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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)) | |
624 | return SCM_BOOL_F; | |
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)) | |
635 | return SCM_BOOL_F; | |
636 | return SCM_OUTPORTP (x) ? SCM_BOOL_T : SCM_BOOL_F; | |
637 | } | |
638 | ||
639 | ||
640 | SCM_PROC(s_eof_object_p, "eof-object?", 1, 0, 0, scm_eof_object_p); | |
1cc91f1b | 641 | |
0f2d19dd JB |
642 | SCM |
643 | scm_eof_object_p (x) | |
644 | SCM x; | |
0f2d19dd | 645 | { |
0c32d76c | 646 | return SCM_EOF_OBJECT_P (x) ? SCM_BOOL_T : SCM_BOOL_F; |
0f2d19dd JB |
647 | } |
648 | ||
649 | SCM_PROC(s_force_output, "force-output", 0, 1, 0, scm_force_output); | |
1cc91f1b | 650 | |
0f2d19dd JB |
651 | SCM |
652 | scm_force_output (port) | |
653 | SCM port; | |
0f2d19dd JB |
654 | { |
655 | if (SCM_UNBNDP (port)) | |
3e877d15 | 656 | port = scm_cur_outp; |
0f2d19dd | 657 | else |
78446828 MV |
658 | { |
659 | port = SCM_COERCE_OUTPORT (port); | |
3e877d15 JB |
660 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG1, |
661 | s_force_output); | |
78446828 | 662 | } |
affc96b5 | 663 | scm_flush (port); |
ee149d03 | 664 | return SCM_UNSPECIFIED; |
0f2d19dd JB |
665 | } |
666 | ||
9c29ac66 | 667 | SCM_PROC (s_flush_all_ports, "flush-all-ports", 0, 0, 0, scm_flush_all_ports); |
89ea5b7c GH |
668 | SCM |
669 | scm_flush_all_ports (void) | |
670 | { | |
671 | int i; | |
672 | ||
673 | for (i = 0; i < scm_port_table_size; i++) | |
674 | { | |
ee149d03 | 675 | if (SCM_OPOUTPORTP (scm_port_table[i]->port)) |
affc96b5 | 676 | scm_flush (scm_port_table[i]->port); |
89ea5b7c GH |
677 | } |
678 | return SCM_UNSPECIFIED; | |
679 | } | |
0f2d19dd JB |
680 | |
681 | SCM_PROC(s_read_char, "read-char", 0, 1, 0, scm_read_char); | |
1cc91f1b | 682 | |
0f2d19dd JB |
683 | SCM |
684 | scm_read_char (port) | |
685 | SCM port; | |
0f2d19dd JB |
686 | { |
687 | int c; | |
688 | if (SCM_UNBNDP (port)) | |
334341aa | 689 | port = scm_cur_inp; |
0f2d19dd JB |
690 | else |
691 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG1, s_read_char); | |
b7f3516f | 692 | c = scm_getc (port); |
0f2d19dd JB |
693 | if (EOF == c) |
694 | return SCM_EOF_VAL; | |
695 | return SCM_MAKICHR (c); | |
696 | } | |
697 | ||
5c070ca7 | 698 | /* this should only be called when the read buffer is empty. it |
affc96b5 | 699 | tries to refill the read buffer. it returns the first char from |
5c070ca7 | 700 | the port, which is either EOF or *(pt->read_pos). */ |
6c951427 | 701 | int |
affc96b5 | 702 | scm_fill_input (SCM port) |
6c951427 | 703 | { |
283a1a0e GH |
704 | scm_port *pt = SCM_PTAB_ENTRY (port); |
705 | ||
6c951427 GH |
706 | if (pt->read_buf == pt->putback_buf) |
707 | { | |
708 | /* finished reading put-back chars. */ | |
709 | pt->read_buf = pt->saved_read_buf; | |
710 | pt->read_pos = pt->saved_read_pos; | |
711 | pt->read_end = pt->saved_read_end; | |
712 | pt->read_buf_size = pt->saved_read_buf_size; | |
713 | if (pt->read_pos < pt->read_end) | |
5c070ca7 | 714 | return *(pt->read_pos); |
6c951427 | 715 | } |
affc96b5 | 716 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
6c951427 GH |
717 | } |
718 | ||
ee149d03 JB |
719 | int |
720 | scm_getc (port) | |
0f2d19dd | 721 | SCM port; |
0f2d19dd JB |
722 | { |
723 | int c; | |
840ae05d | 724 | scm_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 | 725 | |
840ae05d JB |
726 | if (pt->rw_active == SCM_PORT_WRITE) |
727 | { | |
affc96b5 GH |
728 | /* may be marginally faster than calling scm_flush. */ |
729 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
840ae05d | 730 | } |
6c951427 | 731 | |
5c070ca7 GH |
732 | if (pt->rw_random) |
733 | pt->rw_active = SCM_PORT_READ; | |
734 | ||
735 | if (pt->read_pos >= pt->read_end) | |
ee149d03 | 736 | { |
affc96b5 | 737 | if (scm_fill_input (port) == EOF) |
5c070ca7 | 738 | return EOF; |
ee149d03 JB |
739 | } |
740 | ||
5c070ca7 | 741 | c = *(pt->read_pos++); |
840ae05d | 742 | |
ee149d03 JB |
743 | if (c == '\n') |
744 | { | |
745 | SCM_INCLINE (port); | |
746 | } | |
747 | else if (c == '\t') | |
748 | { | |
749 | SCM_TABCOL (port); | |
750 | } | |
751 | else | |
752 | { | |
753 | SCM_INCCOL (port); | |
754 | } | |
755 | ||
756 | return c; | |
0f2d19dd JB |
757 | } |
758 | ||
ee149d03 JB |
759 | void |
760 | scm_putc (c, port) | |
265e6a4d | 761 | char c; |
ee149d03 JB |
762 | SCM port; |
763 | { | |
265e6a4d | 764 | scm_lfwrite (&c, 1, port); |
ee149d03 | 765 | } |
3cb988bd | 766 | |
ee149d03 JB |
767 | void |
768 | scm_puts (s, port) | |
769 | char *s; | |
3cb988bd TP |
770 | SCM port; |
771 | { | |
265e6a4d | 772 | scm_lfwrite (s, strlen (s), port); |
ee149d03 | 773 | } |
3cb988bd | 774 | |
ee149d03 JB |
775 | void |
776 | scm_lfwrite (ptr, size, port) | |
777 | char *ptr; | |
778 | scm_sizet size; | |
779 | SCM port; | |
780 | { | |
840ae05d | 781 | scm_port *pt = SCM_PTAB_ENTRY (port); |
f12733c9 | 782 | scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
3e2043c4 | 783 | |
840ae05d | 784 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 785 | scm_end_input (port); |
283a1a0e | 786 | |
31703ab8 | 787 | ptob->write (port, ptr, size); |
840ae05d JB |
788 | |
789 | if (pt->rw_random) | |
790 | pt->rw_active = SCM_PORT_WRITE; | |
ee149d03 | 791 | } |
3cb988bd | 792 | |
3cb988bd | 793 | |
ee149d03 | 794 | void |
affc96b5 | 795 | scm_flush (port) |
ee149d03 JB |
796 | SCM port; |
797 | { | |
798 | scm_sizet i = SCM_PTOBNUM (port); | |
affc96b5 | 799 | (scm_ptobs[i].flush) (port); |
ee149d03 JB |
800 | } |
801 | ||
283a1a0e | 802 | void |
affc96b5 | 803 | scm_end_input (port) |
283a1a0e GH |
804 | SCM port; |
805 | { | |
806 | int offset; | |
807 | scm_port *pt = SCM_PTAB_ENTRY (port); | |
808 | ||
809 | if (pt->read_buf == pt->putback_buf) | |
810 | { | |
811 | offset = pt->read_end - pt->read_pos; | |
812 | pt->read_buf = pt->saved_read_buf; | |
813 | pt->read_pos = pt->saved_read_pos; | |
814 | pt->read_end = pt->saved_read_end; | |
815 | pt->read_buf_size = pt->saved_read_buf_size; | |
816 | } | |
817 | else | |
818 | offset = 0; | |
819 | ||
affc96b5 | 820 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
283a1a0e GH |
821 | } |
822 | ||
ee149d03 JB |
823 | \f |
824 | ||
825 | ||
826 | void | |
827 | scm_ungetc (c, port) | |
828 | int c; | |
829 | SCM port; | |
830 | { | |
840ae05d JB |
831 | scm_port *pt = SCM_PTAB_ENTRY (port); |
832 | ||
6c951427 GH |
833 | if (pt->read_buf == pt->putback_buf) |
834 | /* already using the put-back buffer. */ | |
835 | { | |
836 | /* enlarge putback_buf if necessary. */ | |
837 | if (pt->read_end == pt->read_buf + pt->read_buf_size | |
838 | && pt->read_buf == pt->read_pos) | |
839 | { | |
840 | int new_size = pt->read_buf_size * 2; | |
841 | unsigned char *tmp = | |
842 | (unsigned char *) realloc (pt->putback_buf, new_size); | |
843 | ||
844 | if (tmp == NULL) | |
845 | scm_memory_error ("scm_ungetc"); | |
846 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; | |
847 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
848 | pt->read_buf_size = pt->putback_buf_size = new_size; | |
849 | } | |
850 | ||
851 | /* shift any existing bytes to buffer + 1. */ | |
852 | if (pt->read_pos == pt->read_end) | |
853 | pt->read_end = pt->read_buf + 1; | |
854 | else if (pt->read_pos != pt->read_buf + 1) | |
855 | { | |
856 | int count = pt->read_end - pt->read_pos; | |
857 | ||
858 | memmove (pt->read_buf + 1, pt->read_pos, count); | |
859 | pt->read_end = pt->read_buf + 1 + count; | |
860 | } | |
861 | ||
862 | pt->read_pos = pt->read_buf; | |
863 | } | |
864 | else | |
865 | /* switch to the put-back buffer. */ | |
866 | { | |
867 | if (pt->putback_buf == NULL) | |
868 | { | |
869 | pt->putback_buf = (char *) malloc (pt->putback_buf_size); | |
870 | if (pt->putback_buf == NULL) | |
871 | scm_memory_error ("scm_ungetc"); | |
872 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; | |
873 | } | |
874 | ||
875 | pt->saved_read_buf = pt->read_buf; | |
876 | pt->saved_read_pos = pt->read_pos; | |
877 | pt->saved_read_end = pt->read_end; | |
878 | pt->saved_read_buf_size = pt->read_buf_size; | |
879 | ||
880 | pt->read_pos = pt->read_buf = pt->putback_buf; | |
881 | pt->read_end = pt->read_buf + 1; | |
882 | pt->read_buf_size = pt->putback_buf_size; | |
883 | } | |
884 | ||
885 | *pt->read_buf = c; | |
ee149d03 | 886 | |
840ae05d JB |
887 | if (pt->rw_random) |
888 | pt->rw_active = SCM_PORT_READ; | |
889 | ||
ee149d03 JB |
890 | if (c == '\n') |
891 | { | |
892 | /* What should col be in this case? | |
893 | * We'll leave it at -1. | |
894 | */ | |
895 | SCM_LINUM (port) -= 1; | |
896 | } | |
897 | else | |
898 | SCM_COL(port) -= 1; | |
899 | } | |
900 | ||
901 | ||
902 | void | |
903 | scm_ungets (s, n, port) | |
904 | char *s; | |
905 | int n; | |
906 | SCM port; | |
907 | { | |
908 | /* This is simple minded and inefficient, but unreading strings is | |
909 | * probably not a common operation, and remember that line and | |
910 | * column numbers have to be handled... | |
911 | * | |
912 | * Please feel free to write an optimized version! | |
913 | */ | |
914 | while (n--) | |
915 | scm_ungetc (s[n], port); | |
916 | } | |
917 | ||
918 | ||
919 | SCM_PROC(s_peek_char, "peek-char", 0, 1, 0, scm_peek_char); | |
920 | ||
921 | SCM | |
922 | scm_peek_char (port) | |
923 | SCM port; | |
924 | { | |
925 | int c; | |
926 | if (SCM_UNBNDP (port)) | |
927 | port = scm_cur_inp; | |
928 | else | |
929 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG1, s_peek_char); | |
930 | c = scm_getc (port); | |
931 | if (EOF == c) | |
932 | return SCM_EOF_VAL; | |
933 | scm_ungetc (c, port); | |
934 | return SCM_MAKICHR (c); | |
3cb988bd TP |
935 | } |
936 | ||
0f2d19dd | 937 | SCM_PROC (s_unread_char, "unread-char", 2, 0, 0, scm_unread_char); |
1cc91f1b | 938 | |
0f2d19dd JB |
939 | SCM |
940 | scm_unread_char (cobj, port) | |
941 | SCM cobj; | |
942 | SCM port; | |
0f2d19dd JB |
943 | { |
944 | int c; | |
945 | ||
946 | SCM_ASSERT (SCM_ICHRP (cobj), cobj, SCM_ARG1, s_unread_char); | |
947 | ||
948 | if (SCM_UNBNDP (port)) | |
949 | port = scm_cur_inp; | |
950 | else | |
951 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), port, SCM_ARG2, s_unread_char); | |
952 | ||
953 | ||
954 | c = SCM_ICHR (cobj); | |
955 | ||
b7f3516f | 956 | scm_ungetc (c, port); |
0f2d19dd JB |
957 | return cobj; |
958 | } | |
959 | ||
ee1e7e13 MD |
960 | SCM_PROC (s_unread_string, "unread-string", 2, 0, 0, scm_unread_string); |
961 | ||
962 | SCM | |
963 | scm_unread_string (str, port) | |
964 | SCM str; | |
965 | SCM port; | |
966 | { | |
d1c90db5 | 967 | SCM_ASSERT (SCM_NIMP (str) && SCM_STRINGP (str), |
ee1e7e13 MD |
968 | str, SCM_ARG1, s_unread_string); |
969 | ||
970 | if (SCM_UNBNDP (port)) | |
971 | port = scm_cur_inp; | |
972 | else | |
973 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port), | |
974 | port, SCM_ARG2, s_unread_string); | |
975 | ||
d1c90db5 | 976 | scm_ungets (SCM_ROUCHARS (str), SCM_LENGTH (str), port); |
ee1e7e13 MD |
977 | |
978 | return str; | |
979 | } | |
980 | ||
c94577b4 | 981 | SCM_PROC (s_seek, "seek", 3, 0, 0, scm_seek); |
840ae05d | 982 | SCM |
c94577b4 | 983 | scm_seek (SCM object, SCM offset, SCM whence) |
840ae05d JB |
984 | { |
985 | off_t off; | |
986 | off_t rv; | |
987 | int how; | |
988 | ||
989 | object = SCM_COERCE_OUTPORT (object); | |
990 | ||
c94577b4 GH |
991 | off = scm_num2long (offset, (char *)SCM_ARG2, s_seek); |
992 | SCM_ASSERT (SCM_INUMP (whence), whence, SCM_ARG3, s_seek); | |
840ae05d JB |
993 | how = SCM_INUM (whence); |
994 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) | |
c94577b4 | 995 | scm_out_of_range (s_seek, whence); |
840ae05d JB |
996 | if (SCM_NIMP (object) && SCM_OPPORTP (object)) |
997 | { | |
998 | scm_port *pt = SCM_PTAB_ENTRY (object); | |
f12733c9 | 999 | scm_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); |
840ae05d JB |
1000 | |
1001 | if (!ptob->seek) | |
c94577b4 | 1002 | scm_misc_error (s_seek, "port is not seekable", |
840ae05d JB |
1003 | scm_cons (object, SCM_EOL)); |
1004 | else | |
1005 | { | |
1006 | if (pt->rw_active == SCM_PORT_READ) | |
affc96b5 | 1007 | scm_end_input (object); |
840ae05d | 1008 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1009 | ptob->flush (object); |
840ae05d JB |
1010 | |
1011 | rv = ptob->seek (object, off, how); | |
840ae05d JB |
1012 | } |
1013 | } | |
1014 | else /* file descriptor?. */ | |
1015 | { | |
c94577b4 | 1016 | SCM_ASSERT (SCM_INUMP (object), object, SCM_ARG1, s_seek); |
840ae05d JB |
1017 | rv = lseek (SCM_INUM (object), off, how); |
1018 | if (rv == -1) | |
c94577b4 | 1019 | scm_syserror (s_seek); |
840ae05d JB |
1020 | } |
1021 | return scm_long2num (rv); | |
1022 | } | |
1023 | ||
69bc9ff3 | 1024 | SCM_PROC (s_truncate_file, "truncate-file", 1, 1, 0, scm_truncate_file); |
840ae05d JB |
1025 | |
1026 | SCM | |
69bc9ff3 | 1027 | scm_truncate_file (SCM object, SCM length) |
840ae05d | 1028 | { |
69bc9ff3 GH |
1029 | int rv; |
1030 | off_t c_length; | |
1031 | ||
1032 | /* object can be a port, fdes or filename. */ | |
840ae05d | 1033 | |
840ae05d JB |
1034 | if (SCM_UNBNDP (length)) |
1035 | { | |
69bc9ff3 GH |
1036 | /* must supply length if object is a filename. */ |
1037 | if (SCM_NIMP (object) && SCM_ROSTRINGP (object)) | |
1038 | scm_wrong_num_args (scm_makfrom0str (s_truncate_file)); | |
1039 | ||
c94577b4 | 1040 | length = scm_seek (object, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); |
840ae05d | 1041 | } |
69bc9ff3 GH |
1042 | c_length = scm_num2long (length, (char *)SCM_ARG2, s_truncate_file); |
1043 | if (c_length < 0) | |
1044 | scm_misc_error (s_truncate_file, "negative offset", SCM_EOL); | |
3fe6190f | 1045 | |
69bc9ff3 GH |
1046 | object = SCM_COERCE_OUTPORT (object); |
1047 | if (SCM_INUMP (object)) | |
1048 | { | |
1049 | SCM_SYSCALL (rv = ftruncate (SCM_INUM (object), c_length)); | |
1050 | } | |
1051 | else if (SCM_NIMP (object) && SCM_OPOUTPORTP (object)) | |
1052 | { | |
1053 | scm_port *pt = SCM_PTAB_ENTRY (object); | |
f12733c9 | 1054 | scm_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); |
69bc9ff3 | 1055 | |
affc96b5 | 1056 | if (!ptob->truncate) |
69bc9ff3 GH |
1057 | scm_misc_error (s_truncate_file, "port is not truncatable", SCM_EOL); |
1058 | if (pt->rw_active == SCM_PORT_READ) | |
affc96b5 | 1059 | scm_end_input (object); |
69bc9ff3 | 1060 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1061 | ptob->flush (object); |
69bc9ff3 | 1062 | |
affc96b5 | 1063 | ptob->truncate (object, c_length); |
69bc9ff3 GH |
1064 | rv = 0; |
1065 | } | |
1066 | else | |
1067 | { | |
1068 | SCM_ASSERT (SCM_NIMP (object) && SCM_ROSTRINGP (object), | |
1069 | object, SCM_ARG1, s_truncate_file); | |
1070 | SCM_COERCE_SUBSTR (object); | |
1071 | SCM_SYSCALL (rv = truncate (SCM_ROCHARS (object), c_length)); | |
1072 | } | |
1073 | if (rv == -1) | |
1074 | scm_syserror (s_truncate_file); | |
840ae05d JB |
1075 | return SCM_UNSPECIFIED; |
1076 | } | |
1077 | ||
360fc44c | 1078 | SCM_PROC (s_port_line, "port-line", 1, 0, 0, scm_port_line); |
1cc91f1b | 1079 | |
0f2d19dd | 1080 | SCM |
d14af9f2 | 1081 | scm_port_line (port) |
0f2d19dd | 1082 | SCM port; |
0f2d19dd | 1083 | { |
78446828 | 1084 | port = SCM_COERCE_OUTPORT (port); |
360fc44c MD |
1085 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), |
1086 | port, | |
1087 | SCM_ARG1, | |
1088 | s_port_line); | |
1089 | return SCM_MAKINUM (SCM_LINUM (port)); | |
0f2d19dd JB |
1090 | } |
1091 | ||
360fc44c | 1092 | SCM_PROC (s_set_port_line_x, "set-port-line!", 2, 0, 0, scm_set_port_line_x); |
d043d8c2 MD |
1093 | |
1094 | SCM | |
1095 | scm_set_port_line_x (port, line) | |
1096 | SCM port; | |
1097 | SCM line; | |
1098 | { | |
360fc44c MD |
1099 | port = SCM_COERCE_OUTPORT (port); |
1100 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), | |
1101 | port, | |
1102 | SCM_ARG1, | |
1103 | s_set_port_line_x); | |
1104 | SCM_ASSERT (SCM_INUMP (line), line, SCM_ARG2, s_set_port_line_x); | |
d043d8c2 MD |
1105 | return SCM_PTAB_ENTRY (port)->line_number = SCM_INUM (line); |
1106 | } | |
1107 | ||
360fc44c | 1108 | SCM_PROC (s_port_column, "port-column", 1, 0, 0, scm_port_column); |
1cc91f1b | 1109 | |
0f2d19dd | 1110 | SCM |
d14af9f2 | 1111 | scm_port_column (port) |
0f2d19dd | 1112 | SCM port; |
0f2d19dd | 1113 | { |
78446828 | 1114 | port = SCM_COERCE_OUTPORT (port); |
360fc44c MD |
1115 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), |
1116 | port, | |
1117 | SCM_ARG1, | |
1118 | s_port_column); | |
1119 | return SCM_MAKINUM (SCM_COL (port)); | |
0f2d19dd JB |
1120 | } |
1121 | ||
360fc44c | 1122 | SCM_PROC (s_set_port_column_x, "set-port-column!", 2, 0, 0, scm_set_port_column_x); |
d043d8c2 MD |
1123 | |
1124 | SCM | |
1125 | scm_set_port_column_x (port, column) | |
1126 | SCM port; | |
1127 | SCM column; | |
1128 | { | |
360fc44c MD |
1129 | port = SCM_COERCE_OUTPORT (port); |
1130 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), | |
1131 | port, | |
1132 | SCM_ARG1, | |
1133 | s_set_port_column_x); | |
1134 | SCM_ASSERT (SCM_INUMP (column), column, SCM_ARG2, s_set_port_column_x); | |
d043d8c2 MD |
1135 | return SCM_PTAB_ENTRY (port)->column_number = SCM_INUM (column); |
1136 | } | |
1137 | ||
360fc44c | 1138 | SCM_PROC (s_port_filename, "port-filename", 1, 0, 0, scm_port_filename); |
1cc91f1b | 1139 | |
0f2d19dd | 1140 | SCM |
d14af9f2 | 1141 | scm_port_filename (port) |
0f2d19dd | 1142 | SCM port; |
0f2d19dd | 1143 | { |
78446828 | 1144 | port = SCM_COERCE_OUTPORT (port); |
360fc44c MD |
1145 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), |
1146 | port, | |
1147 | SCM_ARG1, | |
1148 | s_port_filename); | |
1149 | return SCM_PTAB_ENTRY (port)->file_name; | |
0f2d19dd JB |
1150 | } |
1151 | ||
360fc44c | 1152 | SCM_PROC (s_set_port_filename_x, "set-port-filename!", 2, 0, 0, scm_set_port_filename_x); |
1cc91f1b | 1153 | |
d14af9f2 MD |
1154 | SCM |
1155 | scm_set_port_filename_x (port, filename) | |
1156 | SCM port; | |
1157 | SCM filename; | |
d14af9f2 | 1158 | { |
360fc44c MD |
1159 | port = SCM_COERCE_OUTPORT (port); |
1160 | SCM_ASSERT (SCM_NIMP (port) && SCM_PORTP (port) && SCM_OPENP (port), | |
1161 | port, | |
1162 | SCM_ARG1, | |
1163 | s_set_port_filename_x); | |
1164 | /* We allow the user to set the filename to whatever he likes. */ | |
d14af9f2 MD |
1165 | return SCM_PTAB_ENTRY (port)->file_name = filename; |
1166 | } | |
1167 | ||
0f2d19dd JB |
1168 | #ifndef ttyname |
1169 | extern char * ttyname(); | |
1170 | #endif | |
1171 | ||
f12733c9 MD |
1172 | void |
1173 | scm_print_port_mode (SCM exp, SCM port) | |
1174 | { | |
1175 | scm_puts (SCM_CLOSEDP (exp) | |
1176 | ? "closed: " | |
1177 | : (SCM_RDNG & SCM_CAR (exp) | |
1178 | ? (SCM_WRTNG & SCM_CAR (exp) | |
1179 | ? "input-output: " | |
1180 | : "input: ") | |
1181 | : (SCM_WRTNG & SCM_CAR (exp) | |
1182 | ? "output: " | |
1183 | : "bogus: ")), | |
1184 | port); | |
1185 | } | |
1cc91f1b | 1186 | |
f12733c9 MD |
1187 | int |
1188 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate) | |
0f2d19dd | 1189 | { |
f12733c9 MD |
1190 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
1191 | if (!type) | |
1192 | type = "port"; | |
b7f3516f | 1193 | scm_puts ("#<", port); |
f12733c9 | 1194 | scm_print_port_mode (exp, port); |
b7f3516f TT |
1195 | scm_puts (type, port); |
1196 | scm_putc (' ', port); | |
f12733c9 | 1197 | scm_intprint (SCM_CDR (exp), 16, port); |
b7f3516f | 1198 | scm_putc ('>', port); |
f12733c9 | 1199 | return 1; |
0f2d19dd JB |
1200 | } |
1201 | ||
f12733c9 MD |
1202 | extern void scm_make_fptob (); |
1203 | extern void scm_make_stptob (); | |
1204 | extern void scm_make_sfptob (); | |
1cc91f1b | 1205 | |
0f2d19dd JB |
1206 | void |
1207 | scm_ports_prehistory () | |
0f2d19dd JB |
1208 | { |
1209 | scm_numptob = 0; | |
f12733c9 | 1210 | scm_ptobs = (scm_ptob_descriptor *) malloc (sizeof (scm_ptob_descriptor)); |
0f2d19dd JB |
1211 | |
1212 | /* WARNING: These scm_newptob calls must be done in this order. | |
1213 | * They must agree with the port declarations in tags.h. | |
1214 | */ | |
f12733c9 MD |
1215 | /* scm_tc16_fport = */ scm_make_fptob (); |
1216 | /* scm_tc16_pipe was here */ scm_make_fptob (); /* dummy. */ | |
1217 | /* scm_tc16_strport = */ scm_make_stptob (); | |
1218 | /* scm_tc16_sfport = */ scm_make_sfptob (); | |
0f2d19dd | 1219 | } |
0f2d19dd JB |
1220 | |
1221 | \f | |
ee149d03 | 1222 | |
d68fee48 | 1223 | /* Void ports. */ |
0f2d19dd | 1224 | |
f12733c9 | 1225 | long scm_tc16_void_port = 0; |
0f2d19dd | 1226 | |
ee149d03 | 1227 | static void |
0f88a8f3 | 1228 | flush_void_port (SCM port) |
0f2d19dd | 1229 | { |
3cb988bd | 1230 | } |
1cc91f1b | 1231 | |
283a1a0e | 1232 | static void |
affc96b5 | 1233 | end_input_void_port (SCM port, int offset) |
283a1a0e GH |
1234 | { |
1235 | } | |
1236 | ||
31703ab8 GH |
1237 | static void |
1238 | write_void_port (SCM port, void *data, size_t size) | |
1239 | { | |
1240 | } | |
1241 | ||
0f2d19dd JB |
1242 | SCM |
1243 | scm_void_port (mode_str) | |
1244 | char * mode_str; | |
0f2d19dd JB |
1245 | { |
1246 | int mode_bits; | |
1247 | SCM answer; | |
840ae05d | 1248 | scm_port * pt; |
0f2d19dd JB |
1249 | |
1250 | SCM_NEWCELL (answer); | |
1251 | SCM_DEFER_INTS; | |
1252 | mode_bits = scm_mode_bits (mode_str); | |
1253 | pt = scm_add_to_port_table (answer); | |
0f2d19dd | 1254 | SCM_SETPTAB_ENTRY (answer, pt); |
ee149d03 JB |
1255 | SCM_SETSTREAM (answer, 0); |
1256 | SCM_SETCAR (answer, scm_tc16_void_port | mode_bits); | |
0f2d19dd JB |
1257 | SCM_ALLOW_INTS; |
1258 | return answer; | |
1259 | } | |
1260 | ||
1261 | ||
1262 | SCM_PROC (s_sys_make_void_port, "%make-void-port", 1, 0, 0, scm_sys_make_void_port); | |
1cc91f1b | 1263 | |
0f2d19dd JB |
1264 | SCM |
1265 | scm_sys_make_void_port (mode) | |
1266 | SCM mode; | |
0f2d19dd | 1267 | { |
89958ad0 | 1268 | SCM_ASSERT (SCM_NIMP (mode) && SCM_ROSTRINGP (mode), mode, |
0f2d19dd JB |
1269 | SCM_ARG1, s_sys_make_void_port); |
1270 | ||
89958ad0 | 1271 | SCM_COERCE_SUBSTR (mode); |
0f2d19dd JB |
1272 | return scm_void_port (SCM_ROCHARS (mode)); |
1273 | } | |
1274 | ||
0f2d19dd | 1275 | \f |
89545eba | 1276 | /* Initialization. */ |
1cc91f1b | 1277 | |
0f2d19dd JB |
1278 | void |
1279 | scm_init_ports () | |
0f2d19dd | 1280 | { |
840ae05d JB |
1281 | /* lseek() symbols. */ |
1282 | scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET)); | |
1283 | scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR)); | |
1284 | scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END)); | |
1285 | ||
affc96b5 | 1286 | scm_tc16_void_port = scm_make_port_type ("void", 0, write_void_port); |
0f2d19dd JB |
1287 | #include "ports.x" |
1288 | } |