1 /* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
2 * 2004, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public License
6 * as published by the Free Software Foundation; either version 3 of
7 * the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22 #define _LARGEFILE64_SOURCE /* ask for stat64 etc */
30 #include "libguile/_scm.h"
31 #include "libguile/strings.h"
32 #include "libguile/validate.h"
33 #include "libguile/gc.h"
34 #include "libguile/posix.h"
35 #include "libguile/dynwind.h"
36 #include "libguile/hashtab.h"
38 #include "libguile/fports.h"
49 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
56 #include <sys/types.h>
58 #include <full-write.h>
60 #include "libguile/iselect.h"
62 /* Some defines for Windows (native port, not Cygwin). */
64 # include <sys/stat.h>
65 # include <winsock2.h>
66 #endif /* __MINGW32__ */
68 #include <full-write.h>
70 /* Mingw (version 3.4.5, circa 2006) has ftruncate as an alias for chsize
71 already, but have this code here in case that wasn't so in past versions,
72 or perhaps to help other minimal DOS environments.
74 gnulib ftruncate.c has code using fcntl F_CHSIZE and F_FREESP, which
75 might be possibilities if we've got other systems without ftruncate. */
77 #if defined HAVE_CHSIZE && ! defined HAVE_FTRUNCATE
78 # define ftruncate(fd, size) chsize (fd, size)
79 # undef HAVE_FTRUNCATE
80 # define HAVE_FTRUNCATE 1
83 #if SIZEOF_OFF_T == SIZEOF_INT
84 #define OFF_T_MAX INT_MAX
85 #define OFF_T_MIN INT_MIN
86 #elif SIZEOF_OFF_T == SIZEOF_LONG
87 #define OFF_T_MAX LONG_MAX
88 #define OFF_T_MIN LONG_MIN
89 #elif SIZEOF_OFF_T == SIZEOF_LONG_LONG
90 #define OFF_T_MAX LONG_LONG_MAX
91 #define OFF_T_MIN LONG_LONG_MIN
93 #error Oops, unknown OFF_T size
96 scm_t_bits scm_tc16_fport
;
99 /* default buffer size, used if the O/S won't supply a value. */
100 static const size_t default_buffer_size
= 1024;
102 /* create FPORT buffer with specified sizes (or -1 to use default size or
105 scm_fport_buffer_add (SCM port
, long read_size
, int write_size
)
106 #define FUNC_NAME "scm_fport_buffer_add"
108 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
110 if (read_size
== -1 || write_size
== -1)
113 #ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
115 scm_t_fport
*fp
= SCM_FSTREAM (port
);
117 default_size
= (fstat (fp
->fdes
, &st
) == -1) ? default_buffer_size
120 default_size
= default_buffer_size
;
123 read_size
= default_size
;
124 if (write_size
== -1)
125 write_size
= default_size
;
128 if (SCM_INPUT_PORT_P (port
) && read_size
> 0)
130 pt
->read_buf
= scm_gc_malloc_pointerless (read_size
, "port buffer");
131 pt
->read_pos
= pt
->read_end
= pt
->read_buf
;
132 pt
->read_buf_size
= read_size
;
136 pt
->read_pos
= pt
->read_buf
= pt
->read_end
= &pt
->shortbuf
;
137 pt
->read_buf_size
= 1;
140 if (SCM_OUTPUT_PORT_P (port
) && write_size
> 0)
142 pt
->write_buf
= scm_gc_malloc_pointerless (write_size
, "port buffer");
143 pt
->write_pos
= pt
->write_buf
;
144 pt
->write_buf_size
= write_size
;
148 pt
->write_buf
= pt
->write_pos
= &pt
->shortbuf
;
149 pt
->write_buf_size
= 1;
152 pt
->write_end
= pt
->write_buf
+ pt
->write_buf_size
;
153 if (read_size
> 0 || write_size
> 0)
154 SCM_SET_CELL_WORD_0 (port
, SCM_CELL_WORD_0 (port
) & ~SCM_BUF0
);
156 SCM_SET_CELL_WORD_0 (port
, SCM_CELL_WORD_0 (port
) | SCM_BUF0
);
160 SCM_DEFINE (scm_setvbuf
, "setvbuf", 2, 1, 0,
161 (SCM port
, SCM mode
, SCM size
),
162 "Set the buffering mode for @var{port}. @var{mode} can be:\n"
169 "block buffered, using a newly allocated buffer of @var{size} bytes.\n"
170 "If @var{size} is omitted, a default size will be used.\n"
172 #define FUNC_NAME s_scm_setvbuf
179 port
= SCM_COERCE_OUTPORT (port
);
181 SCM_VALIDATE_OPFPORT (1,port
);
182 cmode
= scm_to_int (mode
);
183 if (cmode
!= _IONBF
&& cmode
!= _IOFBF
&& cmode
!= _IOLBF
)
184 scm_out_of_range (FUNC_NAME
, mode
);
188 SCM_SET_CELL_WORD_0 (port
, SCM_CELL_WORD_0 (port
) | SCM_BUFLINE
);
193 SCM_SET_CELL_WORD_0 (port
, SCM_CELL_WORD_0 (port
) & ~(scm_t_bits
)SCM_BUFLINE
);
196 if (SCM_UNBNDP (size
))
205 csize
= scm_to_int (size
);
206 if (csize
< 0 || (cmode
== _IONBF
&& csize
> 0))
207 scm_out_of_range (FUNC_NAME
, size
);
210 pt
= SCM_PTAB_ENTRY (port
);
212 if (SCM_INPUT_PORT_P (port
))
213 drained
= scm_drain_input (port
);
215 drained
= scm_nullstr
;
217 if (SCM_OUTPUT_PORT_P (port
))
218 scm_flush_unlocked (port
);
220 if (pt
->read_buf
== pt
->putback_buf
)
222 pt
->read_buf
= pt
->saved_read_buf
;
223 pt
->read_pos
= pt
->saved_read_pos
;
224 pt
->read_end
= pt
->saved_read_end
;
225 pt
->read_buf_size
= pt
->saved_read_buf_size
;
227 if (pt
->read_buf
!= &pt
->shortbuf
)
228 scm_gc_free (pt
->read_buf
, pt
->read_buf_size
, "port buffer");
229 if (pt
->write_buf
!= &pt
->shortbuf
)
230 scm_gc_free (pt
->write_buf
, pt
->write_buf_size
, "port buffer");
232 scm_fport_buffer_add (port
, csize
, csize
);
234 if (scm_is_true (drained
) && scm_c_string_length (drained
))
235 scm_unread_string (drained
, port
);
237 return SCM_UNSPECIFIED
;
241 /* Move ports with the specified file descriptor to new descriptors,
242 * resetting the revealed count to 0.
245 scm_i_evict_port (void *closure
, SCM port
)
247 int fd
= * (int*) closure
;
249 if (SCM_FPORTP (port
))
254 /* XXX: In some cases, we can encounter a port with no associated ptab
256 p
= SCM_PTAB_ENTRY (port
);
257 fp
= (p
!= NULL
) ? (scm_t_fport
*) p
->stream
: NULL
;
259 if ((fp
!= NULL
) && (fp
->fdes
== fd
))
263 scm_syserror ("scm_evict_ports");
264 scm_set_port_revealed_x (port
, scm_from_int (0));
270 scm_evict_ports (int fd
)
272 scm_c_port_for_each (scm_i_evict_port
, (void *) &fd
);
276 SCM_DEFINE (scm_file_port_p
, "file-port?", 1, 0, 0,
278 "Determine whether @var{obj} is a port that is related to a file.")
279 #define FUNC_NAME s_scm_file_port_p
281 return scm_from_bool (SCM_FPORTP (obj
));
286 static SCM sys_file_port_name_canonicalization
;
287 SCM_SYMBOL (sym_relative
, "relative");
288 SCM_SYMBOL (sym_absolute
, "absolute");
291 fport_canonicalize_filename (SCM filename
)
293 SCM mode
= scm_fluid_ref (sys_file_port_name_canonicalization
);
295 if (!scm_is_string (filename
))
299 else if (scm_is_eq (mode
, sym_relative
))
303 path
= scm_variable_ref (scm_c_module_lookup (scm_the_root_module (),
305 rel
= scm_i_relativize_path (filename
, path
);
307 return scm_is_true (rel
) ? rel
: filename
;
309 else if (scm_is_eq (mode
, sym_absolute
))
313 str
= scm_to_locale_string (filename
);
314 canon
= canonicalize_file_name (str
);
317 return canon
? scm_take_locale_string (canon
) : filename
;
327 * Return a new port open on a given file.
329 * The mode string must match the pattern: [rwa+]** which
330 * is interpreted in the usual unix way.
332 * Return the new port.
334 SCM_DEFINE (scm_open_file
, "open-file", 2, 0, 0,
335 (SCM filename
, SCM mode
),
336 "Open the file whose name is @var{filename}, and return a port\n"
337 "representing that file. The attributes of the port are\n"
338 "determined by the @var{mode} string. The way in which this is\n"
339 "interpreted is similar to C stdio. The first character must be\n"
340 "one of the following:\n"
343 "Open an existing file for input.\n"
345 "Open a file for output, creating it if it doesn't already exist\n"
346 "or removing its contents if it does.\n"
348 "Open a file for output, creating it if it doesn't already\n"
349 "exist. All writes to the port will go to the end of the file.\n"
350 "The \"append mode\" can be turned off while the port is in use\n"
351 "@pxref{Ports and File Descriptors, fcntl}\n"
353 "The following additional characters can be appended:\n"
356 "Open the underlying file in binary mode, if supported by the system.\n"
357 "Also, open the file using the binary-compatible character encoding\n"
358 "\"ISO-8859-1\", ignoring the port's encoding and the coding declaration\n"
359 "at the top of the input file, if any.\n"
361 "Open the port for both input and output. E.g., @code{r+}: open\n"
362 "an existing file for both input and output.\n"
364 "Create an \"unbuffered\" port. In this case input and output\n"
365 "operations are passed directly to the underlying port\n"
366 "implementation without additional buffering. This is likely to\n"
367 "slow down I/O operations. The buffering mode can be changed\n"
368 "while a port is in use @pxref{Ports and File Descriptors,\n"
371 "Add line-buffering to the port. The port output buffer will be\n"
372 "automatically flushed whenever a newline character is written.\n"
374 "When the file is opened, this procedure will scan for a coding\n"
375 "declaration@pxref{Character Encoding of Source Files}. If present\n"
376 "will use that encoding for interpreting the file. Otherwise, the\n"
377 "port's encoding will be used.\n"
379 "In theory we could create read/write ports which were buffered\n"
380 "in one direction only. However this isn't included in the\n"
381 "current interfaces. If a file cannot be opened with the access\n"
382 "requested, @code{open-file} throws an exception.")
383 #define FUNC_NAME s_scm_open_file
386 int fdes
, flags
= 0, use_encoding
= 1;
387 unsigned int retries
;
388 char *file
, *md
, *ptr
;
390 scm_dynwind_begin (0);
392 file
= scm_to_locale_string (filename
);
393 scm_dynwind_free (file
);
395 md
= scm_to_locale_string (mode
);
396 scm_dynwind_free (md
);
404 flags
|= O_WRONLY
| O_CREAT
| O_TRUNC
;
407 flags
|= O_WRONLY
| O_CREAT
| O_APPEND
;
410 scm_out_of_range (FUNC_NAME
, mode
);
418 flags
= (flags
& ~(O_RDONLY
| O_WRONLY
)) | O_RDWR
;
422 #if defined (O_BINARY)
426 case '0': /* unbuffered: handled later. */
427 case 'l': /* line buffered: handled during output. */
430 scm_out_of_range (FUNC_NAME
, mode
);
435 for (retries
= 0, fdes
= -1;
436 fdes
< 0 && retries
< 2;
439 SCM_SYSCALL (fdes
= open_or_open64 (file
, flags
, 0666));
444 if (en
== EMFILE
&& retries
== 0)
445 /* Run the GC in case it collects open file ports that are no
446 longer referenced. */
447 scm_i_gc (FUNC_NAME
);
449 SCM_SYSERROR_MSG ("~A: ~S",
450 scm_cons (scm_strerror (scm_from_int (en
)),
451 scm_cons (filename
, SCM_EOL
)), en
);
455 /* Create a port from this file descriptor. The port's encoding is initially
456 %default-port-encoding. */
457 port
= scm_i_fdes_to_port (fdes
, scm_i_mode_bits (mode
),
458 fport_canonicalize_filename (filename
));
462 /* If this file has a coding declaration, use that as the port
464 if (SCM_INPUT_PORT_P (port
))
466 char *enc
= scm_i_scan_for_encoding (port
);
468 scm_i_set_port_encoding_x (port
, enc
);
472 /* If this is a binary file, use the binary-friendly ISO-8859-1
474 scm_i_set_port_encoding_x (port
, NULL
);
485 * Try getting the appropiate file flags for a given file descriptor
486 * under Windows. This incorporates some fancy operations because Windows
487 * differentiates between file, pipe and socket descriptors.
490 # define O_ACCMODE 0x0003
493 static int getflags (int fdes
)
497 int error
, optlen
= sizeof (int);
499 /* Is this a socket ? */
500 if (getsockopt (fdes
, SOL_SOCKET
, SO_ERROR
, (void *) &error
, &optlen
) >= 0)
502 /* Maybe a regular file ? */
503 else if (fstat (fdes
, &buf
) < 0)
507 /* Or an anonymous pipe handle ? */
508 if (buf
.st_mode
& _S_IFIFO
)
509 flags
= PeekNamedPipe ((HANDLE
) _get_osfhandle (fdes
), NULL
, 0,
510 NULL
, NULL
, NULL
) ? O_RDONLY
: O_WRONLY
;
512 else if (fdes
== fileno (stdin
) && isatty (fdes
))
514 /* stdout / stderr ? */
515 else if ((fdes
== fileno (stdout
) || fdes
== fileno (stderr
)) &&
523 #endif /* __MINGW32__ */
525 /* Building Guile ports from a file descriptor. */
527 /* Build a Scheme port from an open file descriptor `fdes'.
528 MODE indicates whether FILE is open for reading or writing; it uses
529 the same notation as open-file's second argument.
530 NAME is a string to be used as the port's filename.
533 scm_i_fdes_to_port (int fdes
, long mode_bits
, SCM name
)
534 #define FUNC_NAME "scm_fdes_to_port"
540 /* test that fdes is valid. */
542 flags
= getflags (fdes
);
544 flags
= fcntl (fdes
, F_GETFL
, 0);
550 && ((flags
!= O_WRONLY
&& (mode_bits
& SCM_WRTNG
))
551 || (flags
!= O_RDONLY
&& (mode_bits
& SCM_RDNG
))))
553 SCM_MISC_ERROR ("requested file mode not available on fdes", SCM_EOL
);
556 fp
= (scm_t_fport
*) scm_gc_malloc_pointerless (sizeof (scm_t_fport
),
560 port
= scm_c_make_port (scm_tc16_fport
, mode_bits
, (scm_t_bits
)fp
);
562 SCM_PTAB_ENTRY (port
)->rw_random
= SCM_FDES_RANDOM_P (fdes
);
564 if (mode_bits
& SCM_BUF0
)
565 scm_fport_buffer_add (port
, 0, 0);
567 scm_fport_buffer_add (port
, -1, -1);
569 SCM_SET_FILENAME (port
, name
);
576 scm_fdes_to_port (int fdes
, char *mode
, SCM name
)
578 return scm_i_fdes_to_port (fdes
, scm_mode_bits (mode
), name
);
581 /* Return a lower bound on the number of bytes available for input. */
583 fport_input_waiting (SCM port
)
585 int fdes
= SCM_FSTREAM (port
)->fdes
;
587 /* `FD_SETSIZE', which is 1024 on GNU systems, effectively limits the
588 highest numerical value of file descriptors that can be monitored.
589 Thus, use poll(2) whenever that is possible. */
592 struct pollfd pollfd
= { fdes
, POLLIN
, 0 };
594 if (poll (&pollfd
, 1, 0) < 0)
595 scm_syserror ("fport_input_waiting");
597 return pollfd
.revents
& POLLIN
? 1 : 0;
599 #elif defined(HAVE_SELECT)
600 struct timeval timeout
;
601 SELECT_TYPE read_set
;
602 SELECT_TYPE write_set
;
603 SELECT_TYPE except_set
;
606 FD_ZERO (&write_set
);
607 FD_ZERO (&except_set
);
609 FD_SET (fdes
, &read_set
);
614 if (select (SELECT_SET_SIZE
,
615 &read_set
, &write_set
, &except_set
, &timeout
)
617 scm_syserror ("fport_input_waiting");
618 return FD_ISSET (fdes
, &read_set
) ? 1 : 0;
620 #elif HAVE_IOCTL && defined (FIONREAD)
621 /* Note: cannot test just defined(FIONREAD) here, since mingw has FIONREAD
622 (for use with winsock ioctlsocket()) but not ioctl(). */
623 int fdes
= SCM_FSTREAM (port
)->fdes
;
625 ioctl(fdes
, FIONREAD
, &remir
);
629 scm_misc_error ("fport_input_waiting",
630 "Not fully implemented on this platform",
637 fport_print (SCM exp
, SCM port
, scm_print_state
*pstate SCM_UNUSED
)
639 scm_puts_unlocked ("#<", port
);
640 scm_print_port_mode (exp
, port
);
641 if (SCM_OPFPORTP (exp
))
644 SCM name
= SCM_FILENAME (exp
);
645 if (scm_is_string (name
) || scm_is_symbol (name
))
646 scm_display (name
, port
);
648 scm_puts_unlocked (SCM_PTOBNAME (SCM_PTOBNUM (exp
)), port
);
649 scm_putc_unlocked (' ', port
);
650 fdes
= (SCM_FSTREAM (exp
))->fdes
;
652 #if (defined HAVE_TTYNAME) && (defined HAVE_POSIX)
654 scm_display (scm_ttyname (exp
), port
);
656 #endif /* HAVE_TTYNAME */
657 scm_intprint (fdes
, 10, port
);
661 scm_puts_unlocked (SCM_PTOBNAME (SCM_PTOBNUM (exp
)), port
);
662 scm_putc_unlocked (' ', port
);
663 scm_uintprint ((scm_t_bits
) SCM_PTAB_ENTRY (exp
), 16, port
);
665 scm_putc_unlocked ('>', port
);
669 static void fport_flush (SCM port
);
671 /* fill a port's read-buffer with a single read. returns the first
672 char or EOF if end of file. */
674 fport_fill_input (SCM port
)
677 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
678 scm_t_fport
*fp
= SCM_FSTREAM (port
);
680 SCM_SYSCALL (count
= read (fp
->fdes
, pt
->read_buf
, pt
->read_buf_size
));
682 scm_syserror ("fport_fill_input");
684 return (scm_t_wchar
) EOF
;
687 pt
->read_pos
= pt
->read_buf
;
688 pt
->read_end
= pt
->read_buf
+ count
;
689 return *pt
->read_buf
;
694 fport_seek (SCM port
, scm_t_off offset
, int whence
)
696 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
697 scm_t_fport
*fp
= SCM_FSTREAM (port
);
699 off_t_or_off64_t result
;
701 if (pt
->rw_active
== SCM_PORT_WRITE
)
703 if (offset
!= 0 || whence
!= SEEK_CUR
)
706 result
= rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
710 /* read current position without disturbing the buffer. */
711 rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
712 result
= rv
+ (pt
->write_pos
- pt
->write_buf
);
715 else if (pt
->rw_active
== SCM_PORT_READ
)
717 if (offset
!= 0 || whence
!= SEEK_CUR
)
719 /* could expand to avoid a second seek. */
720 scm_end_input_unlocked (port
);
721 result
= rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
725 /* read current position without disturbing the buffer
726 (particularly the unread-char buffer). */
727 rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
728 result
= rv
- (pt
->read_end
- pt
->read_pos
);
730 if (pt
->read_buf
== pt
->putback_buf
)
731 result
-= pt
->saved_read_end
- pt
->saved_read_pos
;
734 else /* SCM_PORT_NEITHER */
736 result
= rv
= lseek_or_lseek64 (fp
->fdes
, offset
, whence
);
740 scm_syserror ("fport_seek");
746 fport_truncate (SCM port
, scm_t_off length
)
748 scm_t_fport
*fp
= SCM_FSTREAM (port
);
750 if (ftruncate (fp
->fdes
, length
) == -1)
751 scm_syserror ("ftruncate");
755 fport_write (SCM port
, const void *data
, size_t size
)
756 #define FUNC_NAME "fport_write"
758 /* this procedure tries to minimize the number of writes/flushes. */
759 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
761 if (pt
->write_buf
== &pt
->shortbuf
762 || (pt
->write_pos
== pt
->write_buf
&& size
>= pt
->write_buf_size
))
764 /* Unbuffered port, or port with empty buffer and data won't fit in
766 if (full_write (SCM_FPORT_FDES (port
), data
, size
) < size
)
773 scm_t_off space
= pt
->write_end
- pt
->write_pos
;
777 /* data fits in buffer. */
778 memcpy (pt
->write_pos
, data
, size
);
779 pt
->write_pos
+= size
;
780 if (pt
->write_pos
== pt
->write_end
)
783 /* we can skip the line-buffering check if nothing's buffered. */
789 memcpy (pt
->write_pos
, data
, space
);
790 pt
->write_pos
= pt
->write_end
;
793 const void *ptr
= ((const char *) data
) + space
;
794 size_t remaining
= size
- space
;
796 if (size
>= pt
->write_buf_size
)
798 if (full_write (SCM_FPORT_FDES (port
), ptr
, remaining
)
805 memcpy (pt
->write_pos
, ptr
, remaining
);
806 pt
->write_pos
+= remaining
;
811 /* handle line buffering. */
812 if ((SCM_CELL_WORD_0 (port
) & SCM_BUFLINE
) && memchr (data
, '\n', size
))
819 fport_flush (SCM port
)
822 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
823 scm_t_fport
*fp
= SCM_FSTREAM (port
);
824 size_t count
= pt
->write_pos
- pt
->write_buf
;
826 written
= full_write (fp
->fdes
, pt
->write_buf
, count
);
828 scm_syserror ("scm_flush");
830 pt
->write_pos
= pt
->write_buf
;
831 pt
->rw_active
= SCM_PORT_NEITHER
;
834 /* clear the read buffer and adjust the file position for unread bytes. */
836 fport_end_input (SCM port
, int offset
)
838 scm_t_fport
*fp
= SCM_FSTREAM (port
);
839 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
841 offset
+= pt
->read_end
- pt
->read_pos
;
845 pt
->read_pos
= pt
->read_end
;
846 /* will throw error if unread-char used at beginning of file
847 then attempting to write. seems correct. */
848 if (lseek (fp
->fdes
, -offset
, SEEK_CUR
) == -1)
849 scm_syserror ("fport_end_input");
851 pt
->rw_active
= SCM_PORT_NEITHER
;
855 fport_close (SCM port
)
857 scm_t_fport
*fp
= SCM_FSTREAM (port
);
858 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
862 SCM_SYSCALL (rv
= close (fp
->fdes
));
863 if (rv
== -1 && errno
!= EBADF
)
865 if (scm_gc_running_p
)
866 /* silently ignore the error. scm_error would abort if we
870 scm_syserror ("fport_close");
872 if (pt
->read_buf
== pt
->putback_buf
)
873 pt
->read_buf
= pt
->saved_read_buf
;
874 if (pt
->read_buf
!= &pt
->shortbuf
)
875 scm_gc_free (pt
->read_buf
, pt
->read_buf_size
, "port buffer");
876 if (pt
->write_buf
!= &pt
->shortbuf
)
877 scm_gc_free (pt
->write_buf
, pt
->write_buf_size
, "port buffer");
878 scm_gc_free (fp
, sizeof (*fp
), "file port");
883 fport_free (SCM port
)
892 scm_t_bits tc
= scm_make_port_type ("file", fport_fill_input
, fport_write
);
894 scm_set_port_free (tc
, fport_free
);
895 scm_set_port_print (tc
, fport_print
);
896 scm_set_port_flush (tc
, fport_flush
);
897 scm_set_port_end_input (tc
, fport_end_input
);
898 scm_set_port_close (tc
, fport_close
);
899 scm_set_port_seek (tc
, fport_seek
);
900 scm_set_port_truncate (tc
, fport_truncate
);
901 scm_set_port_input_waiting (tc
, fport_input_waiting
);
909 scm_tc16_fport
= scm_make_fptob ();
911 scm_c_define ("_IOFBF", scm_from_int (_IOFBF
));
912 scm_c_define ("_IOLBF", scm_from_int (_IOLBF
));
913 scm_c_define ("_IONBF", scm_from_int (_IONBF
));
915 sys_file_port_name_canonicalization
= scm_make_fluid ();
916 scm_c_define ("%file-port-name-canonicalization",
917 sys_file_port_name_canonicalization
);
919 #include "libguile/fports.x"