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afc5764c | 1 | /* Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
0f2d19dd JB |
41 | \f |
42 | ||
43 | ||
44 | #include <stdio.h> | |
0f2d19dd | 45 | #include "_scm.h" |
ee149d03 | 46 | #include "ports.h" |
1146b6cd | 47 | #include "read.h" |
20e6290e | 48 | #include "fports.h" |
1146b6cd GH |
49 | #include "unif.h" |
50 | #include "chars.h" | |
20e6290e JB |
51 | |
52 | #include "ioext.h" | |
0f2d19dd | 53 | |
ee149d03 JB |
54 | #include <fcntl.h> |
55 | ||
95b88819 GH |
56 | #ifdef HAVE_STRING_H |
57 | #include <string.h> | |
58 | #endif | |
59 | #ifdef HAVE_UNISTD_H | |
60 | #include <unistd.h> | |
61 | #endif | |
0f2d19dd JB |
62 | \f |
63 | ||
1146b6cd GH |
64 | SCM_PROC (s_read_delimited_x, "%read-delimited!", 3, 3, 0, scm_read_delimited_x); |
65 | ||
66 | SCM | |
67 | scm_read_delimited_x (delims, buf, gobble, port, start, end) | |
68 | SCM delims; | |
69 | SCM buf; | |
70 | SCM gobble; | |
71 | SCM port; | |
72 | SCM start; | |
73 | SCM end; | |
74 | { | |
75 | long j; | |
76 | char *cbuf; | |
77 | long cstart; | |
78 | long cend; | |
79 | int c; | |
80 | char *cdelims; | |
81 | int num_delims; | |
82 | ||
ae2fa5bc | 83 | SCM_ASSERT (SCM_NIMP (delims) && SCM_ROSTRINGP (delims), |
1146b6cd | 84 | delims, SCM_ARG1, s_read_delimited_x); |
ae2fa5bc GH |
85 | cdelims = SCM_ROCHARS (delims); |
86 | num_delims = SCM_ROLENGTH (delims); | |
1146b6cd GH |
87 | SCM_ASSERT (SCM_NIMP (buf) && SCM_STRINGP (buf), |
88 | buf, SCM_ARG2, s_read_delimited_x); | |
89 | cbuf = SCM_CHARS (buf); | |
90 | cend = SCM_LENGTH (buf); | |
91 | if (SCM_UNBNDP (port)) | |
92 | port = scm_cur_inp; | |
93 | else | |
94 | { | |
95 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), | |
96 | port, SCM_ARG1, s_read_delimited_x); | |
97 | } | |
98 | ||
99 | if (SCM_UNBNDP (start)) | |
100 | cstart = 0; | |
101 | else | |
102 | { | |
103 | cstart = scm_num2long (start, | |
104 | (char *) SCM_ARG5, s_read_delimited_x); | |
105 | if (cstart < 0 || cstart >= cend) | |
106 | scm_out_of_range (s_read_delimited_x, start); | |
107 | ||
108 | if (!SCM_UNBNDP (end)) | |
109 | { | |
110 | long tend = scm_num2long (end, (char *) SCM_ARG6, | |
111 | s_read_delimited_x); | |
112 | if (tend <= cstart || tend > cend) | |
113 | scm_out_of_range (s_read_delimited_x, end); | |
114 | cend = tend; | |
115 | } | |
116 | } | |
117 | ||
118 | for (j = cstart; j < cend; j++) | |
119 | { | |
120 | int k; | |
121 | ||
b7f3516f | 122 | c = scm_getc (port); |
1146b6cd GH |
123 | for (k = 0; k < num_delims; k++) |
124 | { | |
125 | if (cdelims[k] == c) | |
126 | { | |
127 | if (SCM_FALSEP (gobble)) | |
b7f3516f | 128 | scm_ungetc (c, port); |
1146b6cd GH |
129 | |
130 | return scm_cons (SCM_MAKICHR (c), | |
131 | scm_long2num (j - cstart)); | |
132 | } | |
133 | } | |
134 | if (c == EOF) | |
135 | return scm_cons (SCM_EOF_VAL, | |
136 | scm_long2num (j - cstart)); | |
137 | ||
138 | cbuf[j] = c; | |
139 | } | |
140 | return scm_cons (SCM_BOOL_F, scm_long2num (j - cstart)); | |
141 | } | |
142 | ||
ee149d03 JB |
143 | static unsigned char * |
144 | scm_do_read_line (SCM port, int *len_p) | |
145 | { | |
afc5764c | 146 | scm_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 JB |
147 | unsigned char *end; |
148 | ||
149 | /* I thought reading lines was simple. Mercy me. */ | |
150 | ||
6c951427 GH |
151 | /* The common case: the buffer contains a complete line. |
152 | This needs to be fast. */ | |
ee149d03 JB |
153 | if ((end = memchr (pt->read_pos, '\n', (pt->read_end - pt->read_pos))) |
154 | != 0) | |
155 | { | |
156 | int buf_len = (end + 1) - pt->read_pos; | |
157 | /* Allocate a buffer of the perfect size. */ | |
158 | unsigned char *buf = malloc (buf_len + 1); | |
159 | ||
160 | memcpy (buf, pt->read_pos, buf_len); | |
161 | pt->read_pos += buf_len; | |
162 | ||
163 | buf[buf_len] = '\0'; | |
164 | ||
165 | *len_p = buf_len; | |
166 | return buf; | |
167 | } | |
168 | ||
6c951427 | 169 | /* The buffer contains no newlines. */ |
ee149d03 JB |
170 | { |
171 | /* When live, len is always the number of characters in the | |
172 | current buffer that are part of the current line. */ | |
173 | int len = (pt->read_end - pt->read_pos); | |
174 | int buf_size = (len < 50) ? 60 : len * 2; | |
175 | /* Invariant: buf always has buf_size + 1 characters allocated; | |
176 | the `+ 1' is for the final '\0'. */ | |
177 | unsigned char *buf = malloc (buf_size + 1); | |
178 | int buf_len = 0; | |
ee149d03 JB |
179 | |
180 | for (;;) | |
181 | { | |
182 | if (buf_len + len > buf_size) | |
183 | { | |
184 | int new_size = (buf_len + len) * 2; | |
185 | buf = realloc (buf, new_size + 1); | |
186 | buf_size = new_size; | |
187 | } | |
188 | ||
189 | /* Copy what we've got out of the port, into our buffer. */ | |
190 | memcpy (buf + buf_len, pt->read_pos, len); | |
191 | buf_len += len; | |
192 | pt->read_pos += len; | |
193 | ||
194 | /* If we had seen a newline, we're done now. */ | |
195 | if (end) | |
196 | break; | |
197 | ||
5c070ca7 GH |
198 | /* Get more characters. */ |
199 | if (scm_fill_buffer (port) == EOF) | |
ee149d03 JB |
200 | { |
201 | /* If we're missing a final newline in the file, return | |
202 | what we did get, sans newline. */ | |
203 | if (buf_len > 0) | |
204 | break; | |
205 | ||
206 | free (buf); | |
207 | return 0; | |
208 | } | |
209 | ||
ee149d03 JB |
210 | /* Search the buffer for newlines. */ |
211 | if ((end = memchr (pt->read_pos, '\n', | |
212 | (len = (pt->read_end - pt->read_pos)))) | |
213 | != 0) | |
214 | len = (end - pt->read_pos) + 1; | |
215 | } | |
216 | ||
217 | /* I wonder how expensive this realloc is. */ | |
218 | buf = realloc (buf, buf_len + 1); | |
219 | buf[buf_len] = '\0'; | |
220 | *len_p = buf_len; | |
221 | return buf; | |
222 | } | |
223 | } | |
224 | ||
225 | ||
3e2043c4 | 226 | /* |
ee149d03 | 227 | * %read-line |
848f2a01 TP |
228 | * truncates any terminating newline from its input, and returns |
229 | * a cons of the string read and its terminating character. Doing | |
230 | * so makes it easy to implement the hairy `read-line' options | |
231 | * efficiently in Scheme. | |
3e2043c4 TP |
232 | */ |
233 | ||
3cb988bd TP |
234 | SCM_PROC (s_read_line, "%read-line", 0, 1, 0, scm_read_line); |
235 | ||
236 | SCM | |
237 | scm_read_line (port) | |
238 | SCM port; | |
239 | { | |
afc5764c | 240 | scm_port *pt; |
3cb988bd | 241 | char *s; |
848f2a01 TP |
242 | int slen; |
243 | SCM line, term; | |
3cb988bd TP |
244 | |
245 | if (SCM_UNBNDP (port)) | |
246 | port = scm_cur_inp; | |
247 | else | |
248 | { | |
249 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), | |
250 | port, SCM_ARG1, s_read_line); | |
251 | } | |
252 | ||
afc5764c JB |
253 | pt = SCM_PTAB_ENTRY (port); |
254 | if (pt->rw_active == SCM_PORT_WRITE) | |
255 | scm_ptobs[SCM_PTOBNUM (port)].fflush (port); | |
256 | ||
848f2a01 TP |
257 | s = scm_do_read_line (port, &slen); |
258 | ||
3e2043c4 | 259 | if (s == NULL) |
848f2a01 | 260 | term = line = SCM_EOF_VAL; |
3e2043c4 TP |
261 | else |
262 | { | |
848f2a01 TP |
263 | if (s[slen-1] == '\n') |
264 | { | |
265 | term = SCM_MAKICHR ('\n'); | |
ee149d03 JB |
266 | s[slen-1] = '\0'; |
267 | line = scm_take_str (s, slen-1); | |
268 | SCM_INCLINE (port); | |
848f2a01 TP |
269 | } |
270 | else | |
271 | { | |
272 | /* Fix: we should check for eof on the port before assuming this. */ | |
273 | term = SCM_EOF_VAL; | |
ee149d03 | 274 | line = scm_take_str (s, slen); |
afc5764c | 275 | SCM_COL (port) += slen; |
848f2a01 | 276 | } |
3e2043c4 | 277 | } |
848f2a01 | 278 | |
afc5764c JB |
279 | if (pt->rw_random) |
280 | pt->rw_active = SCM_PORT_READ; | |
281 | ||
848f2a01 | 282 | return scm_cons (line, term); |
3cb988bd TP |
283 | } |
284 | ||
1146b6cd GH |
285 | SCM_PROC (s_write_line, "write-line", 1, 1, 0, scm_write_line); |
286 | ||
287 | SCM | |
288 | scm_write_line (obj, port) | |
289 | SCM obj; | |
290 | SCM port; | |
291 | { | |
292 | scm_display (obj, port); | |
293 | return scm_newline (port); | |
294 | } | |
295 | ||
063e05be | 296 | SCM_PROC (s_ftell, "ftell", 1, 0, 0, scm_ftell); |
1cc91f1b | 297 | |
0f2d19dd | 298 | SCM |
6afcd3b2 GH |
299 | scm_ftell (object) |
300 | SCM object; | |
0f2d19dd | 301 | { |
afc5764c | 302 | return scm_lseek (object, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); |
ee149d03 | 303 | } |
0f2d19dd | 304 | |
063e05be | 305 | SCM_PROC (s_fseek, "fseek", 3, 0, 0, scm_fseek); |
1cc91f1b | 306 | |
0f2d19dd | 307 | SCM |
6afcd3b2 GH |
308 | scm_fseek (object, offset, whence) |
309 | SCM object; | |
0f2d19dd JB |
310 | SCM offset; |
311 | SCM whence; | |
0f2d19dd | 312 | { |
afc5764c | 313 | scm_lseek (object, offset, whence); |
78446828 | 314 | |
02b754d3 | 315 | return SCM_UNSPECIFIED; |
0f2d19dd JB |
316 | } |
317 | ||
063e05be | 318 | SCM_PROC (s_redirect_port, "redirect-port", 2, 0, 0, scm_redirect_port); |
1cc91f1b | 319 | |
0f2d19dd | 320 | SCM |
9c29ac66 GH |
321 | scm_redirect_port (old, new) |
322 | SCM old; | |
323 | SCM new; | |
0f2d19dd JB |
324 | { |
325 | int ans, oldfd, newfd; | |
ee149d03 | 326 | struct scm_fport *fp; |
9c29ac66 | 327 | |
78446828 MV |
328 | old = SCM_COERCE_OUTPORT (old); |
329 | new = SCM_COERCE_OUTPORT (new); | |
330 | ||
ee149d03 JB |
331 | SCM_ASSERT (SCM_NIMP (old) && SCM_OPFPORTP (old), old, SCM_ARG1, s_redirect_port); |
332 | SCM_ASSERT (SCM_NIMP (new) && SCM_OPFPORTP (new), new, SCM_ARG2, s_redirect_port); | |
333 | oldfd = SCM_FPORT_FDES (old); | |
334 | fp = SCM_FSTREAM (new); | |
335 | newfd = fp->fdes; | |
336 | if (oldfd != newfd) | |
337 | { | |
afc5764c JB |
338 | scm_port *pt = SCM_PTAB_ENTRY (new); |
339 | scm_port *old_pt = SCM_PTAB_ENTRY (old); | |
16019956 | 340 | scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (new)]; |
afc5764c JB |
341 | |
342 | /* must flush to old fdes. */ | |
343 | if (pt->rw_active == SCM_PORT_WRITE) | |
344 | ptob->fflush (new); | |
345 | else if (pt->rw_active == SCM_PORT_READ) | |
283a1a0e | 346 | scm_read_flush (new); |
ee149d03 JB |
347 | ans = dup2 (oldfd, newfd); |
348 | if (ans == -1) | |
349 | scm_syserror (s_redirect_port); | |
afc5764c | 350 | pt->rw_random = old_pt->rw_random; |
ee149d03 | 351 | /* continue using existing buffers, even if inappropriate. */ |
ee149d03 | 352 | } |
02b754d3 | 353 | return SCM_UNSPECIFIED; |
0f2d19dd JB |
354 | } |
355 | ||
7a6f1ffa | 356 | SCM_PROC (s_dup_to_fdes, "dup->fdes", 1, 1, 0, scm_dup_to_fdes); |
a9488d12 | 357 | SCM |
7a6f1ffa | 358 | scm_dup_to_fdes (SCM fd_or_port, SCM fd) |
a9488d12 GH |
359 | { |
360 | int oldfd, newfd, rv; | |
361 | ||
78446828 MV |
362 | fd_or_port = SCM_COERCE_OUTPORT (fd_or_port); |
363 | ||
a9488d12 GH |
364 | if (SCM_INUMP (fd_or_port)) |
365 | oldfd = SCM_INUM (fd_or_port); | |
366 | else | |
367 | { | |
ee149d03 | 368 | SCM_ASSERT (SCM_NIMP (fd_or_port) && SCM_OPFPORTP (fd_or_port), |
7a6f1ffa | 369 | fd_or_port, SCM_ARG1, s_dup_to_fdes); |
ee149d03 | 370 | oldfd = SCM_FPORT_FDES (fd_or_port); |
a9488d12 | 371 | } |
7a6f1ffa GH |
372 | |
373 | if (SCM_UNBNDP (fd)) | |
e38303a2 | 374 | { |
ee149d03 | 375 | newfd = dup (oldfd); |
7a6f1ffa | 376 | if (newfd == -1) |
468b2cf3 | 377 | scm_syserror (s_dup_to_fdes); |
7a6f1ffa GH |
378 | fd = SCM_MAKINUM (newfd); |
379 | } | |
380 | else | |
381 | { | |
382 | SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG2, s_dup_to_fdes); | |
383 | newfd = SCM_INUM (fd); | |
384 | if (oldfd != newfd) | |
385 | { | |
386 | scm_evict_ports (newfd); /* see scsh manual. */ | |
ee149d03 | 387 | rv = dup2 (oldfd, newfd); |
7a6f1ffa GH |
388 | if (rv == -1) |
389 | scm_syserror (s_dup_to_fdes); | |
390 | } | |
e38303a2 | 391 | } |
e38303a2 | 392 | return fd; |
a9488d12 GH |
393 | } |
394 | ||
063e05be | 395 | SCM_PROC (s_fileno, "fileno", 1, 0, 0, scm_fileno); |
1cc91f1b | 396 | |
0f2d19dd | 397 | SCM |
063e05be | 398 | scm_fileno (port) |
0f2d19dd | 399 | SCM port; |
0f2d19dd | 400 | { |
78446828 | 401 | port = SCM_COERCE_OUTPORT (port); |
ee149d03 JB |
402 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, |
403 | s_fileno); | |
404 | return SCM_MAKINUM (SCM_FPORT_FDES (port)); | |
0f2d19dd JB |
405 | } |
406 | ||
063e05be | 407 | SCM_PROC (s_isatty, "isatty?", 1, 0, 0, scm_isatty_p); |
1cc91f1b | 408 | |
0f2d19dd | 409 | SCM |
063e05be | 410 | scm_isatty_p (port) |
0f2d19dd | 411 | SCM port; |
0f2d19dd JB |
412 | { |
413 | int rv; | |
78446828 MV |
414 | |
415 | port = SCM_COERCE_OUTPORT (port); | |
416 | ||
10ccfad7 MD |
417 | if (!(SCM_NIMP (port) && SCM_OPFPORTP (port))) |
418 | return SCM_BOOL_F; | |
ee149d03 JB |
419 | |
420 | rv = isatty (SCM_FPORT_FDES (port)); | |
02b754d3 | 421 | return rv ? SCM_BOOL_T : SCM_BOOL_F; |
0f2d19dd JB |
422 | } |
423 | ||
424 | ||
425 | ||
063e05be | 426 | SCM_PROC (s_fdopen, "fdopen", 2, 0, 0, scm_fdopen); |
1cc91f1b | 427 | |
0f2d19dd | 428 | SCM |
063e05be | 429 | scm_fdopen (fdes, modes) |
0f2d19dd JB |
430 | SCM fdes; |
431 | SCM modes; | |
0f2d19dd | 432 | { |
0f2d19dd JB |
433 | SCM port; |
434 | ||
063e05be | 435 | SCM_ASSERT (SCM_INUMP (fdes), fdes, SCM_ARG1, s_fdopen); |
ae2fa5bc GH |
436 | SCM_ASSERT (SCM_NIMP (modes) && SCM_ROSTRINGP (modes), modes, SCM_ARG2, |
437 | s_fdopen); | |
89958ad0 | 438 | SCM_COERCE_SUBSTR (modes); |
ee149d03 | 439 | port = scm_fdes_to_port (SCM_INUM (fdes), SCM_ROCHARS (modes), SCM_BOOL_F); |
0f2d19dd JB |
440 | return port; |
441 | } | |
442 | ||
443 | ||
444 | ||
445 | /* Move a port's underlying file descriptor to a given value. | |
8b13c6b3 GH |
446 | * Returns #f if fdes is already the given value. |
447 | * #t if fdes moved. | |
0f2d19dd JB |
448 | * MOVE->FDES is implemented in Scheme and calls this primitive. |
449 | */ | |
063e05be | 450 | SCM_PROC (s_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0, scm_primitive_move_to_fdes); |
1cc91f1b | 451 | |
0f2d19dd | 452 | SCM |
063e05be | 453 | scm_primitive_move_to_fdes (port, fd) |
0f2d19dd JB |
454 | SCM port; |
455 | SCM fd; | |
0f2d19dd | 456 | { |
ee149d03 | 457 | struct scm_fport *stream; |
0f2d19dd JB |
458 | int old_fd; |
459 | int new_fd; | |
460 | int rv; | |
461 | ||
78446828 MV |
462 | port = SCM_COERCE_OUTPORT (port); |
463 | ||
063e05be GH |
464 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_primitive_move_to_fdes); |
465 | SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG2, s_primitive_move_to_fdes); | |
ee149d03 JB |
466 | stream = SCM_FSTREAM (port); |
467 | old_fd = stream->fdes; | |
0f2d19dd JB |
468 | new_fd = SCM_INUM (fd); |
469 | if (old_fd == new_fd) | |
470 | { | |
8b13c6b3 | 471 | return SCM_BOOL_F; |
0f2d19dd JB |
472 | } |
473 | scm_evict_ports (new_fd); | |
474 | rv = dup2 (old_fd, new_fd); | |
475 | if (rv == -1) | |
063e05be | 476 | scm_syserror (s_primitive_move_to_fdes); |
ee149d03 | 477 | stream->fdes = new_fd; |
0f2d19dd | 478 | SCM_SYSCALL (close (old_fd)); |
8b13c6b3 | 479 | return SCM_BOOL_T; |
0f2d19dd JB |
480 | } |
481 | ||
0f2d19dd JB |
482 | /* Return a list of ports using a given file descriptor. */ |
483 | SCM_PROC(s_fdes_to_ports, "fdes->ports", 1, 0, 0, scm_fdes_to_ports); | |
1cc91f1b | 484 | |
0f2d19dd JB |
485 | SCM |
486 | scm_fdes_to_ports (fd) | |
487 | SCM fd; | |
0f2d19dd JB |
488 | { |
489 | SCM result = SCM_EOL; | |
490 | int int_fd; | |
491 | int i; | |
492 | ||
493 | SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG1, s_fdes_to_ports); | |
494 | int_fd = SCM_INUM (fd); | |
495 | ||
0f2d19dd JB |
496 | for (i = 0; i < scm_port_table_size; i++) |
497 | { | |
ee149d03 JB |
498 | if (SCM_OPFPORTP (scm_port_table[i]->port) |
499 | && ((struct scm_fport *) scm_port_table[i]->stream)->fdes == int_fd) | |
0f2d19dd JB |
500 | result = scm_cons (scm_port_table[i]->port, result); |
501 | } | |
0f2d19dd JB |
502 | return result; |
503 | } | |
504 | ||
1cc91f1b | 505 | |
0f2d19dd JB |
506 | void |
507 | scm_init_ioext () | |
0f2d19dd | 508 | { |
0f2d19dd JB |
509 | #include "ioext.x" |
510 | } | |
511 |