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284749da | 1 | /* Copyright (C) 1993, 1995, 1997-2001, 2002 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
40a55d20 | 3 | Written by Per Bothner <bothner@cygnus.com>. |
96aa2d94 | 4 | |
41bdb6e2 AJ |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
96aa2d94 | 9 | |
41bdb6e2 AJ |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
40a55d20 | 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 | 13 | Lesser General Public License for more details. |
96aa2d94 | 14 | |
41bdb6e2 AJ |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library; if not, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. | |
96aa2d94 | 19 | |
41bdb6e2 AJ |
20 | As a special exception, if you link the code in this file with |
21 | files compiled with a GNU compiler to produce an executable, | |
22 | that does not cause the resulting executable to be covered by | |
23 | the GNU Lesser General Public License. This exception does not | |
24 | however invalidate any other reasons why the executable file | |
25 | might be covered by the GNU Lesser General Public License. | |
26 | This exception applies to code released by its copyright holders | |
27 | in files containing the exception. */ | |
96aa2d94 | 28 | |
96aa2d94 | 29 | |
fa0bc87c RM |
30 | #ifndef _POSIX_SOURCE |
31 | # define _POSIX_SOURCE | |
32 | #endif | |
96aa2d94 | 33 | #include "libioP.h" |
129d706d | 34 | #include <assert.h> |
96aa2d94 | 35 | #include <fcntl.h> |
284749da | 36 | #include <sys/param.h> |
96aa2d94 RM |
37 | #include <sys/types.h> |
38 | #include <sys/stat.h> | |
39 | #include <string.h> | |
40 | #include <errno.h> | |
c9f10034 | 41 | #include <unistd.h> |
00bc5db0 UD |
42 | #ifdef __STDC__ |
43 | #include <stdlib.h> | |
44 | #endif | |
4e2e9999 UD |
45 | #if _LIBC |
46 | # include "../wcsmbs/wcsmbsload.h" | |
129d706d UD |
47 | # include "../iconv/gconv_charset.h" |
48 | # include "../iconv/gconv_int.h" | |
0bf98029 | 49 | # include <shlib-compat.h> |
4e2e9999 | 50 | #endif |
96aa2d94 RM |
51 | #ifndef errno |
52 | extern int errno; | |
53 | #endif | |
4547c1a4 UD |
54 | #ifndef __set_errno |
55 | # define __set_errno(Val) errno = (Val) | |
56 | #endif | |
96aa2d94 | 57 | |
68dbb3a6 UD |
58 | |
59 | #ifdef _LIBC | |
61eb22d3 UD |
60 | # define open(Name, Flags, Prot) __open (Name, Flags, Prot) |
61 | # define close(FD) __close (FD) | |
61eb22d3 UD |
62 | # define lseek(FD, Offset, Whence) __lseek (FD, Offset, Whence) |
63 | # define read(FD, Buf, NBytes) __read (FD, Buf, NBytes) | |
64 | # define write(FD, Buf, NBytes) __write (FD, Buf, NBytes) | |
4483f2c0 | 65 | # define _IO_do_write _IO_new_do_write /* For macro uses. */ |
319d719d UD |
66 | #else |
67 | # define _IO_new_do_write _IO_do_write | |
68 | # define _IO_new_file_attach _IO_file_attach | |
69 | # define _IO_new_file_close_it _IO_file_close_it | |
70 | # define _IO_new_file_finish _IO_file_finish | |
71 | # define _IO_new_file_fopen _IO_file_fopen | |
72 | # define _IO_new_file_init _IO_file_init | |
73 | # define _IO_new_file_setbuf _IO_file_setbuf | |
74 | # define _IO_new_file_sync _IO_file_sync | |
75 | # define _IO_new_file_overflow _IO_file_overflow | |
76 | # define _IO_new_file_seekoff _IO_file_seekoff | |
77 | # define _IO_new_file_underflow _IO_file_underflow | |
78 | # define _IO_new_file_write _IO_file_write | |
79 | # define _IO_new_file_xsputn _IO_file_xsputn | |
68dbb3a6 UD |
80 | #endif |
81 | ||
129d706d UD |
82 | |
83 | #ifdef _LIBC | |
ab26a24a | 84 | extern struct __gconv_trans_data __libio_translit attribute_hidden; |
129d706d UD |
85 | #endif |
86 | ||
87 | ||
96aa2d94 RM |
88 | /* An fstream can be in at most one of put mode, get mode, or putback mode. |
89 | Putback mode is a variant of get mode. | |
90 | ||
91 | In a filebuf, there is only one current position, instead of two | |
6d52618b | 92 | separate get and put pointers. In get mode, the current position |
96aa2d94 RM |
93 | is that of gptr(); in put mode that of pptr(). |
94 | ||
95 | The position in the buffer that corresponds to the position | |
a18f587d UD |
96 | in external file system is normally _IO_read_end, except in putback |
97 | mode, when it is _IO_save_end. | |
96aa2d94 RM |
98 | If the field _fb._offset is >= 0, it gives the offset in |
99 | the file as a whole corresponding to eGptr(). (?) | |
100 | ||
101 | PUT MODE: | |
a18f587d UD |
102 | If a filebuf is in put mode, then all of _IO_read_ptr, _IO_read_end, |
103 | and _IO_read_base are equal to each other. These are usually equal | |
104 | to _IO_buf_base, though not necessarily if we have switched from | |
105 | get mode to put mode. (The reason is to maintain the invariant | |
106 | that _IO_read_end corresponds to the external file position.) | |
107 | _IO_write_base is non-NULL and usually equal to _IO_base_base. | |
108 | We also have _IO_write_end == _IO_buf_end, but only in fully buffered mode. | |
109 | The un-flushed character are those between _IO_write_base and _IO_write_ptr. | |
110 | ||
96aa2d94 RM |
111 | GET MODE: |
112 | If a filebuf is in get or putback mode, eback() != egptr(). | |
113 | In get mode, the unread characters are between gptr() and egptr(). | |
114 | The OS file position corresponds to that of egptr(). | |
a18f587d | 115 | |
96aa2d94 RM |
116 | PUTBACK MODE: |
117 | Putback mode is used to remember "excess" characters that have | |
118 | been sputbackc'd in a separate putback buffer. | |
119 | In putback mode, the get buffer points to the special putback buffer. | |
120 | The unread characters are the characters between gptr() and egptr() | |
121 | in the putback buffer, as well as the area between save_gptr() | |
122 | and save_egptr(), which point into the original reserve buffer. | |
123 | (The pointers save_gptr() and save_egptr() are the values | |
124 | of gptr() and egptr() at the time putback mode was entered.) | |
125 | The OS position corresponds to that of save_egptr(). | |
23396375 | 126 | |
96aa2d94 | 127 | LINE BUFFERED OUTPUT: |
a18f587d | 128 | During line buffered output, _IO_write_base==base() && epptr()==base(). |
96aa2d94 RM |
129 | However, ptr() may be anywhere between base() and ebuf(). |
130 | This forces a call to filebuf::overflow(int C) on every put. | |
131 | If there is more space in the buffer, and C is not a '\n', | |
132 | then C is inserted, and pptr() incremented. | |
23396375 | 133 | |
96aa2d94 RM |
134 | UNBUFFERED STREAMS: |
135 | If a filebuf is unbuffered(), the _shortbuf[1] is used as the buffer. | |
136 | */ | |
137 | ||
138 | #define CLOSED_FILEBUF_FLAGS \ | |
139 | (_IO_IS_FILEBUF+_IO_NO_READS+_IO_NO_WRITES+_IO_TIED_PUT_GET) | |
140 | ||
141 | ||
142 | void | |
b259e746 | 143 | _IO_new_file_init (fp) |
2ca8b1ee | 144 | struct _IO_FILE_plus *fp; |
96aa2d94 RM |
145 | { |
146 | /* POSIX.1 allows another file handle to be used to change the position | |
147 | of our file descriptor. Hence we actually don't know the actual | |
148 | position before we do the first fseek (and until a following fflush). */ | |
2ca8b1ee GM |
149 | fp->file._offset = _IO_pos_BAD; |
150 | fp->file._IO_file_flags |= CLOSED_FILEBUF_FLAGS; | |
96aa2d94 | 151 | |
77fe0b9c | 152 | INTUSE(_IO_link_in) (fp); |
2ca8b1ee | 153 | fp->file._fileno = -1; |
96aa2d94 | 154 | } |
77fe0b9c | 155 | INTDEF2(_IO_new_file_init, _IO_file_init) |
96aa2d94 RM |
156 | |
157 | int | |
b259e746 | 158 | _IO_new_file_close_it (fp) |
40a55d20 | 159 | _IO_FILE *fp; |
96aa2d94 | 160 | { |
fa0bc87c | 161 | int write_status, close_status; |
40a55d20 | 162 | if (!_IO_file_is_open (fp)) |
96aa2d94 RM |
163 | return EOF; |
164 | ||
3384a8d6 UD |
165 | if ((fp->_flags & _IO_NO_WRITES) == 0 |
166 | && (fp->_flags & _IO_CURRENTLY_PUTTING) != 0) | |
167 | write_status = _IO_do_flush (fp); | |
168 | else | |
169 | write_status = 0; | |
96aa2d94 | 170 | |
77fe0b9c | 171 | INTUSE(_IO_unsave_markers) (fp); |
96aa2d94 RM |
172 | |
173 | close_status = _IO_SYSCLOSE (fp); | |
174 | ||
175 | /* Free buffer. */ | |
d64b6ad0 UD |
176 | if (fp->_mode <= 0) |
177 | { | |
77fe0b9c | 178 | INTUSE(_IO_setb) (fp, NULL, NULL, 0); |
d64b6ad0 UD |
179 | _IO_setg (fp, NULL, NULL, NULL); |
180 | _IO_setp (fp, NULL, NULL); | |
181 | } | |
319d719d | 182 | #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T |
d64b6ad0 UD |
183 | else |
184 | { | |
44c4ccbc UD |
185 | if (_IO_have_wbackup (fp)) |
186 | INTUSE(_IO_free_wbackup_area) (fp); | |
77fe0b9c | 187 | INTUSE(_IO_wsetb) (fp, NULL, NULL, 0); |
d64b6ad0 UD |
188 | _IO_wsetg (fp, NULL, NULL, NULL); |
189 | _IO_wsetp (fp, NULL, NULL); | |
190 | } | |
319d719d | 191 | #endif |
96aa2d94 | 192 | |
77fe0b9c | 193 | INTUSE(_IO_un_link) ((struct _IO_FILE_plus *) fp); |
96aa2d94 | 194 | fp->_flags = _IO_MAGIC|CLOSED_FILEBUF_FLAGS; |
110215a9 | 195 | fp->_fileno = -1; |
bd355af0 | 196 | fp->_offset = _IO_pos_BAD; |
96aa2d94 | 197 | |
fa0bc87c | 198 | return close_status ? close_status : write_status; |
96aa2d94 | 199 | } |
77fe0b9c | 200 | INTDEF2(_IO_new_file_close_it, _IO_file_close_it) |
96aa2d94 RM |
201 | |
202 | void | |
b259e746 | 203 | _IO_new_file_finish (fp, dummy) |
40a55d20 UD |
204 | _IO_FILE *fp; |
205 | int dummy; | |
96aa2d94 | 206 | { |
40a55d20 | 207 | if (_IO_file_is_open (fp)) |
96aa2d94 RM |
208 | { |
209 | _IO_do_flush (fp); | |
210 | if (!(fp->_flags & _IO_DELETE_DONT_CLOSE)) | |
211 | _IO_SYSCLOSE (fp); | |
212 | } | |
77fe0b9c | 213 | INTUSE(_IO_default_finish) (fp, 0); |
96aa2d94 | 214 | } |
77fe0b9c | 215 | INTDEF2(_IO_new_file_finish, _IO_file_finish) |
96aa2d94 | 216 | |
bd355af0 UD |
217 | #if defined __GNUC__ && __GNUC__ >= 2 |
218 | __inline__ | |
219 | #endif | |
220 | _IO_FILE * | |
221 | _IO_file_open (fp, filename, posix_mode, prot, read_write, is32not64) | |
222 | _IO_FILE *fp; | |
223 | const char *filename; | |
224 | int posix_mode; | |
225 | int prot; | |
226 | int read_write; | |
227 | int is32not64; | |
228 | { | |
229 | int fdesc; | |
230 | #ifdef _G_OPEN64 | |
231 | fdesc = (is32not64 | |
232 | ? open (filename, posix_mode, prot) | |
233 | : _G_OPEN64 (filename, posix_mode, prot)); | |
234 | #else | |
235 | fdesc = open (filename, posix_mode, prot); | |
236 | #endif | |
237 | if (fdesc < 0) | |
238 | return NULL; | |
239 | fp->_fileno = fdesc; | |
240 | _IO_mask_flags (fp, read_write,_IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING); | |
c096ab25 | 241 | if ((read_write & _IO_IS_APPENDING) && (read_write & _IO_NO_READS)) |
bd355af0 UD |
242 | if (_IO_SEEKOFF (fp, (_IO_off64_t)0, _IO_seek_end, _IOS_INPUT|_IOS_OUTPUT) |
243 | == _IO_pos_BAD && errno != ESPIPE) | |
2c617417 UD |
244 | { |
245 | close (fdesc); | |
246 | return NULL; | |
247 | } | |
77fe0b9c | 248 | INTUSE(_IO_link_in) ((struct _IO_FILE_plus *) fp); |
bd355af0 UD |
249 | return fp; |
250 | } | |
251 | ||
96aa2d94 | 252 | _IO_FILE * |
b259e746 | 253 | _IO_new_file_fopen (fp, filename, mode, is32not64) |
40a55d20 UD |
254 | _IO_FILE *fp; |
255 | const char *filename; | |
256 | const char *mode; | |
dfd2257a | 257 | int is32not64; |
96aa2d94 RM |
258 | { |
259 | int oflags = 0, omode; | |
bd355af0 | 260 | int read_write; |
96aa2d94 | 261 | int oprot = 0666; |
f38931a9 | 262 | int i; |
4e2e9999 | 263 | _IO_FILE *result; |
129d706d | 264 | #ifdef _LIBC |
4e2e9999 | 265 | const char *cs; |
129d706d | 266 | const char *last_recognized; |
4e2e9999 UD |
267 | #endif |
268 | ||
96aa2d94 RM |
269 | if (_IO_file_is_open (fp)) |
270 | return 0; | |
f38931a9 | 271 | switch (*mode) |
40a55d20 UD |
272 | { |
273 | case 'r': | |
274 | omode = O_RDONLY; | |
275 | read_write = _IO_NO_WRITES; | |
276 | break; | |
277 | case 'w': | |
278 | omode = O_WRONLY; | |
279 | oflags = O_CREAT|O_TRUNC; | |
280 | read_write = _IO_NO_READS; | |
281 | break; | |
282 | case 'a': | |
283 | omode = O_WRONLY; | |
284 | oflags = O_CREAT|O_APPEND; | |
285 | read_write = _IO_NO_READS|_IO_IS_APPENDING; | |
286 | break; | |
287 | default: | |
288 | __set_errno (EINVAL); | |
289 | return NULL; | |
290 | } | |
129d706d UD |
291 | #ifdef _LIBC |
292 | last_recognized = mode; | |
293 | #endif | |
b7fc6d07 | 294 | for (i = 1; i < 5; ++i) |
40a55d20 | 295 | { |
f38931a9 UD |
296 | switch (*++mode) |
297 | { | |
298 | case '\0': | |
299 | break; | |
300 | case '+': | |
301 | omode = O_RDWR; | |
302 | read_write &= _IO_IS_APPENDING; | |
129d706d UD |
303 | #ifdef _LIBC |
304 | last_recognized = mode; | |
305 | #endif | |
f38931a9 UD |
306 | continue; |
307 | case 'x': | |
308 | oflags |= O_EXCL; | |
129d706d UD |
309 | #ifdef _LIBC |
310 | last_recognized = mode; | |
311 | #endif | |
f38931a9 UD |
312 | continue; |
313 | case 'b': | |
129d706d UD |
314 | #ifdef _LIBC |
315 | last_recognized = mode; | |
316 | #endif | |
b7fc6d07 UD |
317 | continue; |
318 | case 'm': | |
319 | fp->_flags2 |= _IO_FLAGS2_MMAP; | |
320 | continue; | |
f38931a9 UD |
321 | default: |
322 | /* Ignore. */ | |
323 | continue; | |
324 | } | |
325 | break; | |
40a55d20 | 326 | } |
f38931a9 | 327 | |
4e2e9999 UD |
328 | result = _IO_file_open (fp, filename, omode|oflags, oprot, read_write, |
329 | is32not64); | |
330 | ||
331 | ||
129d706d UD |
332 | #ifdef _LIBC |
333 | if (result != NULL) | |
4e2e9999 | 334 | { |
129d706d UD |
335 | /* Test whether the mode string specifies the conversion. */ |
336 | cs = strstr (last_recognized + 1, ",ccs="); | |
337 | if (cs != NULL) | |
338 | { | |
339 | /* Yep. Load the appropriate conversions and set the orientation | |
340 | to wide. */ | |
341 | struct gconv_fcts fcts; | |
342 | struct _IO_codecvt *cc; | |
343 | char *endp = __strchrnul (cs + 5, ','); | |
344 | char ccs[endp - (cs + 5) + 3]; | |
345 | ||
346 | *((char *) __mempcpy (ccs, cs + 5, endp - (cs + 5))) = '\0'; | |
347 | strip (ccs, ccs); | |
348 | ||
349 | if (__wcsmbs_named_conv (&fcts, ccs[2] == '\0' | |
350 | ? upstr (ccs, cs + 5) : ccs) != 0) | |
351 | { | |
352 | /* Something went wrong, we cannot load the conversion modules. | |
353 | This means we cannot proceed since the user explicitly asked | |
354 | for these. */ | |
355 | __set_errno (EINVAL); | |
356 | return NULL; | |
357 | } | |
358 | ||
359 | assert (fcts.towc_nsteps == 1); | |
360 | assert (fcts.tomb_nsteps == 1); | |
361 | ||
362 | fp->_wide_data->_IO_read_ptr = fp->_wide_data->_IO_read_end; | |
363 | fp->_wide_data->_IO_write_ptr = fp->_wide_data->_IO_write_base; | |
364 | ||
365 | /* Clear the state. We start all over again. */ | |
366 | memset (&fp->_wide_data->_IO_state, '\0', sizeof (__mbstate_t)); | |
367 | memset (&fp->_wide_data->_IO_last_state, '\0', sizeof (__mbstate_t)); | |
368 | ||
369 | cc = fp->_codecvt = &fp->_wide_data->_codecvt; | |
370 | ||
371 | /* The functions are always the same. */ | |
372 | *cc = __libio_codecvt; | |
373 | ||
374 | cc->__cd_in.__cd.__nsteps = fcts.towc_nsteps; | |
375 | cc->__cd_in.__cd.__steps = fcts.towc; | |
376 | ||
377 | cc->__cd_in.__cd.__data[0].__invocation_counter = 0; | |
378 | cc->__cd_in.__cd.__data[0].__internal_use = 1; | |
379 | cc->__cd_in.__cd.__data[0].__flags = __GCONV_IS_LAST; | |
380 | cc->__cd_in.__cd.__data[0].__statep = &result->_wide_data->_IO_state; | |
381 | ||
382 | /* XXX For now no transliteration. */ | |
383 | cc->__cd_in.__cd.__data[0].__trans = NULL; | |
384 | ||
385 | cc->__cd_out.__cd.__nsteps = fcts.tomb_nsteps; | |
386 | cc->__cd_out.__cd.__steps = fcts.tomb; | |
387 | ||
388 | cc->__cd_out.__cd.__data[0].__invocation_counter = 0; | |
389 | cc->__cd_out.__cd.__data[0].__internal_use = 1; | |
390 | cc->__cd_out.__cd.__data[0].__flags = __GCONV_IS_LAST; | |
391 | cc->__cd_out.__cd.__data[0].__statep = | |
392 | &result->_wide_data->_IO_state; | |
393 | ||
394 | /* And now the transliteration. */ | |
395 | cc->__cd_out.__cd.__data[0].__trans = &__libio_translit; | |
396 | ||
397 | /* Set the mode now. */ | |
398 | result->_mode = 1; | |
399 | ||
400 | /* We don't need the step data structure anymore. */ | |
401 | __gconv_release_cache (fcts.towc, fcts.towc_nsteps); | |
402 | __gconv_release_cache (fcts.tomb, fcts.tomb_nsteps); | |
403 | } | |
4e2e9999 UD |
404 | } |
405 | #endif /* GNU libc */ | |
406 | ||
407 | return result; | |
96aa2d94 | 408 | } |
77fe0b9c | 409 | INTDEF2(_IO_new_file_fopen, _IO_file_fopen) |
96aa2d94 | 410 | |
40a55d20 | 411 | _IO_FILE * |
b259e746 | 412 | _IO_new_file_attach (fp, fd) |
40a55d20 UD |
413 | _IO_FILE *fp; |
414 | int fd; | |
96aa2d94 | 415 | { |
40a55d20 | 416 | if (_IO_file_is_open (fp)) |
96aa2d94 RM |
417 | return NULL; |
418 | fp->_fileno = fd; | |
419 | fp->_flags &= ~(_IO_NO_READS+_IO_NO_WRITES); | |
420 | fp->_flags |= _IO_DELETE_DONT_CLOSE; | |
f65fd747 UD |
421 | /* Get the current position of the file. */ |
422 | /* We have to do that since that may be junk. */ | |
bd355af0 | 423 | fp->_offset = _IO_pos_BAD; |
dfd2257a | 424 | if (_IO_SEEKOFF (fp, (_IO_off64_t)0, _IO_seek_cur, _IOS_INPUT|_IOS_OUTPUT) |
f65fd747 UD |
425 | == _IO_pos_BAD && errno != ESPIPE) |
426 | return NULL; | |
96aa2d94 RM |
427 | return fp; |
428 | } | |
77fe0b9c | 429 | INTDEF2(_IO_new_file_attach, _IO_file_attach) |
96aa2d94 | 430 | |
40a55d20 | 431 | _IO_FILE * |
b259e746 | 432 | _IO_new_file_setbuf (fp, p, len) |
40a55d20 UD |
433 | _IO_FILE *fp; |
434 | char *p; | |
435 | _IO_ssize_t len; | |
96aa2d94 | 436 | { |
d64b6ad0 UD |
437 | if (_IO_default_setbuf (fp, p, len) == NULL) |
438 | return NULL; | |
96aa2d94 | 439 | |
d64b6ad0 UD |
440 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end |
441 | = fp->_IO_buf_base; | |
442 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
96aa2d94 | 443 | |
d64b6ad0 | 444 | return fp; |
96aa2d94 | 445 | } |
77fe0b9c | 446 | INTDEF2(_IO_new_file_setbuf, _IO_file_setbuf) |
96aa2d94 | 447 | |
bff334e0 UD |
448 | |
449 | _IO_FILE * | |
450 | _IO_file_setbuf_mmap (fp, p, len) | |
451 | _IO_FILE *fp; | |
452 | char *p; | |
453 | _IO_ssize_t len; | |
454 | { | |
455 | _IO_FILE *result; | |
456 | ||
457 | /* Change the function table. */ | |
230491f0 | 458 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &INTUSE(_IO_file_jumps); |
bff334e0 UD |
459 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; |
460 | ||
461 | /* And perform the normal operation. */ | |
462 | result = _IO_new_file_setbuf (fp, p, len); | |
463 | ||
464 | /* If the call failed, restore to using mmap. */ | |
465 | if (result == NULL) | |
466 | { | |
467 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_file_jumps_mmap; | |
468 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap; | |
469 | } | |
470 | ||
471 | return result; | |
472 | } | |
473 | ||
0720f75c UD |
474 | static int new_do_write __P ((_IO_FILE *, const char *, _IO_size_t)); |
475 | ||
96aa2d94 | 476 | /* Write TO_DO bytes from DATA to FP. |
68dbb3a6 | 477 | Then mark FP as having empty buffers. */ |
96aa2d94 RM |
478 | |
479 | int | |
b259e746 | 480 | _IO_new_do_write (fp, data, to_do) |
40a55d20 UD |
481 | _IO_FILE *fp; |
482 | const char *data; | |
483 | _IO_size_t to_do; | |
0720f75c | 484 | { |
6dd67bd5 UD |
485 | return (to_do == 0 |
486 | || (_IO_size_t) new_do_write (fp, data, to_do) == to_do) ? 0 : EOF; | |
0720f75c | 487 | } |
77fe0b9c | 488 | INTDEF2(_IO_new_do_write, _IO_do_write) |
0720f75c UD |
489 | |
490 | static | |
491 | int | |
492 | new_do_write (fp, data, to_do) | |
493 | _IO_FILE *fp; | |
494 | const char *data; | |
495 | _IO_size_t to_do; | |
96aa2d94 RM |
496 | { |
497 | _IO_size_t count; | |
96aa2d94 RM |
498 | if (fp->_flags & _IO_IS_APPENDING) |
499 | /* On a system without a proper O_APPEND implementation, | |
500 | you would need to sys_seek(0, SEEK_END) here, but is | |
501 | is not needed nor desirable for Unix- or Posix-like systems. | |
502 | Instead, just indicate that offset (before and after) is | |
503 | unpredictable. */ | |
bd355af0 | 504 | fp->_offset = _IO_pos_BAD; |
96aa2d94 | 505 | else if (fp->_IO_read_end != fp->_IO_write_base) |
23396375 | 506 | { |
d64b6ad0 | 507 | _IO_off64_t new_pos |
40a55d20 | 508 | = _IO_SYSSEEK (fp, fp->_IO_write_base - fp->_IO_read_end, 1); |
96aa2d94 | 509 | if (new_pos == _IO_pos_BAD) |
0720f75c | 510 | return 0; |
bd355af0 | 511 | fp->_offset = new_pos; |
96aa2d94 RM |
512 | } |
513 | count = _IO_SYSWRITE (fp, data, to_do); | |
0720f75c | 514 | if (fp->_cur_column && count) |
77fe0b9c UD |
515 | fp->_cur_column = INTUSE(_IO_adjust_column) (fp->_cur_column - 1, data, |
516 | count) + 1; | |
40a55d20 | 517 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); |
96aa2d94 | 518 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_buf_base; |
076bfcf6 | 519 | fp->_IO_write_end = (fp->_mode <= 0 |
d64b6ad0 | 520 | && (fp->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) |
40a55d20 | 521 | ? fp->_IO_buf_base : fp->_IO_buf_end); |
0720f75c | 522 | return count; |
96aa2d94 RM |
523 | } |
524 | ||
525 | int | |
b259e746 | 526 | _IO_new_file_underflow (fp) |
40a55d20 | 527 | _IO_FILE *fp; |
96aa2d94 RM |
528 | { |
529 | _IO_ssize_t count; | |
530 | #if 0 | |
531 | /* SysV does not make this test; take it out for compatibility */ | |
532 | if (fp->_flags & _IO_EOF_SEEN) | |
533 | return (EOF); | |
534 | #endif | |
535 | ||
536 | if (fp->_flags & _IO_NO_READS) | |
feb3c934 | 537 | { |
58034572 | 538 | fp->_flags |= _IO_ERR_SEEN; |
feb3c934 UD |
539 | __set_errno (EBADF); |
540 | return EOF; | |
541 | } | |
96aa2d94 | 542 | if (fp->_IO_read_ptr < fp->_IO_read_end) |
40a55d20 | 543 | return *(unsigned char *) fp->_IO_read_ptr; |
96aa2d94 RM |
544 | |
545 | if (fp->_IO_buf_base == NULL) | |
00bc5db0 UD |
546 | { |
547 | /* Maybe we already have a push back pointer. */ | |
548 | if (fp->_IO_save_base != NULL) | |
549 | { | |
550 | free (fp->_IO_save_base); | |
551 | fp->_flags &= ~_IO_IN_BACKUP; | |
552 | } | |
77fe0b9c | 553 | INTUSE(_IO_doallocbuf) (fp); |
00bc5db0 | 554 | } |
96aa2d94 RM |
555 | |
556 | /* Flush all line buffered files before reading. */ | |
557 | /* FIXME This can/should be moved to genops ?? */ | |
558 | if (fp->_flags & (_IO_LINE_BUF|_IO_UNBUFFERED)) | |
3d759cb8 UD |
559 | { |
560 | #if 0 | |
77fe0b9c | 561 | INTUSE(_IO_flush_all_linebuffered) (); |
3d759cb8 UD |
562 | #else |
563 | /* We used to flush all line-buffered stream. This really isn't | |
564 | required by any standard. My recollection is that | |
565 | traditional Unix systems did this for stdout. stderr better | |
566 | not be line buffered. So we do just that here | |
567 | explicitly. --drepper */ | |
568 | _IO_cleanup_region_start ((void (*) __P ((void *))) _IO_funlockfile, | |
569 | _IO_stdout); | |
570 | _IO_flockfile (_IO_stdout); | |
571 | ||
572 | if ((_IO_stdout->_flags & (_IO_LINKED | _IO_NO_WRITES | _IO_LINE_BUF)) | |
573 | == (_IO_LINKED | _IO_LINE_BUF)) | |
574 | _IO_OVERFLOW (_IO_stdout, EOF); | |
575 | ||
576 | _IO_funlockfile (_IO_stdout); | |
577 | _IO_cleanup_region_end (0); | |
578 | #endif | |
579 | } | |
96aa2d94 | 580 | |
77fe0b9c | 581 | INTUSE(_IO_switch_to_get_mode) (fp); |
96aa2d94 | 582 | |
2d7da676 UD |
583 | /* This is very tricky. We have to adjust those |
584 | pointers before we call _IO_SYSREAD () since | |
585 | we may longjump () out while waiting for | |
586 | input. Those pointers may be screwed up. H.J. */ | |
587 | fp->_IO_read_base = fp->_IO_read_ptr = fp->_IO_buf_base; | |
588 | fp->_IO_read_end = fp->_IO_buf_base; | |
589 | fp->_IO_write_base = fp->_IO_write_ptr = fp->_IO_write_end | |
590 | = fp->_IO_buf_base; | |
591 | ||
96aa2d94 RM |
592 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, |
593 | fp->_IO_buf_end - fp->_IO_buf_base); | |
594 | if (count <= 0) | |
595 | { | |
596 | if (count == 0) | |
597 | fp->_flags |= _IO_EOF_SEEN; | |
598 | else | |
599 | fp->_flags |= _IO_ERR_SEEN, count = 0; | |
600 | } | |
2d7da676 | 601 | fp->_IO_read_end += count; |
96aa2d94 RM |
602 | if (count == 0) |
603 | return EOF; | |
bd355af0 UD |
604 | if (fp->_offset != _IO_pos_BAD) |
605 | _IO_pos_adjust (fp->_offset, count); | |
40a55d20 | 606 | return *(unsigned char *) fp->_IO_read_ptr; |
96aa2d94 | 607 | } |
77fe0b9c | 608 | INTDEF2(_IO_new_file_underflow, _IO_file_underflow) |
96aa2d94 | 609 | |
acbee5f6 RM |
610 | /* Guts of underflow callback if we mmap the file. This stats the file and |
611 | updates the stream state to match. In the normal case we return zero. | |
612 | If the file is no longer eligible for mmap, its jump tables are reset to | |
613 | the vanilla ones and we return nonzero. */ | |
614 | static int | |
615 | mmap_remap_check (_IO_FILE *fp) | |
0469311e | 616 | { |
acbee5f6 RM |
617 | struct _G_stat64 st; |
618 | ||
619 | if (_IO_SYSSTAT (fp, &st) == 0 | |
620 | && S_ISREG (st.st_mode) && st.st_size != 0 | |
621 | /* Limit the file size to 1MB for 32-bit machines. */ | |
622 | && (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024)) | |
0469311e | 623 | { |
acbee5f6 RM |
624 | const size_t pagesize = __getpagesize (); |
625 | # define ROUNDED(x) (((x) + pagesize - 1) & ~(pagesize - 1)) | |
626 | if (ROUNDED (st.st_size) < ROUNDED (fp->_IO_buf_end | |
627 | - fp->_IO_buf_base)) | |
628 | { | |
629 | /* We can trim off some pages past the end of the file. */ | |
630 | (void) __munmap (fp->_IO_buf_base + ROUNDED (st.st_size), | |
631 | ROUNDED (fp->_IO_buf_end - fp->_IO_buf_base) | |
632 | - ROUNDED (st.st_size)); | |
633 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
634 | } | |
635 | else if (ROUNDED (st.st_size) > ROUNDED (fp->_IO_buf_end | |
636 | - fp->_IO_buf_base)) | |
637 | { | |
638 | /* The file added some pages. We need to remap it. */ | |
639 | void *p; | |
640 | #if defined __linux__ /* XXX */ | |
641 | p = __mremap (fp->_IO_buf_base, ROUNDED (fp->_IO_buf_end | |
642 | - fp->_IO_buf_base), | |
643 | ROUNDED (st.st_size), MREMAP_MAYMOVE); | |
644 | if (p == MAP_FAILED) | |
645 | { | |
646 | (void) __munmap (fp->_IO_buf_base, | |
647 | fp->_IO_buf_end - fp->_IO_buf_base); | |
648 | goto punt; | |
649 | } | |
650 | #else | |
651 | (void) __munmap (fp->_IO_buf_base, | |
652 | fp->_IO_buf_end - fp->_IO_buf_base); | |
653 | # ifdef _G_MMAP64 | |
654 | p = _G_MMAP64 (NULL, st.st_size, PROT_READ, MAP_SHARED, | |
655 | fp->_fileno, 0); | |
656 | # else | |
657 | p = __mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, | |
658 | fp->_fileno, 0); | |
659 | # endif | |
660 | if (p == MAP_FAILED) | |
661 | goto punt; | |
662 | #endif | |
663 | fp->_IO_buf_base = p; | |
664 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
665 | } | |
666 | else | |
667 | { | |
668 | /* The number of pages didn't change. */ | |
669 | fp->_IO_buf_end = fp->_IO_buf_base + st.st_size; | |
670 | } | |
671 | # undef ROUNDED | |
672 | ||
673 | fp->_offset -= fp->_IO_read_end - fp->_IO_read_ptr; | |
fc77d66a RM |
674 | _IO_setg (fp, fp->_IO_buf_base, |
675 | fp->_offset < fp->_IO_buf_end - fp->_IO_buf_base | |
676 | ? fp->_IO_buf_base + fp->_offset : fp->_IO_buf_end, | |
acbee5f6 | 677 | fp->_IO_buf_end); |
c4292489 | 678 | |
fc77d66a RM |
679 | /* If we are already positioned at or past the end of the file, don't |
680 | change the current offset. If not, seek past what we have mapped, | |
681 | mimicking the position left by a normal underflow reading into its | |
682 | buffer until EOF. */ | |
683 | ||
684 | if (fp->_offset < fp->_IO_buf_end - fp->_IO_buf_base) | |
685 | { | |
686 | if ( | |
0469311e | 687 | # ifdef _G_LSEEK64 |
fc77d66a | 688 | _G_LSEEK64 |
0469311e | 689 | # else |
fc77d66a | 690 | __lseek |
0469311e | 691 | # endif |
fc77d66a RM |
692 | (fp->_fileno, fp->_IO_buf_end - fp->_IO_buf_base, SEEK_SET) |
693 | != fp->_IO_buf_end - fp->_IO_buf_base) | |
694 | fp->_flags |= _IO_ERR_SEEN; | |
695 | else | |
696 | fp->_offset = fp->_IO_buf_end - fp->_IO_buf_base; | |
0469311e | 697 | } |
acbee5f6 RM |
698 | |
699 | return 0; | |
700 | } | |
701 | else | |
702 | { | |
703 | /* Life is no longer good for mmap. Punt it. */ | |
704 | (void) __munmap (fp->_IO_buf_base, | |
705 | fp->_IO_buf_end - fp->_IO_buf_base); | |
706 | punt: | |
707 | fp->_IO_buf_base = fp->_IO_buf_end = NULL; | |
708 | _IO_setg (fp, NULL, NULL, NULL); | |
709 | if (fp->_mode <= 0) | |
230491f0 | 710 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &INTUSE(_IO_file_jumps); |
acbee5f6 RM |
711 | else |
712 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_wfile_jumps; | |
713 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; | |
714 | ||
715 | return 1; | |
0469311e | 716 | } |
acbee5f6 RM |
717 | } |
718 | ||
719 | /* Special callback replacing the underflow callbacks if we mmap the file. */ | |
720 | int | |
721 | _IO_file_underflow_mmap (_IO_FILE *fp) | |
722 | { | |
723 | if (fp->_IO_read_ptr < fp->_IO_read_end) | |
724 | return *(unsigned char *) fp->_IO_read_ptr; | |
725 | ||
726 | if (__builtin_expect (mmap_remap_check (fp), 0)) | |
727 | /* We punted to the regular file functions. */ | |
728 | return _IO_UNDERFLOW (fp); | |
729 | ||
730 | if (fp->_IO_read_ptr < fp->_IO_read_end) | |
731 | return *(unsigned char *) fp->_IO_read_ptr; | |
0469311e UD |
732 | |
733 | fp->_flags |= _IO_EOF_SEEN; | |
734 | return EOF; | |
735 | } | |
736 | ||
acbee5f6 RM |
737 | static void |
738 | decide_maybe_mmap (_IO_FILE *fp) | |
739 | { | |
740 | /* We use the file in read-only mode. This could mean we can | |
741 | mmap the file and use it without any copying. But not all | |
742 | file descriptors are for mmap-able objects and on 32-bit | |
743 | machines we don't want to map files which are too large since | |
744 | this would require too much virtual memory. */ | |
745 | struct _G_stat64 st; | |
746 | ||
747 | if (_IO_SYSSTAT (fp, &st) == 0 | |
748 | && S_ISREG (st.st_mode) && st.st_size != 0 | |
749 | /* Limit the file size to 1MB for 32-bit machines. */ | |
750 | && (sizeof (ptrdiff_t) > 4 || st.st_size < 1*1024*1024) | |
751 | /* Sanity check. */ | |
752 | && (fp->_offset == _IO_pos_BAD || fp->_offset <= st.st_size)) | |
753 | { | |
754 | /* Try to map the file. */ | |
755 | void *p; | |
756 | ||
757 | # ifdef _G_MMAP64 | |
758 | p = _G_MMAP64 (NULL, st.st_size, PROT_READ, MAP_SHARED, fp->_fileno, 0); | |
759 | # else | |
760 | p = __mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, fp->_fileno, 0); | |
761 | # endif | |
762 | if (p != MAP_FAILED) | |
763 | { | |
764 | /* OK, we managed to map the file. Set the buffer up and use a | |
765 | special jump table with simplified underflow functions which | |
766 | never tries to read anything from the file. */ | |
767 | ||
768 | if ( | |
769 | # ifdef _G_LSEEK64 | |
770 | _G_LSEEK64 | |
771 | # else | |
772 | __lseek | |
773 | # endif | |
774 | (fp->_fileno, st.st_size, SEEK_SET) != st.st_size) | |
775 | { | |
776 | (void) __munmap (p, st.st_size); | |
777 | fp->_offset = _IO_pos_BAD; | |
778 | } | |
779 | else | |
780 | { | |
781 | INTUSE(_IO_setb) (fp, p, (char *) p + st.st_size, 0); | |
782 | ||
783 | if (fp->_offset == _IO_pos_BAD) | |
784 | fp->_offset = 0; | |
785 | ||
786 | _IO_setg (fp, p, p + fp->_offset, p + st.st_size); | |
787 | fp->_offset = st.st_size; | |
788 | ||
789 | if (fp->_mode <= 0) | |
790 | _IO_JUMPS ((struct _IO_FILE_plus *)fp) = &_IO_file_jumps_mmap; | |
791 | else | |
792 | _IO_JUMPS ((struct _IO_FILE_plus *)fp) = &_IO_wfile_jumps_mmap; | |
793 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_mmap; | |
794 | ||
795 | return; | |
796 | } | |
797 | } | |
798 | } | |
799 | ||
800 | /* We couldn't use mmap, so revert to the vanilla file operations. */ | |
801 | ||
802 | if (fp->_mode <= 0) | |
230491f0 | 803 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &INTUSE(_IO_file_jumps); |
acbee5f6 RM |
804 | else |
805 | _IO_JUMPS ((struct _IO_FILE_plus *) fp) = &_IO_wfile_jumps; | |
806 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; | |
807 | } | |
808 | ||
809 | int | |
810 | _IO_file_underflow_maybe_mmap (_IO_FILE *fp) | |
811 | { | |
812 | /* This is the first read attempt. Choose mmap or vanilla operations | |
813 | and then punt to the chosen underflow routine. */ | |
814 | decide_maybe_mmap (fp); | |
815 | return _IO_UNDERFLOW (fp); | |
816 | } | |
817 | ||
818 | ||
96aa2d94 | 819 | int |
b259e746 | 820 | _IO_new_file_overflow (f, ch) |
40a55d20 UD |
821 | _IO_FILE *f; |
822 | int ch; | |
96aa2d94 RM |
823 | { |
824 | if (f->_flags & _IO_NO_WRITES) /* SET ERROR */ | |
feb3c934 | 825 | { |
c131718c | 826 | f->_flags |= _IO_ERR_SEEN; |
feb3c934 UD |
827 | __set_errno (EBADF); |
828 | return EOF; | |
829 | } | |
96aa2d94 | 830 | /* If currently reading or no buffer allocated. */ |
d64b6ad0 | 831 | if ((f->_flags & _IO_CURRENTLY_PUTTING) == 0 || f->_IO_write_base == 0) |
96aa2d94 RM |
832 | { |
833 | /* Allocate a buffer if needed. */ | |
834 | if (f->_IO_write_base == 0) | |
835 | { | |
77fe0b9c | 836 | INTUSE(_IO_doallocbuf) (f); |
96aa2d94 RM |
837 | _IO_setg (f, f->_IO_buf_base, f->_IO_buf_base, f->_IO_buf_base); |
838 | } | |
c6645251 UD |
839 | /* Otherwise must be currently reading. |
840 | If _IO_read_ptr (and hence also _IO_read_end) is at the buffer end, | |
841 | logically slide the buffer forwards one block (by setting the | |
842 | read pointers to all point at the beginning of the block). This | |
843 | makes room for subsequent output. | |
844 | Otherwise, set the read pointers to _IO_read_end (leaving that | |
845 | alone, so it can continue to correspond to the external position). */ | |
846 | if (f->_IO_read_ptr == f->_IO_buf_end) | |
847 | f->_IO_read_end = f->_IO_read_ptr = f->_IO_buf_base; | |
96aa2d94 RM |
848 | f->_IO_write_ptr = f->_IO_read_ptr; |
849 | f->_IO_write_base = f->_IO_write_ptr; | |
850 | f->_IO_write_end = f->_IO_buf_end; | |
851 | f->_IO_read_base = f->_IO_read_ptr = f->_IO_read_end; | |
852 | ||
96aa2d94 | 853 | f->_flags |= _IO_CURRENTLY_PUTTING; |
076bfcf6 | 854 | if (f->_mode <= 0 && f->_flags & (_IO_LINE_BUF+_IO_UNBUFFERED)) |
bfcd44c3 | 855 | f->_IO_write_end = f->_IO_write_ptr; |
96aa2d94 RM |
856 | } |
857 | if (ch == EOF) | |
4483f2c0 RM |
858 | return INTUSE(_IO_do_write) (f, f->_IO_write_base, |
859 | f->_IO_write_ptr - f->_IO_write_base); | |
96aa2d94 | 860 | if (f->_IO_write_ptr == f->_IO_buf_end ) /* Buffer is really full */ |
40a55d20 | 861 | if (_IO_do_flush (f) == EOF) |
96aa2d94 RM |
862 | return EOF; |
863 | *f->_IO_write_ptr++ = ch; | |
864 | if ((f->_flags & _IO_UNBUFFERED) | |
865 | || ((f->_flags & _IO_LINE_BUF) && ch == '\n')) | |
4483f2c0 RM |
866 | if (INTUSE(_IO_do_write) (f, f->_IO_write_base, |
867 | f->_IO_write_ptr - f->_IO_write_base) == EOF) | |
96aa2d94 | 868 | return EOF; |
40a55d20 | 869 | return (unsigned char) ch; |
96aa2d94 | 870 | } |
77fe0b9c | 871 | INTDEF2(_IO_new_file_overflow, _IO_file_overflow) |
96aa2d94 RM |
872 | |
873 | int | |
b259e746 | 874 | _IO_new_file_sync (fp) |
40a55d20 | 875 | _IO_FILE *fp; |
96aa2d94 | 876 | { |
a2bde807 | 877 | _IO_ssize_t delta; |
61eb22d3 UD |
878 | int retval = 0; |
879 | ||
96aa2d94 RM |
880 | /* char* ptr = cur_ptr(); */ |
881 | if (fp->_IO_write_ptr > fp->_IO_write_base) | |
882 | if (_IO_do_flush(fp)) return EOF; | |
23396375 | 883 | delta = fp->_IO_read_ptr - fp->_IO_read_end; |
96aa2d94 RM |
884 | if (delta != 0) |
885 | { | |
886 | #ifdef TODO | |
40a55d20 UD |
887 | if (_IO_in_backup (fp)) |
888 | delta -= eGptr () - Gbase (); | |
96aa2d94 | 889 | #endif |
dfd2257a UD |
890 | _IO_off64_t new_pos = _IO_SYSSEEK (fp, delta, 1); |
891 | if (new_pos != (_IO_off64_t) EOF) | |
96aa2d94 RM |
892 | fp->_IO_read_end = fp->_IO_read_ptr; |
893 | #ifdef ESPIPE | |
894 | else if (errno == ESPIPE) | |
895 | ; /* Ignore error from unseekable devices. */ | |
896 | #endif | |
897 | else | |
61eb22d3 | 898 | retval = EOF; |
96aa2d94 | 899 | } |
61eb22d3 | 900 | if (retval != EOF) |
bd355af0 | 901 | fp->_offset = _IO_pos_BAD; |
96aa2d94 RM |
902 | /* FIXME: Cleanup - can this be shared? */ |
903 | /* setg(base(), ptr, ptr); */ | |
61eb22d3 | 904 | return retval; |
96aa2d94 | 905 | } |
77fe0b9c | 906 | INTDEF2(_IO_new_file_sync, _IO_file_sync) |
96aa2d94 | 907 | |
acbee5f6 RM |
908 | static int |
909 | _IO_file_sync_mmap (_IO_FILE *fp) | |
910 | { | |
911 | if (fp->_IO_read_ptr != fp->_IO_read_end) | |
912 | { | |
913 | #ifdef TODO | |
914 | if (_IO_in_backup (fp)) | |
915 | delta -= eGptr () - Gbase (); | |
916 | #endif | |
917 | if ( | |
918 | # ifdef _G_LSEEK64 | |
919 | _G_LSEEK64 | |
920 | # else | |
921 | __lseek | |
922 | # endif | |
923 | (fp->_fileno, fp->_IO_read_ptr - fp->_IO_buf_base, SEEK_SET) | |
924 | != fp->_IO_read_ptr - fp->_IO_buf_base) | |
925 | { | |
926 | fp->_flags |= _IO_ERR_SEEN; | |
927 | return EOF; | |
928 | } | |
929 | } | |
930 | fp->_offset = fp->_IO_read_ptr - fp->_IO_buf_base; | |
931 | fp->_IO_read_end = fp->_IO_read_ptr = fp->_IO_read_base; | |
932 | return 0; | |
933 | } | |
934 | ||
935 | ||
d64b6ad0 | 936 | _IO_off64_t |
b259e746 | 937 | _IO_new_file_seekoff (fp, offset, dir, mode) |
40a55d20 | 938 | _IO_FILE *fp; |
dfd2257a | 939 | _IO_off64_t offset; |
40a55d20 UD |
940 | int dir; |
941 | int mode; | |
96aa2d94 | 942 | { |
d64b6ad0 | 943 | _IO_off64_t result; |
dfd2257a | 944 | _IO_off64_t delta, new_offset; |
96aa2d94 | 945 | long count; |
feb3c934 UD |
946 | /* POSIX.1 8.2.3.7 says that after a call the fflush() the file |
947 | offset of the underlying file must be exact. */ | |
948 | int must_be_exact = (fp->_IO_read_base == fp->_IO_read_end | |
949 | && fp->_IO_write_base == fp->_IO_write_ptr); | |
96aa2d94 RM |
950 | |
951 | if (mode == 0) | |
952 | dir = _IO_seek_cur, offset = 0; /* Don't move any pointers. */ | |
953 | ||
954 | /* Flush unwritten characters. | |
955 | (This may do an unneeded write if we seek within the buffer. | |
956 | But to be able to switch to reading, we would need to set | |
957 | egptr to ptr. That can't be done in the current design, | |
958 | which assumes file_ptr() is eGptr. Anyway, since we probably | |
959 | end up flushing when we close(), it doesn't make much difference.) | |
960 | FIXME: simulate mem-papped files. */ | |
961 | ||
40a55d20 | 962 | if (fp->_IO_write_ptr > fp->_IO_write_base || _IO_in_put_mode (fp)) |
77fe0b9c | 963 | if (INTUSE(_IO_switch_to_get_mode) (fp)) |
40a55d20 | 964 | return EOF; |
96aa2d94 RM |
965 | |
966 | if (fp->_IO_buf_base == NULL) | |
967 | { | |
00bc5db0 UD |
968 | /* It could be that we already have a pushback buffer. */ |
969 | if (fp->_IO_read_base != NULL) | |
970 | { | |
971 | free (fp->_IO_read_base); | |
972 | fp->_flags &= ~_IO_IN_BACKUP; | |
973 | } | |
77fe0b9c | 974 | INTUSE(_IO_doallocbuf) (fp); |
40a55d20 UD |
975 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); |
976 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
96aa2d94 RM |
977 | } |
978 | ||
979 | switch (dir) | |
980 | { | |
981 | case _IO_seek_cur: | |
982 | /* Adjust for read-ahead (bytes is buffer). */ | |
983 | offset -= fp->_IO_read_end - fp->_IO_read_ptr; | |
bd355af0 | 984 | if (fp->_offset == _IO_pos_BAD) |
96aa2d94 RM |
985 | goto dumb; |
986 | /* Make offset absolute, assuming current pointer is file_ptr(). */ | |
d64b6ad0 | 987 | offset += fp->_offset; |
405550bf UD |
988 | if (offset < 0) |
989 | { | |
990 | __set_errno (EINVAL); | |
991 | return EOF; | |
992 | } | |
96aa2d94 RM |
993 | |
994 | dir = _IO_seek_set; | |
995 | break; | |
996 | case _IO_seek_set: | |
997 | break; | |
998 | case _IO_seek_end: | |
999 | { | |
dfd2257a | 1000 | struct _G_stat64 st; |
40a55d20 | 1001 | if (_IO_SYSSTAT (fp, &st) == 0 && S_ISREG (st.st_mode)) |
96aa2d94 RM |
1002 | { |
1003 | offset += st.st_size; | |
1004 | dir = _IO_seek_set; | |
1005 | } | |
1006 | else | |
1007 | goto dumb; | |
1008 | } | |
1009 | } | |
1010 | /* At this point, dir==_IO_seek_set. */ | |
1011 | ||
00bc5db0 UD |
1012 | /* If we are only interested in the current position we've found it now. */ |
1013 | if (mode == 0) | |
1014 | return offset; | |
1015 | ||
96aa2d94 | 1016 | /* If destination is within current buffer, optimize: */ |
bd355af0 | 1017 | if (fp->_offset != _IO_pos_BAD && fp->_IO_read_base != NULL |
96aa2d94 RM |
1018 | && !_IO_in_backup (fp)) |
1019 | { | |
1020 | /* Offset relative to start of main get area. */ | |
d64b6ad0 UD |
1021 | _IO_off64_t rel_offset = (offset - fp->_offset |
1022 | + (fp->_IO_read_end - fp->_IO_read_base)); | |
96aa2d94 RM |
1023 | if (rel_offset >= 0) |
1024 | { | |
1025 | #if 0 | |
40a55d20 UD |
1026 | if (_IO_in_backup (fp)) |
1027 | _IO_switch_to_main_get_area (fp); | |
96aa2d94 RM |
1028 | #endif |
1029 | if (rel_offset <= fp->_IO_read_end - fp->_IO_read_base) | |
1030 | { | |
40a55d20 UD |
1031 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + rel_offset, |
1032 | fp->_IO_read_end); | |
1033 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
00bc5db0 UD |
1034 | { |
1035 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
4a582094 | 1036 | goto resync; |
00bc5db0 | 1037 | } |
96aa2d94 RM |
1038 | } |
1039 | #ifdef TODO | |
1040 | /* If we have streammarkers, seek forward by reading ahead. */ | |
40a55d20 | 1041 | if (_IO_have_markers (fp)) |
96aa2d94 RM |
1042 | { |
1043 | int to_skip = rel_offset | |
1044 | - (fp->_IO_read_ptr - fp->_IO_read_base); | |
40a55d20 | 1045 | if (ignore (to_skip) != to_skip) |
96aa2d94 | 1046 | goto dumb; |
00bc5db0 | 1047 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
4a582094 | 1048 | goto resync; |
96aa2d94 RM |
1049 | } |
1050 | #endif | |
1051 | } | |
1052 | #ifdef TODO | |
40a55d20 | 1053 | if (rel_offset < 0 && rel_offset >= Bbase () - Bptr ()) |
96aa2d94 | 1054 | { |
40a55d20 UD |
1055 | if (!_IO_in_backup (fp)) |
1056 | _IO_switch_to_backup_area (fp); | |
1057 | gbump (fp->_IO_read_end + rel_offset - fp->_IO_read_ptr); | |
00bc5db0 | 1058 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
4a582094 | 1059 | goto resync; |
96aa2d94 RM |
1060 | } |
1061 | #endif | |
1062 | } | |
1063 | ||
1064 | #ifdef TODO | |
77fe0b9c | 1065 | INTUSE(_IO_unsave_markers) (fp); |
96aa2d94 RM |
1066 | #endif |
1067 | ||
1068 | if (fp->_flags & _IO_NO_READS) | |
1069 | goto dumb; | |
1070 | ||
1071 | /* Try to seek to a block boundary, to improve kernel page management. */ | |
1072 | new_offset = offset & ~(fp->_IO_buf_end - fp->_IO_buf_base - 1); | |
1073 | delta = offset - new_offset; | |
1074 | if (delta > fp->_IO_buf_end - fp->_IO_buf_base) | |
1075 | { | |
1076 | new_offset = offset; | |
1077 | delta = 0; | |
1078 | } | |
1079 | result = _IO_SYSSEEK (fp, new_offset, 0); | |
1080 | if (result < 0) | |
1081 | return EOF; | |
1082 | if (delta == 0) | |
1083 | count = 0; | |
1084 | else | |
1085 | { | |
1086 | count = _IO_SYSREAD (fp, fp->_IO_buf_base, | |
feb3c934 UD |
1087 | (must_be_exact |
1088 | ? delta : fp->_IO_buf_end - fp->_IO_buf_base)); | |
96aa2d94 RM |
1089 | if (count < delta) |
1090 | { | |
1091 | /* We weren't allowed to read, but try to seek the remainder. */ | |
1092 | offset = count == EOF ? delta : delta-count; | |
1093 | dir = _IO_seek_cur; | |
1094 | goto dumb; | |
1095 | } | |
1096 | } | |
40a55d20 UD |
1097 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + delta, |
1098 | fp->_IO_buf_base + count); | |
1099 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
bd355af0 | 1100 | fp->_offset = result + count; |
40a55d20 | 1101 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); |
96aa2d94 RM |
1102 | return offset; |
1103 | dumb: | |
1104 | ||
77fe0b9c | 1105 | INTUSE(_IO_unsave_markers) (fp); |
96aa2d94 RM |
1106 | result = _IO_SYSSEEK (fp, offset, dir); |
1107 | if (result != EOF) | |
d762684b UD |
1108 | { |
1109 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
1110 | fp->_offset = result; | |
1111 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
1112 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1113 | } | |
96aa2d94 | 1114 | return result; |
4a582094 UD |
1115 | |
1116 | resync: | |
1117 | /* We need to do it since it is possible that the file offset in | |
1118 | the kernel may be changed behind our back. It may happen when | |
1119 | we fopen a file and then do a fork. One process may access the | |
1120 | the file and the kernel file offset will be changed. */ | |
1121 | if (fp->_offset >= 0) | |
1122 | _IO_SYSSEEK (fp, fp->_offset, 0); | |
1123 | ||
1124 | return offset; | |
96aa2d94 | 1125 | } |
77fe0b9c | 1126 | INTDEF2(_IO_new_file_seekoff, _IO_file_seekoff) |
96aa2d94 | 1127 | |
284749da UD |
1128 | _IO_off64_t |
1129 | _IO_file_seekoff_mmap (fp, offset, dir, mode) | |
1130 | _IO_FILE *fp; | |
1131 | _IO_off64_t offset; | |
1132 | int dir; | |
1133 | int mode; | |
1134 | { | |
1135 | _IO_off64_t result; | |
1136 | ||
7e93f915 RM |
1137 | /* If we are only interested in the current position, calculate it and |
1138 | return right now. This calculation does the right thing when we are | |
1139 | using a pushback buffer, but in the usual case has the same value as | |
1140 | (fp->_IO_read_ptr - fp->_IO_buf_base). */ | |
284749da | 1141 | if (mode == 0) |
78ce5a3b | 1142 | return fp->_offset - (fp->_IO_read_end - fp->_IO_read_ptr); |
284749da UD |
1143 | |
1144 | switch (dir) | |
1145 | { | |
1146 | case _IO_seek_cur: | |
1147 | /* Adjust for read-ahead (bytes is buffer). */ | |
1148 | offset += fp->_IO_read_ptr - fp->_IO_read_base; | |
1149 | break; | |
1150 | case _IO_seek_set: | |
1151 | break; | |
1152 | case _IO_seek_end: | |
903b3396 | 1153 | offset += fp->_IO_buf_end - fp->_IO_buf_base; |
284749da UD |
1154 | break; |
1155 | } | |
1156 | /* At this point, dir==_IO_seek_set. */ | |
1157 | ||
1158 | if (offset < 0) | |
66bff409 UD |
1159 | { |
1160 | /* No negative offsets are valid. */ | |
1161 | __set_errno (EINVAL); | |
1162 | return EOF; | |
1163 | } | |
284749da | 1164 | |
284749da UD |
1165 | result = _IO_SYSSEEK (fp, offset, 0); |
1166 | if (result < 0) | |
1167 | return EOF; | |
1168 | ||
fc77d66a RM |
1169 | if (offset > fp->_IO_buf_end - fp->_IO_buf_base) |
1170 | /* One can fseek arbitrarily past the end of the file | |
1171 | and it is meaningless until one attempts to read. | |
1172 | Leave the buffer pointers in EOF state until underflow. */ | |
1173 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_end, fp->_IO_buf_end); | |
1174 | else | |
1175 | /* Adjust the read pointers to match the file position, | |
1176 | but so the next read attempt will call underflow. */ | |
1177 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base + offset, | |
1178 | fp->_IO_buf_base + offset); | |
1179 | ||
66bff409 | 1180 | fp->_offset = result; |
284749da UD |
1181 | |
1182 | _IO_mask_flags (fp, 0, _IO_EOF_SEEN); | |
1183 | ||
1184 | return offset; | |
1185 | } | |
1186 | ||
acbee5f6 RM |
1187 | _IO_off64_t |
1188 | _IO_file_seekoff_maybe_mmap (fp, offset, dir, mode) | |
1189 | _IO_FILE *fp; | |
1190 | _IO_off64_t offset; | |
1191 | int dir; | |
1192 | int mode; | |
1193 | { | |
1194 | /* We only get here when we haven't tried to read anything yet. | |
1195 | So there is nothing more useful for us to do here than just | |
1196 | the underlying lseek call. */ | |
1197 | ||
1198 | _IO_off64_t result = _IO_SYSSEEK (fp, offset, dir); | |
1199 | if (result < 0) | |
1200 | return EOF; | |
1201 | ||
1202 | fp->_offset = result; | |
1203 | return result; | |
1204 | } | |
1205 | ||
96aa2d94 | 1206 | _IO_ssize_t |
40a55d20 UD |
1207 | _IO_file_read (fp, buf, size) |
1208 | _IO_FILE *fp; | |
1209 | void *buf; | |
1210 | _IO_ssize_t size; | |
96aa2d94 | 1211 | { |
61eb22d3 | 1212 | return read (fp->_fileno, buf, size); |
96aa2d94 | 1213 | } |
77fe0b9c | 1214 | INTDEF(_IO_file_read) |
96aa2d94 | 1215 | |
d64b6ad0 | 1216 | _IO_off64_t |
40a55d20 UD |
1217 | _IO_file_seek (fp, offset, dir) |
1218 | _IO_FILE *fp; | |
dfd2257a | 1219 | _IO_off64_t offset; |
40a55d20 | 1220 | int dir; |
96aa2d94 | 1221 | { |
dfd2257a UD |
1222 | #ifdef _G_LSEEK64 |
1223 | return _G_LSEEK64 (fp->_fileno, offset, dir); | |
1224 | #else | |
61eb22d3 | 1225 | return lseek (fp->_fileno, offset, dir); |
dfd2257a | 1226 | #endif |
96aa2d94 | 1227 | } |
77fe0b9c | 1228 | INTDEF(_IO_file_seek) |
96aa2d94 RM |
1229 | |
1230 | int | |
40a55d20 UD |
1231 | _IO_file_stat (fp, st) |
1232 | _IO_FILE *fp; | |
1233 | void *st; | |
96aa2d94 | 1234 | { |
279eb600 | 1235 | #ifdef _G_FSTAT64 |
dfd2257a UD |
1236 | return _G_FSTAT64 (fp->_fileno, (struct _G_stat64 *) st); |
1237 | #else | |
319d719d | 1238 | return fstat (fp->_fileno, (struct stat *) st); |
dfd2257a | 1239 | #endif |
96aa2d94 | 1240 | } |
77fe0b9c | 1241 | INTDEF(_IO_file_stat) |
96aa2d94 | 1242 | |
0469311e UD |
1243 | int |
1244 | _IO_file_close_mmap (fp) | |
1245 | _IO_FILE *fp; | |
1246 | { | |
acbee5f6 RM |
1247 | /* In addition to closing the file descriptor we have to unmap the file. */ |
1248 | (void) __munmap (fp->_IO_buf_base, fp->_IO_buf_end - fp->_IO_buf_base); | |
0469311e UD |
1249 | fp->_IO_buf_base = fp->_IO_buf_end = NULL; |
1250 | return close (fp->_fileno); | |
1251 | } | |
1252 | ||
96aa2d94 | 1253 | int |
40a55d20 UD |
1254 | _IO_file_close (fp) |
1255 | _IO_FILE *fp; | |
96aa2d94 | 1256 | { |
61eb22d3 | 1257 | return close (fp->_fileno); |
96aa2d94 | 1258 | } |
77fe0b9c | 1259 | INTDEF(_IO_file_close) |
96aa2d94 RM |
1260 | |
1261 | _IO_ssize_t | |
b259e746 | 1262 | _IO_new_file_write (f, data, n) |
40a55d20 UD |
1263 | _IO_FILE *f; |
1264 | const void *data; | |
1265 | _IO_ssize_t n; | |
96aa2d94 RM |
1266 | { |
1267 | _IO_ssize_t to_do = n; | |
1268 | while (to_do > 0) | |
1269 | { | |
61eb22d3 | 1270 | _IO_ssize_t count = write (f->_fileno, data, to_do); |
d64b6ad0 | 1271 | if (count < 0) |
96aa2d94 | 1272 | { |
39e16978 UD |
1273 | f->_flags |= _IO_ERR_SEEN; |
1274 | break; | |
96aa2d94 RM |
1275 | } |
1276 | to_do -= count; | |
40a55d20 | 1277 | data = (void *) ((char *) data + count); |
96aa2d94 RM |
1278 | } |
1279 | n -= to_do; | |
bd355af0 UD |
1280 | if (f->_offset >= 0) |
1281 | f->_offset += n; | |
96aa2d94 RM |
1282 | return n; |
1283 | } | |
1284 | ||
1285 | _IO_size_t | |
b259e746 | 1286 | _IO_new_file_xsputn (f, data, n) |
40a55d20 UD |
1287 | _IO_FILE *f; |
1288 | const void *data; | |
1289 | _IO_size_t n; | |
96aa2d94 | 1290 | { |
d64b6ad0 | 1291 | register const char *s = (const char *) data; |
96aa2d94 RM |
1292 | _IO_size_t to_do = n; |
1293 | int must_flush = 0; | |
1294 | _IO_size_t count; | |
1295 | ||
1296 | if (n <= 0) | |
1297 | return 0; | |
1298 | /* This is an optimized implementation. | |
1299 | If the amount to be written straddles a block boundary | |
1300 | (or the filebuf is unbuffered), use sys_write directly. */ | |
1301 | ||
1302 | /* First figure out how much space is available in the buffer. */ | |
1303 | count = f->_IO_write_end - f->_IO_write_ptr; /* Space available. */ | |
1304 | if ((f->_flags & _IO_LINE_BUF) && (f->_flags & _IO_CURRENTLY_PUTTING)) | |
1305 | { | |
1306 | count = f->_IO_buf_end - f->_IO_write_ptr; | |
1307 | if (count >= n) | |
40a55d20 UD |
1308 | { |
1309 | register const char *p; | |
96aa2d94 RM |
1310 | for (p = s + n; p > s; ) |
1311 | { | |
40a55d20 UD |
1312 | if (*--p == '\n') |
1313 | { | |
1314 | count = p - s + 1; | |
1315 | must_flush = 1; | |
1316 | break; | |
1317 | } | |
96aa2d94 RM |
1318 | } |
1319 | } | |
1320 | } | |
1321 | /* Then fill the buffer. */ | |
1322 | if (count > 0) | |
1323 | { | |
1324 | if (count > to_do) | |
1325 | count = to_do; | |
40a55d20 UD |
1326 | if (count > 20) |
1327 | { | |
86187531 UD |
1328 | #ifdef _LIBC |
1329 | f->_IO_write_ptr = __mempcpy (f->_IO_write_ptr, s, count); | |
1330 | #else | |
40a55d20 | 1331 | memcpy (f->_IO_write_ptr, s, count); |
86187531 UD |
1332 | f->_IO_write_ptr += count; |
1333 | #endif | |
40a55d20 UD |
1334 | s += count; |
1335 | } | |
96aa2d94 RM |
1336 | else |
1337 | { | |
1338 | register char *p = f->_IO_write_ptr; | |
40a55d20 UD |
1339 | register int i = (int) count; |
1340 | while (--i >= 0) | |
1341 | *p++ = *s++; | |
86187531 | 1342 | f->_IO_write_ptr = p; |
96aa2d94 | 1343 | } |
96aa2d94 RM |
1344 | to_do -= count; |
1345 | } | |
1346 | if (to_do + must_flush > 0) | |
40a55d20 | 1347 | { |
0720f75c | 1348 | _IO_size_t block_size, do_write; |
96aa2d94 | 1349 | /* Next flush the (full) buffer. */ |
5c8d1fc0 | 1350 | if (_IO_OVERFLOW (f, EOF) == EOF) |
96aa2d94 RM |
1351 | return n - to_do; |
1352 | ||
1353 | /* Try to maintain alignment: write a whole number of blocks. | |
1354 | dont_write is what gets left over. */ | |
1355 | block_size = f->_IO_buf_end - f->_IO_buf_base; | |
0720f75c UD |
1356 | do_write = to_do - (block_size >= 128 ? to_do % block_size : 0); |
1357 | ||
1358 | if (do_write) | |
1359 | { | |
1360 | count = new_do_write (f, s, do_write); | |
1361 | to_do -= count; | |
1362 | if (count < do_write) | |
1363 | return n - to_do; | |
1364 | } | |
23396375 | 1365 | |
96aa2d94 RM |
1366 | /* Now write out the remainder. Normally, this will fit in the |
1367 | buffer, but it's somewhat messier for line-buffered files, | |
1368 | so we let _IO_default_xsputn handle the general case. */ | |
0720f75c | 1369 | if (to_do) |
77fe0b9c | 1370 | to_do -= INTUSE(_IO_default_xsputn) (f, s+do_write, to_do); |
96aa2d94 RM |
1371 | } |
1372 | return n - to_do; | |
1373 | } | |
77fe0b9c | 1374 | INTDEF2(_IO_new_file_xsputn, _IO_file_xsputn) |
96aa2d94 | 1375 | |
96aa2d94 | 1376 | _IO_size_t |
40a55d20 UD |
1377 | _IO_file_xsgetn (fp, data, n) |
1378 | _IO_FILE *fp; | |
1379 | void *data; | |
1380 | _IO_size_t n; | |
96aa2d94 | 1381 | { |
4bca4c17 UD |
1382 | register _IO_size_t want, have; |
1383 | register _IO_ssize_t count; | |
96aa2d94 | 1384 | register char *s = data; |
8fe0fd03 UD |
1385 | |
1386 | want = n; | |
1387 | ||
310f9518 UD |
1388 | if (fp->_IO_buf_base == NULL) |
1389 | { | |
1390 | /* Maybe we already have a push back pointer. */ | |
1391 | if (fp->_IO_save_base != NULL) | |
1392 | { | |
1393 | free (fp->_IO_save_base); | |
1394 | fp->_flags &= ~_IO_IN_BACKUP; | |
1395 | } | |
77fe0b9c | 1396 | INTUSE(_IO_doallocbuf) (fp); |
310f9518 UD |
1397 | } |
1398 | ||
8fe0fd03 | 1399 | while (want > 0) |
96aa2d94 | 1400 | { |
8fe0fd03 UD |
1401 | have = fp->_IO_read_end - fp->_IO_read_ptr; |
1402 | if (want <= have) | |
96aa2d94 | 1403 | { |
8fe0fd03 UD |
1404 | memcpy (s, fp->_IO_read_ptr, want); |
1405 | fp->_IO_read_ptr += want; | |
1406 | want = 0; | |
1407 | } | |
1408 | else | |
1409 | { | |
1410 | if (have > 0) | |
96aa2d94 | 1411 | { |
279eb600 UD |
1412 | #ifdef _LIBC |
1413 | s = __mempcpy (s, fp->_IO_read_ptr, have); | |
1414 | #else | |
8fe0fd03 | 1415 | memcpy (s, fp->_IO_read_ptr, have); |
8fe0fd03 | 1416 | s += have; |
279eb600 UD |
1417 | #endif |
1418 | want -= have; | |
8fe0fd03 | 1419 | fp->_IO_read_ptr += have; |
96aa2d94 | 1420 | } |
8fe0fd03 UD |
1421 | |
1422 | /* Check for backup and repeat */ | |
1423 | if (_IO_in_backup (fp)) | |
96aa2d94 | 1424 | { |
8fe0fd03 UD |
1425 | _IO_switch_to_main_get_area (fp); |
1426 | continue; | |
1427 | } | |
1428 | ||
1429 | /* If we now want less than a buffer, underflow and repeat | |
1430 | the copy. Otherwise, _IO_SYSREAD directly to | |
1431 | the user buffer. */ | |
6dd67bd5 UD |
1432 | if (fp->_IO_buf_base |
1433 | && want < (size_t) (fp->_IO_buf_end - fp->_IO_buf_base)) | |
8fe0fd03 UD |
1434 | { |
1435 | if (__underflow (fp) == EOF) | |
1436 | break; | |
1437 | ||
1438 | continue; | |
1439 | } | |
1440 | ||
4bca4c17 UD |
1441 | /* These must be set before the sysread as we might longjmp out |
1442 | waiting for input. */ | |
1443 | _IO_setg (fp, fp->_IO_buf_base, fp->_IO_buf_base, fp->_IO_buf_base); | |
1444 | _IO_setp (fp, fp->_IO_buf_base, fp->_IO_buf_base); | |
1445 | ||
279eb600 UD |
1446 | /* Try to maintain alignment: read a whole number of blocks. */ |
1447 | count = want; | |
1448 | if (fp->_IO_buf_base) | |
1449 | { | |
1450 | _IO_size_t block_size = fp->_IO_buf_end - fp->_IO_buf_base; | |
1451 | if (block_size >= 128) | |
1452 | count -= want % block_size; | |
1453 | } | |
1454 | ||
1455 | count = _IO_SYSREAD (fp, s, count); | |
96aa2d94 | 1456 | if (count <= 0) |
8fe0fd03 UD |
1457 | { |
1458 | if (count == 0) | |
1459 | fp->_flags |= _IO_EOF_SEEN; | |
1460 | else | |
1461 | fp->_flags |= _IO_ERR_SEEN; | |
1462 | ||
1463 | break; | |
1464 | } | |
23396375 | 1465 | |
96aa2d94 | 1466 | s += count; |
8fe0fd03 | 1467 | want -= count; |
4bca4c17 UD |
1468 | if (fp->_offset != _IO_pos_BAD) |
1469 | _IO_pos_adjust (fp->_offset, count); | |
96aa2d94 | 1470 | } |
96aa2d94 | 1471 | } |
8fe0fd03 UD |
1472 | |
1473 | return n - want; | |
96aa2d94 | 1474 | } |
77fe0b9c | 1475 | INTDEF(_IO_file_xsgetn) |
96aa2d94 | 1476 | |
284749da UD |
1477 | static _IO_size_t _IO_file_xsgetn_mmap __P ((_IO_FILE *, void *, _IO_size_t)); |
1478 | static _IO_size_t | |
1479 | _IO_file_xsgetn_mmap (fp, data, n) | |
1480 | _IO_FILE *fp; | |
1481 | void *data; | |
1482 | _IO_size_t n; | |
1483 | { | |
1484 | register _IO_size_t have; | |
1485 | char *read_ptr = fp->_IO_read_ptr; | |
b39d5719 | 1486 | register char *s = (char *) data; |
284749da UD |
1487 | |
1488 | have = fp->_IO_read_end - fp->_IO_read_ptr; | |
1489 | ||
1490 | if (have < n) | |
1491 | { | |
b39d5719 UD |
1492 | if (__builtin_expect (_IO_in_backup (fp), 0)) |
1493 | { | |
1494 | #ifdef _LIBC | |
1495 | s = __mempcpy (s, read_ptr, have); | |
1496 | #else | |
1497 | memcpy (s, read_ptr, have); | |
1498 | s += have; | |
1499 | #endif | |
1500 | n -= have; | |
1501 | _IO_switch_to_main_get_area (fp); | |
1502 | read_ptr = fp->_IO_read_ptr; | |
1503 | have = fp->_IO_read_end - fp->_IO_read_ptr; | |
1504 | } | |
1505 | ||
1506 | if (have < n) | |
1507 | { | |
acbee5f6 RM |
1508 | /* Check that we are mapping all of the file, in case it grew. */ |
1509 | if (__builtin_expect (mmap_remap_check (fp), 0)) | |
1510 | /* We punted mmap, so complete with the vanilla code. */ | |
1511 | return s - (char *) data + _IO_XSGETN (fp, data, n); | |
1512 | ||
1513 | read_ptr = fp->_IO_read_ptr; | |
1514 | have = fp->_IO_read_end - read_ptr; | |
b39d5719 | 1515 | } |
284749da UD |
1516 | } |
1517 | ||
c4292489 UD |
1518 | if (have < n) |
1519 | fp->_flags |= _IO_EOF_SEEN; | |
1520 | ||
1521 | if (have != 0) | |
284749da UD |
1522 | { |
1523 | have = MIN (have, n); | |
b39d5719 UD |
1524 | #ifdef _LIBC |
1525 | s = __mempcpy (s, read_ptr, have); | |
1526 | #else | |
1527 | memcpy (s, read_ptr, have); | |
1528 | s += have; | |
1529 | #endif | |
284749da UD |
1530 | fp->_IO_read_ptr = read_ptr + have; |
1531 | } | |
1532 | ||
b39d5719 | 1533 | return s - (char *) data; |
284749da UD |
1534 | } |
1535 | ||
acbee5f6 RM |
1536 | static _IO_size_t _IO_file_xsgetn_maybe_mmap __P ((_IO_FILE *, void *, |
1537 | _IO_size_t)); | |
1538 | static _IO_size_t | |
1539 | _IO_file_xsgetn_maybe_mmap (fp, data, n) | |
1540 | _IO_FILE *fp; | |
1541 | void *data; | |
1542 | _IO_size_t n; | |
1543 | { | |
1544 | /* We only get here if this is the first attempt to read something. | |
1545 | Decide which operations to use and then punt to the chosen one. */ | |
1546 | ||
1547 | decide_maybe_mmap (fp); | |
1548 | return _IO_XSGETN (fp, data, n); | |
1549 | } | |
1550 | ||
94b68ee9 | 1551 | #ifdef _LIBC |
4483f2c0 | 1552 | # undef _IO_do_write |
94b68ee9 RM |
1553 | versioned_symbol (libc, _IO_new_do_write, _IO_do_write, GLIBC_2_1); |
1554 | versioned_symbol (libc, _IO_new_file_attach, _IO_file_attach, GLIBC_2_1); | |
1555 | versioned_symbol (libc, _IO_new_file_close_it, _IO_file_close_it, GLIBC_2_1); | |
1556 | versioned_symbol (libc, _IO_new_file_finish, _IO_file_finish, GLIBC_2_1); | |
1557 | versioned_symbol (libc, _IO_new_file_fopen, _IO_file_fopen, GLIBC_2_1); | |
1558 | versioned_symbol (libc, _IO_new_file_init, _IO_file_init, GLIBC_2_1); | |
1559 | versioned_symbol (libc, _IO_new_file_setbuf, _IO_file_setbuf, GLIBC_2_1); | |
1560 | versioned_symbol (libc, _IO_new_file_sync, _IO_file_sync, GLIBC_2_1); | |
1561 | versioned_symbol (libc, _IO_new_file_overflow, _IO_file_overflow, GLIBC_2_1); | |
1562 | versioned_symbol (libc, _IO_new_file_seekoff, _IO_file_seekoff, GLIBC_2_1); | |
1563 | versioned_symbol (libc, _IO_new_file_underflow, _IO_file_underflow, GLIBC_2_1); | |
1564 | versioned_symbol (libc, _IO_new_file_write, _IO_file_write, GLIBC_2_1); | |
1565 | versioned_symbol (libc, _IO_new_file_xsputn, _IO_file_xsputn, GLIBC_2_1); | |
1566 | #endif | |
1567 | ||
40a55d20 UD |
1568 | struct _IO_jump_t _IO_file_jumps = |
1569 | { | |
96aa2d94 | 1570 | JUMP_INIT_DUMMY, |
77fe0b9c UD |
1571 | JUMP_INIT(finish, INTUSE(_IO_file_finish)), |
1572 | JUMP_INIT(overflow, INTUSE(_IO_file_overflow)), | |
1573 | JUMP_INIT(underflow, INTUSE(_IO_file_underflow)), | |
1574 | JUMP_INIT(uflow, INTUSE(_IO_default_uflow)), | |
1575 | JUMP_INIT(pbackfail, INTUSE(_IO_default_pbackfail)), | |
1576 | JUMP_INIT(xsputn, INTUSE(_IO_file_xsputn)), | |
1577 | JUMP_INIT(xsgetn, INTUSE(_IO_file_xsgetn)), | |
b259e746 | 1578 | JUMP_INIT(seekoff, _IO_new_file_seekoff), |
96aa2d94 | 1579 | JUMP_INIT(seekpos, _IO_default_seekpos), |
b259e746 UD |
1580 | JUMP_INIT(setbuf, _IO_new_file_setbuf), |
1581 | JUMP_INIT(sync, _IO_new_file_sync), | |
77fe0b9c UD |
1582 | JUMP_INIT(doallocate, INTUSE(_IO_file_doallocate)), |
1583 | JUMP_INIT(read, INTUSE(_IO_file_read)), | |
b259e746 | 1584 | JUMP_INIT(write, _IO_new_file_write), |
77fe0b9c UD |
1585 | JUMP_INIT(seek, INTUSE(_IO_file_seek)), |
1586 | JUMP_INIT(close, INTUSE(_IO_file_close)), | |
1587 | JUMP_INIT(stat, INTUSE(_IO_file_stat)), | |
dfd2257a | 1588 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
0469311e UD |
1589 | JUMP_INIT(imbue, _IO_default_imbue) |
1590 | }; | |
100351c3 | 1591 | INTVARDEF(_IO_file_jumps) |
0469311e UD |
1592 | |
1593 | struct _IO_jump_t _IO_file_jumps_mmap = | |
1594 | { | |
1595 | JUMP_INIT_DUMMY, | |
77fe0b9c UD |
1596 | JUMP_INIT(finish, INTUSE(_IO_file_finish)), |
1597 | JUMP_INIT(overflow, INTUSE(_IO_file_overflow)), | |
0469311e | 1598 | JUMP_INIT(underflow, _IO_file_underflow_mmap), |
77fe0b9c UD |
1599 | JUMP_INIT(uflow, INTUSE(_IO_default_uflow)), |
1600 | JUMP_INIT(pbackfail, INTUSE(_IO_default_pbackfail)), | |
0469311e | 1601 | JUMP_INIT(xsputn, _IO_new_file_xsputn), |
284749da UD |
1602 | JUMP_INIT(xsgetn, _IO_file_xsgetn_mmap), |
1603 | JUMP_INIT(seekoff, _IO_file_seekoff_mmap), | |
0469311e | 1604 | JUMP_INIT(seekpos, _IO_default_seekpos), |
bff334e0 | 1605 | JUMP_INIT(setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap), |
acbee5f6 | 1606 | JUMP_INIT(sync, _IO_file_sync_mmap), |
77fe0b9c UD |
1607 | JUMP_INIT(doallocate, INTUSE(_IO_file_doallocate)), |
1608 | JUMP_INIT(read, INTUSE(_IO_file_read)), | |
0469311e | 1609 | JUMP_INIT(write, _IO_new_file_write), |
77fe0b9c | 1610 | JUMP_INIT(seek, INTUSE(_IO_file_seek)), |
0469311e | 1611 | JUMP_INIT(close, _IO_file_close_mmap), |
77fe0b9c | 1612 | JUMP_INIT(stat, INTUSE(_IO_file_stat)), |
0469311e | 1613 | JUMP_INIT(showmanyc, _IO_default_showmanyc), |
acbee5f6 RM |
1614 | JUMP_INIT(imbue, _IO_default_imbue) |
1615 | }; | |
1616 | ||
1617 | struct _IO_jump_t _IO_file_jumps_maybe_mmap = | |
1618 | { | |
1619 | JUMP_INIT_DUMMY, | |
1620 | JUMP_INIT(finish, INTUSE(_IO_file_finish)), | |
1621 | JUMP_INIT(overflow, INTUSE(_IO_file_overflow)), | |
1622 | JUMP_INIT(underflow, _IO_file_underflow_maybe_mmap), | |
1623 | JUMP_INIT(uflow, INTUSE(_IO_default_uflow)), | |
1624 | JUMP_INIT(pbackfail, INTUSE(_IO_default_pbackfail)), | |
1625 | JUMP_INIT(xsputn, _IO_new_file_xsputn), | |
1626 | JUMP_INIT(xsgetn, _IO_file_xsgetn_maybe_mmap), | |
1627 | JUMP_INIT(seekoff, _IO_file_seekoff_maybe_mmap), | |
1628 | JUMP_INIT(seekpos, _IO_default_seekpos), | |
1629 | JUMP_INIT(setbuf, (_IO_setbuf_t) _IO_file_setbuf_mmap), | |
1630 | JUMP_INIT(sync, _IO_new_file_sync), | |
1631 | JUMP_INIT(doallocate, INTUSE(_IO_file_doallocate)), | |
1632 | JUMP_INIT(read, INTUSE(_IO_file_read)), | |
1633 | JUMP_INIT(write, _IO_new_file_write), | |
1634 | JUMP_INIT(seek, INTUSE(_IO_file_seek)), | |
1635 | JUMP_INIT(close, _IO_file_close), | |
1636 | JUMP_INIT(stat, INTUSE(_IO_file_stat)), | |
1637 | JUMP_INIT(showmanyc, _IO_default_showmanyc), | |
dfd2257a | 1638 | JUMP_INIT(imbue, _IO_default_imbue) |
96aa2d94 | 1639 | }; |