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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. */ |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
0f2d19dd | 45 | \f |
d68fee48 JB |
46 | /* Headers. */ |
47 | ||
0f2d19dd JB |
48 | #include <stdio.h> |
49 | #include "_scm.h" | |
f12733c9 MD |
50 | #include "objects.h" |
51 | #include "smob.h" | |
20e6290e | 52 | #include "chars.h" |
0f2d19dd | 53 | |
547e65b5 | 54 | #include "keywords.h" |
20e6290e | 55 | |
1bbd0b84 | 56 | #include "scm_validate.h" |
20e6290e | 57 | #include "ports.h" |
0f2d19dd JB |
58 | |
59 | #ifdef HAVE_MALLOC_H | |
95b88819 | 60 | #include <malloc.h> |
0f2d19dd JB |
61 | #endif |
62 | ||
63 | #ifdef HAVE_UNISTD_H | |
64 | #include <unistd.h> | |
65 | #endif | |
66 | ||
95b88819 GH |
67 | #ifdef HAVE_SYS_IOCTL_H |
68 | #include <sys/ioctl.h> | |
69 | #endif | |
d68fee48 | 70 | |
0f2d19dd | 71 | \f |
d68fee48 | 72 | /* The port kind table --- a dynamically resized array of port types. */ |
0f2d19dd JB |
73 | |
74 | ||
75 | /* scm_ptobs scm_numptob | |
76 | * implement a dynamicly resized array of ptob records. | |
77 | * Indexes into this table are used when generating type | |
78 | * tags for smobjects (if you know a tag you can get an index and conversely). | |
79 | */ | |
f12733c9 | 80 | scm_ptob_descriptor *scm_ptobs; |
a1c95c45 | 81 | int scm_numptob; |
0f2d19dd | 82 | |
ee149d03 | 83 | /* GC marker for a port with stream of SCM type. */ |
0f2d19dd | 84 | SCM |
a284e297 | 85 | scm_markstream (SCM ptr) |
0f2d19dd JB |
86 | { |
87 | int openp; | |
0f2d19dd | 88 | openp = SCM_CAR (ptr) & SCM_OPN; |
0f2d19dd JB |
89 | if (openp) |
90 | return SCM_STREAM (ptr); | |
91 | else | |
92 | return SCM_BOOL_F; | |
93 | } | |
94 | ||
f12733c9 | 95 | /* |
f12733c9 | 96 | * We choose to use an interface similar to the smob interface with |
affc96b5 | 97 | * fill_input and write as standard fields, passed to the port |
f12733c9 MD |
98 | * type constructor, and optional fields set by setters. |
99 | */ | |
100 | ||
101 | static void flush_void_port (SCM port); | |
affc96b5 | 102 | static void end_input_void_port (SCM port, int offset); |
31703ab8 | 103 | static void write_void_port (SCM port, void *data, size_t size); |
0f2d19dd | 104 | |
0f2d19dd | 105 | long |
f12733c9 | 106 | scm_make_port_type (char *name, |
affc96b5 GH |
107 | int (*fill_input) (SCM port), |
108 | void (*write) (SCM port, void *data, size_t size)) | |
0f2d19dd JB |
109 | { |
110 | char *tmp; | |
111 | if (255 <= scm_numptob) | |
112 | goto ptoberr; | |
f12733c9 MD |
113 | SCM_DEFER_INTS; |
114 | SCM_SYSCALL (tmp = (char *) realloc ((char *) scm_ptobs, | |
115 | (1 + scm_numptob) | |
116 | * sizeof (scm_ptob_descriptor))); | |
0f2d19dd JB |
117 | if (tmp) |
118 | { | |
f12733c9 | 119 | scm_ptobs = (scm_ptob_descriptor *) tmp; |
affc96b5 | 120 | |
f12733c9 MD |
121 | scm_ptobs[scm_numptob].name = name; |
122 | scm_ptobs[scm_numptob].mark = 0; | |
123 | scm_ptobs[scm_numptob].free = scm_free0; | |
124 | scm_ptobs[scm_numptob].print = scm_port_print; | |
125 | scm_ptobs[scm_numptob].equalp = 0; | |
affc96b5 GH |
126 | scm_ptobs[scm_numptob].close = 0; |
127 | ||
128 | scm_ptobs[scm_numptob].write = write; | |
129 | scm_ptobs[scm_numptob].flush = flush_void_port; | |
130 | ||
131 | scm_ptobs[scm_numptob].end_input = end_input_void_port; | |
132 | scm_ptobs[scm_numptob].fill_input = fill_input; | |
133 | scm_ptobs[scm_numptob].input_waiting = 0; | |
134 | ||
f12733c9 | 135 | scm_ptobs[scm_numptob].seek = 0; |
affc96b5 GH |
136 | scm_ptobs[scm_numptob].truncate = 0; |
137 | ||
0f2d19dd JB |
138 | scm_numptob++; |
139 | } | |
f12733c9 | 140 | SCM_ALLOW_INTS; |
0f2d19dd | 141 | if (!tmp) |
f12733c9 MD |
142 | ptoberr:scm_wta (SCM_MAKINUM ((long) scm_numptob), |
143 | (char *) SCM_NALLOC, "scm_make_port_type"); | |
144 | /* Make a class object if Goops is present */ | |
145 | if (scm_port_class) | |
146 | scm_make_port_classes (scm_numptob - 1, SCM_PTOBNAME (scm_numptob - 1)); | |
0f2d19dd JB |
147 | return scm_tc7_port + (scm_numptob - 1) * 256; |
148 | } | |
149 | ||
f12733c9 | 150 | void |
6c747373 | 151 | scm_set_port_mark (long tc, SCM (*mark) (SCM)) |
f12733c9 MD |
152 | { |
153 | scm_ptobs[SCM_TC2PTOBNUM (tc)].mark = mark; | |
154 | } | |
155 | ||
156 | void | |
6c747373 | 157 | scm_set_port_free (long tc, scm_sizet (*free) (SCM)) |
f12733c9 MD |
158 | { |
159 | scm_ptobs[SCM_TC2PTOBNUM (tc)].free = free; | |
160 | } | |
161 | ||
162 | void | |
6c747373 | 163 | scm_set_port_print (long tc, int (*print) (SCM exp, SCM port, |
f12733c9 MD |
164 | scm_print_state *pstate)) |
165 | { | |
166 | scm_ptobs[SCM_TC2PTOBNUM (tc)].print = print; | |
167 | } | |
168 | ||
169 | void | |
6c747373 | 170 | scm_set_port_equalp (long tc, SCM (*equalp) (SCM, SCM)) |
f12733c9 MD |
171 | { |
172 | scm_ptobs[SCM_TC2PTOBNUM (tc)].equalp = equalp; | |
173 | } | |
174 | ||
31703ab8 | 175 | void |
affc96b5 | 176 | scm_set_port_flush (long tc, void (*flush) (SCM port)) |
31703ab8 | 177 | { |
affc96b5 | 178 | scm_ptobs[SCM_TC2PTOBNUM (tc)].flush = flush; |
31703ab8 GH |
179 | } |
180 | ||
f12733c9 | 181 | void |
affc96b5 | 182 | scm_set_port_end_input (long tc, void (*end_input) (SCM port, int offset)) |
f12733c9 | 183 | { |
affc96b5 | 184 | scm_ptobs[SCM_TC2PTOBNUM (tc)].end_input = end_input; |
f12733c9 MD |
185 | } |
186 | ||
187 | void | |
6c747373 | 188 | scm_set_port_close (long tc, int (*close) (SCM)) |
f12733c9 | 189 | { |
affc96b5 | 190 | scm_ptobs[SCM_TC2PTOBNUM (tc)].close = close; |
f12733c9 MD |
191 | } |
192 | ||
193 | void | |
6c747373 | 194 | scm_set_port_seek (long tc, off_t (*seek) (SCM port, |
f12733c9 MD |
195 | off_t OFFSET, |
196 | int WHENCE)) | |
197 | { | |
198 | scm_ptobs[SCM_TC2PTOBNUM (tc)].seek = seek; | |
199 | } | |
200 | ||
201 | void | |
6c747373 | 202 | scm_set_port_truncate (long tc, void (*truncate) (SCM port, off_t length)) |
f12733c9 | 203 | { |
affc96b5 | 204 | scm_ptobs[SCM_TC2PTOBNUM (tc)].truncate = truncate; |
f12733c9 MD |
205 | } |
206 | ||
207 | void | |
affc96b5 | 208 | scm_set_port_input_waiting (long tc, int (*input_waiting) (SCM)) |
f12733c9 | 209 | { |
affc96b5 | 210 | scm_ptobs[SCM_TC2PTOBNUM (tc)].input_waiting = input_waiting; |
f12733c9 MD |
211 | } |
212 | ||
0f2d19dd | 213 | \f |
0f2d19dd | 214 | |
1bbd0b84 GB |
215 | GUILE_PROC(scm_char_ready_p, "char-ready?", 0, 1, 0, |
216 | (SCM port), | |
217 | "") | |
218 | #define FUNC_NAME s_scm_char_ready_p | |
0f2d19dd | 219 | { |
ae4c4016 | 220 | scm_port *pt; |
6c951427 | 221 | |
0f2d19dd JB |
222 | if (SCM_UNBNDP (port)) |
223 | port = scm_cur_inp; | |
224 | else | |
1bbd0b84 | 225 | SCM_VALIDATE_OPINPORT(1,port); |
d68fee48 | 226 | |
ae4c4016 JB |
227 | pt = SCM_PTAB_ENTRY (port); |
228 | ||
6c951427 GH |
229 | /* if the current read buffer is filled, or the |
230 | last pushed-back char has been read and the saved buffer is | |
231 | filled, result is true. */ | |
232 | if (pt->read_pos < pt->read_end | |
233 | || (pt->read_buf == pt->putback_buf | |
234 | && pt->saved_read_pos < pt->saved_read_end)) | |
0f2d19dd | 235 | return SCM_BOOL_T; |
ee149d03 JB |
236 | else |
237 | { | |
f12733c9 | 238 | scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
ee149d03 | 239 | |
affc96b5 | 240 | if (ptob->input_waiting) |
1bbd0b84 | 241 | return SCM_BOOL(ptob->input_waiting (port)); |
ee149d03 | 242 | else |
6c951427 | 243 | return SCM_BOOL_T; |
ee149d03 | 244 | } |
0f2d19dd | 245 | } |
1bbd0b84 | 246 | #undef FUNC_NAME |
0f2d19dd | 247 | |
6c951427 | 248 | /* Clear a port's read buffers, returning the contents. */ |
1bbd0b84 GB |
249 | GUILE_PROC (scm_drain_input, "drain-input", 1, 0, 0, |
250 | (SCM port), | |
4079f87e GB |
251 | "Drains @var{PORT}'s read buffers (including any pushed-back characters) |
252 | and returns the contents as a single string.") | |
1bbd0b84 | 253 | #define FUNC_NAME s_scm_drain_input |
ee149d03 | 254 | { |
840ae05d JB |
255 | SCM result; |
256 | scm_port *pt = SCM_PTAB_ENTRY (port); | |
6c951427 | 257 | int count; |
840ae05d | 258 | char *dst; |
ee149d03 | 259 | |
1bbd0b84 | 260 | SCM_VALIDATE_OPINPORT(1,port); |
840ae05d | 261 | |
6c951427 GH |
262 | count = pt->read_end - pt->read_pos; |
263 | if (pt->read_buf == pt->putback_buf) | |
264 | count += pt->saved_read_end - pt->saved_read_pos; | |
840ae05d | 265 | |
6c951427 GH |
266 | result = scm_makstr (count, 0); |
267 | dst = SCM_CHARS (result); | |
840ae05d JB |
268 | |
269 | while (pt->read_pos < pt->read_end) | |
6c951427 GH |
270 | *dst++ = *(pt->read_pos++); |
271 | ||
272 | if (pt->read_buf == pt->putback_buf) | |
840ae05d | 273 | { |
6c951427 GH |
274 | while (pt->saved_read_pos < pt->saved_read_end) |
275 | *dst++ = *(pt->saved_read_pos++); | |
840ae05d | 276 | } |
6c951427 | 277 | |
840ae05d | 278 | return result; |
ee149d03 | 279 | } |
1bbd0b84 | 280 | #undef FUNC_NAME |
0f2d19dd JB |
281 | |
282 | \f | |
d68fee48 | 283 | /* Standard ports --- current input, output, error, and more(!). */ |
0f2d19dd | 284 | |
1bbd0b84 GB |
285 | GUILE_PROC(scm_current_input_port, "current-input-port", 0, 0, 0, |
286 | (), | |
287 | "") | |
288 | #define FUNC_NAME s_scm_current_input_port | |
0f2d19dd JB |
289 | { |
290 | return scm_cur_inp; | |
291 | } | |
1bbd0b84 | 292 | #undef FUNC_NAME |
0f2d19dd | 293 | |
1bbd0b84 GB |
294 | GUILE_PROC(scm_current_output_port, "current-output-port", 0, 0, 0, |
295 | (), | |
296 | "") | |
297 | #define FUNC_NAME s_scm_current_output_port | |
0f2d19dd JB |
298 | { |
299 | return scm_cur_outp; | |
300 | } | |
1bbd0b84 | 301 | #undef FUNC_NAME |
0f2d19dd | 302 | |
1bbd0b84 GB |
303 | GUILE_PROC(scm_current_error_port, "current-error-port", 0, 0, 0, |
304 | (), | |
4079f87e GB |
305 | "Return the port to which errors and warnings should be sent (the |
306 | @dfn{standard error} in Unix and C terminology).") | |
1bbd0b84 | 307 | #define FUNC_NAME s_scm_current_error_port |
0f2d19dd JB |
308 | { |
309 | return scm_cur_errp; | |
310 | } | |
1bbd0b84 | 311 | #undef FUNC_NAME |
0f2d19dd | 312 | |
1bbd0b84 GB |
313 | GUILE_PROC(scm_current_load_port, "current-load-port", 0, 0, 0, |
314 | (), | |
315 | "") | |
316 | #define FUNC_NAME s_scm_current_load_port | |
31614d8e MD |
317 | { |
318 | return scm_cur_loadp; | |
319 | } | |
1bbd0b84 | 320 | #undef FUNC_NAME |
31614d8e | 321 | |
1bbd0b84 GB |
322 | GUILE_PROC(scm_set_current_input_port, "set-current-input-port", 1, 0, 0, |
323 | (SCM port), | |
4079f87e GB |
324 | "@deffnx primitive set-current-output-port port |
325 | @deffnx primitive set-current-error-port port | |
326 | Change the ports returned by @code{current-input-port}, | |
327 | @code{current-output-port} and @code{current-error-port}, respectively, | |
328 | so that they use the supplied @var{port} for input or output.") | |
1bbd0b84 | 329 | #define FUNC_NAME s_scm_set_current_input_port |
0f2d19dd JB |
330 | { |
331 | SCM oinp = scm_cur_inp; | |
1bbd0b84 | 332 | SCM_VALIDATE_OPINPORT(1,port); |
0f2d19dd JB |
333 | scm_cur_inp = port; |
334 | return oinp; | |
335 | } | |
1bbd0b84 | 336 | #undef FUNC_NAME |
0f2d19dd JB |
337 | |
338 | ||
1bbd0b84 GB |
339 | GUILE_PROC(scm_set_current_output_port, "set-current-output-port", 1, 0, 0, |
340 | (SCM port), | |
341 | "") | |
342 | #define FUNC_NAME s_scm_set_current_output_port | |
0f2d19dd JB |
343 | { |
344 | SCM ooutp = scm_cur_outp; | |
78446828 | 345 | port = SCM_COERCE_OUTPORT (port); |
1bbd0b84 | 346 | SCM_VALIDATE_OPOUTPORT(1,port); |
0f2d19dd JB |
347 | scm_cur_outp = port; |
348 | return ooutp; | |
349 | } | |
1bbd0b84 | 350 | #undef FUNC_NAME |
0f2d19dd JB |
351 | |
352 | ||
1bbd0b84 GB |
353 | GUILE_PROC(scm_set_current_error_port, "set-current-error-port", 1, 0, 0, |
354 | (SCM port), | |
355 | "") | |
356 | #define FUNC_NAME s_scm_set_current_error_port | |
0f2d19dd JB |
357 | { |
358 | SCM oerrp = scm_cur_errp; | |
78446828 | 359 | port = SCM_COERCE_OUTPORT (port); |
1bbd0b84 | 360 | SCM_VALIDATE_OPOUTPORT(1,port); |
0f2d19dd JB |
361 | scm_cur_errp = port; |
362 | return oerrp; | |
363 | } | |
1bbd0b84 | 364 | #undef FUNC_NAME |
0f2d19dd JB |
365 | |
366 | \f | |
840ae05d | 367 | /* The port table --- an array of pointers to ports. */ |
0f2d19dd | 368 | |
840ae05d | 369 | scm_port **scm_port_table; |
0f2d19dd JB |
370 | |
371 | int scm_port_table_size = 0; /* Number of ports in scm_port_table. */ | |
372 | int scm_port_table_room = 20; /* Size of the array. */ | |
373 | ||
ee149d03 | 374 | /* Add a port to the table. */ |
1cc91f1b | 375 | |
840ae05d | 376 | scm_port * |
a284e297 | 377 | scm_add_to_port_table (SCM port) |
0f2d19dd | 378 | { |
840ae05d JB |
379 | scm_port *entry; |
380 | ||
0f2d19dd JB |
381 | if (scm_port_table_size == scm_port_table_room) |
382 | { | |
ee149d03 | 383 | void *newt = realloc ((char *) scm_port_table, |
840ae05d | 384 | (scm_sizet) (sizeof (scm_port *) |
ee149d03 JB |
385 | * scm_port_table_room * 2)); |
386 | if (newt == NULL) | |
840ae05d JB |
387 | scm_memory_error ("scm_add_to_port_table"); |
388 | scm_port_table = (scm_port **) newt; | |
0f2d19dd JB |
389 | scm_port_table_room *= 2; |
390 | } | |
840ae05d JB |
391 | entry = (scm_port *) malloc (sizeof (scm_port)); |
392 | if (entry == NULL) | |
393 | scm_memory_error ("scm_add_to_port_table"); | |
394 | ||
395 | entry->port = port; | |
396 | entry->entry = scm_port_table_size; | |
397 | entry->revealed = 0; | |
398 | entry->stream = 0; | |
399 | entry->file_name = SCM_BOOL_F; | |
400 | entry->line_number = 0; | |
401 | entry->column_number = 0; | |
6c951427 GH |
402 | entry->putback_buf = 0; |
403 | entry->putback_buf_size = 0; | |
61e452ba | 404 | entry->rw_active = SCM_PORT_NEITHER; |
0de97b83 | 405 | entry->rw_random = 0; |
840ae05d JB |
406 | |
407 | scm_port_table[scm_port_table_size] = entry; | |
408 | scm_port_table_size++; | |
409 | ||
410 | return entry; | |
0f2d19dd JB |
411 | } |
412 | ||
6c951427 | 413 | /* Remove a port from the table and destroy it. */ |
1cc91f1b | 414 | |
0f2d19dd | 415 | void |
a284e297 | 416 | scm_remove_from_port_table (SCM port) |
0f2d19dd | 417 | { |
840ae05d | 418 | scm_port *p = SCM_PTAB_ENTRY (port); |
ee1e7e13 | 419 | int i = p->entry; |
6c951427 | 420 | |
ee1e7e13 MD |
421 | if (i >= scm_port_table_size) |
422 | scm_wta (port, "Port not in table", "scm_remove_from_port_table"); | |
6c951427 GH |
423 | if (p->putback_buf) |
424 | free (p->putback_buf); | |
840ae05d | 425 | free (p); |
ee1e7e13 MD |
426 | /* Since we have just freed slot i we can shrink the table by moving |
427 | the last entry to that slot... */ | |
428 | if (i < scm_port_table_size - 1) | |
0f2d19dd | 429 | { |
ee1e7e13 MD |
430 | scm_port_table[i] = scm_port_table[scm_port_table_size - 1]; |
431 | scm_port_table[i]->entry = i; | |
0f2d19dd | 432 | } |
0f2d19dd JB |
433 | SCM_SETPTAB_ENTRY (port, 0); |
434 | scm_port_table_size--; | |
435 | } | |
436 | ||
fea6b4ea | 437 | #ifdef GUILE_DEBUG |
0f2d19dd JB |
438 | /* Undocumented functions for debugging. */ |
439 | /* Return the number of ports in the table. */ | |
1cc91f1b | 440 | |
1bbd0b84 GB |
441 | GUILE_PROC(scm_pt_size, "pt-size", 0, 0, 0, |
442 | (), | |
443 | "") | |
444 | #define FUNC_NAME s_scm_pt_size | |
0f2d19dd JB |
445 | { |
446 | return SCM_MAKINUM (scm_port_table_size); | |
447 | } | |
1bbd0b84 | 448 | #undef FUNC_NAME |
0f2d19dd JB |
449 | |
450 | /* Return the ith member of the port table. */ | |
1bbd0b84 GB |
451 | GUILE_PROC(scm_pt_member, "pt-member", 1, 0, 0, |
452 | (SCM member), | |
453 | "") | |
454 | #define FUNC_NAME s_scm_pt_member | |
0f2d19dd JB |
455 | { |
456 | int i; | |
47c6b75e | 457 | SCM_VALIDATE_INUM_COPY (1,member,i); |
0f2d19dd JB |
458 | if (i < 0 || i >= scm_port_table_size) |
459 | return SCM_BOOL_F; | |
460 | else | |
461 | return scm_port_table[i]->port; | |
462 | } | |
1bbd0b84 | 463 | #undef FUNC_NAME |
0f2d19dd JB |
464 | #endif |
465 | ||
466 | ||
d68fee48 JB |
467 | \f |
468 | /* Revealed counts --- an oddity inherited from SCSH. */ | |
469 | ||
8b13c6b3 GH |
470 | /* Find a port in the table and return its revealed count. |
471 | Also used by the garbage collector. | |
0f2d19dd | 472 | */ |
1cc91f1b | 473 | |
0f2d19dd | 474 | int |
a284e297 | 475 | scm_revealed_count (SCM port) |
0f2d19dd JB |
476 | { |
477 | return SCM_REVEALED(port); | |
478 | } | |
479 | ||
480 | ||
481 | ||
482 | /* Return the revealed count for a port. */ | |
483 | ||
1bbd0b84 GB |
484 | GUILE_PROC(scm_port_revealed, "port-revealed", 1, 0, 0, |
485 | (SCM port), | |
4079f87e | 486 | "Returns the revealed count for @var{port}.") |
1bbd0b84 | 487 | #define FUNC_NAME s_scm_port_revealed |
0f2d19dd | 488 | { |
78446828 | 489 | port = SCM_COERCE_OUTPORT (port); |
1bbd0b84 | 490 | SCM_VALIDATE_PORT(1,port); |
8b13c6b3 | 491 | return SCM_MAKINUM (scm_revealed_count (port)); |
0f2d19dd | 492 | } |
1bbd0b84 | 493 | #undef FUNC_NAME |
0f2d19dd JB |
494 | |
495 | /* Set the revealed count for a port. */ | |
1bbd0b84 GB |
496 | GUILE_PROC(scm_set_port_revealed_x, "set-port-revealed!", 2, 0, 0, |
497 | (SCM port, SCM rcount), | |
4079f87e GB |
498 | "Sets the revealed count for a port to a given value. |
499 | The return value is unspecified.") | |
1bbd0b84 | 500 | #define FUNC_NAME s_scm_set_port_revealed_x |
0f2d19dd | 501 | { |
78446828 | 502 | port = SCM_COERCE_OUTPORT (port); |
1bbd0b84 | 503 | SCM_VALIDATE_PORT(1,port); |
47c6b75e | 504 | SCM_VALIDATE_INUM(2,rcount); |
0f2d19dd | 505 | SCM_REVEALED (port) = SCM_INUM (rcount); |
8b13c6b3 | 506 | return SCM_UNSPECIFIED; |
0f2d19dd | 507 | } |
1bbd0b84 | 508 | #undef FUNC_NAME |
0f2d19dd | 509 | |
d68fee48 JB |
510 | |
511 | \f | |
512 | /* Retrieving a port's mode. */ | |
513 | ||
eadd48de GH |
514 | /* Return the flags that characterize a port based on the mode |
515 | * string used to open a file for that port. | |
516 | * | |
517 | * See PORT FLAGS in scm.h | |
518 | */ | |
519 | ||
520 | long | |
a284e297 | 521 | scm_mode_bits (char *modes) |
eadd48de GH |
522 | { |
523 | return (SCM_OPN | |
524 | | (strchr (modes, 'r') || strchr (modes, '+') ? SCM_RDNG : 0) | |
525 | | ( strchr (modes, 'w') | |
526 | || strchr (modes, 'a') | |
527 | || strchr (modes, '+') ? SCM_WRTNG : 0) | |
ee149d03 JB |
528 | | (strchr (modes, '0') ? SCM_BUF0 : 0) |
529 | | (strchr (modes, 'l') ? SCM_BUFLINE : 0)); | |
eadd48de GH |
530 | } |
531 | ||
532 | ||
533 | /* Return the mode flags from an open port. | |
534 | * Some modes such as "append" are only used when opening | |
535 | * a file and are not returned here. */ | |
536 | ||
1bbd0b84 GB |
537 | GUILE_PROC(scm_port_mode, "port-mode", 1, 0, 0, |
538 | (SCM port), | |
4079f87e GB |
539 | "Returns the port modes associated with the open port @var{port}. These |
540 | will not necessarily be identical to the modes used when the port was | |
541 | opened, since modes such as \"append\" which are used only during | |
542 | port creation are not retained.") | |
1bbd0b84 | 543 | #define FUNC_NAME s_scm_port_mode |
eadd48de GH |
544 | { |
545 | char modes[3]; | |
546 | modes[0] = '\0'; | |
78446828 MV |
547 | |
548 | port = SCM_COERCE_OUTPORT (port); | |
1bbd0b84 | 549 | SCM_VALIDATE_OPPORT(1,port); |
eadd48de GH |
550 | if (SCM_CAR (port) & SCM_RDNG) { |
551 | if (SCM_CAR (port) & SCM_WRTNG) | |
552 | strcpy (modes, "r+"); | |
553 | else | |
554 | strcpy (modes, "r"); | |
555 | } | |
556 | else if (SCM_CAR (port) & SCM_WRTNG) | |
557 | strcpy (modes, "w"); | |
558 | if (SCM_CAR (port) & SCM_BUF0) | |
559 | strcat (modes, "0"); | |
560 | return scm_makfromstr (modes, strlen (modes), 0); | |
561 | } | |
1bbd0b84 | 562 | #undef FUNC_NAME |
eadd48de GH |
563 | |
564 | ||
d68fee48 JB |
565 | \f |
566 | /* Closing ports. */ | |
567 | ||
0f2d19dd JB |
568 | /* scm_close_port |
569 | * Call the close operation on a port object. | |
eadd48de | 570 | * see also scm_close. |
0f2d19dd | 571 | */ |
1bbd0b84 GB |
572 | GUILE_PROC(scm_close_port, "close-port", 1, 0, 0, |
573 | (SCM port), | |
4079f87e GB |
574 | "Close the specified port object. Returns @code{#t} if it successfully |
575 | closes a port or @code{#f} if it was already | |
576 | closed. An exception may be raised if an error occurs, for example | |
577 | when flushing buffered output. | |
578 | See also @ref{Ports and File Descriptors, close}, for a procedure | |
579 | which can close file descriptors.") | |
1bbd0b84 | 580 | #define FUNC_NAME s_scm_close_port |
0f2d19dd JB |
581 | { |
582 | scm_sizet i; | |
eadd48de GH |
583 | int rv; |
584 | ||
78446828 MV |
585 | port = SCM_COERCE_OUTPORT (port); |
586 | ||
1bbd0b84 | 587 | SCM_VALIDATE_PORT(1,port); |
0f2d19dd | 588 | if (SCM_CLOSEDP (port)) |
eadd48de | 589 | return SCM_BOOL_F; |
0f2d19dd | 590 | i = SCM_PTOBNUM (port); |
affc96b5 GH |
591 | if (scm_ptobs[i].close) |
592 | rv = (scm_ptobs[i].close) (port); | |
eadd48de GH |
593 | else |
594 | rv = 0; | |
0f2d19dd | 595 | scm_remove_from_port_table (port); |
898a256f | 596 | SCM_SETAND_CAR (port, ~SCM_OPN); |
1bbd0b84 | 597 | return SCM_NEGATE_BOOL(rv < 0); |
0f2d19dd | 598 | } |
1bbd0b84 | 599 | #undef FUNC_NAME |
0f2d19dd | 600 | |
1bbd0b84 GB |
601 | GUILE_PROC(scm_close_all_ports_except, "close-all-ports-except", 0, 0, 1, |
602 | (SCM ports), | |
4079f87e GB |
603 | "Close all open file ports used by the interpreter |
604 | except for those supplied as arguments. This procedure | |
605 | is intended to be used before an exec call to close file descriptors | |
606 | which are not needed in the new process.Close all open file ports used by the interpreter | |
607 | except for those supplied as arguments. This procedure | |
608 | is intended to be used before an exec call to close file descriptors | |
609 | which are not needed in the new process.") | |
1bbd0b84 | 610 | #define FUNC_NAME s_scm_close_all_ports_except |
0f2d19dd JB |
611 | { |
612 | int i = 0; | |
30939477 | 613 | SCM_VALIDATE_CONS(1,ports); |
0f2d19dd JB |
614 | while (i < scm_port_table_size) |
615 | { | |
616 | SCM thisport = scm_port_table[i]->port; | |
617 | int found = 0; | |
618 | SCM ports_ptr = ports; | |
619 | ||
620 | while (SCM_NNULLP (ports_ptr)) | |
621 | { | |
78446828 | 622 | SCM port = SCM_COERCE_OUTPORT (SCM_CAR (ports_ptr)); |
0f2d19dd | 623 | if (i == 0) |
cdc95767 | 624 | SCM_VALIDATE_OPPORT(SCM_ARG1,port); |
0f2d19dd JB |
625 | if (port == thisport) |
626 | found = 1; | |
627 | ports_ptr = SCM_CDR (ports_ptr); | |
628 | } | |
629 | if (found) | |
630 | i++; | |
631 | else | |
632 | /* i is not to be incremented here. */ | |
633 | scm_close_port (thisport); | |
634 | } | |
0f2d19dd JB |
635 | return SCM_UNSPECIFIED; |
636 | } | |
1bbd0b84 | 637 | #undef FUNC_NAME |
0f2d19dd | 638 | |
d68fee48 JB |
639 | |
640 | \f | |
641 | /* Utter miscellany. Gosh, we should clean this up some time. */ | |
642 | ||
1bbd0b84 GB |
643 | GUILE_PROC(scm_input_port_p, "input-port?", 1, 0, 0, |
644 | (SCM x), | |
645 | "") | |
646 | #define FUNC_NAME s_scm_input_port_p | |
0f2d19dd JB |
647 | { |
648 | if (SCM_IMP (x)) | |
4a94d8ca | 649 | return SCM_BOOL_F; |
1bbd0b84 | 650 | return SCM_BOOL(SCM_INPORTP (x)); |
0f2d19dd | 651 | } |
1bbd0b84 | 652 | #undef FUNC_NAME |
0f2d19dd | 653 | |
1bbd0b84 GB |
654 | GUILE_PROC(scm_output_port_p, "output-port?", 1, 0, 0, |
655 | (SCM x), | |
656 | "") | |
657 | #define FUNC_NAME s_scm_output_port_p | |
0f2d19dd JB |
658 | { |
659 | if (SCM_IMP (x)) | |
4a94d8ca MD |
660 | return SCM_BOOL_F; |
661 | if (SCM_PORT_WITH_PS_P (x)) | |
662 | x = SCM_PORT_WITH_PS_PORT (x); | |
1bbd0b84 | 663 | return SCM_BOOL(SCM_OUTPORTP (x)); |
0f2d19dd | 664 | } |
1bbd0b84 | 665 | #undef FUNC_NAME |
0f2d19dd | 666 | |
1bbd0b84 GB |
667 | GUILE_PROC(scm_port_closed_p, "port-closed?", 1, 0, 0, |
668 | (SCM port), | |
4079f87e | 669 | "Returns @code{#t} if @var{port} is closed or @code{#f} if it is open.") |
1bbd0b84 | 670 | #define FUNC_NAME s_scm_port_closed_p |
60d0643d | 671 | { |
1bbd0b84 GB |
672 | SCM_VALIDATE_OPPORT(1,port); |
673 | return SCM_NEGATE_BOOL(SCM_OPPORTP (port)); | |
60d0643d | 674 | } |
1bbd0b84 | 675 | #undef FUNC_NAME |
0f2d19dd | 676 | |
1bbd0b84 GB |
677 | GUILE_PROC(scm_eof_object_p, "eof-object?", 1, 0, 0, |
678 | (SCM x), | |
679 | "") | |
680 | #define FUNC_NAME s_scm_eof_object_p | |
0f2d19dd | 681 | { |
1bbd0b84 | 682 | return SCM_BOOL(SCM_EOF_OBJECT_P (x)); |
0f2d19dd | 683 | } |
1bbd0b84 | 684 | #undef FUNC_NAME |
0f2d19dd | 685 | |
1bbd0b84 GB |
686 | GUILE_PROC(scm_force_output, "force-output", 0, 1, 0, |
687 | (SCM port), | |
4079f87e GB |
688 | "Flush the specified output port, or the current output port if @var{port} |
689 | is omitted. The current output buffer contents are passed to the | |
690 | underlying port implementation (e.g., in the case of fports, the | |
691 | data will be written to the file and the output buffer will be cleared.) | |
692 | It has no effect on an unbuffered port. | |
693 | ||
694 | The return value is unspecified.") | |
1bbd0b84 | 695 | #define FUNC_NAME s_scm_force_output |
0f2d19dd JB |
696 | { |
697 | if (SCM_UNBNDP (port)) | |
3e877d15 | 698 | port = scm_cur_outp; |
0f2d19dd | 699 | else |
78446828 MV |
700 | { |
701 | port = SCM_COERCE_OUTPORT (port); | |
1bbd0b84 | 702 | SCM_VALIDATE_OPOUTPORT(1,port); |
78446828 | 703 | } |
affc96b5 | 704 | scm_flush (port); |
ee149d03 | 705 | return SCM_UNSPECIFIED; |
0f2d19dd | 706 | } |
1bbd0b84 | 707 | #undef FUNC_NAME |
0f2d19dd | 708 | |
1bbd0b84 GB |
709 | GUILE_PROC (scm_flush_all_ports, "flush-all-ports", 0, 0, 0, |
710 | (), | |
4079f87e GB |
711 | "Equivalent to calling @code{force-output} on |
712 | all open output ports. The return value is unspecified.") | |
1bbd0b84 | 713 | #define FUNC_NAME s_scm_flush_all_ports |
89ea5b7c GH |
714 | { |
715 | int i; | |
716 | ||
717 | for (i = 0; i < scm_port_table_size; i++) | |
718 | { | |
ee149d03 | 719 | if (SCM_OPOUTPORTP (scm_port_table[i]->port)) |
affc96b5 | 720 | scm_flush (scm_port_table[i]->port); |
89ea5b7c GH |
721 | } |
722 | return SCM_UNSPECIFIED; | |
723 | } | |
1bbd0b84 | 724 | #undef FUNC_NAME |
0f2d19dd | 725 | |
1bbd0b84 GB |
726 | GUILE_PROC(scm_read_char, "read-char", 0, 1, 0, |
727 | (SCM port), | |
728 | "") | |
729 | #define FUNC_NAME s_scm_read_char | |
0f2d19dd JB |
730 | { |
731 | int c; | |
732 | if (SCM_UNBNDP (port)) | |
334341aa | 733 | port = scm_cur_inp; |
1bbd0b84 | 734 | SCM_VALIDATE_OPINPORT(1,port); |
b7f3516f | 735 | c = scm_getc (port); |
0f2d19dd JB |
736 | if (EOF == c) |
737 | return SCM_EOF_VAL; | |
738 | return SCM_MAKICHR (c); | |
739 | } | |
1bbd0b84 | 740 | #undef FUNC_NAME |
0f2d19dd | 741 | |
5c070ca7 | 742 | /* this should only be called when the read buffer is empty. it |
affc96b5 | 743 | tries to refill the read buffer. it returns the first char from |
5c070ca7 | 744 | the port, which is either EOF or *(pt->read_pos). */ |
6c951427 | 745 | int |
affc96b5 | 746 | scm_fill_input (SCM port) |
6c951427 | 747 | { |
283a1a0e GH |
748 | scm_port *pt = SCM_PTAB_ENTRY (port); |
749 | ||
6c951427 GH |
750 | if (pt->read_buf == pt->putback_buf) |
751 | { | |
752 | /* finished reading put-back chars. */ | |
753 | pt->read_buf = pt->saved_read_buf; | |
754 | pt->read_pos = pt->saved_read_pos; | |
755 | pt->read_end = pt->saved_read_end; | |
756 | pt->read_buf_size = pt->saved_read_buf_size; | |
757 | if (pt->read_pos < pt->read_end) | |
5c070ca7 | 758 | return *(pt->read_pos); |
6c951427 | 759 | } |
affc96b5 | 760 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
6c951427 GH |
761 | } |
762 | ||
ee149d03 | 763 | int |
a284e297 | 764 | scm_getc (SCM port) |
0f2d19dd JB |
765 | { |
766 | int c; | |
840ae05d | 767 | scm_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 | 768 | |
840ae05d JB |
769 | if (pt->rw_active == SCM_PORT_WRITE) |
770 | { | |
affc96b5 GH |
771 | /* may be marginally faster than calling scm_flush. */ |
772 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
840ae05d | 773 | } |
6c951427 | 774 | |
5c070ca7 GH |
775 | if (pt->rw_random) |
776 | pt->rw_active = SCM_PORT_READ; | |
777 | ||
778 | if (pt->read_pos >= pt->read_end) | |
ee149d03 | 779 | { |
affc96b5 | 780 | if (scm_fill_input (port) == EOF) |
5c070ca7 | 781 | return EOF; |
ee149d03 JB |
782 | } |
783 | ||
5c070ca7 | 784 | c = *(pt->read_pos++); |
840ae05d | 785 | |
ee149d03 JB |
786 | if (c == '\n') |
787 | { | |
788 | SCM_INCLINE (port); | |
789 | } | |
790 | else if (c == '\t') | |
791 | { | |
792 | SCM_TABCOL (port); | |
793 | } | |
794 | else | |
795 | { | |
796 | SCM_INCCOL (port); | |
797 | } | |
798 | ||
799 | return c; | |
0f2d19dd JB |
800 | } |
801 | ||
ee149d03 | 802 | void |
a284e297 | 803 | scm_putc (char c, SCM port) |
ee149d03 | 804 | { |
265e6a4d | 805 | scm_lfwrite (&c, 1, port); |
ee149d03 | 806 | } |
3cb988bd | 807 | |
ee149d03 | 808 | void |
a284e297 | 809 | scm_puts (char *s, SCM port) |
3cb988bd | 810 | { |
265e6a4d | 811 | scm_lfwrite (s, strlen (s), port); |
ee149d03 | 812 | } |
3cb988bd | 813 | |
ee149d03 | 814 | void |
a284e297 | 815 | scm_lfwrite (char *ptr, scm_sizet size, SCM port) |
ee149d03 | 816 | { |
840ae05d | 817 | scm_port *pt = SCM_PTAB_ENTRY (port); |
f12733c9 | 818 | scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
3e2043c4 | 819 | |
840ae05d | 820 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 821 | scm_end_input (port); |
283a1a0e | 822 | |
31703ab8 | 823 | ptob->write (port, ptr, size); |
840ae05d JB |
824 | |
825 | if (pt->rw_random) | |
826 | pt->rw_active = SCM_PORT_WRITE; | |
ee149d03 | 827 | } |
3cb988bd | 828 | |
3cb988bd | 829 | |
ee149d03 | 830 | void |
a284e297 | 831 | scm_flush (SCM port) |
ee149d03 JB |
832 | { |
833 | scm_sizet i = SCM_PTOBNUM (port); | |
affc96b5 | 834 | (scm_ptobs[i].flush) (port); |
ee149d03 JB |
835 | } |
836 | ||
283a1a0e | 837 | void |
a284e297 | 838 | scm_end_input (SCM port) |
283a1a0e GH |
839 | { |
840 | int offset; | |
841 | scm_port *pt = SCM_PTAB_ENTRY (port); | |
842 | ||
843 | if (pt->read_buf == pt->putback_buf) | |
844 | { | |
845 | offset = pt->read_end - pt->read_pos; | |
846 | pt->read_buf = pt->saved_read_buf; | |
847 | pt->read_pos = pt->saved_read_pos; | |
848 | pt->read_end = pt->saved_read_end; | |
849 | pt->read_buf_size = pt->saved_read_buf_size; | |
850 | } | |
851 | else | |
852 | offset = 0; | |
853 | ||
affc96b5 | 854 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
283a1a0e GH |
855 | } |
856 | ||
ee149d03 JB |
857 | \f |
858 | ||
859 | ||
860 | void | |
a284e297 | 861 | scm_ungetc (int c, SCM port) |
ee149d03 | 862 | { |
840ae05d JB |
863 | scm_port *pt = SCM_PTAB_ENTRY (port); |
864 | ||
6c951427 GH |
865 | if (pt->read_buf == pt->putback_buf) |
866 | /* already using the put-back buffer. */ | |
867 | { | |
868 | /* enlarge putback_buf if necessary. */ | |
869 | if (pt->read_end == pt->read_buf + pt->read_buf_size | |
870 | && pt->read_buf == pt->read_pos) | |
871 | { | |
872 | int new_size = pt->read_buf_size * 2; | |
873 | unsigned char *tmp = | |
874 | (unsigned char *) realloc (pt->putback_buf, new_size); | |
875 | ||
876 | if (tmp == NULL) | |
877 | scm_memory_error ("scm_ungetc"); | |
878 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; | |
879 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
880 | pt->read_buf_size = pt->putback_buf_size = new_size; | |
881 | } | |
882 | ||
883 | /* shift any existing bytes to buffer + 1. */ | |
884 | if (pt->read_pos == pt->read_end) | |
885 | pt->read_end = pt->read_buf + 1; | |
886 | else if (pt->read_pos != pt->read_buf + 1) | |
887 | { | |
888 | int count = pt->read_end - pt->read_pos; | |
889 | ||
890 | memmove (pt->read_buf + 1, pt->read_pos, count); | |
891 | pt->read_end = pt->read_buf + 1 + count; | |
892 | } | |
893 | ||
894 | pt->read_pos = pt->read_buf; | |
895 | } | |
896 | else | |
897 | /* switch to the put-back buffer. */ | |
898 | { | |
899 | if (pt->putback_buf == NULL) | |
900 | { | |
6e2e75db | 901 | pt->putback_buf = (char *) malloc (SCM_INITIAL_PUTBACK_BUF_SIZE); |
6c951427 GH |
902 | if (pt->putback_buf == NULL) |
903 | scm_memory_error ("scm_ungetc"); | |
904 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; | |
905 | } | |
906 | ||
907 | pt->saved_read_buf = pt->read_buf; | |
908 | pt->saved_read_pos = pt->read_pos; | |
909 | pt->saved_read_end = pt->read_end; | |
910 | pt->saved_read_buf_size = pt->read_buf_size; | |
911 | ||
912 | pt->read_pos = pt->read_buf = pt->putback_buf; | |
913 | pt->read_end = pt->read_buf + 1; | |
914 | pt->read_buf_size = pt->putback_buf_size; | |
915 | } | |
916 | ||
917 | *pt->read_buf = c; | |
ee149d03 | 918 | |
840ae05d JB |
919 | if (pt->rw_random) |
920 | pt->rw_active = SCM_PORT_READ; | |
921 | ||
ee149d03 JB |
922 | if (c == '\n') |
923 | { | |
924 | /* What should col be in this case? | |
925 | * We'll leave it at -1. | |
926 | */ | |
927 | SCM_LINUM (port) -= 1; | |
928 | } | |
929 | else | |
930 | SCM_COL(port) -= 1; | |
931 | } | |
932 | ||
933 | ||
934 | void | |
a284e297 | 935 | scm_ungets (char *s, int n, SCM port) |
ee149d03 JB |
936 | { |
937 | /* This is simple minded and inefficient, but unreading strings is | |
938 | * probably not a common operation, and remember that line and | |
939 | * column numbers have to be handled... | |
940 | * | |
941 | * Please feel free to write an optimized version! | |
942 | */ | |
943 | while (n--) | |
944 | scm_ungetc (s[n], port); | |
945 | } | |
946 | ||
947 | ||
1bbd0b84 GB |
948 | GUILE_PROC(scm_peek_char, "peek-char", 0, 1, 0, |
949 | (SCM port), | |
950 | "") | |
951 | #define FUNC_NAME s_scm_peek_char | |
ee149d03 JB |
952 | { |
953 | int c; | |
954 | if (SCM_UNBNDP (port)) | |
955 | port = scm_cur_inp; | |
956 | else | |
1bbd0b84 | 957 | SCM_VALIDATE_OPINPORT(1,port); |
ee149d03 JB |
958 | c = scm_getc (port); |
959 | if (EOF == c) | |
960 | return SCM_EOF_VAL; | |
961 | scm_ungetc (c, port); | |
962 | return SCM_MAKICHR (c); | |
3cb988bd | 963 | } |
1bbd0b84 | 964 | #undef FUNC_NAME |
3cb988bd | 965 | |
1bbd0b84 GB |
966 | GUILE_PROC (scm_unread_char, "unread-char", 2, 0, 0, |
967 | (SCM cobj, SCM port), | |
4079f87e GB |
968 | "Place @var{char} in @var{port} so that it will be read by the |
969 | next read operation. If called multiple times, the unread characters | |
970 | will be read again in last-in first-out order. If @var{port} is | |
971 | not supplied, the current input port is used.") | |
1bbd0b84 | 972 | #define FUNC_NAME s_scm_unread_char |
0f2d19dd JB |
973 | { |
974 | int c; | |
975 | ||
1bbd0b84 | 976 | SCM_VALIDATE_CHAR(1,cobj); |
0f2d19dd JB |
977 | if (SCM_UNBNDP (port)) |
978 | port = scm_cur_inp; | |
979 | else | |
cfaba30e | 980 | SCM_VALIDATE_OPINPORT(2,port); |
0f2d19dd JB |
981 | |
982 | c = SCM_ICHR (cobj); | |
983 | ||
b7f3516f | 984 | scm_ungetc (c, port); |
0f2d19dd JB |
985 | return cobj; |
986 | } | |
1bbd0b84 | 987 | #undef FUNC_NAME |
0f2d19dd | 988 | |
1bbd0b84 GB |
989 | GUILE_PROC (scm_unread_string, "unread-string", 2, 0, 0, |
990 | (SCM str, SCM port), | |
4079f87e GB |
991 | "Place the string @var{str} in @var{port} so that its characters will be |
992 | read in subsequent read operations. If called multiple times, the | |
993 | unread characters will be read again in last-in first-out order. If | |
994 | @var{port} is not supplied, the current-input-port is used.") | |
1bbd0b84 | 995 | #define FUNC_NAME s_scm_unread_string |
ee1e7e13 | 996 | { |
1bbd0b84 | 997 | SCM_VALIDATE_STRING(1,str); |
ee1e7e13 MD |
998 | if (SCM_UNBNDP (port)) |
999 | port = scm_cur_inp; | |
1000 | else | |
cfaba30e | 1001 | SCM_VALIDATE_OPINPORT(2,port); |
ee1e7e13 | 1002 | |
d1c90db5 | 1003 | scm_ungets (SCM_ROUCHARS (str), SCM_LENGTH (str), port); |
ee1e7e13 MD |
1004 | |
1005 | return str; | |
1006 | } | |
1bbd0b84 | 1007 | #undef FUNC_NAME |
ee1e7e13 | 1008 | |
1bbd0b84 GB |
1009 | GUILE_PROC (scm_seek, "seek", 3, 0, 0, |
1010 | (SCM object, SCM offset, SCM whence), | |
4079f87e GB |
1011 | "Sets the current position of @var{fd/port} to the integer @var{offset}, |
1012 | which is interpreted according to the value of @var{whence}. | |
1013 | ||
1014 | One of the following variables should be supplied | |
1015 | for @var{whence}: | |
1016 | @defvar SEEK_SET | |
1017 | Seek from the beginning of the file. | |
1018 | @end defvar | |
1019 | @defvar SEEK_CUR | |
1020 | Seek from the current position. | |
1021 | @end defvar | |
1022 | @defvar SEEK_END | |
1023 | Seek from the end of the file. | |
1024 | @end defvar | |
1025 | ||
1026 | If @var{fd/port} is a file descriptor, the underlying system call is | |
1027 | @code{lseek}. @var{port} may be a string port. | |
1028 | ||
1029 | The value returned is the new position in the file. This means that | |
1030 | the current position of a port can be obtained using: | |
1031 | @smalllisp | |
1032 | (seek port 0 SEEK_CUR) | |
1033 | @end smalllisp") | |
1bbd0b84 | 1034 | #define FUNC_NAME s_scm_seek |
840ae05d JB |
1035 | { |
1036 | off_t off; | |
1037 | off_t rv; | |
1038 | int how; | |
1039 | ||
1040 | object = SCM_COERCE_OUTPORT (object); | |
1041 | ||
1bbd0b84 | 1042 | off = SCM_NUM2LONG (2,offset); |
47c6b75e | 1043 | SCM_VALIDATE_INUM_COPY(3,whence,how); |
840ae05d | 1044 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) |
1bbd0b84 | 1045 | SCM_OUT_OF_RANGE (3, whence); |
0c95b57d | 1046 | if (SCM_OPPORTP (object)) |
840ae05d | 1047 | { |
f12733c9 | 1048 | scm_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); |
840ae05d JB |
1049 | |
1050 | if (!ptob->seek) | |
1bbd0b84 GB |
1051 | SCM_MISC_ERROR ("port is not seekable", |
1052 | scm_cons (object, SCM_EOL)); | |
840ae05d | 1053 | else |
7dcb364d | 1054 | rv = ptob->seek (object, off, how); |
840ae05d JB |
1055 | } |
1056 | else /* file descriptor?. */ | |
1057 | { | |
47c6b75e | 1058 | SCM_VALIDATE_INUM(1,object); |
840ae05d JB |
1059 | rv = lseek (SCM_INUM (object), off, how); |
1060 | if (rv == -1) | |
1bbd0b84 | 1061 | SCM_SYSERROR; |
840ae05d JB |
1062 | } |
1063 | return scm_long2num (rv); | |
1064 | } | |
1bbd0b84 | 1065 | #undef FUNC_NAME |
840ae05d | 1066 | |
1bbd0b84 GB |
1067 | GUILE_PROC (scm_truncate_file, "truncate-file", 1, 1, 0, |
1068 | (SCM object, SCM length), | |
4079f87e GB |
1069 | "Truncates the object referred to by @var{obj} to at most @var{size} bytes. |
1070 | @var{obj} can be a string containing a file name or an integer file | |
1071 | descriptor or a port. @var{size} may be omitted if @var{obj} is not | |
1072 | a file name, in which case the truncation occurs at the current port. | |
1073 | position. | |
1074 | ||
1075 | The return value is unspecified.") | |
1bbd0b84 | 1076 | #define FUNC_NAME s_scm_truncate_file |
840ae05d | 1077 | { |
69bc9ff3 GH |
1078 | int rv; |
1079 | off_t c_length; | |
1080 | ||
1081 | /* object can be a port, fdes or filename. */ | |
840ae05d | 1082 | |
840ae05d JB |
1083 | if (SCM_UNBNDP (length)) |
1084 | { | |
69bc9ff3 | 1085 | /* must supply length if object is a filename. */ |
0c95b57d | 1086 | if (SCM_ROSTRINGP (object)) |
1bbd0b84 | 1087 | scm_wrong_num_args (SCM_FUNC_NAME); |
69bc9ff3 | 1088 | |
c94577b4 | 1089 | length = scm_seek (object, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); |
840ae05d | 1090 | } |
1bbd0b84 | 1091 | c_length = SCM_NUM2LONG (2,length); |
69bc9ff3 | 1092 | if (c_length < 0) |
1bbd0b84 | 1093 | SCM_MISC_ERROR ("negative offset", SCM_EOL); |
3fe6190f | 1094 | |
69bc9ff3 GH |
1095 | object = SCM_COERCE_OUTPORT (object); |
1096 | if (SCM_INUMP (object)) | |
1097 | { | |
1098 | SCM_SYSCALL (rv = ftruncate (SCM_INUM (object), c_length)); | |
1099 | } | |
0c95b57d | 1100 | else if (SCM_OPOUTPORTP (object)) |
69bc9ff3 GH |
1101 | { |
1102 | scm_port *pt = SCM_PTAB_ENTRY (object); | |
f12733c9 | 1103 | scm_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); |
69bc9ff3 | 1104 | |
affc96b5 | 1105 | if (!ptob->truncate) |
1bbd0b84 | 1106 | SCM_MISC_ERROR ("port is not truncatable", SCM_EOL); |
69bc9ff3 | 1107 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1108 | scm_end_input (object); |
69bc9ff3 | 1109 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1110 | ptob->flush (object); |
69bc9ff3 | 1111 | |
affc96b5 | 1112 | ptob->truncate (object, c_length); |
69bc9ff3 GH |
1113 | rv = 0; |
1114 | } | |
1115 | else | |
1116 | { | |
1bbd0b84 | 1117 | SCM_VALIDATE_ROSTRING(1,object); |
69bc9ff3 GH |
1118 | SCM_COERCE_SUBSTR (object); |
1119 | SCM_SYSCALL (rv = truncate (SCM_ROCHARS (object), c_length)); | |
1120 | } | |
1121 | if (rv == -1) | |
1bbd0b84 | 1122 | SCM_SYSERROR; |
840ae05d JB |
1123 | return SCM_UNSPECIFIED; |
1124 | } | |
1bbd0b84 | 1125 | #undef FUNC_NAME |
840ae05d | 1126 | |
1bbd0b84 GB |
1127 | GUILE_PROC (scm_port_line, "port-line", 1, 0, 0, |
1128 | (SCM port), | |
1129 | "") | |
1130 | #define FUNC_NAME s_scm_port_line | |
0f2d19dd | 1131 | { |
78446828 | 1132 | port = SCM_COERCE_OUTPORT (port); |
1bbd0b84 | 1133 | SCM_VALIDATE_OPENPORT(1,port); |
360fc44c | 1134 | return SCM_MAKINUM (SCM_LINUM (port)); |
0f2d19dd | 1135 | } |
1bbd0b84 | 1136 | #undef FUNC_NAME |
0f2d19dd | 1137 | |
1bbd0b84 GB |
1138 | GUILE_PROC (scm_set_port_line_x, "set-port-line!", 2, 0, 0, |
1139 | (SCM port, SCM line), | |
1140 | "") | |
1141 | #define FUNC_NAME s_scm_set_port_line_x | |
d043d8c2 | 1142 | { |
360fc44c | 1143 | port = SCM_COERCE_OUTPORT (port); |
1bbd0b84 | 1144 | SCM_VALIDATE_OPENPORT(1,port); |
47c6b75e | 1145 | SCM_VALIDATE_INUM(2,line); |
d043d8c2 MD |
1146 | return SCM_PTAB_ENTRY (port)->line_number = SCM_INUM (line); |
1147 | } | |
1bbd0b84 | 1148 | #undef FUNC_NAME |
d043d8c2 | 1149 | |
1bbd0b84 GB |
1150 | GUILE_PROC (scm_port_column, "port-column", 1, 0, 0, |
1151 | (SCM port), | |
4079f87e GB |
1152 | "@deffnx primitive port-line [input-port] |
1153 | Return the current column number or line number of @var{input-port}, | |
1154 | using the current input port if none is specified. If the number is | |
1155 | unknown, the result is #f. Otherwise, the result is a 0-origin integer | |
1156 | - i.e. the first character of the first line is line 0, column 0. | |
1157 | (However, when you display a file position, for example in an error | |
1158 | message, we recommand you add 1 to get 1-origin integers. This is | |
1159 | because lines and column numbers traditionally start with 1, and that is | |
1160 | what non-programmers will find most natural.)") | |
1bbd0b84 | 1161 | #define FUNC_NAME s_scm_port_column |
0f2d19dd | 1162 | { |
78446828 | 1163 | port = SCM_COERCE_OUTPORT (port); |
1bbd0b84 | 1164 | SCM_VALIDATE_OPENPORT(1,port); |
360fc44c | 1165 | return SCM_MAKINUM (SCM_COL (port)); |
0f2d19dd | 1166 | } |
1bbd0b84 | 1167 | #undef FUNC_NAME |
0f2d19dd | 1168 | |
1bbd0b84 GB |
1169 | GUILE_PROC (scm_set_port_column_x, "set-port-column!", 2, 0, 0, |
1170 | (SCM port, SCM column), | |
4079f87e GB |
1171 | "@deffnx primitive set-port-line! [input-port] line |
1172 | Set the current column or line number of @var{input-port}, using the | |
1173 | current input port if none is specified.") | |
1bbd0b84 | 1174 | #define FUNC_NAME s_scm_set_port_column_x |
d043d8c2 | 1175 | { |
360fc44c | 1176 | port = SCM_COERCE_OUTPORT (port); |
1bbd0b84 | 1177 | SCM_VALIDATE_OPENPORT(1,port); |
47c6b75e | 1178 | SCM_VALIDATE_INUM(2,column); |
d043d8c2 MD |
1179 | return SCM_PTAB_ENTRY (port)->column_number = SCM_INUM (column); |
1180 | } | |
1bbd0b84 | 1181 | #undef FUNC_NAME |
d043d8c2 | 1182 | |
1bbd0b84 GB |
1183 | GUILE_PROC (scm_port_filename, "port-filename", 1, 0, 0, |
1184 | (SCM port), | |
4079f87e GB |
1185 | "Return the filename associated with @var{port}. This function returns |
1186 | the strings "standard input", "standard output" and "standard error" | |
1187 | when called on the current input, output and error ports respectively.") | |
1bbd0b84 | 1188 | #define FUNC_NAME s_scm_port_filename |
0f2d19dd | 1189 | { |
78446828 | 1190 | port = SCM_COERCE_OUTPORT (port); |
1bbd0b84 | 1191 | SCM_VALIDATE_OPENPORT(1,port); |
360fc44c | 1192 | return SCM_PTAB_ENTRY (port)->file_name; |
0f2d19dd | 1193 | } |
1bbd0b84 | 1194 | #undef FUNC_NAME |
0f2d19dd | 1195 | |
1bbd0b84 GB |
1196 | GUILE_PROC (scm_set_port_filename_x, "set-port-filename!", 2, 0, 0, |
1197 | (SCM port, SCM filename), | |
4079f87e GB |
1198 | "Change the filename associated with @var{port}, using the current input |
1199 | port if none is specified. Note that this does not change the port's | |
1200 | source of data, but only the value that is returned by | |
1201 | @code{port-filename} and reported in diagnostic output.") | |
1bbd0b84 | 1202 | #define FUNC_NAME s_scm_set_port_filename_x |
d14af9f2 | 1203 | { |
360fc44c | 1204 | port = SCM_COERCE_OUTPORT (port); |
1bbd0b84 | 1205 | SCM_VALIDATE_OPENPORT(1,port); |
360fc44c | 1206 | /* We allow the user to set the filename to whatever he likes. */ |
d14af9f2 MD |
1207 | return SCM_PTAB_ENTRY (port)->file_name = filename; |
1208 | } | |
1bbd0b84 | 1209 | #undef FUNC_NAME |
d14af9f2 | 1210 | |
0f2d19dd JB |
1211 | #ifndef ttyname |
1212 | extern char * ttyname(); | |
1213 | #endif | |
1214 | ||
f12733c9 MD |
1215 | void |
1216 | scm_print_port_mode (SCM exp, SCM port) | |
1217 | { | |
1218 | scm_puts (SCM_CLOSEDP (exp) | |
1219 | ? "closed: " | |
1220 | : (SCM_RDNG & SCM_CAR (exp) | |
1221 | ? (SCM_WRTNG & SCM_CAR (exp) | |
1222 | ? "input-output: " | |
1223 | : "input: ") | |
1224 | : (SCM_WRTNG & SCM_CAR (exp) | |
1225 | ? "output: " | |
1226 | : "bogus: ")), | |
1227 | port); | |
1228 | } | |
1cc91f1b | 1229 | |
f12733c9 MD |
1230 | int |
1231 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate) | |
0f2d19dd | 1232 | { |
f12733c9 MD |
1233 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
1234 | if (!type) | |
1235 | type = "port"; | |
b7f3516f | 1236 | scm_puts ("#<", port); |
f12733c9 | 1237 | scm_print_port_mode (exp, port); |
b7f3516f TT |
1238 | scm_puts (type, port); |
1239 | scm_putc (' ', port); | |
f12733c9 | 1240 | scm_intprint (SCM_CDR (exp), 16, port); |
b7f3516f | 1241 | scm_putc ('>', port); |
f12733c9 | 1242 | return 1; |
0f2d19dd JB |
1243 | } |
1244 | ||
f12733c9 MD |
1245 | extern void scm_make_fptob (); |
1246 | extern void scm_make_stptob (); | |
1247 | extern void scm_make_sfptob (); | |
1cc91f1b | 1248 | |
0f2d19dd JB |
1249 | void |
1250 | scm_ports_prehistory () | |
0f2d19dd JB |
1251 | { |
1252 | scm_numptob = 0; | |
f12733c9 | 1253 | scm_ptobs = (scm_ptob_descriptor *) malloc (sizeof (scm_ptob_descriptor)); |
0f2d19dd JB |
1254 | |
1255 | /* WARNING: These scm_newptob calls must be done in this order. | |
1256 | * They must agree with the port declarations in tags.h. | |
1257 | */ | |
f12733c9 MD |
1258 | /* scm_tc16_fport = */ scm_make_fptob (); |
1259 | /* scm_tc16_pipe was here */ scm_make_fptob (); /* dummy. */ | |
1260 | /* scm_tc16_strport = */ scm_make_stptob (); | |
1261 | /* scm_tc16_sfport = */ scm_make_sfptob (); | |
0f2d19dd | 1262 | } |
0f2d19dd JB |
1263 | |
1264 | \f | |
ee149d03 | 1265 | |
d68fee48 | 1266 | /* Void ports. */ |
0f2d19dd | 1267 | |
f12733c9 | 1268 | long scm_tc16_void_port = 0; |
0f2d19dd | 1269 | |
ee149d03 | 1270 | static void |
0f88a8f3 | 1271 | flush_void_port (SCM port) |
0f2d19dd | 1272 | { |
3cb988bd | 1273 | } |
1cc91f1b | 1274 | |
283a1a0e | 1275 | static void |
affc96b5 | 1276 | end_input_void_port (SCM port, int offset) |
283a1a0e GH |
1277 | { |
1278 | } | |
1279 | ||
31703ab8 GH |
1280 | static void |
1281 | write_void_port (SCM port, void *data, size_t size) | |
1282 | { | |
1283 | } | |
1284 | ||
0f2d19dd | 1285 | SCM |
a284e297 | 1286 | scm_void_port (char *mode_str) |
0f2d19dd JB |
1287 | { |
1288 | int mode_bits; | |
1289 | SCM answer; | |
840ae05d | 1290 | scm_port * pt; |
0f2d19dd JB |
1291 | |
1292 | SCM_NEWCELL (answer); | |
1293 | SCM_DEFER_INTS; | |
1294 | mode_bits = scm_mode_bits (mode_str); | |
1295 | pt = scm_add_to_port_table (answer); | |
0f2d19dd | 1296 | SCM_SETPTAB_ENTRY (answer, pt); |
ee149d03 JB |
1297 | SCM_SETSTREAM (answer, 0); |
1298 | SCM_SETCAR (answer, scm_tc16_void_port | mode_bits); | |
0f2d19dd JB |
1299 | SCM_ALLOW_INTS; |
1300 | return answer; | |
1301 | } | |
1302 | ||
1303 | ||
1bbd0b84 GB |
1304 | GUILE_PROC (scm_sys_make_void_port, "%make-void-port", 1, 0, 0, |
1305 | (SCM mode), | |
4079f87e GB |
1306 | "Create and return a new void port. The @var{mode} argument describes |
1307 | the input/output modes for this port; for a description, see the | |
1308 | documentation for @code{open-file} in @ref{File Ports}.") | |
1bbd0b84 | 1309 | #define FUNC_NAME s_scm_sys_make_void_port |
0f2d19dd | 1310 | { |
1bbd0b84 | 1311 | SCM_VALIDATE_ROSTRING(1,mode); |
89958ad0 | 1312 | SCM_COERCE_SUBSTR (mode); |
0f2d19dd JB |
1313 | return scm_void_port (SCM_ROCHARS (mode)); |
1314 | } | |
1bbd0b84 | 1315 | #undef FUNC_NAME |
0f2d19dd | 1316 | |
0f2d19dd | 1317 | \f |
89545eba | 1318 | /* Initialization. */ |
1cc91f1b | 1319 | |
0f2d19dd JB |
1320 | void |
1321 | scm_init_ports () | |
0f2d19dd | 1322 | { |
840ae05d JB |
1323 | /* lseek() symbols. */ |
1324 | scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET)); | |
1325 | scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR)); | |
1326 | scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END)); | |
1327 | ||
affc96b5 | 1328 | scm_tc16_void_port = scm_make_port_type ("void", 0, write_void_port); |
0f2d19dd JB |
1329 | #include "ports.x" |
1330 | } |