Commit | Line | Data |
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38010d50 | 1 | /* Lisp object printing and output streams. |
7651e1f5 | 2 | Copyright (C) 1985, 1986, 1988, 1993 Free Software Foundation, Inc. |
38010d50 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
4746118a | 8 | the Free Software Foundation; either version 2, or (at your option) |
38010d50 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | ||
21 | #include "config.h" | |
22 | #include <stdio.h> | |
23 | #undef NULL | |
24 | #include "lisp.h" | |
25 | ||
26 | #ifndef standalone | |
27 | #include "buffer.h" | |
0137dbf7 | 28 | #include "frame.h" |
38010d50 JB |
29 | #include "window.h" |
30 | #include "process.h" | |
31 | #include "dispextern.h" | |
32 | #include "termchar.h" | |
33 | #endif /* not standalone */ | |
34 | ||
7651e1f5 RS |
35 | #ifdef USE_TEXT_PROPERTIES |
36 | #include "intervals.h" | |
37 | #endif | |
38 | ||
38010d50 JB |
39 | Lisp_Object Vstandard_output, Qstandard_output; |
40 | ||
41 | #ifdef LISP_FLOAT_TYPE | |
42 | Lisp_Object Vfloat_output_format, Qfloat_output_format; | |
43 | #endif /* LISP_FLOAT_TYPE */ | |
44 | ||
45 | /* Avoid actual stack overflow in print. */ | |
46 | int print_depth; | |
47 | ||
ec838c39 RS |
48 | /* Detect most circularities to print finite output. */ |
49 | #define PRINT_CIRCLE 200 | |
50 | Lisp_Object being_printed[PRINT_CIRCLE]; | |
51 | ||
38010d50 JB |
52 | /* Maximum length of list to print in full; noninteger means |
53 | effectively infinity */ | |
54 | ||
55 | Lisp_Object Vprint_length; | |
56 | ||
57 | /* Maximum depth of list to print in full; noninteger means | |
58 | effectively infinity. */ | |
59 | ||
60 | Lisp_Object Vprint_level; | |
61 | ||
62 | /* Nonzero means print newlines in strings as \n. */ | |
63 | ||
64 | int print_escape_newlines; | |
65 | ||
66 | Lisp_Object Qprint_escape_newlines; | |
67 | ||
68 | /* Nonzero means print newline before next minibuffer message. | |
69 | Defined in xdisp.c */ | |
70 | ||
71 | extern int noninteractive_need_newline; | |
72 | #ifdef MAX_PRINT_CHARS | |
73 | static int print_chars; | |
74 | static int max_print; | |
75 | #endif /* MAX_PRINT_CHARS */ | |
7651e1f5 RS |
76 | |
77 | void print_interval (); | |
38010d50 JB |
78 | \f |
79 | #if 0 | |
80 | /* Convert between chars and GLYPHs */ | |
81 | ||
82 | int | |
83 | glyphlen (glyphs) | |
84 | register GLYPH *glyphs; | |
85 | { | |
86 | register int i = 0; | |
87 | ||
88 | while (glyphs[i]) | |
89 | i++; | |
90 | return i; | |
91 | } | |
92 | ||
93 | void | |
94 | str_to_glyph_cpy (str, glyphs) | |
95 | char *str; | |
96 | GLYPH *glyphs; | |
97 | { | |
98 | register GLYPH *gp = glyphs; | |
99 | register char *cp = str; | |
100 | ||
101 | while (*cp) | |
102 | *gp++ = *cp++; | |
103 | } | |
104 | ||
105 | void | |
106 | str_to_glyph_ncpy (str, glyphs, n) | |
107 | char *str; | |
108 | GLYPH *glyphs; | |
109 | register int n; | |
110 | { | |
111 | register GLYPH *gp = glyphs; | |
112 | register char *cp = str; | |
113 | ||
114 | while (n-- > 0) | |
115 | *gp++ = *cp++; | |
116 | } | |
117 | ||
118 | void | |
119 | glyph_to_str_cpy (glyphs, str) | |
120 | GLYPH *glyphs; | |
121 | char *str; | |
122 | { | |
123 | register GLYPH *gp = glyphs; | |
124 | register char *cp = str; | |
125 | ||
126 | while (*gp) | |
127 | *str++ = *gp++ & 0377; | |
128 | } | |
129 | #endif | |
130 | \f | |
131 | /* Low level output routines for charaters and strings */ | |
132 | ||
133 | /* Lisp functions to do output using a stream | |
134 | must have the stream in a variable called printcharfun | |
135 | and must start with PRINTPREPARE and end with PRINTFINISH. | |
136 | Use PRINTCHAR to output one character, | |
137 | or call strout to output a block of characters. | |
138 | Also, each one must have the declarations | |
139 | struct buffer *old = current_buffer; | |
140 | int old_point = -1, start_point; | |
141 | Lisp_Object original; | |
142 | */ | |
143 | ||
cdaa87fd RS |
144 | #define PRINTPREPARE \ |
145 | original = printcharfun; \ | |
146 | if (NILP (printcharfun)) printcharfun = Qt; \ | |
147 | if (XTYPE (printcharfun) == Lisp_Buffer) \ | |
148 | { if (XBUFFER (printcharfun) != current_buffer) \ | |
149 | Fset_buffer (printcharfun); \ | |
150 | printcharfun = Qnil;} \ | |
151 | if (XTYPE (printcharfun) == Lisp_Marker) \ | |
152 | { if (!(XMARKER (original)->buffer)) \ | |
153 | error ("Marker does not point anywhere"); \ | |
154 | if (XMARKER (original)->buffer != current_buffer) \ | |
155 | set_buffer_internal (XMARKER (original)->buffer); \ | |
156 | old_point = point; \ | |
157 | SET_PT (marker_position (printcharfun)); \ | |
158 | start_point = point; \ | |
38010d50 JB |
159 | printcharfun = Qnil;} |
160 | ||
cdaa87fd RS |
161 | #define PRINTFINISH \ |
162 | if (XTYPE (original) == Lisp_Marker) \ | |
163 | Fset_marker (original, make_number (point), Qnil); \ | |
164 | if (old_point >= 0) \ | |
165 | SET_PT (old_point + (old_point >= start_point \ | |
166 | ? point - start_point : 0)); \ | |
167 | if (old != current_buffer) \ | |
38010d50 JB |
168 | set_buffer_internal (old) |
169 | ||
170 | #define PRINTCHAR(ch) printchar (ch, printcharfun) | |
171 | ||
0137dbf7 | 172 | /* Index of first unused element of FRAME_MESSAGE_BUF(selected_frame). */ |
38010d50 JB |
173 | static int printbufidx; |
174 | ||
175 | static void | |
176 | printchar (ch, fun) | |
177 | unsigned char ch; | |
178 | Lisp_Object fun; | |
179 | { | |
180 | Lisp_Object ch1; | |
181 | ||
182 | #ifdef MAX_PRINT_CHARS | |
183 | if (max_print) | |
184 | print_chars++; | |
185 | #endif /* MAX_PRINT_CHARS */ | |
186 | #ifndef standalone | |
187 | if (EQ (fun, Qnil)) | |
188 | { | |
189 | QUIT; | |
190 | insert (&ch, 1); | |
191 | return; | |
192 | } | |
193 | ||
194 | if (EQ (fun, Qt)) | |
195 | { | |
196 | if (noninteractive) | |
197 | { | |
198 | putchar (ch); | |
199 | noninteractive_need_newline = 1; | |
200 | return; | |
201 | } | |
202 | ||
0137dbf7 | 203 | if (echo_area_glyphs != FRAME_MESSAGE_BUF (selected_frame) |
38010d50 JB |
204 | || !message_buf_print) |
205 | { | |
0137dbf7 | 206 | echo_area_glyphs = FRAME_MESSAGE_BUF (selected_frame); |
38010d50 JB |
207 | printbufidx = 0; |
208 | message_buf_print = 1; | |
209 | } | |
210 | ||
0137dbf7 JB |
211 | if (printbufidx < FRAME_WIDTH (selected_frame) - 1) |
212 | FRAME_MESSAGE_BUF (selected_frame)[printbufidx++] = ch; | |
213 | FRAME_MESSAGE_BUF (selected_frame)[printbufidx] = 0; | |
38010d50 JB |
214 | |
215 | return; | |
216 | } | |
217 | #endif /* not standalone */ | |
218 | ||
219 | XFASTINT (ch1) = ch; | |
220 | call1 (fun, ch1); | |
221 | } | |
222 | ||
223 | static void | |
224 | strout (ptr, size, printcharfun) | |
225 | char *ptr; | |
226 | int size; | |
227 | Lisp_Object printcharfun; | |
228 | { | |
229 | int i = 0; | |
230 | ||
231 | if (EQ (printcharfun, Qnil)) | |
232 | { | |
233 | insert (ptr, size >= 0 ? size : strlen (ptr)); | |
234 | #ifdef MAX_PRINT_CHARS | |
235 | if (max_print) | |
236 | print_chars += size >= 0 ? size : strlen(ptr); | |
237 | #endif /* MAX_PRINT_CHARS */ | |
238 | return; | |
239 | } | |
240 | if (EQ (printcharfun, Qt)) | |
241 | { | |
242 | i = size >= 0 ? size : strlen (ptr); | |
243 | #ifdef MAX_PRINT_CHARS | |
244 | if (max_print) | |
245 | print_chars += i; | |
246 | #endif /* MAX_PRINT_CHARS */ | |
247 | ||
248 | if (noninteractive) | |
249 | { | |
250 | fwrite (ptr, 1, i, stdout); | |
251 | noninteractive_need_newline = 1; | |
252 | return; | |
253 | } | |
254 | ||
0137dbf7 | 255 | if (echo_area_glyphs != FRAME_MESSAGE_BUF (selected_frame) |
38010d50 JB |
256 | || !message_buf_print) |
257 | { | |
0137dbf7 | 258 | echo_area_glyphs = FRAME_MESSAGE_BUF (selected_frame); |
38010d50 JB |
259 | printbufidx = 0; |
260 | message_buf_print = 1; | |
261 | } | |
262 | ||
0137dbf7 JB |
263 | if (i > FRAME_WIDTH (selected_frame) - printbufidx - 1) |
264 | i = FRAME_WIDTH (selected_frame) - printbufidx - 1; | |
265 | bcopy (ptr, &FRAME_MESSAGE_BUF (selected_frame) [printbufidx], i); | |
38010d50 | 266 | printbufidx += i; |
0137dbf7 | 267 | FRAME_MESSAGE_BUF (selected_frame) [printbufidx] = 0; |
38010d50 JB |
268 | |
269 | return; | |
270 | } | |
271 | ||
272 | if (size >= 0) | |
273 | while (i < size) | |
274 | PRINTCHAR (ptr[i++]); | |
275 | else | |
276 | while (ptr[i]) | |
277 | PRINTCHAR (ptr[i++]); | |
278 | } | |
279 | ||
280 | /* Print the contents of a string STRING using PRINTCHARFUN. | |
281 | It isn't safe to use strout, because printing one char can relocate. */ | |
282 | ||
283 | print_string (string, printcharfun) | |
284 | Lisp_Object string; | |
285 | Lisp_Object printcharfun; | |
286 | { | |
287 | if (EQ (printcharfun, Qnil) || EQ (printcharfun, Qt)) | |
0137dbf7 | 288 | /* In predictable cases, strout is safe: output to buffer or frame. */ |
38010d50 JB |
289 | strout (XSTRING (string)->data, XSTRING (string)->size, printcharfun); |
290 | else | |
291 | { | |
292 | /* Otherwise, fetch the string address for each character. */ | |
293 | int i; | |
294 | int size = XSTRING (string)->size; | |
295 | struct gcpro gcpro1; | |
296 | GCPRO1 (string); | |
297 | for (i = 0; i < size; i++) | |
298 | PRINTCHAR (XSTRING (string)->data[i]); | |
299 | UNGCPRO; | |
300 | } | |
301 | } | |
302 | \f | |
303 | DEFUN ("write-char", Fwrite_char, Swrite_char, 1, 2, 0, | |
304 | "Output character CHAR to stream STREAM.\n\ | |
305 | STREAM defaults to the value of `standard-output' (which see).") | |
306 | (ch, printcharfun) | |
307 | Lisp_Object ch, printcharfun; | |
308 | { | |
309 | struct buffer *old = current_buffer; | |
310 | int old_point = -1; | |
311 | int start_point; | |
312 | Lisp_Object original; | |
313 | ||
10eebdbb | 314 | if (NILP (printcharfun)) |
38010d50 JB |
315 | printcharfun = Vstandard_output; |
316 | CHECK_NUMBER (ch, 0); | |
317 | PRINTPREPARE; | |
318 | PRINTCHAR (XINT (ch)); | |
319 | PRINTFINISH; | |
320 | return ch; | |
321 | } | |
322 | ||
323 | /* Used from outside of print.c to print a block of SIZE chars at DATA | |
324 | on the default output stream. | |
325 | Do not use this on the contents of a Lisp string. */ | |
326 | ||
327 | write_string (data, size) | |
328 | char *data; | |
329 | int size; | |
330 | { | |
331 | struct buffer *old = current_buffer; | |
332 | Lisp_Object printcharfun; | |
333 | int old_point = -1; | |
334 | int start_point; | |
335 | Lisp_Object original; | |
336 | ||
337 | printcharfun = Vstandard_output; | |
338 | ||
339 | PRINTPREPARE; | |
340 | strout (data, size, printcharfun); | |
341 | PRINTFINISH; | |
342 | } | |
343 | ||
344 | /* Used from outside of print.c to print a block of SIZE chars at DATA | |
345 | on a specified stream PRINTCHARFUN. | |
346 | Do not use this on the contents of a Lisp string. */ | |
347 | ||
348 | write_string_1 (data, size, printcharfun) | |
349 | char *data; | |
350 | int size; | |
351 | Lisp_Object printcharfun; | |
352 | { | |
353 | struct buffer *old = current_buffer; | |
354 | int old_point = -1; | |
355 | int start_point; | |
356 | Lisp_Object original; | |
357 | ||
358 | PRINTPREPARE; | |
359 | strout (data, size, printcharfun); | |
360 | PRINTFINISH; | |
361 | } | |
362 | ||
363 | ||
364 | #ifndef standalone | |
365 | ||
366 | void | |
367 | temp_output_buffer_setup (bufname) | |
368 | char *bufname; | |
369 | { | |
370 | register struct buffer *old = current_buffer; | |
371 | register Lisp_Object buf; | |
372 | ||
373 | Fset_buffer (Fget_buffer_create (build_string (bufname))); | |
374 | ||
375 | current_buffer->read_only = Qnil; | |
376 | Ferase_buffer (); | |
377 | ||
378 | XSET (buf, Lisp_Buffer, current_buffer); | |
379 | specbind (Qstandard_output, buf); | |
380 | ||
381 | set_buffer_internal (old); | |
382 | } | |
383 | ||
384 | Lisp_Object | |
385 | internal_with_output_to_temp_buffer (bufname, function, args) | |
386 | char *bufname; | |
387 | Lisp_Object (*function) (); | |
388 | Lisp_Object args; | |
389 | { | |
390 | int count = specpdl_ptr - specpdl; | |
391 | Lisp_Object buf, val; | |
392 | ||
393 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
394 | temp_output_buffer_setup (bufname); | |
395 | buf = Vstandard_output; | |
396 | ||
397 | val = (*function) (args); | |
398 | ||
399 | temp_output_buffer_show (buf); | |
400 | ||
401 | return unbind_to (count, val); | |
402 | } | |
403 | ||
404 | DEFUN ("with-output-to-temp-buffer", Fwith_output_to_temp_buffer, Swith_output_to_temp_buffer, | |
405 | 1, UNEVALLED, 0, | |
406 | "Bind `standard-output' to buffer BUFNAME, eval BODY, then show that buffer.\n\ | |
407 | The buffer is cleared out initially, and marked as unmodified when done.\n\ | |
408 | All output done by BODY is inserted in that buffer by default.\n\ | |
409 | The buffer is displayed in another window, but not selected.\n\ | |
410 | The value of the last form in BODY is returned.\n\ | |
411 | If BODY does not finish normally, the buffer BUFNAME is not displayed.\n\n\ | |
483288d7 | 412 | If variable `temp-buffer-show-function' is non-nil, call it at the end\n\ |
38010d50 JB |
413 | to get the buffer displayed. It gets one argument, the buffer to display.") |
414 | (args) | |
415 | Lisp_Object args; | |
416 | { | |
417 | struct gcpro gcpro1; | |
418 | Lisp_Object name; | |
419 | int count = specpdl_ptr - specpdl; | |
420 | Lisp_Object buf, val; | |
421 | ||
422 | GCPRO1(args); | |
423 | name = Feval (Fcar (args)); | |
424 | UNGCPRO; | |
425 | ||
426 | CHECK_STRING (name, 0); | |
427 | temp_output_buffer_setup (XSTRING (name)->data); | |
428 | buf = Vstandard_output; | |
429 | ||
430 | val = Fprogn (Fcdr (args)); | |
431 | ||
432 | temp_output_buffer_show (buf); | |
433 | ||
434 | return unbind_to (count, val); | |
435 | } | |
436 | #endif /* not standalone */ | |
437 | \f | |
438 | static void print (); | |
439 | ||
440 | DEFUN ("terpri", Fterpri, Sterpri, 0, 1, 0, | |
441 | "Output a newline to STREAM.\n\ | |
442 | If STREAM is omitted or nil, the value of `standard-output' is used.") | |
443 | (printcharfun) | |
444 | Lisp_Object printcharfun; | |
445 | { | |
446 | struct buffer *old = current_buffer; | |
447 | int old_point = -1; | |
448 | int start_point; | |
449 | Lisp_Object original; | |
450 | ||
10eebdbb | 451 | if (NILP (printcharfun)) |
38010d50 JB |
452 | printcharfun = Vstandard_output; |
453 | PRINTPREPARE; | |
454 | PRINTCHAR ('\n'); | |
455 | PRINTFINISH; | |
456 | return Qt; | |
457 | } | |
458 | ||
459 | DEFUN ("prin1", Fprin1, Sprin1, 1, 2, 0, | |
460 | "Output the printed representation of OBJECT, any Lisp object.\n\ | |
461 | Quoting characters are printed when needed to make output that `read'\n\ | |
462 | can handle, whenever this is possible.\n\ | |
463 | Output stream is STREAM, or value of `standard-output' (which see).") | |
464 | (obj, printcharfun) | |
465 | Lisp_Object obj, printcharfun; | |
466 | { | |
467 | struct buffer *old = current_buffer; | |
468 | int old_point = -1; | |
469 | int start_point; | |
470 | Lisp_Object original; | |
471 | ||
472 | #ifdef MAX_PRINT_CHARS | |
473 | max_print = 0; | |
474 | #endif /* MAX_PRINT_CHARS */ | |
10eebdbb | 475 | if (NILP (printcharfun)) |
38010d50 JB |
476 | printcharfun = Vstandard_output; |
477 | PRINTPREPARE; | |
478 | print_depth = 0; | |
479 | print (obj, printcharfun, 1); | |
480 | PRINTFINISH; | |
481 | return obj; | |
482 | } | |
483 | ||
484 | /* a buffer which is used to hold output being built by prin1-to-string */ | |
485 | Lisp_Object Vprin1_to_string_buffer; | |
486 | ||
487 | DEFUN ("prin1-to-string", Fprin1_to_string, Sprin1_to_string, 1, 2, 0, | |
488 | "Return a string containing the printed representation of OBJECT,\n\ | |
489 | any Lisp object. Quoting characters are used when needed to make output\n\ | |
490 | that `read' can handle, whenever this is possible, unless the optional\n\ | |
491 | second argument NOESCAPE is non-nil.") | |
492 | (obj, noescape) | |
493 | Lisp_Object obj, noescape; | |
494 | { | |
495 | struct buffer *old = current_buffer; | |
496 | int old_point = -1; | |
497 | int start_point; | |
498 | Lisp_Object original, printcharfun; | |
499 | struct gcpro gcpro1; | |
500 | ||
501 | printcharfun = Vprin1_to_string_buffer; | |
502 | PRINTPREPARE; | |
503 | print_depth = 0; | |
10eebdbb | 504 | print (obj, printcharfun, NILP (noescape)); |
38010d50 JB |
505 | /* Make Vprin1_to_string_buffer be the default buffer after PRINTFINSH */ |
506 | PRINTFINISH; | |
507 | set_buffer_internal (XBUFFER (Vprin1_to_string_buffer)); | |
508 | obj = Fbuffer_string (); | |
509 | ||
510 | GCPRO1 (obj); | |
511 | Ferase_buffer (); | |
512 | set_buffer_internal (old); | |
513 | UNGCPRO; | |
514 | ||
515 | return obj; | |
516 | } | |
517 | ||
518 | DEFUN ("princ", Fprinc, Sprinc, 1, 2, 0, | |
519 | "Output the printed representation of OBJECT, any Lisp object.\n\ | |
520 | No quoting characters are used; no delimiters are printed around\n\ | |
521 | the contents of strings.\n\ | |
522 | Output stream is STREAM, or value of standard-output (which see).") | |
523 | (obj, printcharfun) | |
524 | Lisp_Object obj, printcharfun; | |
525 | { | |
526 | struct buffer *old = current_buffer; | |
527 | int old_point = -1; | |
528 | int start_point; | |
529 | Lisp_Object original; | |
530 | ||
10eebdbb | 531 | if (NILP (printcharfun)) |
38010d50 JB |
532 | printcharfun = Vstandard_output; |
533 | PRINTPREPARE; | |
534 | print_depth = 0; | |
535 | print (obj, printcharfun, 0); | |
536 | PRINTFINISH; | |
537 | return obj; | |
538 | } | |
539 | ||
540 | DEFUN ("print", Fprint, Sprint, 1, 2, 0, | |
541 | "Output the printed representation of OBJECT, with newlines around it.\n\ | |
542 | Quoting characters are printed when needed to make output that `read'\n\ | |
543 | can handle, whenever this is possible.\n\ | |
544 | Output stream is STREAM, or value of `standard-output' (which see).") | |
545 | (obj, printcharfun) | |
546 | Lisp_Object obj, printcharfun; | |
547 | { | |
548 | struct buffer *old = current_buffer; | |
549 | int old_point = -1; | |
550 | int start_point; | |
551 | Lisp_Object original; | |
552 | struct gcpro gcpro1; | |
553 | ||
554 | #ifdef MAX_PRINT_CHARS | |
555 | print_chars = 0; | |
556 | max_print = MAX_PRINT_CHARS; | |
557 | #endif /* MAX_PRINT_CHARS */ | |
10eebdbb | 558 | if (NILP (printcharfun)) |
38010d50 JB |
559 | printcharfun = Vstandard_output; |
560 | GCPRO1 (obj); | |
561 | PRINTPREPARE; | |
562 | print_depth = 0; | |
563 | PRINTCHAR ('\n'); | |
564 | print (obj, printcharfun, 1); | |
565 | PRINTCHAR ('\n'); | |
566 | PRINTFINISH; | |
567 | #ifdef MAX_PRINT_CHARS | |
568 | max_print = 0; | |
569 | print_chars = 0; | |
570 | #endif /* MAX_PRINT_CHARS */ | |
571 | UNGCPRO; | |
572 | return obj; | |
573 | } | |
574 | ||
575 | /* The subroutine object for external-debugging-output is kept here | |
576 | for the convenience of the debugger. */ | |
577 | Lisp_Object Qexternal_debugging_output; | |
578 | ||
4746118a JB |
579 | DEFUN ("external-debugging-output", Fexternal_debugging_output, Sexternal_debugging_output, 1, 1, 0, |
580 | "Write CHARACTER to stderr.\n\ | |
38010d50 JB |
581 | You can call print while debugging emacs, and pass it this function\n\ |
582 | to make it write to the debugging output.\n") | |
4746118a JB |
583 | (character) |
584 | Lisp_Object character; | |
38010d50 JB |
585 | { |
586 | CHECK_NUMBER (character, 0); | |
587 | putc (XINT (character), stderr); | |
588 | ||
589 | return character; | |
590 | } | |
591 | \f | |
592 | #ifdef LISP_FLOAT_TYPE | |
593 | ||
38010d50 | 594 | /* |
edb2a707 | 595 | * The buffer should be at least as large as the max string size of the |
38010d50 JB |
596 | * largest float, printed in the biggest notation. This is undoubtably |
597 | * 20d float_output_format, with the negative of the C-constant "HUGE" | |
598 | * from <math.h>. | |
599 | * | |
600 | * On the vax the worst case is -1e38 in 20d format which takes 61 bytes. | |
601 | * | |
602 | * I assume that IEEE-754 format numbers can take 329 bytes for the worst | |
603 | * case of -1e307 in 20d float_output_format. What is one to do (short of | |
604 | * re-writing _doprnt to be more sane)? | |
605 | * -wsr | |
606 | */ | |
edb2a707 RS |
607 | |
608 | void | |
609 | float_to_string (buf, data) | |
8b24d146 | 610 | unsigned char *buf; |
38010d50 JB |
611 | double data; |
612 | { | |
613 | register unsigned char *cp, c; | |
614 | register int width; | |
615 | ||
10eebdbb | 616 | if (NILP (Vfloat_output_format) |
38010d50 JB |
617 | || XTYPE (Vfloat_output_format) != Lisp_String) |
618 | lose: | |
619 | sprintf (buf, "%.20g", data); | |
620 | else /* oink oink */ | |
621 | { | |
622 | /* Check that the spec we have is fully valid. | |
623 | This means not only valid for printf, | |
624 | but meant for floats, and reasonable. */ | |
625 | cp = XSTRING (Vfloat_output_format)->data; | |
626 | ||
627 | if (cp[0] != '%') | |
628 | goto lose; | |
629 | if (cp[1] != '.') | |
630 | goto lose; | |
631 | ||
632 | cp += 2; | |
633 | for (width = 0; | |
634 | ((c = *cp) >= '0' && c <= '9'); | |
635 | cp++) | |
636 | { | |
637 | width *= 10; | |
638 | width += c - '0'; | |
639 | } | |
640 | ||
641 | if (*cp != 'e' && *cp != 'f' && *cp != 'g') | |
642 | goto lose; | |
643 | ||
644 | if (width < (*cp != 'e') || width > DBL_DIG) | |
645 | goto lose; | |
646 | ||
647 | if (cp[1] != 0) | |
648 | goto lose; | |
649 | ||
650 | sprintf (buf, XSTRING (Vfloat_output_format)->data, data); | |
651 | } | |
edb2a707 | 652 | |
0601fd3d | 653 | /* Make sure there is a decimal point with digit after, or an exponent, |
edb2a707 RS |
654 | so that the value is readable as a float. */ |
655 | for (cp = buf; *cp; cp++) | |
348d4dd6 | 656 | if ((*cp < '0' || *cp > '9') && *cp != '-') |
edb2a707 RS |
657 | break; |
658 | ||
0601fd3d RS |
659 | if (*cp == '.' && cp[1] == 0) |
660 | { | |
661 | cp[1] = '0'; | |
662 | cp[2] = 0; | |
663 | } | |
664 | ||
edb2a707 RS |
665 | if (*cp == 0) |
666 | { | |
667 | *cp++ = '.'; | |
668 | *cp++ = '0'; | |
669 | *cp++ = 0; | |
670 | } | |
38010d50 JB |
671 | } |
672 | #endif /* LISP_FLOAT_TYPE */ | |
673 | \f | |
674 | static void | |
675 | print (obj, printcharfun, escapeflag) | |
38010d50 | 676 | Lisp_Object obj; |
38010d50 JB |
677 | register Lisp_Object printcharfun; |
678 | int escapeflag; | |
679 | { | |
680 | char buf[30]; | |
681 | ||
682 | QUIT; | |
683 | ||
ec838c39 RS |
684 | #if 1 /* I'm not sure this is really worth doing. */ |
685 | /* Detect circularities and truncate them. | |
686 | No need to offer any alternative--this is better than an error. */ | |
687 | if (XTYPE (obj) == Lisp_Cons || XTYPE (obj) == Lisp_Vector | |
688 | || XTYPE (obj) == Lisp_Compiled) | |
689 | { | |
690 | int i; | |
691 | for (i = 0; i < print_depth; i++) | |
692 | if (EQ (obj, being_printed[i])) | |
693 | { | |
694 | sprintf (buf, "#%d", i); | |
695 | strout (buf, -1, printcharfun); | |
696 | return; | |
697 | } | |
698 | } | |
699 | #endif | |
700 | ||
701 | being_printed[print_depth] = obj; | |
38010d50 JB |
702 | print_depth++; |
703 | ||
ec838c39 | 704 | if (print_depth > PRINT_CIRCLE) |
38010d50 JB |
705 | error ("Apparently circular structure being printed"); |
706 | #ifdef MAX_PRINT_CHARS | |
707 | if (max_print && print_chars > max_print) | |
708 | { | |
709 | PRINTCHAR ('\n'); | |
710 | print_chars = 0; | |
711 | } | |
712 | #endif /* MAX_PRINT_CHARS */ | |
713 | ||
714 | #ifdef SWITCH_ENUM_BUG | |
715 | switch ((int) XTYPE (obj)) | |
716 | #else | |
717 | switch (XTYPE (obj)) | |
718 | #endif | |
719 | { | |
720 | default: | |
721 | /* We're in trouble if this happens! | |
722 | Probably should just abort () */ | |
723 | strout ("#<EMACS BUG: INVALID DATATYPE ", -1, printcharfun); | |
724 | sprintf (buf, "(#o%3o)", (int) XTYPE (obj)); | |
725 | strout (buf, -1, printcharfun); | |
726 | strout (" Save your buffers immediately and please report this bug>", | |
727 | -1, printcharfun); | |
728 | break; | |
729 | ||
730 | #ifdef LISP_FLOAT_TYPE | |
731 | case Lisp_Float: | |
732 | { | |
733 | char pigbuf[350]; /* see comments in float_to_string */ | |
734 | ||
735 | float_to_string (pigbuf, XFLOAT(obj)->data); | |
736 | strout (pigbuf, -1, printcharfun); | |
737 | } | |
738 | break; | |
739 | #endif /* LISP_FLOAT_TYPE */ | |
740 | ||
741 | case Lisp_Int: | |
742 | sprintf (buf, "%d", XINT (obj)); | |
743 | strout (buf, -1, printcharfun); | |
744 | break; | |
745 | ||
746 | case Lisp_String: | |
747 | if (!escapeflag) | |
748 | print_string (obj, printcharfun); | |
749 | else | |
750 | { | |
751 | register int i; | |
752 | register unsigned char c; | |
38010d50 JB |
753 | struct gcpro gcpro1; |
754 | ||
7651e1f5 RS |
755 | GCPRO1 (obj); |
756 | ||
757 | #ifdef USE_TEXT_PROPERTIES | |
758 | if (!NULL_INTERVAL_P (XSTRING (obj)->intervals)) | |
759 | { | |
760 | PRINTCHAR ('#'); | |
761 | PRINTCHAR ('('); | |
762 | } | |
763 | #endif | |
38010d50 JB |
764 | |
765 | PRINTCHAR ('\"'); | |
766 | for (i = 0; i < XSTRING (obj)->size; i++) | |
767 | { | |
768 | QUIT; | |
769 | c = XSTRING (obj)->data[i]; | |
770 | if (c == '\n' && print_escape_newlines) | |
771 | { | |
772 | PRINTCHAR ('\\'); | |
773 | PRINTCHAR ('n'); | |
774 | } | |
775 | else | |
776 | { | |
777 | if (c == '\"' || c == '\\') | |
778 | PRINTCHAR ('\\'); | |
779 | PRINTCHAR (c); | |
780 | } | |
781 | } | |
782 | PRINTCHAR ('\"'); | |
7651e1f5 RS |
783 | |
784 | #ifdef USE_TEXT_PROPERTIES | |
785 | if (!NULL_INTERVAL_P (XSTRING (obj)->intervals)) | |
786 | { | |
787 | PRINTCHAR (' '); | |
788 | traverse_intervals (XSTRING (obj)->intervals, | |
789 | 0, 0, print_interval, printcharfun); | |
790 | PRINTCHAR (')'); | |
791 | } | |
792 | #endif | |
793 | ||
38010d50 JB |
794 | UNGCPRO; |
795 | } | |
796 | break; | |
797 | ||
798 | case Lisp_Symbol: | |
799 | { | |
800 | register int confusing; | |
801 | register unsigned char *p = XSYMBOL (obj)->name->data; | |
802 | register unsigned char *end = p + XSYMBOL (obj)->name->size; | |
803 | register unsigned char c; | |
804 | ||
805 | if (p != end && (*p == '-' || *p == '+')) p++; | |
806 | if (p == end) | |
807 | confusing = 0; | |
808 | else | |
809 | { | |
810 | while (p != end && *p >= '0' && *p <= '9') | |
811 | p++; | |
812 | confusing = (end == p); | |
813 | } | |
814 | ||
815 | p = XSYMBOL (obj)->name->data; | |
816 | while (p != end) | |
817 | { | |
818 | QUIT; | |
819 | c = *p++; | |
820 | if (escapeflag) | |
821 | { | |
822 | if (c == '\"' || c == '\\' || c == '\'' || c == ';' || c == '#' || | |
823 | c == '(' || c == ')' || c == ',' || c =='.' || c == '`' || | |
824 | c == '[' || c == ']' || c == '?' || c <= 040 || confusing) | |
825 | PRINTCHAR ('\\'), confusing = 0; | |
826 | } | |
827 | PRINTCHAR (c); | |
828 | } | |
829 | } | |
830 | break; | |
831 | ||
832 | case Lisp_Cons: | |
833 | /* If deeper than spec'd depth, print placeholder. */ | |
834 | if (XTYPE (Vprint_level) == Lisp_Int | |
835 | && print_depth > XINT (Vprint_level)) | |
836 | { | |
837 | strout ("...", -1, printcharfun); | |
838 | break; | |
839 | } | |
840 | ||
841 | PRINTCHAR ('('); | |
842 | { | |
843 | register int i = 0; | |
844 | register int max = 0; | |
845 | ||
846 | if (XTYPE (Vprint_length) == Lisp_Int) | |
847 | max = XINT (Vprint_length); | |
ec838c39 RS |
848 | /* Could recognize circularities in cdrs here, |
849 | but that would make printing of long lists quadratic. | |
850 | It's not worth doing. */ | |
38010d50 JB |
851 | while (CONSP (obj)) |
852 | { | |
853 | if (i++) | |
854 | PRINTCHAR (' '); | |
855 | if (max && i > max) | |
856 | { | |
857 | strout ("...", 3, printcharfun); | |
858 | break; | |
859 | } | |
860 | print (Fcar (obj), printcharfun, escapeflag); | |
861 | obj = Fcdr (obj); | |
862 | } | |
863 | } | |
10eebdbb | 864 | if (!NILP (obj) && !CONSP (obj)) |
38010d50 JB |
865 | { |
866 | strout (" . ", 3, printcharfun); | |
867 | print (obj, printcharfun, escapeflag); | |
868 | } | |
869 | PRINTCHAR (')'); | |
870 | break; | |
871 | ||
872 | case Lisp_Compiled: | |
200f684e | 873 | strout ("#", -1, printcharfun); |
38010d50 JB |
874 | case Lisp_Vector: |
875 | PRINTCHAR ('['); | |
876 | { | |
877 | register int i; | |
878 | register Lisp_Object tem; | |
879 | for (i = 0; i < XVECTOR (obj)->size; i++) | |
880 | { | |
881 | if (i) PRINTCHAR (' '); | |
882 | tem = XVECTOR (obj)->contents[i]; | |
883 | print (tem, printcharfun, escapeflag); | |
884 | } | |
885 | } | |
886 | PRINTCHAR (']'); | |
38010d50 JB |
887 | break; |
888 | ||
889 | #ifndef standalone | |
890 | case Lisp_Buffer: | |
10eebdbb | 891 | if (NILP (XBUFFER (obj)->name)) |
38010d50 JB |
892 | strout ("#<killed buffer>", -1, printcharfun); |
893 | else if (escapeflag) | |
894 | { | |
895 | strout ("#<buffer ", -1, printcharfun); | |
896 | print_string (XBUFFER (obj)->name, printcharfun); | |
897 | PRINTCHAR ('>'); | |
898 | } | |
899 | else | |
900 | print_string (XBUFFER (obj)->name, printcharfun); | |
901 | break; | |
902 | ||
903 | case Lisp_Process: | |
904 | if (escapeflag) | |
905 | { | |
906 | strout ("#<process ", -1, printcharfun); | |
907 | print_string (XPROCESS (obj)->name, printcharfun); | |
908 | PRINTCHAR ('>'); | |
909 | } | |
910 | else | |
911 | print_string (XPROCESS (obj)->name, printcharfun); | |
912 | break; | |
913 | ||
914 | case Lisp_Window: | |
915 | strout ("#<window ", -1, printcharfun); | |
916 | sprintf (buf, "%d", XFASTINT (XWINDOW (obj)->sequence_number)); | |
917 | strout (buf, -1, printcharfun); | |
10eebdbb | 918 | if (!NILP (XWINDOW (obj)->buffer)) |
38010d50 JB |
919 | { |
920 | strout (" on ", -1, printcharfun); | |
921 | print_string (XBUFFER (XWINDOW (obj)->buffer)->name, printcharfun); | |
922 | } | |
923 | PRINTCHAR ('>'); | |
924 | break; | |
925 | ||
926 | case Lisp_Window_Configuration: | |
927 | strout ("#<window-configuration>", -1, printcharfun); | |
928 | break; | |
929 | ||
0137dbf7 JB |
930 | #ifdef MULTI_FRAME |
931 | case Lisp_Frame: | |
932 | strout ((FRAME_LIVE_P (XFRAME (obj)) | |
933 | ? "#<frame " : "#<dead frame "), | |
42dcdd5f | 934 | -1, printcharfun); |
0137dbf7 | 935 | print_string (XFRAME (obj)->name, printcharfun); |
8caf6c73 | 936 | sprintf (buf, " 0x%x", (unsigned int) (XFRAME (obj))); |
38010d50 JB |
937 | strout (buf, -1, printcharfun); |
938 | strout (">", -1, printcharfun); | |
939 | break; | |
0137dbf7 | 940 | #endif /* MULTI_FRAME */ |
38010d50 JB |
941 | |
942 | case Lisp_Marker: | |
943 | strout ("#<marker ", -1, printcharfun); | |
944 | if (!(XMARKER (obj)->buffer)) | |
945 | strout ("in no buffer", -1, printcharfun); | |
946 | else | |
947 | { | |
948 | sprintf (buf, "at %d", marker_position (obj)); | |
949 | strout (buf, -1, printcharfun); | |
950 | strout (" in ", -1, printcharfun); | |
951 | print_string (XMARKER (obj)->buffer->name, printcharfun); | |
952 | } | |
953 | PRINTCHAR ('>'); | |
954 | break; | |
6c523803 JB |
955 | |
956 | case Lisp_Overlay: | |
957 | strout ("#<overlay ", -1, printcharfun); | |
958 | if (!(XMARKER (OVERLAY_START (obj))->buffer)) | |
959 | strout ("in no buffer", -1, printcharfun); | |
960 | else | |
961 | { | |
962 | sprintf (buf, "from %d to %d in ", | |
963 | marker_position (OVERLAY_START (obj)), | |
964 | marker_position (OVERLAY_END (obj))); | |
965 | strout (buf, -1, printcharfun); | |
966 | print_string (XMARKER (OVERLAY_START (obj))->buffer->name, | |
967 | printcharfun); | |
968 | } | |
969 | PRINTCHAR ('>'); | |
970 | break; | |
971 | ||
38010d50 JB |
972 | #endif /* standalone */ |
973 | ||
974 | case Lisp_Subr: | |
975 | strout ("#<subr ", -1, printcharfun); | |
976 | strout (XSUBR (obj)->symbol_name, -1, printcharfun); | |
977 | PRINTCHAR ('>'); | |
978 | break; | |
979 | } | |
980 | ||
981 | print_depth--; | |
982 | } | |
983 | \f | |
7651e1f5 RS |
984 | #ifdef USE_TEXT_PROPERTIES |
985 | ||
986 | /* Print a description of INTERVAL using PRINTCHARFUN. | |
987 | This is part of printing a string that has text properties. */ | |
988 | ||
989 | void | |
990 | print_interval (interval, printcharfun) | |
991 | INTERVAL interval; | |
992 | Lisp_Object printcharfun; | |
993 | { | |
994 | print (make_number (interval->position), printcharfun, 1); | |
995 | PRINTCHAR (' '); | |
996 | print (make_number (interval->position + LENGTH (interval)), | |
997 | printcharfun, 1); | |
998 | PRINTCHAR (' '); | |
999 | print (interval->plist, printcharfun, 1); | |
1000 | PRINTCHAR (' '); | |
1001 | } | |
1002 | ||
1003 | #endif /* USE_TEXT_PROPERTIES */ | |
1004 | \f | |
38010d50 JB |
1005 | void |
1006 | syms_of_print () | |
1007 | { | |
1008 | staticpro (&Qprint_escape_newlines); | |
1009 | Qprint_escape_newlines = intern ("print-escape-newlines"); | |
1010 | ||
1011 | DEFVAR_LISP ("standard-output", &Vstandard_output, | |
1012 | "Output stream `print' uses by default for outputting a character.\n\ | |
1013 | This may be any function of one argument.\n\ | |
1014 | It may also be a buffer (output is inserted before point)\n\ | |
1015 | or a marker (output is inserted and the marker is advanced)\n\ | |
1016 | or the symbol t (output appears in the minibuffer line)."); | |
1017 | Vstandard_output = Qt; | |
1018 | Qstandard_output = intern ("standard-output"); | |
1019 | staticpro (&Qstandard_output); | |
1020 | ||
1021 | #ifdef LISP_FLOAT_TYPE | |
1022 | DEFVAR_LISP ("float-output-format", &Vfloat_output_format, | |
06ef7355 | 1023 | "The format descriptor string used to print floats.\n\ |
38010d50 JB |
1024 | This is a %-spec like those accepted by `printf' in C,\n\ |
1025 | but with some restrictions. It must start with the two characters `%.'.\n\ | |
1026 | After that comes an integer precision specification,\n\ | |
1027 | and then a letter which controls the format.\n\ | |
1028 | The letters allowed are `e', `f' and `g'.\n\ | |
1029 | Use `e' for exponential notation \"DIG.DIGITSeEXPT\"\n\ | |
1030 | Use `f' for decimal point notation \"DIGITS.DIGITS\".\n\ | |
1031 | Use `g' to choose the shorter of those two formats for the number at hand.\n\ | |
1032 | The precision in any of these cases is the number of digits following\n\ | |
1033 | the decimal point. With `f', a precision of 0 means to omit the\n\ | |
1034 | decimal point. 0 is not allowed with `f' or `g'.\n\n\ | |
1035 | A value of nil means to use `%.20g'."); | |
1036 | Vfloat_output_format = Qnil; | |
1037 | Qfloat_output_format = intern ("float-output-format"); | |
1038 | staticpro (&Qfloat_output_format); | |
1039 | #endif /* LISP_FLOAT_TYPE */ | |
1040 | ||
1041 | DEFVAR_LISP ("print-length", &Vprint_length, | |
aa734e17 | 1042 | "Maximum length of list to print before abbreviating.\n\ |
38010d50 JB |
1043 | A value of nil means no limit."); |
1044 | Vprint_length = Qnil; | |
1045 | ||
1046 | DEFVAR_LISP ("print-level", &Vprint_level, | |
aa734e17 | 1047 | "Maximum depth of list nesting to print before abbreviating.\n\ |
38010d50 JB |
1048 | A value of nil means no limit."); |
1049 | Vprint_level = Qnil; | |
1050 | ||
1051 | DEFVAR_BOOL ("print-escape-newlines", &print_escape_newlines, | |
1052 | "Non-nil means print newlines in strings as backslash-n."); | |
1053 | print_escape_newlines = 0; | |
1054 | ||
1055 | /* prin1_to_string_buffer initialized in init_buffer_once in buffer.c */ | |
1056 | staticpro (&Vprin1_to_string_buffer); | |
1057 | ||
1058 | defsubr (&Sprin1); | |
1059 | defsubr (&Sprin1_to_string); | |
1060 | defsubr (&Sprinc); | |
1061 | defsubr (&Sprint); | |
1062 | defsubr (&Sterpri); | |
1063 | defsubr (&Swrite_char); | |
1064 | defsubr (&Sexternal_debugging_output); | |
1065 | ||
1066 | Qexternal_debugging_output = intern ("external-debugging-output"); | |
1067 | staticpro (&Qexternal_debugging_output); | |
1068 | ||
1069 | #ifndef standalone | |
1070 | defsubr (&Swith_output_to_temp_buffer); | |
1071 | #endif /* not standalone */ | |
1072 | } |