Commit | Line | Data |
---|---|---|
f4bc4e59 LC |
1 | /* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, |
2 | * 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. | |
3 | * | |
73be1d9e | 4 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
5 | * modify it under the terms of the GNU Lesser General Public License |
6 | * as published by the Free Software Foundation; either version 3 of | |
7 | * the License, or (at your option) any later version. | |
0f2d19dd | 8 | * |
53befeb7 NJ |
9 | * This library is distributed in the hope that it will be useful, but |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. | |
0f2d19dd | 13 | * |
73be1d9e MV |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
17 | * 02110-1301 USA | |
73be1d9e | 18 | */ |
1bbd0b84 | 19 | |
1bbd0b84 | 20 | |
0f2d19dd | 21 | \f |
d68fee48 JB |
22 | /* Headers. */ |
23 | ||
2b829bbb KR |
24 | #define _LARGEFILE64_SOURCE /* ask for stat64 etc */ |
25 | ||
dbb605f5 | 26 | #ifdef HAVE_CONFIG_H |
bd515f37 RB |
27 | # include <config.h> |
28 | #endif | |
29 | ||
0f2d19dd | 30 | #include <stdio.h> |
e6e2e95a | 31 | #include <errno.h> |
8ab3d8a0 | 32 | #include <fcntl.h> /* for chsize on mingw */ |
b5cb4464 | 33 | #include <assert.h> |
f4bc4e59 | 34 | #include <iconv.h> |
889975e5 MG |
35 | #include <uniconv.h> |
36 | #include <unistr.h> | |
37 | #include <striconveh.h> | |
e6e2e95a | 38 | |
fca43887 LC |
39 | #include <assert.h> |
40 | ||
a0599745 | 41 | #include "libguile/_scm.h" |
4e047c3e | 42 | #include "libguile/async.h" |
f0942910 | 43 | #include "libguile/eval.h" |
8ab3d8a0 | 44 | #include "libguile/fports.h" /* direct access for seek and truncate */ |
9511876f | 45 | #include "libguile/goops.h" |
a0599745 MD |
46 | #include "libguile/smob.h" |
47 | #include "libguile/chars.h" | |
185e369a | 48 | #include "libguile/dynwind.h" |
0f2d19dd | 49 | |
a0599745 | 50 | #include "libguile/keywords.h" |
5dbc6c06 | 51 | #include "libguile/hashtab.h" |
a0599745 MD |
52 | #include "libguile/root.h" |
53 | #include "libguile/strings.h" | |
b42170a4 | 54 | #include "libguile/mallocs.h" |
a0599745 MD |
55 | #include "libguile/validate.h" |
56 | #include "libguile/ports.h" | |
3a5fb14d | 57 | #include "libguile/vectors.h" |
5dbc6c06 | 58 | #include "libguile/weaks.h" |
9de87eea | 59 | #include "libguile/fluids.h" |
889975e5 | 60 | #include "libguile/eq.h" |
0f2d19dd | 61 | |
bd9e24b3 GH |
62 | #ifdef HAVE_STRING_H |
63 | #include <string.h> | |
64 | #endif | |
65 | ||
ec65f5da MV |
66 | #ifdef HAVE_IO_H |
67 | #include <io.h> | |
68 | #endif | |
69 | ||
0f2d19dd JB |
70 | #ifdef HAVE_UNISTD_H |
71 | #include <unistd.h> | |
72 | #endif | |
73 | ||
95b88819 GH |
74 | #ifdef HAVE_SYS_IOCTL_H |
75 | #include <sys/ioctl.h> | |
76 | #endif | |
d68fee48 | 77 | |
8ab3d8a0 KR |
78 | /* Mingw (version 3.4.5, circa 2006) has ftruncate as an alias for chsize |
79 | already, but have this code here in case that wasn't so in past versions, | |
80 | or perhaps to help other minimal DOS environments. | |
81 | ||
82 | gnulib ftruncate.c has code using fcntl F_CHSIZE and F_FREESP, which | |
83 | might be possibilities if we've got other systems without ftruncate. */ | |
84 | ||
56a3dcd4 | 85 | #if defined HAVE_CHSIZE && ! defined HAVE_FTRUNCATE |
82893676 | 86 | #define ftruncate(fd, size) chsize (fd, size) |
8ab3d8a0 KR |
87 | #undef HAVE_FTRUNCATE |
88 | #define HAVE_FTRUNCATE 1 | |
82893676 MG |
89 | #endif |
90 | ||
0f2d19dd | 91 | \f |
d68fee48 | 92 | /* The port kind table --- a dynamically resized array of port types. */ |
0f2d19dd JB |
93 | |
94 | ||
95 | /* scm_ptobs scm_numptob | |
5dbc6c06 | 96 | * implement a dynamically resized array of ptob records. |
0f2d19dd JB |
97 | * Indexes into this table are used when generating type |
98 | * tags for smobjects (if you know a tag you can get an index and conversely). | |
99 | */ | |
dd3a26f3 AW |
100 | scm_t_ptob_descriptor *scm_ptobs = NULL; |
101 | long scm_numptob = 0; | |
0f2d19dd | 102 | |
ee149d03 | 103 | /* GC marker for a port with stream of SCM type. */ |
0f2d19dd | 104 | SCM |
a284e297 | 105 | scm_markstream (SCM ptr) |
0f2d19dd JB |
106 | { |
107 | int openp; | |
f9a64404 | 108 | openp = SCM_CELL_WORD_0 (ptr) & SCM_OPN; |
0f2d19dd | 109 | if (openp) |
74a16888 | 110 | return SCM_PACK (SCM_STREAM (ptr)); |
0f2d19dd JB |
111 | else |
112 | return SCM_BOOL_F; | |
113 | } | |
114 | ||
f12733c9 | 115 | /* |
f12733c9 | 116 | * We choose to use an interface similar to the smob interface with |
affc96b5 | 117 | * fill_input and write as standard fields, passed to the port |
f12733c9 MD |
118 | * type constructor, and optional fields set by setters. |
119 | */ | |
120 | ||
70df8af6 | 121 | static void |
e81d98ec | 122 | flush_port_default (SCM port SCM_UNUSED) |
70df8af6 GH |
123 | { |
124 | } | |
125 | ||
126 | static void | |
e81d98ec | 127 | end_input_default (SCM port SCM_UNUSED, int offset SCM_UNUSED) |
70df8af6 GH |
128 | { |
129 | } | |
0f2d19dd | 130 | |
92c2555f | 131 | scm_t_bits |
f12733c9 | 132 | scm_make_port_type (char *name, |
affc96b5 | 133 | int (*fill_input) (SCM port), |
8aa011a1 | 134 | void (*write) (SCM port, const void *data, size_t size)) |
0f2d19dd JB |
135 | { |
136 | char *tmp; | |
0953b549 | 137 | if (SCM_I_MAX_PORT_TYPE_COUNT - 1 <= scm_numptob) |
0f2d19dd | 138 | goto ptoberr; |
9de87eea | 139 | SCM_CRITICAL_SECTION_START; |
fca43887 LC |
140 | tmp = (char *) scm_gc_realloc ((char *) scm_ptobs, |
141 | scm_numptob * sizeof (scm_t_ptob_descriptor), | |
142 | (1 + scm_numptob) | |
143 | * sizeof (scm_t_ptob_descriptor), | |
144 | "port-type"); | |
0f2d19dd JB |
145 | if (tmp) |
146 | { | |
92c2555f | 147 | scm_ptobs = (scm_t_ptob_descriptor *) tmp; |
affc96b5 | 148 | |
f12733c9 MD |
149 | scm_ptobs[scm_numptob].name = name; |
150 | scm_ptobs[scm_numptob].mark = 0; | |
3051344b | 151 | scm_ptobs[scm_numptob].free = NULL; |
f12733c9 MD |
152 | scm_ptobs[scm_numptob].print = scm_port_print; |
153 | scm_ptobs[scm_numptob].equalp = 0; | |
affc96b5 GH |
154 | scm_ptobs[scm_numptob].close = 0; |
155 | ||
156 | scm_ptobs[scm_numptob].write = write; | |
70df8af6 | 157 | scm_ptobs[scm_numptob].flush = flush_port_default; |
affc96b5 | 158 | |
70df8af6 | 159 | scm_ptobs[scm_numptob].end_input = end_input_default; |
affc96b5 GH |
160 | scm_ptobs[scm_numptob].fill_input = fill_input; |
161 | scm_ptobs[scm_numptob].input_waiting = 0; | |
162 | ||
f12733c9 | 163 | scm_ptobs[scm_numptob].seek = 0; |
affc96b5 GH |
164 | scm_ptobs[scm_numptob].truncate = 0; |
165 | ||
0f2d19dd JB |
166 | scm_numptob++; |
167 | } | |
9de87eea | 168 | SCM_CRITICAL_SECTION_END; |
0f2d19dd | 169 | if (!tmp) |
2500356c DH |
170 | { |
171 | ptoberr: | |
172 | scm_memory_error ("scm_make_port_type"); | |
173 | } | |
f12733c9 | 174 | /* Make a class object if Goops is present */ |
63385df2 | 175 | if (SCM_UNPACK (scm_port_class[0]) != 0) |
f12733c9 | 176 | scm_make_port_classes (scm_numptob - 1, SCM_PTOBNAME (scm_numptob - 1)); |
0f2d19dd JB |
177 | return scm_tc7_port + (scm_numptob - 1) * 256; |
178 | } | |
179 | ||
f12733c9 | 180 | void |
23f2b9a3 | 181 | scm_set_port_mark (scm_t_bits tc, SCM (*mark) (SCM)) |
f12733c9 MD |
182 | { |
183 | scm_ptobs[SCM_TC2PTOBNUM (tc)].mark = mark; | |
184 | } | |
185 | ||
186 | void | |
23f2b9a3 | 187 | scm_set_port_free (scm_t_bits tc, size_t (*free) (SCM)) |
f12733c9 MD |
188 | { |
189 | scm_ptobs[SCM_TC2PTOBNUM (tc)].free = free; | |
190 | } | |
191 | ||
192 | void | |
23f2b9a3 | 193 | scm_set_port_print (scm_t_bits tc, int (*print) (SCM exp, SCM port, |
f12733c9 MD |
194 | scm_print_state *pstate)) |
195 | { | |
196 | scm_ptobs[SCM_TC2PTOBNUM (tc)].print = print; | |
197 | } | |
198 | ||
199 | void | |
23f2b9a3 | 200 | scm_set_port_equalp (scm_t_bits tc, SCM (*equalp) (SCM, SCM)) |
f12733c9 MD |
201 | { |
202 | scm_ptobs[SCM_TC2PTOBNUM (tc)].equalp = equalp; | |
203 | } | |
204 | ||
31703ab8 | 205 | void |
23f2b9a3 | 206 | scm_set_port_flush (scm_t_bits tc, void (*flush) (SCM port)) |
31703ab8 | 207 | { |
affc96b5 | 208 | scm_ptobs[SCM_TC2PTOBNUM (tc)].flush = flush; |
31703ab8 GH |
209 | } |
210 | ||
f12733c9 | 211 | void |
23f2b9a3 | 212 | scm_set_port_end_input (scm_t_bits tc, void (*end_input) (SCM port, int offset)) |
f12733c9 | 213 | { |
affc96b5 | 214 | scm_ptobs[SCM_TC2PTOBNUM (tc)].end_input = end_input; |
f12733c9 MD |
215 | } |
216 | ||
217 | void | |
23f2b9a3 | 218 | scm_set_port_close (scm_t_bits tc, int (*close) (SCM)) |
f12733c9 | 219 | { |
affc96b5 | 220 | scm_ptobs[SCM_TC2PTOBNUM (tc)].close = close; |
f12733c9 MD |
221 | } |
222 | ||
223 | void | |
f1ce9199 LC |
224 | scm_set_port_seek (scm_t_bits tc, |
225 | scm_t_off (*seek) (SCM, scm_t_off, int)) | |
f12733c9 MD |
226 | { |
227 | scm_ptobs[SCM_TC2PTOBNUM (tc)].seek = seek; | |
228 | } | |
229 | ||
230 | void | |
f1ce9199 | 231 | scm_set_port_truncate (scm_t_bits tc, void (*truncate) (SCM, scm_t_off)) |
f12733c9 | 232 | { |
affc96b5 | 233 | scm_ptobs[SCM_TC2PTOBNUM (tc)].truncate = truncate; |
f12733c9 MD |
234 | } |
235 | ||
236 | void | |
23f2b9a3 | 237 | scm_set_port_input_waiting (scm_t_bits tc, int (*input_waiting) (SCM)) |
f12733c9 | 238 | { |
affc96b5 | 239 | scm_ptobs[SCM_TC2PTOBNUM (tc)].input_waiting = input_waiting; |
f12733c9 MD |
240 | } |
241 | ||
0f2d19dd | 242 | \f |
0f2d19dd | 243 | |
3b3b36dd | 244 | SCM_DEFINE (scm_char_ready_p, "char-ready?", 0, 1, 0, |
1e6808ea MG |
245 | (SCM port), |
246 | "Return @code{#t} if a character is ready on input @var{port}\n" | |
247 | "and return @code{#f} otherwise. If @code{char-ready?} returns\n" | |
248 | "@code{#t} then the next @code{read-char} operation on\n" | |
249 | "@var{port} is guaranteed not to hang. If @var{port} is a file\n" | |
250 | "port at end of file then @code{char-ready?} returns @code{#t}.\n" | |
c2dfff19 KR |
251 | "\n" |
252 | "@code{char-ready?} exists to make it possible for a\n" | |
1e6808ea MG |
253 | "program to accept characters from interactive ports without\n" |
254 | "getting stuck waiting for input. Any input editors associated\n" | |
255 | "with such ports must make sure that characters whose existence\n" | |
256 | "has been asserted by @code{char-ready?} cannot be rubbed out.\n" | |
257 | "If @code{char-ready?} were to return @code{#f} at end of file,\n" | |
258 | "a port at end of file would be indistinguishable from an\n" | |
c2dfff19 | 259 | "interactive port that has no ready characters.") |
1bbd0b84 | 260 | #define FUNC_NAME s_scm_char_ready_p |
0f2d19dd | 261 | { |
92c2555f | 262 | scm_t_port *pt; |
6c951427 | 263 | |
0f2d19dd | 264 | if (SCM_UNBNDP (port)) |
9de87eea | 265 | port = scm_current_input_port (); |
b2456dd4 AW |
266 | /* It's possible to close the current input port, so validate even in |
267 | this case. */ | |
268 | SCM_VALIDATE_OPINPORT (1, port); | |
d68fee48 | 269 | |
ae4c4016 JB |
270 | pt = SCM_PTAB_ENTRY (port); |
271 | ||
6c951427 GH |
272 | /* if the current read buffer is filled, or the |
273 | last pushed-back char has been read and the saved buffer is | |
274 | filled, result is true. */ | |
275 | if (pt->read_pos < pt->read_end | |
276 | || (pt->read_buf == pt->putback_buf | |
277 | && pt->saved_read_pos < pt->saved_read_end)) | |
0f2d19dd | 278 | return SCM_BOOL_T; |
ee149d03 JB |
279 | else |
280 | { | |
92c2555f | 281 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; |
ee149d03 | 282 | |
affc96b5 | 283 | if (ptob->input_waiting) |
7888309b | 284 | return scm_from_bool(ptob->input_waiting (port)); |
ee149d03 | 285 | else |
6c951427 | 286 | return SCM_BOOL_T; |
ee149d03 | 287 | } |
0f2d19dd | 288 | } |
1bbd0b84 | 289 | #undef FUNC_NAME |
0f2d19dd | 290 | |
c2da2648 GH |
291 | /* move up to read_len chars from port's putback and/or read buffers |
292 | into memory starting at dest. returns the number of chars moved. */ | |
293 | size_t scm_take_from_input_buffers (SCM port, char *dest, size_t read_len) | |
294 | { | |
92c2555f | 295 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
c2da2648 GH |
296 | size_t chars_read = 0; |
297 | size_t from_buf = min (pt->read_end - pt->read_pos, read_len); | |
298 | ||
299 | if (from_buf > 0) | |
300 | { | |
301 | memcpy (dest, pt->read_pos, from_buf); | |
302 | pt->read_pos += from_buf; | |
303 | chars_read += from_buf; | |
304 | read_len -= from_buf; | |
305 | dest += from_buf; | |
306 | } | |
307 | ||
308 | /* if putback was active, try the real input buffer too. */ | |
309 | if (pt->read_buf == pt->putback_buf) | |
310 | { | |
311 | from_buf = min (pt->saved_read_end - pt->saved_read_pos, read_len); | |
312 | if (from_buf > 0) | |
313 | { | |
314 | memcpy (dest, pt->saved_read_pos, from_buf); | |
315 | pt->saved_read_pos += from_buf; | |
316 | chars_read += from_buf; | |
317 | } | |
318 | } | |
319 | return chars_read; | |
320 | } | |
321 | ||
6c951427 | 322 | /* Clear a port's read buffers, returning the contents. */ |
a1ec6916 | 323 | SCM_DEFINE (scm_drain_input, "drain-input", 1, 0, 0, |
1bbd0b84 | 324 | (SCM port), |
4a151b3d GH |
325 | "This procedure clears a port's input buffers, similar\n" |
326 | "to the way that force-output clears the output buffer. The\n" | |
327 | "contents of the buffers are returned as a single string, e.g.,\n" | |
328 | "\n" | |
329 | "@lisp\n" | |
330 | "(define p (open-input-file ...))\n" | |
331 | "(drain-input p) => empty string, nothing buffered yet.\n" | |
332 | "(unread-char (read-char p) p)\n" | |
333 | "(drain-input p) => initial chars from p, up to the buffer size.\n" | |
334 | "@end lisp\n\n" | |
335 | "Draining the buffers may be useful for cleanly finishing\n" | |
336 | "buffered I/O so that the file descriptor can be used directly\n" | |
337 | "for further input.") | |
1bbd0b84 | 338 | #define FUNC_NAME s_scm_drain_input |
ee149d03 | 339 | { |
840ae05d | 340 | SCM result; |
3a5fb14d | 341 | char *data; |
28a6e1b0 | 342 | scm_t_port *pt; |
c014a02e | 343 | long count; |
ee149d03 | 344 | |
34d19ef6 | 345 | SCM_VALIDATE_OPINPORT (1, port); |
28a6e1b0 | 346 | pt = SCM_PTAB_ENTRY (port); |
840ae05d | 347 | |
6c951427 GH |
348 | count = pt->read_end - pt->read_pos; |
349 | if (pt->read_buf == pt->putback_buf) | |
350 | count += pt->saved_read_end - pt->saved_read_pos; | |
840ae05d | 351 | |
67a72dc1 AW |
352 | if (count) |
353 | { | |
354 | result = scm_i_make_string (count, &data); | |
355 | scm_take_from_input_buffers (port, data, count); | |
356 | } | |
357 | else | |
358 | result = scm_nullstr; | |
359 | ||
840ae05d | 360 | return result; |
ee149d03 | 361 | } |
1bbd0b84 | 362 | #undef FUNC_NAME |
0f2d19dd JB |
363 | |
364 | \f | |
d68fee48 | 365 | /* Standard ports --- current input, output, error, and more(!). */ |
0f2d19dd | 366 | |
889975e5 MG |
367 | static SCM cur_inport_fluid = 0; |
368 | static SCM cur_outport_fluid = 0; | |
369 | static SCM cur_errport_fluid = 0; | |
370 | static SCM cur_loadport_fluid = 0; | |
9de87eea | 371 | |
3b3b36dd | 372 | SCM_DEFINE (scm_current_input_port, "current-input-port", 0, 0, 0, |
e1546b65 MG |
373 | (), |
374 | "Return the current input port. This is the default port used\n" | |
375 | "by many input procedures. Initially, @code{current-input-port}\n" | |
376 | "returns the @dfn{standard input} in Unix and C terminology.") | |
1bbd0b84 | 377 | #define FUNC_NAME s_scm_current_input_port |
0f2d19dd | 378 | { |
889975e5 MG |
379 | if (cur_inport_fluid) |
380 | return scm_fluid_ref (cur_inport_fluid); | |
381 | else | |
382 | return SCM_BOOL_F; | |
0f2d19dd | 383 | } |
1bbd0b84 | 384 | #undef FUNC_NAME |
0f2d19dd | 385 | |
3b3b36dd | 386 | SCM_DEFINE (scm_current_output_port, "current-output-port", 0, 0, 0, |
e1546b65 MG |
387 | (), |
388 | "Return the current output port. This is the default port used\n" | |
9401323e | 389 | "by many output procedures. Initially,\n" |
e1546b65 MG |
390 | "@code{current-output-port} returns the @dfn{standard output} in\n" |
391 | "Unix and C terminology.") | |
1bbd0b84 | 392 | #define FUNC_NAME s_scm_current_output_port |
0f2d19dd | 393 | { |
889975e5 MG |
394 | if (cur_outport_fluid) |
395 | return scm_fluid_ref (cur_outport_fluid); | |
396 | else | |
397 | return SCM_BOOL_F; | |
0f2d19dd | 398 | } |
1bbd0b84 | 399 | #undef FUNC_NAME |
0f2d19dd | 400 | |
3b3b36dd | 401 | SCM_DEFINE (scm_current_error_port, "current-error-port", 0, 0, 0, |
1bbd0b84 | 402 | (), |
b380b885 MD |
403 | "Return the port to which errors and warnings should be sent (the\n" |
404 | "@dfn{standard error} in Unix and C terminology).") | |
1bbd0b84 | 405 | #define FUNC_NAME s_scm_current_error_port |
0f2d19dd | 406 | { |
889975e5 MG |
407 | if (cur_errport_fluid) |
408 | return scm_fluid_ref (cur_errport_fluid); | |
409 | else | |
410 | return SCM_BOOL_F; | |
0f2d19dd | 411 | } |
1bbd0b84 | 412 | #undef FUNC_NAME |
0f2d19dd | 413 | |
3b3b36dd | 414 | SCM_DEFINE (scm_current_load_port, "current-load-port", 0, 0, 0, |
e1546b65 | 415 | (), |
b450f070 | 416 | "Return the current-load-port.\n" |
e1546b65 | 417 | "The load port is used internally by @code{primitive-load}.") |
1bbd0b84 | 418 | #define FUNC_NAME s_scm_current_load_port |
31614d8e | 419 | { |
9de87eea | 420 | return scm_fluid_ref (cur_loadport_fluid); |
31614d8e | 421 | } |
1bbd0b84 | 422 | #undef FUNC_NAME |
31614d8e | 423 | |
3b3b36dd | 424 | SCM_DEFINE (scm_set_current_input_port, "set-current-input-port", 1, 0, 0, |
1bbd0b84 | 425 | (SCM port), |
8f85c0c6 NJ |
426 | "@deffnx {Scheme Procedure} set-current-output-port port\n" |
427 | "@deffnx {Scheme Procedure} set-current-error-port port\n" | |
b380b885 MD |
428 | "Change the ports returned by @code{current-input-port},\n" |
429 | "@code{current-output-port} and @code{current-error-port}, respectively,\n" | |
430 | "so that they use the supplied @var{port} for input or output.") | |
1bbd0b84 | 431 | #define FUNC_NAME s_scm_set_current_input_port |
0f2d19dd | 432 | { |
9de87eea | 433 | SCM oinp = scm_fluid_ref (cur_inport_fluid); |
34d19ef6 | 434 | SCM_VALIDATE_OPINPORT (1, port); |
9de87eea | 435 | scm_fluid_set_x (cur_inport_fluid, port); |
0f2d19dd JB |
436 | return oinp; |
437 | } | |
1bbd0b84 | 438 | #undef FUNC_NAME |
0f2d19dd JB |
439 | |
440 | ||
3b3b36dd | 441 | SCM_DEFINE (scm_set_current_output_port, "set-current-output-port", 1, 0, 0, |
e1546b65 MG |
442 | (SCM port), |
443 | "Set the current default output port to @var{port}.") | |
1bbd0b84 | 444 | #define FUNC_NAME s_scm_set_current_output_port |
0f2d19dd | 445 | { |
9de87eea | 446 | SCM ooutp = scm_fluid_ref (cur_outport_fluid); |
78446828 | 447 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 448 | SCM_VALIDATE_OPOUTPORT (1, port); |
9de87eea | 449 | scm_fluid_set_x (cur_outport_fluid, port); |
0f2d19dd JB |
450 | return ooutp; |
451 | } | |
1bbd0b84 | 452 | #undef FUNC_NAME |
0f2d19dd JB |
453 | |
454 | ||
3b3b36dd | 455 | SCM_DEFINE (scm_set_current_error_port, "set-current-error-port", 1, 0, 0, |
e1546b65 MG |
456 | (SCM port), |
457 | "Set the current default error port to @var{port}.") | |
1bbd0b84 | 458 | #define FUNC_NAME s_scm_set_current_error_port |
0f2d19dd | 459 | { |
9de87eea | 460 | SCM oerrp = scm_fluid_ref (cur_errport_fluid); |
78446828 | 461 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 462 | SCM_VALIDATE_OPOUTPORT (1, port); |
9de87eea | 463 | scm_fluid_set_x (cur_errport_fluid, port); |
0f2d19dd JB |
464 | return oerrp; |
465 | } | |
1bbd0b84 | 466 | #undef FUNC_NAME |
0f2d19dd | 467 | |
185e369a | 468 | void |
661ae7ab | 469 | scm_dynwind_current_input_port (SCM port) |
9de87eea | 470 | #define FUNC_NAME NULL |
185e369a | 471 | { |
9de87eea | 472 | SCM_VALIDATE_OPINPORT (1, port); |
661ae7ab | 473 | scm_dynwind_fluid (cur_inport_fluid, port); |
185e369a | 474 | } |
9de87eea | 475 | #undef FUNC_NAME |
185e369a MV |
476 | |
477 | void | |
661ae7ab | 478 | scm_dynwind_current_output_port (SCM port) |
9de87eea | 479 | #define FUNC_NAME NULL |
185e369a | 480 | { |
9de87eea MV |
481 | port = SCM_COERCE_OUTPORT (port); |
482 | SCM_VALIDATE_OPOUTPORT (1, port); | |
661ae7ab | 483 | scm_dynwind_fluid (cur_outport_fluid, port); |
185e369a | 484 | } |
9de87eea | 485 | #undef FUNC_NAME |
185e369a MV |
486 | |
487 | void | |
661ae7ab | 488 | scm_dynwind_current_error_port (SCM port) |
9de87eea MV |
489 | #define FUNC_NAME NULL |
490 | { | |
491 | port = SCM_COERCE_OUTPORT (port); | |
492 | SCM_VALIDATE_OPOUTPORT (1, port); | |
661ae7ab | 493 | scm_dynwind_fluid (cur_errport_fluid, port); |
9de87eea MV |
494 | } |
495 | #undef FUNC_NAME | |
496 | ||
497 | void | |
661ae7ab | 498 | scm_i_dynwind_current_load_port (SCM port) |
185e369a | 499 | { |
661ae7ab | 500 | scm_dynwind_fluid (cur_loadport_fluid, port); |
185e369a MV |
501 | } |
502 | ||
0f2d19dd | 503 | \f |
840ae05d | 504 | /* The port table --- an array of pointers to ports. */ |
0f2d19dd | 505 | |
5dbc6c06 HWN |
506 | /* |
507 | We need a global registry of ports to flush them all at exit, and to | |
508 | get all the ports matching a file descriptor. | |
509 | */ | |
510 | SCM scm_i_port_weak_hash; | |
0f2d19dd | 511 | |
9de87eea | 512 | scm_i_pthread_mutex_t scm_i_port_table_mutex = SCM_I_PTHREAD_MUTEX_INITIALIZER; |
b9ad392e | 513 | |
651a0735 LC |
514 | \f |
515 | /* Port finalization. */ | |
516 | ||
1cc91f1b | 517 | |
651a0735 LC |
518 | static void finalize_port (GC_PTR, GC_PTR); |
519 | ||
f4bc4e59 | 520 | /* Register a finalizer for PORT. */ |
651a0735 LC |
521 | static SCM_C_INLINE_KEYWORD void |
522 | register_finalizer_for_port (SCM port) | |
523 | { | |
524 | long port_type; | |
f4bc4e59 LC |
525 | GC_finalization_proc prev_finalizer; |
526 | GC_PTR prev_finalization_data; | |
651a0735 LC |
527 | |
528 | port_type = SCM_TC2PTOBNUM (SCM_CELL_TYPE (port)); | |
651a0735 | 529 | |
f4bc4e59 LC |
530 | /* Register a finalizer for PORT so that its iconv CDs get freed and |
531 | optionally its type's `free' function gets called. */ | |
532 | GC_REGISTER_FINALIZER_NO_ORDER (SCM2PTR (port), finalize_port, 0, | |
533 | &prev_finalizer, | |
534 | &prev_finalization_data); | |
651a0735 LC |
535 | } |
536 | ||
537 | /* Finalize the object (a port) pointed to by PTR. */ | |
538 | static void | |
539 | finalize_port (GC_PTR ptr, GC_PTR data) | |
540 | { | |
541 | long port_type; | |
542 | SCM port = PTR2SCM (ptr); | |
543 | ||
544 | if (!SCM_PORTP (port)) | |
545 | abort (); | |
546 | ||
547 | if (SCM_OPENP (port)) | |
548 | { | |
549 | if (SCM_REVEALED (port) > 0) | |
550 | /* Keep "revealed" ports alive and re-register a finalizer. */ | |
551 | register_finalizer_for_port (port); | |
552 | else | |
553 | { | |
f4bc4e59 LC |
554 | scm_t_port *entry; |
555 | ||
651a0735 LC |
556 | port_type = SCM_TC2PTOBNUM (SCM_CELL_TYPE (port)); |
557 | if (port_type >= scm_numptob) | |
558 | abort (); | |
559 | ||
560 | if (scm_ptobs[port_type].free) | |
561 | /* Yes, I really do mean `.free' rather than `.close'. `.close' | |
562 | is for explicit `close-port' by user. */ | |
563 | scm_ptobs[port_type].free (port); | |
564 | ||
f4bc4e59 LC |
565 | entry = SCM_PTAB_ENTRY (port); |
566 | ||
567 | if (entry->input_cd != (iconv_t) -1) | |
568 | iconv_close (entry->input_cd); | |
569 | if (entry->output_cd != (iconv_t) -1) | |
570 | iconv_close (entry->output_cd); | |
571 | ||
651a0735 LC |
572 | SCM_SETSTREAM (port, 0); |
573 | SCM_CLR_PORT_OPEN_FLAG (port); | |
651a0735 LC |
574 | |
575 | scm_gc_ports_collected++; | |
576 | } | |
577 | } | |
578 | } | |
579 | ||
580 | ||
581 | ||
582 | \f | |
583 | ||
584 | /* This function is not and should not be thread safe. */ | |
da220f27 HWN |
585 | SCM |
586 | scm_new_port_table_entry (scm_t_bits tag) | |
402788a9 | 587 | #define FUNC_NAME "scm_new_port_table_entry" |
0f2d19dd | 588 | { |
85835e59 HWN |
589 | /* |
590 | We initialize the cell to empty, this is in case scm_gc_calloc | |
591 | triggers GC ; we don't want the GC to scan a half-finished Z. | |
592 | */ | |
593 | ||
67329a9e | 594 | SCM z = scm_cons (SCM_EOL, SCM_EOL); |
39e8f371 | 595 | scm_t_port *entry = (scm_t_port *) scm_gc_calloc (sizeof (scm_t_port), "port"); |
889975e5 | 596 | const char *enc; |
5f16b897 | 597 | |
840ae05d | 598 | entry->file_name = SCM_BOOL_F; |
61e452ba | 599 | entry->rw_active = SCM_PORT_NEITHER; |
5dbc6c06 | 600 | entry->port = z; |
889975e5 MG |
601 | /* Initialize this port with the thread's current default |
602 | encoding. */ | |
603 | if ((enc = scm_i_get_port_encoding (SCM_BOOL_F)) == NULL) | |
604 | entry->encoding = NULL; | |
605 | else | |
682d78d0 | 606 | entry->encoding = scm_gc_strdup (enc, "port"); |
f4bc4e59 LC |
607 | |
608 | /* The conversion descriptors will be opened lazily. */ | |
609 | entry->input_cd = (iconv_t) -1; | |
610 | entry->output_cd = (iconv_t) -1; | |
611 | ||
889975e5 | 612 | entry->ilseq_handler = scm_i_get_conversion_strategy (SCM_BOOL_F); |
5f16b897 | 613 | |
5dbc6c06 HWN |
614 | SCM_SET_CELL_TYPE (z, tag); |
615 | SCM_SETPTAB_ENTRY (z, entry); | |
840ae05d | 616 | |
5dbc6c06 | 617 | scm_hashq_set_x (scm_i_port_weak_hash, z, SCM_BOOL_F); |
651a0735 LC |
618 | |
619 | /* For each new port, register a finalizer so that it port type's free | |
620 | function can be invoked eventually. */ | |
621 | register_finalizer_for_port (z); | |
622 | ||
da220f27 | 623 | return z; |
0f2d19dd | 624 | } |
c6c79933 | 625 | #undef FUNC_NAME |
0f2d19dd | 626 | |
67329a9e HWN |
627 | #if SCM_ENABLE_DEPRECATED==1 |
628 | SCM_API scm_t_port * | |
629 | scm_add_to_port_table (SCM port) | |
630 | { | |
631 | SCM z = scm_new_port_table_entry (scm_tc7_port); | |
632 | scm_t_port * pt = SCM_PTAB_ENTRY(z); | |
633 | ||
634 | pt->port = port; | |
5dbc6c06 HWN |
635 | SCM_SETCAR (z, SCM_EOL); |
636 | SCM_SETCDR (z, SCM_EOL); | |
85835e59 | 637 | SCM_SETPTAB_ENTRY (port, pt); |
67329a9e HWN |
638 | return pt; |
639 | } | |
640 | #endif | |
641 | ||
642 | ||
6c951427 | 643 | /* Remove a port from the table and destroy it. */ |
b9ad392e MD |
644 | |
645 | /* This function is not and should not be thread safe. */ | |
0f2d19dd | 646 | void |
5dbc6c06 HWN |
647 | scm_i_remove_port (SCM port) |
648 | #define FUNC_NAME "scm_remove_port" | |
0f2d19dd | 649 | { |
92c2555f | 650 | scm_t_port *p = SCM_PTAB_ENTRY (port); |
682d78d0 LC |
651 | |
652 | scm_port_non_buffer (p); | |
653 | ||
654 | p->putback_buf = NULL; | |
655 | p->putback_buf_size = 0; | |
5dbc6c06 | 656 | |
0f2d19dd | 657 | SCM_SETPTAB_ENTRY (port, 0); |
5dbc6c06 | 658 | scm_hashq_remove_x (scm_i_port_weak_hash, port); |
0f2d19dd | 659 | } |
db4b4ca6 DH |
660 | #undef FUNC_NAME |
661 | ||
0f2d19dd | 662 | |
b450f070 | 663 | /* Functions for debugging. */ |
5dbc6c06 | 664 | #ifdef GUILE_DEBUG |
3b3b36dd | 665 | SCM_DEFINE (scm_pt_size, "pt-size", 0, 0, 0, |
b450f070 | 666 | (), |
1e6808ea | 667 | "Return the number of ports in the port table. @code{pt-size}\n" |
5352393c | 668 | "is only included in @code{--enable-guile-debug} builds.") |
1bbd0b84 | 669 | #define FUNC_NAME s_scm_pt_size |
0f2d19dd | 670 | { |
5dbc6c06 | 671 | return scm_from_int (SCM_HASHTABLE_N_ITEMS (scm_i_port_weak_hash)); |
0f2d19dd | 672 | } |
1bbd0b84 | 673 | #undef FUNC_NAME |
0f2d19dd JB |
674 | #endif |
675 | ||
70df8af6 | 676 | void |
92c2555f | 677 | scm_port_non_buffer (scm_t_port *pt) |
70df8af6 GH |
678 | { |
679 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; | |
680 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
681 | pt->read_buf_size = pt->write_buf_size = 1; | |
682 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
683 | } | |
0f2d19dd | 684 | |
d68fee48 JB |
685 | \f |
686 | /* Revealed counts --- an oddity inherited from SCSH. */ | |
687 | ||
8b13c6b3 GH |
688 | /* Find a port in the table and return its revealed count. |
689 | Also used by the garbage collector. | |
0f2d19dd | 690 | */ |
1cc91f1b | 691 | |
0f2d19dd | 692 | int |
a284e297 | 693 | scm_revealed_count (SCM port) |
0f2d19dd JB |
694 | { |
695 | return SCM_REVEALED(port); | |
696 | } | |
697 | ||
698 | ||
699 | ||
700 | /* Return the revealed count for a port. */ | |
701 | ||
3b3b36dd | 702 | SCM_DEFINE (scm_port_revealed, "port-revealed", 1, 0, 0, |
1bbd0b84 | 703 | (SCM port), |
1e6808ea | 704 | "Return the revealed count for @var{port}.") |
1bbd0b84 | 705 | #define FUNC_NAME s_scm_port_revealed |
0f2d19dd | 706 | { |
78446828 | 707 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 708 | SCM_VALIDATE_OPENPORT (1, port); |
e11e83f3 | 709 | return scm_from_int (scm_revealed_count (port)); |
0f2d19dd | 710 | } |
1bbd0b84 | 711 | #undef FUNC_NAME |
0f2d19dd JB |
712 | |
713 | /* Set the revealed count for a port. */ | |
3b3b36dd | 714 | SCM_DEFINE (scm_set_port_revealed_x, "set-port-revealed!", 2, 0, 0, |
1bbd0b84 | 715 | (SCM port, SCM rcount), |
b450f070 | 716 | "Sets the revealed count for a port to a given value.\n" |
b380b885 | 717 | "The return value is unspecified.") |
1bbd0b84 | 718 | #define FUNC_NAME s_scm_set_port_revealed_x |
0f2d19dd | 719 | { |
78446828 | 720 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 721 | SCM_VALIDATE_OPENPORT (1, port); |
a55c2b68 | 722 | SCM_REVEALED (port) = scm_to_int (rcount); |
8b13c6b3 | 723 | return SCM_UNSPECIFIED; |
0f2d19dd | 724 | } |
1bbd0b84 | 725 | #undef FUNC_NAME |
0f2d19dd | 726 | |
d68fee48 JB |
727 | |
728 | \f | |
729 | /* Retrieving a port's mode. */ | |
730 | ||
eadd48de GH |
731 | /* Return the flags that characterize a port based on the mode |
732 | * string used to open a file for that port. | |
733 | * | |
734 | * See PORT FLAGS in scm.h | |
735 | */ | |
736 | ||
3a5fb14d | 737 | static long |
889975e5 | 738 | scm_i_mode_bits_n (SCM modes) |
3a5fb14d MV |
739 | { |
740 | return (SCM_OPN | |
889975e5 MG |
741 | | (scm_i_string_contains_char (modes, 'r') |
742 | || scm_i_string_contains_char (modes, '+') ? SCM_RDNG : 0) | |
743 | | (scm_i_string_contains_char (modes, 'w') | |
744 | || scm_i_string_contains_char (modes, 'a') | |
745 | || scm_i_string_contains_char (modes, '+') ? SCM_WRTNG : 0) | |
746 | | (scm_i_string_contains_char (modes, '0') ? SCM_BUF0 : 0) | |
747 | | (scm_i_string_contains_char (modes, 'l') ? SCM_BUFLINE : 0)); | |
3a5fb14d MV |
748 | } |
749 | ||
eadd48de | 750 | long |
a284e297 | 751 | scm_mode_bits (char *modes) |
eadd48de | 752 | { |
889975e5 | 753 | return scm_i_mode_bits (scm_from_locale_string (modes)); |
eadd48de GH |
754 | } |
755 | ||
d617ee18 MV |
756 | long |
757 | scm_i_mode_bits (SCM modes) | |
758 | { | |
759 | long bits; | |
760 | ||
761 | if (!scm_is_string (modes)) | |
762 | scm_wrong_type_arg_msg (NULL, 0, modes, "string"); | |
763 | ||
889975e5 | 764 | bits = scm_i_mode_bits_n (modes); |
d617ee18 MV |
765 | scm_remember_upto_here_1 (modes); |
766 | return bits; | |
767 | } | |
eadd48de GH |
768 | |
769 | /* Return the mode flags from an open port. | |
770 | * Some modes such as "append" are only used when opening | |
771 | * a file and are not returned here. */ | |
772 | ||
3b3b36dd | 773 | SCM_DEFINE (scm_port_mode, "port-mode", 1, 0, 0, |
1bbd0b84 | 774 | (SCM port), |
1e6808ea MG |
775 | "Return the port modes associated with the open port @var{port}.\n" |
776 | "These will not necessarily be identical to the modes used when\n" | |
777 | "the port was opened, since modes such as \"append\" which are\n" | |
778 | "used only during port creation are not retained.") | |
1bbd0b84 | 779 | #define FUNC_NAME s_scm_port_mode |
eadd48de | 780 | { |
26a3038d | 781 | char modes[4]; |
eadd48de | 782 | modes[0] = '\0'; |
78446828 MV |
783 | |
784 | port = SCM_COERCE_OUTPORT (port); | |
34d19ef6 | 785 | SCM_VALIDATE_OPPORT (1, port); |
f9a64404 DH |
786 | if (SCM_CELL_WORD_0 (port) & SCM_RDNG) { |
787 | if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) | |
eadd48de GH |
788 | strcpy (modes, "r+"); |
789 | else | |
790 | strcpy (modes, "r"); | |
791 | } | |
f9a64404 | 792 | else if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) |
eadd48de | 793 | strcpy (modes, "w"); |
f9a64404 | 794 | if (SCM_CELL_WORD_0 (port) & SCM_BUF0) |
eadd48de | 795 | strcat (modes, "0"); |
3a5fb14d | 796 | return scm_from_locale_string (modes); |
eadd48de | 797 | } |
1bbd0b84 | 798 | #undef FUNC_NAME |
eadd48de GH |
799 | |
800 | ||
d68fee48 JB |
801 | \f |
802 | /* Closing ports. */ | |
803 | ||
0f2d19dd JB |
804 | /* scm_close_port |
805 | * Call the close operation on a port object. | |
eadd48de | 806 | * see also scm_close. |
0f2d19dd | 807 | */ |
3b3b36dd | 808 | SCM_DEFINE (scm_close_port, "close-port", 1, 0, 0, |
1bbd0b84 | 809 | (SCM port), |
1e6808ea MG |
810 | "Close the specified port object. Return @code{#t} if it\n" |
811 | "successfully closes a port or @code{#f} if it was already\n" | |
812 | "closed. An exception may be raised if an error occurs, for\n" | |
813 | "example when flushing buffered output. See also @ref{Ports and\n" | |
814 | "File Descriptors, close}, for a procedure which can close file\n" | |
815 | "descriptors.") | |
1bbd0b84 | 816 | #define FUNC_NAME s_scm_close_port |
0f2d19dd | 817 | { |
1be6b49c | 818 | size_t i; |
eadd48de GH |
819 | int rv; |
820 | ||
78446828 MV |
821 | port = SCM_COERCE_OUTPORT (port); |
822 | ||
7a754ca6 | 823 | SCM_VALIDATE_PORT (1, port); |
0f2d19dd | 824 | if (SCM_CLOSEDP (port)) |
eadd48de | 825 | return SCM_BOOL_F; |
0f2d19dd | 826 | i = SCM_PTOBNUM (port); |
affc96b5 GH |
827 | if (scm_ptobs[i].close) |
828 | rv = (scm_ptobs[i].close) (port); | |
eadd48de GH |
829 | else |
830 | rv = 0; | |
9de87eea | 831 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
5dbc6c06 | 832 | scm_i_remove_port (port); |
9de87eea | 833 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
22a52da1 | 834 | SCM_CLR_PORT_OPEN_FLAG (port); |
7888309b | 835 | return scm_from_bool (rv >= 0); |
7a754ca6 MD |
836 | } |
837 | #undef FUNC_NAME | |
838 | ||
839 | SCM_DEFINE (scm_close_input_port, "close-input-port", 1, 0, 0, | |
840 | (SCM port), | |
841 | "Close the specified input 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_input_port | |
847 | { | |
848 | SCM_VALIDATE_INPUT_PORT (1, port); | |
849 | scm_close_port (port); | |
850 | return SCM_UNSPECIFIED; | |
851 | } | |
852 | #undef FUNC_NAME | |
853 | ||
854 | SCM_DEFINE (scm_close_output_port, "close-output-port", 1, 0, 0, | |
855 | (SCM port), | |
856 | "Close the specified output port object. The routine has no effect if\n" | |
857 | "the file has already been closed. An exception may be raised if an\n" | |
858 | "error occurs. The value returned is unspecified.\n\n" | |
859 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
860 | "which can close file descriptors.") | |
861 | #define FUNC_NAME s_scm_close_output_port | |
862 | { | |
863 | port = SCM_COERCE_OUTPORT (port); | |
864 | SCM_VALIDATE_OUTPUT_PORT (1, port); | |
865 | scm_close_port (port); | |
866 | return SCM_UNSPECIFIED; | |
0f2d19dd | 867 | } |
1bbd0b84 | 868 | #undef FUNC_NAME |
0f2d19dd | 869 | |
5dbc6c06 HWN |
870 | static SCM |
871 | scm_i_collect_keys_in_vector (void *closure, SCM key, SCM value, SCM result) | |
872 | { | |
873 | int *i = (int*) closure; | |
874 | scm_c_vector_set_x (result, *i, key); | |
875 | (*i)++; | |
876 | ||
877 | return result; | |
878 | } | |
879 | ||
c536b4b3 MV |
880 | void |
881 | scm_c_port_for_each (void (*proc)(void *data, SCM p), void *data) | |
c2ca4493 | 882 | { |
5dbc6c06 | 883 | int i = 0; |
3a5fb14d | 884 | size_t n; |
fdfe6305 MV |
885 | SCM ports; |
886 | ||
fdfe6305 MV |
887 | /* Even without pre-emptive multithreading, running arbitrary code |
888 | while scanning the port table is unsafe because the port table | |
3a5fb14d MV |
889 | can change arbitrarily (from a GC, for example). So we first |
890 | collect the ports into a vector. -mvo */ | |
fdfe6305 | 891 | |
9de87eea | 892 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
5dbc6c06 | 893 | n = SCM_HASHTABLE_N_ITEMS (scm_i_port_weak_hash); |
9de87eea | 894 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
4057a3e0 | 895 | ports = scm_c_make_vector (n, SCM_BOOL_F); |
3a5fb14d | 896 | |
5dbc6c06 HWN |
897 | scm_i_pthread_mutex_lock (&scm_i_port_table_mutex); |
898 | ports = scm_internal_hash_fold (scm_i_collect_keys_in_vector, &i, | |
899 | ports, scm_i_port_weak_hash); | |
9de87eea | 900 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
3a5fb14d | 901 | |
5dbc6c06 HWN |
902 | for (i = 0; i < n; i++) { |
903 | SCM p = SCM_SIMPLE_VECTOR_REF (ports, i); | |
904 | if (SCM_PORTP (p)) | |
905 | proc (data, p); | |
906 | } | |
bd83658e RB |
907 | |
908 | scm_remember_upto_here_1 (ports); | |
c536b4b3 | 909 | } |
fdfe6305 | 910 | |
c536b4b3 MV |
911 | SCM_DEFINE (scm_port_for_each, "port-for-each", 1, 0, 0, |
912 | (SCM proc), | |
913 | "Apply @var{proc} to each port in the Guile port table\n" | |
914 | "in turn. The return value is unspecified. More specifically,\n" | |
915 | "@var{proc} is applied exactly once to every port that exists\n" | |
916 | "in the system at the time @var{port-for-each} is invoked.\n" | |
917 | "Changes to the port table while @var{port-for-each} is running\n" | |
918 | "have no effect as far as @var{port-for-each} is concerned.") | |
919 | #define FUNC_NAME s_scm_port_for_each | |
920 | { | |
921 | SCM_VALIDATE_PROC (1, proc); | |
922 | ||
923 | scm_c_port_for_each ((void (*)(void*,SCM))scm_call_1, proc); | |
c2ca4493 GH |
924 | return SCM_UNSPECIFIED; |
925 | } | |
926 | #undef FUNC_NAME | |
927 | ||
c536b4b3 | 928 | |
d68fee48 JB |
929 | \f |
930 | /* Utter miscellany. Gosh, we should clean this up some time. */ | |
931 | ||
3b3b36dd | 932 | SCM_DEFINE (scm_input_port_p, "input-port?", 1, 0, 0, |
1bbd0b84 | 933 | (SCM x), |
1e6808ea MG |
934 | "Return @code{#t} if @var{x} is an input port, otherwise return\n" |
935 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
936 | "@code{port?}.") | |
1bbd0b84 | 937 | #define FUNC_NAME s_scm_input_port_p |
0f2d19dd | 938 | { |
7888309b | 939 | return scm_from_bool (SCM_INPUT_PORT_P (x)); |
0f2d19dd | 940 | } |
1bbd0b84 | 941 | #undef FUNC_NAME |
0f2d19dd | 942 | |
3b3b36dd | 943 | SCM_DEFINE (scm_output_port_p, "output-port?", 1, 0, 0, |
1bbd0b84 | 944 | (SCM x), |
1e6808ea MG |
945 | "Return @code{#t} if @var{x} is an output port, otherwise return\n" |
946 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
947 | "@code{port?}.") | |
1bbd0b84 | 948 | #define FUNC_NAME s_scm_output_port_p |
0f2d19dd | 949 | { |
82893676 | 950 | x = SCM_COERCE_OUTPORT (x); |
7888309b | 951 | return scm_from_bool (SCM_OUTPUT_PORT_P (x)); |
0f2d19dd | 952 | } |
1bbd0b84 | 953 | #undef FUNC_NAME |
0f2d19dd | 954 | |
eb5c0a2a GH |
955 | SCM_DEFINE (scm_port_p, "port?", 1, 0, 0, |
956 | (SCM x), | |
1e6808ea | 957 | "Return a boolean indicating whether @var{x} is a port.\n" |
5352393c MG |
958 | "Equivalent to @code{(or (input-port? @var{x}) (output-port?\n" |
959 | "@var{x}))}.") | |
eb5c0a2a GH |
960 | #define FUNC_NAME s_scm_port_p |
961 | { | |
7888309b | 962 | return scm_from_bool (SCM_PORTP (x)); |
eb5c0a2a GH |
963 | } |
964 | #undef FUNC_NAME | |
965 | ||
3b3b36dd | 966 | SCM_DEFINE (scm_port_closed_p, "port-closed?", 1, 0, 0, |
1bbd0b84 | 967 | (SCM port), |
1e6808ea MG |
968 | "Return @code{#t} if @var{port} is closed or @code{#f} if it is\n" |
969 | "open.") | |
1bbd0b84 | 970 | #define FUNC_NAME s_scm_port_closed_p |
60d0643d | 971 | { |
34d19ef6 | 972 | SCM_VALIDATE_PORT (1, port); |
7888309b | 973 | return scm_from_bool (!SCM_OPPORTP (port)); |
60d0643d | 974 | } |
1bbd0b84 | 975 | #undef FUNC_NAME |
0f2d19dd | 976 | |
3b3b36dd | 977 | SCM_DEFINE (scm_eof_object_p, "eof-object?", 1, 0, 0, |
1bbd0b84 | 978 | (SCM x), |
1e6808ea MG |
979 | "Return @code{#t} if @var{x} is an end-of-file object; otherwise\n" |
980 | "return @code{#f}.") | |
1bbd0b84 | 981 | #define FUNC_NAME s_scm_eof_object_p |
0f2d19dd | 982 | { |
7888309b | 983 | return scm_from_bool(SCM_EOF_OBJECT_P (x)); |
0f2d19dd | 984 | } |
1bbd0b84 | 985 | #undef FUNC_NAME |
0f2d19dd | 986 | |
3b3b36dd | 987 | SCM_DEFINE (scm_force_output, "force-output", 0, 1, 0, |
1bbd0b84 | 988 | (SCM port), |
b380b885 | 989 | "Flush the specified output port, or the current output port if @var{port}\n" |
9401323e | 990 | "is omitted. The current output buffer contents are passed to the\n" |
b380b885 MD |
991 | "underlying port implementation (e.g., in the case of fports, the\n" |
992 | "data will be written to the file and the output buffer will be cleared.)\n" | |
993 | "It has no effect on an unbuffered port.\n\n" | |
994 | "The return value is unspecified.") | |
1bbd0b84 | 995 | #define FUNC_NAME s_scm_force_output |
0f2d19dd JB |
996 | { |
997 | if (SCM_UNBNDP (port)) | |
9de87eea | 998 | port = scm_current_output_port (); |
0f2d19dd | 999 | else |
78446828 MV |
1000 | { |
1001 | port = SCM_COERCE_OUTPORT (port); | |
34d19ef6 | 1002 | SCM_VALIDATE_OPOUTPORT (1, port); |
78446828 | 1003 | } |
affc96b5 | 1004 | scm_flush (port); |
ee149d03 | 1005 | return SCM_UNSPECIFIED; |
0f2d19dd | 1006 | } |
1bbd0b84 | 1007 | #undef FUNC_NAME |
0f2d19dd | 1008 | |
5dbc6c06 HWN |
1009 | |
1010 | static void | |
61d3568b | 1011 | flush_output_port (void *closure, SCM port) |
5dbc6c06 | 1012 | { |
5dbc6c06 HWN |
1013 | if (SCM_OPOUTPORTP (port)) |
1014 | scm_flush (port); | |
1015 | } | |
1016 | ||
a1ec6916 | 1017 | SCM_DEFINE (scm_flush_all_ports, "flush-all-ports", 0, 0, 0, |
1bbd0b84 | 1018 | (), |
b380b885 MD |
1019 | "Equivalent to calling @code{force-output} on\n" |
1020 | "all open output ports. The return value is unspecified.") | |
1bbd0b84 | 1021 | #define FUNC_NAME s_scm_flush_all_ports |
89ea5b7c | 1022 | { |
5dbc6c06 | 1023 | scm_c_port_for_each (&flush_output_port, NULL); |
89ea5b7c GH |
1024 | return SCM_UNSPECIFIED; |
1025 | } | |
1bbd0b84 | 1026 | #undef FUNC_NAME |
0f2d19dd | 1027 | |
3b3b36dd | 1028 | SCM_DEFINE (scm_read_char, "read-char", 0, 1, 0, |
1bbd0b84 | 1029 | (SCM port), |
1e6808ea MG |
1030 | "Return the next character available from @var{port}, updating\n" |
1031 | "@var{port} to point to the following character. If no more\n" | |
1032 | "characters are available, the end-of-file object is returned.") | |
1bbd0b84 | 1033 | #define FUNC_NAME s_scm_read_char |
0f2d19dd | 1034 | { |
889975e5 | 1035 | scm_t_wchar c; |
0f2d19dd | 1036 | if (SCM_UNBNDP (port)) |
9de87eea | 1037 | port = scm_current_input_port (); |
34d19ef6 | 1038 | SCM_VALIDATE_OPINPORT (1, port); |
b7f3516f | 1039 | c = scm_getc (port); |
0f2d19dd JB |
1040 | if (EOF == c) |
1041 | return SCM_EOF_VAL; | |
7866a09b | 1042 | return SCM_MAKE_CHAR (c); |
0f2d19dd | 1043 | } |
1bbd0b84 | 1044 | #undef FUNC_NAME |
0f2d19dd | 1045 | |
f4bc4e59 LC |
1046 | /* Update the line and column number of PORT after consumption of C. */ |
1047 | static inline void | |
1048 | update_port_lf (scm_t_wchar c, SCM port) | |
1049 | { | |
1050 | switch (c) | |
1051 | { | |
1052 | case '\a': | |
1053 | break; | |
1054 | case '\b': | |
1055 | SCM_DECCOL (port); | |
1056 | break; | |
1057 | case '\n': | |
1058 | SCM_INCLINE (port); | |
1059 | break; | |
1060 | case '\r': | |
1061 | SCM_ZEROCOL (port); | |
1062 | break; | |
1063 | case '\t': | |
1064 | SCM_TABCOL (port); | |
1065 | break; | |
1066 | default: | |
1067 | SCM_INCCOL (port); | |
1068 | break; | |
1069 | } | |
1070 | } | |
1071 | ||
889975e5 MG |
1072 | #define SCM_MBCHAR_BUF_SIZE (4) |
1073 | ||
f4bc4e59 LC |
1074 | /* Convert the SIZE-byte UTF-8 sequence in UTF8_BUF to a codepoint. |
1075 | UTF8_BUF is assumed to contain a valid UTF-8 sequence. */ | |
1076 | static scm_t_wchar | |
1077 | utf8_to_codepoint (const scm_t_uint8 *utf8_buf, size_t size) | |
1078 | { | |
1079 | scm_t_wchar codepoint; | |
1080 | ||
1081 | if (utf8_buf[0] <= 0x7f) | |
1082 | { | |
1083 | assert (size == 1); | |
1084 | codepoint = utf8_buf[0]; | |
1085 | } | |
1086 | else if ((utf8_buf[0] & 0xe0) == 0xc0) | |
1087 | { | |
1088 | assert (size == 2); | |
1089 | codepoint = ((scm_t_wchar) utf8_buf[0] & 0x1f) << 6UL | |
1090 | | (utf8_buf[1] & 0x3f); | |
1091 | } | |
1092 | else if ((utf8_buf[0] & 0xf0) == 0xe0) | |
1093 | { | |
1094 | assert (size == 3); | |
1095 | codepoint = ((scm_t_wchar) utf8_buf[0] & 0x0f) << 12UL | |
1096 | | ((scm_t_wchar) utf8_buf[1] & 0x3f) << 6UL | |
1097 | | (utf8_buf[2] & 0x3f); | |
1098 | } | |
1099 | else | |
1100 | { | |
1101 | assert (size == 4); | |
1102 | codepoint = ((scm_t_wchar) utf8_buf[0] & 0x07) << 18UL | |
1103 | | ((scm_t_wchar) utf8_buf[1] & 0x3f) << 12UL | |
1104 | | ((scm_t_wchar) utf8_buf[2] & 0x3f) << 6UL | |
1105 | | (utf8_buf[3] & 0x3f); | |
1106 | } | |
1107 | ||
1108 | return codepoint; | |
1109 | } | |
1110 | ||
fd5eec2b LC |
1111 | /* Read a codepoint from PORT and return it. Fill BUF with the byte |
1112 | representation of the codepoint in PORT's encoding, and set *LEN to | |
1113 | the length in bytes of that representation. Raise an error on | |
1114 | failure. */ | |
1115 | static scm_t_wchar | |
1116 | get_codepoint (SCM port, char buf[SCM_MBCHAR_BUF_SIZE], size_t *len) | |
889975e5 | 1117 | { |
f4bc4e59 LC |
1118 | int err, byte_read; |
1119 | size_t bytes_consumed, output_size; | |
1120 | scm_t_wchar codepoint; | |
1121 | char *output; | |
1122 | scm_t_uint8 utf8_buf[SCM_MBCHAR_BUF_SIZE]; | |
889975e5 MG |
1123 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1124 | ||
f4bc4e59 LC |
1125 | if (SCM_UNLIKELY (pt->input_cd == (iconv_t) -1)) |
1126 | /* Initialize the conversion descriptors. */ | |
1127 | scm_i_set_port_encoding_x (port, pt->encoding); | |
889975e5 | 1128 | |
f4bc4e59 LC |
1129 | for (output_size = 0, output = (char *) utf8_buf, |
1130 | bytes_consumed = 0, err = 0; | |
1131 | err == 0 && output_size == 0 | |
1132 | && (bytes_consumed == 0 || byte_read != EOF); | |
1133 | bytes_consumed++) | |
63479112 | 1134 | { |
f4bc4e59 LC |
1135 | char *input; |
1136 | size_t input_left, output_left, done; | |
889975e5 | 1137 | |
f4bc4e59 LC |
1138 | byte_read = scm_get_byte_or_eof (port); |
1139 | if (byte_read == EOF) | |
889975e5 | 1140 | { |
f4bc4e59 LC |
1141 | if (bytes_consumed == 0) |
1142 | return (scm_t_wchar) EOF; | |
1143 | else | |
1144 | continue; | |
889975e5 MG |
1145 | } |
1146 | ||
f4bc4e59 | 1147 | buf[bytes_consumed] = byte_read; |
889975e5 | 1148 | |
f4bc4e59 LC |
1149 | input = buf; |
1150 | input_left = bytes_consumed + 1; | |
1151 | output_left = sizeof (utf8_buf); | |
889975e5 | 1152 | |
f4bc4e59 LC |
1153 | done = iconv (pt->input_cd, &input, &input_left, |
1154 | &output, &output_left); | |
1155 | if (done == (size_t) -1) | |
889975e5 | 1156 | { |
f4bc4e59 LC |
1157 | err = errno; |
1158 | if (err == EINVAL) | |
1159 | /* Missing input: keep trying. */ | |
1160 | err = 0; | |
889975e5 | 1161 | } |
f4bc4e59 LC |
1162 | else |
1163 | output_size = sizeof (utf8_buf) - output_left; | |
889975e5 MG |
1164 | } |
1165 | ||
f4bc4e59 LC |
1166 | if (err != 0) |
1167 | goto failure; | |
1168 | ||
1169 | /* Convert the UTF8_BUF sequence to a Unicode code point. */ | |
1170 | codepoint = utf8_to_codepoint (utf8_buf, output_size); | |
1171 | update_port_lf (codepoint, port); | |
889975e5 | 1172 | |
f4bc4e59 | 1173 | *len = bytes_consumed; |
fd5eec2b | 1174 | |
889975e5 MG |
1175 | return codepoint; |
1176 | ||
1177 | failure: | |
1178 | { | |
1179 | char *err_buf; | |
f4bc4e59 LC |
1180 | SCM err_str = scm_i_make_string (bytes_consumed, &err_buf); |
1181 | memcpy (err_buf, buf, bytes_consumed); | |
889975e5 | 1182 | |
f4bc4e59 | 1183 | if (err == EILSEQ) |
889975e5 MG |
1184 | scm_misc_error (NULL, "input encoding error for ~s: ~s", |
1185 | scm_list_2 (scm_from_locale_string (scm_i_get_port_encoding (port)), | |
1186 | err_str)); | |
1187 | else | |
1188 | scm_misc_error (NULL, "input encoding error (invalid) for ~s: ~s\n", | |
1189 | scm_list_2 (scm_from_locale_string (scm_i_get_port_encoding (port)), | |
1190 | err_str)); | |
1191 | } | |
1192 | ||
1193 | /* Never gets here. */ | |
1194 | return 0; | |
1195 | } | |
1196 | ||
fd5eec2b LC |
1197 | /* Read a codepoint from PORT and return it. */ |
1198 | scm_t_wchar | |
1199 | scm_getc (SCM port) | |
1200 | { | |
1201 | size_t len; | |
1202 | char buf[SCM_MBCHAR_BUF_SIZE]; | |
1203 | ||
1204 | return get_codepoint (port, buf, &len); | |
1205 | } | |
889975e5 | 1206 | |
5c070ca7 | 1207 | /* this should only be called when the read buffer is empty. it |
affc96b5 | 1208 | tries to refill the read buffer. it returns the first char from |
5c070ca7 | 1209 | the port, which is either EOF or *(pt->read_pos). */ |
6c951427 | 1210 | int |
affc96b5 | 1211 | scm_fill_input (SCM port) |
6c951427 | 1212 | { |
92c2555f | 1213 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e | 1214 | |
b5cb4464 NJ |
1215 | assert (pt->read_pos == pt->read_end); |
1216 | ||
6c951427 GH |
1217 | if (pt->read_buf == pt->putback_buf) |
1218 | { | |
1219 | /* finished reading put-back chars. */ | |
1220 | pt->read_buf = pt->saved_read_buf; | |
1221 | pt->read_pos = pt->saved_read_pos; | |
1222 | pt->read_end = pt->saved_read_end; | |
1223 | pt->read_buf_size = pt->saved_read_buf_size; | |
1224 | if (pt->read_pos < pt->read_end) | |
5c070ca7 | 1225 | return *(pt->read_pos); |
6c951427 | 1226 | } |
affc96b5 | 1227 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
6c951427 GH |
1228 | } |
1229 | ||
3cb988bd | 1230 | |
6fe692e9 MD |
1231 | /* scm_lfwrite |
1232 | * | |
53802ea8 MV |
1233 | * This function differs from scm_c_write; it updates port line and |
1234 | * column. */ | |
6fe692e9 | 1235 | |
9c44cd45 | 1236 | void |
1be6b49c | 1237 | scm_lfwrite (const char *ptr, size_t size, SCM port) |
ee149d03 | 1238 | { |
92c2555f MV |
1239 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1240 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
3e2043c4 | 1241 | |
840ae05d | 1242 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1243 | scm_end_input (port); |
283a1a0e | 1244 | |
31703ab8 | 1245 | ptob->write (port, ptr, size); |
840ae05d | 1246 | |
9c44cd45 MG |
1247 | for (; size; ptr++, size--) |
1248 | update_port_lf ((scm_t_wchar) (unsigned char) *ptr, port); | |
1249 | ||
1250 | if (pt->rw_random) | |
1251 | pt->rw_active = SCM_PORT_WRITE; | |
1252 | } | |
1253 | ||
4325620f | 1254 | /* Write STR to PORT from START inclusive to END exclusive. */ |
9c44cd45 MG |
1255 | void |
1256 | scm_lfwrite_substr (SCM str, size_t start, size_t end, SCM port) | |
1257 | { | |
9c44cd45 | 1258 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
9c44cd45 MG |
1259 | |
1260 | if (pt->rw_active == SCM_PORT_READ) | |
1261 | scm_end_input (port); | |
1262 | ||
4325620f LC |
1263 | if (end == (size_t) -1) |
1264 | end = scm_i_string_length (str); | |
9c44cd45 | 1265 | |
4325620f | 1266 | scm_display (scm_c_substring (str, start, end), port); |
53802ea8 | 1267 | |
840ae05d JB |
1268 | if (pt->rw_random) |
1269 | pt->rw_active = SCM_PORT_WRITE; | |
ee149d03 | 1270 | } |
3cb988bd | 1271 | |
6fe692e9 MD |
1272 | /* scm_c_read |
1273 | * | |
1274 | * Used by an application to read arbitrary number of bytes from an | |
1275 | * SCM port. Same semantics as libc read, except that scm_c_read only | |
1276 | * returns less than SIZE bytes if at end-of-file. | |
1277 | * | |
1278 | * Warning: Doesn't update port line and column counts! */ | |
1279 | ||
b5cb4464 NJ |
1280 | /* This structure, and the following swap_buffer function, are used |
1281 | for temporarily swapping a port's own read buffer, and the buffer | |
1282 | that the caller of scm_c_read provides. */ | |
1283 | struct port_and_swap_buffer | |
1284 | { | |
1285 | scm_t_port *pt; | |
1286 | unsigned char *buffer; | |
1287 | size_t size; | |
1288 | }; | |
1289 | ||
1290 | static void | |
1291 | swap_buffer (void *data) | |
1292 | { | |
1293 | struct port_and_swap_buffer *psb = (struct port_and_swap_buffer *) data; | |
1294 | unsigned char *old_buf = psb->pt->read_buf; | |
1295 | size_t old_size = psb->pt->read_buf_size; | |
1296 | ||
1297 | /* Make the port use (buffer, size) from the struct. */ | |
1298 | psb->pt->read_pos = psb->pt->read_buf = psb->pt->read_end = psb->buffer; | |
1299 | psb->pt->read_buf_size = psb->size; | |
1300 | ||
1301 | /* Save the port's old (buffer, size) in the struct. */ | |
1302 | psb->buffer = old_buf; | |
1303 | psb->size = old_size; | |
1304 | } | |
1305 | ||
1be6b49c ML |
1306 | size_t |
1307 | scm_c_read (SCM port, void *buffer, size_t size) | |
693758d5 | 1308 | #define FUNC_NAME "scm_c_read" |
6fe692e9 | 1309 | { |
693758d5 | 1310 | scm_t_port *pt; |
1be6b49c | 1311 | size_t n_read = 0, n_available; |
b5cb4464 | 1312 | struct port_and_swap_buffer psb; |
6fe692e9 | 1313 | |
693758d5 LC |
1314 | SCM_VALIDATE_OPINPORT (1, port); |
1315 | ||
1316 | pt = SCM_PTAB_ENTRY (port); | |
6fe692e9 MD |
1317 | if (pt->rw_active == SCM_PORT_WRITE) |
1318 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
1319 | ||
1320 | if (pt->rw_random) | |
1321 | pt->rw_active = SCM_PORT_READ; | |
1322 | ||
b5cb4464 NJ |
1323 | /* Take bytes first from the port's read buffer. */ |
1324 | if (pt->read_pos < pt->read_end) | |
6fe692e9 | 1325 | { |
b5cb4464 | 1326 | n_available = min (size, pt->read_end - pt->read_pos); |
6fe692e9 | 1327 | memcpy (buffer, pt->read_pos, n_available); |
910d1e40 | 1328 | buffer = (char *) buffer + n_available; |
6fe692e9 MD |
1329 | pt->read_pos += n_available; |
1330 | n_read += n_available; | |
6fe692e9 | 1331 | size -= n_available; |
6fe692e9 MD |
1332 | } |
1333 | ||
b5cb4464 NJ |
1334 | /* Avoid the scm_dynwind_* costs if we now have enough data. */ |
1335 | if (size == 0) | |
1336 | return n_read; | |
1337 | ||
1338 | /* Now we will call scm_fill_input repeatedly until we have read the | |
1339 | requested number of bytes. (Note that a single scm_fill_input | |
1340 | call does not guarantee to fill the whole of the port's read | |
6d227556 | 1341 | buffer.) */ |
75192345 | 1342 | if (pt->read_buf_size <= 1 && pt->encoding == NULL) |
b5cb4464 | 1343 | { |
6d227556 NJ |
1344 | /* The port that we are reading from is unbuffered - i.e. does |
1345 | not have its own persistent buffer - but we have a buffer, | |
1346 | provided by our caller, that is the right size for the data | |
1347 | that is wanted. For the following scm_fill_input calls, | |
1348 | therefore, we use the buffer in hand as the port's read | |
1349 | buffer. | |
1350 | ||
1351 | We need to make sure that the port's normal (1 byte) buffer | |
1352 | is reinstated in case one of the scm_fill_input () calls | |
1353 | throws an exception; we use the scm_dynwind_* API to achieve | |
75192345 MG |
1354 | that. |
1355 | ||
1356 | A consequence of this optimization is that the fill_input | |
1357 | functions can't unget characters. That'll push data to the | |
1358 | pushback buffer instead of this psb buffer. */ | |
1359 | #if SCM_DEBUG == 1 | |
1360 | unsigned char *pback = pt->putback_buf; | |
1361 | #endif | |
6d227556 NJ |
1362 | psb.pt = pt; |
1363 | psb.buffer = buffer; | |
1364 | psb.size = size; | |
1365 | scm_dynwind_begin (SCM_F_DYNWIND_REWINDABLE); | |
1366 | scm_dynwind_rewind_handler (swap_buffer, &psb, SCM_F_WIND_EXPLICITLY); | |
1367 | scm_dynwind_unwind_handler (swap_buffer, &psb, SCM_F_WIND_EXPLICITLY); | |
1368 | ||
1369 | /* Call scm_fill_input until we have all the bytes that we need, | |
1370 | or we hit EOF. */ | |
1371 | while (pt->read_buf_size && (scm_fill_input (port) != EOF)) | |
1372 | { | |
1373 | pt->read_buf_size -= (pt->read_end - pt->read_pos); | |
1374 | pt->read_pos = pt->read_buf = pt->read_end; | |
1375 | } | |
75192345 MG |
1376 | #if SCM_DEBUG == 1 |
1377 | if (pback != pt->putback_buf | |
1378 | || pt->read_buf - (unsigned char *) buffer < 0) | |
1379 | scm_misc_error (FUNC_NAME, | |
1380 | "scm_c_read must not call a fill function that pushes " | |
1381 | "back characters onto an unbuffered port", SCM_EOL); | |
1382 | #endif | |
6d227556 | 1383 | n_read += pt->read_buf - (unsigned char *) buffer; |
75192345 | 1384 | |
6d227556 NJ |
1385 | /* Reinstate the port's normal buffer. */ |
1386 | scm_dynwind_end (); | |
1387 | } | |
1388 | else | |
1389 | { | |
1390 | /* The port has its own buffer. It is important that we use it, | |
1391 | even if it happens to be smaller than our caller's buffer, so | |
1392 | that a custom port implementation's entry points (in | |
1393 | particular, fill_input) can rely on the buffer always being | |
1394 | the same as they first set up. */ | |
1395 | while (size && (scm_fill_input (port) != EOF)) | |
1396 | { | |
1397 | n_available = min (size, pt->read_end - pt->read_pos); | |
1398 | memcpy (buffer, pt->read_pos, n_available); | |
1399 | buffer = (char *) buffer + n_available; | |
1400 | pt->read_pos += n_available; | |
1401 | n_read += n_available; | |
1402 | size -= n_available; | |
1403 | } | |
1404 | } | |
6fe692e9 | 1405 | |
b5cb4464 | 1406 | return n_read; |
6fe692e9 | 1407 | } |
693758d5 | 1408 | #undef FUNC_NAME |
6fe692e9 MD |
1409 | |
1410 | /* scm_c_write | |
1411 | * | |
1412 | * Used by an application to write arbitrary number of bytes to an SCM | |
1413 | * port. Similar semantics as libc write. However, unlike libc | |
1414 | * write, scm_c_write writes the requested number of bytes and has no | |
1415 | * return value. | |
1416 | * | |
1417 | * Warning: Doesn't update port line and column counts! | |
1418 | */ | |
1419 | ||
693758d5 | 1420 | void |
1be6b49c | 1421 | scm_c_write (SCM port, const void *ptr, size_t size) |
693758d5 | 1422 | #define FUNC_NAME "scm_c_write" |
6fe692e9 | 1423 | { |
693758d5 LC |
1424 | scm_t_port *pt; |
1425 | scm_t_ptob_descriptor *ptob; | |
1426 | ||
1427 | SCM_VALIDATE_OPOUTPORT (1, port); | |
1428 | ||
1429 | pt = SCM_PTAB_ENTRY (port); | |
1430 | ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
6fe692e9 MD |
1431 | |
1432 | if (pt->rw_active == SCM_PORT_READ) | |
1433 | scm_end_input (port); | |
1434 | ||
1435 | ptob->write (port, ptr, size); | |
1436 | ||
1437 | if (pt->rw_random) | |
1438 | pt->rw_active = SCM_PORT_WRITE; | |
1439 | } | |
693758d5 | 1440 | #undef FUNC_NAME |
3cb988bd | 1441 | |
fca43887 | 1442 | void |
a284e297 | 1443 | scm_flush (SCM port) |
ee149d03 | 1444 | { |
c014a02e | 1445 | long i = SCM_PTOBNUM (port); |
7f2a6c38 | 1446 | assert (i >= 0); |
affc96b5 | 1447 | (scm_ptobs[i].flush) (port); |
ee149d03 JB |
1448 | } |
1449 | ||
283a1a0e | 1450 | void |
a284e297 | 1451 | scm_end_input (SCM port) |
283a1a0e | 1452 | { |
c014a02e | 1453 | long offset; |
92c2555f | 1454 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e GH |
1455 | |
1456 | if (pt->read_buf == pt->putback_buf) | |
1457 | { | |
1458 | offset = pt->read_end - pt->read_pos; | |
1459 | pt->read_buf = pt->saved_read_buf; | |
1460 | pt->read_pos = pt->saved_read_pos; | |
1461 | pt->read_end = pt->saved_read_end; | |
1462 | pt->read_buf_size = pt->saved_read_buf_size; | |
1463 | } | |
1464 | else | |
1465 | offset = 0; | |
1466 | ||
affc96b5 | 1467 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
283a1a0e GH |
1468 | } |
1469 | ||
ee149d03 JB |
1470 | \f |
1471 | ||
1472 | ||
1473 | void | |
889975e5 MG |
1474 | scm_unget_byte (int c, SCM port) |
1475 | #define FUNC_NAME "scm_unget_byte" | |
ee149d03 | 1476 | { |
92c2555f | 1477 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
840ae05d | 1478 | |
6c951427 GH |
1479 | if (pt->read_buf == pt->putback_buf) |
1480 | /* already using the put-back buffer. */ | |
1481 | { | |
1482 | /* enlarge putback_buf if necessary. */ | |
1483 | if (pt->read_end == pt->read_buf + pt->read_buf_size | |
1484 | && pt->read_buf == pt->read_pos) | |
1485 | { | |
1be6b49c | 1486 | size_t new_size = pt->read_buf_size * 2; |
c6c79933 | 1487 | unsigned char *tmp = (unsigned char *) |
4c9419ac MV |
1488 | scm_gc_realloc (pt->putback_buf, pt->read_buf_size, new_size, |
1489 | "putback buffer"); | |
6c951427 | 1490 | |
6c951427 GH |
1491 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; |
1492 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
1493 | pt->read_buf_size = pt->putback_buf_size = new_size; | |
1494 | } | |
1495 | ||
1496 | /* shift any existing bytes to buffer + 1. */ | |
1497 | if (pt->read_pos == pt->read_end) | |
1498 | pt->read_end = pt->read_buf + 1; | |
1499 | else if (pt->read_pos != pt->read_buf + 1) | |
1500 | { | |
1501 | int count = pt->read_end - pt->read_pos; | |
1502 | ||
1503 | memmove (pt->read_buf + 1, pt->read_pos, count); | |
1504 | pt->read_end = pt->read_buf + 1 + count; | |
1505 | } | |
1506 | ||
1507 | pt->read_pos = pt->read_buf; | |
1508 | } | |
1509 | else | |
1510 | /* switch to the put-back buffer. */ | |
1511 | { | |
1512 | if (pt->putback_buf == NULL) | |
1513 | { | |
c357d546 | 1514 | pt->putback_buf |
92d8fd32 LC |
1515 | = (unsigned char *) scm_gc_malloc_pointerless |
1516 | (SCM_INITIAL_PUTBACK_BUF_SIZE, "putback buffer"); | |
6c951427 GH |
1517 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; |
1518 | } | |
1519 | ||
1520 | pt->saved_read_buf = pt->read_buf; | |
1521 | pt->saved_read_pos = pt->read_pos; | |
1522 | pt->saved_read_end = pt->read_end; | |
1523 | pt->saved_read_buf_size = pt->read_buf_size; | |
1524 | ||
1525 | pt->read_pos = pt->read_buf = pt->putback_buf; | |
1526 | pt->read_end = pt->read_buf + 1; | |
1527 | pt->read_buf_size = pt->putback_buf_size; | |
1528 | } | |
1529 | ||
1530 | *pt->read_buf = c; | |
ee149d03 | 1531 | |
840ae05d JB |
1532 | if (pt->rw_random) |
1533 | pt->rw_active = SCM_PORT_READ; | |
889975e5 MG |
1534 | } |
1535 | #undef FUNC_NAME | |
1536 | ||
63479112 | 1537 | void |
889975e5 MG |
1538 | scm_ungetc (scm_t_wchar c, SCM port) |
1539 | #define FUNC_NAME "scm_ungetc" | |
1540 | { | |
1541 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
63479112 LC |
1542 | char *result; |
1543 | char result_buf[10]; | |
1544 | const char *encoding; | |
889975e5 MG |
1545 | size_t len; |
1546 | int i; | |
1547 | ||
63479112 LC |
1548 | if (pt->encoding != NULL) |
1549 | encoding = pt->encoding; | |
1550 | else | |
1551 | encoding = "ISO-8859-1"; | |
1552 | ||
1553 | len = sizeof (result_buf); | |
1554 | result = u32_conv_to_encoding (encoding, | |
1555 | (enum iconv_ilseq_handler) pt->ilseq_handler, | |
1556 | (uint32_t *) &c, 1, NULL, | |
1557 | result_buf, &len); | |
1558 | ||
1559 | if (SCM_UNLIKELY (result == NULL || len == 0)) | |
1560 | { | |
1561 | SCM chr; | |
1562 | ||
1563 | chr = scm_integer_to_char (scm_from_uint32 (c)); | |
1564 | scm_encoding_error (FUNC_NAME, errno, | |
1565 | "conversion to port encoding failed", | |
1566 | "UTF-32", encoding, | |
1567 | scm_string (scm_list_1 (chr))); | |
1568 | } | |
1569 | ||
889975e5 | 1570 | for (i = len - 1; i >= 0; i--) |
63479112 LC |
1571 | scm_unget_byte (result[i], port); |
1572 | ||
1573 | if (SCM_UNLIKELY (result != result_buf)) | |
1574 | free (result); | |
840ae05d | 1575 | |
ee149d03 JB |
1576 | if (c == '\n') |
1577 | { | |
1578 | /* What should col be in this case? | |
1579 | * We'll leave it at -1. | |
1580 | */ | |
1581 | SCM_LINUM (port) -= 1; | |
1582 | } | |
1583 | else | |
1584 | SCM_COL(port) -= 1; | |
1585 | } | |
c6c79933 | 1586 | #undef FUNC_NAME |
ee149d03 JB |
1587 | |
1588 | ||
1589 | void | |
70d63753 | 1590 | scm_ungets (const char *s, int n, SCM port) |
ee149d03 JB |
1591 | { |
1592 | /* This is simple minded and inefficient, but unreading strings is | |
1593 | * probably not a common operation, and remember that line and | |
1594 | * column numbers have to be handled... | |
1595 | * | |
1596 | * Please feel free to write an optimized version! | |
1597 | */ | |
1598 | while (n--) | |
1599 | scm_ungetc (s[n], port); | |
1600 | } | |
1601 | ||
1602 | ||
3b3b36dd | 1603 | SCM_DEFINE (scm_peek_char, "peek-char", 0, 1, 0, |
1bbd0b84 | 1604 | (SCM port), |
1e6808ea MG |
1605 | "Return the next character available from @var{port},\n" |
1606 | "@emph{without} updating @var{port} to point to the following\n" | |
1607 | "character. If no more characters are available, the\n" | |
c2dfff19 KR |
1608 | "end-of-file object is returned.\n" |
1609 | "\n" | |
1610 | "The value returned by\n" | |
1e6808ea MG |
1611 | "a call to @code{peek-char} is the same as the value that would\n" |
1612 | "have been returned by a call to @code{read-char} on the same\n" | |
1613 | "port. The only difference is that the very next call to\n" | |
1614 | "@code{read-char} or @code{peek-char} on that @var{port} will\n" | |
1615 | "return the value returned by the preceding call to\n" | |
1616 | "@code{peek-char}. In particular, a call to @code{peek-char} on\n" | |
1617 | "an interactive port will hang waiting for input whenever a call\n" | |
c2dfff19 | 1618 | "to @code{read-char} would have hung.") |
1bbd0b84 | 1619 | #define FUNC_NAME s_scm_peek_char |
ee149d03 | 1620 | { |
fd5eec2b LC |
1621 | SCM result; |
1622 | scm_t_wchar c; | |
1623 | char bytes[SCM_MBCHAR_BUF_SIZE]; | |
1624 | long column, line; | |
1625 | size_t len; | |
1626 | ||
ee149d03 | 1627 | if (SCM_UNBNDP (port)) |
9de87eea | 1628 | port = scm_current_input_port (); |
b2456dd4 | 1629 | SCM_VALIDATE_OPINPORT (1, port); |
fd5eec2b LC |
1630 | |
1631 | column = SCM_COL (port); | |
1632 | line = SCM_LINUM (port); | |
1633 | ||
1634 | c = get_codepoint (port, bytes, &len); | |
1635 | if (c == EOF) | |
1636 | result = SCM_EOF_VAL; | |
1637 | else | |
1638 | { | |
1639 | long i; | |
1640 | ||
1641 | result = SCM_MAKE_CHAR (c); | |
1642 | ||
1643 | for (i = len - 1; i >= 0; i--) | |
1644 | scm_unget_byte (bytes[i], port); | |
1645 | ||
1646 | SCM_COL (port) = column; | |
1647 | SCM_LINUM (port) = line; | |
1648 | } | |
1649 | ||
1650 | return result; | |
3cb988bd | 1651 | } |
1bbd0b84 | 1652 | #undef FUNC_NAME |
3cb988bd | 1653 | |
1be4270a | 1654 | SCM_DEFINE (scm_unread_char, "unread-char", 1, 1, 0, |
1bbd0b84 | 1655 | (SCM cobj, SCM port), |
b380b885 MD |
1656 | "Place @var{char} in @var{port} so that it will be read by the\n" |
1657 | "next read operation. If called multiple times, the unread characters\n" | |
1658 | "will be read again in last-in first-out order. If @var{port} is\n" | |
1659 | "not supplied, the current input port is used.") | |
1bbd0b84 | 1660 | #define FUNC_NAME s_scm_unread_char |
0f2d19dd JB |
1661 | { |
1662 | int c; | |
1663 | ||
34d19ef6 | 1664 | SCM_VALIDATE_CHAR (1, cobj); |
0f2d19dd | 1665 | if (SCM_UNBNDP (port)) |
9de87eea | 1666 | port = scm_current_input_port (); |
b2456dd4 | 1667 | SCM_VALIDATE_OPINPORT (2, port); |
0f2d19dd | 1668 | |
7866a09b | 1669 | c = SCM_CHAR (cobj); |
0f2d19dd | 1670 | |
b7f3516f | 1671 | scm_ungetc (c, port); |
0f2d19dd JB |
1672 | return cobj; |
1673 | } | |
1bbd0b84 | 1674 | #undef FUNC_NAME |
0f2d19dd | 1675 | |
a1ec6916 | 1676 | SCM_DEFINE (scm_unread_string, "unread-string", 2, 0, 0, |
1bbd0b84 | 1677 | (SCM str, SCM port), |
b380b885 MD |
1678 | "Place the string @var{str} in @var{port} so that its characters will be\n" |
1679 | "read in subsequent read operations. If called multiple times, the\n" | |
1680 | "unread characters will be read again in last-in first-out order. If\n" | |
1681 | "@var{port} is not supplied, the current-input-port is used.") | |
1bbd0b84 | 1682 | #define FUNC_NAME s_scm_unread_string |
ee1e7e13 | 1683 | { |
889975e5 | 1684 | int n; |
34d19ef6 | 1685 | SCM_VALIDATE_STRING (1, str); |
ee1e7e13 | 1686 | if (SCM_UNBNDP (port)) |
9de87eea | 1687 | port = scm_current_input_port (); |
b2456dd4 | 1688 | SCM_VALIDATE_OPINPORT (2, port); |
ee1e7e13 | 1689 | |
889975e5 MG |
1690 | n = scm_i_string_length (str); |
1691 | ||
1692 | while (n--) | |
1693 | scm_ungetc (scm_i_string_ref (str, n), port); | |
ee1e7e13 MD |
1694 | |
1695 | return str; | |
1696 | } | |
1bbd0b84 | 1697 | #undef FUNC_NAME |
ee1e7e13 | 1698 | |
a1ec6916 | 1699 | SCM_DEFINE (scm_seek, "seek", 3, 0, 0, |
1e6808ea MG |
1700 | (SCM fd_port, SCM offset, SCM whence), |
1701 | "Sets the current position of @var{fd/port} to the integer\n" | |
1702 | "@var{offset}, which is interpreted according to the value of\n" | |
1703 | "@var{whence}.\n" | |
1704 | "\n" | |
1705 | "One of the following variables should be supplied for\n" | |
1706 | "@var{whence}:\n" | |
b380b885 MD |
1707 | "@defvar SEEK_SET\n" |
1708 | "Seek from the beginning of the file.\n" | |
1709 | "@end defvar\n" | |
1710 | "@defvar SEEK_CUR\n" | |
1711 | "Seek from the current position.\n" | |
1712 | "@end defvar\n" | |
1713 | "@defvar SEEK_END\n" | |
1714 | "Seek from the end of the file.\n" | |
1e6808ea MG |
1715 | "@end defvar\n" |
1716 | "If @var{fd/port} is a file descriptor, the underlying system\n" | |
1717 | "call is @code{lseek}. @var{port} may be a string port.\n" | |
1718 | "\n" | |
1719 | "The value returned is the new position in the file. This means\n" | |
1720 | "that the current position of a port can be obtained using:\n" | |
1721 | "@lisp\n" | |
b380b885 | 1722 | "(seek port 0 SEEK_CUR)\n" |
1e6808ea | 1723 | "@end lisp") |
1bbd0b84 | 1724 | #define FUNC_NAME s_scm_seek |
840ae05d | 1725 | { |
840ae05d JB |
1726 | int how; |
1727 | ||
1e6808ea | 1728 | fd_port = SCM_COERCE_OUTPORT (fd_port); |
840ae05d | 1729 | |
a55c2b68 | 1730 | how = scm_to_int (whence); |
840ae05d | 1731 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) |
1bbd0b84 | 1732 | SCM_OUT_OF_RANGE (3, whence); |
23f2b9a3 | 1733 | |
0a94eb00 | 1734 | if (SCM_OPPORTP (fd_port)) |
840ae05d | 1735 | { |
92c2555f | 1736 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (fd_port); |
f1ce9199 LC |
1737 | off_t_or_off64_t off = scm_to_off_t_or_off64_t (offset); |
1738 | off_t_or_off64_t rv; | |
840ae05d JB |
1739 | |
1740 | if (!ptob->seek) | |
1bbd0b84 | 1741 | SCM_MISC_ERROR ("port is not seekable", |
1e6808ea | 1742 | scm_cons (fd_port, SCM_EOL)); |
840ae05d | 1743 | else |
1e6808ea | 1744 | rv = ptob->seek (fd_port, off, how); |
f1ce9199 | 1745 | return scm_from_off_t_or_off64_t (rv); |
840ae05d JB |
1746 | } |
1747 | else /* file descriptor?. */ | |
1748 | { | |
23f2b9a3 KR |
1749 | off_t_or_off64_t off = scm_to_off_t_or_off64_t (offset); |
1750 | off_t_or_off64_t rv; | |
1751 | rv = lseek_or_lseek64 (scm_to_int (fd_port), off, how); | |
840ae05d | 1752 | if (rv == -1) |
1bbd0b84 | 1753 | SCM_SYSERROR; |
23f2b9a3 | 1754 | return scm_from_off_t_or_off64_t (rv); |
840ae05d | 1755 | } |
840ae05d | 1756 | } |
1bbd0b84 | 1757 | #undef FUNC_NAME |
840ae05d | 1758 | |
8ab3d8a0 KR |
1759 | #ifndef O_BINARY |
1760 | #define O_BINARY 0 | |
1761 | #endif | |
1762 | ||
1763 | /* Mingw has ftruncate(), perhaps implemented above using chsize, but | |
1764 | doesn't have the filename version truncate(), hence this code. */ | |
1765 | #if HAVE_FTRUNCATE && ! HAVE_TRUNCATE | |
1766 | static int | |
1767 | truncate (const char *file, off_t length) | |
82893676 | 1768 | { |
8ab3d8a0 KR |
1769 | int ret, fdes; |
1770 | ||
1771 | fdes = open (file, O_BINARY | O_WRONLY); | |
1772 | if (fdes == -1) | |
1773 | return -1; | |
1774 | ||
1775 | ret = ftruncate (fdes, length); | |
1776 | if (ret == -1) | |
82893676 | 1777 | { |
8ab3d8a0 | 1778 | int save_errno = errno; |
82893676 | 1779 | close (fdes); |
8ab3d8a0 KR |
1780 | errno = save_errno; |
1781 | return -1; | |
82893676 | 1782 | } |
8ab3d8a0 KR |
1783 | |
1784 | return close (fdes); | |
82893676 | 1785 | } |
8ab3d8a0 | 1786 | #endif /* HAVE_FTRUNCATE && ! HAVE_TRUNCATE */ |
82893676 | 1787 | |
a1ec6916 | 1788 | SCM_DEFINE (scm_truncate_file, "truncate-file", 1, 1, 0, |
1bbd0b84 | 1789 | (SCM object, SCM length), |
8ab3d8a0 KR |
1790 | "Truncate @var{file} to @var{length} bytes. @var{file} can be a\n" |
1791 | "filename string, a port object, or an integer file descriptor.\n" | |
1792 | "The return value is unspecified.\n" | |
1793 | "\n" | |
1794 | "For a port or file descriptor @var{length} can be omitted, in\n" | |
1795 | "which case the file is truncated at the current position (per\n" | |
1796 | "@code{ftell} above).\n" | |
1797 | "\n" | |
1798 | "On most systems a file can be extended by giving a length\n" | |
1799 | "greater than the current size, but this is not mandatory in the\n" | |
1800 | "POSIX standard.") | |
1bbd0b84 | 1801 | #define FUNC_NAME s_scm_truncate_file |
840ae05d | 1802 | { |
69bc9ff3 | 1803 | int rv; |
69bc9ff3 | 1804 | |
2b829bbb KR |
1805 | /* "object" can be a port, fdes or filename. |
1806 | ||
1807 | Negative "length" makes no sense, but it's left to truncate() or | |
1808 | ftruncate() to give back an error for that (normally EINVAL). | |
1809 | */ | |
840ae05d | 1810 | |
840ae05d JB |
1811 | if (SCM_UNBNDP (length)) |
1812 | { | |
69bc9ff3 | 1813 | /* must supply length if object is a filename. */ |
7f9994d9 | 1814 | if (scm_is_string (object)) |
34d19ef6 | 1815 | SCM_MISC_ERROR("must supply length if OBJECT is a filename", SCM_EOL); |
69bc9ff3 | 1816 | |
e11e83f3 | 1817 | length = scm_seek (object, SCM_INUM0, scm_from_int (SEEK_CUR)); |
840ae05d | 1818 | } |
3fe6190f | 1819 | |
69bc9ff3 | 1820 | object = SCM_COERCE_OUTPORT (object); |
e11e83f3 | 1821 | if (scm_is_integer (object)) |
69bc9ff3 | 1822 | { |
23f2b9a3 KR |
1823 | off_t_or_off64_t c_length = scm_to_off_t_or_off64_t (length); |
1824 | SCM_SYSCALL (rv = ftruncate_or_ftruncate64 (scm_to_int (object), | |
1825 | c_length)); | |
69bc9ff3 | 1826 | } |
0c95b57d | 1827 | else if (SCM_OPOUTPORTP (object)) |
69bc9ff3 | 1828 | { |
f1ce9199 | 1829 | off_t_or_off64_t c_length = scm_to_off_t_or_off64_t (length); |
92c2555f MV |
1830 | scm_t_port *pt = SCM_PTAB_ENTRY (object); |
1831 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); | |
69bc9ff3 | 1832 | |
affc96b5 | 1833 | if (!ptob->truncate) |
1bbd0b84 | 1834 | SCM_MISC_ERROR ("port is not truncatable", SCM_EOL); |
69bc9ff3 | 1835 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1836 | scm_end_input (object); |
69bc9ff3 | 1837 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1838 | ptob->flush (object); |
69bc9ff3 | 1839 | |
affc96b5 | 1840 | ptob->truncate (object, c_length); |
69bc9ff3 GH |
1841 | rv = 0; |
1842 | } | |
1843 | else | |
1844 | { | |
2b829bbb | 1845 | off_t_or_off64_t c_length = scm_to_off_t_or_off64_t (length); |
7f9994d9 MV |
1846 | char *str = scm_to_locale_string (object); |
1847 | int eno; | |
2b829bbb | 1848 | SCM_SYSCALL (rv = truncate_or_truncate64 (str, c_length)); |
7f9994d9 MV |
1849 | eno = errno; |
1850 | free (str); | |
1851 | errno = eno; | |
69bc9ff3 GH |
1852 | } |
1853 | if (rv == -1) | |
1bbd0b84 | 1854 | SCM_SYSERROR; |
840ae05d JB |
1855 | return SCM_UNSPECIFIED; |
1856 | } | |
1bbd0b84 | 1857 | #undef FUNC_NAME |
840ae05d | 1858 | |
a1ec6916 | 1859 | SCM_DEFINE (scm_port_line, "port-line", 1, 0, 0, |
1bbd0b84 | 1860 | (SCM port), |
a150979d KR |
1861 | "Return the current line number for @var{port}.\n" |
1862 | "\n" | |
1863 | "The first line of a file is 0. But you might want to add 1\n" | |
1864 | "when printing line numbers, since starting from 1 is\n" | |
1865 | "traditional in error messages, and likely to be more natural to\n" | |
1866 | "non-programmers.") | |
1bbd0b84 | 1867 | #define FUNC_NAME s_scm_port_line |
0f2d19dd | 1868 | { |
78446828 | 1869 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1870 | SCM_VALIDATE_OPENPORT (1, port); |
651f2cd2 | 1871 | return scm_from_long (SCM_LINUM (port)); |
0f2d19dd | 1872 | } |
1bbd0b84 | 1873 | #undef FUNC_NAME |
0f2d19dd | 1874 | |
a1ec6916 | 1875 | SCM_DEFINE (scm_set_port_line_x, "set-port-line!", 2, 0, 0, |
1bbd0b84 | 1876 | (SCM port, SCM line), |
a150979d KR |
1877 | "Set the current line number for @var{port} to @var{line}. The\n" |
1878 | "first line of a file is 0.") | |
1bbd0b84 | 1879 | #define FUNC_NAME s_scm_set_port_line_x |
d043d8c2 | 1880 | { |
360fc44c | 1881 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1882 | SCM_VALIDATE_OPENPORT (1, port); |
651f2cd2 | 1883 | SCM_PTAB_ENTRY (port)->line_number = scm_to_long (line); |
564478fd | 1884 | return SCM_UNSPECIFIED; |
d043d8c2 | 1885 | } |
1bbd0b84 | 1886 | #undef FUNC_NAME |
d043d8c2 | 1887 | |
a1ec6916 | 1888 | SCM_DEFINE (scm_port_column, "port-column", 1, 0, 0, |
1bbd0b84 | 1889 | (SCM port), |
a150979d KR |
1890 | "Return the current column number of @var{port}.\n" |
1891 | "If the number is\n" | |
b380b885 MD |
1892 | "unknown, the result is #f. Otherwise, the result is a 0-origin integer\n" |
1893 | "- i.e. the first character of the first line is line 0, column 0.\n" | |
1894 | "(However, when you display a file position, for example in an error\n" | |
650a1cf9 | 1895 | "message, we recommend you add 1 to get 1-origin integers. This is\n" |
b380b885 MD |
1896 | "because lines and column numbers traditionally start with 1, and that is\n" |
1897 | "what non-programmers will find most natural.)") | |
1bbd0b84 | 1898 | #define FUNC_NAME s_scm_port_column |
0f2d19dd | 1899 | { |
78446828 | 1900 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1901 | SCM_VALIDATE_OPENPORT (1, port); |
e11e83f3 | 1902 | return scm_from_int (SCM_COL (port)); |
0f2d19dd | 1903 | } |
1bbd0b84 | 1904 | #undef FUNC_NAME |
0f2d19dd | 1905 | |
a1ec6916 | 1906 | SCM_DEFINE (scm_set_port_column_x, "set-port-column!", 2, 0, 0, |
1bbd0b84 | 1907 | (SCM port, SCM column), |
a150979d KR |
1908 | "Set the current column of @var{port}. Before reading the first\n" |
1909 | "character on a line the column should be 0.") | |
1bbd0b84 | 1910 | #define FUNC_NAME s_scm_set_port_column_x |
d043d8c2 | 1911 | { |
360fc44c | 1912 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1913 | SCM_VALIDATE_OPENPORT (1, port); |
a55c2b68 | 1914 | SCM_PTAB_ENTRY (port)->column_number = scm_to_int (column); |
564478fd | 1915 | return SCM_UNSPECIFIED; |
d043d8c2 | 1916 | } |
1bbd0b84 | 1917 | #undef FUNC_NAME |
d043d8c2 | 1918 | |
a1ec6916 | 1919 | SCM_DEFINE (scm_port_filename, "port-filename", 1, 0, 0, |
1bbd0b84 | 1920 | (SCM port), |
b380b885 | 1921 | "Return the filename associated with @var{port}. This function returns\n" |
2a2a730b | 1922 | "the strings \"standard input\", \"standard output\" and \"standard error\"\n" |
a3c8b9fc | 1923 | "when called on the current input, output and error ports respectively.") |
1bbd0b84 | 1924 | #define FUNC_NAME s_scm_port_filename |
0f2d19dd | 1925 | { |
78446828 | 1926 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1927 | SCM_VALIDATE_OPENPORT (1, port); |
b24b5e13 | 1928 | return SCM_FILENAME (port); |
0f2d19dd | 1929 | } |
1bbd0b84 | 1930 | #undef FUNC_NAME |
0f2d19dd | 1931 | |
a1ec6916 | 1932 | SCM_DEFINE (scm_set_port_filename_x, "set-port-filename!", 2, 0, 0, |
1bbd0b84 | 1933 | (SCM port, SCM filename), |
b380b885 MD |
1934 | "Change the filename associated with @var{port}, using the current input\n" |
1935 | "port if none is specified. Note that this does not change the port's\n" | |
1936 | "source of data, but only the value that is returned by\n" | |
1937 | "@code{port-filename} and reported in diagnostic output.") | |
1bbd0b84 | 1938 | #define FUNC_NAME s_scm_set_port_filename_x |
d14af9f2 | 1939 | { |
360fc44c | 1940 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1941 | SCM_VALIDATE_OPENPORT (1, port); |
360fc44c | 1942 | /* We allow the user to set the filename to whatever he likes. */ |
b24b5e13 DH |
1943 | SCM_SET_FILENAME (port, filename); |
1944 | return SCM_UNSPECIFIED; | |
d14af9f2 | 1945 | } |
1bbd0b84 | 1946 | #undef FUNC_NAME |
d14af9f2 | 1947 | |
d6a6989e LC |
1948 | /* A fluid specifying the default encoding for newly created ports. If it is |
1949 | a string, that is the encoding. If it is #f, it is in the "native" | |
1950 | (Latin-1) encoding. */ | |
1951 | SCM_VARIABLE (default_port_encoding_var, "%default-port-encoding"); | |
1952 | ||
889975e5 MG |
1953 | static int scm_port_encoding_init = 0; |
1954 | ||
1955 | /* Return a C string representation of the current encoding. */ | |
1956 | const char * | |
1957 | scm_i_get_port_encoding (SCM port) | |
1958 | { | |
1959 | SCM encoding; | |
1960 | ||
1961 | if (scm_is_false (port)) | |
1962 | { | |
1963 | if (!scm_port_encoding_init) | |
1964 | return NULL; | |
d6a6989e | 1965 | else if (!scm_is_fluid (SCM_VARIABLE_REF (default_port_encoding_var))) |
889975e5 MG |
1966 | return NULL; |
1967 | else | |
1968 | { | |
d6a6989e | 1969 | encoding = scm_fluid_ref (SCM_VARIABLE_REF (default_port_encoding_var)); |
889975e5 MG |
1970 | if (!scm_is_string (encoding)) |
1971 | return NULL; | |
1972 | else | |
1973 | return scm_i_string_chars (encoding); | |
1974 | } | |
1975 | } | |
1976 | else | |
1977 | { | |
1978 | scm_t_port *pt; | |
1979 | pt = SCM_PTAB_ENTRY (port); | |
1980 | if (pt->encoding) | |
1981 | return pt->encoding; | |
1982 | else | |
1983 | return NULL; | |
1984 | } | |
1985 | } | |
1986 | ||
b77afe82 | 1987 | /* Returns ENC if it is a recognized encoding. If it isn't, it tries |
889975e5 MG |
1988 | to find an alias of ENC that is valid. Otherwise, it returns |
1989 | NULL. */ | |
1990 | static const char * | |
1991 | find_valid_encoding (const char *enc) | |
1992 | { | |
1993 | int isvalid = 0; | |
1994 | const char str[] = " "; | |
63479112 | 1995 | scm_t_uint32 result_buf; |
889975e5 MG |
1996 | scm_t_uint32 *u32; |
1997 | size_t u32len; | |
63479112 LC |
1998 | |
1999 | u32len = sizeof (result_buf) / sizeof (scm_t_uint32); | |
889975e5 | 2000 | u32 = u32_conv_from_encoding (enc, iconveh_error, str, 1, |
63479112 | 2001 | NULL, &result_buf, &u32len); |
889975e5 | 2002 | isvalid = (u32 != NULL); |
63479112 LC |
2003 | |
2004 | if (SCM_UNLIKELY (u32 != &result_buf)) | |
2005 | free (u32); | |
2006 | ||
889975e5 MG |
2007 | if (isvalid) |
2008 | return enc; | |
2009 | ||
2010 | return NULL; | |
2011 | } | |
2012 | ||
2013 | void | |
2014 | scm_i_set_port_encoding_x (SCM port, const char *enc) | |
2015 | { | |
2016 | const char *valid_enc; | |
2017 | scm_t_port *pt; | |
2018 | ||
2019 | /* Null is shorthand for the native, Latin-1 encoding. */ | |
2020 | if (enc == NULL) | |
2021 | valid_enc = NULL; | |
2022 | else | |
2023 | { | |
2024 | valid_enc = find_valid_encoding (enc); | |
2025 | if (valid_enc == NULL) | |
f4bc4e59 | 2026 | goto invalid_encoding; |
889975e5 MG |
2027 | } |
2028 | ||
2029 | if (scm_is_false (port)) | |
2030 | { | |
2031 | /* Set the default encoding for future ports. */ | |
2032 | if (!scm_port_encoding_init | |
d6a6989e | 2033 | || !scm_is_fluid (SCM_VARIABLE_REF (default_port_encoding_var))) |
889975e5 MG |
2034 | scm_misc_error (NULL, "tried to set port encoding fluid before it is initialized", |
2035 | SCM_EOL); | |
2036 | ||
2037 | if (valid_enc == NULL | |
2038 | || !strcmp (valid_enc, "ASCII") | |
2039 | || !strcmp (valid_enc, "ANSI_X3.4-1968") | |
2040 | || !strcmp (valid_enc, "ISO-8859-1")) | |
d6a6989e | 2041 | scm_fluid_set_x (SCM_VARIABLE_REF (default_port_encoding_var), SCM_BOOL_F); |
889975e5 | 2042 | else |
d6a6989e | 2043 | scm_fluid_set_x (SCM_VARIABLE_REF (default_port_encoding_var), |
889975e5 MG |
2044 | scm_from_locale_string (valid_enc)); |
2045 | } | |
2046 | else | |
2047 | { | |
f4bc4e59 LC |
2048 | iconv_t new_input_cd, new_output_cd; |
2049 | ||
2050 | new_input_cd = (iconv_t) -1; | |
2051 | new_output_cd = (iconv_t) -1; | |
2052 | ||
889975e5 MG |
2053 | /* Set the character encoding for this port. */ |
2054 | pt = SCM_PTAB_ENTRY (port); | |
889975e5 MG |
2055 | if (valid_enc == NULL) |
2056 | pt->encoding = NULL; | |
2057 | else | |
682d78d0 | 2058 | pt->encoding = scm_gc_strdup (valid_enc, "port"); |
f4bc4e59 LC |
2059 | |
2060 | if (valid_enc == NULL) | |
2061 | valid_enc = "ISO-8859-1"; | |
2062 | ||
2063 | if (SCM_CELL_WORD_0 (port) & SCM_RDNG) | |
2064 | { | |
2065 | /* Open an input iconv conversion descriptor, from VALID_ENC | |
2066 | to UTF-8. We choose UTF-8, not UTF-32, because iconv | |
2067 | implementations can typically convert from anything to | |
2068 | UTF-8, but not to UTF-32 (see | |
2069 | <http://lists.gnu.org/archive/html/bug-libunistring/2010-09/msg00007.html>). */ | |
2070 | new_input_cd = iconv_open ("UTF-8", valid_enc); | |
2071 | if (new_input_cd == (iconv_t) -1) | |
2072 | goto invalid_encoding; | |
2073 | } | |
2074 | ||
2075 | if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) | |
2076 | { | |
2077 | new_output_cd = iconv_open (valid_enc, "UTF-8"); | |
2078 | if (new_output_cd == (iconv_t) -1) | |
2079 | { | |
2080 | if (new_input_cd != (iconv_t) -1) | |
2081 | iconv_close (new_input_cd); | |
2082 | goto invalid_encoding; | |
2083 | } | |
2084 | } | |
2085 | ||
2086 | if (pt->input_cd != (iconv_t) -1) | |
2087 | iconv_close (pt->input_cd); | |
2088 | if (pt->output_cd != (iconv_t) -1) | |
2089 | iconv_close (pt->output_cd); | |
2090 | ||
2091 | pt->input_cd = new_input_cd; | |
2092 | pt->output_cd = new_output_cd; | |
889975e5 | 2093 | } |
f4bc4e59 LC |
2094 | |
2095 | return; | |
2096 | ||
2097 | invalid_encoding: | |
2098 | { | |
2099 | SCM err; | |
2100 | err = scm_from_locale_string (enc); | |
2101 | scm_misc_error (NULL, "invalid or unknown character encoding ~s", | |
2102 | scm_list_1 (err)); | |
2103 | } | |
889975e5 MG |
2104 | } |
2105 | ||
2106 | SCM_DEFINE (scm_port_encoding, "port-encoding", 1, 0, 0, | |
2107 | (SCM port), | |
2108 | "Returns, as a string, the character encoding that @var{port}\n" | |
2109 | "uses to interpret its input and output.\n") | |
2110 | #define FUNC_NAME s_scm_port_encoding | |
2111 | { | |
2112 | scm_t_port *pt; | |
2113 | const char *enc; | |
2114 | ||
2115 | SCM_VALIDATE_PORT (1, port); | |
2116 | ||
2117 | pt = SCM_PTAB_ENTRY (port); | |
2118 | enc = scm_i_get_port_encoding (port); | |
2119 | if (enc) | |
2120 | return scm_from_locale_string (pt->encoding); | |
2121 | else | |
0af34a3f | 2122 | return SCM_BOOL_F; |
889975e5 MG |
2123 | } |
2124 | #undef FUNC_NAME | |
d6a6989e | 2125 | |
889975e5 MG |
2126 | SCM_DEFINE (scm_set_port_encoding_x, "set-port-encoding!", 2, 0, 0, |
2127 | (SCM port, SCM enc), | |
2128 | "Sets the character encoding that will be used to interpret all\n" | |
2129 | "port I/O. New ports are created with the encoding\n" | |
2130 | "appropriate for the current locale if @code{setlocale} has \n" | |
2131 | "been called or ISO-8859-1 otherwise\n" | |
2132 | "and this procedure can be used to modify that encoding.\n") | |
889975e5 MG |
2133 | #define FUNC_NAME s_scm_set_port_encoding_x |
2134 | { | |
2135 | char *enc_str; | |
2136 | const char *valid_enc_str; | |
2137 | ||
2138 | SCM_VALIDATE_PORT (1, port); | |
2139 | SCM_VALIDATE_STRING (2, enc); | |
2140 | ||
2141 | enc_str = scm_to_locale_string (enc); | |
2142 | valid_enc_str = find_valid_encoding (enc_str); | |
2143 | if (valid_enc_str == NULL) | |
2144 | { | |
2145 | free (enc_str); | |
2146 | scm_misc_error (FUNC_NAME, "invalid or unknown character encoding ~s", | |
2147 | scm_list_1 (enc)); | |
2148 | } | |
2149 | else | |
2150 | { | |
2151 | scm_i_set_port_encoding_x (port, valid_enc_str); | |
2152 | free (enc_str); | |
2153 | } | |
2154 | return SCM_UNSPECIFIED; | |
2155 | } | |
2156 | #undef FUNC_NAME | |
2157 | ||
2158 | ||
2159 | /* This determines how conversions handle unconvertible characters. */ | |
2160 | SCM_GLOBAL_VARIABLE (scm_conversion_strategy, "%port-conversion-strategy"); | |
2161 | static int scm_conversion_strategy_init = 0; | |
2162 | ||
2163 | scm_t_string_failed_conversion_handler | |
2164 | scm_i_get_conversion_strategy (SCM port) | |
2165 | { | |
2166 | SCM encoding; | |
2167 | ||
2168 | if (scm_is_false (port)) | |
2169 | { | |
2170 | if (!scm_conversion_strategy_init | |
2171 | || !scm_is_fluid (SCM_VARIABLE_REF (scm_conversion_strategy))) | |
2172 | return SCM_FAILED_CONVERSION_QUESTION_MARK; | |
2173 | else | |
2174 | { | |
2175 | encoding = scm_fluid_ref (SCM_VARIABLE_REF (scm_conversion_strategy)); | |
2176 | if (scm_is_false (encoding)) | |
2177 | return SCM_FAILED_CONVERSION_QUESTION_MARK; | |
2178 | else | |
2179 | return (scm_t_string_failed_conversion_handler) scm_to_int (encoding); | |
2180 | } | |
2181 | } | |
2182 | else | |
2183 | { | |
2184 | scm_t_port *pt; | |
2185 | pt = SCM_PTAB_ENTRY (port); | |
e1ee45e7 | 2186 | return pt->ilseq_handler; |
889975e5 MG |
2187 | } |
2188 | ||
2189 | } | |
2190 | ||
2191 | void | |
2192 | scm_i_set_conversion_strategy_x (SCM port, | |
2193 | scm_t_string_failed_conversion_handler handler) | |
2194 | { | |
2195 | SCM strategy; | |
2196 | scm_t_port *pt; | |
2197 | ||
2198 | strategy = scm_from_int ((int) handler); | |
2199 | ||
2200 | if (scm_is_false (port)) | |
2201 | { | |
2202 | /* Set the default encoding for future ports. */ | |
2203 | if (!scm_conversion_strategy | |
2204 | || !scm_is_fluid (SCM_VARIABLE_REF (scm_conversion_strategy))) | |
2205 | scm_misc_error (NULL, "tried to set conversion strategy fluid before it is initialized", | |
2206 | SCM_EOL); | |
2207 | scm_fluid_set_x (SCM_VARIABLE_REF (scm_conversion_strategy), strategy); | |
2208 | } | |
2209 | else | |
2210 | { | |
2211 | /* Set the character encoding for this port. */ | |
2212 | pt = SCM_PTAB_ENTRY (port); | |
2213 | pt->ilseq_handler = handler; | |
2214 | } | |
2215 | } | |
2216 | ||
2217 | SCM_DEFINE (scm_port_conversion_strategy, "port-conversion-strategy", | |
2218 | 1, 0, 0, (SCM port), | |
2219 | "Returns the behavior of the port when handling a character that\n" | |
2220 | "is not representable in the port's current encoding.\n" | |
2221 | "It returns the symbol @code{error} if unrepresentable characters\n" | |
2222 | "should cause exceptions, @code{substitute} if the port should\n" | |
2223 | "try to replace unrepresentable characters with question marks or\n" | |
2224 | "approximate characters, or @code{escape} if unrepresentable\n" | |
2225 | "characters should be converted to string escapes.\n" | |
2226 | "\n" | |
2227 | "If @var{port} is @code{#f}, then the current default behavior\n" | |
2228 | "will be returned. New ports will have this default behavior\n" | |
2229 | "when they are created.\n") | |
2230 | #define FUNC_NAME s_scm_port_conversion_strategy | |
2231 | { | |
2232 | scm_t_string_failed_conversion_handler h; | |
2233 | ||
2234 | SCM_VALIDATE_OPPORT (1, port); | |
2235 | ||
2236 | if (!scm_is_false (port)) | |
2237 | { | |
2238 | SCM_VALIDATE_OPPORT (1, port); | |
2239 | } | |
2240 | ||
2241 | h = scm_i_get_conversion_strategy (port); | |
2242 | if (h == SCM_FAILED_CONVERSION_ERROR) | |
4a655e50 | 2243 | return scm_from_latin1_symbol ("error"); |
889975e5 | 2244 | else if (h == SCM_FAILED_CONVERSION_QUESTION_MARK) |
4a655e50 | 2245 | return scm_from_latin1_symbol ("substitute"); |
889975e5 | 2246 | else if (h == SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE) |
4a655e50 | 2247 | return scm_from_latin1_symbol ("escape"); |
889975e5 MG |
2248 | else |
2249 | abort (); | |
2250 | ||
2251 | /* Never gets here. */ | |
2252 | return SCM_UNDEFINED; | |
2253 | } | |
2254 | #undef FUNC_NAME | |
2255 | ||
2256 | SCM_DEFINE (scm_set_port_conversion_strategy_x, "set-port-conversion-strategy!", | |
2257 | 2, 0, 0, | |
2258 | (SCM port, SCM sym), | |
2259 | "Sets the behavior of the interpreter when outputting a character\n" | |
2260 | "that is not representable in the port's current encoding.\n" | |
2261 | "@var{sym} can be either @code{'error}, @code{'substitute}, or\n" | |
2262 | "@code{'escape}. If it is @code{'error}, an error will be thrown\n" | |
2263 | "when an unconvertible character is encountered. If it is\n" | |
2264 | "@code{'substitute}, then unconvertible characters will \n" | |
2265 | "be replaced with approximate characters, or with question marks\n" | |
2266 | "if no approximately correct character is available.\n" | |
2267 | "If it is @code{'escape},\n" | |
2268 | "it will appear as a hex escape when output.\n" | |
2269 | "\n" | |
2270 | "If @var{port} is an open port, the conversion error behavior\n" | |
2271 | "is set for that port. If it is @code{#f}, it is set as the\n" | |
2272 | "default behavior for any future ports that get created in\n" | |
2273 | "this thread.\n") | |
2274 | #define FUNC_NAME s_scm_set_port_conversion_strategy_x | |
2275 | { | |
2276 | SCM err; | |
2277 | SCM qm; | |
2278 | SCM esc; | |
2279 | ||
2280 | if (!scm_is_false (port)) | |
2281 | { | |
2282 | SCM_VALIDATE_OPPORT (1, port); | |
2283 | } | |
2284 | ||
4a655e50 | 2285 | err = scm_from_latin1_symbol ("error"); |
889975e5 MG |
2286 | if (scm_is_true (scm_eqv_p (sym, err))) |
2287 | { | |
2288 | scm_i_set_conversion_strategy_x (port, SCM_FAILED_CONVERSION_ERROR); | |
2289 | return SCM_UNSPECIFIED; | |
2290 | } | |
2291 | ||
4a655e50 | 2292 | qm = scm_from_latin1_symbol ("substitute"); |
889975e5 MG |
2293 | if (scm_is_true (scm_eqv_p (sym, qm))) |
2294 | { | |
2295 | scm_i_set_conversion_strategy_x (port, | |
2296 | SCM_FAILED_CONVERSION_QUESTION_MARK); | |
2297 | return SCM_UNSPECIFIED; | |
2298 | } | |
2299 | ||
4a655e50 | 2300 | esc = scm_from_latin1_symbol ("escape"); |
889975e5 MG |
2301 | if (scm_is_true (scm_eqv_p (sym, esc))) |
2302 | { | |
2303 | scm_i_set_conversion_strategy_x (port, | |
2304 | SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE); | |
2305 | return SCM_UNSPECIFIED; | |
2306 | } | |
2307 | ||
2308 | SCM_MISC_ERROR ("unknown conversion behavior ~s", scm_list_1 (sym)); | |
2309 | ||
2310 | return SCM_UNSPECIFIED; | |
2311 | } | |
2312 | #undef FUNC_NAME | |
2313 | ||
2314 | ||
2315 | ||
f12733c9 MD |
2316 | void |
2317 | scm_print_port_mode (SCM exp, SCM port) | |
2318 | { | |
2319 | scm_puts (SCM_CLOSEDP (exp) | |
2320 | ? "closed: " | |
f9a64404 DH |
2321 | : (SCM_RDNG & SCM_CELL_WORD_0 (exp) |
2322 | ? (SCM_WRTNG & SCM_CELL_WORD_0 (exp) | |
f12733c9 MD |
2323 | ? "input-output: " |
2324 | : "input: ") | |
f9a64404 | 2325 | : (SCM_WRTNG & SCM_CELL_WORD_0 (exp) |
f12733c9 MD |
2326 | ? "output: " |
2327 | : "bogus: ")), | |
2328 | port); | |
2329 | } | |
1cc91f1b | 2330 | |
f12733c9 | 2331 | int |
e81d98ec | 2332 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 2333 | { |
f12733c9 MD |
2334 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
2335 | if (!type) | |
2336 | type = "port"; | |
b7f3516f | 2337 | scm_puts ("#<", port); |
f12733c9 | 2338 | scm_print_port_mode (exp, port); |
b7f3516f TT |
2339 | scm_puts (type, port); |
2340 | scm_putc (' ', port); | |
0345e278 | 2341 | scm_uintprint (SCM_CELL_WORD_1 (exp), 16, port); |
b7f3516f | 2342 | scm_putc ('>', port); |
f12733c9 | 2343 | return 1; |
0f2d19dd JB |
2344 | } |
2345 | ||
0f2d19dd | 2346 | \f |
ee149d03 | 2347 | |
d68fee48 | 2348 | /* Void ports. */ |
0f2d19dd | 2349 | |
92c2555f | 2350 | scm_t_bits scm_tc16_void_port = 0; |
0f2d19dd | 2351 | |
e81d98ec | 2352 | static int fill_input_void_port (SCM port SCM_UNUSED) |
283a1a0e | 2353 | { |
70df8af6 | 2354 | return EOF; |
283a1a0e GH |
2355 | } |
2356 | ||
31703ab8 | 2357 | static void |
e81d98ec DH |
2358 | write_void_port (SCM port SCM_UNUSED, |
2359 | const void *data SCM_UNUSED, | |
2360 | size_t size SCM_UNUSED) | |
31703ab8 GH |
2361 | { |
2362 | } | |
2363 | ||
d617ee18 MV |
2364 | static SCM |
2365 | scm_i_void_port (long mode_bits) | |
0f2d19dd | 2366 | { |
9de87eea | 2367 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
402788a9 | 2368 | { |
da220f27 HWN |
2369 | SCM answer = scm_new_port_table_entry (scm_tc16_void_port); |
2370 | scm_t_port * pt = SCM_PTAB_ENTRY(answer); | |
2371 | ||
402788a9 | 2372 | scm_port_non_buffer (pt); |
402788a9 HWN |
2373 | |
2374 | SCM_SETSTREAM (answer, 0); | |
2375 | SCM_SET_CELL_TYPE (answer, scm_tc16_void_port | mode_bits); | |
9de87eea | 2376 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
402788a9 HWN |
2377 | return answer; |
2378 | } | |
0f2d19dd JB |
2379 | } |
2380 | ||
d617ee18 MV |
2381 | SCM |
2382 | scm_void_port (char *mode_str) | |
2383 | { | |
2384 | return scm_i_void_port (scm_mode_bits (mode_str)); | |
2385 | } | |
2386 | ||
a1ec6916 | 2387 | SCM_DEFINE (scm_sys_make_void_port, "%make-void-port", 1, 0, 0, |
1bbd0b84 | 2388 | (SCM mode), |
70df8af6 | 2389 | "Create and return a new void port. A void port acts like\n" |
bb2c02f2 | 2390 | "@file{/dev/null}. The @var{mode} argument\n" |
70df8af6 | 2391 | "specifies the input/output modes for this port: see the\n" |
b380b885 | 2392 | "documentation for @code{open-file} in @ref{File Ports}.") |
1bbd0b84 | 2393 | #define FUNC_NAME s_scm_sys_make_void_port |
0f2d19dd | 2394 | { |
d617ee18 | 2395 | return scm_i_void_port (scm_i_mode_bits (mode)); |
0f2d19dd | 2396 | } |
1bbd0b84 | 2397 | #undef FUNC_NAME |
0f2d19dd | 2398 | |
0f2d19dd | 2399 | \f |
89545eba | 2400 | /* Initialization. */ |
1cc91f1b | 2401 | |
0f2d19dd JB |
2402 | void |
2403 | scm_init_ports () | |
0f2d19dd | 2404 | { |
840ae05d | 2405 | /* lseek() symbols. */ |
e11e83f3 MV |
2406 | scm_c_define ("SEEK_SET", scm_from_int (SEEK_SET)); |
2407 | scm_c_define ("SEEK_CUR", scm_from_int (SEEK_CUR)); | |
2408 | scm_c_define ("SEEK_END", scm_from_int (SEEK_END)); | |
840ae05d | 2409 | |
70df8af6 GH |
2410 | scm_tc16_void_port = scm_make_port_type ("void", fill_input_void_port, |
2411 | write_void_port); | |
9de87eea | 2412 | |
f39448c5 AW |
2413 | cur_inport_fluid = scm_make_fluid (); |
2414 | cur_outport_fluid = scm_make_fluid (); | |
2415 | cur_errport_fluid = scm_make_fluid (); | |
2416 | cur_loadport_fluid = scm_make_fluid (); | |
9de87eea | 2417 | |
f39448c5 | 2418 | scm_i_port_weak_hash = scm_make_weak_key_hash_table (SCM_I_MAKINUM(31)); |
d6a6989e | 2419 | |
a0599745 | 2420 | #include "libguile/ports.x" |
889975e5 | 2421 | |
d6a6989e LC |
2422 | /* Use Latin-1 as the default port encoding. */ |
2423 | SCM_VARIABLE_SET (default_port_encoding_var, scm_make_fluid ()); | |
2424 | scm_fluid_set_x (SCM_VARIABLE_REF (default_port_encoding_var), SCM_BOOL_F); | |
889975e5 | 2425 | scm_port_encoding_init = 1; |
d6a6989e | 2426 | |
889975e5 MG |
2427 | SCM_VARIABLE_SET (scm_conversion_strategy, scm_make_fluid ()); |
2428 | scm_fluid_set_x (SCM_VARIABLE_REF (scm_conversion_strategy), | |
2429 | scm_from_int ((int) SCM_FAILED_CONVERSION_QUESTION_MARK)); | |
2430 | scm_conversion_strategy_init = 1; | |
2431 | ||
0f2d19dd | 2432 | } |
89e00824 ML |
2433 | |
2434 | /* | |
2435 | Local Variables: | |
2436 | c-file-style: "gnu" | |
2437 | End: | |
2438 | */ |