1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003, 2004 Free Software Foundation, Inc.
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.
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.
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
29 #include "libguile/_scm.h"
30 #include "libguile/eval.h"
31 #include "libguile/objects.h"
32 #include "libguile/smob.h"
33 #include "libguile/chars.h"
34 #include "libguile/dynwind.h"
36 #include "libguile/keywords.h"
37 #include "libguile/root.h"
38 #include "libguile/strings.h"
39 #include "libguile/mallocs.h"
40 #include "libguile/validate.h"
41 #include "libguile/ports.h"
59 #ifdef HAVE_SYS_IOCTL_H
60 #include <sys/ioctl.h>
65 #define ftruncate(fd, size) chsize (fd, size)
69 /* The port kind table --- a dynamically resized array of port types. */
72 /* scm_ptobs scm_numptob
73 * implement a dynamicly resized array of ptob records.
74 * Indexes into this table are used when generating type
75 * tags for smobjects (if you know a tag you can get an index and conversely).
77 scm_t_ptob_descriptor
*scm_ptobs
;
80 /* GC marker for a port with stream of SCM type. */
82 scm_markstream (SCM ptr
)
85 openp
= SCM_CELL_WORD_0 (ptr
) & SCM_OPN
;
87 return SCM_PACK (SCM_STREAM (ptr
));
93 * We choose to use an interface similar to the smob interface with
94 * fill_input and write as standard fields, passed to the port
95 * type constructor, and optional fields set by setters.
99 flush_port_default (SCM port SCM_UNUSED
)
104 end_input_default (SCM port SCM_UNUSED
, int offset SCM_UNUSED
)
109 scm_port_free0 (SCM port
)
115 scm_make_port_type (char *name
,
116 int (*fill_input
) (SCM port
),
117 void (*write
) (SCM port
, const void *data
, size_t size
))
120 if (255 <= scm_numptob
)
123 SCM_SYSCALL (tmp
= (char *) realloc ((char *) scm_ptobs
,
125 * sizeof (scm_t_ptob_descriptor
)));
128 scm_ptobs
= (scm_t_ptob_descriptor
*) tmp
;
130 scm_ptobs
[scm_numptob
].name
= name
;
131 scm_ptobs
[scm_numptob
].mark
= 0;
132 scm_ptobs
[scm_numptob
].free
= scm_port_free0
;
133 scm_ptobs
[scm_numptob
].print
= scm_port_print
;
134 scm_ptobs
[scm_numptob
].equalp
= 0;
135 scm_ptobs
[scm_numptob
].close
= 0;
137 scm_ptobs
[scm_numptob
].write
= write
;
138 scm_ptobs
[scm_numptob
].flush
= flush_port_default
;
140 scm_ptobs
[scm_numptob
].end_input
= end_input_default
;
141 scm_ptobs
[scm_numptob
].fill_input
= fill_input
;
142 scm_ptobs
[scm_numptob
].input_waiting
= 0;
144 scm_ptobs
[scm_numptob
].seek
= 0;
145 scm_ptobs
[scm_numptob
].truncate
= 0;
153 scm_memory_error ("scm_make_port_type");
155 /* Make a class object if Goops is present */
157 scm_make_port_classes (scm_numptob
- 1, SCM_PTOBNAME (scm_numptob
- 1));
158 return scm_tc7_port
+ (scm_numptob
- 1) * 256;
162 scm_set_port_mark (long tc
, SCM (*mark
) (SCM
))
164 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].mark
= mark
;
168 scm_set_port_free (long tc
, size_t (*free
) (SCM
))
170 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].free
= free
;
174 scm_set_port_print (long tc
, int (*print
) (SCM exp
, SCM port
,
175 scm_print_state
*pstate
))
177 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].print
= print
;
181 scm_set_port_equalp (long tc
, SCM (*equalp
) (SCM
, SCM
))
183 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].equalp
= equalp
;
187 scm_set_port_flush (long tc
, void (*flush
) (SCM port
))
189 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].flush
= flush
;
193 scm_set_port_end_input (long tc
, void (*end_input
) (SCM port
, int offset
))
195 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].end_input
= end_input
;
199 scm_set_port_close (long tc
, int (*close
) (SCM
))
201 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].close
= close
;
205 scm_set_port_seek (long tc
, off_t (*seek
) (SCM port
,
209 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].seek
= seek
;
213 scm_set_port_truncate (long tc
, void (*truncate
) (SCM port
, off_t length
))
215 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].truncate
= truncate
;
219 scm_set_port_input_waiting (long tc
, int (*input_waiting
) (SCM
))
221 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].input_waiting
= input_waiting
;
226 SCM_DEFINE (scm_char_ready_p
, "char-ready?", 0, 1, 0,
228 "Return @code{#t} if a character is ready on input @var{port}\n"
229 "and return @code{#f} otherwise. If @code{char-ready?} returns\n"
230 "@code{#t} then the next @code{read-char} operation on\n"
231 "@var{port} is guaranteed not to hang. If @var{port} is a file\n"
232 "port at end of file then @code{char-ready?} returns @code{#t}.\n"
234 "@code{char-ready?} exists to make it possible for a\n"
235 "program to accept characters from interactive ports without\n"
236 "getting stuck waiting for input. Any input editors associated\n"
237 "with such ports must make sure that characters whose existence\n"
238 "has been asserted by @code{char-ready?} cannot be rubbed out.\n"
239 "If @code{char-ready?} were to return @code{#f} at end of file,\n"
240 "a port at end of file would be indistinguishable from an\n"
241 "interactive port that has no ready characters.")
242 #define FUNC_NAME s_scm_char_ready_p
246 if (SCM_UNBNDP (port
))
249 SCM_VALIDATE_OPINPORT (1, port
);
251 pt
= SCM_PTAB_ENTRY (port
);
253 /* if the current read buffer is filled, or the
254 last pushed-back char has been read and the saved buffer is
255 filled, result is true. */
256 if (pt
->read_pos
< pt
->read_end
257 || (pt
->read_buf
== pt
->putback_buf
258 && pt
->saved_read_pos
< pt
->saved_read_end
))
262 scm_t_ptob_descriptor
*ptob
= &scm_ptobs
[SCM_PTOBNUM (port
)];
264 if (ptob
->input_waiting
)
265 return scm_from_bool(ptob
->input_waiting (port
));
272 /* move up to read_len chars from port's putback and/or read buffers
273 into memory starting at dest. returns the number of chars moved. */
274 size_t scm_take_from_input_buffers (SCM port
, char *dest
, size_t read_len
)
276 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
277 size_t chars_read
= 0;
278 size_t from_buf
= min (pt
->read_end
- pt
->read_pos
, read_len
);
282 memcpy (dest
, pt
->read_pos
, from_buf
);
283 pt
->read_pos
+= from_buf
;
284 chars_read
+= from_buf
;
285 read_len
-= from_buf
;
289 /* if putback was active, try the real input buffer too. */
290 if (pt
->read_buf
== pt
->putback_buf
)
292 from_buf
= min (pt
->saved_read_end
- pt
->saved_read_pos
, read_len
);
295 memcpy (dest
, pt
->saved_read_pos
, from_buf
);
296 pt
->saved_read_pos
+= from_buf
;
297 chars_read
+= from_buf
;
303 /* Clear a port's read buffers, returning the contents. */
304 SCM_DEFINE (scm_drain_input
, "drain-input", 1, 0, 0,
306 "This procedure clears a port's input buffers, similar\n"
307 "to the way that force-output clears the output buffer. The\n"
308 "contents of the buffers are returned as a single string, e.g.,\n"
311 "(define p (open-input-file ...))\n"
312 "(drain-input p) => empty string, nothing buffered yet.\n"
313 "(unread-char (read-char p) p)\n"
314 "(drain-input p) => initial chars from p, up to the buffer size.\n"
316 "Draining the buffers may be useful for cleanly finishing\n"
317 "buffered I/O so that the file descriptor can be used directly\n"
318 "for further input.")
319 #define FUNC_NAME s_scm_drain_input
325 SCM_VALIDATE_OPINPORT (1, port
);
326 pt
= SCM_PTAB_ENTRY (port
);
328 count
= pt
->read_end
- pt
->read_pos
;
329 if (pt
->read_buf
== pt
->putback_buf
)
330 count
+= pt
->saved_read_end
- pt
->saved_read_pos
;
332 result
= scm_allocate_string (count
);
333 scm_take_from_input_buffers (port
, SCM_STRING_CHARS (result
), count
);
340 /* Standard ports --- current input, output, error, and more(!). */
342 SCM_DEFINE (scm_current_input_port
, "current-input-port", 0, 0, 0,
344 "Return the current input port. This is the default port used\n"
345 "by many input procedures. Initially, @code{current-input-port}\n"
346 "returns the @dfn{standard input} in Unix and C terminology.")
347 #define FUNC_NAME s_scm_current_input_port
353 SCM_DEFINE (scm_current_output_port
, "current-output-port", 0, 0, 0,
355 "Return the current output port. This is the default port used\n"
356 "by many output procedures. Initially,\n"
357 "@code{current-output-port} returns the @dfn{standard output} in\n"
358 "Unix and C terminology.")
359 #define FUNC_NAME s_scm_current_output_port
365 SCM_DEFINE (scm_current_error_port
, "current-error-port", 0, 0, 0,
367 "Return the port to which errors and warnings should be sent (the\n"
368 "@dfn{standard error} in Unix and C terminology).")
369 #define FUNC_NAME s_scm_current_error_port
375 SCM_DEFINE (scm_current_load_port
, "current-load-port", 0, 0, 0,
377 "Return the current-load-port.\n"
378 "The load port is used internally by @code{primitive-load}.")
379 #define FUNC_NAME s_scm_current_load_port
381 return scm_cur_loadp
;
385 SCM_DEFINE (scm_set_current_input_port
, "set-current-input-port", 1, 0, 0,
387 "@deffnx {Scheme Procedure} set-current-output-port port\n"
388 "@deffnx {Scheme Procedure} set-current-error-port port\n"
389 "Change the ports returned by @code{current-input-port},\n"
390 "@code{current-output-port} and @code{current-error-port}, respectively,\n"
391 "so that they use the supplied @var{port} for input or output.")
392 #define FUNC_NAME s_scm_set_current_input_port
394 SCM oinp
= scm_cur_inp
;
395 SCM_VALIDATE_OPINPORT (1, port
);
402 SCM_DEFINE (scm_set_current_output_port
, "set-current-output-port", 1, 0, 0,
404 "Set the current default output port to @var{port}.")
405 #define FUNC_NAME s_scm_set_current_output_port
407 SCM ooutp
= scm_cur_outp
;
408 port
= SCM_COERCE_OUTPORT (port
);
409 SCM_VALIDATE_OPOUTPORT (1, port
);
416 SCM_DEFINE (scm_set_current_error_port
, "set-current-error-port", 1, 0, 0,
418 "Set the current default error port to @var{port}.")
419 #define FUNC_NAME s_scm_set_current_error_port
421 SCM oerrp
= scm_cur_errp
;
422 port
= SCM_COERCE_OUTPORT (port
);
423 SCM_VALIDATE_OPOUTPORT (1, port
);
431 SCM (*getter
) (void);
436 swap_port (SCM scm_data
)
438 swap_data
*d
= (swap_data
*)SCM_MALLOCDATA (scm_data
);
442 d
->setter (d
->value
);
447 scm_frame_current_foo_port (SCM port
,
448 SCM (*getter
) (void), SCM (*setter
) (SCM
))
450 SCM scm_data
= scm_malloc_obj (sizeof (swap_data
));
451 swap_data
*data
= (swap_data
*)SCM_MALLOCDATA (scm_data
);
453 data
->getter
= getter
;
454 data
->setter
= setter
;
456 scm_frame_rewind_handler_with_scm (swap_port
, scm_data
,
457 SCM_F_WIND_EXPLICITLY
);
458 scm_frame_unwind_handler_with_scm (swap_port
, scm_data
,
459 SCM_F_WIND_EXPLICITLY
);
463 scm_frame_current_input_port (SCM port
)
465 scm_frame_current_foo_port (port
,
466 scm_current_input_port
,
467 scm_set_current_input_port
);
471 scm_frame_current_output_port (SCM port
)
473 scm_frame_current_foo_port (port
,
474 scm_current_output_port
,
475 scm_set_current_output_port
);
479 scm_frame_current_error_port (SCM port
)
481 scm_frame_current_foo_port (port
,
482 scm_current_error_port
,
483 scm_set_current_error_port
);
487 /* The port table --- an array of pointers to ports. */
489 scm_t_port
**scm_i_port_table
;
491 long scm_i_port_table_size
= 0; /* Number of ports in scm_i_port_table. */
492 long scm_i_port_table_room
= 20; /* Size of the array. */
494 SCM_GLOBAL_MUTEX (scm_i_port_table_mutex
);
496 /* This function is not and should not be thread safe. */
499 scm_new_port_table_entry (scm_t_bits tag
)
500 #define FUNC_NAME "scm_new_port_table_entry"
503 We initialize the cell to empty, this is in case scm_gc_calloc
504 triggers GC ; we don't want the GC to scan a half-finished Z.
507 SCM z
= scm_cons (SCM_EOL
, SCM_EOL
);
508 scm_t_port
*entry
= (scm_t_port
*) scm_gc_calloc (sizeof (scm_t_port
), "port");
509 if (scm_i_port_table_size
== scm_i_port_table_room
)
511 /* initial malloc is in gc.c. this doesn't use scm_gc_malloc etc.,
512 since it can never be freed during gc. */
513 void *newt
= scm_realloc ((char *) scm_i_port_table
,
514 (size_t) (sizeof (scm_t_port
*)
515 * scm_i_port_table_room
* 2));
516 scm_i_port_table
= (scm_t_port
**) newt
;
517 scm_i_port_table_room
*= 2;
520 entry
->entry
= scm_i_port_table_size
;
522 entry
->file_name
= SCM_BOOL_F
;
523 entry
->rw_active
= SCM_PORT_NEITHER
;
525 scm_i_port_table
[scm_i_port_table_size
] = entry
;
526 scm_i_port_table_size
++;
529 SCM_SET_CELL_TYPE(z
, tag
);
530 SCM_SETPTAB_ENTRY(z
, entry
);
536 #if SCM_ENABLE_DEPRECATED==1
538 scm_add_to_port_table (SCM port
)
540 SCM z
= scm_new_port_table_entry (scm_tc7_port
);
541 scm_t_port
* pt
= SCM_PTAB_ENTRY(z
);
544 SCM_SETCAR(z
, SCM_EOL
);
545 SCM_SETCDR(z
, SCM_EOL
);
546 SCM_SETPTAB_ENTRY (port
, pt
);
552 /* Remove a port from the table and destroy it. */
554 /* This function is not and should not be thread safe. */
557 scm_remove_from_port_table (SCM port
)
558 #define FUNC_NAME "scm_remove_from_port_table"
560 scm_t_port
*p
= SCM_PTAB_ENTRY (port
);
563 if (i
>= scm_i_port_table_size
)
564 SCM_MISC_ERROR ("Port not in table: ~S", scm_list_1 (port
));
566 scm_gc_free (p
->putback_buf
, p
->putback_buf_size
, "putback buffer");
567 scm_gc_free (p
, sizeof (scm_t_port
), "port");
568 /* Since we have just freed slot i we can shrink the table by moving
569 the last entry to that slot... */
570 if (i
< scm_i_port_table_size
- 1)
572 scm_i_port_table
[i
] = scm_i_port_table
[scm_i_port_table_size
- 1];
573 scm_i_port_table
[i
]->entry
= i
;
575 SCM_SETPTAB_ENTRY (port
, 0);
576 scm_i_port_table_size
--;
582 /* Functions for debugging. */
584 SCM_DEFINE (scm_pt_size
, "pt-size", 0, 0, 0,
586 "Return the number of ports in the port table. @code{pt-size}\n"
587 "is only included in @code{--enable-guile-debug} builds.")
588 #define FUNC_NAME s_scm_pt_size
590 return scm_from_int (scm_i_port_table_size
);
594 SCM_DEFINE (scm_pt_member
, "pt-member", 1, 0, 0,
596 "Return the port at @var{index} in the port table.\n"
597 "@code{pt-member} is only included in\n"
598 "@code{--enable-guile-debug} builds.")
599 #define FUNC_NAME s_scm_pt_member
601 size_t i
= scm_to_size_t (index
);
602 if (i
>= scm_i_port_table_size
)
605 return scm_i_port_table
[i
]->port
;
611 scm_port_non_buffer (scm_t_port
*pt
)
613 pt
->read_pos
= pt
->read_buf
= pt
->read_end
= &pt
->shortbuf
;
614 pt
->write_buf
= pt
->write_pos
= &pt
->shortbuf
;
615 pt
->read_buf_size
= pt
->write_buf_size
= 1;
616 pt
->write_end
= pt
->write_buf
+ pt
->write_buf_size
;
620 /* Revealed counts --- an oddity inherited from SCSH. */
622 /* Find a port in the table and return its revealed count.
623 Also used by the garbage collector.
627 scm_revealed_count (SCM port
)
629 return SCM_REVEALED(port
);
634 /* Return the revealed count for a port. */
636 SCM_DEFINE (scm_port_revealed
, "port-revealed", 1, 0, 0,
638 "Return the revealed count for @var{port}.")
639 #define FUNC_NAME s_scm_port_revealed
641 port
= SCM_COERCE_OUTPORT (port
);
642 SCM_VALIDATE_OPENPORT (1, port
);
643 return scm_from_int (scm_revealed_count (port
));
647 /* Set the revealed count for a port. */
648 SCM_DEFINE (scm_set_port_revealed_x
, "set-port-revealed!", 2, 0, 0,
649 (SCM port
, SCM rcount
),
650 "Sets the revealed count for a port to a given value.\n"
651 "The return value is unspecified.")
652 #define FUNC_NAME s_scm_set_port_revealed_x
654 port
= SCM_COERCE_OUTPORT (port
);
655 SCM_VALIDATE_OPENPORT (1, port
);
656 SCM_REVEALED (port
) = scm_to_int (rcount
);
657 return SCM_UNSPECIFIED
;
663 /* Retrieving a port's mode. */
665 /* Return the flags that characterize a port based on the mode
666 * string used to open a file for that port.
668 * See PORT FLAGS in scm.h
672 scm_mode_bits (char *modes
)
675 | (strchr (modes
, 'r') || strchr (modes
, '+') ? SCM_RDNG
: 0)
676 | ( strchr (modes
, 'w')
677 || strchr (modes
, 'a')
678 || strchr (modes
, '+') ? SCM_WRTNG
: 0)
679 | (strchr (modes
, '0') ? SCM_BUF0
: 0)
680 | (strchr (modes
, 'l') ? SCM_BUFLINE
: 0));
684 /* Return the mode flags from an open port.
685 * Some modes such as "append" are only used when opening
686 * a file and are not returned here. */
688 SCM_DEFINE (scm_port_mode
, "port-mode", 1, 0, 0,
690 "Return the port modes associated with the open port @var{port}.\n"
691 "These will not necessarily be identical to the modes used when\n"
692 "the port was opened, since modes such as \"append\" which are\n"
693 "used only during port creation are not retained.")
694 #define FUNC_NAME s_scm_port_mode
699 port
= SCM_COERCE_OUTPORT (port
);
700 SCM_VALIDATE_OPPORT (1, port
);
701 if (SCM_CELL_WORD_0 (port
) & SCM_RDNG
) {
702 if (SCM_CELL_WORD_0 (port
) & SCM_WRTNG
)
703 strcpy (modes
, "r+");
707 else if (SCM_CELL_WORD_0 (port
) & SCM_WRTNG
)
709 if (SCM_CELL_WORD_0 (port
) & SCM_BUF0
)
711 return scm_mem2string (modes
, strlen (modes
));
720 * Call the close operation on a port object.
721 * see also scm_close.
723 SCM_DEFINE (scm_close_port
, "close-port", 1, 0, 0,
725 "Close the specified port object. Return @code{#t} if it\n"
726 "successfully closes a port or @code{#f} if it was already\n"
727 "closed. An exception may be raised if an error occurs, for\n"
728 "example when flushing buffered output. See also @ref{Ports and\n"
729 "File Descriptors, close}, for a procedure which can close file\n"
731 #define FUNC_NAME s_scm_close_port
736 port
= SCM_COERCE_OUTPORT (port
);
738 SCM_VALIDATE_PORT (1, port
);
739 if (SCM_CLOSEDP (port
))
741 i
= SCM_PTOBNUM (port
);
742 if (scm_ptobs
[i
].close
)
743 rv
= (scm_ptobs
[i
].close
) (port
);
746 scm_mutex_lock (&scm_i_port_table_mutex
);
747 scm_remove_from_port_table (port
);
748 scm_mutex_unlock (&scm_i_port_table_mutex
);
749 SCM_CLR_PORT_OPEN_FLAG (port
);
750 return scm_from_bool (rv
>= 0);
754 SCM_DEFINE (scm_close_input_port
, "close-input-port", 1, 0, 0,
756 "Close the specified input port object. The routine has no effect if\n"
757 "the file has already been closed. An exception may be raised if an\n"
758 "error occurs. The value returned is unspecified.\n\n"
759 "See also @ref{Ports and File Descriptors, close}, for a procedure\n"
760 "which can close file descriptors.")
761 #define FUNC_NAME s_scm_close_input_port
763 SCM_VALIDATE_INPUT_PORT (1, port
);
764 scm_close_port (port
);
765 return SCM_UNSPECIFIED
;
769 SCM_DEFINE (scm_close_output_port
, "close-output-port", 1, 0, 0,
771 "Close the specified output port object. The routine has no effect if\n"
772 "the file has already been closed. An exception may be raised if an\n"
773 "error occurs. The value returned is unspecified.\n\n"
774 "See also @ref{Ports and File Descriptors, close}, for a procedure\n"
775 "which can close file descriptors.")
776 #define FUNC_NAME s_scm_close_output_port
778 port
= SCM_COERCE_OUTPORT (port
);
779 SCM_VALIDATE_OUTPUT_PORT (1, port
);
780 scm_close_port (port
);
781 return SCM_UNSPECIFIED
;
786 scm_c_port_for_each (void (*proc
)(void *data
, SCM p
), void *data
)
791 /* Even without pre-emptive multithreading, running arbitrary code
792 while scanning the port table is unsafe because the port table
793 can change arbitrarily (from a GC, for example). So we build a
794 list in advance while blocking the GC. -mvo */
796 scm_mutex_lock (&scm_i_port_table_mutex
);
799 for (i
= 0; i
< scm_i_port_table_size
; i
++)
800 ports
= scm_cons (scm_i_port_table
[i
]->port
, ports
);
802 scm_mutex_unlock (&scm_i_port_table_mutex
);
804 while (ports
!= SCM_EOL
)
806 proc (data
, SCM_CAR (ports
));
807 ports
= SCM_CDR (ports
);
811 SCM_DEFINE (scm_port_for_each
, "port-for-each", 1, 0, 0,
813 "Apply @var{proc} to each port in the Guile port table\n"
814 "in turn. The return value is unspecified. More specifically,\n"
815 "@var{proc} is applied exactly once to every port that exists\n"
816 "in the system at the time @var{port-for-each} is invoked.\n"
817 "Changes to the port table while @var{port-for-each} is running\n"
818 "have no effect as far as @var{port-for-each} is concerned.")
819 #define FUNC_NAME s_scm_port_for_each
821 SCM_VALIDATE_PROC (1, proc
);
823 scm_c_port_for_each ((void (*)(void*,SCM
))scm_call_1
, proc
);
824 return SCM_UNSPECIFIED
;
830 /* Utter miscellany. Gosh, we should clean this up some time. */
832 SCM_DEFINE (scm_input_port_p
, "input-port?", 1, 0, 0,
834 "Return @code{#t} if @var{x} is an input port, otherwise return\n"
835 "@code{#f}. Any object satisfying this predicate also satisfies\n"
837 #define FUNC_NAME s_scm_input_port_p
839 return scm_from_bool (SCM_INPUT_PORT_P (x
));
843 SCM_DEFINE (scm_output_port_p
, "output-port?", 1, 0, 0,
845 "Return @code{#t} if @var{x} is an output port, otherwise return\n"
846 "@code{#f}. Any object satisfying this predicate also satisfies\n"
848 #define FUNC_NAME s_scm_output_port_p
850 x
= SCM_COERCE_OUTPORT (x
);
851 return scm_from_bool (SCM_OUTPUT_PORT_P (x
));
855 SCM_DEFINE (scm_port_p
, "port?", 1, 0, 0,
857 "Return a boolean indicating whether @var{x} is a port.\n"
858 "Equivalent to @code{(or (input-port? @var{x}) (output-port?\n"
860 #define FUNC_NAME s_scm_port_p
862 return scm_from_bool (SCM_PORTP (x
));
866 SCM_DEFINE (scm_port_closed_p
, "port-closed?", 1, 0, 0,
868 "Return @code{#t} if @var{port} is closed or @code{#f} if it is\n"
870 #define FUNC_NAME s_scm_port_closed_p
872 SCM_VALIDATE_PORT (1, port
);
873 return scm_from_bool (!SCM_OPPORTP (port
));
877 SCM_DEFINE (scm_eof_object_p
, "eof-object?", 1, 0, 0,
879 "Return @code{#t} if @var{x} is an end-of-file object; otherwise\n"
881 #define FUNC_NAME s_scm_eof_object_p
883 return scm_from_bool(SCM_EOF_OBJECT_P (x
));
887 SCM_DEFINE (scm_force_output
, "force-output", 0, 1, 0,
889 "Flush the specified output port, or the current output port if @var{port}\n"
890 "is omitted. The current output buffer contents are passed to the\n"
891 "underlying port implementation (e.g., in the case of fports, the\n"
892 "data will be written to the file and the output buffer will be cleared.)\n"
893 "It has no effect on an unbuffered port.\n\n"
894 "The return value is unspecified.")
895 #define FUNC_NAME s_scm_force_output
897 if (SCM_UNBNDP (port
))
901 port
= SCM_COERCE_OUTPORT (port
);
902 SCM_VALIDATE_OPOUTPORT (1, port
);
905 return SCM_UNSPECIFIED
;
909 SCM_DEFINE (scm_flush_all_ports
, "flush-all-ports", 0, 0, 0,
911 "Equivalent to calling @code{force-output} on\n"
912 "all open output ports. The return value is unspecified.")
913 #define FUNC_NAME s_scm_flush_all_ports
917 scm_mutex_lock (&scm_i_port_table_mutex
);
918 for (i
= 0; i
< scm_i_port_table_size
; i
++)
920 if (SCM_OPOUTPORTP (scm_i_port_table
[i
]->port
))
921 scm_flush (scm_i_port_table
[i
]->port
);
923 scm_mutex_unlock (&scm_i_port_table_mutex
);
924 return SCM_UNSPECIFIED
;
928 SCM_DEFINE (scm_read_char
, "read-char", 0, 1, 0,
930 "Return the next character available from @var{port}, updating\n"
931 "@var{port} to point to the following character. If no more\n"
932 "characters are available, the end-of-file object is returned.")
933 #define FUNC_NAME s_scm_read_char
936 if (SCM_UNBNDP (port
))
938 SCM_VALIDATE_OPINPORT (1, port
);
942 return SCM_MAKE_CHAR (c
);
946 /* this should only be called when the read buffer is empty. it
947 tries to refill the read buffer. it returns the first char from
948 the port, which is either EOF or *(pt->read_pos). */
950 scm_fill_input (SCM port
)
952 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
954 if (pt
->read_buf
== pt
->putback_buf
)
956 /* finished reading put-back chars. */
957 pt
->read_buf
= pt
->saved_read_buf
;
958 pt
->read_pos
= pt
->saved_read_pos
;
959 pt
->read_end
= pt
->saved_read_end
;
960 pt
->read_buf_size
= pt
->saved_read_buf_size
;
961 if (pt
->read_pos
< pt
->read_end
)
962 return *(pt
->read_pos
);
964 return scm_ptobs
[SCM_PTOBNUM (port
)].fill_input (port
);
971 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
973 if (pt
->rw_active
== SCM_PORT_WRITE
)
974 /* may be marginally faster than calling scm_flush. */
975 scm_ptobs
[SCM_PTOBNUM (port
)].flush (port
);
978 pt
->rw_active
= SCM_PORT_READ
;
980 if (pt
->read_pos
>= pt
->read_end
)
982 if (scm_fill_input (port
) == EOF
)
986 c
= *(pt
->read_pos
++);
1005 scm_putc (char c
, SCM port
)
1007 scm_lfwrite (&c
, 1, port
);
1011 scm_puts (const char *s
, SCM port
)
1013 scm_lfwrite (s
, strlen (s
), port
);
1018 * This function differs from scm_c_write; it updates port line and
1022 scm_lfwrite (const char *ptr
, size_t size
, SCM port
)
1024 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
1025 scm_t_ptob_descriptor
*ptob
= &scm_ptobs
[SCM_PTOBNUM (port
)];
1027 if (pt
->rw_active
== SCM_PORT_READ
)
1028 scm_end_input (port
);
1030 ptob
->write (port
, ptr
, size
);
1032 for (; size
; ptr
++, size
--) {
1036 else if (*ptr
== '\t') {
1045 pt
->rw_active
= SCM_PORT_WRITE
;
1050 * Used by an application to read arbitrary number of bytes from an
1051 * SCM port. Same semantics as libc read, except that scm_c_read only
1052 * returns less than SIZE bytes if at end-of-file.
1054 * Warning: Doesn't update port line and column counts! */
1057 scm_c_read (SCM port
, void *buffer
, size_t size
)
1059 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
1060 size_t n_read
= 0, n_available
;
1062 if (pt
->rw_active
== SCM_PORT_WRITE
)
1063 scm_ptobs
[SCM_PTOBNUM (port
)].flush (port
);
1066 pt
->rw_active
= SCM_PORT_READ
;
1068 if (SCM_READ_BUFFER_EMPTY_P (pt
))
1070 if (scm_fill_input (port
) == EOF
)
1074 n_available
= pt
->read_end
- pt
->read_pos
;
1076 while (n_available
< size
)
1078 memcpy (buffer
, pt
->read_pos
, n_available
);
1079 buffer
= (char *) buffer
+ n_available
;
1080 pt
->read_pos
+= n_available
;
1081 n_read
+= n_available
;
1083 if (SCM_READ_BUFFER_EMPTY_P (pt
))
1085 if (scm_fill_input (port
) == EOF
)
1089 size
-= n_available
;
1090 n_available
= pt
->read_end
- pt
->read_pos
;
1093 memcpy (buffer
, pt
->read_pos
, size
);
1094 pt
->read_pos
+= size
;
1096 return n_read
+ size
;
1101 * Used by an application to write arbitrary number of bytes to an SCM
1102 * port. Similar semantics as libc write. However, unlike libc
1103 * write, scm_c_write writes the requested number of bytes and has no
1106 * Warning: Doesn't update port line and column counts!
1110 scm_c_write (SCM port
, const void *ptr
, size_t size
)
1112 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
1113 scm_t_ptob_descriptor
*ptob
= &scm_ptobs
[SCM_PTOBNUM (port
)];
1115 if (pt
->rw_active
== SCM_PORT_READ
)
1116 scm_end_input (port
);
1118 ptob
->write (port
, ptr
, size
);
1121 pt
->rw_active
= SCM_PORT_WRITE
;
1125 scm_flush (SCM port
)
1127 long i
= SCM_PTOBNUM (port
);
1128 (scm_ptobs
[i
].flush
) (port
);
1132 scm_end_input (SCM port
)
1135 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
1137 if (pt
->read_buf
== pt
->putback_buf
)
1139 offset
= pt
->read_end
- pt
->read_pos
;
1140 pt
->read_buf
= pt
->saved_read_buf
;
1141 pt
->read_pos
= pt
->saved_read_pos
;
1142 pt
->read_end
= pt
->saved_read_end
;
1143 pt
->read_buf_size
= pt
->saved_read_buf_size
;
1148 scm_ptobs
[SCM_PTOBNUM (port
)].end_input (port
, offset
);
1155 scm_ungetc (int c
, SCM port
)
1156 #define FUNC_NAME "scm_ungetc"
1158 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
1160 if (pt
->read_buf
== pt
->putback_buf
)
1161 /* already using the put-back buffer. */
1163 /* enlarge putback_buf if necessary. */
1164 if (pt
->read_end
== pt
->read_buf
+ pt
->read_buf_size
1165 && pt
->read_buf
== pt
->read_pos
)
1167 size_t new_size
= pt
->read_buf_size
* 2;
1168 unsigned char *tmp
= (unsigned char *)
1169 scm_gc_realloc (pt
->putback_buf
, pt
->read_buf_size
, new_size
,
1172 pt
->read_pos
= pt
->read_buf
= pt
->putback_buf
= tmp
;
1173 pt
->read_end
= pt
->read_buf
+ pt
->read_buf_size
;
1174 pt
->read_buf_size
= pt
->putback_buf_size
= new_size
;
1177 /* shift any existing bytes to buffer + 1. */
1178 if (pt
->read_pos
== pt
->read_end
)
1179 pt
->read_end
= pt
->read_buf
+ 1;
1180 else if (pt
->read_pos
!= pt
->read_buf
+ 1)
1182 int count
= pt
->read_end
- pt
->read_pos
;
1184 memmove (pt
->read_buf
+ 1, pt
->read_pos
, count
);
1185 pt
->read_end
= pt
->read_buf
+ 1 + count
;
1188 pt
->read_pos
= pt
->read_buf
;
1191 /* switch to the put-back buffer. */
1193 if (pt
->putback_buf
== NULL
)
1196 = (unsigned char *) scm_gc_malloc (SCM_INITIAL_PUTBACK_BUF_SIZE
,
1198 pt
->putback_buf_size
= SCM_INITIAL_PUTBACK_BUF_SIZE
;
1201 pt
->saved_read_buf
= pt
->read_buf
;
1202 pt
->saved_read_pos
= pt
->read_pos
;
1203 pt
->saved_read_end
= pt
->read_end
;
1204 pt
->saved_read_buf_size
= pt
->read_buf_size
;
1206 pt
->read_pos
= pt
->read_buf
= pt
->putback_buf
;
1207 pt
->read_end
= pt
->read_buf
+ 1;
1208 pt
->read_buf_size
= pt
->putback_buf_size
;
1214 pt
->rw_active
= SCM_PORT_READ
;
1218 /* What should col be in this case?
1219 * We'll leave it at -1.
1221 SCM_LINUM (port
) -= 1;
1230 scm_ungets (const char *s
, int n
, SCM port
)
1232 /* This is simple minded and inefficient, but unreading strings is
1233 * probably not a common operation, and remember that line and
1234 * column numbers have to be handled...
1236 * Please feel free to write an optimized version!
1239 scm_ungetc (s
[n
], port
);
1243 SCM_DEFINE (scm_peek_char
, "peek-char", 0, 1, 0,
1245 "Return the next character available from @var{port},\n"
1246 "@emph{without} updating @var{port} to point to the following\n"
1247 "character. If no more characters are available, the\n"
1248 "end-of-file object is returned.\n"
1250 "The value returned by\n"
1251 "a call to @code{peek-char} is the same as the value that would\n"
1252 "have been returned by a call to @code{read-char} on the same\n"
1253 "port. The only difference is that the very next call to\n"
1254 "@code{read-char} or @code{peek-char} on that @var{port} will\n"
1255 "return the value returned by the preceding call to\n"
1256 "@code{peek-char}. In particular, a call to @code{peek-char} on\n"
1257 "an interactive port will hang waiting for input whenever a call\n"
1258 "to @code{read-char} would have hung.")
1259 #define FUNC_NAME s_scm_peek_char
1262 if (SCM_UNBNDP (port
))
1265 SCM_VALIDATE_OPINPORT (1, port
);
1266 column
= SCM_COL(port
);
1267 c
= scm_getc (port
);
1270 scm_ungetc (c
, port
);
1271 SCM_COL(port
) = column
;
1272 return SCM_MAKE_CHAR (c
);
1276 SCM_DEFINE (scm_unread_char
, "unread-char", 1, 1, 0,
1277 (SCM cobj
, SCM port
),
1278 "Place @var{char} in @var{port} so that it will be read by the\n"
1279 "next read operation. If called multiple times, the unread characters\n"
1280 "will be read again in last-in first-out order. If @var{port} is\n"
1281 "not supplied, the current input port is used.")
1282 #define FUNC_NAME s_scm_unread_char
1286 SCM_VALIDATE_CHAR (1, cobj
);
1287 if (SCM_UNBNDP (port
))
1290 SCM_VALIDATE_OPINPORT (2, port
);
1292 c
= SCM_CHAR (cobj
);
1294 scm_ungetc (c
, port
);
1299 SCM_DEFINE (scm_unread_string
, "unread-string", 2, 0, 0,
1300 (SCM str
, SCM port
),
1301 "Place the string @var{str} in @var{port} so that its characters will be\n"
1302 "read in subsequent read operations. If called multiple times, the\n"
1303 "unread characters will be read again in last-in first-out order. If\n"
1304 "@var{port} is not supplied, the current-input-port is used.")
1305 #define FUNC_NAME s_scm_unread_string
1307 SCM_VALIDATE_STRING (1, str
);
1308 if (SCM_UNBNDP (port
))
1311 SCM_VALIDATE_OPINPORT (2, port
);
1313 scm_ungets (SCM_STRING_CHARS (str
), SCM_STRING_LENGTH (str
), port
);
1319 SCM_DEFINE (scm_seek
, "seek", 3, 0, 0,
1320 (SCM fd_port
, SCM offset
, SCM whence
),
1321 "Sets the current position of @var{fd/port} to the integer\n"
1322 "@var{offset}, which is interpreted according to the value of\n"
1325 "One of the following variables should be supplied for\n"
1327 "@defvar SEEK_SET\n"
1328 "Seek from the beginning of the file.\n"
1330 "@defvar SEEK_CUR\n"
1331 "Seek from the current position.\n"
1333 "@defvar SEEK_END\n"
1334 "Seek from the end of the file.\n"
1336 "If @var{fd/port} is a file descriptor, the underlying system\n"
1337 "call is @code{lseek}. @var{port} may be a string port.\n"
1339 "The value returned is the new position in the file. This means\n"
1340 "that the current position of a port can be obtained using:\n"
1342 "(seek port 0 SEEK_CUR)\n"
1344 #define FUNC_NAME s_scm_seek
1350 fd_port
= SCM_COERCE_OUTPORT (fd_port
);
1352 if (sizeof (off_t
) == sizeof (scm_t_intmax
))
1353 off
= scm_to_intmax (offset
);
1355 off
= scm_to_long (offset
);
1356 how
= scm_to_int (whence
);
1358 if (how
!= SEEK_SET
&& how
!= SEEK_CUR
&& how
!= SEEK_END
)
1359 SCM_OUT_OF_RANGE (3, whence
);
1360 if (SCM_OPPORTP (fd_port
))
1362 scm_t_ptob_descriptor
*ptob
= scm_ptobs
+ SCM_PTOBNUM (fd_port
);
1365 SCM_MISC_ERROR ("port is not seekable",
1366 scm_cons (fd_port
, SCM_EOL
));
1368 rv
= ptob
->seek (fd_port
, off
, how
);
1370 else /* file descriptor?. */
1372 rv
= lseek (scm_to_int (fd_port
), off
, how
);
1376 return scm_from_intmax (rv
);
1381 /* Define this function since it is not supported under Windows. */
1382 static int truncate (char *file
, int length
)
1385 if ((fdes
= open (file
, O_BINARY
| O_WRONLY
)) != -1)
1387 ret
= chsize (fdes
, length
);
1392 #endif /* __MINGW32__ */
1394 SCM_DEFINE (scm_truncate_file
, "truncate-file", 1, 1, 0,
1395 (SCM object
, SCM length
),
1396 "Truncates the object referred to by @var{object} to at most\n"
1397 "@var{length} bytes. @var{object} can be a string containing a\n"
1398 "file name or an integer file descriptor or a port.\n"
1399 "@var{length} may be omitted if @var{object} is not a file name,\n"
1400 "in which case the truncation occurs at the current port\n"
1401 "position. The return value is unspecified.")
1402 #define FUNC_NAME s_scm_truncate_file
1407 /* object can be a port, fdes or filename. */
1409 if (SCM_UNBNDP (length
))
1411 /* must supply length if object is a filename. */
1412 if (scm_is_string (object
))
1413 SCM_MISC_ERROR("must supply length if OBJECT is a filename", SCM_EOL
);
1415 length
= scm_seek (object
, SCM_INUM0
, scm_from_int (SEEK_CUR
));
1417 c_length
= scm_to_size_t (length
);
1419 object
= SCM_COERCE_OUTPORT (object
);
1420 if (scm_is_integer (object
))
1422 SCM_SYSCALL (rv
= ftruncate (scm_to_int (object
), c_length
));
1424 else if (SCM_OPOUTPORTP (object
))
1426 scm_t_port
*pt
= SCM_PTAB_ENTRY (object
);
1427 scm_t_ptob_descriptor
*ptob
= scm_ptobs
+ SCM_PTOBNUM (object
);
1429 if (!ptob
->truncate
)
1430 SCM_MISC_ERROR ("port is not truncatable", SCM_EOL
);
1431 if (pt
->rw_active
== SCM_PORT_READ
)
1432 scm_end_input (object
);
1433 else if (pt
->rw_active
== SCM_PORT_WRITE
)
1434 ptob
->flush (object
);
1436 ptob
->truncate (object
, c_length
);
1441 char *str
= scm_to_locale_string (object
);
1443 SCM_SYSCALL (rv
= truncate (str
, c_length
));
1450 return SCM_UNSPECIFIED
;
1454 SCM_DEFINE (scm_port_line
, "port-line", 1, 0, 0,
1456 "Return the current line number for @var{port}.\n"
1458 "The first line of a file is 0. But you might want to add 1\n"
1459 "when printing line numbers, since starting from 1 is\n"
1460 "traditional in error messages, and likely to be more natural to\n"
1462 #define FUNC_NAME s_scm_port_line
1464 port
= SCM_COERCE_OUTPORT (port
);
1465 SCM_VALIDATE_OPENPORT (1, port
);
1466 return scm_from_int (SCM_LINUM (port
));
1470 SCM_DEFINE (scm_set_port_line_x
, "set-port-line!", 2, 0, 0,
1471 (SCM port
, SCM line
),
1472 "Set the current line number for @var{port} to @var{line}. The\n"
1473 "first line of a file is 0.")
1474 #define FUNC_NAME s_scm_set_port_line_x
1476 port
= SCM_COERCE_OUTPORT (port
);
1477 SCM_VALIDATE_OPENPORT (1, port
);
1478 SCM_PTAB_ENTRY (port
)->line_number
= scm_to_int (line
);
1479 return SCM_UNSPECIFIED
;
1483 SCM_DEFINE (scm_port_column
, "port-column", 1, 0, 0,
1485 "Return the current column number of @var{port}.\n"
1486 "If the number is\n"
1487 "unknown, the result is #f. Otherwise, the result is a 0-origin integer\n"
1488 "- i.e. the first character of the first line is line 0, column 0.\n"
1489 "(However, when you display a file position, for example in an error\n"
1490 "message, we recommend you add 1 to get 1-origin integers. This is\n"
1491 "because lines and column numbers traditionally start with 1, and that is\n"
1492 "what non-programmers will find most natural.)")
1493 #define FUNC_NAME s_scm_port_column
1495 port
= SCM_COERCE_OUTPORT (port
);
1496 SCM_VALIDATE_OPENPORT (1, port
);
1497 return scm_from_int (SCM_COL (port
));
1501 SCM_DEFINE (scm_set_port_column_x
, "set-port-column!", 2, 0, 0,
1502 (SCM port
, SCM column
),
1503 "Set the current column of @var{port}. Before reading the first\n"
1504 "character on a line the column should be 0.")
1505 #define FUNC_NAME s_scm_set_port_column_x
1507 port
= SCM_COERCE_OUTPORT (port
);
1508 SCM_VALIDATE_OPENPORT (1, port
);
1509 SCM_PTAB_ENTRY (port
)->column_number
= scm_to_int (column
);
1510 return SCM_UNSPECIFIED
;
1514 SCM_DEFINE (scm_port_filename
, "port-filename", 1, 0, 0,
1516 "Return the filename associated with @var{port}. This function returns\n"
1517 "the strings \"standard input\", \"standard output\" and \"standard error\"\n"
1518 "when called on the current input, output and error ports respectively.")
1519 #define FUNC_NAME s_scm_port_filename
1521 port
= SCM_COERCE_OUTPORT (port
);
1522 SCM_VALIDATE_OPENPORT (1, port
);
1523 return SCM_FILENAME (port
);
1527 SCM_DEFINE (scm_set_port_filename_x
, "set-port-filename!", 2, 0, 0,
1528 (SCM port
, SCM filename
),
1529 "Change the filename associated with @var{port}, using the current input\n"
1530 "port if none is specified. Note that this does not change the port's\n"
1531 "source of data, but only the value that is returned by\n"
1532 "@code{port-filename} and reported in diagnostic output.")
1533 #define FUNC_NAME s_scm_set_port_filename_x
1535 port
= SCM_COERCE_OUTPORT (port
);
1536 SCM_VALIDATE_OPENPORT (1, port
);
1537 /* We allow the user to set the filename to whatever he likes. */
1538 SCM_SET_FILENAME (port
, filename
);
1539 return SCM_UNSPECIFIED
;
1544 extern char * ttyname();
1548 scm_print_port_mode (SCM exp
, SCM port
)
1550 scm_puts (SCM_CLOSEDP (exp
)
1552 : (SCM_RDNG
& SCM_CELL_WORD_0 (exp
)
1553 ? (SCM_WRTNG
& SCM_CELL_WORD_0 (exp
)
1556 : (SCM_WRTNG
& SCM_CELL_WORD_0 (exp
)
1563 scm_port_print (SCM exp
, SCM port
, scm_print_state
*pstate SCM_UNUSED
)
1565 char *type
= SCM_PTOBNAME (SCM_PTOBNUM (exp
));
1568 scm_puts ("#<", port
);
1569 scm_print_port_mode (exp
, port
);
1570 scm_puts (type
, port
);
1571 scm_putc (' ', port
);
1572 scm_intprint (SCM_CELL_WORD_1 (exp
), 16, port
);
1573 scm_putc ('>', port
);
1578 scm_ports_prehistory ()
1581 scm_ptobs
= (scm_t_ptob_descriptor
*) scm_malloc (sizeof (scm_t_ptob_descriptor
));
1588 scm_t_bits scm_tc16_void_port
= 0;
1590 static int fill_input_void_port (SCM port SCM_UNUSED
)
1596 write_void_port (SCM port SCM_UNUSED
,
1597 const void *data SCM_UNUSED
,
1598 size_t size SCM_UNUSED
)
1603 scm_void_port (char *mode_str
)
1605 scm_mutex_lock (&scm_i_port_table_mutex
);
1607 int mode_bits
= scm_mode_bits (mode_str
);
1608 SCM answer
= scm_new_port_table_entry (scm_tc16_void_port
);
1609 scm_t_port
* pt
= SCM_PTAB_ENTRY(answer
);
1611 scm_port_non_buffer (pt
);
1613 SCM_SETSTREAM (answer
, 0);
1614 SCM_SET_CELL_TYPE (answer
, scm_tc16_void_port
| mode_bits
);
1615 scm_mutex_unlock (&scm_i_port_table_mutex
);
1620 SCM_DEFINE (scm_sys_make_void_port
, "%make-void-port", 1, 0, 0,
1622 "Create and return a new void port. A void port acts like\n"
1623 "@file{/dev/null}. The @var{mode} argument\n"
1624 "specifies the input/output modes for this port: see the\n"
1625 "documentation for @code{open-file} in @ref{File Ports}.")
1626 #define FUNC_NAME s_scm_sys_make_void_port
1628 SCM_VALIDATE_STRING (1, mode
);
1629 return scm_void_port (SCM_STRING_CHARS (mode
));
1634 /* Initialization. */
1639 /* lseek() symbols. */
1640 scm_c_define ("SEEK_SET", scm_from_int (SEEK_SET
));
1641 scm_c_define ("SEEK_CUR", scm_from_int (SEEK_CUR
));
1642 scm_c_define ("SEEK_END", scm_from_int (SEEK_END
));
1644 scm_tc16_void_port
= scm_make_port_type ("void", fill_input_void_port
,
1646 #include "libguile/ports.x"