Commit | Line | Data |
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0af34a3f | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003, 2004, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
0f2d19dd | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
0f2d19dd | 20 | \f |
d68fee48 JB |
21 | /* Headers. */ |
22 | ||
2b829bbb KR |
23 | #define _LARGEFILE64_SOURCE /* ask for stat64 etc */ |
24 | ||
dbb605f5 | 25 | #ifdef HAVE_CONFIG_H |
bd515f37 RB |
26 | # include <config.h> |
27 | #endif | |
28 | ||
0f2d19dd | 29 | #include <stdio.h> |
e6e2e95a | 30 | #include <errno.h> |
8ab3d8a0 | 31 | #include <fcntl.h> /* for chsize on mingw */ |
b5cb4464 | 32 | #include <assert.h> |
889975e5 MG |
33 | #include <uniconv.h> |
34 | #include <unistr.h> | |
35 | #include <striconveh.h> | |
e6e2e95a | 36 | |
fca43887 LC |
37 | #include <assert.h> |
38 | ||
a0599745 | 39 | #include "libguile/_scm.h" |
4e047c3e | 40 | #include "libguile/async.h" |
f0942910 | 41 | #include "libguile/eval.h" |
8ab3d8a0 | 42 | #include "libguile/fports.h" /* direct access for seek and truncate */ |
9511876f | 43 | #include "libguile/goops.h" |
a0599745 MD |
44 | #include "libguile/smob.h" |
45 | #include "libguile/chars.h" | |
185e369a | 46 | #include "libguile/dynwind.h" |
0f2d19dd | 47 | |
a0599745 | 48 | #include "libguile/keywords.h" |
5dbc6c06 | 49 | #include "libguile/hashtab.h" |
a0599745 MD |
50 | #include "libguile/root.h" |
51 | #include "libguile/strings.h" | |
b42170a4 | 52 | #include "libguile/mallocs.h" |
a0599745 MD |
53 | #include "libguile/validate.h" |
54 | #include "libguile/ports.h" | |
3a5fb14d | 55 | #include "libguile/vectors.h" |
5dbc6c06 | 56 | #include "libguile/weaks.h" |
9de87eea | 57 | #include "libguile/fluids.h" |
889975e5 | 58 | #include "libguile/eq.h" |
0f2d19dd | 59 | |
bd9e24b3 GH |
60 | #ifdef HAVE_STRING_H |
61 | #include <string.h> | |
62 | #endif | |
63 | ||
ec65f5da MV |
64 | #ifdef HAVE_IO_H |
65 | #include <io.h> | |
66 | #endif | |
67 | ||
0f2d19dd JB |
68 | #ifdef HAVE_UNISTD_H |
69 | #include <unistd.h> | |
70 | #endif | |
71 | ||
95b88819 GH |
72 | #ifdef HAVE_SYS_IOCTL_H |
73 | #include <sys/ioctl.h> | |
74 | #endif | |
d68fee48 | 75 | |
8ab3d8a0 KR |
76 | /* Mingw (version 3.4.5, circa 2006) has ftruncate as an alias for chsize |
77 | already, but have this code here in case that wasn't so in past versions, | |
78 | or perhaps to help other minimal DOS environments. | |
79 | ||
80 | gnulib ftruncate.c has code using fcntl F_CHSIZE and F_FREESP, which | |
81 | might be possibilities if we've got other systems without ftruncate. */ | |
82 | ||
56a3dcd4 | 83 | #if defined HAVE_CHSIZE && ! defined HAVE_FTRUNCATE |
82893676 | 84 | #define ftruncate(fd, size) chsize (fd, size) |
8ab3d8a0 KR |
85 | #undef HAVE_FTRUNCATE |
86 | #define HAVE_FTRUNCATE 1 | |
82893676 MG |
87 | #endif |
88 | ||
0f2d19dd | 89 | \f |
d68fee48 | 90 | /* The port kind table --- a dynamically resized array of port types. */ |
0f2d19dd JB |
91 | |
92 | ||
93 | /* scm_ptobs scm_numptob | |
5dbc6c06 | 94 | * implement a dynamically resized array of ptob records. |
0f2d19dd JB |
95 | * Indexes into this table are used when generating type |
96 | * tags for smobjects (if you know a tag you can get an index and conversely). | |
97 | */ | |
dd3a26f3 AW |
98 | scm_t_ptob_descriptor *scm_ptobs = NULL; |
99 | long scm_numptob = 0; | |
0f2d19dd | 100 | |
ee149d03 | 101 | /* GC marker for a port with stream of SCM type. */ |
0f2d19dd | 102 | SCM |
a284e297 | 103 | scm_markstream (SCM ptr) |
0f2d19dd JB |
104 | { |
105 | int openp; | |
f9a64404 | 106 | openp = SCM_CELL_WORD_0 (ptr) & SCM_OPN; |
0f2d19dd | 107 | if (openp) |
74a16888 | 108 | return SCM_PACK (SCM_STREAM (ptr)); |
0f2d19dd JB |
109 | else |
110 | return SCM_BOOL_F; | |
111 | } | |
112 | ||
f12733c9 | 113 | /* |
f12733c9 | 114 | * We choose to use an interface similar to the smob interface with |
affc96b5 | 115 | * fill_input and write as standard fields, passed to the port |
f12733c9 MD |
116 | * type constructor, and optional fields set by setters. |
117 | */ | |
118 | ||
70df8af6 | 119 | static void |
e81d98ec | 120 | flush_port_default (SCM port SCM_UNUSED) |
70df8af6 GH |
121 | { |
122 | } | |
123 | ||
124 | static void | |
e81d98ec | 125 | end_input_default (SCM port SCM_UNUSED, int offset SCM_UNUSED) |
70df8af6 GH |
126 | { |
127 | } | |
0f2d19dd | 128 | |
92c2555f | 129 | scm_t_bits |
f12733c9 | 130 | scm_make_port_type (char *name, |
affc96b5 | 131 | int (*fill_input) (SCM port), |
8aa011a1 | 132 | void (*write) (SCM port, const void *data, size_t size)) |
0f2d19dd JB |
133 | { |
134 | char *tmp; | |
0953b549 | 135 | if (SCM_I_MAX_PORT_TYPE_COUNT - 1 <= scm_numptob) |
0f2d19dd | 136 | goto ptoberr; |
9de87eea | 137 | SCM_CRITICAL_SECTION_START; |
fca43887 LC |
138 | tmp = (char *) scm_gc_realloc ((char *) scm_ptobs, |
139 | scm_numptob * sizeof (scm_t_ptob_descriptor), | |
140 | (1 + scm_numptob) | |
141 | * sizeof (scm_t_ptob_descriptor), | |
142 | "port-type"); | |
0f2d19dd JB |
143 | if (tmp) |
144 | { | |
92c2555f | 145 | scm_ptobs = (scm_t_ptob_descriptor *) tmp; |
affc96b5 | 146 | |
f12733c9 MD |
147 | scm_ptobs[scm_numptob].name = name; |
148 | scm_ptobs[scm_numptob].mark = 0; | |
3051344b | 149 | scm_ptobs[scm_numptob].free = NULL; |
f12733c9 MD |
150 | scm_ptobs[scm_numptob].print = scm_port_print; |
151 | scm_ptobs[scm_numptob].equalp = 0; | |
affc96b5 GH |
152 | scm_ptobs[scm_numptob].close = 0; |
153 | ||
154 | scm_ptobs[scm_numptob].write = write; | |
70df8af6 | 155 | scm_ptobs[scm_numptob].flush = flush_port_default; |
affc96b5 | 156 | |
70df8af6 | 157 | scm_ptobs[scm_numptob].end_input = end_input_default; |
affc96b5 GH |
158 | scm_ptobs[scm_numptob].fill_input = fill_input; |
159 | scm_ptobs[scm_numptob].input_waiting = 0; | |
160 | ||
f12733c9 | 161 | scm_ptobs[scm_numptob].seek = 0; |
affc96b5 GH |
162 | scm_ptobs[scm_numptob].truncate = 0; |
163 | ||
0f2d19dd JB |
164 | scm_numptob++; |
165 | } | |
9de87eea | 166 | SCM_CRITICAL_SECTION_END; |
0f2d19dd | 167 | if (!tmp) |
2500356c DH |
168 | { |
169 | ptoberr: | |
170 | scm_memory_error ("scm_make_port_type"); | |
171 | } | |
f12733c9 | 172 | /* Make a class object if Goops is present */ |
63385df2 | 173 | if (SCM_UNPACK (scm_port_class[0]) != 0) |
f12733c9 | 174 | scm_make_port_classes (scm_numptob - 1, SCM_PTOBNAME (scm_numptob - 1)); |
0f2d19dd JB |
175 | return scm_tc7_port + (scm_numptob - 1) * 256; |
176 | } | |
177 | ||
f12733c9 | 178 | void |
23f2b9a3 | 179 | scm_set_port_mark (scm_t_bits tc, SCM (*mark) (SCM)) |
f12733c9 MD |
180 | { |
181 | scm_ptobs[SCM_TC2PTOBNUM (tc)].mark = mark; | |
182 | } | |
183 | ||
184 | void | |
23f2b9a3 | 185 | scm_set_port_free (scm_t_bits tc, size_t (*free) (SCM)) |
f12733c9 MD |
186 | { |
187 | scm_ptobs[SCM_TC2PTOBNUM (tc)].free = free; | |
188 | } | |
189 | ||
190 | void | |
23f2b9a3 | 191 | scm_set_port_print (scm_t_bits tc, int (*print) (SCM exp, SCM port, |
f12733c9 MD |
192 | scm_print_state *pstate)) |
193 | { | |
194 | scm_ptobs[SCM_TC2PTOBNUM (tc)].print = print; | |
195 | } | |
196 | ||
197 | void | |
23f2b9a3 | 198 | scm_set_port_equalp (scm_t_bits tc, SCM (*equalp) (SCM, SCM)) |
f12733c9 MD |
199 | { |
200 | scm_ptobs[SCM_TC2PTOBNUM (tc)].equalp = equalp; | |
201 | } | |
202 | ||
31703ab8 | 203 | void |
23f2b9a3 | 204 | scm_set_port_flush (scm_t_bits tc, void (*flush) (SCM port)) |
31703ab8 | 205 | { |
affc96b5 | 206 | scm_ptobs[SCM_TC2PTOBNUM (tc)].flush = flush; |
31703ab8 GH |
207 | } |
208 | ||
f12733c9 | 209 | void |
23f2b9a3 | 210 | scm_set_port_end_input (scm_t_bits tc, void (*end_input) (SCM port, int offset)) |
f12733c9 | 211 | { |
affc96b5 | 212 | scm_ptobs[SCM_TC2PTOBNUM (tc)].end_input = end_input; |
f12733c9 MD |
213 | } |
214 | ||
215 | void | |
23f2b9a3 | 216 | scm_set_port_close (scm_t_bits tc, int (*close) (SCM)) |
f12733c9 | 217 | { |
affc96b5 | 218 | scm_ptobs[SCM_TC2PTOBNUM (tc)].close = close; |
f12733c9 MD |
219 | } |
220 | ||
221 | void | |
f1ce9199 LC |
222 | scm_set_port_seek (scm_t_bits tc, |
223 | scm_t_off (*seek) (SCM, scm_t_off, int)) | |
f12733c9 MD |
224 | { |
225 | scm_ptobs[SCM_TC2PTOBNUM (tc)].seek = seek; | |
226 | } | |
227 | ||
228 | void | |
f1ce9199 | 229 | scm_set_port_truncate (scm_t_bits tc, void (*truncate) (SCM, scm_t_off)) |
f12733c9 | 230 | { |
affc96b5 | 231 | scm_ptobs[SCM_TC2PTOBNUM (tc)].truncate = truncate; |
f12733c9 MD |
232 | } |
233 | ||
234 | void | |
23f2b9a3 | 235 | scm_set_port_input_waiting (scm_t_bits tc, int (*input_waiting) (SCM)) |
f12733c9 | 236 | { |
affc96b5 | 237 | scm_ptobs[SCM_TC2PTOBNUM (tc)].input_waiting = input_waiting; |
f12733c9 MD |
238 | } |
239 | ||
0f2d19dd | 240 | \f |
0f2d19dd | 241 | |
3b3b36dd | 242 | SCM_DEFINE (scm_char_ready_p, "char-ready?", 0, 1, 0, |
1e6808ea MG |
243 | (SCM port), |
244 | "Return @code{#t} if a character is ready on input @var{port}\n" | |
245 | "and return @code{#f} otherwise. If @code{char-ready?} returns\n" | |
246 | "@code{#t} then the next @code{read-char} operation on\n" | |
247 | "@var{port} is guaranteed not to hang. If @var{port} is a file\n" | |
248 | "port at end of file then @code{char-ready?} returns @code{#t}.\n" | |
c2dfff19 KR |
249 | "\n" |
250 | "@code{char-ready?} exists to make it possible for a\n" | |
1e6808ea MG |
251 | "program to accept characters from interactive ports without\n" |
252 | "getting stuck waiting for input. Any input editors associated\n" | |
253 | "with such ports must make sure that characters whose existence\n" | |
254 | "has been asserted by @code{char-ready?} cannot be rubbed out.\n" | |
255 | "If @code{char-ready?} were to return @code{#f} at end of file,\n" | |
256 | "a port at end of file would be indistinguishable from an\n" | |
c2dfff19 | 257 | "interactive port that has no ready characters.") |
1bbd0b84 | 258 | #define FUNC_NAME s_scm_char_ready_p |
0f2d19dd | 259 | { |
92c2555f | 260 | scm_t_port *pt; |
6c951427 | 261 | |
0f2d19dd | 262 | if (SCM_UNBNDP (port)) |
9de87eea | 263 | port = scm_current_input_port (); |
b2456dd4 AW |
264 | /* It's possible to close the current input port, so validate even in |
265 | this case. */ | |
266 | SCM_VALIDATE_OPINPORT (1, port); | |
d68fee48 | 267 | |
ae4c4016 JB |
268 | pt = SCM_PTAB_ENTRY (port); |
269 | ||
6c951427 GH |
270 | /* if the current read buffer is filled, or the |
271 | last pushed-back char has been read and the saved buffer is | |
272 | filled, result is true. */ | |
273 | if (pt->read_pos < pt->read_end | |
274 | || (pt->read_buf == pt->putback_buf | |
275 | && pt->saved_read_pos < pt->saved_read_end)) | |
0f2d19dd | 276 | return SCM_BOOL_T; |
ee149d03 JB |
277 | else |
278 | { | |
92c2555f | 279 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
ee149d03 | 280 | |
affc96b5 | 281 | if (ptob->input_waiting) |
7888309b | 282 | return scm_from_bool(ptob->input_waiting (port)); |
ee149d03 | 283 | else |
6c951427 | 284 | return SCM_BOOL_T; |
ee149d03 | 285 | } |
0f2d19dd | 286 | } |
1bbd0b84 | 287 | #undef FUNC_NAME |
0f2d19dd | 288 | |
c2da2648 GH |
289 | /* move up to read_len chars from port's putback and/or read buffers |
290 | into memory starting at dest. returns the number of chars moved. */ | |
291 | size_t scm_take_from_input_buffers (SCM port, char *dest, size_t read_len) | |
292 | { | |
92c2555f | 293 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
c2da2648 GH |
294 | size_t chars_read = 0; |
295 | size_t from_buf = min (pt->read_end - pt->read_pos, read_len); | |
296 | ||
297 | if (from_buf > 0) | |
298 | { | |
299 | memcpy (dest, pt->read_pos, from_buf); | |
300 | pt->read_pos += from_buf; | |
301 | chars_read += from_buf; | |
302 | read_len -= from_buf; | |
303 | dest += from_buf; | |
304 | } | |
305 | ||
306 | /* if putback was active, try the real input buffer too. */ | |
307 | if (pt->read_buf == pt->putback_buf) | |
308 | { | |
309 | from_buf = min (pt->saved_read_end - pt->saved_read_pos, read_len); | |
310 | if (from_buf > 0) | |
311 | { | |
312 | memcpy (dest, pt->saved_read_pos, from_buf); | |
313 | pt->saved_read_pos += from_buf; | |
314 | chars_read += from_buf; | |
315 | } | |
316 | } | |
317 | return chars_read; | |
318 | } | |
319 | ||
6c951427 | 320 | /* Clear a port's read buffers, returning the contents. */ |
a1ec6916 | 321 | SCM_DEFINE (scm_drain_input, "drain-input", 1, 0, 0, |
1bbd0b84 | 322 | (SCM port), |
4a151b3d GH |
323 | "This procedure clears a port's input buffers, similar\n" |
324 | "to the way that force-output clears the output buffer. The\n" | |
325 | "contents of the buffers are returned as a single string, e.g.,\n" | |
326 | "\n" | |
327 | "@lisp\n" | |
328 | "(define p (open-input-file ...))\n" | |
329 | "(drain-input p) => empty string, nothing buffered yet.\n" | |
330 | "(unread-char (read-char p) p)\n" | |
331 | "(drain-input p) => initial chars from p, up to the buffer size.\n" | |
332 | "@end lisp\n\n" | |
333 | "Draining the buffers may be useful for cleanly finishing\n" | |
334 | "buffered I/O so that the file descriptor can be used directly\n" | |
335 | "for further input.") | |
1bbd0b84 | 336 | #define FUNC_NAME s_scm_drain_input |
ee149d03 | 337 | { |
840ae05d | 338 | SCM result; |
3a5fb14d | 339 | char *data; |
28a6e1b0 | 340 | scm_t_port *pt; |
c014a02e | 341 | long count; |
ee149d03 | 342 | |
34d19ef6 | 343 | SCM_VALIDATE_OPINPORT (1, port); |
28a6e1b0 | 344 | pt = SCM_PTAB_ENTRY (port); |
840ae05d | 345 | |
6c951427 GH |
346 | count = pt->read_end - pt->read_pos; |
347 | if (pt->read_buf == pt->putback_buf) | |
348 | count += pt->saved_read_end - pt->saved_read_pos; | |
840ae05d | 349 | |
67a72dc1 AW |
350 | if (count) |
351 | { | |
352 | result = scm_i_make_string (count, &data); | |
353 | scm_take_from_input_buffers (port, data, count); | |
354 | } | |
355 | else | |
356 | result = scm_nullstr; | |
357 | ||
840ae05d | 358 | return result; |
ee149d03 | 359 | } |
1bbd0b84 | 360 | #undef FUNC_NAME |
0f2d19dd JB |
361 | |
362 | \f | |
d68fee48 | 363 | /* Standard ports --- current input, output, error, and more(!). */ |
0f2d19dd | 364 | |
889975e5 MG |
365 | static SCM cur_inport_fluid = 0; |
366 | static SCM cur_outport_fluid = 0; | |
367 | static SCM cur_errport_fluid = 0; | |
368 | static SCM cur_loadport_fluid = 0; | |
9de87eea | 369 | |
3b3b36dd | 370 | SCM_DEFINE (scm_current_input_port, "current-input-port", 0, 0, 0, |
e1546b65 MG |
371 | (), |
372 | "Return the current input port. This is the default port used\n" | |
373 | "by many input procedures. Initially, @code{current-input-port}\n" | |
374 | "returns the @dfn{standard input} in Unix and C terminology.") | |
1bbd0b84 | 375 | #define FUNC_NAME s_scm_current_input_port |
0f2d19dd | 376 | { |
889975e5 MG |
377 | if (cur_inport_fluid) |
378 | return scm_fluid_ref (cur_inport_fluid); | |
379 | else | |
380 | return SCM_BOOL_F; | |
0f2d19dd | 381 | } |
1bbd0b84 | 382 | #undef FUNC_NAME |
0f2d19dd | 383 | |
3b3b36dd | 384 | SCM_DEFINE (scm_current_output_port, "current-output-port", 0, 0, 0, |
e1546b65 MG |
385 | (), |
386 | "Return the current output port. This is the default port used\n" | |
9401323e | 387 | "by many output procedures. Initially,\n" |
e1546b65 MG |
388 | "@code{current-output-port} returns the @dfn{standard output} in\n" |
389 | "Unix and C terminology.") | |
1bbd0b84 | 390 | #define FUNC_NAME s_scm_current_output_port |
0f2d19dd | 391 | { |
889975e5 MG |
392 | if (cur_outport_fluid) |
393 | return scm_fluid_ref (cur_outport_fluid); | |
394 | else | |
395 | return SCM_BOOL_F; | |
0f2d19dd | 396 | } |
1bbd0b84 | 397 | #undef FUNC_NAME |
0f2d19dd | 398 | |
3b3b36dd | 399 | SCM_DEFINE (scm_current_error_port, "current-error-port", 0, 0, 0, |
1bbd0b84 | 400 | (), |
b380b885 MD |
401 | "Return the port to which errors and warnings should be sent (the\n" |
402 | "@dfn{standard error} in Unix and C terminology).") | |
1bbd0b84 | 403 | #define FUNC_NAME s_scm_current_error_port |
0f2d19dd | 404 | { |
889975e5 MG |
405 | if (cur_errport_fluid) |
406 | return scm_fluid_ref (cur_errport_fluid); | |
407 | else | |
408 | return SCM_BOOL_F; | |
0f2d19dd | 409 | } |
1bbd0b84 | 410 | #undef FUNC_NAME |
0f2d19dd | 411 | |
3b3b36dd | 412 | SCM_DEFINE (scm_current_load_port, "current-load-port", 0, 0, 0, |
e1546b65 | 413 | (), |
b450f070 | 414 | "Return the current-load-port.\n" |
e1546b65 | 415 | "The load port is used internally by @code{primitive-load}.") |
1bbd0b84 | 416 | #define FUNC_NAME s_scm_current_load_port |
31614d8e | 417 | { |
9de87eea | 418 | return scm_fluid_ref (cur_loadport_fluid); |
31614d8e | 419 | } |
1bbd0b84 | 420 | #undef FUNC_NAME |
31614d8e | 421 | |
3b3b36dd | 422 | SCM_DEFINE (scm_set_current_input_port, "set-current-input-port", 1, 0, 0, |
1bbd0b84 | 423 | (SCM port), |
8f85c0c6 NJ |
424 | "@deffnx {Scheme Procedure} set-current-output-port port\n" |
425 | "@deffnx {Scheme Procedure} set-current-error-port port\n" | |
b380b885 MD |
426 | "Change the ports returned by @code{current-input-port},\n" |
427 | "@code{current-output-port} and @code{current-error-port}, respectively,\n" | |
428 | "so that they use the supplied @var{port} for input or output.") | |
1bbd0b84 | 429 | #define FUNC_NAME s_scm_set_current_input_port |
0f2d19dd | 430 | { |
9de87eea | 431 | SCM oinp = scm_fluid_ref (cur_inport_fluid); |
34d19ef6 | 432 | SCM_VALIDATE_OPINPORT (1, port); |
9de87eea | 433 | scm_fluid_set_x (cur_inport_fluid, port); |
0f2d19dd JB |
434 | return oinp; |
435 | } | |
1bbd0b84 | 436 | #undef FUNC_NAME |
0f2d19dd JB |
437 | |
438 | ||
3b3b36dd | 439 | SCM_DEFINE (scm_set_current_output_port, "set-current-output-port", 1, 0, 0, |
e1546b65 MG |
440 | (SCM port), |
441 | "Set the current default output port to @var{port}.") | |
1bbd0b84 | 442 | #define FUNC_NAME s_scm_set_current_output_port |
0f2d19dd | 443 | { |
9de87eea | 444 | SCM ooutp = scm_fluid_ref (cur_outport_fluid); |
78446828 | 445 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 446 | SCM_VALIDATE_OPOUTPORT (1, port); |
9de87eea | 447 | scm_fluid_set_x (cur_outport_fluid, port); |
0f2d19dd JB |
448 | return ooutp; |
449 | } | |
1bbd0b84 | 450 | #undef FUNC_NAME |
0f2d19dd JB |
451 | |
452 | ||
3b3b36dd | 453 | SCM_DEFINE (scm_set_current_error_port, "set-current-error-port", 1, 0, 0, |
e1546b65 MG |
454 | (SCM port), |
455 | "Set the current default error port to @var{port}.") | |
1bbd0b84 | 456 | #define FUNC_NAME s_scm_set_current_error_port |
0f2d19dd | 457 | { |
9de87eea | 458 | SCM oerrp = scm_fluid_ref (cur_errport_fluid); |
78446828 | 459 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 460 | SCM_VALIDATE_OPOUTPORT (1, port); |
9de87eea | 461 | scm_fluid_set_x (cur_errport_fluid, port); |
0f2d19dd JB |
462 | return oerrp; |
463 | } | |
1bbd0b84 | 464 | #undef FUNC_NAME |
0f2d19dd | 465 | |
185e369a | 466 | void |
661ae7ab | 467 | scm_dynwind_current_input_port (SCM port) |
9de87eea | 468 | #define FUNC_NAME NULL |
185e369a | 469 | { |
9de87eea | 470 | SCM_VALIDATE_OPINPORT (1, port); |
661ae7ab | 471 | scm_dynwind_fluid (cur_inport_fluid, port); |
185e369a | 472 | } |
9de87eea | 473 | #undef FUNC_NAME |
185e369a MV |
474 | |
475 | void | |
661ae7ab | 476 | scm_dynwind_current_output_port (SCM port) |
9de87eea | 477 | #define FUNC_NAME NULL |
185e369a | 478 | { |
9de87eea MV |
479 | port = SCM_COERCE_OUTPORT (port); |
480 | SCM_VALIDATE_OPOUTPORT (1, port); | |
661ae7ab | 481 | scm_dynwind_fluid (cur_outport_fluid, port); |
185e369a | 482 | } |
9de87eea | 483 | #undef FUNC_NAME |
185e369a MV |
484 | |
485 | void | |
661ae7ab | 486 | scm_dynwind_current_error_port (SCM port) |
9de87eea MV |
487 | #define FUNC_NAME NULL |
488 | { | |
489 | port = SCM_COERCE_OUTPORT (port); | |
490 | SCM_VALIDATE_OPOUTPORT (1, port); | |
661ae7ab | 491 | scm_dynwind_fluid (cur_errport_fluid, port); |
9de87eea MV |
492 | } |
493 | #undef FUNC_NAME | |
494 | ||
495 | void | |
661ae7ab | 496 | scm_i_dynwind_current_load_port (SCM port) |
185e369a | 497 | { |
661ae7ab | 498 | scm_dynwind_fluid (cur_loadport_fluid, port); |
185e369a MV |
499 | } |
500 | ||
0f2d19dd | 501 | \f |
840ae05d | 502 | /* The port table --- an array of pointers to ports. */ |
0f2d19dd | 503 | |
5dbc6c06 HWN |
504 | /* |
505 | We need a global registry of ports to flush them all at exit, and to | |
506 | get all the ports matching a file descriptor. | |
507 | */ | |
508 | SCM scm_i_port_weak_hash; | |
0f2d19dd | 509 | |
9de87eea | 510 | scm_i_pthread_mutex_t scm_i_port_table_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
b9ad392e | 511 | |
651a0735 LC |
512 | \f |
513 | /* Port finalization. */ | |
514 | ||
1cc91f1b | 515 | |
651a0735 LC |
516 | static void finalize_port (GC_PTR, GC_PTR); |
517 | ||
518 | /* Register a finalizer for PORT, if needed by its port type. */ | |
519 | static SCM_C_INLINE_KEYWORD void | |
520 | register_finalizer_for_port (SCM port) | |
521 | { | |
522 | long port_type; | |
523 | ||
524 | port_type = SCM_TC2PTOBNUM (SCM_CELL_TYPE (port)); | |
525 | if (scm_ptobs[port_type].free) | |
526 | { | |
527 | GC_finalization_proc prev_finalizer; | |
528 | GC_PTR prev_finalization_data; | |
529 | ||
530 | GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (port), finalize_port, 0, | |
531 | &prev_finalizer, | |
532 | &prev_finalization_data); | |
533 | } | |
534 | } | |
535 | ||
536 | /* Finalize the object (a port) pointed to by PTR. */ | |
537 | static void | |
538 | finalize_port (GC_PTR ptr, GC_PTR data) | |
539 | { | |
540 | long port_type; | |
541 | SCM port = PTR2SCM (ptr); | |
542 | ||
543 | if (!SCM_PORTP (port)) | |
544 | abort (); | |
545 | ||
546 | if (SCM_OPENP (port)) | |
547 | { | |
548 | if (SCM_REVEALED (port) > 0) | |
549 | /* Keep "revealed" ports alive and re-register a finalizer. */ | |
550 | register_finalizer_for_port (port); | |
551 | else | |
552 | { | |
553 | port_type = SCM_TC2PTOBNUM (SCM_CELL_TYPE (port)); | |
554 | if (port_type >= scm_numptob) | |
555 | abort (); | |
556 | ||
557 | if (scm_ptobs[port_type].free) | |
558 | /* Yes, I really do mean `.free' rather than `.close'. `.close' | |
559 | is for explicit `close-port' by user. */ | |
560 | scm_ptobs[port_type].free (port); | |
561 | ||
562 | SCM_SETSTREAM (port, 0); | |
563 | SCM_CLR_PORT_OPEN_FLAG (port); | |
651a0735 LC |
564 | |
565 | scm_gc_ports_collected++; | |
566 | } | |
567 | } | |
568 | } | |
569 | ||
570 | ||
571 | ||
572 | \f | |
573 | ||
574 | /* This function is not and should not be thread safe. */ | |
da220f27 HWN |
575 | SCM |
576 | scm_new_port_table_entry (scm_t_bits tag) | |
402788a9 | 577 | #define FUNC_NAME "scm_new_port_table_entry" |
0f2d19dd | 578 | { |
85835e59 HWN |
579 | /* |
580 | We initialize the cell to empty, this is in case scm_gc_calloc | |
581 | triggers GC ; we don't want the GC to scan a half-finished Z. | |
582 | */ | |
583 | ||
67329a9e | 584 | SCM z = scm_cons (SCM_EOL, SCM_EOL); |
39e8f371 | 585 | scm_t_port *entry = (scm_t_port *) scm_gc_calloc (sizeof (scm_t_port), "port"); |
889975e5 | 586 | const char *enc; |
5f16b897 | 587 | |
840ae05d | 588 | entry->file_name = SCM_BOOL_F; |
61e452ba | 589 | entry->rw_active = SCM_PORT_NEITHER; |
5dbc6c06 | 590 | entry->port = z; |
889975e5 MG |
591 | /* Initialize this port with the thread's current default |
592 | encoding. */ | |
593 | if ((enc = scm_i_get_port_encoding (SCM_BOOL_F)) == NULL) | |
594 | entry->encoding = NULL; | |
595 | else | |
682d78d0 | 596 | entry->encoding = scm_gc_strdup (enc, "port"); |
889975e5 | 597 | entry->ilseq_handler = scm_i_get_conversion_strategy (SCM_BOOL_F); |
5f16b897 | 598 | |
5dbc6c06 HWN |
599 | SCM_SET_CELL_TYPE (z, tag); |
600 | SCM_SETPTAB_ENTRY (z, entry); | |
840ae05d | 601 | |
5dbc6c06 | 602 | scm_hashq_set_x (scm_i_port_weak_hash, z, SCM_BOOL_F); |
651a0735 LC |
603 | |
604 | /* For each new port, register a finalizer so that it port type's free | |
605 | function can be invoked eventually. */ | |
606 | register_finalizer_for_port (z); | |
607 | ||
da220f27 | 608 | return z; |
0f2d19dd | 609 | } |
c6c79933 | 610 | #undef FUNC_NAME |
0f2d19dd | 611 | |
67329a9e HWN |
612 | #if SCM_ENABLE_DEPRECATED==1 |
613 | SCM_API scm_t_port * | |
614 | scm_add_to_port_table (SCM port) | |
615 | { | |
616 | SCM z = scm_new_port_table_entry (scm_tc7_port); | |
617 | scm_t_port * pt = SCM_PTAB_ENTRY(z); | |
618 | ||
619 | pt->port = port; | |
5dbc6c06 HWN |
620 | SCM_SETCAR (z, SCM_EOL); |
621 | SCM_SETCDR (z, SCM_EOL); | |
85835e59 | 622 | SCM_SETPTAB_ENTRY (port, pt); |
67329a9e HWN |
623 | return pt; |
624 | } | |
625 | #endif | |
626 | ||
627 | ||
6c951427 | 628 | /* Remove a port from the table and destroy it. */ |
b9ad392e MD |
629 | |
630 | /* This function is not and should not be thread safe. */ | |
0f2d19dd | 631 | void |
5dbc6c06 HWN |
632 | scm_i_remove_port (SCM port) |
633 | #define FUNC_NAME "scm_remove_port" | |
0f2d19dd | 634 | { |
92c2555f | 635 | scm_t_port *p = SCM_PTAB_ENTRY (port); |
682d78d0 LC |
636 | |
637 | scm_port_non_buffer (p); | |
638 | ||
639 | p->putback_buf = NULL; | |
640 | p->putback_buf_size = 0; | |
5dbc6c06 | 641 | |
0f2d19dd | 642 | SCM_SETPTAB_ENTRY (port, 0); |
5dbc6c06 | 643 | scm_hashq_remove_x (scm_i_port_weak_hash, port); |
0f2d19dd | 644 | } |
db4b4ca6 DH |
645 | #undef FUNC_NAME |
646 | ||
0f2d19dd | 647 | |
b450f070 | 648 | /* Functions for debugging. */ |
5dbc6c06 | 649 | #ifdef GUILE_DEBUG |
3b3b36dd | 650 | SCM_DEFINE (scm_pt_size, "pt-size", 0, 0, 0, |
b450f070 | 651 | (), |
1e6808ea | 652 | "Return the number of ports in the port table. @code{pt-size}\n" |
5352393c | 653 | "is only included in @code{--enable-guile-debug} builds.") |
1bbd0b84 | 654 | #define FUNC_NAME s_scm_pt_size |
0f2d19dd | 655 | { |
5dbc6c06 | 656 | return scm_from_int (SCM_HASHTABLE_N_ITEMS (scm_i_port_weak_hash)); |
0f2d19dd | 657 | } |
1bbd0b84 | 658 | #undef FUNC_NAME |
0f2d19dd JB |
659 | #endif |
660 | ||
70df8af6 | 661 | void |
92c2555f | 662 | scm_port_non_buffer (scm_t_port *pt) |
70df8af6 GH |
663 | { |
664 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; | |
665 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
666 | pt->read_buf_size = pt->write_buf_size = 1; | |
667 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
668 | } | |
0f2d19dd | 669 | |
d68fee48 JB |
670 | \f |
671 | /* Revealed counts --- an oddity inherited from SCSH. */ | |
672 | ||
8b13c6b3 GH |
673 | /* Find a port in the table and return its revealed count. |
674 | Also used by the garbage collector. | |
0f2d19dd | 675 | */ |
1cc91f1b | 676 | |
0f2d19dd | 677 | int |
a284e297 | 678 | scm_revealed_count (SCM port) |
0f2d19dd JB |
679 | { |
680 | return SCM_REVEALED(port); | |
681 | } | |
682 | ||
683 | ||
684 | ||
685 | /* Return the revealed count for a port. */ | |
686 | ||
3b3b36dd | 687 | SCM_DEFINE (scm_port_revealed, "port-revealed", 1, 0, 0, |
1bbd0b84 | 688 | (SCM port), |
1e6808ea | 689 | "Return the revealed count for @var{port}.") |
1bbd0b84 | 690 | #define FUNC_NAME s_scm_port_revealed |
0f2d19dd | 691 | { |
78446828 | 692 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 693 | SCM_VALIDATE_OPENPORT (1, port); |
e11e83f3 | 694 | return scm_from_int (scm_revealed_count (port)); |
0f2d19dd | 695 | } |
1bbd0b84 | 696 | #undef FUNC_NAME |
0f2d19dd JB |
697 | |
698 | /* Set the revealed count for a port. */ | |
3b3b36dd | 699 | SCM_DEFINE (scm_set_port_revealed_x, "set-port-revealed!", 2, 0, 0, |
1bbd0b84 | 700 | (SCM port, SCM rcount), |
b450f070 | 701 | "Sets the revealed count for a port to a given value.\n" |
b380b885 | 702 | "The return value is unspecified.") |
1bbd0b84 | 703 | #define FUNC_NAME s_scm_set_port_revealed_x |
0f2d19dd | 704 | { |
78446828 | 705 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 706 | SCM_VALIDATE_OPENPORT (1, port); |
a55c2b68 | 707 | SCM_REVEALED (port) = scm_to_int (rcount); |
8b13c6b3 | 708 | return SCM_UNSPECIFIED; |
0f2d19dd | 709 | } |
1bbd0b84 | 710 | #undef FUNC_NAME |
0f2d19dd | 711 | |
d68fee48 JB |
712 | |
713 | \f | |
714 | /* Retrieving a port's mode. */ | |
715 | ||
eadd48de GH |
716 | /* Return the flags that characterize a port based on the mode |
717 | * string used to open a file for that port. | |
718 | * | |
719 | * See PORT FLAGS in scm.h | |
720 | */ | |
721 | ||
3a5fb14d | 722 | static long |
889975e5 | 723 | scm_i_mode_bits_n (SCM modes) |
3a5fb14d MV |
724 | { |
725 | return (SCM_OPN | |
889975e5 MG |
726 | | (scm_i_string_contains_char (modes, 'r') |
727 | || scm_i_string_contains_char (modes, '+') ? SCM_RDNG : 0) | |
728 | | (scm_i_string_contains_char (modes, 'w') | |
729 | || scm_i_string_contains_char (modes, 'a') | |
730 | || scm_i_string_contains_char (modes, '+') ? SCM_WRTNG : 0) | |
731 | | (scm_i_string_contains_char (modes, '0') ? SCM_BUF0 : 0) | |
732 | | (scm_i_string_contains_char (modes, 'l') ? SCM_BUFLINE : 0)); | |
3a5fb14d MV |
733 | } |
734 | ||
eadd48de | 735 | long |
a284e297 | 736 | scm_mode_bits (char *modes) |
eadd48de | 737 | { |
889975e5 | 738 | return scm_i_mode_bits (scm_from_locale_string (modes)); |
eadd48de GH |
739 | } |
740 | ||
d617ee18 MV |
741 | long |
742 | scm_i_mode_bits (SCM modes) | |
743 | { | |
744 | long bits; | |
745 | ||
746 | if (!scm_is_string (modes)) | |
747 | scm_wrong_type_arg_msg (NULL, 0, modes, "string"); | |
748 | ||
889975e5 | 749 | bits = scm_i_mode_bits_n (modes); |
d617ee18 MV |
750 | scm_remember_upto_here_1 (modes); |
751 | return bits; | |
752 | } | |
eadd48de GH |
753 | |
754 | /* Return the mode flags from an open port. | |
755 | * Some modes such as "append" are only used when opening | |
756 | * a file and are not returned here. */ | |
757 | ||
3b3b36dd | 758 | SCM_DEFINE (scm_port_mode, "port-mode", 1, 0, 0, |
1bbd0b84 | 759 | (SCM port), |
1e6808ea MG |
760 | "Return the port modes associated with the open port @var{port}.\n" |
761 | "These will not necessarily be identical to the modes used when\n" | |
762 | "the port was opened, since modes such as \"append\" which are\n" | |
763 | "used only during port creation are not retained.") | |
1bbd0b84 | 764 | #define FUNC_NAME s_scm_port_mode |
eadd48de | 765 | { |
26a3038d | 766 | char modes[4]; |
eadd48de | 767 | modes[0] = '\0'; |
78446828 MV |
768 | |
769 | port = SCM_COERCE_OUTPORT (port); | |
34d19ef6 | 770 | SCM_VALIDATE_OPPORT (1, port); |
f9a64404 DH |
771 | if (SCM_CELL_WORD_0 (port) & SCM_RDNG) { |
772 | if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) | |
eadd48de GH |
773 | strcpy (modes, "r+"); |
774 | else | |
775 | strcpy (modes, "r"); | |
776 | } | |
f9a64404 | 777 | else if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) |
eadd48de | 778 | strcpy (modes, "w"); |
f9a64404 | 779 | if (SCM_CELL_WORD_0 (port) & SCM_BUF0) |
eadd48de | 780 | strcat (modes, "0"); |
3a5fb14d | 781 | return scm_from_locale_string (modes); |
eadd48de | 782 | } |
1bbd0b84 | 783 | #undef FUNC_NAME |
eadd48de GH |
784 | |
785 | ||
d68fee48 JB |
786 | \f |
787 | /* Closing ports. */ | |
788 | ||
0f2d19dd JB |
789 | /* scm_close_port |
790 | * Call the close operation on a port object. | |
eadd48de | 791 | * see also scm_close. |
0f2d19dd | 792 | */ |
3b3b36dd | 793 | SCM_DEFINE (scm_close_port, "close-port", 1, 0, 0, |
1bbd0b84 | 794 | (SCM port), |
1e6808ea MG |
795 | "Close the specified port object. Return @code{#t} if it\n" |
796 | "successfully closes a port or @code{#f} if it was already\n" | |
797 | "closed. An exception may be raised if an error occurs, for\n" | |
798 | "example when flushing buffered output. See also @ref{Ports and\n" | |
799 | "File Descriptors, close}, for a procedure which can close file\n" | |
800 | "descriptors.") | |
1bbd0b84 | 801 | #define FUNC_NAME s_scm_close_port |
0f2d19dd | 802 | { |
1be6b49c | 803 | size_t i; |
eadd48de GH |
804 | int rv; |
805 | ||
78446828 MV |
806 | port = SCM_COERCE_OUTPORT (port); |
807 | ||
7a754ca6 | 808 | SCM_VALIDATE_PORT (1, port); |
0f2d19dd | 809 | if (SCM_CLOSEDP (port)) |
eadd48de | 810 | return SCM_BOOL_F; |
0f2d19dd | 811 | i = SCM_PTOBNUM (port); |
affc96b5 GH |
812 | if (scm_ptobs[i].close) |
813 | rv = (scm_ptobs[i].close) (port); | |
eadd48de GH |
814 | else |
815 | rv = 0; | |
9de87eea | 816 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
5dbc6c06 | 817 | scm_i_remove_port (port); |
9de87eea | 818 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
22a52da1 | 819 | SCM_CLR_PORT_OPEN_FLAG (port); |
7888309b | 820 | return scm_from_bool (rv >= 0); |
7a754ca6 MD |
821 | } |
822 | #undef FUNC_NAME | |
823 | ||
824 | SCM_DEFINE (scm_close_input_port, "close-input-port", 1, 0, 0, | |
825 | (SCM port), | |
826 | "Close the specified input port object. The routine has no effect if\n" | |
827 | "the file has already been closed. An exception may be raised if an\n" | |
828 | "error occurs. The value returned is unspecified.\n\n" | |
829 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
830 | "which can close file descriptors.") | |
831 | #define FUNC_NAME s_scm_close_input_port | |
832 | { | |
833 | SCM_VALIDATE_INPUT_PORT (1, port); | |
834 | scm_close_port (port); | |
835 | return SCM_UNSPECIFIED; | |
836 | } | |
837 | #undef FUNC_NAME | |
838 | ||
839 | SCM_DEFINE (scm_close_output_port, "close-output-port", 1, 0, 0, | |
840 | (SCM port), | |
841 | "Close the specified output port object. The routine has no effect if\n" | |
842 | "the file has already been closed. An exception may be raised if an\n" | |
843 | "error occurs. The value returned is unspecified.\n\n" | |
844 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
845 | "which can close file descriptors.") | |
846 | #define FUNC_NAME s_scm_close_output_port | |
847 | { | |
848 | port = SCM_COERCE_OUTPORT (port); | |
849 | SCM_VALIDATE_OUTPUT_PORT (1, port); | |
850 | scm_close_port (port); | |
851 | return SCM_UNSPECIFIED; | |
0f2d19dd | 852 | } |
1bbd0b84 | 853 | #undef FUNC_NAME |
0f2d19dd | 854 | |
5dbc6c06 HWN |
855 | static SCM |
856 | scm_i_collect_keys_in_vector (void *closure, SCM key, SCM value, SCM result) | |
857 | { | |
858 | int *i = (int*) closure; | |
859 | scm_c_vector_set_x (result, *i, key); | |
860 | (*i)++; | |
861 | ||
862 | return result; | |
863 | } | |
864 | ||
c536b4b3 MV |
865 | void |
866 | scm_c_port_for_each (void (*proc)(void *data, SCM p), void *data) | |
c2ca4493 | 867 | { |
5dbc6c06 | 868 | int i = 0; |
3a5fb14d | 869 | size_t n; |
fdfe6305 MV |
870 | SCM ports; |
871 | ||
fdfe6305 MV |
872 | /* Even without pre-emptive multithreading, running arbitrary code |
873 | while scanning the port table is unsafe because the port table | |
3a5fb14d MV |
874 | can change arbitrarily (from a GC, for example). So we first |
875 | collect the ports into a vector. -mvo */ | |
fdfe6305 | 876 | |
9de87eea | 877 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
5dbc6c06 | 878 | n = SCM_HASHTABLE_N_ITEMS (scm_i_port_weak_hash); |
9de87eea | 879 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
4057a3e0 | 880 | ports = scm_c_make_vector (n, SCM_BOOL_F); |
3a5fb14d | 881 | |
5dbc6c06 HWN |
882 | scm_i_pthread_mutex_lock (&scm_i_port_table_mutex); |
883 | ports = scm_internal_hash_fold (scm_i_collect_keys_in_vector, &i, | |
884 | ports, scm_i_port_weak_hash); | |
9de87eea | 885 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
3a5fb14d | 886 | |
5dbc6c06 HWN |
887 | for (i = 0; i < n; i++) { |
888 | SCM p = SCM_SIMPLE_VECTOR_REF (ports, i); | |
889 | if (SCM_PORTP (p)) | |
890 | proc (data, p); | |
891 | } | |
bd83658e RB |
892 | |
893 | scm_remember_upto_here_1 (ports); | |
c536b4b3 | 894 | } |
fdfe6305 | 895 | |
c536b4b3 MV |
896 | SCM_DEFINE (scm_port_for_each, "port-for-each", 1, 0, 0, |
897 | (SCM proc), | |
898 | "Apply @var{proc} to each port in the Guile port table\n" | |
899 | "in turn. The return value is unspecified. More specifically,\n" | |
900 | "@var{proc} is applied exactly once to every port that exists\n" | |
901 | "in the system at the time @var{port-for-each} is invoked.\n" | |
902 | "Changes to the port table while @var{port-for-each} is running\n" | |
903 | "have no effect as far as @var{port-for-each} is concerned.") | |
904 | #define FUNC_NAME s_scm_port_for_each | |
905 | { | |
906 | SCM_VALIDATE_PROC (1, proc); | |
907 | ||
908 | scm_c_port_for_each ((void (*)(void*,SCM))scm_call_1, proc); | |
c2ca4493 GH |
909 | return SCM_UNSPECIFIED; |
910 | } | |
911 | #undef FUNC_NAME | |
912 | ||
c536b4b3 | 913 | |
d68fee48 JB |
914 | \f |
915 | /* Utter miscellany. Gosh, we should clean this up some time. */ | |
916 | ||
3b3b36dd | 917 | SCM_DEFINE (scm_input_port_p, "input-port?", 1, 0, 0, |
1bbd0b84 | 918 | (SCM x), |
1e6808ea MG |
919 | "Return @code{#t} if @var{x} is an input port, otherwise return\n" |
920 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
921 | "@code{port?}.") | |
1bbd0b84 | 922 | #define FUNC_NAME s_scm_input_port_p |
0f2d19dd | 923 | { |
7888309b | 924 | return scm_from_bool (SCM_INPUT_PORT_P (x)); |
0f2d19dd | 925 | } |
1bbd0b84 | 926 | #undef FUNC_NAME |
0f2d19dd | 927 | |
3b3b36dd | 928 | SCM_DEFINE (scm_output_port_p, "output-port?", 1, 0, 0, |
1bbd0b84 | 929 | (SCM x), |
1e6808ea MG |
930 | "Return @code{#t} if @var{x} is an output port, otherwise return\n" |
931 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
932 | "@code{port?}.") | |
1bbd0b84 | 933 | #define FUNC_NAME s_scm_output_port_p |
0f2d19dd | 934 | { |
82893676 | 935 | x = SCM_COERCE_OUTPORT (x); |
7888309b | 936 | return scm_from_bool (SCM_OUTPUT_PORT_P (x)); |
0f2d19dd | 937 | } |
1bbd0b84 | 938 | #undef FUNC_NAME |
0f2d19dd | 939 | |
eb5c0a2a GH |
940 | SCM_DEFINE (scm_port_p, "port?", 1, 0, 0, |
941 | (SCM x), | |
1e6808ea | 942 | "Return a boolean indicating whether @var{x} is a port.\n" |
5352393c MG |
943 | "Equivalent to @code{(or (input-port? @var{x}) (output-port?\n" |
944 | "@var{x}))}.") | |
eb5c0a2a GH |
945 | #define FUNC_NAME s_scm_port_p |
946 | { | |
7888309b | 947 | return scm_from_bool (SCM_PORTP (x)); |
eb5c0a2a GH |
948 | } |
949 | #undef FUNC_NAME | |
950 | ||
3b3b36dd | 951 | SCM_DEFINE (scm_port_closed_p, "port-closed?", 1, 0, 0, |
1bbd0b84 | 952 | (SCM port), |
1e6808ea MG |
953 | "Return @code{#t} if @var{port} is closed or @code{#f} if it is\n" |
954 | "open.") | |
1bbd0b84 | 955 | #define FUNC_NAME s_scm_port_closed_p |
60d0643d | 956 | { |
34d19ef6 | 957 | SCM_VALIDATE_PORT (1, port); |
7888309b | 958 | return scm_from_bool (!SCM_OPPORTP (port)); |
60d0643d | 959 | } |
1bbd0b84 | 960 | #undef FUNC_NAME |
0f2d19dd | 961 | |
3b3b36dd | 962 | SCM_DEFINE (scm_eof_object_p, "eof-object?", 1, 0, 0, |
1bbd0b84 | 963 | (SCM x), |
1e6808ea MG |
964 | "Return @code{#t} if @var{x} is an end-of-file object; otherwise\n" |
965 | "return @code{#f}.") | |
1bbd0b84 | 966 | #define FUNC_NAME s_scm_eof_object_p |
0f2d19dd | 967 | { |
7888309b | 968 | return scm_from_bool(SCM_EOF_OBJECT_P (x)); |
0f2d19dd | 969 | } |
1bbd0b84 | 970 | #undef FUNC_NAME |
0f2d19dd | 971 | |
3b3b36dd | 972 | SCM_DEFINE (scm_force_output, "force-output", 0, 1, 0, |
1bbd0b84 | 973 | (SCM port), |
b380b885 | 974 | "Flush the specified output port, or the current output port if @var{port}\n" |
9401323e | 975 | "is omitted. The current output buffer contents are passed to the\n" |
b380b885 MD |
976 | "underlying port implementation (e.g., in the case of fports, the\n" |
977 | "data will be written to the file and the output buffer will be cleared.)\n" | |
978 | "It has no effect on an unbuffered port.\n\n" | |
979 | "The return value is unspecified.") | |
1bbd0b84 | 980 | #define FUNC_NAME s_scm_force_output |
0f2d19dd JB |
981 | { |
982 | if (SCM_UNBNDP (port)) | |
9de87eea | 983 | port = scm_current_output_port (); |
0f2d19dd | 984 | else |
78446828 MV |
985 | { |
986 | port = SCM_COERCE_OUTPORT (port); | |
34d19ef6 | 987 | SCM_VALIDATE_OPOUTPORT (1, port); |
78446828 | 988 | } |
affc96b5 | 989 | scm_flush (port); |
ee149d03 | 990 | return SCM_UNSPECIFIED; |
0f2d19dd | 991 | } |
1bbd0b84 | 992 | #undef FUNC_NAME |
0f2d19dd | 993 | |
5dbc6c06 HWN |
994 | |
995 | static void | |
61d3568b | 996 | flush_output_port (void *closure, SCM port) |
5dbc6c06 | 997 | { |
5dbc6c06 HWN |
998 | if (SCM_OPOUTPORTP (port)) |
999 | scm_flush (port); | |
1000 | } | |
1001 | ||
a1ec6916 | 1002 | SCM_DEFINE (scm_flush_all_ports, "flush-all-ports", 0, 0, 0, |
1bbd0b84 | 1003 | (), |
b380b885 MD |
1004 | "Equivalent to calling @code{force-output} on\n" |
1005 | "all open output ports. The return value is unspecified.") | |
1bbd0b84 | 1006 | #define FUNC_NAME s_scm_flush_all_ports |
89ea5b7c | 1007 | { |
5dbc6c06 | 1008 | scm_c_port_for_each (&flush_output_port, NULL); |
89ea5b7c GH |
1009 | return SCM_UNSPECIFIED; |
1010 | } | |
1bbd0b84 | 1011 | #undef FUNC_NAME |
0f2d19dd | 1012 | |
3b3b36dd | 1013 | SCM_DEFINE (scm_read_char, "read-char", 0, 1, 0, |
1bbd0b84 | 1014 | (SCM port), |
1e6808ea MG |
1015 | "Return the next character available from @var{port}, updating\n" |
1016 | "@var{port} to point to the following character. If no more\n" | |
1017 | "characters are available, the end-of-file object is returned.") | |
1bbd0b84 | 1018 | #define FUNC_NAME s_scm_read_char |
0f2d19dd | 1019 | { |
889975e5 | 1020 | scm_t_wchar c; |
0f2d19dd | 1021 | if (SCM_UNBNDP (port)) |
9de87eea | 1022 | port = scm_current_input_port (); |
34d19ef6 | 1023 | SCM_VALIDATE_OPINPORT (1, port); |
b7f3516f | 1024 | c = scm_getc (port); |
0f2d19dd JB |
1025 | if (EOF == c) |
1026 | return SCM_EOF_VAL; | |
7866a09b | 1027 | return SCM_MAKE_CHAR (c); |
0f2d19dd | 1028 | } |
1bbd0b84 | 1029 | #undef FUNC_NAME |
0f2d19dd | 1030 | |
889975e5 MG |
1031 | #define SCM_MBCHAR_BUF_SIZE (4) |
1032 | ||
fd5eec2b LC |
1033 | /* Read a codepoint from PORT and return it. Fill BUF with the byte |
1034 | representation of the codepoint in PORT's encoding, and set *LEN to | |
1035 | the length in bytes of that representation. Raise an error on | |
1036 | failure. */ | |
1037 | static scm_t_wchar | |
1038 | get_codepoint (SCM port, char buf[SCM_MBCHAR_BUF_SIZE], size_t *len) | |
889975e5 MG |
1039 | { |
1040 | int c; | |
fd5eec2b | 1041 | size_t bufcount = 0; |
63479112 | 1042 | scm_t_uint32 result_buf; |
889975e5 MG |
1043 | scm_t_wchar codepoint = 0; |
1044 | scm_t_uint32 *u32; | |
1045 | size_t u32len; | |
1046 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
1047 | ||
1048 | c = scm_get_byte_or_eof (port); | |
1049 | if (c == EOF) | |
1050 | return (scm_t_wchar) EOF; | |
1051 | ||
1052 | buf[0] = c; | |
1053 | bufcount++; | |
1054 | ||
1055 | if (pt->encoding == NULL) | |
63479112 | 1056 | { |
889975e5 | 1057 | /* The encoding is Latin-1: bytes are characters. */ |
8736ef70 | 1058 | codepoint = (unsigned char) buf[0]; |
889975e5 MG |
1059 | goto success; |
1060 | } | |
1061 | ||
1062 | for (;;) | |
1063 | { | |
63479112 LC |
1064 | u32len = sizeof (result_buf) / sizeof (scm_t_uint32); |
1065 | u32 = u32_conv_from_encoding (pt->encoding, | |
1066 | (enum iconv_ilseq_handler) pt->ilseq_handler, | |
1067 | buf, bufcount, NULL, &result_buf, &u32len); | |
889975e5 MG |
1068 | if (u32 == NULL || u32len == 0) |
1069 | { | |
1070 | if (errno == ENOMEM) | |
1071 | scm_memory_error ("Input decoding"); | |
63479112 | 1072 | |
889975e5 MG |
1073 | /* Otherwise errno is EILSEQ or EINVAL, so perhaps more |
1074 | bytes are needed. Keep looping. */ | |
1075 | } | |
63479112 | 1076 | else |
889975e5 MG |
1077 | { |
1078 | /* Complete codepoint found. */ | |
1079 | codepoint = u32[0]; | |
63479112 LC |
1080 | |
1081 | if (SCM_UNLIKELY (u32 != &result_buf)) | |
1082 | /* libunistring up to 0.9.3 (included) would always heap-allocate | |
1083 | the result even when a large-enough RESULT_BUF is supplied, see | |
1084 | <http://lists.gnu.org/archive/html/bug-libunistring/2010-07/msg00003.html>. */ | |
1085 | free (u32); | |
1086 | ||
889975e5 MG |
1087 | goto success; |
1088 | } | |
1089 | ||
1090 | if (bufcount == SCM_MBCHAR_BUF_SIZE) | |
1091 | { | |
1092 | /* We've read several bytes and didn't find a good | |
1093 | codepoint. Give up. */ | |
1094 | goto failure; | |
1095 | } | |
1096 | ||
1097 | c = scm_get_byte_or_eof (port); | |
1098 | ||
1099 | if (c == EOF) | |
1100 | { | |
1101 | /* EOF before a complete character was read. Push it all | |
1102 | back and return EOF. */ | |
1103 | while (bufcount > 0) | |
1104 | { | |
1105 | /* FIXME: this will probably cause errors in the port column. */ | |
1106 | scm_unget_byte (buf[bufcount-1], port); | |
1107 | bufcount --; | |
1108 | } | |
1109 | return EOF; | |
1110 | } | |
1111 | ||
1112 | if (c == '\n') | |
1113 | { | |
1114 | /* It is always invalid to have EOL in the middle of a | |
1115 | multibyte character. */ | |
1116 | scm_unget_byte ('\n', port); | |
1117 | goto failure; | |
1118 | } | |
1119 | ||
1120 | buf[bufcount++] = c; | |
1121 | } | |
1122 | ||
1123 | success: | |
1124 | switch (codepoint) | |
1125 | { | |
1126 | case '\a': | |
1127 | break; | |
1128 | case '\b': | |
1129 | SCM_DECCOL (port); | |
1130 | break; | |
1131 | case '\n': | |
1132 | SCM_INCLINE (port); | |
1133 | break; | |
1134 | case '\r': | |
1135 | SCM_ZEROCOL (port); | |
1136 | break; | |
1137 | case '\t': | |
1138 | SCM_TABCOL (port); | |
1139 | break; | |
1140 | default: | |
1141 | SCM_INCCOL (port); | |
1142 | break; | |
1143 | } | |
1144 | ||
fd5eec2b LC |
1145 | *len = bufcount; |
1146 | ||
889975e5 MG |
1147 | return codepoint; |
1148 | ||
1149 | failure: | |
1150 | { | |
1151 | char *err_buf; | |
1152 | SCM err_str = scm_i_make_string (bufcount, &err_buf); | |
1153 | memcpy (err_buf, buf, bufcount); | |
1154 | ||
1155 | if (errno == EILSEQ) | |
1156 | scm_misc_error (NULL, "input encoding error for ~s: ~s", | |
1157 | scm_list_2 (scm_from_locale_string (scm_i_get_port_encoding (port)), | |
1158 | err_str)); | |
1159 | else | |
1160 | scm_misc_error (NULL, "input encoding error (invalid) for ~s: ~s\n", | |
1161 | scm_list_2 (scm_from_locale_string (scm_i_get_port_encoding (port)), | |
1162 | err_str)); | |
1163 | } | |
1164 | ||
1165 | /* Never gets here. */ | |
1166 | return 0; | |
1167 | } | |
1168 | ||
fd5eec2b LC |
1169 | /* Read a codepoint from PORT and return it. */ |
1170 | scm_t_wchar | |
1171 | scm_getc (SCM port) | |
1172 | { | |
1173 | size_t len; | |
1174 | char buf[SCM_MBCHAR_BUF_SIZE]; | |
1175 | ||
1176 | return get_codepoint (port, buf, &len); | |
1177 | } | |
889975e5 | 1178 | |
5c070ca7 | 1179 | /* this should only be called when the read buffer is empty. it |
affc96b5 | 1180 | tries to refill the read buffer. it returns the first char from |
5c070ca7 | 1181 | the port, which is either EOF or *(pt->read_pos). */ |
6c951427 | 1182 | int |
affc96b5 | 1183 | scm_fill_input (SCM port) |
6c951427 | 1184 | { |
92c2555f | 1185 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e | 1186 | |
b5cb4464 NJ |
1187 | assert (pt->read_pos == pt->read_end); |
1188 | ||
6c951427 GH |
1189 | if (pt->read_buf == pt->putback_buf) |
1190 | { | |
1191 | /* finished reading put-back chars. */ | |
1192 | pt->read_buf = pt->saved_read_buf; | |
1193 | pt->read_pos = pt->saved_read_pos; | |
1194 | pt->read_end = pt->saved_read_end; | |
1195 | pt->read_buf_size = pt->saved_read_buf_size; | |
1196 | if (pt->read_pos < pt->read_end) | |
5c070ca7 | 1197 | return *(pt->read_pos); |
6c951427 | 1198 | } |
affc96b5 | 1199 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
6c951427 GH |
1200 | } |
1201 | ||
3cb988bd | 1202 | |
6fe692e9 MD |
1203 | /* scm_lfwrite |
1204 | * | |
53802ea8 MV |
1205 | * This function differs from scm_c_write; it updates port line and |
1206 | * column. */ | |
6fe692e9 | 1207 | |
9c44cd45 MG |
1208 | static void |
1209 | update_port_lf (scm_t_wchar c, SCM port) | |
1210 | { | |
1211 | if (c == '\a') | |
b0799290 | 1212 | ; /* Do nothing. */ |
9c44cd45 | 1213 | else if (c == '\b') |
b0799290 | 1214 | SCM_DECCOL (port); |
9c44cd45 | 1215 | else if (c == '\n') |
b0799290 | 1216 | SCM_INCLINE (port); |
9c44cd45 | 1217 | else if (c == '\r') |
b0799290 | 1218 | SCM_ZEROCOL (port); |
9c44cd45 | 1219 | else if (c == '\t') |
b0799290 | 1220 | SCM_TABCOL (port); |
9c44cd45 | 1221 | else |
b0799290 | 1222 | SCM_INCCOL (port); |
9c44cd45 MG |
1223 | } |
1224 | ||
1225 | void | |
1be6b49c | 1226 | scm_lfwrite (const char *ptr, size_t size, SCM port) |
ee149d03 | 1227 | { |
92c2555f MV |
1228 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1229 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
3e2043c4 | 1230 | |
840ae05d | 1231 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1232 | scm_end_input (port); |
283a1a0e | 1233 | |
31703ab8 | 1234 | ptob->write (port, ptr, size); |
840ae05d | 1235 | |
9c44cd45 MG |
1236 | for (; size; ptr++, size--) |
1237 | update_port_lf ((scm_t_wchar) (unsigned char) *ptr, port); | |
1238 | ||
1239 | if (pt->rw_random) | |
1240 | pt->rw_active = SCM_PORT_WRITE; | |
1241 | } | |
1242 | ||
1243 | /* Write a scheme string STR to PORT from START inclusive to END | |
1244 | exclusive. */ | |
1245 | void | |
1246 | scm_lfwrite_substr (SCM str, size_t start, size_t end, SCM port) | |
1247 | { | |
1248 | size_t i, size = scm_i_string_length (str); | |
1249 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
1250 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
1251 | scm_t_wchar p; | |
1252 | char *buf; | |
1253 | size_t len; | |
1254 | ||
1255 | if (pt->rw_active == SCM_PORT_READ) | |
1256 | scm_end_input (port); | |
1257 | ||
bd4911ef | 1258 | if (end == (size_t) (-1)) |
9c44cd45 MG |
1259 | end = size; |
1260 | size = end - start; | |
1261 | ||
06b96190 MG |
1262 | /* Note that making a substring will likely take the |
1263 | stringbuf_write_mutex. So, one shouldn't use scm_lfwrite_substr | |
1264 | if the stringbuf write mutex may still be held elsewhere. */ | |
9c44cd45 | 1265 | buf = scm_to_stringn (scm_c_substring (str, start, end), &len, |
889975e5 | 1266 | pt->encoding, pt->ilseq_handler); |
9c44cd45 MG |
1267 | ptob->write (port, buf, len); |
1268 | free (buf); | |
1269 | ||
1270 | for (i = 0; i < size; i++) | |
1271 | { | |
1272 | p = scm_i_string_ref (str, i + start); | |
1273 | update_port_lf (p, port); | |
53802ea8 | 1274 | } |
53802ea8 | 1275 | |
840ae05d JB |
1276 | if (pt->rw_random) |
1277 | pt->rw_active = SCM_PORT_WRITE; | |
ee149d03 | 1278 | } |
3cb988bd | 1279 | |
9c44cd45 MG |
1280 | /* Write a scheme string STR to PORT. */ |
1281 | void | |
1282 | scm_lfwrite_str (SCM str, SCM port) | |
1283 | { | |
06b96190 MG |
1284 | size_t i, size = scm_i_string_length (str); |
1285 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
1286 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
1287 | scm_t_wchar p; | |
1288 | char *buf; | |
1289 | size_t len; | |
1290 | ||
1291 | if (pt->rw_active == SCM_PORT_READ) | |
1292 | scm_end_input (port); | |
1293 | ||
1294 | buf = scm_to_stringn (str, &len, | |
889975e5 | 1295 | pt->encoding, pt->ilseq_handler); |
06b96190 MG |
1296 | ptob->write (port, buf, len); |
1297 | free (buf); | |
1298 | ||
1299 | for (i = 0; i < size; i++) | |
1300 | { | |
1301 | p = scm_i_string_ref (str, i); | |
1302 | update_port_lf (p, port); | |
1303 | } | |
1304 | ||
1305 | if (pt->rw_random) | |
1306 | pt->rw_active = SCM_PORT_WRITE; | |
9c44cd45 MG |
1307 | } |
1308 | ||
6fe692e9 MD |
1309 | /* scm_c_read |
1310 | * | |
1311 | * Used by an application to read arbitrary number of bytes from an | |
1312 | * SCM port. Same semantics as libc read, except that scm_c_read only | |
1313 | * returns less than SIZE bytes if at end-of-file. | |
1314 | * | |
1315 | * Warning: Doesn't update port line and column counts! */ | |
1316 | ||
b5cb4464 NJ |
1317 | /* This structure, and the following swap_buffer function, are used |
1318 | for temporarily swapping a port's own read buffer, and the buffer | |
1319 | that the caller of scm_c_read provides. */ | |
1320 | struct port_and_swap_buffer | |
1321 | { | |
1322 | scm_t_port *pt; | |
1323 | unsigned char *buffer; | |
1324 | size_t size; | |
1325 | }; | |
1326 | ||
1327 | static void | |
1328 | swap_buffer (void *data) | |
1329 | { | |
1330 | struct port_and_swap_buffer *psb = (struct port_and_swap_buffer *) data; | |
1331 | unsigned char *old_buf = psb->pt->read_buf; | |
1332 | size_t old_size = psb->pt->read_buf_size; | |
1333 | ||
1334 | /* Make the port use (buffer, size) from the struct. */ | |
1335 | psb->pt->read_pos = psb->pt->read_buf = psb->pt->read_end = psb->buffer; | |
1336 | psb->pt->read_buf_size = psb->size; | |
1337 | ||
1338 | /* Save the port's old (buffer, size) in the struct. */ | |
1339 | psb->buffer = old_buf; | |
1340 | psb->size = old_size; | |
1341 | } | |
1342 | ||
1be6b49c ML |
1343 | size_t |
1344 | scm_c_read (SCM port, void *buffer, size_t size) | |
693758d5 | 1345 | #define FUNC_NAME "scm_c_read" |
6fe692e9 | 1346 | { |
693758d5 | 1347 | scm_t_port *pt; |
1be6b49c | 1348 | size_t n_read = 0, n_available; |
b5cb4464 | 1349 | struct port_and_swap_buffer psb; |
6fe692e9 | 1350 | |
693758d5 LC |
1351 | SCM_VALIDATE_OPINPORT (1, port); |
1352 | ||
1353 | pt = SCM_PTAB_ENTRY (port); | |
6fe692e9 MD |
1354 | if (pt->rw_active == SCM_PORT_WRITE) |
1355 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
1356 | ||
1357 | if (pt->rw_random) | |
1358 | pt->rw_active = SCM_PORT_READ; | |
1359 | ||
b5cb4464 NJ |
1360 | /* Take bytes first from the port's read buffer. */ |
1361 | if (pt->read_pos < pt->read_end) | |
6fe692e9 | 1362 | { |
b5cb4464 | 1363 | n_available = min (size, pt->read_end - pt->read_pos); |
6fe692e9 | 1364 | memcpy (buffer, pt->read_pos, n_available); |
910d1e40 | 1365 | buffer = (char *) buffer + n_available; |
6fe692e9 MD |
1366 | pt->read_pos += n_available; |
1367 | n_read += n_available; | |
6fe692e9 | 1368 | size -= n_available; |
6fe692e9 MD |
1369 | } |
1370 | ||
b5cb4464 NJ |
1371 | /* Avoid the scm_dynwind_* costs if we now have enough data. */ |
1372 | if (size == 0) | |
1373 | return n_read; | |
1374 | ||
1375 | /* Now we will call scm_fill_input repeatedly until we have read the | |
1376 | requested number of bytes. (Note that a single scm_fill_input | |
1377 | call does not guarantee to fill the whole of the port's read | |
6d227556 | 1378 | buffer.) */ |
75192345 | 1379 | if (pt->read_buf_size <= 1 && pt->encoding == NULL) |
b5cb4464 | 1380 | { |
6d227556 NJ |
1381 | /* The port that we are reading from is unbuffered - i.e. does |
1382 | not have its own persistent buffer - but we have a buffer, | |
1383 | provided by our caller, that is the right size for the data | |
1384 | that is wanted. For the following scm_fill_input calls, | |
1385 | therefore, we use the buffer in hand as the port's read | |
1386 | buffer. | |
1387 | ||
1388 | We need to make sure that the port's normal (1 byte) buffer | |
1389 | is reinstated in case one of the scm_fill_input () calls | |
1390 | throws an exception; we use the scm_dynwind_* API to achieve | |
75192345 MG |
1391 | that. |
1392 | ||
1393 | A consequence of this optimization is that the fill_input | |
1394 | functions can't unget characters. That'll push data to the | |
1395 | pushback buffer instead of this psb buffer. */ | |
1396 | #if SCM_DEBUG == 1 | |
1397 | unsigned char *pback = pt->putback_buf; | |
1398 | #endif | |
6d227556 NJ |
1399 | psb.pt = pt; |
1400 | psb.buffer = buffer; | |
1401 | psb.size = size; | |
1402 | scm_dynwind_begin (SCM_F_DYNWIND_REWINDABLE); | |
1403 | scm_dynwind_rewind_handler (swap_buffer, &psb, SCM_F_WIND_EXPLICITLY); | |
1404 | scm_dynwind_unwind_handler (swap_buffer, &psb, SCM_F_WIND_EXPLICITLY); | |
1405 | ||
1406 | /* Call scm_fill_input until we have all the bytes that we need, | |
1407 | or we hit EOF. */ | |
1408 | while (pt->read_buf_size && (scm_fill_input (port) != EOF)) | |
1409 | { | |
1410 | pt->read_buf_size -= (pt->read_end - pt->read_pos); | |
1411 | pt->read_pos = pt->read_buf = pt->read_end; | |
1412 | } | |
75192345 MG |
1413 | #if SCM_DEBUG == 1 |
1414 | if (pback != pt->putback_buf | |
1415 | || pt->read_buf - (unsigned char *) buffer < 0) | |
1416 | scm_misc_error (FUNC_NAME, | |
1417 | "scm_c_read must not call a fill function that pushes " | |
1418 | "back characters onto an unbuffered port", SCM_EOL); | |
1419 | #endif | |
6d227556 | 1420 | n_read += pt->read_buf - (unsigned char *) buffer; |
75192345 | 1421 | |
6d227556 NJ |
1422 | /* Reinstate the port's normal buffer. */ |
1423 | scm_dynwind_end (); | |
1424 | } | |
1425 | else | |
1426 | { | |
1427 | /* The port has its own buffer. It is important that we use it, | |
1428 | even if it happens to be smaller than our caller's buffer, so | |
1429 | that a custom port implementation's entry points (in | |
1430 | particular, fill_input) can rely on the buffer always being | |
1431 | the same as they first set up. */ | |
1432 | while (size && (scm_fill_input (port) != EOF)) | |
1433 | { | |
1434 | n_available = min (size, pt->read_end - pt->read_pos); | |
1435 | memcpy (buffer, pt->read_pos, n_available); | |
1436 | buffer = (char *) buffer + n_available; | |
1437 | pt->read_pos += n_available; | |
1438 | n_read += n_available; | |
1439 | size -= n_available; | |
1440 | } | |
1441 | } | |
6fe692e9 | 1442 | |
b5cb4464 | 1443 | return n_read; |
6fe692e9 | 1444 | } |
693758d5 | 1445 | #undef FUNC_NAME |
6fe692e9 MD |
1446 | |
1447 | /* scm_c_write | |
1448 | * | |
1449 | * Used by an application to write arbitrary number of bytes to an SCM | |
1450 | * port. Similar semantics as libc write. However, unlike libc | |
1451 | * write, scm_c_write writes the requested number of bytes and has no | |
1452 | * return value. | |
1453 | * | |
1454 | * Warning: Doesn't update port line and column counts! | |
1455 | */ | |
1456 | ||
693758d5 | 1457 | void |
1be6b49c | 1458 | scm_c_write (SCM port, const void *ptr, size_t size) |
693758d5 | 1459 | #define FUNC_NAME "scm_c_write" |
6fe692e9 | 1460 | { |
693758d5 LC |
1461 | scm_t_port *pt; |
1462 | scm_t_ptob_descriptor *ptob; | |
1463 | ||
1464 | SCM_VALIDATE_OPOUTPORT (1, port); | |
1465 | ||
1466 | pt = SCM_PTAB_ENTRY (port); | |
1467 | ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
6fe692e9 MD |
1468 | |
1469 | if (pt->rw_active == SCM_PORT_READ) | |
1470 | scm_end_input (port); | |
1471 | ||
1472 | ptob->write (port, ptr, size); | |
1473 | ||
1474 | if (pt->rw_random) | |
1475 | pt->rw_active = SCM_PORT_WRITE; | |
1476 | } | |
693758d5 | 1477 | #undef FUNC_NAME |
3cb988bd | 1478 | |
fca43887 | 1479 | void |
a284e297 | 1480 | scm_flush (SCM port) |
ee149d03 | 1481 | { |
c014a02e | 1482 | long i = SCM_PTOBNUM (port); |
7f2a6c38 | 1483 | assert (i >= 0); |
affc96b5 | 1484 | (scm_ptobs[i].flush) (port); |
ee149d03 JB |
1485 | } |
1486 | ||
283a1a0e | 1487 | void |
a284e297 | 1488 | scm_end_input (SCM port) |
283a1a0e | 1489 | { |
c014a02e | 1490 | long offset; |
92c2555f | 1491 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e GH |
1492 | |
1493 | if (pt->read_buf == pt->putback_buf) | |
1494 | { | |
1495 | offset = pt->read_end - pt->read_pos; | |
1496 | pt->read_buf = pt->saved_read_buf; | |
1497 | pt->read_pos = pt->saved_read_pos; | |
1498 | pt->read_end = pt->saved_read_end; | |
1499 | pt->read_buf_size = pt->saved_read_buf_size; | |
1500 | } | |
1501 | else | |
1502 | offset = 0; | |
1503 | ||
affc96b5 | 1504 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
283a1a0e GH |
1505 | } |
1506 | ||
ee149d03 JB |
1507 | \f |
1508 | ||
1509 | ||
1510 | void | |
889975e5 MG |
1511 | scm_unget_byte (int c, SCM port) |
1512 | #define FUNC_NAME "scm_unget_byte" | |
ee149d03 | 1513 | { |
92c2555f | 1514 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
840ae05d | 1515 | |
6c951427 GH |
1516 | if (pt->read_buf == pt->putback_buf) |
1517 | /* already using the put-back buffer. */ | |
1518 | { | |
1519 | /* enlarge putback_buf if necessary. */ | |
1520 | if (pt->read_end == pt->read_buf + pt->read_buf_size | |
1521 | && pt->read_buf == pt->read_pos) | |
1522 | { | |
1be6b49c | 1523 | size_t new_size = pt->read_buf_size * 2; |
c6c79933 | 1524 | unsigned char *tmp = (unsigned char *) |
4c9419ac MV |
1525 | scm_gc_realloc (pt->putback_buf, pt->read_buf_size, new_size, |
1526 | "putback buffer"); | |
6c951427 | 1527 | |
6c951427 GH |
1528 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; |
1529 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
1530 | pt->read_buf_size = pt->putback_buf_size = new_size; | |
1531 | } | |
1532 | ||
1533 | /* shift any existing bytes to buffer + 1. */ | |
1534 | if (pt->read_pos == pt->read_end) | |
1535 | pt->read_end = pt->read_buf + 1; | |
1536 | else if (pt->read_pos != pt->read_buf + 1) | |
1537 | { | |
1538 | int count = pt->read_end - pt->read_pos; | |
1539 | ||
1540 | memmove (pt->read_buf + 1, pt->read_pos, count); | |
1541 | pt->read_end = pt->read_buf + 1 + count; | |
1542 | } | |
1543 | ||
1544 | pt->read_pos = pt->read_buf; | |
1545 | } | |
1546 | else | |
1547 | /* switch to the put-back buffer. */ | |
1548 | { | |
1549 | if (pt->putback_buf == NULL) | |
1550 | { | |
c357d546 | 1551 | pt->putback_buf |
92d8fd32 LC |
1552 | = (unsigned char *) scm_gc_malloc_pointerless |
1553 | (SCM_INITIAL_PUTBACK_BUF_SIZE, "putback buffer"); | |
6c951427 GH |
1554 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; |
1555 | } | |
1556 | ||
1557 | pt->saved_read_buf = pt->read_buf; | |
1558 | pt->saved_read_pos = pt->read_pos; | |
1559 | pt->saved_read_end = pt->read_end; | |
1560 | pt->saved_read_buf_size = pt->read_buf_size; | |
1561 | ||
1562 | pt->read_pos = pt->read_buf = pt->putback_buf; | |
1563 | pt->read_end = pt->read_buf + 1; | |
1564 | pt->read_buf_size = pt->putback_buf_size; | |
1565 | } | |
1566 | ||
1567 | *pt->read_buf = c; | |
ee149d03 | 1568 | |
840ae05d JB |
1569 | if (pt->rw_random) |
1570 | pt->rw_active = SCM_PORT_READ; | |
889975e5 MG |
1571 | } |
1572 | #undef FUNC_NAME | |
1573 | ||
63479112 | 1574 | void |
889975e5 MG |
1575 | scm_ungetc (scm_t_wchar c, SCM port) |
1576 | #define FUNC_NAME "scm_ungetc" | |
1577 | { | |
1578 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
63479112 LC |
1579 | char *result; |
1580 | char result_buf[10]; | |
1581 | const char *encoding; | |
889975e5 MG |
1582 | size_t len; |
1583 | int i; | |
1584 | ||
63479112 LC |
1585 | if (pt->encoding != NULL) |
1586 | encoding = pt->encoding; | |
1587 | else | |
1588 | encoding = "ISO-8859-1"; | |
1589 | ||
1590 | len = sizeof (result_buf); | |
1591 | result = u32_conv_to_encoding (encoding, | |
1592 | (enum iconv_ilseq_handler) pt->ilseq_handler, | |
1593 | (uint32_t *) &c, 1, NULL, | |
1594 | result_buf, &len); | |
1595 | ||
1596 | if (SCM_UNLIKELY (result == NULL || len == 0)) | |
1597 | { | |
1598 | SCM chr; | |
1599 | ||
1600 | chr = scm_integer_to_char (scm_from_uint32 (c)); | |
1601 | scm_encoding_error (FUNC_NAME, errno, | |
1602 | "conversion to port encoding failed", | |
1603 | "UTF-32", encoding, | |
1604 | scm_string (scm_list_1 (chr))); | |
1605 | } | |
1606 | ||
889975e5 | 1607 | for (i = len - 1; i >= 0; i--) |
63479112 LC |
1608 | scm_unget_byte (result[i], port); |
1609 | ||
1610 | if (SCM_UNLIKELY (result != result_buf)) | |
1611 | free (result); | |
840ae05d | 1612 | |
ee149d03 JB |
1613 | if (c == '\n') |
1614 | { | |
1615 | /* What should col be in this case? | |
1616 | * We'll leave it at -1. | |
1617 | */ | |
1618 | SCM_LINUM (port) -= 1; | |
1619 | } | |
1620 | else | |
1621 | SCM_COL(port) -= 1; | |
1622 | } | |
c6c79933 | 1623 | #undef FUNC_NAME |
ee149d03 JB |
1624 | |
1625 | ||
1626 | void | |
70d63753 | 1627 | scm_ungets (const char *s, int n, SCM port) |
ee149d03 JB |
1628 | { |
1629 | /* This is simple minded and inefficient, but unreading strings is | |
1630 | * probably not a common operation, and remember that line and | |
1631 | * column numbers have to be handled... | |
1632 | * | |
1633 | * Please feel free to write an optimized version! | |
1634 | */ | |
1635 | while (n--) | |
1636 | scm_ungetc (s[n], port); | |
1637 | } | |
1638 | ||
1639 | ||
3b3b36dd | 1640 | SCM_DEFINE (scm_peek_char, "peek-char", 0, 1, 0, |
1bbd0b84 | 1641 | (SCM port), |
1e6808ea MG |
1642 | "Return the next character available from @var{port},\n" |
1643 | "@emph{without} updating @var{port} to point to the following\n" | |
1644 | "character. If no more characters are available, the\n" | |
c2dfff19 KR |
1645 | "end-of-file object is returned.\n" |
1646 | "\n" | |
1647 | "The value returned by\n" | |
1e6808ea MG |
1648 | "a call to @code{peek-char} is the same as the value that would\n" |
1649 | "have been returned by a call to @code{read-char} on the same\n" | |
1650 | "port. The only difference is that the very next call to\n" | |
1651 | "@code{read-char} or @code{peek-char} on that @var{port} will\n" | |
1652 | "return the value returned by the preceding call to\n" | |
1653 | "@code{peek-char}. In particular, a call to @code{peek-char} on\n" | |
1654 | "an interactive port will hang waiting for input whenever a call\n" | |
c2dfff19 | 1655 | "to @code{read-char} would have hung.") |
1bbd0b84 | 1656 | #define FUNC_NAME s_scm_peek_char |
ee149d03 | 1657 | { |
fd5eec2b LC |
1658 | SCM result; |
1659 | scm_t_wchar c; | |
1660 | char bytes[SCM_MBCHAR_BUF_SIZE]; | |
1661 | long column, line; | |
1662 | size_t len; | |
1663 | ||
ee149d03 | 1664 | if (SCM_UNBNDP (port)) |
9de87eea | 1665 | port = scm_current_input_port (); |
b2456dd4 | 1666 | SCM_VALIDATE_OPINPORT (1, port); |
fd5eec2b LC |
1667 | |
1668 | column = SCM_COL (port); | |
1669 | line = SCM_LINUM (port); | |
1670 | ||
1671 | c = get_codepoint (port, bytes, &len); | |
1672 | if (c == EOF) | |
1673 | result = SCM_EOF_VAL; | |
1674 | else | |
1675 | { | |
1676 | long i; | |
1677 | ||
1678 | result = SCM_MAKE_CHAR (c); | |
1679 | ||
1680 | for (i = len - 1; i >= 0; i--) | |
1681 | scm_unget_byte (bytes[i], port); | |
1682 | ||
1683 | SCM_COL (port) = column; | |
1684 | SCM_LINUM (port) = line; | |
1685 | } | |
1686 | ||
1687 | return result; | |
3cb988bd | 1688 | } |
1bbd0b84 | 1689 | #undef FUNC_NAME |
3cb988bd | 1690 | |
1be4270a | 1691 | SCM_DEFINE (scm_unread_char, "unread-char", 1, 1, 0, |
1bbd0b84 | 1692 | (SCM cobj, SCM port), |
b380b885 MD |
1693 | "Place @var{char} in @var{port} so that it will be read by the\n" |
1694 | "next read operation. If called multiple times, the unread characters\n" | |
1695 | "will be read again in last-in first-out order. If @var{port} is\n" | |
1696 | "not supplied, the current input port is used.") | |
1bbd0b84 | 1697 | #define FUNC_NAME s_scm_unread_char |
0f2d19dd JB |
1698 | { |
1699 | int c; | |
1700 | ||
34d19ef6 | 1701 | SCM_VALIDATE_CHAR (1, cobj); |
0f2d19dd | 1702 | if (SCM_UNBNDP (port)) |
9de87eea | 1703 | port = scm_current_input_port (); |
b2456dd4 | 1704 | SCM_VALIDATE_OPINPORT (2, port); |
0f2d19dd | 1705 | |
7866a09b | 1706 | c = SCM_CHAR (cobj); |
0f2d19dd | 1707 | |
b7f3516f | 1708 | scm_ungetc (c, port); |
0f2d19dd JB |
1709 | return cobj; |
1710 | } | |
1bbd0b84 | 1711 | #undef FUNC_NAME |
0f2d19dd | 1712 | |
a1ec6916 | 1713 | SCM_DEFINE (scm_unread_string, "unread-string", 2, 0, 0, |
1bbd0b84 | 1714 | (SCM str, SCM port), |
b380b885 MD |
1715 | "Place the string @var{str} in @var{port} so that its characters will be\n" |
1716 | "read in subsequent read operations. If called multiple times, the\n" | |
1717 | "unread characters will be read again in last-in first-out order. If\n" | |
1718 | "@var{port} is not supplied, the current-input-port is used.") | |
1bbd0b84 | 1719 | #define FUNC_NAME s_scm_unread_string |
ee1e7e13 | 1720 | { |
889975e5 | 1721 | int n; |
34d19ef6 | 1722 | SCM_VALIDATE_STRING (1, str); |
ee1e7e13 | 1723 | if (SCM_UNBNDP (port)) |
9de87eea | 1724 | port = scm_current_input_port (); |
b2456dd4 | 1725 | SCM_VALIDATE_OPINPORT (2, port); |
ee1e7e13 | 1726 | |
889975e5 MG |
1727 | n = scm_i_string_length (str); |
1728 | ||
1729 | while (n--) | |
1730 | scm_ungetc (scm_i_string_ref (str, n), port); | |
ee1e7e13 MD |
1731 | |
1732 | return str; | |
1733 | } | |
1bbd0b84 | 1734 | #undef FUNC_NAME |
ee1e7e13 | 1735 | |
a1ec6916 | 1736 | SCM_DEFINE (scm_seek, "seek", 3, 0, 0, |
1e6808ea MG |
1737 | (SCM fd_port, SCM offset, SCM whence), |
1738 | "Sets the current position of @var{fd/port} to the integer\n" | |
1739 | "@var{offset}, which is interpreted according to the value of\n" | |
1740 | "@var{whence}.\n" | |
1741 | "\n" | |
1742 | "One of the following variables should be supplied for\n" | |
1743 | "@var{whence}:\n" | |
b380b885 MD |
1744 | "@defvar SEEK_SET\n" |
1745 | "Seek from the beginning of the file.\n" | |
1746 | "@end defvar\n" | |
1747 | "@defvar SEEK_CUR\n" | |
1748 | "Seek from the current position.\n" | |
1749 | "@end defvar\n" | |
1750 | "@defvar SEEK_END\n" | |
1751 | "Seek from the end of the file.\n" | |
1e6808ea MG |
1752 | "@end defvar\n" |
1753 | "If @var{fd/port} is a file descriptor, the underlying system\n" | |
1754 | "call is @code{lseek}. @var{port} may be a string port.\n" | |
1755 | "\n" | |
1756 | "The value returned is the new position in the file. This means\n" | |
1757 | "that the current position of a port can be obtained using:\n" | |
1758 | "@lisp\n" | |
b380b885 | 1759 | "(seek port 0 SEEK_CUR)\n" |
1e6808ea | 1760 | "@end lisp") |
1bbd0b84 | 1761 | #define FUNC_NAME s_scm_seek |
840ae05d | 1762 | { |
840ae05d JB |
1763 | int how; |
1764 | ||
1e6808ea | 1765 | fd_port = SCM_COERCE_OUTPORT (fd_port); |
840ae05d | 1766 | |
a55c2b68 | 1767 | how = scm_to_int (whence); |
840ae05d | 1768 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) |
1bbd0b84 | 1769 | SCM_OUT_OF_RANGE (3, whence); |
23f2b9a3 | 1770 | |
0a94eb00 | 1771 | if (SCM_OPPORTP (fd_port)) |
840ae05d | 1772 | { |
92c2555f | 1773 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (fd_port); |
f1ce9199 LC |
1774 | off_t_or_off64_t off = scm_to_off_t_or_off64_t (offset); |
1775 | off_t_or_off64_t rv; | |
840ae05d JB |
1776 | |
1777 | if (!ptob->seek) | |
1bbd0b84 | 1778 | SCM_MISC_ERROR ("port is not seekable", |
1e6808ea | 1779 | scm_cons (fd_port, SCM_EOL)); |
840ae05d | 1780 | else |
1e6808ea | 1781 | rv = ptob->seek (fd_port, off, how); |
f1ce9199 | 1782 | return scm_from_off_t_or_off64_t (rv); |
840ae05d JB |
1783 | } |
1784 | else /* file descriptor?. */ | |
1785 | { | |
23f2b9a3 KR |
1786 | off_t_or_off64_t off = scm_to_off_t_or_off64_t (offset); |
1787 | off_t_or_off64_t rv; | |
1788 | rv = lseek_or_lseek64 (scm_to_int (fd_port), off, how); | |
840ae05d | 1789 | if (rv == -1) |
1bbd0b84 | 1790 | SCM_SYSERROR; |
23f2b9a3 | 1791 | return scm_from_off_t_or_off64_t (rv); |
840ae05d | 1792 | } |
840ae05d | 1793 | } |
1bbd0b84 | 1794 | #undef FUNC_NAME |
840ae05d | 1795 | |
8ab3d8a0 KR |
1796 | #ifndef O_BINARY |
1797 | #define O_BINARY 0 | |
1798 | #endif | |
1799 | ||
1800 | /* Mingw has ftruncate(), perhaps implemented above using chsize, but | |
1801 | doesn't have the filename version truncate(), hence this code. */ | |
1802 | #if HAVE_FTRUNCATE && ! HAVE_TRUNCATE | |
1803 | static int | |
1804 | truncate (const char *file, off_t length) | |
82893676 | 1805 | { |
8ab3d8a0 KR |
1806 | int ret, fdes; |
1807 | ||
1808 | fdes = open (file, O_BINARY | O_WRONLY); | |
1809 | if (fdes == -1) | |
1810 | return -1; | |
1811 | ||
1812 | ret = ftruncate (fdes, length); | |
1813 | if (ret == -1) | |
82893676 | 1814 | { |
8ab3d8a0 | 1815 | int save_errno = errno; |
82893676 | 1816 | close (fdes); |
8ab3d8a0 KR |
1817 | errno = save_errno; |
1818 | return -1; | |
82893676 | 1819 | } |
8ab3d8a0 KR |
1820 | |
1821 | return close (fdes); | |
82893676 | 1822 | } |
8ab3d8a0 | 1823 | #endif /* HAVE_FTRUNCATE && ! HAVE_TRUNCATE */ |
82893676 | 1824 | |
a1ec6916 | 1825 | SCM_DEFINE (scm_truncate_file, "truncate-file", 1, 1, 0, |
1bbd0b84 | 1826 | (SCM object, SCM length), |
8ab3d8a0 KR |
1827 | "Truncate @var{file} to @var{length} bytes. @var{file} can be a\n" |
1828 | "filename string, a port object, or an integer file descriptor.\n" | |
1829 | "The return value is unspecified.\n" | |
1830 | "\n" | |
1831 | "For a port or file descriptor @var{length} can be omitted, in\n" | |
1832 | "which case the file is truncated at the current position (per\n" | |
1833 | "@code{ftell} above).\n" | |
1834 | "\n" | |
1835 | "On most systems a file can be extended by giving a length\n" | |
1836 | "greater than the current size, but this is not mandatory in the\n" | |
1837 | "POSIX standard.") | |
1bbd0b84 | 1838 | #define FUNC_NAME s_scm_truncate_file |
840ae05d | 1839 | { |
69bc9ff3 | 1840 | int rv; |
69bc9ff3 | 1841 | |
2b829bbb KR |
1842 | /* "object" can be a port, fdes or filename. |
1843 | ||
1844 | Negative "length" makes no sense, but it's left to truncate() or | |
1845 | ftruncate() to give back an error for that (normally EINVAL). | |
1846 | */ | |
840ae05d | 1847 | |
840ae05d JB |
1848 | if (SCM_UNBNDP (length)) |
1849 | { | |
69bc9ff3 | 1850 | /* must supply length if object is a filename. */ |
7f9994d9 | 1851 | if (scm_is_string (object)) |
34d19ef6 | 1852 | SCM_MISC_ERROR("must supply length if OBJECT is a filename", SCM_EOL); |
69bc9ff3 | 1853 | |
e11e83f3 | 1854 | length = scm_seek (object, SCM_INUM0, scm_from_int (SEEK_CUR)); |
840ae05d | 1855 | } |
3fe6190f | 1856 | |
69bc9ff3 | 1857 | object = SCM_COERCE_OUTPORT (object); |
e11e83f3 | 1858 | if (scm_is_integer (object)) |
69bc9ff3 | 1859 | { |
23f2b9a3 KR |
1860 | off_t_or_off64_t c_length = scm_to_off_t_or_off64_t (length); |
1861 | SCM_SYSCALL (rv = ftruncate_or_ftruncate64 (scm_to_int (object), | |
1862 | c_length)); | |
69bc9ff3 | 1863 | } |
0c95b57d | 1864 | else if (SCM_OPOUTPORTP (object)) |
69bc9ff3 | 1865 | { |
f1ce9199 | 1866 | off_t_or_off64_t c_length = scm_to_off_t_or_off64_t (length); |
92c2555f MV |
1867 | scm_t_port *pt = SCM_PTAB_ENTRY (object); |
1868 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); | |
69bc9ff3 | 1869 | |
affc96b5 | 1870 | if (!ptob->truncate) |
1bbd0b84 | 1871 | SCM_MISC_ERROR ("port is not truncatable", SCM_EOL); |
69bc9ff3 | 1872 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1873 | scm_end_input (object); |
69bc9ff3 | 1874 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1875 | ptob->flush (object); |
69bc9ff3 | 1876 | |
affc96b5 | 1877 | ptob->truncate (object, c_length); |
69bc9ff3 GH |
1878 | rv = 0; |
1879 | } | |
1880 | else | |
1881 | { | |
2b829bbb | 1882 | off_t_or_off64_t c_length = scm_to_off_t_or_off64_t (length); |
7f9994d9 MV |
1883 | char *str = scm_to_locale_string (object); |
1884 | int eno; | |
2b829bbb | 1885 | SCM_SYSCALL (rv = truncate_or_truncate64 (str, c_length)); |
7f9994d9 MV |
1886 | eno = errno; |
1887 | free (str); | |
1888 | errno = eno; | |
69bc9ff3 GH |
1889 | } |
1890 | if (rv == -1) | |
1bbd0b84 | 1891 | SCM_SYSERROR; |
840ae05d JB |
1892 | return SCM_UNSPECIFIED; |
1893 | } | |
1bbd0b84 | 1894 | #undef FUNC_NAME |
840ae05d | 1895 | |
a1ec6916 | 1896 | SCM_DEFINE (scm_port_line, "port-line", 1, 0, 0, |
1bbd0b84 | 1897 | (SCM port), |
a150979d KR |
1898 | "Return the current line number for @var{port}.\n" |
1899 | "\n" | |
1900 | "The first line of a file is 0. But you might want to add 1\n" | |
1901 | "when printing line numbers, since starting from 1 is\n" | |
1902 | "traditional in error messages, and likely to be more natural to\n" | |
1903 | "non-programmers.") | |
1bbd0b84 | 1904 | #define FUNC_NAME s_scm_port_line |
0f2d19dd | 1905 | { |
78446828 | 1906 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1907 | SCM_VALIDATE_OPENPORT (1, port); |
651f2cd2 | 1908 | return scm_from_long (SCM_LINUM (port)); |
0f2d19dd | 1909 | } |
1bbd0b84 | 1910 | #undef FUNC_NAME |
0f2d19dd | 1911 | |
a1ec6916 | 1912 | SCM_DEFINE (scm_set_port_line_x, "set-port-line!", 2, 0, 0, |
1bbd0b84 | 1913 | (SCM port, SCM line), |
a150979d KR |
1914 | "Set the current line number for @var{port} to @var{line}. The\n" |
1915 | "first line of a file is 0.") | |
1bbd0b84 | 1916 | #define FUNC_NAME s_scm_set_port_line_x |
d043d8c2 | 1917 | { |
360fc44c | 1918 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1919 | SCM_VALIDATE_OPENPORT (1, port); |
651f2cd2 | 1920 | SCM_PTAB_ENTRY (port)->line_number = scm_to_long (line); |
564478fd | 1921 | return SCM_UNSPECIFIED; |
d043d8c2 | 1922 | } |
1bbd0b84 | 1923 | #undef FUNC_NAME |
d043d8c2 | 1924 | |
a1ec6916 | 1925 | SCM_DEFINE (scm_port_column, "port-column", 1, 0, 0, |
1bbd0b84 | 1926 | (SCM port), |
a150979d KR |
1927 | "Return the current column number of @var{port}.\n" |
1928 | "If the number is\n" | |
b380b885 MD |
1929 | "unknown, the result is #f. Otherwise, the result is a 0-origin integer\n" |
1930 | "- i.e. the first character of the first line is line 0, column 0.\n" | |
1931 | "(However, when you display a file position, for example in an error\n" | |
650a1cf9 | 1932 | "message, we recommend you add 1 to get 1-origin integers. This is\n" |
b380b885 MD |
1933 | "because lines and column numbers traditionally start with 1, and that is\n" |
1934 | "what non-programmers will find most natural.)") | |
1bbd0b84 | 1935 | #define FUNC_NAME s_scm_port_column |
0f2d19dd | 1936 | { |
78446828 | 1937 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1938 | SCM_VALIDATE_OPENPORT (1, port); |
e11e83f3 | 1939 | return scm_from_int (SCM_COL (port)); |
0f2d19dd | 1940 | } |
1bbd0b84 | 1941 | #undef FUNC_NAME |
0f2d19dd | 1942 | |
a1ec6916 | 1943 | SCM_DEFINE (scm_set_port_column_x, "set-port-column!", 2, 0, 0, |
1bbd0b84 | 1944 | (SCM port, SCM column), |
a150979d KR |
1945 | "Set the current column of @var{port}. Before reading the first\n" |
1946 | "character on a line the column should be 0.") | |
1bbd0b84 | 1947 | #define FUNC_NAME s_scm_set_port_column_x |
d043d8c2 | 1948 | { |
360fc44c | 1949 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1950 | SCM_VALIDATE_OPENPORT (1, port); |
a55c2b68 | 1951 | SCM_PTAB_ENTRY (port)->column_number = scm_to_int (column); |
564478fd | 1952 | return SCM_UNSPECIFIED; |
d043d8c2 | 1953 | } |
1bbd0b84 | 1954 | #undef FUNC_NAME |
d043d8c2 | 1955 | |
a1ec6916 | 1956 | SCM_DEFINE (scm_port_filename, "port-filename", 1, 0, 0, |
1bbd0b84 | 1957 | (SCM port), |
b380b885 | 1958 | "Return the filename associated with @var{port}. This function returns\n" |
2a2a730b | 1959 | "the strings \"standard input\", \"standard output\" and \"standard error\"\n" |
a3c8b9fc | 1960 | "when called on the current input, output and error ports respectively.") |
1bbd0b84 | 1961 | #define FUNC_NAME s_scm_port_filename |
0f2d19dd | 1962 | { |
78446828 | 1963 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1964 | SCM_VALIDATE_OPENPORT (1, port); |
b24b5e13 | 1965 | return SCM_FILENAME (port); |
0f2d19dd | 1966 | } |
1bbd0b84 | 1967 | #undef FUNC_NAME |
0f2d19dd | 1968 | |
a1ec6916 | 1969 | SCM_DEFINE (scm_set_port_filename_x, "set-port-filename!", 2, 0, 0, |
1bbd0b84 | 1970 | (SCM port, SCM filename), |
b380b885 MD |
1971 | "Change the filename associated with @var{port}, using the current input\n" |
1972 | "port if none is specified. Note that this does not change the port's\n" | |
1973 | "source of data, but only the value that is returned by\n" | |
1974 | "@code{port-filename} and reported in diagnostic output.") | |
1bbd0b84 | 1975 | #define FUNC_NAME s_scm_set_port_filename_x |
d14af9f2 | 1976 | { |
360fc44c | 1977 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1978 | SCM_VALIDATE_OPENPORT (1, port); |
360fc44c | 1979 | /* We allow the user to set the filename to whatever he likes. */ |
b24b5e13 DH |
1980 | SCM_SET_FILENAME (port, filename); |
1981 | return SCM_UNSPECIFIED; | |
d14af9f2 | 1982 | } |
1bbd0b84 | 1983 | #undef FUNC_NAME |
d14af9f2 | 1984 | |
d6a6989e LC |
1985 | /* A fluid specifying the default encoding for newly created ports. If it is |
1986 | a string, that is the encoding. If it is #f, it is in the "native" | |
1987 | (Latin-1) encoding. */ | |
1988 | SCM_VARIABLE (default_port_encoding_var, "%default-port-encoding"); | |
1989 | ||
889975e5 MG |
1990 | static int scm_port_encoding_init = 0; |
1991 | ||
1992 | /* Return a C string representation of the current encoding. */ | |
1993 | const char * | |
1994 | scm_i_get_port_encoding (SCM port) | |
1995 | { | |
1996 | SCM encoding; | |
1997 | ||
1998 | if (scm_is_false (port)) | |
1999 | { | |
2000 | if (!scm_port_encoding_init) | |
2001 | return NULL; | |
d6a6989e | 2002 | else if (!scm_is_fluid (SCM_VARIABLE_REF (default_port_encoding_var))) |
889975e5 MG |
2003 | return NULL; |
2004 | else | |
2005 | { | |
d6a6989e | 2006 | encoding = scm_fluid_ref (SCM_VARIABLE_REF (default_port_encoding_var)); |
889975e5 MG |
2007 | if (!scm_is_string (encoding)) |
2008 | return NULL; | |
2009 | else | |
2010 | return scm_i_string_chars (encoding); | |
2011 | } | |
2012 | } | |
2013 | else | |
2014 | { | |
2015 | scm_t_port *pt; | |
2016 | pt = SCM_PTAB_ENTRY (port); | |
2017 | if (pt->encoding) | |
2018 | return pt->encoding; | |
2019 | else | |
2020 | return NULL; | |
2021 | } | |
2022 | } | |
2023 | ||
b77afe82 | 2024 | /* Returns ENC if it is a recognized encoding. If it isn't, it tries |
889975e5 MG |
2025 | to find an alias of ENC that is valid. Otherwise, it returns |
2026 | NULL. */ | |
2027 | static const char * | |
2028 | find_valid_encoding (const char *enc) | |
2029 | { | |
2030 | int isvalid = 0; | |
2031 | const char str[] = " "; | |
63479112 | 2032 | scm_t_uint32 result_buf; |
889975e5 MG |
2033 | scm_t_uint32 *u32; |
2034 | size_t u32len; | |
63479112 LC |
2035 | |
2036 | u32len = sizeof (result_buf) / sizeof (scm_t_uint32); | |
889975e5 | 2037 | u32 = u32_conv_from_encoding (enc, iconveh_error, str, 1, |
63479112 | 2038 | NULL, &result_buf, &u32len); |
889975e5 | 2039 | isvalid = (u32 != NULL); |
63479112 LC |
2040 | |
2041 | if (SCM_UNLIKELY (u32 != &result_buf)) | |
2042 | free (u32); | |
2043 | ||
889975e5 MG |
2044 | if (isvalid) |
2045 | return enc; | |
2046 | ||
2047 | return NULL; | |
2048 | } | |
2049 | ||
2050 | void | |
2051 | scm_i_set_port_encoding_x (SCM port, const char *enc) | |
2052 | { | |
2053 | const char *valid_enc; | |
2054 | scm_t_port *pt; | |
2055 | ||
2056 | /* Null is shorthand for the native, Latin-1 encoding. */ | |
2057 | if (enc == NULL) | |
2058 | valid_enc = NULL; | |
2059 | else | |
2060 | { | |
2061 | valid_enc = find_valid_encoding (enc); | |
2062 | if (valid_enc == NULL) | |
2063 | { | |
2064 | SCM err; | |
2065 | err = scm_from_locale_string (enc); | |
2066 | scm_misc_error (NULL, "invalid or unknown character encoding ~s", | |
2067 | scm_list_1 (err)); | |
2068 | } | |
2069 | } | |
2070 | ||
2071 | if (scm_is_false (port)) | |
2072 | { | |
2073 | /* Set the default encoding for future ports. */ | |
2074 | if (!scm_port_encoding_init | |
d6a6989e | 2075 | || !scm_is_fluid (SCM_VARIABLE_REF (default_port_encoding_var))) |
889975e5 MG |
2076 | scm_misc_error (NULL, "tried to set port encoding fluid before it is initialized", |
2077 | SCM_EOL); | |
2078 | ||
2079 | if (valid_enc == NULL | |
2080 | || !strcmp (valid_enc, "ASCII") | |
2081 | || !strcmp (valid_enc, "ANSI_X3.4-1968") | |
2082 | || !strcmp (valid_enc, "ISO-8859-1")) | |
d6a6989e | 2083 | scm_fluid_set_x (SCM_VARIABLE_REF (default_port_encoding_var), SCM_BOOL_F); |
889975e5 | 2084 | else |
d6a6989e | 2085 | scm_fluid_set_x (SCM_VARIABLE_REF (default_port_encoding_var), |
889975e5 MG |
2086 | scm_from_locale_string (valid_enc)); |
2087 | } | |
2088 | else | |
2089 | { | |
2090 | /* Set the character encoding for this port. */ | |
2091 | pt = SCM_PTAB_ENTRY (port); | |
889975e5 MG |
2092 | if (valid_enc == NULL) |
2093 | pt->encoding = NULL; | |
2094 | else | |
682d78d0 | 2095 | pt->encoding = scm_gc_strdup (valid_enc, "port"); |
889975e5 MG |
2096 | } |
2097 | } | |
2098 | ||
2099 | SCM_DEFINE (scm_port_encoding, "port-encoding", 1, 0, 0, | |
2100 | (SCM port), | |
2101 | "Returns, as a string, the character encoding that @var{port}\n" | |
2102 | "uses to interpret its input and output.\n") | |
2103 | #define FUNC_NAME s_scm_port_encoding | |
2104 | { | |
2105 | scm_t_port *pt; | |
2106 | const char *enc; | |
2107 | ||
2108 | SCM_VALIDATE_PORT (1, port); | |
2109 | ||
2110 | pt = SCM_PTAB_ENTRY (port); | |
2111 | enc = scm_i_get_port_encoding (port); | |
2112 | if (enc) | |
2113 | return scm_from_locale_string (pt->encoding); | |
2114 | else | |
0af34a3f | 2115 | return SCM_BOOL_F; |
889975e5 MG |
2116 | } |
2117 | #undef FUNC_NAME | |
d6a6989e | 2118 | |
889975e5 MG |
2119 | SCM_DEFINE (scm_set_port_encoding_x, "set-port-encoding!", 2, 0, 0, |
2120 | (SCM port, SCM enc), | |
2121 | "Sets the character encoding that will be used to interpret all\n" | |
2122 | "port I/O. New ports are created with the encoding\n" | |
2123 | "appropriate for the current locale if @code{setlocale} has \n" | |
2124 | "been called or ISO-8859-1 otherwise\n" | |
2125 | "and this procedure can be used to modify that encoding.\n") | |
889975e5 MG |
2126 | #define FUNC_NAME s_scm_set_port_encoding_x |
2127 | { | |
2128 | char *enc_str; | |
2129 | const char *valid_enc_str; | |
2130 | ||
2131 | SCM_VALIDATE_PORT (1, port); | |
2132 | SCM_VALIDATE_STRING (2, enc); | |
2133 | ||
2134 | enc_str = scm_to_locale_string (enc); | |
2135 | valid_enc_str = find_valid_encoding (enc_str); | |
2136 | if (valid_enc_str == NULL) | |
2137 | { | |
2138 | free (enc_str); | |
2139 | scm_misc_error (FUNC_NAME, "invalid or unknown character encoding ~s", | |
2140 | scm_list_1 (enc)); | |
2141 | } | |
2142 | else | |
2143 | { | |
2144 | scm_i_set_port_encoding_x (port, valid_enc_str); | |
2145 | free (enc_str); | |
2146 | } | |
2147 | return SCM_UNSPECIFIED; | |
2148 | } | |
2149 | #undef FUNC_NAME | |
2150 | ||
2151 | ||
2152 | /* This determines how conversions handle unconvertible characters. */ | |
2153 | SCM_GLOBAL_VARIABLE (scm_conversion_strategy, "%port-conversion-strategy"); | |
2154 | static int scm_conversion_strategy_init = 0; | |
2155 | ||
2156 | scm_t_string_failed_conversion_handler | |
2157 | scm_i_get_conversion_strategy (SCM port) | |
2158 | { | |
2159 | SCM encoding; | |
2160 | ||
2161 | if (scm_is_false (port)) | |
2162 | { | |
2163 | if (!scm_conversion_strategy_init | |
2164 | || !scm_is_fluid (SCM_VARIABLE_REF (scm_conversion_strategy))) | |
2165 | return SCM_FAILED_CONVERSION_QUESTION_MARK; | |
2166 | else | |
2167 | { | |
2168 | encoding = scm_fluid_ref (SCM_VARIABLE_REF (scm_conversion_strategy)); | |
2169 | if (scm_is_false (encoding)) | |
2170 | return SCM_FAILED_CONVERSION_QUESTION_MARK; | |
2171 | else | |
2172 | return (scm_t_string_failed_conversion_handler) scm_to_int (encoding); | |
2173 | } | |
2174 | } | |
2175 | else | |
2176 | { | |
2177 | scm_t_port *pt; | |
2178 | pt = SCM_PTAB_ENTRY (port); | |
e1ee45e7 | 2179 | return pt->ilseq_handler; |
889975e5 MG |
2180 | } |
2181 | ||
2182 | } | |
2183 | ||
2184 | void | |
2185 | scm_i_set_conversion_strategy_x (SCM port, | |
2186 | scm_t_string_failed_conversion_handler handler) | |
2187 | { | |
2188 | SCM strategy; | |
2189 | scm_t_port *pt; | |
2190 | ||
2191 | strategy = scm_from_int ((int) handler); | |
2192 | ||
2193 | if (scm_is_false (port)) | |
2194 | { | |
2195 | /* Set the default encoding for future ports. */ | |
2196 | if (!scm_conversion_strategy | |
2197 | || !scm_is_fluid (SCM_VARIABLE_REF (scm_conversion_strategy))) | |
2198 | scm_misc_error (NULL, "tried to set conversion strategy fluid before it is initialized", | |
2199 | SCM_EOL); | |
2200 | scm_fluid_set_x (SCM_VARIABLE_REF (scm_conversion_strategy), strategy); | |
2201 | } | |
2202 | else | |
2203 | { | |
2204 | /* Set the character encoding for this port. */ | |
2205 | pt = SCM_PTAB_ENTRY (port); | |
2206 | pt->ilseq_handler = handler; | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | SCM_DEFINE (scm_port_conversion_strategy, "port-conversion-strategy", | |
2211 | 1, 0, 0, (SCM port), | |
2212 | "Returns the behavior of the port when handling a character that\n" | |
2213 | "is not representable in the port's current encoding.\n" | |
2214 | "It returns the symbol @code{error} if unrepresentable characters\n" | |
2215 | "should cause exceptions, @code{substitute} if the port should\n" | |
2216 | "try to replace unrepresentable characters with question marks or\n" | |
2217 | "approximate characters, or @code{escape} if unrepresentable\n" | |
2218 | "characters should be converted to string escapes.\n" | |
2219 | "\n" | |
2220 | "If @var{port} is @code{#f}, then the current default behavior\n" | |
2221 | "will be returned. New ports will have this default behavior\n" | |
2222 | "when they are created.\n") | |
2223 | #define FUNC_NAME s_scm_port_conversion_strategy | |
2224 | { | |
2225 | scm_t_string_failed_conversion_handler h; | |
2226 | ||
2227 | SCM_VALIDATE_OPPORT (1, port); | |
2228 | ||
2229 | if (!scm_is_false (port)) | |
2230 | { | |
2231 | SCM_VALIDATE_OPPORT (1, port); | |
2232 | } | |
2233 | ||
2234 | h = scm_i_get_conversion_strategy (port); | |
2235 | if (h == SCM_FAILED_CONVERSION_ERROR) | |
2236 | return scm_from_locale_symbol ("error"); | |
2237 | else if (h == SCM_FAILED_CONVERSION_QUESTION_MARK) | |
2238 | return scm_from_locale_symbol ("substitute"); | |
2239 | else if (h == SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE) | |
2240 | return scm_from_locale_symbol ("escape"); | |
2241 | else | |
2242 | abort (); | |
2243 | ||
2244 | /* Never gets here. */ | |
2245 | return SCM_UNDEFINED; | |
2246 | } | |
2247 | #undef FUNC_NAME | |
2248 | ||
2249 | SCM_DEFINE (scm_set_port_conversion_strategy_x, "set-port-conversion-strategy!", | |
2250 | 2, 0, 0, | |
2251 | (SCM port, SCM sym), | |
2252 | "Sets the behavior of the interpreter when outputting a character\n" | |
2253 | "that is not representable in the port's current encoding.\n" | |
2254 | "@var{sym} can be either @code{'error}, @code{'substitute}, or\n" | |
2255 | "@code{'escape}. If it is @code{'error}, an error will be thrown\n" | |
2256 | "when an unconvertible character is encountered. If it is\n" | |
2257 | "@code{'substitute}, then unconvertible characters will \n" | |
2258 | "be replaced with approximate characters, or with question marks\n" | |
2259 | "if no approximately correct character is available.\n" | |
2260 | "If it is @code{'escape},\n" | |
2261 | "it will appear as a hex escape when output.\n" | |
2262 | "\n" | |
2263 | "If @var{port} is an open port, the conversion error behavior\n" | |
2264 | "is set for that port. If it is @code{#f}, it is set as the\n" | |
2265 | "default behavior for any future ports that get created in\n" | |
2266 | "this thread.\n") | |
2267 | #define FUNC_NAME s_scm_set_port_conversion_strategy_x | |
2268 | { | |
2269 | SCM err; | |
2270 | SCM qm; | |
2271 | SCM esc; | |
2272 | ||
2273 | if (!scm_is_false (port)) | |
2274 | { | |
2275 | SCM_VALIDATE_OPPORT (1, port); | |
2276 | } | |
2277 | ||
2278 | err = scm_from_locale_symbol ("error"); | |
2279 | if (scm_is_true (scm_eqv_p (sym, err))) | |
2280 | { | |
2281 | scm_i_set_conversion_strategy_x (port, SCM_FAILED_CONVERSION_ERROR); | |
2282 | return SCM_UNSPECIFIED; | |
2283 | } | |
2284 | ||
2285 | qm = scm_from_locale_symbol ("substitute"); | |
2286 | if (scm_is_true (scm_eqv_p (sym, qm))) | |
2287 | { | |
2288 | scm_i_set_conversion_strategy_x (port, | |
2289 | SCM_FAILED_CONVERSION_QUESTION_MARK); | |
2290 | return SCM_UNSPECIFIED; | |
2291 | } | |
2292 | ||
2293 | esc = scm_from_locale_symbol ("escape"); | |
2294 | if (scm_is_true (scm_eqv_p (sym, esc))) | |
2295 | { | |
2296 | scm_i_set_conversion_strategy_x (port, | |
2297 | SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE); | |
2298 | return SCM_UNSPECIFIED; | |
2299 | } | |
2300 | ||
2301 | SCM_MISC_ERROR ("unknown conversion behavior ~s", scm_list_1 (sym)); | |
2302 | ||
2303 | return SCM_UNSPECIFIED; | |
2304 | } | |
2305 | #undef FUNC_NAME | |
2306 | ||
2307 | ||
2308 | ||
f12733c9 MD |
2309 | void |
2310 | scm_print_port_mode (SCM exp, SCM port) | |
2311 | { | |
2312 | scm_puts (SCM_CLOSEDP (exp) | |
2313 | ? "closed: " | |
f9a64404 DH |
2314 | : (SCM_RDNG & SCM_CELL_WORD_0 (exp) |
2315 | ? (SCM_WRTNG & SCM_CELL_WORD_0 (exp) | |
f12733c9 MD |
2316 | ? "input-output: " |
2317 | : "input: ") | |
f9a64404 | 2318 | : (SCM_WRTNG & SCM_CELL_WORD_0 (exp) |
f12733c9 MD |
2319 | ? "output: " |
2320 | : "bogus: ")), | |
2321 | port); | |
2322 | } | |
1cc91f1b | 2323 | |
f12733c9 | 2324 | int |
e81d98ec | 2325 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 2326 | { |
f12733c9 MD |
2327 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
2328 | if (!type) | |
2329 | type = "port"; | |
b7f3516f | 2330 | scm_puts ("#<", port); |
f12733c9 | 2331 | scm_print_port_mode (exp, port); |
b7f3516f TT |
2332 | scm_puts (type, port); |
2333 | scm_putc (' ', port); | |
0345e278 | 2334 | scm_uintprint (SCM_CELL_WORD_1 (exp), 16, port); |
b7f3516f | 2335 | scm_putc ('>', port); |
f12733c9 | 2336 | return 1; |
0f2d19dd JB |
2337 | } |
2338 | ||
0f2d19dd | 2339 | \f |
ee149d03 | 2340 | |
d68fee48 | 2341 | /* Void ports. */ |
0f2d19dd | 2342 | |
92c2555f | 2343 | scm_t_bits scm_tc16_void_port = 0; |
0f2d19dd | 2344 | |
e81d98ec | 2345 | static int fill_input_void_port (SCM port SCM_UNUSED) |
283a1a0e | 2346 | { |
70df8af6 | 2347 | return EOF; |
283a1a0e GH |
2348 | } |
2349 | ||
31703ab8 | 2350 | static void |
e81d98ec DH |
2351 | write_void_port (SCM port SCM_UNUSED, |
2352 | const void *data SCM_UNUSED, | |
2353 | size_t size SCM_UNUSED) | |
31703ab8 GH |
2354 | { |
2355 | } | |
2356 | ||
d617ee18 MV |
2357 | static SCM |
2358 | scm_i_void_port (long mode_bits) | |
0f2d19dd | 2359 | { |
9de87eea | 2360 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
402788a9 | 2361 | { |
da220f27 HWN |
2362 | SCM answer = scm_new_port_table_entry (scm_tc16_void_port); |
2363 | scm_t_port * pt = SCM_PTAB_ENTRY(answer); | |
2364 | ||
402788a9 | 2365 | scm_port_non_buffer (pt); |
402788a9 HWN |
2366 | |
2367 | SCM_SETSTREAM (answer, 0); | |
2368 | SCM_SET_CELL_TYPE (answer, scm_tc16_void_port | mode_bits); | |
9de87eea | 2369 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
402788a9 HWN |
2370 | return answer; |
2371 | } | |
0f2d19dd JB |
2372 | } |
2373 | ||
d617ee18 MV |
2374 | SCM |
2375 | scm_void_port (char *mode_str) | |
2376 | { | |
2377 | return scm_i_void_port (scm_mode_bits (mode_str)); | |
2378 | } | |
2379 | ||
a1ec6916 | 2380 | SCM_DEFINE (scm_sys_make_void_port, "%make-void-port", 1, 0, 0, |
1bbd0b84 | 2381 | (SCM mode), |
70df8af6 | 2382 | "Create and return a new void port. A void port acts like\n" |
bb2c02f2 | 2383 | "@file{/dev/null}. The @var{mode} argument\n" |
70df8af6 | 2384 | "specifies the input/output modes for this port: see the\n" |
b380b885 | 2385 | "documentation for @code{open-file} in @ref{File Ports}.") |
1bbd0b84 | 2386 | #define FUNC_NAME s_scm_sys_make_void_port |
0f2d19dd | 2387 | { |
d617ee18 | 2388 | return scm_i_void_port (scm_i_mode_bits (mode)); |
0f2d19dd | 2389 | } |
1bbd0b84 | 2390 | #undef FUNC_NAME |
0f2d19dd | 2391 | |
0f2d19dd | 2392 | \f |
89545eba | 2393 | /* Initialization. */ |
1cc91f1b | 2394 | |
0f2d19dd JB |
2395 | void |
2396 | scm_init_ports () | |
0f2d19dd | 2397 | { |
840ae05d | 2398 | /* lseek() symbols. */ |
e11e83f3 MV |
2399 | scm_c_define ("SEEK_SET", scm_from_int (SEEK_SET)); |
2400 | scm_c_define ("SEEK_CUR", scm_from_int (SEEK_CUR)); | |
2401 | scm_c_define ("SEEK_END", scm_from_int (SEEK_END)); | |
840ae05d | 2402 | |
70df8af6 GH |
2403 | scm_tc16_void_port = scm_make_port_type ("void", fill_input_void_port, |
2404 | write_void_port); | |
9de87eea | 2405 | |
f39448c5 AW |
2406 | cur_inport_fluid = scm_make_fluid (); |
2407 | cur_outport_fluid = scm_make_fluid (); | |
2408 | cur_errport_fluid = scm_make_fluid (); | |
2409 | cur_loadport_fluid = scm_make_fluid (); | |
9de87eea | 2410 | |
f39448c5 | 2411 | scm_i_port_weak_hash = scm_make_weak_key_hash_table (SCM_I_MAKINUM(31)); |
d6a6989e | 2412 | |
a0599745 | 2413 | #include "libguile/ports.x" |
889975e5 | 2414 | |
d6a6989e LC |
2415 | /* Use Latin-1 as the default port encoding. */ |
2416 | SCM_VARIABLE_SET (default_port_encoding_var, scm_make_fluid ()); | |
2417 | scm_fluid_set_x (SCM_VARIABLE_REF (default_port_encoding_var), SCM_BOOL_F); | |
889975e5 | 2418 | scm_port_encoding_init = 1; |
d6a6989e | 2419 | |
889975e5 MG |
2420 | SCM_VARIABLE_SET (scm_conversion_strategy, scm_make_fluid ()); |
2421 | scm_fluid_set_x (SCM_VARIABLE_REF (scm_conversion_strategy), | |
2422 | scm_from_int ((int) SCM_FAILED_CONVERSION_QUESTION_MARK)); | |
2423 | scm_conversion_strategy_init = 1; | |
2424 | ||
0f2d19dd | 2425 | } |
89e00824 ML |
2426 | |
2427 | /* | |
2428 | Local Variables: | |
2429 | c-file-style: "gnu" | |
2430 | End: | |
2431 | */ |