Commit | Line | Data |
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3d8d56df | 1 | /* Copyright (C) 1995,1996,1997 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program 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 | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
0f2d19dd JB |
41 | \f |
42 | ||
43 | #include <stdio.h> | |
44 | #include "_scm.h" | |
20e6290e JB |
45 | #include "markers.h" |
46 | ||
47 | #include "fports.h" | |
95b88819 GH |
48 | |
49 | #ifdef HAVE_STRING_H | |
50 | #include <string.h> | |
51 | #endif | |
0f2d19dd JB |
52 | #ifdef HAVE_UNISTD_H |
53 | #include <unistd.h> | |
54 | #else | |
0f2d19dd JB |
55 | scm_sizet fwrite (); |
56 | #endif | |
0f2d19dd | 57 | |
0f2d19dd JB |
58 | /* {Ports - file ports} |
59 | * | |
60 | */ | |
61 | ||
62 | /* should be called with SCM_DEFER_INTS active */ | |
1717856b | 63 | |
0f2d19dd JB |
64 | SCM |
65 | scm_setbuf0 (port) | |
66 | SCM port; | |
0f2d19dd | 67 | { |
7a6f1ffa GH |
68 | /* NOSETBUF was provided by scm to allow unbuffered ports to be |
69 | avoided on systems where ungetc didn't work correctly. See | |
70 | comment in unif.c, which seems to be the only place where it | |
71 | could still be a problem. */ | |
0f2d19dd | 72 | #ifndef NOSETBUF |
7a6f1ffa GH |
73 | /* SCM_SYSCALL (setbuf ((FILE *)SCM_STREAM (port), 0);); */ |
74 | SCM_SYSCALL (setvbuf ((FILE *)SCM_STREAM (port), 0, _IONBF, 0);); | |
0f2d19dd | 75 | #endif |
7a6f1ffa GH |
76 | return SCM_UNSPECIFIED; |
77 | } | |
78 | ||
79 | SCM_PROC (s_setvbuf, "setvbuf", 2, 1, 0, scm_setvbuf); | |
80 | SCM | |
81 | scm_setvbuf (SCM port, SCM mode, SCM size) | |
82 | { | |
83 | int rv; | |
84 | int cmode, csize; | |
85 | ||
86 | SCM_ASSERT (SCM_NIMP (port) && SCM_FPORTP (port), port, SCM_ARG1, s_setvbuf); | |
87 | SCM_ASSERT (SCM_INUMP (mode), mode, SCM_ARG2, s_setvbuf); | |
88 | if (SCM_UNBNDP (size)) | |
89 | csize = 0; | |
90 | else | |
91 | { | |
92 | SCM_ASSERT (SCM_INUMP (size), size, SCM_ARG3, s_setvbuf); | |
93 | csize = SCM_INUM (size); | |
94 | } | |
95 | cmode = SCM_INUM (mode); | |
96 | if (csize == 0 && cmode == _IOFBF) | |
97 | cmode = _IONBF; | |
98 | SCM_DEFER_INTS; | |
99 | SCM_SYSCALL (rv = setvbuf ((FILE *)SCM_STREAM (port), 0, cmode, csize)); | |
100 | if (rv < 0) | |
101 | scm_syserror (s_setvbuf); | |
102 | if (cmode == _IONBF) | |
103 | SCM_SETCAR (port, SCM_CAR (port) | SCM_BUF0); | |
104 | else | |
105 | SCM_SETCAR (port, (SCM_CAR (port) & ~SCM_BUF0)); | |
106 | SCM_ALLOW_INTS; | |
107 | return SCM_UNSPECIFIED; | |
108 | } | |
109 | ||
110 | #ifdef FD_SETTER | |
111 | #define SET_FILE_FD_FIELD(F,D) ((F)->FD_SETTER = (D)) | |
0f2d19dd | 112 | #endif |
7a6f1ffa GH |
113 | |
114 | void | |
115 | scm_setfileno (fs, fd) | |
116 | FILE *fs; | |
117 | int fd; | |
118 | { | |
119 | #ifdef SET_FILE_FD_FIELD | |
120 | SET_FILE_FD_FIELD(fs, fd); | |
121 | #else | |
122 | scm_misc_error ("scm_setfileno", "Not fully implemented on this platform", | |
123 | SCM_EOL); | |
0f2d19dd | 124 | #endif |
0f2d19dd JB |
125 | } |
126 | ||
eadd48de GH |
127 | /* Move ports with the specified file descriptor to new descriptors, |
128 | * reseting the revealed count to 0. | |
129 | * Should be called with SCM_DEFER_INTS active. | |
0f2d19dd | 130 | */ |
1717856b | 131 | |
eadd48de GH |
132 | void |
133 | scm_evict_ports (fd) | |
134 | int fd; | |
0f2d19dd | 135 | { |
eadd48de | 136 | int i; |
0f2d19dd | 137 | |
eadd48de GH |
138 | for (i = 0; i < scm_port_table_size; i++) |
139 | { | |
140 | if (SCM_FPORTP (scm_port_table[i]->port) | |
141 | && fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == fd) | |
142 | { | |
143 | scm_setfileno ((FILE *)SCM_STREAM (scm_port_table[i]->port), dup (fd)); | |
144 | scm_set_port_revealed_x (scm_port_table[i]->port, SCM_MAKINUM (0)); | |
145 | } | |
146 | } | |
147 | } | |
0f2d19dd JB |
148 | |
149 | /* scm_open_file | |
150 | * Return a new port open on a given file. | |
151 | * | |
152 | * The mode string must match the pattern: [rwa+]** which | |
153 | * is interpreted in the usual unix way. | |
154 | * | |
155 | * Return the new port. | |
156 | */ | |
19639113 | 157 | SCM_PROC(s_open_file, "open-file", 2, 0, 0, scm_open_file); |
1717856b | 158 | |
0f2d19dd | 159 | SCM |
19639113 GH |
160 | scm_open_file (filename, modes) |
161 | SCM filename; | |
162 | SCM modes; | |
0f2d19dd | 163 | { |
19639113 | 164 | SCM port; |
0f2d19dd | 165 | FILE *f; |
19639113 GH |
166 | char *file; |
167 | char *mode; | |
168 | ||
169 | SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename, SCM_ARG1, s_open_file); | |
170 | SCM_ASSERT (SCM_NIMP (modes) && SCM_ROSTRINGP (modes), modes, SCM_ARG2, s_open_file); | |
171 | if (SCM_SUBSTRP (filename)) | |
172 | filename = scm_makfromstr (SCM_ROCHARS (filename), SCM_ROLENGTH (filename), 0); | |
173 | if (SCM_SUBSTRP (modes)) | |
174 | modes = scm_makfromstr (SCM_ROCHARS (modes), SCM_ROLENGTH (modes), 0); | |
175 | ||
176 | file = SCM_ROCHARS (filename); | |
177 | mode = SCM_ROCHARS (modes); | |
178 | ||
0f2d19dd JB |
179 | SCM_NEWCELL (port); |
180 | SCM_DEFER_INTS; | |
19639113 | 181 | SCM_SYSCALL (f = fopen (file, mode)); |
0f2d19dd JB |
182 | if (!f) |
183 | { | |
3d8d56df GH |
184 | int en = errno; |
185 | ||
f5bf2977 | 186 | scm_syserror_msg (s_open_file, "%s: %S", |
19639113 GH |
187 | scm_listify (scm_makfrom0str (strerror (errno)), |
188 | filename, | |
3d8d56df GH |
189 | SCM_UNDEFINED), |
190 | en); | |
0f2d19dd JB |
191 | } |
192 | else | |
193 | { | |
194 | struct scm_port_table * pt; | |
19639113 | 195 | |
0f2d19dd JB |
196 | pt = scm_add_to_port_table (port); |
197 | SCM_SETPTAB_ENTRY (port, pt); | |
a6c64c3c | 198 | SCM_SETCAR (port, scm_tc16_fport | scm_mode_bits (mode)); |
7471fb03 | 199 | SCM_SETSTREAM (port, (SCM) f); |
a6c64c3c | 200 | if (SCM_BUF0 & SCM_CAR (port)) |
0f2d19dd | 201 | scm_setbuf0 (port); |
96937708 | 202 | SCM_PTAB_ENTRY (port)->file_name = filename; |
0f2d19dd | 203 | } |
19639113 | 204 | SCM_ALLOW_INTS; |
0f2d19dd JB |
205 | return port; |
206 | } | |
207 | ||
a089567e JB |
208 | |
209 | /* Build a Scheme port from an open stdio port, FILE. | |
210 | MODE indicates whether FILE is open for reading or writing; it uses | |
211 | the same notation as open-file's second argument. | |
212 | If NAME is non-zero, use it as the port's filename. | |
213 | ||
214 | scm_stdio_to_port sets the revealed count for FILE's file | |
215 | descriptor to 1, so that FILE won't be closed when the port object | |
216 | is GC'd. */ | |
217 | SCM | |
218 | scm_stdio_to_port (file, mode, name) | |
219 | FILE *file; | |
220 | char *mode; | |
221 | char *name; | |
222 | { | |
223 | long mode_bits = scm_mode_bits (mode); | |
224 | SCM port; | |
225 | struct scm_port_table * pt; | |
226 | ||
227 | SCM_NEWCELL (port); | |
228 | SCM_DEFER_INTS; | |
229 | { | |
230 | pt = scm_add_to_port_table (port); | |
231 | SCM_SETPTAB_ENTRY (port, pt); | |
232 | SCM_SETCAR (port, (scm_tc16_fport | mode_bits)); | |
7471fb03 | 233 | SCM_SETSTREAM (port, (SCM) file); |
a089567e JB |
234 | if (SCM_BUF0 & SCM_CAR (port)) |
235 | scm_setbuf0 (port); | |
a089567e JB |
236 | SCM_PTAB_ENTRY (port)->file_name = scm_makfrom0str (name); |
237 | } | |
238 | SCM_ALLOW_INTS; | |
239 | scm_set_port_revealed_x (port, SCM_MAKINUM (1)); | |
240 | return port; | |
241 | } | |
242 | ||
243 | ||
1717856b JB |
244 | |
245 | static int prinfport SCM_P ((SCM exp, SCM port, scm_print_state *pstate)); | |
246 | ||
0f2d19dd | 247 | static int |
1717856b | 248 | prinfport (exp, port, pstate) |
0f2d19dd JB |
249 | SCM exp; |
250 | SCM port; | |
1717856b | 251 | scm_print_state *pstate; |
0f2d19dd JB |
252 | { |
253 | SCM name; | |
254 | char * c; | |
255 | if (SCM_CLOSEDP (exp)) | |
256 | { | |
257 | c = "file"; | |
258 | } | |
259 | else | |
260 | { | |
261 | name = SCM_PTAB_ENTRY (exp)->file_name; | |
262 | if (SCM_NIMP (name) && SCM_ROSTRINGP (name)) | |
263 | c = SCM_ROCHARS (name); | |
264 | else | |
265 | c = "file"; | |
266 | } | |
19639113 | 267 | |
0f2d19dd JB |
268 | scm_prinport (exp, port, c); |
269 | return !0; | |
270 | } | |
271 | ||
272 | ||
1717856b JB |
273 | |
274 | static int scm_fgetc SCM_P ((FILE * s)); | |
275 | ||
0f2d19dd JB |
276 | static int |
277 | scm_fgetc (s) | |
278 | FILE * s; | |
0f2d19dd JB |
279 | { |
280 | if (feof (s)) | |
281 | return EOF; | |
282 | else | |
283 | return fgetc (s); | |
284 | } | |
285 | ||
3cb988bd TP |
286 | /* |
287 | * The fgets method must take a port as its argument, rather than | |
288 | * the underlying file handle. The reason is that we also provide | |
289 | * a generic fgets method for ports which can't use fgets(3) (e.g. | |
290 | * string ports). This generic method calls the port's own | |
291 | * fgetc method. In order for it to know how to get that method, | |
292 | * we must pass the original Scheme port object. | |
293 | */ | |
294 | ||
295 | static char * scm_fgets SCM_P ((SCM port)); | |
296 | ||
297 | static char * | |
298 | scm_fgets (port) | |
299 | SCM port; | |
300 | { | |
301 | FILE *f; | |
302 | ||
303 | char *buf = NULL; | |
304 | char *p; /* pointer to current buffer position */ | |
305 | int i = 0; /* index into current buffer position */ | |
306 | int limit = 80; /* current size of buffer */ | |
3cb988bd | 307 | |
7a6f1ffa | 308 | f = (FILE *) SCM_STREAM (port); |
3cb988bd TP |
309 | if (feof (f)) |
310 | return NULL; | |
311 | ||
312 | buf = (char *) scm_must_malloc (limit * sizeof(char), "fgets"); | |
313 | ||
314 | while (1) { | |
315 | p = buf + i; | |
316 | if (fgets (p, limit - i, f) == NULL) { | |
317 | if (i) | |
318 | return buf; | |
319 | scm_must_free (buf); | |
320 | return NULL; | |
321 | } | |
322 | ||
323 | if (strlen(p) < limit - i - 1) | |
324 | return buf; | |
325 | ||
326 | buf = (char *) scm_must_realloc (buf, | |
327 | sizeof(char) * limit, | |
328 | sizeof(char) * limit * 2, | |
329 | "fgets"); | |
330 | ||
331 | i = limit - 1; | |
332 | limit *= 2; | |
333 | } | |
334 | } | |
335 | ||
0f2d19dd | 336 | #ifdef vms |
1717856b JB |
337 | |
338 | static scm_sizet pwrite SCM_P ((char *ptr, scm_sizet size, nitems, FILE *port)); | |
339 | ||
0f2d19dd JB |
340 | static scm_sizet |
341 | pwrite (ptr, size, nitems, port) | |
342 | char *ptr; | |
343 | scm_sizet size, nitems; | |
344 | FILE *port; | |
0f2d19dd JB |
345 | { |
346 | scm_sizet len = size * nitems; | |
347 | scm_sizet i = 0; | |
348 | for (; i < len; i++) | |
349 | putc (ptr[i], port); | |
350 | return len; | |
351 | } | |
352 | ||
353 | #define ffwrite pwrite | |
354 | #else | |
355 | #define ffwrite fwrite | |
356 | #endif | |
357 | ||
358 | \f | |
359 | /* This otherwise pointless code helps some poor | |
360 | * crippled C compilers cope with life. | |
361 | */ | |
1717856b JB |
362 | |
363 | static int local_fclose SCM_P ((FILE *fp)); | |
364 | ||
0f2d19dd JB |
365 | static int |
366 | local_fclose (fp) | |
367 | FILE * fp; | |
368 | { | |
369 | return fclose (fp); | |
370 | } | |
371 | ||
1717856b JB |
372 | static int local_fflush SCM_P ((FILE *fp)); |
373 | ||
0f2d19dd JB |
374 | static int |
375 | local_fflush (fp) | |
376 | FILE * fp; | |
377 | { | |
378 | return fflush (fp); | |
379 | } | |
380 | ||
1717856b JB |
381 | static int local_fputc SCM_P ((int c, FILE *fp)); |
382 | ||
0f2d19dd JB |
383 | static int |
384 | local_fputc (c, fp) | |
385 | int c; | |
386 | FILE * fp; | |
387 | { | |
388 | return fputc (c, fp); | |
389 | } | |
390 | ||
1717856b JB |
391 | static int local_fputs SCM_P ((char *s, FILE *fp)); |
392 | ||
0f2d19dd JB |
393 | static int |
394 | local_fputs (s, fp) | |
395 | char * s; | |
396 | FILE * fp; | |
397 | { | |
398 | return fputs (s, fp); | |
399 | } | |
400 | ||
1717856b JB |
401 | static scm_sizet local_ffwrite SCM_P ((void *ptr, int size, int nitems, FILE *fp)); |
402 | ||
0f2d19dd JB |
403 | static scm_sizet |
404 | local_ffwrite (ptr, size, nitems, fp) | |
405 | void * ptr; | |
406 | int size; | |
407 | int nitems; | |
408 | FILE * fp; | |
409 | { | |
410 | return ffwrite (ptr, size, nitems, fp); | |
411 | } | |
412 | ||
8f29fbd0 JB |
413 | static int |
414 | print_pipe_port (SCM exp, SCM port, scm_print_state *pstate) | |
415 | { | |
416 | scm_prinport (exp, port, "pipe"); | |
417 | return 1; | |
418 | } | |
419 | ||
420 | ||
421 | ||
6a2c4c81 JB |
422 | /* On SunOS, there's no declaration for pclose in the headers, so |
423 | putting it directly in the initializer for scm_pipob doesn't really | |
424 | fly. We could add an extern declaration for it, but then it'll | |
425 | mismatch on some systems that do have a declaration. So we just | |
426 | wrap it up this way. */ | |
427 | static int | |
428 | local_pclose (fp) | |
429 | FILE * fp; | |
430 | { | |
431 | return pclose (fp); | |
432 | } | |
433 | ||
0f2d19dd JB |
434 | \f |
435 | scm_ptobfuns scm_fptob = | |
436 | { | |
437 | scm_mark0, | |
1717856b | 438 | (int (*) SCM_P ((SCM))) local_fclose, |
0f2d19dd JB |
439 | prinfport, |
440 | 0, | |
1717856b JB |
441 | (int (*) SCM_P ((int, SCM))) local_fputc, |
442 | (int (*) SCM_P ((char *, SCM))) local_fputs, | |
443 | (scm_sizet (*) SCM_P ((char *, scm_sizet, scm_sizet, SCM))) local_ffwrite, | |
444 | (int (*) SCM_P ((SCM))) local_fflush, | |
445 | (int (*) SCM_P ((SCM))) scm_fgetc, | |
3cb988bd | 446 | (char * (*) SCM_P ((SCM))) scm_fgets, |
1717856b | 447 | (int (*) SCM_P ((SCM))) local_fclose |
0f2d19dd JB |
448 | }; |
449 | ||
6a2c4c81 | 450 | /* {Pipe ports} */ |
0f2d19dd JB |
451 | scm_ptobfuns scm_pipob = |
452 | { | |
453 | scm_mark0, | |
6a2c4c81 | 454 | (int (*) SCM_P ((SCM))) local_pclose, |
8f29fbd0 | 455 | print_pipe_port, |
0f2d19dd | 456 | 0, |
1717856b JB |
457 | (int (*) SCM_P ((int, SCM))) local_fputc, |
458 | (int (*) SCM_P ((char *, SCM))) local_fputs, | |
459 | (scm_sizet (*) SCM_P ((char *, scm_sizet, scm_sizet, SCM))) local_ffwrite, | |
460 | (int (*) SCM_P ((SCM))) local_fflush, | |
461 | (int (*) SCM_P ((SCM))) scm_fgetc, | |
3cb988bd | 462 | (char * (*) SCM_P ((SCM))) scm_fgets, |
6a2c4c81 | 463 | (int (*) SCM_P ((SCM))) local_pclose |
19468eff | 464 | }; |
0f2d19dd | 465 | |
0f2d19dd JB |
466 | void |
467 | scm_init_fports () | |
0f2d19dd JB |
468 | { |
469 | #include "fports.x" | |
7a6f1ffa GH |
470 | scm_sysintern ("_IOFBF", SCM_MAKINUM (_IOFBF)); |
471 | scm_sysintern ("_IOLBF", SCM_MAKINUM (_IOLBF)); | |
472 | scm_sysintern ("_IONBF", SCM_MAKINUM (_IONBF)); | |
0f2d19dd | 473 | } |