1 /* Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
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)
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.
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
15 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
16 * Boston, MA 02111-1307 USA
18 * As a special exception, the Free Software Foundation gives permission
19 * for additional uses of the text contained in its release of GUILE.
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.
27 * This exception does not however invalidate any other reasons why
28 * the executable file might be covered by the GNU General Public License.
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.
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.
40 * If you do not wish that, delete this exception notice. */
64 #ifdef HAVE_SYS_IOCTL_H
65 #include <sys/ioctl.h>
70 /* scm_ptobs scm_numptob
71 * implement a dynamicly resized array of ptob records.
72 * Indexes into this table are used when generating type
73 * tags for smobjects (if you know a tag you can get an index and conversely).
75 scm_ptobfuns
*scm_ptobs
;
76 scm_sizet scm_numptob
;
84 if (SCM_GC8MARKP (ptr
))
86 openp
= SCM_CAR (ptr
) & SCM_OPN
;
89 return SCM_STREAM (ptr
);
101 if (255 <= scm_numptob
)
104 SCM_SYSCALL (tmp
= (char *) realloc ((char *) scm_ptobs
, (1 + scm_numptob
) * sizeof (scm_ptobfuns
)));
107 scm_ptobs
= (scm_ptobfuns
*) tmp
;
108 scm_ptobs
[scm_numptob
].mark
= ptob
->mark
;
109 scm_ptobs
[scm_numptob
].free
= ptob
->free
;
110 scm_ptobs
[scm_numptob
].print
= ptob
->print
;
111 scm_ptobs
[scm_numptob
].equalp
= ptob
->equalp
;
112 scm_ptobs
[scm_numptob
].fputc
= ptob
->fputc
;
113 scm_ptobs
[scm_numptob
].fputs
= ptob
->fputs
;
114 scm_ptobs
[scm_numptob
].fwrite
= ptob
->fwrite
;
115 scm_ptobs
[scm_numptob
].fflush
= ptob
->fflush
;
116 scm_ptobs
[scm_numptob
].fgetc
= ptob
->fgetc
;
117 scm_ptobs
[scm_numptob
].fgets
= ptob
->fgets
;
118 scm_ptobs
[scm_numptob
].fclose
= ptob
->fclose
;
123 ptoberr
:scm_wta (SCM_MAKINUM ((long) scm_numptob
), (char *) SCM_NALLOC
, "newptob");
124 return scm_tc7_port
+ (scm_numptob
- 1) * 256;
128 /* internal SCM call */
134 scm_sizet i
= SCM_PTOBNUM (port
);
135 (scm_ptobs
[i
].fflush
) (SCM_STREAM (port
));
140 SCM_PROC(s_char_ready_p
, "char-ready?", 0, 1, 0, scm_char_ready_p
);
143 scm_char_ready_p (port
)
146 if (SCM_UNBNDP (port
))
149 SCM_ASSERT (SCM_NIMP (port
) && SCM_OPINPORTP (port
), port
, SCM_ARG1
, s_char_ready_p
);
150 if (SCM_CRDYP (port
) || !SCM_FPORTP (port
))
152 return (scm_input_waiting_p ((FILE *) SCM_STREAM (port
), s_char_ready_p
)
163 SCM_PROC(s_current_input_port
, "current-input-port", 0, 0, 0, scm_current_input_port
);
166 scm_current_input_port ()
171 SCM_PROC(s_current_output_port
, "current-output-port", 0, 0, 0, scm_current_output_port
);
174 scm_current_output_port ()
179 SCM_PROC(s_current_error_port
, "current-error-port", 0, 0, 0, scm_current_error_port
);
182 scm_current_error_port ()
187 SCM_PROC(s_current_load_port
, "current-load-port", 0, 0, 0, scm_current_load_port
);
190 scm_current_load_port ()
192 return scm_cur_loadp
;
195 SCM_PROC(s_set_current_input_port
, "set-current-input-port", 1, 0, 0, scm_set_current_input_port
);
198 scm_set_current_input_port (port
)
201 SCM oinp
= scm_cur_inp
;
202 SCM_ASSERT (SCM_NIMP (port
) && SCM_OPINPORTP (port
), port
, SCM_ARG1
, s_set_current_input_port
);
208 SCM_PROC(s_set_current_output_port
, "set-current-output-port", 1, 0, 0, scm_set_current_output_port
);
211 scm_set_current_output_port (port
)
214 SCM ooutp
= scm_cur_outp
;
215 port
= SCM_COERCE_OUTPORT (port
);
216 SCM_ASSERT (SCM_NIMP (port
) && SCM_OPOUTPORTP (port
), port
, SCM_ARG1
, s_set_current_output_port
);
222 SCM_PROC(s_set_current_error_port
, "set-current-error-port", 1, 0, 0, scm_set_current_error_port
);
225 scm_set_current_error_port (port
)
228 SCM oerrp
= scm_cur_errp
;
229 port
= SCM_COERCE_OUTPORT (port
);
230 SCM_ASSERT (SCM_NIMP (port
) && SCM_OPOUTPORTP (port
), port
, SCM_ARG1
, s_set_current_error_port
);
237 /* {Ports - in general}
241 /* Array of open ports, required for reliable MOVE->FDES etc. */
242 struct scm_port_table
**scm_port_table
;
244 int scm_port_table_size
= 0; /* Number of ports in scm_port_table. */
245 int scm_port_table_room
= 20; /* Size of the array. */
247 /* Add a port to the table. Call with SCM_DEFER_INTS active. */
249 struct scm_port_table
*
250 scm_add_to_port_table (port
)
253 if (scm_port_table_size
== scm_port_table_room
)
255 scm_port_table
= ((struct scm_port_table
**)
256 realloc ((char *) scm_port_table
,
257 (scm_sizet
) (sizeof (struct scm_port_table
*)
258 * scm_port_table_room
* 2)));
259 /* !!! error checking */
260 scm_port_table_room
*= 2;
262 scm_port_table
[scm_port_table_size
] = ((struct scm_port_table
*)
263 scm_must_malloc (sizeof (struct scm_port_table
),
264 "system port table"));
265 scm_port_table
[scm_port_table_size
]->port
= port
;
266 scm_port_table
[scm_port_table_size
]->revealed
= 0;
267 scm_port_table
[scm_port_table_size
]->stream
= 0;
268 scm_port_table
[scm_port_table_size
]->file_name
= SCM_BOOL_F
;
269 scm_port_table
[scm_port_table_size
]->line_number
= 0;
270 scm_port_table
[scm_port_table_size
]->column_number
= 0;
271 return scm_port_table
[scm_port_table_size
++];
274 /* Remove a port from the table. Call with SCM_DEFER_INTS active. */
277 scm_remove_from_port_table (port
)
281 while (scm_port_table
[i
]->port
!= port
)
284 /* Error if not found: too violent? May occur in GC. */
285 if (i
>= scm_port_table_size
)
286 scm_wta (port
, "Port not in table", "scm_remove_from_port_table");
288 scm_must_free ((char *)scm_port_table
[i
]);
289 scm_mallocated
-= sizeof (*scm_port_table
[i
]);
290 scm_port_table
[i
] = scm_port_table
[scm_port_table_size
- 1];
291 SCM_SETPTAB_ENTRY (port
, 0);
292 scm_port_table_size
--;
296 /* Undocumented functions for debugging. */
297 /* Return the number of ports in the table. */
299 SCM_PROC(s_pt_size
, "pt-size", 0, 0, 0, scm_pt_size
);
303 return SCM_MAKINUM (scm_port_table_size
);
306 /* Return the ith member of the port table. */
307 SCM_PROC(s_pt_member
, "pt-member", 1, 0, 0, scm_pt_member
);
309 scm_pt_member (member
)
313 SCM_ASSERT (SCM_INUMP (member
), member
, SCM_ARG1
, s_pt_member
);
314 i
= SCM_INUM (member
);
315 if (i
< 0 || i
>= scm_port_table_size
)
318 return scm_port_table
[i
]->port
;
323 /* Find a port in the table and return its revealed count.
324 Also used by the garbage collector.
328 scm_revealed_count (port
)
331 return SCM_REVEALED(port
);
336 /* Return the revealed count for a port. */
338 SCM_PROC(s_port_revealed
, "port-revealed", 1, 0, 0, scm_port_revealed
);
341 scm_port_revealed (port
)
344 port
= SCM_COERCE_OUTPORT (port
);
345 SCM_ASSERT (SCM_NIMP (port
) && SCM_PORTP (port
), port
, SCM_ARG1
, s_port_revealed
);
346 return SCM_MAKINUM (scm_revealed_count (port
));
349 /* Set the revealed count for a port. */
350 SCM_PROC(s_set_port_revealed_x
, "set-port-revealed!", 2, 0, 0, scm_set_port_revealed_x
);
353 scm_set_port_revealed_x (port
, rcount
)
357 port
= SCM_COERCE_OUTPORT (port
);
358 SCM_ASSERT (SCM_NIMP (port
) && SCM_PORTP (port
), port
, SCM_ARG1
, s_set_port_revealed_x
);
359 SCM_ASSERT (SCM_INUMP (rcount
), rcount
, SCM_ARG2
, s_set_port_revealed_x
);
361 SCM_REVEALED (port
) = SCM_INUM (rcount
);
363 return SCM_UNSPECIFIED
;
366 /* Return the flags that characterize a port based on the mode
367 * string used to open a file for that port.
369 * See PORT FLAGS in scm.h
373 scm_mode_bits (modes
)
377 | (strchr (modes
, 'r') || strchr (modes
, '+') ? SCM_RDNG
: 0)
378 | ( strchr (modes
, 'w')
379 || strchr (modes
, 'a')
380 || strchr (modes
, '+') ? SCM_WRTNG
: 0)
381 | (strchr (modes
, '0') ? SCM_BUF0
: 0));
385 /* Return the mode flags from an open port.
386 * Some modes such as "append" are only used when opening
387 * a file and are not returned here. */
389 SCM_PROC(s_port_mode
, "port-mode", 1, 0, 0, scm_port_mode
);
398 port
= SCM_COERCE_OUTPORT (port
);
399 SCM_ASSERT (SCM_NIMP (port
) && SCM_OPPORTP (port
), port
, SCM_ARG1
, s_port_mode
);
400 if (SCM_CAR (port
) & SCM_RDNG
) {
401 if (SCM_CAR (port
) & SCM_WRTNG
)
402 strcpy (modes
, "r+");
406 else if (SCM_CAR (port
) & SCM_WRTNG
)
408 if (SCM_CAR (port
) & SCM_BUF0
)
410 return scm_makfromstr (modes
, strlen (modes
), 0);
415 * Call the close operation on a port object.
416 * see also scm_close.
418 SCM_PROC(s_close_port
, "close-port", 1, 0, 0, scm_close_port
);
421 scm_close_port (port
)
427 port
= SCM_COERCE_OUTPORT (port
);
429 SCM_ASSERT (SCM_NIMP (port
) && SCM_PORTP (port
), port
, SCM_ARG1
,
431 if (SCM_CLOSEDP (port
))
433 i
= SCM_PTOBNUM (port
);
435 if (scm_ptobs
[i
].fclose
)
437 SCM_SYSCALL (rv
= (scm_ptobs
[i
].fclose
) (SCM_STREAM (port
)));
438 /* ports with a closed file descriptor can be reclosed without error. */
439 if (rv
< 0 && errno
!= EBADF
)
440 scm_syserror (s_close_port
);
444 scm_remove_from_port_table (port
);
445 SCM_SETAND_CAR (port
, ~SCM_OPN
);
447 return (rv
< 0) ? SCM_BOOL_F
: SCM_BOOL_T
;
450 SCM_PROC(s_close_all_ports_except
, "close-all-ports-except", 0, 0, 1, scm_close_all_ports_except
);
453 scm_close_all_ports_except (ports
)
457 SCM_ASSERT (SCM_NIMP (ports
) && SCM_CONSP (ports
), ports
, SCM_ARG1
, s_close_all_ports_except
);
459 while (i
< scm_port_table_size
)
461 SCM thisport
= scm_port_table
[i
]->port
;
463 SCM ports_ptr
= ports
;
465 while (SCM_NNULLP (ports_ptr
))
467 SCM port
= SCM_COERCE_OUTPORT (SCM_CAR (ports_ptr
));
469 SCM_ASSERT (SCM_NIMP (port
) && SCM_OPPORTP (port
), port
, SCM_ARG1
, s_close_all_ports_except
);
470 if (port
== thisport
)
472 ports_ptr
= SCM_CDR (ports_ptr
);
477 /* i is not to be incremented here. */
478 scm_close_port (thisport
);
481 return SCM_UNSPECIFIED
;
484 SCM_PROC(s_input_port_p
, "input-port?", 1, 0, 0, scm_input_port_p
);
492 return SCM_INPORTP (x
) ? SCM_BOOL_T
: SCM_BOOL_F
;
495 SCM_PROC(s_output_port_p
, "output-port?", 1, 0, 0, scm_output_port_p
);
498 scm_output_port_p (x
)
503 return SCM_OUTPORTP (x
) ? SCM_BOOL_T
: SCM_BOOL_F
;
507 SCM_PROC(s_eof_object_p
, "eof-object?", 1, 0, 0, scm_eof_object_p
);
513 return SCM_EOF_OBJECT_P (x
) ? SCM_BOOL_T
: SCM_BOOL_F
;
516 SCM_PROC(s_force_output
, "force-output", 0, 1, 0, scm_force_output
);
519 scm_force_output (port
)
522 if (SCM_UNBNDP (port
))
526 port
= SCM_COERCE_OUTPORT (port
);
527 SCM_ASSERT (SCM_NIMP (port
) && SCM_OPOUTPORTP (port
), port
, SCM_ARG1
, s_force_output
);
530 scm_sizet i
= SCM_PTOBNUM (port
);
531 SCM_SYSCALL ((scm_ptobs
[i
].fflush
) (SCM_STREAM (port
)));
532 return SCM_UNSPECIFIED
;
536 SCM_PROC (s_flush_all_ports
, "flush-all-ports", 0, 0, 0, scm_flush_all_ports
);
538 scm_flush_all_ports (void)
542 for (i
= 0; i
< scm_port_table_size
; i
++)
544 SCM port
= scm_port_table
[i
]->port
;
545 if (SCM_OPOUTPORTP (port
))
547 scm_sizet ptob
= SCM_PTOBNUM (port
);
548 (scm_ptobs
[ptob
].fflush
) (SCM_STREAM (port
));
551 return SCM_UNSPECIFIED
;
554 SCM_PROC(s_read_char
, "read-char", 0, 1, 0, scm_read_char
);
561 if (SCM_UNBNDP (port
))
564 SCM_ASSERT (SCM_NIMP (port
) && SCM_OPINPORTP (port
), port
, SCM_ARG1
, s_read_char
);
568 return SCM_MAKICHR (c
);
572 SCM_PROC(s_peek_char
, "peek-char", 0, 1, 0, scm_peek_char
);
579 if (SCM_UNBNDP (port
))
582 SCM_ASSERT (SCM_NIMP (port
) && SCM_OPINPORTP (port
), port
, SCM_ARG1
, s_peek_char
);
586 scm_ungetc (c
, port
);
587 return SCM_MAKICHR (c
);
591 * A generic fgets method. We supply this method so that ports which
592 * can't use fgets(3) (like string ports or soft ports) can still use
593 * line-based i/o. The generic method calls the port's own fgetc method
594 * for input. It should be possible to write a more efficient
595 * method for any given port representation -- this is supplied just
596 * to ensure that you don't have to.
599 char * scm_generic_fgets
SCM_P ((SCM port
, int *len
));
602 scm_generic_fgets (port
, len
)
606 SCM f
= SCM_STREAM (port
);
607 scm_sizet p
= SCM_PTOBNUM (port
);
610 int limit
= 80; /* current size of buffer */
613 /* FIXME: It would be nice to be able to check for EOF before anything. */
616 buf
= (char *) malloc (limit
* sizeof(char));
618 /* If a char has been pushed onto the port with scm_ungetc,
620 if (SCM_CRDYP (port
))
622 buf
[*len
] = SCM_CGETUN (port
);
624 if (buf
[(*len
)++] == '\n')
634 buf
= (char *) realloc (buf
, sizeof(char) * limit
* 2);
638 c
= (scm_ptobs
[p
].fgetc
) (f
);
642 if (c
== EOF
|| c
== '\n')
655 SCM_PROC (s_unread_char
, "unread-char", 2, 0, 0, scm_unread_char
);
658 scm_unread_char (cobj
, port
)
664 SCM_ASSERT (SCM_ICHRP (cobj
), cobj
, SCM_ARG1
, s_unread_char
);
666 if (SCM_UNBNDP (port
))
669 SCM_ASSERT (SCM_NIMP (port
) && SCM_OPINPORTP (port
), port
, SCM_ARG2
, s_unread_char
);
674 scm_ungetc (c
, port
);
678 SCM_PROC (s_port_line
, "port-line", 1, 0, 0, scm_port_line
);
684 port
= SCM_COERCE_OUTPORT (port
);
685 SCM_ASSERT (SCM_NIMP (port
) && SCM_PORTP (port
) && SCM_OPENP (port
),
689 return SCM_MAKINUM (SCM_LINUM (port
));
692 SCM_PROC (s_set_port_line_x
, "set-port-line!", 2, 0, 0, scm_set_port_line_x
);
695 scm_set_port_line_x (port
, line
)
699 port
= SCM_COERCE_OUTPORT (port
);
700 SCM_ASSERT (SCM_NIMP (port
) && SCM_PORTP (port
) && SCM_OPENP (port
),
704 SCM_ASSERT (SCM_INUMP (line
), line
, SCM_ARG2
, s_set_port_line_x
);
705 return SCM_PTAB_ENTRY (port
)->line_number
= SCM_INUM (line
);
708 SCM_PROC (s_port_column
, "port-column", 1, 0, 0, scm_port_column
);
711 scm_port_column (port
)
714 port
= SCM_COERCE_OUTPORT (port
);
715 SCM_ASSERT (SCM_NIMP (port
) && SCM_PORTP (port
) && SCM_OPENP (port
),
719 return SCM_MAKINUM (SCM_COL (port
));
722 SCM_PROC (s_set_port_column_x
, "set-port-column!", 2, 0, 0, scm_set_port_column_x
);
725 scm_set_port_column_x (port
, column
)
729 port
= SCM_COERCE_OUTPORT (port
);
730 SCM_ASSERT (SCM_NIMP (port
) && SCM_PORTP (port
) && SCM_OPENP (port
),
733 s_set_port_column_x
);
734 SCM_ASSERT (SCM_INUMP (column
), column
, SCM_ARG2
, s_set_port_column_x
);
735 return SCM_PTAB_ENTRY (port
)->column_number
= SCM_INUM (column
);
738 SCM_PROC (s_port_filename
, "port-filename", 1, 0, 0, scm_port_filename
);
741 scm_port_filename (port
)
744 port
= SCM_COERCE_OUTPORT (port
);
745 SCM_ASSERT (SCM_NIMP (port
) && SCM_PORTP (port
) && SCM_OPENP (port
),
749 return SCM_PTAB_ENTRY (port
)->file_name
;
752 SCM_PROC (s_set_port_filename_x
, "set-port-filename!", 2, 0, 0, scm_set_port_filename_x
);
755 scm_set_port_filename_x (port
, filename
)
759 port
= SCM_COERCE_OUTPORT (port
);
760 SCM_ASSERT (SCM_NIMP (port
) && SCM_PORTP (port
) && SCM_OPENP (port
),
763 s_set_port_filename_x
);
764 /* We allow the user to set the filename to whatever he likes. */
765 return SCM_PTAB_ENTRY (port
)->file_name
= filename
;
769 extern char * ttyname();
774 scm_prinport (exp
, port
, type
)
779 scm_puts ("#<", port
);
780 if (SCM_CLOSEDP (exp
))
781 scm_puts ("closed: ", port
);
784 if (SCM_RDNG
& SCM_CAR (exp
))
785 scm_puts ("input: ", port
);
786 if (SCM_WRTNG
& SCM_CAR (exp
))
787 scm_puts ("output: ", port
);
789 scm_puts (type
, port
);
790 scm_putc (' ', port
);
796 if (SCM_OPENP (exp
) && scm_tc16_fport
== SCM_TYP16 (exp
) && isatty (fileno ((FILE *)SCM_STREAM (exp
))))
797 scm_puts (ttyname (fileno ((FILE *)SCM_STREAM (exp
))), port
);
804 if (SCM_OPFPORTP (exp
))
805 scm_intprint ((long) fileno ((FILE *)SCM_STREAM (exp
)), 10, port
);
807 scm_intprint (SCM_CDR (exp
), 16, port
);
808 scm_putc ('>', port
);
813 scm_ports_prehistory ()
816 scm_ptobs
= (scm_ptobfuns
*) malloc (sizeof (scm_ptobfuns
));
818 /* WARNING: These scm_newptob calls must be done in this order.
819 * They must agree with the port declarations in tags.h.
821 /* scm_tc16_fport = */ scm_newptob (&scm_fptob
);
822 /* scm_tc16_pipe = */ scm_newptob (&scm_pipob
);
823 /* scm_tc16_strport = */ scm_newptob (&scm_stptob
);
824 /* scm_tc16_sfport = */ scm_newptob (&scm_sfptob
);
832 int scm_tc16_void_port
= 0;
835 print_void_port (SCM exp
, SCM port
, scm_print_state
*pstate
)
837 scm_prinport (exp
, port
, "void");
842 putc_void_port (int c
, SCM strm
)
844 return 0; /* vestigial return value */
848 puts_void_port (char *s
, SCM strm
)
850 return 0; /* vestigial return value */
854 write_void_port (char *ptr
, scm_sizet size
, scm_sizet nitems
, SCM strm
)
863 flush_void_port (SCM strm
)
870 getc_void_port (SCM strm
)
876 fgets_void_port (SCM strm
, int *len
)
882 close_void_port (SCM strm
)
884 return 0; /* this is ignored by scm_close_port. */
896 static struct scm_ptobfuns void_port_ptob
=
915 scm_void_port (mode_str
)
920 struct scm_port_table
* pt
;
922 SCM_NEWCELL (answer
);
924 mode_bits
= scm_mode_bits (mode_str
);
925 pt
= scm_add_to_port_table (answer
);
926 SCM_SETCAR (answer
, scm_tc16_void_port
| mode_bits
);
927 SCM_SETPTAB_ENTRY (answer
, pt
);
928 SCM_SETSTREAM (answer
, SCM_BOOL_F
);
934 SCM_PROC (s_sys_make_void_port
, "%make-void-port", 1, 0, 0, scm_sys_make_void_port
);
937 scm_sys_make_void_port (mode
)
940 SCM_ASSERT (SCM_NIMP (mode
) && SCM_ROSTRINGP (mode
), mode
,
941 SCM_ARG1
, s_sys_make_void_port
);
943 SCM_COERCE_SUBSTR (mode
);
944 return scm_void_port (SCM_ROCHARS (mode
));
955 scm_tc16_void_port
= scm_newptob (&void_port_ptob
);