Commit | Line | Data |
---|---|---|
3d7f708f | 1 | /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2002 Free Software Foundation, Inc. |
0f2d19dd | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
0f2d19dd | 7 | * |
73be1d9e MV |
8 | * This library is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 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 | |
15 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
16 | */ | |
1bbd0b84 | 17 | |
1bbd0b84 | 18 | |
0f2d19dd | 19 | \f |
85286595 RB |
20 | #if HAVE_CONFIG_H |
21 | # include <config.h> | |
22 | #endif | |
0f2d19dd JB |
23 | |
24 | #include <stdio.h> | |
cb63cf9e | 25 | #include <fcntl.h> |
a0599745 MD |
26 | #include "libguile/_scm.h" |
27 | #include "libguile/strings.h" | |
a0599745 | 28 | #include "libguile/validate.h" |
6b72ac1d GH |
29 | #include "libguile/gc.h" |
30 | ||
a0599745 | 31 | #include "libguile/fports.h" |
95b88819 GH |
32 | |
33 | #ifdef HAVE_STRING_H | |
34 | #include <string.h> | |
35 | #endif | |
0f2d19dd JB |
36 | #ifdef HAVE_UNISTD_H |
37 | #include <unistd.h> | |
38 | #else | |
1be6b49c | 39 | size_t fwrite (); |
0f2d19dd | 40 | #endif |
b8b17bfd MV |
41 | #ifdef HAVE_IO_H |
42 | #include <io.h> | |
43 | #endif | |
f47a5239 | 44 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE |
cb63cf9e JB |
45 | #include <sys/stat.h> |
46 | #endif | |
0f2d19dd | 47 | |
cb63cf9e | 48 | #include <errno.h> |
e145dd02 | 49 | |
a0599745 | 50 | #include "libguile/iselect.h" |
edb810bb SJ |
51 | |
52 | /* Some defines for Windows (native port, not Cygwin). */ | |
82893676 MG |
53 | #ifdef __MINGW32__ |
54 | # include <sys/stat.h> | |
55 | # include <winsock2.h> | |
56 | # define ftruncate(fd, size) chsize (fd, size) | |
57 | #endif /* __MINGW32__ */ | |
cb63cf9e | 58 | |
a98bddfd | 59 | |
92c2555f | 60 | scm_t_bits scm_tc16_fport; |
a98bddfd DH |
61 | |
62 | ||
19b27fa2 | 63 | /* default buffer size, used if the O/S won't supply a value. */ |
1be6b49c | 64 | static const size_t default_buffer_size = 1024; |
19b27fa2 | 65 | |
cb63cf9e JB |
66 | /* create FPORT buffer with specified sizes (or -1 to use default size or |
67 | 0 for no buffer. */ | |
68 | static void | |
c014a02e | 69 | scm_fport_buffer_add (SCM port, long read_size, int write_size) |
c6c79933 | 70 | #define FUNC_NAME "scm_fport_buffer_add" |
e145dd02 | 71 | { |
92c2555f | 72 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
e145dd02 | 73 | |
cb63cf9e JB |
74 | if (read_size == -1 || write_size == -1) |
75 | { | |
1be6b49c | 76 | size_t default_size; |
f47a5239 | 77 | #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE |
cb63cf9e | 78 | struct stat st; |
b8b17bfd | 79 | scm_t_fport *fp = SCM_FSTREAM (port); |
cb63cf9e | 80 | |
19b27fa2 GH |
81 | default_size = (fstat (fp->fdes, &st) == -1) ? default_buffer_size |
82 | : st.st_blksize; | |
cb63cf9e | 83 | #else |
19b27fa2 | 84 | default_size = default_buffer_size; |
cb63cf9e JB |
85 | #endif |
86 | if (read_size == -1) | |
87 | read_size = default_size; | |
88 | if (write_size == -1) | |
89 | write_size = default_size; | |
90 | } | |
0f2d19dd | 91 | |
f5f2dcff | 92 | if (SCM_INPUT_PORT_P (port) && read_size > 0) |
cb63cf9e | 93 | { |
4c9419ac | 94 | pt->read_buf = scm_gc_malloc (read_size, "port buffer"); |
cb63cf9e JB |
95 | pt->read_pos = pt->read_end = pt->read_buf; |
96 | pt->read_buf_size = read_size; | |
97 | } | |
98 | else | |
99 | { | |
840ae05d | 100 | pt->read_pos = pt->read_buf = pt->read_end = &pt->shortbuf; |
cb63cf9e JB |
101 | pt->read_buf_size = 1; |
102 | } | |
1717856b | 103 | |
f5f2dcff | 104 | if (SCM_OUTPUT_PORT_P (port) && write_size > 0) |
cb63cf9e | 105 | { |
4c9419ac | 106 | pt->write_buf = scm_gc_malloc (write_size, "port buffer"); |
cb63cf9e JB |
107 | pt->write_pos = pt->write_buf; |
108 | pt->write_buf_size = write_size; | |
109 | } | |
110 | else | |
111 | { | |
112 | pt->write_buf = pt->write_pos = &pt->shortbuf; | |
113 | pt->write_buf_size = 1; | |
114 | } | |
115 | ||
116 | pt->write_end = pt->write_buf + pt->write_buf_size; | |
117 | if (read_size > 0 || write_size > 0) | |
54778cd3 | 118 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) & ~SCM_BUF0); |
cb63cf9e | 119 | else |
54778cd3 | 120 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) | SCM_BUF0); |
7a6f1ffa | 121 | } |
c6c79933 | 122 | #undef FUNC_NAME |
7a6f1ffa | 123 | |
a1ec6916 | 124 | SCM_DEFINE (scm_setvbuf, "setvbuf", 2, 1, 0, |
1bbd0b84 | 125 | (SCM port, SCM mode, SCM size), |
fc0d72d4 MD |
126 | "Set the buffering mode for @var{port}. @var{mode} can be:\n" |
127 | "@table @code\n" | |
128 | "@item _IONBF\n" | |
129 | "non-buffered\n" | |
130 | "@item _IOLBF\n" | |
131 | "line buffered\n" | |
132 | "@item _IOFBF\n" | |
133 | "block buffered, using a newly allocated buffer of @var{size} bytes.\n" | |
134 | "If @var{size} is omitted, a default size will be used.\n" | |
2c1ae20e | 135 | "@end table") |
1bbd0b84 | 136 | #define FUNC_NAME s_scm_setvbuf |
7a6f1ffa | 137 | { |
1be6b49c | 138 | int cmode; |
c014a02e | 139 | long csize; |
92c2555f | 140 | scm_t_port *pt; |
7a6f1ffa | 141 | |
78446828 MV |
142 | port = SCM_COERCE_OUTPORT (port); |
143 | ||
3b3b36dd GB |
144 | SCM_VALIDATE_OPFPORT (1,port); |
145 | SCM_VALIDATE_INUM_COPY (2,mode,cmode); | |
d3639214 | 146 | if (cmode != _IONBF && cmode != _IOFBF && cmode != _IOLBF) |
1bbd0b84 | 147 | scm_out_of_range (FUNC_NAME, mode); |
d3639214 GH |
148 | |
149 | if (cmode == _IOLBF) | |
150 | { | |
54778cd3 | 151 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) | SCM_BUFLINE); |
d3639214 GH |
152 | cmode = _IOFBF; |
153 | } | |
154 | else | |
155 | { | |
54778cd3 | 156 | SCM_SET_CELL_WORD_0 (port, SCM_CELL_WORD_0 (port) ^ SCM_BUFLINE); |
d3639214 GH |
157 | } |
158 | ||
7a6f1ffa | 159 | if (SCM_UNBNDP (size)) |
cb63cf9e JB |
160 | { |
161 | if (cmode == _IOFBF) | |
162 | csize = -1; | |
163 | else | |
164 | csize = 0; | |
165 | } | |
7a6f1ffa GH |
166 | else |
167 | { | |
3b3b36dd | 168 | SCM_VALIDATE_INUM_COPY (3,size,csize); |
cb63cf9e | 169 | if (csize < 0 || (cmode == _IONBF && csize > 0)) |
1bbd0b84 | 170 | scm_out_of_range (FUNC_NAME, size); |
7a6f1ffa | 171 | } |
d3639214 | 172 | |
cb63cf9e | 173 | pt = SCM_PTAB_ENTRY (port); |
7a6f1ffa | 174 | |
4c9419ac MV |
175 | /* silently discards buffered and put-back chars. */ |
176 | if (pt->read_buf == pt->putback_buf) | |
177 | { | |
178 | pt->read_buf = pt->saved_read_buf; | |
179 | pt->read_pos = pt->saved_read_pos; | |
180 | pt->read_end = pt->saved_read_end; | |
181 | pt->read_buf_size = pt->saved_read_buf_size; | |
182 | } | |
cb63cf9e | 183 | if (pt->read_buf != &pt->shortbuf) |
4c9419ac | 184 | scm_gc_free (pt->read_buf, pt->read_buf_size, "port buffer"); |
cb63cf9e | 185 | if (pt->write_buf != &pt->shortbuf) |
4c9419ac | 186 | scm_gc_free (pt->write_buf, pt->write_buf_size, "port buffer"); |
7a6f1ffa | 187 | |
cb63cf9e JB |
188 | scm_fport_buffer_add (port, csize, csize); |
189 | return SCM_UNSPECIFIED; | |
0f2d19dd | 190 | } |
1bbd0b84 | 191 | #undef FUNC_NAME |
0f2d19dd | 192 | |
eadd48de | 193 | /* Move ports with the specified file descriptor to new descriptors, |
387d418c | 194 | * resetting the revealed count to 0. |
0f2d19dd | 195 | */ |
1717856b | 196 | |
eadd48de | 197 | void |
6e8d25a6 | 198 | scm_evict_ports (int fd) |
0f2d19dd | 199 | { |
c014a02e | 200 | long i; |
0f2d19dd | 201 | |
67329a9e | 202 | for (i = 0; i < scm_i_port_table_size; i++) |
eadd48de | 203 | { |
67329a9e | 204 | SCM port = scm_i_port_table[i]->port; |
cb63cf9e JB |
205 | |
206 | if (SCM_FPORTP (port)) | |
eadd48de | 207 | { |
92c2555f | 208 | scm_t_fport *fp = SCM_FSTREAM (port); |
cb63cf9e JB |
209 | |
210 | if (fp->fdes == fd) | |
211 | { | |
212 | fp->fdes = dup (fd); | |
213 | if (fp->fdes == -1) | |
214 | scm_syserror ("scm_evict_ports"); | |
215 | scm_set_port_revealed_x (port, SCM_MAKINUM (0)); | |
216 | } | |
eadd48de GH |
217 | } |
218 | } | |
219 | } | |
0f2d19dd | 220 | |
efa40607 DH |
221 | |
222 | SCM_DEFINE (scm_file_port_p, "file-port?", 1, 0, 0, | |
223 | (SCM obj), | |
2069af38 | 224 | "Determine whether @var{obj} is a port that is related to a file.") |
efa40607 DH |
225 | #define FUNC_NAME s_scm_file_port_p |
226 | { | |
227 | return SCM_BOOL (SCM_FPORTP (obj)); | |
228 | } | |
229 | #undef FUNC_NAME | |
230 | ||
231 | ||
0f2d19dd JB |
232 | /* scm_open_file |
233 | * Return a new port open on a given file. | |
234 | * | |
235 | * The mode string must match the pattern: [rwa+]** which | |
236 | * is interpreted in the usual unix way. | |
237 | * | |
238 | * Return the new port. | |
239 | */ | |
3b3b36dd | 240 | SCM_DEFINE (scm_open_file, "open-file", 2, 0, 0, |
1e6808ea MG |
241 | (SCM filename, SCM mode), |
242 | "Open the file whose name is @var{filename}, and return a port\n" | |
fc0d72d4 | 243 | "representing that file. The attributes of the port are\n" |
1e6808ea MG |
244 | "determined by the @var{mode} string. The way in which this is\n" |
245 | "interpreted is similar to C stdio. The first character must be\n" | |
246 | "one of the following:\n" | |
fc0d72d4 MD |
247 | "@table @samp\n" |
248 | "@item r\n" | |
249 | "Open an existing file for input.\n" | |
250 | "@item w\n" | |
251 | "Open a file for output, creating it if it doesn't already exist\n" | |
252 | "or removing its contents if it does.\n" | |
253 | "@item a\n" | |
1e6808ea MG |
254 | "Open a file for output, creating it if it doesn't already\n" |
255 | "exist. All writes to the port will go to the end of the file.\n" | |
fc0d72d4 MD |
256 | "The \"append mode\" can be turned off while the port is in use\n" |
257 | "@pxref{Ports and File Descriptors, fcntl}\n" | |
1e6808ea MG |
258 | "@end table\n" |
259 | "The following additional characters can be appended:\n" | |
fc0d72d4 MD |
260 | "@table @samp\n" |
261 | "@item +\n" | |
262 | "Open the port for both input and output. E.g., @code{r+}: open\n" | |
263 | "an existing file for both input and output.\n" | |
264 | "@item 0\n" | |
1e6808ea MG |
265 | "Create an \"unbuffered\" port. In this case input and output\n" |
266 | "operations are passed directly to the underlying port\n" | |
267 | "implementation without additional buffering. This is likely to\n" | |
268 | "slow down I/O operations. The buffering mode can be changed\n" | |
269 | "while a port is in use @pxref{Ports and File Descriptors,\n" | |
270 | "setvbuf}\n" | |
fc0d72d4 MD |
271 | "@item l\n" |
272 | "Add line-buffering to the port. The port output buffer will be\n" | |
273 | "automatically flushed whenever a newline character is written.\n" | |
1e6808ea MG |
274 | "@end table\n" |
275 | "In theory we could create read/write ports which were buffered\n" | |
276 | "in one direction only. However this isn't included in the\n" | |
277 | "current interfaces. If a file cannot be opened with the access\n" | |
278 | "requested, @code{open-file} throws an exception.") | |
1bbd0b84 | 279 | #define FUNC_NAME s_scm_open_file |
0f2d19dd | 280 | { |
19639113 | 281 | SCM port; |
cb63cf9e JB |
282 | int fdes; |
283 | int flags = 0; | |
19639113 | 284 | char *file; |
1e6808ea | 285 | char *md; |
cb63cf9e | 286 | char *ptr; |
19639113 | 287 | |
a6d9e5ab | 288 | SCM_VALIDATE_STRING (1, filename); |
1e6808ea | 289 | SCM_VALIDATE_STRING (2, mode); |
19639113 | 290 | |
a6d9e5ab | 291 | file = SCM_STRING_CHARS (filename); |
1e6808ea | 292 | md = SCM_STRING_CHARS (mode); |
19639113 | 293 | |
1e6808ea | 294 | switch (*md) |
0f2d19dd | 295 | { |
cb63cf9e JB |
296 | case 'r': |
297 | flags |= O_RDONLY; | |
298 | break; | |
299 | case 'w': | |
300 | flags |= O_WRONLY | O_CREAT | O_TRUNC; | |
301 | break; | |
302 | case 'a': | |
303 | flags |= O_WRONLY | O_CREAT | O_APPEND; | |
304 | break; | |
305 | default: | |
1e6808ea | 306 | scm_out_of_range (FUNC_NAME, mode); |
0f2d19dd | 307 | } |
1e6808ea | 308 | ptr = md + 1; |
cb63cf9e | 309 | while (*ptr != '\0') |
e145dd02 | 310 | { |
cb63cf9e JB |
311 | switch (*ptr) |
312 | { | |
313 | case '+': | |
314 | flags = (flags & ~(O_RDONLY | O_WRONLY)) | O_RDWR; | |
315 | break; | |
9f561420 GH |
316 | case 'b': |
317 | #if defined (O_BINARY) | |
318 | flags |= O_BINARY; | |
319 | #endif | |
320 | break; | |
cb63cf9e | 321 | case '0': /* unbuffered: handled later. */ |
d3639214 | 322 | case 'l': /* line buffered: handled during output. */ |
cb63cf9e JB |
323 | break; |
324 | default: | |
1e6808ea | 325 | scm_out_of_range (FUNC_NAME, mode); |
cb63cf9e JB |
326 | } |
327 | ptr++; | |
e145dd02 | 328 | } |
cb63cf9e JB |
329 | SCM_SYSCALL (fdes = open (file, flags, 0666)); |
330 | if (fdes == -1) | |
e145dd02 | 331 | { |
cb63cf9e JB |
332 | int en = errno; |
333 | ||
5d2d2ffc | 334 | SCM_SYSERROR_MSG ("~A: ~S", |
cb63cf9e | 335 | scm_cons (scm_makfrom0str (strerror (en)), |
5d2d2ffc | 336 | scm_cons (filename, SCM_EOL)), en); |
0f2d19dd | 337 | } |
1e6808ea | 338 | port = scm_fdes_to_port (fdes, md, filename); |
0f2d19dd JB |
339 | return port; |
340 | } | |
1bbd0b84 | 341 | #undef FUNC_NAME |
0f2d19dd | 342 | |
e145dd02 | 343 | \f |
82893676 MG |
344 | #ifdef __MINGW32__ |
345 | /* | |
346 | * Try getting the appropiate file flags for a given file descriptor | |
347 | * under Windows. This incorporates some fancy operations because Windows | |
348 | * differentiates between file, pipe and socket descriptors. | |
349 | */ | |
350 | #ifndef O_ACCMODE | |
351 | # define O_ACCMODE 0x0003 | |
352 | #endif | |
353 | ||
354 | static int getflags (int fdes) | |
355 | { | |
356 | int flags = 0; | |
357 | struct stat buf; | |
358 | int error, optlen = sizeof (int); | |
359 | ||
360 | /* Is this a socket ? */ | |
361 | if (getsockopt (fdes, SOL_SOCKET, SO_ERROR, (void *) &error, &optlen) >= 0) | |
362 | flags = O_RDWR; | |
363 | /* Maybe a regular file ? */ | |
364 | else if (fstat (fdes, &buf) < 0) | |
365 | flags = -1; | |
366 | else | |
367 | { | |
368 | /* Or an anonymous pipe handle ? */ | |
b8b17bfd | 369 | if (buf.st_mode & _S_IFIFO) |
8f99e3f3 SJ |
370 | flags = PeekNamedPipe ((HANDLE) _get_osfhandle (fdes), NULL, 0, |
371 | NULL, NULL, NULL) ? O_RDONLY : O_WRONLY; | |
82893676 | 372 | /* stdin ? */ |
b8b17bfd | 373 | else if (fdes == fileno (stdin) && isatty (fdes)) |
82893676 MG |
374 | flags = O_RDONLY; |
375 | /* stdout / stderr ? */ | |
b8b17bfd MV |
376 | else if ((fdes == fileno (stdout) || fdes == fileno (stderr)) && |
377 | isatty (fdes)) | |
82893676 MG |
378 | flags = O_WRONLY; |
379 | else | |
380 | flags = buf.st_mode; | |
381 | } | |
382 | return flags; | |
383 | } | |
384 | #endif /* __MINGW32__ */ | |
385 | ||
cb63cf9e | 386 | /* Building Guile ports from a file descriptor. */ |
e145dd02 | 387 | |
cb63cf9e | 388 | /* Build a Scheme port from an open file descriptor `fdes'. |
a089567e JB |
389 | MODE indicates whether FILE is open for reading or writing; it uses |
390 | the same notation as open-file's second argument. | |
19b27fa2 GH |
391 | NAME is a string to be used as the port's filename. |
392 | */ | |
a089567e | 393 | SCM |
cb63cf9e | 394 | scm_fdes_to_port (int fdes, char *mode, SCM name) |
19b27fa2 | 395 | #define FUNC_NAME "scm_fdes_to_port" |
a089567e JB |
396 | { |
397 | long mode_bits = scm_mode_bits (mode); | |
398 | SCM port; | |
92c2555f | 399 | scm_t_port *pt; |
19b27fa2 GH |
400 | int flags; |
401 | ||
402 | /* test that fdes is valid. */ | |
82893676 MG |
403 | #ifdef __MINGW32__ |
404 | flags = getflags (fdes); | |
405 | #else | |
19b27fa2 | 406 | flags = fcntl (fdes, F_GETFL, 0); |
82893676 | 407 | #endif |
19b27fa2 GH |
408 | if (flags == -1) |
409 | SCM_SYSERROR; | |
410 | flags &= O_ACCMODE; | |
411 | if (flags != O_RDWR | |
412 | && ((flags != O_WRONLY && (mode_bits & SCM_WRTNG)) | |
413 | || (flags != O_RDONLY && (mode_bits & SCM_RDNG)))) | |
414 | { | |
415 | SCM_MISC_ERROR ("requested file mode not available on fdes", SCM_EOL); | |
416 | } | |
a089567e | 417 | |
a089567e | 418 | SCM_DEFER_INTS; |
da220f27 HWN |
419 | |
420 | port = scm_new_port_table_entry (scm_tc16_fport); | |
421 | SCM_SET_CELL_TYPE(port, scm_tc16_fport | mode_bits); | |
422 | pt = SCM_PTAB_ENTRY(port); | |
a089567e | 423 | { |
92c2555f | 424 | scm_t_fport *fp |
4c9419ac | 425 | = (scm_t_fport *) scm_gc_malloc (sizeof (scm_t_fport), "file port"); |
c6c79933 | 426 | |
cb63cf9e | 427 | fp->fdes = fdes; |
0de97b83 | 428 | pt->rw_random = SCM_FDES_RANDOM_P (fdes); |
cb63cf9e JB |
429 | SCM_SETSTREAM (port, fp); |
430 | if (mode_bits & SCM_BUF0) | |
431 | scm_fport_buffer_add (port, 0, 0); | |
432 | else | |
433 | scm_fport_buffer_add (port, -1, -1); | |
a089567e | 434 | } |
b24b5e13 | 435 | SCM_SET_FILENAME (port, name); |
a089567e | 436 | SCM_ALLOW_INTS; |
e145dd02 JB |
437 | return port; |
438 | } | |
19b27fa2 | 439 | #undef FUNC_NAME |
e145dd02 | 440 | |
affc96b5 | 441 | /* Return a lower bound on the number of bytes available for input. */ |
cb63cf9e | 442 | static int |
affc96b5 | 443 | fport_input_waiting (SCM port) |
e145dd02 | 444 | { |
cb63cf9e JB |
445 | int fdes = SCM_FSTREAM (port)->fdes; |
446 | ||
447 | #ifdef HAVE_SELECT | |
448 | struct timeval timeout; | |
449 | SELECT_TYPE read_set; | |
450 | SELECT_TYPE write_set; | |
451 | SELECT_TYPE except_set; | |
452 | ||
453 | FD_ZERO (&read_set); | |
454 | FD_ZERO (&write_set); | |
455 | FD_ZERO (&except_set); | |
456 | ||
457 | FD_SET (fdes, &read_set); | |
458 | ||
459 | timeout.tv_sec = 0; | |
460 | timeout.tv_usec = 0; | |
461 | ||
462 | if (select (SELECT_SET_SIZE, | |
463 | &read_set, &write_set, &except_set, &timeout) | |
464 | < 0) | |
affc96b5 GH |
465 | scm_syserror ("fport_input_waiting"); |
466 | return FD_ISSET (fdes, &read_set) ? 1 : 0; | |
cb63cf9e JB |
467 | #elif defined (FIONREAD) |
468 | int remir; | |
469 | ioctl(fdes, FIONREAD, &remir); | |
470 | return remir; | |
471 | #else | |
affc96b5 | 472 | scm_misc_error ("fport_input_waiting", |
cb63cf9e JB |
473 | "Not fully implemented on this platform", |
474 | SCM_EOL); | |
475 | #endif | |
a089567e JB |
476 | } |
477 | ||
cb63cf9e | 478 | \f |
0f2d19dd | 479 | static int |
e81d98ec | 480 | fport_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED) |
0f2d19dd | 481 | { |
b3ec3c64 MD |
482 | scm_puts ("#<", port); |
483 | scm_print_port_mode (exp, port); | |
484 | if (SCM_OPFPORTP (exp)) | |
0f2d19dd | 485 | { |
b3ec3c64 | 486 | int fdes; |
b24b5e13 DH |
487 | SCM name = SCM_FILENAME (exp); |
488 | if (SCM_STRINGP (name) || SCM_SYMBOLP (name)) | |
489 | scm_display (name, port); | |
490 | else | |
491 | scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port); | |
b3ec3c64 MD |
492 | scm_putc (' ', port); |
493 | fdes = (SCM_FSTREAM (exp))->fdes; | |
494 | ||
82893676 | 495 | #ifdef HAVE_TTYNAME |
b3ec3c64 MD |
496 | if (isatty (fdes)) |
497 | scm_puts (ttyname (fdes), port); | |
498 | else | |
82893676 | 499 | #endif /* HAVE_TTYNAME */ |
b3ec3c64 | 500 | scm_intprint (fdes, 10, port); |
0f2d19dd JB |
501 | } |
502 | else | |
503 | { | |
b3ec3c64 MD |
504 | scm_puts (SCM_PTOBNAME (SCM_PTOBNUM (exp)), port); |
505 | scm_putc (' ', port); | |
63bcad19 | 506 | scm_intprint ((scm_t_bits) SCM_PTAB_ENTRY (exp), 16, port); |
0f2d19dd | 507 | } |
b3ec3c64 MD |
508 | scm_putc ('>', port); |
509 | return 1; | |
0f2d19dd JB |
510 | } |
511 | ||
cb63cf9e JB |
512 | /* thread-local block for input on fport's fdes. */ |
513 | static void | |
514 | fport_wait_for_input (SCM port) | |
3cb988bd | 515 | { |
cb63cf9e | 516 | int fdes = SCM_FSTREAM (port)->fdes; |
3cb988bd | 517 | |
affc96b5 | 518 | if (!fport_input_waiting (port)) |
8122b543 | 519 | { |
cb63cf9e JB |
520 | int n; |
521 | SELECT_TYPE readfds; | |
522 | int flags = fcntl (fdes, F_GETFL); | |
523 | ||
524 | if (flags == -1) | |
525 | scm_syserror ("scm_fdes_wait_for_input"); | |
526 | if (!(flags & O_NONBLOCK)) | |
527 | do | |
528 | { | |
529 | FD_ZERO (&readfds); | |
530 | FD_SET (fdes, &readfds); | |
531 | n = scm_internal_select (fdes + 1, &readfds, NULL, NULL, NULL); | |
532 | } | |
533 | while (n == -1 && errno == EINTR); | |
8122b543 | 534 | } |
3cb988bd | 535 | } |
0f2d19dd | 536 | |
affc96b5 | 537 | static void fport_flush (SCM port); |
0f2d19dd | 538 | |
c2da2648 GH |
539 | /* fill a port's read-buffer with a single read. returns the first |
540 | char or EOF if end of file. */ | |
0f2d19dd | 541 | static int |
affc96b5 | 542 | fport_fill_input (SCM port) |
0f2d19dd | 543 | { |
c014a02e | 544 | long count; |
92c2555f MV |
545 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
546 | scm_t_fport *fp = SCM_FSTREAM (port); | |
cb63cf9e | 547 | |
cb63cf9e | 548 | fport_wait_for_input (port); |
cb63cf9e JB |
549 | SCM_SYSCALL (count = read (fp->fdes, pt->read_buf, pt->read_buf_size)); |
550 | if (count == -1) | |
affc96b5 | 551 | scm_syserror ("fport_fill_input"); |
cb63cf9e JB |
552 | if (count == 0) |
553 | return EOF; | |
554 | else | |
555 | { | |
5c070ca7 | 556 | pt->read_pos = pt->read_buf; |
cb63cf9e | 557 | pt->read_end = pt->read_buf + count; |
5c070ca7 | 558 | return *pt->read_buf; |
cb63cf9e | 559 | } |
0f2d19dd JB |
560 | } |
561 | ||
cb63cf9e | 562 | static off_t |
affc96b5 | 563 | fport_seek (SCM port, off_t offset, int whence) |
0f2d19dd | 564 | { |
92c2555f MV |
565 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
566 | scm_t_fport *fp = SCM_FSTREAM (port); | |
7dcb364d GH |
567 | off_t rv; |
568 | off_t result; | |
569 | ||
570 | if (pt->rw_active == SCM_PORT_WRITE) | |
571 | { | |
572 | if (offset != 0 || whence != SEEK_CUR) | |
573 | { | |
574 | fport_flush (port); | |
575 | result = rv = lseek (fp->fdes, offset, whence); | |
576 | } | |
577 | else | |
578 | { | |
579 | /* read current position without disturbing the buffer. */ | |
580 | rv = lseek (fp->fdes, offset, whence); | |
581 | result = rv + (pt->write_pos - pt->write_buf); | |
582 | } | |
583 | } | |
584 | else if (pt->rw_active == SCM_PORT_READ) | |
585 | { | |
586 | if (offset != 0 || whence != SEEK_CUR) | |
587 | { | |
588 | /* could expand to avoid a second seek. */ | |
589 | scm_end_input (port); | |
590 | result = rv = lseek (fp->fdes, offset, whence); | |
591 | } | |
592 | else | |
593 | { | |
594 | /* read current position without disturbing the buffer | |
595 | (particularly the unread-char buffer). */ | |
596 | rv = lseek (fp->fdes, offset, whence); | |
597 | result = rv - (pt->read_end - pt->read_pos); | |
598 | ||
599 | if (pt->read_buf == pt->putback_buf) | |
600 | result -= pt->saved_read_end - pt->saved_read_pos; | |
601 | } | |
602 | } | |
603 | else /* SCM_PORT_NEITHER */ | |
604 | { | |
605 | result = rv = lseek (fp->fdes, offset, whence); | |
606 | } | |
cb8dfa3f | 607 | |
7dcb364d | 608 | if (rv == -1) |
affc96b5 | 609 | scm_syserror ("fport_seek"); |
7dcb364d | 610 | |
cb8dfa3f | 611 | return result; |
0f2d19dd JB |
612 | } |
613 | ||
840ae05d | 614 | static void |
affc96b5 | 615 | fport_truncate (SCM port, off_t length) |
840ae05d | 616 | { |
92c2555f | 617 | scm_t_fport *fp = SCM_FSTREAM (port); |
840ae05d JB |
618 | |
619 | if (ftruncate (fp->fdes, length) == -1) | |
620 | scm_syserror ("ftruncate"); | |
621 | } | |
622 | ||
0c6d2191 GH |
623 | /* helper for fport_write: try to write data, using multiple system |
624 | calls if required. */ | |
625 | #define FUNC_NAME "write_all" | |
626 | static void write_all (SCM port, const void *data, size_t remaining) | |
627 | { | |
628 | int fdes = SCM_FSTREAM (port)->fdes; | |
629 | ||
630 | while (remaining > 0) | |
631 | { | |
82893676 | 632 | size_t done; |
0c6d2191 GH |
633 | |
634 | SCM_SYSCALL (done = write (fdes, data, remaining)); | |
635 | ||
636 | if (done == -1) | |
637 | SCM_SYSERROR; | |
638 | remaining -= done; | |
639 | data = ((const char *) data) + done; | |
640 | } | |
641 | } | |
642 | #undef FUNC_NAME | |
643 | ||
31703ab8 | 644 | static void |
8aa011a1 | 645 | fport_write (SCM port, const void *data, size_t size) |
31703ab8 | 646 | { |
0c6d2191 | 647 | /* this procedure tries to minimize the number of writes/flushes. */ |
92c2555f | 648 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
31703ab8 | 649 | |
0c6d2191 GH |
650 | if (pt->write_buf == &pt->shortbuf |
651 | || (pt->write_pos == pt->write_buf && size >= pt->write_buf_size)) | |
31703ab8 | 652 | { |
0c6d2191 GH |
653 | /* "unbuffered" port, or |
654 | port with empty buffer and data won't fit in buffer. */ | |
655 | write_all (port, data, size); | |
656 | return; | |
31703ab8 | 657 | } |
d3639214 | 658 | |
0c6d2191 GH |
659 | { |
660 | off_t space = pt->write_end - pt->write_pos; | |
661 | ||
662 | if (size <= space) | |
663 | { | |
664 | /* data fits in buffer. */ | |
665 | memcpy (pt->write_pos, data, size); | |
666 | pt->write_pos += size; | |
667 | if (pt->write_pos == pt->write_end) | |
668 | { | |
affc96b5 | 669 | fport_flush (port); |
0c6d2191 GH |
670 | /* we can skip the line-buffering check if nothing's buffered. */ |
671 | return; | |
672 | } | |
673 | } | |
674 | else | |
675 | { | |
676 | memcpy (pt->write_pos, data, space); | |
677 | pt->write_pos = pt->write_end; | |
678 | fport_flush (port); | |
679 | { | |
680 | const void *ptr = ((const char *) data) + space; | |
681 | size_t remaining = size - space; | |
682 | ||
683 | if (size >= pt->write_buf_size) | |
684 | { | |
685 | write_all (port, ptr, remaining); | |
686 | return; | |
687 | } | |
688 | else | |
689 | { | |
690 | memcpy (pt->write_pos, ptr, remaining); | |
691 | pt->write_pos += remaining; | |
692 | } | |
31703ab8 | 693 | } |
0c6d2191 | 694 | } |
31703ab8 | 695 | |
0c6d2191 GH |
696 | /* handle line buffering. */ |
697 | if ((SCM_CELL_WORD_0 (port) & SCM_BUFLINE) && memchr (data, '\n', size)) | |
698 | fport_flush (port); | |
699 | } | |
31703ab8 GH |
700 | } |
701 | ||
702 | /* becomes 1 when process is exiting: normal exception handling won't | |
703 | work by this time. */ | |
04a98cff | 704 | extern int scm_i_terminating; |
0f2d19dd | 705 | |
cb63cf9e | 706 | static void |
affc96b5 | 707 | fport_flush (SCM port) |
0f2d19dd | 708 | { |
92c2555f MV |
709 | scm_t_port *pt = SCM_PTAB_ENTRY (port); |
710 | scm_t_fport *fp = SCM_FSTREAM (port); | |
6f760c1d | 711 | unsigned char *ptr = pt->write_buf; |
c014a02e ML |
712 | long init_size = pt->write_pos - pt->write_buf; |
713 | long remaining = init_size; | |
0f2d19dd | 714 | |
cb63cf9e JB |
715 | while (remaining > 0) |
716 | { | |
c014a02e | 717 | long count; |
cb63cf9e JB |
718 | |
719 | SCM_SYSCALL (count = write (fp->fdes, ptr, remaining)); | |
720 | if (count < 0) | |
721 | { | |
722 | /* error. assume nothing was written this call, but | |
723 | fix up the buffer for any previous successful writes. */ | |
c014a02e | 724 | long done = init_size - remaining; |
cb63cf9e JB |
725 | |
726 | if (done > 0) | |
727 | { | |
728 | int i; | |
729 | ||
730 | for (i = 0; i < remaining; i++) | |
731 | { | |
732 | *(pt->write_buf + i) = *(pt->write_buf + done + i); | |
733 | } | |
734 | pt->write_pos = pt->write_buf + remaining; | |
735 | } | |
04a98cff | 736 | if (scm_i_terminating) |
cb63cf9e JB |
737 | { |
738 | const char *msg = "Error: could not flush file-descriptor "; | |
739 | char buf[11]; | |
740 | ||
741 | write (2, msg, strlen (msg)); | |
742 | sprintf (buf, "%d\n", fp->fdes); | |
743 | write (2, buf, strlen (buf)); | |
744 | ||
745 | count = remaining; | |
746 | } | |
6b72ac1d GH |
747 | else if (scm_gc_running_p) |
748 | { | |
749 | /* silently ignore the error. scm_error would abort if we | |
750 | called it now. */ | |
751 | count = remaining; | |
752 | } | |
753 | else | |
754 | scm_syserror ("fport_flush"); | |
cb63cf9e JB |
755 | } |
756 | ptr += count; | |
757 | remaining -= count; | |
758 | } | |
759 | pt->write_pos = pt->write_buf; | |
61e452ba | 760 | pt->rw_active = SCM_PORT_NEITHER; |
840ae05d JB |
761 | } |
762 | ||
283a1a0e | 763 | /* clear the read buffer and adjust the file position for unread bytes. */ |
840ae05d | 764 | static void |
affc96b5 | 765 | fport_end_input (SCM port, int offset) |
840ae05d | 766 | { |
92c2555f MV |
767 | scm_t_fport *fp = SCM_FSTREAM (port); |
768 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
283a1a0e GH |
769 | |
770 | offset += pt->read_end - pt->read_pos; | |
840ae05d | 771 | |
840ae05d JB |
772 | if (offset > 0) |
773 | { | |
774 | pt->read_pos = pt->read_end; | |
775 | /* will throw error if unread-char used at beginning of file | |
776 | then attempting to write. seems correct. */ | |
777 | if (lseek (fp->fdes, -offset, SEEK_CUR) == -1) | |
affc96b5 | 778 | scm_syserror ("fport_end_input"); |
840ae05d | 779 | } |
61e452ba | 780 | pt->rw_active = SCM_PORT_NEITHER; |
8f29fbd0 JB |
781 | } |
782 | ||
6a2c4c81 | 783 | static int |
affc96b5 | 784 | fport_close (SCM port) |
6a2c4c81 | 785 | { |
92c2555f MV |
786 | scm_t_fport *fp = SCM_FSTREAM (port); |
787 | scm_t_port *pt = SCM_PTAB_ENTRY (port); | |
cb63cf9e | 788 | int rv; |
840ae05d | 789 | |
affc96b5 | 790 | fport_flush (port); |
cb63cf9e JB |
791 | SCM_SYSCALL (rv = close (fp->fdes)); |
792 | if (rv == -1 && errno != EBADF) | |
6b72ac1d GH |
793 | { |
794 | if (scm_gc_running_p) | |
795 | /* silently ignore the error. scm_error would abort if we | |
796 | called it now. */ | |
797 | ; | |
798 | else | |
799 | scm_syserror ("fport_close"); | |
800 | } | |
6c951427 GH |
801 | if (pt->read_buf == pt->putback_buf) |
802 | pt->read_buf = pt->saved_read_buf; | |
cb63cf9e | 803 | if (pt->read_buf != &pt->shortbuf) |
4c9419ac | 804 | scm_gc_free (pt->read_buf, pt->read_buf_size, "port buffer"); |
cb63cf9e | 805 | if (pt->write_buf != &pt->shortbuf) |
4c9419ac MV |
806 | scm_gc_free (pt->write_buf, pt->write_buf_size, "port buffer"); |
807 | scm_gc_free (fp, sizeof (*fp), "file port"); | |
cb63cf9e | 808 | return rv; |
6a2c4c81 JB |
809 | } |
810 | ||
1be6b49c | 811 | static size_t |
affc96b5 | 812 | fport_free (SCM port) |
b3ec3c64 | 813 | { |
affc96b5 | 814 | fport_close (port); |
b3ec3c64 MD |
815 | return 0; |
816 | } | |
817 | ||
92c2555f | 818 | static scm_t_bits |
b3ec3c64 MD |
819 | scm_make_fptob () |
820 | { | |
92c2555f | 821 | scm_t_bits tc = scm_make_port_type ("file", fport_fill_input, fport_write); |
a98bddfd | 822 | |
affc96b5 | 823 | scm_set_port_free (tc, fport_free); |
e841c3e0 | 824 | scm_set_port_print (tc, fport_print); |
affc96b5 GH |
825 | scm_set_port_flush (tc, fport_flush); |
826 | scm_set_port_end_input (tc, fport_end_input); | |
827 | scm_set_port_close (tc, fport_close); | |
828 | scm_set_port_seek (tc, fport_seek); | |
829 | scm_set_port_truncate (tc, fport_truncate); | |
830 | scm_set_port_input_waiting (tc, fport_input_waiting); | |
a98bddfd DH |
831 | |
832 | return tc; | |
b3ec3c64 | 833 | } |
0f2d19dd | 834 | |
0f2d19dd JB |
835 | void |
836 | scm_init_fports () | |
0f2d19dd | 837 | { |
a98bddfd DH |
838 | scm_tc16_fport = scm_make_fptob (); |
839 | ||
86d31dfe MV |
840 | scm_c_define ("_IOFBF", SCM_MAKINUM (_IOFBF)); |
841 | scm_c_define ("_IOLBF", SCM_MAKINUM (_IOLBF)); | |
842 | scm_c_define ("_IONBF", SCM_MAKINUM (_IONBF)); | |
a98bddfd | 843 | |
a98bddfd | 844 | #include "libguile/fports.x" |
0f2d19dd | 845 | } |
89e00824 ML |
846 | |
847 | /* | |
848 | Local Variables: | |
849 | c-file-style: "gnu" | |
850 | End: | |
851 | */ |