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840ae05d | 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 | 41 | \f |
d68fee48 JB |
42 | /* Headers. */ |
43 | ||
0f2d19dd JB |
44 | #include <stdio.h> |
45 | #include "_scm.h" | |
f12733c9 MD |
46 | #include "objects.h" |
47 | #include "smob.h" | |
20e6290e | 48 | #include "chars.h" |
0f2d19dd | 49 | |
547e65b5 | 50 | #include "keywords.h" |
20e6290e JB |
51 | |
52 | #include "ports.h" | |
0f2d19dd JB |
53 | |
54 | #ifdef HAVE_MALLOC_H | |
95b88819 | 55 | #include <malloc.h> |
0f2d19dd JB |
56 | #endif |
57 | ||
58 | #ifdef HAVE_UNISTD_H | |
59 | #include <unistd.h> | |
60 | #endif | |
61 | ||
95b88819 GH |
62 | #ifdef HAVE_SYS_IOCTL_H |
63 | #include <sys/ioctl.h> | |
64 | #endif | |
d68fee48 | 65 | |
0f2d19dd | 66 | \f |
d68fee48 | 67 | /* The port kind table --- a dynamically resized array of port types. */ |
0f2d19dd JB |
68 | |
69 | ||
70 | /* scm_ptobs scm_numptob | |
71 | * implement a dynamicly resized array of ptob records. | |
72 | * Indexes into this table are used when generating type | |
73 | * tags for smobjects (if you know a tag you can get an index and conversely). | |
74 | */ | |
f12733c9 | 75 | scm_ptob_descriptor *scm_ptobs; |
a1c95c45 | 76 | int scm_numptob; |
0f2d19dd | 77 | |
ee149d03 | 78 | /* GC marker for a port with stream of SCM type. */ |
0f2d19dd JB |
79 | SCM |
80 | scm_markstream (ptr) | |
81 | SCM ptr; | |
0f2d19dd JB |
82 | { |
83 | int openp; | |
0f2d19dd | 84 | openp = SCM_CAR (ptr) & SCM_OPN; |
0f2d19dd JB |
85 | if (openp) |
86 | return SCM_STREAM (ptr); | |
87 | else | |
88 | return SCM_BOOL_F; | |
89 | } | |
90 | ||
f12733c9 | 91 | /* |
f12733c9 | 92 | * We choose to use an interface similar to the smob interface with |
affc96b5 | 93 | * fill_input and write as standard fields, passed to the port |
f12733c9 MD |
94 | * type constructor, and optional fields set by setters. |
95 | */ | |
96 | ||
97 | static void flush_void_port (SCM port); | |
affc96b5 | 98 | static void end_input_void_port (SCM port, int offset); |
31703ab8 | 99 | static void write_void_port (SCM port, void *data, size_t size); |
0f2d19dd | 100 | |
0f2d19dd | 101 | long |
f12733c9 | 102 | scm_make_port_type (char *name, |
affc96b5 GH |
103 | int (*fill_input) (SCM port), |
104 | void (*write) (SCM port, void *data, size_t size)) | |
0f2d19dd JB |
105 | { |
106 | char *tmp; | |
107 | if (255 <= scm_numptob) | |
108 | goto ptoberr; | |
f12733c9 MD |
109 | SCM_DEFER_INTS; |
110 | SCM_SYSCALL (tmp = (char *) realloc ((char *) scm_ptobs, | |
111 | (1 + scm_numptob) | |
112 | * sizeof (scm_ptob_descriptor))); | |
0f2d19dd JB |
113 | if (tmp) |
114 | { | |
f12733c9 | 115 | scm_ptobs = (scm_ptob_descriptor *) tmp; |
affc96b5 | 116 | |
f12733c9 MD |
117 | scm_ptobs[scm_numptob].name = name; |
118 | scm_ptobs[scm_numptob].mark = 0; | |
119 | scm_ptobs[scm_numptob].free = scm_free0; | |
120 | scm_ptobs[scm_numptob].print = scm_port_print; | |
121 | scm_ptobs[scm_numptob].equalp = 0; | |
affc96b5 GH |
122 | scm_ptobs[scm_numptob].close = 0; |
123 | ||
124 | scm_ptobs[scm_numptob].write = write; | |
125 | scm_ptobs[scm_numptob].flush = flush_void_port; | |
126 | ||
127 | scm_ptobs[scm_numptob].end_input = end_input_void_port; | |
128 | scm_ptobs[scm_numptob].fill_input = fill_input; | |
129 | scm_ptobs[scm_numptob].input_waiting = 0; | |
130 | ||
f12733c9 | 131 | scm_ptobs[scm_numptob].seek = 0; |
affc96b5 GH |
132 | scm_ptobs[scm_numptob].truncate = 0; |
133 | ||
0f2d19dd JB |
134 | scm_numptob++; |
135 | } | |
f12733c9 | 136 | SCM_ALLOW_INTS; |
0f2d19dd | 137 | if (!tmp) |
f12733c9 MD |
138 | ptoberr:scm_wta (SCM_MAKINUM ((long) scm_numptob), |
139 | (char *) SCM_NALLOC, "scm_make_port_type"); | |
140 | /* Make a class object if Goops is present */ | |
141 | if (scm_port_class) | |
142 | scm_make_port_classes (scm_numptob - 1, SCM_PTOBNAME (scm_numptob - 1)); | |
0f2d19dd JB |
143 | return scm_tc7_port + (scm_numptob - 1) * 256; |
144 | } | |
145 | ||
f12733c9 | 146 | void |
6c747373 | 147 | scm_set_port_mark (long tc, SCM (*mark) (SCM)) |
f12733c9 MD |
148 | { |
149 | scm_ptobs[SCM_TC2PTOBNUM (tc)].mark = mark; | |
150 | } | |
151 | ||
152 | void | |
6c747373 | 153 | scm_set_port_free (long tc, scm_sizet (*free) (SCM)) |
f12733c9 MD |
154 | { |
155 | scm_ptobs[SCM_TC2PTOBNUM (tc)].free = free; | |
156 | } | |
157 | ||
158 | void | |
6c747373 | 159 | scm_set_port_print (long tc, int (*print) (SCM exp, SCM port, |
f12733c9 MD |
160 | scm_print_state *pstate)) |
161 | { | |
162 | scm_ptobs[SCM_TC2PTOBNUM (tc)].print = print; | |
163 | } | |
164 | ||
165 | void | |
6c747373 | 166 | scm_set_port_equalp (long tc, SCM (*equalp) (SCM, SCM)) |
f12733c9 MD |
167 | { |
168 | scm_ptobs[SCM_TC2PTOBNUM (tc)].equalp = equalp; | |
169 | } | |
170 | ||
31703ab8 | 171 | void |
affc96b5 | 172 | scm_set_port_flush (long tc, void (*flush) (SCM port)) |
31703ab8 | 173 | { |
affc96b5 | 174 | scm_ptobs[SCM_TC2PTOBNUM (tc)].flush = flush; |
31703ab8 GH |
175 | } |
176 | ||
f12733c9 | 177 | void |
affc96b5 | 178 | scm_set_port_end_input (long tc, void (*end_input) (SCM port, int offset)) |
f12733c9 | 179 | { |
affc96b5 | 180 | scm_ptobs[SCM_TC2PTOBNUM (tc)].end_input = end_input; |
f12733c9 MD |
181 | } |
182 | ||
183 | void | |
6c747373 | 184 | scm_set_port_close (long tc, int (*close) (SCM)) |
f12733c9 | 185 | { |
affc96b5 | 186 | scm_ptobs[SCM_TC2PTOBNUM (tc)].close = close; |
f12733c9 MD |
187 | } |
188 | ||
189 | void | |
6c747373 | 190 | scm_set_port_seek (long tc, off_t (*seek) (SCM port, |
f12733c9 MD |
191 | off_t OFFSET, |
192 | int WHENCE)) | |
193 | { | |
194 | scm_ptobs[SCM_TC2PTOBNUM (tc)].seek = seek; | |
195 | } | |
196 | ||
197 | void | |
6c747373 | 198 | scm_set_port_truncate (long tc, void (*truncate) (SCM port, off_t length)) |
f12733c9 | 199 | { |
affc96b5 | 200 | scm_ptobs[SCM_TC2PTOBNUM (tc)].truncate = truncate; |
f12733c9 MD |
201 | } |
202 | ||
203 | void | |
affc96b5 | 204 | scm_set_port_input_waiting (long tc, int (*input_waiting) (SCM)) |
f12733c9 | 205 | { |
affc96b5 | 206 | scm_ptobs[SCM_TC2PTOBNUM (tc)].input_waiting = input_waiting; |
f12733c9 MD |
207 | } |
208 | ||
0f2d19dd | 209 | \f |
0f2d19dd | 210 | |
44493941 | 211 | SCM_PROC(s_char_ready_p, "char-ready?", 0, 1, 0, scm_char_ready_p); |
1cc91f1b | 212 | |
0f2d19dd JB |
213 | SCM |
214 | scm_char_ready_p (port) | |
215 | SCM port; | |
0f2d19dd | 216 | { |
ae4c4016 | 217 | scm_port *pt; |
6c951427 | 218 | |
0f2d19dd JB |
219 | if (SCM_UNBNDP (port)) |
220 | port = scm_cur_inp; | |
221 | else | |
d68fee48 JB |
222 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG1, |
223 | s_char_ready_p); | |
224 | ||
ae4c4016 JB |
225 | pt = SCM_PTAB_ENTRY (port); |
226 | ||
6c951427 GH |
227 | /* if the current read buffer is filled, or the |
228 | last pushed-back char has been read and the saved buffer is | |
229 | filled, result is true. */ | |
230 | if (pt->read_pos < pt->read_end | |
231 | || (pt->read_buf == pt->putback_buf | |
232 | && pt->saved_read_pos < pt->saved_read_end)) | |
0f2d19dd | 233 | return SCM_BOOL_T; |
ee149d03 JB |
234 | else |
235 | { | |
f12733c9 | 236 | scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
ee149d03 | 237 | |
affc96b5 GH |
238 | if (ptob->input_waiting) |
239 | return (ptob->input_waiting (port)) ? SCM_BOOL_T : SCM_BOOL_F; | |
ee149d03 | 240 | else |
6c951427 | 241 | return SCM_BOOL_T; |
ee149d03 | 242 | } |
0f2d19dd | 243 | } |
0f2d19dd | 244 | |
6c951427 | 245 | /* Clear a port's read buffers, returning the contents. */ |
ee149d03 JB |
246 | SCM_PROC (s_drain_input, "drain-input", 1, 0, 0, scm_drain_input); |
247 | SCM | |
248 | scm_drain_input (SCM port) | |
249 | { | |
840ae05d JB |
250 | SCM result; |
251 | scm_port *pt = SCM_PTAB_ENTRY (port); | |
6c951427 | 252 | int count; |
840ae05d | 253 | char *dst; |
ee149d03 JB |
254 | |
255 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG1, | |
256 | s_drain_input); | |
840ae05d | 257 | |
6c951427 GH |
258 | count = pt->read_end - pt->read_pos; |
259 | if (pt->read_buf == pt->putback_buf) | |
260 | count += pt->saved_read_end - pt->saved_read_pos; | |
840ae05d | 261 | |
6c951427 GH |
262 | result = scm_makstr (count, 0); |
263 | dst = SCM_CHARS (result); | |
840ae05d JB |
264 | |
265 | while (pt->read_pos < pt->read_end) | |
6c951427 GH |
266 | *dst++ = *(pt->read_pos++); |
267 | ||
268 | if (pt->read_buf == pt->putback_buf) | |
840ae05d | 269 | { |
6c951427 GH |
270 | while (pt->saved_read_pos < pt->saved_read_end) |
271 | *dst++ = *(pt->saved_read_pos++); | |
840ae05d | 272 | } |
6c951427 | 273 | |
840ae05d | 274 | return result; |
ee149d03 | 275 | } |
0f2d19dd JB |
276 | |
277 | \f | |
d68fee48 | 278 | /* Standard ports --- current input, output, error, and more(!). */ |
0f2d19dd | 279 | |
0f2d19dd | 280 | SCM_PROC(s_current_input_port, "current-input-port", 0, 0, 0, scm_current_input_port); |
1cc91f1b | 281 | |
0f2d19dd JB |
282 | SCM |
283 | scm_current_input_port () | |
0f2d19dd JB |
284 | { |
285 | return scm_cur_inp; | |
286 | } | |
287 | ||
288 | SCM_PROC(s_current_output_port, "current-output-port", 0, 0, 0, scm_current_output_port); | |
1cc91f1b | 289 | |
0f2d19dd JB |
290 | SCM |
291 | scm_current_output_port () | |
0f2d19dd JB |
292 | { |
293 | return scm_cur_outp; | |
294 | } | |
295 | ||
296 | SCM_PROC(s_current_error_port, "current-error-port", 0, 0, 0, scm_current_error_port); | |
1cc91f1b | 297 | |
0f2d19dd JB |
298 | SCM |
299 | scm_current_error_port () | |
0f2d19dd JB |
300 | { |
301 | return scm_cur_errp; | |
302 | } | |
303 | ||
31614d8e MD |
304 | SCM_PROC(s_current_load_port, "current-load-port", 0, 0, 0, scm_current_load_port); |
305 | ||
306 | SCM | |
307 | scm_current_load_port () | |
308 | { | |
309 | return scm_cur_loadp; | |
310 | } | |
311 | ||
0f2d19dd | 312 | SCM_PROC(s_set_current_input_port, "set-current-input-port", 1, 0, 0, scm_set_current_input_port); |
1cc91f1b | 313 | |
0f2d19dd JB |
314 | SCM |
315 | scm_set_current_input_port (port) | |
316 | SCM port; | |
0f2d19dd JB |
317 | { |
318 | SCM oinp = scm_cur_inp; | |
319 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG1, s_set_current_input_port); | |
320 | scm_cur_inp = port; | |
321 | return oinp; | |
322 | } | |
323 | ||
324 | ||
325 | SCM_PROC(s_set_current_output_port, "set-current-output-port", 1, 0, 0, scm_set_current_output_port); | |
1cc91f1b | 326 | |
0f2d19dd JB |
327 | SCM |
328 | scm_set_current_output_port (port) | |
329 | SCM port; | |
0f2d19dd JB |
330 | { |
331 | SCM ooutp = scm_cur_outp; | |
78446828 | 332 | port = SCM_COERCE_OUTPORT (port); |
0f2d19dd JB |
333 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG1, s_set_current_output_port); |
334 | scm_cur_outp = port; | |
335 | return ooutp; | |
336 | } | |
337 | ||
338 | ||
339 | SCM_PROC(s_set_current_error_port, "set-current-error-port", 1, 0, 0, scm_set_current_error_port); | |
1cc91f1b | 340 | |
0f2d19dd JB |
341 | SCM |
342 | scm_set_current_error_port (port) | |
343 | SCM port; | |
0f2d19dd JB |
344 | { |
345 | SCM oerrp = scm_cur_errp; | |
78446828 | 346 | port = SCM_COERCE_OUTPORT (port); |
0f2d19dd JB |
347 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG1, s_set_current_error_port); |
348 | scm_cur_errp = port; | |
349 | return oerrp; | |
350 | } | |
351 | ||
352 | \f | |
840ae05d | 353 | /* The port table --- an array of pointers to ports. */ |
0f2d19dd | 354 | |
840ae05d | 355 | scm_port **scm_port_table; |
0f2d19dd JB |
356 | |
357 | int scm_port_table_size = 0; /* Number of ports in scm_port_table. */ | |
358 | int scm_port_table_room = 20; /* Size of the array. */ | |
359 | ||
ee149d03 | 360 | /* Add a port to the table. */ |
1cc91f1b | 361 | |
840ae05d | 362 | scm_port * |
0f2d19dd JB |
363 | scm_add_to_port_table (port) |
364 | SCM port; | |
0f2d19dd | 365 | { |
840ae05d JB |
366 | scm_port *entry; |
367 | ||
0f2d19dd JB |
368 | if (scm_port_table_size == scm_port_table_room) |
369 | { | |
ee149d03 | 370 | void *newt = realloc ((char *) scm_port_table, |
840ae05d | 371 | (scm_sizet) (sizeof (scm_port *) |
ee149d03 JB |
372 | * scm_port_table_room * 2)); |
373 | if (newt == NULL) | |
840ae05d JB |
374 | scm_memory_error ("scm_add_to_port_table"); |
375 | scm_port_table = (scm_port **) newt; | |
0f2d19dd JB |
376 | scm_port_table_room *= 2; |
377 | } | |
840ae05d JB |
378 | entry = (scm_port *) malloc (sizeof (scm_port)); |
379 | if (entry == NULL) | |
380 | scm_memory_error ("scm_add_to_port_table"); | |
381 | ||
382 | entry->port = port; | |
383 | entry->entry = scm_port_table_size; | |
384 | entry->revealed = 0; | |
385 | entry->stream = 0; | |
386 | entry->file_name = SCM_BOOL_F; | |
387 | entry->line_number = 0; | |
388 | entry->column_number = 0; | |
6c951427 GH |
389 | entry->putback_buf = 0; |
390 | entry->putback_buf_size = 0; | |
61e452ba | 391 | entry->rw_active = SCM_PORT_NEITHER; |
840ae05d JB |
392 | |
393 | scm_port_table[scm_port_table_size] = entry; | |
394 | scm_port_table_size++; | |
395 | ||
396 | return entry; | |
0f2d19dd JB |
397 | } |
398 | ||
6c951427 | 399 | /* Remove a port from the table and destroy it. */ |
1cc91f1b | 400 | |
0f2d19dd JB |
401 | void |
402 | scm_remove_from_port_table (port) | |
403 | SCM port; | |
0f2d19dd | 404 | { |
840ae05d | 405 | scm_port *p = SCM_PTAB_ENTRY (port); |
ee1e7e13 | 406 | int i = p->entry; |
6c951427 | 407 | |
ee1e7e13 MD |
408 | if (i >= scm_port_table_size) |
409 | scm_wta (port, "Port not in table", "scm_remove_from_port_table"); | |
6c951427 GH |
410 | if (p->putback_buf) |
411 | free (p->putback_buf); | |
840ae05d | 412 | free (p); |
ee1e7e13 MD |
413 | /* Since we have just freed slot i we can shrink the table by moving |
414 | the last entry to that slot... */ | |
415 | if (i < scm_port_table_size - 1) | |
0f2d19dd | 416 | { |
ee1e7e13 MD |
417 | scm_port_table[i] = scm_port_table[scm_port_table_size - 1]; |
418 | scm_port_table[i]->entry = i; | |
0f2d19dd | 419 | } |
0f2d19dd JB |
420 | SCM_SETPTAB_ENTRY (port, 0); |
421 | scm_port_table_size--; | |
422 | } | |
423 | ||
fea6b4ea | 424 | #ifdef GUILE_DEBUG |
0f2d19dd JB |
425 | /* Undocumented functions for debugging. */ |
426 | /* Return the number of ports in the table. */ | |
1cc91f1b | 427 | |
1146b6cd | 428 | SCM_PROC(s_pt_size, "pt-size", 0, 0, 0, scm_pt_size); |
0f2d19dd JB |
429 | SCM |
430 | scm_pt_size () | |
0f2d19dd JB |
431 | { |
432 | return SCM_MAKINUM (scm_port_table_size); | |
433 | } | |
434 | ||
435 | /* Return the ith member of the port table. */ | |
1146b6cd | 436 | SCM_PROC(s_pt_member, "pt-member", 1, 0, 0, scm_pt_member); |
0f2d19dd JB |
437 | SCM |
438 | scm_pt_member (member) | |
439 | SCM member; | |
0f2d19dd JB |
440 | { |
441 | int i; | |
442 | SCM_ASSERT (SCM_INUMP (member), member, SCM_ARG1, s_pt_member); | |
443 | i = SCM_INUM (member); | |
444 | if (i < 0 || i >= scm_port_table_size) | |
445 | return SCM_BOOL_F; | |
446 | else | |
447 | return scm_port_table[i]->port; | |
448 | } | |
449 | #endif | |
450 | ||
451 | ||
d68fee48 JB |
452 | \f |
453 | /* Revealed counts --- an oddity inherited from SCSH. */ | |
454 | ||
8b13c6b3 GH |
455 | /* Find a port in the table and return its revealed count. |
456 | Also used by the garbage collector. | |
0f2d19dd | 457 | */ |
1cc91f1b | 458 | |
0f2d19dd JB |
459 | int |
460 | scm_revealed_count (port) | |
461 | SCM port; | |
0f2d19dd JB |
462 | { |
463 | return SCM_REVEALED(port); | |
464 | } | |
465 | ||
466 | ||
467 | ||
468 | /* Return the revealed count for a port. */ | |
469 | ||
470 | SCM_PROC(s_port_revealed, "port-revealed", 1, 0, 0, scm_port_revealed); | |
1cc91f1b | 471 | |
0f2d19dd JB |
472 | SCM |
473 | scm_port_revealed (port) | |
474 | SCM port; | |
0f2d19dd | 475 | { |
78446828 | 476 | port = SCM_COERCE_OUTPORT (port); |
0f2d19dd | 477 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port), port, SCM_ARG1, s_port_revealed); |
8b13c6b3 | 478 | return SCM_MAKINUM (scm_revealed_count (port)); |
0f2d19dd JB |
479 | } |
480 | ||
481 | /* Set the revealed count for a port. */ | |
482 | SCM_PROC(s_set_port_revealed_x, "set-port-revealed!", 2, 0, 0, scm_set_port_revealed_x); | |
1cc91f1b | 483 | |
0f2d19dd JB |
484 | SCM |
485 | scm_set_port_revealed_x (port, rcount) | |
486 | SCM port; | |
487 | SCM rcount; | |
0f2d19dd | 488 | { |
78446828 | 489 | port = SCM_COERCE_OUTPORT (port); |
0f2d19dd JB |
490 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port), port, SCM_ARG1, s_set_port_revealed_x); |
491 | SCM_ASSERT (SCM_INUMP (rcount), rcount, SCM_ARG2, s_set_port_revealed_x); | |
0f2d19dd | 492 | SCM_REVEALED (port) = SCM_INUM (rcount); |
8b13c6b3 | 493 | return SCM_UNSPECIFIED; |
0f2d19dd JB |
494 | } |
495 | ||
d68fee48 JB |
496 | |
497 | \f | |
498 | /* Retrieving a port's mode. */ | |
499 | ||
eadd48de GH |
500 | /* Return the flags that characterize a port based on the mode |
501 | * string used to open a file for that port. | |
502 | * | |
503 | * See PORT FLAGS in scm.h | |
504 | */ | |
505 | ||
506 | long | |
507 | scm_mode_bits (modes) | |
508 | char *modes; | |
509 | { | |
510 | return (SCM_OPN | |
511 | | (strchr (modes, 'r') || strchr (modes, '+') ? SCM_RDNG : 0) | |
512 | | ( strchr (modes, 'w') | |
513 | || strchr (modes, 'a') | |
514 | || strchr (modes, '+') ? SCM_WRTNG : 0) | |
ee149d03 JB |
515 | | (strchr (modes, '0') ? SCM_BUF0 : 0) |
516 | | (strchr (modes, 'l') ? SCM_BUFLINE : 0)); | |
eadd48de GH |
517 | } |
518 | ||
519 | ||
520 | /* Return the mode flags from an open port. | |
521 | * Some modes such as "append" are only used when opening | |
522 | * a file and are not returned here. */ | |
523 | ||
524 | SCM_PROC(s_port_mode, "port-mode", 1, 0, 0, scm_port_mode); | |
525 | ||
526 | SCM | |
527 | scm_port_mode (port) | |
528 | SCM port; | |
529 | { | |
530 | char modes[3]; | |
531 | modes[0] = '\0'; | |
78446828 MV |
532 | |
533 | port = SCM_COERCE_OUTPORT (port); | |
eadd48de GH |
534 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPPORTP (port), port, SCM_ARG1, s_port_mode); |
535 | if (SCM_CAR (port) & SCM_RDNG) { | |
536 | if (SCM_CAR (port) & SCM_WRTNG) | |
537 | strcpy (modes, "r+"); | |
538 | else | |
539 | strcpy (modes, "r"); | |
540 | } | |
541 | else if (SCM_CAR (port) & SCM_WRTNG) | |
542 | strcpy (modes, "w"); | |
543 | if (SCM_CAR (port) & SCM_BUF0) | |
544 | strcat (modes, "0"); | |
545 | return scm_makfromstr (modes, strlen (modes), 0); | |
546 | } | |
547 | ||
548 | ||
d68fee48 JB |
549 | \f |
550 | /* Closing ports. */ | |
551 | ||
0f2d19dd JB |
552 | /* scm_close_port |
553 | * Call the close operation on a port object. | |
eadd48de | 554 | * see also scm_close. |
0f2d19dd JB |
555 | */ |
556 | SCM_PROC(s_close_port, "close-port", 1, 0, 0, scm_close_port); | |
1cc91f1b | 557 | |
0f2d19dd JB |
558 | SCM |
559 | scm_close_port (port) | |
560 | SCM port; | |
0f2d19dd JB |
561 | { |
562 | scm_sizet i; | |
eadd48de GH |
563 | int rv; |
564 | ||
78446828 MV |
565 | port = SCM_COERCE_OUTPORT (port); |
566 | ||
341eaef0 | 567 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port), port, SCM_ARG1, |
3c1750f3 | 568 | s_close_port); |
0f2d19dd | 569 | if (SCM_CLOSEDP (port)) |
eadd48de | 570 | return SCM_BOOL_F; |
0f2d19dd | 571 | i = SCM_PTOBNUM (port); |
affc96b5 GH |
572 | if (scm_ptobs[i].close) |
573 | rv = (scm_ptobs[i].close) (port); | |
eadd48de GH |
574 | else |
575 | rv = 0; | |
0f2d19dd | 576 | scm_remove_from_port_table (port); |
898a256f | 577 | SCM_SETAND_CAR (port, ~SCM_OPN); |
eadd48de | 578 | return (rv < 0) ? SCM_BOOL_F : SCM_BOOL_T; |
0f2d19dd JB |
579 | } |
580 | ||
581 | SCM_PROC(s_close_all_ports_except, "close-all-ports-except", 0, 0, 1, scm_close_all_ports_except); | |
1cc91f1b | 582 | |
0f2d19dd JB |
583 | SCM |
584 | scm_close_all_ports_except (ports) | |
585 | SCM ports; | |
0f2d19dd JB |
586 | { |
587 | int i = 0; | |
588 | SCM_ASSERT (SCM_NIMP (ports) && SCM_CONSP (ports), ports, SCM_ARG1, s_close_all_ports_except); | |
0f2d19dd JB |
589 | while (i < scm_port_table_size) |
590 | { | |
591 | SCM thisport = scm_port_table[i]->port; | |
592 | int found = 0; | |
593 | SCM ports_ptr = ports; | |
594 | ||
595 | while (SCM_NNULLP (ports_ptr)) | |
596 | { | |
78446828 | 597 | SCM port = SCM_COERCE_OUTPORT (SCM_CAR (ports_ptr)); |
0f2d19dd JB |
598 | if (i == 0) |
599 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPPORTP (port), port, SCM_ARG1, s_close_all_ports_except); | |
600 | if (port == thisport) | |
601 | found = 1; | |
602 | ports_ptr = SCM_CDR (ports_ptr); | |
603 | } | |
604 | if (found) | |
605 | i++; | |
606 | else | |
607 | /* i is not to be incremented here. */ | |
608 | scm_close_port (thisport); | |
609 | } | |
0f2d19dd JB |
610 | return SCM_UNSPECIFIED; |
611 | } | |
612 | ||
d68fee48 JB |
613 | |
614 | \f | |
615 | /* Utter miscellany. Gosh, we should clean this up some time. */ | |
616 | ||
0f2d19dd | 617 | SCM_PROC(s_input_port_p, "input-port?", 1, 0, 0, scm_input_port_p); |
1cc91f1b | 618 | |
0f2d19dd JB |
619 | SCM |
620 | scm_input_port_p (x) | |
621 | SCM x; | |
0f2d19dd JB |
622 | { |
623 | if (SCM_IMP (x)) | |
4a94d8ca | 624 | return SCM_BOOL_F; |
0f2d19dd JB |
625 | return SCM_INPORTP (x) ? SCM_BOOL_T : SCM_BOOL_F; |
626 | } | |
627 | ||
628 | SCM_PROC(s_output_port_p, "output-port?", 1, 0, 0, scm_output_port_p); | |
1cc91f1b | 629 | |
0f2d19dd JB |
630 | SCM |
631 | scm_output_port_p (x) | |
632 | SCM x; | |
0f2d19dd JB |
633 | { |
634 | if (SCM_IMP (x)) | |
4a94d8ca MD |
635 | return SCM_BOOL_F; |
636 | if (SCM_PORT_WITH_PS_P (x)) | |
637 | x = SCM_PORT_WITH_PS_PORT (x); | |
0f2d19dd JB |
638 | return SCM_OUTPORTP (x) ? SCM_BOOL_T : SCM_BOOL_F; |
639 | } | |
640 | ||
641 | ||
642 | SCM_PROC(s_eof_object_p, "eof-object?", 1, 0, 0, scm_eof_object_p); | |
1cc91f1b | 643 | |
0f2d19dd JB |
644 | SCM |
645 | scm_eof_object_p (x) | |
646 | SCM x; | |
0f2d19dd | 647 | { |
0c32d76c | 648 | return SCM_EOF_OBJECT_P (x) ? SCM_BOOL_T : SCM_BOOL_F; |
0f2d19dd JB |
649 | } |
650 | ||
651 | SCM_PROC(s_force_output, "force-output", 0, 1, 0, scm_force_output); | |
1cc91f1b | 652 | |
0f2d19dd JB |
653 | SCM |
654 | scm_force_output (port) | |
655 | SCM port; | |
0f2d19dd JB |
656 | { |
657 | if (SCM_UNBNDP (port)) | |
3e877d15 | 658 | port = scm_cur_outp; |
0f2d19dd | 659 | else |
78446828 MV |
660 | { |
661 | port = SCM_COERCE_OUTPORT (port); | |
3e877d15 JB |
662 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG1, |
663 | s_force_output); | |
78446828 | 664 | } |
affc96b5 | 665 | scm_flush (port); |
ee149d03 | 666 | return SCM_UNSPECIFIED; |
0f2d19dd JB |
667 | } |
668 | ||
9c29ac66 | 669 | SCM_PROC (s_flush_all_ports, "flush-all-ports", 0, 0, 0, scm_flush_all_ports); |
89ea5b7c GH |
670 | SCM |
671 | scm_flush_all_ports (void) | |
672 | { | |
673 | int i; | |
674 | ||
675 | for (i = 0; i < scm_port_table_size; i++) | |
676 | { | |
ee149d03 | 677 | if (SCM_OPOUTPORTP (scm_port_table[i]->port)) |
affc96b5 | 678 | scm_flush (scm_port_table[i]->port); |
89ea5b7c GH |
679 | } |
680 | return SCM_UNSPECIFIED; | |
681 | } | |
0f2d19dd JB |
682 | |
683 | SCM_PROC(s_read_char, "read-char", 0, 1, 0, scm_read_char); | |
1cc91f1b | 684 | |
0f2d19dd JB |
685 | SCM |
686 | scm_read_char (port) | |
687 | SCM port; | |
0f2d19dd JB |
688 | { |
689 | int c; | |
690 | if (SCM_UNBNDP (port)) | |
334341aa | 691 | port = scm_cur_inp; |
0f2d19dd JB |
692 | else |
693 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG1, s_read_char); | |
b7f3516f | 694 | c = scm_getc (port); |
0f2d19dd JB |
695 | if (EOF == c) |
696 | return SCM_EOF_VAL; | |
697 | return SCM_MAKICHR (c); | |
698 | } | |
699 | ||
5c070ca7 | 700 | /* this should only be called when the read buffer is empty. it |
affc96b5 | 701 | tries to refill the read buffer. it returns the first char from |
5c070ca7 | 702 | the port, which is either EOF or *(pt->read_pos). */ |
6c951427 | 703 | int |
affc96b5 | 704 | scm_fill_input (SCM port) |
6c951427 | 705 | { |
283a1a0e GH |
706 | scm_port *pt = SCM_PTAB_ENTRY (port); |
707 | ||
6c951427 GH |
708 | if (pt->read_buf == pt->putback_buf) |
709 | { | |
710 | /* finished reading put-back chars. */ | |
711 | pt->read_buf = pt->saved_read_buf; | |
712 | pt->read_pos = pt->saved_read_pos; | |
713 | pt->read_end = pt->saved_read_end; | |
714 | pt->read_buf_size = pt->saved_read_buf_size; | |
715 | if (pt->read_pos < pt->read_end) | |
5c070ca7 | 716 | return *(pt->read_pos); |
6c951427 | 717 | } |
affc96b5 | 718 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
6c951427 GH |
719 | } |
720 | ||
ee149d03 JB |
721 | int |
722 | scm_getc (port) | |
0f2d19dd | 723 | SCM port; |
0f2d19dd JB |
724 | { |
725 | int c; | |
840ae05d | 726 | scm_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 | 727 | |
840ae05d JB |
728 | if (pt->rw_active == SCM_PORT_WRITE) |
729 | { | |
affc96b5 GH |
730 | /* may be marginally faster than calling scm_flush. */ |
731 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
840ae05d | 732 | } |
6c951427 | 733 | |
5c070ca7 GH |
734 | if (pt->rw_random) |
735 | pt->rw_active = SCM_PORT_READ; | |
736 | ||
737 | if (pt->read_pos >= pt->read_end) | |
ee149d03 | 738 | { |
affc96b5 | 739 | if (scm_fill_input (port) == EOF) |
5c070ca7 | 740 | return EOF; |
ee149d03 JB |
741 | } |
742 | ||
5c070ca7 | 743 | c = *(pt->read_pos++); |
840ae05d | 744 | |
ee149d03 JB |
745 | if (c == '\n') |
746 | { | |
747 | SCM_INCLINE (port); | |
748 | } | |
749 | else if (c == '\t') | |
750 | { | |
751 | SCM_TABCOL (port); | |
752 | } | |
753 | else | |
754 | { | |
755 | SCM_INCCOL (port); | |
756 | } | |
757 | ||
758 | return c; | |
0f2d19dd JB |
759 | } |
760 | ||
ee149d03 JB |
761 | void |
762 | scm_putc (c, port) | |
265e6a4d | 763 | char c; |
ee149d03 JB |
764 | SCM port; |
765 | { | |
265e6a4d | 766 | scm_lfwrite (&c, 1, port); |
ee149d03 | 767 | } |
3cb988bd | 768 | |
ee149d03 JB |
769 | void |
770 | scm_puts (s, port) | |
771 | char *s; | |
3cb988bd TP |
772 | SCM port; |
773 | { | |
265e6a4d | 774 | scm_lfwrite (s, strlen (s), port); |
ee149d03 | 775 | } |
3cb988bd | 776 | |
ee149d03 JB |
777 | void |
778 | scm_lfwrite (ptr, size, port) | |
779 | char *ptr; | |
780 | scm_sizet size; | |
781 | SCM port; | |
782 | { | |
840ae05d | 783 | scm_port *pt = SCM_PTAB_ENTRY (port); |
f12733c9 | 784 | scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
3e2043c4 | 785 | |
840ae05d | 786 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 787 | scm_end_input (port); |
283a1a0e | 788 | |
31703ab8 | 789 | ptob->write (port, ptr, size); |
840ae05d JB |
790 | |
791 | if (pt->rw_random) | |
792 | pt->rw_active = SCM_PORT_WRITE; | |
ee149d03 | 793 | } |
3cb988bd | 794 | |
3cb988bd | 795 | |
ee149d03 | 796 | void |
affc96b5 | 797 | scm_flush (port) |
ee149d03 JB |
798 | SCM port; |
799 | { | |
800 | scm_sizet i = SCM_PTOBNUM (port); | |
affc96b5 | 801 | (scm_ptobs[i].flush) (port); |
ee149d03 JB |
802 | } |
803 | ||
283a1a0e | 804 | void |
affc96b5 | 805 | scm_end_input (port) |
283a1a0e GH |
806 | SCM port; |
807 | { | |
808 | int offset; | |
809 | scm_port *pt = SCM_PTAB_ENTRY (port); | |
810 | ||
811 | if (pt->read_buf == pt->putback_buf) | |
812 | { | |
813 | offset = pt->read_end - pt->read_pos; | |
814 | pt->read_buf = pt->saved_read_buf; | |
815 | pt->read_pos = pt->saved_read_pos; | |
816 | pt->read_end = pt->saved_read_end; | |
817 | pt->read_buf_size = pt->saved_read_buf_size; | |
818 | } | |
819 | else | |
820 | offset = 0; | |
821 | ||
affc96b5 | 822 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
283a1a0e GH |
823 | } |
824 | ||
ee149d03 JB |
825 | \f |
826 | ||
827 | ||
828 | void | |
829 | scm_ungetc (c, port) | |
830 | int c; | |
831 | SCM port; | |
832 | { | |
840ae05d JB |
833 | scm_port *pt = SCM_PTAB_ENTRY (port); |
834 | ||
6c951427 GH |
835 | if (pt->read_buf == pt->putback_buf) |
836 | /* already using the put-back buffer. */ | |
837 | { | |
838 | /* enlarge putback_buf if necessary. */ | |
839 | if (pt->read_end == pt->read_buf + pt->read_buf_size | |
840 | && pt->read_buf == pt->read_pos) | |
841 | { | |
842 | int new_size = pt->read_buf_size * 2; | |
843 | unsigned char *tmp = | |
844 | (unsigned char *) realloc (pt->putback_buf, new_size); | |
845 | ||
846 | if (tmp == NULL) | |
847 | scm_memory_error ("scm_ungetc"); | |
848 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; | |
849 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
850 | pt->read_buf_size = pt->putback_buf_size = new_size; | |
851 | } | |
852 | ||
853 | /* shift any existing bytes to buffer + 1. */ | |
854 | if (pt->read_pos == pt->read_end) | |
855 | pt->read_end = pt->read_buf + 1; | |
856 | else if (pt->read_pos != pt->read_buf + 1) | |
857 | { | |
858 | int count = pt->read_end - pt->read_pos; | |
859 | ||
860 | memmove (pt->read_buf + 1, pt->read_pos, count); | |
861 | pt->read_end = pt->read_buf + 1 + count; | |
862 | } | |
863 | ||
864 | pt->read_pos = pt->read_buf; | |
865 | } | |
866 | else | |
867 | /* switch to the put-back buffer. */ | |
868 | { | |
869 | if (pt->putback_buf == NULL) | |
870 | { | |
6e2e75db | 871 | pt->putback_buf = (char *) malloc (SCM_INITIAL_PUTBACK_BUF_SIZE); |
6c951427 GH |
872 | if (pt->putback_buf == NULL) |
873 | scm_memory_error ("scm_ungetc"); | |
874 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; | |
875 | } | |
876 | ||
877 | pt->saved_read_buf = pt->read_buf; | |
878 | pt->saved_read_pos = pt->read_pos; | |
879 | pt->saved_read_end = pt->read_end; | |
880 | pt->saved_read_buf_size = pt->read_buf_size; | |
881 | ||
882 | pt->read_pos = pt->read_buf = pt->putback_buf; | |
883 | pt->read_end = pt->read_buf + 1; | |
884 | pt->read_buf_size = pt->putback_buf_size; | |
885 | } | |
886 | ||
887 | *pt->read_buf = c; | |
ee149d03 | 888 | |
840ae05d JB |
889 | if (pt->rw_random) |
890 | pt->rw_active = SCM_PORT_READ; | |
891 | ||
ee149d03 JB |
892 | if (c == '\n') |
893 | { | |
894 | /* What should col be in this case? | |
895 | * We'll leave it at -1. | |
896 | */ | |
897 | SCM_LINUM (port) -= 1; | |
898 | } | |
899 | else | |
900 | SCM_COL(port) -= 1; | |
901 | } | |
902 | ||
903 | ||
904 | void | |
905 | scm_ungets (s, n, port) | |
906 | char *s; | |
907 | int n; | |
908 | SCM port; | |
909 | { | |
910 | /* This is simple minded and inefficient, but unreading strings is | |
911 | * probably not a common operation, and remember that line and | |
912 | * column numbers have to be handled... | |
913 | * | |
914 | * Please feel free to write an optimized version! | |
915 | */ | |
916 | while (n--) | |
917 | scm_ungetc (s[n], port); | |
918 | } | |
919 | ||
920 | ||
921 | SCM_PROC(s_peek_char, "peek-char", 0, 1, 0, scm_peek_char); | |
922 | ||
923 | SCM | |
924 | scm_peek_char (port) | |
925 | SCM port; | |
926 | { | |
927 | int c; | |
928 | if (SCM_UNBNDP (port)) | |
929 | port = scm_cur_inp; | |
930 | else | |
931 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG1, s_peek_char); | |
932 | c = scm_getc (port); | |
933 | if (EOF == c) | |
934 | return SCM_EOF_VAL; | |
935 | scm_ungetc (c, port); | |
936 | return SCM_MAKICHR (c); | |
3cb988bd TP |
937 | } |
938 | ||
0f2d19dd | 939 | SCM_PROC (s_unread_char, "unread-char", 2, 0, 0, scm_unread_char); |
1cc91f1b | 940 | |
0f2d19dd JB |
941 | SCM |
942 | scm_unread_char (cobj, port) | |
943 | SCM cobj; | |
944 | SCM port; | |
0f2d19dd JB |
945 | { |
946 | int c; | |
947 | ||
948 | SCM_ASSERT (SCM_ICHRP (cobj), cobj, SCM_ARG1, s_unread_char); | |
949 | ||
950 | if (SCM_UNBNDP (port)) | |
951 | port = scm_cur_inp; | |
952 | else | |
953 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG2, s_unread_char); | |
954 | ||
955 | ||
956 | c = SCM_ICHR (cobj); | |
957 | ||
b7f3516f | 958 | scm_ungetc (c, port); |
0f2d19dd JB |
959 | return cobj; |
960 | } | |
961 | ||
ee1e7e13 MD |
962 | SCM_PROC (s_unread_string, "unread-string", 2, 0, 0, scm_unread_string); |
963 | ||
964 | SCM | |
965 | scm_unread_string (str, port) | |
966 | SCM str; | |
967 | SCM port; | |
968 | { | |
d1c90db5 | 969 | SCM_ASSERT (SCM_NIMP (str) && SCM_STRINGP (str), |
ee1e7e13 MD |
970 | str, SCM_ARG1, s_unread_string); |
971 | ||
972 | if (SCM_UNBNDP (port)) | |
973 | port = scm_cur_inp; | |
974 | else | |
975 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), | |
976 | port, SCM_ARG2, s_unread_string); | |
977 | ||
d1c90db5 | 978 | scm_ungets (SCM_ROUCHARS (str), SCM_LENGTH (str), port); |
ee1e7e13 MD |
979 | |
980 | return str; | |
981 | } | |
982 | ||
c94577b4 | 983 | SCM_PROC (s_seek, "seek", 3, 0, 0, scm_seek); |
840ae05d | 984 | SCM |
c94577b4 | 985 | scm_seek (SCM object, SCM offset, SCM whence) |
840ae05d JB |
986 | { |
987 | off_t off; | |
988 | off_t rv; | |
989 | int how; | |
990 | ||
991 | object = SCM_COERCE_OUTPORT (object); | |
992 | ||
c94577b4 GH |
993 | off = scm_num2long (offset, (char *)SCM_ARG2, s_seek); |
994 | SCM_ASSERT (SCM_INUMP (whence), whence, SCM_ARG3, s_seek); | |
840ae05d JB |
995 | how = SCM_INUM (whence); |
996 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) | |
c94577b4 | 997 | scm_out_of_range (s_seek, whence); |
840ae05d JB |
998 | if (SCM_NIMP (object) && SCM_OPPORTP (object)) |
999 | { | |
1000 | scm_port *pt = SCM_PTAB_ENTRY (object); | |
f12733c9 | 1001 | scm_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); |
840ae05d JB |
1002 | |
1003 | if (!ptob->seek) | |
c94577b4 | 1004 | scm_misc_error (s_seek, "port is not seekable", |
840ae05d JB |
1005 | scm_cons (object, SCM_EOL)); |
1006 | else | |
1007 | { | |
1008 | if (pt->rw_active == SCM_PORT_READ) | |
affc96b5 | 1009 | scm_end_input (object); |
840ae05d | 1010 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1011 | ptob->flush (object); |
840ae05d JB |
1012 | |
1013 | rv = ptob->seek (object, off, how); | |
840ae05d JB |
1014 | } |
1015 | } | |
1016 | else /* file descriptor?. */ | |
1017 | { | |
c94577b4 | 1018 | SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_seek); |
840ae05d JB |
1019 | rv = lseek (SCM_INUM (object), off, how); |
1020 | if (rv == -1) | |
c94577b4 | 1021 | scm_syserror (s_seek); |
840ae05d JB |
1022 | } |
1023 | return scm_long2num (rv); | |
1024 | } | |
1025 | ||
69bc9ff3 | 1026 | SCM_PROC (s_truncate_file, "truncate-file", 1, 1, 0, scm_truncate_file); |
840ae05d JB |
1027 | |
1028 | SCM | |
69bc9ff3 | 1029 | scm_truncate_file (SCM object, SCM length) |
840ae05d | 1030 | { |
69bc9ff3 GH |
1031 | int rv; |
1032 | off_t c_length; | |
1033 | ||
1034 | /* object can be a port, fdes or filename. */ | |
840ae05d | 1035 | |
840ae05d JB |
1036 | if (SCM_UNBNDP (length)) |
1037 | { | |
69bc9ff3 GH |
1038 | /* must supply length if object is a filename. */ |
1039 | if (SCM_NIMP (object) && SCM_ROSTRINGP (object)) | |
1040 | scm_wrong_num_args (scm_makfrom0str (s_truncate_file)); | |
1041 | ||
c94577b4 | 1042 | length = scm_seek (object, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); |
840ae05d | 1043 | } |
69bc9ff3 GH |
1044 | c_length = scm_num2long (length, (char *)SCM_ARG2, s_truncate_file); |
1045 | if (c_length < 0) | |
1046 | scm_misc_error (s_truncate_file, "negative offset", SCM_EOL); | |
3fe6190f | 1047 | |
69bc9ff3 GH |
1048 | object = SCM_COERCE_OUTPORT (object); |
1049 | if (SCM_INUMP (object)) | |
1050 | { | |
1051 | SCM_SYSCALL (rv = ftruncate (SCM_INUM (object), c_length)); | |
1052 | } | |
1053 | else if (SCM_NIMP (object) && SCM_OPOUTPORTP (object)) | |
1054 | { | |
1055 | scm_port *pt = SCM_PTAB_ENTRY (object); | |
f12733c9 | 1056 | scm_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); |
69bc9ff3 | 1057 | |
affc96b5 | 1058 | if (!ptob->truncate) |
69bc9ff3 GH |
1059 | scm_misc_error (s_truncate_file, "port is not truncatable", SCM_EOL); |
1060 | if (pt->rw_active == SCM_PORT_READ) | |
affc96b5 | 1061 | scm_end_input (object); |
69bc9ff3 | 1062 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1063 | ptob->flush (object); |
69bc9ff3 | 1064 | |
affc96b5 | 1065 | ptob->truncate (object, c_length); |
69bc9ff3 GH |
1066 | rv = 0; |
1067 | } | |
1068 | else | |
1069 | { | |
1070 | SCM_ASSERT (SCM_NIMP (object) && SCM_ROSTRINGP (object), | |
1071 | object, SCM_ARG1, s_truncate_file); | |
1072 | SCM_COERCE_SUBSTR (object); | |
1073 | SCM_SYSCALL (rv = truncate (SCM_ROCHARS (object), c_length)); | |
1074 | } | |
1075 | if (rv == -1) | |
1076 | scm_syserror (s_truncate_file); | |
840ae05d JB |
1077 | return SCM_UNSPECIFIED; |
1078 | } | |
1079 | ||
360fc44c | 1080 | SCM_PROC (s_port_line, "port-line", 1, 0, 0, scm_port_line); |
1cc91f1b | 1081 | |
0f2d19dd | 1082 | SCM |
d14af9f2 | 1083 | scm_port_line (port) |
0f2d19dd | 1084 | SCM port; |
0f2d19dd | 1085 | { |
78446828 | 1086 | port = SCM_COERCE_OUTPORT (port); |
360fc44c MD |
1087 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), |
1088 | port, | |
1089 | SCM_ARG1, | |
1090 | s_port_line); | |
1091 | return SCM_MAKINUM (SCM_LINUM (port)); | |
0f2d19dd JB |
1092 | } |
1093 | ||
360fc44c | 1094 | SCM_PROC (s_set_port_line_x, "set-port-line!", 2, 0, 0, scm_set_port_line_x); |
d043d8c2 MD |
1095 | |
1096 | SCM | |
1097 | scm_set_port_line_x (port, line) | |
1098 | SCM port; | |
1099 | SCM line; | |
1100 | { | |
360fc44c MD |
1101 | port = SCM_COERCE_OUTPORT (port); |
1102 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), | |
1103 | port, | |
1104 | SCM_ARG1, | |
1105 | s_set_port_line_x); | |
1106 | SCM_ASSERT (SCM_INUMP (line), line, SCM_ARG2, s_set_port_line_x); | |
d043d8c2 MD |
1107 | return SCM_PTAB_ENTRY (port)->line_number = SCM_INUM (line); |
1108 | } | |
1109 | ||
360fc44c | 1110 | SCM_PROC (s_port_column, "port-column", 1, 0, 0, scm_port_column); |
1cc91f1b | 1111 | |
0f2d19dd | 1112 | SCM |
d14af9f2 | 1113 | scm_port_column (port) |
0f2d19dd | 1114 | SCM port; |
0f2d19dd | 1115 | { |
78446828 | 1116 | port = SCM_COERCE_OUTPORT (port); |
360fc44c MD |
1117 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), |
1118 | port, | |
1119 | SCM_ARG1, | |
1120 | s_port_column); | |
1121 | return SCM_MAKINUM (SCM_COL (port)); | |
0f2d19dd JB |
1122 | } |
1123 | ||
360fc44c | 1124 | SCM_PROC (s_set_port_column_x, "set-port-column!", 2, 0, 0, scm_set_port_column_x); |
d043d8c2 MD |
1125 | |
1126 | SCM | |
1127 | scm_set_port_column_x (port, column) | |
1128 | SCM port; | |
1129 | SCM column; | |
1130 | { | |
360fc44c MD |
1131 | port = SCM_COERCE_OUTPORT (port); |
1132 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), | |
1133 | port, | |
1134 | SCM_ARG1, | |
1135 | s_set_port_column_x); | |
1136 | SCM_ASSERT (SCM_INUMP (column), column, SCM_ARG2, s_set_port_column_x); | |
d043d8c2 MD |
1137 | return SCM_PTAB_ENTRY (port)->column_number = SCM_INUM (column); |
1138 | } | |
1139 | ||
360fc44c | 1140 | SCM_PROC (s_port_filename, "port-filename", 1, 0, 0, scm_port_filename); |
1cc91f1b | 1141 | |
0f2d19dd | 1142 | SCM |
d14af9f2 | 1143 | scm_port_filename (port) |
0f2d19dd | 1144 | SCM port; |
0f2d19dd | 1145 | { |
78446828 | 1146 | port = SCM_COERCE_OUTPORT (port); |
360fc44c MD |
1147 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), |
1148 | port, | |
1149 | SCM_ARG1, | |
1150 | s_port_filename); | |
1151 | return SCM_PTAB_ENTRY (port)->file_name; | |
0f2d19dd JB |
1152 | } |
1153 | ||
360fc44c | 1154 | SCM_PROC (s_set_port_filename_x, "set-port-filename!", 2, 0, 0, scm_set_port_filename_x); |
1cc91f1b | 1155 | |
d14af9f2 MD |
1156 | SCM |
1157 | scm_set_port_filename_x (port, filename) | |
1158 | SCM port; | |
1159 | SCM filename; | |
d14af9f2 | 1160 | { |
360fc44c MD |
1161 | port = SCM_COERCE_OUTPORT (port); |
1162 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), | |
1163 | port, | |
1164 | SCM_ARG1, | |
1165 | s_set_port_filename_x); | |
1166 | /* We allow the user to set the filename to whatever he likes. */ | |
d14af9f2 MD |
1167 | return SCM_PTAB_ENTRY (port)->file_name = filename; |
1168 | } | |
1169 | ||
0f2d19dd JB |
1170 | #ifndef ttyname |
1171 | extern char * ttyname(); | |
1172 | #endif | |
1173 | ||
f12733c9 MD |
1174 | void |
1175 | scm_print_port_mode (SCM exp, SCM port) | |
1176 | { | |
1177 | scm_puts (SCM_CLOSEDP (exp) | |
1178 | ? "closed: " | |
1179 | : (SCM_RDNG & SCM_CAR (exp) | |
1180 | ? (SCM_WRTNG & SCM_CAR (exp) | |
1181 | ? "input-output: " | |
1182 | : "input: ") | |
1183 | : (SCM_WRTNG & SCM_CAR (exp) | |
1184 | ? "output: " | |
1185 | : "bogus: ")), | |
1186 | port); | |
1187 | } | |
1cc91f1b | 1188 | |
f12733c9 MD |
1189 | int |
1190 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate) | |
0f2d19dd | 1191 | { |
f12733c9 MD |
1192 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
1193 | if (!type) | |
1194 | type = "port"; | |
b7f3516f | 1195 | scm_puts ("#<", port); |
f12733c9 | 1196 | scm_print_port_mode (exp, port); |
b7f3516f TT |
1197 | scm_puts (type, port); |
1198 | scm_putc (' ', port); | |
f12733c9 | 1199 | scm_intprint (SCM_CDR (exp), 16, port); |
b7f3516f | 1200 | scm_putc ('>', port); |
f12733c9 | 1201 | return 1; |
0f2d19dd JB |
1202 | } |
1203 | ||
f12733c9 MD |
1204 | extern void scm_make_fptob (); |
1205 | extern void scm_make_stptob (); | |
1206 | extern void scm_make_sfptob (); | |
1cc91f1b | 1207 | |
0f2d19dd JB |
1208 | void |
1209 | scm_ports_prehistory () | |
0f2d19dd JB |
1210 | { |
1211 | scm_numptob = 0; | |
f12733c9 | 1212 | scm_ptobs = (scm_ptob_descriptor *) malloc (sizeof (scm_ptob_descriptor)); |
0f2d19dd JB |
1213 | |
1214 | /* WARNING: These scm_newptob calls must be done in this order. | |
1215 | * They must agree with the port declarations in tags.h. | |
1216 | */ | |
f12733c9 MD |
1217 | /* scm_tc16_fport = */ scm_make_fptob (); |
1218 | /* scm_tc16_pipe was here */ scm_make_fptob (); /* dummy. */ | |
1219 | /* scm_tc16_strport = */ scm_make_stptob (); | |
1220 | /* scm_tc16_sfport = */ scm_make_sfptob (); | |
0f2d19dd | 1221 | } |
0f2d19dd JB |
1222 | |
1223 | \f | |
ee149d03 | 1224 | |
d68fee48 | 1225 | /* Void ports. */ |
0f2d19dd | 1226 | |
f12733c9 | 1227 | long scm_tc16_void_port = 0; |
0f2d19dd | 1228 | |
ee149d03 | 1229 | static void |
0f88a8f3 | 1230 | flush_void_port (SCM port) |
0f2d19dd | 1231 | { |
3cb988bd | 1232 | } |
1cc91f1b | 1233 | |
283a1a0e | 1234 | static void |
affc96b5 | 1235 | end_input_void_port (SCM port, int offset) |
283a1a0e GH |
1236 | { |
1237 | } | |
1238 | ||
31703ab8 GH |
1239 | static void |
1240 | write_void_port (SCM port, void *data, size_t size) | |
1241 | { | |
1242 | } | |
1243 | ||
0f2d19dd JB |
1244 | SCM |
1245 | scm_void_port (mode_str) | |
1246 | char * mode_str; | |
0f2d19dd JB |
1247 | { |
1248 | int mode_bits; | |
1249 | SCM answer; | |
840ae05d | 1250 | scm_port * pt; |
0f2d19dd JB |
1251 | |
1252 | SCM_NEWCELL (answer); | |
1253 | SCM_DEFER_INTS; | |
1254 | mode_bits = scm_mode_bits (mode_str); | |
1255 | pt = scm_add_to_port_table (answer); | |
0f2d19dd | 1256 | SCM_SETPTAB_ENTRY (answer, pt); |
ee149d03 JB |
1257 | SCM_SETSTREAM (answer, 0); |
1258 | SCM_SETCAR (answer, scm_tc16_void_port | mode_bits); | |
0f2d19dd JB |
1259 | SCM_ALLOW_INTS; |
1260 | return answer; | |
1261 | } | |
1262 | ||
1263 | ||
1264 | SCM_PROC (s_sys_make_void_port, "%make-void-port", 1, 0, 0, scm_sys_make_void_port); | |
1cc91f1b | 1265 | |
0f2d19dd JB |
1266 | SCM |
1267 | scm_sys_make_void_port (mode) | |
1268 | SCM mode; | |
0f2d19dd | 1269 | { |
89958ad0 | 1270 | SCM_ASSERT (SCM_NIMP (mode) && SCM_ROSTRINGP (mode), mode, |
0f2d19dd JB |
1271 | SCM_ARG1, s_sys_make_void_port); |
1272 | ||
89958ad0 | 1273 | SCM_COERCE_SUBSTR (mode); |
0f2d19dd JB |
1274 | return scm_void_port (SCM_ROCHARS (mode)); |
1275 | } | |
1276 | ||
0f2d19dd | 1277 | \f |
89545eba | 1278 | /* Initialization. */ |
1cc91f1b | 1279 | |
0f2d19dd JB |
1280 | void |
1281 | scm_init_ports () | |
0f2d19dd | 1282 | { |
840ae05d JB |
1283 | /* lseek() symbols. */ |
1284 | scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET)); | |
1285 | scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR)); | |
1286 | scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END)); | |
1287 | ||
affc96b5 | 1288 | scm_tc16_void_port = scm_make_port_type ("void", 0, write_void_port); |
0f2d19dd JB |
1289 | #include "ports.x" |
1290 | } |