1 /* Copyright (C) 1995-1999, 2000, 2001, 2002, 2003, 2004, 2006, 2008,
2 * 2009, 2010, 2011, 2012, 2013, 2014 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
33 #include <c-strcase.h>
35 #include "libguile/_scm.h"
36 #include "libguile/chars.h"
37 #include "libguile/continuations.h"
38 #include "libguile/smob.h"
39 #include "libguile/control.h"
40 #include "libguile/eval.h"
41 #include "libguile/macros.h"
42 #include "libguile/procprop.h"
43 #include "libguile/read.h"
44 #include "libguile/weaks.h"
45 #include "libguile/programs.h"
46 #include "libguile/alist.h"
47 #include "libguile/struct.h"
48 #include "libguile/ports.h"
49 #include "libguile/ports-internal.h"
50 #include "libguile/root.h"
51 #include "libguile/strings.h"
52 #include "libguile/strports.h"
53 #include "libguile/vectors.h"
54 #include "libguile/numbers.h"
55 #include "libguile/vm.h"
57 #include "libguile/validate.h"
58 #include "libguile/print.h"
60 #include "libguile/private-options.h"
64 /* Character printers. */
66 #define PORT_CONVERSION_HANDLER(port) \
67 SCM_PTAB_ENTRY (port)->ilseq_handler
69 static size_t display_string (const void *, int, size_t, SCM
,
70 scm_t_string_failed_conversion_handler
);
72 static int display_character (scm_t_wchar
, SCM
,
73 scm_t_string_failed_conversion_handler
);
75 static void write_character (scm_t_wchar
, SCM
, int);
77 static void write_character_escaped (scm_t_wchar
, int, SCM
);
81 /* {Names of immediate symbols}
83 * This table must agree with the declarations in scm.h: {Immediate Symbols}.
86 /* This table must agree with the list of flags in tags.h. */
87 static const char *iflagnames
[] =
90 "#nil", /* Elisp nil value. Should print from elisp as symbol `nil'. */
91 "#<XXX UNUSED LISP FALSE -- DO NOT USE -- SHOULD NEVER BE SEEN XXX>",
94 "#<XXX UNUSED BOOLEAN 0 -- DO NOT USE -- SHOULD NEVER BE SEEN XXX>",
95 "#<XXX UNUSED BOOLEAN 1 -- DO NOT USE -- SHOULD NEVER BE SEEN XXX>",
96 "#<XXX UNUSED BOOLEAN 2 -- DO NOT USE -- SHOULD NEVER BE SEEN XXX>",
101 /* Unbound slot marker for GOOPS. For internal use in GOOPS only. */
105 SCM_SYMBOL (sym_reader
, "reader");
107 scm_t_option scm_print_opts
[] = {
108 { SCM_OPTION_SCM
, "highlight-prefix", (scm_t_bits
)SCM_BOOL_F_BITS
,
109 "The string to print before highlighted values." },
110 { SCM_OPTION_SCM
, "highlight-suffix", (scm_t_bits
)SCM_BOOL_F_BITS
,
111 "The string to print after highlighted values." },
112 { SCM_OPTION_SCM
, "quote-keywordish-symbols", (scm_t_bits
)SCM_BOOL_F_BITS
,
113 "How to print symbols that have a colon as their first or last character. "
114 "The value '#f' does not quote the colons; '#t' quotes them; "
115 "'reader' quotes them when the reader option 'keywords' is not '#f'." },
116 { SCM_OPTION_BOOLEAN
, "escape-newlines", 1,
117 "Render newlines as \\n when printing using `write'." },
118 { SCM_OPTION_BOOLEAN
, "r7rs-symbols", 0,
119 "Escape symbols using R7RS |...| symbol notation." },
123 SCM_DEFINE (scm_print_options
, "print-options-interface", 0, 1, 0,
125 "Option interface for the print options. Instead of using\n"
126 "this procedure directly, use the procedures\n"
127 "@code{print-enable}, @code{print-disable}, @code{print-set!}\n"
128 "and @code{print-options}.")
129 #define FUNC_NAME s_scm_print_options
131 SCM ans
= scm_options (setting
,
139 /* {Printing of Scheme Objects}
142 /* Detection of circular references.
144 * Due to other constraints in the implementation, this code has bad
145 * time complexity (O (depth * N)), The printer code can be
146 * rewritten to be O(N).
148 #define PUSH_REF(pstate, obj) \
151 PSTATE_STACK_SET (pstate, pstate->top, obj); \
153 if (pstate->top == pstate->ceiling) \
154 grow_ref_stack (pstate); \
157 #define ENTER_NESTED_DATA(pstate, obj, label) \
160 register unsigned long i; \
161 for (i = 0; i < pstate->top; ++i) \
162 if (scm_is_eq (PSTATE_STACK_REF (pstate, i), (obj))) \
164 if (pstate->fancyp) \
166 if (pstate->top - pstate->list_offset >= pstate->level) \
168 scm_putc ('#', port); \
172 PUSH_REF(pstate, obj); \
175 #define EXIT_NESTED_DATA(pstate) \
179 PSTATE_STACK_SET (pstate, pstate->top, SCM_UNDEFINED); \
183 SCM scm_print_state_vtable
= SCM_BOOL_F
;
184 static SCM print_state_pool
= SCM_EOL
;
185 scm_i_pthread_mutex_t print_state_mutex
= SCM_I_PTHREAD_MUTEX_INITIALIZER
;
187 #ifdef GUILE_DEBUG /* Used for debugging purposes */
189 SCM_DEFINE (scm_current_pstate
, "current-pstate", 0, 0, 0,
191 "Return the current-pstate -- the car of the\n"
192 "@code{print_state_pool}. @code{current-pstate} is only\n"
193 "included in @code{--enable-guile-debug} builds.")
194 #define FUNC_NAME s_scm_current_pstate
196 if (!scm_is_null (print_state_pool
))
197 return SCM_CAR (print_state_pool
);
205 #define PSTATE_SIZE 50L
208 make_print_state (void)
211 = scm_make_struct (scm_print_state_vtable
, SCM_INUM0
, SCM_EOL
);
212 scm_print_state
*pstate
= SCM_PRINT_STATE (print_state
);
213 pstate
->ref_vect
= scm_c_make_vector (PSTATE_SIZE
, SCM_UNDEFINED
);
214 pstate
->ceiling
= SCM_SIMPLE_VECTOR_LENGTH (pstate
->ref_vect
);
215 pstate
->highlight_objects
= SCM_EOL
;
220 scm_make_print_state ()
222 SCM answer
= SCM_BOOL_F
;
224 /* First try to allocate a print state from the pool */
225 scm_i_pthread_mutex_lock (&print_state_mutex
);
226 if (!scm_is_null (print_state_pool
))
228 answer
= SCM_CAR (print_state_pool
);
229 print_state_pool
= SCM_CDR (print_state_pool
);
231 scm_i_pthread_mutex_unlock (&print_state_mutex
);
233 return scm_is_false (answer
) ? make_print_state () : answer
;
237 scm_free_print_state (SCM print_state
)
240 scm_print_state
*pstate
= SCM_PRINT_STATE (print_state
);
241 /* Cleanup before returning print state to pool.
242 * It is better to do it here. Doing it in scm_prin1
243 * would cost more since that function is called much more
247 pstate
->revealed
= 0;
248 pstate
->highlight_objects
= SCM_EOL
;
249 scm_i_pthread_mutex_lock (&print_state_mutex
);
250 handle
= scm_cons (print_state
, print_state_pool
);
251 print_state_pool
= handle
;
252 scm_i_pthread_mutex_unlock (&print_state_mutex
);
256 scm_i_port_with_print_state (SCM port
, SCM print_state
)
258 if (SCM_UNBNDP (print_state
))
260 if (SCM_PORT_WITH_PS_P (port
))
263 print_state
= scm_make_print_state ();
264 /* port does not need to be coerced since it doesn't have ps */
267 port
= SCM_COERCE_OUTPORT (port
);
268 SCM_RETURN_NEWSMOB (scm_tc16_port_with_ps
,
269 SCM_UNPACK (scm_cons (port
, print_state
)));
273 grow_ref_stack (scm_print_state
*pstate
)
275 SCM old_vect
= pstate
->ref_vect
;
276 size_t old_size
= SCM_SIMPLE_VECTOR_LENGTH (old_vect
);
277 size_t new_size
= 2 * pstate
->ceiling
;
278 SCM new_vect
= scm_c_make_vector (new_size
, SCM_UNDEFINED
);
281 for (i
= 0; i
!= old_size
; ++i
)
282 SCM_SIMPLE_VECTOR_SET (new_vect
, i
, SCM_SIMPLE_VECTOR_REF (old_vect
, i
));
284 pstate
->ref_vect
= new_vect
;
285 pstate
->ceiling
= new_size
;
288 #define PSTATE_STACK_REF(p,i) SCM_SIMPLE_VECTOR_REF((p)->ref_vect, (i))
289 #define PSTATE_STACK_SET(p,i,v) SCM_SIMPLE_VECTOR_SET((p)->ref_vect, (i), (v))
292 print_circref (SCM port
, scm_print_state
*pstate
, SCM ref
)
295 long self
= pstate
->top
- 1;
297 if (scm_is_pair (PSTATE_STACK_REF (pstate
, i
)))
301 if (!scm_is_pair (PSTATE_STACK_REF (pstate
, i
-1))
302 || !scm_is_eq (SCM_CDR (PSTATE_STACK_REF (pstate
, i
-1)),
303 SCM_CDR (PSTATE_STACK_REF (pstate
, i
))))
309 for (i
= pstate
->top
- 1; 1; --i
)
310 if (scm_is_eq (PSTATE_STACK_REF(pstate
, i
), ref
))
312 scm_putc ('#', port
);
313 scm_intprint (i
- self
, 10, port
);
314 scm_putc ('#', port
);
317 /* Print the name of a symbol. */
320 quote_keywordish_symbols (void)
322 SCM option
= SCM_PRINT_KEYWORD_STYLE
;
324 if (scm_is_false (option
))
326 if (scm_is_eq (option
, sym_reader
))
327 return scm_is_true (SCM_PACK (SCM_KEYWORD_STYLE
));
331 #define INITIAL_IDENTIFIER_MASK \
332 (UC_CATEGORY_MASK_Lu | UC_CATEGORY_MASK_Ll | UC_CATEGORY_MASK_Lt \
333 | UC_CATEGORY_MASK_Lm | UC_CATEGORY_MASK_Lo | UC_CATEGORY_MASK_Mn \
334 | UC_CATEGORY_MASK_Nl | UC_CATEGORY_MASK_No | UC_CATEGORY_MASK_Pd \
335 | UC_CATEGORY_MASK_Pc | UC_CATEGORY_MASK_Po | UC_CATEGORY_MASK_Sc \
336 | UC_CATEGORY_MASK_Sm | UC_CATEGORY_MASK_Sk | UC_CATEGORY_MASK_So \
337 | UC_CATEGORY_MASK_Co)
339 #define SUBSEQUENT_IDENTIFIER_MASK \
340 (INITIAL_IDENTIFIER_MASK \
341 | UC_CATEGORY_MASK_Nd | UC_CATEGORY_MASK_Mc | UC_CATEGORY_MASK_Me)
344 symbol_has_extended_read_syntax (SCM sym
)
346 size_t pos
, len
= scm_i_symbol_length (sym
);
349 /* The empty symbol. */
353 c
= scm_i_symbol_ref (sym
, 0);
355 /* Single dot; conflicts with dotted-pair notation. */
356 if (len
== 1 && c
== '.')
359 /* Other initial-character constraints. */
360 if (c
== '\'' || c
== '`' || c
== ',' || c
== '"' || c
== ';' || c
== '#')
363 /* R7RS allows neither '|' nor '\' in bare symbols. */
364 if ((c
== '|' || c
== '\\') && SCM_PRINT_R7RS_SYMBOLS_P
)
367 /* Keywords can be identified by trailing colons too. */
368 if (c
== ':' || scm_i_symbol_ref (sym
, len
- 1) == ':')
369 return quote_keywordish_symbols ();
371 /* Number-ish symbols. */
372 if (scm_is_true (scm_i_string_to_number (scm_symbol_to_string (sym
), 10)))
375 /* Other disallowed first characters. */
376 if (!uc_is_general_category_withtable (c
, INITIAL_IDENTIFIER_MASK
))
379 /* Otherwise, any character that's in the identifier category mask is
380 fine to pass through as-is, provided it's not one of the ASCII
381 delimiters like `;'. */
382 for (pos
= 1; pos
< len
; pos
++)
384 c
= scm_i_symbol_ref (sym
, pos
);
385 if (!uc_is_general_category_withtable (c
, SUBSEQUENT_IDENTIFIER_MASK
))
387 else if (c
== '"' || c
== ';' || c
== '#')
389 else if ((c
== '|' || c
== '\\') && SCM_PRINT_R7RS_SYMBOLS_P
)
390 /* R7RS allows neither '|' nor '\' in bare symbols. */
398 print_normal_symbol (SCM sym
, SCM port
)
400 scm_display (scm_symbol_to_string (sym
), port
);
404 print_extended_symbol (SCM sym
, SCM port
)
407 scm_t_string_failed_conversion_handler strategy
;
409 len
= scm_i_symbol_length (sym
);
410 strategy
= PORT_CONVERSION_HANDLER (port
);
412 scm_lfwrite ("#{", 2, port
);
414 for (pos
= 0; pos
< len
; pos
++)
416 scm_t_wchar c
= scm_i_symbol_ref (sym
, pos
);
418 if (uc_is_general_category_withtable (c
,
419 SUBSEQUENT_IDENTIFIER_MASK
420 | UC_CATEGORY_MASK_Zs
))
422 if (!display_character (c
, port
, strategy
)
423 || (c
== '\\' && !display_character (c
, port
, strategy
)))
424 scm_encoding_error ("print_extended_symbol", errno
,
425 "cannot convert to output locale",
426 port
, SCM_MAKE_CHAR (c
));
430 scm_lfwrite ("\\x", 2, port
);
431 scm_intprint (c
, 16, port
);
432 scm_putc (';', port
);
436 scm_lfwrite ("}#", 2, port
);
440 print_r7rs_extended_symbol (SCM sym
, SCM port
)
443 scm_t_string_failed_conversion_handler strategy
;
445 len
= scm_i_symbol_length (sym
);
446 strategy
= PORT_CONVERSION_HANDLER (port
);
448 scm_putc ('|', port
);
450 for (pos
= 0; pos
< len
; pos
++)
452 scm_t_wchar c
= scm_i_symbol_ref (sym
, pos
);
456 case '\a': scm_lfwrite ("\\a", 2, port
); break;
457 case '\b': scm_lfwrite ("\\b", 2, port
); break;
458 case '\t': scm_lfwrite ("\\t", 2, port
); break;
459 case '\n': scm_lfwrite ("\\n", 2, port
); break;
460 case '\r': scm_lfwrite ("\\r", 2, port
); break;
461 case '|': scm_lfwrite ("\\|", 2, port
); break;
462 case '\\': scm_lfwrite ("\\x5c;", 5, port
); break;
464 if (uc_is_general_category_withtable (c
,
465 SUBSEQUENT_IDENTIFIER_MASK
466 | UC_CATEGORY_MASK_Zs
))
468 if (!display_character (c
, port
, strategy
))
469 scm_encoding_error ("print_r7rs_extended_symbol", errno
,
470 "cannot convert to output locale",
471 port
, SCM_MAKE_CHAR (c
));
475 scm_lfwrite ("\\x", 2, port
);
476 scm_intprint (c
, 16, port
);
477 scm_putc (';', port
);
483 scm_putc ('|', port
);
486 /* FIXME: allow R6RS hex escapes instead of #{...}# or |...|. */
488 scm_i_print_symbol_name (SCM sym
, SCM port
)
490 if (!symbol_has_extended_read_syntax (sym
))
491 print_normal_symbol (sym
, port
);
492 else if (SCM_PRINT_R7RS_SYMBOLS_P
)
493 print_r7rs_extended_symbol (sym
, port
);
495 print_extended_symbol (sym
, port
);
499 scm_print_symbol_name (const char *str
, size_t len
, SCM port
)
501 SCM symbol
= scm_from_locale_symboln (str
, len
);
502 scm_i_print_symbol_name (symbol
, port
);
505 /* Print generally. Handles both write and display according to PSTATE.
507 SCM_GPROC(s_write
, "write", 1, 1, 0, scm_write
, g_write
);
508 SCM_GPROC(s_display
, "display", 1, 1, 0, scm_display
, g_display
);
510 static void iprin1 (SCM exp
, SCM port
, scm_print_state
*pstate
);
513 /* Print a character as an octal or hex escape. */
514 #define PRINT_CHAR_ESCAPE(i, port) \
517 if (!SCM_R6RS_ESCAPES_P) \
518 scm_intprint (i, 8, port); \
521 scm_puts ("x", port); \
522 scm_intprint (i, 16, port); \
529 scm_iprin1 (SCM exp
, SCM port
, scm_print_state
*pstate
)
532 && scm_is_true (scm_memq (exp
, pstate
->highlight_objects
)))
534 scm_display (SCM_PRINT_HIGHLIGHT_PREFIX
, port
);
535 iprin1 (exp
, port
, pstate
);
536 scm_display (SCM_PRINT_HIGHLIGHT_SUFFIX
, port
);
539 iprin1 (exp
, port
, pstate
);
543 iprin1 (SCM exp
, SCM port
, scm_print_state
*pstate
)
545 switch (SCM_ITAG3 (exp
))
549 /* These tc3 tags should never occur in an immediate value. They are
550 * only used in cell types of non-immediates, i. e. the value returned
551 * by SCM_CELL_TYPE (exp) can use these tags.
553 scm_ipruk ("immediate", exp
, port
);
557 scm_intprint (SCM_I_INUM (exp
), 10, port
);
562 if (SCM_WRITINGP (pstate
))
563 write_character (SCM_CHAR (exp
), port
, 0);
566 if (!display_character (SCM_CHAR (exp
), port
,
567 PORT_CONVERSION_HANDLER (port
)))
568 scm_encoding_error (__func__
, errno
,
569 "cannot convert to output locale",
573 else if (SCM_IFLAGP (exp
)
574 && ((size_t) SCM_IFLAGNUM (exp
) < (sizeof iflagnames
/ sizeof (char *))))
576 scm_puts (iflagnames
[SCM_IFLAGNUM (exp
)], port
);
580 /* unknown immediate value */
581 scm_ipruk ("immediate", exp
, port
);
585 switch (SCM_TYP7 (exp
))
589 ENTER_NESTED_DATA (pstate
, exp
, circref
);
590 if (SCM_OBJ_CLASS_FLAGS (exp
) & SCM_CLASSF_GOOPS
)
592 SCM pwps
, print
= pstate
->writingp
? g_write
: g_display
;
593 if (SCM_UNPACK (print
) == 0)
595 pwps
= scm_i_port_with_print_state (port
, pstate
->handle
);
596 pstate
->revealed
= 1;
597 scm_call_generic_2 (print
, exp
, pwps
);
602 scm_print_struct (exp
, port
, pstate
);
604 EXIT_NESTED_DATA (pstate
);
607 case scm_tcs_cons_imcar
:
608 case scm_tcs_cons_nimcar
:
609 ENTER_NESTED_DATA (pstate
, exp
, circref
);
610 scm_iprlist ("(", exp
, ')', port
, pstate
);
611 EXIT_NESTED_DATA (pstate
);
614 print_circref (port
, pstate
, exp
);
617 switch SCM_TYP16 (exp
) {
619 scm_bigprint (exp
, port
, pstate
);
622 scm_print_real (exp
, port
, pstate
);
624 case scm_tc16_complex
:
625 scm_print_complex (exp
, port
, pstate
);
627 case scm_tc16_fraction
:
628 scm_i_print_fraction (exp
, port
, pstate
);
633 if (SCM_WRITINGP (pstate
))
637 display_character ('"', port
, iconveh_question_mark
);
638 len
= scm_i_string_length (exp
);
639 for (i
= 0; i
< len
; ++i
)
640 write_character (scm_i_string_ref (exp
, i
), port
, 1);
642 display_character ('"', port
, iconveh_question_mark
);
643 scm_remember_upto_here_1 (exp
);
649 len
= scm_i_string_length (exp
);
650 printed
= display_string (scm_i_string_data (exp
),
651 scm_i_is_narrow_string (exp
),
653 PORT_CONVERSION_HANDLER (port
));
654 if (SCM_UNLIKELY (printed
< len
))
655 scm_encoding_error (__func__
, errno
,
656 "cannot convert to output locale",
657 port
, scm_c_string_ref (exp
, printed
));
660 scm_remember_upto_here_1 (exp
);
663 if (scm_i_symbol_is_interned (exp
))
665 scm_i_print_symbol_name (exp
, port
);
666 scm_remember_upto_here_1 (exp
);
670 scm_puts ("#<uninterned-symbol ", port
);
671 scm_i_print_symbol_name (exp
, port
);
672 scm_putc (' ', port
);
673 scm_uintprint (SCM_UNPACK (exp
), 16, port
);
674 scm_putc ('>', port
);
677 case scm_tc7_variable
:
678 scm_i_variable_print (exp
, port
, pstate
);
680 case scm_tc7_program
:
681 scm_i_program_print (exp
, port
, pstate
);
683 case scm_tc7_pointer
:
684 scm_i_pointer_print (exp
, port
, pstate
);
686 case scm_tc7_hashtable
:
687 scm_i_hashtable_print (exp
, port
, pstate
);
690 scm_i_fluid_print (exp
, port
, pstate
);
692 case scm_tc7_dynamic_state
:
693 scm_i_dynamic_state_print (exp
, port
, pstate
);
696 scm_i_frame_print (exp
, port
, pstate
);
698 case scm_tc7_objcode
:
699 scm_i_objcode_print (exp
, port
, pstate
);
702 scm_i_vm_print (exp
, port
, pstate
);
704 case scm_tc7_vm_cont
:
705 scm_i_vm_cont_print (exp
, port
, pstate
);
708 scm_i_prompt_print (exp
, port
, pstate
);
710 case scm_tc7_with_fluids
:
711 scm_i_with_fluids_print (exp
, port
, pstate
);
714 ENTER_NESTED_DATA (pstate
, exp
, circref
);
715 scm_i_print_array (exp
, port
, pstate
);
716 EXIT_NESTED_DATA (pstate
);
718 case scm_tc7_bytevector
:
719 scm_i_print_bytevector (exp
, port
, pstate
);
721 case scm_tc7_bitvector
:
722 scm_i_print_bitvector (exp
, port
, pstate
);
725 ENTER_NESTED_DATA (pstate
, exp
, circref
);
726 if (SCM_IS_WHVEC (exp
))
727 scm_puts ("#wh(", port
);
729 scm_puts ("#w(", port
);
730 goto common_vector_printer
;
732 ENTER_NESTED_DATA (pstate
, exp
, circref
);
733 scm_puts ("#(", port
);
734 common_vector_printer
:
737 long last
= SCM_SIMPLE_VECTOR_LENGTH (exp
) - 1;
740 && SCM_SIMPLE_VECTOR_LENGTH (exp
) > pstate
->length
)
742 last
= pstate
->length
- 1;
745 if (SCM_I_WVECTP (exp
))
747 /* Elements of weak vectors may not be accessed via the
748 `SIMPLE_VECTOR_REF ()' macro. */
749 for (i
= 0; i
< last
; ++i
)
751 scm_iprin1 (scm_c_vector_ref (exp
, i
),
753 scm_putc (' ', port
);
758 for (i
= 0; i
< last
; ++i
)
760 scm_iprin1 (SCM_SIMPLE_VECTOR_REF (exp
, i
), port
, pstate
);
761 scm_putc (' ', port
);
768 scm_iprin1 (scm_c_vector_ref (exp
, i
), port
, pstate
);
771 scm_puts (" ...", port
);
772 scm_putc (')', port
);
774 EXIT_NESTED_DATA (pstate
);
778 register long i
= SCM_PTOBNUM (exp
);
780 && scm_ptobs
[i
].print
781 && (scm_ptobs
[i
].print
) (exp
, port
, pstate
))
786 ENTER_NESTED_DATA (pstate
, exp
, circref
);
787 SCM_SMOB_DESCRIPTOR (exp
).print (exp
, port
, pstate
);
788 EXIT_NESTED_DATA (pstate
);
791 /* case scm_tcs_closures: */
793 scm_ipruk ("type", exp
, port
);
798 /* Print states are necessary for circular reference safe printing.
799 * They are also expensive to allocate. Therefore print states are
800 * kept in a pool so that they can be reused.
803 /* The PORT argument can also be a print-state/port pair, which will
804 * then be used instead of allocating a new print state. This is
805 * useful for continuing a chain of print calls from Scheme. */
808 scm_prin1 (SCM exp
, SCM port
, int writingp
)
810 SCM handle
= SCM_BOOL_F
; /* Will GC protect the handle whilst unlinked */
812 scm_print_state
*pstate
;
815 /* If PORT is a print-state/port pair, use that. Else create a new
818 if (SCM_PORT_WITH_PS_P (port
))
820 pstate_scm
= SCM_PORT_WITH_PS_PS (port
);
821 port
= SCM_PORT_WITH_PS_PORT (port
);
825 /* First try to allocate a print state from the pool */
826 scm_i_pthread_mutex_lock (&print_state_mutex
);
827 if (!scm_is_null (print_state_pool
))
829 handle
= print_state_pool
;
830 print_state_pool
= SCM_CDR (print_state_pool
);
832 scm_i_pthread_mutex_unlock (&print_state_mutex
);
833 if (scm_is_false (handle
))
834 handle
= scm_list_1 (make_print_state ());
835 pstate_scm
= SCM_CAR (handle
);
838 pstate
= SCM_PRINT_STATE (pstate_scm
);
839 old_writingp
= pstate
->writingp
;
840 pstate
->writingp
= writingp
;
841 scm_iprin1 (exp
, port
, pstate
);
842 pstate
->writingp
= old_writingp
;
844 /* Return print state to pool if it has been created above and
845 hasn't escaped to Scheme. */
847 if (scm_is_true (handle
) && !pstate
->revealed
)
849 scm_i_pthread_mutex_lock (&print_state_mutex
);
850 SCM_SETCDR (handle
, print_state_pool
);
851 print_state_pool
= handle
;
852 scm_i_pthread_mutex_unlock (&print_state_mutex
);
856 /* Convert codepoint CH to UTF-8 and store the result in UTF8. Return
857 the number of bytes of the UTF-8-encoded string. */
859 codepoint_to_utf8 (scm_t_wchar ch
, scm_t_uint8 utf8
[4])
862 scm_t_uint32 codepoint
;
864 codepoint
= (scm_t_uint32
) ch
;
866 if (codepoint
<= 0x7f)
869 utf8
[0] = (scm_t_uint8
) codepoint
;
871 else if (codepoint
<= 0x7ffUL
)
874 utf8
[0] = 0xc0 | (codepoint
>> 6);
875 utf8
[1] = 0x80 | (codepoint
& 0x3f);
877 else if (codepoint
<= 0xffffUL
)
880 utf8
[0] = 0xe0 | (codepoint
>> 12);
881 utf8
[1] = 0x80 | ((codepoint
>> 6) & 0x3f);
882 utf8
[2] = 0x80 | (codepoint
& 0x3f);
887 utf8
[0] = 0xf0 | (codepoint
>> 18);
888 utf8
[1] = 0x80 | ((codepoint
>> 12) & 0x3f);
889 utf8
[2] = 0x80 | ((codepoint
>> 6) & 0x3f);
890 utf8
[3] = 0x80 | (codepoint
& 0x3f);
896 #define STR_REF(s, x) \
898 ? (scm_t_wchar) ((unsigned char *) (s))[x] \
899 : ((scm_t_wchar *) (s))[x])
901 /* Write STR to PORT as UTF-8. STR is a LEN-codepoint string; it is
902 narrow if NARROW_P is true, wide otherwise. Return LEN. */
904 display_string_as_utf8 (const void *str
, int narrow_p
, size_t len
,
909 while (len
> printed
)
912 char *input
, utf8_buf
[256];
914 /* Convert STR to UTF-8. */
915 for (i
= printed
, utf8_len
= 0, input
= utf8_buf
;
916 i
< len
&& utf8_len
+ 4 < sizeof (utf8_buf
);
919 utf8_len
+= codepoint_to_utf8 (STR_REF (str
, i
),
920 (scm_t_uint8
*) input
);
921 input
= utf8_buf
+ utf8_len
;
924 /* INPUT was successfully converted, entirely; print the
926 scm_lfwrite (utf8_buf
, utf8_len
, port
);
927 printed
+= i
- printed
;
930 assert (printed
== len
);
935 /* Convert STR through PORT's output conversion descriptor and write the
936 output to PORT. Return the number of codepoints written. */
938 display_string_using_iconv (const void *str
, int narrow_p
, size_t len
,
940 scm_t_string_failed_conversion_handler strategy
)
943 scm_t_iconv_descriptors
*id
;
944 scm_t_port_internal
*pti
= SCM_PORT_GET_INTERNAL (port
);
946 id
= scm_i_port_iconv_descriptors (port
, SCM_PORT_WRITE
);
948 if (SCM_UNLIKELY (pti
->at_stream_start_for_bom_write
&& len
> 0))
950 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
952 /* Record that we're no longer at stream start. */
953 pti
->at_stream_start_for_bom_write
= 0;
955 pti
->at_stream_start_for_bom_read
= 0;
957 /* Write a BOM if appropriate. */
958 if (SCM_UNLIKELY (c_strcasecmp(pt
->encoding
, "UTF-16") == 0
959 || c_strcasecmp(pt
->encoding
, "UTF-32") == 0))
960 display_character (SCM_UNICODE_BOM
, port
, iconveh_error
);
965 while (len
> printed
)
967 size_t done
, utf8_len
, input_left
, output_left
, i
;
968 size_t codepoints_read
, output_len
;
969 char *input
, *output
;
970 char utf8_buf
[256], encoded_output
[256];
973 /* Convert STR to UTF-8. */
974 for (i
= printed
, utf8_len
= 0, input
= utf8_buf
;
975 i
< len
&& utf8_len
+ 4 < sizeof (utf8_buf
);
978 offsets
[utf8_len
] = i
;
979 utf8_len
+= codepoint_to_utf8 (STR_REF (str
, i
),
980 (scm_t_uint8
*) input
);
981 input
= utf8_buf
+ utf8_len
;
985 input_left
= utf8_len
;
987 output
= encoded_output
;
988 output_left
= sizeof (encoded_output
);
990 done
= iconv (id
->output_cd
, &input
, &input_left
,
991 &output
, &output_left
);
993 output_len
= sizeof (encoded_output
) - output_left
;
995 if (SCM_UNLIKELY (done
== (size_t) -1))
997 int errno_save
= errno
;
999 /* Reset the `iconv' state. */
1000 iconv (id
->output_cd
, NULL
, NULL
, NULL
, NULL
);
1002 /* Print the OUTPUT_LEN bytes successfully converted. */
1003 scm_lfwrite (encoded_output
, output_len
, port
);
1005 /* See how many input codepoints these OUTPUT_LEN bytes
1007 codepoints_read
= offsets
[input
- utf8_buf
] - printed
;
1008 printed
+= codepoints_read
;
1010 if (errno_save
== EILSEQ
&&
1011 strategy
!= SCM_FAILED_CONVERSION_ERROR
)
1013 /* Conversion failed somewhere in INPUT and we want to
1014 escape or substitute the offending input character. */
1016 if (strategy
== SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE
)
1020 /* Find CH, the offending codepoint, and escape it. */
1021 ch
= STR_REF (str
, offsets
[input
- utf8_buf
]);
1022 write_character_escaped (ch
, 1, port
);
1025 /* STRATEGY is `SCM_FAILED_CONVERSION_QUESTION_MARK'. */
1026 display_string ("?", 1, 1, port
, strategy
);
1031 /* Something bad happened that we can't handle: bail out. */
1036 /* INPUT was successfully converted, entirely; print the
1038 scm_lfwrite (encoded_output
, output_len
, port
);
1039 codepoints_read
= i
- printed
;
1040 printed
+= codepoints_read
;
1049 /* Display the LEN codepoints in STR to PORT according to STRATEGY;
1050 return the number of codepoints successfully displayed. If NARROW_P,
1051 then STR is interpreted as a sequence of `char', denoting a Latin-1
1052 string; otherwise it's interpreted as a sequence of
1055 display_string (const void *str
, int narrow_p
,
1056 size_t len
, SCM port
,
1057 scm_t_string_failed_conversion_handler strategy
)
1060 scm_t_port_internal
*pti
;
1062 pti
= SCM_PORT_GET_INTERNAL (port
);
1064 if (pti
->encoding_mode
== SCM_PORT_ENCODING_MODE_UTF8
)
1065 return display_string_as_utf8 (str
, narrow_p
, len
, port
);
1067 return display_string_using_iconv (str
, narrow_p
, len
,
1071 /* Attempt to display CH to PORT according to STRATEGY. Return non-zero
1072 if CH was successfully displayed, zero otherwise (e.g., if it was not
1073 representable in PORT's encoding.) */
1075 display_character (scm_t_wchar ch
, SCM port
,
1076 scm_t_string_failed_conversion_handler strategy
)
1078 return display_string (&ch
, 0, 1, port
, strategy
) == 1;
1081 /* Attempt to pretty-print CH, a combining character, to PORT. Return
1082 zero upon failure, non-zero otherwise. The idea is to print CH above
1083 a dotted circle to make it more visible. */
1085 write_combining_character (scm_t_wchar ch
, SCM port
)
1089 str
[0] = SCM_CODEPOINT_DOTTED_CIRCLE
;
1092 return display_string (str
, 0, 2, port
, iconveh_error
) == 2;
1095 /* Write CH to PORT in its escaped form, using the string escape syntax
1096 if STRING_ESCAPES_P is non-zero. */
1098 write_character_escaped (scm_t_wchar ch
, int string_escapes_p
, SCM port
)
1100 if (string_escapes_p
)
1102 /* Represent CH using the in-string escape syntax. */
1104 static const char hex
[] = "0123456789abcdef";
1105 static const char escapes
[7] = "abtnvfr";
1108 if (ch
>= 0x07 && ch
<= 0x0D && ch
!= 0x0A)
1110 /* Use special escapes for some C0 controls. */
1112 buf
[1] = escapes
[ch
- 0x07];
1113 scm_lfwrite (buf
, 2, port
);
1115 else if (!SCM_R6RS_ESCAPES_P
)
1121 buf
[2] = hex
[ch
/ 16];
1122 buf
[3] = hex
[ch
% 16];
1123 scm_lfwrite (buf
, 4, port
);
1125 else if (ch
<= 0xFFFF)
1129 buf
[2] = hex
[(ch
& 0xF000) >> 12];
1130 buf
[3] = hex
[(ch
& 0xF00) >> 8];
1131 buf
[4] = hex
[(ch
& 0xF0) >> 4];
1132 buf
[5] = hex
[(ch
& 0xF)];
1133 scm_lfwrite (buf
, 6, port
);
1135 else if (ch
> 0xFFFF)
1139 buf
[2] = hex
[(ch
& 0xF00000) >> 20];
1140 buf
[3] = hex
[(ch
& 0xF0000) >> 16];
1141 buf
[4] = hex
[(ch
& 0xF000) >> 12];
1142 buf
[5] = hex
[(ch
& 0xF00) >> 8];
1143 buf
[6] = hex
[(ch
& 0xF0) >> 4];
1144 buf
[7] = hex
[(ch
& 0xF)];
1145 scm_lfwrite (buf
, 8, port
);
1150 /* Print an R6RS variable-length hex escape: "\xNNNN;". */
1151 scm_t_wchar ch2
= ch
;
1161 buf
[i
] = hex
[ch2
& 0xF];
1168 scm_lfwrite (buf
+ i
, 9 - i
, port
);
1173 /* Represent CH using the character escape syntax. */
1176 name
= scm_i_charname (SCM_MAKE_CHAR (ch
));
1178 scm_puts (name
, port
);
1180 PRINT_CHAR_ESCAPE (ch
, port
);
1184 /* Write CH to PORT, escaping it if it's non-graphic or not
1185 representable in PORT's encoding. If STRING_ESCAPES_P is true and CH
1186 needs to be escaped, it is escaped using the in-string escape syntax;
1187 otherwise the character escape syntax is used. */
1189 write_character (scm_t_wchar ch
, SCM port
, int string_escapes_p
)
1192 scm_t_string_failed_conversion_handler strategy
;
1194 strategy
= PORT_CONVERSION_HANDLER (port
);
1196 if (string_escapes_p
)
1198 /* Check if CH deserves special treatment. */
1199 if (ch
== '"' || ch
== '\\')
1201 display_character ('\\', port
, iconveh_question_mark
);
1202 display_character (ch
, port
, strategy
);
1205 else if (ch
== '\n' && SCM_PRINT_ESCAPE_NEWLINES_P
)
1207 display_character ('\\', port
, iconveh_question_mark
);
1208 display_character ('n', port
, strategy
);
1211 else if (ch
== ' ' || ch
== '\n')
1213 display_character (ch
, port
, strategy
);
1219 display_string ("#\\", 1, 2, port
, iconveh_question_mark
);
1221 if (uc_combining_class (ch
) != UC_CCC_NR
)
1222 /* Character is a combining character, so attempt to
1224 printed
= write_combining_character (ch
, port
);
1228 && uc_is_general_category_withtable (ch
,
1229 UC_CATEGORY_MASK_L
|
1230 UC_CATEGORY_MASK_M
|
1231 UC_CATEGORY_MASK_N
|
1232 UC_CATEGORY_MASK_P
|
1233 UC_CATEGORY_MASK_S
))
1234 /* CH is graphic; attempt to display it. */
1235 printed
= display_character (ch
, port
, iconveh_error
);
1238 /* CH isn't graphic or cannot be represented in PORT's encoding. */
1239 write_character_escaped (ch
, string_escapes_p
, port
);
1242 /* Display STR to PORT from START inclusive to END exclusive. */
1244 scm_i_display_substring (SCM str
, size_t start
, size_t end
, SCM port
)
1248 size_t len
, printed
;
1250 buf
= scm_i_string_data (str
);
1252 narrow_p
= scm_i_is_narrow_string (str
);
1253 buf
+= start
* (narrow_p
? sizeof (char) : sizeof (scm_t_wchar
));
1255 printed
= display_string (buf
, narrow_p
, end
- start
, port
,
1256 PORT_CONVERSION_HANDLER (port
));
1258 if (SCM_UNLIKELY (printed
< len
))
1259 scm_encoding_error (__func__
, errno
,
1260 "cannot convert to output locale",
1261 port
, scm_c_string_ref (str
, printed
+ start
));
1265 /* Print an integer.
1269 scm_intprint (scm_t_intmax n
, int radix
, SCM port
)
1271 char num_buf
[SCM_INTBUFLEN
];
1272 scm_lfwrite (num_buf
, scm_iint2str (n
, radix
, num_buf
), port
);
1276 scm_uintprint (scm_t_uintmax n
, int radix
, SCM port
)
1278 char num_buf
[SCM_INTBUFLEN
];
1279 scm_lfwrite (num_buf
, scm_iuint2str (n
, radix
, num_buf
), port
);
1282 /* Print an object of unrecognized type.
1286 scm_ipruk (char *hdr
, SCM ptr
, SCM port
)
1288 scm_puts ("#<unknown-", port
);
1289 scm_puts (hdr
, port
);
1290 if (1) /* (scm_in_heap_p (ptr)) */ /* FIXME */
1292 scm_puts (" (0x", port
);
1293 scm_uintprint (SCM_CELL_WORD_0 (ptr
), 16, port
);
1294 scm_puts (" . 0x", port
);
1295 scm_uintprint (SCM_CELL_WORD_1 (ptr
), 16, port
);
1296 scm_puts (") @", port
);
1298 scm_puts (" 0x", port
);
1299 scm_uintprint (SCM_UNPACK (ptr
), 16, port
);
1300 scm_putc ('>', port
);
1307 scm_iprlist (char *hdr
, SCM exp
, int tlr
, SCM port
, scm_print_state
*pstate
)
1309 register SCM hare
, tortoise
;
1310 long floor
= pstate
->top
- 2;
1311 scm_puts (hdr
, port
);
1314 goto fancy_printing
;
1316 /* Run a hare and tortoise so that total time complexity will be
1317 O(depth * N) instead of O(N^2). */
1318 hare
= SCM_CDR (exp
);
1320 while (scm_is_pair (hare
))
1322 if (scm_is_eq (hare
, tortoise
))
1323 goto fancy_printing
;
1324 hare
= SCM_CDR (hare
);
1325 if (!scm_is_pair (hare
))
1327 hare
= SCM_CDR (hare
);
1328 tortoise
= SCM_CDR (tortoise
);
1331 /* No cdr cycles intrinsic to this list */
1332 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
1333 for (exp
= SCM_CDR (exp
); scm_is_pair (exp
); exp
= SCM_CDR (exp
))
1337 for (i
= floor
; i
>= 0; --i
)
1338 if (scm_is_eq (PSTATE_STACK_REF(pstate
, i
), exp
))
1340 PUSH_REF (pstate
, exp
);
1341 scm_putc (' ', port
);
1343 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
1345 if (!SCM_NULL_OR_NIL_P (exp
))
1347 scm_puts (" . ", port
);
1348 scm_iprin1 (exp
, port
, pstate
);
1352 scm_putc (tlr
, port
);
1353 pstate
->top
= floor
+ 2;
1358 long n
= pstate
->length
;
1360 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
1361 exp
= SCM_CDR (exp
); --n
;
1362 for (; scm_is_pair (exp
); exp
= SCM_CDR (exp
))
1364 register unsigned long i
;
1366 for (i
= 0; i
< pstate
->top
; ++i
)
1367 if (scm_is_eq (PSTATE_STACK_REF(pstate
, i
), exp
))
1373 scm_puts (" ...", port
);
1379 PUSH_REF(pstate
, exp
);
1380 ++pstate
->list_offset
;
1381 scm_putc (' ', port
);
1383 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
1386 if (!SCM_NULL_OR_NIL_P (exp
))
1388 scm_puts (" . ", port
);
1389 scm_iprin1 (exp
, port
, pstate
);
1392 pstate
->list_offset
-= pstate
->top
- floor
- 2;
1396 pstate
->list_offset
-= pstate
->top
- floor
- 2;
1399 scm_puts (" . ", port
);
1400 print_circref (port
, pstate
, exp
);
1407 scm_valid_oport_value_p (SCM val
)
1409 return (SCM_OPOUTPORTP (val
)
1410 || (SCM_PORT_WITH_PS_P (val
)
1411 && SCM_OPOUTPORTP (SCM_PORT_WITH_PS_PORT (val
))));
1414 /* SCM_GPROC(s_write, "write", 1, 1, 0, scm_write, g_write); */
1417 scm_write (SCM obj
, SCM port
)
1419 if (SCM_UNBNDP (port
))
1420 port
= scm_current_output_port ();
1422 SCM_ASSERT (scm_valid_oport_value_p (port
), port
, SCM_ARG2
, s_write
);
1424 scm_prin1 (obj
, port
, 1);
1425 return SCM_UNSPECIFIED
;
1429 /* SCM_GPROC(s_display, "display", 1, 1, 0, scm_display, g_display); */
1432 scm_display (SCM obj
, SCM port
)
1434 if (SCM_UNBNDP (port
))
1435 port
= scm_current_output_port ();
1437 SCM_ASSERT (scm_valid_oport_value_p (port
), port
, SCM_ARG2
, s_display
);
1439 scm_prin1 (obj
, port
, 0);
1440 return SCM_UNSPECIFIED
;
1444 SCM_DEFINE (scm_simple_format
, "simple-format", 2, 0, 1,
1445 (SCM destination
, SCM message
, SCM args
),
1446 "Write @var{message} to @var{destination}, defaulting to\n"
1447 "the current output port.\n"
1448 "@var{message} can contain @code{~A} (was @code{%s}) and\n"
1449 "@code{~S} (was @code{%S}) escapes. When printed,\n"
1450 "the escapes are replaced with corresponding members of\n"
1452 "@code{~A} formats using @code{display} and @code{~S} formats\n"
1453 "using @code{write}.\n"
1454 "If @var{destination} is @code{#t}, then use the current output\n"
1455 "port, if @var{destination} is @code{#f}, then return a string\n"
1456 "containing the formatted text. Does not add a trailing newline.")
1457 #define FUNC_NAME s_scm_simple_format
1459 SCM port
, answer
= SCM_UNSPECIFIED
;
1460 int fReturnString
= 0;
1462 size_t start
, p
, end
;
1464 if (scm_is_eq (destination
, SCM_BOOL_T
))
1466 destination
= port
= scm_current_output_port ();
1468 else if (scm_is_false (destination
))
1471 port
= scm_mkstrport (SCM_INUM0
, SCM_BOOL_F
,
1472 SCM_OPN
| SCM_WRTNG
,
1478 SCM_VALIDATE_OPORT_VALUE (1, destination
);
1479 port
= SCM_COERCE_OUTPORT (destination
);
1481 SCM_VALIDATE_STRING (2, message
);
1482 SCM_VALIDATE_REST_ARGUMENT (args
);
1486 end
= scm_i_string_length (message
);
1487 for (p
= start
; p
!= end
; ++p
)
1488 if (scm_i_string_ref (message
, p
) == '~')
1493 switch (scm_i_string_ref (message
, p
))
1502 scm_lfwrite_substr (message
, start
, p
, port
);
1506 scm_lfwrite_substr (message
, start
, p
- 1, port
);
1511 SCM_MISC_ERROR ("FORMAT: Unsupported format option ~~~A - use (ice-9 format) instead",
1512 scm_list_1 (SCM_MAKE_CHAR (scm_i_string_ref (message
, p
))));
1517 if (!scm_is_pair (args
))
1518 SCM_MISC_ERROR ("FORMAT: Missing argument for ~~~A",
1519 scm_list_1 (SCM_MAKE_CHAR (scm_i_string_ref (message
, p
))));
1521 scm_lfwrite_substr (message
, start
, p
- 1, port
);
1522 /* we pass destination here */
1523 scm_prin1 (SCM_CAR (args
), destination
, writingp
);
1524 args
= SCM_CDR (args
);
1528 scm_lfwrite_substr (message
, start
, p
, port
);
1529 if (!scm_is_eq (args
, SCM_EOL
))
1530 SCM_MISC_ERROR ("FORMAT: ~A superfluous arguments",
1531 scm_list_1 (scm_length (args
)));
1534 answer
= scm_strport_to_string (destination
);
1536 return scm_return_first (answer
, message
);
1541 SCM_DEFINE (scm_newline
, "newline", 0, 1, 0,
1543 "Send a newline to @var{port}.\n"
1544 "If @var{port} is omitted, send to the current output port.")
1545 #define FUNC_NAME s_scm_newline
1547 if (SCM_UNBNDP (port
))
1548 port
= scm_current_output_port ();
1550 SCM_VALIDATE_OPORT_VALUE (1, port
);
1552 scm_putc ('\n', SCM_COERCE_OUTPORT (port
));
1553 return SCM_UNSPECIFIED
;
1557 SCM_DEFINE (scm_write_char
, "write-char", 1, 1, 0,
1558 (SCM chr
, SCM port
),
1559 "Send character @var{chr} to @var{port}.")
1560 #define FUNC_NAME s_scm_write_char
1562 if (SCM_UNBNDP (port
))
1563 port
= scm_current_output_port ();
1565 SCM_VALIDATE_CHAR (1, chr
);
1566 SCM_VALIDATE_OPORT_VALUE (2, port
);
1568 port
= SCM_COERCE_OUTPORT (port
);
1569 if (!display_character (SCM_CHAR (chr
), port
,
1570 PORT_CONVERSION_HANDLER (port
)))
1571 scm_encoding_error (__func__
, errno
,
1572 "cannot convert to output locale",
1575 return SCM_UNSPECIFIED
;
1581 /* Call back to Scheme code to do the printing of special objects
1582 * (like structs). SCM_PRINTER_APPLY applies PROC to EXP and a smob
1583 * containing PORT and PSTATE. This object can be used as the port for
1584 * display/write etc to continue the current print chain. The REVEALED
1585 * field of PSTATE is set to true to indicate that the print state has
1586 * escaped to Scheme and thus has to be freed by the GC.
1589 scm_t_bits scm_tc16_port_with_ps
;
1591 /* Print exactly as the port itself would */
1594 port_with_ps_print (SCM obj
, SCM port
, scm_print_state
*pstate
)
1596 obj
= SCM_PORT_WITH_PS_PORT (obj
);
1597 return scm_ptobs
[SCM_PTOBNUM (obj
)].print (obj
, port
, pstate
);
1601 scm_printer_apply (SCM proc
, SCM exp
, SCM port
, scm_print_state
*pstate
)
1603 pstate
->revealed
= 1;
1604 return scm_call_2 (proc
, exp
,
1605 scm_i_port_with_print_state (port
, pstate
->handle
));
1608 SCM_DEFINE (scm_port_with_print_state
, "port-with-print-state", 1, 1, 0,
1609 (SCM port
, SCM pstate
),
1610 "Create a new port which behaves like @var{port}, but with an\n"
1611 "included print state @var{pstate}. @var{pstate} is optional.\n"
1612 "If @var{pstate} isn't supplied and @var{port} already has\n"
1613 "a print state, the old print state is reused.")
1614 #define FUNC_NAME s_scm_port_with_print_state
1616 SCM_VALIDATE_OPORT_VALUE (1, port
);
1617 if (!SCM_UNBNDP (pstate
))
1618 SCM_VALIDATE_PRINTSTATE (2, pstate
);
1619 return scm_i_port_with_print_state (port
, pstate
);
1623 SCM_DEFINE (scm_get_print_state
, "get-print-state", 1, 0, 0,
1625 "Return the print state of the port @var{port}. If @var{port}\n"
1626 "has no associated print state, @code{#f} is returned.")
1627 #define FUNC_NAME s_scm_get_print_state
1629 if (SCM_PORT_WITH_PS_P (port
))
1630 return SCM_PORT_WITH_PS_PS (port
);
1631 if (SCM_OUTPUT_PORT_P (port
))
1633 SCM_WRONG_TYPE_ARG (1, port
);
1644 scm_gc_register_root (&print_state_pool
);
1645 scm_gc_register_root (&scm_print_state_vtable
);
1646 type
= scm_make_vtable (scm_from_locale_string (SCM_PRINT_STATE_LAYOUT
),
1648 scm_set_struct_vtable_name_x (type
, scm_from_latin1_symbol ("print-state"));
1649 scm_print_state_vtable
= type
;
1651 /* Don't want to bind a wrapper class in GOOPS, so pass 0 as arg1. */
1652 scm_tc16_port_with_ps
= scm_make_smob_type (0, 0);
1653 scm_set_smob_print (scm_tc16_port_with_ps
, port_with_ps_print
);
1655 #include "libguile/print.x"
1657 scm_init_opts (scm_print_options
, scm_print_opts
);
1658 scm_print_opts
[SCM_PRINT_HIGHLIGHT_PREFIX_I
].val
=
1659 SCM_UNPACK (scm_from_locale_string ("{"));
1660 scm_print_opts
[SCM_PRINT_HIGHLIGHT_SUFFIX_I
].val
=
1661 SCM_UNPACK (scm_from_locale_string ("}"));
1662 scm_print_opts
[SCM_PRINT_KEYWORD_STYLE_I
].val
= SCM_UNPACK (sym_reader
);