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7a754ca6 | 1 | /* Copyright (C) 1995,1996,1997,1998,1999, 2000 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> |
a0599745 | 49 | #include "libguile/_scm.h" |
f0942910 | 50 | #include "libguile/eval.h" |
a0599745 MD |
51 | #include "libguile/objects.h" |
52 | #include "libguile/smob.h" | |
53 | #include "libguile/chars.h" | |
0f2d19dd | 54 | |
a0599745 MD |
55 | #include "libguile/keywords.h" |
56 | #include "libguile/root.h" | |
57 | #include "libguile/strings.h" | |
20e6290e | 58 | |
a0599745 MD |
59 | #include "libguile/validate.h" |
60 | #include "libguile/ports.h" | |
0f2d19dd | 61 | |
bd9e24b3 GH |
62 | #ifdef HAVE_STRING_H |
63 | #include <string.h> | |
64 | #endif | |
65 | ||
0f2d19dd | 66 | #ifdef HAVE_MALLOC_H |
95b88819 | 67 | #include <malloc.h> |
0f2d19dd JB |
68 | #endif |
69 | ||
70 | #ifdef HAVE_UNISTD_H | |
71 | #include <unistd.h> | |
72 | #endif | |
73 | ||
95b88819 GH |
74 | #ifdef HAVE_SYS_IOCTL_H |
75 | #include <sys/ioctl.h> | |
76 | #endif | |
d68fee48 | 77 | |
0f2d19dd | 78 | \f |
d68fee48 | 79 | /* The port kind table --- a dynamically resized array of port types. */ |
0f2d19dd JB |
80 | |
81 | ||
82 | /* scm_ptobs scm_numptob | |
83 | * implement a dynamicly resized array of ptob records. | |
84 | * Indexes into this table are used when generating type | |
85 | * tags for smobjects (if you know a tag you can get an index and conversely). | |
86 | */ | |
f12733c9 | 87 | scm_ptob_descriptor *scm_ptobs; |
a1c95c45 | 88 | int scm_numptob; |
0f2d19dd | 89 | |
ee149d03 | 90 | /* GC marker for a port with stream of SCM type. */ |
0f2d19dd | 91 | SCM |
a284e297 | 92 | scm_markstream (SCM ptr) |
0f2d19dd JB |
93 | { |
94 | int openp; | |
f9a64404 | 95 | openp = SCM_CELL_WORD_0 (ptr) & SCM_OPN; |
0f2d19dd | 96 | if (openp) |
74a16888 | 97 | return SCM_PACK (SCM_STREAM (ptr)); |
0f2d19dd JB |
98 | else |
99 | return SCM_BOOL_F; | |
100 | } | |
101 | ||
f12733c9 | 102 | /* |
f12733c9 | 103 | * We choose to use an interface similar to the smob interface with |
affc96b5 | 104 | * fill_input and write as standard fields, passed to the port |
f12733c9 MD |
105 | * type constructor, and optional fields set by setters. |
106 | */ | |
107 | ||
70df8af6 GH |
108 | static void |
109 | flush_port_default (SCM port) | |
110 | { | |
111 | } | |
112 | ||
113 | static void | |
114 | end_input_default (SCM port, int offset) | |
115 | { | |
116 | } | |
0f2d19dd | 117 | |
a98bddfd | 118 | scm_bits_t |
f12733c9 | 119 | scm_make_port_type (char *name, |
affc96b5 | 120 | int (*fill_input) (SCM port), |
8aa011a1 | 121 | void (*write) (SCM port, const void *data, size_t size)) |
0f2d19dd JB |
122 | { |
123 | char *tmp; | |
124 | if (255 <= scm_numptob) | |
125 | goto ptoberr; | |
f12733c9 MD |
126 | SCM_DEFER_INTS; |
127 | SCM_SYSCALL (tmp = (char *) realloc ((char *) scm_ptobs, | |
128 | (1 + scm_numptob) | |
129 | * sizeof (scm_ptob_descriptor))); | |
0f2d19dd JB |
130 | if (tmp) |
131 | { | |
f12733c9 | 132 | scm_ptobs = (scm_ptob_descriptor *) tmp; |
affc96b5 | 133 | |
f12733c9 MD |
134 | scm_ptobs[scm_numptob].name = name; |
135 | scm_ptobs[scm_numptob].mark = 0; | |
136 | scm_ptobs[scm_numptob].free = scm_free0; | |
137 | scm_ptobs[scm_numptob].print = scm_port_print; | |
138 | scm_ptobs[scm_numptob].equalp = 0; | |
affc96b5 GH |
139 | scm_ptobs[scm_numptob].close = 0; |
140 | ||
141 | scm_ptobs[scm_numptob].write = write; | |
70df8af6 | 142 | scm_ptobs[scm_numptob].flush = flush_port_default; |
affc96b5 | 143 | |
70df8af6 | 144 | scm_ptobs[scm_numptob].end_input = end_input_default; |
affc96b5 GH |
145 | scm_ptobs[scm_numptob].fill_input = fill_input; |
146 | scm_ptobs[scm_numptob].input_waiting = 0; | |
147 | ||
f12733c9 | 148 | scm_ptobs[scm_numptob].seek = 0; |
affc96b5 GH |
149 | scm_ptobs[scm_numptob].truncate = 0; |
150 | ||
0f2d19dd JB |
151 | scm_numptob++; |
152 | } | |
f12733c9 | 153 | SCM_ALLOW_INTS; |
0f2d19dd | 154 | if (!tmp) |
2500356c DH |
155 | { |
156 | ptoberr: | |
157 | scm_memory_error ("scm_make_port_type"); | |
158 | } | |
f12733c9 MD |
159 | /* Make a class object if Goops is present */ |
160 | if (scm_port_class) | |
161 | scm_make_port_classes (scm_numptob - 1, SCM_PTOBNAME (scm_numptob - 1)); | |
0f2d19dd JB |
162 | return scm_tc7_port + (scm_numptob - 1) * 256; |
163 | } | |
164 | ||
f12733c9 | 165 | void |
6c747373 | 166 | scm_set_port_mark (long tc, SCM (*mark) (SCM)) |
f12733c9 MD |
167 | { |
168 | scm_ptobs[SCM_TC2PTOBNUM (tc)].mark = mark; | |
169 | } | |
170 | ||
171 | void | |
6c747373 | 172 | scm_set_port_free (long tc, scm_sizet (*free) (SCM)) |
f12733c9 MD |
173 | { |
174 | scm_ptobs[SCM_TC2PTOBNUM (tc)].free = free; | |
175 | } | |
176 | ||
177 | void | |
6c747373 | 178 | scm_set_port_print (long tc, int (*print) (SCM exp, SCM port, |
f12733c9 MD |
179 | scm_print_state *pstate)) |
180 | { | |
181 | scm_ptobs[SCM_TC2PTOBNUM (tc)].print = print; | |
182 | } | |
183 | ||
184 | void | |
6c747373 | 185 | scm_set_port_equalp (long tc, SCM (*equalp) (SCM, SCM)) |
f12733c9 MD |
186 | { |
187 | scm_ptobs[SCM_TC2PTOBNUM (tc)].equalp = equalp; | |
188 | } | |
189 | ||
31703ab8 | 190 | void |
affc96b5 | 191 | scm_set_port_flush (long tc, void (*flush) (SCM port)) |
31703ab8 | 192 | { |
affc96b5 | 193 | scm_ptobs[SCM_TC2PTOBNUM (tc)].flush = flush; |
31703ab8 GH |
194 | } |
195 | ||
f12733c9 | 196 | void |
affc96b5 | 197 | scm_set_port_end_input (long tc, void (*end_input) (SCM port, int offset)) |
f12733c9 | 198 | { |
affc96b5 | 199 | scm_ptobs[SCM_TC2PTOBNUM (tc)].end_input = end_input; |
f12733c9 MD |
200 | } |
201 | ||
202 | void | |
6c747373 | 203 | scm_set_port_close (long tc, int (*close) (SCM)) |
f12733c9 | 204 | { |
affc96b5 | 205 | scm_ptobs[SCM_TC2PTOBNUM (tc)].close = close; |
f12733c9 MD |
206 | } |
207 | ||
208 | void | |
6c747373 | 209 | scm_set_port_seek (long tc, off_t (*seek) (SCM port, |
f12733c9 MD |
210 | off_t OFFSET, |
211 | int WHENCE)) | |
212 | { | |
213 | scm_ptobs[SCM_TC2PTOBNUM (tc)].seek = seek; | |
214 | } | |
215 | ||
216 | void | |
6c747373 | 217 | scm_set_port_truncate (long tc, void (*truncate) (SCM port, off_t length)) |
f12733c9 | 218 | { |
affc96b5 | 219 | scm_ptobs[SCM_TC2PTOBNUM (tc)].truncate = truncate; |
f12733c9 MD |
220 | } |
221 | ||
222 | void | |
affc96b5 | 223 | scm_set_port_input_waiting (long tc, int (*input_waiting) (SCM)) |
f12733c9 | 224 | { |
affc96b5 | 225 | scm_ptobs[SCM_TC2PTOBNUM (tc)].input_waiting = input_waiting; |
f12733c9 MD |
226 | } |
227 | ||
0f2d19dd | 228 | \f |
0f2d19dd | 229 | |
3b3b36dd | 230 | SCM_DEFINE (scm_char_ready_p, "char-ready?", 0, 1, 0, |
1bbd0b84 | 231 | (SCM port), |
bfc46627 GB |
232 | "Returns @code{#t} if a character is ready on input @var{port} and\n" |
233 | "returns @code{#f} otherwise. If @code{char-ready?} returns @code{#t}\n" | |
234 | "then the next @code{read-char} operation on @var{port} is\n" | |
235 | "guaranteed not to hang. If @var{port} is a file port at end of\n" | |
236 | "file then @code{char-ready?} returns @code{#t}.\n" | |
237 | "@footnote{@code{char-ready?} exists to make it possible for a\n" | |
238 | "program to accept characters from interactive ports without getting\n" | |
239 | "stuck waiting for input. Any input editors associated with such ports\n" | |
240 | "must make sure that characters whose existence has been asserted by\n" | |
241 | "@code{char-ready?} cannot be rubbed out. If @code{char-ready?} were to\n" | |
242 | "return @code{#f} at end of file, a port at end of file would be\n" | |
243 | "indistinguishable from an interactive port that has no ready\n" | |
244 | "characters.}") | |
1bbd0b84 | 245 | #define FUNC_NAME s_scm_char_ready_p |
0f2d19dd | 246 | { |
ae4c4016 | 247 | scm_port *pt; |
6c951427 | 248 | |
0f2d19dd JB |
249 | if (SCM_UNBNDP (port)) |
250 | port = scm_cur_inp; | |
251 | else | |
3b3b36dd | 252 | SCM_VALIDATE_OPINPORT (1,port); |
d68fee48 | 253 | |
ae4c4016 JB |
254 | pt = SCM_PTAB_ENTRY (port); |
255 | ||
6c951427 GH |
256 | /* if the current read buffer is filled, or the |
257 | last pushed-back char has been read and the saved buffer is | |
258 | filled, result is true. */ | |
259 | if (pt->read_pos < pt->read_end | |
260 | || (pt->read_buf == pt->putback_buf | |
261 | && pt->saved_read_pos < pt->saved_read_end)) | |
0f2d19dd | 262 | return SCM_BOOL_T; |
ee149d03 JB |
263 | else |
264 | { | |
f12733c9 | 265 | scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
ee149d03 | 266 | |
affc96b5 | 267 | if (ptob->input_waiting) |
1bbd0b84 | 268 | return SCM_BOOL(ptob->input_waiting (port)); |
ee149d03 | 269 | else |
6c951427 | 270 | return SCM_BOOL_T; |
ee149d03 | 271 | } |
0f2d19dd | 272 | } |
1bbd0b84 | 273 | #undef FUNC_NAME |
0f2d19dd | 274 | |
c2da2648 GH |
275 | /* move up to read_len chars from port's putback and/or read buffers |
276 | into memory starting at dest. returns the number of chars moved. */ | |
277 | size_t scm_take_from_input_buffers (SCM port, char *dest, size_t read_len) | |
278 | { | |
279 | scm_port *pt = SCM_PTAB_ENTRY (port); | |
280 | size_t chars_read = 0; | |
281 | size_t from_buf = min (pt->read_end - pt->read_pos, read_len); | |
282 | ||
283 | if (from_buf > 0) | |
284 | { | |
285 | memcpy (dest, pt->read_pos, from_buf); | |
286 | pt->read_pos += from_buf; | |
287 | chars_read += from_buf; | |
288 | read_len -= from_buf; | |
289 | dest += from_buf; | |
290 | } | |
291 | ||
292 | /* if putback was active, try the real input buffer too. */ | |
293 | if (pt->read_buf == pt->putback_buf) | |
294 | { | |
295 | from_buf = min (pt->saved_read_end - pt->saved_read_pos, read_len); | |
296 | if (from_buf > 0) | |
297 | { | |
298 | memcpy (dest, pt->saved_read_pos, from_buf); | |
299 | pt->saved_read_pos += from_buf; | |
300 | chars_read += from_buf; | |
301 | } | |
302 | } | |
303 | return chars_read; | |
304 | } | |
305 | ||
6c951427 | 306 | /* Clear a port's read buffers, returning the contents. */ |
a1ec6916 | 307 | SCM_DEFINE (scm_drain_input, "drain-input", 1, 0, 0, |
1bbd0b84 | 308 | (SCM port), |
b380b885 MD |
309 | "Drains @var{PORT}'s read buffers (including any pushed-back characters)\n" |
310 | "and returns the contents as a single string.") | |
1bbd0b84 | 311 | #define FUNC_NAME s_scm_drain_input |
ee149d03 | 312 | { |
840ae05d JB |
313 | SCM result; |
314 | scm_port *pt = SCM_PTAB_ENTRY (port); | |
6c951427 | 315 | int count; |
ee149d03 | 316 | |
3b3b36dd | 317 | SCM_VALIDATE_OPINPORT (1,port); |
840ae05d | 318 | |
6c951427 GH |
319 | count = pt->read_end - pt->read_pos; |
320 | if (pt->read_buf == pt->putback_buf) | |
321 | count += pt->saved_read_end - pt->saved_read_pos; | |
840ae05d | 322 | |
6c951427 | 323 | result = scm_makstr (count, 0); |
c2da2648 | 324 | scm_take_from_input_buffers (port, SCM_STRING_CHARS (result), count); |
6c951427 | 325 | |
840ae05d | 326 | return result; |
ee149d03 | 327 | } |
1bbd0b84 | 328 | #undef FUNC_NAME |
0f2d19dd JB |
329 | |
330 | \f | |
d68fee48 | 331 | /* Standard ports --- current input, output, error, and more(!). */ |
0f2d19dd | 332 | |
3b3b36dd | 333 | SCM_DEFINE (scm_current_input_port, "current-input-port", 0, 0, 0, |
1bbd0b84 | 334 | (), |
bfc46627 GB |
335 | "Returns the current input port. This is the default port used by many\n" |
336 | "input procedures. Initially, @code{current-input-port} returns the\n" | |
337 | "value of @code{???}.") | |
1bbd0b84 | 338 | #define FUNC_NAME s_scm_current_input_port |
0f2d19dd JB |
339 | { |
340 | return scm_cur_inp; | |
341 | } | |
1bbd0b84 | 342 | #undef FUNC_NAME |
0f2d19dd | 343 | |
3b3b36dd | 344 | SCM_DEFINE (scm_current_output_port, "current-output-port", 0, 0, 0, |
1bbd0b84 | 345 | (), |
bfc46627 GB |
346 | "Returns the current output port. This is the default port used by many\n" |
347 | "output procedures. Initially, @code{current-output-port} returns the\n" | |
348 | "value of @code{???}.") | |
1bbd0b84 | 349 | #define FUNC_NAME s_scm_current_output_port |
0f2d19dd JB |
350 | { |
351 | return scm_cur_outp; | |
352 | } | |
1bbd0b84 | 353 | #undef FUNC_NAME |
0f2d19dd | 354 | |
3b3b36dd | 355 | SCM_DEFINE (scm_current_error_port, "current-error-port", 0, 0, 0, |
1bbd0b84 | 356 | (), |
b380b885 MD |
357 | "Return the port to which errors and warnings should be sent (the\n" |
358 | "@dfn{standard error} in Unix and C terminology).") | |
1bbd0b84 | 359 | #define FUNC_NAME s_scm_current_error_port |
0f2d19dd JB |
360 | { |
361 | return scm_cur_errp; | |
362 | } | |
1bbd0b84 | 363 | #undef FUNC_NAME |
0f2d19dd | 364 | |
3b3b36dd | 365 | SCM_DEFINE (scm_current_load_port, "current-load-port", 0, 0, 0, |
1bbd0b84 | 366 | (), |
b450f070 GB |
367 | "Return the current-load-port.\n" |
368 | "The load port is used internally by `primitive-load'.") | |
1bbd0b84 | 369 | #define FUNC_NAME s_scm_current_load_port |
31614d8e MD |
370 | { |
371 | return scm_cur_loadp; | |
372 | } | |
1bbd0b84 | 373 | #undef FUNC_NAME |
31614d8e | 374 | |
3b3b36dd | 375 | SCM_DEFINE (scm_set_current_input_port, "set-current-input-port", 1, 0, 0, |
1bbd0b84 | 376 | (SCM port), |
b380b885 MD |
377 | "@deffnx primitive set-current-output-port port\n" |
378 | "@deffnx primitive set-current-error-port port\n" | |
379 | "Change the ports returned by @code{current-input-port},\n" | |
380 | "@code{current-output-port} and @code{current-error-port}, respectively,\n" | |
381 | "so that they use the supplied @var{port} for input or output.") | |
1bbd0b84 | 382 | #define FUNC_NAME s_scm_set_current_input_port |
0f2d19dd JB |
383 | { |
384 | SCM oinp = scm_cur_inp; | |
3b3b36dd | 385 | SCM_VALIDATE_OPINPORT (1,port); |
0f2d19dd JB |
386 | scm_cur_inp = port; |
387 | return oinp; | |
388 | } | |
1bbd0b84 | 389 | #undef FUNC_NAME |
0f2d19dd JB |
390 | |
391 | ||
3b3b36dd | 392 | SCM_DEFINE (scm_set_current_output_port, "set-current-output-port", 1, 0, 0, |
1bbd0b84 | 393 | (SCM port), |
b450f070 | 394 | "Set the current default output port to PORT.") |
1bbd0b84 | 395 | #define FUNC_NAME s_scm_set_current_output_port |
0f2d19dd JB |
396 | { |
397 | SCM ooutp = scm_cur_outp; | |
78446828 | 398 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 399 | SCM_VALIDATE_OPOUTPORT (1,port); |
0f2d19dd JB |
400 | scm_cur_outp = port; |
401 | return ooutp; | |
402 | } | |
1bbd0b84 | 403 | #undef FUNC_NAME |
0f2d19dd JB |
404 | |
405 | ||
3b3b36dd | 406 | SCM_DEFINE (scm_set_current_error_port, "set-current-error-port", 1, 0, 0, |
1bbd0b84 | 407 | (SCM port), |
b450f070 | 408 | "Set the current default error port to PORT.") |
1bbd0b84 | 409 | #define FUNC_NAME s_scm_set_current_error_port |
0f2d19dd JB |
410 | { |
411 | SCM oerrp = scm_cur_errp; | |
78446828 | 412 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 413 | SCM_VALIDATE_OPOUTPORT (1,port); |
0f2d19dd JB |
414 | scm_cur_errp = port; |
415 | return oerrp; | |
416 | } | |
1bbd0b84 | 417 | #undef FUNC_NAME |
0f2d19dd JB |
418 | |
419 | \f | |
840ae05d | 420 | /* The port table --- an array of pointers to ports. */ |
0f2d19dd | 421 | |
840ae05d | 422 | scm_port **scm_port_table; |
0f2d19dd JB |
423 | |
424 | int scm_port_table_size = 0; /* Number of ports in scm_port_table. */ | |
425 | int scm_port_table_room = 20; /* Size of the array. */ | |
426 | ||
ee149d03 | 427 | /* Add a port to the table. */ |
1cc91f1b | 428 | |
840ae05d | 429 | scm_port * |
a284e297 | 430 | scm_add_to_port_table (SCM port) |
0f2d19dd | 431 | { |
840ae05d JB |
432 | scm_port *entry; |
433 | ||
0f2d19dd JB |
434 | if (scm_port_table_size == scm_port_table_room) |
435 | { | |
ee149d03 | 436 | void *newt = realloc ((char *) scm_port_table, |
840ae05d | 437 | (scm_sizet) (sizeof (scm_port *) |
ee149d03 JB |
438 | * scm_port_table_room * 2)); |
439 | if (newt == NULL) | |
840ae05d JB |
440 | scm_memory_error ("scm_add_to_port_table"); |
441 | scm_port_table = (scm_port **) newt; | |
0f2d19dd JB |
442 | scm_port_table_room *= 2; |
443 | } | |
840ae05d JB |
444 | entry = (scm_port *) malloc (sizeof (scm_port)); |
445 | if (entry == NULL) | |
446 | scm_memory_error ("scm_add_to_port_table"); | |
447 | ||
448 | entry->port = port; | |
449 | entry->entry = scm_port_table_size; | |
450 | entry->revealed = 0; | |
451 | entry->stream = 0; | |
452 | entry->file_name = SCM_BOOL_F; | |
453 | entry->line_number = 0; | |
454 | entry->column_number = 0; | |
6c951427 GH |
455 | entry->putback_buf = 0; |
456 | entry->putback_buf_size = 0; | |
61e452ba | 457 | entry->rw_active = SCM_PORT_NEITHER; |
0de97b83 | 458 | entry->rw_random = 0; |
840ae05d JB |
459 | |
460 | scm_port_table[scm_port_table_size] = entry; | |
461 | scm_port_table_size++; | |
462 | ||
463 | return entry; | |
0f2d19dd JB |
464 | } |
465 | ||
6c951427 | 466 | /* Remove a port from the table and destroy it. */ |
1cc91f1b | 467 | |
0f2d19dd | 468 | void |
a284e297 | 469 | scm_remove_from_port_table (SCM port) |
0f2d19dd | 470 | { |
840ae05d | 471 | scm_port *p = SCM_PTAB_ENTRY (port); |
ee1e7e13 | 472 | int i = p->entry; |
6c951427 | 473 | |
ee1e7e13 MD |
474 | if (i >= scm_port_table_size) |
475 | scm_wta (port, "Port not in table", "scm_remove_from_port_table"); | |
6c951427 GH |
476 | if (p->putback_buf) |
477 | free (p->putback_buf); | |
840ae05d | 478 | free (p); |
ee1e7e13 MD |
479 | /* Since we have just freed slot i we can shrink the table by moving |
480 | the last entry to that slot... */ | |
481 | if (i < scm_port_table_size - 1) | |
0f2d19dd | 482 | { |
ee1e7e13 MD |
483 | scm_port_table[i] = scm_port_table[scm_port_table_size - 1]; |
484 | scm_port_table[i]->entry = i; | |
0f2d19dd | 485 | } |
0f2d19dd JB |
486 | SCM_SETPTAB_ENTRY (port, 0); |
487 | scm_port_table_size--; | |
488 | } | |
489 | ||
fea6b4ea | 490 | #ifdef GUILE_DEBUG |
b450f070 | 491 | /* Functions for debugging. */ |
1cc91f1b | 492 | |
3b3b36dd | 493 | SCM_DEFINE (scm_pt_size, "pt-size", 0, 0, 0, |
b450f070 GB |
494 | (), |
495 | "Returns the number of ports in the port table.\n" | |
496 | "`pt-size' is only included in GUILE_DEBUG builds.") | |
1bbd0b84 | 497 | #define FUNC_NAME s_scm_pt_size |
0f2d19dd JB |
498 | { |
499 | return SCM_MAKINUM (scm_port_table_size); | |
500 | } | |
1bbd0b84 | 501 | #undef FUNC_NAME |
0f2d19dd | 502 | |
3b3b36dd | 503 | SCM_DEFINE (scm_pt_member, "pt-member", 1, 0, 0, |
b450f070 GB |
504 | (SCM index), |
505 | "Returns the port at INDEX in the port table.\n" | |
506 | "`pt-member' is only included in GUILE_DEBUG builds.") | |
1bbd0b84 | 507 | #define FUNC_NAME s_scm_pt_member |
0f2d19dd JB |
508 | { |
509 | int i; | |
b450f070 | 510 | SCM_VALIDATE_INUM_COPY (1,index,i); |
0f2d19dd JB |
511 | if (i < 0 || i >= scm_port_table_size) |
512 | return SCM_BOOL_F; | |
513 | else | |
514 | return scm_port_table[i]->port; | |
515 | } | |
1bbd0b84 | 516 | #undef FUNC_NAME |
0f2d19dd JB |
517 | #endif |
518 | ||
70df8af6 GH |
519 | void |
520 | scm_port_non_buffer (scm_port *pt) | |
521 | { | |
522 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; | |
523 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
524 | pt->read_buf_size = pt->write_buf_size = 1; | |
525 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
526 | } | |
0f2d19dd | 527 | |
d68fee48 JB |
528 | \f |
529 | /* Revealed counts --- an oddity inherited from SCSH. */ | |
530 | ||
8b13c6b3 GH |
531 | /* Find a port in the table and return its revealed count. |
532 | Also used by the garbage collector. | |
0f2d19dd | 533 | */ |
1cc91f1b | 534 | |
0f2d19dd | 535 | int |
a284e297 | 536 | scm_revealed_count (SCM port) |
0f2d19dd JB |
537 | { |
538 | return SCM_REVEALED(port); | |
539 | } | |
540 | ||
541 | ||
542 | ||
543 | /* Return the revealed count for a port. */ | |
544 | ||
3b3b36dd | 545 | SCM_DEFINE (scm_port_revealed, "port-revealed", 1, 0, 0, |
1bbd0b84 | 546 | (SCM port), |
b380b885 | 547 | "Returns the revealed count for @var{port}.") |
1bbd0b84 | 548 | #define FUNC_NAME s_scm_port_revealed |
0f2d19dd | 549 | { |
78446828 | 550 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 551 | SCM_VALIDATE_PORT (1,port); |
8b13c6b3 | 552 | return SCM_MAKINUM (scm_revealed_count (port)); |
0f2d19dd | 553 | } |
1bbd0b84 | 554 | #undef FUNC_NAME |
0f2d19dd JB |
555 | |
556 | /* Set the revealed count for a port. */ | |
3b3b36dd | 557 | SCM_DEFINE (scm_set_port_revealed_x, "set-port-revealed!", 2, 0, 0, |
1bbd0b84 | 558 | (SCM port, SCM rcount), |
b450f070 | 559 | "Sets the revealed count for a port to a given value.\n" |
b380b885 | 560 | "The return value is unspecified.") |
1bbd0b84 | 561 | #define FUNC_NAME s_scm_set_port_revealed_x |
0f2d19dd | 562 | { |
78446828 | 563 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd GB |
564 | SCM_VALIDATE_PORT (1,port); |
565 | SCM_VALIDATE_INUM (2,rcount); | |
0f2d19dd | 566 | SCM_REVEALED (port) = SCM_INUM (rcount); |
8b13c6b3 | 567 | return SCM_UNSPECIFIED; |
0f2d19dd | 568 | } |
1bbd0b84 | 569 | #undef FUNC_NAME |
0f2d19dd | 570 | |
d68fee48 JB |
571 | |
572 | \f | |
573 | /* Retrieving a port's mode. */ | |
574 | ||
eadd48de GH |
575 | /* Return the flags that characterize a port based on the mode |
576 | * string used to open a file for that port. | |
577 | * | |
578 | * See PORT FLAGS in scm.h | |
579 | */ | |
580 | ||
581 | long | |
a284e297 | 582 | scm_mode_bits (char *modes) |
eadd48de GH |
583 | { |
584 | return (SCM_OPN | |
585 | | (strchr (modes, 'r') || strchr (modes, '+') ? SCM_RDNG : 0) | |
586 | | ( strchr (modes, 'w') | |
587 | || strchr (modes, 'a') | |
588 | || strchr (modes, '+') ? SCM_WRTNG : 0) | |
ee149d03 JB |
589 | | (strchr (modes, '0') ? SCM_BUF0 : 0) |
590 | | (strchr (modes, 'l') ? SCM_BUFLINE : 0)); | |
eadd48de GH |
591 | } |
592 | ||
593 | ||
594 | /* Return the mode flags from an open port. | |
595 | * Some modes such as "append" are only used when opening | |
596 | * a file and are not returned here. */ | |
597 | ||
3b3b36dd | 598 | SCM_DEFINE (scm_port_mode, "port-mode", 1, 0, 0, |
1bbd0b84 | 599 | (SCM port), |
b380b885 MD |
600 | "Returns the port modes associated with the open port @var{port}. These\n" |
601 | "will not necessarily be identical to the modes used when the port was\n" | |
602 | "opened, since modes such as \"append\" which are used only during\n" | |
603 | "port creation are not retained.") | |
1bbd0b84 | 604 | #define FUNC_NAME s_scm_port_mode |
eadd48de GH |
605 | { |
606 | char modes[3]; | |
607 | modes[0] = '\0'; | |
78446828 MV |
608 | |
609 | port = SCM_COERCE_OUTPORT (port); | |
3b3b36dd | 610 | SCM_VALIDATE_OPPORT (1,port); |
f9a64404 DH |
611 | if (SCM_CELL_WORD_0 (port) & SCM_RDNG) { |
612 | if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) | |
eadd48de GH |
613 | strcpy (modes, "r+"); |
614 | else | |
615 | strcpy (modes, "r"); | |
616 | } | |
f9a64404 | 617 | else if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) |
eadd48de | 618 | strcpy (modes, "w"); |
f9a64404 | 619 | if (SCM_CELL_WORD_0 (port) & SCM_BUF0) |
eadd48de GH |
620 | strcat (modes, "0"); |
621 | return scm_makfromstr (modes, strlen (modes), 0); | |
622 | } | |
1bbd0b84 | 623 | #undef FUNC_NAME |
eadd48de GH |
624 | |
625 | ||
d68fee48 JB |
626 | \f |
627 | /* Closing ports. */ | |
628 | ||
0f2d19dd JB |
629 | /* scm_close_port |
630 | * Call the close operation on a port object. | |
eadd48de | 631 | * see also scm_close. |
0f2d19dd | 632 | */ |
3b3b36dd | 633 | SCM_DEFINE (scm_close_port, "close-port", 1, 0, 0, |
1bbd0b84 | 634 | (SCM port), |
b380b885 MD |
635 | "Close the specified port object. Returns @code{#t} if it successfully\n" |
636 | "closes a port or @code{#f} if it was already\n" | |
637 | "closed. An exception may be raised if an error occurs, for example\n" | |
638 | "when flushing buffered output.\n" | |
639 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
640 | "which can close file descriptors.") | |
1bbd0b84 | 641 | #define FUNC_NAME s_scm_close_port |
0f2d19dd JB |
642 | { |
643 | scm_sizet i; | |
eadd48de GH |
644 | int rv; |
645 | ||
78446828 MV |
646 | port = SCM_COERCE_OUTPORT (port); |
647 | ||
7a754ca6 | 648 | SCM_VALIDATE_PORT (1, port); |
0f2d19dd | 649 | if (SCM_CLOSEDP (port)) |
eadd48de | 650 | return SCM_BOOL_F; |
0f2d19dd | 651 | i = SCM_PTOBNUM (port); |
affc96b5 GH |
652 | if (scm_ptobs[i].close) |
653 | rv = (scm_ptobs[i].close) (port); | |
eadd48de GH |
654 | else |
655 | rv = 0; | |
0f2d19dd | 656 | scm_remove_from_port_table (port); |
898a256f | 657 | SCM_SETAND_CAR (port, ~SCM_OPN); |
7a754ca6 MD |
658 | return SCM_NEGATE_BOOL (rv < 0); |
659 | } | |
660 | #undef FUNC_NAME | |
661 | ||
662 | SCM_DEFINE (scm_close_input_port, "close-input-port", 1, 0, 0, | |
663 | (SCM port), | |
664 | "Close the specified input port object. The routine has no effect if\n" | |
665 | "the file has already been closed. An exception may be raised if an\n" | |
666 | "error occurs. The value returned is unspecified.\n\n" | |
667 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
668 | "which can close file descriptors.") | |
669 | #define FUNC_NAME s_scm_close_input_port | |
670 | { | |
671 | SCM_VALIDATE_INPUT_PORT (1, port); | |
672 | scm_close_port (port); | |
673 | return SCM_UNSPECIFIED; | |
674 | } | |
675 | #undef FUNC_NAME | |
676 | ||
677 | SCM_DEFINE (scm_close_output_port, "close-output-port", 1, 0, 0, | |
678 | (SCM port), | |
679 | "Close the specified output port object. The routine has no effect if\n" | |
680 | "the file has already been closed. An exception may be raised if an\n" | |
681 | "error occurs. The value returned is unspecified.\n\n" | |
682 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
683 | "which can close file descriptors.") | |
684 | #define FUNC_NAME s_scm_close_output_port | |
685 | { | |
686 | port = SCM_COERCE_OUTPORT (port); | |
687 | SCM_VALIDATE_OUTPUT_PORT (1, port); | |
688 | scm_close_port (port); | |
689 | return SCM_UNSPECIFIED; | |
0f2d19dd | 690 | } |
1bbd0b84 | 691 | #undef FUNC_NAME |
0f2d19dd | 692 | |
c2ca4493 GH |
693 | SCM_DEFINE (scm_port_for_each, "port-for-each", 1, 0, 0, |
694 | (SCM proc), | |
695 | "Apply @var{proc} to each port in the Guile port table\n" | |
696 | "in turn. The return value is unspecified.") | |
697 | #define FUNC_NAME s_scm_port_for_each | |
698 | { | |
699 | int i; | |
700 | SCM_VALIDATE_PROC (1, proc); | |
701 | ||
702 | /* when pre-emptive multithreading is supported, access to the port | |
703 | table will need to be controlled by a mutex. */ | |
704 | SCM_DEFER_INTS; | |
705 | for (i = 0; i < scm_port_table_size; i++) | |
706 | { | |
707 | scm_apply (proc, scm_cons (scm_port_table[i]->port, SCM_EOL), SCM_EOL); | |
708 | } | |
709 | return SCM_UNSPECIFIED; | |
710 | } | |
711 | #undef FUNC_NAME | |
712 | ||
b875c468 GH |
713 | #if (SCM_DEBUG_DEPRECATED == 0) |
714 | ||
3b3b36dd | 715 | SCM_DEFINE (scm_close_all_ports_except, "close-all-ports-except", 0, 0, 1, |
1bbd0b84 | 716 | (SCM ports), |
b875c468 | 717 | "[DEPRECATED] Close all open file ports used by the interpreter\n" |
b380b885 | 718 | "except for those supplied as arguments. This procedure\n" |
b875c468 GH |
719 | "was intended to be used before an exec call to close file descriptors\n" |
720 | "which are not needed in the new process. However it has the\n" | |
721 | "undesirable side-effect of flushing buffes, so it's deprecated.\n" | |
722 | "Use port-for-each instead.") | |
1bbd0b84 | 723 | #define FUNC_NAME s_scm_close_all_ports_except |
0f2d19dd JB |
724 | { |
725 | int i = 0; | |
af45e3b0 | 726 | SCM_VALIDATE_REST_ARGUMENT (ports); |
0f2d19dd JB |
727 | while (i < scm_port_table_size) |
728 | { | |
729 | SCM thisport = scm_port_table[i]->port; | |
730 | int found = 0; | |
731 | SCM ports_ptr = ports; | |
732 | ||
733 | while (SCM_NNULLP (ports_ptr)) | |
734 | { | |
78446828 | 735 | SCM port = SCM_COERCE_OUTPORT (SCM_CAR (ports_ptr)); |
0f2d19dd | 736 | if (i == 0) |
3b3b36dd | 737 | SCM_VALIDATE_OPPORT (SCM_ARG1,port); |
54778cd3 | 738 | if (SCM_EQ_P (port, thisport)) |
0f2d19dd JB |
739 | found = 1; |
740 | ports_ptr = SCM_CDR (ports_ptr); | |
741 | } | |
742 | if (found) | |
743 | i++; | |
744 | else | |
745 | /* i is not to be incremented here. */ | |
746 | scm_close_port (thisport); | |
747 | } | |
0f2d19dd JB |
748 | return SCM_UNSPECIFIED; |
749 | } | |
1bbd0b84 | 750 | #undef FUNC_NAME |
0f2d19dd | 751 | |
b875c468 | 752 | #endif |
d68fee48 JB |
753 | |
754 | \f | |
755 | /* Utter miscellany. Gosh, we should clean this up some time. */ | |
756 | ||
3b3b36dd | 757 | SCM_DEFINE (scm_input_port_p, "input-port?", 1, 0, 0, |
1bbd0b84 | 758 | (SCM x), |
bfc46627 GB |
759 | "Returns @code{#t} if @var{x} is an input port, otherwise returns\n" |
760 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
761 | "@code{port?}.") | |
1bbd0b84 | 762 | #define FUNC_NAME s_scm_input_port_p |
0f2d19dd JB |
763 | { |
764 | if (SCM_IMP (x)) | |
4a94d8ca | 765 | return SCM_BOOL_F; |
f5f2dcff | 766 | return SCM_BOOL(SCM_INPUT_PORT_P (x)); |
0f2d19dd | 767 | } |
1bbd0b84 | 768 | #undef FUNC_NAME |
0f2d19dd | 769 | |
3b3b36dd | 770 | SCM_DEFINE (scm_output_port_p, "output-port?", 1, 0, 0, |
1bbd0b84 | 771 | (SCM x), |
bfc46627 GB |
772 | "Returns @code{#t} if @var{x} is an output port, otherwise returns\n" |
773 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
774 | "@code{port?}.") | |
1bbd0b84 | 775 | #define FUNC_NAME s_scm_output_port_p |
0f2d19dd JB |
776 | { |
777 | if (SCM_IMP (x)) | |
4a94d8ca MD |
778 | return SCM_BOOL_F; |
779 | if (SCM_PORT_WITH_PS_P (x)) | |
780 | x = SCM_PORT_WITH_PS_PORT (x); | |
f5f2dcff | 781 | return SCM_BOOL(SCM_OUTPUT_PORT_P (x)); |
0f2d19dd | 782 | } |
1bbd0b84 | 783 | #undef FUNC_NAME |
0f2d19dd | 784 | |
eb5c0a2a GH |
785 | SCM_DEFINE (scm_port_p, "port?", 1, 0, 0, |
786 | (SCM x), | |
787 | "Returns a boolean indicating whether @var{x} is a port.\n" | |
788 | "Equivalent to @code{(or (input-port? X) (output-port? X))}.") | |
789 | #define FUNC_NAME s_scm_port_p | |
790 | { | |
791 | return SCM_BOOL (SCM_PORTP (x)); | |
792 | } | |
793 | #undef FUNC_NAME | |
794 | ||
3b3b36dd | 795 | SCM_DEFINE (scm_port_closed_p, "port-closed?", 1, 0, 0, |
1bbd0b84 | 796 | (SCM port), |
b380b885 | 797 | "Returns @code{#t} if @var{port} is closed or @code{#f} if it is open.") |
1bbd0b84 | 798 | #define FUNC_NAME s_scm_port_closed_p |
60d0643d | 799 | { |
c1bfcf60 | 800 | SCM_VALIDATE_PORT (1,port); |
1bbd0b84 | 801 | return SCM_NEGATE_BOOL(SCM_OPPORTP (port)); |
60d0643d | 802 | } |
1bbd0b84 | 803 | #undef FUNC_NAME |
0f2d19dd | 804 | |
3b3b36dd | 805 | SCM_DEFINE (scm_eof_object_p, "eof-object?", 1, 0, 0, |
1bbd0b84 | 806 | (SCM x), |
bfc46627 GB |
807 | "Returns @code{#t} if @var{x} is an end-of-file object; otherwise\n" |
808 | "returns @code{#f}.") | |
1bbd0b84 | 809 | #define FUNC_NAME s_scm_eof_object_p |
0f2d19dd | 810 | { |
1bbd0b84 | 811 | return SCM_BOOL(SCM_EOF_OBJECT_P (x)); |
0f2d19dd | 812 | } |
1bbd0b84 | 813 | #undef FUNC_NAME |
0f2d19dd | 814 | |
3b3b36dd | 815 | SCM_DEFINE (scm_force_output, "force-output", 0, 1, 0, |
1bbd0b84 | 816 | (SCM port), |
b380b885 MD |
817 | "Flush the specified output port, or the current output port if @var{port}\n" |
818 | "is omitted. The current output buffer contents are passed to the \n" | |
819 | "underlying port implementation (e.g., in the case of fports, the\n" | |
820 | "data will be written to the file and the output buffer will be cleared.)\n" | |
821 | "It has no effect on an unbuffered port.\n\n" | |
822 | "The return value is unspecified.") | |
1bbd0b84 | 823 | #define FUNC_NAME s_scm_force_output |
0f2d19dd JB |
824 | { |
825 | if (SCM_UNBNDP (port)) | |
3e877d15 | 826 | port = scm_cur_outp; |
0f2d19dd | 827 | else |
78446828 MV |
828 | { |
829 | port = SCM_COERCE_OUTPORT (port); | |
3b3b36dd | 830 | SCM_VALIDATE_OPOUTPORT (1,port); |
78446828 | 831 | } |
affc96b5 | 832 | scm_flush (port); |
ee149d03 | 833 | return SCM_UNSPECIFIED; |
0f2d19dd | 834 | } |
1bbd0b84 | 835 | #undef FUNC_NAME |
0f2d19dd | 836 | |
a1ec6916 | 837 | SCM_DEFINE (scm_flush_all_ports, "flush-all-ports", 0, 0, 0, |
1bbd0b84 | 838 | (), |
b380b885 MD |
839 | "Equivalent to calling @code{force-output} on\n" |
840 | "all open output ports. The return value is unspecified.") | |
1bbd0b84 | 841 | #define FUNC_NAME s_scm_flush_all_ports |
89ea5b7c GH |
842 | { |
843 | int i; | |
844 | ||
845 | for (i = 0; i < scm_port_table_size; i++) | |
846 | { | |
ee149d03 | 847 | if (SCM_OPOUTPORTP (scm_port_table[i]->port)) |
affc96b5 | 848 | scm_flush (scm_port_table[i]->port); |
89ea5b7c GH |
849 | } |
850 | return SCM_UNSPECIFIED; | |
851 | } | |
1bbd0b84 | 852 | #undef FUNC_NAME |
0f2d19dd | 853 | |
3b3b36dd | 854 | SCM_DEFINE (scm_read_char, "read-char", 0, 1, 0, |
1bbd0b84 | 855 | (SCM port), |
bfc46627 GB |
856 | "Returns the next character available from @var{port}, updating\n" |
857 | "@var{port} to point to the following character. If no more\n" | |
858 | "characters are available, an end-of-file object is returned.") | |
1bbd0b84 | 859 | #define FUNC_NAME s_scm_read_char |
0f2d19dd JB |
860 | { |
861 | int c; | |
862 | if (SCM_UNBNDP (port)) | |
334341aa | 863 | port = scm_cur_inp; |
3b3b36dd | 864 | SCM_VALIDATE_OPINPORT (1,port); |
b7f3516f | 865 | c = scm_getc (port); |
0f2d19dd JB |
866 | if (EOF == c) |
867 | return SCM_EOF_VAL; | |
7866a09b | 868 | return SCM_MAKE_CHAR (c); |
0f2d19dd | 869 | } |
1bbd0b84 | 870 | #undef FUNC_NAME |
0f2d19dd | 871 | |
5c070ca7 | 872 | /* this should only be called when the read buffer is empty. it |
affc96b5 | 873 | tries to refill the read buffer. it returns the first char from |
5c070ca7 | 874 | the port, which is either EOF or *(pt->read_pos). */ |
6c951427 | 875 | int |
affc96b5 | 876 | scm_fill_input (SCM port) |
6c951427 | 877 | { |
283a1a0e GH |
878 | scm_port *pt = SCM_PTAB_ENTRY (port); |
879 | ||
6c951427 GH |
880 | if (pt->read_buf == pt->putback_buf) |
881 | { | |
882 | /* finished reading put-back chars. */ | |
883 | pt->read_buf = pt->saved_read_buf; | |
884 | pt->read_pos = pt->saved_read_pos; | |
885 | pt->read_end = pt->saved_read_end; | |
886 | pt->read_buf_size = pt->saved_read_buf_size; | |
887 | if (pt->read_pos < pt->read_end) | |
5c070ca7 | 888 | return *(pt->read_pos); |
6c951427 | 889 | } |
affc96b5 | 890 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
6c951427 GH |
891 | } |
892 | ||
ee149d03 | 893 | int |
a284e297 | 894 | scm_getc (SCM port) |
0f2d19dd JB |
895 | { |
896 | int c; | |
840ae05d | 897 | scm_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 | 898 | |
840ae05d JB |
899 | if (pt->rw_active == SCM_PORT_WRITE) |
900 | { | |
affc96b5 GH |
901 | /* may be marginally faster than calling scm_flush. */ |
902 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
840ae05d | 903 | } |
6c951427 | 904 | |
5c070ca7 GH |
905 | if (pt->rw_random) |
906 | pt->rw_active = SCM_PORT_READ; | |
907 | ||
908 | if (pt->read_pos >= pt->read_end) | |
ee149d03 | 909 | { |
affc96b5 | 910 | if (scm_fill_input (port) == EOF) |
5c070ca7 | 911 | return EOF; |
ee149d03 JB |
912 | } |
913 | ||
5c070ca7 | 914 | c = *(pt->read_pos++); |
840ae05d | 915 | |
ee149d03 JB |
916 | if (c == '\n') |
917 | { | |
918 | SCM_INCLINE (port); | |
919 | } | |
920 | else if (c == '\t') | |
921 | { | |
922 | SCM_TABCOL (port); | |
923 | } | |
924 | else | |
925 | { | |
926 | SCM_INCCOL (port); | |
927 | } | |
928 | ||
929 | return c; | |
0f2d19dd JB |
930 | } |
931 | ||
ee149d03 | 932 | void |
a284e297 | 933 | scm_putc (char c, SCM port) |
ee149d03 | 934 | { |
265e6a4d | 935 | scm_lfwrite (&c, 1, port); |
ee149d03 | 936 | } |
3cb988bd | 937 | |
ee149d03 | 938 | void |
70d63753 | 939 | scm_puts (const char *s, SCM port) |
3cb988bd | 940 | { |
265e6a4d | 941 | scm_lfwrite (s, strlen (s), port); |
ee149d03 | 942 | } |
3cb988bd | 943 | |
ee149d03 | 944 | void |
70d63753 | 945 | scm_lfwrite (const char *ptr, scm_sizet size, SCM port) |
ee149d03 | 946 | { |
840ae05d | 947 | scm_port *pt = SCM_PTAB_ENTRY (port); |
f12733c9 | 948 | scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
3e2043c4 | 949 | |
840ae05d | 950 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 951 | scm_end_input (port); |
283a1a0e | 952 | |
31703ab8 | 953 | ptob->write (port, ptr, size); |
840ae05d JB |
954 | |
955 | if (pt->rw_random) | |
956 | pt->rw_active = SCM_PORT_WRITE; | |
ee149d03 | 957 | } |
3cb988bd | 958 | |
3cb988bd | 959 | |
ee149d03 | 960 | void |
a284e297 | 961 | scm_flush (SCM port) |
ee149d03 JB |
962 | { |
963 | scm_sizet i = SCM_PTOBNUM (port); | |
affc96b5 | 964 | (scm_ptobs[i].flush) (port); |
ee149d03 JB |
965 | } |
966 | ||
283a1a0e | 967 | void |
a284e297 | 968 | scm_end_input (SCM port) |
283a1a0e GH |
969 | { |
970 | int offset; | |
971 | scm_port *pt = SCM_PTAB_ENTRY (port); | |
972 | ||
973 | if (pt->read_buf == pt->putback_buf) | |
974 | { | |
975 | offset = pt->read_end - pt->read_pos; | |
976 | pt->read_buf = pt->saved_read_buf; | |
977 | pt->read_pos = pt->saved_read_pos; | |
978 | pt->read_end = pt->saved_read_end; | |
979 | pt->read_buf_size = pt->saved_read_buf_size; | |
980 | } | |
981 | else | |
982 | offset = 0; | |
983 | ||
affc96b5 | 984 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
283a1a0e GH |
985 | } |
986 | ||
ee149d03 JB |
987 | \f |
988 | ||
989 | ||
990 | void | |
a284e297 | 991 | scm_ungetc (int c, SCM port) |
ee149d03 | 992 | { |
840ae05d JB |
993 | scm_port *pt = SCM_PTAB_ENTRY (port); |
994 | ||
6c951427 GH |
995 | if (pt->read_buf == pt->putback_buf) |
996 | /* already using the put-back buffer. */ | |
997 | { | |
998 | /* enlarge putback_buf if necessary. */ | |
999 | if (pt->read_end == pt->read_buf + pt->read_buf_size | |
1000 | && pt->read_buf == pt->read_pos) | |
1001 | { | |
1002 | int new_size = pt->read_buf_size * 2; | |
1003 | unsigned char *tmp = | |
1004 | (unsigned char *) realloc (pt->putback_buf, new_size); | |
1005 | ||
1006 | if (tmp == NULL) | |
1007 | scm_memory_error ("scm_ungetc"); | |
1008 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; | |
1009 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
1010 | pt->read_buf_size = pt->putback_buf_size = new_size; | |
1011 | } | |
1012 | ||
1013 | /* shift any existing bytes to buffer + 1. */ | |
1014 | if (pt->read_pos == pt->read_end) | |
1015 | pt->read_end = pt->read_buf + 1; | |
1016 | else if (pt->read_pos != pt->read_buf + 1) | |
1017 | { | |
1018 | int count = pt->read_end - pt->read_pos; | |
1019 | ||
1020 | memmove (pt->read_buf + 1, pt->read_pos, count); | |
1021 | pt->read_end = pt->read_buf + 1 + count; | |
1022 | } | |
1023 | ||
1024 | pt->read_pos = pt->read_buf; | |
1025 | } | |
1026 | else | |
1027 | /* switch to the put-back buffer. */ | |
1028 | { | |
1029 | if (pt->putback_buf == NULL) | |
1030 | { | |
c357d546 MD |
1031 | pt->putback_buf |
1032 | = (unsigned char *) malloc (SCM_INITIAL_PUTBACK_BUF_SIZE); | |
6c951427 GH |
1033 | if (pt->putback_buf == NULL) |
1034 | scm_memory_error ("scm_ungetc"); | |
1035 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; | |
1036 | } | |
1037 | ||
1038 | pt->saved_read_buf = pt->read_buf; | |
1039 | pt->saved_read_pos = pt->read_pos; | |
1040 | pt->saved_read_end = pt->read_end; | |
1041 | pt->saved_read_buf_size = pt->read_buf_size; | |
1042 | ||
1043 | pt->read_pos = pt->read_buf = pt->putback_buf; | |
1044 | pt->read_end = pt->read_buf + 1; | |
1045 | pt->read_buf_size = pt->putback_buf_size; | |
1046 | } | |
1047 | ||
1048 | *pt->read_buf = c; | |
ee149d03 | 1049 | |
840ae05d JB |
1050 | if (pt->rw_random) |
1051 | pt->rw_active = SCM_PORT_READ; | |
1052 | ||
ee149d03 JB |
1053 | if (c == '\n') |
1054 | { | |
1055 | /* What should col be in this case? | |
1056 | * We'll leave it at -1. | |
1057 | */ | |
1058 | SCM_LINUM (port) -= 1; | |
1059 | } | |
1060 | else | |
1061 | SCM_COL(port) -= 1; | |
1062 | } | |
1063 | ||
1064 | ||
1065 | void | |
70d63753 | 1066 | scm_ungets (const char *s, int n, SCM port) |
ee149d03 JB |
1067 | { |
1068 | /* This is simple minded and inefficient, but unreading strings is | |
1069 | * probably not a common operation, and remember that line and | |
1070 | * column numbers have to be handled... | |
1071 | * | |
1072 | * Please feel free to write an optimized version! | |
1073 | */ | |
1074 | while (n--) | |
1075 | scm_ungetc (s[n], port); | |
1076 | } | |
1077 | ||
1078 | ||
3b3b36dd | 1079 | SCM_DEFINE (scm_peek_char, "peek-char", 0, 1, 0, |
1bbd0b84 | 1080 | (SCM port), |
bfc46627 GB |
1081 | "Returns the next character available from @var{port},\n" |
1082 | "@emph{without} updating @var{port} to point to the following\n" | |
1083 | "character. If no more characters are available, an end-of-file object\n" | |
1084 | "is returned.@footnote{The value returned by a call to @code{peek-char}\n" | |
1085 | "is the same as the value that would have been returned by a call to\n" | |
1086 | "@code{read-char} on the same port. The only difference is that the very\n" | |
1087 | "next call to @code{read-char} or @code{peek-char} on that\n" | |
1088 | "@var{port} will return the value returned by the preceding call to\n" | |
1089 | "@code{peek-char}. In particular, a call to @code{peek-char} on an\n" | |
1090 | "interactive port will hang waiting for input whenever a call to\n" | |
1091 | "@code{read-char} would have hung.}") | |
1bbd0b84 | 1092 | #define FUNC_NAME s_scm_peek_char |
ee149d03 JB |
1093 | { |
1094 | int c; | |
1095 | if (SCM_UNBNDP (port)) | |
1096 | port = scm_cur_inp; | |
1097 | else | |
3b3b36dd | 1098 | SCM_VALIDATE_OPINPORT (1,port); |
ee149d03 JB |
1099 | c = scm_getc (port); |
1100 | if (EOF == c) | |
1101 | return SCM_EOF_VAL; | |
1102 | scm_ungetc (c, port); | |
7866a09b | 1103 | return SCM_MAKE_CHAR (c); |
3cb988bd | 1104 | } |
1bbd0b84 | 1105 | #undef FUNC_NAME |
3cb988bd | 1106 | |
a1ec6916 | 1107 | SCM_DEFINE (scm_unread_char, "unread-char", 2, 0, 0, |
1bbd0b84 | 1108 | (SCM cobj, SCM port), |
b380b885 MD |
1109 | "Place @var{char} in @var{port} so that it will be read by the\n" |
1110 | "next read operation. If called multiple times, the unread characters\n" | |
1111 | "will be read again in last-in first-out order. If @var{port} is\n" | |
1112 | "not supplied, the current input port is used.") | |
1bbd0b84 | 1113 | #define FUNC_NAME s_scm_unread_char |
0f2d19dd JB |
1114 | { |
1115 | int c; | |
1116 | ||
7866a09b | 1117 | SCM_VALIDATE_CHAR (1,cobj); |
0f2d19dd JB |
1118 | if (SCM_UNBNDP (port)) |
1119 | port = scm_cur_inp; | |
1120 | else | |
3b3b36dd | 1121 | SCM_VALIDATE_OPINPORT (2,port); |
0f2d19dd | 1122 | |
7866a09b | 1123 | c = SCM_CHAR (cobj); |
0f2d19dd | 1124 | |
b7f3516f | 1125 | scm_ungetc (c, port); |
0f2d19dd JB |
1126 | return cobj; |
1127 | } | |
1bbd0b84 | 1128 | #undef FUNC_NAME |
0f2d19dd | 1129 | |
a1ec6916 | 1130 | SCM_DEFINE (scm_unread_string, "unread-string", 2, 0, 0, |
1bbd0b84 | 1131 | (SCM str, SCM port), |
b380b885 MD |
1132 | "Place the string @var{str} in @var{port} so that its characters will be\n" |
1133 | "read in subsequent read operations. If called multiple times, the\n" | |
1134 | "unread characters will be read again in last-in first-out order. If\n" | |
1135 | "@var{port} is not supplied, the current-input-port is used.") | |
1bbd0b84 | 1136 | #define FUNC_NAME s_scm_unread_string |
ee1e7e13 | 1137 | { |
3b3b36dd | 1138 | SCM_VALIDATE_STRING (1,str); |
ee1e7e13 MD |
1139 | if (SCM_UNBNDP (port)) |
1140 | port = scm_cur_inp; | |
1141 | else | |
3b3b36dd | 1142 | SCM_VALIDATE_OPINPORT (2,port); |
ee1e7e13 | 1143 | |
34f0f2b8 | 1144 | scm_ungets (SCM_STRING_CHARS (str), SCM_STRING_LENGTH (str), port); |
ee1e7e13 MD |
1145 | |
1146 | return str; | |
1147 | } | |
1bbd0b84 | 1148 | #undef FUNC_NAME |
ee1e7e13 | 1149 | |
a1ec6916 | 1150 | SCM_DEFINE (scm_seek, "seek", 3, 0, 0, |
1bbd0b84 | 1151 | (SCM object, SCM offset, SCM whence), |
b380b885 MD |
1152 | "Sets the current position of @var{fd/port} to the integer @var{offset},\n" |
1153 | "which is interpreted according to the value of @var{whence}.\n\n" | |
1154 | "One of the following variables should be supplied\n" | |
1155 | "for @var{whence}:\n" | |
1156 | "@defvar SEEK_SET\n" | |
1157 | "Seek from the beginning of the file.\n" | |
1158 | "@end defvar\n" | |
1159 | "@defvar SEEK_CUR\n" | |
1160 | "Seek from the current position.\n" | |
1161 | "@end defvar\n" | |
1162 | "@defvar SEEK_END\n" | |
1163 | "Seek from the end of the file.\n" | |
1164 | "@end defvar\n\n" | |
1165 | "If @var{fd/port} is a file descriptor, the underlying system call is\n" | |
1166 | "@code{lseek}. @var{port} may be a string port.\n\n" | |
1167 | "The value returned is the new position in the file. This means that\n" | |
1168 | "the current position of a port can be obtained using:\n" | |
1169 | "@smalllisp\n" | |
1170 | "(seek port 0 SEEK_CUR)\n" | |
1171 | "@end smalllisp") | |
1bbd0b84 | 1172 | #define FUNC_NAME s_scm_seek |
840ae05d JB |
1173 | { |
1174 | off_t off; | |
1175 | off_t rv; | |
1176 | int how; | |
1177 | ||
1178 | object = SCM_COERCE_OUTPORT (object); | |
1179 | ||
1bbd0b84 | 1180 | off = SCM_NUM2LONG (2,offset); |
3b3b36dd | 1181 | SCM_VALIDATE_INUM_COPY (3,whence,how); |
840ae05d | 1182 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) |
1bbd0b84 | 1183 | SCM_OUT_OF_RANGE (3, whence); |
0c95b57d | 1184 | if (SCM_OPPORTP (object)) |
840ae05d | 1185 | { |
f12733c9 | 1186 | scm_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); |
840ae05d JB |
1187 | |
1188 | if (!ptob->seek) | |
1bbd0b84 GB |
1189 | SCM_MISC_ERROR ("port is not seekable", |
1190 | scm_cons (object, SCM_EOL)); | |
840ae05d | 1191 | else |
7dcb364d | 1192 | rv = ptob->seek (object, off, how); |
840ae05d JB |
1193 | } |
1194 | else /* file descriptor?. */ | |
1195 | { | |
3b3b36dd | 1196 | SCM_VALIDATE_INUM (1,object); |
840ae05d JB |
1197 | rv = lseek (SCM_INUM (object), off, how); |
1198 | if (rv == -1) | |
1bbd0b84 | 1199 | SCM_SYSERROR; |
840ae05d JB |
1200 | } |
1201 | return scm_long2num (rv); | |
1202 | } | |
1bbd0b84 | 1203 | #undef FUNC_NAME |
840ae05d | 1204 | |
a1ec6916 | 1205 | SCM_DEFINE (scm_truncate_file, "truncate-file", 1, 1, 0, |
1bbd0b84 | 1206 | (SCM object, SCM length), |
b380b885 MD |
1207 | "Truncates the object referred to by @var{obj} to at most @var{size} bytes.\n" |
1208 | "@var{obj} can be a string containing a file name or an integer file\n" | |
1209 | "descriptor or a port. @var{size} may be omitted if @var{obj} is not\n" | |
1210 | "a file name, in which case the truncation occurs at the current port.\n" | |
1211 | "position.\n\n" | |
1212 | "The return value is unspecified.") | |
1bbd0b84 | 1213 | #define FUNC_NAME s_scm_truncate_file |
840ae05d | 1214 | { |
69bc9ff3 GH |
1215 | int rv; |
1216 | off_t c_length; | |
1217 | ||
1218 | /* object can be a port, fdes or filename. */ | |
840ae05d | 1219 | |
840ae05d JB |
1220 | if (SCM_UNBNDP (length)) |
1221 | { | |
69bc9ff3 | 1222 | /* must supply length if object is a filename. */ |
a6d9e5ab | 1223 | if (SCM_STRINGP (object)) |
c1bfcf60 | 1224 | SCM_MISC_ERROR("must supply length if OBJECT is a filename",SCM_EOL); |
69bc9ff3 | 1225 | |
c94577b4 | 1226 | length = scm_seek (object, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); |
840ae05d | 1227 | } |
1bbd0b84 | 1228 | c_length = SCM_NUM2LONG (2,length); |
69bc9ff3 | 1229 | if (c_length < 0) |
1bbd0b84 | 1230 | SCM_MISC_ERROR ("negative offset", SCM_EOL); |
3fe6190f | 1231 | |
69bc9ff3 GH |
1232 | object = SCM_COERCE_OUTPORT (object); |
1233 | if (SCM_INUMP (object)) | |
1234 | { | |
1235 | SCM_SYSCALL (rv = ftruncate (SCM_INUM (object), c_length)); | |
1236 | } | |
0c95b57d | 1237 | else if (SCM_OPOUTPORTP (object)) |
69bc9ff3 GH |
1238 | { |
1239 | scm_port *pt = SCM_PTAB_ENTRY (object); | |
f12733c9 | 1240 | scm_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); |
69bc9ff3 | 1241 | |
affc96b5 | 1242 | if (!ptob->truncate) |
1bbd0b84 | 1243 | SCM_MISC_ERROR ("port is not truncatable", SCM_EOL); |
69bc9ff3 | 1244 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1245 | scm_end_input (object); |
69bc9ff3 | 1246 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1247 | ptob->flush (object); |
69bc9ff3 | 1248 | |
affc96b5 | 1249 | ptob->truncate (object, c_length); |
69bc9ff3 GH |
1250 | rv = 0; |
1251 | } | |
1252 | else | |
1253 | { | |
a6d9e5ab DH |
1254 | SCM_VALIDATE_STRING (1, object); |
1255 | SCM_STRING_COERCE_0TERMINATION_X (object); | |
1256 | SCM_SYSCALL (rv = truncate (SCM_STRING_CHARS (object), c_length)); | |
69bc9ff3 GH |
1257 | } |
1258 | if (rv == -1) | |
1bbd0b84 | 1259 | SCM_SYSERROR; |
840ae05d JB |
1260 | return SCM_UNSPECIFIED; |
1261 | } | |
1bbd0b84 | 1262 | #undef FUNC_NAME |
840ae05d | 1263 | |
a1ec6916 | 1264 | SCM_DEFINE (scm_port_line, "port-line", 1, 0, 0, |
1bbd0b84 | 1265 | (SCM port), |
b450f070 | 1266 | "Return the current line number for PORT.") |
1bbd0b84 | 1267 | #define FUNC_NAME s_scm_port_line |
0f2d19dd | 1268 | { |
78446828 | 1269 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 1270 | SCM_VALIDATE_OPENPORT (1,port); |
360fc44c | 1271 | return SCM_MAKINUM (SCM_LINUM (port)); |
0f2d19dd | 1272 | } |
1bbd0b84 | 1273 | #undef FUNC_NAME |
0f2d19dd | 1274 | |
a1ec6916 | 1275 | SCM_DEFINE (scm_set_port_line_x, "set-port-line!", 2, 0, 0, |
1bbd0b84 | 1276 | (SCM port, SCM line), |
b450f070 | 1277 | "Set the current line number for PORT to LINE.") |
1bbd0b84 | 1278 | #define FUNC_NAME s_scm_set_port_line_x |
d043d8c2 | 1279 | { |
360fc44c | 1280 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd GB |
1281 | SCM_VALIDATE_OPENPORT (1,port); |
1282 | SCM_VALIDATE_INUM (2,line); | |
564478fd GB |
1283 | SCM_PTAB_ENTRY (port)->line_number = SCM_INUM (line); |
1284 | return SCM_UNSPECIFIED; | |
d043d8c2 | 1285 | } |
1bbd0b84 | 1286 | #undef FUNC_NAME |
d043d8c2 | 1287 | |
a1ec6916 | 1288 | SCM_DEFINE (scm_port_column, "port-column", 1, 0, 0, |
1bbd0b84 | 1289 | (SCM port), |
b380b885 MD |
1290 | "@deffnx primitive port-line [input-port]\n" |
1291 | "Return the current column number or line number of @var{input-port},\n" | |
1292 | "using the current input port if none is specified. If the number is\n" | |
1293 | "unknown, the result is #f. Otherwise, the result is a 0-origin integer\n" | |
1294 | "- i.e. the first character of the first line is line 0, column 0.\n" | |
1295 | "(However, when you display a file position, for example in an error\n" | |
1296 | "message, we recommand you add 1 to get 1-origin integers. This is\n" | |
1297 | "because lines and column numbers traditionally start with 1, and that is\n" | |
1298 | "what non-programmers will find most natural.)") | |
1bbd0b84 | 1299 | #define FUNC_NAME s_scm_port_column |
0f2d19dd | 1300 | { |
78446828 | 1301 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 1302 | SCM_VALIDATE_OPENPORT (1,port); |
360fc44c | 1303 | return SCM_MAKINUM (SCM_COL (port)); |
0f2d19dd | 1304 | } |
1bbd0b84 | 1305 | #undef FUNC_NAME |
0f2d19dd | 1306 | |
a1ec6916 | 1307 | SCM_DEFINE (scm_set_port_column_x, "set-port-column!", 2, 0, 0, |
1bbd0b84 | 1308 | (SCM port, SCM column), |
92ccc1f1 NJ |
1309 | "@deffnx primitive set-port-line! port line\n" |
1310 | "Set the current column or line number of @var{port}, using the\n" | |
b380b885 | 1311 | "current input port if none is specified.") |
1bbd0b84 | 1312 | #define FUNC_NAME s_scm_set_port_column_x |
d043d8c2 | 1313 | { |
360fc44c | 1314 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd GB |
1315 | SCM_VALIDATE_OPENPORT (1,port); |
1316 | SCM_VALIDATE_INUM (2,column); | |
564478fd GB |
1317 | SCM_PTAB_ENTRY (port)->column_number = SCM_INUM (column); |
1318 | return SCM_UNSPECIFIED; | |
d043d8c2 | 1319 | } |
1bbd0b84 | 1320 | #undef FUNC_NAME |
d043d8c2 | 1321 | |
a1ec6916 | 1322 | SCM_DEFINE (scm_port_filename, "port-filename", 1, 0, 0, |
1bbd0b84 | 1323 | (SCM port), |
b380b885 | 1324 | "Return the filename associated with @var{port}. This function returns\n" |
2a2a730b | 1325 | "the strings \"standard input\", \"standard output\" and \"standard error\"\n" |
a3c8b9fc | 1326 | "when called on the current input, output and error ports respectively.") |
1bbd0b84 | 1327 | #define FUNC_NAME s_scm_port_filename |
0f2d19dd | 1328 | { |
78446828 | 1329 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 1330 | SCM_VALIDATE_OPENPORT (1,port); |
b24b5e13 | 1331 | return SCM_FILENAME (port); |
0f2d19dd | 1332 | } |
1bbd0b84 | 1333 | #undef FUNC_NAME |
0f2d19dd | 1334 | |
a1ec6916 | 1335 | SCM_DEFINE (scm_set_port_filename_x, "set-port-filename!", 2, 0, 0, |
1bbd0b84 | 1336 | (SCM port, SCM filename), |
b380b885 MD |
1337 | "Change the filename associated with @var{port}, using the current input\n" |
1338 | "port if none is specified. Note that this does not change the port's\n" | |
1339 | "source of data, but only the value that is returned by\n" | |
1340 | "@code{port-filename} and reported in diagnostic output.") | |
1bbd0b84 | 1341 | #define FUNC_NAME s_scm_set_port_filename_x |
d14af9f2 | 1342 | { |
360fc44c | 1343 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 1344 | SCM_VALIDATE_OPENPORT (1,port); |
360fc44c | 1345 | /* We allow the user to set the filename to whatever he likes. */ |
b24b5e13 DH |
1346 | SCM_SET_FILENAME (port, filename); |
1347 | return SCM_UNSPECIFIED; | |
d14af9f2 | 1348 | } |
1bbd0b84 | 1349 | #undef FUNC_NAME |
d14af9f2 | 1350 | |
0f2d19dd JB |
1351 | #ifndef ttyname |
1352 | extern char * ttyname(); | |
1353 | #endif | |
1354 | ||
f12733c9 MD |
1355 | void |
1356 | scm_print_port_mode (SCM exp, SCM port) | |
1357 | { | |
1358 | scm_puts (SCM_CLOSEDP (exp) | |
1359 | ? "closed: " | |
f9a64404 DH |
1360 | : (SCM_RDNG & SCM_CELL_WORD_0 (exp) |
1361 | ? (SCM_WRTNG & SCM_CELL_WORD_0 (exp) | |
f12733c9 MD |
1362 | ? "input-output: " |
1363 | : "input: ") | |
f9a64404 | 1364 | : (SCM_WRTNG & SCM_CELL_WORD_0 (exp) |
f12733c9 MD |
1365 | ? "output: " |
1366 | : "bogus: ")), | |
1367 | port); | |
1368 | } | |
1cc91f1b | 1369 | |
f12733c9 MD |
1370 | int |
1371 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate) | |
0f2d19dd | 1372 | { |
f12733c9 MD |
1373 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
1374 | if (!type) | |
1375 | type = "port"; | |
b7f3516f | 1376 | scm_puts ("#<", port); |
f12733c9 | 1377 | scm_print_port_mode (exp, port); |
b7f3516f TT |
1378 | scm_puts (type, port); |
1379 | scm_putc (' ', port); | |
12a8b769 | 1380 | scm_intprint (SCM_CELL_WORD_1 (exp), 16, port); |
b7f3516f | 1381 | scm_putc ('>', port); |
f12733c9 | 1382 | return 1; |
0f2d19dd JB |
1383 | } |
1384 | ||
0f2d19dd JB |
1385 | void |
1386 | scm_ports_prehistory () | |
0f2d19dd JB |
1387 | { |
1388 | scm_numptob = 0; | |
f12733c9 | 1389 | scm_ptobs = (scm_ptob_descriptor *) malloc (sizeof (scm_ptob_descriptor)); |
0f2d19dd | 1390 | } |
0f2d19dd JB |
1391 | |
1392 | \f | |
ee149d03 | 1393 | |
d68fee48 | 1394 | /* Void ports. */ |
0f2d19dd | 1395 | |
e841c3e0 | 1396 | scm_bits_t scm_tc16_void_port = 0; |
0f2d19dd | 1397 | |
70df8af6 | 1398 | static int fill_input_void_port (SCM port) |
283a1a0e | 1399 | { |
70df8af6 | 1400 | return EOF; |
283a1a0e GH |
1401 | } |
1402 | ||
31703ab8 | 1403 | static void |
8aa011a1 | 1404 | write_void_port (SCM port, const void *data, size_t size) |
31703ab8 GH |
1405 | { |
1406 | } | |
1407 | ||
0f2d19dd | 1408 | SCM |
a284e297 | 1409 | scm_void_port (char *mode_str) |
0f2d19dd JB |
1410 | { |
1411 | int mode_bits; | |
1412 | SCM answer; | |
840ae05d | 1413 | scm_port * pt; |
0f2d19dd JB |
1414 | |
1415 | SCM_NEWCELL (answer); | |
1416 | SCM_DEFER_INTS; | |
1417 | mode_bits = scm_mode_bits (mode_str); | |
1418 | pt = scm_add_to_port_table (answer); | |
70df8af6 | 1419 | scm_port_non_buffer (pt); |
0f2d19dd | 1420 | SCM_SETPTAB_ENTRY (answer, pt); |
ee149d03 | 1421 | SCM_SETSTREAM (answer, 0); |
54778cd3 | 1422 | SCM_SET_CELL_TYPE (answer, scm_tc16_void_port | mode_bits); |
0f2d19dd JB |
1423 | SCM_ALLOW_INTS; |
1424 | return answer; | |
1425 | } | |
1426 | ||
a1ec6916 | 1427 | SCM_DEFINE (scm_sys_make_void_port, "%make-void-port", 1, 0, 0, |
1bbd0b84 | 1428 | (SCM mode), |
70df8af6 GH |
1429 | "Create and return a new void port. A void port acts like\n" |
1430 | "/dev/null. The @var{mode} argument\n" | |
1431 | "specifies the input/output modes for this port: see the\n" | |
b380b885 | 1432 | "documentation for @code{open-file} in @ref{File Ports}.") |
1bbd0b84 | 1433 | #define FUNC_NAME s_scm_sys_make_void_port |
0f2d19dd | 1434 | { |
a6d9e5ab DH |
1435 | SCM_VALIDATE_STRING (1, mode); |
1436 | SCM_STRING_COERCE_0TERMINATION_X (mode); | |
1437 | return scm_void_port (SCM_STRING_CHARS (mode)); | |
0f2d19dd | 1438 | } |
1bbd0b84 | 1439 | #undef FUNC_NAME |
0f2d19dd | 1440 | |
0f2d19dd | 1441 | \f |
89545eba | 1442 | /* Initialization. */ |
1cc91f1b | 1443 | |
0f2d19dd JB |
1444 | void |
1445 | scm_init_ports () | |
0f2d19dd | 1446 | { |
840ae05d JB |
1447 | /* lseek() symbols. */ |
1448 | scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET)); | |
1449 | scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR)); | |
1450 | scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END)); | |
1451 | ||
70df8af6 GH |
1452 | scm_tc16_void_port = scm_make_port_type ("void", fill_input_void_port, |
1453 | write_void_port); | |
8dc9439f | 1454 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 1455 | #include "libguile/ports.x" |
8dc9439f | 1456 | #endif |
0f2d19dd | 1457 | } |
89e00824 ML |
1458 | |
1459 | /* | |
1460 | Local Variables: | |
1461 | c-file-style: "gnu" | |
1462 | End: | |
1463 | */ |