1 /* Copyright (C) 1995-1999 Free Software Foundation, Inc.
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2, or (at your option)
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this software; see the file COPYING. If not, write to
15 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
16 * Boston, MA 02111-1307 USA
18 * As a special exception, the Free Software Foundation gives permission
19 * for additional uses of the text contained in its release of GUILE.
21 * The exception is that, if you link the GUILE library with other files
22 * to produce an executable, this does not by itself cause the
23 * resulting executable to be covered by the GNU General Public License.
24 * Your use of that executable is in no way restricted on account of
25 * linking the GUILE library code into it.
27 * This exception does not however invalidate any other reasons why
28 * the executable file might be covered by the GNU General Public License.
30 * This exception applies only to the code released by the
31 * Free Software Foundation under the name GUILE. If you copy
32 * code from other Free Software Foundation releases into a copy of
33 * GUILE, as the General Public License permits, the exception does
34 * not apply to the code that you add in this way. To avoid misleading
35 * anyone as to the status of such modified files, you must delete
36 * this exception notice from them.
38 * If you write modifications of your own for GUILE, it is your choice
39 * whether to permit this exception to apply to your modifications.
40 * If you do not wish that, delete this exception notice. */
42 /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
43 gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
69 /* {Names of immediate symbols}
71 * This table must agree with the declarations in scm.h: {Immediate Symbols}.
74 char *scm_isymnames
[] =
76 /* This table must agree with the declarations */
92 "#@literal-variable-ref",
93 "#@literal-variable-set!",
96 "#@call-with-current-continuation",
98 /* user visible ISYMS */
112 /* Multi-language support */
127 scm_option scm_print_opts
[] = {
128 { SCM_OPTION_SCM
, "closure-hook", SCM_UNPACK(SCM_BOOL_F
),
129 "Hook for printing closures." },
130 { SCM_OPTION_BOOLEAN
, "source", 0,
131 "Print closures with source." }
134 SCM_DEFINE (scm_print_options
, "print-options-interface", 0, 1, 0,
137 #define FUNC_NAME s_scm_print_options
139 SCM ans
= scm_options (setting
,
148 /* {Printing of Scheme Objects}
151 /* Detection of circular references.
153 * Due to other constraints in the implementation, this code has bad
154 * time complexity (O (depth * N)), The printer code will be
155 * completely rewritten before next release of Guile. The new code
158 #define PUSH_REF(pstate, obj) \
160 pstate->ref_stack[pstate->top++] = (obj); \
161 if (pstate->top == pstate->ceiling) \
162 grow_ref_stack (pstate); \
165 #define ENTER_NESTED_DATA(pstate, obj, label) \
167 register unsigned long i; \
168 for (i = 0; i < pstate->top; ++i) \
169 if (pstate->ref_stack[i] == (obj)) \
171 if (pstate->fancyp) \
173 if (pstate->top - pstate->list_offset >= pstate->level) \
175 scm_putc ('#', port); \
179 PUSH_REF(pstate, obj); \
182 #define EXIT_NESTED_DATA(pstate) { --pstate->top; }
184 SCM scm_print_state_vtable
;
186 static SCM print_state_pool
;
188 #ifdef GUILE_DEBUG /* Used for debugging purposes */
190 SCM_DEFINE (scm_current_pstate
, "current-pstate", 0, 0, 0,
192 "Return the current-pstate--the `cadr' of the print_state_pool.\n"
193 "`current-pstate' is only included in GUILE_DEBUG builds.")
194 #define FUNC_NAME s_scm_current_pstate
196 return SCM_CADR (print_state_pool
);
202 #define PSTATE_SIZE 50L
205 make_print_state (void)
207 SCM print_state
= scm_make_struct (SCM_CAR (print_state_pool
), /* pstate type */
210 scm_print_state
*pstate
= SCM_PRINT_STATE (print_state
);
211 pstate
->ref_vect
= scm_make_vector (SCM_MAKINUM (PSTATE_SIZE
),
213 pstate
->ref_stack
= SCM_VELTS (pstate
->ref_vect
);
214 pstate
->ceiling
= SCM_LENGTH (pstate
->ref_vect
);
219 scm_make_print_state ()
223 /* First try to allocate a print state from the pool */
225 if (SCM_NNULLP (SCM_CDR (print_state_pool
)))
227 answer
= SCM_CADR (print_state_pool
);
228 SCM_SETCDR (print_state_pool
, SCM_CDDR (print_state_pool
));
232 return answer
? answer
: make_print_state ();
236 scm_free_print_state (SCM print_state
)
239 scm_print_state
*pstate
= SCM_PRINT_STATE (print_state
);
240 /* Cleanup before returning print state to pool.
241 * It is better to do it here. Doing it in scm_prin1
242 * would cost more since that function is called much more
246 pstate
->revealed
= 0;
247 SCM_NEWCELL (handle
);
249 SCM_SETCAR (handle
, print_state
);
250 SCM_SETCDR (handle
, SCM_CDR (print_state_pool
));
251 SCM_SETCDR (print_state_pool
, handle
);
256 grow_ref_stack (scm_print_state
*pstate
)
258 int new_size
= 2 * pstate
->ceiling
;
259 scm_vector_set_length_x (pstate
->ref_vect
, SCM_MAKINUM (new_size
));
260 pstate
->ref_stack
= SCM_VELTS (pstate
->ref_vect
);
261 pstate
->ceiling
= new_size
;
266 print_circref (SCM port
,scm_print_state
*pstate
,SCM ref
)
269 int self
= pstate
->top
- 1;
271 if (SCM_CONSP (pstate
->ref_stack
[i
]))
275 if (SCM_NCONSP (pstate
->ref_stack
[i
- 1])
276 || SCM_CDR (pstate
->ref_stack
[i
- 1]) != pstate
->ref_stack
[i
])
282 for (i
= pstate
->top
- 1; 1; --i
)
283 if (pstate
->ref_stack
[i
] == ref
)
285 scm_putc ('#', port
);
286 scm_intprint (i
- self
, 10, port
);
287 scm_putc ('#', port
);
290 /* Print generally. Handles both write and display according to PSTATE.
292 SCM_GPROC(s_write
, "write", 1, 1, 0, scm_write
, g_write
);
293 SCM_GPROC(s_display
, "display", 1, 1, 0, scm_display
, g_display
);
296 scm_iprin1 (SCM exp
, SCM port
, scm_print_state
*pstate
)
299 switch (7 & (int) exp
)
303 scm_intprint (SCM_INUM (exp
), 10, port
);
311 if (SCM_WRITINGP (pstate
))
313 scm_puts ("#\\", port
);
314 if ((i
>= 0) && (i
<= ' ') && scm_charnames
[i
])
315 scm_puts (scm_charnames
[i
], port
);
316 else if (i
< 0 || i
> '\177')
317 scm_intprint (i
, 8, port
);
324 else if (SCM_IFLAGP (exp
)
325 && ((size_t) SCM_ISYMNUM (exp
) < (sizeof scm_isymnames
/ sizeof (char *))))
326 scm_puts (SCM_ISYMCHARS (exp
), port
);
327 else if (SCM_ILOCP (exp
))
329 scm_puts ("#@", port
);
330 scm_intprint ((long) SCM_IFRAME (exp
), 10, port
);
331 scm_putc (SCM_ICDRP (exp
) ? '-' : '+', port
);
332 scm_intprint ((long) SCM_IDIST (exp
), 10, port
);
339 scm_puts ("#@", port
);
340 exp
= SCM_CAR (exp
- 1);
344 scm_ipruk ("immediate", exp
, port
);
347 switch (SCM_TYP7 (exp
))
349 case scm_tcs_cons_gloc
:
351 if (SCM_CDR (SCM_CAR (exp
) - 1L) == 0)
353 ENTER_NESTED_DATA (pstate
, exp
, circref
);
354 if (SCM_OBJ_CLASS_FLAGS (exp
) & SCM_CLASSF_GOOPS
)
356 SCM pwps
, print
= pstate
->writingp
? g_write
: g_display
;
360 scm_tc16_port_with_ps
,
361 scm_cons (port
, pstate
->handle
));
362 scm_call_generic_2 (print
, exp
, pwps
);
367 scm_print_struct (exp
, port
, pstate
);
369 EXIT_NESTED_DATA (pstate
);
373 case scm_tcs_cons_imcar
:
374 case scm_tcs_cons_nimcar
:
375 ENTER_NESTED_DATA (pstate
, exp
, circref
);
376 scm_iprlist ("(", exp
, ')', port
, pstate
);
377 EXIT_NESTED_DATA (pstate
);
380 print_circref (port
, pstate
, exp
);
383 if (!SCM_CLOSUREP (SCM_CDR (exp
)))
385 case scm_tcs_closures
:
386 /* The user supplied print closure procedure must handle
387 macro closures as well. */
388 if (SCM_FALSEP (scm_procedure_p (SCM_PRINT_CLOSURE
))
389 || SCM_FALSEP (scm_printer_apply (SCM_PRINT_CLOSURE
,
393 if (SCM_TYP16 (exp
) == scm_tc16_macro
)
395 /* Printing a macro. */
397 name
= scm_macro_name (exp
);
398 if (!SCM_CLOSUREP (SCM_CDR (exp
)))
401 scm_puts ("#<primitive-", port
);
405 code
= SCM_CODE (SCM_CDR (exp
));
406 env
= SCM_ENV (SCM_CDR (exp
));
407 scm_puts ("#<", port
);
409 if (SCM_UNPACK_CAR(exp
) & (3L << 16))
410 scm_puts ("macro", port
);
412 scm_puts ("syntax", port
);
413 if (SCM_UNPACK_CAR (exp
) & (2L << 16))
414 scm_putc ('!', port
);
418 /* Printing a closure. */
419 name
= scm_procedure_name (exp
);
420 code
= SCM_CODE (exp
);
422 scm_puts ("#<procedure", port
);
424 if (SCM_ROSTRINGP (name
))
426 scm_putc (' ', port
);
427 scm_puts (SCM_ROCHARS (name
), port
);
431 if (SCM_PRINT_SOURCE_P
)
433 code
= scm_unmemocopy (code
,
434 SCM_EXTEND_ENV (SCM_CAR (code
),
437 ENTER_NESTED_DATA (pstate
, exp
, circref
);
438 scm_iprlist (" ", code
, '>', port
, pstate
);
439 EXIT_NESTED_DATA (pstate
);
443 if (SCM_TYP16 (exp
) != scm_tc16_macro
)
445 scm_putc (' ', port
);
446 scm_iprin1 (SCM_CAR (code
), port
, pstate
);
448 scm_putc ('>', port
);
452 scm_putc ('>', port
);
455 case scm_tc7_substring
:
457 if (SCM_WRITINGP (pstate
))
461 scm_putc ('"', port
);
462 for (i
= 0; i
< SCM_ROLENGTH (exp
); ++i
)
463 switch (SCM_ROCHARS (exp
)[i
])
467 scm_putc ('\\', port
);
469 scm_putc (SCM_ROCHARS (exp
)[i
], port
);
471 scm_putc ('"', port
);
475 scm_lfwrite (SCM_ROCHARS (exp
), (scm_sizet
) SCM_ROLENGTH (exp
),
478 case scm_tcs_symbols
:
488 len
= SCM_LENGTH (exp
);
489 str
= SCM_CHARS (exp
);
496 scm_lfwrite ("#{}#", 4, port
);
498 for (end
= pos
; end
< len
; ++end
)
501 #ifdef BRACKETS_AS_PARENS
509 case SCM_WHITE_SPACES
:
510 case SCM_LINE_INCREMENTORS
:
519 scm_lfwrite ("#{", 2, port
);
524 scm_lfwrite (str
+ pos
, end
- pos
, port
);
530 scm_lfwrite (buf
, 2, port
);
552 scm_lfwrite (str
+ pos
, end
- pos
, port
);
554 scm_lfwrite ("}#", 2, port
);
558 ENTER_NESTED_DATA (pstate
, exp
, circref
);
559 if (SCM_IS_WHVEC (exp
))
560 scm_puts ("#wh(", port
);
562 scm_puts ("#w(", port
);
563 goto common_vector_printer
;
566 ENTER_NESTED_DATA (pstate
, exp
, circref
);
567 scm_puts ("#(", port
);
568 common_vector_printer
:
571 int last
= SCM_LENGTH (exp
) - 1;
573 if (pstate
->fancyp
&& SCM_LENGTH (exp
) > pstate
->length
)
575 last
= pstate
->length
- 1;
578 for (i
= 0; i
< last
; ++i
)
581 scm_iprin1 (SCM_VELTS (exp
)[i
], port
, pstate
);
582 scm_putc (' ', port
);
587 scm_iprin1 (SCM_VELTS (exp
)[i
], port
, pstate
);
590 scm_puts (" ...", port
);
591 scm_putc (')', port
);
593 EXIT_NESTED_DATA (pstate
);
604 #ifdef HAVE_LONG_LONGS
607 scm_raprin1 (exp
, port
, pstate
);
611 scm_puts (SCM_SUBR_GENERIC (exp
) && *SCM_SUBR_GENERIC (exp
)
612 ? "#<primitive-generic "
613 : "#<primitive-procedure ",
615 scm_puts (SCM_CHARS (SCM_SNAME (exp
)), port
);
616 scm_putc ('>', port
);
621 SCM proc
= SCM_CCLO_SUBR (exp
);
622 if (proc
== scm_f_gsubr_apply
)
624 /* Print gsubrs as primitives */
625 SCM name
= scm_procedure_name (exp
);
626 scm_puts ("#<primitive-procedure", port
);
627 if (SCM_NFALSEP (name
))
629 scm_putc (' ', port
);
630 scm_puts (SCM_CHARS (name
), port
);
635 scm_puts ("#<compiled-closure ", port
);
636 scm_iprin1 (proc
, port
, pstate
);
638 scm_putc ('>', port
);
643 scm_puts ("#<procedure-with-setter", port
);
645 SCM name
= scm_procedure_name (exp
);
646 if (SCM_NFALSEP (name
))
648 scm_putc (' ', port
);
649 scm_puts (SCM_ROCHARS (name
), port
);
652 scm_putc ('>', port
);
655 scm_puts ("#<continuation ", port
);
656 scm_intprint (SCM_LENGTH (exp
), 10, port
);
657 scm_puts (" @ ", port
);
658 scm_intprint ((long) SCM_CHARS (exp
), 16, port
);
659 scm_putc ('>', port
);
663 register long i
= SCM_PTOBNUM (exp
);
665 && scm_ptobs
[i
].print
666 && (scm_ptobs
[i
].print
) (exp
, port
, pstate
))
673 ENTER_NESTED_DATA (pstate
, exp
, circref
);
674 i
= SCM_SMOBNUM (exp
);
675 if (i
< scm_numsmob
&& scm_smobs
[i
].print
676 && (scm_smobs
[i
].print
) (exp
, port
, pstate
))
678 EXIT_NESTED_DATA (pstate
);
681 EXIT_NESTED_DATA (pstate
);
682 /* Macros have their print field set to NULL. They are
683 handled at the same place as closures in order to achieve
684 non-redundancy. Placing the condition here won't slow
685 down printing of other smobs. */
686 if (SCM_TYP16 (exp
) == scm_tc16_macro
)
691 scm_ipruk ("type", exp
, port
);
696 /* Print states are necessary for circular reference safe printing.
697 * They are also expensive to allocate. Therefore print states are
698 * kept in a pool so that they can be reused.
701 /* The PORT argument can also be a print-state/port pair, which will
702 * then be used instead of allocating a new print state. This is
703 * useful for continuing a chain of print calls from Scheme. */
706 scm_prin1 (SCM exp
, SCM port
, int writingp
)
708 SCM handle
= SCM_BOOL_F
; /* Will GC protect the handle whilst unlinked */
710 scm_print_state
*pstate
;
712 /* If PORT is a print-state/port pair, use that. Else create a new
715 if (SCM_PORT_WITH_PS_P (port
))
717 pstate_scm
= SCM_PORT_WITH_PS_PS (port
);
718 port
= SCM_PORT_WITH_PS_PORT (port
);
722 /* First try to allocate a print state from the pool */
724 if (SCM_NNULLP (SCM_CDR (print_state_pool
)))
726 handle
= SCM_CDR (print_state_pool
);
727 SCM_SETCDR (print_state_pool
, SCM_CDDR (print_state_pool
));
730 if (handle
== SCM_BOOL_F
)
731 handle
= scm_cons (make_print_state (), SCM_EOL
);
732 pstate_scm
= SCM_CAR (handle
);
735 pstate
= SCM_PRINT_STATE (pstate_scm
);
736 pstate
->writingp
= writingp
;
737 scm_iprin1 (exp
, port
, pstate
);
739 /* Return print state to pool if it has been created above and
740 hasn't escaped to Scheme. */
742 if (handle
!= SCM_BOOL_F
&& !pstate
->revealed
)
745 SCM_SETCDR (handle
, SCM_CDR (print_state_pool
));
746 SCM_SETCDR (print_state_pool
, handle
);
756 scm_intprint (long n
, int radix
, SCM port
)
758 char num_buf
[SCM_INTBUFLEN
];
759 scm_lfwrite (num_buf
, scm_iint2str (n
, radix
, num_buf
), port
);
762 /* Print an object of unrecognized type.
766 scm_ipruk (char *hdr
, SCM ptr
, SCM port
)
768 scm_puts ("#<unknown-", port
);
769 scm_puts (hdr
, port
);
772 scm_puts (" (0x", port
);
773 scm_intprint ((int) SCM_CAR (ptr
), 16, port
);
774 scm_puts (" . 0x", port
);
775 scm_intprint ((int) SCM_CDR (ptr
), 16, port
);
776 scm_puts (") @", port
);
778 scm_puts (" 0x", port
);
779 scm_intprint ((int) ptr
, 16, port
);
780 scm_putc ('>', port
);
788 scm_iprlist (char *hdr
,SCM exp
,int tlr
,SCM port
,scm_print_state
*pstate
)
790 register SCM hare
, tortoise
;
791 int floor
= pstate
->top
- 2;
792 scm_puts (hdr
, port
);
797 /* Run a hare and tortoise so that total time complexity will be
798 O(depth * N) instead of O(N^2). */
799 hare
= SCM_CDR (exp
);
801 while (SCM_ECONSP (hare
))
803 if (hare
== tortoise
)
805 hare
= SCM_CDR (hare
);
806 if (SCM_IMP (hare
) || SCM_NECONSP (hare
))
808 hare
= SCM_CDR (hare
);
809 tortoise
= SCM_CDR (tortoise
);
812 /* No cdr cycles intrinsic to this list */
813 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
815 for (; SCM_NIMP (exp
); exp
= SCM_CDR (exp
))
819 if (SCM_NECONSP (exp
))
821 for (i
= floor
; i
>= 0; --i
)
822 if (pstate
->ref_stack
[i
] == exp
)
824 PUSH_REF (pstate
, exp
);
825 scm_putc (' ', port
);
827 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
829 if (SCM_NNULLP (exp
))
831 scm_puts (" . ", port
);
832 scm_iprin1 (exp
, port
, pstate
);
836 scm_putc (tlr
, port
);
837 pstate
->top
= floor
+ 2;
842 int n
= pstate
->length
;
844 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
845 exp
= SCM_CDR (exp
); --n
;
846 for (; SCM_NIMP (exp
); exp
= SCM_CDR (exp
))
848 register unsigned long i
;
850 if (SCM_NECONSP (exp
))
852 for (i
= 0; i
< pstate
->top
; ++i
)
853 if (pstate
->ref_stack
[i
] == exp
)
859 scm_puts (" ...", port
);
865 PUSH_REF(pstate
, exp
);
866 ++pstate
->list_offset
;
867 scm_putc (' ', port
);
869 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
872 if (SCM_NNULLP (exp
))
874 scm_puts (" . ", port
);
875 scm_iprin1 (exp
, port
, pstate
);
878 pstate
->list_offset
-= pstate
->top
- floor
- 2;
882 pstate
->list_offset
-= pstate
->top
- floor
- 2;
885 scm_puts (" . ", port
);
886 print_circref (port
, pstate
, exp
);
893 scm_valid_oport_value_p (SCM val
)
895 return (SCM_OPOUTPORTP (val
)
896 || (SCM_PORT_WITH_PS_P (val
)
897 && SCM_OPOUTPORTP (SCM_PORT_WITH_PS_PORT (val
))));
900 /* SCM_GPROC(s_write, "write", 1, 1, 0, scm_write, g_write); */
903 scm_write (SCM obj
, SCM port
)
905 if (SCM_UNBNDP (port
))
908 SCM_ASSERT (scm_valid_oport_value_p (port
), port
, SCM_ARG2
, s_write
);
910 scm_prin1 (obj
, port
, 1);
914 scm_close_port (port
);
917 return SCM_UNSPECIFIED
;
921 /* SCM_GPROC(s_display, "display", 1, 1, 0, scm_display, g_display); */
924 scm_display (SCM obj
, SCM port
)
926 if (SCM_UNBNDP (port
))
929 SCM_ASSERT (scm_valid_oport_value_p (port
), port
, SCM_ARG2
, s_display
);
931 scm_prin1 (obj
, port
, 0);
935 scm_close_port (port
);
938 return SCM_UNSPECIFIED
;
942 SCM_DEFINE (scm_simple_format
, "simple-format", 2, 0, 1,
943 (SCM destination
, SCM message
, SCM args
),
944 "Write MESSAGE to DESTINATION, defaulting to `current-output-port'.\n"
945 "MESSAGE can contain ~A (was %s) and ~S (was %S) escapes. When printed,\n"
946 "the escapes are replaced with corresponding members of ARGS:\n"
947 "~A formats using `display' and ~S formats using `write'.\n"
948 "If DESTINATION is #t, then use the `current-output-port',\n"
949 "if DESTINATION is #f, then return a string containing the formatted text.\n"
950 "Does not add a trailing newline.")
951 #define FUNC_NAME s_scm_simple_format
953 SCM answer
= SCM_UNSPECIFIED
;
954 int fReturnString
= 0;
959 if (SCM_BOOL_T
== destination
) {
960 destination
= scm_cur_outp
;
961 } else if (SCM_BOOL_F
== destination
) {
963 destination
= scm_mkstrport (SCM_INUM0
,
964 scm_make_string (SCM_INUM0
, SCM_UNDEFINED
),
968 SCM_VALIDATE_OPORT_VALUE (1,destination
);
970 SCM_VALIDATE_STRING(2,message
);
971 SCM_VALIDATE_LIST(3,args
);
973 start
= SCM_ROCHARS (message
);
974 for (p
= start
; *p
!= '\0'; ++p
)
977 if (SCM_IMP (args
) || SCM_NCONSP (args
))
988 scm_lfwrite (start
, p
- start
- 1, destination
);
989 scm_prin1 (SCM_CAR (args
), destination
, writingp
);
990 args
= SCM_CDR (args
);
993 scm_lfwrite (start
, p
- start
, destination
);
996 answer
= scm_strport_to_string (destination
);
998 return scm_return_first(answer
,message
);
1003 SCM_DEFINE (scm_newline
, "newline", 0, 1, 0,
1005 "Send a newline to PORT.")
1006 #define FUNC_NAME s_scm_newline
1008 if (SCM_UNBNDP (port
))
1009 port
= scm_cur_outp
;
1011 SCM_VALIDATE_OPORT_VALUE (1,port
);
1013 scm_putc ('\n', SCM_COERCE_OUTPORT (port
));
1014 return SCM_UNSPECIFIED
;
1018 SCM_DEFINE (scm_write_char
, "write-char", 1, 1, 0,
1019 (SCM chr
, SCM port
),
1020 "Send character CHR to PORT.")
1021 #define FUNC_NAME s_scm_write_char
1023 if (SCM_UNBNDP (port
))
1024 port
= scm_cur_outp
;
1026 SCM_VALIDATE_CHAR (1,chr
);
1027 SCM_VALIDATE_OPORT_VALUE (2,port
);
1029 scm_putc ((int) SCM_CHAR (chr
), SCM_COERCE_OUTPORT (port
));
1033 scm_close_port (port
);
1036 return SCM_UNSPECIFIED
;
1042 /* Call back to Scheme code to do the printing of special objects
1043 * (like structs). SCM_PRINTER_APPLY applies PROC to EXP and a smob
1044 * containing PORT and PSTATE. This object can be used as the port for
1045 * display/write etc to continue the current print chain. The REVEALED
1046 * field of PSTATE is set to true to indicate that the print state has
1047 * escaped to Scheme and thus has to be freed by the GC.
1050 long scm_tc16_port_with_ps
;
1052 /* Print exactly as the port itself would */
1055 print_port_with_ps (SCM obj
, SCM port
, scm_print_state
*pstate
)
1057 obj
= SCM_PORT_WITH_PS_PORT (obj
);
1058 return scm_ptobs
[SCM_PTOBNUM (obj
)].print (obj
, port
, pstate
);
1062 scm_printer_apply (SCM proc
, SCM exp
, SCM port
, scm_print_state
*pstate
)
1065 SCM pair
= scm_cons (port
, pstate
->handle
);
1066 SCM_NEWSMOB (pwps
, scm_tc16_port_with_ps
, pair
);
1067 pstate
->revealed
= 1;
1068 return scm_apply (proc
, exp
, scm_cons (pwps
, scm_listofnull
));
1071 SCM_DEFINE (scm_port_with_print_state
, "port-with-print-state", 2, 0, 0,
1072 (SCM port
, SCM pstate
),
1074 #define FUNC_NAME s_scm_port_with_print_state
1077 SCM_VALIDATE_OPORT_VALUE (1,port
);
1078 SCM_VALIDATE_PRINTSTATE (2,pstate
);
1079 port
= SCM_COERCE_OUTPORT (port
);
1080 SCM_NEWSMOB (pwps
, scm_tc16_port_with_ps
, scm_cons (port
, pstate
));
1085 SCM_DEFINE (scm_get_print_state
, "get-print-state", 1, 0, 0,
1088 #define FUNC_NAME s_scm_get_print_state
1090 if (SCM_PORT_WITH_PS_P (port
))
1091 return SCM_PORT_WITH_PS_PS (port
);
1092 if (SCM_OUTPORTP (port
))
1094 RETURN_SCM_WTA (1,port
);
1103 SCM vtable
, layout
, type
;
1105 scm_init_opts (scm_print_options
, scm_print_opts
, SCM_N_PRINT_OPTIONS
);
1106 vtable
= scm_make_vtable_vtable (scm_make_struct_layout (scm_nullstr
),
1109 layout
= scm_make_struct_layout (scm_makfrom0str (SCM_PRINT_STATE_LAYOUT
));
1110 type
= scm_make_struct (vtable
, SCM_INUM0
, SCM_LIST1 (layout
));
1111 scm_set_struct_vtable_name_x (type
, SCM_CAR (scm_intern0 ("print-state")));
1112 print_state_pool
= scm_permanent_object (scm_cons (type
, SCM_EOL
));
1114 scm_print_state_vtable
= type
;
1116 /* Don't want to bind a wrapper class in GOOPS, so pass 0 as arg1. */
1117 scm_tc16_port_with_ps
= scm_make_smob_type (0, 0);
1118 scm_set_smob_mark (scm_tc16_port_with_ps
, scm_markcdr
);
1119 scm_set_smob_print (scm_tc16_port_with_ps
, print_port_with_ps
);