1 /* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2003, 2004, 2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #define _LARGEFILE64_SOURCE /* ask for stat64 etc */
31 #include "libguile/_scm.h"
32 #include "libguile/async.h"
33 #include "libguile/eval.h"
34 #include "libguile/objects.h"
35 #include "libguile/goops.h"
36 #include "libguile/smob.h"
37 #include "libguile/chars.h"
38 #include "libguile/dynwind.h"
40 #include "libguile/keywords.h"
41 #include "libguile/root.h"
42 #include "libguile/strings.h"
43 #include "libguile/mallocs.h"
44 #include "libguile/validate.h"
45 #include "libguile/ports.h"
46 #include "libguile/vectors.h"
47 #include "libguile/fluids.h"
65 #ifdef HAVE_SYS_IOCTL_H
66 #include <sys/ioctl.h>
71 #define ftruncate(fd, size) chsize (fd, size)
75 /* The port kind table --- a dynamically resized array of port types. */
78 /* scm_ptobs scm_numptob
79 * implement a dynamicly resized array of ptob records.
80 * Indexes into this table are used when generating type
81 * tags for smobjects (if you know a tag you can get an index and conversely).
83 scm_t_ptob_descriptor
*scm_ptobs
;
86 /* GC marker for a port with stream of SCM type. */
88 scm_markstream (SCM ptr
)
91 openp
= SCM_CELL_WORD_0 (ptr
) & SCM_OPN
;
93 return SCM_PACK (SCM_STREAM (ptr
));
99 * We choose to use an interface similar to the smob interface with
100 * fill_input and write as standard fields, passed to the port
101 * type constructor, and optional fields set by setters.
105 flush_port_default (SCM port SCM_UNUSED
)
110 end_input_default (SCM port SCM_UNUSED
, int offset SCM_UNUSED
)
115 scm_port_free0 (SCM port
)
121 scm_make_port_type (char *name
,
122 int (*fill_input
) (SCM port
),
123 void (*write
) (SCM port
, const void *data
, size_t size
))
126 if (255 <= scm_numptob
)
128 SCM_CRITICAL_SECTION_START
;
129 SCM_SYSCALL (tmp
= (char *) realloc ((char *) scm_ptobs
,
131 * sizeof (scm_t_ptob_descriptor
)));
134 scm_ptobs
= (scm_t_ptob_descriptor
*) tmp
;
136 scm_ptobs
[scm_numptob
].name
= name
;
137 scm_ptobs
[scm_numptob
].mark
= 0;
138 scm_ptobs
[scm_numptob
].free
= scm_port_free0
;
139 scm_ptobs
[scm_numptob
].print
= scm_port_print
;
140 scm_ptobs
[scm_numptob
].equalp
= 0;
141 scm_ptobs
[scm_numptob
].close
= 0;
143 scm_ptobs
[scm_numptob
].write
= write
;
144 scm_ptobs
[scm_numptob
].flush
= flush_port_default
;
146 scm_ptobs
[scm_numptob
].end_input
= end_input_default
;
147 scm_ptobs
[scm_numptob
].fill_input
= fill_input
;
148 scm_ptobs
[scm_numptob
].input_waiting
= 0;
150 scm_ptobs
[scm_numptob
].seek
= 0;
151 scm_ptobs
[scm_numptob
].truncate
= 0;
155 SCM_CRITICAL_SECTION_END
;
159 scm_memory_error ("scm_make_port_type");
161 /* Make a class object if Goops is present */
163 scm_make_port_classes (scm_numptob
- 1, SCM_PTOBNAME (scm_numptob
- 1));
164 return scm_tc7_port
+ (scm_numptob
- 1) * 256;
168 scm_set_port_mark (long tc
, SCM (*mark
) (SCM
))
170 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].mark
= mark
;
174 scm_set_port_free (long tc
, size_t (*free
) (SCM
))
176 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].free
= free
;
180 scm_set_port_print (long tc
, int (*print
) (SCM exp
, SCM port
,
181 scm_print_state
*pstate
))
183 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].print
= print
;
187 scm_set_port_equalp (long tc
, SCM (*equalp
) (SCM
, SCM
))
189 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].equalp
= equalp
;
193 scm_set_port_flush (long tc
, void (*flush
) (SCM port
))
195 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].flush
= flush
;
199 scm_set_port_end_input (long tc
, void (*end_input
) (SCM port
, int offset
))
201 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].end_input
= end_input
;
205 scm_set_port_close (long tc
, int (*close
) (SCM
))
207 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].close
= close
;
211 scm_set_port_seek (long tc
, off_t (*seek
) (SCM port
,
215 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].seek
= seek
;
219 scm_set_port_truncate (long tc
, void (*truncate
) (SCM port
, off_t length
))
221 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].truncate
= truncate
;
225 scm_set_port_input_waiting (long tc
, int (*input_waiting
) (SCM
))
227 scm_ptobs
[SCM_TC2PTOBNUM (tc
)].input_waiting
= input_waiting
;
232 SCM_DEFINE (scm_char_ready_p
, "char-ready?", 0, 1, 0,
234 "Return @code{#t} if a character is ready on input @var{port}\n"
235 "and return @code{#f} otherwise. If @code{char-ready?} returns\n"
236 "@code{#t} then the next @code{read-char} operation on\n"
237 "@var{port} is guaranteed not to hang. If @var{port} is a file\n"
238 "port at end of file then @code{char-ready?} returns @code{#t}.\n"
240 "@code{char-ready?} exists to make it possible for a\n"
241 "program to accept characters from interactive ports without\n"
242 "getting stuck waiting for input. Any input editors associated\n"
243 "with such ports must make sure that characters whose existence\n"
244 "has been asserted by @code{char-ready?} cannot be rubbed out.\n"
245 "If @code{char-ready?} were to return @code{#f} at end of file,\n"
246 "a port at end of file would be indistinguishable from an\n"
247 "interactive port that has no ready characters.")
248 #define FUNC_NAME s_scm_char_ready_p
252 if (SCM_UNBNDP (port
))
253 port
= scm_current_input_port ();
255 SCM_VALIDATE_OPINPORT (1, port
);
257 pt
= SCM_PTAB_ENTRY (port
);
259 /* if the current read buffer is filled, or the
260 last pushed-back char has been read and the saved buffer is
261 filled, result is true. */
262 if (pt
->read_pos
< pt
->read_end
263 || (pt
->read_buf
== pt
->putback_buf
264 && pt
->saved_read_pos
< pt
->saved_read_end
))
268 scm_t_ptob_descriptor
*ptob
= &scm_ptobs
[SCM_PTOBNUM (port
)];
270 if (ptob
->input_waiting
)
271 return scm_from_bool(ptob
->input_waiting (port
));
278 /* move up to read_len chars from port's putback and/or read buffers
279 into memory starting at dest. returns the number of chars moved. */
280 size_t scm_take_from_input_buffers (SCM port
, char *dest
, size_t read_len
)
282 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
283 size_t chars_read
= 0;
284 size_t from_buf
= min (pt
->read_end
- pt
->read_pos
, read_len
);
288 memcpy (dest
, pt
->read_pos
, from_buf
);
289 pt
->read_pos
+= from_buf
;
290 chars_read
+= from_buf
;
291 read_len
-= from_buf
;
295 /* if putback was active, try the real input buffer too. */
296 if (pt
->read_buf
== pt
->putback_buf
)
298 from_buf
= min (pt
->saved_read_end
- pt
->saved_read_pos
, read_len
);
301 memcpy (dest
, pt
->saved_read_pos
, from_buf
);
302 pt
->saved_read_pos
+= from_buf
;
303 chars_read
+= from_buf
;
309 /* Clear a port's read buffers, returning the contents. */
310 SCM_DEFINE (scm_drain_input
, "drain-input", 1, 0, 0,
312 "This procedure clears a port's input buffers, similar\n"
313 "to the way that force-output clears the output buffer. The\n"
314 "contents of the buffers are returned as a single string, e.g.,\n"
317 "(define p (open-input-file ...))\n"
318 "(drain-input p) => empty string, nothing buffered yet.\n"
319 "(unread-char (read-char p) p)\n"
320 "(drain-input p) => initial chars from p, up to the buffer size.\n"
322 "Draining the buffers may be useful for cleanly finishing\n"
323 "buffered I/O so that the file descriptor can be used directly\n"
324 "for further input.")
325 #define FUNC_NAME s_scm_drain_input
332 SCM_VALIDATE_OPINPORT (1, port
);
333 pt
= SCM_PTAB_ENTRY (port
);
335 count
= pt
->read_end
- pt
->read_pos
;
336 if (pt
->read_buf
== pt
->putback_buf
)
337 count
+= pt
->saved_read_end
- pt
->saved_read_pos
;
339 result
= scm_i_make_string (count
, &data
);
340 scm_take_from_input_buffers (port
, data
, count
);
346 /* Standard ports --- current input, output, error, and more(!). */
348 static SCM cur_inport_fluid
;
349 static SCM cur_outport_fluid
;
350 static SCM cur_errport_fluid
;
351 static SCM cur_loadport_fluid
;
353 SCM_DEFINE (scm_current_input_port
, "current-input-port", 0, 0, 0,
355 "Return the current input port. This is the default port used\n"
356 "by many input procedures. Initially, @code{current-input-port}\n"
357 "returns the @dfn{standard input} in Unix and C terminology.")
358 #define FUNC_NAME s_scm_current_input_port
360 return scm_fluid_ref (cur_inport_fluid
);
364 SCM_DEFINE (scm_current_output_port
, "current-output-port", 0, 0, 0,
366 "Return the current output port. This is the default port used\n"
367 "by many output procedures. Initially,\n"
368 "@code{current-output-port} returns the @dfn{standard output} in\n"
369 "Unix and C terminology.")
370 #define FUNC_NAME s_scm_current_output_port
372 return scm_fluid_ref (cur_outport_fluid
);
376 SCM_DEFINE (scm_current_error_port
, "current-error-port", 0, 0, 0,
378 "Return the port to which errors and warnings should be sent (the\n"
379 "@dfn{standard error} in Unix and C terminology).")
380 #define FUNC_NAME s_scm_current_error_port
382 return scm_fluid_ref (cur_errport_fluid
);
386 SCM_DEFINE (scm_current_load_port
, "current-load-port", 0, 0, 0,
388 "Return the current-load-port.\n"
389 "The load port is used internally by @code{primitive-load}.")
390 #define FUNC_NAME s_scm_current_load_port
392 return scm_fluid_ref (cur_loadport_fluid
);
396 SCM_DEFINE (scm_set_current_input_port
, "set-current-input-port", 1, 0, 0,
398 "@deffnx {Scheme Procedure} set-current-output-port port\n"
399 "@deffnx {Scheme Procedure} set-current-error-port port\n"
400 "Change the ports returned by @code{current-input-port},\n"
401 "@code{current-output-port} and @code{current-error-port}, respectively,\n"
402 "so that they use the supplied @var{port} for input or output.")
403 #define FUNC_NAME s_scm_set_current_input_port
405 SCM oinp
= scm_fluid_ref (cur_inport_fluid
);
406 SCM_VALIDATE_OPINPORT (1, port
);
407 scm_fluid_set_x (cur_inport_fluid
, port
);
413 SCM_DEFINE (scm_set_current_output_port
, "set-current-output-port", 1, 0, 0,
415 "Set the current default output port to @var{port}.")
416 #define FUNC_NAME s_scm_set_current_output_port
418 SCM ooutp
= scm_fluid_ref (cur_outport_fluid
);
419 port
= SCM_COERCE_OUTPORT (port
);
420 SCM_VALIDATE_OPOUTPORT (1, port
);
421 scm_fluid_set_x (cur_outport_fluid
, port
);
427 SCM_DEFINE (scm_set_current_error_port
, "set-current-error-port", 1, 0, 0,
429 "Set the current default error port to @var{port}.")
430 #define FUNC_NAME s_scm_set_current_error_port
432 SCM oerrp
= scm_fluid_ref (cur_errport_fluid
);
433 port
= SCM_COERCE_OUTPORT (port
);
434 SCM_VALIDATE_OPOUTPORT (1, port
);
435 scm_fluid_set_x (cur_errport_fluid
, port
);
441 scm_dynwind_current_input_port (SCM port
)
442 #define FUNC_NAME NULL
444 SCM_VALIDATE_OPINPORT (1, port
);
445 scm_dynwind_fluid (cur_inport_fluid
, port
);
450 scm_dynwind_current_output_port (SCM port
)
451 #define FUNC_NAME NULL
453 port
= SCM_COERCE_OUTPORT (port
);
454 SCM_VALIDATE_OPOUTPORT (1, port
);
455 scm_dynwind_fluid (cur_outport_fluid
, port
);
460 scm_dynwind_current_error_port (SCM port
)
461 #define FUNC_NAME NULL
463 port
= SCM_COERCE_OUTPORT (port
);
464 SCM_VALIDATE_OPOUTPORT (1, port
);
465 scm_dynwind_fluid (cur_errport_fluid
, port
);
470 scm_i_dynwind_current_load_port (SCM port
)
472 scm_dynwind_fluid (cur_loadport_fluid
, port
);
476 /* The port table --- an array of pointers to ports. */
478 scm_t_port
**scm_i_port_table
;
480 long scm_i_port_table_size
= 0; /* Number of ports in scm_i_port_table. */
481 long scm_i_port_table_room
= 20; /* Size of the array. */
483 scm_i_pthread_mutex_t scm_i_port_table_mutex
= SCM_I_PTHREAD_MUTEX_INITIALIZER
;
485 /* This function is not and should not be thread safe. */
488 scm_new_port_table_entry (scm_t_bits tag
)
489 #define FUNC_NAME "scm_new_port_table_entry"
492 We initialize the cell to empty, this is in case scm_gc_calloc
493 triggers GC ; we don't want the GC to scan a half-finished Z.
496 SCM z
= scm_cons (SCM_EOL
, SCM_EOL
);
497 scm_t_port
*entry
= (scm_t_port
*) scm_gc_calloc (sizeof (scm_t_port
), "port");
498 if (scm_i_port_table_size
== scm_i_port_table_room
)
500 /* initial malloc is in gc.c. this doesn't use scm_gc_malloc etc.,
501 since it can never be freed during gc. */
502 void *newt
= scm_realloc ((char *) scm_i_port_table
,
503 (size_t) (sizeof (scm_t_port
*)
504 * scm_i_port_table_room
* 2));
505 scm_i_port_table
= (scm_t_port
**) newt
;
506 scm_i_port_table_room
*= 2;
509 entry
->entry
= scm_i_port_table_size
;
511 entry
->file_name
= SCM_BOOL_F
;
512 entry
->rw_active
= SCM_PORT_NEITHER
;
514 scm_i_port_table
[scm_i_port_table_size
] = entry
;
515 scm_i_port_table_size
++;
518 SCM_SET_CELL_TYPE(z
, tag
);
519 SCM_SETPTAB_ENTRY(z
, entry
);
525 #if SCM_ENABLE_DEPRECATED==1
527 scm_add_to_port_table (SCM port
)
529 SCM z
= scm_new_port_table_entry (scm_tc7_port
);
530 scm_t_port
* pt
= SCM_PTAB_ENTRY(z
);
533 SCM_SETCAR(z
, SCM_EOL
);
534 SCM_SETCDR(z
, SCM_EOL
);
535 SCM_SETPTAB_ENTRY (port
, pt
);
541 /* Remove a port from the table and destroy it. */
543 /* This function is not and should not be thread safe. */
546 scm_remove_from_port_table (SCM port
)
547 #define FUNC_NAME "scm_remove_from_port_table"
549 scm_t_port
*p
= SCM_PTAB_ENTRY (port
);
552 if (i
>= scm_i_port_table_size
)
553 SCM_MISC_ERROR ("Port not in table: ~S", scm_list_1 (port
));
555 scm_gc_free (p
->putback_buf
, p
->putback_buf_size
, "putback buffer");
556 scm_gc_free (p
, sizeof (scm_t_port
), "port");
557 /* Since we have just freed slot i we can shrink the table by moving
558 the last entry to that slot... */
559 if (i
< scm_i_port_table_size
- 1)
561 scm_i_port_table
[i
] = scm_i_port_table
[scm_i_port_table_size
- 1];
562 scm_i_port_table
[i
]->entry
= i
;
564 SCM_SETPTAB_ENTRY (port
, 0);
565 scm_i_port_table_size
--;
571 /* Functions for debugging. */
573 SCM_DEFINE (scm_pt_size
, "pt-size", 0, 0, 0,
575 "Return the number of ports in the port table. @code{pt-size}\n"
576 "is only included in @code{--enable-guile-debug} builds.")
577 #define FUNC_NAME s_scm_pt_size
579 return scm_from_int (scm_i_port_table_size
);
583 SCM_DEFINE (scm_pt_member
, "pt-member", 1, 0, 0,
585 "Return the port at @var{index} in the port table.\n"
586 "@code{pt-member} is only included in\n"
587 "@code{--enable-guile-debug} builds.")
588 #define FUNC_NAME s_scm_pt_member
590 size_t i
= scm_to_size_t (index
);
591 if (i
>= scm_i_port_table_size
)
594 return scm_i_port_table
[i
]->port
;
600 scm_port_non_buffer (scm_t_port
*pt
)
602 pt
->read_pos
= pt
->read_buf
= pt
->read_end
= &pt
->shortbuf
;
603 pt
->write_buf
= pt
->write_pos
= &pt
->shortbuf
;
604 pt
->read_buf_size
= pt
->write_buf_size
= 1;
605 pt
->write_end
= pt
->write_buf
+ pt
->write_buf_size
;
609 /* Revealed counts --- an oddity inherited from SCSH. */
611 /* Find a port in the table and return its revealed count.
612 Also used by the garbage collector.
616 scm_revealed_count (SCM port
)
618 return SCM_REVEALED(port
);
623 /* Return the revealed count for a port. */
625 SCM_DEFINE (scm_port_revealed
, "port-revealed", 1, 0, 0,
627 "Return the revealed count for @var{port}.")
628 #define FUNC_NAME s_scm_port_revealed
630 port
= SCM_COERCE_OUTPORT (port
);
631 SCM_VALIDATE_OPENPORT (1, port
);
632 return scm_from_int (scm_revealed_count (port
));
636 /* Set the revealed count for a port. */
637 SCM_DEFINE (scm_set_port_revealed_x
, "set-port-revealed!", 2, 0, 0,
638 (SCM port
, SCM rcount
),
639 "Sets the revealed count for a port to a given value.\n"
640 "The return value is unspecified.")
641 #define FUNC_NAME s_scm_set_port_revealed_x
643 port
= SCM_COERCE_OUTPORT (port
);
644 SCM_VALIDATE_OPENPORT (1, port
);
645 SCM_REVEALED (port
) = scm_to_int (rcount
);
646 return SCM_UNSPECIFIED
;
652 /* Retrieving a port's mode. */
654 /* Return the flags that characterize a port based on the mode
655 * string used to open a file for that port.
657 * See PORT FLAGS in scm.h
661 scm_i_mode_bits_n (const char *modes
, size_t n
)
664 | (memchr (modes
, 'r', n
) || memchr (modes
, '+', n
) ? SCM_RDNG
: 0)
665 | ( memchr (modes
, 'w', n
)
666 || memchr (modes
, 'a', n
)
667 || memchr (modes
, '+', n
) ? SCM_WRTNG
: 0)
668 | (memchr (modes
, '0', n
) ? SCM_BUF0
: 0)
669 | (memchr (modes
, 'l', n
) ? SCM_BUFLINE
: 0));
673 scm_mode_bits (char *modes
)
675 return scm_i_mode_bits_n (modes
, strlen (modes
));
679 scm_i_mode_bits (SCM modes
)
683 if (!scm_is_string (modes
))
684 scm_wrong_type_arg_msg (NULL
, 0, modes
, "string");
686 bits
= scm_i_mode_bits_n (scm_i_string_chars (modes
),
687 scm_i_string_length (modes
));
688 scm_remember_upto_here_1 (modes
);
692 /* Return the mode flags from an open port.
693 * Some modes such as "append" are only used when opening
694 * a file and are not returned here. */
696 SCM_DEFINE (scm_port_mode
, "port-mode", 1, 0, 0,
698 "Return the port modes associated with the open port @var{port}.\n"
699 "These will not necessarily be identical to the modes used when\n"
700 "the port was opened, since modes such as \"append\" which are\n"
701 "used only during port creation are not retained.")
702 #define FUNC_NAME s_scm_port_mode
707 port
= SCM_COERCE_OUTPORT (port
);
708 SCM_VALIDATE_OPPORT (1, port
);
709 if (SCM_CELL_WORD_0 (port
) & SCM_RDNG
) {
710 if (SCM_CELL_WORD_0 (port
) & SCM_WRTNG
)
711 strcpy (modes
, "r+");
715 else if (SCM_CELL_WORD_0 (port
) & SCM_WRTNG
)
717 if (SCM_CELL_WORD_0 (port
) & SCM_BUF0
)
719 return scm_from_locale_string (modes
);
728 * Call the close operation on a port object.
729 * see also scm_close.
731 SCM_DEFINE (scm_close_port
, "close-port", 1, 0, 0,
733 "Close the specified port object. Return @code{#t} if it\n"
734 "successfully closes a port or @code{#f} if it was already\n"
735 "closed. An exception may be raised if an error occurs, for\n"
736 "example when flushing buffered output. See also @ref{Ports and\n"
737 "File Descriptors, close}, for a procedure which can close file\n"
739 #define FUNC_NAME s_scm_close_port
744 port
= SCM_COERCE_OUTPORT (port
);
746 SCM_VALIDATE_PORT (1, port
);
747 if (SCM_CLOSEDP (port
))
749 i
= SCM_PTOBNUM (port
);
750 if (scm_ptobs
[i
].close
)
751 rv
= (scm_ptobs
[i
].close
) (port
);
754 scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex
);
755 scm_remove_from_port_table (port
);
756 scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex
);
757 SCM_CLR_PORT_OPEN_FLAG (port
);
758 return scm_from_bool (rv
>= 0);
762 SCM_DEFINE (scm_close_input_port
, "close-input-port", 1, 0, 0,
764 "Close the specified input port object. The routine has no effect if\n"
765 "the file has already been closed. An exception may be raised if an\n"
766 "error occurs. The value returned is unspecified.\n\n"
767 "See also @ref{Ports and File Descriptors, close}, for a procedure\n"
768 "which can close file descriptors.")
769 #define FUNC_NAME s_scm_close_input_port
771 SCM_VALIDATE_INPUT_PORT (1, port
);
772 scm_close_port (port
);
773 return SCM_UNSPECIFIED
;
777 SCM_DEFINE (scm_close_output_port
, "close-output-port", 1, 0, 0,
779 "Close the specified output port object. The routine has no effect if\n"
780 "the file has already been closed. An exception may be raised if an\n"
781 "error occurs. The value returned is unspecified.\n\n"
782 "See also @ref{Ports and File Descriptors, close}, for a procedure\n"
783 "which can close file descriptors.")
784 #define FUNC_NAME s_scm_close_output_port
786 port
= SCM_COERCE_OUTPORT (port
);
787 SCM_VALIDATE_OUTPUT_PORT (1, port
);
788 scm_close_port (port
);
789 return SCM_UNSPECIFIED
;
794 scm_c_port_for_each (void (*proc
)(void *data
, SCM p
), void *data
)
800 /* Even without pre-emptive multithreading, running arbitrary code
801 while scanning the port table is unsafe because the port table
802 can change arbitrarily (from a GC, for example). So we first
803 collect the ports into a vector. -mvo */
805 scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex
);
806 n
= scm_i_port_table_size
;
807 scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex
);
809 ports
= scm_c_make_vector (n
, SCM_BOOL_F
);
811 scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex
);
812 if (n
> scm_i_port_table_size
)
813 n
= scm_i_port_table_size
;
814 for (i
= 0; i
< n
; i
++)
815 SCM_SIMPLE_VECTOR_SET (ports
, i
, scm_i_port_table
[i
]->port
);
816 scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex
);
818 for (i
= 0; i
< n
; i
++)
819 proc (data
, SCM_SIMPLE_VECTOR_REF (ports
, i
));
822 SCM_DEFINE (scm_port_for_each
, "port-for-each", 1, 0, 0,
824 "Apply @var{proc} to each port in the Guile port table\n"
825 "in turn. The return value is unspecified. More specifically,\n"
826 "@var{proc} is applied exactly once to every port that exists\n"
827 "in the system at the time @var{port-for-each} is invoked.\n"
828 "Changes to the port table while @var{port-for-each} is running\n"
829 "have no effect as far as @var{port-for-each} is concerned.")
830 #define FUNC_NAME s_scm_port_for_each
832 SCM_VALIDATE_PROC (1, proc
);
834 scm_c_port_for_each ((void (*)(void*,SCM
))scm_call_1
, proc
);
835 return SCM_UNSPECIFIED
;
841 /* Utter miscellany. Gosh, we should clean this up some time. */
843 SCM_DEFINE (scm_input_port_p
, "input-port?", 1, 0, 0,
845 "Return @code{#t} if @var{x} is an input port, otherwise return\n"
846 "@code{#f}. Any object satisfying this predicate also satisfies\n"
848 #define FUNC_NAME s_scm_input_port_p
850 return scm_from_bool (SCM_INPUT_PORT_P (x
));
854 SCM_DEFINE (scm_output_port_p
, "output-port?", 1, 0, 0,
856 "Return @code{#t} if @var{x} is an output port, otherwise return\n"
857 "@code{#f}. Any object satisfying this predicate also satisfies\n"
859 #define FUNC_NAME s_scm_output_port_p
861 x
= SCM_COERCE_OUTPORT (x
);
862 return scm_from_bool (SCM_OUTPUT_PORT_P (x
));
866 SCM_DEFINE (scm_port_p
, "port?", 1, 0, 0,
868 "Return a boolean indicating whether @var{x} is a port.\n"
869 "Equivalent to @code{(or (input-port? @var{x}) (output-port?\n"
871 #define FUNC_NAME s_scm_port_p
873 return scm_from_bool (SCM_PORTP (x
));
877 SCM_DEFINE (scm_port_closed_p
, "port-closed?", 1, 0, 0,
879 "Return @code{#t} if @var{port} is closed or @code{#f} if it is\n"
881 #define FUNC_NAME s_scm_port_closed_p
883 SCM_VALIDATE_PORT (1, port
);
884 return scm_from_bool (!SCM_OPPORTP (port
));
888 SCM_DEFINE (scm_eof_object_p
, "eof-object?", 1, 0, 0,
890 "Return @code{#t} if @var{x} is an end-of-file object; otherwise\n"
892 #define FUNC_NAME s_scm_eof_object_p
894 return scm_from_bool(SCM_EOF_OBJECT_P (x
));
898 SCM_DEFINE (scm_force_output
, "force-output", 0, 1, 0,
900 "Flush the specified output port, or the current output port if @var{port}\n"
901 "is omitted. The current output buffer contents are passed to the\n"
902 "underlying port implementation (e.g., in the case of fports, the\n"
903 "data will be written to the file and the output buffer will be cleared.)\n"
904 "It has no effect on an unbuffered port.\n\n"
905 "The return value is unspecified.")
906 #define FUNC_NAME s_scm_force_output
908 if (SCM_UNBNDP (port
))
909 port
= scm_current_output_port ();
912 port
= SCM_COERCE_OUTPORT (port
);
913 SCM_VALIDATE_OPOUTPORT (1, port
);
916 return SCM_UNSPECIFIED
;
920 SCM_DEFINE (scm_flush_all_ports
, "flush-all-ports", 0, 0, 0,
922 "Equivalent to calling @code{force-output} on\n"
923 "all open output ports. The return value is unspecified.")
924 #define FUNC_NAME s_scm_flush_all_ports
928 scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex
);
929 for (i
= 0; i
< scm_i_port_table_size
; i
++)
931 if (SCM_OPOUTPORTP (scm_i_port_table
[i
]->port
))
932 scm_flush (scm_i_port_table
[i
]->port
);
934 scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex
);
935 return SCM_UNSPECIFIED
;
939 SCM_DEFINE (scm_read_char
, "read-char", 0, 1, 0,
941 "Return the next character available from @var{port}, updating\n"
942 "@var{port} to point to the following character. If no more\n"
943 "characters are available, the end-of-file object is returned.")
944 #define FUNC_NAME s_scm_read_char
947 if (SCM_UNBNDP (port
))
948 port
= scm_current_input_port ();
949 SCM_VALIDATE_OPINPORT (1, port
);
953 return SCM_MAKE_CHAR (c
);
957 /* this should only be called when the read buffer is empty. it
958 tries to refill the read buffer. it returns the first char from
959 the port, which is either EOF or *(pt->read_pos). */
961 scm_fill_input (SCM port
)
963 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
965 if (pt
->read_buf
== pt
->putback_buf
)
967 /* finished reading put-back chars. */
968 pt
->read_buf
= pt
->saved_read_buf
;
969 pt
->read_pos
= pt
->saved_read_pos
;
970 pt
->read_end
= pt
->saved_read_end
;
971 pt
->read_buf_size
= pt
->saved_read_buf_size
;
972 if (pt
->read_pos
< pt
->read_end
)
973 return *(pt
->read_pos
);
975 return scm_ptobs
[SCM_PTOBNUM (port
)].fill_input (port
);
982 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
984 if (pt
->rw_active
== SCM_PORT_WRITE
)
985 /* may be marginally faster than calling scm_flush. */
986 scm_ptobs
[SCM_PTOBNUM (port
)].flush (port
);
989 pt
->rw_active
= SCM_PORT_READ
;
991 if (pt
->read_pos
>= pt
->read_end
)
993 if (scm_fill_input (port
) == EOF
)
997 c
= *(pt
->read_pos
++);
1024 scm_putc (char c
, SCM port
)
1026 SCM_ASSERT_TYPE (SCM_OPOUTPORTP (port
), port
, 0, NULL
, "output port");
1027 scm_lfwrite (&c
, 1, port
);
1031 scm_puts (const char *s
, SCM port
)
1033 SCM_ASSERT_TYPE (SCM_OPOUTPORTP (port
), port
, 0, NULL
, "output port");
1034 scm_lfwrite (s
, strlen (s
), port
);
1039 * This function differs from scm_c_write; it updates port line and
1043 scm_lfwrite (const char *ptr
, size_t size
, SCM port
)
1045 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
1046 scm_t_ptob_descriptor
*ptob
= &scm_ptobs
[SCM_PTOBNUM (port
)];
1048 if (pt
->rw_active
== SCM_PORT_READ
)
1049 scm_end_input (port
);
1051 ptob
->write (port
, ptr
, size
);
1053 for (; size
; ptr
++, size
--) {
1056 else if (*ptr
== '\b') {
1059 else if (*ptr
== '\n') {
1062 else if (*ptr
== '\r') {
1065 else if (*ptr
== '\t') {
1074 pt
->rw_active
= SCM_PORT_WRITE
;
1079 * Used by an application to read arbitrary number of bytes from an
1080 * SCM port. Same semantics as libc read, except that scm_c_read only
1081 * returns less than SIZE bytes if at end-of-file.
1083 * Warning: Doesn't update port line and column counts! */
1086 scm_c_read (SCM port
, void *buffer
, size_t size
)
1088 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
1089 size_t n_read
= 0, n_available
;
1091 if (pt
->rw_active
== SCM_PORT_WRITE
)
1092 scm_ptobs
[SCM_PTOBNUM (port
)].flush (port
);
1095 pt
->rw_active
= SCM_PORT_READ
;
1097 if (SCM_READ_BUFFER_EMPTY_P (pt
))
1099 if (scm_fill_input (port
) == EOF
)
1103 n_available
= pt
->read_end
- pt
->read_pos
;
1105 while (n_available
< size
)
1107 memcpy (buffer
, pt
->read_pos
, n_available
);
1108 buffer
= (char *) buffer
+ n_available
;
1109 pt
->read_pos
+= n_available
;
1110 n_read
+= n_available
;
1112 if (SCM_READ_BUFFER_EMPTY_P (pt
))
1114 if (scm_fill_input (port
) == EOF
)
1118 size
-= n_available
;
1119 n_available
= pt
->read_end
- pt
->read_pos
;
1122 memcpy (buffer
, pt
->read_pos
, size
);
1123 pt
->read_pos
+= size
;
1125 return n_read
+ size
;
1130 * Used by an application to write arbitrary number of bytes to an SCM
1131 * port. Similar semantics as libc write. However, unlike libc
1132 * write, scm_c_write writes the requested number of bytes and has no
1135 * Warning: Doesn't update port line and column counts!
1139 scm_c_write (SCM port
, const void *ptr
, size_t size
)
1141 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
1142 scm_t_ptob_descriptor
*ptob
= &scm_ptobs
[SCM_PTOBNUM (port
)];
1144 if (pt
->rw_active
== SCM_PORT_READ
)
1145 scm_end_input (port
);
1147 ptob
->write (port
, ptr
, size
);
1150 pt
->rw_active
= SCM_PORT_WRITE
;
1154 scm_flush (SCM port
)
1156 long i
= SCM_PTOBNUM (port
);
1157 (scm_ptobs
[i
].flush
) (port
);
1161 scm_end_input (SCM port
)
1164 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
1166 if (pt
->read_buf
== pt
->putback_buf
)
1168 offset
= pt
->read_end
- pt
->read_pos
;
1169 pt
->read_buf
= pt
->saved_read_buf
;
1170 pt
->read_pos
= pt
->saved_read_pos
;
1171 pt
->read_end
= pt
->saved_read_end
;
1172 pt
->read_buf_size
= pt
->saved_read_buf_size
;
1177 scm_ptobs
[SCM_PTOBNUM (port
)].end_input (port
, offset
);
1184 scm_ungetc (int c
, SCM port
)
1185 #define FUNC_NAME "scm_ungetc"
1187 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
1189 if (pt
->read_buf
== pt
->putback_buf
)
1190 /* already using the put-back buffer. */
1192 /* enlarge putback_buf if necessary. */
1193 if (pt
->read_end
== pt
->read_buf
+ pt
->read_buf_size
1194 && pt
->read_buf
== pt
->read_pos
)
1196 size_t new_size
= pt
->read_buf_size
* 2;
1197 unsigned char *tmp
= (unsigned char *)
1198 scm_gc_realloc (pt
->putback_buf
, pt
->read_buf_size
, new_size
,
1201 pt
->read_pos
= pt
->read_buf
= pt
->putback_buf
= tmp
;
1202 pt
->read_end
= pt
->read_buf
+ pt
->read_buf_size
;
1203 pt
->read_buf_size
= pt
->putback_buf_size
= new_size
;
1206 /* shift any existing bytes to buffer + 1. */
1207 if (pt
->read_pos
== pt
->read_end
)
1208 pt
->read_end
= pt
->read_buf
+ 1;
1209 else if (pt
->read_pos
!= pt
->read_buf
+ 1)
1211 int count
= pt
->read_end
- pt
->read_pos
;
1213 memmove (pt
->read_buf
+ 1, pt
->read_pos
, count
);
1214 pt
->read_end
= pt
->read_buf
+ 1 + count
;
1217 pt
->read_pos
= pt
->read_buf
;
1220 /* switch to the put-back buffer. */
1222 if (pt
->putback_buf
== NULL
)
1225 = (unsigned char *) scm_gc_malloc (SCM_INITIAL_PUTBACK_BUF_SIZE
,
1227 pt
->putback_buf_size
= SCM_INITIAL_PUTBACK_BUF_SIZE
;
1230 pt
->saved_read_buf
= pt
->read_buf
;
1231 pt
->saved_read_pos
= pt
->read_pos
;
1232 pt
->saved_read_end
= pt
->read_end
;
1233 pt
->saved_read_buf_size
= pt
->read_buf_size
;
1235 pt
->read_pos
= pt
->read_buf
= pt
->putback_buf
;
1236 pt
->read_end
= pt
->read_buf
+ 1;
1237 pt
->read_buf_size
= pt
->putback_buf_size
;
1243 pt
->rw_active
= SCM_PORT_READ
;
1247 /* What should col be in this case?
1248 * We'll leave it at -1.
1250 SCM_LINUM (port
) -= 1;
1259 scm_ungets (const char *s
, int n
, SCM port
)
1261 /* This is simple minded and inefficient, but unreading strings is
1262 * probably not a common operation, and remember that line and
1263 * column numbers have to be handled...
1265 * Please feel free to write an optimized version!
1268 scm_ungetc (s
[n
], port
);
1272 SCM_DEFINE (scm_peek_char
, "peek-char", 0, 1, 0,
1274 "Return the next character available from @var{port},\n"
1275 "@emph{without} updating @var{port} to point to the following\n"
1276 "character. If no more characters are available, the\n"
1277 "end-of-file object is returned.\n"
1279 "The value returned by\n"
1280 "a call to @code{peek-char} is the same as the value that would\n"
1281 "have been returned by a call to @code{read-char} on the same\n"
1282 "port. The only difference is that the very next call to\n"
1283 "@code{read-char} or @code{peek-char} on that @var{port} will\n"
1284 "return the value returned by the preceding call to\n"
1285 "@code{peek-char}. In particular, a call to @code{peek-char} on\n"
1286 "an interactive port will hang waiting for input whenever a call\n"
1287 "to @code{read-char} would have hung.")
1288 #define FUNC_NAME s_scm_peek_char
1291 if (SCM_UNBNDP (port
))
1292 port
= scm_current_input_port ();
1294 SCM_VALIDATE_OPINPORT (1, port
);
1295 column
= SCM_COL(port
);
1296 c
= scm_getc (port
);
1299 scm_ungetc (c
, port
);
1300 SCM_COL(port
) = column
;
1301 return SCM_MAKE_CHAR (c
);
1305 SCM_DEFINE (scm_unread_char
, "unread-char", 1, 1, 0,
1306 (SCM cobj
, SCM port
),
1307 "Place @var{char} in @var{port} so that it will be read by the\n"
1308 "next read operation. If called multiple times, the unread characters\n"
1309 "will be read again in last-in first-out order. If @var{port} is\n"
1310 "not supplied, the current input port is used.")
1311 #define FUNC_NAME s_scm_unread_char
1315 SCM_VALIDATE_CHAR (1, cobj
);
1316 if (SCM_UNBNDP (port
))
1317 port
= scm_current_input_port ();
1319 SCM_VALIDATE_OPINPORT (2, port
);
1321 c
= SCM_CHAR (cobj
);
1323 scm_ungetc (c
, port
);
1328 SCM_DEFINE (scm_unread_string
, "unread-string", 2, 0, 0,
1329 (SCM str
, SCM port
),
1330 "Place the string @var{str} in @var{port} so that its characters will be\n"
1331 "read in subsequent read operations. If called multiple times, the\n"
1332 "unread characters will be read again in last-in first-out order. If\n"
1333 "@var{port} is not supplied, the current-input-port is used.")
1334 #define FUNC_NAME s_scm_unread_string
1336 SCM_VALIDATE_STRING (1, str
);
1337 if (SCM_UNBNDP (port
))
1338 port
= scm_current_input_port ();
1340 SCM_VALIDATE_OPINPORT (2, port
);
1342 scm_ungets (scm_i_string_chars (str
), scm_i_string_length (str
), port
);
1348 SCM_DEFINE (scm_seek
, "seek", 3, 0, 0,
1349 (SCM fd_port
, SCM offset
, SCM whence
),
1350 "Sets the current position of @var{fd/port} to the integer\n"
1351 "@var{offset}, which is interpreted according to the value of\n"
1354 "One of the following variables should be supplied for\n"
1356 "@defvar SEEK_SET\n"
1357 "Seek from the beginning of the file.\n"
1359 "@defvar SEEK_CUR\n"
1360 "Seek from the current position.\n"
1362 "@defvar SEEK_END\n"
1363 "Seek from the end of the file.\n"
1365 "If @var{fd/port} is a file descriptor, the underlying system\n"
1366 "call is @code{lseek}. @var{port} may be a string port.\n"
1368 "The value returned is the new position in the file. This means\n"
1369 "that the current position of a port can be obtained using:\n"
1371 "(seek port 0 SEEK_CUR)\n"
1373 #define FUNC_NAME s_scm_seek
1379 fd_port
= SCM_COERCE_OUTPORT (fd_port
);
1381 if (sizeof (off_t
) == sizeof (scm_t_intmax
))
1382 off
= scm_to_intmax (offset
);
1384 off
= scm_to_long (offset
);
1385 how
= scm_to_int (whence
);
1387 if (how
!= SEEK_SET
&& how
!= SEEK_CUR
&& how
!= SEEK_END
)
1388 SCM_OUT_OF_RANGE (3, whence
);
1389 if (SCM_OPPORTP (fd_port
))
1391 scm_t_ptob_descriptor
*ptob
= scm_ptobs
+ SCM_PTOBNUM (fd_port
);
1394 SCM_MISC_ERROR ("port is not seekable",
1395 scm_cons (fd_port
, SCM_EOL
));
1397 rv
= ptob
->seek (fd_port
, off
, how
);
1399 else /* file descriptor?. */
1401 rv
= lseek (scm_to_int (fd_port
), off
, how
);
1405 return scm_from_intmax (rv
);
1410 /* Define this function since it is not supported under Windows. */
1411 static int truncate (char *file
, int length
)
1414 if ((fdes
= open (file
, O_BINARY
| O_WRONLY
)) != -1)
1416 ret
= chsize (fdes
, length
);
1421 #endif /* __MINGW32__ */
1423 SCM_DEFINE (scm_truncate_file
, "truncate-file", 1, 1, 0,
1424 (SCM object
, SCM length
),
1425 "Truncates the object referred to by @var{object} to at most\n"
1426 "@var{length} bytes. @var{object} can be a string containing a\n"
1427 "file name or an integer file descriptor or a port.\n"
1428 "@var{length} may be omitted if @var{object} is not a file name,\n"
1429 "in which case the truncation occurs at the current port\n"
1430 "position. The return value is unspecified.")
1431 #define FUNC_NAME s_scm_truncate_file
1435 /* "object" can be a port, fdes or filename.
1437 Negative "length" makes no sense, but it's left to truncate() or
1438 ftruncate() to give back an error for that (normally EINVAL).
1441 if (SCM_UNBNDP (length
))
1443 /* must supply length if object is a filename. */
1444 if (scm_is_string (object
))
1445 SCM_MISC_ERROR("must supply length if OBJECT is a filename", SCM_EOL
);
1447 length
= scm_seek (object
, SCM_INUM0
, scm_from_int (SEEK_CUR
));
1450 object
= SCM_COERCE_OUTPORT (object
);
1451 if (scm_is_integer (object
))
1453 off_t c_length
= scm_to_off_t (length
);
1454 SCM_SYSCALL (rv
= ftruncate (scm_to_int (object
), c_length
));
1456 else if (SCM_OPOUTPORTP (object
))
1458 off_t c_length
= scm_to_off_t (length
);
1459 scm_t_port
*pt
= SCM_PTAB_ENTRY (object
);
1460 scm_t_ptob_descriptor
*ptob
= scm_ptobs
+ SCM_PTOBNUM (object
);
1462 if (!ptob
->truncate
)
1463 SCM_MISC_ERROR ("port is not truncatable", SCM_EOL
);
1464 if (pt
->rw_active
== SCM_PORT_READ
)
1465 scm_end_input (object
);
1466 else if (pt
->rw_active
== SCM_PORT_WRITE
)
1467 ptob
->flush (object
);
1469 ptob
->truncate (object
, c_length
);
1474 off_t_or_off64_t c_length
= scm_to_off_t_or_off64_t (length
);
1475 char *str
= scm_to_locale_string (object
);
1477 SCM_SYSCALL (rv
= truncate_or_truncate64 (str
, c_length
));
1484 return SCM_UNSPECIFIED
;
1488 SCM_DEFINE (scm_port_line
, "port-line", 1, 0, 0,
1490 "Return the current line number for @var{port}.\n"
1492 "The first line of a file is 0. But you might want to add 1\n"
1493 "when printing line numbers, since starting from 1 is\n"
1494 "traditional in error messages, and likely to be more natural to\n"
1496 #define FUNC_NAME s_scm_port_line
1498 port
= SCM_COERCE_OUTPORT (port
);
1499 SCM_VALIDATE_OPENPORT (1, port
);
1500 return scm_from_int (SCM_LINUM (port
));
1504 SCM_DEFINE (scm_set_port_line_x
, "set-port-line!", 2, 0, 0,
1505 (SCM port
, SCM line
),
1506 "Set the current line number for @var{port} to @var{line}. The\n"
1507 "first line of a file is 0.")
1508 #define FUNC_NAME s_scm_set_port_line_x
1510 port
= SCM_COERCE_OUTPORT (port
);
1511 SCM_VALIDATE_OPENPORT (1, port
);
1512 SCM_PTAB_ENTRY (port
)->line_number
= scm_to_int (line
);
1513 return SCM_UNSPECIFIED
;
1517 SCM_DEFINE (scm_port_column
, "port-column", 1, 0, 0,
1519 "Return the current column number of @var{port}.\n"
1520 "If the number is\n"
1521 "unknown, the result is #f. Otherwise, the result is a 0-origin integer\n"
1522 "- i.e. the first character of the first line is line 0, column 0.\n"
1523 "(However, when you display a file position, for example in an error\n"
1524 "message, we recommend you add 1 to get 1-origin integers. This is\n"
1525 "because lines and column numbers traditionally start with 1, and that is\n"
1526 "what non-programmers will find most natural.)")
1527 #define FUNC_NAME s_scm_port_column
1529 port
= SCM_COERCE_OUTPORT (port
);
1530 SCM_VALIDATE_OPENPORT (1, port
);
1531 return scm_from_int (SCM_COL (port
));
1535 SCM_DEFINE (scm_set_port_column_x
, "set-port-column!", 2, 0, 0,
1536 (SCM port
, SCM column
),
1537 "Set the current column of @var{port}. Before reading the first\n"
1538 "character on a line the column should be 0.")
1539 #define FUNC_NAME s_scm_set_port_column_x
1541 port
= SCM_COERCE_OUTPORT (port
);
1542 SCM_VALIDATE_OPENPORT (1, port
);
1543 SCM_PTAB_ENTRY (port
)->column_number
= scm_to_int (column
);
1544 return SCM_UNSPECIFIED
;
1548 SCM_DEFINE (scm_port_filename
, "port-filename", 1, 0, 0,
1550 "Return the filename associated with @var{port}. This function returns\n"
1551 "the strings \"standard input\", \"standard output\" and \"standard error\"\n"
1552 "when called on the current input, output and error ports respectively.")
1553 #define FUNC_NAME s_scm_port_filename
1555 port
= SCM_COERCE_OUTPORT (port
);
1556 SCM_VALIDATE_OPENPORT (1, port
);
1557 return SCM_FILENAME (port
);
1561 SCM_DEFINE (scm_set_port_filename_x
, "set-port-filename!", 2, 0, 0,
1562 (SCM port
, SCM filename
),
1563 "Change the filename associated with @var{port}, using the current input\n"
1564 "port if none is specified. Note that this does not change the port's\n"
1565 "source of data, but only the value that is returned by\n"
1566 "@code{port-filename} and reported in diagnostic output.")
1567 #define FUNC_NAME s_scm_set_port_filename_x
1569 port
= SCM_COERCE_OUTPORT (port
);
1570 SCM_VALIDATE_OPENPORT (1, port
);
1571 /* We allow the user to set the filename to whatever he likes. */
1572 SCM_SET_FILENAME (port
, filename
);
1573 return SCM_UNSPECIFIED
;
1578 scm_print_port_mode (SCM exp
, SCM port
)
1580 scm_puts (SCM_CLOSEDP (exp
)
1582 : (SCM_RDNG
& SCM_CELL_WORD_0 (exp
)
1583 ? (SCM_WRTNG
& SCM_CELL_WORD_0 (exp
)
1586 : (SCM_WRTNG
& SCM_CELL_WORD_0 (exp
)
1593 scm_port_print (SCM exp
, SCM port
, scm_print_state
*pstate SCM_UNUSED
)
1595 char *type
= SCM_PTOBNAME (SCM_PTOBNUM (exp
));
1598 scm_puts ("#<", port
);
1599 scm_print_port_mode (exp
, port
);
1600 scm_puts (type
, port
);
1601 scm_putc (' ', port
);
1602 scm_uintprint (SCM_CELL_WORD_1 (exp
), 16, port
);
1603 scm_putc ('>', port
);
1608 scm_ports_prehistory ()
1611 scm_ptobs
= (scm_t_ptob_descriptor
*) scm_malloc (sizeof (scm_t_ptob_descriptor
));
1618 scm_t_bits scm_tc16_void_port
= 0;
1620 static int fill_input_void_port (SCM port SCM_UNUSED
)
1626 write_void_port (SCM port SCM_UNUSED
,
1627 const void *data SCM_UNUSED
,
1628 size_t size SCM_UNUSED
)
1633 scm_i_void_port (long mode_bits
)
1635 scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex
);
1637 SCM answer
= scm_new_port_table_entry (scm_tc16_void_port
);
1638 scm_t_port
* pt
= SCM_PTAB_ENTRY(answer
);
1640 scm_port_non_buffer (pt
);
1642 SCM_SETSTREAM (answer
, 0);
1643 SCM_SET_CELL_TYPE (answer
, scm_tc16_void_port
| mode_bits
);
1644 scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex
);
1650 scm_void_port (char *mode_str
)
1652 return scm_i_void_port (scm_mode_bits (mode_str
));
1655 SCM_DEFINE (scm_sys_make_void_port
, "%make-void-port", 1, 0, 0,
1657 "Create and return a new void port. A void port acts like\n"
1658 "@file{/dev/null}. The @var{mode} argument\n"
1659 "specifies the input/output modes for this port: see the\n"
1660 "documentation for @code{open-file} in @ref{File Ports}.")
1661 #define FUNC_NAME s_scm_sys_make_void_port
1663 return scm_i_void_port (scm_i_mode_bits (mode
));
1668 /* Initialization. */
1673 /* lseek() symbols. */
1674 scm_c_define ("SEEK_SET", scm_from_int (SEEK_SET
));
1675 scm_c_define ("SEEK_CUR", scm_from_int (SEEK_CUR
));
1676 scm_c_define ("SEEK_END", scm_from_int (SEEK_END
));
1678 scm_tc16_void_port
= scm_make_port_type ("void", fill_input_void_port
,
1681 cur_inport_fluid
= scm_permanent_object (scm_make_fluid ());
1682 cur_outport_fluid
= scm_permanent_object (scm_make_fluid ());
1683 cur_errport_fluid
= scm_permanent_object (scm_make_fluid ());
1684 cur_loadport_fluid
= scm_permanent_object (scm_make_fluid ());
1686 #include "libguile/ports.x"