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be54b15d | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
0f2d19dd | 45 | \f |
d68fee48 JB |
46 | /* Headers. */ |
47 | ||
0f2d19dd | 48 | #include <stdio.h> |
e6e2e95a MD |
49 | #include <errno.h> |
50 | ||
a0599745 | 51 | #include "libguile/_scm.h" |
f0942910 | 52 | #include "libguile/eval.h" |
a0599745 MD |
53 | #include "libguile/objects.h" |
54 | #include "libguile/smob.h" | |
55 | #include "libguile/chars.h" | |
0f2d19dd | 56 | |
a0599745 MD |
57 | #include "libguile/keywords.h" |
58 | #include "libguile/root.h" | |
59 | #include "libguile/strings.h" | |
20e6290e | 60 | |
a0599745 MD |
61 | #include "libguile/validate.h" |
62 | #include "libguile/ports.h" | |
0f2d19dd | 63 | |
bd9e24b3 GH |
64 | #ifdef HAVE_STRING_H |
65 | #include <string.h> | |
66 | #endif | |
67 | ||
0f2d19dd | 68 | #ifdef HAVE_MALLOC_H |
95b88819 | 69 | #include <malloc.h> |
0f2d19dd JB |
70 | #endif |
71 | ||
72 | #ifdef HAVE_UNISTD_H | |
73 | #include <unistd.h> | |
74 | #endif | |
75 | ||
95b88819 GH |
76 | #ifdef HAVE_SYS_IOCTL_H |
77 | #include <sys/ioctl.h> | |
78 | #endif | |
d68fee48 | 79 | |
82893676 MG |
80 | #ifdef __MINGW32__ |
81 | #include <fcntl.h> | |
82 | #define ftruncate(fd, size) chsize (fd, size) | |
83 | #endif | |
84 | ||
0f2d19dd | 85 | \f |
d68fee48 | 86 | /* The port kind table --- a dynamically resized array of port types. */ |
0f2d19dd JB |
87 | |
88 | ||
89 | /* scm_ptobs scm_numptob | |
90 | * implement a dynamicly resized array of ptob records. | |
91 | * Indexes into this table are used when generating type | |
92 | * tags for smobjects (if you know a tag you can get an index and conversely). | |
93 | */ | |
92c2555f | 94 | scm_t_ptob_descriptor *scm_ptobs; |
c014a02e | 95 | long scm_numptob; |
0f2d19dd | 96 | |
ee149d03 | 97 | /* GC marker for a port with stream of SCM type. */ |
0f2d19dd | 98 | SCM |
a284e297 | 99 | scm_markstream (SCM ptr) |
0f2d19dd JB |
100 | { |
101 | int openp; | |
f9a64404 | 102 | openp = SCM_CELL_WORD_0 (ptr) & SCM_OPN; |
0f2d19dd | 103 | if (openp) |
74a16888 | 104 | return SCM_PACK (SCM_STREAM (ptr)); |
0f2d19dd JB |
105 | else |
106 | return SCM_BOOL_F; | |
107 | } | |
108 | ||
f12733c9 | 109 | /* |
f12733c9 | 110 | * We choose to use an interface similar to the smob interface with |
affc96b5 | 111 | * fill_input and write as standard fields, passed to the port |
f12733c9 MD |
112 | * type constructor, and optional fields set by setters. |
113 | */ | |
114 | ||
70df8af6 | 115 | static void |
e81d98ec | 116 | flush_port_default (SCM port SCM_UNUSED) |
70df8af6 GH |
117 | { |
118 | } | |
119 | ||
120 | static void | |
e81d98ec | 121 | end_input_default (SCM port SCM_UNUSED, int offset SCM_UNUSED) |
70df8af6 GH |
122 | { |
123 | } | |
0f2d19dd | 124 | |
92c2555f | 125 | scm_t_bits |
f12733c9 | 126 | scm_make_port_type (char *name, |
affc96b5 | 127 | int (*fill_input) (SCM port), |
8aa011a1 | 128 | void (*write) (SCM port, const void *data, size_t size)) |
0f2d19dd JB |
129 | { |
130 | char *tmp; | |
131 | if (255 <= scm_numptob) | |
132 | goto ptoberr; | |
f12733c9 MD |
133 | SCM_DEFER_INTS; |
134 | SCM_SYSCALL (tmp = (char *) realloc ((char *) scm_ptobs, | |
135 | (1 + scm_numptob) | |
92c2555f | 136 | * sizeof (scm_t_ptob_descriptor))); |
0f2d19dd JB |
137 | if (tmp) |
138 | { | |
92c2555f | 139 | scm_ptobs = (scm_t_ptob_descriptor *) tmp; |
affc96b5 | 140 | |
f12733c9 MD |
141 | scm_ptobs[scm_numptob].name = name; |
142 | scm_ptobs[scm_numptob].mark = 0; | |
143 | scm_ptobs[scm_numptob].free = scm_free0; | |
144 | scm_ptobs[scm_numptob].print = scm_port_print; | |
145 | scm_ptobs[scm_numptob].equalp = 0; | |
affc96b5 GH |
146 | scm_ptobs[scm_numptob].close = 0; |
147 | ||
148 | scm_ptobs[scm_numptob].write = write; | |
70df8af6 | 149 | scm_ptobs[scm_numptob].flush = flush_port_default; |
affc96b5 | 150 | |
70df8af6 | 151 | scm_ptobs[scm_numptob].end_input = end_input_default; |
affc96b5 GH |
152 | scm_ptobs[scm_numptob].fill_input = fill_input; |
153 | scm_ptobs[scm_numptob].input_waiting = 0; | |
154 | ||
f12733c9 | 155 | scm_ptobs[scm_numptob].seek = 0; |
affc96b5 GH |
156 | scm_ptobs[scm_numptob].truncate = 0; |
157 | ||
0f2d19dd JB |
158 | scm_numptob++; |
159 | } | |
f12733c9 | 160 | SCM_ALLOW_INTS; |
0f2d19dd | 161 | if (!tmp) |
2500356c DH |
162 | { |
163 | ptoberr: | |
164 | scm_memory_error ("scm_make_port_type"); | |
165 | } | |
f12733c9 MD |
166 | /* Make a class object if Goops is present */ |
167 | if (scm_port_class) | |
168 | scm_make_port_classes (scm_numptob - 1, SCM_PTOBNAME (scm_numptob - 1)); | |
0f2d19dd JB |
169 | return scm_tc7_port + (scm_numptob - 1) * 256; |
170 | } | |
171 | ||
f12733c9 | 172 | void |
6c747373 | 173 | scm_set_port_mark (long tc, SCM (*mark) (SCM)) |
f12733c9 MD |
174 | { |
175 | scm_ptobs[SCM_TC2PTOBNUM (tc)].mark = mark; | |
176 | } | |
177 | ||
178 | void | |
1be6b49c | 179 | scm_set_port_free (long tc, size_t (*free) (SCM)) |
f12733c9 MD |
180 | { |
181 | scm_ptobs[SCM_TC2PTOBNUM (tc)].free = free; | |
182 | } | |
183 | ||
184 | void | |
6c747373 | 185 | scm_set_port_print (long tc, int (*print) (SCM exp, SCM port, |
f12733c9 MD |
186 | scm_print_state *pstate)) |
187 | { | |
188 | scm_ptobs[SCM_TC2PTOBNUM (tc)].print = print; | |
189 | } | |
190 | ||
191 | void | |
6c747373 | 192 | scm_set_port_equalp (long tc, SCM (*equalp) (SCM, SCM)) |
f12733c9 MD |
193 | { |
194 | scm_ptobs[SCM_TC2PTOBNUM (tc)].equalp = equalp; | |
195 | } | |
196 | ||
31703ab8 | 197 | void |
affc96b5 | 198 | scm_set_port_flush (long tc, void (*flush) (SCM port)) |
31703ab8 | 199 | { |
affc96b5 | 200 | scm_ptobs[SCM_TC2PTOBNUM (tc)].flush = flush; |
31703ab8 GH |
201 | } |
202 | ||
f12733c9 | 203 | void |
affc96b5 | 204 | scm_set_port_end_input (long tc, void (*end_input) (SCM port, int offset)) |
f12733c9 | 205 | { |
affc96b5 | 206 | scm_ptobs[SCM_TC2PTOBNUM (tc)].end_input = end_input; |
f12733c9 MD |
207 | } |
208 | ||
209 | void | |
6c747373 | 210 | scm_set_port_close (long tc, int (*close) (SCM)) |
f12733c9 | 211 | { |
affc96b5 | 212 | scm_ptobs[SCM_TC2PTOBNUM (tc)].close = close; |
f12733c9 MD |
213 | } |
214 | ||
215 | void | |
6c747373 | 216 | scm_set_port_seek (long tc, off_t (*seek) (SCM port, |
f12733c9 MD |
217 | off_t OFFSET, |
218 | int WHENCE)) | |
219 | { | |
220 | scm_ptobs[SCM_TC2PTOBNUM (tc)].seek = seek; | |
221 | } | |
222 | ||
223 | void | |
6c747373 | 224 | scm_set_port_truncate (long tc, void (*truncate) (SCM port, off_t length)) |
f12733c9 | 225 | { |
affc96b5 | 226 | scm_ptobs[SCM_TC2PTOBNUM (tc)].truncate = truncate; |
f12733c9 MD |
227 | } |
228 | ||
229 | void | |
affc96b5 | 230 | scm_set_port_input_waiting (long tc, int (*input_waiting) (SCM)) |
f12733c9 | 231 | { |
affc96b5 | 232 | scm_ptobs[SCM_TC2PTOBNUM (tc)].input_waiting = input_waiting; |
f12733c9 MD |
233 | } |
234 | ||
0f2d19dd | 235 | \f |
0f2d19dd | 236 | |
3b3b36dd | 237 | SCM_DEFINE (scm_char_ready_p, "char-ready?", 0, 1, 0, |
1e6808ea MG |
238 | (SCM port), |
239 | "Return @code{#t} if a character is ready on input @var{port}\n" | |
240 | "and return @code{#f} otherwise. If @code{char-ready?} returns\n" | |
241 | "@code{#t} then the next @code{read-char} operation on\n" | |
242 | "@var{port} is guaranteed not to hang. If @var{port} is a file\n" | |
243 | "port at end of file then @code{char-ready?} returns @code{#t}.\n" | |
244 | "@footnote{@code{char-ready?} exists to make it possible for a\n" | |
245 | "program to accept characters from interactive ports without\n" | |
246 | "getting stuck waiting for input. Any input editors associated\n" | |
247 | "with such ports must make sure that characters whose existence\n" | |
248 | "has been asserted by @code{char-ready?} cannot be rubbed out.\n" | |
249 | "If @code{char-ready?} were to return @code{#f} at end of file,\n" | |
250 | "a port at end of file would be indistinguishable from an\n" | |
251 | "interactive port that has no ready characters.}") | |
1bbd0b84 | 252 | #define FUNC_NAME s_scm_char_ready_p |
0f2d19dd | 253 | { |
92c2555f | 254 | scm_t_port *pt; |
6c951427 | 255 | |
0f2d19dd JB |
256 | if (SCM_UNBNDP (port)) |
257 | port = scm_cur_inp; | |
258 | else | |
3b3b36dd | 259 | SCM_VALIDATE_OPINPORT (1,port); |
d68fee48 | 260 | |
ae4c4016 JB |
261 | pt = SCM_PTAB_ENTRY (port); |
262 | ||
6c951427 GH |
263 | /* if the current read buffer is filled, or the |
264 | last pushed-back char has been read and the saved buffer is | |
265 | filled, result is true. */ | |
266 | if (pt->read_pos < pt->read_end | |
267 | || (pt->read_buf == pt->putback_buf | |
268 | && pt->saved_read_pos < pt->saved_read_end)) | |
0f2d19dd | 269 | return SCM_BOOL_T; |
ee149d03 JB |
270 | else |
271 | { | |
92c2555f | 272 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
ee149d03 | 273 | |
affc96b5 | 274 | if (ptob->input_waiting) |
1bbd0b84 | 275 | return SCM_BOOL(ptob->input_waiting (port)); |
ee149d03 | 276 | else |
6c951427 | 277 | return SCM_BOOL_T; |
ee149d03 | 278 | } |
0f2d19dd | 279 | } |
1bbd0b84 | 280 | #undef FUNC_NAME |
0f2d19dd | 281 | |
c2da2648 GH |
282 | /* move up to read_len chars from port's putback and/or read buffers |
283 | into memory starting at dest. returns the number of chars moved. */ | |
284 | size_t scm_take_from_input_buffers (SCM port, char *dest, size_t read_len) | |
285 | { | |
92c2555f | 286 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
c2da2648 GH |
287 | size_t chars_read = 0; |
288 | size_t from_buf = min (pt->read_end - pt->read_pos, read_len); | |
289 | ||
290 | if (from_buf > 0) | |
291 | { | |
292 | memcpy (dest, pt->read_pos, from_buf); | |
293 | pt->read_pos += from_buf; | |
294 | chars_read += from_buf; | |
295 | read_len -= from_buf; | |
296 | dest += from_buf; | |
297 | } | |
298 | ||
299 | /* if putback was active, try the real input buffer too. */ | |
300 | if (pt->read_buf == pt->putback_buf) | |
301 | { | |
302 | from_buf = min (pt->saved_read_end - pt->saved_read_pos, read_len); | |
303 | if (from_buf > 0) | |
304 | { | |
305 | memcpy (dest, pt->saved_read_pos, from_buf); | |
306 | pt->saved_read_pos += from_buf; | |
307 | chars_read += from_buf; | |
308 | } | |
309 | } | |
310 | return chars_read; | |
311 | } | |
312 | ||
6c951427 | 313 | /* Clear a port's read buffers, returning the contents. */ |
a1ec6916 | 314 | SCM_DEFINE (scm_drain_input, "drain-input", 1, 0, 0, |
1bbd0b84 | 315 | (SCM port), |
e1546b65 | 316 | "Drain @var{port}'s read buffers (including any pushed-back\n" |
1e6808ea | 317 | "characters) and return the content as a single string.") |
1bbd0b84 | 318 | #define FUNC_NAME s_scm_drain_input |
ee149d03 | 319 | { |
840ae05d | 320 | SCM result; |
92c2555f | 321 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
c014a02e | 322 | long count; |
ee149d03 | 323 | |
3b3b36dd | 324 | SCM_VALIDATE_OPINPORT (1,port); |
840ae05d | 325 | |
6c951427 GH |
326 | count = pt->read_end - pt->read_pos; |
327 | if (pt->read_buf == pt->putback_buf) | |
328 | count += pt->saved_read_end - pt->saved_read_pos; | |
840ae05d | 329 | |
be54b15d | 330 | result = scm_allocate_string (count); |
c2da2648 | 331 | scm_take_from_input_buffers (port, SCM_STRING_CHARS (result), count); |
6c951427 | 332 | |
840ae05d | 333 | return result; |
ee149d03 | 334 | } |
1bbd0b84 | 335 | #undef FUNC_NAME |
0f2d19dd JB |
336 | |
337 | \f | |
d68fee48 | 338 | /* Standard ports --- current input, output, error, and more(!). */ |
0f2d19dd | 339 | |
3b3b36dd | 340 | SCM_DEFINE (scm_current_input_port, "current-input-port", 0, 0, 0, |
e1546b65 MG |
341 | (), |
342 | "Return the current input port. This is the default port used\n" | |
343 | "by many input procedures. Initially, @code{current-input-port}\n" | |
344 | "returns the @dfn{standard input} in Unix and C terminology.") | |
1bbd0b84 | 345 | #define FUNC_NAME s_scm_current_input_port |
0f2d19dd JB |
346 | { |
347 | return scm_cur_inp; | |
348 | } | |
1bbd0b84 | 349 | #undef FUNC_NAME |
0f2d19dd | 350 | |
3b3b36dd | 351 | SCM_DEFINE (scm_current_output_port, "current-output-port", 0, 0, 0, |
e1546b65 MG |
352 | (), |
353 | "Return the current output port. This is the default port used\n" | |
354 | "by many output procedures. Initially, \n" | |
355 | "@code{current-output-port} returns the @dfn{standard output} in\n" | |
356 | "Unix and C terminology.") | |
1bbd0b84 | 357 | #define FUNC_NAME s_scm_current_output_port |
0f2d19dd JB |
358 | { |
359 | return scm_cur_outp; | |
360 | } | |
1bbd0b84 | 361 | #undef FUNC_NAME |
0f2d19dd | 362 | |
3b3b36dd | 363 | SCM_DEFINE (scm_current_error_port, "current-error-port", 0, 0, 0, |
1bbd0b84 | 364 | (), |
b380b885 MD |
365 | "Return the port to which errors and warnings should be sent (the\n" |
366 | "@dfn{standard error} in Unix and C terminology).") | |
1bbd0b84 | 367 | #define FUNC_NAME s_scm_current_error_port |
0f2d19dd JB |
368 | { |
369 | return scm_cur_errp; | |
370 | } | |
1bbd0b84 | 371 | #undef FUNC_NAME |
0f2d19dd | 372 | |
3b3b36dd | 373 | SCM_DEFINE (scm_current_load_port, "current-load-port", 0, 0, 0, |
e1546b65 | 374 | (), |
b450f070 | 375 | "Return the current-load-port.\n" |
e1546b65 | 376 | "The load port is used internally by @code{primitive-load}.") |
1bbd0b84 | 377 | #define FUNC_NAME s_scm_current_load_port |
31614d8e MD |
378 | { |
379 | return scm_cur_loadp; | |
380 | } | |
1bbd0b84 | 381 | #undef FUNC_NAME |
31614d8e | 382 | |
3b3b36dd | 383 | SCM_DEFINE (scm_set_current_input_port, "set-current-input-port", 1, 0, 0, |
1bbd0b84 | 384 | (SCM port), |
b380b885 MD |
385 | "@deffnx primitive set-current-output-port port\n" |
386 | "@deffnx primitive set-current-error-port port\n" | |
387 | "Change the ports returned by @code{current-input-port},\n" | |
388 | "@code{current-output-port} and @code{current-error-port}, respectively,\n" | |
389 | "so that they use the supplied @var{port} for input or output.") | |
1bbd0b84 | 390 | #define FUNC_NAME s_scm_set_current_input_port |
0f2d19dd JB |
391 | { |
392 | SCM oinp = scm_cur_inp; | |
3b3b36dd | 393 | SCM_VALIDATE_OPINPORT (1,port); |
0f2d19dd JB |
394 | scm_cur_inp = port; |
395 | return oinp; | |
396 | } | |
1bbd0b84 | 397 | #undef FUNC_NAME |
0f2d19dd JB |
398 | |
399 | ||
3b3b36dd | 400 | SCM_DEFINE (scm_set_current_output_port, "set-current-output-port", 1, 0, 0, |
e1546b65 MG |
401 | (SCM port), |
402 | "Set the current default output port to @var{port}.") | |
1bbd0b84 | 403 | #define FUNC_NAME s_scm_set_current_output_port |
0f2d19dd JB |
404 | { |
405 | SCM ooutp = scm_cur_outp; | |
78446828 | 406 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 407 | SCM_VALIDATE_OPOUTPORT (1,port); |
0f2d19dd JB |
408 | scm_cur_outp = port; |
409 | return ooutp; | |
410 | } | |
1bbd0b84 | 411 | #undef FUNC_NAME |
0f2d19dd JB |
412 | |
413 | ||
3b3b36dd | 414 | SCM_DEFINE (scm_set_current_error_port, "set-current-error-port", 1, 0, 0, |
e1546b65 MG |
415 | (SCM port), |
416 | "Set the current default error port to @var{port}.") | |
1bbd0b84 | 417 | #define FUNC_NAME s_scm_set_current_error_port |
0f2d19dd JB |
418 | { |
419 | SCM oerrp = scm_cur_errp; | |
78446828 | 420 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 421 | SCM_VALIDATE_OPOUTPORT (1,port); |
0f2d19dd JB |
422 | scm_cur_errp = port; |
423 | return oerrp; | |
424 | } | |
1bbd0b84 | 425 | #undef FUNC_NAME |
0f2d19dd JB |
426 | |
427 | \f | |
840ae05d | 428 | /* The port table --- an array of pointers to ports. */ |
0f2d19dd | 429 | |
92c2555f | 430 | scm_t_port **scm_t_portable; |
0f2d19dd | 431 | |
92c2555f MV |
432 | long scm_t_portable_size = 0; /* Number of ports in scm_t_portable. */ |
433 | long scm_t_portable_room = 20; /* Size of the array. */ | |
0f2d19dd | 434 | |
ee149d03 | 435 | /* Add a port to the table. */ |
1cc91f1b | 436 | |
92c2555f | 437 | scm_t_port * |
a284e297 | 438 | scm_add_to_port_table (SCM port) |
c6c79933 | 439 | #define FUNC_NAME "scm_add_to_port_table" |
0f2d19dd | 440 | { |
92c2555f | 441 | scm_t_port *entry; |
840ae05d | 442 | |
92c2555f | 443 | if (scm_t_portable_size == scm_t_portable_room) |
0f2d19dd | 444 | { |
c6c79933 GH |
445 | /* initial malloc is in gc.c. this doesn't use scm_must_malloc etc., |
446 | since it can never be freed during gc. */ | |
92c2555f MV |
447 | void *newt = realloc ((char *) scm_t_portable, |
448 | (size_t) (sizeof (scm_t_port *) | |
449 | * scm_t_portable_room * 2)); | |
ee149d03 | 450 | if (newt == NULL) |
840ae05d | 451 | scm_memory_error ("scm_add_to_port_table"); |
92c2555f MV |
452 | scm_t_portable = (scm_t_port **) newt; |
453 | scm_t_portable_room *= 2; | |
0f2d19dd | 454 | } |
92c2555f | 455 | entry = (scm_t_port *) scm_must_malloc (sizeof (scm_t_port), FUNC_NAME); |
840ae05d JB |
456 | |
457 | entry->port = port; | |
92c2555f | 458 | entry->entry = scm_t_portable_size; |
840ae05d JB |
459 | entry->revealed = 0; |
460 | entry->stream = 0; | |
461 | entry->file_name = SCM_BOOL_F; | |
462 | entry->line_number = 0; | |
463 | entry->column_number = 0; | |
6c951427 GH |
464 | entry->putback_buf = 0; |
465 | entry->putback_buf_size = 0; | |
61e452ba | 466 | entry->rw_active = SCM_PORT_NEITHER; |
0de97b83 | 467 | entry->rw_random = 0; |
840ae05d | 468 | |
92c2555f MV |
469 | scm_t_portable[scm_t_portable_size] = entry; |
470 | scm_t_portable_size++; | |
840ae05d JB |
471 | |
472 | return entry; | |
0f2d19dd | 473 | } |
c6c79933 | 474 | #undef FUNC_NAME |
0f2d19dd | 475 | |
6c951427 | 476 | /* Remove a port from the table and destroy it. */ |
1cc91f1b | 477 | |
0f2d19dd | 478 | void |
a284e297 | 479 | scm_remove_from_port_table (SCM port) |
db4b4ca6 | 480 | #define FUNC_NAME "scm_remove_from_port_table" |
0f2d19dd | 481 | { |
92c2555f | 482 | scm_t_port *p = SCM_PTAB_ENTRY (port); |
c014a02e | 483 | long i = p->entry; |
6c951427 | 484 | |
92c2555f | 485 | if (i >= scm_t_portable_size) |
1afff620 | 486 | SCM_MISC_ERROR ("Port not in table: ~S", scm_list_1 (port)); |
6c951427 | 487 | if (p->putback_buf) |
c6c79933 GH |
488 | scm_must_free (p->putback_buf); |
489 | scm_must_free (p); | |
ee1e7e13 MD |
490 | /* Since we have just freed slot i we can shrink the table by moving |
491 | the last entry to that slot... */ | |
92c2555f | 492 | if (i < scm_t_portable_size - 1) |
0f2d19dd | 493 | { |
92c2555f MV |
494 | scm_t_portable[i] = scm_t_portable[scm_t_portable_size - 1]; |
495 | scm_t_portable[i]->entry = i; | |
0f2d19dd | 496 | } |
0f2d19dd | 497 | SCM_SETPTAB_ENTRY (port, 0); |
92c2555f | 498 | scm_t_portable_size--; |
0f2d19dd | 499 | } |
db4b4ca6 DH |
500 | #undef FUNC_NAME |
501 | ||
0f2d19dd | 502 | |
fea6b4ea | 503 | #ifdef GUILE_DEBUG |
b450f070 | 504 | /* Functions for debugging. */ |
1cc91f1b | 505 | |
3b3b36dd | 506 | SCM_DEFINE (scm_pt_size, "pt-size", 0, 0, 0, |
b450f070 | 507 | (), |
1e6808ea | 508 | "Return the number of ports in the port table. @code{pt-size}\n" |
5352393c | 509 | "is only included in @code{--enable-guile-debug} builds.") |
1bbd0b84 | 510 | #define FUNC_NAME s_scm_pt_size |
0f2d19dd | 511 | { |
92c2555f | 512 | return SCM_MAKINUM (scm_t_portable_size); |
0f2d19dd | 513 | } |
1bbd0b84 | 514 | #undef FUNC_NAME |
0f2d19dd | 515 | |
3b3b36dd | 516 | SCM_DEFINE (scm_pt_member, "pt-member", 1, 0, 0, |
b450f070 | 517 | (SCM index), |
1e6808ea | 518 | "Return the port at @var{index} in the port table.\n" |
5352393c MG |
519 | "@code{pt-member} is only included in\n" |
520 | "@code{--enable-guile-debug} builds.") | |
1bbd0b84 | 521 | #define FUNC_NAME s_scm_pt_member |
0f2d19dd | 522 | { |
c014a02e | 523 | long i; |
b450f070 | 524 | SCM_VALIDATE_INUM_COPY (1,index,i); |
92c2555f | 525 | if (i < 0 || i >= scm_t_portable_size) |
0f2d19dd JB |
526 | return SCM_BOOL_F; |
527 | else | |
92c2555f | 528 | return scm_t_portable[i]->port; |
0f2d19dd | 529 | } |
1bbd0b84 | 530 | #undef FUNC_NAME |
0f2d19dd JB |
531 | #endif |
532 | ||
70df8af6 | 533 | void |
92c2555f | 534 | scm_port_non_buffer (scm_t_port *pt) |
70df8af6 GH |
535 | { |
536 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; | |
537 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
538 | pt->read_buf_size = pt->write_buf_size = 1; | |
539 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
540 | } | |
0f2d19dd | 541 | |
d68fee48 JB |
542 | \f |
543 | /* Revealed counts --- an oddity inherited from SCSH. */ | |
544 | ||
8b13c6b3 GH |
545 | /* Find a port in the table and return its revealed count. |
546 | Also used by the garbage collector. | |
0f2d19dd | 547 | */ |
1cc91f1b | 548 | |
0f2d19dd | 549 | int |
a284e297 | 550 | scm_revealed_count (SCM port) |
0f2d19dd JB |
551 | { |
552 | return SCM_REVEALED(port); | |
553 | } | |
554 | ||
555 | ||
556 | ||
557 | /* Return the revealed count for a port. */ | |
558 | ||
3b3b36dd | 559 | SCM_DEFINE (scm_port_revealed, "port-revealed", 1, 0, 0, |
1bbd0b84 | 560 | (SCM port), |
1e6808ea | 561 | "Return the revealed count for @var{port}.") |
1bbd0b84 | 562 | #define FUNC_NAME s_scm_port_revealed |
0f2d19dd | 563 | { |
78446828 | 564 | port = SCM_COERCE_OUTPORT (port); |
c9dcc5ae | 565 | SCM_VALIDATE_OPENPORT (1,port); |
8b13c6b3 | 566 | return SCM_MAKINUM (scm_revealed_count (port)); |
0f2d19dd | 567 | } |
1bbd0b84 | 568 | #undef FUNC_NAME |
0f2d19dd JB |
569 | |
570 | /* Set the revealed count for a port. */ | |
3b3b36dd | 571 | SCM_DEFINE (scm_set_port_revealed_x, "set-port-revealed!", 2, 0, 0, |
1bbd0b84 | 572 | (SCM port, SCM rcount), |
b450f070 | 573 | "Sets the revealed count for a port to a given value.\n" |
b380b885 | 574 | "The return value is unspecified.") |
1bbd0b84 | 575 | #define FUNC_NAME s_scm_set_port_revealed_x |
0f2d19dd | 576 | { |
78446828 | 577 | port = SCM_COERCE_OUTPORT (port); |
c9dcc5ae | 578 | SCM_VALIDATE_OPENPORT (1,port); |
3b3b36dd | 579 | SCM_VALIDATE_INUM (2,rcount); |
0f2d19dd | 580 | SCM_REVEALED (port) = SCM_INUM (rcount); |
8b13c6b3 | 581 | return SCM_UNSPECIFIED; |
0f2d19dd | 582 | } |
1bbd0b84 | 583 | #undef FUNC_NAME |
0f2d19dd | 584 | |
d68fee48 JB |
585 | |
586 | \f | |
587 | /* Retrieving a port's mode. */ | |
588 | ||
eadd48de GH |
589 | /* Return the flags that characterize a port based on the mode |
590 | * string used to open a file for that port. | |
591 | * | |
592 | * See PORT FLAGS in scm.h | |
593 | */ | |
594 | ||
595 | long | |
a284e297 | 596 | scm_mode_bits (char *modes) |
eadd48de GH |
597 | { |
598 | return (SCM_OPN | |
599 | | (strchr (modes, 'r') || strchr (modes, '+') ? SCM_RDNG : 0) | |
600 | | ( strchr (modes, 'w') | |
601 | || strchr (modes, 'a') | |
602 | || strchr (modes, '+') ? SCM_WRTNG : 0) | |
ee149d03 JB |
603 | | (strchr (modes, '0') ? SCM_BUF0 : 0) |
604 | | (strchr (modes, 'l') ? SCM_BUFLINE : 0)); | |
eadd48de GH |
605 | } |
606 | ||
607 | ||
608 | /* Return the mode flags from an open port. | |
609 | * Some modes such as "append" are only used when opening | |
610 | * a file and are not returned here. */ | |
611 | ||
3b3b36dd | 612 | SCM_DEFINE (scm_port_mode, "port-mode", 1, 0, 0, |
1bbd0b84 | 613 | (SCM port), |
1e6808ea MG |
614 | "Return the port modes associated with the open port @var{port}.\n" |
615 | "These will not necessarily be identical to the modes used when\n" | |
616 | "the port was opened, since modes such as \"append\" which are\n" | |
617 | "used only during port creation are not retained.") | |
1bbd0b84 | 618 | #define FUNC_NAME s_scm_port_mode |
eadd48de | 619 | { |
26a3038d | 620 | char modes[4]; |
eadd48de | 621 | modes[0] = '\0'; |
78446828 MV |
622 | |
623 | port = SCM_COERCE_OUTPORT (port); | |
3b3b36dd | 624 | SCM_VALIDATE_OPPORT (1,port); |
f9a64404 DH |
625 | if (SCM_CELL_WORD_0 (port) & SCM_RDNG) { |
626 | if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) | |
eadd48de GH |
627 | strcpy (modes, "r+"); |
628 | else | |
629 | strcpy (modes, "r"); | |
630 | } | |
f9a64404 | 631 | else if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) |
eadd48de | 632 | strcpy (modes, "w"); |
f9a64404 | 633 | if (SCM_CELL_WORD_0 (port) & SCM_BUF0) |
eadd48de | 634 | strcat (modes, "0"); |
36284627 | 635 | return scm_mem2string (modes, strlen (modes)); |
eadd48de | 636 | } |
1bbd0b84 | 637 | #undef FUNC_NAME |
eadd48de GH |
638 | |
639 | ||
d68fee48 JB |
640 | \f |
641 | /* Closing ports. */ | |
642 | ||
0f2d19dd JB |
643 | /* scm_close_port |
644 | * Call the close operation on a port object. | |
eadd48de | 645 | * see also scm_close. |
0f2d19dd | 646 | */ |
3b3b36dd | 647 | SCM_DEFINE (scm_close_port, "close-port", 1, 0, 0, |
1bbd0b84 | 648 | (SCM port), |
1e6808ea MG |
649 | "Close the specified port object. Return @code{#t} if it\n" |
650 | "successfully closes a port or @code{#f} if it was already\n" | |
651 | "closed. An exception may be raised if an error occurs, for\n" | |
652 | "example when flushing buffered output. See also @ref{Ports and\n" | |
653 | "File Descriptors, close}, for a procedure which can close file\n" | |
654 | "descriptors.") | |
1bbd0b84 | 655 | #define FUNC_NAME s_scm_close_port |
0f2d19dd | 656 | { |
1be6b49c | 657 | size_t i; |
eadd48de GH |
658 | int rv; |
659 | ||
78446828 MV |
660 | port = SCM_COERCE_OUTPORT (port); |
661 | ||
7a754ca6 | 662 | SCM_VALIDATE_PORT (1, port); |
0f2d19dd | 663 | if (SCM_CLOSEDP (port)) |
eadd48de | 664 | return SCM_BOOL_F; |
0f2d19dd | 665 | i = SCM_PTOBNUM (port); |
affc96b5 GH |
666 | if (scm_ptobs[i].close) |
667 | rv = (scm_ptobs[i].close) (port); | |
eadd48de GH |
668 | else |
669 | rv = 0; | |
0f2d19dd | 670 | scm_remove_from_port_table (port); |
22a52da1 | 671 | SCM_CLR_PORT_OPEN_FLAG (port); |
36284627 | 672 | return SCM_BOOL (rv >= 0); |
7a754ca6 MD |
673 | } |
674 | #undef FUNC_NAME | |
675 | ||
676 | SCM_DEFINE (scm_close_input_port, "close-input-port", 1, 0, 0, | |
677 | (SCM port), | |
678 | "Close the specified input port object. The routine has no effect if\n" | |
679 | "the file has already been closed. An exception may be raised if an\n" | |
680 | "error occurs. The value returned is unspecified.\n\n" | |
681 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
682 | "which can close file descriptors.") | |
683 | #define FUNC_NAME s_scm_close_input_port | |
684 | { | |
685 | SCM_VALIDATE_INPUT_PORT (1, port); | |
686 | scm_close_port (port); | |
687 | return SCM_UNSPECIFIED; | |
688 | } | |
689 | #undef FUNC_NAME | |
690 | ||
691 | SCM_DEFINE (scm_close_output_port, "close-output-port", 1, 0, 0, | |
692 | (SCM port), | |
693 | "Close the specified output port object. The routine has no effect if\n" | |
694 | "the file has already been closed. An exception may be raised if an\n" | |
695 | "error occurs. The value returned is unspecified.\n\n" | |
696 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
697 | "which can close file descriptors.") | |
698 | #define FUNC_NAME s_scm_close_output_port | |
699 | { | |
700 | port = SCM_COERCE_OUTPORT (port); | |
701 | SCM_VALIDATE_OUTPUT_PORT (1, port); | |
702 | scm_close_port (port); | |
703 | return SCM_UNSPECIFIED; | |
0f2d19dd | 704 | } |
1bbd0b84 | 705 | #undef FUNC_NAME |
0f2d19dd | 706 | |
c2ca4493 GH |
707 | SCM_DEFINE (scm_port_for_each, "port-for-each", 1, 0, 0, |
708 | (SCM proc), | |
709 | "Apply @var{proc} to each port in the Guile port table\n" | |
2f1bbcfd MV |
710 | "in turn. The return value is unspecified. More specifically,\n" |
711 | "@var{proc} is applied exactly once to every port that exists\n" | |
712 | "in the system at the time @var{port-for-each} is invoked.\n" | |
713 | "Changes to the port table while @var{port-for-each} is running\n" | |
714 | "have no effect as far as @var{port-for-each} is concerned.\n") | |
c2ca4493 GH |
715 | #define FUNC_NAME s_scm_port_for_each |
716 | { | |
c014a02e | 717 | long i; |
fdfe6305 MV |
718 | SCM ports; |
719 | ||
c2ca4493 GH |
720 | SCM_VALIDATE_PROC (1, proc); |
721 | ||
722 | /* when pre-emptive multithreading is supported, access to the port | |
723 | table will need to be controlled by a mutex. */ | |
fdfe6305 MV |
724 | |
725 | /* Even without pre-emptive multithreading, running arbitrary code | |
726 | while scanning the port table is unsafe because the port table | |
727 | can change arbitrarily (from a GC, for example). So we build a | |
728 | list in advance while blocking the GC. -mvo */ | |
729 | ||
c2ca4493 | 730 | SCM_DEFER_INTS; |
fdfe6305 MV |
731 | scm_block_gc++; |
732 | ports = SCM_EOL; | |
92c2555f MV |
733 | for (i = 0; i < scm_t_portable_size; i++) |
734 | ports = scm_cons (scm_t_portable[i]->port, ports); | |
fdfe6305 MV |
735 | scm_block_gc--; |
736 | SCM_ALLOW_INTS; | |
737 | ||
738 | while (ports != SCM_EOL) | |
c2ca4493 | 739 | { |
fdc28395 | 740 | scm_call_1 (proc, SCM_CAR (ports)); |
fdfe6305 | 741 | ports = SCM_CDR (ports); |
c2ca4493 | 742 | } |
fdfe6305 | 743 | |
c2ca4493 GH |
744 | return SCM_UNSPECIFIED; |
745 | } | |
746 | #undef FUNC_NAME | |
747 | ||
b875c468 GH |
748 | #if (SCM_DEBUG_DEPRECATED == 0) |
749 | ||
3b3b36dd | 750 | SCM_DEFINE (scm_close_all_ports_except, "close-all-ports-except", 0, 0, 1, |
1bbd0b84 | 751 | (SCM ports), |
b875c468 | 752 | "[DEPRECATED] Close all open file ports used by the interpreter\n" |
b380b885 | 753 | "except for those supplied as arguments. This procedure\n" |
b875c468 GH |
754 | "was intended to be used before an exec call to close file descriptors\n" |
755 | "which are not needed in the new process. However it has the\n" | |
756 | "undesirable side-effect of flushing buffes, so it's deprecated.\n" | |
757 | "Use port-for-each instead.") | |
1bbd0b84 | 758 | #define FUNC_NAME s_scm_close_all_ports_except |
0f2d19dd | 759 | { |
c014a02e | 760 | long i = 0; |
af45e3b0 | 761 | SCM_VALIDATE_REST_ARGUMENT (ports); |
92c2555f | 762 | while (i < scm_t_portable_size) |
0f2d19dd | 763 | { |
92c2555f | 764 | SCM thisport = scm_t_portable[i]->port; |
0f2d19dd JB |
765 | int found = 0; |
766 | SCM ports_ptr = ports; | |
767 | ||
36284627 | 768 | while (!SCM_NULLP (ports_ptr)) |
0f2d19dd | 769 | { |
78446828 | 770 | SCM port = SCM_COERCE_OUTPORT (SCM_CAR (ports_ptr)); |
0f2d19dd | 771 | if (i == 0) |
3b3b36dd | 772 | SCM_VALIDATE_OPPORT (SCM_ARG1,port); |
54778cd3 | 773 | if (SCM_EQ_P (port, thisport)) |
0f2d19dd JB |
774 | found = 1; |
775 | ports_ptr = SCM_CDR (ports_ptr); | |
776 | } | |
777 | if (found) | |
778 | i++; | |
779 | else | |
780 | /* i is not to be incremented here. */ | |
781 | scm_close_port (thisport); | |
782 | } | |
0f2d19dd JB |
783 | return SCM_UNSPECIFIED; |
784 | } | |
1bbd0b84 | 785 | #undef FUNC_NAME |
0f2d19dd | 786 | |
b875c468 | 787 | #endif |
d68fee48 JB |
788 | |
789 | \f | |
790 | /* Utter miscellany. Gosh, we should clean this up some time. */ | |
791 | ||
3b3b36dd | 792 | SCM_DEFINE (scm_input_port_p, "input-port?", 1, 0, 0, |
1bbd0b84 | 793 | (SCM x), |
1e6808ea MG |
794 | "Return @code{#t} if @var{x} is an input port, otherwise return\n" |
795 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
796 | "@code{port?}.") | |
1bbd0b84 | 797 | #define FUNC_NAME s_scm_input_port_p |
0f2d19dd | 798 | { |
36284627 | 799 | return SCM_BOOL (SCM_INPUT_PORT_P (x)); |
0f2d19dd | 800 | } |
1bbd0b84 | 801 | #undef FUNC_NAME |
0f2d19dd | 802 | |
3b3b36dd | 803 | SCM_DEFINE (scm_output_port_p, "output-port?", 1, 0, 0, |
1bbd0b84 | 804 | (SCM x), |
1e6808ea MG |
805 | "Return @code{#t} if @var{x} is an output port, otherwise return\n" |
806 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
807 | "@code{port?}.") | |
1bbd0b84 | 808 | #define FUNC_NAME s_scm_output_port_p |
0f2d19dd | 809 | { |
82893676 | 810 | x = SCM_COERCE_OUTPORT (x); |
36284627 | 811 | return SCM_BOOL (SCM_OUTPUT_PORT_P (x)); |
0f2d19dd | 812 | } |
1bbd0b84 | 813 | #undef FUNC_NAME |
0f2d19dd | 814 | |
eb5c0a2a GH |
815 | SCM_DEFINE (scm_port_p, "port?", 1, 0, 0, |
816 | (SCM x), | |
1e6808ea | 817 | "Return a boolean indicating whether @var{x} is a port.\n" |
5352393c MG |
818 | "Equivalent to @code{(or (input-port? @var{x}) (output-port?\n" |
819 | "@var{x}))}.") | |
eb5c0a2a GH |
820 | #define FUNC_NAME s_scm_port_p |
821 | { | |
822 | return SCM_BOOL (SCM_PORTP (x)); | |
823 | } | |
824 | #undef FUNC_NAME | |
825 | ||
3b3b36dd | 826 | SCM_DEFINE (scm_port_closed_p, "port-closed?", 1, 0, 0, |
1bbd0b84 | 827 | (SCM port), |
1e6808ea MG |
828 | "Return @code{#t} if @var{port} is closed or @code{#f} if it is\n" |
829 | "open.") | |
1bbd0b84 | 830 | #define FUNC_NAME s_scm_port_closed_p |
60d0643d | 831 | { |
c1bfcf60 | 832 | SCM_VALIDATE_PORT (1,port); |
36284627 | 833 | return SCM_BOOL (!SCM_OPPORTP (port)); |
60d0643d | 834 | } |
1bbd0b84 | 835 | #undef FUNC_NAME |
0f2d19dd | 836 | |
3b3b36dd | 837 | SCM_DEFINE (scm_eof_object_p, "eof-object?", 1, 0, 0, |
1bbd0b84 | 838 | (SCM x), |
1e6808ea MG |
839 | "Return @code{#t} if @var{x} is an end-of-file object; otherwise\n" |
840 | "return @code{#f}.") | |
1bbd0b84 | 841 | #define FUNC_NAME s_scm_eof_object_p |
0f2d19dd | 842 | { |
1bbd0b84 | 843 | return SCM_BOOL(SCM_EOF_OBJECT_P (x)); |
0f2d19dd | 844 | } |
1bbd0b84 | 845 | #undef FUNC_NAME |
0f2d19dd | 846 | |
3b3b36dd | 847 | SCM_DEFINE (scm_force_output, "force-output", 0, 1, 0, |
1bbd0b84 | 848 | (SCM port), |
b380b885 MD |
849 | "Flush the specified output port, or the current output port if @var{port}\n" |
850 | "is omitted. The current output buffer contents are passed to the \n" | |
851 | "underlying port implementation (e.g., in the case of fports, the\n" | |
852 | "data will be written to the file and the output buffer will be cleared.)\n" | |
853 | "It has no effect on an unbuffered port.\n\n" | |
854 | "The return value is unspecified.") | |
1bbd0b84 | 855 | #define FUNC_NAME s_scm_force_output |
0f2d19dd JB |
856 | { |
857 | if (SCM_UNBNDP (port)) | |
3e877d15 | 858 | port = scm_cur_outp; |
0f2d19dd | 859 | else |
78446828 MV |
860 | { |
861 | port = SCM_COERCE_OUTPORT (port); | |
3b3b36dd | 862 | SCM_VALIDATE_OPOUTPORT (1,port); |
78446828 | 863 | } |
affc96b5 | 864 | scm_flush (port); |
ee149d03 | 865 | return SCM_UNSPECIFIED; |
0f2d19dd | 866 | } |
1bbd0b84 | 867 | #undef FUNC_NAME |
0f2d19dd | 868 | |
a1ec6916 | 869 | SCM_DEFINE (scm_flush_all_ports, "flush-all-ports", 0, 0, 0, |
1bbd0b84 | 870 | (), |
b380b885 MD |
871 | "Equivalent to calling @code{force-output} on\n" |
872 | "all open output ports. The return value is unspecified.") | |
1bbd0b84 | 873 | #define FUNC_NAME s_scm_flush_all_ports |
89ea5b7c | 874 | { |
1be6b49c | 875 | size_t i; |
89ea5b7c | 876 | |
92c2555f | 877 | for (i = 0; i < scm_t_portable_size; i++) |
89ea5b7c | 878 | { |
92c2555f MV |
879 | if (SCM_OPOUTPORTP (scm_t_portable[i]->port)) |
880 | scm_flush (scm_t_portable[i]->port); | |
89ea5b7c GH |
881 | } |
882 | return SCM_UNSPECIFIED; | |
883 | } | |
1bbd0b84 | 884 | #undef FUNC_NAME |
0f2d19dd | 885 | |
3b3b36dd | 886 | SCM_DEFINE (scm_read_char, "read-char", 0, 1, 0, |
1bbd0b84 | 887 | (SCM port), |
1e6808ea MG |
888 | "Return the next character available from @var{port}, updating\n" |
889 | "@var{port} to point to the following character. If no more\n" | |
890 | "characters are available, the end-of-file object is returned.") | |
1bbd0b84 | 891 | #define FUNC_NAME s_scm_read_char |
0f2d19dd JB |
892 | { |
893 | int c; | |
894 | if (SCM_UNBNDP (port)) | |
334341aa | 895 | port = scm_cur_inp; |
3b3b36dd | 896 | SCM_VALIDATE_OPINPORT (1,port); |
b7f3516f | 897 | c = scm_getc (port); |
0f2d19dd JB |
898 | if (EOF == c) |
899 | return SCM_EOF_VAL; | |
7866a09b | 900 | return SCM_MAKE_CHAR (c); |
0f2d19dd | 901 | } |
1bbd0b84 | 902 | #undef FUNC_NAME |
0f2d19dd | 903 | |
5c070ca7 | 904 | /* this should only be called when the read buffer is empty. it |
affc96b5 | 905 | tries to refill the read buffer. it returns the first char from |
5c070ca7 | 906 | the port, which is either EOF or *(pt->read_pos). */ |
6c951427 | 907 | int |
affc96b5 | 908 | scm_fill_input (SCM port) |
6c951427 | 909 | { |
92c2555f | 910 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e | 911 | |
6c951427 GH |
912 | if (pt->read_buf == pt->putback_buf) |
913 | { | |
914 | /* finished reading put-back chars. */ | |
915 | pt->read_buf = pt->saved_read_buf; | |
916 | pt->read_pos = pt->saved_read_pos; | |
917 | pt->read_end = pt->saved_read_end; | |
918 | pt->read_buf_size = pt->saved_read_buf_size; | |
919 | if (pt->read_pos < pt->read_end) | |
5c070ca7 | 920 | return *(pt->read_pos); |
6c951427 | 921 | } |
affc96b5 | 922 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
6c951427 GH |
923 | } |
924 | ||
ee149d03 | 925 | int |
a284e297 | 926 | scm_getc (SCM port) |
0f2d19dd JB |
927 | { |
928 | int c; | |
92c2555f | 929 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 | 930 | |
840ae05d JB |
931 | if (pt->rw_active == SCM_PORT_WRITE) |
932 | { | |
affc96b5 GH |
933 | /* may be marginally faster than calling scm_flush. */ |
934 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
840ae05d | 935 | } |
6c951427 | 936 | |
5c070ca7 GH |
937 | if (pt->rw_random) |
938 | pt->rw_active = SCM_PORT_READ; | |
939 | ||
940 | if (pt->read_pos >= pt->read_end) | |
ee149d03 | 941 | { |
affc96b5 | 942 | if (scm_fill_input (port) == EOF) |
5c070ca7 | 943 | return EOF; |
ee149d03 JB |
944 | } |
945 | ||
5c070ca7 | 946 | c = *(pt->read_pos++); |
840ae05d | 947 | |
ee149d03 JB |
948 | if (c == '\n') |
949 | { | |
950 | SCM_INCLINE (port); | |
951 | } | |
952 | else if (c == '\t') | |
953 | { | |
954 | SCM_TABCOL (port); | |
955 | } | |
956 | else | |
957 | { | |
958 | SCM_INCCOL (port); | |
959 | } | |
960 | ||
961 | return c; | |
0f2d19dd JB |
962 | } |
963 | ||
ee149d03 | 964 | void |
a284e297 | 965 | scm_putc (char c, SCM port) |
ee149d03 | 966 | { |
265e6a4d | 967 | scm_lfwrite (&c, 1, port); |
ee149d03 | 968 | } |
3cb988bd | 969 | |
ee149d03 | 970 | void |
70d63753 | 971 | scm_puts (const char *s, SCM port) |
3cb988bd | 972 | { |
265e6a4d | 973 | scm_lfwrite (s, strlen (s), port); |
ee149d03 | 974 | } |
3cb988bd | 975 | |
6fe692e9 MD |
976 | /* scm_lfwrite |
977 | * | |
53802ea8 MV |
978 | * This function differs from scm_c_write; it updates port line and |
979 | * column. */ | |
6fe692e9 | 980 | |
ee149d03 | 981 | void |
1be6b49c | 982 | scm_lfwrite (const char *ptr, size_t size, SCM port) |
ee149d03 | 983 | { |
92c2555f MV |
984 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
985 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
3e2043c4 | 986 | |
840ae05d | 987 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 988 | scm_end_input (port); |
283a1a0e | 989 | |
31703ab8 | 990 | ptob->write (port, ptr, size); |
840ae05d | 991 | |
53802ea8 MV |
992 | for (; size; ptr++, size--) { |
993 | if (*ptr == '\n') { | |
994 | SCM_INCLINE(port); | |
995 | } | |
996 | else if (*ptr == '\t') { | |
997 | SCM_TABCOL(port); | |
998 | } | |
999 | else { | |
1000 | SCM_INCCOL(port); | |
1001 | } | |
1002 | } | |
1003 | ||
840ae05d JB |
1004 | if (pt->rw_random) |
1005 | pt->rw_active = SCM_PORT_WRITE; | |
ee149d03 | 1006 | } |
3cb988bd | 1007 | |
6fe692e9 MD |
1008 | /* scm_c_read |
1009 | * | |
1010 | * Used by an application to read arbitrary number of bytes from an | |
1011 | * SCM port. Same semantics as libc read, except that scm_c_read only | |
1012 | * returns less than SIZE bytes if at end-of-file. | |
1013 | * | |
1014 | * Warning: Doesn't update port line and column counts! */ | |
1015 | ||
1be6b49c ML |
1016 | size_t |
1017 | scm_c_read (SCM port, void *buffer, size_t size) | |
6fe692e9 | 1018 | { |
92c2555f | 1019 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1be6b49c | 1020 | size_t n_read = 0, n_available; |
6fe692e9 MD |
1021 | |
1022 | if (pt->rw_active == SCM_PORT_WRITE) | |
1023 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
1024 | ||
1025 | if (pt->rw_random) | |
1026 | pt->rw_active = SCM_PORT_READ; | |
1027 | ||
1028 | if (SCM_READ_BUFFER_EMPTY_P (pt)) | |
1029 | { | |
1030 | if (scm_fill_input (port) == EOF) | |
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | n_available = pt->read_end - pt->read_pos; | |
1035 | ||
1036 | while (n_available < size) | |
1037 | { | |
1038 | memcpy (buffer, pt->read_pos, n_available); | |
910d1e40 | 1039 | buffer = (char *) buffer + n_available; |
6fe692e9 MD |
1040 | pt->read_pos += n_available; |
1041 | n_read += n_available; | |
1042 | ||
1043 | if (SCM_READ_BUFFER_EMPTY_P (pt)) | |
1044 | { | |
1045 | if (scm_fill_input (port) == EOF) | |
1046 | return n_read; | |
1047 | } | |
1048 | ||
1049 | size -= n_available; | |
1050 | n_available = pt->read_end - pt->read_pos; | |
1051 | } | |
1052 | ||
1053 | memcpy (buffer, pt->read_pos, size); | |
1054 | pt->read_pos += size; | |
1055 | ||
1056 | return n_read + size; | |
1057 | } | |
1058 | ||
1059 | /* scm_c_write | |
1060 | * | |
1061 | * Used by an application to write arbitrary number of bytes to an SCM | |
1062 | * port. Similar semantics as libc write. However, unlike libc | |
1063 | * write, scm_c_write writes the requested number of bytes and has no | |
1064 | * return value. | |
1065 | * | |
1066 | * Warning: Doesn't update port line and column counts! | |
1067 | */ | |
1068 | ||
1069 | void | |
1be6b49c | 1070 | scm_c_write (SCM port, const void *ptr, size_t size) |
6fe692e9 | 1071 | { |
92c2555f MV |
1072 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1073 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
6fe692e9 MD |
1074 | |
1075 | if (pt->rw_active == SCM_PORT_READ) | |
1076 | scm_end_input (port); | |
1077 | ||
1078 | ptob->write (port, ptr, size); | |
1079 | ||
1080 | if (pt->rw_random) | |
1081 | pt->rw_active = SCM_PORT_WRITE; | |
1082 | } | |
3cb988bd | 1083 | |
ee149d03 | 1084 | void |
a284e297 | 1085 | scm_flush (SCM port) |
ee149d03 | 1086 | { |
c014a02e | 1087 | long i = SCM_PTOBNUM (port); |
affc96b5 | 1088 | (scm_ptobs[i].flush) (port); |
ee149d03 JB |
1089 | } |
1090 | ||
283a1a0e | 1091 | void |
a284e297 | 1092 | scm_end_input (SCM port) |
283a1a0e | 1093 | { |
c014a02e | 1094 | long offset; |
92c2555f | 1095 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e GH |
1096 | |
1097 | if (pt->read_buf == pt->putback_buf) | |
1098 | { | |
1099 | offset = pt->read_end - pt->read_pos; | |
1100 | pt->read_buf = pt->saved_read_buf; | |
1101 | pt->read_pos = pt->saved_read_pos; | |
1102 | pt->read_end = pt->saved_read_end; | |
1103 | pt->read_buf_size = pt->saved_read_buf_size; | |
1104 | } | |
1105 | else | |
1106 | offset = 0; | |
1107 | ||
affc96b5 | 1108 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
283a1a0e GH |
1109 | } |
1110 | ||
ee149d03 JB |
1111 | \f |
1112 | ||
1113 | ||
1114 | void | |
a284e297 | 1115 | scm_ungetc (int c, SCM port) |
c6c79933 | 1116 | #define FUNC_NAME "scm_ungetc" |
ee149d03 | 1117 | { |
92c2555f | 1118 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
840ae05d | 1119 | |
6c951427 GH |
1120 | if (pt->read_buf == pt->putback_buf) |
1121 | /* already using the put-back buffer. */ | |
1122 | { | |
1123 | /* enlarge putback_buf if necessary. */ | |
1124 | if (pt->read_end == pt->read_buf + pt->read_buf_size | |
1125 | && pt->read_buf == pt->read_pos) | |
1126 | { | |
1be6b49c | 1127 | size_t new_size = pt->read_buf_size * 2; |
c6c79933 GH |
1128 | unsigned char *tmp = (unsigned char *) |
1129 | scm_must_realloc (pt->putback_buf, pt->read_buf_size, new_size, | |
1130 | FUNC_NAME); | |
6c951427 | 1131 | |
6c951427 GH |
1132 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; |
1133 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
1134 | pt->read_buf_size = pt->putback_buf_size = new_size; | |
1135 | } | |
1136 | ||
1137 | /* shift any existing bytes to buffer + 1. */ | |
1138 | if (pt->read_pos == pt->read_end) | |
1139 | pt->read_end = pt->read_buf + 1; | |
1140 | else if (pt->read_pos != pt->read_buf + 1) | |
1141 | { | |
1142 | int count = pt->read_end - pt->read_pos; | |
1143 | ||
1144 | memmove (pt->read_buf + 1, pt->read_pos, count); | |
1145 | pt->read_end = pt->read_buf + 1 + count; | |
1146 | } | |
1147 | ||
1148 | pt->read_pos = pt->read_buf; | |
1149 | } | |
1150 | else | |
1151 | /* switch to the put-back buffer. */ | |
1152 | { | |
1153 | if (pt->putback_buf == NULL) | |
1154 | { | |
c357d546 | 1155 | pt->putback_buf |
c6c79933 GH |
1156 | = (unsigned char *) scm_must_malloc (SCM_INITIAL_PUTBACK_BUF_SIZE, |
1157 | FUNC_NAME); | |
6c951427 GH |
1158 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; |
1159 | } | |
1160 | ||
1161 | pt->saved_read_buf = pt->read_buf; | |
1162 | pt->saved_read_pos = pt->read_pos; | |
1163 | pt->saved_read_end = pt->read_end; | |
1164 | pt->saved_read_buf_size = pt->read_buf_size; | |
1165 | ||
1166 | pt->read_pos = pt->read_buf = pt->putback_buf; | |
1167 | pt->read_end = pt->read_buf + 1; | |
1168 | pt->read_buf_size = pt->putback_buf_size; | |
1169 | } | |
1170 | ||
1171 | *pt->read_buf = c; | |
ee149d03 | 1172 | |
840ae05d JB |
1173 | if (pt->rw_random) |
1174 | pt->rw_active = SCM_PORT_READ; | |
1175 | ||
ee149d03 JB |
1176 | if (c == '\n') |
1177 | { | |
1178 | /* What should col be in this case? | |
1179 | * We'll leave it at -1. | |
1180 | */ | |
1181 | SCM_LINUM (port) -= 1; | |
1182 | } | |
1183 | else | |
1184 | SCM_COL(port) -= 1; | |
1185 | } | |
c6c79933 | 1186 | #undef FUNC_NAME |
ee149d03 JB |
1187 | |
1188 | ||
1189 | void | |
70d63753 | 1190 | scm_ungets (const char *s, int n, SCM port) |
ee149d03 JB |
1191 | { |
1192 | /* This is simple minded and inefficient, but unreading strings is | |
1193 | * probably not a common operation, and remember that line and | |
1194 | * column numbers have to be handled... | |
1195 | * | |
1196 | * Please feel free to write an optimized version! | |
1197 | */ | |
1198 | while (n--) | |
1199 | scm_ungetc (s[n], port); | |
1200 | } | |
1201 | ||
1202 | ||
3b3b36dd | 1203 | SCM_DEFINE (scm_peek_char, "peek-char", 0, 1, 0, |
1bbd0b84 | 1204 | (SCM port), |
1e6808ea MG |
1205 | "Return the next character available from @var{port},\n" |
1206 | "@emph{without} updating @var{port} to point to the following\n" | |
1207 | "character. If no more characters are available, the\n" | |
1208 | "end-of-file object is returned.@footnote{The value returned by\n" | |
1209 | "a call to @code{peek-char} is the same as the value that would\n" | |
1210 | "have been returned by a call to @code{read-char} on the same\n" | |
1211 | "port. The only difference is that the very next call to\n" | |
1212 | "@code{read-char} or @code{peek-char} on that @var{port} will\n" | |
1213 | "return the value returned by the preceding call to\n" | |
1214 | "@code{peek-char}. In particular, a call to @code{peek-char} on\n" | |
1215 | "an interactive port will hang waiting for input whenever a call\n" | |
1216 | "to @code{read-char} would have hung.}") | |
1bbd0b84 | 1217 | #define FUNC_NAME s_scm_peek_char |
ee149d03 JB |
1218 | { |
1219 | int c; | |
1220 | if (SCM_UNBNDP (port)) | |
1221 | port = scm_cur_inp; | |
1222 | else | |
3b3b36dd | 1223 | SCM_VALIDATE_OPINPORT (1,port); |
ee149d03 JB |
1224 | c = scm_getc (port); |
1225 | if (EOF == c) | |
1226 | return SCM_EOF_VAL; | |
1227 | scm_ungetc (c, port); | |
7866a09b | 1228 | return SCM_MAKE_CHAR (c); |
3cb988bd | 1229 | } |
1bbd0b84 | 1230 | #undef FUNC_NAME |
3cb988bd | 1231 | |
1be4270a | 1232 | SCM_DEFINE (scm_unread_char, "unread-char", 1, 1, 0, |
1bbd0b84 | 1233 | (SCM cobj, SCM port), |
b380b885 MD |
1234 | "Place @var{char} in @var{port} so that it will be read by the\n" |
1235 | "next read operation. If called multiple times, the unread characters\n" | |
1236 | "will be read again in last-in first-out order. If @var{port} is\n" | |
1237 | "not supplied, the current input port is used.") | |
1bbd0b84 | 1238 | #define FUNC_NAME s_scm_unread_char |
0f2d19dd JB |
1239 | { |
1240 | int c; | |
1241 | ||
7866a09b | 1242 | SCM_VALIDATE_CHAR (1,cobj); |
0f2d19dd JB |
1243 | if (SCM_UNBNDP (port)) |
1244 | port = scm_cur_inp; | |
1245 | else | |
3b3b36dd | 1246 | SCM_VALIDATE_OPINPORT (2,port); |
0f2d19dd | 1247 | |
7866a09b | 1248 | c = SCM_CHAR (cobj); |
0f2d19dd | 1249 | |
b7f3516f | 1250 | scm_ungetc (c, port); |
0f2d19dd JB |
1251 | return cobj; |
1252 | } | |
1bbd0b84 | 1253 | #undef FUNC_NAME |
0f2d19dd | 1254 | |
a1ec6916 | 1255 | SCM_DEFINE (scm_unread_string, "unread-string", 2, 0, 0, |
1bbd0b84 | 1256 | (SCM str, SCM port), |
b380b885 MD |
1257 | "Place the string @var{str} in @var{port} so that its characters will be\n" |
1258 | "read in subsequent read operations. If called multiple times, the\n" | |
1259 | "unread characters will be read again in last-in first-out order. If\n" | |
1260 | "@var{port} is not supplied, the current-input-port is used.") | |
1bbd0b84 | 1261 | #define FUNC_NAME s_scm_unread_string |
ee1e7e13 | 1262 | { |
3b3b36dd | 1263 | SCM_VALIDATE_STRING (1,str); |
ee1e7e13 MD |
1264 | if (SCM_UNBNDP (port)) |
1265 | port = scm_cur_inp; | |
1266 | else | |
3b3b36dd | 1267 | SCM_VALIDATE_OPINPORT (2,port); |
ee1e7e13 | 1268 | |
34f0f2b8 | 1269 | scm_ungets (SCM_STRING_CHARS (str), SCM_STRING_LENGTH (str), port); |
ee1e7e13 MD |
1270 | |
1271 | return str; | |
1272 | } | |
1bbd0b84 | 1273 | #undef FUNC_NAME |
ee1e7e13 | 1274 | |
a1ec6916 | 1275 | SCM_DEFINE (scm_seek, "seek", 3, 0, 0, |
1e6808ea MG |
1276 | (SCM fd_port, SCM offset, SCM whence), |
1277 | "Sets the current position of @var{fd/port} to the integer\n" | |
1278 | "@var{offset}, which is interpreted according to the value of\n" | |
1279 | "@var{whence}.\n" | |
1280 | "\n" | |
1281 | "One of the following variables should be supplied for\n" | |
1282 | "@var{whence}:\n" | |
b380b885 MD |
1283 | "@defvar SEEK_SET\n" |
1284 | "Seek from the beginning of the file.\n" | |
1285 | "@end defvar\n" | |
1286 | "@defvar SEEK_CUR\n" | |
1287 | "Seek from the current position.\n" | |
1288 | "@end defvar\n" | |
1289 | "@defvar SEEK_END\n" | |
1290 | "Seek from the end of the file.\n" | |
1e6808ea MG |
1291 | "@end defvar\n" |
1292 | "If @var{fd/port} is a file descriptor, the underlying system\n" | |
1293 | "call is @code{lseek}. @var{port} may be a string port.\n" | |
1294 | "\n" | |
1295 | "The value returned is the new position in the file. This means\n" | |
1296 | "that the current position of a port can be obtained using:\n" | |
1297 | "@lisp\n" | |
b380b885 | 1298 | "(seek port 0 SEEK_CUR)\n" |
1e6808ea | 1299 | "@end lisp") |
1bbd0b84 | 1300 | #define FUNC_NAME s_scm_seek |
840ae05d JB |
1301 | { |
1302 | off_t off; | |
1303 | off_t rv; | |
1304 | int how; | |
1305 | ||
1e6808ea | 1306 | fd_port = SCM_COERCE_OUTPORT (fd_port); |
840ae05d | 1307 | |
6fe692e9 MD |
1308 | off = SCM_NUM2LONG (2, offset); |
1309 | SCM_VALIDATE_INUM_COPY (3, whence, how); | |
840ae05d | 1310 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) |
1bbd0b84 | 1311 | SCM_OUT_OF_RANGE (3, whence); |
1e6808ea | 1312 | if (SCM_OPPORTP (fd_port)) |
840ae05d | 1313 | { |
92c2555f | 1314 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (fd_port); |
840ae05d JB |
1315 | |
1316 | if (!ptob->seek) | |
1bbd0b84 | 1317 | SCM_MISC_ERROR ("port is not seekable", |
1e6808ea | 1318 | scm_cons (fd_port, SCM_EOL)); |
840ae05d | 1319 | else |
1e6808ea | 1320 | rv = ptob->seek (fd_port, off, how); |
840ae05d JB |
1321 | } |
1322 | else /* file descriptor?. */ | |
1323 | { | |
1e6808ea MG |
1324 | SCM_VALIDATE_INUM (1,fd_port); |
1325 | rv = lseek (SCM_INUM (fd_port), off, how); | |
840ae05d | 1326 | if (rv == -1) |
1bbd0b84 | 1327 | SCM_SYSERROR; |
840ae05d JB |
1328 | } |
1329 | return scm_long2num (rv); | |
1330 | } | |
1bbd0b84 | 1331 | #undef FUNC_NAME |
840ae05d | 1332 | |
82893676 MG |
1333 | #ifdef __MINGW32__ |
1334 | /* Define this function since it is not supported under Windows. */ | |
1335 | static int truncate (char *file, int length) | |
1336 | { | |
1337 | int ret = -1, fdes; | |
1338 | if ((fdes = open (file, O_BINARY | O_WRONLY)) != -1) | |
1339 | { | |
1340 | ret = chsize (fdes, length); | |
1341 | close (fdes); | |
1342 | } | |
1343 | return ret; | |
1344 | } | |
1345 | #endif /* __MINGW32__ */ | |
1346 | ||
a1ec6916 | 1347 | SCM_DEFINE (scm_truncate_file, "truncate-file", 1, 1, 0, |
1bbd0b84 | 1348 | (SCM object, SCM length), |
1e6808ea MG |
1349 | "Truncates the object referred to by @var{object} to at most\n" |
1350 | "@var{length} bytes. @var{object} can be a string containing a\n" | |
1351 | "file name or an integer file descriptor or a port.\n" | |
1352 | "@var{length} may be omitted if @var{object} is not a file name,\n" | |
1353 | "in which case the truncation occurs at the current port.\n" | |
1354 | "position. The return value is unspecified.") | |
1bbd0b84 | 1355 | #define FUNC_NAME s_scm_truncate_file |
840ae05d | 1356 | { |
69bc9ff3 GH |
1357 | int rv; |
1358 | off_t c_length; | |
1359 | ||
1360 | /* object can be a port, fdes or filename. */ | |
840ae05d | 1361 | |
840ae05d JB |
1362 | if (SCM_UNBNDP (length)) |
1363 | { | |
69bc9ff3 | 1364 | /* must supply length if object is a filename. */ |
a6d9e5ab | 1365 | if (SCM_STRINGP (object)) |
c1bfcf60 | 1366 | SCM_MISC_ERROR("must supply length if OBJECT is a filename",SCM_EOL); |
69bc9ff3 | 1367 | |
c94577b4 | 1368 | length = scm_seek (object, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); |
840ae05d | 1369 | } |
1bbd0b84 | 1370 | c_length = SCM_NUM2LONG (2,length); |
69bc9ff3 | 1371 | if (c_length < 0) |
1bbd0b84 | 1372 | SCM_MISC_ERROR ("negative offset", SCM_EOL); |
3fe6190f | 1373 | |
69bc9ff3 GH |
1374 | object = SCM_COERCE_OUTPORT (object); |
1375 | if (SCM_INUMP (object)) | |
1376 | { | |
1377 | SCM_SYSCALL (rv = ftruncate (SCM_INUM (object), c_length)); | |
1378 | } | |
0c95b57d | 1379 | else if (SCM_OPOUTPORTP (object)) |
69bc9ff3 | 1380 | { |
92c2555f MV |
1381 | scm_t_port *pt = SCM_PTAB_ENTRY (object); |
1382 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); | |
69bc9ff3 | 1383 | |
affc96b5 | 1384 | if (!ptob->truncate) |
1bbd0b84 | 1385 | SCM_MISC_ERROR ("port is not truncatable", SCM_EOL); |
69bc9ff3 | 1386 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1387 | scm_end_input (object); |
69bc9ff3 | 1388 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1389 | ptob->flush (object); |
69bc9ff3 | 1390 | |
affc96b5 | 1391 | ptob->truncate (object, c_length); |
69bc9ff3 GH |
1392 | rv = 0; |
1393 | } | |
1394 | else | |
1395 | { | |
a6d9e5ab DH |
1396 | SCM_VALIDATE_STRING (1, object); |
1397 | SCM_STRING_COERCE_0TERMINATION_X (object); | |
1398 | SCM_SYSCALL (rv = truncate (SCM_STRING_CHARS (object), c_length)); | |
69bc9ff3 GH |
1399 | } |
1400 | if (rv == -1) | |
1bbd0b84 | 1401 | SCM_SYSERROR; |
840ae05d JB |
1402 | return SCM_UNSPECIFIED; |
1403 | } | |
1bbd0b84 | 1404 | #undef FUNC_NAME |
840ae05d | 1405 | |
a1ec6916 | 1406 | SCM_DEFINE (scm_port_line, "port-line", 1, 0, 0, |
1bbd0b84 | 1407 | (SCM port), |
e1546b65 | 1408 | "Return the current line number for @var{port}.") |
1bbd0b84 | 1409 | #define FUNC_NAME s_scm_port_line |
0f2d19dd | 1410 | { |
78446828 | 1411 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 1412 | SCM_VALIDATE_OPENPORT (1,port); |
360fc44c | 1413 | return SCM_MAKINUM (SCM_LINUM (port)); |
0f2d19dd | 1414 | } |
1bbd0b84 | 1415 | #undef FUNC_NAME |
0f2d19dd | 1416 | |
a1ec6916 | 1417 | SCM_DEFINE (scm_set_port_line_x, "set-port-line!", 2, 0, 0, |
1bbd0b84 | 1418 | (SCM port, SCM line), |
e1546b65 | 1419 | "Set the current line number for @var{port} to @var{line}.") |
1bbd0b84 | 1420 | #define FUNC_NAME s_scm_set_port_line_x |
d043d8c2 | 1421 | { |
360fc44c | 1422 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd GB |
1423 | SCM_VALIDATE_OPENPORT (1,port); |
1424 | SCM_VALIDATE_INUM (2,line); | |
564478fd GB |
1425 | SCM_PTAB_ENTRY (port)->line_number = SCM_INUM (line); |
1426 | return SCM_UNSPECIFIED; | |
d043d8c2 | 1427 | } |
1bbd0b84 | 1428 | #undef FUNC_NAME |
d043d8c2 | 1429 | |
a1ec6916 | 1430 | SCM_DEFINE (scm_port_column, "port-column", 1, 0, 0, |
1bbd0b84 | 1431 | (SCM port), |
650a1cf9 NJ |
1432 | "@deffnx primitive port-line port\n" |
1433 | "Return the current column number or line number of @var{port},\n" | |
b380b885 MD |
1434 | "using the current input port if none is specified. If the number is\n" |
1435 | "unknown, the result is #f. Otherwise, the result is a 0-origin integer\n" | |
1436 | "- i.e. the first character of the first line is line 0, column 0.\n" | |
1437 | "(However, when you display a file position, for example in an error\n" | |
650a1cf9 | 1438 | "message, we recommend you add 1 to get 1-origin integers. This is\n" |
b380b885 MD |
1439 | "because lines and column numbers traditionally start with 1, and that is\n" |
1440 | "what non-programmers will find most natural.)") | |
1bbd0b84 | 1441 | #define FUNC_NAME s_scm_port_column |
0f2d19dd | 1442 | { |
78446828 | 1443 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 1444 | SCM_VALIDATE_OPENPORT (1,port); |
360fc44c | 1445 | return SCM_MAKINUM (SCM_COL (port)); |
0f2d19dd | 1446 | } |
1bbd0b84 | 1447 | #undef FUNC_NAME |
0f2d19dd | 1448 | |
a1ec6916 | 1449 | SCM_DEFINE (scm_set_port_column_x, "set-port-column!", 2, 0, 0, |
1bbd0b84 | 1450 | (SCM port, SCM column), |
92ccc1f1 NJ |
1451 | "@deffnx primitive set-port-line! port line\n" |
1452 | "Set the current column or line number of @var{port}, using the\n" | |
b380b885 | 1453 | "current input port if none is specified.") |
1bbd0b84 | 1454 | #define FUNC_NAME s_scm_set_port_column_x |
d043d8c2 | 1455 | { |
360fc44c | 1456 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd GB |
1457 | SCM_VALIDATE_OPENPORT (1,port); |
1458 | SCM_VALIDATE_INUM (2,column); | |
564478fd GB |
1459 | SCM_PTAB_ENTRY (port)->column_number = SCM_INUM (column); |
1460 | return SCM_UNSPECIFIED; | |
d043d8c2 | 1461 | } |
1bbd0b84 | 1462 | #undef FUNC_NAME |
d043d8c2 | 1463 | |
a1ec6916 | 1464 | SCM_DEFINE (scm_port_filename, "port-filename", 1, 0, 0, |
1bbd0b84 | 1465 | (SCM port), |
b380b885 | 1466 | "Return the filename associated with @var{port}. This function returns\n" |
2a2a730b | 1467 | "the strings \"standard input\", \"standard output\" and \"standard error\"\n" |
a3c8b9fc | 1468 | "when called on the current input, output and error ports respectively.") |
1bbd0b84 | 1469 | #define FUNC_NAME s_scm_port_filename |
0f2d19dd | 1470 | { |
78446828 | 1471 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 1472 | SCM_VALIDATE_OPENPORT (1,port); |
b24b5e13 | 1473 | return SCM_FILENAME (port); |
0f2d19dd | 1474 | } |
1bbd0b84 | 1475 | #undef FUNC_NAME |
0f2d19dd | 1476 | |
a1ec6916 | 1477 | SCM_DEFINE (scm_set_port_filename_x, "set-port-filename!", 2, 0, 0, |
1bbd0b84 | 1478 | (SCM port, SCM filename), |
b380b885 MD |
1479 | "Change the filename associated with @var{port}, using the current input\n" |
1480 | "port if none is specified. Note that this does not change the port's\n" | |
1481 | "source of data, but only the value that is returned by\n" | |
1482 | "@code{port-filename} and reported in diagnostic output.") | |
1bbd0b84 | 1483 | #define FUNC_NAME s_scm_set_port_filename_x |
d14af9f2 | 1484 | { |
360fc44c | 1485 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 1486 | SCM_VALIDATE_OPENPORT (1,port); |
360fc44c | 1487 | /* We allow the user to set the filename to whatever he likes. */ |
b24b5e13 DH |
1488 | SCM_SET_FILENAME (port, filename); |
1489 | return SCM_UNSPECIFIED; | |
d14af9f2 | 1490 | } |
1bbd0b84 | 1491 | #undef FUNC_NAME |
d14af9f2 | 1492 | |
0f2d19dd JB |
1493 | #ifndef ttyname |
1494 | extern char * ttyname(); | |
1495 | #endif | |
1496 | ||
f12733c9 MD |
1497 | void |
1498 | scm_print_port_mode (SCM exp, SCM port) | |
1499 | { | |
1500 | scm_puts (SCM_CLOSEDP (exp) | |
1501 | ? "closed: " | |
f9a64404 DH |
1502 | : (SCM_RDNG & SCM_CELL_WORD_0 (exp) |
1503 | ? (SCM_WRTNG & SCM_CELL_WORD_0 (exp) | |
f12733c9 MD |
1504 | ? "input-output: " |
1505 | : "input: ") | |
f9a64404 | 1506 | : (SCM_WRTNG & SCM_CELL_WORD_0 (exp) |
f12733c9 MD |
1507 | ? "output: " |
1508 | : "bogus: ")), | |
1509 | port); | |
1510 | } | |
1cc91f1b | 1511 | |
f12733c9 | 1512 | int |
e81d98ec | 1513 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 1514 | { |
f12733c9 MD |
1515 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
1516 | if (!type) | |
1517 | type = "port"; | |
b7f3516f | 1518 | scm_puts ("#<", port); |
f12733c9 | 1519 | scm_print_port_mode (exp, port); |
b7f3516f TT |
1520 | scm_puts (type, port); |
1521 | scm_putc (' ', port); | |
12a8b769 | 1522 | scm_intprint (SCM_CELL_WORD_1 (exp), 16, port); |
b7f3516f | 1523 | scm_putc ('>', port); |
f12733c9 | 1524 | return 1; |
0f2d19dd JB |
1525 | } |
1526 | ||
0f2d19dd JB |
1527 | void |
1528 | scm_ports_prehistory () | |
0f2d19dd JB |
1529 | { |
1530 | scm_numptob = 0; | |
92c2555f | 1531 | scm_ptobs = (scm_t_ptob_descriptor *) malloc (sizeof (scm_t_ptob_descriptor)); |
0f2d19dd | 1532 | } |
0f2d19dd JB |
1533 | |
1534 | \f | |
ee149d03 | 1535 | |
d68fee48 | 1536 | /* Void ports. */ |
0f2d19dd | 1537 | |
92c2555f | 1538 | scm_t_bits scm_tc16_void_port = 0; |
0f2d19dd | 1539 | |
e81d98ec | 1540 | static int fill_input_void_port (SCM port SCM_UNUSED) |
283a1a0e | 1541 | { |
70df8af6 | 1542 | return EOF; |
283a1a0e GH |
1543 | } |
1544 | ||
31703ab8 | 1545 | static void |
e81d98ec DH |
1546 | write_void_port (SCM port SCM_UNUSED, |
1547 | const void *data SCM_UNUSED, | |
1548 | size_t size SCM_UNUSED) | |
31703ab8 GH |
1549 | { |
1550 | } | |
1551 | ||
0f2d19dd | 1552 | SCM |
a284e297 | 1553 | scm_void_port (char *mode_str) |
0f2d19dd JB |
1554 | { |
1555 | int mode_bits; | |
1556 | SCM answer; | |
92c2555f | 1557 | scm_t_port * pt; |
0f2d19dd JB |
1558 | |
1559 | SCM_NEWCELL (answer); | |
1560 | SCM_DEFER_INTS; | |
1561 | mode_bits = scm_mode_bits (mode_str); | |
1562 | pt = scm_add_to_port_table (answer); | |
70df8af6 | 1563 | scm_port_non_buffer (pt); |
0f2d19dd | 1564 | SCM_SETPTAB_ENTRY (answer, pt); |
ee149d03 | 1565 | SCM_SETSTREAM (answer, 0); |
54778cd3 | 1566 | SCM_SET_CELL_TYPE (answer, scm_tc16_void_port | mode_bits); |
0f2d19dd JB |
1567 | SCM_ALLOW_INTS; |
1568 | return answer; | |
1569 | } | |
1570 | ||
a1ec6916 | 1571 | SCM_DEFINE (scm_sys_make_void_port, "%make-void-port", 1, 0, 0, |
1bbd0b84 | 1572 | (SCM mode), |
70df8af6 GH |
1573 | "Create and return a new void port. A void port acts like\n" |
1574 | "/dev/null. The @var{mode} argument\n" | |
1575 | "specifies the input/output modes for this port: see the\n" | |
b380b885 | 1576 | "documentation for @code{open-file} in @ref{File Ports}.") |
1bbd0b84 | 1577 | #define FUNC_NAME s_scm_sys_make_void_port |
0f2d19dd | 1578 | { |
a6d9e5ab DH |
1579 | SCM_VALIDATE_STRING (1, mode); |
1580 | SCM_STRING_COERCE_0TERMINATION_X (mode); | |
1581 | return scm_void_port (SCM_STRING_CHARS (mode)); | |
0f2d19dd | 1582 | } |
1bbd0b84 | 1583 | #undef FUNC_NAME |
0f2d19dd | 1584 | |
0f2d19dd | 1585 | \f |
89545eba | 1586 | /* Initialization. */ |
1cc91f1b | 1587 | |
0f2d19dd JB |
1588 | void |
1589 | scm_init_ports () | |
0f2d19dd | 1590 | { |
840ae05d | 1591 | /* lseek() symbols. */ |
86d31dfe MV |
1592 | scm_c_define ("SEEK_SET", SCM_MAKINUM (SEEK_SET)); |
1593 | scm_c_define ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR)); | |
1594 | scm_c_define ("SEEK_END", SCM_MAKINUM (SEEK_END)); | |
840ae05d | 1595 | |
70df8af6 GH |
1596 | scm_tc16_void_port = scm_make_port_type ("void", fill_input_void_port, |
1597 | write_void_port); | |
8dc9439f | 1598 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 1599 | #include "libguile/ports.x" |
8dc9439f | 1600 | #endif |
0f2d19dd | 1601 | } |
89e00824 ML |
1602 | |
1603 | /* | |
1604 | Local Variables: | |
1605 | c-file-style: "gnu" | |
1606 | End: | |
1607 | */ |