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6fe692e9 | 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> |
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), |
e1546b65 MG |
309 | "Drain @var{port}'s read buffers (including any pushed-back\n" |
310 | "characters) and returns the content 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, |
e1546b65 MG |
334 | (), |
335 | "Return the current input port. This is the default port used\n" | |
336 | "by many input procedures. Initially, @code{current-input-port}\n" | |
337 | "returns the @dfn{standard input} in Unix and C terminology.") | |
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, |
e1546b65 MG |
345 | (), |
346 | "Return the current output port. This is the default port used\n" | |
347 | "by many output procedures. Initially, \n" | |
348 | "@code{current-output-port} returns the @dfn{standard output} in\n" | |
349 | "Unix and C terminology.") | |
1bbd0b84 | 350 | #define FUNC_NAME s_scm_current_output_port |
0f2d19dd JB |
351 | { |
352 | return scm_cur_outp; | |
353 | } | |
1bbd0b84 | 354 | #undef FUNC_NAME |
0f2d19dd | 355 | |
3b3b36dd | 356 | SCM_DEFINE (scm_current_error_port, "current-error-port", 0, 0, 0, |
1bbd0b84 | 357 | (), |
b380b885 MD |
358 | "Return the port to which errors and warnings should be sent (the\n" |
359 | "@dfn{standard error} in Unix and C terminology).") | |
1bbd0b84 | 360 | #define FUNC_NAME s_scm_current_error_port |
0f2d19dd JB |
361 | { |
362 | return scm_cur_errp; | |
363 | } | |
1bbd0b84 | 364 | #undef FUNC_NAME |
0f2d19dd | 365 | |
3b3b36dd | 366 | SCM_DEFINE (scm_current_load_port, "current-load-port", 0, 0, 0, |
e1546b65 | 367 | (), |
b450f070 | 368 | "Return the current-load-port.\n" |
e1546b65 | 369 | "The load port is used internally by @code{primitive-load}.") |
1bbd0b84 | 370 | #define FUNC_NAME s_scm_current_load_port |
31614d8e MD |
371 | { |
372 | return scm_cur_loadp; | |
373 | } | |
1bbd0b84 | 374 | #undef FUNC_NAME |
31614d8e | 375 | |
3b3b36dd | 376 | SCM_DEFINE (scm_set_current_input_port, "set-current-input-port", 1, 0, 0, |
1bbd0b84 | 377 | (SCM port), |
b380b885 MD |
378 | "@deffnx primitive set-current-output-port port\n" |
379 | "@deffnx primitive set-current-error-port port\n" | |
380 | "Change the ports returned by @code{current-input-port},\n" | |
381 | "@code{current-output-port} and @code{current-error-port}, respectively,\n" | |
382 | "so that they use the supplied @var{port} for input or output.") | |
1bbd0b84 | 383 | #define FUNC_NAME s_scm_set_current_input_port |
0f2d19dd JB |
384 | { |
385 | SCM oinp = scm_cur_inp; | |
3b3b36dd | 386 | SCM_VALIDATE_OPINPORT (1,port); |
0f2d19dd JB |
387 | scm_cur_inp = port; |
388 | return oinp; | |
389 | } | |
1bbd0b84 | 390 | #undef FUNC_NAME |
0f2d19dd JB |
391 | |
392 | ||
3b3b36dd | 393 | SCM_DEFINE (scm_set_current_output_port, "set-current-output-port", 1, 0, 0, |
e1546b65 MG |
394 | (SCM port), |
395 | "Set the current default output port to @var{port}.") | |
1bbd0b84 | 396 | #define FUNC_NAME s_scm_set_current_output_port |
0f2d19dd JB |
397 | { |
398 | SCM ooutp = scm_cur_outp; | |
78446828 | 399 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 400 | SCM_VALIDATE_OPOUTPORT (1,port); |
0f2d19dd JB |
401 | scm_cur_outp = port; |
402 | return ooutp; | |
403 | } | |
1bbd0b84 | 404 | #undef FUNC_NAME |
0f2d19dd JB |
405 | |
406 | ||
3b3b36dd | 407 | SCM_DEFINE (scm_set_current_error_port, "set-current-error-port", 1, 0, 0, |
e1546b65 MG |
408 | (SCM port), |
409 | "Set the current default error port to @var{port}.") | |
1bbd0b84 | 410 | #define FUNC_NAME s_scm_set_current_error_port |
0f2d19dd JB |
411 | { |
412 | SCM oerrp = scm_cur_errp; | |
78446828 | 413 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 414 | SCM_VALIDATE_OPOUTPORT (1,port); |
0f2d19dd JB |
415 | scm_cur_errp = port; |
416 | return oerrp; | |
417 | } | |
1bbd0b84 | 418 | #undef FUNC_NAME |
0f2d19dd JB |
419 | |
420 | \f | |
840ae05d | 421 | /* The port table --- an array of pointers to ports. */ |
0f2d19dd | 422 | |
840ae05d | 423 | scm_port **scm_port_table; |
0f2d19dd JB |
424 | |
425 | int scm_port_table_size = 0; /* Number of ports in scm_port_table. */ | |
426 | int scm_port_table_room = 20; /* Size of the array. */ | |
427 | ||
ee149d03 | 428 | /* Add a port to the table. */ |
1cc91f1b | 429 | |
840ae05d | 430 | scm_port * |
a284e297 | 431 | scm_add_to_port_table (SCM port) |
0f2d19dd | 432 | { |
840ae05d JB |
433 | scm_port *entry; |
434 | ||
0f2d19dd JB |
435 | if (scm_port_table_size == scm_port_table_room) |
436 | { | |
ee149d03 | 437 | void *newt = realloc ((char *) scm_port_table, |
840ae05d | 438 | (scm_sizet) (sizeof (scm_port *) |
ee149d03 JB |
439 | * scm_port_table_room * 2)); |
440 | if (newt == NULL) | |
840ae05d JB |
441 | scm_memory_error ("scm_add_to_port_table"); |
442 | scm_port_table = (scm_port **) newt; | |
0f2d19dd JB |
443 | scm_port_table_room *= 2; |
444 | } | |
840ae05d JB |
445 | entry = (scm_port *) malloc (sizeof (scm_port)); |
446 | if (entry == NULL) | |
447 | scm_memory_error ("scm_add_to_port_table"); | |
448 | ||
449 | entry->port = port; | |
450 | entry->entry = scm_port_table_size; | |
451 | entry->revealed = 0; | |
452 | entry->stream = 0; | |
453 | entry->file_name = SCM_BOOL_F; | |
454 | entry->line_number = 0; | |
455 | entry->column_number = 0; | |
6c951427 GH |
456 | entry->putback_buf = 0; |
457 | entry->putback_buf_size = 0; | |
61e452ba | 458 | entry->rw_active = SCM_PORT_NEITHER; |
0de97b83 | 459 | entry->rw_random = 0; |
840ae05d JB |
460 | |
461 | scm_port_table[scm_port_table_size] = entry; | |
462 | scm_port_table_size++; | |
463 | ||
464 | return entry; | |
0f2d19dd JB |
465 | } |
466 | ||
6c951427 | 467 | /* Remove a port from the table and destroy it. */ |
1cc91f1b | 468 | |
0f2d19dd | 469 | void |
a284e297 | 470 | scm_remove_from_port_table (SCM port) |
0f2d19dd | 471 | { |
840ae05d | 472 | scm_port *p = SCM_PTAB_ENTRY (port); |
ee1e7e13 | 473 | int i = p->entry; |
6c951427 | 474 | |
ee1e7e13 MD |
475 | if (i >= scm_port_table_size) |
476 | scm_wta (port, "Port not in table", "scm_remove_from_port_table"); | |
6c951427 GH |
477 | if (p->putback_buf) |
478 | free (p->putback_buf); | |
840ae05d | 479 | free (p); |
ee1e7e13 MD |
480 | /* Since we have just freed slot i we can shrink the table by moving |
481 | the last entry to that slot... */ | |
482 | if (i < scm_port_table_size - 1) | |
0f2d19dd | 483 | { |
ee1e7e13 MD |
484 | scm_port_table[i] = scm_port_table[scm_port_table_size - 1]; |
485 | scm_port_table[i]->entry = i; | |
0f2d19dd | 486 | } |
0f2d19dd JB |
487 | SCM_SETPTAB_ENTRY (port, 0); |
488 | scm_port_table_size--; | |
489 | } | |
490 | ||
fea6b4ea | 491 | #ifdef GUILE_DEBUG |
b450f070 | 492 | /* Functions for debugging. */ |
1cc91f1b | 493 | |
3b3b36dd | 494 | SCM_DEFINE (scm_pt_size, "pt-size", 0, 0, 0, |
b450f070 GB |
495 | (), |
496 | "Returns the number of ports in the port table.\n" | |
497 | "`pt-size' is only included in GUILE_DEBUG builds.") | |
1bbd0b84 | 498 | #define FUNC_NAME s_scm_pt_size |
0f2d19dd JB |
499 | { |
500 | return SCM_MAKINUM (scm_port_table_size); | |
501 | } | |
1bbd0b84 | 502 | #undef FUNC_NAME |
0f2d19dd | 503 | |
3b3b36dd | 504 | SCM_DEFINE (scm_pt_member, "pt-member", 1, 0, 0, |
b450f070 GB |
505 | (SCM index), |
506 | "Returns the port at INDEX in the port table.\n" | |
507 | "`pt-member' is only included in GUILE_DEBUG builds.") | |
1bbd0b84 | 508 | #define FUNC_NAME s_scm_pt_member |
0f2d19dd JB |
509 | { |
510 | int i; | |
b450f070 | 511 | SCM_VALIDATE_INUM_COPY (1,index,i); |
0f2d19dd JB |
512 | if (i < 0 || i >= scm_port_table_size) |
513 | return SCM_BOOL_F; | |
514 | else | |
515 | return scm_port_table[i]->port; | |
516 | } | |
1bbd0b84 | 517 | #undef FUNC_NAME |
0f2d19dd JB |
518 | #endif |
519 | ||
70df8af6 GH |
520 | void |
521 | scm_port_non_buffer (scm_port *pt) | |
522 | { | |
523 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; | |
524 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
525 | pt->read_buf_size = pt->write_buf_size = 1; | |
526 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
527 | } | |
0f2d19dd | 528 | |
d68fee48 JB |
529 | \f |
530 | /* Revealed counts --- an oddity inherited from SCSH. */ | |
531 | ||
8b13c6b3 GH |
532 | /* Find a port in the table and return its revealed count. |
533 | Also used by the garbage collector. | |
0f2d19dd | 534 | */ |
1cc91f1b | 535 | |
0f2d19dd | 536 | int |
a284e297 | 537 | scm_revealed_count (SCM port) |
0f2d19dd JB |
538 | { |
539 | return SCM_REVEALED(port); | |
540 | } | |
541 | ||
542 | ||
543 | ||
544 | /* Return the revealed count for a port. */ | |
545 | ||
3b3b36dd | 546 | SCM_DEFINE (scm_port_revealed, "port-revealed", 1, 0, 0, |
1bbd0b84 | 547 | (SCM port), |
b380b885 | 548 | "Returns the revealed count for @var{port}.") |
1bbd0b84 | 549 | #define FUNC_NAME s_scm_port_revealed |
0f2d19dd | 550 | { |
78446828 | 551 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 552 | SCM_VALIDATE_PORT (1,port); |
8b13c6b3 | 553 | return SCM_MAKINUM (scm_revealed_count (port)); |
0f2d19dd | 554 | } |
1bbd0b84 | 555 | #undef FUNC_NAME |
0f2d19dd JB |
556 | |
557 | /* Set the revealed count for a port. */ | |
3b3b36dd | 558 | SCM_DEFINE (scm_set_port_revealed_x, "set-port-revealed!", 2, 0, 0, |
1bbd0b84 | 559 | (SCM port, SCM rcount), |
b450f070 | 560 | "Sets the revealed count for a port to a given value.\n" |
b380b885 | 561 | "The return value is unspecified.") |
1bbd0b84 | 562 | #define FUNC_NAME s_scm_set_port_revealed_x |
0f2d19dd | 563 | { |
78446828 | 564 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd GB |
565 | SCM_VALIDATE_PORT (1,port); |
566 | SCM_VALIDATE_INUM (2,rcount); | |
0f2d19dd | 567 | SCM_REVEALED (port) = SCM_INUM (rcount); |
8b13c6b3 | 568 | return SCM_UNSPECIFIED; |
0f2d19dd | 569 | } |
1bbd0b84 | 570 | #undef FUNC_NAME |
0f2d19dd | 571 | |
d68fee48 JB |
572 | |
573 | \f | |
574 | /* Retrieving a port's mode. */ | |
575 | ||
eadd48de GH |
576 | /* Return the flags that characterize a port based on the mode |
577 | * string used to open a file for that port. | |
578 | * | |
579 | * See PORT FLAGS in scm.h | |
580 | */ | |
581 | ||
582 | long | |
a284e297 | 583 | scm_mode_bits (char *modes) |
eadd48de GH |
584 | { |
585 | return (SCM_OPN | |
586 | | (strchr (modes, 'r') || strchr (modes, '+') ? SCM_RDNG : 0) | |
587 | | ( strchr (modes, 'w') | |
588 | || strchr (modes, 'a') | |
589 | || strchr (modes, '+') ? SCM_WRTNG : 0) | |
ee149d03 JB |
590 | | (strchr (modes, '0') ? SCM_BUF0 : 0) |
591 | | (strchr (modes, 'l') ? SCM_BUFLINE : 0)); | |
eadd48de GH |
592 | } |
593 | ||
594 | ||
595 | /* Return the mode flags from an open port. | |
596 | * Some modes such as "append" are only used when opening | |
597 | * a file and are not returned here. */ | |
598 | ||
3b3b36dd | 599 | SCM_DEFINE (scm_port_mode, "port-mode", 1, 0, 0, |
1bbd0b84 | 600 | (SCM port), |
b380b885 MD |
601 | "Returns the port modes associated with the open port @var{port}. These\n" |
602 | "will not necessarily be identical to the modes used when the port was\n" | |
603 | "opened, since modes such as \"append\" which are used only during\n" | |
604 | "port creation are not retained.") | |
1bbd0b84 | 605 | #define FUNC_NAME s_scm_port_mode |
eadd48de GH |
606 | { |
607 | char modes[3]; | |
608 | modes[0] = '\0'; | |
78446828 MV |
609 | |
610 | port = SCM_COERCE_OUTPORT (port); | |
3b3b36dd | 611 | SCM_VALIDATE_OPPORT (1,port); |
f9a64404 DH |
612 | if (SCM_CELL_WORD_0 (port) & SCM_RDNG) { |
613 | if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) | |
eadd48de GH |
614 | strcpy (modes, "r+"); |
615 | else | |
616 | strcpy (modes, "r"); | |
617 | } | |
f9a64404 | 618 | else if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) |
eadd48de | 619 | strcpy (modes, "w"); |
f9a64404 | 620 | if (SCM_CELL_WORD_0 (port) & SCM_BUF0) |
eadd48de GH |
621 | strcat (modes, "0"); |
622 | return scm_makfromstr (modes, strlen (modes), 0); | |
623 | } | |
1bbd0b84 | 624 | #undef FUNC_NAME |
eadd48de GH |
625 | |
626 | ||
d68fee48 JB |
627 | \f |
628 | /* Closing ports. */ | |
629 | ||
0f2d19dd JB |
630 | /* scm_close_port |
631 | * Call the close operation on a port object. | |
eadd48de | 632 | * see also scm_close. |
0f2d19dd | 633 | */ |
3b3b36dd | 634 | SCM_DEFINE (scm_close_port, "close-port", 1, 0, 0, |
1bbd0b84 | 635 | (SCM port), |
b380b885 MD |
636 | "Close the specified port object. Returns @code{#t} if it successfully\n" |
637 | "closes a port or @code{#f} if it was already\n" | |
638 | "closed. An exception may be raised if an error occurs, for example\n" | |
639 | "when flushing buffered output.\n" | |
640 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
641 | "which can close file descriptors.") | |
1bbd0b84 | 642 | #define FUNC_NAME s_scm_close_port |
0f2d19dd JB |
643 | { |
644 | scm_sizet i; | |
eadd48de GH |
645 | int rv; |
646 | ||
78446828 MV |
647 | port = SCM_COERCE_OUTPORT (port); |
648 | ||
7a754ca6 | 649 | SCM_VALIDATE_PORT (1, port); |
0f2d19dd | 650 | if (SCM_CLOSEDP (port)) |
eadd48de | 651 | return SCM_BOOL_F; |
0f2d19dd | 652 | i = SCM_PTOBNUM (port); |
affc96b5 GH |
653 | if (scm_ptobs[i].close) |
654 | rv = (scm_ptobs[i].close) (port); | |
eadd48de GH |
655 | else |
656 | rv = 0; | |
0f2d19dd | 657 | scm_remove_from_port_table (port); |
898a256f | 658 | SCM_SETAND_CAR (port, ~SCM_OPN); |
7a754ca6 MD |
659 | return SCM_NEGATE_BOOL (rv < 0); |
660 | } | |
661 | #undef FUNC_NAME | |
662 | ||
663 | SCM_DEFINE (scm_close_input_port, "close-input-port", 1, 0, 0, | |
664 | (SCM port), | |
665 | "Close the specified input port object. The routine has no effect if\n" | |
666 | "the file has already been closed. An exception may be raised if an\n" | |
667 | "error occurs. The value returned is unspecified.\n\n" | |
668 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
669 | "which can close file descriptors.") | |
670 | #define FUNC_NAME s_scm_close_input_port | |
671 | { | |
672 | SCM_VALIDATE_INPUT_PORT (1, port); | |
673 | scm_close_port (port); | |
674 | return SCM_UNSPECIFIED; | |
675 | } | |
676 | #undef FUNC_NAME | |
677 | ||
678 | SCM_DEFINE (scm_close_output_port, "close-output-port", 1, 0, 0, | |
679 | (SCM port), | |
680 | "Close the specified output port object. The routine has no effect if\n" | |
681 | "the file has already been closed. An exception may be raised if an\n" | |
682 | "error occurs. The value returned is unspecified.\n\n" | |
683 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
684 | "which can close file descriptors.") | |
685 | #define FUNC_NAME s_scm_close_output_port | |
686 | { | |
687 | port = SCM_COERCE_OUTPORT (port); | |
688 | SCM_VALIDATE_OUTPUT_PORT (1, port); | |
689 | scm_close_port (port); | |
690 | return SCM_UNSPECIFIED; | |
0f2d19dd | 691 | } |
1bbd0b84 | 692 | #undef FUNC_NAME |
0f2d19dd | 693 | |
c2ca4493 GH |
694 | SCM_DEFINE (scm_port_for_each, "port-for-each", 1, 0, 0, |
695 | (SCM proc), | |
696 | "Apply @var{proc} to each port in the Guile port table\n" | |
2f1bbcfd MV |
697 | "in turn. The return value is unspecified. More specifically,\n" |
698 | "@var{proc} is applied exactly once to every port that exists\n" | |
699 | "in the system at the time @var{port-for-each} is invoked.\n" | |
700 | "Changes to the port table while @var{port-for-each} is running\n" | |
701 | "have no effect as far as @var{port-for-each} is concerned.\n") | |
c2ca4493 GH |
702 | #define FUNC_NAME s_scm_port_for_each |
703 | { | |
704 | int i; | |
fdfe6305 MV |
705 | SCM ports; |
706 | ||
c2ca4493 GH |
707 | SCM_VALIDATE_PROC (1, proc); |
708 | ||
709 | /* when pre-emptive multithreading is supported, access to the port | |
710 | table will need to be controlled by a mutex. */ | |
fdfe6305 MV |
711 | |
712 | /* Even without pre-emptive multithreading, running arbitrary code | |
713 | while scanning the port table is unsafe because the port table | |
714 | can change arbitrarily (from a GC, for example). So we build a | |
715 | list in advance while blocking the GC. -mvo */ | |
716 | ||
c2ca4493 | 717 | SCM_DEFER_INTS; |
fdfe6305 MV |
718 | scm_block_gc++; |
719 | ports = SCM_EOL; | |
c2ca4493 | 720 | for (i = 0; i < scm_port_table_size; i++) |
fdfe6305 MV |
721 | ports = scm_cons (scm_port_table[i]->port, ports); |
722 | scm_block_gc--; | |
723 | SCM_ALLOW_INTS; | |
724 | ||
725 | while (ports != SCM_EOL) | |
c2ca4493 | 726 | { |
fdfe6305 MV |
727 | scm_apply (proc, scm_cons (SCM_CAR (ports), SCM_EOL), SCM_EOL); |
728 | ports = SCM_CDR (ports); | |
c2ca4493 | 729 | } |
fdfe6305 | 730 | |
c2ca4493 GH |
731 | return SCM_UNSPECIFIED; |
732 | } | |
733 | #undef FUNC_NAME | |
734 | ||
b875c468 GH |
735 | #if (SCM_DEBUG_DEPRECATED == 0) |
736 | ||
3b3b36dd | 737 | SCM_DEFINE (scm_close_all_ports_except, "close-all-ports-except", 0, 0, 1, |
1bbd0b84 | 738 | (SCM ports), |
b875c468 | 739 | "[DEPRECATED] Close all open file ports used by the interpreter\n" |
b380b885 | 740 | "except for those supplied as arguments. This procedure\n" |
b875c468 GH |
741 | "was intended to be used before an exec call to close file descriptors\n" |
742 | "which are not needed in the new process. However it has the\n" | |
743 | "undesirable side-effect of flushing buffes, so it's deprecated.\n" | |
744 | "Use port-for-each instead.") | |
1bbd0b84 | 745 | #define FUNC_NAME s_scm_close_all_ports_except |
0f2d19dd JB |
746 | { |
747 | int i = 0; | |
af45e3b0 | 748 | SCM_VALIDATE_REST_ARGUMENT (ports); |
0f2d19dd JB |
749 | while (i < scm_port_table_size) |
750 | { | |
751 | SCM thisport = scm_port_table[i]->port; | |
752 | int found = 0; | |
753 | SCM ports_ptr = ports; | |
754 | ||
755 | while (SCM_NNULLP (ports_ptr)) | |
756 | { | |
78446828 | 757 | SCM port = SCM_COERCE_OUTPORT (SCM_CAR (ports_ptr)); |
0f2d19dd | 758 | if (i == 0) |
3b3b36dd | 759 | SCM_VALIDATE_OPPORT (SCM_ARG1,port); |
54778cd3 | 760 | if (SCM_EQ_P (port, thisport)) |
0f2d19dd JB |
761 | found = 1; |
762 | ports_ptr = SCM_CDR (ports_ptr); | |
763 | } | |
764 | if (found) | |
765 | i++; | |
766 | else | |
767 | /* i is not to be incremented here. */ | |
768 | scm_close_port (thisport); | |
769 | } | |
0f2d19dd JB |
770 | return SCM_UNSPECIFIED; |
771 | } | |
1bbd0b84 | 772 | #undef FUNC_NAME |
0f2d19dd | 773 | |
b875c468 | 774 | #endif |
d68fee48 JB |
775 | |
776 | \f | |
777 | /* Utter miscellany. Gosh, we should clean this up some time. */ | |
778 | ||
3b3b36dd | 779 | SCM_DEFINE (scm_input_port_p, "input-port?", 1, 0, 0, |
1bbd0b84 | 780 | (SCM x), |
bfc46627 GB |
781 | "Returns @code{#t} if @var{x} is an input port, otherwise returns\n" |
782 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
783 | "@code{port?}.") | |
1bbd0b84 | 784 | #define FUNC_NAME s_scm_input_port_p |
0f2d19dd JB |
785 | { |
786 | if (SCM_IMP (x)) | |
4a94d8ca | 787 | return SCM_BOOL_F; |
f5f2dcff | 788 | return SCM_BOOL(SCM_INPUT_PORT_P (x)); |
0f2d19dd | 789 | } |
1bbd0b84 | 790 | #undef FUNC_NAME |
0f2d19dd | 791 | |
3b3b36dd | 792 | SCM_DEFINE (scm_output_port_p, "output-port?", 1, 0, 0, |
1bbd0b84 | 793 | (SCM x), |
bfc46627 GB |
794 | "Returns @code{#t} if @var{x} is an output port, otherwise returns\n" |
795 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
796 | "@code{port?}.") | |
1bbd0b84 | 797 | #define FUNC_NAME s_scm_output_port_p |
0f2d19dd JB |
798 | { |
799 | if (SCM_IMP (x)) | |
4a94d8ca MD |
800 | return SCM_BOOL_F; |
801 | if (SCM_PORT_WITH_PS_P (x)) | |
802 | x = SCM_PORT_WITH_PS_PORT (x); | |
f5f2dcff | 803 | return SCM_BOOL(SCM_OUTPUT_PORT_P (x)); |
0f2d19dd | 804 | } |
1bbd0b84 | 805 | #undef FUNC_NAME |
0f2d19dd | 806 | |
eb5c0a2a GH |
807 | SCM_DEFINE (scm_port_p, "port?", 1, 0, 0, |
808 | (SCM x), | |
809 | "Returns a boolean indicating whether @var{x} is a port.\n" | |
810 | "Equivalent to @code{(or (input-port? X) (output-port? X))}.") | |
811 | #define FUNC_NAME s_scm_port_p | |
812 | { | |
813 | return SCM_BOOL (SCM_PORTP (x)); | |
814 | } | |
815 | #undef FUNC_NAME | |
816 | ||
3b3b36dd | 817 | SCM_DEFINE (scm_port_closed_p, "port-closed?", 1, 0, 0, |
1bbd0b84 | 818 | (SCM port), |
b380b885 | 819 | "Returns @code{#t} if @var{port} is closed or @code{#f} if it is open.") |
1bbd0b84 | 820 | #define FUNC_NAME s_scm_port_closed_p |
60d0643d | 821 | { |
c1bfcf60 | 822 | SCM_VALIDATE_PORT (1,port); |
1bbd0b84 | 823 | return SCM_NEGATE_BOOL(SCM_OPPORTP (port)); |
60d0643d | 824 | } |
1bbd0b84 | 825 | #undef FUNC_NAME |
0f2d19dd | 826 | |
3b3b36dd | 827 | SCM_DEFINE (scm_eof_object_p, "eof-object?", 1, 0, 0, |
1bbd0b84 | 828 | (SCM x), |
bfc46627 GB |
829 | "Returns @code{#t} if @var{x} is an end-of-file object; otherwise\n" |
830 | "returns @code{#f}.") | |
1bbd0b84 | 831 | #define FUNC_NAME s_scm_eof_object_p |
0f2d19dd | 832 | { |
1bbd0b84 | 833 | return SCM_BOOL(SCM_EOF_OBJECT_P (x)); |
0f2d19dd | 834 | } |
1bbd0b84 | 835 | #undef FUNC_NAME |
0f2d19dd | 836 | |
3b3b36dd | 837 | SCM_DEFINE (scm_force_output, "force-output", 0, 1, 0, |
1bbd0b84 | 838 | (SCM port), |
b380b885 MD |
839 | "Flush the specified output port, or the current output port if @var{port}\n" |
840 | "is omitted. The current output buffer contents are passed to the \n" | |
841 | "underlying port implementation (e.g., in the case of fports, the\n" | |
842 | "data will be written to the file and the output buffer will be cleared.)\n" | |
843 | "It has no effect on an unbuffered port.\n\n" | |
844 | "The return value is unspecified.") | |
1bbd0b84 | 845 | #define FUNC_NAME s_scm_force_output |
0f2d19dd JB |
846 | { |
847 | if (SCM_UNBNDP (port)) | |
3e877d15 | 848 | port = scm_cur_outp; |
0f2d19dd | 849 | else |
78446828 MV |
850 | { |
851 | port = SCM_COERCE_OUTPORT (port); | |
3b3b36dd | 852 | SCM_VALIDATE_OPOUTPORT (1,port); |
78446828 | 853 | } |
affc96b5 | 854 | scm_flush (port); |
ee149d03 | 855 | return SCM_UNSPECIFIED; |
0f2d19dd | 856 | } |
1bbd0b84 | 857 | #undef FUNC_NAME |
0f2d19dd | 858 | |
a1ec6916 | 859 | SCM_DEFINE (scm_flush_all_ports, "flush-all-ports", 0, 0, 0, |
1bbd0b84 | 860 | (), |
b380b885 MD |
861 | "Equivalent to calling @code{force-output} on\n" |
862 | "all open output ports. The return value is unspecified.") | |
1bbd0b84 | 863 | #define FUNC_NAME s_scm_flush_all_ports |
89ea5b7c GH |
864 | { |
865 | int i; | |
866 | ||
867 | for (i = 0; i < scm_port_table_size; i++) | |
868 | { | |
ee149d03 | 869 | if (SCM_OPOUTPORTP (scm_port_table[i]->port)) |
affc96b5 | 870 | scm_flush (scm_port_table[i]->port); |
89ea5b7c GH |
871 | } |
872 | return SCM_UNSPECIFIED; | |
873 | } | |
1bbd0b84 | 874 | #undef FUNC_NAME |
0f2d19dd | 875 | |
3b3b36dd | 876 | SCM_DEFINE (scm_read_char, "read-char", 0, 1, 0, |
1bbd0b84 | 877 | (SCM port), |
bfc46627 GB |
878 | "Returns the next character available from @var{port}, updating\n" |
879 | "@var{port} to point to the following character. If no more\n" | |
880 | "characters are available, an end-of-file object is returned.") | |
1bbd0b84 | 881 | #define FUNC_NAME s_scm_read_char |
0f2d19dd JB |
882 | { |
883 | int c; | |
884 | if (SCM_UNBNDP (port)) | |
334341aa | 885 | port = scm_cur_inp; |
3b3b36dd | 886 | SCM_VALIDATE_OPINPORT (1,port); |
b7f3516f | 887 | c = scm_getc (port); |
0f2d19dd JB |
888 | if (EOF == c) |
889 | return SCM_EOF_VAL; | |
7866a09b | 890 | return SCM_MAKE_CHAR (c); |
0f2d19dd | 891 | } |
1bbd0b84 | 892 | #undef FUNC_NAME |
0f2d19dd | 893 | |
5c070ca7 | 894 | /* this should only be called when the read buffer is empty. it |
affc96b5 | 895 | tries to refill the read buffer. it returns the first char from |
5c070ca7 | 896 | the port, which is either EOF or *(pt->read_pos). */ |
6c951427 | 897 | int |
affc96b5 | 898 | scm_fill_input (SCM port) |
6c951427 | 899 | { |
283a1a0e GH |
900 | scm_port *pt = SCM_PTAB_ENTRY (port); |
901 | ||
6c951427 GH |
902 | if (pt->read_buf == pt->putback_buf) |
903 | { | |
904 | /* finished reading put-back chars. */ | |
905 | pt->read_buf = pt->saved_read_buf; | |
906 | pt->read_pos = pt->saved_read_pos; | |
907 | pt->read_end = pt->saved_read_end; | |
908 | pt->read_buf_size = pt->saved_read_buf_size; | |
909 | if (pt->read_pos < pt->read_end) | |
5c070ca7 | 910 | return *(pt->read_pos); |
6c951427 | 911 | } |
affc96b5 | 912 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
6c951427 GH |
913 | } |
914 | ||
ee149d03 | 915 | int |
a284e297 | 916 | scm_getc (SCM port) |
0f2d19dd JB |
917 | { |
918 | int c; | |
840ae05d | 919 | scm_port *pt = SCM_PTAB_ENTRY (port); |
ee149d03 | 920 | |
840ae05d JB |
921 | if (pt->rw_active == SCM_PORT_WRITE) |
922 | { | |
affc96b5 GH |
923 | /* may be marginally faster than calling scm_flush. */ |
924 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
840ae05d | 925 | } |
6c951427 | 926 | |
5c070ca7 GH |
927 | if (pt->rw_random) |
928 | pt->rw_active = SCM_PORT_READ; | |
929 | ||
930 | if (pt->read_pos >= pt->read_end) | |
ee149d03 | 931 | { |
affc96b5 | 932 | if (scm_fill_input (port) == EOF) |
5c070ca7 | 933 | return EOF; |
ee149d03 JB |
934 | } |
935 | ||
5c070ca7 | 936 | c = *(pt->read_pos++); |
840ae05d | 937 | |
ee149d03 JB |
938 | if (c == '\n') |
939 | { | |
940 | SCM_INCLINE (port); | |
941 | } | |
942 | else if (c == '\t') | |
943 | { | |
944 | SCM_TABCOL (port); | |
945 | } | |
946 | else | |
947 | { | |
948 | SCM_INCCOL (port); | |
949 | } | |
950 | ||
951 | return c; | |
0f2d19dd JB |
952 | } |
953 | ||
ee149d03 | 954 | void |
a284e297 | 955 | scm_putc (char c, SCM port) |
ee149d03 | 956 | { |
265e6a4d | 957 | scm_lfwrite (&c, 1, port); |
ee149d03 | 958 | } |
3cb988bd | 959 | |
ee149d03 | 960 | void |
70d63753 | 961 | scm_puts (const char *s, SCM port) |
3cb988bd | 962 | { |
265e6a4d | 963 | scm_lfwrite (s, strlen (s), port); |
ee149d03 | 964 | } |
3cb988bd | 965 | |
6fe692e9 MD |
966 | /* scm_lfwrite |
967 | * | |
968 | * Currently, this function has an identical implementation to | |
969 | * scm_c_write. We could have turned it into a macro expanding into a | |
970 | * call to scm_c_write. However, the implementation is small and | |
971 | * might differ in the future. | |
972 | */ | |
973 | ||
ee149d03 | 974 | void |
70d63753 | 975 | scm_lfwrite (const char *ptr, scm_sizet size, SCM port) |
ee149d03 | 976 | { |
840ae05d | 977 | scm_port *pt = SCM_PTAB_ENTRY (port); |
f12733c9 | 978 | scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
3e2043c4 | 979 | |
840ae05d | 980 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 981 | scm_end_input (port); |
283a1a0e | 982 | |
31703ab8 | 983 | ptob->write (port, ptr, size); |
840ae05d JB |
984 | |
985 | if (pt->rw_random) | |
986 | pt->rw_active = SCM_PORT_WRITE; | |
ee149d03 | 987 | } |
3cb988bd | 988 | |
6fe692e9 MD |
989 | /* scm_c_read |
990 | * | |
991 | * Used by an application to read arbitrary number of bytes from an | |
992 | * SCM port. Same semantics as libc read, except that scm_c_read only | |
993 | * returns less than SIZE bytes if at end-of-file. | |
994 | * | |
995 | * Warning: Doesn't update port line and column counts! */ | |
996 | ||
997 | scm_sizet | |
998 | scm_c_read (SCM port, void *buffer, scm_sizet size) | |
999 | { | |
1000 | scm_port *pt = SCM_PTAB_ENTRY (port); | |
1001 | scm_sizet n_read = 0, n_available; | |
1002 | ||
1003 | if (pt->rw_active == SCM_PORT_WRITE) | |
1004 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
1005 | ||
1006 | if (pt->rw_random) | |
1007 | pt->rw_active = SCM_PORT_READ; | |
1008 | ||
1009 | if (SCM_READ_BUFFER_EMPTY_P (pt)) | |
1010 | { | |
1011 | if (scm_fill_input (port) == EOF) | |
1012 | return 0; | |
1013 | } | |
1014 | ||
1015 | n_available = pt->read_end - pt->read_pos; | |
1016 | ||
1017 | while (n_available < size) | |
1018 | { | |
1019 | memcpy (buffer, pt->read_pos, n_available); | |
1020 | buffer += n_available; | |
1021 | pt->read_pos += n_available; | |
1022 | n_read += n_available; | |
1023 | ||
1024 | if (SCM_READ_BUFFER_EMPTY_P (pt)) | |
1025 | { | |
1026 | if (scm_fill_input (port) == EOF) | |
1027 | return n_read; | |
1028 | } | |
1029 | ||
1030 | size -= n_available; | |
1031 | n_available = pt->read_end - pt->read_pos; | |
1032 | } | |
1033 | ||
1034 | memcpy (buffer, pt->read_pos, size); | |
1035 | pt->read_pos += size; | |
1036 | ||
1037 | return n_read + size; | |
1038 | } | |
1039 | ||
1040 | /* scm_c_write | |
1041 | * | |
1042 | * Used by an application to write arbitrary number of bytes to an SCM | |
1043 | * port. Similar semantics as libc write. However, unlike libc | |
1044 | * write, scm_c_write writes the requested number of bytes and has no | |
1045 | * return value. | |
1046 | * | |
1047 | * Warning: Doesn't update port line and column counts! | |
1048 | */ | |
1049 | ||
1050 | void | |
1051 | scm_c_write (SCM port, const void *ptr, scm_sizet size) | |
1052 | { | |
1053 | scm_port *pt = SCM_PTAB_ENTRY (port); | |
1054 | scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
1055 | ||
1056 | if (pt->rw_active == SCM_PORT_READ) | |
1057 | scm_end_input (port); | |
1058 | ||
1059 | ptob->write (port, ptr, size); | |
1060 | ||
1061 | if (pt->rw_random) | |
1062 | pt->rw_active = SCM_PORT_WRITE; | |
1063 | } | |
3cb988bd | 1064 | |
ee149d03 | 1065 | void |
a284e297 | 1066 | scm_flush (SCM port) |
ee149d03 JB |
1067 | { |
1068 | scm_sizet i = SCM_PTOBNUM (port); | |
affc96b5 | 1069 | (scm_ptobs[i].flush) (port); |
ee149d03 JB |
1070 | } |
1071 | ||
283a1a0e | 1072 | void |
a284e297 | 1073 | scm_end_input (SCM port) |
283a1a0e GH |
1074 | { |
1075 | int offset; | |
1076 | scm_port *pt = SCM_PTAB_ENTRY (port); | |
1077 | ||
1078 | if (pt->read_buf == pt->putback_buf) | |
1079 | { | |
1080 | offset = pt->read_end - pt->read_pos; | |
1081 | pt->read_buf = pt->saved_read_buf; | |
1082 | pt->read_pos = pt->saved_read_pos; | |
1083 | pt->read_end = pt->saved_read_end; | |
1084 | pt->read_buf_size = pt->saved_read_buf_size; | |
1085 | } | |
1086 | else | |
1087 | offset = 0; | |
1088 | ||
affc96b5 | 1089 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
283a1a0e GH |
1090 | } |
1091 | ||
ee149d03 JB |
1092 | \f |
1093 | ||
1094 | ||
1095 | void | |
a284e297 | 1096 | scm_ungetc (int c, SCM port) |
ee149d03 | 1097 | { |
840ae05d JB |
1098 | scm_port *pt = SCM_PTAB_ENTRY (port); |
1099 | ||
6c951427 GH |
1100 | if (pt->read_buf == pt->putback_buf) |
1101 | /* already using the put-back buffer. */ | |
1102 | { | |
1103 | /* enlarge putback_buf if necessary. */ | |
1104 | if (pt->read_end == pt->read_buf + pt->read_buf_size | |
1105 | && pt->read_buf == pt->read_pos) | |
1106 | { | |
1107 | int new_size = pt->read_buf_size * 2; | |
1108 | unsigned char *tmp = | |
1109 | (unsigned char *) realloc (pt->putback_buf, new_size); | |
1110 | ||
1111 | if (tmp == NULL) | |
1112 | scm_memory_error ("scm_ungetc"); | |
1113 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; | |
1114 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
1115 | pt->read_buf_size = pt->putback_buf_size = new_size; | |
1116 | } | |
1117 | ||
1118 | /* shift any existing bytes to buffer + 1. */ | |
1119 | if (pt->read_pos == pt->read_end) | |
1120 | pt->read_end = pt->read_buf + 1; | |
1121 | else if (pt->read_pos != pt->read_buf + 1) | |
1122 | { | |
1123 | int count = pt->read_end - pt->read_pos; | |
1124 | ||
1125 | memmove (pt->read_buf + 1, pt->read_pos, count); | |
1126 | pt->read_end = pt->read_buf + 1 + count; | |
1127 | } | |
1128 | ||
1129 | pt->read_pos = pt->read_buf; | |
1130 | } | |
1131 | else | |
1132 | /* switch to the put-back buffer. */ | |
1133 | { | |
1134 | if (pt->putback_buf == NULL) | |
1135 | { | |
c357d546 MD |
1136 | pt->putback_buf |
1137 | = (unsigned char *) malloc (SCM_INITIAL_PUTBACK_BUF_SIZE); | |
6c951427 GH |
1138 | if (pt->putback_buf == NULL) |
1139 | scm_memory_error ("scm_ungetc"); | |
1140 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; | |
1141 | } | |
1142 | ||
1143 | pt->saved_read_buf = pt->read_buf; | |
1144 | pt->saved_read_pos = pt->read_pos; | |
1145 | pt->saved_read_end = pt->read_end; | |
1146 | pt->saved_read_buf_size = pt->read_buf_size; | |
1147 | ||
1148 | pt->read_pos = pt->read_buf = pt->putback_buf; | |
1149 | pt->read_end = pt->read_buf + 1; | |
1150 | pt->read_buf_size = pt->putback_buf_size; | |
1151 | } | |
1152 | ||
1153 | *pt->read_buf = c; | |
ee149d03 | 1154 | |
840ae05d JB |
1155 | if (pt->rw_random) |
1156 | pt->rw_active = SCM_PORT_READ; | |
1157 | ||
ee149d03 JB |
1158 | if (c == '\n') |
1159 | { | |
1160 | /* What should col be in this case? | |
1161 | * We'll leave it at -1. | |
1162 | */ | |
1163 | SCM_LINUM (port) -= 1; | |
1164 | } | |
1165 | else | |
1166 | SCM_COL(port) -= 1; | |
1167 | } | |
1168 | ||
1169 | ||
1170 | void | |
70d63753 | 1171 | scm_ungets (const char *s, int n, SCM port) |
ee149d03 JB |
1172 | { |
1173 | /* This is simple minded and inefficient, but unreading strings is | |
1174 | * probably not a common operation, and remember that line and | |
1175 | * column numbers have to be handled... | |
1176 | * | |
1177 | * Please feel free to write an optimized version! | |
1178 | */ | |
1179 | while (n--) | |
1180 | scm_ungetc (s[n], port); | |
1181 | } | |
1182 | ||
1183 | ||
3b3b36dd | 1184 | SCM_DEFINE (scm_peek_char, "peek-char", 0, 1, 0, |
1bbd0b84 | 1185 | (SCM port), |
bfc46627 GB |
1186 | "Returns the next character available from @var{port},\n" |
1187 | "@emph{without} updating @var{port} to point to the following\n" | |
1188 | "character. If no more characters are available, an end-of-file object\n" | |
1189 | "is returned.@footnote{The value returned by a call to @code{peek-char}\n" | |
1190 | "is the same as the value that would have been returned by a call to\n" | |
1191 | "@code{read-char} on the same port. The only difference is that the very\n" | |
1192 | "next call to @code{read-char} or @code{peek-char} on that\n" | |
1193 | "@var{port} will return the value returned by the preceding call to\n" | |
1194 | "@code{peek-char}. In particular, a call to @code{peek-char} on an\n" | |
1195 | "interactive port will hang waiting for input whenever a call to\n" | |
1196 | "@code{read-char} would have hung.}") | |
1bbd0b84 | 1197 | #define FUNC_NAME s_scm_peek_char |
ee149d03 JB |
1198 | { |
1199 | int c; | |
1200 | if (SCM_UNBNDP (port)) | |
1201 | port = scm_cur_inp; | |
1202 | else | |
3b3b36dd | 1203 | SCM_VALIDATE_OPINPORT (1,port); |
ee149d03 JB |
1204 | c = scm_getc (port); |
1205 | if (EOF == c) | |
1206 | return SCM_EOF_VAL; | |
1207 | scm_ungetc (c, port); | |
7866a09b | 1208 | return SCM_MAKE_CHAR (c); |
3cb988bd | 1209 | } |
1bbd0b84 | 1210 | #undef FUNC_NAME |
3cb988bd | 1211 | |
1be4270a | 1212 | SCM_DEFINE (scm_unread_char, "unread-char", 1, 1, 0, |
1bbd0b84 | 1213 | (SCM cobj, SCM port), |
b380b885 MD |
1214 | "Place @var{char} in @var{port} so that it will be read by the\n" |
1215 | "next read operation. If called multiple times, the unread characters\n" | |
1216 | "will be read again in last-in first-out order. If @var{port} is\n" | |
1217 | "not supplied, the current input port is used.") | |
1bbd0b84 | 1218 | #define FUNC_NAME s_scm_unread_char |
0f2d19dd JB |
1219 | { |
1220 | int c; | |
1221 | ||
7866a09b | 1222 | SCM_VALIDATE_CHAR (1,cobj); |
0f2d19dd JB |
1223 | if (SCM_UNBNDP (port)) |
1224 | port = scm_cur_inp; | |
1225 | else | |
3b3b36dd | 1226 | SCM_VALIDATE_OPINPORT (2,port); |
0f2d19dd | 1227 | |
7866a09b | 1228 | c = SCM_CHAR (cobj); |
0f2d19dd | 1229 | |
b7f3516f | 1230 | scm_ungetc (c, port); |
0f2d19dd JB |
1231 | return cobj; |
1232 | } | |
1bbd0b84 | 1233 | #undef FUNC_NAME |
0f2d19dd | 1234 | |
a1ec6916 | 1235 | SCM_DEFINE (scm_unread_string, "unread-string", 2, 0, 0, |
1bbd0b84 | 1236 | (SCM str, SCM port), |
b380b885 MD |
1237 | "Place the string @var{str} in @var{port} so that its characters will be\n" |
1238 | "read in subsequent read operations. If called multiple times, the\n" | |
1239 | "unread characters will be read again in last-in first-out order. If\n" | |
1240 | "@var{port} is not supplied, the current-input-port is used.") | |
1bbd0b84 | 1241 | #define FUNC_NAME s_scm_unread_string |
ee1e7e13 | 1242 | { |
3b3b36dd | 1243 | SCM_VALIDATE_STRING (1,str); |
ee1e7e13 MD |
1244 | if (SCM_UNBNDP (port)) |
1245 | port = scm_cur_inp; | |
1246 | else | |
3b3b36dd | 1247 | SCM_VALIDATE_OPINPORT (2,port); |
ee1e7e13 | 1248 | |
34f0f2b8 | 1249 | scm_ungets (SCM_STRING_CHARS (str), SCM_STRING_LENGTH (str), port); |
ee1e7e13 MD |
1250 | |
1251 | return str; | |
1252 | } | |
1bbd0b84 | 1253 | #undef FUNC_NAME |
ee1e7e13 | 1254 | |
a1ec6916 | 1255 | SCM_DEFINE (scm_seek, "seek", 3, 0, 0, |
1bbd0b84 | 1256 | (SCM object, SCM offset, SCM whence), |
b380b885 MD |
1257 | "Sets the current position of @var{fd/port} to the integer @var{offset},\n" |
1258 | "which is interpreted according to the value of @var{whence}.\n\n" | |
1259 | "One of the following variables should be supplied\n" | |
1260 | "for @var{whence}:\n" | |
1261 | "@defvar SEEK_SET\n" | |
1262 | "Seek from the beginning of the file.\n" | |
1263 | "@end defvar\n" | |
1264 | "@defvar SEEK_CUR\n" | |
1265 | "Seek from the current position.\n" | |
1266 | "@end defvar\n" | |
1267 | "@defvar SEEK_END\n" | |
1268 | "Seek from the end of the file.\n" | |
1269 | "@end defvar\n\n" | |
1270 | "If @var{fd/port} is a file descriptor, the underlying system call is\n" | |
1271 | "@code{lseek}. @var{port} may be a string port.\n\n" | |
1272 | "The value returned is the new position in the file. This means that\n" | |
1273 | "the current position of a port can be obtained using:\n" | |
1274 | "@smalllisp\n" | |
1275 | "(seek port 0 SEEK_CUR)\n" | |
1276 | "@end smalllisp") | |
1bbd0b84 | 1277 | #define FUNC_NAME s_scm_seek |
840ae05d JB |
1278 | { |
1279 | off_t off; | |
1280 | off_t rv; | |
1281 | int how; | |
1282 | ||
1283 | object = SCM_COERCE_OUTPORT (object); | |
1284 | ||
6fe692e9 MD |
1285 | off = SCM_NUM2LONG (2, offset); |
1286 | SCM_VALIDATE_INUM_COPY (3, whence, how); | |
840ae05d | 1287 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) |
1bbd0b84 | 1288 | SCM_OUT_OF_RANGE (3, whence); |
0c95b57d | 1289 | if (SCM_OPPORTP (object)) |
840ae05d | 1290 | { |
f12733c9 | 1291 | scm_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); |
840ae05d JB |
1292 | |
1293 | if (!ptob->seek) | |
1bbd0b84 GB |
1294 | SCM_MISC_ERROR ("port is not seekable", |
1295 | scm_cons (object, SCM_EOL)); | |
840ae05d | 1296 | else |
7dcb364d | 1297 | rv = ptob->seek (object, off, how); |
840ae05d JB |
1298 | } |
1299 | else /* file descriptor?. */ | |
1300 | { | |
3b3b36dd | 1301 | SCM_VALIDATE_INUM (1,object); |
840ae05d JB |
1302 | rv = lseek (SCM_INUM (object), off, how); |
1303 | if (rv == -1) | |
1bbd0b84 | 1304 | SCM_SYSERROR; |
840ae05d JB |
1305 | } |
1306 | return scm_long2num (rv); | |
1307 | } | |
1bbd0b84 | 1308 | #undef FUNC_NAME |
840ae05d | 1309 | |
a1ec6916 | 1310 | SCM_DEFINE (scm_truncate_file, "truncate-file", 1, 1, 0, |
1bbd0b84 | 1311 | (SCM object, SCM length), |
b380b885 MD |
1312 | "Truncates the object referred to by @var{obj} to at most @var{size} bytes.\n" |
1313 | "@var{obj} can be a string containing a file name or an integer file\n" | |
1314 | "descriptor or a port. @var{size} may be omitted if @var{obj} is not\n" | |
1315 | "a file name, in which case the truncation occurs at the current port.\n" | |
1316 | "position.\n\n" | |
1317 | "The return value is unspecified.") | |
1bbd0b84 | 1318 | #define FUNC_NAME s_scm_truncate_file |
840ae05d | 1319 | { |
69bc9ff3 GH |
1320 | int rv; |
1321 | off_t c_length; | |
1322 | ||
1323 | /* object can be a port, fdes or filename. */ | |
840ae05d | 1324 | |
840ae05d JB |
1325 | if (SCM_UNBNDP (length)) |
1326 | { | |
69bc9ff3 | 1327 | /* must supply length if object is a filename. */ |
a6d9e5ab | 1328 | if (SCM_STRINGP (object)) |
c1bfcf60 | 1329 | SCM_MISC_ERROR("must supply length if OBJECT is a filename",SCM_EOL); |
69bc9ff3 | 1330 | |
c94577b4 | 1331 | length = scm_seek (object, SCM_INUM0, SCM_MAKINUM (SEEK_CUR)); |
840ae05d | 1332 | } |
1bbd0b84 | 1333 | c_length = SCM_NUM2LONG (2,length); |
69bc9ff3 | 1334 | if (c_length < 0) |
1bbd0b84 | 1335 | SCM_MISC_ERROR ("negative offset", SCM_EOL); |
3fe6190f | 1336 | |
69bc9ff3 GH |
1337 | object = SCM_COERCE_OUTPORT (object); |
1338 | if (SCM_INUMP (object)) | |
1339 | { | |
1340 | SCM_SYSCALL (rv = ftruncate (SCM_INUM (object), c_length)); | |
1341 | } | |
0c95b57d | 1342 | else if (SCM_OPOUTPORTP (object)) |
69bc9ff3 GH |
1343 | { |
1344 | scm_port *pt = SCM_PTAB_ENTRY (object); | |
f12733c9 | 1345 | scm_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); |
69bc9ff3 | 1346 | |
affc96b5 | 1347 | if (!ptob->truncate) |
1bbd0b84 | 1348 | SCM_MISC_ERROR ("port is not truncatable", SCM_EOL); |
69bc9ff3 | 1349 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1350 | scm_end_input (object); |
69bc9ff3 | 1351 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1352 | ptob->flush (object); |
69bc9ff3 | 1353 | |
affc96b5 | 1354 | ptob->truncate (object, c_length); |
69bc9ff3 GH |
1355 | rv = 0; |
1356 | } | |
1357 | else | |
1358 | { | |
a6d9e5ab DH |
1359 | SCM_VALIDATE_STRING (1, object); |
1360 | SCM_STRING_COERCE_0TERMINATION_X (object); | |
1361 | SCM_SYSCALL (rv = truncate (SCM_STRING_CHARS (object), c_length)); | |
69bc9ff3 GH |
1362 | } |
1363 | if (rv == -1) | |
1bbd0b84 | 1364 | SCM_SYSERROR; |
840ae05d JB |
1365 | return SCM_UNSPECIFIED; |
1366 | } | |
1bbd0b84 | 1367 | #undef FUNC_NAME |
840ae05d | 1368 | |
a1ec6916 | 1369 | SCM_DEFINE (scm_port_line, "port-line", 1, 0, 0, |
1bbd0b84 | 1370 | (SCM port), |
e1546b65 | 1371 | "Return the current line number for @var{port}.") |
1bbd0b84 | 1372 | #define FUNC_NAME s_scm_port_line |
0f2d19dd | 1373 | { |
78446828 | 1374 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 1375 | SCM_VALIDATE_OPENPORT (1,port); |
360fc44c | 1376 | return SCM_MAKINUM (SCM_LINUM (port)); |
0f2d19dd | 1377 | } |
1bbd0b84 | 1378 | #undef FUNC_NAME |
0f2d19dd | 1379 | |
a1ec6916 | 1380 | SCM_DEFINE (scm_set_port_line_x, "set-port-line!", 2, 0, 0, |
1bbd0b84 | 1381 | (SCM port, SCM line), |
e1546b65 | 1382 | "Set the current line number for @var{port} to @var{line}.") |
1bbd0b84 | 1383 | #define FUNC_NAME s_scm_set_port_line_x |
d043d8c2 | 1384 | { |
360fc44c | 1385 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd GB |
1386 | SCM_VALIDATE_OPENPORT (1,port); |
1387 | SCM_VALIDATE_INUM (2,line); | |
564478fd GB |
1388 | SCM_PTAB_ENTRY (port)->line_number = SCM_INUM (line); |
1389 | return SCM_UNSPECIFIED; | |
d043d8c2 | 1390 | } |
1bbd0b84 | 1391 | #undef FUNC_NAME |
d043d8c2 | 1392 | |
a1ec6916 | 1393 | SCM_DEFINE (scm_port_column, "port-column", 1, 0, 0, |
1bbd0b84 | 1394 | (SCM port), |
b380b885 MD |
1395 | "@deffnx primitive port-line [input-port]\n" |
1396 | "Return the current column number or line number of @var{input-port},\n" | |
1397 | "using the current input port if none is specified. If the number is\n" | |
1398 | "unknown, the result is #f. Otherwise, the result is a 0-origin integer\n" | |
1399 | "- i.e. the first character of the first line is line 0, column 0.\n" | |
1400 | "(However, when you display a file position, for example in an error\n" | |
1401 | "message, we recommand you add 1 to get 1-origin integers. This is\n" | |
1402 | "because lines and column numbers traditionally start with 1, and that is\n" | |
1403 | "what non-programmers will find most natural.)") | |
1bbd0b84 | 1404 | #define FUNC_NAME s_scm_port_column |
0f2d19dd | 1405 | { |
78446828 | 1406 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 1407 | SCM_VALIDATE_OPENPORT (1,port); |
360fc44c | 1408 | return SCM_MAKINUM (SCM_COL (port)); |
0f2d19dd | 1409 | } |
1bbd0b84 | 1410 | #undef FUNC_NAME |
0f2d19dd | 1411 | |
a1ec6916 | 1412 | SCM_DEFINE (scm_set_port_column_x, "set-port-column!", 2, 0, 0, |
1bbd0b84 | 1413 | (SCM port, SCM column), |
92ccc1f1 NJ |
1414 | "@deffnx primitive set-port-line! port line\n" |
1415 | "Set the current column or line number of @var{port}, using the\n" | |
b380b885 | 1416 | "current input port if none is specified.") |
1bbd0b84 | 1417 | #define FUNC_NAME s_scm_set_port_column_x |
d043d8c2 | 1418 | { |
360fc44c | 1419 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd GB |
1420 | SCM_VALIDATE_OPENPORT (1,port); |
1421 | SCM_VALIDATE_INUM (2,column); | |
564478fd GB |
1422 | SCM_PTAB_ENTRY (port)->column_number = SCM_INUM (column); |
1423 | return SCM_UNSPECIFIED; | |
d043d8c2 | 1424 | } |
1bbd0b84 | 1425 | #undef FUNC_NAME |
d043d8c2 | 1426 | |
a1ec6916 | 1427 | SCM_DEFINE (scm_port_filename, "port-filename", 1, 0, 0, |
1bbd0b84 | 1428 | (SCM port), |
b380b885 | 1429 | "Return the filename associated with @var{port}. This function returns\n" |
2a2a730b | 1430 | "the strings \"standard input\", \"standard output\" and \"standard error\"\n" |
a3c8b9fc | 1431 | "when called on the current input, output and error ports respectively.") |
1bbd0b84 | 1432 | #define FUNC_NAME s_scm_port_filename |
0f2d19dd | 1433 | { |
78446828 | 1434 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 1435 | SCM_VALIDATE_OPENPORT (1,port); |
b24b5e13 | 1436 | return SCM_FILENAME (port); |
0f2d19dd | 1437 | } |
1bbd0b84 | 1438 | #undef FUNC_NAME |
0f2d19dd | 1439 | |
a1ec6916 | 1440 | SCM_DEFINE (scm_set_port_filename_x, "set-port-filename!", 2, 0, 0, |
1bbd0b84 | 1441 | (SCM port, SCM filename), |
b380b885 MD |
1442 | "Change the filename associated with @var{port}, using the current input\n" |
1443 | "port if none is specified. Note that this does not change the port's\n" | |
1444 | "source of data, but only the value that is returned by\n" | |
1445 | "@code{port-filename} and reported in diagnostic output.") | |
1bbd0b84 | 1446 | #define FUNC_NAME s_scm_set_port_filename_x |
d14af9f2 | 1447 | { |
360fc44c | 1448 | port = SCM_COERCE_OUTPORT (port); |
3b3b36dd | 1449 | SCM_VALIDATE_OPENPORT (1,port); |
360fc44c | 1450 | /* We allow the user to set the filename to whatever he likes. */ |
b24b5e13 DH |
1451 | SCM_SET_FILENAME (port, filename); |
1452 | return SCM_UNSPECIFIED; | |
d14af9f2 | 1453 | } |
1bbd0b84 | 1454 | #undef FUNC_NAME |
d14af9f2 | 1455 | |
0f2d19dd JB |
1456 | #ifndef ttyname |
1457 | extern char * ttyname(); | |
1458 | #endif | |
1459 | ||
f12733c9 MD |
1460 | void |
1461 | scm_print_port_mode (SCM exp, SCM port) | |
1462 | { | |
1463 | scm_puts (SCM_CLOSEDP (exp) | |
1464 | ? "closed: " | |
f9a64404 DH |
1465 | : (SCM_RDNG & SCM_CELL_WORD_0 (exp) |
1466 | ? (SCM_WRTNG & SCM_CELL_WORD_0 (exp) | |
f12733c9 MD |
1467 | ? "input-output: " |
1468 | : "input: ") | |
f9a64404 | 1469 | : (SCM_WRTNG & SCM_CELL_WORD_0 (exp) |
f12733c9 MD |
1470 | ? "output: " |
1471 | : "bogus: ")), | |
1472 | port); | |
1473 | } | |
1cc91f1b | 1474 | |
f12733c9 MD |
1475 | int |
1476 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate) | |
0f2d19dd | 1477 | { |
f12733c9 MD |
1478 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
1479 | if (!type) | |
1480 | type = "port"; | |
b7f3516f | 1481 | scm_puts ("#<", port); |
f12733c9 | 1482 | scm_print_port_mode (exp, port); |
b7f3516f TT |
1483 | scm_puts (type, port); |
1484 | scm_putc (' ', port); | |
12a8b769 | 1485 | scm_intprint (SCM_CELL_WORD_1 (exp), 16, port); |
b7f3516f | 1486 | scm_putc ('>', port); |
f12733c9 | 1487 | return 1; |
0f2d19dd JB |
1488 | } |
1489 | ||
0f2d19dd JB |
1490 | void |
1491 | scm_ports_prehistory () | |
0f2d19dd JB |
1492 | { |
1493 | scm_numptob = 0; | |
f12733c9 | 1494 | scm_ptobs = (scm_ptob_descriptor *) malloc (sizeof (scm_ptob_descriptor)); |
0f2d19dd | 1495 | } |
0f2d19dd JB |
1496 | |
1497 | \f | |
ee149d03 | 1498 | |
d68fee48 | 1499 | /* Void ports. */ |
0f2d19dd | 1500 | |
e841c3e0 | 1501 | scm_bits_t scm_tc16_void_port = 0; |
0f2d19dd | 1502 | |
70df8af6 | 1503 | static int fill_input_void_port (SCM port) |
283a1a0e | 1504 | { |
70df8af6 | 1505 | return EOF; |
283a1a0e GH |
1506 | } |
1507 | ||
31703ab8 | 1508 | static void |
8aa011a1 | 1509 | write_void_port (SCM port, const void *data, size_t size) |
31703ab8 GH |
1510 | { |
1511 | } | |
1512 | ||
0f2d19dd | 1513 | SCM |
a284e297 | 1514 | scm_void_port (char *mode_str) |
0f2d19dd JB |
1515 | { |
1516 | int mode_bits; | |
1517 | SCM answer; | |
840ae05d | 1518 | scm_port * pt; |
0f2d19dd JB |
1519 | |
1520 | SCM_NEWCELL (answer); | |
1521 | SCM_DEFER_INTS; | |
1522 | mode_bits = scm_mode_bits (mode_str); | |
1523 | pt = scm_add_to_port_table (answer); | |
70df8af6 | 1524 | scm_port_non_buffer (pt); |
0f2d19dd | 1525 | SCM_SETPTAB_ENTRY (answer, pt); |
ee149d03 | 1526 | SCM_SETSTREAM (answer, 0); |
54778cd3 | 1527 | SCM_SET_CELL_TYPE (answer, scm_tc16_void_port | mode_bits); |
0f2d19dd JB |
1528 | SCM_ALLOW_INTS; |
1529 | return answer; | |
1530 | } | |
1531 | ||
a1ec6916 | 1532 | SCM_DEFINE (scm_sys_make_void_port, "%make-void-port", 1, 0, 0, |
1bbd0b84 | 1533 | (SCM mode), |
70df8af6 GH |
1534 | "Create and return a new void port. A void port acts like\n" |
1535 | "/dev/null. The @var{mode} argument\n" | |
1536 | "specifies the input/output modes for this port: see the\n" | |
b380b885 | 1537 | "documentation for @code{open-file} in @ref{File Ports}.") |
1bbd0b84 | 1538 | #define FUNC_NAME s_scm_sys_make_void_port |
0f2d19dd | 1539 | { |
a6d9e5ab DH |
1540 | SCM_VALIDATE_STRING (1, mode); |
1541 | SCM_STRING_COERCE_0TERMINATION_X (mode); | |
1542 | return scm_void_port (SCM_STRING_CHARS (mode)); | |
0f2d19dd | 1543 | } |
1bbd0b84 | 1544 | #undef FUNC_NAME |
0f2d19dd | 1545 | |
0f2d19dd | 1546 | \f |
89545eba | 1547 | /* Initialization. */ |
1cc91f1b | 1548 | |
0f2d19dd JB |
1549 | void |
1550 | scm_init_ports () | |
0f2d19dd | 1551 | { |
840ae05d JB |
1552 | /* lseek() symbols. */ |
1553 | scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET)); | |
1554 | scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR)); | |
1555 | scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END)); | |
1556 | ||
70df8af6 GH |
1557 | scm_tc16_void_port = scm_make_port_type ("void", fill_input_void_port, |
1558 | write_void_port); | |
8dc9439f | 1559 | #ifndef SCM_MAGIC_SNARFER |
a0599745 | 1560 | #include "libguile/ports.x" |
8dc9439f | 1561 | #endif |
0f2d19dd | 1562 | } |
89e00824 ML |
1563 | |
1564 | /* | |
1565 | Local Variables: | |
1566 | c-file-style: "gnu" | |
1567 | End: | |
1568 | */ |