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; |
9d9c66ba | 601 | |
889975e5 MG |
602 | /* Initialize this port with the thread's current default |
603 | encoding. */ | |
9d9c66ba LC |
604 | enc = scm_i_default_port_encoding (); |
605 | entry->encoding = enc ? scm_gc_strdup (enc, "port") : NULL; | |
f4bc4e59 LC |
606 | |
607 | /* The conversion descriptors will be opened lazily. */ | |
608 | entry->input_cd = (iconv_t) -1; | |
609 | entry->output_cd = (iconv_t) -1; | |
610 | ||
889975e5 | 611 | entry->ilseq_handler = scm_i_get_conversion_strategy (SCM_BOOL_F); |
5f16b897 | 612 | |
5dbc6c06 HWN |
613 | SCM_SET_CELL_TYPE (z, tag); |
614 | SCM_SETPTAB_ENTRY (z, entry); | |
840ae05d | 615 | |
5dbc6c06 | 616 | scm_hashq_set_x (scm_i_port_weak_hash, z, SCM_BOOL_F); |
651a0735 LC |
617 | |
618 | /* For each new port, register a finalizer so that it port type's free | |
619 | function can be invoked eventually. */ | |
620 | register_finalizer_for_port (z); | |
621 | ||
da220f27 | 622 | return z; |
0f2d19dd | 623 | } |
c6c79933 | 624 | #undef FUNC_NAME |
0f2d19dd | 625 | |
67329a9e HWN |
626 | #if SCM_ENABLE_DEPRECATED==1 |
627 | SCM_API scm_t_port * | |
628 | scm_add_to_port_table (SCM port) | |
629 | { | |
630 | SCM z = scm_new_port_table_entry (scm_tc7_port); | |
631 | scm_t_port * pt = SCM_PTAB_ENTRY(z); | |
632 | ||
633 | pt->port = port; | |
5dbc6c06 HWN |
634 | SCM_SETCAR (z, SCM_EOL); |
635 | SCM_SETCDR (z, SCM_EOL); | |
85835e59 | 636 | SCM_SETPTAB_ENTRY (port, pt); |
67329a9e HWN |
637 | return pt; |
638 | } | |
639 | #endif | |
640 | ||
641 | ||
6c951427 | 642 | /* Remove a port from the table and destroy it. */ |
b9ad392e MD |
643 | |
644 | /* This function is not and should not be thread safe. */ | |
0f2d19dd | 645 | void |
5dbc6c06 HWN |
646 | scm_i_remove_port (SCM port) |
647 | #define FUNC_NAME "scm_remove_port" | |
0f2d19dd | 648 | { |
92c2555f | 649 | scm_t_port *p = SCM_PTAB_ENTRY (port); |
682d78d0 LC |
650 | |
651 | scm_port_non_buffer (p); | |
652 | ||
653 | p->putback_buf = NULL; | |
654 | p->putback_buf_size = 0; | |
5dbc6c06 | 655 | |
0f2d19dd | 656 | SCM_SETPTAB_ENTRY (port, 0); |
5dbc6c06 | 657 | scm_hashq_remove_x (scm_i_port_weak_hash, port); |
0f2d19dd | 658 | } |
db4b4ca6 DH |
659 | #undef FUNC_NAME |
660 | ||
0f2d19dd | 661 | |
b450f070 | 662 | /* Functions for debugging. */ |
5dbc6c06 | 663 | #ifdef GUILE_DEBUG |
3b3b36dd | 664 | SCM_DEFINE (scm_pt_size, "pt-size", 0, 0, 0, |
b450f070 | 665 | (), |
1e6808ea | 666 | "Return the number of ports in the port table. @code{pt-size}\n" |
5352393c | 667 | "is only included in @code{--enable-guile-debug} builds.") |
1bbd0b84 | 668 | #define FUNC_NAME s_scm_pt_size |
0f2d19dd | 669 | { |
5dbc6c06 | 670 | return scm_from_int (SCM_HASHTABLE_N_ITEMS (scm_i_port_weak_hash)); |
0f2d19dd | 671 | } |
1bbd0b84 | 672 | #undef FUNC_NAME |
0f2d19dd JB |
673 | #endif |
674 | ||
70df8af6 | 675 | void |
92c2555f | 676 | scm_port_non_buffer (scm_t_port *pt) |
70df8af6 GH |
677 | { |
678 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; | |
679 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
680 | pt->read_buf_size = pt->write_buf_size = 1; | |
681 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
682 | } | |
0f2d19dd | 683 | |
d68fee48 JB |
684 | \f |
685 | /* Revealed counts --- an oddity inherited from SCSH. */ | |
686 | ||
8b13c6b3 GH |
687 | /* Find a port in the table and return its revealed count. |
688 | Also used by the garbage collector. | |
0f2d19dd | 689 | */ |
1cc91f1b | 690 | |
0f2d19dd | 691 | int |
a284e297 | 692 | scm_revealed_count (SCM port) |
0f2d19dd JB |
693 | { |
694 | return SCM_REVEALED(port); | |
695 | } | |
696 | ||
697 | ||
698 | ||
699 | /* Return the revealed count for a port. */ | |
700 | ||
3b3b36dd | 701 | SCM_DEFINE (scm_port_revealed, "port-revealed", 1, 0, 0, |
1bbd0b84 | 702 | (SCM port), |
1e6808ea | 703 | "Return the revealed count for @var{port}.") |
1bbd0b84 | 704 | #define FUNC_NAME s_scm_port_revealed |
0f2d19dd | 705 | { |
78446828 | 706 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 707 | SCM_VALIDATE_OPENPORT (1, port); |
e11e83f3 | 708 | return scm_from_int (scm_revealed_count (port)); |
0f2d19dd | 709 | } |
1bbd0b84 | 710 | #undef FUNC_NAME |
0f2d19dd JB |
711 | |
712 | /* Set the revealed count for a port. */ | |
3b3b36dd | 713 | SCM_DEFINE (scm_set_port_revealed_x, "set-port-revealed!", 2, 0, 0, |
1bbd0b84 | 714 | (SCM port, SCM rcount), |
b450f070 | 715 | "Sets the revealed count for a port to a given value.\n" |
b380b885 | 716 | "The return value is unspecified.") |
1bbd0b84 | 717 | #define FUNC_NAME s_scm_set_port_revealed_x |
0f2d19dd | 718 | { |
78446828 | 719 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 720 | SCM_VALIDATE_OPENPORT (1, port); |
a55c2b68 | 721 | SCM_REVEALED (port) = scm_to_int (rcount); |
8b13c6b3 | 722 | return SCM_UNSPECIFIED; |
0f2d19dd | 723 | } |
1bbd0b84 | 724 | #undef FUNC_NAME |
0f2d19dd | 725 | |
d68fee48 JB |
726 | |
727 | \f | |
728 | /* Retrieving a port's mode. */ | |
729 | ||
eadd48de GH |
730 | /* Return the flags that characterize a port based on the mode |
731 | * string used to open a file for that port. | |
732 | * | |
733 | * See PORT FLAGS in scm.h | |
734 | */ | |
735 | ||
3a5fb14d | 736 | static long |
889975e5 | 737 | scm_i_mode_bits_n (SCM modes) |
3a5fb14d MV |
738 | { |
739 | return (SCM_OPN | |
889975e5 MG |
740 | | (scm_i_string_contains_char (modes, 'r') |
741 | || scm_i_string_contains_char (modes, '+') ? SCM_RDNG : 0) | |
742 | | (scm_i_string_contains_char (modes, 'w') | |
743 | || scm_i_string_contains_char (modes, 'a') | |
744 | || scm_i_string_contains_char (modes, '+') ? SCM_WRTNG : 0) | |
745 | | (scm_i_string_contains_char (modes, '0') ? SCM_BUF0 : 0) | |
746 | | (scm_i_string_contains_char (modes, 'l') ? SCM_BUFLINE : 0)); | |
3a5fb14d MV |
747 | } |
748 | ||
eadd48de | 749 | long |
a284e297 | 750 | scm_mode_bits (char *modes) |
eadd48de | 751 | { |
889975e5 | 752 | return scm_i_mode_bits (scm_from_locale_string (modes)); |
eadd48de GH |
753 | } |
754 | ||
d617ee18 MV |
755 | long |
756 | scm_i_mode_bits (SCM modes) | |
757 | { | |
758 | long bits; | |
759 | ||
760 | if (!scm_is_string (modes)) | |
761 | scm_wrong_type_arg_msg (NULL, 0, modes, "string"); | |
762 | ||
889975e5 | 763 | bits = scm_i_mode_bits_n (modes); |
d617ee18 MV |
764 | scm_remember_upto_here_1 (modes); |
765 | return bits; | |
766 | } | |
eadd48de GH |
767 | |
768 | /* Return the mode flags from an open port. | |
769 | * Some modes such as "append" are only used when opening | |
770 | * a file and are not returned here. */ | |
771 | ||
3b3b36dd | 772 | SCM_DEFINE (scm_port_mode, "port-mode", 1, 0, 0, |
1bbd0b84 | 773 | (SCM port), |
1e6808ea MG |
774 | "Return the port modes associated with the open port @var{port}.\n" |
775 | "These will not necessarily be identical to the modes used when\n" | |
776 | "the port was opened, since modes such as \"append\" which are\n" | |
777 | "used only during port creation are not retained.") | |
1bbd0b84 | 778 | #define FUNC_NAME s_scm_port_mode |
eadd48de | 779 | { |
26a3038d | 780 | char modes[4]; |
eadd48de | 781 | modes[0] = '\0'; |
78446828 MV |
782 | |
783 | port = SCM_COERCE_OUTPORT (port); | |
34d19ef6 | 784 | SCM_VALIDATE_OPPORT (1, port); |
f9a64404 DH |
785 | if (SCM_CELL_WORD_0 (port) & SCM_RDNG) { |
786 | if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) | |
eadd48de GH |
787 | strcpy (modes, "r+"); |
788 | else | |
789 | strcpy (modes, "r"); | |
790 | } | |
f9a64404 | 791 | else if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) |
eadd48de | 792 | strcpy (modes, "w"); |
f9a64404 | 793 | if (SCM_CELL_WORD_0 (port) & SCM_BUF0) |
eadd48de | 794 | strcat (modes, "0"); |
3a5fb14d | 795 | return scm_from_locale_string (modes); |
eadd48de | 796 | } |
1bbd0b84 | 797 | #undef FUNC_NAME |
eadd48de GH |
798 | |
799 | ||
d68fee48 JB |
800 | \f |
801 | /* Closing ports. */ | |
802 | ||
0f2d19dd JB |
803 | /* scm_close_port |
804 | * Call the close operation on a port object. | |
eadd48de | 805 | * see also scm_close. |
0f2d19dd | 806 | */ |
3b3b36dd | 807 | SCM_DEFINE (scm_close_port, "close-port", 1, 0, 0, |
1bbd0b84 | 808 | (SCM port), |
1e6808ea MG |
809 | "Close the specified port object. Return @code{#t} if it\n" |
810 | "successfully closes a port or @code{#f} if it was already\n" | |
811 | "closed. An exception may be raised if an error occurs, for\n" | |
812 | "example when flushing buffered output. See also @ref{Ports and\n" | |
813 | "File Descriptors, close}, for a procedure which can close file\n" | |
814 | "descriptors.") | |
1bbd0b84 | 815 | #define FUNC_NAME s_scm_close_port |
0f2d19dd | 816 | { |
1be6b49c | 817 | size_t i; |
eadd48de GH |
818 | int rv; |
819 | ||
78446828 MV |
820 | port = SCM_COERCE_OUTPORT (port); |
821 | ||
7a754ca6 | 822 | SCM_VALIDATE_PORT (1, port); |
0f2d19dd | 823 | if (SCM_CLOSEDP (port)) |
eadd48de | 824 | return SCM_BOOL_F; |
0f2d19dd | 825 | i = SCM_PTOBNUM (port); |
affc96b5 GH |
826 | if (scm_ptobs[i].close) |
827 | rv = (scm_ptobs[i].close) (port); | |
eadd48de GH |
828 | else |
829 | rv = 0; | |
9de87eea | 830 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
5dbc6c06 | 831 | scm_i_remove_port (port); |
9de87eea | 832 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
22a52da1 | 833 | SCM_CLR_PORT_OPEN_FLAG (port); |
7888309b | 834 | return scm_from_bool (rv >= 0); |
7a754ca6 MD |
835 | } |
836 | #undef FUNC_NAME | |
837 | ||
838 | SCM_DEFINE (scm_close_input_port, "close-input-port", 1, 0, 0, | |
839 | (SCM port), | |
840 | "Close the specified input port object. The routine has no effect if\n" | |
841 | "the file has already been closed. An exception may be raised if an\n" | |
842 | "error occurs. The value returned is unspecified.\n\n" | |
843 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
844 | "which can close file descriptors.") | |
845 | #define FUNC_NAME s_scm_close_input_port | |
846 | { | |
847 | SCM_VALIDATE_INPUT_PORT (1, port); | |
848 | scm_close_port (port); | |
849 | return SCM_UNSPECIFIED; | |
850 | } | |
851 | #undef FUNC_NAME | |
852 | ||
853 | SCM_DEFINE (scm_close_output_port, "close-output-port", 1, 0, 0, | |
854 | (SCM port), | |
855 | "Close the specified output port object. The routine has no effect if\n" | |
856 | "the file has already been closed. An exception may be raised if an\n" | |
857 | "error occurs. The value returned is unspecified.\n\n" | |
858 | "See also @ref{Ports and File Descriptors, close}, for a procedure\n" | |
859 | "which can close file descriptors.") | |
860 | #define FUNC_NAME s_scm_close_output_port | |
861 | { | |
862 | port = SCM_COERCE_OUTPORT (port); | |
863 | SCM_VALIDATE_OUTPUT_PORT (1, port); | |
864 | scm_close_port (port); | |
865 | return SCM_UNSPECIFIED; | |
0f2d19dd | 866 | } |
1bbd0b84 | 867 | #undef FUNC_NAME |
0f2d19dd | 868 | |
5dbc6c06 HWN |
869 | static SCM |
870 | scm_i_collect_keys_in_vector (void *closure, SCM key, SCM value, SCM result) | |
871 | { | |
872 | int *i = (int*) closure; | |
873 | scm_c_vector_set_x (result, *i, key); | |
874 | (*i)++; | |
875 | ||
876 | return result; | |
877 | } | |
878 | ||
c536b4b3 MV |
879 | void |
880 | scm_c_port_for_each (void (*proc)(void *data, SCM p), void *data) | |
c2ca4493 | 881 | { |
5dbc6c06 | 882 | int i = 0; |
3a5fb14d | 883 | size_t n; |
fdfe6305 MV |
884 | SCM ports; |
885 | ||
fdfe6305 MV |
886 | /* Even without pre-emptive multithreading, running arbitrary code |
887 | while scanning the port table is unsafe because the port table | |
3a5fb14d MV |
888 | can change arbitrarily (from a GC, for example). So we first |
889 | collect the ports into a vector. -mvo */ | |
fdfe6305 | 890 | |
9de87eea | 891 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
5dbc6c06 | 892 | n = SCM_HASHTABLE_N_ITEMS (scm_i_port_weak_hash); |
9de87eea | 893 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
4057a3e0 | 894 | ports = scm_c_make_vector (n, SCM_BOOL_F); |
3a5fb14d | 895 | |
5dbc6c06 HWN |
896 | scm_i_pthread_mutex_lock (&scm_i_port_table_mutex); |
897 | ports = scm_internal_hash_fold (scm_i_collect_keys_in_vector, &i, | |
898 | ports, scm_i_port_weak_hash); | |
9de87eea | 899 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
3a5fb14d | 900 | |
5dbc6c06 HWN |
901 | for (i = 0; i < n; i++) { |
902 | SCM p = SCM_SIMPLE_VECTOR_REF (ports, i); | |
903 | if (SCM_PORTP (p)) | |
904 | proc (data, p); | |
905 | } | |
bd83658e RB |
906 | |
907 | scm_remember_upto_here_1 (ports); | |
c536b4b3 | 908 | } |
fdfe6305 | 909 | |
c536b4b3 MV |
910 | SCM_DEFINE (scm_port_for_each, "port-for-each", 1, 0, 0, |
911 | (SCM proc), | |
912 | "Apply @var{proc} to each port in the Guile port table\n" | |
913 | "in turn. The return value is unspecified. More specifically,\n" | |
914 | "@var{proc} is applied exactly once to every port that exists\n" | |
915 | "in the system at the time @var{port-for-each} is invoked.\n" | |
916 | "Changes to the port table while @var{port-for-each} is running\n" | |
917 | "have no effect as far as @var{port-for-each} is concerned.") | |
918 | #define FUNC_NAME s_scm_port_for_each | |
919 | { | |
920 | SCM_VALIDATE_PROC (1, proc); | |
921 | ||
922 | scm_c_port_for_each ((void (*)(void*,SCM))scm_call_1, proc); | |
c2ca4493 GH |
923 | return SCM_UNSPECIFIED; |
924 | } | |
925 | #undef FUNC_NAME | |
926 | ||
c536b4b3 | 927 | |
d68fee48 JB |
928 | \f |
929 | /* Utter miscellany. Gosh, we should clean this up some time. */ | |
930 | ||
3b3b36dd | 931 | SCM_DEFINE (scm_input_port_p, "input-port?", 1, 0, 0, |
1bbd0b84 | 932 | (SCM x), |
1e6808ea MG |
933 | "Return @code{#t} if @var{x} is an input port, otherwise return\n" |
934 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
935 | "@code{port?}.") | |
1bbd0b84 | 936 | #define FUNC_NAME s_scm_input_port_p |
0f2d19dd | 937 | { |
7888309b | 938 | return scm_from_bool (SCM_INPUT_PORT_P (x)); |
0f2d19dd | 939 | } |
1bbd0b84 | 940 | #undef FUNC_NAME |
0f2d19dd | 941 | |
3b3b36dd | 942 | SCM_DEFINE (scm_output_port_p, "output-port?", 1, 0, 0, |
1bbd0b84 | 943 | (SCM x), |
1e6808ea MG |
944 | "Return @code{#t} if @var{x} is an output port, otherwise return\n" |
945 | "@code{#f}. Any object satisfying this predicate also satisfies\n" | |
946 | "@code{port?}.") | |
1bbd0b84 | 947 | #define FUNC_NAME s_scm_output_port_p |
0f2d19dd | 948 | { |
82893676 | 949 | x = SCM_COERCE_OUTPORT (x); |
7888309b | 950 | return scm_from_bool (SCM_OUTPUT_PORT_P (x)); |
0f2d19dd | 951 | } |
1bbd0b84 | 952 | #undef FUNC_NAME |
0f2d19dd | 953 | |
eb5c0a2a GH |
954 | SCM_DEFINE (scm_port_p, "port?", 1, 0, 0, |
955 | (SCM x), | |
1e6808ea | 956 | "Return a boolean indicating whether @var{x} is a port.\n" |
5352393c MG |
957 | "Equivalent to @code{(or (input-port? @var{x}) (output-port?\n" |
958 | "@var{x}))}.") | |
eb5c0a2a GH |
959 | #define FUNC_NAME s_scm_port_p |
960 | { | |
7888309b | 961 | return scm_from_bool (SCM_PORTP (x)); |
eb5c0a2a GH |
962 | } |
963 | #undef FUNC_NAME | |
964 | ||
3b3b36dd | 965 | SCM_DEFINE (scm_port_closed_p, "port-closed?", 1, 0, 0, |
1bbd0b84 | 966 | (SCM port), |
1e6808ea MG |
967 | "Return @code{#t} if @var{port} is closed or @code{#f} if it is\n" |
968 | "open.") | |
1bbd0b84 | 969 | #define FUNC_NAME s_scm_port_closed_p |
60d0643d | 970 | { |
34d19ef6 | 971 | SCM_VALIDATE_PORT (1, port); |
7888309b | 972 | return scm_from_bool (!SCM_OPPORTP (port)); |
60d0643d | 973 | } |
1bbd0b84 | 974 | #undef FUNC_NAME |
0f2d19dd | 975 | |
3b3b36dd | 976 | SCM_DEFINE (scm_eof_object_p, "eof-object?", 1, 0, 0, |
1bbd0b84 | 977 | (SCM x), |
1e6808ea MG |
978 | "Return @code{#t} if @var{x} is an end-of-file object; otherwise\n" |
979 | "return @code{#f}.") | |
1bbd0b84 | 980 | #define FUNC_NAME s_scm_eof_object_p |
0f2d19dd | 981 | { |
7888309b | 982 | return scm_from_bool(SCM_EOF_OBJECT_P (x)); |
0f2d19dd | 983 | } |
1bbd0b84 | 984 | #undef FUNC_NAME |
0f2d19dd | 985 | |
3b3b36dd | 986 | SCM_DEFINE (scm_force_output, "force-output", 0, 1, 0, |
1bbd0b84 | 987 | (SCM port), |
b380b885 | 988 | "Flush the specified output port, or the current output port if @var{port}\n" |
9401323e | 989 | "is omitted. The current output buffer contents are passed to the\n" |
b380b885 MD |
990 | "underlying port implementation (e.g., in the case of fports, the\n" |
991 | "data will be written to the file and the output buffer will be cleared.)\n" | |
992 | "It has no effect on an unbuffered port.\n\n" | |
993 | "The return value is unspecified.") | |
1bbd0b84 | 994 | #define FUNC_NAME s_scm_force_output |
0f2d19dd JB |
995 | { |
996 | if (SCM_UNBNDP (port)) | |
9de87eea | 997 | port = scm_current_output_port (); |
0f2d19dd | 998 | else |
78446828 MV |
999 | { |
1000 | port = SCM_COERCE_OUTPORT (port); | |
34d19ef6 | 1001 | SCM_VALIDATE_OPOUTPORT (1, port); |
78446828 | 1002 | } |
affc96b5 | 1003 | scm_flush (port); |
ee149d03 | 1004 | return SCM_UNSPECIFIED; |
0f2d19dd | 1005 | } |
1bbd0b84 | 1006 | #undef FUNC_NAME |
0f2d19dd | 1007 | |
5dbc6c06 HWN |
1008 | |
1009 | static void | |
61d3568b | 1010 | flush_output_port (void *closure, SCM port) |
5dbc6c06 | 1011 | { |
5dbc6c06 HWN |
1012 | if (SCM_OPOUTPORTP (port)) |
1013 | scm_flush (port); | |
1014 | } | |
1015 | ||
a1ec6916 | 1016 | SCM_DEFINE (scm_flush_all_ports, "flush-all-ports", 0, 0, 0, |
1bbd0b84 | 1017 | (), |
b380b885 MD |
1018 | "Equivalent to calling @code{force-output} on\n" |
1019 | "all open output ports. The return value is unspecified.") | |
1bbd0b84 | 1020 | #define FUNC_NAME s_scm_flush_all_ports |
89ea5b7c | 1021 | { |
5dbc6c06 | 1022 | scm_c_port_for_each (&flush_output_port, NULL); |
89ea5b7c GH |
1023 | return SCM_UNSPECIFIED; |
1024 | } | |
1bbd0b84 | 1025 | #undef FUNC_NAME |
0f2d19dd | 1026 | |
3b3b36dd | 1027 | SCM_DEFINE (scm_read_char, "read-char", 0, 1, 0, |
1bbd0b84 | 1028 | (SCM port), |
1e6808ea MG |
1029 | "Return the next character available from @var{port}, updating\n" |
1030 | "@var{port} to point to the following character. If no more\n" | |
c62da8f8 LC |
1031 | "characters are available, the end-of-file object is returned.\n" |
1032 | "\n" | |
1033 | "When @var{port}'s data cannot be decoded according to its\n" | |
1034 | "character encoding, a @code{decoding-error} is raised and\n" | |
1035 | "@var{port} points past the erroneous byte sequence.\n") | |
1bbd0b84 | 1036 | #define FUNC_NAME s_scm_read_char |
0f2d19dd | 1037 | { |
889975e5 | 1038 | scm_t_wchar c; |
0f2d19dd | 1039 | if (SCM_UNBNDP (port)) |
9de87eea | 1040 | port = scm_current_input_port (); |
34d19ef6 | 1041 | SCM_VALIDATE_OPINPORT (1, port); |
b7f3516f | 1042 | c = scm_getc (port); |
0f2d19dd JB |
1043 | if (EOF == c) |
1044 | return SCM_EOF_VAL; | |
7866a09b | 1045 | return SCM_MAKE_CHAR (c); |
0f2d19dd | 1046 | } |
1bbd0b84 | 1047 | #undef FUNC_NAME |
0f2d19dd | 1048 | |
f4bc4e59 LC |
1049 | /* Update the line and column number of PORT after consumption of C. */ |
1050 | static inline void | |
1051 | update_port_lf (scm_t_wchar c, SCM port) | |
1052 | { | |
1053 | switch (c) | |
1054 | { | |
1055 | case '\a': | |
1056 | break; | |
1057 | case '\b': | |
1058 | SCM_DECCOL (port); | |
1059 | break; | |
1060 | case '\n': | |
1061 | SCM_INCLINE (port); | |
1062 | break; | |
1063 | case '\r': | |
1064 | SCM_ZEROCOL (port); | |
1065 | break; | |
1066 | case '\t': | |
1067 | SCM_TABCOL (port); | |
1068 | break; | |
1069 | default: | |
1070 | SCM_INCCOL (port); | |
1071 | break; | |
1072 | } | |
1073 | } | |
1074 | ||
889975e5 MG |
1075 | #define SCM_MBCHAR_BUF_SIZE (4) |
1076 | ||
f4bc4e59 LC |
1077 | /* Convert the SIZE-byte UTF-8 sequence in UTF8_BUF to a codepoint. |
1078 | UTF8_BUF is assumed to contain a valid UTF-8 sequence. */ | |
1079 | static scm_t_wchar | |
1080 | utf8_to_codepoint (const scm_t_uint8 *utf8_buf, size_t size) | |
1081 | { | |
1082 | scm_t_wchar codepoint; | |
1083 | ||
1084 | if (utf8_buf[0] <= 0x7f) | |
1085 | { | |
1086 | assert (size == 1); | |
1087 | codepoint = utf8_buf[0]; | |
1088 | } | |
1089 | else if ((utf8_buf[0] & 0xe0) == 0xc0) | |
1090 | { | |
1091 | assert (size == 2); | |
1092 | codepoint = ((scm_t_wchar) utf8_buf[0] & 0x1f) << 6UL | |
1093 | | (utf8_buf[1] & 0x3f); | |
1094 | } | |
1095 | else if ((utf8_buf[0] & 0xf0) == 0xe0) | |
1096 | { | |
1097 | assert (size == 3); | |
1098 | codepoint = ((scm_t_wchar) utf8_buf[0] & 0x0f) << 12UL | |
1099 | | ((scm_t_wchar) utf8_buf[1] & 0x3f) << 6UL | |
1100 | | (utf8_buf[2] & 0x3f); | |
1101 | } | |
1102 | else | |
1103 | { | |
1104 | assert (size == 4); | |
1105 | codepoint = ((scm_t_wchar) utf8_buf[0] & 0x07) << 18UL | |
1106 | | ((scm_t_wchar) utf8_buf[1] & 0x3f) << 12UL | |
1107 | | ((scm_t_wchar) utf8_buf[2] & 0x3f) << 6UL | |
1108 | | (utf8_buf[3] & 0x3f); | |
1109 | } | |
1110 | ||
1111 | return codepoint; | |
1112 | } | |
1113 | ||
c62da8f8 LC |
1114 | /* Read a codepoint from PORT and return it in *CODEPOINT. Fill BUF |
1115 | with the byte representation of the codepoint in PORT's encoding, and | |
1116 | set *LEN to the length in bytes of that representation. Return 0 on | |
1117 | success and an errno value on error. */ | |
1118 | static int | |
1119 | get_codepoint (SCM port, scm_t_wchar *codepoint, | |
1120 | char buf[SCM_MBCHAR_BUF_SIZE], size_t *len) | |
889975e5 | 1121 | { |
f4bc4e59 LC |
1122 | int err, byte_read; |
1123 | size_t bytes_consumed, output_size; | |
f4bc4e59 LC |
1124 | char *output; |
1125 | scm_t_uint8 utf8_buf[SCM_MBCHAR_BUF_SIZE]; | |
889975e5 MG |
1126 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1127 | ||
f4bc4e59 LC |
1128 | if (SCM_UNLIKELY (pt->input_cd == (iconv_t) -1)) |
1129 | /* Initialize the conversion descriptors. */ | |
1130 | scm_i_set_port_encoding_x (port, pt->encoding); | |
889975e5 | 1131 | |
f4bc4e59 LC |
1132 | for (output_size = 0, output = (char *) utf8_buf, |
1133 | bytes_consumed = 0, err = 0; | |
1134 | err == 0 && output_size == 0 | |
1135 | && (bytes_consumed == 0 || byte_read != EOF); | |
1136 | bytes_consumed++) | |
63479112 | 1137 | { |
f4bc4e59 LC |
1138 | char *input; |
1139 | size_t input_left, output_left, done; | |
889975e5 | 1140 | |
f4bc4e59 LC |
1141 | byte_read = scm_get_byte_or_eof (port); |
1142 | if (byte_read == EOF) | |
889975e5 | 1143 | { |
f4bc4e59 | 1144 | if (bytes_consumed == 0) |
c62da8f8 LC |
1145 | { |
1146 | *codepoint = (scm_t_wchar) EOF; | |
1147 | *len = 0; | |
1148 | return 0; | |
1149 | } | |
f4bc4e59 LC |
1150 | else |
1151 | continue; | |
889975e5 MG |
1152 | } |
1153 | ||
f4bc4e59 | 1154 | buf[bytes_consumed] = byte_read; |
889975e5 | 1155 | |
f4bc4e59 LC |
1156 | input = buf; |
1157 | input_left = bytes_consumed + 1; | |
1158 | output_left = sizeof (utf8_buf); | |
889975e5 | 1159 | |
f4bc4e59 LC |
1160 | done = iconv (pt->input_cd, &input, &input_left, |
1161 | &output, &output_left); | |
1162 | if (done == (size_t) -1) | |
889975e5 | 1163 | { |
f4bc4e59 LC |
1164 | err = errno; |
1165 | if (err == EINVAL) | |
1166 | /* Missing input: keep trying. */ | |
1167 | err = 0; | |
889975e5 | 1168 | } |
f4bc4e59 LC |
1169 | else |
1170 | output_size = sizeof (utf8_buf) - output_left; | |
889975e5 MG |
1171 | } |
1172 | ||
c62da8f8 | 1173 | if (SCM_UNLIKELY (err != 0)) |
cc540d0b LC |
1174 | { |
1175 | /* Reset the `iconv' state. */ | |
1176 | iconv (pt->input_cd, NULL, NULL, NULL, NULL); | |
1177 | ||
1178 | if (pt->ilseq_handler == SCM_ICONVEH_QUESTION_MARK) | |
c62da8f8 LC |
1179 | { |
1180 | *codepoint = '?'; | |
1181 | err = 0; | |
1182 | } | |
1183 | ||
1184 | /* Fail when the strategy is SCM_ICONVEH_ERROR or | |
1185 | SCM_ICONVEH_ESCAPE_SEQUENCE (the latter doesn't make sense for | |
1186 | input encoding errors.) */ | |
cc540d0b LC |
1187 | } |
1188 | else | |
1189 | /* Convert the UTF8_BUF sequence to a Unicode code point. */ | |
c62da8f8 | 1190 | *codepoint = utf8_to_codepoint (utf8_buf, output_size); |
f4bc4e59 | 1191 | |
c62da8f8 LC |
1192 | if (SCM_LIKELY (err == 0)) |
1193 | update_port_lf (*codepoint, port); | |
889975e5 | 1194 | |
f4bc4e59 | 1195 | *len = bytes_consumed; |
fd5eec2b | 1196 | |
c62da8f8 | 1197 | return err; |
889975e5 MG |
1198 | } |
1199 | ||
fd5eec2b LC |
1200 | /* Read a codepoint from PORT and return it. */ |
1201 | scm_t_wchar | |
1202 | scm_getc (SCM port) | |
c62da8f8 | 1203 | #define FUNC_NAME "scm_getc" |
fd5eec2b | 1204 | { |
c62da8f8 | 1205 | int err; |
fd5eec2b | 1206 | size_t len; |
c62da8f8 | 1207 | scm_t_wchar codepoint; |
fd5eec2b LC |
1208 | char buf[SCM_MBCHAR_BUF_SIZE]; |
1209 | ||
c62da8f8 LC |
1210 | err = get_codepoint (port, &codepoint, buf, &len); |
1211 | if (SCM_UNLIKELY (err != 0)) | |
1212 | /* At this point PORT should point past the invalid encoding, as per | |
1213 | R6RS-lib Section 8.2.4. */ | |
1214 | scm_decoding_error (FUNC_NAME, err, "input decoding error", port); | |
1215 | ||
1216 | return codepoint; | |
fd5eec2b | 1217 | } |
c62da8f8 | 1218 | #undef FUNC_NAME |
889975e5 | 1219 | |
5c070ca7 | 1220 | /* this should only be called when the read buffer is empty. it |
affc96b5 | 1221 | tries to refill the read buffer. it returns the first char from |
5c070ca7 | 1222 | the port, which is either EOF or *(pt->read_pos). */ |
6c951427 | 1223 | int |
affc96b5 | 1224 | scm_fill_input (SCM port) |
6c951427 | 1225 | { |
92c2555f | 1226 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e | 1227 | |
b5cb4464 NJ |
1228 | assert (pt->read_pos == pt->read_end); |
1229 | ||
6c951427 GH |
1230 | if (pt->read_buf == pt->putback_buf) |
1231 | { | |
1232 | /* finished reading put-back chars. */ | |
1233 | pt->read_buf = pt->saved_read_buf; | |
1234 | pt->read_pos = pt->saved_read_pos; | |
1235 | pt->read_end = pt->saved_read_end; | |
1236 | pt->read_buf_size = pt->saved_read_buf_size; | |
1237 | if (pt->read_pos < pt->read_end) | |
5c070ca7 | 1238 | return *(pt->read_pos); |
6c951427 | 1239 | } |
affc96b5 | 1240 | return scm_ptobs[SCM_PTOBNUM (port)].fill_input (port); |
6c951427 GH |
1241 | } |
1242 | ||
3cb988bd | 1243 | |
6fe692e9 MD |
1244 | /* scm_lfwrite |
1245 | * | |
53802ea8 MV |
1246 | * This function differs from scm_c_write; it updates port line and |
1247 | * column. */ | |
6fe692e9 | 1248 | |
9c44cd45 | 1249 | void |
1be6b49c | 1250 | scm_lfwrite (const char *ptr, size_t size, SCM port) |
ee149d03 | 1251 | { |
92c2555f MV |
1252 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
1253 | scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
3e2043c4 | 1254 | |
840ae05d | 1255 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1256 | scm_end_input (port); |
283a1a0e | 1257 | |
31703ab8 | 1258 | ptob->write (port, ptr, size); |
840ae05d | 1259 | |
9c44cd45 MG |
1260 | for (; size; ptr++, size--) |
1261 | update_port_lf ((scm_t_wchar) (unsigned char) *ptr, port); | |
1262 | ||
1263 | if (pt->rw_random) | |
1264 | pt->rw_active = SCM_PORT_WRITE; | |
1265 | } | |
1266 | ||
4325620f | 1267 | /* Write STR to PORT from START inclusive to END exclusive. */ |
9c44cd45 MG |
1268 | void |
1269 | scm_lfwrite_substr (SCM str, size_t start, size_t end, SCM port) | |
1270 | { | |
9c44cd45 | 1271 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
9c44cd45 MG |
1272 | |
1273 | if (pt->rw_active == SCM_PORT_READ) | |
1274 | scm_end_input (port); | |
1275 | ||
4325620f LC |
1276 | if (end == (size_t) -1) |
1277 | end = scm_i_string_length (str); | |
9c44cd45 | 1278 | |
4325620f | 1279 | scm_display (scm_c_substring (str, start, end), port); |
53802ea8 | 1280 | |
840ae05d JB |
1281 | if (pt->rw_random) |
1282 | pt->rw_active = SCM_PORT_WRITE; | |
ee149d03 | 1283 | } |
3cb988bd | 1284 | |
6fe692e9 MD |
1285 | /* scm_c_read |
1286 | * | |
1287 | * Used by an application to read arbitrary number of bytes from an | |
1288 | * SCM port. Same semantics as libc read, except that scm_c_read only | |
1289 | * returns less than SIZE bytes if at end-of-file. | |
1290 | * | |
1291 | * Warning: Doesn't update port line and column counts! */ | |
1292 | ||
b5cb4464 NJ |
1293 | /* This structure, and the following swap_buffer function, are used |
1294 | for temporarily swapping a port's own read buffer, and the buffer | |
1295 | that the caller of scm_c_read provides. */ | |
1296 | struct port_and_swap_buffer | |
1297 | { | |
1298 | scm_t_port *pt; | |
1299 | unsigned char *buffer; | |
1300 | size_t size; | |
1301 | }; | |
1302 | ||
1303 | static void | |
1304 | swap_buffer (void *data) | |
1305 | { | |
1306 | struct port_and_swap_buffer *psb = (struct port_and_swap_buffer *) data; | |
1307 | unsigned char *old_buf = psb->pt->read_buf; | |
1308 | size_t old_size = psb->pt->read_buf_size; | |
1309 | ||
1310 | /* Make the port use (buffer, size) from the struct. */ | |
1311 | psb->pt->read_pos = psb->pt->read_buf = psb->pt->read_end = psb->buffer; | |
1312 | psb->pt->read_buf_size = psb->size; | |
1313 | ||
1314 | /* Save the port's old (buffer, size) in the struct. */ | |
1315 | psb->buffer = old_buf; | |
1316 | psb->size = old_size; | |
1317 | } | |
1318 | ||
1be6b49c ML |
1319 | size_t |
1320 | scm_c_read (SCM port, void *buffer, size_t size) | |
693758d5 | 1321 | #define FUNC_NAME "scm_c_read" |
6fe692e9 | 1322 | { |
693758d5 | 1323 | scm_t_port *pt; |
1be6b49c | 1324 | size_t n_read = 0, n_available; |
b5cb4464 | 1325 | struct port_and_swap_buffer psb; |
6fe692e9 | 1326 | |
693758d5 LC |
1327 | SCM_VALIDATE_OPINPORT (1, port); |
1328 | ||
1329 | pt = SCM_PTAB_ENTRY (port); | |
6fe692e9 MD |
1330 | if (pt->rw_active == SCM_PORT_WRITE) |
1331 | scm_ptobs[SCM_PTOBNUM (port)].flush (port); | |
1332 | ||
1333 | if (pt->rw_random) | |
1334 | pt->rw_active = SCM_PORT_READ; | |
1335 | ||
b5cb4464 NJ |
1336 | /* Take bytes first from the port's read buffer. */ |
1337 | if (pt->read_pos < pt->read_end) | |
6fe692e9 | 1338 | { |
b5cb4464 | 1339 | n_available = min (size, pt->read_end - pt->read_pos); |
6fe692e9 | 1340 | memcpy (buffer, pt->read_pos, n_available); |
910d1e40 | 1341 | buffer = (char *) buffer + n_available; |
6fe692e9 MD |
1342 | pt->read_pos += n_available; |
1343 | n_read += n_available; | |
6fe692e9 | 1344 | size -= n_available; |
6fe692e9 MD |
1345 | } |
1346 | ||
b5cb4464 NJ |
1347 | /* Avoid the scm_dynwind_* costs if we now have enough data. */ |
1348 | if (size == 0) | |
1349 | return n_read; | |
1350 | ||
1351 | /* Now we will call scm_fill_input repeatedly until we have read the | |
1352 | requested number of bytes. (Note that a single scm_fill_input | |
1353 | call does not guarantee to fill the whole of the port's read | |
6d227556 | 1354 | buffer.) */ |
75192345 | 1355 | if (pt->read_buf_size <= 1 && pt->encoding == NULL) |
b5cb4464 | 1356 | { |
6d227556 NJ |
1357 | /* The port that we are reading from is unbuffered - i.e. does |
1358 | not have its own persistent buffer - but we have a buffer, | |
1359 | provided by our caller, that is the right size for the data | |
1360 | that is wanted. For the following scm_fill_input calls, | |
1361 | therefore, we use the buffer in hand as the port's read | |
1362 | buffer. | |
1363 | ||
1364 | We need to make sure that the port's normal (1 byte) buffer | |
1365 | is reinstated in case one of the scm_fill_input () calls | |
1366 | throws an exception; we use the scm_dynwind_* API to achieve | |
75192345 MG |
1367 | that. |
1368 | ||
1369 | A consequence of this optimization is that the fill_input | |
1370 | functions can't unget characters. That'll push data to the | |
1371 | pushback buffer instead of this psb buffer. */ | |
1372 | #if SCM_DEBUG == 1 | |
1373 | unsigned char *pback = pt->putback_buf; | |
1374 | #endif | |
6d227556 NJ |
1375 | psb.pt = pt; |
1376 | psb.buffer = buffer; | |
1377 | psb.size = size; | |
1378 | scm_dynwind_begin (SCM_F_DYNWIND_REWINDABLE); | |
1379 | scm_dynwind_rewind_handler (swap_buffer, &psb, SCM_F_WIND_EXPLICITLY); | |
1380 | scm_dynwind_unwind_handler (swap_buffer, &psb, SCM_F_WIND_EXPLICITLY); | |
1381 | ||
1382 | /* Call scm_fill_input until we have all the bytes that we need, | |
1383 | or we hit EOF. */ | |
1384 | while (pt->read_buf_size && (scm_fill_input (port) != EOF)) | |
1385 | { | |
1386 | pt->read_buf_size -= (pt->read_end - pt->read_pos); | |
1387 | pt->read_pos = pt->read_buf = pt->read_end; | |
1388 | } | |
75192345 MG |
1389 | #if SCM_DEBUG == 1 |
1390 | if (pback != pt->putback_buf | |
1391 | || pt->read_buf - (unsigned char *) buffer < 0) | |
1392 | scm_misc_error (FUNC_NAME, | |
1393 | "scm_c_read must not call a fill function that pushes " | |
1394 | "back characters onto an unbuffered port", SCM_EOL); | |
1395 | #endif | |
6d227556 | 1396 | n_read += pt->read_buf - (unsigned char *) buffer; |
75192345 | 1397 | |
6d227556 NJ |
1398 | /* Reinstate the port's normal buffer. */ |
1399 | scm_dynwind_end (); | |
1400 | } | |
1401 | else | |
1402 | { | |
1403 | /* The port has its own buffer. It is important that we use it, | |
1404 | even if it happens to be smaller than our caller's buffer, so | |
1405 | that a custom port implementation's entry points (in | |
1406 | particular, fill_input) can rely on the buffer always being | |
1407 | the same as they first set up. */ | |
1408 | while (size && (scm_fill_input (port) != EOF)) | |
1409 | { | |
1410 | n_available = min (size, pt->read_end - pt->read_pos); | |
1411 | memcpy (buffer, pt->read_pos, n_available); | |
1412 | buffer = (char *) buffer + n_available; | |
1413 | pt->read_pos += n_available; | |
1414 | n_read += n_available; | |
1415 | size -= n_available; | |
1416 | } | |
1417 | } | |
6fe692e9 | 1418 | |
b5cb4464 | 1419 | return n_read; |
6fe692e9 | 1420 | } |
693758d5 | 1421 | #undef FUNC_NAME |
6fe692e9 MD |
1422 | |
1423 | /* scm_c_write | |
1424 | * | |
1425 | * Used by an application to write arbitrary number of bytes to an SCM | |
1426 | * port. Similar semantics as libc write. However, unlike libc | |
1427 | * write, scm_c_write writes the requested number of bytes and has no | |
1428 | * return value. | |
1429 | * | |
1430 | * Warning: Doesn't update port line and column counts! | |
1431 | */ | |
1432 | ||
693758d5 | 1433 | void |
1be6b49c | 1434 | scm_c_write (SCM port, const void *ptr, size_t size) |
693758d5 | 1435 | #define FUNC_NAME "scm_c_write" |
6fe692e9 | 1436 | { |
693758d5 LC |
1437 | scm_t_port *pt; |
1438 | scm_t_ptob_descriptor *ptob; | |
1439 | ||
1440 | SCM_VALIDATE_OPOUTPORT (1, port); | |
1441 | ||
1442 | pt = SCM_PTAB_ENTRY (port); | |
1443 | ptob = &scm_ptobs[SCM_PTOBNUM (port)]; | |
6fe692e9 MD |
1444 | |
1445 | if (pt->rw_active == SCM_PORT_READ) | |
1446 | scm_end_input (port); | |
1447 | ||
1448 | ptob->write (port, ptr, size); | |
1449 | ||
1450 | if (pt->rw_random) | |
1451 | pt->rw_active = SCM_PORT_WRITE; | |
1452 | } | |
693758d5 | 1453 | #undef FUNC_NAME |
3cb988bd | 1454 | |
fca43887 | 1455 | void |
a284e297 | 1456 | scm_flush (SCM port) |
ee149d03 | 1457 | { |
c014a02e | 1458 | long i = SCM_PTOBNUM (port); |
7f2a6c38 | 1459 | assert (i >= 0); |
affc96b5 | 1460 | (scm_ptobs[i].flush) (port); |
ee149d03 JB |
1461 | } |
1462 | ||
283a1a0e | 1463 | void |
a284e297 | 1464 | scm_end_input (SCM port) |
283a1a0e | 1465 | { |
c014a02e | 1466 | long offset; |
92c2555f | 1467 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
283a1a0e GH |
1468 | |
1469 | if (pt->read_buf == pt->putback_buf) | |
1470 | { | |
1471 | offset = pt->read_end - pt->read_pos; | |
1472 | pt->read_buf = pt->saved_read_buf; | |
1473 | pt->read_pos = pt->saved_read_pos; | |
1474 | pt->read_end = pt->saved_read_end; | |
1475 | pt->read_buf_size = pt->saved_read_buf_size; | |
1476 | } | |
1477 | else | |
1478 | offset = 0; | |
1479 | ||
affc96b5 | 1480 | scm_ptobs[SCM_PTOBNUM (port)].end_input (port, offset); |
283a1a0e GH |
1481 | } |
1482 | ||
ee149d03 JB |
1483 | \f |
1484 | ||
1485 | ||
1486 | void | |
889975e5 MG |
1487 | scm_unget_byte (int c, SCM port) |
1488 | #define FUNC_NAME "scm_unget_byte" | |
ee149d03 | 1489 | { |
92c2555f | 1490 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
840ae05d | 1491 | |
6c951427 GH |
1492 | if (pt->read_buf == pt->putback_buf) |
1493 | /* already using the put-back buffer. */ | |
1494 | { | |
1495 | /* enlarge putback_buf if necessary. */ | |
1496 | if (pt->read_end == pt->read_buf + pt->read_buf_size | |
1497 | && pt->read_buf == pt->read_pos) | |
1498 | { | |
1be6b49c | 1499 | size_t new_size = pt->read_buf_size * 2; |
c6c79933 | 1500 | unsigned char *tmp = (unsigned char *) |
4c9419ac MV |
1501 | scm_gc_realloc (pt->putback_buf, pt->read_buf_size, new_size, |
1502 | "putback buffer"); | |
6c951427 | 1503 | |
6c951427 GH |
1504 | pt->read_pos = pt->read_buf = pt->putback_buf = tmp; |
1505 | pt->read_end = pt->read_buf + pt->read_buf_size; | |
1506 | pt->read_buf_size = pt->putback_buf_size = new_size; | |
1507 | } | |
1508 | ||
1509 | /* shift any existing bytes to buffer + 1. */ | |
1510 | if (pt->read_pos == pt->read_end) | |
1511 | pt->read_end = pt->read_buf + 1; | |
1512 | else if (pt->read_pos != pt->read_buf + 1) | |
1513 | { | |
1514 | int count = pt->read_end - pt->read_pos; | |
1515 | ||
1516 | memmove (pt->read_buf + 1, pt->read_pos, count); | |
1517 | pt->read_end = pt->read_buf + 1 + count; | |
1518 | } | |
1519 | ||
1520 | pt->read_pos = pt->read_buf; | |
1521 | } | |
1522 | else | |
1523 | /* switch to the put-back buffer. */ | |
1524 | { | |
1525 | if (pt->putback_buf == NULL) | |
1526 | { | |
c357d546 | 1527 | pt->putback_buf |
92d8fd32 LC |
1528 | = (unsigned char *) scm_gc_malloc_pointerless |
1529 | (SCM_INITIAL_PUTBACK_BUF_SIZE, "putback buffer"); | |
6c951427 GH |
1530 | pt->putback_buf_size = SCM_INITIAL_PUTBACK_BUF_SIZE; |
1531 | } | |
1532 | ||
1533 | pt->saved_read_buf = pt->read_buf; | |
1534 | pt->saved_read_pos = pt->read_pos; | |
1535 | pt->saved_read_end = pt->read_end; | |
1536 | pt->saved_read_buf_size = pt->read_buf_size; | |
1537 | ||
1538 | pt->read_pos = pt->read_buf = pt->putback_buf; | |
1539 | pt->read_end = pt->read_buf + 1; | |
1540 | pt->read_buf_size = pt->putback_buf_size; | |
1541 | } | |
1542 | ||
1543 | *pt->read_buf = c; | |
ee149d03 | 1544 | |
840ae05d JB |
1545 | if (pt->rw_random) |
1546 | pt->rw_active = SCM_PORT_READ; | |
889975e5 MG |
1547 | } |
1548 | #undef FUNC_NAME | |
1549 | ||
63479112 | 1550 | void |
889975e5 MG |
1551 | scm_ungetc (scm_t_wchar c, SCM port) |
1552 | #define FUNC_NAME "scm_ungetc" | |
1553 | { | |
1554 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
63479112 LC |
1555 | char *result; |
1556 | char result_buf[10]; | |
1557 | const char *encoding; | |
889975e5 MG |
1558 | size_t len; |
1559 | int i; | |
1560 | ||
63479112 LC |
1561 | if (pt->encoding != NULL) |
1562 | encoding = pt->encoding; | |
1563 | else | |
1564 | encoding = "ISO-8859-1"; | |
1565 | ||
1566 | len = sizeof (result_buf); | |
1567 | result = u32_conv_to_encoding (encoding, | |
1568 | (enum iconv_ilseq_handler) pt->ilseq_handler, | |
1569 | (uint32_t *) &c, 1, NULL, | |
1570 | result_buf, &len); | |
1571 | ||
1572 | if (SCM_UNLIKELY (result == NULL || len == 0)) | |
6851d3be LC |
1573 | scm_encoding_error (FUNC_NAME, errno, |
1574 | "conversion to port encoding failed", | |
1575 | SCM_BOOL_F, SCM_MAKE_CHAR (c)); | |
63479112 | 1576 | |
889975e5 | 1577 | for (i = len - 1; i >= 0; i--) |
63479112 LC |
1578 | scm_unget_byte (result[i], port); |
1579 | ||
1580 | if (SCM_UNLIKELY (result != result_buf)) | |
1581 | free (result); | |
840ae05d | 1582 | |
ee149d03 JB |
1583 | if (c == '\n') |
1584 | { | |
1585 | /* What should col be in this case? | |
1586 | * We'll leave it at -1. | |
1587 | */ | |
1588 | SCM_LINUM (port) -= 1; | |
1589 | } | |
1590 | else | |
1591 | SCM_COL(port) -= 1; | |
1592 | } | |
c6c79933 | 1593 | #undef FUNC_NAME |
ee149d03 JB |
1594 | |
1595 | ||
1596 | void | |
70d63753 | 1597 | scm_ungets (const char *s, int n, SCM port) |
ee149d03 JB |
1598 | { |
1599 | /* This is simple minded and inefficient, but unreading strings is | |
1600 | * probably not a common operation, and remember that line and | |
1601 | * column numbers have to be handled... | |
1602 | * | |
1603 | * Please feel free to write an optimized version! | |
1604 | */ | |
1605 | while (n--) | |
1606 | scm_ungetc (s[n], port); | |
1607 | } | |
1608 | ||
1609 | ||
3b3b36dd | 1610 | SCM_DEFINE (scm_peek_char, "peek-char", 0, 1, 0, |
1bbd0b84 | 1611 | (SCM port), |
1e6808ea MG |
1612 | "Return the next character available from @var{port},\n" |
1613 | "@emph{without} updating @var{port} to point to the following\n" | |
1614 | "character. If no more characters are available, the\n" | |
c2dfff19 KR |
1615 | "end-of-file object is returned.\n" |
1616 | "\n" | |
1617 | "The value returned by\n" | |
1e6808ea MG |
1618 | "a call to @code{peek-char} is the same as the value that would\n" |
1619 | "have been returned by a call to @code{read-char} on the same\n" | |
1620 | "port. The only difference is that the very next call to\n" | |
1621 | "@code{read-char} or @code{peek-char} on that @var{port} will\n" | |
1622 | "return the value returned by the preceding call to\n" | |
1623 | "@code{peek-char}. In particular, a call to @code{peek-char} on\n" | |
1624 | "an interactive port will hang waiting for input whenever a call\n" | |
c62da8f8 LC |
1625 | "to @code{read-char} would have hung.\n" |
1626 | "\n" | |
1627 | "As for @code{read-char}, a @code{decoding-error} may be raised\n" | |
1628 | "if such a situation occurs. However, unlike with @code{read-char},\n" | |
1629 | "@var{port} still points at the beginning of the erroneous byte\n" | |
1630 | "sequence when the error is raised.\n") | |
1bbd0b84 | 1631 | #define FUNC_NAME s_scm_peek_char |
ee149d03 | 1632 | { |
c62da8f8 | 1633 | int err; |
fd5eec2b LC |
1634 | SCM result; |
1635 | scm_t_wchar c; | |
1636 | char bytes[SCM_MBCHAR_BUF_SIZE]; | |
c62da8f8 | 1637 | long column, line, i; |
fd5eec2b LC |
1638 | size_t len; |
1639 | ||
ee149d03 | 1640 | if (SCM_UNBNDP (port)) |
9de87eea | 1641 | port = scm_current_input_port (); |
b2456dd4 | 1642 | SCM_VALIDATE_OPINPORT (1, port); |
fd5eec2b LC |
1643 | |
1644 | column = SCM_COL (port); | |
1645 | line = SCM_LINUM (port); | |
1646 | ||
c62da8f8 | 1647 | err = get_codepoint (port, &c, bytes, &len); |
fd5eec2b | 1648 | |
c62da8f8 LC |
1649 | for (i = len - 1; i >= 0; i--) |
1650 | scm_unget_byte (bytes[i], port); | |
fd5eec2b | 1651 | |
c62da8f8 LC |
1652 | SCM_COL (port) = column; |
1653 | SCM_LINUM (port) = line; | |
fd5eec2b | 1654 | |
c62da8f8 LC |
1655 | if (SCM_UNLIKELY (err != 0)) |
1656 | { | |
1657 | scm_decoding_error (FUNC_NAME, err, "input decoding error", port); | |
1658 | ||
1659 | /* Shouldn't happen since `catch' always aborts to prompt. */ | |
1660 | result = SCM_BOOL_F; | |
fd5eec2b | 1661 | } |
c62da8f8 LC |
1662 | else if (c == EOF) |
1663 | result = SCM_EOF_VAL; | |
1664 | else | |
1665 | result = SCM_MAKE_CHAR (c); | |
fd5eec2b LC |
1666 | |
1667 | return result; | |
3cb988bd | 1668 | } |
1bbd0b84 | 1669 | #undef FUNC_NAME |
3cb988bd | 1670 | |
1be4270a | 1671 | SCM_DEFINE (scm_unread_char, "unread-char", 1, 1, 0, |
1bbd0b84 | 1672 | (SCM cobj, SCM port), |
b380b885 MD |
1673 | "Place @var{char} in @var{port} so that it will be read by the\n" |
1674 | "next read operation. If called multiple times, the unread characters\n" | |
1675 | "will be read again in last-in first-out order. If @var{port} is\n" | |
1676 | "not supplied, the current input port is used.") | |
1bbd0b84 | 1677 | #define FUNC_NAME s_scm_unread_char |
0f2d19dd JB |
1678 | { |
1679 | int c; | |
1680 | ||
34d19ef6 | 1681 | SCM_VALIDATE_CHAR (1, cobj); |
0f2d19dd | 1682 | if (SCM_UNBNDP (port)) |
9de87eea | 1683 | port = scm_current_input_port (); |
b2456dd4 | 1684 | SCM_VALIDATE_OPINPORT (2, port); |
0f2d19dd | 1685 | |
7866a09b | 1686 | c = SCM_CHAR (cobj); |
0f2d19dd | 1687 | |
b7f3516f | 1688 | scm_ungetc (c, port); |
0f2d19dd JB |
1689 | return cobj; |
1690 | } | |
1bbd0b84 | 1691 | #undef FUNC_NAME |
0f2d19dd | 1692 | |
a1ec6916 | 1693 | SCM_DEFINE (scm_unread_string, "unread-string", 2, 0, 0, |
1bbd0b84 | 1694 | (SCM str, SCM port), |
b380b885 MD |
1695 | "Place the string @var{str} in @var{port} so that its characters will be\n" |
1696 | "read in subsequent read operations. If called multiple times, the\n" | |
1697 | "unread characters will be read again in last-in first-out order. If\n" | |
1698 | "@var{port} is not supplied, the current-input-port is used.") | |
1bbd0b84 | 1699 | #define FUNC_NAME s_scm_unread_string |
ee1e7e13 | 1700 | { |
889975e5 | 1701 | int n; |
34d19ef6 | 1702 | SCM_VALIDATE_STRING (1, str); |
ee1e7e13 | 1703 | if (SCM_UNBNDP (port)) |
9de87eea | 1704 | port = scm_current_input_port (); |
b2456dd4 | 1705 | SCM_VALIDATE_OPINPORT (2, port); |
ee1e7e13 | 1706 | |
889975e5 MG |
1707 | n = scm_i_string_length (str); |
1708 | ||
1709 | while (n--) | |
1710 | scm_ungetc (scm_i_string_ref (str, n), port); | |
ee1e7e13 MD |
1711 | |
1712 | return str; | |
1713 | } | |
1bbd0b84 | 1714 | #undef FUNC_NAME |
ee1e7e13 | 1715 | |
a1ec6916 | 1716 | SCM_DEFINE (scm_seek, "seek", 3, 0, 0, |
1e6808ea MG |
1717 | (SCM fd_port, SCM offset, SCM whence), |
1718 | "Sets the current position of @var{fd/port} to the integer\n" | |
1719 | "@var{offset}, which is interpreted according to the value of\n" | |
1720 | "@var{whence}.\n" | |
1721 | "\n" | |
1722 | "One of the following variables should be supplied for\n" | |
1723 | "@var{whence}:\n" | |
b380b885 MD |
1724 | "@defvar SEEK_SET\n" |
1725 | "Seek from the beginning of the file.\n" | |
1726 | "@end defvar\n" | |
1727 | "@defvar SEEK_CUR\n" | |
1728 | "Seek from the current position.\n" | |
1729 | "@end defvar\n" | |
1730 | "@defvar SEEK_END\n" | |
1731 | "Seek from the end of the file.\n" | |
1e6808ea MG |
1732 | "@end defvar\n" |
1733 | "If @var{fd/port} is a file descriptor, the underlying system\n" | |
1734 | "call is @code{lseek}. @var{port} may be a string port.\n" | |
1735 | "\n" | |
1736 | "The value returned is the new position in the file. This means\n" | |
1737 | "that the current position of a port can be obtained using:\n" | |
1738 | "@lisp\n" | |
b380b885 | 1739 | "(seek port 0 SEEK_CUR)\n" |
1e6808ea | 1740 | "@end lisp") |
1bbd0b84 | 1741 | #define FUNC_NAME s_scm_seek |
840ae05d | 1742 | { |
840ae05d JB |
1743 | int how; |
1744 | ||
1e6808ea | 1745 | fd_port = SCM_COERCE_OUTPORT (fd_port); |
840ae05d | 1746 | |
a55c2b68 | 1747 | how = scm_to_int (whence); |
840ae05d | 1748 | if (how != SEEK_SET && how != SEEK_CUR && how != SEEK_END) |
1bbd0b84 | 1749 | SCM_OUT_OF_RANGE (3, whence); |
23f2b9a3 | 1750 | |
0a94eb00 | 1751 | if (SCM_OPPORTP (fd_port)) |
840ae05d | 1752 | { |
92c2555f | 1753 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (fd_port); |
f1ce9199 LC |
1754 | off_t_or_off64_t off = scm_to_off_t_or_off64_t (offset); |
1755 | off_t_or_off64_t rv; | |
840ae05d JB |
1756 | |
1757 | if (!ptob->seek) | |
1bbd0b84 | 1758 | SCM_MISC_ERROR ("port is not seekable", |
1e6808ea | 1759 | scm_cons (fd_port, SCM_EOL)); |
840ae05d | 1760 | else |
1e6808ea | 1761 | rv = ptob->seek (fd_port, off, how); |
f1ce9199 | 1762 | return scm_from_off_t_or_off64_t (rv); |
840ae05d JB |
1763 | } |
1764 | else /* file descriptor?. */ | |
1765 | { | |
23f2b9a3 KR |
1766 | off_t_or_off64_t off = scm_to_off_t_or_off64_t (offset); |
1767 | off_t_or_off64_t rv; | |
1768 | rv = lseek_or_lseek64 (scm_to_int (fd_port), off, how); | |
840ae05d | 1769 | if (rv == -1) |
1bbd0b84 | 1770 | SCM_SYSERROR; |
23f2b9a3 | 1771 | return scm_from_off_t_or_off64_t (rv); |
840ae05d | 1772 | } |
840ae05d | 1773 | } |
1bbd0b84 | 1774 | #undef FUNC_NAME |
840ae05d | 1775 | |
8ab3d8a0 KR |
1776 | #ifndef O_BINARY |
1777 | #define O_BINARY 0 | |
1778 | #endif | |
1779 | ||
1780 | /* Mingw has ftruncate(), perhaps implemented above using chsize, but | |
1781 | doesn't have the filename version truncate(), hence this code. */ | |
1782 | #if HAVE_FTRUNCATE && ! HAVE_TRUNCATE | |
1783 | static int | |
1784 | truncate (const char *file, off_t length) | |
82893676 | 1785 | { |
8ab3d8a0 KR |
1786 | int ret, fdes; |
1787 | ||
1788 | fdes = open (file, O_BINARY | O_WRONLY); | |
1789 | if (fdes == -1) | |
1790 | return -1; | |
1791 | ||
1792 | ret = ftruncate (fdes, length); | |
1793 | if (ret == -1) | |
82893676 | 1794 | { |
8ab3d8a0 | 1795 | int save_errno = errno; |
82893676 | 1796 | close (fdes); |
8ab3d8a0 KR |
1797 | errno = save_errno; |
1798 | return -1; | |
82893676 | 1799 | } |
8ab3d8a0 KR |
1800 | |
1801 | return close (fdes); | |
82893676 | 1802 | } |
8ab3d8a0 | 1803 | #endif /* HAVE_FTRUNCATE && ! HAVE_TRUNCATE */ |
82893676 | 1804 | |
a1ec6916 | 1805 | SCM_DEFINE (scm_truncate_file, "truncate-file", 1, 1, 0, |
1bbd0b84 | 1806 | (SCM object, SCM length), |
8ab3d8a0 KR |
1807 | "Truncate @var{file} to @var{length} bytes. @var{file} can be a\n" |
1808 | "filename string, a port object, or an integer file descriptor.\n" | |
1809 | "The return value is unspecified.\n" | |
1810 | "\n" | |
1811 | "For a port or file descriptor @var{length} can be omitted, in\n" | |
1812 | "which case the file is truncated at the current position (per\n" | |
1813 | "@code{ftell} above).\n" | |
1814 | "\n" | |
1815 | "On most systems a file can be extended by giving a length\n" | |
1816 | "greater than the current size, but this is not mandatory in the\n" | |
1817 | "POSIX standard.") | |
1bbd0b84 | 1818 | #define FUNC_NAME s_scm_truncate_file |
840ae05d | 1819 | { |
69bc9ff3 | 1820 | int rv; |
69bc9ff3 | 1821 | |
2b829bbb KR |
1822 | /* "object" can be a port, fdes or filename. |
1823 | ||
1824 | Negative "length" makes no sense, but it's left to truncate() or | |
1825 | ftruncate() to give back an error for that (normally EINVAL). | |
1826 | */ | |
840ae05d | 1827 | |
840ae05d JB |
1828 | if (SCM_UNBNDP (length)) |
1829 | { | |
69bc9ff3 | 1830 | /* must supply length if object is a filename. */ |
7f9994d9 | 1831 | if (scm_is_string (object)) |
34d19ef6 | 1832 | SCM_MISC_ERROR("must supply length if OBJECT is a filename", SCM_EOL); |
69bc9ff3 | 1833 | |
e11e83f3 | 1834 | length = scm_seek (object, SCM_INUM0, scm_from_int (SEEK_CUR)); |
840ae05d | 1835 | } |
3fe6190f | 1836 | |
69bc9ff3 | 1837 | object = SCM_COERCE_OUTPORT (object); |
e11e83f3 | 1838 | if (scm_is_integer (object)) |
69bc9ff3 | 1839 | { |
23f2b9a3 KR |
1840 | off_t_or_off64_t c_length = scm_to_off_t_or_off64_t (length); |
1841 | SCM_SYSCALL (rv = ftruncate_or_ftruncate64 (scm_to_int (object), | |
1842 | c_length)); | |
69bc9ff3 | 1843 | } |
0c95b57d | 1844 | else if (SCM_OPOUTPORTP (object)) |
69bc9ff3 | 1845 | { |
f1ce9199 | 1846 | off_t_or_off64_t c_length = scm_to_off_t_or_off64_t (length); |
92c2555f MV |
1847 | scm_t_port *pt = SCM_PTAB_ENTRY (object); |
1848 | scm_t_ptob_descriptor *ptob = scm_ptobs + SCM_PTOBNUM (object); | |
69bc9ff3 | 1849 | |
affc96b5 | 1850 | if (!ptob->truncate) |
1bbd0b84 | 1851 | SCM_MISC_ERROR ("port is not truncatable", SCM_EOL); |
69bc9ff3 | 1852 | if (pt->rw_active == SCM_PORT_READ) |
affc96b5 | 1853 | scm_end_input (object); |
69bc9ff3 | 1854 | else if (pt->rw_active == SCM_PORT_WRITE) |
affc96b5 | 1855 | ptob->flush (object); |
69bc9ff3 | 1856 | |
affc96b5 | 1857 | ptob->truncate (object, c_length); |
69bc9ff3 GH |
1858 | rv = 0; |
1859 | } | |
1860 | else | |
1861 | { | |
2b829bbb | 1862 | off_t_or_off64_t c_length = scm_to_off_t_or_off64_t (length); |
7f9994d9 MV |
1863 | char *str = scm_to_locale_string (object); |
1864 | int eno; | |
2b829bbb | 1865 | SCM_SYSCALL (rv = truncate_or_truncate64 (str, c_length)); |
7f9994d9 MV |
1866 | eno = errno; |
1867 | free (str); | |
1868 | errno = eno; | |
69bc9ff3 GH |
1869 | } |
1870 | if (rv == -1) | |
1bbd0b84 | 1871 | SCM_SYSERROR; |
840ae05d JB |
1872 | return SCM_UNSPECIFIED; |
1873 | } | |
1bbd0b84 | 1874 | #undef FUNC_NAME |
840ae05d | 1875 | |
a1ec6916 | 1876 | SCM_DEFINE (scm_port_line, "port-line", 1, 0, 0, |
1bbd0b84 | 1877 | (SCM port), |
a150979d KR |
1878 | "Return the current line number for @var{port}.\n" |
1879 | "\n" | |
1880 | "The first line of a file is 0. But you might want to add 1\n" | |
1881 | "when printing line numbers, since starting from 1 is\n" | |
1882 | "traditional in error messages, and likely to be more natural to\n" | |
1883 | "non-programmers.") | |
1bbd0b84 | 1884 | #define FUNC_NAME s_scm_port_line |
0f2d19dd | 1885 | { |
78446828 | 1886 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1887 | SCM_VALIDATE_OPENPORT (1, port); |
651f2cd2 | 1888 | return scm_from_long (SCM_LINUM (port)); |
0f2d19dd | 1889 | } |
1bbd0b84 | 1890 | #undef FUNC_NAME |
0f2d19dd | 1891 | |
a1ec6916 | 1892 | SCM_DEFINE (scm_set_port_line_x, "set-port-line!", 2, 0, 0, |
1bbd0b84 | 1893 | (SCM port, SCM line), |
a150979d KR |
1894 | "Set the current line number for @var{port} to @var{line}. The\n" |
1895 | "first line of a file is 0.") | |
1bbd0b84 | 1896 | #define FUNC_NAME s_scm_set_port_line_x |
d043d8c2 | 1897 | { |
360fc44c | 1898 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1899 | SCM_VALIDATE_OPENPORT (1, port); |
651f2cd2 | 1900 | SCM_PTAB_ENTRY (port)->line_number = scm_to_long (line); |
564478fd | 1901 | return SCM_UNSPECIFIED; |
d043d8c2 | 1902 | } |
1bbd0b84 | 1903 | #undef FUNC_NAME |
d043d8c2 | 1904 | |
a1ec6916 | 1905 | SCM_DEFINE (scm_port_column, "port-column", 1, 0, 0, |
1bbd0b84 | 1906 | (SCM port), |
a150979d KR |
1907 | "Return the current column number of @var{port}.\n" |
1908 | "If the number is\n" | |
b380b885 MD |
1909 | "unknown, the result is #f. Otherwise, the result is a 0-origin integer\n" |
1910 | "- i.e. the first character of the first line is line 0, column 0.\n" | |
1911 | "(However, when you display a file position, for example in an error\n" | |
650a1cf9 | 1912 | "message, we recommend you add 1 to get 1-origin integers. This is\n" |
b380b885 MD |
1913 | "because lines and column numbers traditionally start with 1, and that is\n" |
1914 | "what non-programmers will find most natural.)") | |
1bbd0b84 | 1915 | #define FUNC_NAME s_scm_port_column |
0f2d19dd | 1916 | { |
78446828 | 1917 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1918 | SCM_VALIDATE_OPENPORT (1, port); |
e11e83f3 | 1919 | return scm_from_int (SCM_COL (port)); |
0f2d19dd | 1920 | } |
1bbd0b84 | 1921 | #undef FUNC_NAME |
0f2d19dd | 1922 | |
a1ec6916 | 1923 | SCM_DEFINE (scm_set_port_column_x, "set-port-column!", 2, 0, 0, |
1bbd0b84 | 1924 | (SCM port, SCM column), |
a150979d KR |
1925 | "Set the current column of @var{port}. Before reading the first\n" |
1926 | "character on a line the column should be 0.") | |
1bbd0b84 | 1927 | #define FUNC_NAME s_scm_set_port_column_x |
d043d8c2 | 1928 | { |
360fc44c | 1929 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1930 | SCM_VALIDATE_OPENPORT (1, port); |
a55c2b68 | 1931 | SCM_PTAB_ENTRY (port)->column_number = scm_to_int (column); |
564478fd | 1932 | return SCM_UNSPECIFIED; |
d043d8c2 | 1933 | } |
1bbd0b84 | 1934 | #undef FUNC_NAME |
d043d8c2 | 1935 | |
a1ec6916 | 1936 | SCM_DEFINE (scm_port_filename, "port-filename", 1, 0, 0, |
1bbd0b84 | 1937 | (SCM port), |
b380b885 | 1938 | "Return the filename associated with @var{port}. This function returns\n" |
2a2a730b | 1939 | "the strings \"standard input\", \"standard output\" and \"standard error\"\n" |
a3c8b9fc | 1940 | "when called on the current input, output and error ports respectively.") |
1bbd0b84 | 1941 | #define FUNC_NAME s_scm_port_filename |
0f2d19dd | 1942 | { |
78446828 | 1943 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1944 | SCM_VALIDATE_OPENPORT (1, port); |
b24b5e13 | 1945 | return SCM_FILENAME (port); |
0f2d19dd | 1946 | } |
1bbd0b84 | 1947 | #undef FUNC_NAME |
0f2d19dd | 1948 | |
a1ec6916 | 1949 | SCM_DEFINE (scm_set_port_filename_x, "set-port-filename!", 2, 0, 0, |
1bbd0b84 | 1950 | (SCM port, SCM filename), |
b380b885 MD |
1951 | "Change the filename associated with @var{port}, using the current input\n" |
1952 | "port if none is specified. Note that this does not change the port's\n" | |
1953 | "source of data, but only the value that is returned by\n" | |
1954 | "@code{port-filename} and reported in diagnostic output.") | |
1bbd0b84 | 1955 | #define FUNC_NAME s_scm_set_port_filename_x |
d14af9f2 | 1956 | { |
360fc44c | 1957 | port = SCM_COERCE_OUTPORT (port); |
34d19ef6 | 1958 | SCM_VALIDATE_OPENPORT (1, port); |
360fc44c | 1959 | /* We allow the user to set the filename to whatever he likes. */ |
b24b5e13 DH |
1960 | SCM_SET_FILENAME (port, filename); |
1961 | return SCM_UNSPECIFIED; | |
d14af9f2 | 1962 | } |
1bbd0b84 | 1963 | #undef FUNC_NAME |
d14af9f2 | 1964 | |
d6a6989e LC |
1965 | /* A fluid specifying the default encoding for newly created ports. If it is |
1966 | a string, that is the encoding. If it is #f, it is in the "native" | |
1967 | (Latin-1) encoding. */ | |
1968 | SCM_VARIABLE (default_port_encoding_var, "%default-port-encoding"); | |
1969 | ||
889975e5 MG |
1970 | static int scm_port_encoding_init = 0; |
1971 | ||
9d9c66ba LC |
1972 | /* Use ENCODING as the default encoding for future ports. */ |
1973 | void | |
1974 | scm_i_set_default_port_encoding (const char *encoding) | |
1975 | { | |
1976 | if (!scm_port_encoding_init | |
1977 | || !scm_is_fluid (SCM_VARIABLE_REF (default_port_encoding_var))) | |
1978 | scm_misc_error (NULL, "tried to set port encoding fluid before it is initialized", | |
1979 | SCM_EOL); | |
1980 | ||
1981 | if (encoding == NULL | |
1982 | || !strcmp (encoding, "ASCII") | |
1983 | || !strcmp (encoding, "ANSI_X3.4-1968") | |
1984 | || !strcmp (encoding, "ISO-8859-1")) | |
1985 | scm_fluid_set_x (SCM_VARIABLE_REF (default_port_encoding_var), SCM_BOOL_F); | |
1986 | else | |
1987 | scm_fluid_set_x (SCM_VARIABLE_REF (default_port_encoding_var), | |
1988 | scm_from_locale_string (encoding)); | |
1989 | } | |
1990 | ||
1991 | /* Return the name of the default encoding for newly created ports; a | |
1992 | return value of NULL means "ISO-8859-1". */ | |
889975e5 | 1993 | const char * |
9d9c66ba | 1994 | scm_i_default_port_encoding (void) |
889975e5 | 1995 | { |
9d9c66ba LC |
1996 | if (!scm_port_encoding_init) |
1997 | return NULL; | |
1998 | else if (!scm_is_fluid (SCM_VARIABLE_REF (default_port_encoding_var))) | |
1999 | return NULL; | |
2000 | else | |
889975e5 | 2001 | { |
9d9c66ba LC |
2002 | SCM encoding; |
2003 | ||
2004 | encoding = scm_fluid_ref (SCM_VARIABLE_REF (default_port_encoding_var)); | |
2005 | if (!scm_is_string (encoding)) | |
889975e5 MG |
2006 | return NULL; |
2007 | else | |
9d9c66ba | 2008 | return scm_i_string_chars (encoding); |
889975e5 MG |
2009 | } |
2010 | } | |
2011 | ||
889975e5 | 2012 | void |
064c27c4 | 2013 | scm_i_set_port_encoding_x (SCM port, const char *encoding) |
889975e5 | 2014 | { |
889975e5 | 2015 | scm_t_port *pt; |
9d9c66ba | 2016 | iconv_t new_input_cd, new_output_cd; |
889975e5 | 2017 | |
9d9c66ba LC |
2018 | new_input_cd = (iconv_t) -1; |
2019 | new_output_cd = (iconv_t) -1; | |
f4bc4e59 | 2020 | |
9d9c66ba LC |
2021 | /* Set the character encoding for this port. */ |
2022 | pt = SCM_PTAB_ENTRY (port); | |
f4bc4e59 | 2023 | |
9d9c66ba LC |
2024 | if (encoding == NULL) |
2025 | encoding = "ISO-8859-1"; | |
f4bc4e59 | 2026 | |
9d9c66ba | 2027 | pt->encoding = scm_gc_strdup (encoding, "port"); |
d9544bf0 | 2028 | |
9d9c66ba LC |
2029 | if (SCM_CELL_WORD_0 (port) & SCM_RDNG) |
2030 | { | |
2031 | /* Open an input iconv conversion descriptor, from ENCODING | |
2032 | to UTF-8. We choose UTF-8, not UTF-32, because iconv | |
2033 | implementations can typically convert from anything to | |
2034 | UTF-8, but not to UTF-32 (see | |
2035 | <http://lists.gnu.org/archive/html/bug-libunistring/2010-09/msg00007.html>). */ | |
2036 | new_input_cd = iconv_open ("UTF-8", encoding); | |
2037 | if (new_input_cd == (iconv_t) -1) | |
2038 | goto invalid_encoding; | |
2039 | } | |
f4bc4e59 | 2040 | |
9d9c66ba LC |
2041 | if (SCM_CELL_WORD_0 (port) & SCM_WRTNG) |
2042 | { | |
2043 | new_output_cd = iconv_open (encoding, "UTF-8"); | |
2044 | if (new_output_cd == (iconv_t) -1) | |
f4bc4e59 | 2045 | { |
9d9c66ba LC |
2046 | if (new_input_cd != (iconv_t) -1) |
2047 | iconv_close (new_input_cd); | |
2048 | goto invalid_encoding; | |
f4bc4e59 | 2049 | } |
9d9c66ba | 2050 | } |
f4bc4e59 | 2051 | |
9d9c66ba LC |
2052 | if (pt->input_cd != (iconv_t) -1) |
2053 | iconv_close (pt->input_cd); | |
2054 | if (pt->output_cd != (iconv_t) -1) | |
2055 | iconv_close (pt->output_cd); | |
f4bc4e59 | 2056 | |
9d9c66ba LC |
2057 | pt->input_cd = new_input_cd; |
2058 | pt->output_cd = new_output_cd; | |
f4bc4e59 LC |
2059 | |
2060 | return; | |
2061 | ||
2062 | invalid_encoding: | |
2063 | { | |
2064 | SCM err; | |
064c27c4 LC |
2065 | err = scm_from_locale_string (encoding); |
2066 | scm_misc_error ("scm_i_set_port_encoding_x", | |
2067 | "invalid or unknown character encoding ~s", | |
f4bc4e59 LC |
2068 | scm_list_1 (err)); |
2069 | } | |
889975e5 MG |
2070 | } |
2071 | ||
2072 | SCM_DEFINE (scm_port_encoding, "port-encoding", 1, 0, 0, | |
2073 | (SCM port), | |
2074 | "Returns, as a string, the character encoding that @var{port}\n" | |
2075 | "uses to interpret its input and output.\n") | |
2076 | #define FUNC_NAME s_scm_port_encoding | |
2077 | { | |
2078 | scm_t_port *pt; | |
2079 | const char *enc; | |
2080 | ||
2081 | SCM_VALIDATE_PORT (1, port); | |
2082 | ||
2083 | pt = SCM_PTAB_ENTRY (port); | |
9d9c66ba | 2084 | enc = pt->encoding; |
889975e5 MG |
2085 | if (enc) |
2086 | return scm_from_locale_string (pt->encoding); | |
2087 | else | |
0af34a3f | 2088 | return SCM_BOOL_F; |
889975e5 MG |
2089 | } |
2090 | #undef FUNC_NAME | |
d6a6989e | 2091 | |
889975e5 MG |
2092 | SCM_DEFINE (scm_set_port_encoding_x, "set-port-encoding!", 2, 0, 0, |
2093 | (SCM port, SCM enc), | |
2094 | "Sets the character encoding that will be used to interpret all\n" | |
2095 | "port I/O. New ports are created with the encoding\n" | |
2096 | "appropriate for the current locale if @code{setlocale} has \n" | |
2097 | "been called or ISO-8859-1 otherwise\n" | |
2098 | "and this procedure can be used to modify that encoding.\n") | |
889975e5 MG |
2099 | #define FUNC_NAME s_scm_set_port_encoding_x |
2100 | { | |
2101 | char *enc_str; | |
889975e5 MG |
2102 | |
2103 | SCM_VALIDATE_PORT (1, port); | |
2104 | SCM_VALIDATE_STRING (2, enc); | |
2105 | ||
2106 | enc_str = scm_to_locale_string (enc); | |
da288f50 LC |
2107 | scm_i_set_port_encoding_x (port, enc_str); |
2108 | ||
889975e5 MG |
2109 | return SCM_UNSPECIFIED; |
2110 | } | |
2111 | #undef FUNC_NAME | |
2112 | ||
2113 | ||
2114 | /* This determines how conversions handle unconvertible characters. */ | |
2115 | SCM_GLOBAL_VARIABLE (scm_conversion_strategy, "%port-conversion-strategy"); | |
2116 | static int scm_conversion_strategy_init = 0; | |
2117 | ||
2118 | scm_t_string_failed_conversion_handler | |
2119 | scm_i_get_conversion_strategy (SCM port) | |
2120 | { | |
2121 | SCM encoding; | |
2122 | ||
2123 | if (scm_is_false (port)) | |
2124 | { | |
2125 | if (!scm_conversion_strategy_init | |
2126 | || !scm_is_fluid (SCM_VARIABLE_REF (scm_conversion_strategy))) | |
2127 | return SCM_FAILED_CONVERSION_QUESTION_MARK; | |
2128 | else | |
2129 | { | |
2130 | encoding = scm_fluid_ref (SCM_VARIABLE_REF (scm_conversion_strategy)); | |
2131 | if (scm_is_false (encoding)) | |
2132 | return SCM_FAILED_CONVERSION_QUESTION_MARK; | |
2133 | else | |
2134 | return (scm_t_string_failed_conversion_handler) scm_to_int (encoding); | |
2135 | } | |
2136 | } | |
2137 | else | |
2138 | { | |
2139 | scm_t_port *pt; | |
2140 | pt = SCM_PTAB_ENTRY (port); | |
e1ee45e7 | 2141 | return pt->ilseq_handler; |
889975e5 MG |
2142 | } |
2143 | ||
2144 | } | |
2145 | ||
2146 | void | |
2147 | scm_i_set_conversion_strategy_x (SCM port, | |
2148 | scm_t_string_failed_conversion_handler handler) | |
2149 | { | |
2150 | SCM strategy; | |
2151 | scm_t_port *pt; | |
2152 | ||
2153 | strategy = scm_from_int ((int) handler); | |
2154 | ||
2155 | if (scm_is_false (port)) | |
2156 | { | |
2157 | /* Set the default encoding for future ports. */ | |
2158 | if (!scm_conversion_strategy | |
2159 | || !scm_is_fluid (SCM_VARIABLE_REF (scm_conversion_strategy))) | |
2160 | scm_misc_error (NULL, "tried to set conversion strategy fluid before it is initialized", | |
2161 | SCM_EOL); | |
2162 | scm_fluid_set_x (SCM_VARIABLE_REF (scm_conversion_strategy), strategy); | |
2163 | } | |
2164 | else | |
2165 | { | |
2166 | /* Set the character encoding for this port. */ | |
2167 | pt = SCM_PTAB_ENTRY (port); | |
2168 | pt->ilseq_handler = handler; | |
2169 | } | |
2170 | } | |
2171 | ||
2172 | SCM_DEFINE (scm_port_conversion_strategy, "port-conversion-strategy", | |
2173 | 1, 0, 0, (SCM port), | |
2174 | "Returns the behavior of the port when handling a character that\n" | |
2175 | "is not representable in the port's current encoding.\n" | |
2176 | "It returns the symbol @code{error} if unrepresentable characters\n" | |
2177 | "should cause exceptions, @code{substitute} if the port should\n" | |
2178 | "try to replace unrepresentable characters with question marks or\n" | |
2179 | "approximate characters, or @code{escape} if unrepresentable\n" | |
2180 | "characters should be converted to string escapes.\n" | |
2181 | "\n" | |
2182 | "If @var{port} is @code{#f}, then the current default behavior\n" | |
2183 | "will be returned. New ports will have this default behavior\n" | |
2184 | "when they are created.\n") | |
2185 | #define FUNC_NAME s_scm_port_conversion_strategy | |
2186 | { | |
2187 | scm_t_string_failed_conversion_handler h; | |
2188 | ||
2189 | SCM_VALIDATE_OPPORT (1, port); | |
2190 | ||
2191 | if (!scm_is_false (port)) | |
2192 | { | |
2193 | SCM_VALIDATE_OPPORT (1, port); | |
2194 | } | |
2195 | ||
2196 | h = scm_i_get_conversion_strategy (port); | |
2197 | if (h == SCM_FAILED_CONVERSION_ERROR) | |
4a655e50 | 2198 | return scm_from_latin1_symbol ("error"); |
889975e5 | 2199 | else if (h == SCM_FAILED_CONVERSION_QUESTION_MARK) |
4a655e50 | 2200 | return scm_from_latin1_symbol ("substitute"); |
889975e5 | 2201 | else if (h == SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE) |
4a655e50 | 2202 | return scm_from_latin1_symbol ("escape"); |
889975e5 MG |
2203 | else |
2204 | abort (); | |
2205 | ||
2206 | /* Never gets here. */ | |
2207 | return SCM_UNDEFINED; | |
2208 | } | |
2209 | #undef FUNC_NAME | |
2210 | ||
2211 | SCM_DEFINE (scm_set_port_conversion_strategy_x, "set-port-conversion-strategy!", | |
2212 | 2, 0, 0, | |
2213 | (SCM port, SCM sym), | |
2214 | "Sets the behavior of the interpreter when outputting a character\n" | |
2215 | "that is not representable in the port's current encoding.\n" | |
2216 | "@var{sym} can be either @code{'error}, @code{'substitute}, or\n" | |
2217 | "@code{'escape}. If it is @code{'error}, an error will be thrown\n" | |
2218 | "when an unconvertible character is encountered. If it is\n" | |
2219 | "@code{'substitute}, then unconvertible characters will \n" | |
2220 | "be replaced with approximate characters, or with question marks\n" | |
2221 | "if no approximately correct character is available.\n" | |
2222 | "If it is @code{'escape},\n" | |
2223 | "it will appear as a hex escape when output.\n" | |
2224 | "\n" | |
2225 | "If @var{port} is an open port, the conversion error behavior\n" | |
2226 | "is set for that port. If it is @code{#f}, it is set as the\n" | |
2227 | "default behavior for any future ports that get created in\n" | |
2228 | "this thread.\n") | |
2229 | #define FUNC_NAME s_scm_set_port_conversion_strategy_x | |
2230 | { | |
2231 | SCM err; | |
2232 | SCM qm; | |
2233 | SCM esc; | |
2234 | ||
2235 | if (!scm_is_false (port)) | |
2236 | { | |
2237 | SCM_VALIDATE_OPPORT (1, port); | |
2238 | } | |
2239 | ||
4a655e50 | 2240 | err = scm_from_latin1_symbol ("error"); |
889975e5 MG |
2241 | if (scm_is_true (scm_eqv_p (sym, err))) |
2242 | { | |
2243 | scm_i_set_conversion_strategy_x (port, SCM_FAILED_CONVERSION_ERROR); | |
2244 | return SCM_UNSPECIFIED; | |
2245 | } | |
2246 | ||
4a655e50 | 2247 | qm = scm_from_latin1_symbol ("substitute"); |
889975e5 MG |
2248 | if (scm_is_true (scm_eqv_p (sym, qm))) |
2249 | { | |
2250 | scm_i_set_conversion_strategy_x (port, | |
2251 | SCM_FAILED_CONVERSION_QUESTION_MARK); | |
2252 | return SCM_UNSPECIFIED; | |
2253 | } | |
2254 | ||
4a655e50 | 2255 | esc = scm_from_latin1_symbol ("escape"); |
889975e5 MG |
2256 | if (scm_is_true (scm_eqv_p (sym, esc))) |
2257 | { | |
2258 | scm_i_set_conversion_strategy_x (port, | |
2259 | SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE); | |
2260 | return SCM_UNSPECIFIED; | |
2261 | } | |
2262 | ||
2263 | SCM_MISC_ERROR ("unknown conversion behavior ~s", scm_list_1 (sym)); | |
2264 | ||
2265 | return SCM_UNSPECIFIED; | |
2266 | } | |
2267 | #undef FUNC_NAME | |
2268 | ||
2269 | ||
2270 | ||
f12733c9 MD |
2271 | void |
2272 | scm_print_port_mode (SCM exp, SCM port) | |
2273 | { | |
2274 | scm_puts (SCM_CLOSEDP (exp) | |
2275 | ? "closed: " | |
f9a64404 DH |
2276 | : (SCM_RDNG & SCM_CELL_WORD_0 (exp) |
2277 | ? (SCM_WRTNG & SCM_CELL_WORD_0 (exp) | |
f12733c9 MD |
2278 | ? "input-output: " |
2279 | : "input: ") | |
f9a64404 | 2280 | : (SCM_WRTNG & SCM_CELL_WORD_0 (exp) |
f12733c9 MD |
2281 | ? "output: " |
2282 | : "bogus: ")), | |
2283 | port); | |
2284 | } | |
1cc91f1b | 2285 | |
f12733c9 | 2286 | int |
e81d98ec | 2287 | scm_port_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 2288 | { |
f12733c9 MD |
2289 | char *type = SCM_PTOBNAME (SCM_PTOBNUM (exp)); |
2290 | if (!type) | |
2291 | type = "port"; | |
b7f3516f | 2292 | scm_puts ("#<", port); |
f12733c9 | 2293 | scm_print_port_mode (exp, port); |
b7f3516f TT |
2294 | scm_puts (type, port); |
2295 | scm_putc (' ', port); | |
0345e278 | 2296 | scm_uintprint (SCM_CELL_WORD_1 (exp), 16, port); |
b7f3516f | 2297 | scm_putc ('>', port); |
f12733c9 | 2298 | return 1; |
0f2d19dd JB |
2299 | } |
2300 | ||
0f2d19dd | 2301 | \f |
ee149d03 | 2302 | |
d68fee48 | 2303 | /* Void ports. */ |
0f2d19dd | 2304 | |
92c2555f | 2305 | scm_t_bits scm_tc16_void_port = 0; |
0f2d19dd | 2306 | |
e81d98ec | 2307 | static int fill_input_void_port (SCM port SCM_UNUSED) |
283a1a0e | 2308 | { |
70df8af6 | 2309 | return EOF; |
283a1a0e GH |
2310 | } |
2311 | ||
31703ab8 | 2312 | static void |
e81d98ec DH |
2313 | write_void_port (SCM port SCM_UNUSED, |
2314 | const void *data SCM_UNUSED, | |
2315 | size_t size SCM_UNUSED) | |
31703ab8 GH |
2316 | { |
2317 | } | |
2318 | ||
d617ee18 MV |
2319 | static SCM |
2320 | scm_i_void_port (long mode_bits) | |
0f2d19dd | 2321 | { |
9de87eea | 2322 | scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex); |
402788a9 | 2323 | { |
da220f27 HWN |
2324 | SCM answer = scm_new_port_table_entry (scm_tc16_void_port); |
2325 | scm_t_port * pt = SCM_PTAB_ENTRY(answer); | |
2326 | ||
402788a9 | 2327 | scm_port_non_buffer (pt); |
402788a9 HWN |
2328 | |
2329 | SCM_SETSTREAM (answer, 0); | |
2330 | SCM_SET_CELL_TYPE (answer, scm_tc16_void_port | mode_bits); | |
9de87eea | 2331 | scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex); |
402788a9 HWN |
2332 | return answer; |
2333 | } | |
0f2d19dd JB |
2334 | } |
2335 | ||
d617ee18 MV |
2336 | SCM |
2337 | scm_void_port (char *mode_str) | |
2338 | { | |
2339 | return scm_i_void_port (scm_mode_bits (mode_str)); | |
2340 | } | |
2341 | ||
a1ec6916 | 2342 | SCM_DEFINE (scm_sys_make_void_port, "%make-void-port", 1, 0, 0, |
1bbd0b84 | 2343 | (SCM mode), |
70df8af6 | 2344 | "Create and return a new void port. A void port acts like\n" |
bb2c02f2 | 2345 | "@file{/dev/null}. The @var{mode} argument\n" |
70df8af6 | 2346 | "specifies the input/output modes for this port: see the\n" |
b380b885 | 2347 | "documentation for @code{open-file} in @ref{File Ports}.") |
1bbd0b84 | 2348 | #define FUNC_NAME s_scm_sys_make_void_port |
0f2d19dd | 2349 | { |
d617ee18 | 2350 | return scm_i_void_port (scm_i_mode_bits (mode)); |
0f2d19dd | 2351 | } |
1bbd0b84 | 2352 | #undef FUNC_NAME |
0f2d19dd | 2353 | |
0f2d19dd | 2354 | \f |
89545eba | 2355 | /* Initialization. */ |
1cc91f1b | 2356 | |
0f2d19dd JB |
2357 | void |
2358 | scm_init_ports () | |
0f2d19dd | 2359 | { |
840ae05d | 2360 | /* lseek() symbols. */ |
e11e83f3 MV |
2361 | scm_c_define ("SEEK_SET", scm_from_int (SEEK_SET)); |
2362 | scm_c_define ("SEEK_CUR", scm_from_int (SEEK_CUR)); | |
2363 | scm_c_define ("SEEK_END", scm_from_int (SEEK_END)); | |
840ae05d | 2364 | |
70df8af6 GH |
2365 | scm_tc16_void_port = scm_make_port_type ("void", fill_input_void_port, |
2366 | write_void_port); | |
9de87eea | 2367 | |
f39448c5 AW |
2368 | cur_inport_fluid = scm_make_fluid (); |
2369 | cur_outport_fluid = scm_make_fluid (); | |
2370 | cur_errport_fluid = scm_make_fluid (); | |
2371 | cur_loadport_fluid = scm_make_fluid (); | |
9de87eea | 2372 | |
f39448c5 | 2373 | scm_i_port_weak_hash = scm_make_weak_key_hash_table (SCM_I_MAKINUM(31)); |
d6a6989e | 2374 | |
a0599745 | 2375 | #include "libguile/ports.x" |
889975e5 | 2376 | |
d6a6989e LC |
2377 | /* Use Latin-1 as the default port encoding. */ |
2378 | SCM_VARIABLE_SET (default_port_encoding_var, scm_make_fluid ()); | |
2379 | scm_fluid_set_x (SCM_VARIABLE_REF (default_port_encoding_var), SCM_BOOL_F); | |
889975e5 | 2380 | scm_port_encoding_init = 1; |
d6a6989e | 2381 | |
889975e5 MG |
2382 | SCM_VARIABLE_SET (scm_conversion_strategy, scm_make_fluid ()); |
2383 | scm_fluid_set_x (SCM_VARIABLE_REF (scm_conversion_strategy), | |
2384 | scm_from_int ((int) SCM_FAILED_CONVERSION_QUESTION_MARK)); | |
2385 | scm_conversion_strategy_init = 1; | |
2386 | ||
0f2d19dd | 2387 | } |
89e00824 ML |
2388 | |
2389 | /* | |
2390 | Local Variables: | |
2391 | c-file-style: "gnu" | |
2392 | End: | |
2393 | */ |