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
,
469 | UC_CATEGORY_MASK_S
)
472 if (!display_character (c
, port
, strategy
))
473 scm_encoding_error ("print_r7rs_extended_symbol", errno
,
474 "cannot convert to output locale",
475 port
, SCM_MAKE_CHAR (c
));
479 scm_lfwrite ("\\x", 2, port
);
480 scm_intprint (c
, 16, port
);
481 scm_putc (';', port
);
487 scm_putc ('|', port
);
490 /* FIXME: allow R6RS hex escapes instead of #{...}# or |...|. */
492 scm_i_print_symbol_name (SCM sym
, SCM port
)
494 if (!symbol_has_extended_read_syntax (sym
))
495 print_normal_symbol (sym
, port
);
496 else if (SCM_PRINT_R7RS_SYMBOLS_P
)
497 print_r7rs_extended_symbol (sym
, port
);
499 print_extended_symbol (sym
, port
);
503 scm_print_symbol_name (const char *str
, size_t len
, SCM port
)
505 SCM symbol
= scm_from_locale_symboln (str
, len
);
506 scm_i_print_symbol_name (symbol
, port
);
509 /* Print generally. Handles both write and display according to PSTATE.
511 SCM_GPROC(s_write
, "write", 1, 1, 0, scm_write
, g_write
);
512 SCM_GPROC(s_display
, "display", 1, 1, 0, scm_display
, g_display
);
514 static void iprin1 (SCM exp
, SCM port
, scm_print_state
*pstate
);
517 /* Print a character as an octal or hex escape. */
518 #define PRINT_CHAR_ESCAPE(i, port) \
521 if (!SCM_R6RS_ESCAPES_P) \
522 scm_intprint (i, 8, port); \
525 scm_puts ("x", port); \
526 scm_intprint (i, 16, port); \
533 scm_iprin1 (SCM exp
, SCM port
, scm_print_state
*pstate
)
536 && scm_is_true (scm_memq (exp
, pstate
->highlight_objects
)))
538 scm_display (SCM_PRINT_HIGHLIGHT_PREFIX
, port
);
539 iprin1 (exp
, port
, pstate
);
540 scm_display (SCM_PRINT_HIGHLIGHT_SUFFIX
, port
);
543 iprin1 (exp
, port
, pstate
);
547 iprin1 (SCM exp
, SCM port
, scm_print_state
*pstate
)
549 switch (SCM_ITAG3 (exp
))
553 /* These tc3 tags should never occur in an immediate value. They are
554 * only used in cell types of non-immediates, i. e. the value returned
555 * by SCM_CELL_TYPE (exp) can use these tags.
557 scm_ipruk ("immediate", exp
, port
);
561 scm_intprint (SCM_I_INUM (exp
), 10, port
);
566 if (SCM_WRITINGP (pstate
))
567 write_character (SCM_CHAR (exp
), port
, 0);
570 if (!display_character (SCM_CHAR (exp
), port
,
571 PORT_CONVERSION_HANDLER (port
)))
572 scm_encoding_error (__func__
, errno
,
573 "cannot convert to output locale",
577 else if (SCM_IFLAGP (exp
)
578 && ((size_t) SCM_IFLAGNUM (exp
) < (sizeof iflagnames
/ sizeof (char *))))
580 scm_puts (iflagnames
[SCM_IFLAGNUM (exp
)], port
);
584 /* unknown immediate value */
585 scm_ipruk ("immediate", exp
, port
);
589 switch (SCM_TYP7 (exp
))
593 ENTER_NESTED_DATA (pstate
, exp
, circref
);
594 if (SCM_OBJ_CLASS_FLAGS (exp
) & SCM_CLASSF_GOOPS
)
596 SCM pwps
, print
= pstate
->writingp
? g_write
: g_display
;
597 if (SCM_UNPACK (print
) == 0)
599 pwps
= scm_i_port_with_print_state (port
, pstate
->handle
);
600 pstate
->revealed
= 1;
601 scm_call_generic_2 (print
, exp
, pwps
);
606 scm_print_struct (exp
, port
, pstate
);
608 EXIT_NESTED_DATA (pstate
);
611 case scm_tcs_cons_imcar
:
612 case scm_tcs_cons_nimcar
:
613 ENTER_NESTED_DATA (pstate
, exp
, circref
);
614 scm_iprlist ("(", exp
, ')', port
, pstate
);
615 EXIT_NESTED_DATA (pstate
);
618 print_circref (port
, pstate
, exp
);
621 switch SCM_TYP16 (exp
) {
623 scm_bigprint (exp
, port
, pstate
);
626 scm_print_real (exp
, port
, pstate
);
628 case scm_tc16_complex
:
629 scm_print_complex (exp
, port
, pstate
);
631 case scm_tc16_fraction
:
632 scm_i_print_fraction (exp
, port
, pstate
);
637 if (SCM_WRITINGP (pstate
))
641 display_character ('"', port
, iconveh_question_mark
);
642 len
= scm_i_string_length (exp
);
643 for (i
= 0; i
< len
; ++i
)
644 write_character (scm_i_string_ref (exp
, i
), port
, 1);
646 display_character ('"', port
, iconveh_question_mark
);
647 scm_remember_upto_here_1 (exp
);
653 len
= scm_i_string_length (exp
);
654 printed
= display_string (scm_i_string_data (exp
),
655 scm_i_is_narrow_string (exp
),
657 PORT_CONVERSION_HANDLER (port
));
658 if (SCM_UNLIKELY (printed
< len
))
659 scm_encoding_error (__func__
, errno
,
660 "cannot convert to output locale",
661 port
, scm_c_string_ref (exp
, printed
));
664 scm_remember_upto_here_1 (exp
);
667 if (scm_i_symbol_is_interned (exp
))
669 scm_i_print_symbol_name (exp
, port
);
670 scm_remember_upto_here_1 (exp
);
674 scm_puts ("#<uninterned-symbol ", port
);
675 scm_i_print_symbol_name (exp
, port
);
676 scm_putc (' ', port
);
677 scm_uintprint (SCM_UNPACK (exp
), 16, port
);
678 scm_putc ('>', port
);
681 case scm_tc7_variable
:
682 scm_i_variable_print (exp
, port
, pstate
);
684 case scm_tc7_program
:
685 scm_i_program_print (exp
, port
, pstate
);
687 case scm_tc7_pointer
:
688 scm_i_pointer_print (exp
, port
, pstate
);
690 case scm_tc7_hashtable
:
691 scm_i_hashtable_print (exp
, port
, pstate
);
694 scm_i_fluid_print (exp
, port
, pstate
);
696 case scm_tc7_dynamic_state
:
697 scm_i_dynamic_state_print (exp
, port
, pstate
);
700 scm_i_frame_print (exp
, port
, pstate
);
702 case scm_tc7_objcode
:
703 scm_i_objcode_print (exp
, port
, pstate
);
706 scm_i_vm_print (exp
, port
, pstate
);
708 case scm_tc7_vm_cont
:
709 scm_i_vm_cont_print (exp
, port
, pstate
);
712 scm_i_prompt_print (exp
, port
, pstate
);
714 case scm_tc7_with_fluids
:
715 scm_i_with_fluids_print (exp
, port
, pstate
);
718 ENTER_NESTED_DATA (pstate
, exp
, circref
);
719 scm_i_print_array (exp
, port
, pstate
);
720 EXIT_NESTED_DATA (pstate
);
722 case scm_tc7_bytevector
:
723 scm_i_print_bytevector (exp
, port
, pstate
);
725 case scm_tc7_bitvector
:
726 scm_i_print_bitvector (exp
, port
, pstate
);
729 ENTER_NESTED_DATA (pstate
, exp
, circref
);
730 if (SCM_IS_WHVEC (exp
))
731 scm_puts ("#wh(", port
);
733 scm_puts ("#w(", port
);
734 goto common_vector_printer
;
736 ENTER_NESTED_DATA (pstate
, exp
, circref
);
737 scm_puts ("#(", port
);
738 common_vector_printer
:
741 long last
= SCM_SIMPLE_VECTOR_LENGTH (exp
) - 1;
744 && SCM_SIMPLE_VECTOR_LENGTH (exp
) > pstate
->length
)
746 last
= pstate
->length
- 1;
749 if (SCM_I_WVECTP (exp
))
751 /* Elements of weak vectors may not be accessed via the
752 `SIMPLE_VECTOR_REF ()' macro. */
753 for (i
= 0; i
< last
; ++i
)
755 scm_iprin1 (scm_c_vector_ref (exp
, i
),
757 scm_putc (' ', port
);
762 for (i
= 0; i
< last
; ++i
)
764 scm_iprin1 (SCM_SIMPLE_VECTOR_REF (exp
, i
), port
, pstate
);
765 scm_putc (' ', port
);
772 scm_iprin1 (scm_c_vector_ref (exp
, i
), port
, pstate
);
775 scm_puts (" ...", port
);
776 scm_putc (')', port
);
778 EXIT_NESTED_DATA (pstate
);
782 register long i
= SCM_PTOBNUM (exp
);
784 && scm_ptobs
[i
].print
785 && (scm_ptobs
[i
].print
) (exp
, port
, pstate
))
790 ENTER_NESTED_DATA (pstate
, exp
, circref
);
791 SCM_SMOB_DESCRIPTOR (exp
).print (exp
, port
, pstate
);
792 EXIT_NESTED_DATA (pstate
);
795 /* case scm_tcs_closures: */
797 scm_ipruk ("type", exp
, port
);
802 /* Print states are necessary for circular reference safe printing.
803 * They are also expensive to allocate. Therefore print states are
804 * kept in a pool so that they can be reused.
807 /* The PORT argument can also be a print-state/port pair, which will
808 * then be used instead of allocating a new print state. This is
809 * useful for continuing a chain of print calls from Scheme. */
812 scm_prin1 (SCM exp
, SCM port
, int writingp
)
814 SCM handle
= SCM_BOOL_F
; /* Will GC protect the handle whilst unlinked */
816 scm_print_state
*pstate
;
819 /* If PORT is a print-state/port pair, use that. Else create a new
822 if (SCM_PORT_WITH_PS_P (port
))
824 pstate_scm
= SCM_PORT_WITH_PS_PS (port
);
825 port
= SCM_PORT_WITH_PS_PORT (port
);
829 /* First try to allocate a print state from the pool */
830 scm_i_pthread_mutex_lock (&print_state_mutex
);
831 if (!scm_is_null (print_state_pool
))
833 handle
= print_state_pool
;
834 print_state_pool
= SCM_CDR (print_state_pool
);
836 scm_i_pthread_mutex_unlock (&print_state_mutex
);
837 if (scm_is_false (handle
))
838 handle
= scm_list_1 (make_print_state ());
839 pstate_scm
= SCM_CAR (handle
);
842 pstate
= SCM_PRINT_STATE (pstate_scm
);
843 old_writingp
= pstate
->writingp
;
844 pstate
->writingp
= writingp
;
845 scm_iprin1 (exp
, port
, pstate
);
846 pstate
->writingp
= old_writingp
;
848 /* Return print state to pool if it has been created above and
849 hasn't escaped to Scheme. */
851 if (scm_is_true (handle
) && !pstate
->revealed
)
853 scm_i_pthread_mutex_lock (&print_state_mutex
);
854 SCM_SETCDR (handle
, print_state_pool
);
855 print_state_pool
= handle
;
856 scm_i_pthread_mutex_unlock (&print_state_mutex
);
860 /* Convert codepoint CH to UTF-8 and store the result in UTF8. Return
861 the number of bytes of the UTF-8-encoded string. */
863 codepoint_to_utf8 (scm_t_wchar ch
, scm_t_uint8 utf8
[4])
866 scm_t_uint32 codepoint
;
868 codepoint
= (scm_t_uint32
) ch
;
870 if (codepoint
<= 0x7f)
873 utf8
[0] = (scm_t_uint8
) codepoint
;
875 else if (codepoint
<= 0x7ffUL
)
878 utf8
[0] = 0xc0 | (codepoint
>> 6);
879 utf8
[1] = 0x80 | (codepoint
& 0x3f);
881 else if (codepoint
<= 0xffffUL
)
884 utf8
[0] = 0xe0 | (codepoint
>> 12);
885 utf8
[1] = 0x80 | ((codepoint
>> 6) & 0x3f);
886 utf8
[2] = 0x80 | (codepoint
& 0x3f);
891 utf8
[0] = 0xf0 | (codepoint
>> 18);
892 utf8
[1] = 0x80 | ((codepoint
>> 12) & 0x3f);
893 utf8
[2] = 0x80 | ((codepoint
>> 6) & 0x3f);
894 utf8
[3] = 0x80 | (codepoint
& 0x3f);
900 #define STR_REF(s, x) \
902 ? (scm_t_wchar) ((unsigned char *) (s))[x] \
903 : ((scm_t_wchar *) (s))[x])
905 /* Write STR to PORT as UTF-8. STR is a LEN-codepoint string; it is
906 narrow if NARROW_P is true, wide otherwise. Return LEN. */
908 display_string_as_utf8 (const void *str
, int narrow_p
, size_t len
,
913 while (len
> printed
)
916 char *input
, utf8_buf
[256];
918 /* Convert STR to UTF-8. */
919 for (i
= printed
, utf8_len
= 0, input
= utf8_buf
;
920 i
< len
&& utf8_len
+ 4 < sizeof (utf8_buf
);
923 utf8_len
+= codepoint_to_utf8 (STR_REF (str
, i
),
924 (scm_t_uint8
*) input
);
925 input
= utf8_buf
+ utf8_len
;
928 /* INPUT was successfully converted, entirely; print the
930 scm_lfwrite (utf8_buf
, utf8_len
, port
);
931 printed
+= i
- printed
;
934 assert (printed
== len
);
939 /* Convert STR through PORT's output conversion descriptor and write the
940 output to PORT. Return the number of codepoints written. */
942 display_string_using_iconv (const void *str
, int narrow_p
, size_t len
,
944 scm_t_string_failed_conversion_handler strategy
)
947 scm_t_iconv_descriptors
*id
;
948 scm_t_port_internal
*pti
= SCM_PORT_GET_INTERNAL (port
);
950 id
= scm_i_port_iconv_descriptors (port
, SCM_PORT_WRITE
);
952 if (SCM_UNLIKELY (pti
->at_stream_start_for_bom_write
&& len
> 0))
954 scm_t_port
*pt
= SCM_PTAB_ENTRY (port
);
956 /* Record that we're no longer at stream start. */
957 pti
->at_stream_start_for_bom_write
= 0;
959 pti
->at_stream_start_for_bom_read
= 0;
961 /* Write a BOM if appropriate. */
962 if (SCM_UNLIKELY (c_strcasecmp(pt
->encoding
, "UTF-16") == 0
963 || c_strcasecmp(pt
->encoding
, "UTF-32") == 0))
964 display_character (SCM_UNICODE_BOM
, port
, iconveh_error
);
969 while (len
> printed
)
971 size_t done
, utf8_len
, input_left
, output_left
, i
;
972 size_t codepoints_read
, output_len
;
973 char *input
, *output
;
974 char utf8_buf
[256], encoded_output
[256];
977 /* Convert STR to UTF-8. */
978 for (i
= printed
, utf8_len
= 0, input
= utf8_buf
;
979 i
< len
&& utf8_len
+ 4 < sizeof (utf8_buf
);
982 offsets
[utf8_len
] = i
;
983 utf8_len
+= codepoint_to_utf8 (STR_REF (str
, i
),
984 (scm_t_uint8
*) input
);
985 input
= utf8_buf
+ utf8_len
;
989 input_left
= utf8_len
;
991 output
= encoded_output
;
992 output_left
= sizeof (encoded_output
);
994 done
= iconv (id
->output_cd
, &input
, &input_left
,
995 &output
, &output_left
);
997 output_len
= sizeof (encoded_output
) - output_left
;
999 if (SCM_UNLIKELY (done
== (size_t) -1))
1001 int errno_save
= errno
;
1003 /* Reset the `iconv' state. */
1004 iconv (id
->output_cd
, NULL
, NULL
, NULL
, NULL
);
1006 /* Print the OUTPUT_LEN bytes successfully converted. */
1007 scm_lfwrite (encoded_output
, output_len
, port
);
1009 /* See how many input codepoints these OUTPUT_LEN bytes
1011 codepoints_read
= offsets
[input
- utf8_buf
] - printed
;
1012 printed
+= codepoints_read
;
1014 if (errno_save
== EILSEQ
&&
1015 strategy
!= SCM_FAILED_CONVERSION_ERROR
)
1017 /* Conversion failed somewhere in INPUT and we want to
1018 escape or substitute the offending input character. */
1020 if (strategy
== SCM_FAILED_CONVERSION_ESCAPE_SEQUENCE
)
1024 /* Find CH, the offending codepoint, and escape it. */
1025 ch
= STR_REF (str
, offsets
[input
- utf8_buf
]);
1026 write_character_escaped (ch
, 1, port
);
1029 /* STRATEGY is `SCM_FAILED_CONVERSION_QUESTION_MARK'. */
1030 display_string ("?", 1, 1, port
, strategy
);
1035 /* Something bad happened that we can't handle: bail out. */
1040 /* INPUT was successfully converted, entirely; print the
1042 scm_lfwrite (encoded_output
, output_len
, port
);
1043 codepoints_read
= i
- printed
;
1044 printed
+= codepoints_read
;
1053 /* Display the LEN codepoints in STR to PORT according to STRATEGY;
1054 return the number of codepoints successfully displayed. If NARROW_P,
1055 then STR is interpreted as a sequence of `char', denoting a Latin-1
1056 string; otherwise it's interpreted as a sequence of
1059 display_string (const void *str
, int narrow_p
,
1060 size_t len
, SCM port
,
1061 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
);
1071 return display_string_using_iconv (str
, narrow_p
, len
,
1075 /* Attempt to display CH to PORT according to STRATEGY. Return non-zero
1076 if CH was successfully displayed, zero otherwise (e.g., if it was not
1077 representable in PORT's encoding.) */
1079 display_character (scm_t_wchar ch
, SCM port
,
1080 scm_t_string_failed_conversion_handler strategy
)
1082 return display_string (&ch
, 0, 1, port
, strategy
) == 1;
1085 /* Attempt to pretty-print CH, a combining character, to PORT. Return
1086 zero upon failure, non-zero otherwise. The idea is to print CH above
1087 a dotted circle to make it more visible. */
1089 write_combining_character (scm_t_wchar ch
, SCM port
)
1093 str
[0] = SCM_CODEPOINT_DOTTED_CIRCLE
;
1096 return display_string (str
, 0, 2, port
, iconveh_error
) == 2;
1099 /* Write CH to PORT in its escaped form, using the string escape syntax
1100 if STRING_ESCAPES_P is non-zero. */
1102 write_character_escaped (scm_t_wchar ch
, int string_escapes_p
, SCM port
)
1104 if (string_escapes_p
)
1106 /* Represent CH using the in-string escape syntax. */
1108 static const char hex
[] = "0123456789abcdef";
1109 static const char escapes
[7] = "abtnvfr";
1112 if (ch
>= 0x07 && ch
<= 0x0D && ch
!= 0x0A)
1114 /* Use special escapes for some C0 controls. */
1116 buf
[1] = escapes
[ch
- 0x07];
1117 scm_lfwrite (buf
, 2, port
);
1119 else if (!SCM_R6RS_ESCAPES_P
)
1125 buf
[2] = hex
[ch
/ 16];
1126 buf
[3] = hex
[ch
% 16];
1127 scm_lfwrite (buf
, 4, port
);
1129 else if (ch
<= 0xFFFF)
1133 buf
[2] = hex
[(ch
& 0xF000) >> 12];
1134 buf
[3] = hex
[(ch
& 0xF00) >> 8];
1135 buf
[4] = hex
[(ch
& 0xF0) >> 4];
1136 buf
[5] = hex
[(ch
& 0xF)];
1137 scm_lfwrite (buf
, 6, port
);
1139 else if (ch
> 0xFFFF)
1143 buf
[2] = hex
[(ch
& 0xF00000) >> 20];
1144 buf
[3] = hex
[(ch
& 0xF0000) >> 16];
1145 buf
[4] = hex
[(ch
& 0xF000) >> 12];
1146 buf
[5] = hex
[(ch
& 0xF00) >> 8];
1147 buf
[6] = hex
[(ch
& 0xF0) >> 4];
1148 buf
[7] = hex
[(ch
& 0xF)];
1149 scm_lfwrite (buf
, 8, port
);
1154 /* Print an R6RS variable-length hex escape: "\xNNNN;". */
1155 scm_t_wchar ch2
= ch
;
1165 buf
[i
] = hex
[ch2
& 0xF];
1172 scm_lfwrite (buf
+ i
, 9 - i
, port
);
1177 /* Represent CH using the character escape syntax. */
1180 name
= scm_i_charname (SCM_MAKE_CHAR (ch
));
1182 scm_puts (name
, port
);
1184 PRINT_CHAR_ESCAPE (ch
, port
);
1188 /* Write CH to PORT, escaping it if it's non-graphic or not
1189 representable in PORT's encoding. If STRING_ESCAPES_P is true and CH
1190 needs to be escaped, it is escaped using the in-string escape syntax;
1191 otherwise the character escape syntax is used. */
1193 write_character (scm_t_wchar ch
, SCM port
, int string_escapes_p
)
1196 scm_t_string_failed_conversion_handler strategy
;
1198 strategy
= PORT_CONVERSION_HANDLER (port
);
1200 if (string_escapes_p
)
1202 /* Check if CH deserves special treatment. */
1203 if (ch
== '"' || ch
== '\\')
1205 display_character ('\\', port
, iconveh_question_mark
);
1206 display_character (ch
, port
, strategy
);
1209 else if (ch
== '\n' && SCM_PRINT_ESCAPE_NEWLINES_P
)
1211 display_character ('\\', port
, iconveh_question_mark
);
1212 display_character ('n', port
, strategy
);
1215 else if (ch
== ' ' || ch
== '\n')
1217 display_character (ch
, port
, strategy
);
1223 display_string ("#\\", 1, 2, port
, iconveh_question_mark
);
1225 if (uc_combining_class (ch
) != UC_CCC_NR
)
1226 /* Character is a combining character, so attempt to
1228 printed
= write_combining_character (ch
, port
);
1232 && uc_is_general_category_withtable (ch
,
1233 UC_CATEGORY_MASK_L
|
1234 UC_CATEGORY_MASK_M
|
1235 UC_CATEGORY_MASK_N
|
1236 UC_CATEGORY_MASK_P
|
1237 UC_CATEGORY_MASK_S
))
1238 /* CH is graphic; attempt to display it. */
1239 printed
= display_character (ch
, port
, iconveh_error
);
1242 /* CH isn't graphic or cannot be represented in PORT's encoding. */
1243 write_character_escaped (ch
, string_escapes_p
, port
);
1246 /* Display STR to PORT from START inclusive to END exclusive. */
1248 scm_i_display_substring (SCM str
, size_t start
, size_t end
, SCM port
)
1252 size_t len
, printed
;
1254 buf
= scm_i_string_data (str
);
1256 narrow_p
= scm_i_is_narrow_string (str
);
1257 buf
+= start
* (narrow_p
? sizeof (char) : sizeof (scm_t_wchar
));
1259 printed
= display_string (buf
, narrow_p
, end
- start
, port
,
1260 PORT_CONVERSION_HANDLER (port
));
1262 if (SCM_UNLIKELY (printed
< len
))
1263 scm_encoding_error (__func__
, errno
,
1264 "cannot convert to output locale",
1265 port
, scm_c_string_ref (str
, printed
+ start
));
1269 /* Print an integer.
1273 scm_intprint (scm_t_intmax n
, int radix
, SCM port
)
1275 char num_buf
[SCM_INTBUFLEN
];
1276 scm_lfwrite (num_buf
, scm_iint2str (n
, radix
, num_buf
), port
);
1280 scm_uintprint (scm_t_uintmax n
, int radix
, SCM port
)
1282 char num_buf
[SCM_INTBUFLEN
];
1283 scm_lfwrite (num_buf
, scm_iuint2str (n
, radix
, num_buf
), port
);
1286 /* Print an object of unrecognized type.
1290 scm_ipruk (char *hdr
, SCM ptr
, SCM port
)
1292 scm_puts ("#<unknown-", port
);
1293 scm_puts (hdr
, port
);
1294 if (1) /* (scm_in_heap_p (ptr)) */ /* FIXME */
1296 scm_puts (" (0x", port
);
1297 scm_uintprint (SCM_CELL_WORD_0 (ptr
), 16, port
);
1298 scm_puts (" . 0x", port
);
1299 scm_uintprint (SCM_CELL_WORD_1 (ptr
), 16, port
);
1300 scm_puts (") @", port
);
1302 scm_puts (" 0x", port
);
1303 scm_uintprint (SCM_UNPACK (ptr
), 16, port
);
1304 scm_putc ('>', port
);
1311 scm_iprlist (char *hdr
, SCM exp
, int tlr
, SCM port
, scm_print_state
*pstate
)
1313 register SCM hare
, tortoise
;
1314 long floor
= pstate
->top
- 2;
1315 scm_puts (hdr
, port
);
1318 goto fancy_printing
;
1320 /* Run a hare and tortoise so that total time complexity will be
1321 O(depth * N) instead of O(N^2). */
1322 hare
= SCM_CDR (exp
);
1324 while (scm_is_pair (hare
))
1326 if (scm_is_eq (hare
, tortoise
))
1327 goto fancy_printing
;
1328 hare
= SCM_CDR (hare
);
1329 if (!scm_is_pair (hare
))
1331 hare
= SCM_CDR (hare
);
1332 tortoise
= SCM_CDR (tortoise
);
1335 /* No cdr cycles intrinsic to this list */
1336 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
1337 for (exp
= SCM_CDR (exp
); scm_is_pair (exp
); exp
= SCM_CDR (exp
))
1341 for (i
= floor
; i
>= 0; --i
)
1342 if (scm_is_eq (PSTATE_STACK_REF(pstate
, i
), exp
))
1344 PUSH_REF (pstate
, exp
);
1345 scm_putc (' ', port
);
1347 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
1349 if (!SCM_NULL_OR_NIL_P (exp
))
1351 scm_puts (" . ", port
);
1352 scm_iprin1 (exp
, port
, pstate
);
1356 scm_putc (tlr
, port
);
1357 pstate
->top
= floor
+ 2;
1362 long n
= pstate
->length
;
1364 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
1365 exp
= SCM_CDR (exp
); --n
;
1366 for (; scm_is_pair (exp
); exp
= SCM_CDR (exp
))
1368 register unsigned long i
;
1370 for (i
= 0; i
< pstate
->top
; ++i
)
1371 if (scm_is_eq (PSTATE_STACK_REF(pstate
, i
), exp
))
1377 scm_puts (" ...", port
);
1383 PUSH_REF(pstate
, exp
);
1384 ++pstate
->list_offset
;
1385 scm_putc (' ', port
);
1387 scm_iprin1 (SCM_CAR (exp
), port
, pstate
);
1390 if (!SCM_NULL_OR_NIL_P (exp
))
1392 scm_puts (" . ", port
);
1393 scm_iprin1 (exp
, port
, pstate
);
1396 pstate
->list_offset
-= pstate
->top
- floor
- 2;
1400 pstate
->list_offset
-= pstate
->top
- floor
- 2;
1403 scm_puts (" . ", port
);
1404 print_circref (port
, pstate
, exp
);
1411 scm_valid_oport_value_p (SCM val
)
1413 return (SCM_OPOUTPORTP (val
)
1414 || (SCM_PORT_WITH_PS_P (val
)
1415 && SCM_OPOUTPORTP (SCM_PORT_WITH_PS_PORT (val
))));
1418 /* SCM_GPROC(s_write, "write", 1, 1, 0, scm_write, g_write); */
1421 scm_write (SCM obj
, SCM port
)
1423 if (SCM_UNBNDP (port
))
1424 port
= scm_current_output_port ();
1426 SCM_ASSERT (scm_valid_oport_value_p (port
), port
, SCM_ARG2
, s_write
);
1428 scm_prin1 (obj
, port
, 1);
1429 return SCM_UNSPECIFIED
;
1433 /* SCM_GPROC(s_display, "display", 1, 1, 0, scm_display, g_display); */
1436 scm_display (SCM obj
, SCM port
)
1438 if (SCM_UNBNDP (port
))
1439 port
= scm_current_output_port ();
1441 SCM_ASSERT (scm_valid_oport_value_p (port
), port
, SCM_ARG2
, s_display
);
1443 scm_prin1 (obj
, port
, 0);
1444 return SCM_UNSPECIFIED
;
1448 SCM_DEFINE (scm_simple_format
, "simple-format", 2, 0, 1,
1449 (SCM destination
, SCM message
, SCM args
),
1450 "Write @var{message} to @var{destination}, defaulting to\n"
1451 "the current output port.\n"
1452 "@var{message} can contain @code{~A} (was @code{%s}) and\n"
1453 "@code{~S} (was @code{%S}) escapes. When printed,\n"
1454 "the escapes are replaced with corresponding members of\n"
1456 "@code{~A} formats using @code{display} and @code{~S} formats\n"
1457 "using @code{write}.\n"
1458 "If @var{destination} is @code{#t}, then use the current output\n"
1459 "port, if @var{destination} is @code{#f}, then return a string\n"
1460 "containing the formatted text. Does not add a trailing newline.")
1461 #define FUNC_NAME s_scm_simple_format
1463 SCM port
, answer
= SCM_UNSPECIFIED
;
1464 int fReturnString
= 0;
1466 size_t start
, p
, end
;
1468 if (scm_is_eq (destination
, SCM_BOOL_T
))
1470 destination
= port
= scm_current_output_port ();
1472 else if (scm_is_false (destination
))
1475 port
= scm_mkstrport (SCM_INUM0
, SCM_BOOL_F
,
1476 SCM_OPN
| SCM_WRTNG
,
1482 SCM_VALIDATE_OPORT_VALUE (1, destination
);
1483 port
= SCM_COERCE_OUTPORT (destination
);
1485 SCM_VALIDATE_STRING (2, message
);
1486 SCM_VALIDATE_REST_ARGUMENT (args
);
1490 end
= scm_i_string_length (message
);
1491 for (p
= start
; p
!= end
; ++p
)
1492 if (scm_i_string_ref (message
, p
) == '~')
1497 switch (scm_i_string_ref (message
, p
))
1506 scm_lfwrite_substr (message
, start
, p
, port
);
1510 scm_lfwrite_substr (message
, start
, p
- 1, port
);
1515 SCM_MISC_ERROR ("FORMAT: Unsupported format option ~~~A - use (ice-9 format) instead",
1516 scm_list_1 (SCM_MAKE_CHAR (scm_i_string_ref (message
, p
))));
1521 if (!scm_is_pair (args
))
1522 SCM_MISC_ERROR ("FORMAT: Missing argument for ~~~A",
1523 scm_list_1 (SCM_MAKE_CHAR (scm_i_string_ref (message
, p
))));
1525 scm_lfwrite_substr (message
, start
, p
- 1, port
);
1526 /* we pass destination here */
1527 scm_prin1 (SCM_CAR (args
), destination
, writingp
);
1528 args
= SCM_CDR (args
);
1532 scm_lfwrite_substr (message
, start
, p
, port
);
1533 if (!scm_is_eq (args
, SCM_EOL
))
1534 SCM_MISC_ERROR ("FORMAT: ~A superfluous arguments",
1535 scm_list_1 (scm_length (args
)));
1538 answer
= scm_strport_to_string (destination
);
1540 return scm_return_first (answer
, message
);
1545 SCM_DEFINE (scm_newline
, "newline", 0, 1, 0,
1547 "Send a newline to @var{port}.\n"
1548 "If @var{port} is omitted, send to the current output port.")
1549 #define FUNC_NAME s_scm_newline
1551 if (SCM_UNBNDP (port
))
1552 port
= scm_current_output_port ();
1554 SCM_VALIDATE_OPORT_VALUE (1, port
);
1556 scm_putc ('\n', SCM_COERCE_OUTPORT (port
));
1557 return SCM_UNSPECIFIED
;
1561 SCM_DEFINE (scm_write_char
, "write-char", 1, 1, 0,
1562 (SCM chr
, SCM port
),
1563 "Send character @var{chr} to @var{port}.")
1564 #define FUNC_NAME s_scm_write_char
1566 if (SCM_UNBNDP (port
))
1567 port
= scm_current_output_port ();
1569 SCM_VALIDATE_CHAR (1, chr
);
1570 SCM_VALIDATE_OPORT_VALUE (2, port
);
1572 port
= SCM_COERCE_OUTPORT (port
);
1573 if (!display_character (SCM_CHAR (chr
), port
,
1574 PORT_CONVERSION_HANDLER (port
)))
1575 scm_encoding_error (__func__
, errno
,
1576 "cannot convert to output locale",
1579 return SCM_UNSPECIFIED
;
1585 /* Call back to Scheme code to do the printing of special objects
1586 * (like structs). SCM_PRINTER_APPLY applies PROC to EXP and a smob
1587 * containing PORT and PSTATE. This object can be used as the port for
1588 * display/write etc to continue the current print chain. The REVEALED
1589 * field of PSTATE is set to true to indicate that the print state has
1590 * escaped to Scheme and thus has to be freed by the GC.
1593 scm_t_bits scm_tc16_port_with_ps
;
1595 /* Print exactly as the port itself would */
1598 port_with_ps_print (SCM obj
, SCM port
, scm_print_state
*pstate
)
1600 obj
= SCM_PORT_WITH_PS_PORT (obj
);
1601 return scm_ptobs
[SCM_PTOBNUM (obj
)].print (obj
, port
, pstate
);
1605 scm_printer_apply (SCM proc
, SCM exp
, SCM port
, scm_print_state
*pstate
)
1607 pstate
->revealed
= 1;
1608 return scm_call_2 (proc
, exp
,
1609 scm_i_port_with_print_state (port
, pstate
->handle
));
1612 SCM_DEFINE (scm_port_with_print_state
, "port-with-print-state", 1, 1, 0,
1613 (SCM port
, SCM pstate
),
1614 "Create a new port which behaves like @var{port}, but with an\n"
1615 "included print state @var{pstate}. @var{pstate} is optional.\n"
1616 "If @var{pstate} isn't supplied and @var{port} already has\n"
1617 "a print state, the old print state is reused.")
1618 #define FUNC_NAME s_scm_port_with_print_state
1620 SCM_VALIDATE_OPORT_VALUE (1, port
);
1621 if (!SCM_UNBNDP (pstate
))
1622 SCM_VALIDATE_PRINTSTATE (2, pstate
);
1623 return scm_i_port_with_print_state (port
, pstate
);
1627 SCM_DEFINE (scm_get_print_state
, "get-print-state", 1, 0, 0,
1629 "Return the print state of the port @var{port}. If @var{port}\n"
1630 "has no associated print state, @code{#f} is returned.")
1631 #define FUNC_NAME s_scm_get_print_state
1633 if (SCM_PORT_WITH_PS_P (port
))
1634 return SCM_PORT_WITH_PS_PS (port
);
1635 if (SCM_OUTPUT_PORT_P (port
))
1637 SCM_WRONG_TYPE_ARG (1, port
);
1648 scm_gc_register_root (&print_state_pool
);
1649 scm_gc_register_root (&scm_print_state_vtable
);
1650 type
= scm_make_vtable (scm_from_locale_string (SCM_PRINT_STATE_LAYOUT
),
1652 scm_set_struct_vtable_name_x (type
, scm_from_latin1_symbol ("print-state"));
1653 scm_print_state_vtable
= type
;
1655 /* Don't want to bind a wrapper class in GOOPS, so pass 0 as arg1. */
1656 scm_tc16_port_with_ps
= scm_make_smob_type (0, 0);
1657 scm_set_smob_print (scm_tc16_port_with_ps
, port_with_ps_print
);
1659 #include "libguile/print.x"
1661 scm_init_opts (scm_print_options
, scm_print_opts
);
1662 scm_print_opts
[SCM_PRINT_HIGHLIGHT_PREFIX_I
].val
=
1663 SCM_UNPACK (scm_from_locale_string ("{"));
1664 scm_print_opts
[SCM_PRINT_HIGHLIGHT_SUFFIX_I
].val
=
1665 SCM_UNPACK (scm_from_locale_string ("}"));
1666 scm_print_opts
[SCM_PRINT_KEYWORD_STYLE_I
].val
= SCM_UNPACK (sym_reader
);