1 /* Lisp object printing and output streams.
2 Copyright (C) 1985, 86, 88, 93, 94, 95, 97, 98, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
32 #include "dispextern.h"
34 #include "intervals.h"
36 Lisp_Object Vstandard_output
, Qstandard_output
;
38 Lisp_Object Qtemp_buffer_setup_hook
;
40 /* These are used to print like we read. */
41 extern Lisp_Object Qbackquote
, Qcomma
, Qcomma_at
, Qcomma_dot
, Qfunction
;
43 Lisp_Object Vfloat_output_format
, Qfloat_output_format
;
45 /* Work around a problem that happens because math.h on hpux 7
46 defines two static variables--which, in Emacs, are not really static,
47 because `static' is defined as nothing. The problem is that they are
48 defined both here and in lread.c.
49 These macros prevent the name conflict. */
50 #if defined (HPUX) && !defined (HPUX8)
51 #define _MAXLDBL print_maxldbl
52 #define _NMAXLDBL print_nmaxldbl
61 /* Default to values appropriate for IEEE floating point. */
66 #define DBL_MANT_DIG 53
72 #define DBL_MIN 2.2250738585072014e-308
75 #ifdef DBL_MIN_REPLACEMENT
77 #define DBL_MIN DBL_MIN_REPLACEMENT
80 /* Define DOUBLE_DIGITS_BOUND, an upper bound on the number of decimal digits
81 needed to express a float without losing information.
82 The general-case formula is valid for the usual case, IEEE floating point,
83 but many compilers can't optimize the formula to an integer constant,
84 so make a special case for it. */
85 #if FLT_RADIX == 2 && DBL_MANT_DIG == 53
86 #define DOUBLE_DIGITS_BOUND 17 /* IEEE floating point */
88 #define DOUBLE_DIGITS_BOUND ((int) ceil (log10 (pow (FLT_RADIX, DBL_MANT_DIG))))
91 /* Avoid actual stack overflow in print. */
94 /* Detect most circularities to print finite output. */
95 #define PRINT_CIRCLE 200
96 Lisp_Object being_printed
[PRINT_CIRCLE
];
98 /* When printing into a buffer, first we put the text in this
99 block, then insert it all at once. */
102 /* Size allocated in print_buffer. */
103 int print_buffer_size
;
104 /* Chars stored in print_buffer. */
105 int print_buffer_pos
;
106 /* Bytes stored in print_buffer. */
107 int print_buffer_pos_byte
;
109 /* Maximum length of list to print in full; noninteger means
110 effectively infinity */
112 Lisp_Object Vprint_length
;
114 /* Maximum depth of list to print in full; noninteger means
115 effectively infinity. */
117 Lisp_Object Vprint_level
;
119 /* Nonzero means print newlines in strings as \n. */
121 int print_escape_newlines
;
123 /* Nonzero means to print single-byte non-ascii characters in strings as
126 int print_escape_nonascii
;
128 /* Nonzero means to print multibyte characters in strings as hex escapes. */
130 int print_escape_multibyte
;
132 Lisp_Object Qprint_escape_newlines
;
133 Lisp_Object Qprint_escape_multibyte
, Qprint_escape_nonascii
;
135 /* Nonzero means print (quote foo) forms as 'foo, etc. */
139 /* Non-nil means print #: before uninterned symbols. */
141 Lisp_Object Vprint_gensym
;
143 /* Non-nil means print recursive structures using #n= and #n# syntax. */
145 Lisp_Object Vprint_circle
;
147 /* Non-nil means keep continuous number for #n= and #n# syntax
148 between several print functions. */
150 Lisp_Object Vprint_continuous_numbering
;
152 /* Vprint_number_table is a vector like [OBJ1 STAT1 OBJ2 STAT2 ...],
153 where OBJn are objects going to be printed, and STATn are their status,
154 which may be different meanings during process. See the comments of
155 the functions print and print_preprocess for details.
156 print_number_index keeps the last position the next object should be added,
157 twice of which is the actual vector position in Vprint_number_table. */
158 int print_number_index
;
159 Lisp_Object Vprint_number_table
;
161 /* PRINT_NUMBER_OBJECT returns the I'th object in Vprint_number_table TABLE.
162 PRINT_NUMBER_STATUS returns the status of the I'th object in TABLE.
163 See the comment of the variable Vprint_number_table. */
164 #define PRINT_NUMBER_OBJECT(table,i) XVECTOR ((table))->contents[(i) * 2]
165 #define PRINT_NUMBER_STATUS(table,i) XVECTOR ((table))->contents[(i) * 2 + 1]
167 /* Nonzero means print newline to stdout before next minibuffer message.
168 Defined in xdisp.c */
170 extern int noninteractive_need_newline
;
172 extern int minibuffer_auto_raise
;
174 #ifdef MAX_PRINT_CHARS
175 static int print_chars
;
176 static int max_print
;
177 #endif /* MAX_PRINT_CHARS */
179 void print_interval ();
182 /* Low level output routines for characters and strings */
184 /* Lisp functions to do output using a stream
185 must have the stream in a variable called printcharfun
186 and must start with PRINTPREPARE, end with PRINTFINISH,
187 and use PRINTDECLARE to declare common variables.
188 Use PRINTCHAR to output one character,
189 or call strout to output a block of characters. */
191 #define PRINTDECLARE \
192 struct buffer *old = current_buffer; \
193 int old_point = -1, start_point = -1; \
194 int old_point_byte = -1, start_point_byte = -1; \
195 int specpdl_count = specpdl_ptr - specpdl; \
196 int free_print_buffer = 0; \
197 int multibyte = !NILP (current_buffer->enable_multibyte_characters); \
200 #define PRINTPREPARE \
201 original = printcharfun; \
202 if (NILP (printcharfun)) printcharfun = Qt; \
203 if (BUFFERP (printcharfun)) \
205 if (XBUFFER (printcharfun) != current_buffer) \
206 Fset_buffer (printcharfun); \
207 printcharfun = Qnil; \
209 if (MARKERP (printcharfun)) \
211 if (!(XMARKER (original)->buffer)) \
212 error ("Marker does not point anywhere"); \
213 if (XMARKER (original)->buffer != current_buffer) \
214 set_buffer_internal (XMARKER (original)->buffer); \
216 old_point_byte = PT_BYTE; \
217 SET_PT_BOTH (marker_position (printcharfun), \
218 marker_byte_position (printcharfun)); \
220 start_point_byte = PT_BYTE; \
221 printcharfun = Qnil; \
223 if (NILP (printcharfun)) \
225 Lisp_Object string; \
226 if (NILP (current_buffer->enable_multibyte_characters) \
227 && ! print_escape_multibyte) \
228 specbind (Qprint_escape_multibyte, Qt); \
229 if (! NILP (current_buffer->enable_multibyte_characters) \
230 && ! print_escape_nonascii) \
231 specbind (Qprint_escape_nonascii, Qt); \
232 if (print_buffer != 0) \
234 string = make_string_from_bytes (print_buffer, \
236 print_buffer_pos_byte); \
237 record_unwind_protect (print_unwind, string); \
241 print_buffer_size = 1000; \
242 print_buffer = (char *) xmalloc (print_buffer_size); \
243 free_print_buffer = 1; \
245 print_buffer_pos = 0; \
246 print_buffer_pos_byte = 0; \
248 if (EQ (printcharfun, Qt) && ! noninteractive) \
249 setup_echo_area_for_printing (multibyte);
251 #define PRINTFINISH \
252 if (NILP (printcharfun)) \
254 if (print_buffer_pos != print_buffer_pos_byte \
255 && NILP (current_buffer->enable_multibyte_characters)) \
257 unsigned char *temp \
258 = (unsigned char *) alloca (print_buffer_pos + 1); \
259 copy_text (print_buffer, temp, print_buffer_pos_byte, \
261 insert_1_both (temp, print_buffer_pos, \
262 print_buffer_pos, 0, 1, 0); \
265 insert_1_both (print_buffer, print_buffer_pos, \
266 print_buffer_pos_byte, 0, 1, 0); \
268 if (free_print_buffer) \
270 xfree (print_buffer); \
273 unbind_to (specpdl_count, Qnil); \
274 if (MARKERP (original)) \
275 set_marker_both (original, Qnil, PT, PT_BYTE); \
276 if (old_point >= 0) \
277 SET_PT_BOTH (old_point + (old_point >= start_point \
278 ? PT - start_point : 0), \
279 old_point_byte + (old_point_byte >= start_point_byte \
280 ? PT_BYTE - start_point_byte : 0)); \
281 if (old != current_buffer) \
282 set_buffer_internal (old);
284 #define PRINTCHAR(ch) printchar (ch, printcharfun)
286 /* This is used to restore the saved contents of print_buffer
287 when there is a recursive call to print. */
290 print_unwind (saved_text
)
291 Lisp_Object saved_text
;
293 bcopy (XSTRING (saved_text
)->data
, print_buffer
, XSTRING (saved_text
)->size
);
298 /* Print character CH using method FUN. FUN nil means print to
299 print_buffer. FUN t means print to echo area or stdout if
300 non-interactive. If FUN is neither nil nor t, call FUN with CH as
308 #ifdef MAX_PRINT_CHARS
311 #endif /* MAX_PRINT_CHARS */
313 if (!NILP (fun
) && !EQ (fun
, Qt
))
314 call1 (fun
, make_number (ch
));
317 unsigned char str
[MAX_MULTIBYTE_LENGTH
];
318 int len
= CHAR_STRING (ch
, str
);
324 if (print_buffer_pos_byte
+ len
>= print_buffer_size
)
325 print_buffer
= (char *) xrealloc (print_buffer
,
326 print_buffer_size
*= 2);
327 bcopy (str
, print_buffer
+ print_buffer_pos_byte
, len
);
328 print_buffer_pos
+= 1;
329 print_buffer_pos_byte
+= len
;
331 else if (noninteractive
)
333 fwrite (str
, 1, len
, stdout
);
334 noninteractive_need_newline
= 1;
339 = !NILP (current_buffer
->enable_multibyte_characters
);
341 setup_echo_area_for_printing (multibyte_p
);
343 message_dolog (str
, len
, 0, multibyte_p
);
349 /* Output SIZE characters, SIZE_BYTE bytes from string PTR using
350 method PRINTCHARFUN. If SIZE < 0, use the string length of PTR for
351 both SIZE and SIZE_BYTE. PRINTCHARFUN nil means output to
352 print_buffer. PRINTCHARFUN t means output to the echo area or to
353 stdout if non-interactive. If neither nil nor t, call Lisp
354 function PRINTCHARFUN for each character printed. MULTIBYTE
355 non-zero means PTR contains multibyte characters. */
358 strout (ptr
, size
, size_byte
, printcharfun
, multibyte
)
361 Lisp_Object printcharfun
;
365 size_byte
= size
= strlen (ptr
);
367 if (NILP (printcharfun
))
369 if (print_buffer_pos_byte
+ size_byte
> print_buffer_size
)
371 print_buffer_size
= print_buffer_size
* 2 + size_byte
;
372 print_buffer
= (char *) xrealloc (print_buffer
,
375 bcopy (ptr
, print_buffer
+ print_buffer_pos_byte
, size_byte
);
376 print_buffer_pos
+= size
;
377 print_buffer_pos_byte
+= size_byte
;
379 #ifdef MAX_PRINT_CHARS
382 #endif /* MAX_PRINT_CHARS */
384 else if (noninteractive
&& EQ (printcharfun
, Qt
))
386 fwrite (ptr
, 1, size_byte
, stdout
);
387 noninteractive_need_newline
= 1;
389 else if (EQ (printcharfun
, Qt
))
391 /* Output to echo area. We're trying to avoid a little overhead
392 here, that's the reason we don't call printchar to do the
396 = !NILP (current_buffer
->enable_multibyte_characters
);
398 setup_echo_area_for_printing (multibyte_p
);
399 message_dolog (ptr
, size_byte
, 0, multibyte_p
);
401 if (size
== size_byte
)
403 for (i
= 0; i
< size
; ++i
)
404 insert_char ((unsigned char )*ptr
++);
409 for (i
= 0; i
< size_byte
; i
+= len
)
411 int ch
= STRING_CHAR_AND_LENGTH (ptr
+ i
, size_byte
- i
, len
);
416 #ifdef MAX_PRINT_CHARS
419 #endif /* MAX_PRINT_CHARS */
423 /* PRINTCHARFUN is a Lisp function. */
426 if (size
== size_byte
)
428 while (i
< size_byte
)
436 while (i
< size_byte
)
438 /* Here, we must convert each multi-byte form to the
439 corresponding character code before handing it to
442 int ch
= STRING_CHAR_AND_LENGTH (ptr
+ i
, size_byte
- i
, len
);
450 /* Print the contents of a string STRING using PRINTCHARFUN.
451 It isn't safe to use strout in many cases,
452 because printing one char can relocate. */
455 print_string (string
, printcharfun
)
457 Lisp_Object printcharfun
;
459 if (EQ (printcharfun
, Qt
) || NILP (printcharfun
))
463 if (STRING_MULTIBYTE (string
))
464 chars
= XSTRING (string
)->size
;
465 else if (EQ (printcharfun
, Qt
)
466 ? ! NILP (buffer_defaults
.enable_multibyte_characters
)
467 : ! NILP (current_buffer
->enable_multibyte_characters
))
469 /* If unibyte string STRING contains 8-bit codes, we must
470 convert STRING to a multibyte string containing the same
475 chars
= STRING_BYTES (XSTRING (string
));
476 bytes
= parse_str_to_multibyte (XSTRING (string
)->data
, chars
);
479 newstr
= make_uninit_multibyte_string (chars
, bytes
);
480 bcopy (XSTRING (string
)->data
, XSTRING (newstr
)->data
, chars
);
481 str_to_multibyte (XSTRING (newstr
)->data
, bytes
, chars
);
486 chars
= STRING_BYTES (XSTRING (string
));
488 /* strout is safe for output to a frame (echo area) or to print_buffer. */
489 strout (XSTRING (string
)->data
,
490 chars
, STRING_BYTES (XSTRING (string
)),
491 printcharfun
, STRING_MULTIBYTE (string
));
495 /* Otherwise, string may be relocated by printing one char.
496 So re-fetch the string address for each character. */
498 int size
= XSTRING (string
)->size
;
499 int size_byte
= STRING_BYTES (XSTRING (string
));
502 if (size
== size_byte
)
503 for (i
= 0; i
< size
; i
++)
504 PRINTCHAR (XSTRING (string
)->data
[i
]);
506 for (i
= 0; i
< size_byte
; i
++)
508 /* Here, we must convert each multi-byte form to the
509 corresponding character code before handing it to PRINTCHAR. */
511 int ch
= STRING_CHAR_AND_LENGTH (XSTRING (string
)->data
+ i
,
513 if (!CHAR_VALID_P (ch
, 0))
515 ch
= XSTRING (string
)->data
[i
];
525 DEFUN ("write-char", Fwrite_char
, Swrite_char
, 1, 2, 0,
526 doc
: /* Output character CHARACTER to stream PRINTCHARFUN.
527 PRINTCHARFUN defaults to the value of `standard-output' (which see). */)
528 (character
, printcharfun
)
529 Lisp_Object character
, printcharfun
;
533 if (NILP (printcharfun
))
534 printcharfun
= Vstandard_output
;
535 CHECK_NUMBER (character
);
537 PRINTCHAR (XINT (character
));
542 /* Used from outside of print.c to print a block of SIZE
543 single-byte chars at DATA on the default output stream.
544 Do not use this on the contents of a Lisp string. */
547 write_string (data
, size
)
552 Lisp_Object printcharfun
;
554 printcharfun
= Vstandard_output
;
557 strout (data
, size
, size
, printcharfun
, 0);
561 /* Used from outside of print.c to print a block of SIZE
562 single-byte chars at DATA on a specified stream PRINTCHARFUN.
563 Do not use this on the contents of a Lisp string. */
566 write_string_1 (data
, size
, printcharfun
)
569 Lisp_Object printcharfun
;
574 strout (data
, size
, size
, printcharfun
, 0);
580 temp_output_buffer_setup (bufname
)
583 int count
= specpdl_ptr
- specpdl
;
584 register struct buffer
*old
= current_buffer
;
585 register Lisp_Object buf
;
587 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
589 Fset_buffer (Fget_buffer_create (build_string (bufname
)));
591 current_buffer
->directory
= old
->directory
;
592 current_buffer
->read_only
= Qnil
;
593 current_buffer
->filename
= Qnil
;
594 current_buffer
->undo_list
= Qt
;
595 current_buffer
->overlays_before
= Qnil
;
596 current_buffer
->overlays_after
= Qnil
;
597 current_buffer
->enable_multibyte_characters
598 = buffer_defaults
.enable_multibyte_characters
;
600 XSETBUFFER (buf
, current_buffer
);
602 if (!NILP (Vrun_hooks
))
603 call1 (Vrun_hooks
, Qtemp_buffer_setup_hook
);
605 unbind_to (count
, Qnil
);
607 specbind (Qstandard_output
, buf
);
611 internal_with_output_to_temp_buffer (bufname
, function
, args
)
613 Lisp_Object (*function
) P_ ((Lisp_Object
));
616 int count
= specpdl_ptr
- specpdl
;
617 Lisp_Object buf
, val
;
621 record_unwind_protect (Fset_buffer
, Fcurrent_buffer ());
622 temp_output_buffer_setup (bufname
);
623 buf
= Vstandard_output
;
626 val
= (*function
) (args
);
629 temp_output_buffer_show (buf
);
632 return unbind_to (count
, val
);
635 DEFUN ("with-output-to-temp-buffer",
636 Fwith_output_to_temp_buffer
, Swith_output_to_temp_buffer
,
638 doc
: /* Bind `standard-output' to buffer BUFNAME, eval BODY, then show that buffer.
639 The buffer is cleared out initially, and marked as unmodified when done.
640 All output done by BODY is inserted in that buffer by default.
641 The buffer is displayed in another window, but not selected.
642 The value of the last form in BODY is returned.
643 If BODY does not finish normally, the buffer BUFNAME is not displayed.
645 The hook `temp-buffer-setup-hook' is run before BODY,
646 with the buffer BUFNAME temporarily current.
647 The hook `temp-buffer-show-hook' is run after the buffer is displayed,
648 with the buffer temporarily current, and the window that was used
649 to display it temporarily selected.
651 If variable `temp-buffer-show-function' is non-nil, call it at the end
652 to get the buffer displayed instead of just displaying the non-selected
653 buffer and calling the hook. It gets one argument, the buffer to display.
655 usage: (with-output-to-temp-buffer BUFFNAME BODY ...) */)
661 int count
= specpdl_ptr
- specpdl
;
662 Lisp_Object buf
, val
;
665 name
= Feval (Fcar (args
));
667 temp_output_buffer_setup (XSTRING (name
)->data
);
668 buf
= Vstandard_output
;
671 val
= Fprogn (XCDR (args
));
674 temp_output_buffer_show (buf
);
677 return unbind_to (count
, val
);
681 static void print ();
682 static void print_preprocess ();
683 static void print_preprocess_string ();
684 static void print_object ();
686 DEFUN ("terpri", Fterpri
, Sterpri
, 0, 1, 0,
687 doc
: /* Output a newline to stream PRINTCHARFUN.
688 If PRINTCHARFUN is omitted or nil, the value of `standard-output' is used. */)
690 Lisp_Object printcharfun
;
694 if (NILP (printcharfun
))
695 printcharfun
= Vstandard_output
;
702 DEFUN ("prin1", Fprin1
, Sprin1
, 1, 2, 0,
703 doc
: /* Output the printed representation of OBJECT, any Lisp object.
704 Quoting characters are printed when needed to make output that `read'
705 can handle, whenever this is possible. For complex objects, the behavior
706 is controlled by `print-level' and `print-length', which see.
708 OBJECT is any of the Lisp data types: a number, a string, a symbol,
709 a list, a buffer, a window, a frame, etc.
711 A printed representation of an object is text which describes that object.
713 Optional argument PRINTCHARFUN is the output stream, which can be one
716 - a buffer, in which case output is inserted into that buffer at point;
717 - a marker, in which case output is inserted at marker's position;
718 - a function, in which case that function is called once for each
719 character of OBJECT's printed representation;
720 - a symbol, in which case that symbol's function definition is called; or
721 - t, in which case the output is displayed in the echo area.
723 If PRINTCHARFUN is omitted, the value of `standard-output' (which see)
725 (object
, printcharfun
)
726 Lisp_Object object
, printcharfun
;
730 #ifdef MAX_PRINT_CHARS
732 #endif /* MAX_PRINT_CHARS */
733 if (NILP (printcharfun
))
734 printcharfun
= Vstandard_output
;
736 print (object
, printcharfun
, 1);
741 /* a buffer which is used to hold output being built by prin1-to-string */
742 Lisp_Object Vprin1_to_string_buffer
;
744 DEFUN ("prin1-to-string", Fprin1_to_string
, Sprin1_to_string
, 1, 2, 0,
745 doc
: /* Return a string containing the printed representation of OBJECT.
746 OBJECT can be any Lisp object. This function outputs quoting characters
747 when ncessary to make output that `read' can handle, whenever possible,
748 unless the optional second argument NOESCAPE is non-nil.
750 OBJECT is any of the Lisp data types: a number, a string, a symbol,
751 a list, a buffer, a window, a frame, etc.
753 A printed representation of an object is text which describes that object. */)
755 Lisp_Object object
, noescape
;
758 Lisp_Object printcharfun
;
759 struct gcpro gcpro1
, gcpro2
;
762 /* Save and restore this--we are altering a buffer
763 but we don't want to deactivate the mark just for that.
764 No need for specbind, since errors deactivate the mark. */
765 tem
= Vdeactivate_mark
;
766 GCPRO2 (object
, tem
);
768 printcharfun
= Vprin1_to_string_buffer
;
770 print (object
, printcharfun
, NILP (noescape
));
771 /* Make Vprin1_to_string_buffer be the default buffer after PRINTFINSH */
773 set_buffer_internal (XBUFFER (Vprin1_to_string_buffer
));
774 object
= Fbuffer_string ();
777 set_buffer_internal (old
);
779 Vdeactivate_mark
= tem
;
785 DEFUN ("princ", Fprinc
, Sprinc
, 1, 2, 0,
786 doc
: /* Output the printed representation of OBJECT, any Lisp object.
787 No quoting characters are used; no delimiters are printed around
788 the contents of strings.
790 OBJECT is any of the Lisp data types: a number, a string, a symbol,
791 a list, a buffer, a window, a frame, etc.
793 A printed representation of an object is text which describes that object.
795 Optional argument PRINTCHARFUN is the output stream, which can be one
798 - a buffer, in which case output is inserted into that buffer at point;
799 - a marker, in which case output is inserted at marker's position;
800 - a function, in which case that function is called once for each
801 character of OBJECT's printed representation;
802 - a symbol, in which case that symbol's function definition is called; or
803 - t, in which case the output is displayed in the echo area.
805 If PRINTCHARFUN is omitted, the value of `standard-output' (which see)
807 (object
, printcharfun
)
808 Lisp_Object object
, printcharfun
;
812 if (NILP (printcharfun
))
813 printcharfun
= Vstandard_output
;
815 print (object
, printcharfun
, 0);
820 DEFUN ("print", Fprint
, Sprint
, 1, 2, 0,
821 doc
: /* Output the printed representation of OBJECT, with newlines around it.
822 Quoting characters are printed when needed to make output that `read'
823 can handle, whenever this is possible. For complex objects, the behavior
824 is controlled by `print-level' and `print-length', which see.
826 OBJECT is any of the Lisp data types: a number, a string, a symbol,
827 a list, a buffer, a window, a frame, etc.
829 A printed representation of an object is text which describes that object.
831 Optional argument PRINTCHARFUN is the output stream, which can be one
834 - a buffer, in which case output is inserted into that buffer at point;
835 - a marker, in which case output is inserted at marker's position;
836 - a function, in which case that function is called once for each
837 character of OBJECT's printed representation;
838 - a symbol, in which case that symbol's function definition is called; or
839 - t, in which case the output is displayed in the echo area.
841 If PRINTCHARFUN is omitted, the value of `standard-output' (which see)
843 (object
, printcharfun
)
844 Lisp_Object object
, printcharfun
;
849 #ifdef MAX_PRINT_CHARS
851 max_print
= MAX_PRINT_CHARS
;
852 #endif /* MAX_PRINT_CHARS */
853 if (NILP (printcharfun
))
854 printcharfun
= Vstandard_output
;
858 print (object
, printcharfun
, 1);
861 #ifdef MAX_PRINT_CHARS
864 #endif /* MAX_PRINT_CHARS */
869 /* The subroutine object for external-debugging-output is kept here
870 for the convenience of the debugger. */
871 Lisp_Object Qexternal_debugging_output
;
873 DEFUN ("external-debugging-output", Fexternal_debugging_output
, Sexternal_debugging_output
, 1, 1, 0,
874 doc
: /* Write CHARACTER to stderr.
875 You can call print while debugging emacs, and pass it this function
876 to make it write to the debugging output. */)
878 Lisp_Object character
;
880 CHECK_NUMBER (character
);
881 putc (XINT (character
), stderr
);
884 /* Send the output to a debugger (nothing happens if there isn't one). */
886 char buf
[2] = {(char) XINT (character
), '\0'};
887 OutputDebugString (buf
);
894 /* This is the interface for debugging printing. */
900 Fprin1 (arg
, Qexternal_debugging_output
);
901 fprintf (stderr
, "\r\n");
904 DEFUN ("error-message-string", Ferror_message_string
, Serror_message_string
,
906 doc
: /* Convert an error value (ERROR-SYMBOL . DATA) to an error message. */)
910 struct buffer
*old
= current_buffer
;
914 /* If OBJ is (error STRING), just return STRING.
915 That is not only faster, it also avoids the need to allocate
916 space here when the error is due to memory full. */
917 if (CONSP (obj
) && EQ (XCAR (obj
), Qerror
)
918 && CONSP (XCDR (obj
))
919 && STRINGP (XCAR (XCDR (obj
)))
920 && NILP (XCDR (XCDR (obj
))))
921 return XCAR (XCDR (obj
));
923 print_error_message (obj
, Vprin1_to_string_buffer
);
925 set_buffer_internal (XBUFFER (Vprin1_to_string_buffer
));
926 value
= Fbuffer_string ();
930 set_buffer_internal (old
);
936 /* Print an error message for the error DATA onto Lisp output stream
937 STREAM (suitable for the print functions). */
940 print_error_message (data
, stream
)
941 Lisp_Object data
, stream
;
943 Lisp_Object errname
, errmsg
, file_error
, tail
;
947 errname
= Fcar (data
);
949 if (EQ (errname
, Qerror
))
954 errmsg
= Fcar (data
);
959 Lisp_Object error_conditions
;
960 errmsg
= Fget (errname
, Qerror_message
);
961 error_conditions
= Fget (errname
, Qerror_conditions
);
962 file_error
= Fmemq (Qfile_error
, error_conditions
);
965 /* Print an error message including the data items. */
967 tail
= Fcdr_safe (data
);
970 /* If we know from where the error was signaled, show it in
972 if (!NILP (Vsignaling_function
) && SYMBOLP (Vsignaling_function
))
974 char *name
= XSYMBOL (Vsignaling_function
)->name
->data
;
975 message_dolog (name
, strlen (name
), 0, 0);
976 message_dolog (": ", 2, 0, 0);
977 Vsignaling_function
= Qnil
;
980 /* For file-error, make error message by concatenating
981 all the data items. They are all strings. */
982 if (!NILP (file_error
) && CONSP (tail
))
983 errmsg
= XCAR (tail
), tail
= XCDR (tail
);
985 if (STRINGP (errmsg
))
986 Fprinc (errmsg
, stream
);
988 write_string_1 ("peculiar error", -1, stream
);
990 for (i
= 0; CONSP (tail
); tail
= XCDR (tail
), i
++)
994 write_string_1 (i
? ", " : ": ", 2, stream
);
996 if (!NILP (file_error
) || EQ (errname
, Qend_of_file
))
997 Fprinc (obj
, stream
);
999 Fprin1 (obj
, stream
);
1008 * The buffer should be at least as large as the max string size of the
1009 * largest float, printed in the biggest notation. This is undoubtedly
1010 * 20d float_output_format, with the negative of the C-constant "HUGE"
1013 * On the vax the worst case is -1e38 in 20d format which takes 61 bytes.
1015 * I assume that IEEE-754 format numbers can take 329 bytes for the worst
1016 * case of -1e307 in 20d float_output_format. What is one to do (short of
1017 * re-writing _doprnt to be more sane)?
1022 float_to_string (buf
, data
)
1029 /* Check for plus infinity in a way that won't lose
1030 if there is no plus infinity. */
1031 if (data
== data
/ 2 && data
> 1.0)
1033 strcpy (buf
, "1.0e+INF");
1036 /* Likewise for minus infinity. */
1037 if (data
== data
/ 2 && data
< -1.0)
1039 strcpy (buf
, "-1.0e+INF");
1042 /* Check for NaN in a way that won't fail if there are no NaNs. */
1043 if (! (data
* 0.0 >= 0.0))
1045 /* Prepend "-" if the NaN's sign bit is negative.
1046 The sign bit of a double is the bit that is 1 in -0.0. */
1048 union { double d
; char c
[sizeof (double)]; } u_data
, u_minus_zero
;
1050 u_minus_zero
.d
= - 0.0;
1051 for (i
= 0; i
< sizeof (double); i
++)
1052 if (u_data
.c
[i
] & u_minus_zero
.c
[i
])
1058 strcpy (buf
, "0.0e+NaN");
1062 if (NILP (Vfloat_output_format
)
1063 || !STRINGP (Vfloat_output_format
))
1066 /* Generate the fewest number of digits that represent the
1067 floating point value without losing information.
1068 The following method is simple but a bit slow.
1069 For ideas about speeding things up, please see:
1071 Guy L Steele Jr & Jon L White, How to print floating-point numbers
1072 accurately. SIGPLAN notices 25, 6 (June 1990), 112-126.
1074 Robert G Burger & R Kent Dybvig, Printing floating point numbers
1075 quickly and accurately, SIGPLAN notices 31, 5 (May 1996), 108-116. */
1077 width
= fabs (data
) < DBL_MIN
? 1 : DBL_DIG
;
1079 sprintf (buf
, "%.*g", width
, data
);
1080 while (width
++ < DOUBLE_DIGITS_BOUND
&& atof (buf
) != data
);
1082 else /* oink oink */
1084 /* Check that the spec we have is fully valid.
1085 This means not only valid for printf,
1086 but meant for floats, and reasonable. */
1087 cp
= XSTRING (Vfloat_output_format
)->data
;
1096 /* Check the width specification. */
1098 if ('0' <= *cp
&& *cp
<= '9')
1102 width
= (width
* 10) + (*cp
++ - '0');
1103 while (*cp
>= '0' && *cp
<= '9');
1105 /* A precision of zero is valid only for %f. */
1107 || (width
== 0 && *cp
!= 'f'))
1111 if (*cp
!= 'e' && *cp
!= 'f' && *cp
!= 'g')
1117 sprintf (buf
, XSTRING (Vfloat_output_format
)->data
, data
);
1120 /* Make sure there is a decimal point with digit after, or an
1121 exponent, so that the value is readable as a float. But don't do
1122 this with "%.0f"; it's valid for that not to produce a decimal
1123 point. Note that width can be 0 only for %.0f. */
1126 for (cp
= buf
; *cp
; cp
++)
1127 if ((*cp
< '0' || *cp
> '9') && *cp
!= '-')
1130 if (*cp
== '.' && cp
[1] == 0)
1147 print (obj
, printcharfun
, escapeflag
)
1149 register Lisp_Object printcharfun
;
1154 /* Reset print_number_index and Vprint_number_table only when
1155 the variable Vprint_continuous_numbering is nil. Otherwise,
1156 the values of these variables will be kept between several
1158 if (NILP (Vprint_continuous_numbering
))
1160 print_number_index
= 0;
1161 Vprint_number_table
= Qnil
;
1164 /* Construct Vprint_number_table for print-gensym and print-circle. */
1165 if (!NILP (Vprint_gensym
) || !NILP (Vprint_circle
))
1167 int i
, start
, index
;
1168 /* Construct Vprint_number_table. */
1169 start
= index
= print_number_index
;
1170 print_preprocess (obj
);
1171 /* Remove unnecessary objects, which appear only once in OBJ;
1172 that is, whose status is Qnil. */
1173 for (i
= start
; i
< print_number_index
; i
++)
1174 if (!NILP (PRINT_NUMBER_STATUS (Vprint_number_table
, i
)))
1176 PRINT_NUMBER_OBJECT (Vprint_number_table
, index
)
1177 = PRINT_NUMBER_OBJECT (Vprint_number_table
, i
);
1178 /* Reset the status field for the next print step. Now this
1179 field means whether the object has already been printed. */
1180 PRINT_NUMBER_STATUS (Vprint_number_table
, index
) = Qnil
;
1183 print_number_index
= index
;
1186 print_object (obj
, printcharfun
, escapeflag
);
1189 /* Construct Vprint_number_table according to the structure of OBJ.
1190 OBJ itself and all its elements will be added to Vprint_number_table
1191 recursively if it is a list, vector, compiled function, char-table,
1192 string (its text properties will be traced), or a symbol that has
1193 no obarray (this is for the print-gensym feature).
1194 The status fields of Vprint_number_table mean whether each object appears
1195 more than once in OBJ: Qnil at the first time, and Qt after that . */
1197 print_preprocess (obj
)
1203 if (STRINGP (obj
) || CONSP (obj
) || VECTORP (obj
)
1204 || COMPILEDP (obj
) || CHAR_TABLE_P (obj
)
1205 || (! NILP (Vprint_gensym
)
1207 && !SYMBOL_INTERNED_P (obj
)))
1209 /* In case print-circle is nil and print-gensym is t,
1210 add OBJ to Vprint_number_table only when OBJ is a symbol. */
1211 if (! NILP (Vprint_circle
) || SYMBOLP (obj
))
1213 for (i
= 0; i
< print_number_index
; i
++)
1214 if (EQ (PRINT_NUMBER_OBJECT (Vprint_number_table
, i
), obj
))
1216 /* OBJ appears more than once. Let's remember that. */
1217 PRINT_NUMBER_STATUS (Vprint_number_table
, i
) = Qt
;
1221 /* OBJ is not yet recorded. Let's add to the table. */
1222 if (print_number_index
== 0)
1224 /* Initialize the table. */
1225 Vprint_number_table
= Fmake_vector (make_number (40), Qnil
);
1227 else if (XVECTOR (Vprint_number_table
)->size
== print_number_index
* 2)
1229 /* Reallocate the table. */
1230 int i
= print_number_index
* 4;
1231 Lisp_Object old_table
= Vprint_number_table
;
1232 Vprint_number_table
= Fmake_vector (make_number (i
), Qnil
);
1233 for (i
= 0; i
< print_number_index
; i
++)
1235 PRINT_NUMBER_OBJECT (Vprint_number_table
, i
)
1236 = PRINT_NUMBER_OBJECT (old_table
, i
);
1237 PRINT_NUMBER_STATUS (Vprint_number_table
, i
)
1238 = PRINT_NUMBER_STATUS (old_table
, i
);
1241 PRINT_NUMBER_OBJECT (Vprint_number_table
, print_number_index
) = obj
;
1242 /* If Vprint_continuous_numbering is non-nil and OBJ is a gensym,
1243 always print the gensym with a number. This is a special for
1244 the lisp function byte-compile-output-docform. */
1245 if (!NILP (Vprint_continuous_numbering
)
1247 && !SYMBOL_INTERNED_P (obj
))
1248 PRINT_NUMBER_STATUS (Vprint_number_table
, print_number_index
) = Qt
;
1249 print_number_index
++;
1252 switch (XGCTYPE (obj
))
1255 /* A string may have text properties, which can be circular. */
1256 traverse_intervals_noorder (XSTRING (obj
)->intervals
,
1257 print_preprocess_string
, Qnil
);
1261 print_preprocess (XCAR (obj
));
1265 case Lisp_Vectorlike
:
1266 size
= XVECTOR (obj
)->size
& PSEUDOVECTOR_SIZE_MASK
;
1267 for (i
= 0; i
< size
; i
++)
1268 print_preprocess (XVECTOR (obj
)->contents
[i
]);
1278 print_preprocess_string (interval
, arg
)
1282 print_preprocess (interval
->plist
);
1286 print_object (obj
, printcharfun
, escapeflag
)
1288 register Lisp_Object printcharfun
;
1295 /* Detect circularities and truncate them. */
1296 if (STRINGP (obj
) || CONSP (obj
) || VECTORP (obj
)
1297 || COMPILEDP (obj
) || CHAR_TABLE_P (obj
)
1298 || (! NILP (Vprint_gensym
)
1300 && !SYMBOL_INTERNED_P (obj
)))
1302 if (NILP (Vprint_circle
) && NILP (Vprint_gensym
))
1304 /* Simple but incomplete way. */
1306 for (i
= 0; i
< print_depth
; i
++)
1307 if (EQ (obj
, being_printed
[i
]))
1309 sprintf (buf
, "#%d", i
);
1310 strout (buf
, -1, -1, printcharfun
, 0);
1313 being_printed
[print_depth
] = obj
;
1317 /* With the print-circle feature. */
1319 for (i
= 0; i
< print_number_index
; i
++)
1320 if (EQ (PRINT_NUMBER_OBJECT (Vprint_number_table
, i
), obj
))
1322 if (NILP (PRINT_NUMBER_STATUS (Vprint_number_table
, i
)))
1324 /* Add a prefix #n= if OBJ has not yet been printed;
1325 that is, its status field is nil. */
1326 sprintf (buf
, "#%d=", i
+ 1);
1327 strout (buf
, -1, -1, printcharfun
, 0);
1328 /* OBJ is going to be printed. Set the status to t. */
1329 PRINT_NUMBER_STATUS (Vprint_number_table
, i
) = Qt
;
1334 /* Just print #n# if OBJ has already been printed. */
1335 sprintf (buf
, "#%d#", i
+ 1);
1336 strout (buf
, -1, -1, printcharfun
, 0);
1345 if (print_depth
> PRINT_CIRCLE
)
1346 error ("Apparently circular structure being printed");
1347 #ifdef MAX_PRINT_CHARS
1348 if (max_print
&& print_chars
> max_print
)
1353 #endif /* MAX_PRINT_CHARS */
1355 switch (XGCTYPE (obj
))
1358 if (sizeof (int) == sizeof (EMACS_INT
))
1359 sprintf (buf
, "%d", XINT (obj
));
1360 else if (sizeof (long) == sizeof (EMACS_INT
))
1361 sprintf (buf
, "%ld", (long) XINT (obj
));
1364 strout (buf
, -1, -1, printcharfun
, 0);
1369 char pigbuf
[350]; /* see comments in float_to_string */
1371 float_to_string (pigbuf
, XFLOAT_DATA (obj
));
1372 strout (pigbuf
, -1, -1, printcharfun
, 0);
1378 print_string (obj
, printcharfun
);
1381 register int i
, i_byte
;
1382 struct gcpro gcpro1
;
1385 /* 1 means we must ensure that the next character we output
1386 cannot be taken as part of a hex character escape. */
1387 int need_nonhex
= 0;
1391 if (!NULL_INTERVAL_P (XSTRING (obj
)->intervals
))
1398 str
= XSTRING (obj
)->data
;
1399 size_byte
= STRING_BYTES (XSTRING (obj
));
1401 for (i
= 0, i_byte
= 0; i_byte
< size_byte
;)
1403 /* Here, we must convert each multi-byte form to the
1404 corresponding character code before handing it to PRINTCHAR. */
1408 if (STRING_MULTIBYTE (obj
))
1410 c
= STRING_CHAR_AND_LENGTH (str
+ i_byte
,
1411 size_byte
- i_byte
, len
);
1412 if (CHAR_VALID_P (c
, 0))
1422 if (c
== '\n' && print_escape_newlines
)
1427 else if (c
== '\f' && print_escape_newlines
)
1432 else if (! SINGLE_BYTE_CHAR_P (c
) && print_escape_multibyte
)
1434 /* When multibyte is disabled,
1435 print multibyte string chars using hex escapes. */
1436 unsigned char outbuf
[50];
1437 sprintf (outbuf
, "\\x%x", c
);
1438 strout (outbuf
, -1, -1, printcharfun
, 0);
1441 else if (SINGLE_BYTE_CHAR_P (c
) && ! ASCII_BYTE_P (c
)
1442 && print_escape_nonascii
)
1444 /* When printing in a multibyte buffer
1445 or when explicitly requested,
1446 print single-byte non-ASCII string chars
1447 using octal escapes. */
1448 unsigned char outbuf
[5];
1449 sprintf (outbuf
, "\\%03o", c
);
1450 strout (outbuf
, -1, -1, printcharfun
, 0);
1454 /* If we just had a hex escape, and this character
1455 could be taken as part of it,
1456 output `\ ' to prevent that. */
1460 if ((c
>= 'a' && c
<= 'f')
1461 || (c
>= 'A' && c
<= 'F')
1462 || (c
>= '0' && c
<= '9'))
1463 strout ("\\ ", -1, -1, printcharfun
, 0);
1466 if (c
== '\"' || c
== '\\')
1473 if (!NULL_INTERVAL_P (XSTRING (obj
)->intervals
))
1475 traverse_intervals (XSTRING (obj
)->intervals
,
1476 0, print_interval
, printcharfun
);
1486 register int confusing
;
1487 register unsigned char *p
= XSYMBOL (obj
)->name
->data
;
1488 register unsigned char *end
= p
+ STRING_BYTES (XSYMBOL (obj
)->name
);
1490 int i
, i_byte
, size_byte
;
1493 XSETSTRING (name
, XSYMBOL (obj
)->name
);
1495 if (p
!= end
&& (*p
== '-' || *p
== '+')) p
++;
1498 /* If symbol name begins with a digit, and ends with a digit,
1499 and contains nothing but digits and `e', it could be treated
1500 as a number. So set CONFUSING.
1502 Symbols that contain periods could also be taken as numbers,
1503 but periods are always escaped, so we don't have to worry
1505 else if (*p
>= '0' && *p
<= '9'
1506 && end
[-1] >= '0' && end
[-1] <= '9')
1508 while (p
!= end
&& ((*p
>= '0' && *p
<= '9')
1509 /* Needed for \2e10. */
1512 confusing
= (end
== p
);
1517 if (! NILP (Vprint_gensym
) && !SYMBOL_INTERNED_P (obj
))
1523 size_byte
= STRING_BYTES (XSTRING (name
));
1525 for (i
= 0, i_byte
= 0; i_byte
< size_byte
;)
1527 /* Here, we must convert each multi-byte form to the
1528 corresponding character code before handing it to PRINTCHAR. */
1529 FETCH_STRING_CHAR_ADVANCE (c
, name
, i
, i_byte
);
1534 if (c
== '\"' || c
== '\\' || c
== '\''
1535 || c
== ';' || c
== '#' || c
== '(' || c
== ')'
1536 || c
== ',' || c
=='.' || c
== '`'
1537 || c
== '[' || c
== ']' || c
== '?' || c
<= 040
1539 PRINTCHAR ('\\'), confusing
= 0;
1547 /* If deeper than spec'd depth, print placeholder. */
1548 if (INTEGERP (Vprint_level
)
1549 && print_depth
> XINT (Vprint_level
))
1550 strout ("...", -1, -1, printcharfun
, 0);
1551 else if (print_quoted
&& CONSP (XCDR (obj
)) && NILP (XCDR (XCDR (obj
)))
1552 && (EQ (XCAR (obj
), Qquote
)))
1555 print_object (XCAR (XCDR (obj
)), printcharfun
, escapeflag
);
1557 else if (print_quoted
&& CONSP (XCDR (obj
)) && NILP (XCDR (XCDR (obj
)))
1558 && (EQ (XCAR (obj
), Qfunction
)))
1562 print_object (XCAR (XCDR (obj
)), printcharfun
, escapeflag
);
1564 else if (print_quoted
&& CONSP (XCDR (obj
)) && NILP (XCDR (XCDR (obj
)))
1565 && ((EQ (XCAR (obj
), Qbackquote
)
1566 || EQ (XCAR (obj
), Qcomma
)
1567 || EQ (XCAR (obj
), Qcomma_at
)
1568 || EQ (XCAR (obj
), Qcomma_dot
))))
1570 print_object (XCAR (obj
), printcharfun
, 0);
1571 print_object (XCAR (XCDR (obj
)), printcharfun
, escapeflag
);
1577 int print_length
, i
;
1578 Lisp_Object halftail
= obj
;
1580 /* Negative values of print-length are invalid in CL.
1581 Treat them like nil, as CMUCL does. */
1582 if (NATNUMP (Vprint_length
))
1583 print_length
= XFASTINT (Vprint_length
);
1590 /* Detect circular list. */
1591 if (NILP (Vprint_circle
))
1593 /* Simple but imcomplete way. */
1594 if (i
!= 0 && EQ (obj
, halftail
))
1596 sprintf (buf
, " . #%d", i
/ 2);
1597 strout (buf
, -1, -1, printcharfun
, 0);
1603 /* With the print-circle feature. */
1607 for (i
= 0; i
< print_number_index
; i
++)
1608 if (EQ (PRINT_NUMBER_OBJECT (Vprint_number_table
, i
),
1611 if (NILP (PRINT_NUMBER_STATUS (Vprint_number_table
, i
)))
1613 strout (" . ", 3, 3, printcharfun
, 0);
1614 print_object (obj
, printcharfun
, escapeflag
);
1618 sprintf (buf
, " . #%d#", i
+ 1);
1619 strout (buf
, -1, -1, printcharfun
, 0);
1629 if (print_length
&& i
> print_length
)
1631 strout ("...", 3, 3, printcharfun
, 0);
1635 print_object (XCAR (obj
), printcharfun
, escapeflag
);
1639 halftail
= XCDR (halftail
);
1643 /* OBJ non-nil here means it's the end of a dotted list. */
1646 strout (" . ", 3, 3, printcharfun
, 0);
1647 print_object (obj
, printcharfun
, escapeflag
);
1655 case Lisp_Vectorlike
:
1660 strout ("#<process ", -1, -1, printcharfun
, 0);
1661 print_string (XPROCESS (obj
)->name
, printcharfun
);
1665 print_string (XPROCESS (obj
)->name
, printcharfun
);
1667 else if (BOOL_VECTOR_P (obj
))
1670 register unsigned char c
;
1671 struct gcpro gcpro1
;
1673 = (XBOOL_VECTOR (obj
)->size
+ BITS_PER_CHAR
- 1) / BITS_PER_CHAR
;
1679 sprintf (buf
, "%d", XBOOL_VECTOR (obj
)->size
);
1680 strout (buf
, -1, -1, printcharfun
, 0);
1683 /* Don't print more characters than the specified maximum.
1684 Negative values of print-length are invalid. Treat them
1685 like a print-length of nil. */
1686 if (NATNUMP (Vprint_length
)
1687 && XFASTINT (Vprint_length
) < size_in_chars
)
1688 size_in_chars
= XFASTINT (Vprint_length
);
1690 for (i
= 0; i
< size_in_chars
; i
++)
1693 c
= XBOOL_VECTOR (obj
)->data
[i
];
1694 if (c
== '\n' && print_escape_newlines
)
1699 else if (c
== '\f' && print_escape_newlines
)
1706 if (c
== '\"' || c
== '\\')
1715 else if (SUBRP (obj
))
1717 strout ("#<subr ", -1, -1, printcharfun
, 0);
1718 strout (XSUBR (obj
)->symbol_name
, -1, -1, printcharfun
, 0);
1721 else if (WINDOWP (obj
))
1723 strout ("#<window ", -1, -1, printcharfun
, 0);
1724 sprintf (buf
, "%d", XFASTINT (XWINDOW (obj
)->sequence_number
));
1725 strout (buf
, -1, -1, printcharfun
, 0);
1726 if (!NILP (XWINDOW (obj
)->buffer
))
1728 strout (" on ", -1, -1, printcharfun
, 0);
1729 print_string (XBUFFER (XWINDOW (obj
)->buffer
)->name
, printcharfun
);
1733 else if (HASH_TABLE_P (obj
))
1735 struct Lisp_Hash_Table
*h
= XHASH_TABLE (obj
);
1736 strout ("#<hash-table", -1, -1, printcharfun
, 0);
1737 if (SYMBOLP (h
->test
))
1741 strout (XSYMBOL (h
->test
)->name
->data
, -1, -1, printcharfun
, 0);
1743 strout (XSYMBOL (h
->weak
)->name
->data
, -1, -1, printcharfun
, 0);
1745 sprintf (buf
, "%d/%d", XFASTINT (h
->count
),
1746 XVECTOR (h
->next
)->size
);
1747 strout (buf
, -1, -1, printcharfun
, 0);
1749 sprintf (buf
, " 0x%lx", (unsigned long) h
);
1750 strout (buf
, -1, -1, printcharfun
, 0);
1753 else if (BUFFERP (obj
))
1755 if (NILP (XBUFFER (obj
)->name
))
1756 strout ("#<killed buffer>", -1, -1, printcharfun
, 0);
1757 else if (escapeflag
)
1759 strout ("#<buffer ", -1, -1, printcharfun
, 0);
1760 print_string (XBUFFER (obj
)->name
, printcharfun
);
1764 print_string (XBUFFER (obj
)->name
, printcharfun
);
1766 else if (WINDOW_CONFIGURATIONP (obj
))
1768 strout ("#<window-configuration>", -1, -1, printcharfun
, 0);
1770 else if (FRAMEP (obj
))
1772 strout ((FRAME_LIVE_P (XFRAME (obj
))
1773 ? "#<frame " : "#<dead frame "),
1774 -1, -1, printcharfun
, 0);
1775 print_string (XFRAME (obj
)->name
, printcharfun
);
1776 sprintf (buf
, " 0x%lx\\ ", (unsigned long) (XFRAME (obj
)));
1777 strout (buf
, -1, -1, printcharfun
, 0);
1782 int size
= XVECTOR (obj
)->size
;
1783 if (COMPILEDP (obj
))
1786 size
&= PSEUDOVECTOR_SIZE_MASK
;
1788 if (CHAR_TABLE_P (obj
))
1790 /* We print a char-table as if it were a vector,
1791 lumping the parent and default slots in with the
1792 character slots. But we add #^ as a prefix. */
1795 if (SUB_CHAR_TABLE_P (obj
))
1797 size
&= PSEUDOVECTOR_SIZE_MASK
;
1799 if (size
& PSEUDOVECTOR_FLAG
)
1805 register Lisp_Object tem
;
1806 int real_size
= size
;
1808 /* Don't print more elements than the specified maximum. */
1809 if (NATNUMP (Vprint_length
)
1810 && XFASTINT (Vprint_length
) < size
)
1811 size
= XFASTINT (Vprint_length
);
1813 for (i
= 0; i
< size
; i
++)
1815 if (i
) PRINTCHAR (' ');
1816 tem
= XVECTOR (obj
)->contents
[i
];
1817 print_object (tem
, printcharfun
, escapeflag
);
1819 if (size
< real_size
)
1820 strout (" ...", 4, 4, printcharfun
, 0);
1827 switch (XMISCTYPE (obj
))
1829 case Lisp_Misc_Marker
:
1830 strout ("#<marker ", -1, -1, printcharfun
, 0);
1831 /* Do you think this is necessary? */
1832 if (XMARKER (obj
)->insertion_type
!= 0)
1833 strout ("(moves after insertion) ", -1, -1, printcharfun
, 0);
1834 if (!(XMARKER (obj
)->buffer
))
1835 strout ("in no buffer", -1, -1, printcharfun
, 0);
1838 sprintf (buf
, "at %d", marker_position (obj
));
1839 strout (buf
, -1, -1, printcharfun
, 0);
1840 strout (" in ", -1, -1, printcharfun
, 0);
1841 print_string (XMARKER (obj
)->buffer
->name
, printcharfun
);
1846 case Lisp_Misc_Overlay
:
1847 strout ("#<overlay ", -1, -1, printcharfun
, 0);
1848 if (!(XMARKER (OVERLAY_START (obj
))->buffer
))
1849 strout ("in no buffer", -1, -1, printcharfun
, 0);
1852 sprintf (buf
, "from %d to %d in ",
1853 marker_position (OVERLAY_START (obj
)),
1854 marker_position (OVERLAY_END (obj
)));
1855 strout (buf
, -1, -1, printcharfun
, 0);
1856 print_string (XMARKER (OVERLAY_START (obj
))->buffer
->name
,
1862 /* Remaining cases shouldn't happen in normal usage, but let's print
1863 them anyway for the benefit of the debugger. */
1864 case Lisp_Misc_Free
:
1865 strout ("#<misc free cell>", -1, -1, printcharfun
, 0);
1868 case Lisp_Misc_Intfwd
:
1869 sprintf (buf
, "#<intfwd to %d>", *XINTFWD (obj
)->intvar
);
1870 strout (buf
, -1, -1, printcharfun
, 0);
1873 case Lisp_Misc_Boolfwd
:
1874 sprintf (buf
, "#<boolfwd to %s>",
1875 (*XBOOLFWD (obj
)->boolvar
? "t" : "nil"));
1876 strout (buf
, -1, -1, printcharfun
, 0);
1879 case Lisp_Misc_Objfwd
:
1880 strout ("#<objfwd to ", -1, -1, printcharfun
, 0);
1881 print_object (*XOBJFWD (obj
)->objvar
, printcharfun
, escapeflag
);
1885 case Lisp_Misc_Buffer_Objfwd
:
1886 strout ("#<buffer_objfwd to ", -1, -1, printcharfun
, 0);
1887 print_object (PER_BUFFER_VALUE (current_buffer
,
1888 XBUFFER_OBJFWD (obj
)->offset
),
1889 printcharfun
, escapeflag
);
1893 case Lisp_Misc_Kboard_Objfwd
:
1894 strout ("#<kboard_objfwd to ", -1, -1, printcharfun
, 0);
1895 print_object (*(Lisp_Object
*)((char *) current_kboard
1896 + XKBOARD_OBJFWD (obj
)->offset
),
1897 printcharfun
, escapeflag
);
1901 case Lisp_Misc_Buffer_Local_Value
:
1902 strout ("#<buffer_local_value ", -1, -1, printcharfun
, 0);
1903 goto do_buffer_local
;
1904 case Lisp_Misc_Some_Buffer_Local_Value
:
1905 strout ("#<some_buffer_local_value ", -1, -1, printcharfun
, 0);
1907 strout ("[realvalue] ", -1, -1, printcharfun
, 0);
1908 print_object (XBUFFER_LOCAL_VALUE (obj
)->realvalue
,
1909 printcharfun
, escapeflag
);
1910 if (XBUFFER_LOCAL_VALUE (obj
)->found_for_buffer
)
1911 strout ("[local in buffer] ", -1, -1, printcharfun
, 0);
1913 strout ("[buffer] ", -1, -1, printcharfun
, 0);
1914 print_object (XBUFFER_LOCAL_VALUE (obj
)->buffer
,
1915 printcharfun
, escapeflag
);
1916 if (XBUFFER_LOCAL_VALUE (obj
)->check_frame
)
1918 if (XBUFFER_LOCAL_VALUE (obj
)->found_for_frame
)
1919 strout ("[local in frame] ", -1, -1, printcharfun
, 0);
1921 strout ("[frame] ", -1, -1, printcharfun
, 0);
1922 print_object (XBUFFER_LOCAL_VALUE (obj
)->frame
,
1923 printcharfun
, escapeflag
);
1925 strout ("[alist-elt] ", -1, -1, printcharfun
, 0);
1926 print_object (XCAR (XBUFFER_LOCAL_VALUE (obj
)->cdr
),
1927 printcharfun
, escapeflag
);
1928 strout ("[default-value] ", -1, -1, printcharfun
, 0);
1929 print_object (XCDR (XBUFFER_LOCAL_VALUE (obj
)->cdr
),
1930 printcharfun
, escapeflag
);
1942 /* We're in trouble if this happens!
1943 Probably should just abort () */
1944 strout ("#<EMACS BUG: INVALID DATATYPE ", -1, -1, printcharfun
, 0);
1946 sprintf (buf
, "(MISC 0x%04x)", (int) XMISCTYPE (obj
));
1947 else if (VECTORLIKEP (obj
))
1948 sprintf (buf
, "(PVEC 0x%08x)", (int) XVECTOR (obj
)->size
);
1950 sprintf (buf
, "(0x%02x)", (int) XTYPE (obj
));
1951 strout (buf
, -1, -1, printcharfun
, 0);
1952 strout (" Save your buffers immediately and please report this bug>",
1953 -1, -1, printcharfun
, 0);
1961 /* Print a description of INTERVAL using PRINTCHARFUN.
1962 This is part of printing a string that has text properties. */
1965 print_interval (interval
, printcharfun
)
1967 Lisp_Object printcharfun
;
1970 print_object (make_number (interval
->position
), printcharfun
, 1);
1972 print_object (make_number (interval
->position
+ LENGTH (interval
)),
1975 print_object (interval
->plist
, printcharfun
, 1);
1982 Qtemp_buffer_setup_hook
= intern ("temp-buffer-setup-hook");
1983 staticpro (&Qtemp_buffer_setup_hook
);
1985 DEFVAR_LISP ("standard-output", &Vstandard_output
,
1986 doc
: /* Output stream `print' uses by default for outputting a character.
1987 This may be any function of one argument.
1988 It may also be a buffer (output is inserted before point)
1989 or a marker (output is inserted and the marker is advanced)
1990 or the symbol t (output appears in the echo area). */);
1991 Vstandard_output
= Qt
;
1992 Qstandard_output
= intern ("standard-output");
1993 staticpro (&Qstandard_output
);
1995 DEFVAR_LISP ("float-output-format", &Vfloat_output_format
,
1996 doc
: /* The format descriptor string used to print floats.
1997 This is a %-spec like those accepted by `printf' in C,
1998 but with some restrictions. It must start with the two characters `%.'.
1999 After that comes an integer precision specification,
2000 and then a letter which controls the format.
2001 The letters allowed are `e', `f' and `g'.
2002 Use `e' for exponential notation \"DIG.DIGITSeEXPT\"
2003 Use `f' for decimal point notation \"DIGITS.DIGITS\".
2004 Use `g' to choose the shorter of those two formats for the number at hand.
2005 The precision in any of these cases is the number of digits following
2006 the decimal point. With `f', a precision of 0 means to omit the
2007 decimal point. 0 is not allowed with `e' or `g'.
2009 A value of nil means to use the shortest notation
2010 that represents the number without losing information. */);
2011 Vfloat_output_format
= Qnil
;
2012 Qfloat_output_format
= intern ("float-output-format");
2013 staticpro (&Qfloat_output_format
);
2015 DEFVAR_LISP ("print-length", &Vprint_length
,
2016 doc
: /* Maximum length of list to print before abbreviating.
2017 A value of nil means no limit. See also `eval-expression-print-length'. */);
2018 Vprint_length
= Qnil
;
2020 DEFVAR_LISP ("print-level", &Vprint_level
,
2021 doc
: /* Maximum depth of list nesting to print before abbreviating.
2022 A value of nil means no limit. See also `eval-expression-print-level'. */);
2023 Vprint_level
= Qnil
;
2025 DEFVAR_BOOL ("print-escape-newlines", &print_escape_newlines
,
2026 doc
: /* Non-nil means print newlines in strings as `\\n'.
2027 Also print formfeeds as `\\f'. */);
2028 print_escape_newlines
= 0;
2030 DEFVAR_BOOL ("print-escape-nonascii", &print_escape_nonascii
,
2031 doc
: /* Non-nil means print unibyte non-ASCII chars in strings as \\OOO.
2032 \(OOO is the octal representation of the character code.)
2033 Only single-byte characters are affected, and only in `prin1'. */);
2034 print_escape_nonascii
= 0;
2036 DEFVAR_BOOL ("print-escape-multibyte", &print_escape_multibyte
,
2037 doc
: /* Non-nil means print multibyte characters in strings as \\xXXXX.
2038 \(XXXX is the hex representation of the character code.)
2039 This affects only `prin1'. */);
2040 print_escape_multibyte
= 0;
2042 DEFVAR_BOOL ("print-quoted", &print_quoted
,
2043 doc
: /* Non-nil means print quoted forms with reader syntax.
2044 I.e., (quote foo) prints as 'foo, (function foo) as #'foo, and backquoted
2045 forms print as in the new syntax. */);
2048 DEFVAR_LISP ("print-gensym", &Vprint_gensym
,
2049 doc
: /* Non-nil means print uninterned symbols so they will read as uninterned.
2050 I.e., the value of (make-symbol \"foobar\") prints as #:foobar.
2051 When the uninterned symbol appears within a recursive data structure,
2052 and the symbol appears more than once, in addition use the #N# and #N=
2053 constructs as needed, so that multiple references to the same symbol are
2054 shared once again when the text is read back. */);
2055 Vprint_gensym
= Qnil
;
2057 DEFVAR_LISP ("print-circle", &Vprint_circle
,
2058 doc
: /* *Non-nil means print recursive structures using #N= and #N# syntax.
2059 If nil, printing proceeds recursively and may lead to
2060 `max-lisp-eval-depth' being exceeded or an error may occur:
2061 \"Apparently circular structure being printed.\" Also see
2062 `print-length' and `print-level'.
2063 If non-nil, shared substructures anywhere in the structure are printed
2064 with `#N=' before the first occurrence (in the order of the print
2065 representation) and `#N#' in place of each subsequent occurrence,
2066 where N is a positive decimal integer. */);
2067 Vprint_circle
= Qnil
;
2069 DEFVAR_LISP ("print-continuous-numbering", &Vprint_continuous_numbering
,
2070 doc
: /* *Non-nil means number continuously across print calls.
2071 This affects the numbers printed for #N= labels and #M# references.
2072 See also `print-circle', `print-gensym', and `print-number-table'.
2073 This variable should not be set with `setq'; bind it with a `let' instead. */);
2074 Vprint_continuous_numbering
= Qnil
;
2076 DEFVAR_LISP ("print-number-table", &Vprint_number_table
,
2077 doc
: /* A vector used internally to produce `#N=' labels and `#N#' references.
2078 The Lisp printer uses this vector to detect Lisp objects referenced more
2079 than once. When `print-continuous-numbering' is bound to t, you should
2080 probably also bind `print-number-table' to nil. This ensures that the
2081 value of `print-number-table' can be garbage-collected once the printing
2083 Vprint_number_table
= Qnil
;
2085 /* prin1_to_string_buffer initialized in init_buffer_once in buffer.c */
2086 staticpro (&Vprin1_to_string_buffer
);
2089 defsubr (&Sprin1_to_string
);
2090 defsubr (&Serror_message_string
);
2094 defsubr (&Swrite_char
);
2095 defsubr (&Sexternal_debugging_output
);
2097 Qexternal_debugging_output
= intern ("external-debugging-output");
2098 staticpro (&Qexternal_debugging_output
);
2100 Qprint_escape_newlines
= intern ("print-escape-newlines");
2101 staticpro (&Qprint_escape_newlines
);
2103 Qprint_escape_multibyte
= intern ("print-escape-multibyte");
2104 staticpro (&Qprint_escape_multibyte
);
2106 Qprint_escape_nonascii
= intern ("print-escape-nonascii");
2107 staticpro (&Qprint_escape_nonascii
);
2109 defsubr (&Swith_output_to_temp_buffer
);