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