1 /* Copyright (C) 1995-1999, 2000, 2001, 2002, 2003, 2004, 2006, 2008,
2 * 2009, 2010, 2011, 2012, 2013 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
34 #include "libguile/_scm.h"
35 #include "libguile/chars.h"
36 #include "libguile/continuations.h"
37 #include "libguile/smob.h"
38 #include "libguile/control.h"
39 #include "libguile/eval.h"
40 #include "libguile/macros.h"
41 #include "libguile/procprop.h"
42 #include "libguile/read.h"
43 #include "libguile/programs.h"
44 #include "libguile/alist.h"
45 #include "libguile/struct.h"
46 #include "libguile/ports.h"
47 #include "libguile/ports-internal.h"
48 #include "libguile/root.h"
49 #include "libguile/strings.h"
50 #include "libguile/strports.h"
51 #include "libguile/vectors.h"
52 #include "libguile/numbers.h"
53 #include "libguile/vm.h"
55 #include "libguile/validate.h"
56 #include "libguile/print.h"
58 #include "libguile/private-options.h"
62 /* Character printers. */
64 #define PORT_CONVERSION_HANDLER(port) \
65 SCM_PTAB_ENTRY (port)->ilseq_handler
67 static size_t display_string (const void *, int, size_t, SCM
,
68 scm_t_string_failed_conversion_handler
);
70 static int display_character (scm_t_wchar
, SCM
,
71 scm_t_string_failed_conversion_handler
);
73 static void write_character (scm_t_wchar
, SCM
, int);
75 static void write_character_escaped (scm_t_wchar
, int, SCM
);
79 /* {Names of immediate symbols}
81 * This table must agree with the declarations in scm.h: {Immediate Symbols}.
84 /* This table must agree with the list of flags in tags.h. */
85 static const char *iflagnames
[] =
88 "#nil", /* Elisp nil value. Should print from elisp as symbol `nil'. */
89 "#<XXX UNUSED LISP FALSE -- DO NOT USE -- SHOULD NEVER BE SEEN XXX>",
92 "#<XXX UNUSED BOOLEAN 0 -- DO NOT USE -- SHOULD NEVER BE SEEN XXX>",
93 "#<XXX UNUSED BOOLEAN 1 -- DO NOT USE -- SHOULD NEVER BE SEEN XXX>",
94 "#<XXX UNUSED BOOLEAN 2 -- DO NOT USE -- SHOULD NEVER BE SEEN XXX>",
99 /* Unbound slot marker for GOOPS. For internal use in GOOPS only. */
103 SCM_SYMBOL (sym_reader
, "reader");
105 scm_t_option scm_print_opts
[] = {
106 { SCM_OPTION_SCM
, "highlight-prefix", (scm_t_bits
)SCM_BOOL_F_BITS
,
107 "The string to print before highlighted values." },
108 { SCM_OPTION_SCM
, "highlight-suffix", (scm_t_bits
)SCM_BOOL_F_BITS
,
109 "The string to print after highlighted values." },
110 { SCM_OPTION_SCM
, "quote-keywordish-symbols", (scm_t_bits
)SCM_BOOL_F_BITS
,
111 "How to print symbols that have a colon as their first or last character. "
112 "The value '#f' does not quote the colons; '#t' quotes them; "
113 "'reader' quotes them when the reader option 'keywords' is not '#f'." },
114 { SCM_OPTION_BOOLEAN
, "escape-newlines", 1,
115 "Render newlines as \\n when printing using `write'." },
119 SCM_DEFINE (scm_print_options
, "print-options-interface", 0, 1, 0,
121 "Option interface for the print options. Instead of using\n"
122 "this procedure directly, use the procedures\n"
123 "@code{print-enable}, @code{print-disable}, @code{print-set!}\n"
124 "and @code{print-options}.")
125 #define FUNC_NAME s_scm_print_options
127 SCM ans
= scm_options (setting
,
135 /* {Printing of Scheme Objects}
138 /* Detection of circular references.
140 * Due to other constraints in the implementation, this code has bad
141 * time complexity (O (depth * N)), The printer code can be
142 * rewritten to be O(N).
144 #define PUSH_REF(pstate, obj) \
147 PSTATE_STACK_SET (pstate, pstate->top, obj); \
149 if (pstate->top == pstate->ceiling) \
150 grow_ref_stack (pstate); \
153 #define ENTER_NESTED_DATA(pstate, obj, label) \
156 register unsigned long i; \
157 for (i = 0; i < pstate->top; ++i) \
158 if (scm_is_eq (PSTATE_STACK_REF (pstate, i), (obj))) \
160 if (pstate->fancyp) \
162 if (pstate->top - pstate->list_offset >= pstate->level) \
164 scm_putc_unlocked ('#', port); \
168 PUSH_REF(pstate, obj); \
171 #define EXIT_NESTED_DATA(pstate) \
175 PSTATE_STACK_SET (pstate, pstate->top, SCM_UNDEFINED); \
179 SCM scm_print_state_vtable
= SCM_BOOL_F
;
180 static SCM print_state_pool
= SCM_EOL
;
181 scm_i_pthread_mutex_t print_state_mutex
= SCM_I_PTHREAD_MUTEX_INITIALIZER
;
183 #ifdef GUILE_DEBUG /* Used for debugging purposes */
185 SCM_DEFINE (scm_current_pstate
, "current-pstate", 0, 0, 0,
187 "Return the current-pstate -- the car of the\n"
188 "@code{print_state_pool}. @code{current-pstate} is only\n"
189 "included in @code{--enable-guile-debug} builds.")
190 #define FUNC_NAME s_scm_current_pstate
192 if (!scm_is_null (print_state_pool
))
193 return SCM_CAR (print_state_pool
);
201 #define PSTATE_SIZE 50L
204 make_print_state (void)
207 = scm_make_struct (scm_print_state_vtable
, SCM_INUM0
, SCM_EOL
);
208 scm_print_state
*pstate
= SCM_PRINT_STATE (print_state
);
209 pstate
->ref_vect
= scm_c_make_vector (PSTATE_SIZE
, SCM_UNDEFINED
);
210 pstate
->ceiling
= SCM_SIMPLE_VECTOR_LENGTH (pstate
->ref_vect
);
211 pstate
->highlight_objects
= SCM_EOL
;
216 scm_make_print_state ()
218 SCM answer
= SCM_BOOL_F
;
220 /* First try to allocate a print state from the pool */
221 scm_i_pthread_mutex_lock (&print_state_mutex
);
222 if (!scm_is_null (print_state_pool
))
224 answer
= SCM_CAR (print_state_pool
);
225 print_state_pool
= SCM_CDR (print_state_pool
);
227 scm_i_pthread_mutex_unlock (&print_state_mutex
);
229 return scm_is_false (answer
) ? make_print_state () : answer
;
233 scm_free_print_state (SCM print_state
)
236 scm_print_state
*pstate
= SCM_PRINT_STATE (print_state
);
237 /* Cleanup before returning print state to pool.
238 * It is better to do it here. Doing it in scm_prin1
239 * would cost more since that function is called much more
243 pstate
->revealed
= 0;
244 pstate
->highlight_objects
= SCM_EOL
;
245 scm_i_pthread_mutex_lock (&print_state_mutex
);
246 handle
= scm_cons (print_state
, print_state_pool
);
247 print_state_pool
= handle
;
248 scm_i_pthread_mutex_unlock (&print_state_mutex
);
252 scm_i_port_with_print_state (SCM port
, SCM print_state
)
254 if (SCM_UNBNDP (print_state
))
256 if (SCM_PORT_WITH_PS_P (port
))
259 print_state
= scm_make_print_state ();
260 /* port does not need to be coerced since it doesn't have ps */
263 port
= SCM_COERCE_OUTPORT (port
);
264 SCM_RETURN_NEWSMOB (scm_tc16_port_with_ps
,
265 SCM_UNPACK (scm_cons (port
, print_state
)));
269 grow_ref_stack (scm_print_state
*pstate
)
271 SCM old_vect
= pstate
->ref_vect
;
272 size_t old_size
= SCM_SIMPLE_VECTOR_LENGTH (old_vect
);
273 size_t new_size
= 2 * pstate
->ceiling
;
274 SCM new_vect
= scm_c_make_vector (new_size
, SCM_UNDEFINED
);
277 for (i
= 0; i
!= old_size
; ++i
)
278 SCM_SIMPLE_VECTOR_SET (new_vect
, i
, SCM_SIMPLE_VECTOR_REF (old_vect
, i
));
280 pstate
->ref_vect
= new_vect
;
281 pstate
->ceiling
= new_size
;
284 #define PSTATE_STACK_REF(p,i) SCM_SIMPLE_VECTOR_REF((p)->ref_vect, (i))
285 #define PSTATE_STACK_SET(p,i,v) SCM_SIMPLE_VECTOR_SET((p)->ref_vect, (i), (v))
288 print_circref (SCM port
, scm_print_state
*pstate
, SCM ref
)
291 long self
= pstate
->top
- 1;
293 if (scm_is_pair (PSTATE_STACK_REF (pstate
, i
)))
297 if (!scm_is_pair (PSTATE_STACK_REF (pstate
, i
-1))
298 || !scm_is_eq (SCM_CDR (PSTATE_STACK_REF (pstate
, i
-1)),
299 SCM_CDR (PSTATE_STACK_REF (pstate
, i
))))
305 for (i
= pstate
->top
- 1; 1; --i
)
306 if (scm_is_eq (PSTATE_STACK_REF(pstate
, i
), ref
))
308 scm_putc_unlocked ('#', port
);
309 scm_intprint (i
- self
, 10, port
);
310 scm_putc_unlocked ('#', port
);
313 /* Print the name of a symbol. */
316 quote_keywordish_symbols (void)
318 SCM option
= SCM_PRINT_KEYWORD_STYLE
;
320 if (scm_is_false (option
))
322 if (scm_is_eq (option
, sym_reader
))
323 return scm_is_true (SCM_PACK (SCM_KEYWORD_STYLE
));
327 #define INITIAL_IDENTIFIER_MASK \
328 (UC_CATEGORY_MASK_Lu | UC_CATEGORY_MASK_Ll | UC_CATEGORY_MASK_Lt \
329 | UC_CATEGORY_MASK_Lm | UC_CATEGORY_MASK_Lo | UC_CATEGORY_MASK_Mn \
330 | UC_CATEGORY_MASK_Nl | UC_CATEGORY_MASK_No | UC_CATEGORY_MASK_Pd \
331 | UC_CATEGORY_MASK_Pc | UC_CATEGORY_MASK_Po | UC_CATEGORY_MASK_Sc \
332 | UC_CATEGORY_MASK_Sm | UC_CATEGORY_MASK_Sk | UC_CATEGORY_MASK_So \
333 | UC_CATEGORY_MASK_Co)
335 #define SUBSEQUENT_IDENTIFIER_MASK \
336 (INITIAL_IDENTIFIER_MASK \
337 | UC_CATEGORY_MASK_Nd | UC_CATEGORY_MASK_Mc | UC_CATEGORY_MASK_Me)
339 /* FIXME: Cache this information on the symbol, somehow. */
341 symbol_has_extended_read_syntax (SCM sym
)
343 size_t pos
, len
= scm_i_symbol_length (sym
);
346 /* The empty symbol. */
350 c
= scm_i_symbol_ref (sym
, 0);
360 /* Some initial-character constraints. */
364 /* Symbols that look like keywords. */
365 return quote_keywordish_symbols ();
368 /* Single dot conflicts with dotted-pair notation. */
371 /* Fall through to check numbers. */
384 /* Number-ish symbols. Numbers with radixes already caught be #
386 if (scm_is_true (scm_i_string_to_number (scm_symbol_to_string (sym
), 10)))
394 /* Other disallowed first characters. */
395 if (!uc_is_general_category_withtable (c
, INITIAL_IDENTIFIER_MASK
))
398 /* Keywords can be identified by trailing colons too. */
399 if (scm_i_symbol_ref (sym
, len
- 1) == ':')
400 return quote_keywordish_symbols ();
402 /* Otherwise, any character that's in the identifier category mask is
403 fine to pass through as-is, provided it's not one of the ASCII
404 delimiters like `;'. */
405 for (pos
= 1; pos
< len
; pos
++)
407 c
= scm_i_symbol_ref (sym
, pos
);
408 if (!uc_is_general_category_withtable (c
, SUBSEQUENT_IDENTIFIER_MASK
))
410 else if (c
== '"' || c
== ';' || c
== '#')
418 print_normal_symbol (SCM sym
, SCM port
)
421 scm_t_string_failed_conversion_handler strategy
;
423 len
= scm_i_symbol_length (sym
);
424 strategy
= SCM_PTAB_ENTRY (port
)->ilseq_handler
;
426 if (scm_i_is_narrow_symbol (sym
))
427 display_string (scm_i_symbol_chars (sym
), 1, len
, port
, strategy
);
429 display_string (scm_i_symbol_wide_chars (sym
), 0, len
, port
, strategy
);
433 print_extended_symbol (SCM sym
, SCM port
)
436 scm_t_string_failed_conversion_handler strategy
;
438 len
= scm_i_symbol_length (sym
);
439 strategy
= PORT_CONVERSION_HANDLER (port
);
441 scm_lfwrite_unlocked ("#{", 2, port
);
443 for (pos
= 0; pos
< len
; pos
++)
445 scm_t_wchar c
= scm_i_symbol_ref (sym
, pos
);
447 if (uc_is_general_category_withtable (c
,
448 SUBSEQUENT_IDENTIFIER_MASK
449 | UC_CATEGORY_MASK_Zs
))
451 if (!display_character (c
, port
, strategy
)
452 || (c
== '\\' && !display_character (c
, port
, strategy
)))
453 scm_encoding_error ("print_extended_symbol", errno
,
454 "cannot convert to output locale",
455 port
, SCM_MAKE_CHAR (c
));
459 display_string ("\\x", 1, 2, port
, iconveh_question_mark
);
460 scm_intprint (c
, 16, port
);
461 display_character (';', port
, iconveh_question_mark
);
465 scm_lfwrite_unlocked ("}#", 2, port
);
468 /* FIXME: allow R6RS hex escapes instead of #{...}#. */
470 print_symbol (SCM sym
, SCM port
)
472 if (symbol_has_extended_read_syntax (sym
))
473 print_extended_symbol (sym
, port
);
475 print_normal_symbol (sym
, port
);
479 scm_print_symbol_name (const char *str
, size_t len
, SCM port
)
481 SCM symbol
= scm_from_utf8_symboln (str
, len
);
482 print_symbol (symbol
, port
);
485 /* Print generally. Handles both write and display according to PSTATE.
487 SCM_GPROC(s_write
, "write", 1, 1, 0, scm_write
, g_write
);
488 SCM_GPROC(s_display
, "display", 1, 1, 0, scm_display
, g_display
);
490 static void iprin1 (SCM exp
, SCM port
, scm_print_state
*pstate
);
493 /* Print a character as an octal or hex escape. */
494 #define PRINT_CHAR_ESCAPE(i, port) \
497 if (!SCM_R6RS_ESCAPES_P) \
498 scm_intprint (i, 8, port); \
501 scm_puts_unlocked ("x", port); \
502 scm_intprint (i, 16, port); \
509 scm_iprin1 (SCM exp
, SCM port
, scm_print_state
*pstate
)
512 && scm_is_true (scm_memq (exp
, pstate
->highlight_objects
)))
514 scm_display (SCM_PRINT_HIGHLIGHT_PREFIX
, port
);
515 iprin1 (exp
, port
, pstate
);
516 scm_display (SCM_PRINT_HIGHLIGHT_SUFFIX
, port
);
519 iprin1 (exp
, port
, pstate
);
523 iprin1 (SCM exp
, SCM port
, scm_print_state
*pstate
)
525 switch (SCM_ITAG3 (exp
))
529 /* These tc3 tags should never occur in an immediate value. They are
530 * only used in cell types of non-immediates, i. e. the value returned
531 * by SCM_CELL_TYPE (exp) can use these tags.
533 scm_ipruk ("immediate", exp
, port
);
537 scm_intprint (SCM_I_INUM (exp
), 10, port
);
542 if (SCM_WRITINGP (pstate
))
543 write_character (SCM_CHAR (exp
), port
, 0);
546 if (!display_character (SCM_CHAR (exp
), port
,
547 PORT_CONVERSION_HANDLER (port
)))
548 scm_encoding_error (__func__
, errno
,
549 "cannot convert to output locale",
553 else if (SCM_IFLAGP (exp
)
554 && ((size_t) SCM_IFLAGNUM (exp
) < (sizeof iflagnames
/ sizeof (char *))))
556 scm_puts_unlocked (iflagnames
[SCM_IFLAGNUM (exp
)], port
);
560 /* unknown immediate value */
561 scm_ipruk ("immediate", exp
, port
);
565 switch (SCM_TYP7 (exp
))
569 ENTER_NESTED_DATA (pstate
, exp
, circref
);
570 if (SCM_OBJ_CLASS_FLAGS (exp
) & SCM_CLASSF_GOOPS
)
572 SCM pwps
, print
= pstate
->writingp
? g_write
: g_display
;
573 if (SCM_UNPACK (print
) == 0)
575 pwps
= scm_i_port_with_print_state (port
, pstate
->handle
);
576 pstate
->revealed
= 1;
577 scm_call_2 (print
, exp
, pwps
);
582 scm_print_struct (exp
, port
, pstate
);
584 EXIT_NESTED_DATA (pstate
);
587 case scm_tcs_cons_imcar
:
588 case scm_tcs_cons_nimcar
:
589 ENTER_NESTED_DATA (pstate
, exp
, circref
);
590 scm_iprlist ("(", exp
, ')', port
, pstate
);
591 EXIT_NESTED_DATA (pstate
);
594 print_circref (port
, pstate
, exp
);
597 switch SCM_TYP16 (exp
) {
599 scm_bigprint (exp
, port
, pstate
);
602 scm_print_real (exp
, port
, pstate
);
604 case scm_tc16_complex
:
605 scm_print_complex (exp
, port
, pstate
);
607 case scm_tc16_fraction
:
608 scm_i_print_fraction (exp
, port
, pstate
);
612 case scm_tc7_stringbuf
:
613 scm_i_print_stringbuf (exp
, port
, pstate
);
616 if (SCM_WRITINGP (pstate
))
620 display_character ('"', port
, iconveh_question_mark
);
621 len
= scm_i_string_length (exp
);
622 for (i
= 0; i
< len
; ++i
)
623 write_character (scm_i_string_ref (exp
, i
), port
, 1);
625 display_character ('"', port
, iconveh_question_mark
);
626 scm_remember_upto_here_1 (exp
);
632 len
= scm_i_string_length (exp
);
633 printed
= display_string (scm_i_string_data (exp
),
634 scm_i_is_narrow_string (exp
),
636 PORT_CONVERSION_HANDLER (port
));
637 if (SCM_UNLIKELY (printed
< len
))
638 scm_encoding_error (__func__
, errno
,
639 "cannot convert to output locale",
640 port
, scm_c_string_ref (exp
, printed
));
643 scm_remember_upto_here_1 (exp
);
646 if (scm_i_symbol_is_interned (exp
))
648 print_symbol (exp
, port
);
649 scm_remember_upto_here_1 (exp
);
653 scm_puts_unlocked ("#<uninterned-symbol ", port
);
654 print_symbol (exp
, port
);
655 scm_putc_unlocked (' ', port
);
656 scm_uintprint (SCM_UNPACK (exp
), 16, port
);
657 scm_putc_unlocked ('>', port
);
660 case scm_tc7_variable
:
661 scm_i_variable_print (exp
, port
, pstate
);
663 case scm_tc7_program
:
664 scm_i_program_print (exp
, port
, pstate
);
666 case scm_tc7_pointer
:
667 scm_i_pointer_print (exp
, port
, pstate
);
669 case scm_tc7_hashtable
:
670 scm_i_hashtable_print (exp
, port
, pstate
);
672 case scm_tc7_weak_set
:
673 scm_i_weak_set_print (exp
, port
, pstate
);
675 case scm_tc7_weak_table
:
676 scm_i_weak_table_print (exp
, port
, pstate
);
679 scm_i_fluid_print (exp
, port
, pstate
);
681 case scm_tc7_dynamic_state
:
682 scm_i_dynamic_state_print (exp
, port
, pstate
);
685 scm_i_frame_print (exp
, port
, pstate
);
687 case scm_tc7_vm_cont
:
688 scm_i_vm_cont_print (exp
, port
, pstate
);
691 ENTER_NESTED_DATA (pstate
, exp
, circref
);
692 scm_i_print_array (exp
, port
, pstate
);
693 EXIT_NESTED_DATA (pstate
);
695 case scm_tc7_bytevector
:
696 scm_i_print_bytevector (exp
, port
, pstate
);
698 case scm_tc7_bitvector
:
699 scm_i_print_bitvector (exp
, port
, pstate
);
702 ENTER_NESTED_DATA (pstate
, exp
, circref
);
703 scm_puts_unlocked ("#w(", port
);
704 goto common_vector_printer
;
706 ENTER_NESTED_DATA (pstate
, exp
, circref
);
707 scm_puts_unlocked ("#(", port
);
708 common_vector_printer
:
711 long last
= SCM_SIMPLE_VECTOR_LENGTH (exp
) - 1;
714 && SCM_SIMPLE_VECTOR_LENGTH (exp
) > pstate
->length
)
716 last
= pstate
->length
- 1;
719 for (i
= 0; i
< last
; ++i
)
721 scm_iprin1 (scm_c_vector_ref (exp
, i
), port
, pstate
);
722 scm_putc_unlocked (' ', port
);
727 scm_iprin1 (scm_c_vector_ref (exp
, i
), port
, pstate
);
730 scm_puts_unlocked (" ...", port
);
731 scm_putc_unlocked (')', port
);
733 EXIT_NESTED_DATA (pstate
);
737 scm_t_ptob_descriptor
*ptob
= SCM_PORT_DESCRIPTOR (exp
);
738 if (ptob
->print
&& ptob
->print (exp
, port
, pstate
))
743 ENTER_NESTED_DATA (pstate
, exp
, circref
);
744 SCM_SMOB_DESCRIPTOR (exp
).print (exp
, port
, pstate
);
745 EXIT_NESTED_DATA (pstate
);
748 /* case scm_tcs_closures: */
750 scm_ipruk ("type", exp
, port
);
755 /* Print states are necessary for circular reference safe printing.
756 * They are also expensive to allocate. Therefore print states are
757 * kept in a pool so that they can be reused.
760 /* The PORT argument can also be a print-state/port pair, which will
761 * then be used instead of allocating a new print state. This is
762 * useful for continuing a chain of print calls from Scheme. */
765 scm_prin1 (SCM exp
, SCM port
, int writingp
)
767 SCM handle
= SCM_BOOL_F
; /* Will GC protect the handle whilst unlinked */
769 scm_print_state
*pstate
;
772 /* If PORT is a print-state/port pair, use that. Else create a new
775 if (SCM_PORT_WITH_PS_P (port
))
777 pstate_scm
= SCM_PORT_WITH_PS_PS (port
);
778 port
= SCM_PORT_WITH_PS_PORT (port
);
782 /* First try to allocate a print state from the pool */
783 scm_i_pthread_mutex_lock (&print_state_mutex
);
784 if (!scm_is_null (print_state_pool
))
786 handle
= print_state_pool
;
787 print_state_pool
= SCM_CDR (print_state_pool
);
789 scm_i_pthread_mutex_unlock (&print_state_mutex
);
790 if (scm_is_false (handle
))
791 handle
= scm_list_1 (make_print_state ());
792 pstate_scm
= SCM_CAR (handle
);
795 pstate
= SCM_PRINT_STATE (pstate_scm
);
796 old_writingp
= pstate
->writingp
;
797 pstate
->writingp
= writingp
;
798 scm_iprin1 (exp
, port
, pstate
);
799 pstate
->writingp
= old_writingp
;
801 /* Return print state to pool if it has been created above and
802 hasn't escaped to Scheme. */
804 if (scm_is_true (handle
) && !pstate
->revealed
)
806 scm_i_pthread_mutex_lock (&print_state_mutex
);
807 SCM_SETCDR (handle
, print_state_pool
);
808 print_state_pool
= handle
;
809 scm_i_pthread_mutex_unlock (&print_state_mutex
);
813 /* Convert codepoint CH to UTF-8 and store the result in UTF8. Return
814 the number of bytes of the UTF-8-encoded string. */
816 codepoint_to_utf8 (scm_t_wchar ch
, scm_t_uint8 utf8
[4])
819 scm_t_uint32 codepoint
;
821 codepoint
= (scm_t_uint32
) ch
;
823 if (codepoint
<= 0x7f)
826 utf8
[0] = (scm_t_uint8
) codepoint
;
828 else if (codepoint
<= 0x7ffUL
)
831 utf8
[0] = 0xc0 | (codepoint
>> 6);
832 utf8
[1] = 0x80 | (codepoint
& 0x3f);
834 else if (codepoint
<= 0xffffUL
)
837 utf8
[0] = 0xe0 | (codepoint
>> 12);
838 utf8
[1] = 0x80 | ((codepoint
>> 6) & 0x3f);
839 utf8
[2] = 0x80 | (codepoint
& 0x3f);
844 utf8
[0] = 0xf0 | (codepoint
>> 18);
845 utf8
[1] = 0x80 | ((codepoint
>> 12) & 0x3f);
846 utf8
[2] = 0x80 | ((codepoint
>> 6) & 0x3f);
847 utf8
[3] = 0x80 | (codepoint
& 0x3f);
853 #define STR_REF(s, x) \
855 ? (scm_t_wchar) ((unsigned char *) (s))[x] \
856 : ((scm_t_wchar *) (s))[x])
858 /* Write STR to PORT as UTF-8. STR is a LEN-codepoint string; it is
859 narrow if NARROW_P is true, wide otherwise. Return LEN. */
861 display_string_as_utf8 (const void *str
, int narrow_p
, size_t len
,
866 while (len
> printed
)
869 char *input
, utf8_buf
[256];
871 /* Convert STR to UTF-8. */
872 for (i
= printed
, utf8_len
= 0, input
= utf8_buf
;
873 i
< len
&& utf8_len
+ 4 < sizeof (utf8_buf
);
876 utf8_len
+= codepoint_to_utf8 (STR_REF (str
, i
),
877 (scm_t_uint8
*) input
);
878 input
= utf8_buf
+ utf8_len
;
881 /* INPUT was successfully converted, entirely; print the
883 scm_lfwrite_unlocked (utf8_buf
, utf8_len
, port
);
884 printed
+= i
- printed
;
887 assert (printed
== len
);
892 /* Write STR to PORT as ISO-8859-1. STR is a LEN-codepoint string; it
893 is narrow if NARROW_P is true, wide otherwise. Return LEN. */
895 display_string_as_latin1 (const void *str
, int narrow_p
, size_t len
,
897 scm_t_string_failed_conversion_handler strategy
)
903 scm_lfwrite_unlocked (str
, len
, port
);
907 while (printed
< len
)
912 for (i
= 0; i
< sizeof(buf
) && printed
< len
; i
++, printed
++)
914 scm_t_wchar c
= STR_REF (str
, printed
);
922 scm_lfwrite_unlocked (buf
, i
, port
);
924 if (i
< sizeof(buf
) && printed
< len
)
926 if (strategy
== SCM_FAILED_CONVERSION_ERROR
)
928 else if (strategy
== SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE
)
929 write_character_escaped (STR_REF (str
, printed
), 1, port
);
931 /* STRATEGY is `SCM_FAILED_CONVERSION_QUESTION_MARK'. */
932 display_string ("?", 1, 1, port
, strategy
);
940 /* Convert STR through PORT's output conversion descriptor and write the
941 output to PORT. Return the number of codepoints written. */
943 display_string_using_iconv (const void *str
, int narrow_p
, size_t len
,
945 scm_t_string_failed_conversion_handler strategy
)
948 scm_t_iconv_descriptors
*id
;
949 scm_t_port_internal
*pti
= SCM_PORT_GET_INTERNAL (port
);
951 id
= scm_i_port_iconv_descriptors (port
, SCM_PORT_WRITE
);
953 if (SCM_UNLIKELY (pti
->at_stream_start_for_bom_write
&& len
> 0))
955 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
957 /* Record that we're no longer at stream start. */
958 pti
->at_stream_start_for_bom_write
= 0;
960 pti
->at_stream_start_for_bom_read
= 0;
962 /* Write a BOM if appropriate. */
963 if (SCM_UNLIKELY (strcmp(pt
->encoding
, "UTF-16") == 0
964 || strcmp(pt
->encoding
, "UTF-32") == 0))
965 display_character (SCM_UNICODE_BOM
, port
, iconveh_error
);
970 while (len
> printed
)
972 size_t done
, utf8_len
, input_left
, output_left
, i
;
973 size_t codepoints_read
, output_len
;
974 char *input
, *output
;
975 char utf8_buf
[256], encoded_output
[256];
978 /* Convert STR to UTF-8. */
979 for (i
= printed
, utf8_len
= 0, input
= utf8_buf
;
980 i
< len
&& utf8_len
+ 4 < sizeof (utf8_buf
);
983 offsets
[utf8_len
] = i
;
984 utf8_len
+= codepoint_to_utf8 (STR_REF (str
, i
),
985 (scm_t_uint8
*) input
);
986 input
= utf8_buf
+ utf8_len
;
990 input_left
= utf8_len
;
992 output
= encoded_output
;
993 output_left
= sizeof (encoded_output
);
995 done
= iconv (id
->output_cd
, &input
, &input_left
,
996 &output
, &output_left
);
998 output_len
= sizeof (encoded_output
) - output_left
;
1000 if (SCM_UNLIKELY (done
== (size_t) -1))
1002 int errno_save
= errno
;
1004 /* Reset the `iconv' state. */
1005 iconv (id
->output_cd
, NULL
, NULL
, NULL
, NULL
);
1007 /* Print the OUTPUT_LEN bytes successfully converted. */
1008 scm_lfwrite_unlocked (encoded_output
, output_len
, port
);
1010 /* See how many input codepoints these OUTPUT_LEN bytes
1012 codepoints_read
= offsets
[input
- utf8_buf
] - printed
;
1013 printed
+= codepoints_read
;
1015 if (errno_save
== EILSEQ
&&
1016 strategy
!= SCM_FAILED_CONVERSION_ERROR
)
1018 /* Conversion failed somewhere in INPUT and we want to
1019 escape or substitute the offending input character. */
1021 if (strategy
== SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE
)
1025 /* Find CH, the offending codepoint, and escape it. */
1026 ch
= STR_REF (str
, offsets
[input
- utf8_buf
]);
1027 write_character_escaped (ch
, 1, port
);
1030 /* STRATEGY is `SCM_FAILED_CONVERSION_QUESTION_MARK'. */
1031 display_string ("?", 1, 1, port
, strategy
);
1036 /* Something bad happened that we can't handle: bail out. */
1041 /* INPUT was successfully converted, entirely; print the
1043 scm_lfwrite_unlocked (encoded_output
, output_len
, port
);
1044 codepoints_read
= i
- printed
;
1045 printed
+= codepoints_read
;
1054 /* Display the LEN codepoints in STR to PORT according to STRATEGY;
1055 return the number of codepoints successfully displayed. If NARROW_P,
1056 then STR is interpreted as a sequence of `char', denoting a Latin-1
1057 string; otherwise it's interpreted as a sequence of
1060 display_string (const void *str
, int narrow_p
,
1061 size_t len
, SCM port
,
1062 scm_t_string_failed_conversion_handler strategy
)
1064 scm_t_port_internal
*pti
;
1066 pti
= SCM_PORT_GET_INTERNAL (port
);
1068 if (pti
->encoding_mode
== SCM_PORT_ENCODING_MODE_UTF8
)
1069 return display_string_as_utf8 (str
, narrow_p
, len
, port
);
1070 else if (pti
->encoding_mode
== SCM_PORT_ENCODING_MODE_LATIN1
)
1071 return display_string_as_latin1 (str
, narrow_p
, len
, port
, strategy
);
1073 return display_string_using_iconv (str
, narrow_p
, len
, port
, strategy
);
1076 /* Attempt to display CH to PORT according to STRATEGY. Return non-zero
1077 if CH was successfully displayed, zero otherwise (e.g., if it was not
1078 representable in PORT's encoding.) */
1080 display_character (scm_t_wchar ch
, SCM port
,
1081 scm_t_string_failed_conversion_handler strategy
)
1083 return display_string (&ch
, 0, 1, port
, strategy
) == 1;
1086 /* Attempt to pretty-print CH, a combining character, to PORT. Return
1087 zero upon failure, non-zero otherwise. The idea is to print CH above
1088 a dotted circle to make it more visible. */
1090 write_combining_character (scm_t_wchar ch
, SCM port
)
1094 str
[0] = SCM_CODEPOINT_DOTTED_CIRCLE
;
1097 return display_string (str
, 0, 2, port
, iconveh_error
) == 2;
1100 /* Write CH to PORT in its escaped form, using the string escape syntax
1101 if STRING_ESCAPES_P is non-zero. */
1103 write_character_escaped (scm_t_wchar ch
, int string_escapes_p
, SCM port
)
1105 if (string_escapes_p
)
1107 /* Represent CH using the in-string escape syntax. */
1109 static const char hex
[] = "0123456789abcdef";
1110 static const char escapes
[7] = "abtnvfr";
1113 if (ch
>= 0x07 && ch
<= 0x0D && ch
!= 0x0A)
1115 /* Use special escapes for some C0 controls. */
1117 buf
[1] = escapes
[ch
- 0x07];
1118 scm_lfwrite_unlocked (buf
, 2, port
);
1120 else if (!SCM_R6RS_ESCAPES_P
)
1126 buf
[2] = hex
[ch
/ 16];
1127 buf
[3] = hex
[ch
% 16];
1128 scm_lfwrite_unlocked (buf
, 4, port
);
1130 else if (ch
<= 0xFFFF)
1134 buf
[2] = hex
[(ch
& 0xF000) >> 12];
1135 buf
[3] = hex
[(ch
& 0xF00) >> 8];
1136 buf
[4] = hex
[(ch
& 0xF0) >> 4];
1137 buf
[5] = hex
[(ch
& 0xF)];
1138 scm_lfwrite_unlocked (buf
, 6, port
);
1140 else if (ch
> 0xFFFF)
1144 buf
[2] = hex
[(ch
& 0xF00000) >> 20];
1145 buf
[3] = hex
[(ch
& 0xF0000) >> 16];
1146 buf
[4] = hex
[(ch
& 0xF000) >> 12];
1147 buf
[5] = hex
[(ch
& 0xF00) >> 8];
1148 buf
[6] = hex
[(ch
& 0xF0) >> 4];
1149 buf
[7] = hex
[(ch
& 0xF)];
1150 scm_lfwrite_unlocked (buf
, 8, port
);
1155 /* Print an R6RS variable-length hex escape: "\xNNNN;". */
1156 scm_t_wchar ch2
= ch
;
1166 buf
[i
] = hex
[ch2
& 0xF];
1173 scm_lfwrite_unlocked (buf
+ i
, 9 - i
, port
);
1178 /* Represent CH using the character escape syntax. */
1181 name
= scm_i_charname (SCM_MAKE_CHAR (ch
));
1183 scm_puts_unlocked (name
, port
);
1185 PRINT_CHAR_ESCAPE (ch
, port
);
1189 /* Write CH to PORT, escaping it if it's non-graphic or not
1190 representable in PORT's encoding. If STRING_ESCAPES_P is true and CH
1191 needs to be escaped, it is escaped using the in-string escape syntax;
1192 otherwise the character escape syntax is used. */
1194 write_character (scm_t_wchar ch
, SCM port
, int string_escapes_p
)
1197 scm_t_string_failed_conversion_handler strategy
;
1199 strategy
= PORT_CONVERSION_HANDLER (port
);
1201 if (string_escapes_p
)
1203 /* Check if CH deserves special treatment. */
1204 if (ch
== '"' || ch
== '\\')
1206 display_character ('\\', port
, iconveh_question_mark
);
1207 display_character (ch
, port
, strategy
);
1210 else if (ch
== '\n' && SCM_PRINT_ESCAPE_NEWLINES_P
)
1212 display_character ('\\', port
, iconveh_question_mark
);
1213 display_character ('n', port
, strategy
);
1216 else if (ch
== ' ' || ch
== '\n')
1218 display_character (ch
, port
, strategy
);
1224 display_string ("#\\", 1, 2, port
, iconveh_question_mark
);
1226 if (uc_combining_class (ch
) != UC_CCC_NR
)
1227 /* Character is a combining character, so attempt to
1229 printed
= write_combining_character (ch
, port
);
1233 && uc_is_general_category_withtable (ch
,
1234 UC_CATEGORY_MASK_L
|
1235 UC_CATEGORY_MASK_M
|
1236 UC_CATEGORY_MASK_N
|
1237 UC_CATEGORY_MASK_P
|
1238 UC_CATEGORY_MASK_S
))
1239 /* CH is graphic; attempt to display it. */
1240 printed
= display_character (ch
, port
, iconveh_error
);
1243 /* CH isn't graphic or cannot be represented in PORT's encoding. */
1244 write_character_escaped (ch
, string_escapes_p
, port
);
1247 /* Display STR to PORT from START inclusive to END exclusive. */
1249 scm_i_display_substring (SCM str
, size_t start
, size_t end
, SCM port
)
1253 size_t len
, printed
;
1255 buf
= scm_i_string_data (str
);
1257 narrow_p
= scm_i_is_narrow_string (str
);
1258 buf
+= start
* (narrow_p
? sizeof (char) : sizeof (scm_t_wchar
));
1260 printed
= display_string (buf
, narrow_p
, end
- start
, port
,
1261 PORT_CONVERSION_HANDLER (port
));
1263 if (SCM_UNLIKELY (printed
< len
))
1264 scm_encoding_error (__func__
, errno
,
1265 "cannot convert to output locale",
1266 port
, scm_c_string_ref (str
, printed
+ start
));
1270 /* Print an integer.
1274 scm_intprint (scm_t_intmax n
, int radix
, SCM port
)
1276 char num_buf
[SCM_INTBUFLEN
];
1277 scm_lfwrite_unlocked (num_buf
, scm_iint2str (n
, radix
, num_buf
), port
);
1281 scm_uintprint (scm_t_uintmax n
, int radix
, SCM port
)
1283 char num_buf
[SCM_INTBUFLEN
];
1284 scm_lfwrite_unlocked (num_buf
, scm_iuint2str (n
, radix
, num_buf
), port
);
1287 /* Print an object of unrecognized type.
1291 scm_ipruk (char *hdr
, SCM ptr
, SCM port
)
1293 scm_puts_unlocked ("#<unknown-", port
);
1294 scm_puts_unlocked (hdr
, port
);
1295 if (1) /* (scm_in_heap_p (ptr)) */ /* FIXME */
1297 scm_puts_unlocked (" (0x", port
);
1298 scm_uintprint (SCM_CELL_WORD_0 (ptr
), 16, port
);
1299 scm_puts_unlocked (" . 0x", port
);
1300 scm_uintprint (SCM_CELL_WORD_1 (ptr
), 16, port
);
1301 scm_puts_unlocked (") @", port
);
1303 scm_puts_unlocked (" 0x", port
);
1304 scm_uintprint (SCM_UNPACK (ptr
), 16, port
);
1305 scm_putc_unlocked ('>', port
);
1312 scm_iprlist (char *hdr
, SCM exp
, int tlr
, SCM port
, scm_print_state
*pstate
)
1314 register SCM hare
, tortoise
;
1315 long floor
= pstate
->top
- 2;
1316 scm_puts_unlocked (hdr
, port
);
1319 goto fancy_printing
;
1321 /* Run a hare and tortoise so that total time complexity will be
1322 O(depth * N) instead of O(N^2). */
1323 hare
= SCM_CDR (exp
);
1325 while (scm_is_pair (hare
))
1327 if (scm_is_eq (hare
, tortoise
))
1328 goto fancy_printing
;
1329 hare
= SCM_CDR (hare
);
1330 if (!scm_is_pair (hare
))
1332 hare
= SCM_CDR (hare
);
1333 tortoise
= SCM_CDR (tortoise
);
1336 /* No cdr cycles intrinsic to this list */
1337 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
1338 for (exp
= SCM_CDR (exp
); scm_is_pair (exp
); exp
= SCM_CDR (exp
))
1342 for (i
= floor
; i
>= 0; --i
)
1343 if (scm_is_eq (PSTATE_STACK_REF(pstate
, i
), exp
))
1345 PUSH_REF (pstate
, exp
);
1346 scm_putc_unlocked (' ', port
);
1348 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
1350 if (!SCM_NULL_OR_NIL_P (exp
))
1352 scm_puts_unlocked (" . ", port
);
1353 scm_iprin1 (exp
, port
, pstate
);
1357 scm_putc_unlocked (tlr
, port
);
1358 pstate
->top
= floor
+ 2;
1363 long n
= pstate
->length
;
1365 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
1366 exp
= SCM_CDR (exp
); --n
;
1367 for (; scm_is_pair (exp
); exp
= SCM_CDR (exp
))
1369 register unsigned long i
;
1371 for (i
= 0; i
< pstate
->top
; ++i
)
1372 if (scm_is_eq (PSTATE_STACK_REF(pstate
, i
), exp
))
1378 scm_puts_unlocked (" ...", port
);
1384 PUSH_REF(pstate
, exp
);
1385 ++pstate
->list_offset
;
1386 scm_putc_unlocked (' ', port
);
1388 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
1391 if (!SCM_NULL_OR_NIL_P (exp
))
1393 scm_puts_unlocked (" . ", port
);
1394 scm_iprin1 (exp
, port
, pstate
);
1397 pstate
->list_offset
-= pstate
->top
- floor
- 2;
1401 pstate
->list_offset
-= pstate
->top
- floor
- 2;
1404 scm_puts_unlocked (" . ", port
);
1405 print_circref (port
, pstate
, exp
);
1412 scm_valid_oport_value_p (SCM val
)
1414 return (SCM_OPOUTPORTP (val
)
1415 || (SCM_PORT_WITH_PS_P (val
)
1416 && SCM_OPOUTPORTP (SCM_PORT_WITH_PS_PORT (val
))));
1419 /* SCM_GPROC(s_write, "write", 1, 1, 0, scm_write, g_write); */
1422 scm_write (SCM obj
, SCM port
)
1424 if (SCM_UNBNDP (port
))
1425 port
= scm_current_output_port ();
1427 SCM_ASSERT (scm_valid_oport_value_p (port
), port
, SCM_ARG2
, s_write
);
1429 scm_dynwind_begin (0);
1430 scm_dynwind_lock_port (SCM_COERCE_OUTPORT (port
));
1431 scm_prin1 (obj
, port
, 1);
1434 return SCM_UNSPECIFIED
;
1438 /* SCM_GPROC(s_display, "display", 1, 1, 0, scm_display, g_display); */
1441 scm_display (SCM obj
, SCM port
)
1443 if (SCM_UNBNDP (port
))
1444 port
= scm_current_output_port ();
1446 SCM_ASSERT (scm_valid_oport_value_p (port
), port
, SCM_ARG2
, s_display
);
1448 scm_dynwind_begin (0);
1449 scm_dynwind_lock_port (SCM_COERCE_OUTPORT (port
));
1450 scm_prin1 (obj
, port
, 0);
1453 return SCM_UNSPECIFIED
;
1457 SCM_DEFINE (scm_simple_format
, "simple-format", 2, 0, 1,
1458 (SCM destination
, SCM message
, SCM args
),
1459 "Write @var{message} to @var{destination}, defaulting to\n"
1460 "the current output port.\n"
1461 "@var{message} can contain @code{~A} (was @code{%s}) and\n"
1462 "@code{~S} (was @code{%S}) escapes. When printed,\n"
1463 "the escapes are replaced with corresponding members of\n"
1465 "@code{~A} formats using @code{display} and @code{~S} formats\n"
1466 "using @code{write}.\n"
1467 "If @var{destination} is @code{#t}, then use the current output\n"
1468 "port, if @var{destination} is @code{#f}, then return a string\n"
1469 "containing the formatted text. Does not add a trailing newline.")
1470 #define FUNC_NAME s_scm_simple_format
1472 SCM port
, answer
= SCM_UNSPECIFIED
;
1473 int fReturnString
= 0;
1475 size_t start
, p
, end
;
1477 if (scm_is_eq (destination
, SCM_BOOL_T
))
1479 destination
= port
= scm_current_output_port ();
1481 else if (scm_is_false (destination
))
1484 port
= scm_mkstrport (SCM_INUM0
, SCM_BOOL_F
,
1485 SCM_OPN
| SCM_WRTNG
,
1491 SCM_VALIDATE_OPORT_VALUE (1, destination
);
1492 port
= SCM_COERCE_OUTPORT (destination
);
1494 SCM_VALIDATE_STRING (2, message
);
1495 SCM_VALIDATE_REST_ARGUMENT (args
);
1499 end
= scm_i_string_length (message
);
1500 for (p
= start
; p
!= end
; ++p
)
1501 if (scm_i_string_ref (message
, p
) == '~')
1506 switch (scm_i_string_ref (message
, p
))
1515 scm_lfwrite_substr (message
, start
, p
, port
);
1519 scm_lfwrite_substr (message
, start
, p
- 1, port
);
1524 SCM_MISC_ERROR ("FORMAT: Unsupported format option ~~~A - use (ice-9 format) instead",
1525 scm_list_1 (SCM_MAKE_CHAR (scm_i_string_ref (message
, p
))));
1530 if (!scm_is_pair (args
))
1531 SCM_MISC_ERROR ("FORMAT: Missing argument for ~~~A",
1532 scm_list_1 (SCM_MAKE_CHAR (scm_i_string_ref (message
, p
))));
1534 scm_lfwrite_substr (message
, start
, p
- 1, port
);
1535 /* we pass destination here */
1536 scm_prin1 (SCM_CAR (args
), destination
, writingp
);
1537 args
= SCM_CDR (args
);
1541 scm_lfwrite_substr (message
, start
, p
, port
);
1542 if (!scm_is_eq (args
, SCM_EOL
))
1543 SCM_MISC_ERROR ("FORMAT: ~A superfluous arguments",
1544 scm_list_1 (scm_length (args
)));
1547 answer
= scm_strport_to_string (destination
);
1549 return scm_return_first (answer
, message
);
1554 SCM_DEFINE (scm_newline
, "newline", 0, 1, 0,
1556 "Send a newline to @var{port}.\n"
1557 "If @var{port} is omitted, send to the current output port.")
1558 #define FUNC_NAME s_scm_newline
1560 if (SCM_UNBNDP (port
))
1561 port
= scm_current_output_port ();
1563 SCM_VALIDATE_OPORT_VALUE (1, port
);
1565 scm_putc_unlocked ('\n', SCM_COERCE_OUTPORT (port
));
1566 return SCM_UNSPECIFIED
;
1570 SCM_DEFINE (scm_write_char
, "write-char", 1, 1, 0,
1571 (SCM chr
, SCM port
),
1572 "Send character @var{chr} to @var{port}.")
1573 #define FUNC_NAME s_scm_write_char
1575 if (SCM_UNBNDP (port
))
1576 port
= scm_current_output_port ();
1578 SCM_VALIDATE_CHAR (1, chr
);
1579 SCM_VALIDATE_OPORT_VALUE (2, port
);
1581 port
= SCM_COERCE_OUTPORT (port
);
1582 if (!display_character (SCM_CHAR (chr
), port
,
1583 PORT_CONVERSION_HANDLER (port
)))
1584 scm_encoding_error (__func__
, errno
,
1585 "cannot convert to output locale",
1588 return SCM_UNSPECIFIED
;
1594 /* Call back to Scheme code to do the printing of special objects
1595 * (like structs). SCM_PRINTER_APPLY applies PROC to EXP and a smob
1596 * containing PORT and PSTATE. This object can be used as the port for
1597 * display/write etc to continue the current print chain. The REVEALED
1598 * field of PSTATE is set to true to indicate that the print state has
1599 * escaped to Scheme and thus has to be freed by the GC.
1602 scm_t_bits scm_tc16_port_with_ps
;
1604 /* Print exactly as the port itself would */
1607 port_with_ps_print (SCM obj
, SCM port
, scm_print_state
*pstate
)
1609 obj
= SCM_PORT_WITH_PS_PORT (obj
);
1610 return SCM_PORT_DESCRIPTOR (obj
)->print (obj
, port
, pstate
);
1614 scm_printer_apply (SCM proc
, SCM exp
, SCM port
, scm_print_state
*pstate
)
1616 pstate
->revealed
= 1;
1617 return scm_call_2 (proc
, exp
,
1618 scm_i_port_with_print_state (port
, pstate
->handle
));
1621 SCM_DEFINE (scm_port_with_print_state
, "port-with-print-state", 1, 1, 0,
1622 (SCM port
, SCM pstate
),
1623 "Create a new port which behaves like @var{port}, but with an\n"
1624 "included print state @var{pstate}. @var{pstate} is optional.\n"
1625 "If @var{pstate} isn't supplied and @var{port} already has\n"
1626 "a print state, the old print state is reused.")
1627 #define FUNC_NAME s_scm_port_with_print_state
1629 SCM_VALIDATE_OPORT_VALUE (1, port
);
1630 if (!SCM_UNBNDP (pstate
))
1631 SCM_VALIDATE_PRINTSTATE (2, pstate
);
1632 return scm_i_port_with_print_state (port
, pstate
);
1636 SCM_DEFINE (scm_get_print_state
, "get-print-state", 1, 0, 0,
1638 "Return the print state of the port @var{port}. If @var{port}\n"
1639 "has no associated print state, @code{#f} is returned.")
1640 #define FUNC_NAME s_scm_get_print_state
1642 if (SCM_PORT_WITH_PS_P (port
))
1643 return SCM_PORT_WITH_PS_PS (port
);
1644 if (SCM_OUTPUT_PORT_P (port
))
1646 SCM_WRONG_TYPE_ARG (1, port
);
1657 type
= scm_make_vtable (scm_from_locale_string (SCM_PRINT_STATE_LAYOUT
),
1659 scm_set_struct_vtable_name_x (type
, scm_from_latin1_symbol ("print-state"));
1660 scm_print_state_vtable
= type
;
1662 /* Don't want to bind a wrapper class in GOOPS, so pass 0 as arg1. */
1663 scm_tc16_port_with_ps
= scm_make_smob_type (0, 0);
1664 scm_set_smob_print (scm_tc16_port_with_ps
, port_with_ps_print
);
1666 #include "libguile/print.x"
1668 scm_init_opts (scm_print_options
, scm_print_opts
);
1669 scm_print_opts
[SCM_PRINT_HIGHLIGHT_PREFIX_I
].val
=
1670 SCM_UNPACK (scm_from_locale_string ("{"));
1671 scm_print_opts
[SCM_PRINT_HIGHLIGHT_SUFFIX_I
].val
=
1672 SCM_UNPACK (scm_from_locale_string ("}"));
1673 scm_print_opts
[SCM_PRINT_KEYWORD_STYLE_I
].val
= SCM_UNPACK (sym_reader
);