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be54b15d | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001 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 | 41 | |
1bbd0b84 | 42 | |
0f2d19dd | 43 | \f |
d68fee48 JB |
44 | /* Headers. */ |
45 | ||
0f2d19dd | 46 | #include <stdio.h> |
e6e2e95a MD |
47 | #include <errno.h> |
48 | ||
a0599745 | 49 | #include "libguile/_scm.h" |
f0942910 | 50 | #include "libguile/eval.h" |
a0599745 MD |
51 | #include "libguile/objects.h" |
52 | #include "libguile/smob.h" | |
53 | #include "libguile/chars.h" | |
0f2d19dd | 54 | |
a0599745 MD |
55 | #include "libguile/keywords.h" |
56 | #include "libguile/root.h" | |
57 | #include "libguile/strings.h" | |
20e6290e | 58 | |
a0599745 MD |
59 | #include "libguile/validate.h" |
60 | #include "libguile/ports.h" | |
0f2d19dd | 61 | |
bd9e24b3 GH |
62 | #ifdef HAVE_STRING_H |
63 | #include <string.h> | |
64 | #endif | |
65 | ||
0f2d19dd | 66 | #ifdef HAVE_MALLOC_H |
95b88819 | 67 | #include <malloc.h> |
0f2d19dd JB |
68 | #endif |
69 | ||
ec65f5da MV |
70 | #ifdef HAVE_IO_H |
71 | #include <io.h> | |
72 | #endif | |
73 | ||
0f2d19dd JB |
74 | #ifdef HAVE_UNISTD_H |
75 | #include <unistd.h> | |
76 | #endif | |
77 | ||
95b88819 GH |
78 | #ifdef HAVE_SYS_IOCTL_H |
79 | #include <sys/ioctl.h> | |
80 | #endif | |
d68fee48 | 81 | |
82893676 MG |
82 | #ifdef __MINGW32__ |
83 | #include <fcntl.h> | |
84 | #define ftruncate(fd, size) chsize (fd, size) | |
85 | #endif | |
86 | ||
0f2d19dd | 87 | \f |
d68fee48 | 88 | /* The port kind table --- a dynamically resized array of port types. */ |
0f2d19dd JB |
89 | |
90 | ||
91 | /* scm_ptobs scm_numptob | |
92 | * implement a dynamicly resized array of ptob records. | |
93 | * Indexes into this table are used when generating type | |
94 | * tags for smobjects (if you know a tag you can get an index and conversely). | |
95 | */ | |
92c2555f | 96 | scm_t_ptob_descriptor *scm_ptobs; |
c014a02e | 97 | long scm_numptob; |
0f2d19dd | 98 | |
ee149d03 | 99 | /* GC marker for a port with stream of SCM type. */ |
0f2d19dd | 100 | SCM |
a284e297 | 101 | scm_markstream (SCM ptr) |
0f2d19dd JB |
102 | { |
103 | int openp; | |
f9a64404 | 104 | openp = SCM_CELL_WORD_0 (ptr) & SCM_OPN; |
0f2d19dd | 105 | if (openp) |
74a16888 | 106 | return SCM_PACK (SCM_STREAM (ptr)); |
0f2d19dd JB |
107 | else |
108 | return SCM_BOOL_F; | |
109 | } | |
110 | ||
f12733c9 | 111 | /* |
f12733c9 | 112 | * We choose to use an interface similar to the smob interface with |
affc96b5 | 113 | * fill_input and write as standard fields, passed to the port |
f12733c9 MD |
114 | * type constructor, and optional fields set by setters. |
115 | */ | |
116 | ||
70df8af6 | 117 | static void |
e81d98ec | 118 | flush_port_default (SCM port SCM_UNUSED) |
70df8af6 GH |
119 | { |
120 | } | |
121 | ||
122 | static void | |
e81d98ec | 123 | end_input_default (SCM port SCM_UNUSED, int offset SCM_UNUSED) |
70df8af6 GH |
124 | { |
125 | } | |
0f2d19dd | 126 | |
4c9419ac MV |
127 | static size_t |
128 | scm_port_free0 (SCM port) | |
129 | { | |
130 | return 0; | |
131 | } | |
132 | ||
92c2555f | 133 | scm_t_bits |
f12733c9 | 134 | scm_make_port_type (char *name, |
affc96b5 | 135 | int (*fill_input) (SCM port), |
8aa011a1 | 136 | void (*write) (SCM port, const void *data, size_t size)) |
0f2d19dd JB |
137 | { |
138 | char *tmp; | |
139 | if (255 <= scm_numptob) | |
140 | goto ptoberr; | |
f12733c9 MD |
141 | SCM_DEFER_INTS; |
142 | SCM_SYSCALL (tmp = (char *) realloc ((char *) scm_ptobs, | |
143 | (1 + scm_numptob) | |
92c2555f | 144 | * sizeof (scm_t_ptob_descriptor))); |
0f2d19dd JB |
145 | if (tmp) |
146 | { | |
92c2555f | 147 | scm_ptobs = (scm_t_ptob_descriptor *) tmp; |
affc96b5 | 148 | |
f12733c9 MD |
149 | scm_ptobs[scm_numptob].name = name; |
150 | scm_ptobs[scm_numptob].mark = 0; | |
4c9419ac | 151 | scm_ptobs[scm_numptob].free = scm_port_free0; |
f12733c9 MD |
152 | scm_ptobs[scm_numptob].print = scm_port_print; |
153 | scm_ptobs[scm_numptob].equalp = 0; | |
affc96b5 GH |
154 | scm_ptobs[scm_numptob].close = 0; |
155 | ||
156 | scm_ptobs[scm_numptob].write = write; | |
70df8af6 | 157 | scm_ptobs[scm_numptob].flush = flush_port_default; |
affc96b5 | 158 | |
70df8af6 | 159 | scm_ptobs[scm_numptob].end_input = end_input_default; |
affc96b5 GH |
160 | scm_ptobs[scm_numptob].fill_input = fill_input; |
161 | scm_ptobs[scm_numptob].input_waiting = 0; | |
162 | ||
f12733c9 | 163 | scm_ptobs[scm_numptob].seek = 0; |
affc96b5 GH |
164 | scm_ptobs[scm_numptob].truncate = 0; |
165 | ||
0f2d19dd JB |
166 | scm_numptob++; |
167 | } | |
f12733c9 | 168 | SCM_ALLOW_INTS; |
0f2d19dd | 169 | if (!tmp) |
2500356c DH |
170 | { |
171 | ptoberr: | |
172 | scm_memory_error ("scm_make_port_type"); | |
173 | } | |
f12733c9 MD |
174 | /* Make a class object if Goops is present */ |
175 | if (scm_port_class) | |
176 | scm_make_port_classes (scm_numptob - 1, SCM_PTOBNAME (scm_numptob - 1)); | |
0f2d19dd JB |
177 | return scm_tc7_port + (scm_numptob - 1) * 256; |
178 | } | |
179 | ||
f12733c9 | 180 | void |
6c747373 | 181 | scm_set_port_mark (long tc, SCM (*mark) (SCM)) |
f12733c9 MD |
182 | { |
183 | scm_ptobs[SCM_TC2PTOBNUM (tc)].mark = mark; | |
184 | } | |
185 | ||
186 | void | |
1be6b49c | 187 | scm_set_port_free (long tc, size_t (*free) (SCM)) |
f12733c9 MD |
188 | { |
189 | scm_ptobs[SCM_TC2PTOBNUM (tc)].free = free; | |
190 | } | |
191 | ||
192 | void | |
6c747373 | 193 | scm_set_port_print (long tc, int (*print) (SCM exp, SCM port, |
f12733c9 MD |
194 | scm_print_state *pstate)) |
195 | { | |
196 | scm_ptobs[SCM_TC2PTOBNUM (tc)].print = print; | |
197 | } | |
198 | ||
199 | void | |
6c747373 | 200 | scm_set_port_equalp (long tc, SCM (*equalp) (SCM, SCM)) |
f12733c9 MD |
201 | { |
202 | scm_ptobs[SCM_TC2PTOBNUM (tc)].equalp = equalp; | |
203 | } | |
204 | ||
31703ab8 | 205 | void |
affc96b5 | 206 | scm_set_port_flush (long tc, void (*flush) (SCM port)) |
31703ab8 | 207 | { |
affc96b5 | 208 | scm_ptobs[SCM_TC2PTOBNUM (tc)].flush = flush; |
31703ab8 GH |
209 | } |
210 | ||
f12733c9 | 211 | void |
affc96b5 | 212 | scm_set_port_end_input (long tc, void (*end_input) (SCM port, int offset)) |
f12733c9 | 213 | { |
affc96b5 | 214 | scm_ptobs[SCM_TC2PTOBNUM (tc)].end_input = end_input; |
f12733c9 MD |
215 | } |
216 | ||
217 | void | |
6c747373 | 218 | scm_set_port_close (long tc, int (*close) (SCM)) |
f12733c9 | 219 | { |
affc96b5 | 220 | scm_ptobs[SCM_TC2PTOBNUM (tc)].close = close; |
f12733c9 MD |
221 | } |
222 | ||
223 | void | |
6c747373 | 224 | scm_set_port_seek (long tc, off_t (*seek) (SCM port, |
f12733c9 MD |
225 | off_t OFFSET, |
226 | int WHENCE)) | |
227 | { | |
228 | scm_ptobs[SCM_TC2PTOBNUM (tc)].seek = seek; | |
229 | } | |
230 | ||
231 | void | |
6c747373 | 232 | scm_set_port_truncate (long tc, void (*truncate) (SCM port, off_t length)) |
f12733c9 | 233 | { |
affc96b5 | 234 | scm_ptobs[SCM_TC2PTOBNUM (tc)].truncate = truncate; |
f12733c9 MD |
235 | } |
236 | ||
237 | void | |
affc96b5 | 238 | scm_set_port_input_waiting (long tc, int (*input_waiting) (SCM)) |
f12733c9 | 239 | { |
affc96b5 | 240 | scm_ptobs[SCM_TC2PTOBNUM (tc)].input_waiting = input_waiting; |
f12733c9 MD |
241 | } |
242 | ||
0f2d19dd | 243 | \f |
0f2d19dd | 244 | |
3b3b36dd | 245 | SCM_DEFINE (scm_char_ready_p, "char-ready?", 0, 1, 0, |
1e6808ea MG |
246 | (SCM port), |
247 | "Return @code{#t} if a character is ready on input @var{port}\n" | |
248 | "and return @code{#f} otherwise. If @code{char-ready?} returns\n" | |
249 | "@code{#t} then the next @code{read-char} operation on\n" | |
250 | "@var{port} is guaranteed not to hang. If @var{port} is a file\n" | |
251 | "port at end of file then @code{char-ready?} returns @code{#t}.\n" | |
252 | "@footnote{@code{char-ready?} exists to make it possible for a\n" | |
253 | "program to accept characters from interactive ports without\n" | |
254 | "getting stuck waiting for input. Any input editors associated\n" | |
255 | "with such ports must make sure that characters whose existence\n" | |
256 | "has been asserted by @code{char-ready?} cannot be rubbed out.\n" | |
257 | "If @code{char-ready?} were to return @code{#f} at end of file,\n" | |
258 | "a port at end of file would be indistinguishable from an\n" | |
259 | "interactive port that has no ready characters.}") | |
1bbd0b84 | 260 | #define FUNC_NAME s_scm_char_ready_p |
0f2d19dd | 261 | { |
92c2555f | 262 | scm_t_port *pt; |
6c951427 | 263 | |
0f2d19dd JB |
264 | if (SCM_UNBNDP (port)) |
265 | port = scm_cur_inp; | |
266 | else | |
34d19ef6 | 267 | SCM_VALIDATE_OPINPORT (1, port); |
d68fee48 | 268 | |
ae4c4016 JB |
269 | pt = SCM_PTAB_ENTRY (port); |
270 | ||
6c951427 GH |
271 | /* if the current read buffer is filled, or the |
272 | last pushed-back char has been read and the saved buffer is | |
273 | filled, result is true. */ | |
274 | if (pt->read_pos < pt->read_end | |
275 | || (pt->read_buf == pt->putback_buf | |
276 | && pt->saved_read_pos < pt->saved_read_end)) | |
0f2d19dd | 277 | return SCM_BOOL_T; |
ee149d03 JB |
278 | else |
279 | { | |
92c2555f | 280 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
ee149d03 | 281 | |
affc96b5 | 282 | if (ptob->input_waiting) |
1bbd0b84 | 283 | return SCM_BOOL(ptob->input_waiting (port)); |
ee149d03 | 284 | else |
6c951427 | 285 | return SCM_BOOL_T; |
ee149d03 | 286 | } |
0f2d19dd | 287 | } |
1bbd0b84 | 288 | #undef FUNC_NAME |
0f2d19dd | 289 | |
c2da2648 GH |
290 | /* move up to read_len chars from port's putback and/or read buffers |
291 | into memory starting at dest. returns the number of chars moved. */ | |
292 | size_t scm_take_from_input_buffers (SCM port, char *dest, size_t read_len) | |
293 | { | |
92c2555f | 294 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
c2da2648 GH |
295 | size_t chars_read = 0; |
296 | size_t from_buf = min (pt->read_end - pt->read_pos, read_len); | |
297 | ||
298 | if (from_buf > 0) | |
299 | { | |
300 | memcpy (dest, pt->read_pos, from_buf); | |
301 | pt->read_pos += from_buf; | |
302 | chars_read += from_buf; | |
303 | read_len -= from_buf; | |
304 | dest += from_buf; | |
305 | } | |
306 | ||
307 | /* if putback was active, try the real input buffer too. */ | |
308 | if (pt->read_buf == pt->putback_buf) | |
309 | { | |
310 | from_buf = min (pt->saved_read_end - pt->saved_read_pos, read_len); | |
311 | if (from_buf > 0) | |
312 | { | |
313 | memcpy (dest, pt->saved_read_pos, from_buf); | |
314 | pt->saved_read_pos += from_buf; | |
315 | chars_read += from_buf; | |
316 | } | |
317 | } | |
318 | return chars_read; | |
319 | } | |
320 | ||
6c951427 | 321 | /* Clear a port's read buffers, returning the contents. */ |
a1ec6916 | 322 | SCM_DEFINE (scm_drain_input, "drain-input", 1, 0, 0, |
1bbd0b84 | 323 | (SCM port), |
4a151b3d GH |
324 | "This procedure clears a port's input buffers, similar\n" |
325 | "to the way that force-output clears the output buffer. The\n" | |
326 | "contents of the buffers are returned as a single string, e.g.,\n" | |
327 | "\n" | |
328 | "@lisp\n" | |
329 | "(define p (open-input-file ...))\n" | |
330 | "(drain-input p) => empty string, nothing buffered yet.\n" | |
331 | "(unread-char (read-char p) p)\n" | |
332 | "(drain-input p) => initial chars from p, up to the buffer size.\n" | |
333 | "@end lisp\n\n" | |
334 | "Draining the buffers may be useful for cleanly finishing\n" | |
335 | "buffered I/O so that the file descriptor can be used directly\n" | |
336 | "for further input.") | |
1bbd0b84 | 337 | #define FUNC_NAME s_scm_drain_input |
ee149d03 | 338 | { |
840ae05d | 339 | SCM result; |
92c2555f | 340 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
c014a02e | 341 | long count; |
ee149d03 | 342 | |
34d19ef6 | 343 | SCM_VALIDATE_OPINPORT (1, port); |
840ae05d | 344 | |
6c951427 GH |
345 | count = pt->read_end - pt->read_pos; |
346 | if (pt->read_buf == pt->putback_buf) | |
347 | count += pt->saved_read_end - pt->saved_read_pos; | |
840ae05d | 348 | |
be54b15d | 349 | result = scm_allocate_string (count); |
c2da2648 | 350 | scm_take_from_input_buffers (port, SCM_STRING_CHARS (result), count); |
6c951427 | 351 | |
840ae05d | 352 | return result; |
ee149d03 | 353 | } |
1bbd0b84 | 354 | #undef FUNC_NAME |
0f2d19dd JB |
355 | |
356 | \f | |
d68fee48 | 357 | /* Standard ports --- current input, output, error, and more(!). */ |
0f2d19dd | 358 | |
3b3b36dd | 359 | SCM_DEFINE (scm_current_input_port, "current-input-port", 0, 0, 0, |
e1546b65 MG |
360 | (), |
361 | "Return the current input port. This is the default port used\n" | |
362 | "by many input procedures. Initially, @code{current-input-port}\n" | |
363 | "returns the @dfn{standard input} in Unix and C terminology.") | |
1bbd0b84 | 364 | #define FUNC_NAME s_scm_current_input_port |
0f2d19dd JB |
365 | { |
366 | return scm_cur_inp; | |
367 | } | |
1bbd0b84 | 368 | #undef FUNC_NAME |
0f2d19dd | 369 | |
3b3b36dd | 370 | SCM_DEFINE (scm_current_output_port, "current-output-port", 0, 0, 0, |
e1546b65 MG |
371 | (), |
372 | "Return the current output port. This is the default port used\n" | |
9401323e | 373 | "by many output procedures. Initially,\n" |
e1546b65 MG |
374 | "@code{current-output-port} returns the @dfn{standard output} in\n" |
375 | "Unix and C terminology.") | |
1bbd0b84 | 376 | #define FUNC_NAME s_scm_current_output_port |
0f2d19dd JB |
377 | { |
378 | return scm_cur_outp; | |
379 | } | |
1bbd0b84 | 380 | #undef FUNC_NAME |
0f2d19dd | 381 | |
3b3b36dd | 382 | SCM_DEFINE (scm_current_error_port, "current-error-port", 0, 0, 0, |
1bbd0b84 | 383 | (), |
b380b885 MD |
384 | "Return the port to which errors and warnings should be sent (the\n" |
385 | "@dfn{standard error} in Unix and C terminology).") | |
1bbd0b84 | 386 | #define FUNC_NAME s_scm_current_error_port |
0f2d19dd JB |
387 | { |
388 | return scm_cur_errp; | |
389 | } | |
1bbd0b84 | 390 | #undef FUNC_NAME |
0f2d19dd | 391 | |
3b3b36dd | 392 | SCM_DEFINE (scm_current_load_port, "current-load-port", 0, 0, 0, |
e1546b65 | 393 | (), |
b450f070 | 394 | "Return the current-load-port.\n" |
e1546b65 | 395 | "The load port is used internally by @code{primitive-load}.") |
1bbd0b84 | 396 | #define FUNC_NAME s_scm_current_load_port |
31614d8e MD |
397 | { |
398 | return scm_cur_loadp; | |
399 | } | |
1bbd0b84 | 400 | #undef FUNC_NAME |
31614d8e | 401 | |
3b3b36dd | 402 | SCM_DEFINE (scm_set_current_input_port, "set-current-input-port", 1, 0, 0, |
1bbd0b84 | 403 | (SCM port), |
8f85c0c6 NJ |
404 | "@deffnx {Scheme Procedure} set-current-output-port port\n" |
405 | "@deffnx {Scheme Procedure} set-current-error-port port\n" | |
b380b885 MD |
406 | "Change the ports returned by @code{current-input-port},\n" |
407 | "@code{current-output-port} and @code{current-error-port}, respectively,\n" | |
408 | "so that they use the supplied @var{port} for input or output.") | |
1bbd0b84 | 409 | #define FUNC_NAME s_scm_set_current_input_port |
0f2d19dd JB |
410 | { |
411 | SCM oinp = scm_cur_inp; | |
34d19ef6 | 412 | SCM_VALIDATE_OPINPORT (1, port); |
0f2d19dd JB |
413 | scm_cur_inp = port; |
414 | return oinp; | |
415 | } | |
1bbd0b84 | 416 | #undef FUNC_NAME |
0f2d19dd JB |
417 | |
418 | ||
3b3b36dd | 419 | SCM_DEFINE (scm_set_current_output_port, "set-current-output-port", 1, 0, 0, |
e1546b65 MG |
420 | (SCM port), |
421 | "Set the current default output port to @var{port}.") | |
1bbd0b84 | 422 | #define FUNC_NAME s_scm_set_current_output_port |
0f2d19dd JB |
423 | { |
424 | SCM ooutp = scm_cur_outp; | |
78446828 | 425 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 426 | SCM_VALIDATE_OPOUTPORT (1, port); |
0f2d19dd JB |
427 | scm_cur_outp = port; |
428 | return ooutp; | |
429 | } | |
1bbd0b84 | 430 | #undef FUNC_NAME |
0f2d19dd JB |
431 | |
432 | ||
3b3b36dd | 433 | SCM_DEFINE (scm_set_current_error_port, "set-current-error-port", 1, 0, 0, |
e1546b65 MG |
434 | (SCM port), |
435 | "Set the current default error port to @var{port}.") | |
1bbd0b84 | 436 | #define FUNC_NAME s_scm_set_current_error_port |
0f2d19dd JB |
437 | { |
438 | SCM oerrp = scm_cur_errp; | |
78446828 | 439 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 440 | SCM_VALIDATE_OPOUTPORT (1, port); |
0f2d19dd JB |
441 | scm_cur_errp = port; |
442 | return oerrp; | |
443 | } | |
1bbd0b84 | 444 | #undef FUNC_NAME |
0f2d19dd JB |
445 | |
446 | \f | |
840ae05d | 447 | /* The port table --- an array of pointers to ports. */ |
0f2d19dd | 448 | |
67329a9e | 449 | scm_t_port **scm_i_port_table; |
0f2d19dd | 450 | |
67329a9e HWN |
451 | long scm_i_port_table_size = 0; /* Number of ports in scm_i_port_table. */ |
452 | long scm_i_port_table_room = 20; /* Size of the array. */ | |
0f2d19dd | 453 | |
1cc91f1b | 454 | |
da220f27 HWN |
455 | SCM |
456 | scm_new_port_table_entry (scm_t_bits tag) | |
402788a9 | 457 | #define FUNC_NAME "scm_new_port_table_entry" |
0f2d19dd | 458 | { |
67329a9e | 459 | SCM z = scm_cons (SCM_EOL, SCM_EOL); |
39e8f371 | 460 | scm_t_port *entry = (scm_t_port *) scm_gc_calloc (sizeof (scm_t_port), "port"); |
67329a9e | 461 | if (scm_i_port_table_size == scm_i_port_table_room) |
0f2d19dd | 462 | { |
4c9419ac | 463 | /* initial malloc is in gc.c. this doesn't use scm_gc_malloc etc., |
c6c79933 | 464 | since it can never be freed during gc. */ |
67329a9e | 465 | void *newt = scm_realloc ((char *) scm_i_port_table, |
4c9419ac | 466 | (size_t) (sizeof (scm_t_port *) |
67329a9e HWN |
467 | * scm_i_port_table_room * 2)); |
468 | scm_i_port_table = (scm_t_port **) newt; | |
469 | scm_i_port_table_room *= 2; | |
0f2d19dd | 470 | } |
840ae05d | 471 | |
67329a9e | 472 | entry->entry = scm_i_port_table_size; |
5f16b897 | 473 | |
840ae05d | 474 | entry->file_name = SCM_BOOL_F; |
61e452ba | 475 | entry->rw_active = SCM_PORT_NEITHER; |
5f16b897 | 476 | |
67329a9e HWN |
477 | scm_i_port_table[scm_i_port_table_size] = entry; |
478 | scm_i_port_table_size++; | |
840ae05d | 479 | |
da220f27 HWN |
480 | entry->port = z; |
481 | SCM_SET_CELL_TYPE(z, tag); | |
482 | SCM_SETPTAB_ENTRY(z, entry); | |
483 | ||
484 | return z; | |
0f2d19dd | 485 | } |
c6c79933 | 486 | #undef FUNC_NAME |
0f2d19dd | 487 | |
67329a9e HWN |
488 | #if SCM_ENABLE_DEPRECATED==1 |
489 | SCM_API scm_t_port * | |
490 | scm_add_to_port_table (SCM port) | |
491 | { | |
492 | SCM z = scm_new_port_table_entry (scm_tc7_port); | |
493 | scm_t_port * pt = SCM_PTAB_ENTRY(z); | |
494 | ||
495 | pt->port = port; | |
496 | SCM_SETCAR(z, SCM_EOL); | |
497 | SCM_SETCDR(z, SCM_EOL); | |
498 | ||
499 | return pt; | |
500 | } | |
501 | #endif | |
502 | ||
503 | ||
6c951427 | 504 | /* Remove a port from the table and destroy it. */ |
0f2d19dd | 505 | void |
a284e297 | 506 | scm_remove_from_port_table (SCM port) |
db4b4ca6 | 507 | #define FUNC_NAME "scm_remove_from_port_table" |
0f2d19dd | 508 | { |
92c2555f | 509 | scm_t_port *p = SCM_PTAB_ENTRY (port); |
c014a02e | 510 | long i = p->entry; |
6c951427 | 511 | |
67329a9e | 512 | if (i >= scm_i_port_table_size) |
1afff620 | 513 | SCM_MISC_ERROR ("Port not in table: ~S", scm_list_1 (port)); |
6c951427 | 514 | if (p->putback_buf) |
4c9419ac MV |
515 | scm_gc_free (p->putback_buf, p->putback_buf_size, "putback buffer"); |
516 | scm_gc_free (p, sizeof (scm_t_port), "port"); | |
ee1e7e13 MD |
517 | /* Since we have just freed slot i we can shrink the table by moving |
518 | the last entry to that slot... */ | |
67329a9e | 519 | if (i < scm_i_port_table_size - 1) |
0f2d19dd | 520 | { |
67329a9e HWN |
521 | scm_i_port_table[i] = scm_i_port_table[scm_i_port_table_size - 1]; |
522 | scm_i_port_table[i]->entry = i; | |
0f2d19dd | 523 | } |
0f2d19dd | 524 | SCM_SETPTAB_ENTRY (port, 0); |
67329a9e | 525 | scm_i_port_table_size--; |
0f2d19dd | 526 | } |
db4b4ca6 DH |
527 | #undef FUNC_NAME |
528 | ||
0f2d19dd | 529 | |
fea6b4ea | 530 | #ifdef GUILE_DEBUG |
b450f070 | 531 | /* Functions for debugging. */ |
1cc91f1b | 532 | |
3b3b36dd | 533 | SCM_DEFINE (scm_pt_size, "pt-size", 0, 0, 0, |
b450f070 | 534 | (), |
1e6808ea | 535 | "Return the number of ports in the port table. @code{pt-size}\n" |
5352393c | 536 | "is only included in @code{--enable-guile-debug} builds.") |
1bbd0b84 | 537 | #define FUNC_NAME s_scm_pt_size |
0f2d19dd | 538 | { |
67329a9e | 539 | return SCM_MAKINUM (scm_i_port_table_size); |
0f2d19dd | 540 | } |
1bbd0b84 | 541 | #undef FUNC_NAME |
0f2d19dd | 542 | |
3b3b36dd | 543 | SCM_DEFINE (scm_pt_member, "pt-member", 1, 0, 0, |
b450f070 | 544 | (SCM index), |
1e6808ea | 545 | "Return the port at @var{index} in the port table.\n" |
5352393c MG |
546 | "@code{pt-member} is only included in\n" |
547 | "@code{--enable-guile-debug} builds.") | |
1bbd0b84 | 548 | #define FUNC_NAME s_scm_pt_member |
0f2d19dd | 549 | { |
c014a02e | 550 | long i; |
34d19ef6 | 551 | SCM_VALIDATE_INUM_COPY (1, index, i); |
67329a9e | 552 | if (i < 0 || i >= scm_i_port_table_size) |
0f2d19dd JB |
553 | return SCM_BOOL_F; |
554 | else | |
67329a9e | 555 | return scm_i_port_table[i]->port; |
0f2d19dd | 556 | } |
1bbd0b84 | 557 | #undef FUNC_NAME |
0f2d19dd JB |
558 | #endif |
559 | ||
70df8af6 | 560 | void |
92c2555f | 561 | scm_port_non_buffer (scm_t_port *pt) |
70df8af6 GH |
562 | { |
563 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; | |
564 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
565 | pt->read_buf_size = pt->write_buf_size = 1; | |
566 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
567 | } | |
0f2d19dd | 568 | |
d68fee48 JB |
569 | \f |
570 | /* Revealed counts --- an oddity inherited from SCSH. */ | |
571 | ||
8b13c6b3 GH |
572 | /* Find a port in the table and return its revealed count. |
573 | Also used by the garbage collector. | |
0f2d19dd | 574 | */ |
1cc91f1b | 575 | |
0f2d19dd | 576 | int |
a284e297 | 577 | scm_revealed_count (SCM port) |
0f2d19dd JB |
578 | { |
579 | return SCM_REVEALED(port); | |
580 | } | |
581 | ||
582 | ||
583 | ||
584 | /* Return the revealed count for a port. */ | |
585 | ||
3b3b36dd | 586 | SCM_DEFINE (scm_port_revealed, "port-revealed", 1, 0, 0, |
1bbd0b84 | 587 | (SCM port), |
1e6808ea | 588 | "Return the revealed count for @var{port}.") |
1bbd0b84 | 589 | #define FUNC_NAME s_scm_port_revealed |
0f2d19dd | 590 | { |
78446828 | 591 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 592 | SCM_VALIDATE_OPENPORT (1, port); |
8b13c6b3 | 593 | return SCM_MAKINUM (scm_revealed_count (port)); |
0f2d19dd | 594 | } |
1bbd0b84 | 595 | #undef FUNC_NAME |
0f2d19dd JB |
596 | |
597 | /* Set the revealed count for a port. */ | |
3b3b36dd | 598 | SCM_DEFINE (scm_set_port_revealed_x, "set-port-revealed!", 2, 0, 0, |
1bbd0b84 | 599 | (SCM port, SCM rcount), |
b450f070 | 600 | "Sets the revealed count for a port to a given value.\n" |
b380b885 | 601 | "The return value is unspecified.") |
1bbd0b84 | 602 | #define FUNC_NAME s_scm_set_port_revealed_x |
0f2d19dd | 603 | { |
78446828 | 604 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 HWN |
605 | SCM_VALIDATE_OPENPORT (1, port); |
606 | SCM_VALIDATE_INUM (2, rcount); | |
0f2d19dd | 607 | SCM_REVEALED (port) = SCM_INUM (rcount); |
8b13c6b3 | 608 | return SCM_UNSPECIFIED; |
0f2d19dd | 609 | } |
1bbd0b84 | 610 | #undef FUNC_NAME |
0f2d19dd | 611 | |
d68fee48 JB |
612 | |
613 | \f | |
614 | /* Retrieving a port's mode. */ | |
615 | ||
eadd48de GH |
616 | /* Return the flags that characterize a port based on the mode |
617 | * string used to open a file for that port. | |
618 | * | |
619 | * See PORT FLAGS in scm.h | |
620 | */ | |
621 | ||
622 | long | |
a284e297 | 623 | scm_mode_bits (char *modes) |
eadd48de GH |
624 | { |
625 | return (SCM_OPN | |
626 | | (strchr (modes, 'r') || strchr (modes, '+') ? SCM_RDNG : 0) | |
627 | | ( strchr (modes, 'w') | |
628 | || strchr (modes, 'a') | |
629 | || strchr (modes, '+') ? SCM_WRTNG : 0) | |
ee149d03 JB |
630 | | (strchr (modes, '0') ? SCM_BUF0 : 0) |
631 | | (strchr (modes, 'l') ? SCM_BUFLINE : 0)); | |
eadd48de GH |
632 | } |
633 | ||
634 | ||
635 | /* Return the mode flags from an open port. | |
636 | * Some modes such as "append" are only used when opening | |
637 | * a file and are not returned here. */ | |
638 | ||
3b3b36dd | 639 | SCM_DEFINE (scm_port_mode, "port-mode", 1, 0, 0, |
1bbd0b84 | 640 | (SCM port), |
1e6808ea MG |
641 | "Return the port modes associated with the open port @var{port}.\n" |
642 | "These will not necessarily be identical to the modes used when\n" | |
643 | "the port was opened, since modes such as \"append\" which are\n" | |
644 | "used only during port creation are not retained.") | |
1bbd0b84 | 645 | #define FUNC_NAME s_scm_port_mode |
eadd48de | 646 | { |
26a3038d | 647 | char modes[4]; |
eadd48de | 648 | modes[0] = '\0'; |
78446828 MV |
649 | |
650 | port = SCM_COERCE_OUTPORT (port); | |
34d19ef6 | 651 | SCM_VALIDATE_OPPORT (1, port); |
f9a64404 DH |
652 | if (SCM_CELL_WORD_0 (port) & SCM_RDNG) { |
653 | if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) | |
eadd48de GH |
654 | strcpy (modes, "r+"); |
655 | else | |
656 | strcpy (modes, "r"); | |
657 | } | |
f9a64404 | 658 | else if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) |
eadd48de | 659 | strcpy (modes, "w"); |
f9a64404 | 660 | if (SCM_CELL_WORD_0 (port) & SCM_BUF0) |
eadd48de | 661 | strcat (modes, "0"); |
36284627 | 662 | return scm_mem2string (modes, strlen (modes)); |
eadd48de | 663 | } |
1bbd0b84 | 664 | #undef FUNC_NAME |
eadd48de GH |
665 | |
666 | ||
d68fee48 JB |
667 | \f |
668 | /* Closing ports. */ | |
669 | ||
0f2d19dd JB |
670 | /* scm_close_port |
671 | * Call the close operation on a port object. | |
eadd48de | 672 | * see also scm_close. |
0f2d19dd | 673 | */ |
3b3b36dd | 674 | SCM_DEFINE (scm_close_port, "close-port", 1, 0, 0, |
1bbd0b84 | 675 | (SCM port), |
1e6808ea MG |
676 | "Close the specified port object. Return @code{#t} if it\n" |
677 | "successfully closes a port or @code{#f} if it was already\n" | |
678 | "closed. An exception may be raised if an error occurs, for\n" | |
679 | "example when flushing buffered output. See also @ref{Ports and\n" | |
680 | "File Descriptors, close}, for a procedure which can close file\n" | |
681 | "descriptors.") | |
1bbd0b84 | 682 | #define FUNC_NAME s_scm_close_port |
0f2d19dd | 683 | { |
1be6b49c | 684 | size_t i; |
eadd48de GH |
685 | int rv; |
686 | ||
78446828 MV |
687 | port = SCM_COERCE_OUTPORT (port); |
688 | ||
7a754ca6 | 689 | SCM_VALIDATE_PORT (1, port); |
0f2d19dd | 690 | if (SCM_CLOSEDP (port)) |
eadd48de | 691 | return SCM_BOOL_F; |
0f2d19dd | 692 | i = SCM_PTOBNUM (port); |
affc96b5 GH |
693 | if (scm_ptobs[i].close) |
694 | rv = (scm_ptobs[i].close) (port); | |
eadd48de GH |
695 | else |
696 | rv = 0; | |
0f2d19dd | 697 | scm_remove_from_port_table (port); |
22a52da1 | 698 | SCM_CLR_PORT_OPEN_FLAG (port); |
36284627 | 699 | return SCM_BOOL (rv >= 0); |
7a754ca6 MD |
700 | } |
701 | #undef FUNC_NAME | |
702 | ||
703 | SCM_DEFINE (scm_close_input_port, "close-input-port", 1, 0, 0, | |
704 | (SCM port), | |
705 | "Close the specified input port object. The routine has no effect if\n" | |
706 | "the file has already been closed. An exception may be raised if an\n" | |
707 | "error occurs. The value returned is unspecified.\n\n" | |
708 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
709 | "which can close file descriptors.") | |
710 | #define FUNC_NAME s_scm_close_input_port | |
711 | { | |
712 | SCM_VALIDATE_INPUT_PORT (1, port); | |
713 | scm_close_port (port); | |
714 | return SCM_UNSPECIFIED; | |
715 | } | |
716 | #undef FUNC_NAME | |
717 | ||
718 | SCM_DEFINE (scm_close_output_port, "close-output-port", 1, 0, 0, | |
719 | (SCM port), | |
720 | "Close the specified output port object. The routine has no effect if\n" | |
721 | "the file has already been closed. An exception may be raised if an\n" | |
722 | "error occurs. The value returned is unspecified.\n\n" | |
723 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
724 | "which can close file descriptors.") | |
725 | #define FUNC_NAME s_scm_close_output_port | |
726 | { | |
727 | port = SCM_COERCE_OUTPORT (port); | |
728 | SCM_VALIDATE_OUTPUT_PORT (1, port); | |
729 | scm_close_port (port); | |
730 | return SCM_UNSPECIFIED; | |
0f2d19dd | 731 | } |
1bbd0b84 | 732 | #undef FUNC_NAME |
0f2d19dd | 733 | |
c2ca4493 GH |
734 | SCM_DEFINE (scm_port_for_each, "port-for-each", 1, 0, 0, |
735 | (SCM proc), | |
736 | "Apply @var{proc} to each port in the Guile port table\n" | |
2f1bbcfd MV |
737 | "in turn. The return value is unspecified. More specifically,\n" |
738 | "@var{proc} is applied exactly once to every port that exists\n" | |
739 | "in the system at the time @var{port-for-each} is invoked.\n" | |
740 | "Changes to the port table while @var{port-for-each} is running\n" | |
9401323e | 741 | "have no effect as far as @var{port-for-each} is concerned.") |
c2ca4493 GH |
742 | #define FUNC_NAME s_scm_port_for_each |
743 | { | |
c014a02e | 744 | long i; |
fdfe6305 MV |
745 | SCM ports; |
746 | ||
c2ca4493 GH |
747 | SCM_VALIDATE_PROC (1, proc); |
748 | ||
749 | /* when pre-emptive multithreading is supported, access to the port | |
750 | table will need to be controlled by a mutex. */ | |
fdfe6305 MV |
751 | |
752 | /* Even without pre-emptive multithreading, running arbitrary code | |
753 | while scanning the port table is unsafe because the port table | |
754 | can change arbitrarily (from a GC, for example). So we build a | |
755 | list in advance while blocking the GC. -mvo */ | |
756 | ||
c2ca4493 | 757 | SCM_DEFER_INTS; |
fdfe6305 MV |
758 | scm_block_gc++; |
759 | ports = SCM_EOL; | |
67329a9e HWN |
760 | for (i = 0; i < scm_i_port_table_size; i++) |
761 | ports = scm_cons (scm_i_port_table[i]->port, ports); | |
fdfe6305 MV |
762 | scm_block_gc--; |
763 | SCM_ALLOW_INTS; | |
764 | ||
765 | while (ports != SCM_EOL) | |
c2ca4493 | 766 | { |
fdc28395 | 767 | scm_call_1 (proc, SCM_CAR (ports)); |
fdfe6305 | 768 | ports = SCM_CDR (ports); |
c2ca4493 | 769 | } |
fdfe6305 | 770 | |
c2ca4493 GH |
771 | return SCM_UNSPECIFIED; |
772 | } | |
773 | #undef FUNC_NAME | |
774 | ||
d68fee48 JB |
775 | \f |
776 | /* Utter miscellany. Gosh, we should clean this up some time. */ | |
777 | ||
3b3b36dd | 778 | SCM_DEFINE (scm_input_port_p, "input-port?", 1, 0, 0, |
1bbd0b84 | 779 | (SCM x), |
1e6808ea MG |
780 | "Return @code{#t} if @var{x} is an input port, otherwise return\n" |
781 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
782 | "@code{port?}.") | |
1bbd0b84 | 783 | #define FUNC_NAME s_scm_input_port_p |
0f2d19dd | 784 | { |
36284627 | 785 | return SCM_BOOL (SCM_INPUT_PORT_P (x)); |
0f2d19dd | 786 | } |
1bbd0b84 | 787 | #undef FUNC_NAME |
0f2d19dd | 788 | |
3b3b36dd | 789 | SCM_DEFINE (scm_output_port_p, "output-port?", 1, 0, 0, |
1bbd0b84 | 790 | (SCM x), |
1e6808ea MG |
791 | "Return @code{#t} if @var{x} is an output port, otherwise return\n" |
792 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
793 | "@code{port?}.") | |
1bbd0b84 | 794 | #define FUNC_NAME s_scm_output_port_p |
0f2d19dd | 795 | { |
82893676 | 796 | x = SCM_COERCE_OUTPORT (x); |
36284627 | 797 | return SCM_BOOL (SCM_OUTPUT_PORT_P (x)); |
0f2d19dd | 798 | } |
1bbd0b84 | 799 | #undef FUNC_NAME |
0f2d19dd | 800 | |
eb5c0a2a GH |
801 | SCM_DEFINE (scm_port_p, "port?", 1, 0, 0, |
802 | (SCM x), | |
1e6808ea | 803 | "Return a boolean indicating whether @var{x} is a port.\n" |
5352393c MG |
804 | "Equivalent to @code{(or (input-port? @var{x}) (output-port?\n" |
805 | "@var{x}))}.") | |
eb5c0a2a GH |
806 | #define FUNC_NAME s_scm_port_p |
807 | { | |
808 | return SCM_BOOL (SCM_PORTP (x)); | |
809 | } | |
810 | #undef FUNC_NAME | |
811 | ||
3b3b36dd | 812 | SCM_DEFINE (scm_port_closed_p, "port-closed?", 1, 0, 0, |
1bbd0b84 | 813 | (SCM port), |
1e6808ea MG |
814 | "Return @code{#t} if @var{port} is closed or @code{#f} if it is\n" |
815 | "open.") | |
1bbd0b84 | 816 | #define FUNC_NAME s_scm_port_closed_p |
60d0643d | 817 | { |
34d19ef6 | 818 | SCM_VALIDATE_PORT (1, port); |
36284627 | 819 | return SCM_BOOL (!SCM_OPPORTP (port)); |
60d0643d | 820 | } |
1bbd0b84 | 821 | #undef FUNC_NAME |
0f2d19dd | 822 | |
3b3b36dd | 823 | SCM_DEFINE (scm_eof_object_p, "eof-object?", 1, 0, 0, |
1bbd0b84 | 824 | (SCM x), |
1e6808ea MG |
825 | "Return @code{#t} if @var{x} is an end-of-file object; otherwise\n" |
826 | "return @code{#f}.") | |
1bbd0b84 | 827 | #define FUNC_NAME s_scm_eof_object_p |
0f2d19dd | 828 | { |
1bbd0b84 | 829 | return SCM_BOOL(SCM_EOF_OBJECT_P (x)); |
0f2d19dd | 830 | } |
1bbd0b84 | 831 | #undef FUNC_NAME |
0f2d19dd | 832 | |
3b3b36dd | 833 | SCM_DEFINE (scm_force_output, "force-output", 0, 1, 0, |
1bbd0b84 | 834 | (SCM port), |
b380b885 | 835 | "Flush the specified output port, or the current output port if @var{port}\n" |
9401323e | 836 | "is omitted. The current output buffer contents are passed to the\n" |
b380b885 MD |
837 | "underlying port implementation (e.g., in the case of fports, the\n" |
838 | "data will be written to the file and the output buffer will be cleared.)\n" | |
839 | "It has no effect on an unbuffered port.\n\n" | |
840 | "The return value is unspecified.") | |
1bbd0b84 | 841 | #define FUNC_NAME s_scm_force_output |
0f2d19dd JB |
842 | { |
843 | if (SCM_UNBNDP (port)) | |
3e877d15 | 844 | port = scm_cur_outp; |
0f2d19dd | 845 | else |
78446828 MV |
846 | { |
847 | port = SCM_COERCE_OUTPORT (port); | |
34d19ef6 | 848 | SCM_VALIDATE_OPOUTPORT (1, port); |
78446828 | 849 | } |
affc96b5 | 850 | scm_flush (port); |
ee149d03 | 851 | return SCM_UNSPECIFIED; |
0f2d19dd | 852 | } |
1bbd0b84 | 853 | #undef FUNC_NAME |
0f2d19dd | 854 | |
a1ec6916 | 855 | SCM_DEFINE (scm_flush_all_ports, "flush-all-ports", 0, 0, 0, |
1bbd0b84 | 856 | (), |
b380b885 MD |
857 | "Equivalent to calling @code{force-output} on\n" |
858 | "all open output ports. The return value is unspecified.") | |
1bbd0b84 | 859 | #define FUNC_NAME s_scm_flush_all_ports |
89ea5b7c | 860 | { |
1be6b49c | 861 | size_t i; |
89ea5b7c | 862 | |
67329a9e | 863 | for (i = 0; i < scm_i_port_table_size; i++) |
89ea5b7c | 864 | { |
67329a9e HWN |
865 | if (SCM_OPOUTPORTP (scm_i_port_table[i]->port)) |
866 | scm_flush (scm_i_port_table[i]->port); | |
89ea5b7c GH |
867 | } |
868 | return SCM_UNSPECIFIED; | |
869 | } | |
1bbd0b84 | 870 | #undef FUNC_NAME |
0f2d19dd | 871 | |
3b3b36dd | 872 | SCM_DEFINE (scm_read_char, "read-char", 0, 1, 0, |
1bbd0b84 | 873 | (SCM port), |
1e6808ea MG |
874 | "Return the next character available from @var{port}, updating\n" |
875 | "@var{port} to point to the following character. If no more\n" | |
876 | "characters are available, the end-of-file object is returned.") | |
1bbd0b84 | 877 | #define FUNC_NAME s_scm_read_char |
0f2d19dd JB |
878 | { |
879 | int c; | |
880 | if (SCM_UNBNDP (port)) | |
334341aa | 881 | port = scm_cur_inp; |
34d19ef6 | 882 | SCM_VALIDATE_OPINPORT (1, port); |
b7f3516f | 883 | c = scm_getc (port); |
0f2d19dd JB |
884 | if (EOF == c) |
885 | return SCM_EOF_VAL; | |
7866a09b | 886 | return SCM_MAKE_CHAR (c); |
0f2d19dd | 887 | } |
1bbd0b84 | 888 | #undef FUNC_NAME |
0f2d19dd | 889 | |
5c070ca7 | 890 | /* this should only be called when the read buffer is empty. it |
affc96b5 | 891 | tries to refill the read buffer. it returns the first char from |
5c070ca7 | 892 | the port, which is either EOF or *(pt->read_pos). */ |
6c951427 | 893 | int |
affc96b5 | 894 | scm_fill_input (SCM port) |
6c951427 | 895 | { |
92c2555f | 896 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e | 897 | |
6c951427 GH |
898 | if (pt->read_buf == pt->putback_buf) |
899 | { | |
900 | /* finished reading put-back chars. */ | |
901 | pt->read_buf = pt->saved_read_buf; | |
902 | pt->read_pos = pt->saved_read_pos; | |
903 | pt->read_end = pt->saved_read_end; | |
904 | pt->read_buf_size = pt->saved_read_buf_size; | |
905 | if (pt->read_pos < pt->read_end) | |
5c070ca7 | 906 | return *(pt->read_pos); |
6c951427 | 907 | } |
affc96b5 | 908 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
6c951427 GH |
909 | } |
910 | ||
ee149d03 | 911 | int |
a284e297 | 912 | scm_getc (SCM port) |
0f2d19dd JB |
913 | { |
914 | int c; | |
92c2555f | 915 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 | 916 | |
840ae05d JB |
917 | if (pt->rw_active == SCM_PORT_WRITE) |
918 | { | |
affc96b5 GH |
919 | /* may be marginally faster than calling scm_flush. */ |
920 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
840ae05d | 921 | } |
6c951427 | 922 | |
5c070ca7 GH |
923 | if (pt->rw_random) |
924 | pt->rw_active = SCM_PORT_READ; | |
925 | ||
926 | if (pt->read_pos >= pt->read_end) | |
ee149d03 | 927 | { |
affc96b5 | 928 | if (scm_fill_input (port) == EOF) |
5c070ca7 | 929 | return EOF; |
ee149d03 JB |
930 | } |
931 | ||
5c070ca7 | 932 | c = *(pt->read_pos++); |
840ae05d | 933 | |
ee149d03 JB |
934 | if (c == '\n') |
935 | { | |
936 | SCM_INCLINE (port); | |
937 | } | |
938 | else if (c == '\t') | |
939 | { | |
940 | SCM_TABCOL (port); | |
941 | } | |
942 | else | |
943 | { | |
944 | SCM_INCCOL (port); | |
945 | } | |
946 | ||
947 | return c; | |
0f2d19dd JB |
948 | } |
949 | ||
ee149d03 | 950 | void |
a284e297 | 951 | scm_putc (char c, SCM port) |
ee149d03 | 952 | { |
265e6a4d | 953 | scm_lfwrite (&c, 1, port); |
ee149d03 | 954 | } |
3cb988bd | 955 | |
ee149d03 | 956 | void |
70d63753 | 957 | scm_puts (const char *s, SCM port) |
3cb988bd | 958 | { |
265e6a4d | 959 | scm_lfwrite (s, strlen (s), port); |
ee149d03 | 960 | } |
3cb988bd | 961 | |
6fe692e9 MD |
962 | /* scm_lfwrite |
963 | * | |
53802ea8 MV |
964 | * This function differs from scm_c_write; it updates port line and |
965 | * column. */ | |
6fe692e9 | 966 | |
ee149d03 | 967 | void |
1be6b49c | 968 | scm_lfwrite (const char *ptr, size_t size, SCM port) |
ee149d03 | 969 | { |
92c2555f MV |
970 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
971 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
3e2043c4 | 972 | |
840ae05d | 973 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 974 | scm_end_input (port); |
283a1a0e | 975 | |
31703ab8 | 976 | ptob->write (port, ptr, size); |
840ae05d | 977 | |
53802ea8 MV |
978 | for (; size; ptr++, size--) { |
979 | if (*ptr == '\n') { | |
980 | SCM_INCLINE(port); | |
981 | } | |
982 | else if (*ptr == '\t') { | |
983 | SCM_TABCOL(port); | |
984 | } | |
985 | else { | |
986 | SCM_INCCOL(port); | |
987 | } | |
988 | } | |
989 | ||
840ae05d JB |
990 | if (pt->rw_random) |
991 | pt->rw_active = SCM_PORT_WRITE; | |
ee149d03 | 992 | } |
3cb988bd | 993 | |
6fe692e9 MD |
994 | /* scm_c_read |
995 | * | |
996 | * Used by an application to read arbitrary number of bytes from an | |
997 | * SCM port. Same semantics as libc read, except that scm_c_read only | |
998 | * returns less than SIZE bytes if at end-of-file. | |
999 | * | |
1000 | * Warning: Doesn't update port line and column counts! */ | |
1001 | ||
1be6b49c ML |
1002 | size_t |
1003 | scm_c_read (SCM port, void *buffer, size_t size) | |
6fe692e9 | 1004 | { |
92c2555f | 1005 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1be6b49c | 1006 | size_t n_read = 0, n_available; |
6fe692e9 MD |
1007 | |
1008 | if (pt->rw_active == SCM_PORT_WRITE) | |
1009 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
1010 | ||
1011 | if (pt->rw_random) | |
1012 | pt->rw_active = SCM_PORT_READ; | |
1013 | ||
1014 | if (SCM_READ_BUFFER_EMPTY_P (pt)) | |
1015 | { | |
1016 | if (scm_fill_input (port) == EOF) | |
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | n_available = pt->read_end - pt->read_pos; | |
1021 | ||
1022 | while (n_available < size) | |
1023 | { | |
1024 | memcpy (buffer, pt->read_pos, n_available); | |
910d1e40 | 1025 | buffer = (char *) buffer + n_available; |
6fe692e9 MD |
1026 | pt->read_pos += n_available; |
1027 | n_read += n_available; | |
1028 | ||
1029 | if (SCM_READ_BUFFER_EMPTY_P (pt)) | |
1030 | { | |
1031 | if (scm_fill_input (port) == EOF) | |
1032 | return n_read; | |
1033 | } | |
1034 | ||
1035 | size -= n_available; | |
1036 | n_available = pt->read_end - pt->read_pos; | |
1037 | } | |
1038 | ||
1039 | memcpy (buffer, pt->read_pos, size); | |
1040 | pt->read_pos += size; | |
1041 | ||
1042 | return n_read + size; | |
1043 | } | |
1044 | ||
1045 | /* scm_c_write | |
1046 | * | |
1047 | * Used by an application to write arbitrary number of bytes to an SCM | |
1048 | * port. Similar semantics as libc write. However, unlike libc | |
1049 | * write, scm_c_write writes the requested number of bytes and has no | |
1050 | * return value. | |
1051 | * | |
1052 | * Warning: Doesn't update port line and column counts! | |
1053 | */ | |
1054 | ||
1055 | void | |
1be6b49c | 1056 | scm_c_write (SCM port, const void *ptr, size_t size) |
6fe692e9 | 1057 | { |
92c2555f MV |
1058 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1059 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
6fe692e9 MD |
1060 | |
1061 | if (pt->rw_active == SCM_PORT_READ) | |
1062 | scm_end_input (port); | |
1063 | ||
1064 | ptob->write (port, ptr, size); | |
1065 | ||
1066 | if (pt->rw_random) | |
1067 | pt->rw_active = SCM_PORT_WRITE; | |
1068 | } | |
3cb988bd | 1069 | |
ee149d03 | 1070 | void |
a284e297 | 1071 | scm_flush (SCM port) |
ee149d03 | 1072 | { |
c014a02e | 1073 | long i = SCM_PTOBNUM (port); |
affc96b5 | 1074 | (scm_ptobs[i].flush) (port); |
ee149d03 JB |
1075 | } |
1076 | ||
283a1a0e | 1077 | void |
a284e297 | 1078 | scm_end_input (SCM port) |
283a1a0e | 1079 | { |
c014a02e | 1080 | long offset; |
92c2555f | 1081 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e GH |
1082 | |
1083 | if (pt->read_buf == pt->putback_buf) | |
1084 | { | |
1085 | offset = pt->read_end - pt->read_pos; | |
1086 | pt->read_buf = pt->saved_read_buf; | |
1087 | pt->read_pos = pt->saved_read_pos; | |
1088 | pt->read_end = pt->saved_read_end; | |
1089 | pt->read_buf_size = pt->saved_read_buf_size; | |
1090 | } | |
1091 | else | |
1092 | offset = 0; | |
1093 | ||
affc96b5 | 1094 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
283a1a0e GH |
1095 | } |
1096 | ||
ee149d03 JB |
1097 | \f |
1098 | ||
1099 | ||
1100 | void | |
a284e297 | 1101 | scm_ungetc (int c, SCM port) |
c6c79933 | 1102 | #define FUNC_NAME "scm_ungetc" |
ee149d03 | 1103 | { |
92c2555f | 1104 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
840ae05d | 1105 | |
6c951427 GH |
1106 | if (pt->read_buf == pt->putback_buf) |
1107 | /* already using the put-back buffer. */ | |
1108 | { | |
1109 | /* enlarge putback_buf if necessary. */ | |
1110 | if (pt->read_end == pt->read_buf + pt->read_buf_size | |
1111 | && pt->read_buf == pt->read_pos) | |
1112 | { | |
1be6b49c | 1113 | size_t new_size = pt->read_buf_size * 2; |
c6c79933 | 1114 | unsigned char *tmp = (unsigned char *) |
4c9419ac MV |
1115 | scm_gc_realloc (pt->putback_buf, pt->read_buf_size, new_size, |
1116 | "putback buffer"); | |
6c951427 | 1117 | |
6c951427 GH |
1118 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; |
1119 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
1120 | pt->read_buf_size = pt->putback_buf_size = new_size; | |
1121 | } | |
1122 | ||
1123 | /* shift any existing bytes to buffer + 1. */ | |
1124 | if (pt->read_pos == pt->read_end) | |
1125 | pt->read_end = pt->read_buf + 1; | |
1126 | else if (pt->read_pos != pt->read_buf + 1) | |
1127 | { | |
1128 | int count = pt->read_end - pt->read_pos; | |
1129 | ||
1130 | memmove (pt->read_buf + 1, pt->read_pos, count); | |
1131 | pt->read_end = pt->read_buf + 1 + count; | |
1132 | } | |
1133 | ||
1134 | pt->read_pos = pt->read_buf; | |
1135 | } | |
1136 | else | |
1137 | /* switch to the put-back buffer. */ | |
1138 | { | |
1139 | if (pt->putback_buf == NULL) | |
1140 | { | |
c357d546 | 1141 | pt->putback_buf |
4c9419ac MV |
1142 | = (unsigned char *) scm_gc_malloc (SCM_INITIAL_PUTBACK_BUF_SIZE, |
1143 | "putback buffer"); | |
6c951427 GH |
1144 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; |
1145 | } | |
1146 | ||
1147 | pt->saved_read_buf = pt->read_buf; | |
1148 | pt->saved_read_pos = pt->read_pos; | |
1149 | pt->saved_read_end = pt->read_end; | |
1150 | pt->saved_read_buf_size = pt->read_buf_size; | |
1151 | ||
1152 | pt->read_pos = pt->read_buf = pt->putback_buf; | |
1153 | pt->read_end = pt->read_buf + 1; | |
1154 | pt->read_buf_size = pt->putback_buf_size; | |
1155 | } | |
1156 | ||
1157 | *pt->read_buf = c; | |
ee149d03 | 1158 | |
840ae05d JB |
1159 | if (pt->rw_random) |
1160 | pt->rw_active = SCM_PORT_READ; | |
1161 | ||
ee149d03 JB |
1162 | if (c == '\n') |
1163 | { | |
1164 | /* What should col be in this case? | |
1165 | * We'll leave it at -1. | |
1166 | */ | |
1167 | SCM_LINUM (port) -= 1; | |
1168 | } | |
1169 | else | |
1170 | SCM_COL(port) -= 1; | |
1171 | } | |
c6c79933 | 1172 | #undef FUNC_NAME |
ee149d03 JB |
1173 | |
1174 | ||
1175 | void | |
70d63753 | 1176 | scm_ungets (const char *s, int n, SCM port) |
ee149d03 JB |
1177 | { |
1178 | /* This is simple minded and inefficient, but unreading strings is | |
1179 | * probably not a common operation, and remember that line and | |
1180 | * column numbers have to be handled... | |
1181 | * | |
1182 | * Please feel free to write an optimized version! | |
1183 | */ | |
1184 | while (n--) | |
1185 | scm_ungetc (s[n], port); | |
1186 | } | |
1187 | ||
1188 | ||
3b3b36dd | 1189 | SCM_DEFINE (scm_peek_char, "peek-char", 0, 1, 0, |
1bbd0b84 | 1190 | (SCM port), |
1e6808ea MG |
1191 | "Return the next character available from @var{port},\n" |
1192 | "@emph{without} updating @var{port} to point to the following\n" | |
1193 | "character. If no more characters are available, the\n" | |
1194 | "end-of-file object is returned.@footnote{The value returned by\n" | |
1195 | "a call to @code{peek-char} is the same as the value that would\n" | |
1196 | "have been returned by a call to @code{read-char} on the same\n" | |
1197 | "port. The only difference is that the very next call to\n" | |
1198 | "@code{read-char} or @code{peek-char} on that @var{port} will\n" | |
1199 | "return the value returned by the preceding call to\n" | |
1200 | "@code{peek-char}. In particular, a call to @code{peek-char} on\n" | |
1201 | "an interactive port will hang waiting for input whenever a call\n" | |
1202 | "to @code{read-char} would have hung.}") | |
1bbd0b84 | 1203 | #define FUNC_NAME s_scm_peek_char |
ee149d03 JB |
1204 | { |
1205 | int c; | |
1206 | if (SCM_UNBNDP (port)) | |
1207 | port = scm_cur_inp; | |
1208 | else | |
34d19ef6 | 1209 | SCM_VALIDATE_OPINPORT (1, port); |
ee149d03 JB |
1210 | c = scm_getc (port); |
1211 | if (EOF == c) | |
1212 | return SCM_EOF_VAL; | |
1213 | scm_ungetc (c, port); | |
7866a09b | 1214 | return SCM_MAKE_CHAR (c); |
3cb988bd | 1215 | } |
1bbd0b84 | 1216 | #undef FUNC_NAME |
3cb988bd | 1217 | |
1be4270a | 1218 | SCM_DEFINE (scm_unread_char, "unread-char", 1, 1, 0, |
1bbd0b84 | 1219 | (SCM cobj, SCM port), |
b380b885 MD |
1220 | "Place @var{char} in @var{port} so that it will be read by the\n" |
1221 | "next read operation. If called multiple times, the unread characters\n" | |
1222 | "will be read again in last-in first-out order. If @var{port} is\n" | |
1223 | "not supplied, the current input port is used.") | |
1bbd0b84 | 1224 | #define FUNC_NAME s_scm_unread_char |
0f2d19dd JB |
1225 | { |
1226 | int c; | |
1227 | ||
34d19ef6 | 1228 | SCM_VALIDATE_CHAR (1, cobj); |
0f2d19dd JB |
1229 | if (SCM_UNBNDP (port)) |
1230 | port = scm_cur_inp; | |
1231 | else | |
34d19ef6 | 1232 | SCM_VALIDATE_OPINPORT (2, port); |
0f2d19dd | 1233 | |
7866a09b | 1234 | c = SCM_CHAR (cobj); |
0f2d19dd | 1235 | |
b7f3516f | 1236 | scm_ungetc (c, port); |
0f2d19dd JB |
1237 | return cobj; |
1238 | } | |
1bbd0b84 | 1239 | #undef FUNC_NAME |
0f2d19dd | 1240 | |
a1ec6916 | 1241 | SCM_DEFINE (scm_unread_string, "unread-string", 2, 0, 0, |
1bbd0b84 | 1242 | (SCM str, SCM port), |
b380b885 MD |
1243 | "Place the string @var{str} in @var{port} so that its characters will be\n" |
1244 | "read in subsequent read operations. If called multiple times, the\n" | |
1245 | "unread characters will be read again in last-in first-out order. If\n" | |
1246 | "@var{port} is not supplied, the current-input-port is used.") | |
1bbd0b84 | 1247 | #define FUNC_NAME s_scm_unread_string |
ee1e7e13 | 1248 | { |
34d19ef6 | 1249 | SCM_VALIDATE_STRING (1, str); |
ee1e7e13 MD |
1250 | if (SCM_UNBNDP (port)) |
1251 | port = scm_cur_inp; | |
1252 | else | |
34d19ef6 | 1253 | SCM_VALIDATE_OPINPORT (2, port); |
ee1e7e13 | 1254 | |
34f0f2b8 | 1255 | scm_ungets (SCM_STRING_CHARS (str), SCM_STRING_LENGTH (str), port); |
ee1e7e13 MD |
1256 | |
1257 | return str; | |
1258 | } | |
1bbd0b84 | 1259 | #undef FUNC_NAME |
ee1e7e13 | 1260 | |
a1ec6916 | 1261 | SCM_DEFINE (scm_seek, "seek", 3, 0, 0, |
1e6808ea MG |
1262 | (SCM fd_port, SCM offset, SCM whence), |
1263 | "Sets the current position of @var{fd/port} to the integer\n" | |
1264 | "@var{offset}, which is interpreted according to the value of\n" | |
1265 | "@var{whence}.\n" | |
1266 | "\n" | |
1267 | "One of the following variables should be supplied for\n" | |
1268 | "@var{whence}:\n" | |
b380b885 MD |
1269 | "@defvar SEEK_SET\n" |
1270 | "Seek from the beginning of the file.\n" | |
1271 | "@end defvar\n" | |
1272 | "@defvar SEEK_CUR\n" | |
1273 | "Seek from the current position.\n" | |
1274 | "@end defvar\n" | |
1275 | "@defvar SEEK_END\n" | |
1276 | "Seek from the end of the file.\n" | |
1e6808ea MG |
1277 | "@end defvar\n" |
1278 | "If @var{fd/port} is a file descriptor, the underlying system\n" | |
1279 | "call is @code{lseek}. @var{port} may be a string port.\n" | |
1280 | "\n" | |
1281 | "The value returned is the new position in the file. This means\n" | |
1282 | "that the current position of a port can be obtained using:\n" | |
1283 | "@lisp\n" | |
b380b885 | 1284 | "(seek port 0 SEEK_CUR)\n" |
1e6808ea | 1285 | "@end lisp") |
1bbd0b84 | 1286 | #define FUNC_NAME s_scm_seek |
840ae05d JB |
1287 | { |
1288 | off_t off; | |
1289 | off_t rv; | |
1290 | int how; | |
1291 | ||
1e6808ea | 1292 | fd_port = SCM_COERCE_OUTPORT (fd_port); |
840ae05d | 1293 | |
6fe692e9 MD |
1294 | off = SCM_NUM2LONG (2, offset); |
1295 | SCM_VALIDATE_INUM_COPY (3, whence, how); | |
840ae05d | 1296 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) |
1bbd0b84 | 1297 | SCM_OUT_OF_RANGE (3, whence); |
1e6808ea | 1298 | if (SCM_OPPORTP (fd_port)) |
840ae05d | 1299 | { |
92c2555f | 1300 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (fd_port); |
840ae05d JB |
1301 | |
1302 | if (!ptob->seek) | |
1bbd0b84 | 1303 | SCM_MISC_ERROR ("port is not seekable", |
1e6808ea | 1304 | scm_cons (fd_port, SCM_EOL)); |
840ae05d | 1305 | else |
1e6808ea | 1306 | rv = ptob->seek (fd_port, off, how); |
840ae05d JB |
1307 | } |
1308 | else /* file descriptor?. */ | |
1309 | { | |
34d19ef6 | 1310 | SCM_VALIDATE_INUM (1, fd_port); |
1e6808ea | 1311 | rv = lseek (SCM_INUM (fd_port), off, how); |
840ae05d | 1312 | if (rv == -1) |
1bbd0b84 | 1313 | SCM_SYSERROR; |
840ae05d JB |
1314 | } |
1315 | return scm_long2num (rv); | |
1316 | } | |
1bbd0b84 | 1317 | #undef FUNC_NAME |
840ae05d | 1318 | |
82893676 MG |
1319 | #ifdef __MINGW32__ |
1320 | /* Define this function since it is not supported under Windows. */ | |
1321 | static int truncate (char *file, int length) | |
1322 | { | |
1323 | int ret = -1, fdes; | |
1324 | if ((fdes = open (file, O_BINARY | O_WRONLY)) != -1) | |
1325 | { | |
1326 | ret = chsize (fdes, length); | |
1327 | close (fdes); | |
1328 | } | |
1329 | return ret; | |
1330 | } | |
1331 | #endif /* __MINGW32__ */ | |
1332 | ||
a1ec6916 | 1333 | SCM_DEFINE (scm_truncate_file, "truncate-file", 1, 1, 0, |
1bbd0b84 | 1334 | (SCM object, SCM length), |
1e6808ea MG |
1335 | "Truncates the object referred to by @var{object} to at most\n" |
1336 | "@var{length} bytes. @var{object} can be a string containing a\n" | |
1337 | "file name or an integer file descriptor or a port.\n" | |
1338 | "@var{length} may be omitted if @var{object} is not a file name,\n" | |
1339 | "in which case the truncation occurs at the current port.\n" | |
1340 | "position. The return value is unspecified.") | |
1bbd0b84 | 1341 | #define FUNC_NAME s_scm_truncate_file |
840ae05d | 1342 | { |
69bc9ff3 GH |
1343 | int rv; |
1344 | off_t c_length; | |
1345 | ||
1346 | /* object can be a port, fdes or filename. */ | |
840ae05d | 1347 | |
840ae05d JB |
1348 | if (SCM_UNBNDP (length)) |
1349 | { | |
69bc9ff3 | 1350 | /* must supply length if object is a filename. */ |
a6d9e5ab | 1351 | if (SCM_STRINGP (object)) |
34d19ef6 | 1352 | SCM_MISC_ERROR("must supply length if OBJECT is a filename", SCM_EOL); |
69bc9ff3 | 1353 | |
c94577b4 | 1354 | length = scm_seek (object, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); |
840ae05d | 1355 | } |
34d19ef6 | 1356 | c_length = SCM_NUM2LONG (2, length); |
69bc9ff3 | 1357 | if (c_length < 0) |
1bbd0b84 | 1358 | SCM_MISC_ERROR ("negative offset", SCM_EOL); |
3fe6190f | 1359 | |
69bc9ff3 GH |
1360 | object = SCM_COERCE_OUTPORT (object); |
1361 | if (SCM_INUMP (object)) | |
1362 | { | |
1363 | SCM_SYSCALL (rv = ftruncate (SCM_INUM (object), c_length)); | |
1364 | } | |
0c95b57d | 1365 | else if (SCM_OPOUTPORTP (object)) |
69bc9ff3 | 1366 | { |
92c2555f MV |
1367 | scm_t_port *pt = SCM_PTAB_ENTRY (object); |
1368 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); | |
69bc9ff3 | 1369 | |
affc96b5 | 1370 | if (!ptob->truncate) |
1bbd0b84 | 1371 | SCM_MISC_ERROR ("port is not truncatable", SCM_EOL); |
69bc9ff3 | 1372 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1373 | scm_end_input (object); |
69bc9ff3 | 1374 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1375 | ptob->flush (object); |
69bc9ff3 | 1376 | |
affc96b5 | 1377 | ptob->truncate (object, c_length); |
69bc9ff3 GH |
1378 | rv = 0; |
1379 | } | |
1380 | else | |
1381 | { | |
a6d9e5ab | 1382 | SCM_VALIDATE_STRING (1, object); |
a6d9e5ab | 1383 | SCM_SYSCALL (rv = truncate (SCM_STRING_CHARS (object), c_length)); |
69bc9ff3 GH |
1384 | } |
1385 | if (rv == -1) | |
1bbd0b84 | 1386 | SCM_SYSERROR; |
840ae05d JB |
1387 | return SCM_UNSPECIFIED; |
1388 | } | |
1bbd0b84 | 1389 | #undef FUNC_NAME |
840ae05d | 1390 | |
a1ec6916 | 1391 | SCM_DEFINE (scm_port_line, "port-line", 1, 0, 0, |
1bbd0b84 | 1392 | (SCM port), |
e1546b65 | 1393 | "Return the current line number for @var{port}.") |
1bbd0b84 | 1394 | #define FUNC_NAME s_scm_port_line |
0f2d19dd | 1395 | { |
78446828 | 1396 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1397 | SCM_VALIDATE_OPENPORT (1, port); |
360fc44c | 1398 | return SCM_MAKINUM (SCM_LINUM (port)); |
0f2d19dd | 1399 | } |
1bbd0b84 | 1400 | #undef FUNC_NAME |
0f2d19dd | 1401 | |
a1ec6916 | 1402 | SCM_DEFINE (scm_set_port_line_x, "set-port-line!", 2, 0, 0, |
1bbd0b84 | 1403 | (SCM port, SCM line), |
e1546b65 | 1404 | "Set the current line number for @var{port} to @var{line}.") |
1bbd0b84 | 1405 | #define FUNC_NAME s_scm_set_port_line_x |
d043d8c2 | 1406 | { |
360fc44c | 1407 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 HWN |
1408 | SCM_VALIDATE_OPENPORT (1, port); |
1409 | SCM_VALIDATE_INUM (2, line); | |
564478fd GB |
1410 | SCM_PTAB_ENTRY (port)->line_number = SCM_INUM (line); |
1411 | return SCM_UNSPECIFIED; | |
d043d8c2 | 1412 | } |
1bbd0b84 | 1413 | #undef FUNC_NAME |
d043d8c2 | 1414 | |
a1ec6916 | 1415 | SCM_DEFINE (scm_port_column, "port-column", 1, 0, 0, |
1bbd0b84 | 1416 | (SCM port), |
8f85c0c6 | 1417 | "@deffnx {Scheme Procedure} port-line port\n" |
650a1cf9 | 1418 | "Return the current column number or line number of @var{port},\n" |
b380b885 MD |
1419 | "using the current input port if none is specified. If the number is\n" |
1420 | "unknown, the result is #f. Otherwise, the result is a 0-origin integer\n" | |
1421 | "- i.e. the first character of the first line is line 0, column 0.\n" | |
1422 | "(However, when you display a file position, for example in an error\n" | |
650a1cf9 | 1423 | "message, we recommend you add 1 to get 1-origin integers. This is\n" |
b380b885 MD |
1424 | "because lines and column numbers traditionally start with 1, and that is\n" |
1425 | "what non-programmers will find most natural.)") | |
1bbd0b84 | 1426 | #define FUNC_NAME s_scm_port_column |
0f2d19dd | 1427 | { |
78446828 | 1428 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1429 | SCM_VALIDATE_OPENPORT (1, port); |
360fc44c | 1430 | return SCM_MAKINUM (SCM_COL (port)); |
0f2d19dd | 1431 | } |
1bbd0b84 | 1432 | #undef FUNC_NAME |
0f2d19dd | 1433 | |
a1ec6916 | 1434 | SCM_DEFINE (scm_set_port_column_x, "set-port-column!", 2, 0, 0, |
1bbd0b84 | 1435 | (SCM port, SCM column), |
8f85c0c6 | 1436 | "@deffnx {Scheme Procedure} set-port-line! port line\n" |
92ccc1f1 | 1437 | "Set the current column or line number of @var{port}, using the\n" |
b380b885 | 1438 | "current input port if none is specified.") |
1bbd0b84 | 1439 | #define FUNC_NAME s_scm_set_port_column_x |
d043d8c2 | 1440 | { |
360fc44c | 1441 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 HWN |
1442 | SCM_VALIDATE_OPENPORT (1, port); |
1443 | SCM_VALIDATE_INUM (2, column); | |
564478fd GB |
1444 | SCM_PTAB_ENTRY (port)->column_number = SCM_INUM (column); |
1445 | return SCM_UNSPECIFIED; | |
d043d8c2 | 1446 | } |
1bbd0b84 | 1447 | #undef FUNC_NAME |
d043d8c2 | 1448 | |
a1ec6916 | 1449 | SCM_DEFINE (scm_port_filename, "port-filename", 1, 0, 0, |
1bbd0b84 | 1450 | (SCM port), |
b380b885 | 1451 | "Return the filename associated with @var{port}. This function returns\n" |
2a2a730b | 1452 | "the strings \"standard input\", \"standard output\" and \"standard error\"\n" |
a3c8b9fc | 1453 | "when called on the current input, output and error ports respectively.") |
1bbd0b84 | 1454 | #define FUNC_NAME s_scm_port_filename |
0f2d19dd | 1455 | { |
78446828 | 1456 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1457 | SCM_VALIDATE_OPENPORT (1, port); |
b24b5e13 | 1458 | return SCM_FILENAME (port); |
0f2d19dd | 1459 | } |
1bbd0b84 | 1460 | #undef FUNC_NAME |
0f2d19dd | 1461 | |
a1ec6916 | 1462 | SCM_DEFINE (scm_set_port_filename_x, "set-port-filename!", 2, 0, 0, |
1bbd0b84 | 1463 | (SCM port, SCM filename), |
b380b885 MD |
1464 | "Change the filename associated with @var{port}, using the current input\n" |
1465 | "port if none is specified. Note that this does not change the port's\n" | |
1466 | "source of data, but only the value that is returned by\n" | |
1467 | "@code{port-filename} and reported in diagnostic output.") | |
1bbd0b84 | 1468 | #define FUNC_NAME s_scm_set_port_filename_x |
d14af9f2 | 1469 | { |
360fc44c | 1470 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1471 | SCM_VALIDATE_OPENPORT (1, port); |
360fc44c | 1472 | /* We allow the user to set the filename to whatever he likes. */ |
b24b5e13 DH |
1473 | SCM_SET_FILENAME (port, filename); |
1474 | return SCM_UNSPECIFIED; | |
d14af9f2 | 1475 | } |
1bbd0b84 | 1476 | #undef FUNC_NAME |
d14af9f2 | 1477 | |
0f2d19dd JB |
1478 | #ifndef ttyname |
1479 | extern char * ttyname(); | |
1480 | #endif | |
1481 | ||
f12733c9 MD |
1482 | void |
1483 | scm_print_port_mode (SCM exp, SCM port) | |
1484 | { | |
1485 | scm_puts (SCM_CLOSEDP (exp) | |
1486 | ? "closed: " | |
f9a64404 DH |
1487 | : (SCM_RDNG & SCM_CELL_WORD_0 (exp) |
1488 | ? (SCM_WRTNG & SCM_CELL_WORD_0 (exp) | |
f12733c9 MD |
1489 | ? "input-output: " |
1490 | : "input: ") | |
f9a64404 | 1491 | : (SCM_WRTNG & SCM_CELL_WORD_0 (exp) |
f12733c9 MD |
1492 | ? "output: " |
1493 | : "bogus: ")), | |
1494 | port); | |
1495 | } | |
1cc91f1b | 1496 | |
f12733c9 | 1497 | int |
e81d98ec | 1498 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 1499 | { |
f12733c9 MD |
1500 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
1501 | if (!type) | |
1502 | type = "port"; | |
b7f3516f | 1503 | scm_puts ("#<", port); |
f12733c9 | 1504 | scm_print_port_mode (exp, port); |
b7f3516f TT |
1505 | scm_puts (type, port); |
1506 | scm_putc (' ', port); | |
12a8b769 | 1507 | scm_intprint (SCM_CELL_WORD_1 (exp), 16, port); |
b7f3516f | 1508 | scm_putc ('>', port); |
f12733c9 | 1509 | return 1; |
0f2d19dd JB |
1510 | } |
1511 | ||
0f2d19dd JB |
1512 | void |
1513 | scm_ports_prehistory () | |
0f2d19dd JB |
1514 | { |
1515 | scm_numptob = 0; | |
67329a9e | 1516 | scm_ptobs = (scm_t_ptob_descriptor *) scm_malloc (sizeof (scm_t_ptob_descriptor)); |
0f2d19dd | 1517 | } |
0f2d19dd JB |
1518 | |
1519 | \f | |
ee149d03 | 1520 | |
d68fee48 | 1521 | /* Void ports. */ |
0f2d19dd | 1522 | |
92c2555f | 1523 | scm_t_bits scm_tc16_void_port = 0; |
0f2d19dd | 1524 | |
e81d98ec | 1525 | static int fill_input_void_port (SCM port SCM_UNUSED) |
283a1a0e | 1526 | { |
70df8af6 | 1527 | return EOF; |
283a1a0e GH |
1528 | } |
1529 | ||
31703ab8 | 1530 | static void |
e81d98ec DH |
1531 | write_void_port (SCM port SCM_UNUSED, |
1532 | const void *data SCM_UNUSED, | |
1533 | size_t size SCM_UNUSED) | |
31703ab8 GH |
1534 | { |
1535 | } | |
1536 | ||
0f2d19dd | 1537 | SCM |
a284e297 | 1538 | scm_void_port (char *mode_str) |
0f2d19dd | 1539 | { |
0f2d19dd | 1540 | SCM_DEFER_INTS; |
402788a9 HWN |
1541 | { |
1542 | int mode_bits = scm_mode_bits (mode_str); | |
da220f27 HWN |
1543 | SCM answer = scm_new_port_table_entry (scm_tc16_void_port); |
1544 | scm_t_port * pt = SCM_PTAB_ENTRY(answer); | |
1545 | ||
402788a9 | 1546 | scm_port_non_buffer (pt); |
402788a9 HWN |
1547 | |
1548 | SCM_SETSTREAM (answer, 0); | |
1549 | SCM_SET_CELL_TYPE (answer, scm_tc16_void_port | mode_bits); | |
1550 | SCM_ALLOW_INTS; | |
1551 | return answer; | |
1552 | } | |
0f2d19dd JB |
1553 | } |
1554 | ||
a1ec6916 | 1555 | SCM_DEFINE (scm_sys_make_void_port, "%make-void-port", 1, 0, 0, |
1bbd0b84 | 1556 | (SCM mode), |
70df8af6 | 1557 | "Create and return a new void port. A void port acts like\n" |
bb2c02f2 | 1558 | "@file{/dev/null}. The @var{mode} argument\n" |
70df8af6 | 1559 | "specifies the input/output modes for this port: see the\n" |
b380b885 | 1560 | "documentation for @code{open-file} in @ref{File Ports}.") |
1bbd0b84 | 1561 | #define FUNC_NAME s_scm_sys_make_void_port |
0f2d19dd | 1562 | { |
a6d9e5ab | 1563 | SCM_VALIDATE_STRING (1, mode); |
a6d9e5ab | 1564 | return scm_void_port (SCM_STRING_CHARS (mode)); |
0f2d19dd | 1565 | } |
1bbd0b84 | 1566 | #undef FUNC_NAME |
0f2d19dd | 1567 | |
0f2d19dd | 1568 | \f |
89545eba | 1569 | /* Initialization. */ |
1cc91f1b | 1570 | |
0f2d19dd JB |
1571 | void |
1572 | scm_init_ports () | |
0f2d19dd | 1573 | { |
840ae05d | 1574 | /* lseek() symbols. */ |
86d31dfe MV |
1575 | scm_c_define ("SEEK_SET", SCM_MAKINUM (SEEK_SET)); |
1576 | scm_c_define ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR)); | |
1577 | scm_c_define ("SEEK_END", SCM_MAKINUM (SEEK_END)); | |
840ae05d | 1578 | |
70df8af6 GH |
1579 | scm_tc16_void_port = scm_make_port_type ("void", fill_input_void_port, |
1580 | write_void_port); | |
a0599745 | 1581 | #include "libguile/ports.x" |
0f2d19dd | 1582 | } |
89e00824 ML |
1583 | |
1584 | /* | |
1585 | Local Variables: | |
1586 | c-file-style: "gnu" | |
1587 | End: | |
1588 | */ |