Commit | Line | Data |
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185e369a | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003, 2004 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
73be1d9e MV |
8 | * This library 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 GNU | |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
16 | */ | |
1bbd0b84 | 17 | |
1bbd0b84 | 18 | |
0f2d19dd | 19 | \f |
d68fee48 JB |
20 | /* Headers. */ |
21 | ||
bd515f37 RB |
22 | #if HAVE_CONFIG_H |
23 | # include <config.h> | |
24 | #endif | |
25 | ||
0f2d19dd | 26 | #include <stdio.h> |
e6e2e95a MD |
27 | #include <errno.h> |
28 | ||
a0599745 | 29 | #include "libguile/_scm.h" |
f0942910 | 30 | #include "libguile/eval.h" |
a0599745 MD |
31 | #include "libguile/objects.h" |
32 | #include "libguile/smob.h" | |
33 | #include "libguile/chars.h" | |
185e369a | 34 | #include "libguile/dynwind.h" |
0f2d19dd | 35 | |
a0599745 MD |
36 | #include "libguile/keywords.h" |
37 | #include "libguile/root.h" | |
38 | #include "libguile/strings.h" | |
b42170a4 | 39 | #include "libguile/mallocs.h" |
a0599745 MD |
40 | #include "libguile/validate.h" |
41 | #include "libguile/ports.h" | |
0f2d19dd | 42 | |
bd9e24b3 GH |
43 | #ifdef HAVE_STRING_H |
44 | #include <string.h> | |
45 | #endif | |
46 | ||
0f2d19dd | 47 | #ifdef HAVE_MALLOC_H |
95b88819 | 48 | #include <malloc.h> |
0f2d19dd JB |
49 | #endif |
50 | ||
ec65f5da MV |
51 | #ifdef HAVE_IO_H |
52 | #include <io.h> | |
53 | #endif | |
54 | ||
0f2d19dd JB |
55 | #ifdef HAVE_UNISTD_H |
56 | #include <unistd.h> | |
57 | #endif | |
58 | ||
95b88819 GH |
59 | #ifdef HAVE_SYS_IOCTL_H |
60 | #include <sys/ioctl.h> | |
61 | #endif | |
d68fee48 | 62 | |
82893676 MG |
63 | #ifdef __MINGW32__ |
64 | #include <fcntl.h> | |
65 | #define ftruncate(fd, size) chsize (fd, size) | |
66 | #endif | |
67 | ||
0f2d19dd | 68 | \f |
d68fee48 | 69 | /* The port kind table --- a dynamically resized array of port types. */ |
0f2d19dd JB |
70 | |
71 | ||
72 | /* scm_ptobs scm_numptob | |
73 | * implement a dynamicly resized array of ptob records. | |
74 | * Indexes into this table are used when generating type | |
75 | * tags for smobjects (if you know a tag you can get an index and conversely). | |
76 | */ | |
92c2555f | 77 | scm_t_ptob_descriptor *scm_ptobs; |
c014a02e | 78 | long scm_numptob; |
0f2d19dd | 79 | |
ee149d03 | 80 | /* GC marker for a port with stream of SCM type. */ |
0f2d19dd | 81 | SCM |
a284e297 | 82 | scm_markstream (SCM ptr) |
0f2d19dd JB |
83 | { |
84 | int openp; | |
f9a64404 | 85 | openp = SCM_CELL_WORD_0 (ptr) & SCM_OPN; |
0f2d19dd | 86 | if (openp) |
74a16888 | 87 | return SCM_PACK (SCM_STREAM (ptr)); |
0f2d19dd JB |
88 | else |
89 | return SCM_BOOL_F; | |
90 | } | |
91 | ||
f12733c9 | 92 | /* |
f12733c9 | 93 | * We choose to use an interface similar to the smob interface with |
affc96b5 | 94 | * fill_input and write as standard fields, passed to the port |
f12733c9 MD |
95 | * type constructor, and optional fields set by setters. |
96 | */ | |
97 | ||
70df8af6 | 98 | static void |
e81d98ec | 99 | flush_port_default (SCM port SCM_UNUSED) |
70df8af6 GH |
100 | { |
101 | } | |
102 | ||
103 | static void | |
e81d98ec | 104 | end_input_default (SCM port SCM_UNUSED, int offset SCM_UNUSED) |
70df8af6 GH |
105 | { |
106 | } | |
0f2d19dd | 107 | |
4c9419ac MV |
108 | static size_t |
109 | scm_port_free0 (SCM port) | |
110 | { | |
111 | return 0; | |
112 | } | |
113 | ||
92c2555f | 114 | scm_t_bits |
f12733c9 | 115 | scm_make_port_type (char *name, |
affc96b5 | 116 | int (*fill_input) (SCM port), |
8aa011a1 | 117 | void (*write) (SCM port, const void *data, size_t size)) |
0f2d19dd JB |
118 | { |
119 | char *tmp; | |
120 | if (255 <= scm_numptob) | |
121 | goto ptoberr; | |
f12733c9 MD |
122 | SCM_DEFER_INTS; |
123 | SCM_SYSCALL (tmp = (char *) realloc ((char *) scm_ptobs, | |
124 | (1 + scm_numptob) | |
92c2555f | 125 | * sizeof (scm_t_ptob_descriptor))); |
0f2d19dd JB |
126 | if (tmp) |
127 | { | |
92c2555f | 128 | scm_ptobs = (scm_t_ptob_descriptor *) tmp; |
affc96b5 | 129 | |
f12733c9 MD |
130 | scm_ptobs[scm_numptob].name = name; |
131 | scm_ptobs[scm_numptob].mark = 0; | |
4c9419ac | 132 | scm_ptobs[scm_numptob].free = scm_port_free0; |
f12733c9 MD |
133 | scm_ptobs[scm_numptob].print = scm_port_print; |
134 | scm_ptobs[scm_numptob].equalp = 0; | |
affc96b5 GH |
135 | scm_ptobs[scm_numptob].close = 0; |
136 | ||
137 | scm_ptobs[scm_numptob].write = write; | |
70df8af6 | 138 | scm_ptobs[scm_numptob].flush = flush_port_default; |
affc96b5 | 139 | |
70df8af6 | 140 | scm_ptobs[scm_numptob].end_input = end_input_default; |
affc96b5 GH |
141 | scm_ptobs[scm_numptob].fill_input = fill_input; |
142 | scm_ptobs[scm_numptob].input_waiting = 0; | |
143 | ||
f12733c9 | 144 | scm_ptobs[scm_numptob].seek = 0; |
affc96b5 GH |
145 | scm_ptobs[scm_numptob].truncate = 0; |
146 | ||
0f2d19dd JB |
147 | scm_numptob++; |
148 | } | |
f12733c9 | 149 | SCM_ALLOW_INTS; |
0f2d19dd | 150 | if (!tmp) |
2500356c DH |
151 | { |
152 | ptoberr: | |
153 | scm_memory_error ("scm_make_port_type"); | |
154 | } | |
f12733c9 MD |
155 | /* Make a class object if Goops is present */ |
156 | if (scm_port_class) | |
157 | scm_make_port_classes (scm_numptob - 1, SCM_PTOBNAME (scm_numptob - 1)); | |
0f2d19dd JB |
158 | return scm_tc7_port + (scm_numptob - 1) * 256; |
159 | } | |
160 | ||
f12733c9 | 161 | void |
6c747373 | 162 | scm_set_port_mark (long tc, SCM (*mark) (SCM)) |
f12733c9 MD |
163 | { |
164 | scm_ptobs[SCM_TC2PTOBNUM (tc)].mark = mark; | |
165 | } | |
166 | ||
167 | void | |
1be6b49c | 168 | scm_set_port_free (long tc, size_t (*free) (SCM)) |
f12733c9 MD |
169 | { |
170 | scm_ptobs[SCM_TC2PTOBNUM (tc)].free = free; | |
171 | } | |
172 | ||
173 | void | |
6c747373 | 174 | scm_set_port_print (long tc, int (*print) (SCM exp, SCM port, |
f12733c9 MD |
175 | scm_print_state *pstate)) |
176 | { | |
177 | scm_ptobs[SCM_TC2PTOBNUM (tc)].print = print; | |
178 | } | |
179 | ||
180 | void | |
6c747373 | 181 | scm_set_port_equalp (long tc, SCM (*equalp) (SCM, SCM)) |
f12733c9 MD |
182 | { |
183 | scm_ptobs[SCM_TC2PTOBNUM (tc)].equalp = equalp; | |
184 | } | |
185 | ||
31703ab8 | 186 | void |
affc96b5 | 187 | scm_set_port_flush (long tc, void (*flush) (SCM port)) |
31703ab8 | 188 | { |
affc96b5 | 189 | scm_ptobs[SCM_TC2PTOBNUM (tc)].flush = flush; |
31703ab8 GH |
190 | } |
191 | ||
f12733c9 | 192 | void |
affc96b5 | 193 | scm_set_port_end_input (long tc, void (*end_input) (SCM port, int offset)) |
f12733c9 | 194 | { |
affc96b5 | 195 | scm_ptobs[SCM_TC2PTOBNUM (tc)].end_input = end_input; |
f12733c9 MD |
196 | } |
197 | ||
198 | void | |
6c747373 | 199 | scm_set_port_close (long tc, int (*close) (SCM)) |
f12733c9 | 200 | { |
affc96b5 | 201 | scm_ptobs[SCM_TC2PTOBNUM (tc)].close = close; |
f12733c9 MD |
202 | } |
203 | ||
204 | void | |
6c747373 | 205 | scm_set_port_seek (long tc, off_t (*seek) (SCM port, |
f12733c9 MD |
206 | off_t OFFSET, |
207 | int WHENCE)) | |
208 | { | |
209 | scm_ptobs[SCM_TC2PTOBNUM (tc)].seek = seek; | |
210 | } | |
211 | ||
212 | void | |
6c747373 | 213 | scm_set_port_truncate (long tc, void (*truncate) (SCM port, off_t length)) |
f12733c9 | 214 | { |
affc96b5 | 215 | scm_ptobs[SCM_TC2PTOBNUM (tc)].truncate = truncate; |
f12733c9 MD |
216 | } |
217 | ||
218 | void | |
affc96b5 | 219 | scm_set_port_input_waiting (long tc, int (*input_waiting) (SCM)) |
f12733c9 | 220 | { |
affc96b5 | 221 | scm_ptobs[SCM_TC2PTOBNUM (tc)].input_waiting = input_waiting; |
f12733c9 MD |
222 | } |
223 | ||
0f2d19dd | 224 | \f |
0f2d19dd | 225 | |
3b3b36dd | 226 | SCM_DEFINE (scm_char_ready_p, "char-ready?", 0, 1, 0, |
1e6808ea MG |
227 | (SCM port), |
228 | "Return @code{#t} if a character is ready on input @var{port}\n" | |
229 | "and return @code{#f} otherwise. If @code{char-ready?} returns\n" | |
230 | "@code{#t} then the next @code{read-char} operation on\n" | |
231 | "@var{port} is guaranteed not to hang. If @var{port} is a file\n" | |
232 | "port at end of file then @code{char-ready?} returns @code{#t}.\n" | |
c2dfff19 KR |
233 | "\n" |
234 | "@code{char-ready?} exists to make it possible for a\n" | |
1e6808ea MG |
235 | "program to accept characters from interactive ports without\n" |
236 | "getting stuck waiting for input. Any input editors associated\n" | |
237 | "with such ports must make sure that characters whose existence\n" | |
238 | "has been asserted by @code{char-ready?} cannot be rubbed out.\n" | |
239 | "If @code{char-ready?} were to return @code{#f} at end of file,\n" | |
240 | "a port at end of file would be indistinguishable from an\n" | |
c2dfff19 | 241 | "interactive port that has no ready characters.") |
1bbd0b84 | 242 | #define FUNC_NAME s_scm_char_ready_p |
0f2d19dd | 243 | { |
92c2555f | 244 | scm_t_port *pt; |
6c951427 | 245 | |
0f2d19dd JB |
246 | if (SCM_UNBNDP (port)) |
247 | port = scm_cur_inp; | |
248 | else | |
34d19ef6 | 249 | SCM_VALIDATE_OPINPORT (1, port); |
d68fee48 | 250 | |
ae4c4016 JB |
251 | pt = SCM_PTAB_ENTRY (port); |
252 | ||
6c951427 GH |
253 | /* if the current read buffer is filled, or the |
254 | last pushed-back char has been read and the saved buffer is | |
255 | filled, result is true. */ | |
256 | if (pt->read_pos < pt->read_end | |
257 | || (pt->read_buf == pt->putback_buf | |
258 | && pt->saved_read_pos < pt->saved_read_end)) | |
0f2d19dd | 259 | return SCM_BOOL_T; |
ee149d03 JB |
260 | else |
261 | { | |
92c2555f | 262 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
ee149d03 | 263 | |
affc96b5 | 264 | if (ptob->input_waiting) |
7888309b | 265 | return scm_from_bool(ptob->input_waiting (port)); |
ee149d03 | 266 | else |
6c951427 | 267 | return SCM_BOOL_T; |
ee149d03 | 268 | } |
0f2d19dd | 269 | } |
1bbd0b84 | 270 | #undef FUNC_NAME |
0f2d19dd | 271 | |
c2da2648 GH |
272 | /* move up to read_len chars from port's putback and/or read buffers |
273 | into memory starting at dest. returns the number of chars moved. */ | |
274 | size_t scm_take_from_input_buffers (SCM port, char *dest, size_t read_len) | |
275 | { | |
92c2555f | 276 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
c2da2648 GH |
277 | size_t chars_read = 0; |
278 | size_t from_buf = min (pt->read_end - pt->read_pos, read_len); | |
279 | ||
280 | if (from_buf > 0) | |
281 | { | |
282 | memcpy (dest, pt->read_pos, from_buf); | |
283 | pt->read_pos += from_buf; | |
284 | chars_read += from_buf; | |
285 | read_len -= from_buf; | |
286 | dest += from_buf; | |
287 | } | |
288 | ||
289 | /* if putback was active, try the real input buffer too. */ | |
290 | if (pt->read_buf == pt->putback_buf) | |
291 | { | |
292 | from_buf = min (pt->saved_read_end - pt->saved_read_pos, read_len); | |
293 | if (from_buf > 0) | |
294 | { | |
295 | memcpy (dest, pt->saved_read_pos, from_buf); | |
296 | pt->saved_read_pos += from_buf; | |
297 | chars_read += from_buf; | |
298 | } | |
299 | } | |
300 | return chars_read; | |
301 | } | |
302 | ||
6c951427 | 303 | /* Clear a port's read buffers, returning the contents. */ |
a1ec6916 | 304 | SCM_DEFINE (scm_drain_input, "drain-input", 1, 0, 0, |
1bbd0b84 | 305 | (SCM port), |
4a151b3d GH |
306 | "This procedure clears a port's input buffers, similar\n" |
307 | "to the way that force-output clears the output buffer. The\n" | |
308 | "contents of the buffers are returned as a single string, e.g.,\n" | |
309 | "\n" | |
310 | "@lisp\n" | |
311 | "(define p (open-input-file ...))\n" | |
312 | "(drain-input p) => empty string, nothing buffered yet.\n" | |
313 | "(unread-char (read-char p) p)\n" | |
314 | "(drain-input p) => initial chars from p, up to the buffer size.\n" | |
315 | "@end lisp\n\n" | |
316 | "Draining the buffers may be useful for cleanly finishing\n" | |
317 | "buffered I/O so that the file descriptor can be used directly\n" | |
318 | "for further input.") | |
1bbd0b84 | 319 | #define FUNC_NAME s_scm_drain_input |
ee149d03 | 320 | { |
840ae05d | 321 | SCM result; |
28a6e1b0 | 322 | scm_t_port *pt; |
c014a02e | 323 | long count; |
ee149d03 | 324 | |
34d19ef6 | 325 | SCM_VALIDATE_OPINPORT (1, port); |
28a6e1b0 | 326 | pt = SCM_PTAB_ENTRY (port); |
840ae05d | 327 | |
6c951427 GH |
328 | count = pt->read_end - pt->read_pos; |
329 | if (pt->read_buf == pt->putback_buf) | |
330 | count += pt->saved_read_end - pt->saved_read_pos; | |
840ae05d | 331 | |
be54b15d | 332 | result = scm_allocate_string (count); |
d617ee18 | 333 | scm_take_from_input_buffers (port, SCM_I_STRING_CHARS (result), count); |
6c951427 | 334 | |
840ae05d | 335 | return result; |
ee149d03 | 336 | } |
1bbd0b84 | 337 | #undef FUNC_NAME |
0f2d19dd JB |
338 | |
339 | \f | |
d68fee48 | 340 | /* Standard ports --- current input, output, error, and more(!). */ |
0f2d19dd | 341 | |
3b3b36dd | 342 | SCM_DEFINE (scm_current_input_port, "current-input-port", 0, 0, 0, |
e1546b65 MG |
343 | (), |
344 | "Return the current input port. This is the default port used\n" | |
345 | "by many input procedures. Initially, @code{current-input-port}\n" | |
346 | "returns the @dfn{standard input} in Unix and C terminology.") | |
1bbd0b84 | 347 | #define FUNC_NAME s_scm_current_input_port |
0f2d19dd JB |
348 | { |
349 | return scm_cur_inp; | |
350 | } | |
1bbd0b84 | 351 | #undef FUNC_NAME |
0f2d19dd | 352 | |
3b3b36dd | 353 | SCM_DEFINE (scm_current_output_port, "current-output-port", 0, 0, 0, |
e1546b65 MG |
354 | (), |
355 | "Return the current output port. This is the default port used\n" | |
9401323e | 356 | "by many output procedures. Initially,\n" |
e1546b65 MG |
357 | "@code{current-output-port} returns the @dfn{standard output} in\n" |
358 | "Unix and C terminology.") | |
1bbd0b84 | 359 | #define FUNC_NAME s_scm_current_output_port |
0f2d19dd JB |
360 | { |
361 | return scm_cur_outp; | |
362 | } | |
1bbd0b84 | 363 | #undef FUNC_NAME |
0f2d19dd | 364 | |
3b3b36dd | 365 | SCM_DEFINE (scm_current_error_port, "current-error-port", 0, 0, 0, |
1bbd0b84 | 366 | (), |
b380b885 MD |
367 | "Return the port to which errors and warnings should be sent (the\n" |
368 | "@dfn{standard error} in Unix and C terminology).") | |
1bbd0b84 | 369 | #define FUNC_NAME s_scm_current_error_port |
0f2d19dd JB |
370 | { |
371 | return scm_cur_errp; | |
372 | } | |
1bbd0b84 | 373 | #undef FUNC_NAME |
0f2d19dd | 374 | |
3b3b36dd | 375 | SCM_DEFINE (scm_current_load_port, "current-load-port", 0, 0, 0, |
e1546b65 | 376 | (), |
b450f070 | 377 | "Return the current-load-port.\n" |
e1546b65 | 378 | "The load port is used internally by @code{primitive-load}.") |
1bbd0b84 | 379 | #define FUNC_NAME s_scm_current_load_port |
31614d8e MD |
380 | { |
381 | return scm_cur_loadp; | |
382 | } | |
1bbd0b84 | 383 | #undef FUNC_NAME |
31614d8e | 384 | |
3b3b36dd | 385 | SCM_DEFINE (scm_set_current_input_port, "set-current-input-port", 1, 0, 0, |
1bbd0b84 | 386 | (SCM port), |
8f85c0c6 NJ |
387 | "@deffnx {Scheme Procedure} set-current-output-port port\n" |
388 | "@deffnx {Scheme Procedure} set-current-error-port port\n" | |
b380b885 MD |
389 | "Change the ports returned by @code{current-input-port},\n" |
390 | "@code{current-output-port} and @code{current-error-port}, respectively,\n" | |
391 | "so that they use the supplied @var{port} for input or output.") | |
1bbd0b84 | 392 | #define FUNC_NAME s_scm_set_current_input_port |
0f2d19dd JB |
393 | { |
394 | SCM oinp = scm_cur_inp; | |
34d19ef6 | 395 | SCM_VALIDATE_OPINPORT (1, port); |
0f2d19dd JB |
396 | scm_cur_inp = port; |
397 | return oinp; | |
398 | } | |
1bbd0b84 | 399 | #undef FUNC_NAME |
0f2d19dd JB |
400 | |
401 | ||
3b3b36dd | 402 | SCM_DEFINE (scm_set_current_output_port, "set-current-output-port", 1, 0, 0, |
e1546b65 MG |
403 | (SCM port), |
404 | "Set the current default output port to @var{port}.") | |
1bbd0b84 | 405 | #define FUNC_NAME s_scm_set_current_output_port |
0f2d19dd JB |
406 | { |
407 | SCM ooutp = scm_cur_outp; | |
78446828 | 408 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 409 | SCM_VALIDATE_OPOUTPORT (1, port); |
0f2d19dd JB |
410 | scm_cur_outp = port; |
411 | return ooutp; | |
412 | } | |
1bbd0b84 | 413 | #undef FUNC_NAME |
0f2d19dd JB |
414 | |
415 | ||
3b3b36dd | 416 | SCM_DEFINE (scm_set_current_error_port, "set-current-error-port", 1, 0, 0, |
e1546b65 MG |
417 | (SCM port), |
418 | "Set the current default error port to @var{port}.") | |
1bbd0b84 | 419 | #define FUNC_NAME s_scm_set_current_error_port |
0f2d19dd JB |
420 | { |
421 | SCM oerrp = scm_cur_errp; | |
78446828 | 422 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 423 | SCM_VALIDATE_OPOUTPORT (1, port); |
0f2d19dd JB |
424 | scm_cur_errp = port; |
425 | return oerrp; | |
426 | } | |
1bbd0b84 | 427 | #undef FUNC_NAME |
0f2d19dd | 428 | |
185e369a MV |
429 | typedef struct { |
430 | SCM value; | |
431 | SCM (*getter) (void); | |
432 | SCM (*setter) (SCM); | |
433 | } swap_data; | |
434 | ||
435 | static void | |
b42170a4 | 436 | swap_port (SCM scm_data) |
185e369a | 437 | { |
b42170a4 | 438 | swap_data *d = (swap_data *)SCM_MALLOCDATA (scm_data); |
185e369a MV |
439 | SCM t; |
440 | ||
441 | t = d->getter (); | |
442 | d->setter (d->value); | |
443 | d->value = t; | |
444 | } | |
445 | ||
446 | static void | |
07add345 | 447 | scm_frame_current_foo_port (SCM port, |
185e369a MV |
448 | SCM (*getter) (void), SCM (*setter) (SCM)) |
449 | { | |
b42170a4 MV |
450 | SCM scm_data = scm_malloc_obj (sizeof (swap_data)); |
451 | swap_data *data = (swap_data *)SCM_MALLOCDATA (scm_data); | |
452 | data->value = port; | |
453 | data->getter = getter; | |
454 | data->setter = setter; | |
185e369a | 455 | |
16c5cac2 MV |
456 | scm_frame_rewind_handler_with_scm (swap_port, scm_data, |
457 | SCM_F_WIND_EXPLICITLY); | |
458 | scm_frame_unwind_handler_with_scm (swap_port, scm_data, | |
459 | SCM_F_WIND_EXPLICITLY); | |
185e369a MV |
460 | } |
461 | ||
462 | void | |
07add345 | 463 | scm_frame_current_input_port (SCM port) |
185e369a | 464 | { |
07add345 MV |
465 | scm_frame_current_foo_port (port, |
466 | scm_current_input_port, | |
467 | scm_set_current_input_port); | |
185e369a MV |
468 | } |
469 | ||
470 | void | |
07add345 | 471 | scm_frame_current_output_port (SCM port) |
185e369a | 472 | { |
07add345 MV |
473 | scm_frame_current_foo_port (port, |
474 | scm_current_output_port, | |
475 | scm_set_current_output_port); | |
185e369a MV |
476 | } |
477 | ||
478 | void | |
07add345 | 479 | scm_frame_current_error_port (SCM port) |
185e369a | 480 | { |
07add345 MV |
481 | scm_frame_current_foo_port (port, |
482 | scm_current_error_port, | |
483 | scm_set_current_error_port); | |
185e369a MV |
484 | } |
485 | ||
0f2d19dd | 486 | \f |
840ae05d | 487 | /* The port table --- an array of pointers to ports. */ |
0f2d19dd | 488 | |
67329a9e | 489 | scm_t_port **scm_i_port_table; |
0f2d19dd | 490 | |
67329a9e HWN |
491 | long scm_i_port_table_size = 0; /* Number of ports in scm_i_port_table. */ |
492 | long scm_i_port_table_room = 20; /* Size of the array. */ | |
0f2d19dd | 493 | |
b9ad392e MD |
494 | SCM_GLOBAL_MUTEX (scm_i_port_table_mutex); |
495 | ||
496 | /* This function is not and should not be thread safe. */ | |
1cc91f1b | 497 | |
da220f27 HWN |
498 | SCM |
499 | scm_new_port_table_entry (scm_t_bits tag) | |
402788a9 | 500 | #define FUNC_NAME "scm_new_port_table_entry" |
0f2d19dd | 501 | { |
85835e59 HWN |
502 | /* |
503 | We initialize the cell to empty, this is in case scm_gc_calloc | |
504 | triggers GC ; we don't want the GC to scan a half-finished Z. | |
505 | */ | |
506 | ||
67329a9e | 507 | SCM z = scm_cons (SCM_EOL, SCM_EOL); |
39e8f371 | 508 | scm_t_port *entry = (scm_t_port *) scm_gc_calloc (sizeof (scm_t_port), "port"); |
67329a9e | 509 | if (scm_i_port_table_size == scm_i_port_table_room) |
0f2d19dd | 510 | { |
4c9419ac | 511 | /* initial malloc is in gc.c. this doesn't use scm_gc_malloc etc., |
c6c79933 | 512 | since it can never be freed during gc. */ |
67329a9e | 513 | void *newt = scm_realloc ((char *) scm_i_port_table, |
4c9419ac | 514 | (size_t) (sizeof (scm_t_port *) |
67329a9e HWN |
515 | * scm_i_port_table_room * 2)); |
516 | scm_i_port_table = (scm_t_port **) newt; | |
517 | scm_i_port_table_room *= 2; | |
0f2d19dd | 518 | } |
840ae05d | 519 | |
67329a9e | 520 | entry->entry = scm_i_port_table_size; |
5f16b897 | 521 | |
840ae05d | 522 | entry->file_name = SCM_BOOL_F; |
61e452ba | 523 | entry->rw_active = SCM_PORT_NEITHER; |
5f16b897 | 524 | |
67329a9e HWN |
525 | scm_i_port_table[scm_i_port_table_size] = entry; |
526 | scm_i_port_table_size++; | |
840ae05d | 527 | |
da220f27 HWN |
528 | entry->port = z; |
529 | SCM_SET_CELL_TYPE(z, tag); | |
530 | SCM_SETPTAB_ENTRY(z, entry); | |
531 | ||
532 | return z; | |
0f2d19dd | 533 | } |
c6c79933 | 534 | #undef FUNC_NAME |
0f2d19dd | 535 | |
67329a9e HWN |
536 | #if SCM_ENABLE_DEPRECATED==1 |
537 | SCM_API scm_t_port * | |
538 | scm_add_to_port_table (SCM port) | |
539 | { | |
540 | SCM z = scm_new_port_table_entry (scm_tc7_port); | |
541 | scm_t_port * pt = SCM_PTAB_ENTRY(z); | |
542 | ||
543 | pt->port = port; | |
544 | SCM_SETCAR(z, SCM_EOL); | |
545 | SCM_SETCDR(z, SCM_EOL); | |
85835e59 | 546 | SCM_SETPTAB_ENTRY (port, pt); |
67329a9e HWN |
547 | return pt; |
548 | } | |
549 | #endif | |
550 | ||
551 | ||
6c951427 | 552 | /* Remove a port from the table and destroy it. */ |
b9ad392e MD |
553 | |
554 | /* This function is not and should not be thread safe. */ | |
555 | ||
0f2d19dd | 556 | void |
a284e297 | 557 | scm_remove_from_port_table (SCM port) |
db4b4ca6 | 558 | #define FUNC_NAME "scm_remove_from_port_table" |
0f2d19dd | 559 | { |
92c2555f | 560 | scm_t_port *p = SCM_PTAB_ENTRY (port); |
c014a02e | 561 | long i = p->entry; |
6c951427 | 562 | |
67329a9e | 563 | if (i >= scm_i_port_table_size) |
1afff620 | 564 | SCM_MISC_ERROR ("Port not in table: ~S", scm_list_1 (port)); |
6c951427 | 565 | if (p->putback_buf) |
4c9419ac MV |
566 | scm_gc_free (p->putback_buf, p->putback_buf_size, "putback buffer"); |
567 | scm_gc_free (p, sizeof (scm_t_port), "port"); | |
ee1e7e13 MD |
568 | /* Since we have just freed slot i we can shrink the table by moving |
569 | the last entry to that slot... */ | |
67329a9e | 570 | if (i < scm_i_port_table_size - 1) |
0f2d19dd | 571 | { |
67329a9e HWN |
572 | scm_i_port_table[i] = scm_i_port_table[scm_i_port_table_size - 1]; |
573 | scm_i_port_table[i]->entry = i; | |
0f2d19dd | 574 | } |
0f2d19dd | 575 | SCM_SETPTAB_ENTRY (port, 0); |
67329a9e | 576 | scm_i_port_table_size--; |
0f2d19dd | 577 | } |
db4b4ca6 DH |
578 | #undef FUNC_NAME |
579 | ||
0f2d19dd | 580 | |
fea6b4ea | 581 | #ifdef GUILE_DEBUG |
b450f070 | 582 | /* Functions for debugging. */ |
1cc91f1b | 583 | |
3b3b36dd | 584 | SCM_DEFINE (scm_pt_size, "pt-size", 0, 0, 0, |
b450f070 | 585 | (), |
1e6808ea | 586 | "Return the number of ports in the port table. @code{pt-size}\n" |
5352393c | 587 | "is only included in @code{--enable-guile-debug} builds.") |
1bbd0b84 | 588 | #define FUNC_NAME s_scm_pt_size |
0f2d19dd | 589 | { |
e11e83f3 | 590 | return scm_from_int (scm_i_port_table_size); |
0f2d19dd | 591 | } |
1bbd0b84 | 592 | #undef FUNC_NAME |
0f2d19dd | 593 | |
3b3b36dd | 594 | SCM_DEFINE (scm_pt_member, "pt-member", 1, 0, 0, |
b450f070 | 595 | (SCM index), |
1e6808ea | 596 | "Return the port at @var{index} in the port table.\n" |
5352393c MG |
597 | "@code{pt-member} is only included in\n" |
598 | "@code{--enable-guile-debug} builds.") | |
1bbd0b84 | 599 | #define FUNC_NAME s_scm_pt_member |
0f2d19dd | 600 | { |
a55c2b68 MV |
601 | size_t i = scm_to_size_t (index); |
602 | if (i >= scm_i_port_table_size) | |
0f2d19dd JB |
603 | return SCM_BOOL_F; |
604 | else | |
67329a9e | 605 | return scm_i_port_table[i]->port; |
0f2d19dd | 606 | } |
1bbd0b84 | 607 | #undef FUNC_NAME |
0f2d19dd JB |
608 | #endif |
609 | ||
70df8af6 | 610 | void |
92c2555f | 611 | scm_port_non_buffer (scm_t_port *pt) |
70df8af6 GH |
612 | { |
613 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; | |
614 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
615 | pt->read_buf_size = pt->write_buf_size = 1; | |
616 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
617 | } | |
0f2d19dd | 618 | |
d68fee48 JB |
619 | \f |
620 | /* Revealed counts --- an oddity inherited from SCSH. */ | |
621 | ||
8b13c6b3 GH |
622 | /* Find a port in the table and return its revealed count. |
623 | Also used by the garbage collector. | |
0f2d19dd | 624 | */ |
1cc91f1b | 625 | |
0f2d19dd | 626 | int |
a284e297 | 627 | scm_revealed_count (SCM port) |
0f2d19dd JB |
628 | { |
629 | return SCM_REVEALED(port); | |
630 | } | |
631 | ||
632 | ||
633 | ||
634 | /* Return the revealed count for a port. */ | |
635 | ||
3b3b36dd | 636 | SCM_DEFINE (scm_port_revealed, "port-revealed", 1, 0, 0, |
1bbd0b84 | 637 | (SCM port), |
1e6808ea | 638 | "Return the revealed count for @var{port}.") |
1bbd0b84 | 639 | #define FUNC_NAME s_scm_port_revealed |
0f2d19dd | 640 | { |
78446828 | 641 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 642 | SCM_VALIDATE_OPENPORT (1, port); |
e11e83f3 | 643 | return scm_from_int (scm_revealed_count (port)); |
0f2d19dd | 644 | } |
1bbd0b84 | 645 | #undef FUNC_NAME |
0f2d19dd JB |
646 | |
647 | /* Set the revealed count for a port. */ | |
3b3b36dd | 648 | SCM_DEFINE (scm_set_port_revealed_x, "set-port-revealed!", 2, 0, 0, |
1bbd0b84 | 649 | (SCM port, SCM rcount), |
b450f070 | 650 | "Sets the revealed count for a port to a given value.\n" |
b380b885 | 651 | "The return value is unspecified.") |
1bbd0b84 | 652 | #define FUNC_NAME s_scm_set_port_revealed_x |
0f2d19dd | 653 | { |
78446828 | 654 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 655 | SCM_VALIDATE_OPENPORT (1, port); |
a55c2b68 | 656 | SCM_REVEALED (port) = scm_to_int (rcount); |
8b13c6b3 | 657 | return SCM_UNSPECIFIED; |
0f2d19dd | 658 | } |
1bbd0b84 | 659 | #undef FUNC_NAME |
0f2d19dd | 660 | |
d68fee48 JB |
661 | |
662 | \f | |
663 | /* Retrieving a port's mode. */ | |
664 | ||
eadd48de GH |
665 | /* Return the flags that characterize a port based on the mode |
666 | * string used to open a file for that port. | |
667 | * | |
668 | * See PORT FLAGS in scm.h | |
669 | */ | |
670 | ||
671 | long | |
a284e297 | 672 | scm_mode_bits (char *modes) |
eadd48de GH |
673 | { |
674 | return (SCM_OPN | |
675 | | (strchr (modes, 'r') || strchr (modes, '+') ? SCM_RDNG : 0) | |
676 | | ( strchr (modes, 'w') | |
677 | || strchr (modes, 'a') | |
678 | || strchr (modes, '+') ? SCM_WRTNG : 0) | |
ee149d03 JB |
679 | | (strchr (modes, '0') ? SCM_BUF0 : 0) |
680 | | (strchr (modes, 'l') ? SCM_BUFLINE : 0)); | |
eadd48de GH |
681 | } |
682 | ||
d617ee18 MV |
683 | long |
684 | scm_i_mode_bits (SCM modes) | |
685 | { | |
686 | long bits; | |
687 | ||
688 | if (!scm_is_string (modes)) | |
689 | scm_wrong_type_arg_msg (NULL, 0, modes, "string"); | |
690 | ||
691 | bits = scm_mode_bits (SCM_I_STRING_CHARS (modes)); | |
692 | scm_remember_upto_here_1 (modes); | |
693 | return bits; | |
694 | } | |
eadd48de GH |
695 | |
696 | /* Return the mode flags from an open port. | |
697 | * Some modes such as "append" are only used when opening | |
698 | * a file and are not returned here. */ | |
699 | ||
3b3b36dd | 700 | SCM_DEFINE (scm_port_mode, "port-mode", 1, 0, 0, |
1bbd0b84 | 701 | (SCM port), |
1e6808ea MG |
702 | "Return the port modes associated with the open port @var{port}.\n" |
703 | "These will not necessarily be identical to the modes used when\n" | |
704 | "the port was opened, since modes such as \"append\" which are\n" | |
705 | "used only during port creation are not retained.") | |
1bbd0b84 | 706 | #define FUNC_NAME s_scm_port_mode |
eadd48de | 707 | { |
26a3038d | 708 | char modes[4]; |
eadd48de | 709 | modes[0] = '\0'; |
78446828 MV |
710 | |
711 | port = SCM_COERCE_OUTPORT (port); | |
34d19ef6 | 712 | SCM_VALIDATE_OPPORT (1, port); |
f9a64404 DH |
713 | if (SCM_CELL_WORD_0 (port) & SCM_RDNG) { |
714 | if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) | |
eadd48de GH |
715 | strcpy (modes, "r+"); |
716 | else | |
717 | strcpy (modes, "r"); | |
718 | } | |
f9a64404 | 719 | else if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) |
eadd48de | 720 | strcpy (modes, "w"); |
f9a64404 | 721 | if (SCM_CELL_WORD_0 (port) & SCM_BUF0) |
eadd48de | 722 | strcat (modes, "0"); |
36284627 | 723 | return scm_mem2string (modes, strlen (modes)); |
eadd48de | 724 | } |
1bbd0b84 | 725 | #undef FUNC_NAME |
eadd48de GH |
726 | |
727 | ||
d68fee48 JB |
728 | \f |
729 | /* Closing ports. */ | |
730 | ||
0f2d19dd JB |
731 | /* scm_close_port |
732 | * Call the close operation on a port object. | |
eadd48de | 733 | * see also scm_close. |
0f2d19dd | 734 | */ |
3b3b36dd | 735 | SCM_DEFINE (scm_close_port, "close-port", 1, 0, 0, |
1bbd0b84 | 736 | (SCM port), |
1e6808ea MG |
737 | "Close the specified port object. Return @code{#t} if it\n" |
738 | "successfully closes a port or @code{#f} if it was already\n" | |
739 | "closed. An exception may be raised if an error occurs, for\n" | |
740 | "example when flushing buffered output. See also @ref{Ports and\n" | |
741 | "File Descriptors, close}, for a procedure which can close file\n" | |
742 | "descriptors.") | |
1bbd0b84 | 743 | #define FUNC_NAME s_scm_close_port |
0f2d19dd | 744 | { |
1be6b49c | 745 | size_t i; |
eadd48de GH |
746 | int rv; |
747 | ||
78446828 MV |
748 | port = SCM_COERCE_OUTPORT (port); |
749 | ||
7a754ca6 | 750 | SCM_VALIDATE_PORT (1, port); |
0f2d19dd | 751 | if (SCM_CLOSEDP (port)) |
eadd48de | 752 | return SCM_BOOL_F; |
0f2d19dd | 753 | i = SCM_PTOBNUM (port); |
affc96b5 GH |
754 | if (scm_ptobs[i].close) |
755 | rv = (scm_ptobs[i].close) (port); | |
eadd48de GH |
756 | else |
757 | rv = 0; | |
b9ad392e | 758 | scm_mutex_lock (&scm_i_port_table_mutex); |
0f2d19dd | 759 | scm_remove_from_port_table (port); |
b9ad392e | 760 | scm_mutex_unlock (&scm_i_port_table_mutex); |
22a52da1 | 761 | SCM_CLR_PORT_OPEN_FLAG (port); |
7888309b | 762 | return scm_from_bool (rv >= 0); |
7a754ca6 MD |
763 | } |
764 | #undef FUNC_NAME | |
765 | ||
766 | SCM_DEFINE (scm_close_input_port, "close-input-port", 1, 0, 0, | |
767 | (SCM port), | |
768 | "Close the specified input port object. The routine has no effect if\n" | |
769 | "the file has already been closed. An exception may be raised if an\n" | |
770 | "error occurs. The value returned is unspecified.\n\n" | |
771 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
772 | "which can close file descriptors.") | |
773 | #define FUNC_NAME s_scm_close_input_port | |
774 | { | |
775 | SCM_VALIDATE_INPUT_PORT (1, port); | |
776 | scm_close_port (port); | |
777 | return SCM_UNSPECIFIED; | |
778 | } | |
779 | #undef FUNC_NAME | |
780 | ||
781 | SCM_DEFINE (scm_close_output_port, "close-output-port", 1, 0, 0, | |
782 | (SCM port), | |
783 | "Close the specified output port object. The routine has no effect if\n" | |
784 | "the file has already been closed. An exception may be raised if an\n" | |
785 | "error occurs. The value returned is unspecified.\n\n" | |
786 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
787 | "which can close file descriptors.") | |
788 | #define FUNC_NAME s_scm_close_output_port | |
789 | { | |
790 | port = SCM_COERCE_OUTPORT (port); | |
791 | SCM_VALIDATE_OUTPUT_PORT (1, port); | |
792 | scm_close_port (port); | |
793 | return SCM_UNSPECIFIED; | |
0f2d19dd | 794 | } |
1bbd0b84 | 795 | #undef FUNC_NAME |
0f2d19dd | 796 | |
c536b4b3 MV |
797 | void |
798 | scm_c_port_for_each (void (*proc)(void *data, SCM p), void *data) | |
c2ca4493 | 799 | { |
c014a02e | 800 | long i; |
fdfe6305 MV |
801 | SCM ports; |
802 | ||
fdfe6305 MV |
803 | /* Even without pre-emptive multithreading, running arbitrary code |
804 | while scanning the port table is unsafe because the port table | |
805 | can change arbitrarily (from a GC, for example). So we build a | |
806 | list in advance while blocking the GC. -mvo */ | |
807 | ||
b9ad392e | 808 | scm_mutex_lock (&scm_i_port_table_mutex); |
fdfe6305 MV |
809 | scm_block_gc++; |
810 | ports = SCM_EOL; | |
67329a9e HWN |
811 | for (i = 0; i < scm_i_port_table_size; i++) |
812 | ports = scm_cons (scm_i_port_table[i]->port, ports); | |
fdfe6305 | 813 | scm_block_gc--; |
b9ad392e | 814 | scm_mutex_unlock (&scm_i_port_table_mutex); |
fdfe6305 MV |
815 | |
816 | while (ports != SCM_EOL) | |
c2ca4493 | 817 | { |
c536b4b3 | 818 | proc (data, SCM_CAR (ports)); |
fdfe6305 | 819 | ports = SCM_CDR (ports); |
c2ca4493 | 820 | } |
c536b4b3 | 821 | } |
fdfe6305 | 822 | |
c536b4b3 MV |
823 | SCM_DEFINE (scm_port_for_each, "port-for-each", 1, 0, 0, |
824 | (SCM proc), | |
825 | "Apply @var{proc} to each port in the Guile port table\n" | |
826 | "in turn. The return value is unspecified. More specifically,\n" | |
827 | "@var{proc} is applied exactly once to every port that exists\n" | |
828 | "in the system at the time @var{port-for-each} is invoked.\n" | |
829 | "Changes to the port table while @var{port-for-each} is running\n" | |
830 | "have no effect as far as @var{port-for-each} is concerned.") | |
831 | #define FUNC_NAME s_scm_port_for_each | |
832 | { | |
833 | SCM_VALIDATE_PROC (1, proc); | |
834 | ||
835 | scm_c_port_for_each ((void (*)(void*,SCM))scm_call_1, proc); | |
c2ca4493 GH |
836 | return SCM_UNSPECIFIED; |
837 | } | |
838 | #undef FUNC_NAME | |
839 | ||
c536b4b3 | 840 | |
d68fee48 JB |
841 | \f |
842 | /* Utter miscellany. Gosh, we should clean this up some time. */ | |
843 | ||
3b3b36dd | 844 | SCM_DEFINE (scm_input_port_p, "input-port?", 1, 0, 0, |
1bbd0b84 | 845 | (SCM x), |
1e6808ea MG |
846 | "Return @code{#t} if @var{x} is an input port, otherwise return\n" |
847 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
848 | "@code{port?}.") | |
1bbd0b84 | 849 | #define FUNC_NAME s_scm_input_port_p |
0f2d19dd | 850 | { |
7888309b | 851 | return scm_from_bool (SCM_INPUT_PORT_P (x)); |
0f2d19dd | 852 | } |
1bbd0b84 | 853 | #undef FUNC_NAME |
0f2d19dd | 854 | |
3b3b36dd | 855 | SCM_DEFINE (scm_output_port_p, "output-port?", 1, 0, 0, |
1bbd0b84 | 856 | (SCM x), |
1e6808ea MG |
857 | "Return @code{#t} if @var{x} is an output port, otherwise return\n" |
858 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
859 | "@code{port?}.") | |
1bbd0b84 | 860 | #define FUNC_NAME s_scm_output_port_p |
0f2d19dd | 861 | { |
82893676 | 862 | x = SCM_COERCE_OUTPORT (x); |
7888309b | 863 | return scm_from_bool (SCM_OUTPUT_PORT_P (x)); |
0f2d19dd | 864 | } |
1bbd0b84 | 865 | #undef FUNC_NAME |
0f2d19dd | 866 | |
eb5c0a2a GH |
867 | SCM_DEFINE (scm_port_p, "port?", 1, 0, 0, |
868 | (SCM x), | |
1e6808ea | 869 | "Return a boolean indicating whether @var{x} is a port.\n" |
5352393c MG |
870 | "Equivalent to @code{(or (input-port? @var{x}) (output-port?\n" |
871 | "@var{x}))}.") | |
eb5c0a2a GH |
872 | #define FUNC_NAME s_scm_port_p |
873 | { | |
7888309b | 874 | return scm_from_bool (SCM_PORTP (x)); |
eb5c0a2a GH |
875 | } |
876 | #undef FUNC_NAME | |
877 | ||
3b3b36dd | 878 | SCM_DEFINE (scm_port_closed_p, "port-closed?", 1, 0, 0, |
1bbd0b84 | 879 | (SCM port), |
1e6808ea MG |
880 | "Return @code{#t} if @var{port} is closed or @code{#f} if it is\n" |
881 | "open.") | |
1bbd0b84 | 882 | #define FUNC_NAME s_scm_port_closed_p |
60d0643d | 883 | { |
34d19ef6 | 884 | SCM_VALIDATE_PORT (1, port); |
7888309b | 885 | return scm_from_bool (!SCM_OPPORTP (port)); |
60d0643d | 886 | } |
1bbd0b84 | 887 | #undef FUNC_NAME |
0f2d19dd | 888 | |
3b3b36dd | 889 | SCM_DEFINE (scm_eof_object_p, "eof-object?", 1, 0, 0, |
1bbd0b84 | 890 | (SCM x), |
1e6808ea MG |
891 | "Return @code{#t} if @var{x} is an end-of-file object; otherwise\n" |
892 | "return @code{#f}.") | |
1bbd0b84 | 893 | #define FUNC_NAME s_scm_eof_object_p |
0f2d19dd | 894 | { |
7888309b | 895 | return scm_from_bool(SCM_EOF_OBJECT_P (x)); |
0f2d19dd | 896 | } |
1bbd0b84 | 897 | #undef FUNC_NAME |
0f2d19dd | 898 | |
3b3b36dd | 899 | SCM_DEFINE (scm_force_output, "force-output", 0, 1, 0, |
1bbd0b84 | 900 | (SCM port), |
b380b885 | 901 | "Flush the specified output port, or the current output port if @var{port}\n" |
9401323e | 902 | "is omitted. The current output buffer contents are passed to the\n" |
b380b885 MD |
903 | "underlying port implementation (e.g., in the case of fports, the\n" |
904 | "data will be written to the file and the output buffer will be cleared.)\n" | |
905 | "It has no effect on an unbuffered port.\n\n" | |
906 | "The return value is unspecified.") | |
1bbd0b84 | 907 | #define FUNC_NAME s_scm_force_output |
0f2d19dd JB |
908 | { |
909 | if (SCM_UNBNDP (port)) | |
3e877d15 | 910 | port = scm_cur_outp; |
0f2d19dd | 911 | else |
78446828 MV |
912 | { |
913 | port = SCM_COERCE_OUTPORT (port); | |
34d19ef6 | 914 | SCM_VALIDATE_OPOUTPORT (1, port); |
78446828 | 915 | } |
affc96b5 | 916 | scm_flush (port); |
ee149d03 | 917 | return SCM_UNSPECIFIED; |
0f2d19dd | 918 | } |
1bbd0b84 | 919 | #undef FUNC_NAME |
0f2d19dd | 920 | |
a1ec6916 | 921 | SCM_DEFINE (scm_flush_all_ports, "flush-all-ports", 0, 0, 0, |
1bbd0b84 | 922 | (), |
b380b885 MD |
923 | "Equivalent to calling @code{force-output} on\n" |
924 | "all open output ports. The return value is unspecified.") | |
1bbd0b84 | 925 | #define FUNC_NAME s_scm_flush_all_ports |
89ea5b7c | 926 | { |
1be6b49c | 927 | size_t i; |
89ea5b7c | 928 | |
b9ad392e | 929 | scm_mutex_lock (&scm_i_port_table_mutex); |
67329a9e | 930 | for (i = 0; i < scm_i_port_table_size; i++) |
89ea5b7c | 931 | { |
67329a9e HWN |
932 | if (SCM_OPOUTPORTP (scm_i_port_table[i]->port)) |
933 | scm_flush (scm_i_port_table[i]->port); | |
89ea5b7c | 934 | } |
b9ad392e | 935 | scm_mutex_unlock (&scm_i_port_table_mutex); |
89ea5b7c GH |
936 | return SCM_UNSPECIFIED; |
937 | } | |
1bbd0b84 | 938 | #undef FUNC_NAME |
0f2d19dd | 939 | |
3b3b36dd | 940 | SCM_DEFINE (scm_read_char, "read-char", 0, 1, 0, |
1bbd0b84 | 941 | (SCM port), |
1e6808ea MG |
942 | "Return the next character available from @var{port}, updating\n" |
943 | "@var{port} to point to the following character. If no more\n" | |
944 | "characters are available, the end-of-file object is returned.") | |
1bbd0b84 | 945 | #define FUNC_NAME s_scm_read_char |
0f2d19dd JB |
946 | { |
947 | int c; | |
948 | if (SCM_UNBNDP (port)) | |
334341aa | 949 | port = scm_cur_inp; |
34d19ef6 | 950 | SCM_VALIDATE_OPINPORT (1, port); |
b7f3516f | 951 | c = scm_getc (port); |
0f2d19dd JB |
952 | if (EOF == c) |
953 | return SCM_EOF_VAL; | |
7866a09b | 954 | return SCM_MAKE_CHAR (c); |
0f2d19dd | 955 | } |
1bbd0b84 | 956 | #undef FUNC_NAME |
0f2d19dd | 957 | |
5c070ca7 | 958 | /* this should only be called when the read buffer is empty. it |
affc96b5 | 959 | tries to refill the read buffer. it returns the first char from |
5c070ca7 | 960 | the port, which is either EOF or *(pt->read_pos). */ |
6c951427 | 961 | int |
affc96b5 | 962 | scm_fill_input (SCM port) |
6c951427 | 963 | { |
92c2555f | 964 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e | 965 | |
6c951427 GH |
966 | if (pt->read_buf == pt->putback_buf) |
967 | { | |
968 | /* finished reading put-back chars. */ | |
969 | pt->read_buf = pt->saved_read_buf; | |
970 | pt->read_pos = pt->saved_read_pos; | |
971 | pt->read_end = pt->saved_read_end; | |
972 | pt->read_buf_size = pt->saved_read_buf_size; | |
973 | if (pt->read_pos < pt->read_end) | |
5c070ca7 | 974 | return *(pt->read_pos); |
6c951427 | 975 | } |
affc96b5 | 976 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
6c951427 GH |
977 | } |
978 | ||
ee149d03 | 979 | int |
a284e297 | 980 | scm_getc (SCM port) |
0f2d19dd JB |
981 | { |
982 | int c; | |
92c2555f | 983 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 | 984 | |
840ae05d | 985 | if (pt->rw_active == SCM_PORT_WRITE) |
aab1caad RB |
986 | /* may be marginally faster than calling scm_flush. */ |
987 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
6c951427 | 988 | |
5c070ca7 GH |
989 | if (pt->rw_random) |
990 | pt->rw_active = SCM_PORT_READ; | |
991 | ||
992 | if (pt->read_pos >= pt->read_end) | |
ee149d03 | 993 | { |
affc96b5 | 994 | if (scm_fill_input (port) == EOF) |
5c070ca7 | 995 | return EOF; |
ee149d03 JB |
996 | } |
997 | ||
5c070ca7 | 998 | c = *(pt->read_pos++); |
840ae05d | 999 | |
aab1caad | 1000 | switch (c) |
ee149d03 | 1001 | { |
aab1caad RB |
1002 | case '\n': |
1003 | SCM_INCLINE (port); | |
1004 | break; | |
1005 | case '\t': | |
1006 | SCM_TABCOL (port); | |
1007 | break; | |
1008 | default: | |
1009 | SCM_INCCOL (port); | |
1010 | break; | |
ee149d03 | 1011 | } |
aab1caad | 1012 | |
ee149d03 | 1013 | return c; |
0f2d19dd JB |
1014 | } |
1015 | ||
ee149d03 | 1016 | void |
a284e297 | 1017 | scm_putc (char c, SCM port) |
ee149d03 | 1018 | { |
265e6a4d | 1019 | scm_lfwrite (&c, 1, port); |
ee149d03 | 1020 | } |
3cb988bd | 1021 | |
ee149d03 | 1022 | void |
70d63753 | 1023 | scm_puts (const char *s, SCM port) |
3cb988bd | 1024 | { |
265e6a4d | 1025 | scm_lfwrite (s, strlen (s), port); |
ee149d03 | 1026 | } |
3cb988bd | 1027 | |
6fe692e9 MD |
1028 | /* scm_lfwrite |
1029 | * | |
53802ea8 MV |
1030 | * This function differs from scm_c_write; it updates port line and |
1031 | * column. */ | |
6fe692e9 | 1032 | |
ee149d03 | 1033 | void |
1be6b49c | 1034 | scm_lfwrite (const char *ptr, size_t size, SCM port) |
ee149d03 | 1035 | { |
92c2555f MV |
1036 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1037 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
3e2043c4 | 1038 | |
840ae05d | 1039 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1040 | scm_end_input (port); |
283a1a0e | 1041 | |
31703ab8 | 1042 | ptob->write (port, ptr, size); |
840ae05d | 1043 | |
53802ea8 MV |
1044 | for (; size; ptr++, size--) { |
1045 | if (*ptr == '\n') { | |
1046 | SCM_INCLINE(port); | |
1047 | } | |
1048 | else if (*ptr == '\t') { | |
1049 | SCM_TABCOL(port); | |
1050 | } | |
1051 | else { | |
1052 | SCM_INCCOL(port); | |
1053 | } | |
1054 | } | |
1055 | ||
840ae05d JB |
1056 | if (pt->rw_random) |
1057 | pt->rw_active = SCM_PORT_WRITE; | |
ee149d03 | 1058 | } |
3cb988bd | 1059 | |
6fe692e9 MD |
1060 | /* scm_c_read |
1061 | * | |
1062 | * Used by an application to read arbitrary number of bytes from an | |
1063 | * SCM port. Same semantics as libc read, except that scm_c_read only | |
1064 | * returns less than SIZE bytes if at end-of-file. | |
1065 | * | |
1066 | * Warning: Doesn't update port line and column counts! */ | |
1067 | ||
1be6b49c ML |
1068 | size_t |
1069 | scm_c_read (SCM port, void *buffer, size_t size) | |
6fe692e9 | 1070 | { |
92c2555f | 1071 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1be6b49c | 1072 | size_t n_read = 0, n_available; |
6fe692e9 MD |
1073 | |
1074 | if (pt->rw_active == SCM_PORT_WRITE) | |
1075 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
1076 | ||
1077 | if (pt->rw_random) | |
1078 | pt->rw_active = SCM_PORT_READ; | |
1079 | ||
1080 | if (SCM_READ_BUFFER_EMPTY_P (pt)) | |
1081 | { | |
1082 | if (scm_fill_input (port) == EOF) | |
1083 | return 0; | |
1084 | } | |
1085 | ||
1086 | n_available = pt->read_end - pt->read_pos; | |
1087 | ||
1088 | while (n_available < size) | |
1089 | { | |
1090 | memcpy (buffer, pt->read_pos, n_available); | |
910d1e40 | 1091 | buffer = (char *) buffer + n_available; |
6fe692e9 MD |
1092 | pt->read_pos += n_available; |
1093 | n_read += n_available; | |
1094 | ||
1095 | if (SCM_READ_BUFFER_EMPTY_P (pt)) | |
1096 | { | |
1097 | if (scm_fill_input (port) == EOF) | |
1098 | return n_read; | |
1099 | } | |
1100 | ||
1101 | size -= n_available; | |
1102 | n_available = pt->read_end - pt->read_pos; | |
1103 | } | |
1104 | ||
1105 | memcpy (buffer, pt->read_pos, size); | |
1106 | pt->read_pos += size; | |
1107 | ||
1108 | return n_read + size; | |
1109 | } | |
1110 | ||
1111 | /* scm_c_write | |
1112 | * | |
1113 | * Used by an application to write arbitrary number of bytes to an SCM | |
1114 | * port. Similar semantics as libc write. However, unlike libc | |
1115 | * write, scm_c_write writes the requested number of bytes and has no | |
1116 | * return value. | |
1117 | * | |
1118 | * Warning: Doesn't update port line and column counts! | |
1119 | */ | |
1120 | ||
1121 | void | |
1be6b49c | 1122 | scm_c_write (SCM port, const void *ptr, size_t size) |
6fe692e9 | 1123 | { |
92c2555f MV |
1124 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1125 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
6fe692e9 MD |
1126 | |
1127 | if (pt->rw_active == SCM_PORT_READ) | |
1128 | scm_end_input (port); | |
1129 | ||
1130 | ptob->write (port, ptr, size); | |
1131 | ||
1132 | if (pt->rw_random) | |
1133 | pt->rw_active = SCM_PORT_WRITE; | |
1134 | } | |
3cb988bd | 1135 | |
ee149d03 | 1136 | void |
a284e297 | 1137 | scm_flush (SCM port) |
ee149d03 | 1138 | { |
c014a02e | 1139 | long i = SCM_PTOBNUM (port); |
affc96b5 | 1140 | (scm_ptobs[i].flush) (port); |
ee149d03 JB |
1141 | } |
1142 | ||
283a1a0e | 1143 | void |
a284e297 | 1144 | scm_end_input (SCM port) |
283a1a0e | 1145 | { |
c014a02e | 1146 | long offset; |
92c2555f | 1147 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e GH |
1148 | |
1149 | if (pt->read_buf == pt->putback_buf) | |
1150 | { | |
1151 | offset = pt->read_end - pt->read_pos; | |
1152 | pt->read_buf = pt->saved_read_buf; | |
1153 | pt->read_pos = pt->saved_read_pos; | |
1154 | pt->read_end = pt->saved_read_end; | |
1155 | pt->read_buf_size = pt->saved_read_buf_size; | |
1156 | } | |
1157 | else | |
1158 | offset = 0; | |
1159 | ||
affc96b5 | 1160 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
283a1a0e GH |
1161 | } |
1162 | ||
ee149d03 JB |
1163 | \f |
1164 | ||
1165 | ||
1166 | void | |
a284e297 | 1167 | scm_ungetc (int c, SCM port) |
c6c79933 | 1168 | #define FUNC_NAME "scm_ungetc" |
ee149d03 | 1169 | { |
92c2555f | 1170 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
840ae05d | 1171 | |
6c951427 GH |
1172 | if (pt->read_buf == pt->putback_buf) |
1173 | /* already using the put-back buffer. */ | |
1174 | { | |
1175 | /* enlarge putback_buf if necessary. */ | |
1176 | if (pt->read_end == pt->read_buf + pt->read_buf_size | |
1177 | && pt->read_buf == pt->read_pos) | |
1178 | { | |
1be6b49c | 1179 | size_t new_size = pt->read_buf_size * 2; |
c6c79933 | 1180 | unsigned char *tmp = (unsigned char *) |
4c9419ac MV |
1181 | scm_gc_realloc (pt->putback_buf, pt->read_buf_size, new_size, |
1182 | "putback buffer"); | |
6c951427 | 1183 | |
6c951427 GH |
1184 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; |
1185 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
1186 | pt->read_buf_size = pt->putback_buf_size = new_size; | |
1187 | } | |
1188 | ||
1189 | /* shift any existing bytes to buffer + 1. */ | |
1190 | if (pt->read_pos == pt->read_end) | |
1191 | pt->read_end = pt->read_buf + 1; | |
1192 | else if (pt->read_pos != pt->read_buf + 1) | |
1193 | { | |
1194 | int count = pt->read_end - pt->read_pos; | |
1195 | ||
1196 | memmove (pt->read_buf + 1, pt->read_pos, count); | |
1197 | pt->read_end = pt->read_buf + 1 + count; | |
1198 | } | |
1199 | ||
1200 | pt->read_pos = pt->read_buf; | |
1201 | } | |
1202 | else | |
1203 | /* switch to the put-back buffer. */ | |
1204 | { | |
1205 | if (pt->putback_buf == NULL) | |
1206 | { | |
c357d546 | 1207 | pt->putback_buf |
4c9419ac MV |
1208 | = (unsigned char *) scm_gc_malloc (SCM_INITIAL_PUTBACK_BUF_SIZE, |
1209 | "putback buffer"); | |
6c951427 GH |
1210 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; |
1211 | } | |
1212 | ||
1213 | pt->saved_read_buf = pt->read_buf; | |
1214 | pt->saved_read_pos = pt->read_pos; | |
1215 | pt->saved_read_end = pt->read_end; | |
1216 | pt->saved_read_buf_size = pt->read_buf_size; | |
1217 | ||
1218 | pt->read_pos = pt->read_buf = pt->putback_buf; | |
1219 | pt->read_end = pt->read_buf + 1; | |
1220 | pt->read_buf_size = pt->putback_buf_size; | |
1221 | } | |
1222 | ||
1223 | *pt->read_buf = c; | |
ee149d03 | 1224 | |
840ae05d JB |
1225 | if (pt->rw_random) |
1226 | pt->rw_active = SCM_PORT_READ; | |
1227 | ||
ee149d03 JB |
1228 | if (c == '\n') |
1229 | { | |
1230 | /* What should col be in this case? | |
1231 | * We'll leave it at -1. | |
1232 | */ | |
1233 | SCM_LINUM (port) -= 1; | |
1234 | } | |
1235 | else | |
1236 | SCM_COL(port) -= 1; | |
1237 | } | |
c6c79933 | 1238 | #undef FUNC_NAME |
ee149d03 JB |
1239 | |
1240 | ||
1241 | void | |
70d63753 | 1242 | scm_ungets (const char *s, int n, SCM port) |
ee149d03 JB |
1243 | { |
1244 | /* This is simple minded and inefficient, but unreading strings is | |
1245 | * probably not a common operation, and remember that line and | |
1246 | * column numbers have to be handled... | |
1247 | * | |
1248 | * Please feel free to write an optimized version! | |
1249 | */ | |
1250 | while (n--) | |
1251 | scm_ungetc (s[n], port); | |
1252 | } | |
1253 | ||
1254 | ||
3b3b36dd | 1255 | SCM_DEFINE (scm_peek_char, "peek-char", 0, 1, 0, |
1bbd0b84 | 1256 | (SCM port), |
1e6808ea MG |
1257 | "Return the next character available from @var{port},\n" |
1258 | "@emph{without} updating @var{port} to point to the following\n" | |
1259 | "character. If no more characters are available, the\n" | |
c2dfff19 KR |
1260 | "end-of-file object is returned.\n" |
1261 | "\n" | |
1262 | "The value returned by\n" | |
1e6808ea MG |
1263 | "a call to @code{peek-char} is the same as the value that would\n" |
1264 | "have been returned by a call to @code{read-char} on the same\n" | |
1265 | "port. The only difference is that the very next call to\n" | |
1266 | "@code{read-char} or @code{peek-char} on that @var{port} will\n" | |
1267 | "return the value returned by the preceding call to\n" | |
1268 | "@code{peek-char}. In particular, a call to @code{peek-char} on\n" | |
1269 | "an interactive port will hang waiting for input whenever a call\n" | |
c2dfff19 | 1270 | "to @code{read-char} would have hung.") |
1bbd0b84 | 1271 | #define FUNC_NAME s_scm_peek_char |
ee149d03 | 1272 | { |
1a973c42 | 1273 | int c, column; |
ee149d03 JB |
1274 | if (SCM_UNBNDP (port)) |
1275 | port = scm_cur_inp; | |
1276 | else | |
34d19ef6 | 1277 | SCM_VALIDATE_OPINPORT (1, port); |
1a973c42 | 1278 | column = SCM_COL(port); |
ee149d03 JB |
1279 | c = scm_getc (port); |
1280 | if (EOF == c) | |
1281 | return SCM_EOF_VAL; | |
1282 | scm_ungetc (c, port); | |
1a973c42 | 1283 | SCM_COL(port) = column; |
7866a09b | 1284 | return SCM_MAKE_CHAR (c); |
3cb988bd | 1285 | } |
1bbd0b84 | 1286 | #undef FUNC_NAME |
3cb988bd | 1287 | |
1be4270a | 1288 | SCM_DEFINE (scm_unread_char, "unread-char", 1, 1, 0, |
1bbd0b84 | 1289 | (SCM cobj, SCM port), |
b380b885 MD |
1290 | "Place @var{char} in @var{port} so that it will be read by the\n" |
1291 | "next read operation. If called multiple times, the unread characters\n" | |
1292 | "will be read again in last-in first-out order. If @var{port} is\n" | |
1293 | "not supplied, the current input port is used.") | |
1bbd0b84 | 1294 | #define FUNC_NAME s_scm_unread_char |
0f2d19dd JB |
1295 | { |
1296 | int c; | |
1297 | ||
34d19ef6 | 1298 | SCM_VALIDATE_CHAR (1, cobj); |
0f2d19dd JB |
1299 | if (SCM_UNBNDP (port)) |
1300 | port = scm_cur_inp; | |
1301 | else | |
34d19ef6 | 1302 | SCM_VALIDATE_OPINPORT (2, port); |
0f2d19dd | 1303 | |
7866a09b | 1304 | c = SCM_CHAR (cobj); |
0f2d19dd | 1305 | |
b7f3516f | 1306 | scm_ungetc (c, port); |
0f2d19dd JB |
1307 | return cobj; |
1308 | } | |
1bbd0b84 | 1309 | #undef FUNC_NAME |
0f2d19dd | 1310 | |
a1ec6916 | 1311 | SCM_DEFINE (scm_unread_string, "unread-string", 2, 0, 0, |
1bbd0b84 | 1312 | (SCM str, SCM port), |
b380b885 MD |
1313 | "Place the string @var{str} in @var{port} so that its characters will be\n" |
1314 | "read in subsequent read operations. If called multiple times, the\n" | |
1315 | "unread characters will be read again in last-in first-out order. If\n" | |
1316 | "@var{port} is not supplied, the current-input-port is used.") | |
1bbd0b84 | 1317 | #define FUNC_NAME s_scm_unread_string |
ee1e7e13 | 1318 | { |
34d19ef6 | 1319 | SCM_VALIDATE_STRING (1, str); |
ee1e7e13 MD |
1320 | if (SCM_UNBNDP (port)) |
1321 | port = scm_cur_inp; | |
1322 | else | |
34d19ef6 | 1323 | SCM_VALIDATE_OPINPORT (2, port); |
ee1e7e13 | 1324 | |
d617ee18 | 1325 | scm_ungets (SCM_I_STRING_CHARS (str), SCM_I_STRING_LENGTH (str), port); |
ee1e7e13 MD |
1326 | |
1327 | return str; | |
1328 | } | |
1bbd0b84 | 1329 | #undef FUNC_NAME |
ee1e7e13 | 1330 | |
a1ec6916 | 1331 | SCM_DEFINE (scm_seek, "seek", 3, 0, 0, |
1e6808ea MG |
1332 | (SCM fd_port, SCM offset, SCM whence), |
1333 | "Sets the current position of @var{fd/port} to the integer\n" | |
1334 | "@var{offset}, which is interpreted according to the value of\n" | |
1335 | "@var{whence}.\n" | |
1336 | "\n" | |
1337 | "One of the following variables should be supplied for\n" | |
1338 | "@var{whence}:\n" | |
b380b885 MD |
1339 | "@defvar SEEK_SET\n" |
1340 | "Seek from the beginning of the file.\n" | |
1341 | "@end defvar\n" | |
1342 | "@defvar SEEK_CUR\n" | |
1343 | "Seek from the current position.\n" | |
1344 | "@end defvar\n" | |
1345 | "@defvar SEEK_END\n" | |
1346 | "Seek from the end of the file.\n" | |
1e6808ea MG |
1347 | "@end defvar\n" |
1348 | "If @var{fd/port} is a file descriptor, the underlying system\n" | |
1349 | "call is @code{lseek}. @var{port} may be a string port.\n" | |
1350 | "\n" | |
1351 | "The value returned is the new position in the file. This means\n" | |
1352 | "that the current position of a port can be obtained using:\n" | |
1353 | "@lisp\n" | |
b380b885 | 1354 | "(seek port 0 SEEK_CUR)\n" |
1e6808ea | 1355 | "@end lisp") |
1bbd0b84 | 1356 | #define FUNC_NAME s_scm_seek |
840ae05d JB |
1357 | { |
1358 | off_t off; | |
1359 | off_t rv; | |
1360 | int how; | |
1361 | ||
1e6808ea | 1362 | fd_port = SCM_COERCE_OUTPORT (fd_port); |
840ae05d | 1363 | |
a55c2b68 MV |
1364 | if (sizeof (off_t) == sizeof (scm_t_intmax)) |
1365 | off = scm_to_intmax (offset); | |
1366 | else | |
1367 | off = scm_to_long (offset); | |
1368 | how = scm_to_int (whence); | |
1369 | ||
840ae05d | 1370 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) |
1bbd0b84 | 1371 | SCM_OUT_OF_RANGE (3, whence); |
1e6808ea | 1372 | if (SCM_OPPORTP (fd_port)) |
840ae05d | 1373 | { |
92c2555f | 1374 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (fd_port); |
840ae05d JB |
1375 | |
1376 | if (!ptob->seek) | |
1bbd0b84 | 1377 | SCM_MISC_ERROR ("port is not seekable", |
1e6808ea | 1378 | scm_cons (fd_port, SCM_EOL)); |
840ae05d | 1379 | else |
1e6808ea | 1380 | rv = ptob->seek (fd_port, off, how); |
840ae05d JB |
1381 | } |
1382 | else /* file descriptor?. */ | |
1383 | { | |
a55c2b68 | 1384 | rv = lseek (scm_to_int (fd_port), off, how); |
840ae05d | 1385 | if (rv == -1) |
1bbd0b84 | 1386 | SCM_SYSERROR; |
840ae05d | 1387 | } |
a55c2b68 | 1388 | return scm_from_intmax (rv); |
840ae05d | 1389 | } |
1bbd0b84 | 1390 | #undef FUNC_NAME |
840ae05d | 1391 | |
82893676 MG |
1392 | #ifdef __MINGW32__ |
1393 | /* Define this function since it is not supported under Windows. */ | |
1394 | static int truncate (char *file, int length) | |
1395 | { | |
1396 | int ret = -1, fdes; | |
1397 | if ((fdes = open (file, O_BINARY | O_WRONLY)) != -1) | |
1398 | { | |
1399 | ret = chsize (fdes, length); | |
1400 | close (fdes); | |
1401 | } | |
1402 | return ret; | |
1403 | } | |
1404 | #endif /* __MINGW32__ */ | |
1405 | ||
a1ec6916 | 1406 | SCM_DEFINE (scm_truncate_file, "truncate-file", 1, 1, 0, |
1bbd0b84 | 1407 | (SCM object, SCM length), |
1e6808ea MG |
1408 | "Truncates the object referred to by @var{object} to at most\n" |
1409 | "@var{length} bytes. @var{object} can be a string containing a\n" | |
1410 | "file name or an integer file descriptor or a port.\n" | |
1411 | "@var{length} may be omitted if @var{object} is not a file name,\n" | |
7f9994d9 | 1412 | "in which case the truncation occurs at the current port\n" |
1e6808ea | 1413 | "position. The return value is unspecified.") |
1bbd0b84 | 1414 | #define FUNC_NAME s_scm_truncate_file |
840ae05d | 1415 | { |
69bc9ff3 GH |
1416 | int rv; |
1417 | off_t c_length; | |
1418 | ||
1419 | /* object can be a port, fdes or filename. */ | |
840ae05d | 1420 | |
840ae05d JB |
1421 | if (SCM_UNBNDP (length)) |
1422 | { | |
69bc9ff3 | 1423 | /* must supply length if object is a filename. */ |
7f9994d9 | 1424 | if (scm_is_string (object)) |
34d19ef6 | 1425 | SCM_MISC_ERROR("must supply length if OBJECT is a filename", SCM_EOL); |
69bc9ff3 | 1426 | |
e11e83f3 | 1427 | length = scm_seek (object, SCM_INUM0, scm_from_int (SEEK_CUR)); |
840ae05d | 1428 | } |
7f9994d9 | 1429 | c_length = scm_to_size_t (length); |
3fe6190f | 1430 | |
69bc9ff3 | 1431 | object = SCM_COERCE_OUTPORT (object); |
e11e83f3 | 1432 | if (scm_is_integer (object)) |
69bc9ff3 | 1433 | { |
e11e83f3 | 1434 | SCM_SYSCALL (rv = ftruncate (scm_to_int (object), c_length)); |
69bc9ff3 | 1435 | } |
0c95b57d | 1436 | else if (SCM_OPOUTPORTP (object)) |
69bc9ff3 | 1437 | { |
92c2555f MV |
1438 | scm_t_port *pt = SCM_PTAB_ENTRY (object); |
1439 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); | |
69bc9ff3 | 1440 | |
affc96b5 | 1441 | if (!ptob->truncate) |
1bbd0b84 | 1442 | SCM_MISC_ERROR ("port is not truncatable", SCM_EOL); |
69bc9ff3 | 1443 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1444 | scm_end_input (object); |
69bc9ff3 | 1445 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1446 | ptob->flush (object); |
69bc9ff3 | 1447 | |
affc96b5 | 1448 | ptob->truncate (object, c_length); |
69bc9ff3 GH |
1449 | rv = 0; |
1450 | } | |
1451 | else | |
1452 | { | |
7f9994d9 MV |
1453 | char *str = scm_to_locale_string (object); |
1454 | int eno; | |
1455 | SCM_SYSCALL (rv = truncate (str, c_length)); | |
1456 | eno = errno; | |
1457 | free (str); | |
1458 | errno = eno; | |
69bc9ff3 GH |
1459 | } |
1460 | if (rv == -1) | |
1bbd0b84 | 1461 | SCM_SYSERROR; |
840ae05d JB |
1462 | return SCM_UNSPECIFIED; |
1463 | } | |
1bbd0b84 | 1464 | #undef FUNC_NAME |
840ae05d | 1465 | |
a1ec6916 | 1466 | SCM_DEFINE (scm_port_line, "port-line", 1, 0, 0, |
1bbd0b84 | 1467 | (SCM port), |
a150979d KR |
1468 | "Return the current line number for @var{port}.\n" |
1469 | "\n" | |
1470 | "The first line of a file is 0. But you might want to add 1\n" | |
1471 | "when printing line numbers, since starting from 1 is\n" | |
1472 | "traditional in error messages, and likely to be more natural to\n" | |
1473 | "non-programmers.") | |
1bbd0b84 | 1474 | #define FUNC_NAME s_scm_port_line |
0f2d19dd | 1475 | { |
78446828 | 1476 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1477 | SCM_VALIDATE_OPENPORT (1, port); |
e11e83f3 | 1478 | return scm_from_int (SCM_LINUM (port)); |
0f2d19dd | 1479 | } |
1bbd0b84 | 1480 | #undef FUNC_NAME |
0f2d19dd | 1481 | |
a1ec6916 | 1482 | SCM_DEFINE (scm_set_port_line_x, "set-port-line!", 2, 0, 0, |
1bbd0b84 | 1483 | (SCM port, SCM line), |
a150979d KR |
1484 | "Set the current line number for @var{port} to @var{line}. The\n" |
1485 | "first line of a file is 0.") | |
1bbd0b84 | 1486 | #define FUNC_NAME s_scm_set_port_line_x |
d043d8c2 | 1487 | { |
360fc44c | 1488 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1489 | SCM_VALIDATE_OPENPORT (1, port); |
a55c2b68 | 1490 | SCM_PTAB_ENTRY (port)->line_number = scm_to_int (line); |
564478fd | 1491 | return SCM_UNSPECIFIED; |
d043d8c2 | 1492 | } |
1bbd0b84 | 1493 | #undef FUNC_NAME |
d043d8c2 | 1494 | |
a1ec6916 | 1495 | SCM_DEFINE (scm_port_column, "port-column", 1, 0, 0, |
1bbd0b84 | 1496 | (SCM port), |
a150979d KR |
1497 | "Return the current column number of @var{port}.\n" |
1498 | "If the number is\n" | |
b380b885 MD |
1499 | "unknown, the result is #f. Otherwise, the result is a 0-origin integer\n" |
1500 | "- i.e. the first character of the first line is line 0, column 0.\n" | |
1501 | "(However, when you display a file position, for example in an error\n" | |
650a1cf9 | 1502 | "message, we recommend you add 1 to get 1-origin integers. This is\n" |
b380b885 MD |
1503 | "because lines and column numbers traditionally start with 1, and that is\n" |
1504 | "what non-programmers will find most natural.)") | |
1bbd0b84 | 1505 | #define FUNC_NAME s_scm_port_column |
0f2d19dd | 1506 | { |
78446828 | 1507 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1508 | SCM_VALIDATE_OPENPORT (1, port); |
e11e83f3 | 1509 | return scm_from_int (SCM_COL (port)); |
0f2d19dd | 1510 | } |
1bbd0b84 | 1511 | #undef FUNC_NAME |
0f2d19dd | 1512 | |
a1ec6916 | 1513 | SCM_DEFINE (scm_set_port_column_x, "set-port-column!", 2, 0, 0, |
1bbd0b84 | 1514 | (SCM port, SCM column), |
a150979d KR |
1515 | "Set the current column of @var{port}. Before reading the first\n" |
1516 | "character on a line the column should be 0.") | |
1bbd0b84 | 1517 | #define FUNC_NAME s_scm_set_port_column_x |
d043d8c2 | 1518 | { |
360fc44c | 1519 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1520 | SCM_VALIDATE_OPENPORT (1, port); |
a55c2b68 | 1521 | SCM_PTAB_ENTRY (port)->column_number = scm_to_int (column); |
564478fd | 1522 | return SCM_UNSPECIFIED; |
d043d8c2 | 1523 | } |
1bbd0b84 | 1524 | #undef FUNC_NAME |
d043d8c2 | 1525 | |
a1ec6916 | 1526 | SCM_DEFINE (scm_port_filename, "port-filename", 1, 0, 0, |
1bbd0b84 | 1527 | (SCM port), |
b380b885 | 1528 | "Return the filename associated with @var{port}. This function returns\n" |
2a2a730b | 1529 | "the strings \"standard input\", \"standard output\" and \"standard error\"\n" |
a3c8b9fc | 1530 | "when called on the current input, output and error ports respectively.") |
1bbd0b84 | 1531 | #define FUNC_NAME s_scm_port_filename |
0f2d19dd | 1532 | { |
78446828 | 1533 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1534 | SCM_VALIDATE_OPENPORT (1, port); |
b24b5e13 | 1535 | return SCM_FILENAME (port); |
0f2d19dd | 1536 | } |
1bbd0b84 | 1537 | #undef FUNC_NAME |
0f2d19dd | 1538 | |
a1ec6916 | 1539 | SCM_DEFINE (scm_set_port_filename_x, "set-port-filename!", 2, 0, 0, |
1bbd0b84 | 1540 | (SCM port, SCM filename), |
b380b885 MD |
1541 | "Change the filename associated with @var{port}, using the current input\n" |
1542 | "port if none is specified. Note that this does not change the port's\n" | |
1543 | "source of data, but only the value that is returned by\n" | |
1544 | "@code{port-filename} and reported in diagnostic output.") | |
1bbd0b84 | 1545 | #define FUNC_NAME s_scm_set_port_filename_x |
d14af9f2 | 1546 | { |
360fc44c | 1547 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1548 | SCM_VALIDATE_OPENPORT (1, port); |
360fc44c | 1549 | /* We allow the user to set the filename to whatever he likes. */ |
b24b5e13 DH |
1550 | SCM_SET_FILENAME (port, filename); |
1551 | return SCM_UNSPECIFIED; | |
d14af9f2 | 1552 | } |
1bbd0b84 | 1553 | #undef FUNC_NAME |
d14af9f2 | 1554 | |
0f2d19dd JB |
1555 | #ifndef ttyname |
1556 | extern char * ttyname(); | |
1557 | #endif | |
1558 | ||
f12733c9 MD |
1559 | void |
1560 | scm_print_port_mode (SCM exp, SCM port) | |
1561 | { | |
1562 | scm_puts (SCM_CLOSEDP (exp) | |
1563 | ? "closed: " | |
f9a64404 DH |
1564 | : (SCM_RDNG & SCM_CELL_WORD_0 (exp) |
1565 | ? (SCM_WRTNG & SCM_CELL_WORD_0 (exp) | |
f12733c9 MD |
1566 | ? "input-output: " |
1567 | : "input: ") | |
f9a64404 | 1568 | : (SCM_WRTNG & SCM_CELL_WORD_0 (exp) |
f12733c9 MD |
1569 | ? "output: " |
1570 | : "bogus: ")), | |
1571 | port); | |
1572 | } | |
1cc91f1b | 1573 | |
f12733c9 | 1574 | int |
e81d98ec | 1575 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 1576 | { |
f12733c9 MD |
1577 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
1578 | if (!type) | |
1579 | type = "port"; | |
b7f3516f | 1580 | scm_puts ("#<", port); |
f12733c9 | 1581 | scm_print_port_mode (exp, port); |
b7f3516f TT |
1582 | scm_puts (type, port); |
1583 | scm_putc (' ', port); | |
12a8b769 | 1584 | scm_intprint (SCM_CELL_WORD_1 (exp), 16, port); |
b7f3516f | 1585 | scm_putc ('>', port); |
f12733c9 | 1586 | return 1; |
0f2d19dd JB |
1587 | } |
1588 | ||
0f2d19dd JB |
1589 | void |
1590 | scm_ports_prehistory () | |
0f2d19dd JB |
1591 | { |
1592 | scm_numptob = 0; | |
67329a9e | 1593 | scm_ptobs = (scm_t_ptob_descriptor *) scm_malloc (sizeof (scm_t_ptob_descriptor)); |
0f2d19dd | 1594 | } |
0f2d19dd JB |
1595 | |
1596 | \f | |
ee149d03 | 1597 | |
d68fee48 | 1598 | /* Void ports. */ |
0f2d19dd | 1599 | |
92c2555f | 1600 | scm_t_bits scm_tc16_void_port = 0; |
0f2d19dd | 1601 | |
e81d98ec | 1602 | static int fill_input_void_port (SCM port SCM_UNUSED) |
283a1a0e | 1603 | { |
70df8af6 | 1604 | return EOF; |
283a1a0e GH |
1605 | } |
1606 | ||
31703ab8 | 1607 | static void |
e81d98ec DH |
1608 | write_void_port (SCM port SCM_UNUSED, |
1609 | const void *data SCM_UNUSED, | |
1610 | size_t size SCM_UNUSED) | |
31703ab8 GH |
1611 | { |
1612 | } | |
1613 | ||
d617ee18 MV |
1614 | static SCM |
1615 | scm_i_void_port (long mode_bits) | |
0f2d19dd | 1616 | { |
b9ad392e | 1617 | scm_mutex_lock (&scm_i_port_table_mutex); |
402788a9 | 1618 | { |
da220f27 HWN |
1619 | SCM answer = scm_new_port_table_entry (scm_tc16_void_port); |
1620 | scm_t_port * pt = SCM_PTAB_ENTRY(answer); | |
1621 | ||
402788a9 | 1622 | scm_port_non_buffer (pt); |
402788a9 HWN |
1623 | |
1624 | SCM_SETSTREAM (answer, 0); | |
1625 | SCM_SET_CELL_TYPE (answer, scm_tc16_void_port | mode_bits); | |
b9ad392e | 1626 | scm_mutex_unlock (&scm_i_port_table_mutex); |
402788a9 HWN |
1627 | return answer; |
1628 | } | |
0f2d19dd JB |
1629 | } |
1630 | ||
d617ee18 MV |
1631 | SCM |
1632 | scm_void_port (char *mode_str) | |
1633 | { | |
1634 | return scm_i_void_port (scm_mode_bits (mode_str)); | |
1635 | } | |
1636 | ||
a1ec6916 | 1637 | SCM_DEFINE (scm_sys_make_void_port, "%make-void-port", 1, 0, 0, |
1bbd0b84 | 1638 | (SCM mode), |
70df8af6 | 1639 | "Create and return a new void port. A void port acts like\n" |
bb2c02f2 | 1640 | "@file{/dev/null}. The @var{mode} argument\n" |
70df8af6 | 1641 | "specifies the input/output modes for this port: see the\n" |
b380b885 | 1642 | "documentation for @code{open-file} in @ref{File Ports}.") |
1bbd0b84 | 1643 | #define FUNC_NAME s_scm_sys_make_void_port |
0f2d19dd | 1644 | { |
d617ee18 | 1645 | return scm_i_void_port (scm_i_mode_bits (mode)); |
0f2d19dd | 1646 | } |
1bbd0b84 | 1647 | #undef FUNC_NAME |
0f2d19dd | 1648 | |
0f2d19dd | 1649 | \f |
89545eba | 1650 | /* Initialization. */ |
1cc91f1b | 1651 | |
0f2d19dd JB |
1652 | void |
1653 | scm_init_ports () | |
0f2d19dd | 1654 | { |
840ae05d | 1655 | /* lseek() symbols. */ |
e11e83f3 MV |
1656 | scm_c_define ("SEEK_SET", scm_from_int (SEEK_SET)); |
1657 | scm_c_define ("SEEK_CUR", scm_from_int (SEEK_CUR)); | |
1658 | scm_c_define ("SEEK_END", scm_from_int (SEEK_END)); | |
840ae05d | 1659 | |
70df8af6 GH |
1660 | scm_tc16_void_port = scm_make_port_type ("void", fill_input_void_port, |
1661 | write_void_port); | |
a0599745 | 1662 | #include "libguile/ports.x" |
0f2d19dd | 1663 | } |
89e00824 ML |
1664 | |
1665 | /* | |
1666 | Local Variables: | |
1667 | c-file-style: "gnu" | |
1668 | End: | |
1669 | */ |