 | _IO_FILE *fp; | |
133 | wint_t c; | |
134 | { | |
135 | if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base | |
136 | && !_IO_in_backup (fp) | |
137 | && (wint_t) fp->_IO_read_ptr[-1] == c) | |
138 | --fp->_IO_read_ptr; | |
139 | else | |
140 | { | |
141 | /* Need to handle a filebuf in write mode (switch to read mode). FIXME!*/ | |
142 | if (!_IO_in_backup (fp)) | |
143 | { | |
144 | /* We need to keep the invariant that the main get area | |
145 | logically follows the backup area. */ | |
146 | if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base | |
147 | && _IO_have_wbackup (fp)) | |
148 | { | |
149 | if (save_for_wbackup (fp, fp->_wide_data->_IO_read_ptr)) | |
150 | return WEOF; | |
151 | } | |
152 | else if (!_IO_have_wbackup (fp)) | |
153 | { | |
154 | /* No backup buffer: allocate one. */ | |
155 | /* Use nshort buffer, if unused? (probably not) FIXME */ | |
156 | int backup_size = 128; | |
157 | wchar_t *bbuf = (wchar_t *) malloc (backup_size | |
158 | * sizeof (wchar_t)); | |
159 | if (bbuf == NULL) | |
160 | return WEOF; | |
161 | fp->_wide_data->_IO_save_base = bbuf; | |
162 | fp->_wide_data->_IO_save_end = (fp->_wide_data->_IO_save_base | |
163 | + backup_size); | |
164 | fp->_wide_data->_IO_backup_base = fp->_wide_data->_IO_save_end; | |
165 | } | |
166 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_ptr; | |
77fe0b9c | 167 | INTUSE(_IO_switch_to_wbackup_area) (fp); |
d64b6ad0 UD |
168 | } |
169 | else if (fp->_wide_data->_IO_read_ptr <= fp->_wide_data->_IO_read_base) | |
170 | { | |
171 | /* Increase size of existing backup buffer. */ | |
172 | _IO_size_t new_size; | |
173 | _IO_size_t old_size = (fp->_wide_data->_IO_read_end | |
174 | - fp->_wide_data->_IO_read_base); | |
175 | wchar_t *new_buf; | |
176 | new_size = 2 * old_size; | |
177 | new_buf = (wchar_t *) malloc (new_size * sizeof (wchar_t)); | |
178 | if (new_buf == NULL) | |
179 | return WEOF; | |
180 | __wmemcpy (new_buf + (new_size - old_size), | |
181 | fp->_wide_data->_IO_read_base, old_size); | |
182 | free (fp->_wide_data->_IO_read_base); | |
183 | _IO_wsetg (fp, new_buf, new_buf + (new_size - old_size), | |
184 | new_buf + new_size); | |
185 | fp->_wide_data->_IO_backup_base = fp->_wide_data->_IO_read_ptr; | |
186 | } | |
187 | ||
188 | *--fp->_wide_data->_IO_read_ptr = c; | |
189 | } | |
190 | return c; | |
191 | } | |
77fe0b9c | 192 | INTDEF(_IO_wdefault_pbackfail) |
d64b6ad0 UD |
193 | |
194 | ||
195 | void | |
196 | _IO_wdefault_finish (fp, dummy) | |
197 | _IO_FILE *fp; | |
198 | int dummy; | |
199 | { | |
200 | struct _IO_marker *mark; | |
201 | if (fp->_wide_data->_IO_buf_base && !(fp->_flags & _IO_USER_BUF)) | |
202 | { | |
203 | FREE_BUF (fp->_wide_data->_IO_buf_base, | |
204 | _IO_wblen (fp) * sizeof (wchar_t)); | |
205 | fp->_wide_data->_IO_buf_base = fp->_wide_data->_IO_buf_end = NULL; | |
206 | } | |
207 | ||
208 | for (mark = fp->_markers; mark != NULL; mark = mark->_next) | |
209 | mark->_sbuf = NULL; | |
210 | ||
211 | if (fp->_IO_save_base) | |
212 | { | |
213 | free (fp->_wide_data->_IO_save_base); | |
214 | fp->_IO_save_base = NULL; | |
215 | } | |
216 | ||
217 | #ifdef _IO_MTSAFE_IO | |
c020d48c UD |
218 | if (fp->_lock != NULL) |
219 | _IO_lock_fini (*fp->_lock); | |
d64b6ad0 UD |
220 | #endif |
221 | ||
77fe0b9c | 222 | INTUSE(_IO_un_link) ((struct _IO_FILE_plus *) fp); |
d64b6ad0 | 223 | } |
77fe0b9c | 224 | INTDEF(_IO_wdefault_finish) |
d64b6ad0 UD |
225 | |
226 | ||
227 | wint_t | |
228 | _IO_wdefault_uflow (fp) | |
229 | _IO_FILE *fp; | |
230 | { | |
231 | wint_t wch; | |
232 | wch = _IO_UNDERFLOW (fp); | |
233 | if (wch == WEOF) | |
234 | return WEOF; | |
235 | return *fp->_wide_data->_IO_read_ptr++; | |
236 | } | |
77fe0b9c | 237 | INTDEF(_IO_wdefault_uflow) |
d64b6ad0 UD |
238 | |
239 | ||
240 | wint_t | |
241 | __woverflow (f, wch) | |
242 | _IO_FILE *f; | |
243 | wint_t wch; | |
244 | { | |
245 | if (f->_mode == 0) | |
246 | _IO_fwide (f, 1); | |
247 | return _IO_OVERFLOW (f, wch); | |
248 | } | |
37ba7d66 | 249 | libc_hidden_def (__woverflow) |
d64b6ad0 UD |
250 | |
251 | ||
252 | wint_t | |
253 | __wuflow (fp) | |
254 | _IO_FILE *fp; | |
255 | { | |
256 | if (fp->_mode < 0 || (fp->_mode == 0 && _IO_fwide (fp, 1) != 1)) | |
655c0697 | 257 | return WEOF; |
d64b6ad0 UD |
258 | |
259 | if (fp->_mode == 0) | |
260 | _IO_fwide (fp, 1); | |
261 | if (_IO_in_put_mode (fp)) | |
77fe0b9c | 262 | if (INTUSE(_IO_switch_to_wget_mode) (fp) == EOF) |
d64b6ad0 UD |
263 | return WEOF; |
264 | if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) | |
265 | return *fp->_wide_data->_IO_read_ptr++; | |
266 | if (_IO_in_backup (fp)) | |
267 | { | |
77fe0b9c | 268 | INTUSE(_IO_switch_to_main_wget_area) (fp); |
d64b6ad0 UD |
269 | if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) |
270 | return *fp->_wide_data->_IO_read_ptr++; | |
271 | } | |
272 | if (_IO_have_markers (fp)) | |
273 | { | |
274 | if (save_for_wbackup (fp, fp->_wide_data->_IO_read_end)) | |
275 | return WEOF; | |
276 | } | |
277 | else if (_IO_have_wbackup (fp)) | |
77fe0b9c | 278 | INTUSE(_IO_free_wbackup_area) (fp); |
d64b6ad0 UD |
279 | return _IO_UFLOW (fp); |
280 | } | |
a20d8dbe | 281 | libc_hidden_def (__wuflow) |
d64b6ad0 UD |
282 | |
283 | wint_t | |
284 | __wunderflow (fp) | |
285 | _IO_FILE *fp; | |
286 | { | |
287 | if (fp->_mode < 0 || (fp->_mode == 0 && _IO_fwide (fp, 1) != 1)) | |
655c0697 | 288 | return WEOF; |
d64b6ad0 | 289 | |
6f98fd7e UD |
290 | if (fp->_mode == 0) |
291 | _IO_fwide (fp, 1); | |
d64b6ad0 | 292 | if (_IO_in_put_mode (fp)) |
77fe0b9c | 293 | if (INTUSE(_IO_switch_to_wget_mode) (fp) == EOF) |
d64b6ad0 UD |
294 | return WEOF; |
295 | if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) | |
296 | return *fp->_wide_data->_IO_read_ptr; | |
297 | if (_IO_in_backup (fp)) | |
298 | { | |
77fe0b9c | 299 | INTUSE(_IO_switch_to_main_wget_area) (fp); |
d64b6ad0 UD |
300 | if (fp->_wide_data->_IO_read_ptr < fp->_wide_data->_IO_read_end) |
301 | return *fp->_wide_data->_IO_read_ptr; | |
302 | } | |
303 | if (_IO_have_markers (fp)) | |
304 | { | |
305 | if (save_for_wbackup (fp, fp->_wide_data->_IO_read_end)) | |
655c0697 | 306 | return WEOF; |
d64b6ad0 UD |
307 | } |
308 | else if (_IO_have_backup (fp)) | |
77fe0b9c | 309 | INTUSE(_IO_free_wbackup_area) (fp); |
d64b6ad0 UD |
310 | return _IO_UNDERFLOW (fp); |
311 | } | |
a20d8dbe | 312 | libc_hidden_def (__wunderflow) |
d64b6ad0 UD |
313 | |
314 | ||
315 | _IO_size_t | |
316 | _IO_wdefault_xsputn (f, data, n) | |
317 | _IO_FILE *f; | |
318 | const void *data; | |
319 | _IO_size_t n; | |
320 | { | |
321 | const wchar_t *s = (const wchar_t *) data; | |
322 | _IO_size_t more = n; | |
323 | if (more <= 0) | |
324 | return 0; | |
325 | for (;;) | |
326 | { | |
327 | /* Space available. */ | |
328 | _IO_ssize_t count = (f->_wide_data->_IO_write_end | |
329 | - f->_wide_data->_IO_write_ptr); | |
330 | if (count > 0) | |
331 | { | |
332 | if ((_IO_size_t) count > more) | |
333 | count = more; | |
334 | if (count > 20) | |
335 | { | |
336 | #ifdef _LIBC | |
337 | f->_wide_data->_IO_write_ptr = | |
338 | __wmempcpy (f->_wide_data->_IO_write_ptr, s, count); | |
339 | #else | |
340 | memcpy (f->_wide_data->_IO_write_ptr, s, count); | |
341 | f->_wide_data->_IO_write_ptr += count; | |
342 | #endif | |
343 | s += count; | |
344 | } | |
345 | else if (count <= 0) | |
346 | count = 0; | |
347 | else | |
348 | { | |
349 | wchar_t *p = f->_wide_data->_IO_write_ptr; | |
350 | _IO_ssize_t i; | |
351 | for (i = count; --i >= 0; ) | |
352 | *p++ = *s++; | |
353 | f->_wide_data->_IO_write_ptr = p; | |
354 | } | |
355 | more -= count; | |
356 | } | |
357 | if (more == 0 || __woverflow (f, *s++) == WEOF) | |
358 | break; | |
359 | more--; | |
360 | } | |
361 | return n - more; | |
362 | } | |
77fe0b9c | 363 | INTDEF(_IO_wdefault_xsputn) |
d64b6ad0 UD |
364 | |
365 | ||
366 | _IO_size_t | |
367 | _IO_wdefault_xsgetn (fp, data, n) | |
368 | _IO_FILE *fp; | |
369 | void *data; | |
370 | _IO_size_t n; | |
371 | { | |
372 | _IO_size_t more = n; | |
373 | wchar_t *s = (wchar_t*) data; | |
374 | for (;;) | |
375 | { | |
376 | /* Data available. */ | |
377 | _IO_ssize_t count = (fp->_wide_data->_IO_read_end | |
378 | - fp->_wide_data->_IO_read_ptr); | |
379 | if (count > 0) | |
380 | { | |
381 | if ((_IO_size_t) count > more) | |
382 | count = more; | |
383 | if (count > 20) | |
384 | { | |
385 | #ifdef _LIBC | |
386 | s = __wmempcpy (s, fp->_wide_data->_IO_read_ptr, count); | |
387 | #else | |
388 | memcpy (s, fp->_wide_data->_IO_read_ptr, count); | |
389 | s += count; | |
390 | #endif | |
391 | fp->_wide_data->_IO_read_ptr += count; | |
392 | } | |
393 | else if (count <= 0) | |
394 | count = 0; | |
395 | else | |
396 | { | |
397 | wchar_t *p = fp->_wide_data->_IO_read_ptr; | |
398 | int i = (int) count; | |
399 | while (--i >= 0) | |
400 | *s++ = *p++; | |
401 | fp->_wide_data->_IO_read_ptr = p; | |
402 | } | |
403 | more -= count; | |
404 | } | |
405 | if (more == 0 || __wunderflow (fp) == WEOF) | |
406 | break; | |
407 | } | |
408 | return n - more; | |
409 | } | |
77fe0b9c | 410 | INTDEF(_IO_wdefault_xsgetn) |
d64b6ad0 UD |
411 | |
412 | ||
413 | void | |
414 | _IO_wdoallocbuf (fp) | |
415 | _IO_FILE *fp; | |
416 | { | |
417 | if (fp->_wide_data->_IO_buf_base) | |
418 | return; | |
419 | if (!(fp->_flags & _IO_UNBUFFERED)) | |
1dc72e4f | 420 | if ((wint_t)_IO_WDOALLOCATE (fp) != WEOF) |
d64b6ad0 | 421 | return; |
77fe0b9c UD |
422 | INTUSE(_IO_wsetb) (fp, fp->_wide_data->_shortbuf, |
423 | fp->_wide_data->_shortbuf + 1, 0); | |
d64b6ad0 | 424 | } |
77fe0b9c | 425 | INTDEF(_IO_wdoallocbuf) |
d64b6ad0 UD |
426 | |
427 | ||
428 | int | |
429 | _IO_wdefault_doallocate (fp) | |
430 | _IO_FILE *fp; | |
431 | { | |
432 | wchar_t *buf; | |
433 | ||
434 | ALLOC_WBUF (buf, _IO_BUFSIZ, EOF); | |
77fe0b9c | 435 | INTUSE(_IO_wsetb) (fp, buf, buf + _IO_BUFSIZ, 1); |
d64b6ad0 UD |
436 | return 1; |
437 | } | |
77fe0b9c | 438 | INTDEF(_IO_wdefault_doallocate) |
d64b6ad0 UD |
439 | |
440 | ||
441 | int | |
442 | _IO_switch_to_wget_mode (fp) | |
443 | _IO_FILE *fp; | |
444 | { | |
445 | if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_write_base) | |
1dc72e4f | 446 | if ((wint_t)_IO_WOVERFLOW (fp, WEOF) == WEOF) |
d64b6ad0 UD |
447 | return EOF; |
448 | if (_IO_in_backup (fp)) | |
449 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_backup_base; | |
450 | else | |
451 | { | |
452 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_buf_base; | |
453 | if (fp->_wide_data->_IO_write_ptr > fp->_wide_data->_IO_read_end) | |
454 | fp->_wide_data->_IO_read_end = fp->_wide_data->_IO_write_ptr; | |
455 | } | |
456 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_write_ptr; | |
457 | ||
458 | fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_write_ptr | |
459 | = fp->_wide_data->_IO_write_end = fp->_wide_data->_IO_read_ptr; | |
460 | ||
461 | fp->_flags &= ~_IO_CURRENTLY_PUTTING; | |
462 | return 0; | |
463 | } | |
77fe0b9c | 464 | INTDEF(_IO_switch_to_wget_mode) |
d64b6ad0 UD |
465 | |
466 | void | |
467 | _IO_free_wbackup_area (fp) | |
468 | _IO_FILE *fp; | |
469 | { | |
470 | if (_IO_in_backup (fp)) | |
77fe0b9c | 471 | INTUSE(_IO_switch_to_main_wget_area) (fp); /* Just in case. */ |
d64b6ad0 UD |
472 | free (fp->_wide_data->_IO_save_base); |
473 | fp->_wide_data->_IO_save_base = NULL; | |
474 | fp->_wide_data->_IO_save_end = NULL; | |
475 | fp->_wide_data->_IO_backup_base = NULL; | |
476 | } | |
77fe0b9c | 477 | INTDEF(_IO_free_wbackup_area) |
d64b6ad0 UD |
478 | |
479 | #if 0 | |
480 | int | |
481 | _IO_switch_to_wput_mode (fp) | |
482 | _IO_FILE *fp; | |
483 | { | |
484 | fp->_wide_data->_IO_write_base = fp->_wide_data->_IO_read_ptr; | |
485 | fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_read_ptr; | |
486 | /* Following is wrong if line- or un-buffered? */ | |
487 | fp->_wide_data->_IO_write_end = (fp->_flags & _IO_IN_BACKUP | |
488 | ? fp->_wide_data->_IO_read_end | |
489 | : fp->_wide_data->_IO_buf_end); | |
490 | ||
491 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; | |
492 | fp->_wide_data->_IO_read_base = fp->_wide_data->_IO_read_end; | |
493 | ||
494 | fp->_flags |= _IO_CURRENTLY_PUTTING; | |
495 | return 0; | |
496 | } | |
497 | #endif | |
498 | ||
499 | ||
500 | static int | |
501 | #ifdef _LIBC | |
502 | internal_function | |
503 | #endif | |
504 | save_for_wbackup (fp, end_p) | |
505 | _IO_FILE *fp; | |
506 | wchar_t *end_p; | |
507 | { | |
508 | /* Append [_IO_read_base..end_p] to backup area. */ | |
77fe0b9c | 509 | _IO_ssize_t least_mark = INTUSE(_IO_least_wmarker) (fp, end_p); |
d64b6ad0 UD |
510 | /* needed_size is how much space we need in the backup area. */ |
511 | _IO_size_t needed_size = ((end_p - fp->_wide_data->_IO_read_base) | |
512 | - least_mark); | |
513 | /* FIXME: Dubious arithmetic if pointers are NULL */ | |
514 | _IO_size_t current_Bsize = (fp->_wide_data->_IO_save_end | |
515 | - fp->_wide_data->_IO_save_base); | |
516 | _IO_size_t avail; /* Extra space available for future expansion. */ | |
517 | _IO_ssize_t delta; | |
518 | struct _IO_marker *mark; | |
519 | if (needed_size > current_Bsize) | |
520 | { | |
521 | wchar_t *new_buffer; | |
522 | avail = 100; | |
523 | new_buffer = (wchar_t *) malloc ((avail + needed_size) | |
524 | * sizeof (wchar_t)); | |
525 | if (new_buffer == NULL) | |
526 | return EOF; /* FIXME */ | |
527 | if (least_mark < 0) | |
528 | { | |
529 | #ifdef _LIBC | |
530 | __wmempcpy (__wmempcpy (new_buffer + avail, | |
531 | fp->_wide_data->_IO_save_end + least_mark, | |
532 | -least_mark), | |
533 | fp->_wide_data->_IO_read_base, | |
534 | end_p - fp->_wide_data->_IO_read_base); | |
535 | #else | |
536 | memcpy (new_buffer + avail, | |
537 | fp->_wide_data->_IO_save_end + least_mark, | |
538 | -least_mark * sizeof (wchar_t)); | |
539 | memcpy (new_buffer + avail - least_mark, | |
540 | fp->_wide_data->_IO_read_base, | |
541 | (end_p - fp->_wide_data->_IO_read_base) * sizeof (wchar_t)); | |
542 | #endif | |
543 | } | |
544 | else | |
545 | { | |
546 | #ifdef _LIBC | |
547 | __wmemcpy (new_buffer + avail, | |
548 | fp->_wide_data->_IO_read_base + least_mark, | |
549 | needed_size); | |
550 | #else | |
551 | memcpy (new_buffer + avail, | |
552 | fp->_wide_data->_IO_read_base + least_mark, | |
553 | needed_size * sizeof (wchar_t)); | |
554 | #endif | |
555 | } | |
556 | if (fp->_wide_data->_IO_save_base) | |
557 | free (fp->_wide_data->_IO_save_base); | |
558 | fp->_wide_data->_IO_save_base = new_buffer; | |
559 | fp->_wide_data->_IO_save_end = new_buffer + avail + needed_size; | |
560 | } | |
561 | else | |
562 | { | |
563 | avail = current_Bsize - needed_size; | |
564 | if (least_mark < 0) | |
565 | { | |
566 | #ifdef _LIBC | |
567 | __wmemmove (fp->_wide_data->_IO_save_base + avail, | |
568 | fp->_wide_data->_IO_save_end + least_mark, | |
569 | -least_mark); | |
570 | __wmemcpy (fp->_wide_data->_IO_save_base + avail - least_mark, | |
571 | fp->_wide_data->_IO_read_base, | |
572 | end_p - fp->_wide_data->_IO_read_base); | |
573 | #else | |
574 | memmove (fp->_wide_data->_IO_save_base + avail, | |
575 | fp->_wide_data->_IO_save_end + least_mark, | |
576 | -least_mark * sizeof (wchar_t)); | |
577 | memcpy (fp->_wide_data->_IO_save_base + avail - least_mark, | |
578 | fp->_wide_data->_IO_read_base, | |
579 | (end_p - fp->_wide_data->_IO_read_base) * sizeof (wchar_t)); | |
580 | #endif | |
581 | } | |
582 | else if (needed_size > 0) | |
583 | #ifdef _LIBC | |
584 | __wmemcpy (fp->_wide_data->_IO_save_base + avail, | |
585 | fp->_wide_data->_IO_read_base + least_mark, | |
586 | needed_size); | |
587 | #else | |
588 | memcpy (fp->_wide_data->_IO_save_base + avail, | |
589 | fp->_wide_data->_IO_read_base + least_mark, | |
590 | needed_size * sizeof (wchar_t)); | |
591 | #endif | |
592 | } | |
593 | fp->_wide_data->_IO_backup_base = fp->_wide_data->_IO_save_base + avail; | |
594 | /* Adjust all the streammarkers. */ | |
595 | delta = end_p - fp->_wide_data->_IO_read_base; | |
596 | for (mark = fp->_markers; mark != NULL; mark = mark->_next) | |
597 | mark->_pos -= delta; | |
598 | return 0; | |
599 | } | |
600 | ||
601 | wint_t | |
602 | _IO_sputbackwc (fp, c) | |
603 | _IO_FILE *fp; | |
604 | wint_t c; | |
605 | { | |
606 | wint_t result; | |
607 | ||
608 | if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base | |
609 | && (wchar_t)fp->_wide_data->_IO_read_ptr[-1] == (wchar_t) c) | |
610 | { | |
611 | fp->_wide_data->_IO_read_ptr--; | |
612 | result = c; | |
613 | } | |
614 | else | |
615 | result = _IO_PBACKFAIL (fp, c); | |
616 | ||
1dc72e4f | 617 | if (result != WEOF) |
d64b6ad0 UD |
618 | fp->_flags &= ~_IO_EOF_SEEN; |
619 | ||
620 | return result; | |
621 | } | |
77fe0b9c | 622 | INTDEF(_IO_sputbackwc) |
d64b6ad0 UD |
623 | |
624 | wint_t | |
625 | _IO_sungetwc (fp) | |
626 | _IO_FILE *fp; | |
627 | { | |
1dc72e4f | 628 | wint_t result; |
d64b6ad0 UD |
629 | |
630 | if (fp->_wide_data->_IO_read_ptr > fp->_wide_data->_IO_read_base) | |
631 | { | |
632 | fp->_wide_data->_IO_read_ptr--; | |
633 | result = *fp->_wide_data->_IO_read_ptr; | |
634 | } | |
635 | else | |
636 | result = _IO_PBACKFAIL (fp, EOF); | |
637 | ||
638 | if (result != WEOF) | |
639 | fp->_flags &= ~_IO_EOF_SEEN; | |
640 | ||
641 | return result; | |
642 | } | |
643 | ||
644 | ||
645 | unsigned | |
646 | _IO_adjust_wcolumn (start, line, count) | |
647 | unsigned start; | |
648 | const wchar_t *line; | |
649 | int count; | |
650 | { | |
651 | const wchar_t *ptr = line + count; | |
652 | while (ptr > line) | |
653 | if (*--ptr == L'\n') | |
654 | return line + count - ptr - 1; | |
655 | return start + count; | |
656 | } | |
657 | ||
658 | void | |
659 | _IO_init_wmarker (marker, fp) | |
660 | struct _IO_marker *marker; | |
661 | _IO_FILE *fp; | |
662 | { | |
663 | marker->_sbuf = fp; | |
664 | if (_IO_in_put_mode (fp)) | |
77fe0b9c | 665 | INTUSE(_IO_switch_to_wget_mode) (fp); |
d64b6ad0 UD |
666 | if (_IO_in_backup (fp)) |
667 | marker->_pos = fp->_wide_data->_IO_read_ptr - fp->_wide_data->_IO_read_end; | |
668 | else | |
669 | marker->_pos = (fp->_wide_data->_IO_read_ptr | |
670 | - fp->_wide_data->_IO_read_base); | |
671 | ||
672 | /* Should perhaps sort the chain? */ | |
673 | marker->_next = fp->_markers; | |
674 | fp->_markers = marker; | |
675 | } | |
676 | ||
677 | #define BAD_DELTA EOF | |
678 | ||
679 | /* Return difference between MARK and current position of MARK's stream. */ | |
680 | int | |
681 | _IO_wmarker_delta (mark) | |
682 | struct _IO_marker *mark; | |
683 | { | |
684 | int cur_pos; | |
685 | if (mark->_sbuf == NULL) | |
686 | return BAD_DELTA; | |
687 | if (_IO_in_backup (mark->_sbuf)) | |
688 | cur_pos = (mark->_sbuf->_wide_data->_IO_read_ptr | |
689 | - mark->_sbuf->_wide_data->_IO_read_end); | |
690 | else | |
691 | cur_pos = (mark->_sbuf->_wide_data->_IO_read_ptr | |
692 | - mark->_sbuf->_wide_data->_IO_read_base); | |
693 | return mark->_pos - cur_pos; | |
694 | } | |
695 | ||
696 | int | |
697 | _IO_seekwmark (fp, mark, delta) | |
698 | _IO_FILE *fp; | |
699 | struct _IO_marker *mark; | |
700 | int delta; | |
701 | { | |
702 | if (mark->_sbuf != fp) | |
703 | return EOF; | |
704 | if (mark->_pos >= 0) | |
705 | { | |
706 | if (_IO_in_backup (fp)) | |
77fe0b9c | 707 | INTUSE(_IO_switch_to_main_wget_area) (fp); |
d64b6ad0 UD |
708 | fp->_wide_data->_IO_read_ptr = (fp->_wide_data->_IO_read_base |
709 | + mark->_pos); | |
710 | } | |
711 | else | |
712 | { | |
713 | if (!_IO_in_backup (fp)) | |
77fe0b9c | 714 | INTUSE(_IO_switch_to_wbackup_area) (fp); |
d64b6ad0 UD |
715 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end + mark->_pos; |
716 | } | |
717 | return 0; | |
718 | } | |
719 | ||
720 | void | |
721 | _IO_unsave_wmarkers (fp) | |
722 | _IO_FILE *fp; | |
723 | { | |
724 | struct _IO_marker *mark = fp->_markers; | |
725 | if (mark) | |
726 | { | |
727 | #ifdef TODO | |
728 | streampos offset = seekoff (0, ios::cur, ios::in); | |
729 | if (offset != EOF) | |
730 | { | |
731 | offset += eGptr () - Gbase (); | |
732 | for ( ; mark != NULL; mark = mark->_next) | |
733 | mark->set_streampos (mark->_pos + offset); | |
734 | } | |
735 | else | |
736 | { | |
737 | for ( ; mark != NULL; mark = mark->_next) | |
738 | mark->set_streampos (EOF); | |
739 | } | |
740 | #endif | |
741 | fp->_markers = 0; | |
742 | } | |
743 | ||
744 | if (_IO_have_backup (fp)) | |
77fe0b9c | 745 | INTUSE(_IO_free_wbackup_area) (fp); |
d64b6ad0 | 746 | } |