Commit | Line | Data |
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1146b6cd | 1 | /* Copyright (C) 1995, 1996, 1997 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" |
1146b6cd GH |
46 | #include "genio.h" |
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 | |
95b88819 GH |
54 | #ifdef HAVE_STRING_H |
55 | #include <string.h> | |
56 | #endif | |
57 | #ifdef HAVE_UNISTD_H | |
58 | #include <unistd.h> | |
59 | #endif | |
0f2d19dd JB |
60 | \f |
61 | ||
1146b6cd GH |
62 | SCM_PROC (s_read_delimited_x, "%read-delimited!", 3, 3, 0, scm_read_delimited_x); |
63 | ||
64 | SCM | |
65 | scm_read_delimited_x (delims, buf, gobble, port, start, end) | |
66 | SCM delims; | |
67 | SCM buf; | |
68 | SCM gobble; | |
69 | SCM port; | |
70 | SCM start; | |
71 | SCM end; | |
72 | { | |
73 | long j; | |
74 | char *cbuf; | |
75 | long cstart; | |
76 | long cend; | |
77 | int c; | |
78 | char *cdelims; | |
79 | int num_delims; | |
80 | ||
ae2fa5bc | 81 | SCM_ASSERT (SCM_NIMP (delims) && SCM_ROSTRINGP (delims), |
1146b6cd | 82 | delims, SCM_ARG1, s_read_delimited_x); |
ae2fa5bc GH |
83 | cdelims = SCM_ROCHARS (delims); |
84 | num_delims = SCM_ROLENGTH (delims); | |
1146b6cd GH |
85 | SCM_ASSERT (SCM_NIMP (buf) && SCM_STRINGP (buf), |
86 | buf, SCM_ARG2, s_read_delimited_x); | |
87 | cbuf = SCM_CHARS (buf); | |
88 | cend = SCM_LENGTH (buf); | |
89 | if (SCM_UNBNDP (port)) | |
90 | port = scm_cur_inp; | |
91 | else | |
92 | { | |
93 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), | |
94 | port, SCM_ARG1, s_read_delimited_x); | |
95 | } | |
96 | ||
97 | if (SCM_UNBNDP (start)) | |
98 | cstart = 0; | |
99 | else | |
100 | { | |
101 | cstart = scm_num2long (start, | |
102 | (char *) SCM_ARG5, s_read_delimited_x); | |
103 | if (cstart < 0 || cstart >= cend) | |
104 | scm_out_of_range (s_read_delimited_x, start); | |
105 | ||
106 | if (!SCM_UNBNDP (end)) | |
107 | { | |
108 | long tend = scm_num2long (end, (char *) SCM_ARG6, | |
109 | s_read_delimited_x); | |
110 | if (tend <= cstart || tend > cend) | |
111 | scm_out_of_range (s_read_delimited_x, end); | |
112 | cend = tend; | |
113 | } | |
114 | } | |
115 | ||
116 | for (j = cstart; j < cend; j++) | |
117 | { | |
118 | int k; | |
119 | ||
b7f3516f | 120 | c = scm_getc (port); |
1146b6cd GH |
121 | for (k = 0; k < num_delims; k++) |
122 | { | |
123 | if (cdelims[k] == c) | |
124 | { | |
125 | if (SCM_FALSEP (gobble)) | |
b7f3516f | 126 | scm_ungetc (c, port); |
1146b6cd GH |
127 | |
128 | return scm_cons (SCM_MAKICHR (c), | |
129 | scm_long2num (j - cstart)); | |
130 | } | |
131 | } | |
132 | if (c == EOF) | |
133 | return scm_cons (SCM_EOF_VAL, | |
134 | scm_long2num (j - cstart)); | |
135 | ||
136 | cbuf[j] = c; | |
137 | } | |
138 | return scm_cons (SCM_BOOL_F, scm_long2num (j - cstart)); | |
139 | } | |
140 | ||
3e2043c4 | 141 | /* |
848f2a01 TP |
142 | * %read-line uses a port's fgets method for fast line i/o. It |
143 | * truncates any terminating newline from its input, and returns | |
144 | * a cons of the string read and its terminating character. Doing | |
145 | * so makes it easy to implement the hairy `read-line' options | |
146 | * efficiently in Scheme. | |
3e2043c4 TP |
147 | */ |
148 | ||
3cb988bd TP |
149 | SCM_PROC (s_read_line, "%read-line", 0, 1, 0, scm_read_line); |
150 | ||
151 | SCM | |
152 | scm_read_line (port) | |
153 | SCM port; | |
154 | { | |
155 | char *s; | |
848f2a01 TP |
156 | int slen; |
157 | SCM line, term; | |
3cb988bd TP |
158 | |
159 | if (SCM_UNBNDP (port)) | |
160 | port = scm_cur_inp; | |
161 | else | |
162 | { | |
163 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), | |
164 | port, SCM_ARG1, s_read_line); | |
165 | } | |
166 | ||
848f2a01 TP |
167 | s = scm_do_read_line (port, &slen); |
168 | ||
3e2043c4 | 169 | if (s == NULL) |
848f2a01 | 170 | term = line = SCM_EOF_VAL; |
3e2043c4 TP |
171 | else |
172 | { | |
848f2a01 TP |
173 | if (s[slen-1] == '\n') |
174 | { | |
175 | term = SCM_MAKICHR ('\n'); | |
176 | line = scm_makfromstr (s, slen-1, 0); | |
177 | } | |
178 | else | |
179 | { | |
180 | /* Fix: we should check for eof on the port before assuming this. */ | |
181 | term = SCM_EOF_VAL; | |
182 | line = scm_makfromstr (s, slen, 0); | |
183 | } | |
3e2043c4 TP |
184 | free (s); |
185 | } | |
848f2a01 TP |
186 | |
187 | return scm_cons (line, term); | |
3cb988bd TP |
188 | } |
189 | ||
1146b6cd GH |
190 | SCM_PROC (s_write_line, "write-line", 1, 1, 0, scm_write_line); |
191 | ||
192 | SCM | |
193 | scm_write_line (obj, port) | |
194 | SCM obj; | |
195 | SCM port; | |
196 | { | |
197 | scm_display (obj, port); | |
198 | return scm_newline (port); | |
199 | } | |
200 | ||
063e05be | 201 | SCM_PROC (s_ftell, "ftell", 1, 0, 0, scm_ftell); |
1cc91f1b | 202 | |
0f2d19dd | 203 | SCM |
6afcd3b2 GH |
204 | scm_ftell (object) |
205 | SCM object; | |
0f2d19dd JB |
206 | { |
207 | long pos; | |
78446828 MV |
208 | |
209 | object = SCM_COERCE_OUTPORT (object); | |
210 | ||
6afcd3b2 GH |
211 | SCM_DEFER_INTS; |
212 | if (SCM_NIMP (object) && SCM_OPFPORTP (object)) | |
213 | { | |
214 | SCM_SYSCALL (pos = ftell ((FILE *)SCM_STREAM (object))); | |
215 | if (pos > 0 && SCM_CRDYP (object)) | |
216 | pos--; | |
217 | } | |
218 | else | |
219 | { | |
220 | SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_ftell); | |
221 | SCM_SYSCALL (pos = lseek (SCM_INUM (object), 0, SEEK_CUR)); | |
222 | } | |
0f2d19dd | 223 | if (pos < 0) |
063e05be | 224 | scm_syserror (s_ftell); |
6afcd3b2 | 225 | SCM_ALLOW_INTS; |
8588fa12 | 226 | return scm_long2num (pos); |
0f2d19dd JB |
227 | } |
228 | ||
229 | ||
230 | ||
063e05be | 231 | SCM_PROC (s_fseek, "fseek", 3, 0, 0, scm_fseek); |
1cc91f1b | 232 | |
0f2d19dd | 233 | SCM |
6afcd3b2 GH |
234 | scm_fseek (object, offset, whence) |
235 | SCM object; | |
0f2d19dd JB |
236 | SCM offset; |
237 | SCM whence; | |
0f2d19dd JB |
238 | { |
239 | int rv; | |
8588fa12 GH |
240 | long loff; |
241 | ||
78446828 MV |
242 | object = SCM_COERCE_OUTPORT (object); |
243 | ||
063e05be | 244 | loff = scm_num2long (offset, (char *)SCM_ARG2, s_fseek); |
6afcd3b2 GH |
245 | SCM_ASSERT (SCM_INUMP (whence), whence, SCM_ARG3, s_fseek); |
246 | SCM_DEFER_INTS; | |
247 | if (SCM_NIMP (object) && SCM_OPFPORTP (object)) | |
248 | { | |
249 | SCM_CLRDY (object); /* Clear ungetted char */ | |
250 | rv = fseek ((FILE *)SCM_STREAM (object), loff, SCM_INUM (whence)); | |
251 | } | |
252 | else | |
253 | { | |
254 | SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_fseek); | |
255 | rv = lseek (SCM_INUM (object), loff, SCM_INUM (whence)); | |
256 | } | |
257 | if (rv < 0) | |
063e05be | 258 | scm_syserror (s_fseek); |
6afcd3b2 | 259 | SCM_ALLOW_INTS; |
02b754d3 | 260 | return SCM_UNSPECIFIED; |
0f2d19dd JB |
261 | } |
262 | ||
063e05be | 263 | SCM_PROC (s_freopen, "freopen", 3, 0, 0, scm_freopen); |
1cc91f1b | 264 | |
0f2d19dd | 265 | SCM |
063e05be | 266 | scm_freopen (filename, modes, port) |
0f2d19dd JB |
267 | SCM filename; |
268 | SCM modes; | |
269 | SCM port; | |
0f2d19dd JB |
270 | { |
271 | FILE *f; | |
ae2fa5bc GH |
272 | SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename, |
273 | SCM_ARG1, s_freopen); | |
274 | SCM_ASSERT (SCM_NIMP (modes) && SCM_ROSTRINGP (modes), modes, SCM_ARG2, | |
275 | s_freopen); | |
89958ad0 JB |
276 | |
277 | SCM_COERCE_SUBSTR (filename); | |
278 | SCM_COERCE_SUBSTR (modes); | |
78446828 | 279 | port = SCM_COERCE_OUTPORT (port); |
0f2d19dd | 280 | SCM_DEFER_INTS; |
063e05be | 281 | SCM_ASSERT (SCM_NIMP (port) && SCM_FPORTP (port), port, SCM_ARG3, s_freopen); |
ae2fa5bc GH |
282 | SCM_SYSCALL (f = freopen (SCM_ROCHARS (filename), SCM_ROCHARS (modes), |
283 | (FILE *)SCM_STREAM (port))); | |
0f2d19dd JB |
284 | if (!f) |
285 | { | |
286 | SCM p; | |
287 | p = port; | |
288 | port = SCM_MAKINUM (errno); | |
898a256f | 289 | SCM_SETAND_CAR (p, ~SCM_OPN); |
0f2d19dd JB |
290 | scm_remove_from_port_table (p); |
291 | } | |
292 | else | |
293 | { | |
ae2fa5bc | 294 | SCM_SETCAR (port, scm_tc16_fport | scm_mode_bits (SCM_ROCHARS (modes))); |
0f2d19dd | 295 | SCM_SETSTREAM (port, (SCM)f); |
ae2fa5bc | 296 | SCM_SETCAR (port, scm_tc16_fport | scm_mode_bits (SCM_ROCHARS (modes))); |
898a256f | 297 | if (SCM_BUF0 & SCM_CAR (port)) |
0f2d19dd JB |
298 | scm_setbuf0 (port); |
299 | } | |
300 | SCM_ALLOW_INTS; | |
301 | return port; | |
302 | } | |
303 | ||
063e05be | 304 | SCM_PROC (s_redirect_port, "redirect-port", 2, 0, 0, scm_redirect_port); |
1cc91f1b | 305 | |
0f2d19dd | 306 | SCM |
9c29ac66 GH |
307 | scm_redirect_port (old, new) |
308 | SCM old; | |
309 | SCM new; | |
0f2d19dd JB |
310 | { |
311 | int ans, oldfd, newfd; | |
9c29ac66 | 312 | |
78446828 MV |
313 | old = SCM_COERCE_OUTPORT (old); |
314 | new = SCM_COERCE_OUTPORT (new); | |
315 | ||
0f2d19dd | 316 | SCM_DEFER_INTS; |
9c29ac66 GH |
317 | SCM_ASSERT (SCM_NIMP (old) && SCM_OPPORTP (old), old, SCM_ARG1, s_redirect_port); |
318 | SCM_ASSERT (SCM_NIMP (new) && SCM_OPPORTP (new), new, SCM_ARG2, s_redirect_port); | |
319 | oldfd = fileno ((FILE *)SCM_STREAM (old)); | |
02b754d3 | 320 | if (oldfd == -1) |
063e05be | 321 | scm_syserror (s_redirect_port); |
9c29ac66 | 322 | newfd = fileno ((FILE *)SCM_STREAM (new)); |
02b754d3 | 323 | if (newfd == -1) |
063e05be | 324 | scm_syserror (s_redirect_port); |
02b754d3 GH |
325 | SCM_SYSCALL (ans = dup2 (oldfd, newfd)); |
326 | if (ans == -1) | |
063e05be | 327 | scm_syserror (s_redirect_port); |
0f2d19dd | 328 | SCM_ALLOW_INTS; |
02b754d3 | 329 | return SCM_UNSPECIFIED; |
0f2d19dd JB |
330 | } |
331 | ||
7a6f1ffa | 332 | SCM_PROC (s_dup_to_fdes, "dup->fdes", 1, 1, 0, scm_dup_to_fdes); |
a9488d12 | 333 | SCM |
7a6f1ffa | 334 | scm_dup_to_fdes (SCM fd_or_port, SCM fd) |
a9488d12 GH |
335 | { |
336 | int oldfd, newfd, rv; | |
337 | ||
78446828 MV |
338 | fd_or_port = SCM_COERCE_OUTPORT (fd_or_port); |
339 | ||
a9488d12 GH |
340 | SCM_DEFER_INTS; |
341 | if (SCM_INUMP (fd_or_port)) | |
342 | oldfd = SCM_INUM (fd_or_port); | |
343 | else | |
344 | { | |
345 | SCM_ASSERT (SCM_NIMP (fd_or_port) && SCM_OPPORTP (fd_or_port), | |
7a6f1ffa | 346 | fd_or_port, SCM_ARG1, s_dup_to_fdes); |
a9488d12 GH |
347 | oldfd = fileno ((FILE *)SCM_STREAM (fd_or_port)); |
348 | if (oldfd == -1) | |
7a6f1ffa | 349 | scm_syserror (s_dup_to_fdes); |
a9488d12 | 350 | } |
7a6f1ffa GH |
351 | |
352 | if (SCM_UNBNDP (fd)) | |
e38303a2 | 353 | { |
7a6f1ffa GH |
354 | SCM_SYSCALL (newfd = dup (oldfd)); |
355 | if (newfd == -1) | |
468b2cf3 | 356 | scm_syserror (s_dup_to_fdes); |
7a6f1ffa GH |
357 | fd = SCM_MAKINUM (newfd); |
358 | } | |
359 | else | |
360 | { | |
361 | SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG2, s_dup_to_fdes); | |
362 | newfd = SCM_INUM (fd); | |
363 | if (oldfd != newfd) | |
364 | { | |
365 | scm_evict_ports (newfd); /* see scsh manual. */ | |
366 | SCM_SYSCALL (rv = dup2 (oldfd, newfd)); | |
367 | if (rv == -1) | |
368 | scm_syserror (s_dup_to_fdes); | |
369 | } | |
e38303a2 | 370 | } |
a9488d12 | 371 | SCM_ALLOW_INTS; |
e38303a2 | 372 | return fd; |
a9488d12 GH |
373 | } |
374 | ||
063e05be | 375 | SCM_PROC (s_fileno, "fileno", 1, 0, 0, scm_fileno); |
1cc91f1b | 376 | |
0f2d19dd | 377 | SCM |
063e05be | 378 | scm_fileno (port) |
0f2d19dd | 379 | SCM port; |
0f2d19dd JB |
380 | { |
381 | int fd; | |
78446828 MV |
382 | |
383 | port = SCM_COERCE_OUTPORT (port); | |
384 | ||
063e05be | 385 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_fileno); |
0f2d19dd | 386 | fd = fileno ((FILE *)SCM_STREAM (port)); |
02b754d3 | 387 | if (fd == -1) |
063e05be | 388 | scm_syserror (s_fileno); |
02b754d3 | 389 | return SCM_MAKINUM (fd); |
0f2d19dd JB |
390 | } |
391 | ||
063e05be | 392 | SCM_PROC (s_isatty, "isatty?", 1, 0, 0, scm_isatty_p); |
1cc91f1b | 393 | |
0f2d19dd | 394 | SCM |
063e05be | 395 | scm_isatty_p (port) |
0f2d19dd | 396 | SCM port; |
0f2d19dd JB |
397 | { |
398 | int rv; | |
78446828 MV |
399 | |
400 | port = SCM_COERCE_OUTPORT (port); | |
401 | ||
063e05be | 402 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_isatty); |
0f2d19dd JB |
403 | rv = fileno ((FILE *)SCM_STREAM (port)); |
404 | if (rv == -1) | |
063e05be | 405 | scm_syserror (s_isatty); |
02b754d3 GH |
406 | rv = isatty (rv); |
407 | return rv ? SCM_BOOL_T : SCM_BOOL_F; | |
0f2d19dd JB |
408 | } |
409 | ||
410 | ||
411 | ||
063e05be | 412 | SCM_PROC (s_fdopen, "fdopen", 2, 0, 0, scm_fdopen); |
1cc91f1b | 413 | |
0f2d19dd | 414 | SCM |
063e05be | 415 | scm_fdopen (fdes, modes) |
0f2d19dd JB |
416 | SCM fdes; |
417 | SCM modes; | |
0f2d19dd JB |
418 | { |
419 | FILE *f; | |
420 | SCM port; | |
8b13c6b3 | 421 | struct scm_port_table * pt; |
0f2d19dd | 422 | |
063e05be | 423 | SCM_ASSERT (SCM_INUMP (fdes), fdes, SCM_ARG1, s_fdopen); |
ae2fa5bc GH |
424 | SCM_ASSERT (SCM_NIMP (modes) && SCM_ROSTRINGP (modes), modes, SCM_ARG2, |
425 | s_fdopen); | |
89958ad0 | 426 | SCM_COERCE_SUBSTR (modes); |
8b13c6b3 | 427 | SCM_NEWCELL (port); |
0f2d19dd | 428 | SCM_DEFER_INTS; |
ae2fa5bc | 429 | f = fdopen (SCM_INUM (fdes), SCM_ROCHARS (modes)); |
0f2d19dd | 430 | if (f == NULL) |
063e05be | 431 | scm_syserror (s_fdopen); |
8b13c6b3 GH |
432 | pt = scm_add_to_port_table (port); |
433 | SCM_SETPTAB_ENTRY (port, pt); | |
ae2fa5bc | 434 | SCM_SETCAR (port, scm_tc16_fport | scm_mode_bits (SCM_ROCHARS (modes))); |
e38303a2 | 435 | SCM_SETSTREAM (port, (SCM)f); |
898a256f | 436 | if (SCM_BUF0 & SCM_CAR (port)) |
8b13c6b3 | 437 | scm_setbuf0 (port); |
0f2d19dd JB |
438 | SCM_ALLOW_INTS; |
439 | return port; | |
440 | } | |
441 | ||
442 | ||
443 | ||
444 | /* Move a port's underlying file descriptor to a given value. | |
8b13c6b3 GH |
445 | * Returns #f if fdes is already the given value. |
446 | * #t if fdes moved. | |
0f2d19dd JB |
447 | * MOVE->FDES is implemented in Scheme and calls this primitive. |
448 | */ | |
063e05be | 449 | SCM_PROC (s_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0, scm_primitive_move_to_fdes); |
1cc91f1b | 450 | |
0f2d19dd | 451 | SCM |
063e05be | 452 | scm_primitive_move_to_fdes (port, fd) |
0f2d19dd JB |
453 | SCM port; |
454 | SCM fd; | |
0f2d19dd JB |
455 | { |
456 | FILE *stream; | |
457 | int old_fd; | |
458 | int new_fd; | |
459 | int rv; | |
460 | ||
78446828 MV |
461 | port = SCM_COERCE_OUTPORT (port); |
462 | ||
063e05be GH |
463 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_primitive_move_to_fdes); |
464 | SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG2, s_primitive_move_to_fdes); | |
0f2d19dd JB |
465 | SCM_DEFER_INTS; |
466 | stream = (FILE *)SCM_STREAM (port); | |
467 | old_fd = fileno (stream); | |
468 | new_fd = SCM_INUM (fd); | |
469 | if (old_fd == new_fd) | |
470 | { | |
471 | SCM_ALLOW_INTS; | |
8b13c6b3 | 472 | return SCM_BOOL_F; |
0f2d19dd JB |
473 | } |
474 | scm_evict_ports (new_fd); | |
475 | rv = dup2 (old_fd, new_fd); | |
476 | if (rv == -1) | |
063e05be | 477 | scm_syserror (s_primitive_move_to_fdes); |
0f2d19dd JB |
478 | scm_setfileno (stream, new_fd); |
479 | SCM_SYSCALL (close (old_fd)); | |
480 | SCM_ALLOW_INTS; | |
8b13c6b3 | 481 | return SCM_BOOL_T; |
0f2d19dd JB |
482 | } |
483 | ||
0f2d19dd JB |
484 | /* Return a list of ports using a given file descriptor. */ |
485 | SCM_PROC(s_fdes_to_ports, "fdes->ports", 1, 0, 0, scm_fdes_to_ports); | |
1cc91f1b | 486 | |
0f2d19dd JB |
487 | SCM |
488 | scm_fdes_to_ports (fd) | |
489 | SCM fd; | |
0f2d19dd JB |
490 | { |
491 | SCM result = SCM_EOL; | |
492 | int int_fd; | |
493 | int i; | |
494 | ||
495 | SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG1, s_fdes_to_ports); | |
496 | int_fd = SCM_INUM (fd); | |
497 | ||
498 | SCM_DEFER_INTS; | |
499 | for (i = 0; i < scm_port_table_size; i++) | |
500 | { | |
501 | if (SCM_FPORTP (scm_port_table[i]->port) | |
502 | && fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == int_fd) | |
503 | result = scm_cons (scm_port_table[i]->port, result); | |
504 | } | |
505 | SCM_ALLOW_INTS; | |
506 | return result; | |
507 | } | |
508 | ||
1cc91f1b | 509 | |
0f2d19dd JB |
510 | void |
511 | scm_init_ioext () | |
0f2d19dd JB |
512 | { |
513 | /* fseek() symbols. */ | |
514 | scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET)); | |
515 | scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR)); | |
516 | scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END)); | |
517 | ||
0f2d19dd JB |
518 | #include "ioext.x" |
519 | } | |
520 |