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); |
c2da2648 | 333 | scm_take_from_input_buffers (port, SCM_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 | { |
93ccaef0 | 590 | return SCM_I_MAKINUM (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); |
93ccaef0 | 643 | return SCM_I_MAKINUM (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 | ||
683 | ||
684 | /* Return the mode flags from an open port. | |
685 | * Some modes such as "append" are only used when opening | |
686 | * a file and are not returned here. */ | |
687 | ||
3b3b36dd | 688 | SCM_DEFINE (scm_port_mode, "port-mode", 1, 0, 0, |
1bbd0b84 | 689 | (SCM port), |
1e6808ea MG |
690 | "Return the port modes associated with the open port @var{port}.\n" |
691 | "These will not necessarily be identical to the modes used when\n" | |
692 | "the port was opened, since modes such as \"append\" which are\n" | |
693 | "used only during port creation are not retained.") | |
1bbd0b84 | 694 | #define FUNC_NAME s_scm_port_mode |
eadd48de | 695 | { |
26a3038d | 696 | char modes[4]; |
eadd48de | 697 | modes[0] = '\0'; |
78446828 MV |
698 | |
699 | port = SCM_COERCE_OUTPORT (port); | |
34d19ef6 | 700 | SCM_VALIDATE_OPPORT (1, port); |
f9a64404 DH |
701 | if (SCM_CELL_WORD_0 (port) & SCM_RDNG) { |
702 | if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) | |
eadd48de GH |
703 | strcpy (modes, "r+"); |
704 | else | |
705 | strcpy (modes, "r"); | |
706 | } | |
f9a64404 | 707 | else if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) |
eadd48de | 708 | strcpy (modes, "w"); |
f9a64404 | 709 | if (SCM_CELL_WORD_0 (port) & SCM_BUF0) |
eadd48de | 710 | strcat (modes, "0"); |
36284627 | 711 | return scm_mem2string (modes, strlen (modes)); |
eadd48de | 712 | } |
1bbd0b84 | 713 | #undef FUNC_NAME |
eadd48de GH |
714 | |
715 | ||
d68fee48 JB |
716 | \f |
717 | /* Closing ports. */ | |
718 | ||
0f2d19dd JB |
719 | /* scm_close_port |
720 | * Call the close operation on a port object. | |
eadd48de | 721 | * see also scm_close. |
0f2d19dd | 722 | */ |
3b3b36dd | 723 | SCM_DEFINE (scm_close_port, "close-port", 1, 0, 0, |
1bbd0b84 | 724 | (SCM port), |
1e6808ea MG |
725 | "Close the specified port object. Return @code{#t} if it\n" |
726 | "successfully closes a port or @code{#f} if it was already\n" | |
727 | "closed. An exception may be raised if an error occurs, for\n" | |
728 | "example when flushing buffered output. See also @ref{Ports and\n" | |
729 | "File Descriptors, close}, for a procedure which can close file\n" | |
730 | "descriptors.") | |
1bbd0b84 | 731 | #define FUNC_NAME s_scm_close_port |
0f2d19dd | 732 | { |
1be6b49c | 733 | size_t i; |
eadd48de GH |
734 | int rv; |
735 | ||
78446828 MV |
736 | port = SCM_COERCE_OUTPORT (port); |
737 | ||
7a754ca6 | 738 | SCM_VALIDATE_PORT (1, port); |
0f2d19dd | 739 | if (SCM_CLOSEDP (port)) |
eadd48de | 740 | return SCM_BOOL_F; |
0f2d19dd | 741 | i = SCM_PTOBNUM (port); |
affc96b5 GH |
742 | if (scm_ptobs[i].close) |
743 | rv = (scm_ptobs[i].close) (port); | |
eadd48de GH |
744 | else |
745 | rv = 0; | |
b9ad392e | 746 | scm_mutex_lock (&scm_i_port_table_mutex); |
0f2d19dd | 747 | scm_remove_from_port_table (port); |
b9ad392e | 748 | scm_mutex_unlock (&scm_i_port_table_mutex); |
22a52da1 | 749 | SCM_CLR_PORT_OPEN_FLAG (port); |
7888309b | 750 | return scm_from_bool (rv >= 0); |
7a754ca6 MD |
751 | } |
752 | #undef FUNC_NAME | |
753 | ||
754 | SCM_DEFINE (scm_close_input_port, "close-input-port", 1, 0, 0, | |
755 | (SCM port), | |
756 | "Close the specified input port object. The routine has no effect if\n" | |
757 | "the file has already been closed. An exception may be raised if an\n" | |
758 | "error occurs. The value returned is unspecified.\n\n" | |
759 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
760 | "which can close file descriptors.") | |
761 | #define FUNC_NAME s_scm_close_input_port | |
762 | { | |
763 | SCM_VALIDATE_INPUT_PORT (1, port); | |
764 | scm_close_port (port); | |
765 | return SCM_UNSPECIFIED; | |
766 | } | |
767 | #undef FUNC_NAME | |
768 | ||
769 | SCM_DEFINE (scm_close_output_port, "close-output-port", 1, 0, 0, | |
770 | (SCM port), | |
771 | "Close the specified output port object. The routine has no effect if\n" | |
772 | "the file has already been closed. An exception may be raised if an\n" | |
773 | "error occurs. The value returned is unspecified.\n\n" | |
774 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
775 | "which can close file descriptors.") | |
776 | #define FUNC_NAME s_scm_close_output_port | |
777 | { | |
778 | port = SCM_COERCE_OUTPORT (port); | |
779 | SCM_VALIDATE_OUTPUT_PORT (1, port); | |
780 | scm_close_port (port); | |
781 | return SCM_UNSPECIFIED; | |
0f2d19dd | 782 | } |
1bbd0b84 | 783 | #undef FUNC_NAME |
0f2d19dd | 784 | |
c536b4b3 MV |
785 | void |
786 | scm_c_port_for_each (void (*proc)(void *data, SCM p), void *data) | |
c2ca4493 | 787 | { |
c014a02e | 788 | long i; |
fdfe6305 MV |
789 | SCM ports; |
790 | ||
fdfe6305 MV |
791 | /* Even without pre-emptive multithreading, running arbitrary code |
792 | while scanning the port table is unsafe because the port table | |
793 | can change arbitrarily (from a GC, for example). So we build a | |
794 | list in advance while blocking the GC. -mvo */ | |
795 | ||
b9ad392e | 796 | scm_mutex_lock (&scm_i_port_table_mutex); |
fdfe6305 MV |
797 | scm_block_gc++; |
798 | ports = SCM_EOL; | |
67329a9e HWN |
799 | for (i = 0; i < scm_i_port_table_size; i++) |
800 | ports = scm_cons (scm_i_port_table[i]->port, ports); | |
fdfe6305 | 801 | scm_block_gc--; |
b9ad392e | 802 | scm_mutex_unlock (&scm_i_port_table_mutex); |
fdfe6305 MV |
803 | |
804 | while (ports != SCM_EOL) | |
c2ca4493 | 805 | { |
c536b4b3 | 806 | proc (data, SCM_CAR (ports)); |
fdfe6305 | 807 | ports = SCM_CDR (ports); |
c2ca4493 | 808 | } |
c536b4b3 | 809 | } |
fdfe6305 | 810 | |
c536b4b3 MV |
811 | SCM_DEFINE (scm_port_for_each, "port-for-each", 1, 0, 0, |
812 | (SCM proc), | |
813 | "Apply @var{proc} to each port in the Guile port table\n" | |
814 | "in turn. The return value is unspecified. More specifically,\n" | |
815 | "@var{proc} is applied exactly once to every port that exists\n" | |
816 | "in the system at the time @var{port-for-each} is invoked.\n" | |
817 | "Changes to the port table while @var{port-for-each} is running\n" | |
818 | "have no effect as far as @var{port-for-each} is concerned.") | |
819 | #define FUNC_NAME s_scm_port_for_each | |
820 | { | |
821 | SCM_VALIDATE_PROC (1, proc); | |
822 | ||
823 | scm_c_port_for_each ((void (*)(void*,SCM))scm_call_1, proc); | |
c2ca4493 GH |
824 | return SCM_UNSPECIFIED; |
825 | } | |
826 | #undef FUNC_NAME | |
827 | ||
c536b4b3 | 828 | |
d68fee48 JB |
829 | \f |
830 | /* Utter miscellany. Gosh, we should clean this up some time. */ | |
831 | ||
3b3b36dd | 832 | SCM_DEFINE (scm_input_port_p, "input-port?", 1, 0, 0, |
1bbd0b84 | 833 | (SCM x), |
1e6808ea MG |
834 | "Return @code{#t} if @var{x} is an input port, otherwise return\n" |
835 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
836 | "@code{port?}.") | |
1bbd0b84 | 837 | #define FUNC_NAME s_scm_input_port_p |
0f2d19dd | 838 | { |
7888309b | 839 | return scm_from_bool (SCM_INPUT_PORT_P (x)); |
0f2d19dd | 840 | } |
1bbd0b84 | 841 | #undef FUNC_NAME |
0f2d19dd | 842 | |
3b3b36dd | 843 | SCM_DEFINE (scm_output_port_p, "output-port?", 1, 0, 0, |
1bbd0b84 | 844 | (SCM x), |
1e6808ea MG |
845 | "Return @code{#t} if @var{x} is an output port, otherwise return\n" |
846 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
847 | "@code{port?}.") | |
1bbd0b84 | 848 | #define FUNC_NAME s_scm_output_port_p |
0f2d19dd | 849 | { |
82893676 | 850 | x = SCM_COERCE_OUTPORT (x); |
7888309b | 851 | return scm_from_bool (SCM_OUTPUT_PORT_P (x)); |
0f2d19dd | 852 | } |
1bbd0b84 | 853 | #undef FUNC_NAME |
0f2d19dd | 854 | |
eb5c0a2a GH |
855 | SCM_DEFINE (scm_port_p, "port?", 1, 0, 0, |
856 | (SCM x), | |
1e6808ea | 857 | "Return a boolean indicating whether @var{x} is a port.\n" |
5352393c MG |
858 | "Equivalent to @code{(or (input-port? @var{x}) (output-port?\n" |
859 | "@var{x}))}.") | |
eb5c0a2a GH |
860 | #define FUNC_NAME s_scm_port_p |
861 | { | |
7888309b | 862 | return scm_from_bool (SCM_PORTP (x)); |
eb5c0a2a GH |
863 | } |
864 | #undef FUNC_NAME | |
865 | ||
3b3b36dd | 866 | SCM_DEFINE (scm_port_closed_p, "port-closed?", 1, 0, 0, |
1bbd0b84 | 867 | (SCM port), |
1e6808ea MG |
868 | "Return @code{#t} if @var{port} is closed or @code{#f} if it is\n" |
869 | "open.") | |
1bbd0b84 | 870 | #define FUNC_NAME s_scm_port_closed_p |
60d0643d | 871 | { |
34d19ef6 | 872 | SCM_VALIDATE_PORT (1, port); |
7888309b | 873 | return scm_from_bool (!SCM_OPPORTP (port)); |
60d0643d | 874 | } |
1bbd0b84 | 875 | #undef FUNC_NAME |
0f2d19dd | 876 | |
3b3b36dd | 877 | SCM_DEFINE (scm_eof_object_p, "eof-object?", 1, 0, 0, |
1bbd0b84 | 878 | (SCM x), |
1e6808ea MG |
879 | "Return @code{#t} if @var{x} is an end-of-file object; otherwise\n" |
880 | "return @code{#f}.") | |
1bbd0b84 | 881 | #define FUNC_NAME s_scm_eof_object_p |
0f2d19dd | 882 | { |
7888309b | 883 | return scm_from_bool(SCM_EOF_OBJECT_P (x)); |
0f2d19dd | 884 | } |
1bbd0b84 | 885 | #undef FUNC_NAME |
0f2d19dd | 886 | |
3b3b36dd | 887 | SCM_DEFINE (scm_force_output, "force-output", 0, 1, 0, |
1bbd0b84 | 888 | (SCM port), |
b380b885 | 889 | "Flush the specified output port, or the current output port if @var{port}\n" |
9401323e | 890 | "is omitted. The current output buffer contents are passed to the\n" |
b380b885 MD |
891 | "underlying port implementation (e.g., in the case of fports, the\n" |
892 | "data will be written to the file and the output buffer will be cleared.)\n" | |
893 | "It has no effect on an unbuffered port.\n\n" | |
894 | "The return value is unspecified.") | |
1bbd0b84 | 895 | #define FUNC_NAME s_scm_force_output |
0f2d19dd JB |
896 | { |
897 | if (SCM_UNBNDP (port)) | |
3e877d15 | 898 | port = scm_cur_outp; |
0f2d19dd | 899 | else |
78446828 MV |
900 | { |
901 | port = SCM_COERCE_OUTPORT (port); | |
34d19ef6 | 902 | SCM_VALIDATE_OPOUTPORT (1, port); |
78446828 | 903 | } |
affc96b5 | 904 | scm_flush (port); |
ee149d03 | 905 | return SCM_UNSPECIFIED; |
0f2d19dd | 906 | } |
1bbd0b84 | 907 | #undef FUNC_NAME |
0f2d19dd | 908 | |
a1ec6916 | 909 | SCM_DEFINE (scm_flush_all_ports, "flush-all-ports", 0, 0, 0, |
1bbd0b84 | 910 | (), |
b380b885 MD |
911 | "Equivalent to calling @code{force-output} on\n" |
912 | "all open output ports. The return value is unspecified.") | |
1bbd0b84 | 913 | #define FUNC_NAME s_scm_flush_all_ports |
89ea5b7c | 914 | { |
1be6b49c | 915 | size_t i; |
89ea5b7c | 916 | |
b9ad392e | 917 | scm_mutex_lock (&scm_i_port_table_mutex); |
67329a9e | 918 | for (i = 0; i < scm_i_port_table_size; i++) |
89ea5b7c | 919 | { |
67329a9e HWN |
920 | if (SCM_OPOUTPORTP (scm_i_port_table[i]->port)) |
921 | scm_flush (scm_i_port_table[i]->port); | |
89ea5b7c | 922 | } |
b9ad392e | 923 | scm_mutex_unlock (&scm_i_port_table_mutex); |
89ea5b7c GH |
924 | return SCM_UNSPECIFIED; |
925 | } | |
1bbd0b84 | 926 | #undef FUNC_NAME |
0f2d19dd | 927 | |
3b3b36dd | 928 | SCM_DEFINE (scm_read_char, "read-char", 0, 1, 0, |
1bbd0b84 | 929 | (SCM port), |
1e6808ea MG |
930 | "Return the next character available from @var{port}, updating\n" |
931 | "@var{port} to point to the following character. If no more\n" | |
932 | "characters are available, the end-of-file object is returned.") | |
1bbd0b84 | 933 | #define FUNC_NAME s_scm_read_char |
0f2d19dd JB |
934 | { |
935 | int c; | |
936 | if (SCM_UNBNDP (port)) | |
334341aa | 937 | port = scm_cur_inp; |
34d19ef6 | 938 | SCM_VALIDATE_OPINPORT (1, port); |
b7f3516f | 939 | c = scm_getc (port); |
0f2d19dd JB |
940 | if (EOF == c) |
941 | return SCM_EOF_VAL; | |
7866a09b | 942 | return SCM_MAKE_CHAR (c); |
0f2d19dd | 943 | } |
1bbd0b84 | 944 | #undef FUNC_NAME |
0f2d19dd | 945 | |
5c070ca7 | 946 | /* this should only be called when the read buffer is empty. it |
affc96b5 | 947 | tries to refill the read buffer. it returns the first char from |
5c070ca7 | 948 | the port, which is either EOF or *(pt->read_pos). */ |
6c951427 | 949 | int |
affc96b5 | 950 | scm_fill_input (SCM port) |
6c951427 | 951 | { |
92c2555f | 952 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e | 953 | |
6c951427 GH |
954 | if (pt->read_buf == pt->putback_buf) |
955 | { | |
956 | /* finished reading put-back chars. */ | |
957 | pt->read_buf = pt->saved_read_buf; | |
958 | pt->read_pos = pt->saved_read_pos; | |
959 | pt->read_end = pt->saved_read_end; | |
960 | pt->read_buf_size = pt->saved_read_buf_size; | |
961 | if (pt->read_pos < pt->read_end) | |
5c070ca7 | 962 | return *(pt->read_pos); |
6c951427 | 963 | } |
affc96b5 | 964 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
6c951427 GH |
965 | } |
966 | ||
ee149d03 | 967 | int |
a284e297 | 968 | scm_getc (SCM port) |
0f2d19dd JB |
969 | { |
970 | int c; | |
92c2555f | 971 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 | 972 | |
840ae05d | 973 | if (pt->rw_active == SCM_PORT_WRITE) |
aab1caad RB |
974 | /* may be marginally faster than calling scm_flush. */ |
975 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
6c951427 | 976 | |
5c070ca7 GH |
977 | if (pt->rw_random) |
978 | pt->rw_active = SCM_PORT_READ; | |
979 | ||
980 | if (pt->read_pos >= pt->read_end) | |
ee149d03 | 981 | { |
affc96b5 | 982 | if (scm_fill_input (port) == EOF) |
5c070ca7 | 983 | return EOF; |
ee149d03 JB |
984 | } |
985 | ||
5c070ca7 | 986 | c = *(pt->read_pos++); |
840ae05d | 987 | |
aab1caad | 988 | switch (c) |
ee149d03 | 989 | { |
aab1caad RB |
990 | case '\n': |
991 | SCM_INCLINE (port); | |
992 | break; | |
993 | case '\t': | |
994 | SCM_TABCOL (port); | |
995 | break; | |
996 | default: | |
997 | SCM_INCCOL (port); | |
998 | break; | |
ee149d03 | 999 | } |
aab1caad | 1000 | |
ee149d03 | 1001 | return c; |
0f2d19dd JB |
1002 | } |
1003 | ||
ee149d03 | 1004 | void |
a284e297 | 1005 | scm_putc (char c, SCM port) |
ee149d03 | 1006 | { |
265e6a4d | 1007 | scm_lfwrite (&c, 1, port); |
ee149d03 | 1008 | } |
3cb988bd | 1009 | |
ee149d03 | 1010 | void |
70d63753 | 1011 | scm_puts (const char *s, SCM port) |
3cb988bd | 1012 | { |
265e6a4d | 1013 | scm_lfwrite (s, strlen (s), port); |
ee149d03 | 1014 | } |
3cb988bd | 1015 | |
6fe692e9 MD |
1016 | /* scm_lfwrite |
1017 | * | |
53802ea8 MV |
1018 | * This function differs from scm_c_write; it updates port line and |
1019 | * column. */ | |
6fe692e9 | 1020 | |
ee149d03 | 1021 | void |
1be6b49c | 1022 | scm_lfwrite (const char *ptr, size_t size, SCM port) |
ee149d03 | 1023 | { |
92c2555f MV |
1024 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1025 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
3e2043c4 | 1026 | |
840ae05d | 1027 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1028 | scm_end_input (port); |
283a1a0e | 1029 | |
31703ab8 | 1030 | ptob->write (port, ptr, size); |
840ae05d | 1031 | |
53802ea8 MV |
1032 | for (; size; ptr++, size--) { |
1033 | if (*ptr == '\n') { | |
1034 | SCM_INCLINE(port); | |
1035 | } | |
1036 | else if (*ptr == '\t') { | |
1037 | SCM_TABCOL(port); | |
1038 | } | |
1039 | else { | |
1040 | SCM_INCCOL(port); | |
1041 | } | |
1042 | } | |
1043 | ||
840ae05d JB |
1044 | if (pt->rw_random) |
1045 | pt->rw_active = SCM_PORT_WRITE; | |
ee149d03 | 1046 | } |
3cb988bd | 1047 | |
6fe692e9 MD |
1048 | /* scm_c_read |
1049 | * | |
1050 | * Used by an application to read arbitrary number of bytes from an | |
1051 | * SCM port. Same semantics as libc read, except that scm_c_read only | |
1052 | * returns less than SIZE bytes if at end-of-file. | |
1053 | * | |
1054 | * Warning: Doesn't update port line and column counts! */ | |
1055 | ||
1be6b49c ML |
1056 | size_t |
1057 | scm_c_read (SCM port, void *buffer, size_t size) | |
6fe692e9 | 1058 | { |
92c2555f | 1059 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1be6b49c | 1060 | size_t n_read = 0, n_available; |
6fe692e9 MD |
1061 | |
1062 | if (pt->rw_active == SCM_PORT_WRITE) | |
1063 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
1064 | ||
1065 | if (pt->rw_random) | |
1066 | pt->rw_active = SCM_PORT_READ; | |
1067 | ||
1068 | if (SCM_READ_BUFFER_EMPTY_P (pt)) | |
1069 | { | |
1070 | if (scm_fill_input (port) == EOF) | |
1071 | return 0; | |
1072 | } | |
1073 | ||
1074 | n_available = pt->read_end - pt->read_pos; | |
1075 | ||
1076 | while (n_available < size) | |
1077 | { | |
1078 | memcpy (buffer, pt->read_pos, n_available); | |
910d1e40 | 1079 | buffer = (char *) buffer + n_available; |
6fe692e9 MD |
1080 | pt->read_pos += n_available; |
1081 | n_read += n_available; | |
1082 | ||
1083 | if (SCM_READ_BUFFER_EMPTY_P (pt)) | |
1084 | { | |
1085 | if (scm_fill_input (port) == EOF) | |
1086 | return n_read; | |
1087 | } | |
1088 | ||
1089 | size -= n_available; | |
1090 | n_available = pt->read_end - pt->read_pos; | |
1091 | } | |
1092 | ||
1093 | memcpy (buffer, pt->read_pos, size); | |
1094 | pt->read_pos += size; | |
1095 | ||
1096 | return n_read + size; | |
1097 | } | |
1098 | ||
1099 | /* scm_c_write | |
1100 | * | |
1101 | * Used by an application to write arbitrary number of bytes to an SCM | |
1102 | * port. Similar semantics as libc write. However, unlike libc | |
1103 | * write, scm_c_write writes the requested number of bytes and has no | |
1104 | * return value. | |
1105 | * | |
1106 | * Warning: Doesn't update port line and column counts! | |
1107 | */ | |
1108 | ||
1109 | void | |
1be6b49c | 1110 | scm_c_write (SCM port, const void *ptr, size_t size) |
6fe692e9 | 1111 | { |
92c2555f MV |
1112 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1113 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
6fe692e9 MD |
1114 | |
1115 | if (pt->rw_active == SCM_PORT_READ) | |
1116 | scm_end_input (port); | |
1117 | ||
1118 | ptob->write (port, ptr, size); | |
1119 | ||
1120 | if (pt->rw_random) | |
1121 | pt->rw_active = SCM_PORT_WRITE; | |
1122 | } | |
3cb988bd | 1123 | |
ee149d03 | 1124 | void |
a284e297 | 1125 | scm_flush (SCM port) |
ee149d03 | 1126 | { |
c014a02e | 1127 | long i = SCM_PTOBNUM (port); |
affc96b5 | 1128 | (scm_ptobs[i].flush) (port); |
ee149d03 JB |
1129 | } |
1130 | ||
283a1a0e | 1131 | void |
a284e297 | 1132 | scm_end_input (SCM port) |
283a1a0e | 1133 | { |
c014a02e | 1134 | long offset; |
92c2555f | 1135 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e GH |
1136 | |
1137 | if (pt->read_buf == pt->putback_buf) | |
1138 | { | |
1139 | offset = pt->read_end - pt->read_pos; | |
1140 | pt->read_buf = pt->saved_read_buf; | |
1141 | pt->read_pos = pt->saved_read_pos; | |
1142 | pt->read_end = pt->saved_read_end; | |
1143 | pt->read_buf_size = pt->saved_read_buf_size; | |
1144 | } | |
1145 | else | |
1146 | offset = 0; | |
1147 | ||
affc96b5 | 1148 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
283a1a0e GH |
1149 | } |
1150 | ||
ee149d03 JB |
1151 | \f |
1152 | ||
1153 | ||
1154 | void | |
a284e297 | 1155 | scm_ungetc (int c, SCM port) |
c6c79933 | 1156 | #define FUNC_NAME "scm_ungetc" |
ee149d03 | 1157 | { |
92c2555f | 1158 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
840ae05d | 1159 | |
6c951427 GH |
1160 | if (pt->read_buf == pt->putback_buf) |
1161 | /* already using the put-back buffer. */ | |
1162 | { | |
1163 | /* enlarge putback_buf if necessary. */ | |
1164 | if (pt->read_end == pt->read_buf + pt->read_buf_size | |
1165 | && pt->read_buf == pt->read_pos) | |
1166 | { | |
1be6b49c | 1167 | size_t new_size = pt->read_buf_size * 2; |
c6c79933 | 1168 | unsigned char *tmp = (unsigned char *) |
4c9419ac MV |
1169 | scm_gc_realloc (pt->putback_buf, pt->read_buf_size, new_size, |
1170 | "putback buffer"); | |
6c951427 | 1171 | |
6c951427 GH |
1172 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; |
1173 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
1174 | pt->read_buf_size = pt->putback_buf_size = new_size; | |
1175 | } | |
1176 | ||
1177 | /* shift any existing bytes to buffer + 1. */ | |
1178 | if (pt->read_pos == pt->read_end) | |
1179 | pt->read_end = pt->read_buf + 1; | |
1180 | else if (pt->read_pos != pt->read_buf + 1) | |
1181 | { | |
1182 | int count = pt->read_end - pt->read_pos; | |
1183 | ||
1184 | memmove (pt->read_buf + 1, pt->read_pos, count); | |
1185 | pt->read_end = pt->read_buf + 1 + count; | |
1186 | } | |
1187 | ||
1188 | pt->read_pos = pt->read_buf; | |
1189 | } | |
1190 | else | |
1191 | /* switch to the put-back buffer. */ | |
1192 | { | |
1193 | if (pt->putback_buf == NULL) | |
1194 | { | |
c357d546 | 1195 | pt->putback_buf |
4c9419ac MV |
1196 | = (unsigned char *) scm_gc_malloc (SCM_INITIAL_PUTBACK_BUF_SIZE, |
1197 | "putback buffer"); | |
6c951427 GH |
1198 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; |
1199 | } | |
1200 | ||
1201 | pt->saved_read_buf = pt->read_buf; | |
1202 | pt->saved_read_pos = pt->read_pos; | |
1203 | pt->saved_read_end = pt->read_end; | |
1204 | pt->saved_read_buf_size = pt->read_buf_size; | |
1205 | ||
1206 | pt->read_pos = pt->read_buf = pt->putback_buf; | |
1207 | pt->read_end = pt->read_buf + 1; | |
1208 | pt->read_buf_size = pt->putback_buf_size; | |
1209 | } | |
1210 | ||
1211 | *pt->read_buf = c; | |
ee149d03 | 1212 | |
840ae05d JB |
1213 | if (pt->rw_random) |
1214 | pt->rw_active = SCM_PORT_READ; | |
1215 | ||
ee149d03 JB |
1216 | if (c == '\n') |
1217 | { | |
1218 | /* What should col be in this case? | |
1219 | * We'll leave it at -1. | |
1220 | */ | |
1221 | SCM_LINUM (port) -= 1; | |
1222 | } | |
1223 | else | |
1224 | SCM_COL(port) -= 1; | |
1225 | } | |
c6c79933 | 1226 | #undef FUNC_NAME |
ee149d03 JB |
1227 | |
1228 | ||
1229 | void | |
70d63753 | 1230 | scm_ungets (const char *s, int n, SCM port) |
ee149d03 JB |
1231 | { |
1232 | /* This is simple minded and inefficient, but unreading strings is | |
1233 | * probably not a common operation, and remember that line and | |
1234 | * column numbers have to be handled... | |
1235 | * | |
1236 | * Please feel free to write an optimized version! | |
1237 | */ | |
1238 | while (n--) | |
1239 | scm_ungetc (s[n], port); | |
1240 | } | |
1241 | ||
1242 | ||
3b3b36dd | 1243 | SCM_DEFINE (scm_peek_char, "peek-char", 0, 1, 0, |
1bbd0b84 | 1244 | (SCM port), |
1e6808ea MG |
1245 | "Return the next character available from @var{port},\n" |
1246 | "@emph{without} updating @var{port} to point to the following\n" | |
1247 | "character. If no more characters are available, the\n" | |
c2dfff19 KR |
1248 | "end-of-file object is returned.\n" |
1249 | "\n" | |
1250 | "The value returned by\n" | |
1e6808ea MG |
1251 | "a call to @code{peek-char} is the same as the value that would\n" |
1252 | "have been returned by a call to @code{read-char} on the same\n" | |
1253 | "port. The only difference is that the very next call to\n" | |
1254 | "@code{read-char} or @code{peek-char} on that @var{port} will\n" | |
1255 | "return the value returned by the preceding call to\n" | |
1256 | "@code{peek-char}. In particular, a call to @code{peek-char} on\n" | |
1257 | "an interactive port will hang waiting for input whenever a call\n" | |
c2dfff19 | 1258 | "to @code{read-char} would have hung.") |
1bbd0b84 | 1259 | #define FUNC_NAME s_scm_peek_char |
ee149d03 | 1260 | { |
1a973c42 | 1261 | int c, column; |
ee149d03 JB |
1262 | if (SCM_UNBNDP (port)) |
1263 | port = scm_cur_inp; | |
1264 | else | |
34d19ef6 | 1265 | SCM_VALIDATE_OPINPORT (1, port); |
1a973c42 | 1266 | column = SCM_COL(port); |
ee149d03 JB |
1267 | c = scm_getc (port); |
1268 | if (EOF == c) | |
1269 | return SCM_EOF_VAL; | |
1270 | scm_ungetc (c, port); | |
1a973c42 | 1271 | SCM_COL(port) = column; |
7866a09b | 1272 | return SCM_MAKE_CHAR (c); |
3cb988bd | 1273 | } |
1bbd0b84 | 1274 | #undef FUNC_NAME |
3cb988bd | 1275 | |
1be4270a | 1276 | SCM_DEFINE (scm_unread_char, "unread-char", 1, 1, 0, |
1bbd0b84 | 1277 | (SCM cobj, SCM port), |
b380b885 MD |
1278 | "Place @var{char} in @var{port} so that it will be read by the\n" |
1279 | "next read operation. If called multiple times, the unread characters\n" | |
1280 | "will be read again in last-in first-out order. If @var{port} is\n" | |
1281 | "not supplied, the current input port is used.") | |
1bbd0b84 | 1282 | #define FUNC_NAME s_scm_unread_char |
0f2d19dd JB |
1283 | { |
1284 | int c; | |
1285 | ||
34d19ef6 | 1286 | SCM_VALIDATE_CHAR (1, cobj); |
0f2d19dd JB |
1287 | if (SCM_UNBNDP (port)) |
1288 | port = scm_cur_inp; | |
1289 | else | |
34d19ef6 | 1290 | SCM_VALIDATE_OPINPORT (2, port); |
0f2d19dd | 1291 | |
7866a09b | 1292 | c = SCM_CHAR (cobj); |
0f2d19dd | 1293 | |
b7f3516f | 1294 | scm_ungetc (c, port); |
0f2d19dd JB |
1295 | return cobj; |
1296 | } | |
1bbd0b84 | 1297 | #undef FUNC_NAME |
0f2d19dd | 1298 | |
a1ec6916 | 1299 | SCM_DEFINE (scm_unread_string, "unread-string", 2, 0, 0, |
1bbd0b84 | 1300 | (SCM str, SCM port), |
b380b885 MD |
1301 | "Place the string @var{str} in @var{port} so that its characters will be\n" |
1302 | "read in subsequent read operations. If called multiple times, the\n" | |
1303 | "unread characters will be read again in last-in first-out order. If\n" | |
1304 | "@var{port} is not supplied, the current-input-port is used.") | |
1bbd0b84 | 1305 | #define FUNC_NAME s_scm_unread_string |
ee1e7e13 | 1306 | { |
34d19ef6 | 1307 | SCM_VALIDATE_STRING (1, str); |
ee1e7e13 MD |
1308 | if (SCM_UNBNDP (port)) |
1309 | port = scm_cur_inp; | |
1310 | else | |
34d19ef6 | 1311 | SCM_VALIDATE_OPINPORT (2, port); |
ee1e7e13 | 1312 | |
34f0f2b8 | 1313 | scm_ungets (SCM_STRING_CHARS (str), SCM_STRING_LENGTH (str), port); |
ee1e7e13 MD |
1314 | |
1315 | return str; | |
1316 | } | |
1bbd0b84 | 1317 | #undef FUNC_NAME |
ee1e7e13 | 1318 | |
a1ec6916 | 1319 | SCM_DEFINE (scm_seek, "seek", 3, 0, 0, |
1e6808ea MG |
1320 | (SCM fd_port, SCM offset, SCM whence), |
1321 | "Sets the current position of @var{fd/port} to the integer\n" | |
1322 | "@var{offset}, which is interpreted according to the value of\n" | |
1323 | "@var{whence}.\n" | |
1324 | "\n" | |
1325 | "One of the following variables should be supplied for\n" | |
1326 | "@var{whence}:\n" | |
b380b885 MD |
1327 | "@defvar SEEK_SET\n" |
1328 | "Seek from the beginning of the file.\n" | |
1329 | "@end defvar\n" | |
1330 | "@defvar SEEK_CUR\n" | |
1331 | "Seek from the current position.\n" | |
1332 | "@end defvar\n" | |
1333 | "@defvar SEEK_END\n" | |
1334 | "Seek from the end of the file.\n" | |
1e6808ea MG |
1335 | "@end defvar\n" |
1336 | "If @var{fd/port} is a file descriptor, the underlying system\n" | |
1337 | "call is @code{lseek}. @var{port} may be a string port.\n" | |
1338 | "\n" | |
1339 | "The value returned is the new position in the file. This means\n" | |
1340 | "that the current position of a port can be obtained using:\n" | |
1341 | "@lisp\n" | |
b380b885 | 1342 | "(seek port 0 SEEK_CUR)\n" |
1e6808ea | 1343 | "@end lisp") |
1bbd0b84 | 1344 | #define FUNC_NAME s_scm_seek |
840ae05d JB |
1345 | { |
1346 | off_t off; | |
1347 | off_t rv; | |
1348 | int how; | |
1349 | ||
1e6808ea | 1350 | fd_port = SCM_COERCE_OUTPORT (fd_port); |
840ae05d | 1351 | |
a55c2b68 MV |
1352 | if (sizeof (off_t) == sizeof (scm_t_intmax)) |
1353 | off = scm_to_intmax (offset); | |
1354 | else | |
1355 | off = scm_to_long (offset); | |
1356 | how = scm_to_int (whence); | |
1357 | ||
840ae05d | 1358 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) |
1bbd0b84 | 1359 | SCM_OUT_OF_RANGE (3, whence); |
1e6808ea | 1360 | if (SCM_OPPORTP (fd_port)) |
840ae05d | 1361 | { |
92c2555f | 1362 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (fd_port); |
840ae05d JB |
1363 | |
1364 | if (!ptob->seek) | |
1bbd0b84 | 1365 | SCM_MISC_ERROR ("port is not seekable", |
1e6808ea | 1366 | scm_cons (fd_port, SCM_EOL)); |
840ae05d | 1367 | else |
1e6808ea | 1368 | rv = ptob->seek (fd_port, off, how); |
840ae05d JB |
1369 | } |
1370 | else /* file descriptor?. */ | |
1371 | { | |
a55c2b68 | 1372 | rv = lseek (scm_to_int (fd_port), off, how); |
840ae05d | 1373 | if (rv == -1) |
1bbd0b84 | 1374 | SCM_SYSERROR; |
840ae05d | 1375 | } |
a55c2b68 | 1376 | return scm_from_intmax (rv); |
840ae05d | 1377 | } |
1bbd0b84 | 1378 | #undef FUNC_NAME |
840ae05d | 1379 | |
82893676 MG |
1380 | #ifdef __MINGW32__ |
1381 | /* Define this function since it is not supported under Windows. */ | |
1382 | static int truncate (char *file, int length) | |
1383 | { | |
1384 | int ret = -1, fdes; | |
1385 | if ((fdes = open (file, O_BINARY | O_WRONLY)) != -1) | |
1386 | { | |
1387 | ret = chsize (fdes, length); | |
1388 | close (fdes); | |
1389 | } | |
1390 | return ret; | |
1391 | } | |
1392 | #endif /* __MINGW32__ */ | |
1393 | ||
a1ec6916 | 1394 | SCM_DEFINE (scm_truncate_file, "truncate-file", 1, 1, 0, |
1bbd0b84 | 1395 | (SCM object, SCM length), |
1e6808ea MG |
1396 | "Truncates the object referred to by @var{object} to at most\n" |
1397 | "@var{length} bytes. @var{object} can be a string containing a\n" | |
1398 | "file name or an integer file descriptor or a port.\n" | |
1399 | "@var{length} may be omitted if @var{object} is not a file name,\n" | |
1400 | "in which case the truncation occurs at the current port.\n" | |
1401 | "position. The return value is unspecified.") | |
1bbd0b84 | 1402 | #define FUNC_NAME s_scm_truncate_file |
840ae05d | 1403 | { |
69bc9ff3 GH |
1404 | int rv; |
1405 | off_t c_length; | |
1406 | ||
1407 | /* object can be a port, fdes or filename. */ | |
840ae05d | 1408 | |
840ae05d JB |
1409 | if (SCM_UNBNDP (length)) |
1410 | { | |
69bc9ff3 | 1411 | /* must supply length if object is a filename. */ |
a6d9e5ab | 1412 | if (SCM_STRINGP (object)) |
34d19ef6 | 1413 | SCM_MISC_ERROR("must supply length if OBJECT is a filename", SCM_EOL); |
69bc9ff3 | 1414 | |
93ccaef0 | 1415 | length = scm_seek (object, SCM_INUM0, SCM_I_MAKINUM (SEEK_CUR)); |
840ae05d | 1416 | } |
34d19ef6 | 1417 | c_length = SCM_NUM2LONG (2, length); |
69bc9ff3 | 1418 | if (c_length < 0) |
1bbd0b84 | 1419 | SCM_MISC_ERROR ("negative offset", SCM_EOL); |
3fe6190f | 1420 | |
69bc9ff3 GH |
1421 | object = SCM_COERCE_OUTPORT (object); |
1422 | if (SCM_INUMP (object)) | |
1423 | { | |
1424 | SCM_SYSCALL (rv = ftruncate (SCM_INUM (object), c_length)); | |
1425 | } | |
0c95b57d | 1426 | else if (SCM_OPOUTPORTP (object)) |
69bc9ff3 | 1427 | { |
92c2555f MV |
1428 | scm_t_port *pt = SCM_PTAB_ENTRY (object); |
1429 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); | |
69bc9ff3 | 1430 | |
affc96b5 | 1431 | if (!ptob->truncate) |
1bbd0b84 | 1432 | SCM_MISC_ERROR ("port is not truncatable", SCM_EOL); |
69bc9ff3 | 1433 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1434 | scm_end_input (object); |
69bc9ff3 | 1435 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1436 | ptob->flush (object); |
69bc9ff3 | 1437 | |
affc96b5 | 1438 | ptob->truncate (object, c_length); |
69bc9ff3 GH |
1439 | rv = 0; |
1440 | } | |
1441 | else | |
1442 | { | |
a6d9e5ab | 1443 | SCM_VALIDATE_STRING (1, object); |
a6d9e5ab | 1444 | SCM_SYSCALL (rv = truncate (SCM_STRING_CHARS (object), c_length)); |
69bc9ff3 GH |
1445 | } |
1446 | if (rv == -1) | |
1bbd0b84 | 1447 | SCM_SYSERROR; |
840ae05d JB |
1448 | return SCM_UNSPECIFIED; |
1449 | } | |
1bbd0b84 | 1450 | #undef FUNC_NAME |
840ae05d | 1451 | |
a1ec6916 | 1452 | SCM_DEFINE (scm_port_line, "port-line", 1, 0, 0, |
1bbd0b84 | 1453 | (SCM port), |
a150979d KR |
1454 | "Return the current line number for @var{port}.\n" |
1455 | "\n" | |
1456 | "The first line of a file is 0. But you might want to add 1\n" | |
1457 | "when printing line numbers, since starting from 1 is\n" | |
1458 | "traditional in error messages, and likely to be more natural to\n" | |
1459 | "non-programmers.") | |
1bbd0b84 | 1460 | #define FUNC_NAME s_scm_port_line |
0f2d19dd | 1461 | { |
78446828 | 1462 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1463 | SCM_VALIDATE_OPENPORT (1, port); |
93ccaef0 | 1464 | return SCM_I_MAKINUM (SCM_LINUM (port)); |
0f2d19dd | 1465 | } |
1bbd0b84 | 1466 | #undef FUNC_NAME |
0f2d19dd | 1467 | |
a1ec6916 | 1468 | SCM_DEFINE (scm_set_port_line_x, "set-port-line!", 2, 0, 0, |
1bbd0b84 | 1469 | (SCM port, SCM line), |
a150979d KR |
1470 | "Set the current line number for @var{port} to @var{line}. The\n" |
1471 | "first line of a file is 0.") | |
1bbd0b84 | 1472 | #define FUNC_NAME s_scm_set_port_line_x |
d043d8c2 | 1473 | { |
360fc44c | 1474 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1475 | SCM_VALIDATE_OPENPORT (1, port); |
a55c2b68 | 1476 | SCM_PTAB_ENTRY (port)->line_number = scm_to_int (line); |
564478fd | 1477 | return SCM_UNSPECIFIED; |
d043d8c2 | 1478 | } |
1bbd0b84 | 1479 | #undef FUNC_NAME |
d043d8c2 | 1480 | |
a1ec6916 | 1481 | SCM_DEFINE (scm_port_column, "port-column", 1, 0, 0, |
1bbd0b84 | 1482 | (SCM port), |
a150979d KR |
1483 | "Return the current column number of @var{port}.\n" |
1484 | "If the number is\n" | |
b380b885 MD |
1485 | "unknown, the result is #f. Otherwise, the result is a 0-origin integer\n" |
1486 | "- i.e. the first character of the first line is line 0, column 0.\n" | |
1487 | "(However, when you display a file position, for example in an error\n" | |
650a1cf9 | 1488 | "message, we recommend you add 1 to get 1-origin integers. This is\n" |
b380b885 MD |
1489 | "because lines and column numbers traditionally start with 1, and that is\n" |
1490 | "what non-programmers will find most natural.)") | |
1bbd0b84 | 1491 | #define FUNC_NAME s_scm_port_column |
0f2d19dd | 1492 | { |
78446828 | 1493 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1494 | SCM_VALIDATE_OPENPORT (1, port); |
93ccaef0 | 1495 | return SCM_I_MAKINUM (SCM_COL (port)); |
0f2d19dd | 1496 | } |
1bbd0b84 | 1497 | #undef FUNC_NAME |
0f2d19dd | 1498 | |
a1ec6916 | 1499 | SCM_DEFINE (scm_set_port_column_x, "set-port-column!", 2, 0, 0, |
1bbd0b84 | 1500 | (SCM port, SCM column), |
a150979d KR |
1501 | "Set the current column of @var{port}. Before reading the first\n" |
1502 | "character on a line the column should be 0.") | |
1bbd0b84 | 1503 | #define FUNC_NAME s_scm_set_port_column_x |
d043d8c2 | 1504 | { |
360fc44c | 1505 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1506 | SCM_VALIDATE_OPENPORT (1, port); |
a55c2b68 | 1507 | SCM_PTAB_ENTRY (port)->column_number = scm_to_int (column); |
564478fd | 1508 | return SCM_UNSPECIFIED; |
d043d8c2 | 1509 | } |
1bbd0b84 | 1510 | #undef FUNC_NAME |
d043d8c2 | 1511 | |
a1ec6916 | 1512 | SCM_DEFINE (scm_port_filename, "port-filename", 1, 0, 0, |
1bbd0b84 | 1513 | (SCM port), |
b380b885 | 1514 | "Return the filename associated with @var{port}. This function returns\n" |
2a2a730b | 1515 | "the strings \"standard input\", \"standard output\" and \"standard error\"\n" |
a3c8b9fc | 1516 | "when called on the current input, output and error ports respectively.") |
1bbd0b84 | 1517 | #define FUNC_NAME s_scm_port_filename |
0f2d19dd | 1518 | { |
78446828 | 1519 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1520 | SCM_VALIDATE_OPENPORT (1, port); |
b24b5e13 | 1521 | return SCM_FILENAME (port); |
0f2d19dd | 1522 | } |
1bbd0b84 | 1523 | #undef FUNC_NAME |
0f2d19dd | 1524 | |
a1ec6916 | 1525 | SCM_DEFINE (scm_set_port_filename_x, "set-port-filename!", 2, 0, 0, |
1bbd0b84 | 1526 | (SCM port, SCM filename), |
b380b885 MD |
1527 | "Change the filename associated with @var{port}, using the current input\n" |
1528 | "port if none is specified. Note that this does not change the port's\n" | |
1529 | "source of data, but only the value that is returned by\n" | |
1530 | "@code{port-filename} and reported in diagnostic output.") | |
1bbd0b84 | 1531 | #define FUNC_NAME s_scm_set_port_filename_x |
d14af9f2 | 1532 | { |
360fc44c | 1533 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1534 | SCM_VALIDATE_OPENPORT (1, port); |
360fc44c | 1535 | /* We allow the user to set the filename to whatever he likes. */ |
b24b5e13 DH |
1536 | SCM_SET_FILENAME (port, filename); |
1537 | return SCM_UNSPECIFIED; | |
d14af9f2 | 1538 | } |
1bbd0b84 | 1539 | #undef FUNC_NAME |
d14af9f2 | 1540 | |
0f2d19dd JB |
1541 | #ifndef ttyname |
1542 | extern char * ttyname(); | |
1543 | #endif | |
1544 | ||
f12733c9 MD |
1545 | void |
1546 | scm_print_port_mode (SCM exp, SCM port) | |
1547 | { | |
1548 | scm_puts (SCM_CLOSEDP (exp) | |
1549 | ? "closed: " | |
f9a64404 DH |
1550 | : (SCM_RDNG & SCM_CELL_WORD_0 (exp) |
1551 | ? (SCM_WRTNG & SCM_CELL_WORD_0 (exp) | |
f12733c9 MD |
1552 | ? "input-output: " |
1553 | : "input: ") | |
f9a64404 | 1554 | : (SCM_WRTNG & SCM_CELL_WORD_0 (exp) |
f12733c9 MD |
1555 | ? "output: " |
1556 | : "bogus: ")), | |
1557 | port); | |
1558 | } | |
1cc91f1b | 1559 | |
f12733c9 | 1560 | int |
e81d98ec | 1561 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 1562 | { |
f12733c9 MD |
1563 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
1564 | if (!type) | |
1565 | type = "port"; | |
b7f3516f | 1566 | scm_puts ("#<", port); |
f12733c9 | 1567 | scm_print_port_mode (exp, port); |
b7f3516f TT |
1568 | scm_puts (type, port); |
1569 | scm_putc (' ', port); | |
12a8b769 | 1570 | scm_intprint (SCM_CELL_WORD_1 (exp), 16, port); |
b7f3516f | 1571 | scm_putc ('>', port); |
f12733c9 | 1572 | return 1; |
0f2d19dd JB |
1573 | } |
1574 | ||
0f2d19dd JB |
1575 | void |
1576 | scm_ports_prehistory () | |
0f2d19dd JB |
1577 | { |
1578 | scm_numptob = 0; | |
67329a9e | 1579 | scm_ptobs = (scm_t_ptob_descriptor *) scm_malloc (sizeof (scm_t_ptob_descriptor)); |
0f2d19dd | 1580 | } |
0f2d19dd JB |
1581 | |
1582 | \f | |
ee149d03 | 1583 | |
d68fee48 | 1584 | /* Void ports. */ |
0f2d19dd | 1585 | |
92c2555f | 1586 | scm_t_bits scm_tc16_void_port = 0; |
0f2d19dd | 1587 | |
e81d98ec | 1588 | static int fill_input_void_port (SCM port SCM_UNUSED) |
283a1a0e | 1589 | { |
70df8af6 | 1590 | return EOF; |
283a1a0e GH |
1591 | } |
1592 | ||
31703ab8 | 1593 | static void |
e81d98ec DH |
1594 | write_void_port (SCM port SCM_UNUSED, |
1595 | const void *data SCM_UNUSED, | |
1596 | size_t size SCM_UNUSED) | |
31703ab8 GH |
1597 | { |
1598 | } | |
1599 | ||
0f2d19dd | 1600 | SCM |
a284e297 | 1601 | scm_void_port (char *mode_str) |
0f2d19dd | 1602 | { |
b9ad392e | 1603 | scm_mutex_lock (&scm_i_port_table_mutex); |
402788a9 HWN |
1604 | { |
1605 | int mode_bits = scm_mode_bits (mode_str); | |
da220f27 HWN |
1606 | SCM answer = scm_new_port_table_entry (scm_tc16_void_port); |
1607 | scm_t_port * pt = SCM_PTAB_ENTRY(answer); | |
1608 | ||
402788a9 | 1609 | scm_port_non_buffer (pt); |
402788a9 HWN |
1610 | |
1611 | SCM_SETSTREAM (answer, 0); | |
1612 | SCM_SET_CELL_TYPE (answer, scm_tc16_void_port | mode_bits); | |
b9ad392e | 1613 | scm_mutex_unlock (&scm_i_port_table_mutex); |
402788a9 HWN |
1614 | return answer; |
1615 | } | |
0f2d19dd JB |
1616 | } |
1617 | ||
a1ec6916 | 1618 | SCM_DEFINE (scm_sys_make_void_port, "%make-void-port", 1, 0, 0, |
1bbd0b84 | 1619 | (SCM mode), |
70df8af6 | 1620 | "Create and return a new void port. A void port acts like\n" |
bb2c02f2 | 1621 | "@file{/dev/null}. The @var{mode} argument\n" |
70df8af6 | 1622 | "specifies the input/output modes for this port: see the\n" |
b380b885 | 1623 | "documentation for @code{open-file} in @ref{File Ports}.") |
1bbd0b84 | 1624 | #define FUNC_NAME s_scm_sys_make_void_port |
0f2d19dd | 1625 | { |
a6d9e5ab | 1626 | SCM_VALIDATE_STRING (1, mode); |
a6d9e5ab | 1627 | return scm_void_port (SCM_STRING_CHARS (mode)); |
0f2d19dd | 1628 | } |
1bbd0b84 | 1629 | #undef FUNC_NAME |
0f2d19dd | 1630 | |
0f2d19dd | 1631 | \f |
89545eba | 1632 | /* Initialization. */ |
1cc91f1b | 1633 | |
0f2d19dd JB |
1634 | void |
1635 | scm_init_ports () | |
0f2d19dd | 1636 | { |
840ae05d | 1637 | /* lseek() symbols. */ |
93ccaef0 MV |
1638 | scm_c_define ("SEEK_SET", SCM_I_MAKINUM (SEEK_SET)); |
1639 | scm_c_define ("SEEK_CUR", SCM_I_MAKINUM (SEEK_CUR)); | |
1640 | scm_c_define ("SEEK_END", SCM_I_MAKINUM (SEEK_END)); | |
840ae05d | 1641 | |
70df8af6 GH |
1642 | scm_tc16_void_port = scm_make_port_type ("void", fill_input_void_port, |
1643 | write_void_port); | |
a0599745 | 1644 | #include "libguile/ports.x" |
0f2d19dd | 1645 | } |
89e00824 ML |
1646 | |
1647 | /* | |
1648 | Local Variables: | |
1649 | c-file-style: "gnu" | |
1650 | End: | |
1651 | */ |