Commit | Line | Data |
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38010d50 | 1 | /* Lisp object printing and output streams. |
4746118a | 2 | Copyright (C) 1985, 1986, 1988, 1992 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" | |
28 | #include "screen.h" | |
29 | #include "window.h" | |
30 | #include "process.h" | |
31 | #include "dispextern.h" | |
32 | #include "termchar.h" | |
33 | #endif /* not standalone */ | |
34 | ||
35 | Lisp_Object Vstandard_output, Qstandard_output; | |
36 | ||
37 | #ifdef LISP_FLOAT_TYPE | |
38 | Lisp_Object Vfloat_output_format, Qfloat_output_format; | |
39 | #endif /* LISP_FLOAT_TYPE */ | |
40 | ||
41 | /* Avoid actual stack overflow in print. */ | |
42 | int print_depth; | |
43 | ||
ec838c39 RS |
44 | /* Detect most circularities to print finite output. */ |
45 | #define PRINT_CIRCLE 200 | |
46 | Lisp_Object being_printed[PRINT_CIRCLE]; | |
47 | ||
38010d50 JB |
48 | /* Maximum length of list to print in full; noninteger means |
49 | effectively infinity */ | |
50 | ||
51 | Lisp_Object Vprint_length; | |
52 | ||
53 | /* Maximum depth of list to print in full; noninteger means | |
54 | effectively infinity. */ | |
55 | ||
56 | Lisp_Object Vprint_level; | |
57 | ||
58 | /* Nonzero means print newlines in strings as \n. */ | |
59 | ||
60 | int print_escape_newlines; | |
61 | ||
62 | Lisp_Object Qprint_escape_newlines; | |
63 | ||
64 | /* Nonzero means print newline before next minibuffer message. | |
65 | Defined in xdisp.c */ | |
66 | ||
67 | extern int noninteractive_need_newline; | |
68 | #ifdef MAX_PRINT_CHARS | |
69 | static int print_chars; | |
70 | static int max_print; | |
71 | #endif /* MAX_PRINT_CHARS */ | |
72 | \f | |
73 | #if 0 | |
74 | /* Convert between chars and GLYPHs */ | |
75 | ||
76 | int | |
77 | glyphlen (glyphs) | |
78 | register GLYPH *glyphs; | |
79 | { | |
80 | register int i = 0; | |
81 | ||
82 | while (glyphs[i]) | |
83 | i++; | |
84 | return i; | |
85 | } | |
86 | ||
87 | void | |
88 | str_to_glyph_cpy (str, glyphs) | |
89 | char *str; | |
90 | GLYPH *glyphs; | |
91 | { | |
92 | register GLYPH *gp = glyphs; | |
93 | register char *cp = str; | |
94 | ||
95 | while (*cp) | |
96 | *gp++ = *cp++; | |
97 | } | |
98 | ||
99 | void | |
100 | str_to_glyph_ncpy (str, glyphs, n) | |
101 | char *str; | |
102 | GLYPH *glyphs; | |
103 | register int n; | |
104 | { | |
105 | register GLYPH *gp = glyphs; | |
106 | register char *cp = str; | |
107 | ||
108 | while (n-- > 0) | |
109 | *gp++ = *cp++; | |
110 | } | |
111 | ||
112 | void | |
113 | glyph_to_str_cpy (glyphs, str) | |
114 | GLYPH *glyphs; | |
115 | char *str; | |
116 | { | |
117 | register GLYPH *gp = glyphs; | |
118 | register char *cp = str; | |
119 | ||
120 | while (*gp) | |
121 | *str++ = *gp++ & 0377; | |
122 | } | |
123 | #endif | |
124 | \f | |
125 | /* Low level output routines for charaters and strings */ | |
126 | ||
127 | /* Lisp functions to do output using a stream | |
128 | must have the stream in a variable called printcharfun | |
129 | and must start with PRINTPREPARE and end with PRINTFINISH. | |
130 | Use PRINTCHAR to output one character, | |
131 | or call strout to output a block of characters. | |
132 | Also, each one must have the declarations | |
133 | struct buffer *old = current_buffer; | |
134 | int old_point = -1, start_point; | |
135 | Lisp_Object original; | |
136 | */ | |
137 | ||
138 | #define PRINTPREPARE \ | |
139 | original = printcharfun; \ | |
10eebdbb | 140 | if (NILP (printcharfun)) printcharfun = Qt; \ |
38010d50 JB |
141 | if (XTYPE (printcharfun) == Lisp_Buffer) \ |
142 | { if (XBUFFER (printcharfun) != current_buffer) Fset_buffer (printcharfun); \ | |
143 | printcharfun = Qnil;}\ | |
144 | if (XTYPE (printcharfun) == Lisp_Marker) \ | |
145 | { if (XMARKER (original)->buffer != current_buffer) \ | |
146 | set_buffer_internal (XMARKER (original)->buffer); \ | |
147 | old_point = point; \ | |
148 | SET_PT (marker_position (printcharfun)); \ | |
149 | start_point = point; \ | |
150 | printcharfun = Qnil;} | |
151 | ||
152 | #define PRINTFINISH \ | |
153 | if (XTYPE (original) == Lisp_Marker) \ | |
154 | Fset_marker (original, make_number (point), Qnil); \ | |
155 | if (old_point >= 0) \ | |
156 | SET_PT ((old_point >= start_point ? point - start_point : 0) + old_point); \ | |
157 | if (old != current_buffer) \ | |
158 | set_buffer_internal (old) | |
159 | ||
160 | #define PRINTCHAR(ch) printchar (ch, printcharfun) | |
161 | ||
e5d77022 | 162 | /* Index of first unused element of SCREEN_MESSAGE_BUF(selected_screen). */ |
38010d50 JB |
163 | static int printbufidx; |
164 | ||
165 | static void | |
166 | printchar (ch, fun) | |
167 | unsigned char ch; | |
168 | Lisp_Object fun; | |
169 | { | |
170 | Lisp_Object ch1; | |
171 | ||
172 | #ifdef MAX_PRINT_CHARS | |
173 | if (max_print) | |
174 | print_chars++; | |
175 | #endif /* MAX_PRINT_CHARS */ | |
176 | #ifndef standalone | |
177 | if (EQ (fun, Qnil)) | |
178 | { | |
179 | QUIT; | |
180 | insert (&ch, 1); | |
181 | return; | |
182 | } | |
183 | ||
184 | if (EQ (fun, Qt)) | |
185 | { | |
186 | if (noninteractive) | |
187 | { | |
188 | putchar (ch); | |
189 | noninteractive_need_newline = 1; | |
190 | return; | |
191 | } | |
192 | ||
193 | if (echo_area_glyphs != SCREEN_MESSAGE_BUF (selected_screen) | |
194 | || !message_buf_print) | |
195 | { | |
196 | echo_area_glyphs = SCREEN_MESSAGE_BUF (selected_screen); | |
197 | printbufidx = 0; | |
198 | message_buf_print = 1; | |
199 | } | |
200 | ||
201 | if (printbufidx < SCREEN_WIDTH (selected_screen) - 1) | |
202 | SCREEN_MESSAGE_BUF (selected_screen)[printbufidx++] = ch; | |
203 | SCREEN_MESSAGE_BUF (selected_screen)[printbufidx] = 0; | |
204 | ||
205 | return; | |
206 | } | |
207 | #endif /* not standalone */ | |
208 | ||
209 | XFASTINT (ch1) = ch; | |
210 | call1 (fun, ch1); | |
211 | } | |
212 | ||
213 | static void | |
214 | strout (ptr, size, printcharfun) | |
215 | char *ptr; | |
216 | int size; | |
217 | Lisp_Object printcharfun; | |
218 | { | |
219 | int i = 0; | |
220 | ||
221 | if (EQ (printcharfun, Qnil)) | |
222 | { | |
223 | insert (ptr, size >= 0 ? size : strlen (ptr)); | |
224 | #ifdef MAX_PRINT_CHARS | |
225 | if (max_print) | |
226 | print_chars += size >= 0 ? size : strlen(ptr); | |
227 | #endif /* MAX_PRINT_CHARS */ | |
228 | return; | |
229 | } | |
230 | if (EQ (printcharfun, Qt)) | |
231 | { | |
232 | i = size >= 0 ? size : strlen (ptr); | |
233 | #ifdef MAX_PRINT_CHARS | |
234 | if (max_print) | |
235 | print_chars += i; | |
236 | #endif /* MAX_PRINT_CHARS */ | |
237 | ||
238 | if (noninteractive) | |
239 | { | |
240 | fwrite (ptr, 1, i, stdout); | |
241 | noninteractive_need_newline = 1; | |
242 | return; | |
243 | } | |
244 | ||
245 | if (echo_area_glyphs != SCREEN_MESSAGE_BUF (selected_screen) | |
246 | || !message_buf_print) | |
247 | { | |
248 | echo_area_glyphs = SCREEN_MESSAGE_BUF (selected_screen); | |
249 | printbufidx = 0; | |
250 | message_buf_print = 1; | |
251 | } | |
252 | ||
253 | if (i > SCREEN_WIDTH (selected_screen) - printbufidx - 1) | |
254 | i = SCREEN_WIDTH (selected_screen) - printbufidx - 1; | |
255 | bcopy (ptr, &SCREEN_MESSAGE_BUF (selected_screen) [printbufidx], i); | |
256 | printbufidx += i; | |
257 | SCREEN_MESSAGE_BUF (selected_screen) [printbufidx] = 0; | |
258 | ||
259 | return; | |
260 | } | |
261 | ||
262 | if (size >= 0) | |
263 | while (i < size) | |
264 | PRINTCHAR (ptr[i++]); | |
265 | else | |
266 | while (ptr[i]) | |
267 | PRINTCHAR (ptr[i++]); | |
268 | } | |
269 | ||
270 | /* Print the contents of a string STRING using PRINTCHARFUN. | |
271 | It isn't safe to use strout, because printing one char can relocate. */ | |
272 | ||
273 | print_string (string, printcharfun) | |
274 | Lisp_Object string; | |
275 | Lisp_Object printcharfun; | |
276 | { | |
277 | if (EQ (printcharfun, Qnil) || EQ (printcharfun, Qt)) | |
278 | /* In predictable cases, strout is safe: output to buffer or screen. */ | |
279 | strout (XSTRING (string)->data, XSTRING (string)->size, printcharfun); | |
280 | else | |
281 | { | |
282 | /* Otherwise, fetch the string address for each character. */ | |
283 | int i; | |
284 | int size = XSTRING (string)->size; | |
285 | struct gcpro gcpro1; | |
286 | GCPRO1 (string); | |
287 | for (i = 0; i < size; i++) | |
288 | PRINTCHAR (XSTRING (string)->data[i]); | |
289 | UNGCPRO; | |
290 | } | |
291 | } | |
292 | \f | |
293 | DEFUN ("write-char", Fwrite_char, Swrite_char, 1, 2, 0, | |
294 | "Output character CHAR to stream STREAM.\n\ | |
295 | STREAM defaults to the value of `standard-output' (which see).") | |
296 | (ch, printcharfun) | |
297 | Lisp_Object ch, printcharfun; | |
298 | { | |
299 | struct buffer *old = current_buffer; | |
300 | int old_point = -1; | |
301 | int start_point; | |
302 | Lisp_Object original; | |
303 | ||
10eebdbb | 304 | if (NILP (printcharfun)) |
38010d50 JB |
305 | printcharfun = Vstandard_output; |
306 | CHECK_NUMBER (ch, 0); | |
307 | PRINTPREPARE; | |
308 | PRINTCHAR (XINT (ch)); | |
309 | PRINTFINISH; | |
310 | return ch; | |
311 | } | |
312 | ||
313 | /* Used from outside of print.c to print a block of SIZE chars at DATA | |
314 | on the default output stream. | |
315 | Do not use this on the contents of a Lisp string. */ | |
316 | ||
317 | write_string (data, size) | |
318 | char *data; | |
319 | int size; | |
320 | { | |
321 | struct buffer *old = current_buffer; | |
322 | Lisp_Object printcharfun; | |
323 | int old_point = -1; | |
324 | int start_point; | |
325 | Lisp_Object original; | |
326 | ||
327 | printcharfun = Vstandard_output; | |
328 | ||
329 | PRINTPREPARE; | |
330 | strout (data, size, printcharfun); | |
331 | PRINTFINISH; | |
332 | } | |
333 | ||
334 | /* Used from outside of print.c to print a block of SIZE chars at DATA | |
335 | on a specified stream PRINTCHARFUN. | |
336 | Do not use this on the contents of a Lisp string. */ | |
337 | ||
338 | write_string_1 (data, size, printcharfun) | |
339 | char *data; | |
340 | int size; | |
341 | Lisp_Object printcharfun; | |
342 | { | |
343 | struct buffer *old = current_buffer; | |
344 | int old_point = -1; | |
345 | int start_point; | |
346 | Lisp_Object original; | |
347 | ||
348 | PRINTPREPARE; | |
349 | strout (data, size, printcharfun); | |
350 | PRINTFINISH; | |
351 | } | |
352 | ||
353 | ||
354 | #ifndef standalone | |
355 | ||
356 | void | |
357 | temp_output_buffer_setup (bufname) | |
358 | char *bufname; | |
359 | { | |
360 | register struct buffer *old = current_buffer; | |
361 | register Lisp_Object buf; | |
362 | ||
363 | Fset_buffer (Fget_buffer_create (build_string (bufname))); | |
364 | ||
365 | current_buffer->read_only = Qnil; | |
366 | Ferase_buffer (); | |
367 | ||
368 | XSET (buf, Lisp_Buffer, current_buffer); | |
369 | specbind (Qstandard_output, buf); | |
370 | ||
371 | set_buffer_internal (old); | |
372 | } | |
373 | ||
374 | Lisp_Object | |
375 | internal_with_output_to_temp_buffer (bufname, function, args) | |
376 | char *bufname; | |
377 | Lisp_Object (*function) (); | |
378 | Lisp_Object args; | |
379 | { | |
380 | int count = specpdl_ptr - specpdl; | |
381 | Lisp_Object buf, val; | |
382 | ||
383 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
384 | temp_output_buffer_setup (bufname); | |
385 | buf = Vstandard_output; | |
386 | ||
387 | val = (*function) (args); | |
388 | ||
389 | temp_output_buffer_show (buf); | |
390 | ||
391 | return unbind_to (count, val); | |
392 | } | |
393 | ||
394 | DEFUN ("with-output-to-temp-buffer", Fwith_output_to_temp_buffer, Swith_output_to_temp_buffer, | |
395 | 1, UNEVALLED, 0, | |
396 | "Bind `standard-output' to buffer BUFNAME, eval BODY, then show that buffer.\n\ | |
397 | The buffer is cleared out initially, and marked as unmodified when done.\n\ | |
398 | All output done by BODY is inserted in that buffer by default.\n\ | |
399 | The buffer is displayed in another window, but not selected.\n\ | |
400 | The value of the last form in BODY is returned.\n\ | |
401 | If BODY does not finish normally, the buffer BUFNAME is not displayed.\n\n\ | |
402 | If variable `temp-buffer-show-hook' is non-nil, call it at the end\n\ | |
403 | to get the buffer displayed. It gets one argument, the buffer to display.") | |
404 | (args) | |
405 | Lisp_Object args; | |
406 | { | |
407 | struct gcpro gcpro1; | |
408 | Lisp_Object name; | |
409 | int count = specpdl_ptr - specpdl; | |
410 | Lisp_Object buf, val; | |
411 | ||
412 | GCPRO1(args); | |
413 | name = Feval (Fcar (args)); | |
414 | UNGCPRO; | |
415 | ||
416 | CHECK_STRING (name, 0); | |
417 | temp_output_buffer_setup (XSTRING (name)->data); | |
418 | buf = Vstandard_output; | |
419 | ||
420 | val = Fprogn (Fcdr (args)); | |
421 | ||
422 | temp_output_buffer_show (buf); | |
423 | ||
424 | return unbind_to (count, val); | |
425 | } | |
426 | #endif /* not standalone */ | |
427 | \f | |
428 | static void print (); | |
429 | ||
430 | DEFUN ("terpri", Fterpri, Sterpri, 0, 1, 0, | |
431 | "Output a newline to STREAM.\n\ | |
432 | If STREAM is omitted or nil, the value of `standard-output' is used.") | |
433 | (printcharfun) | |
434 | Lisp_Object printcharfun; | |
435 | { | |
436 | struct buffer *old = current_buffer; | |
437 | int old_point = -1; | |
438 | int start_point; | |
439 | Lisp_Object original; | |
440 | ||
10eebdbb | 441 | if (NILP (printcharfun)) |
38010d50 JB |
442 | printcharfun = Vstandard_output; |
443 | PRINTPREPARE; | |
444 | PRINTCHAR ('\n'); | |
445 | PRINTFINISH; | |
446 | return Qt; | |
447 | } | |
448 | ||
449 | DEFUN ("prin1", Fprin1, Sprin1, 1, 2, 0, | |
450 | "Output the printed representation of OBJECT, any Lisp object.\n\ | |
451 | Quoting characters are printed when needed to make output that `read'\n\ | |
452 | can handle, whenever this is possible.\n\ | |
453 | Output stream is STREAM, or value of `standard-output' (which see).") | |
454 | (obj, printcharfun) | |
455 | Lisp_Object obj, printcharfun; | |
456 | { | |
457 | struct buffer *old = current_buffer; | |
458 | int old_point = -1; | |
459 | int start_point; | |
460 | Lisp_Object original; | |
461 | ||
462 | #ifdef MAX_PRINT_CHARS | |
463 | max_print = 0; | |
464 | #endif /* MAX_PRINT_CHARS */ | |
10eebdbb | 465 | if (NILP (printcharfun)) |
38010d50 JB |
466 | printcharfun = Vstandard_output; |
467 | PRINTPREPARE; | |
468 | print_depth = 0; | |
469 | print (obj, printcharfun, 1); | |
470 | PRINTFINISH; | |
471 | return obj; | |
472 | } | |
473 | ||
474 | /* a buffer which is used to hold output being built by prin1-to-string */ | |
475 | Lisp_Object Vprin1_to_string_buffer; | |
476 | ||
477 | DEFUN ("prin1-to-string", Fprin1_to_string, Sprin1_to_string, 1, 2, 0, | |
478 | "Return a string containing the printed representation of OBJECT,\n\ | |
479 | any Lisp object. Quoting characters are used when needed to make output\n\ | |
480 | that `read' can handle, whenever this is possible, unless the optional\n\ | |
481 | second argument NOESCAPE is non-nil.") | |
482 | (obj, noescape) | |
483 | Lisp_Object obj, noescape; | |
484 | { | |
485 | struct buffer *old = current_buffer; | |
486 | int old_point = -1; | |
487 | int start_point; | |
488 | Lisp_Object original, printcharfun; | |
489 | struct gcpro gcpro1; | |
490 | ||
491 | printcharfun = Vprin1_to_string_buffer; | |
492 | PRINTPREPARE; | |
493 | print_depth = 0; | |
10eebdbb | 494 | print (obj, printcharfun, NILP (noescape)); |
38010d50 JB |
495 | /* Make Vprin1_to_string_buffer be the default buffer after PRINTFINSH */ |
496 | PRINTFINISH; | |
497 | set_buffer_internal (XBUFFER (Vprin1_to_string_buffer)); | |
498 | obj = Fbuffer_string (); | |
499 | ||
500 | GCPRO1 (obj); | |
501 | Ferase_buffer (); | |
502 | set_buffer_internal (old); | |
503 | UNGCPRO; | |
504 | ||
505 | return obj; | |
506 | } | |
507 | ||
508 | DEFUN ("princ", Fprinc, Sprinc, 1, 2, 0, | |
509 | "Output the printed representation of OBJECT, any Lisp object.\n\ | |
510 | No quoting characters are used; no delimiters are printed around\n\ | |
511 | the contents of strings.\n\ | |
512 | Output stream is STREAM, or value of standard-output (which see).") | |
513 | (obj, printcharfun) | |
514 | Lisp_Object obj, printcharfun; | |
515 | { | |
516 | struct buffer *old = current_buffer; | |
517 | int old_point = -1; | |
518 | int start_point; | |
519 | Lisp_Object original; | |
520 | ||
10eebdbb | 521 | if (NILP (printcharfun)) |
38010d50 JB |
522 | printcharfun = Vstandard_output; |
523 | PRINTPREPARE; | |
524 | print_depth = 0; | |
525 | print (obj, printcharfun, 0); | |
526 | PRINTFINISH; | |
527 | return obj; | |
528 | } | |
529 | ||
530 | DEFUN ("print", Fprint, Sprint, 1, 2, 0, | |
531 | "Output the printed representation of OBJECT, with newlines around it.\n\ | |
532 | Quoting characters are printed when needed to make output that `read'\n\ | |
533 | can handle, whenever this is possible.\n\ | |
534 | Output stream is STREAM, or value of `standard-output' (which see).") | |
535 | (obj, printcharfun) | |
536 | Lisp_Object obj, printcharfun; | |
537 | { | |
538 | struct buffer *old = current_buffer; | |
539 | int old_point = -1; | |
540 | int start_point; | |
541 | Lisp_Object original; | |
542 | struct gcpro gcpro1; | |
543 | ||
544 | #ifdef MAX_PRINT_CHARS | |
545 | print_chars = 0; | |
546 | max_print = MAX_PRINT_CHARS; | |
547 | #endif /* MAX_PRINT_CHARS */ | |
10eebdbb | 548 | if (NILP (printcharfun)) |
38010d50 JB |
549 | printcharfun = Vstandard_output; |
550 | GCPRO1 (obj); | |
551 | PRINTPREPARE; | |
552 | print_depth = 0; | |
553 | PRINTCHAR ('\n'); | |
554 | print (obj, printcharfun, 1); | |
555 | PRINTCHAR ('\n'); | |
556 | PRINTFINISH; | |
557 | #ifdef MAX_PRINT_CHARS | |
558 | max_print = 0; | |
559 | print_chars = 0; | |
560 | #endif /* MAX_PRINT_CHARS */ | |
561 | UNGCPRO; | |
562 | return obj; | |
563 | } | |
564 | ||
565 | /* The subroutine object for external-debugging-output is kept here | |
566 | for the convenience of the debugger. */ | |
567 | Lisp_Object Qexternal_debugging_output; | |
568 | ||
4746118a JB |
569 | DEFUN ("external-debugging-output", Fexternal_debugging_output, Sexternal_debugging_output, 1, 1, 0, |
570 | "Write CHARACTER to stderr.\n\ | |
38010d50 JB |
571 | You can call print while debugging emacs, and pass it this function\n\ |
572 | to make it write to the debugging output.\n") | |
4746118a JB |
573 | (character) |
574 | Lisp_Object character; | |
38010d50 JB |
575 | { |
576 | CHECK_NUMBER (character, 0); | |
577 | putc (XINT (character), stderr); | |
578 | ||
579 | return character; | |
580 | } | |
581 | \f | |
582 | #ifdef LISP_FLOAT_TYPE | |
583 | ||
584 | void | |
585 | float_to_string (buf, data) | |
586 | char *buf; | |
587 | /* | |
588 | * This buffer should be at least as large as the max string size of the | |
589 | * largest float, printed in the biggest notation. This is undoubtably | |
590 | * 20d float_output_format, with the negative of the C-constant "HUGE" | |
591 | * from <math.h>. | |
592 | * | |
593 | * On the vax the worst case is -1e38 in 20d format which takes 61 bytes. | |
594 | * | |
595 | * I assume that IEEE-754 format numbers can take 329 bytes for the worst | |
596 | * case of -1e307 in 20d float_output_format. What is one to do (short of | |
597 | * re-writing _doprnt to be more sane)? | |
598 | * -wsr | |
599 | */ | |
600 | double data; | |
601 | { | |
602 | register unsigned char *cp, c; | |
603 | register int width; | |
604 | ||
10eebdbb | 605 | if (NILP (Vfloat_output_format) |
38010d50 JB |
606 | || XTYPE (Vfloat_output_format) != Lisp_String) |
607 | lose: | |
608 | sprintf (buf, "%.20g", data); | |
609 | else /* oink oink */ | |
610 | { | |
611 | /* Check that the spec we have is fully valid. | |
612 | This means not only valid for printf, | |
613 | but meant for floats, and reasonable. */ | |
614 | cp = XSTRING (Vfloat_output_format)->data; | |
615 | ||
616 | if (cp[0] != '%') | |
617 | goto lose; | |
618 | if (cp[1] != '.') | |
619 | goto lose; | |
620 | ||
621 | cp += 2; | |
622 | for (width = 0; | |
623 | ((c = *cp) >= '0' && c <= '9'); | |
624 | cp++) | |
625 | { | |
626 | width *= 10; | |
627 | width += c - '0'; | |
628 | } | |
629 | ||
630 | if (*cp != 'e' && *cp != 'f' && *cp != 'g') | |
631 | goto lose; | |
632 | ||
633 | if (width < (*cp != 'e') || width > DBL_DIG) | |
634 | goto lose; | |
635 | ||
636 | if (cp[1] != 0) | |
637 | goto lose; | |
638 | ||
639 | sprintf (buf, XSTRING (Vfloat_output_format)->data, data); | |
640 | } | |
641 | } | |
642 | #endif /* LISP_FLOAT_TYPE */ | |
643 | \f | |
644 | static void | |
645 | print (obj, printcharfun, escapeflag) | |
646 | #ifndef RTPC_REGISTER_BUG | |
647 | register Lisp_Object obj; | |
648 | #else | |
649 | Lisp_Object obj; | |
650 | #endif | |
651 | register Lisp_Object printcharfun; | |
652 | int escapeflag; | |
653 | { | |
654 | char buf[30]; | |
655 | ||
656 | QUIT; | |
657 | ||
ec838c39 RS |
658 | #if 1 /* I'm not sure this is really worth doing. */ |
659 | /* Detect circularities and truncate them. | |
660 | No need to offer any alternative--this is better than an error. */ | |
661 | if (XTYPE (obj) == Lisp_Cons || XTYPE (obj) == Lisp_Vector | |
662 | || XTYPE (obj) == Lisp_Compiled) | |
663 | { | |
664 | int i; | |
665 | for (i = 0; i < print_depth; i++) | |
666 | if (EQ (obj, being_printed[i])) | |
667 | { | |
668 | sprintf (buf, "#%d", i); | |
669 | strout (buf, -1, printcharfun); | |
670 | return; | |
671 | } | |
672 | } | |
673 | #endif | |
674 | ||
675 | being_printed[print_depth] = obj; | |
38010d50 JB |
676 | print_depth++; |
677 | ||
ec838c39 | 678 | if (print_depth > PRINT_CIRCLE) |
38010d50 JB |
679 | error ("Apparently circular structure being printed"); |
680 | #ifdef MAX_PRINT_CHARS | |
681 | if (max_print && print_chars > max_print) | |
682 | { | |
683 | PRINTCHAR ('\n'); | |
684 | print_chars = 0; | |
685 | } | |
686 | #endif /* MAX_PRINT_CHARS */ | |
687 | ||
688 | #ifdef SWITCH_ENUM_BUG | |
689 | switch ((int) XTYPE (obj)) | |
690 | #else | |
691 | switch (XTYPE (obj)) | |
692 | #endif | |
693 | { | |
694 | default: | |
695 | /* We're in trouble if this happens! | |
696 | Probably should just abort () */ | |
697 | strout ("#<EMACS BUG: INVALID DATATYPE ", -1, printcharfun); | |
698 | sprintf (buf, "(#o%3o)", (int) XTYPE (obj)); | |
699 | strout (buf, -1, printcharfun); | |
700 | strout (" Save your buffers immediately and please report this bug>", | |
701 | -1, printcharfun); | |
702 | break; | |
703 | ||
704 | #ifdef LISP_FLOAT_TYPE | |
705 | case Lisp_Float: | |
706 | { | |
707 | char pigbuf[350]; /* see comments in float_to_string */ | |
708 | ||
709 | float_to_string (pigbuf, XFLOAT(obj)->data); | |
710 | strout (pigbuf, -1, printcharfun); | |
711 | } | |
712 | break; | |
713 | #endif /* LISP_FLOAT_TYPE */ | |
714 | ||
715 | case Lisp_Int: | |
716 | sprintf (buf, "%d", XINT (obj)); | |
717 | strout (buf, -1, printcharfun); | |
718 | break; | |
719 | ||
720 | case Lisp_String: | |
721 | if (!escapeflag) | |
722 | print_string (obj, printcharfun); | |
723 | else | |
724 | { | |
725 | register int i; | |
726 | register unsigned char c; | |
727 | Lisp_Object obj1; | |
728 | struct gcpro gcpro1; | |
729 | ||
730 | /* You can't gcpro register variables, so copy obj to a | |
731 | non-register variable so we can gcpro it without | |
732 | making it non-register. */ | |
733 | obj1 = obj; | |
734 | GCPRO1 (obj1); | |
735 | ||
736 | PRINTCHAR ('\"'); | |
737 | for (i = 0; i < XSTRING (obj)->size; i++) | |
738 | { | |
739 | QUIT; | |
740 | c = XSTRING (obj)->data[i]; | |
741 | if (c == '\n' && print_escape_newlines) | |
742 | { | |
743 | PRINTCHAR ('\\'); | |
744 | PRINTCHAR ('n'); | |
745 | } | |
746 | else | |
747 | { | |
748 | if (c == '\"' || c == '\\') | |
749 | PRINTCHAR ('\\'); | |
750 | PRINTCHAR (c); | |
751 | } | |
752 | } | |
753 | PRINTCHAR ('\"'); | |
754 | UNGCPRO; | |
755 | } | |
756 | break; | |
757 | ||
758 | case Lisp_Symbol: | |
759 | { | |
760 | register int confusing; | |
761 | register unsigned char *p = XSYMBOL (obj)->name->data; | |
762 | register unsigned char *end = p + XSYMBOL (obj)->name->size; | |
763 | register unsigned char c; | |
764 | ||
765 | if (p != end && (*p == '-' || *p == '+')) p++; | |
766 | if (p == end) | |
767 | confusing = 0; | |
768 | else | |
769 | { | |
770 | while (p != end && *p >= '0' && *p <= '9') | |
771 | p++; | |
772 | confusing = (end == p); | |
773 | } | |
774 | ||
775 | p = XSYMBOL (obj)->name->data; | |
776 | while (p != end) | |
777 | { | |
778 | QUIT; | |
779 | c = *p++; | |
780 | if (escapeflag) | |
781 | { | |
782 | if (c == '\"' || c == '\\' || c == '\'' || c == ';' || c == '#' || | |
783 | c == '(' || c == ')' || c == ',' || c =='.' || c == '`' || | |
784 | c == '[' || c == ']' || c == '?' || c <= 040 || confusing) | |
785 | PRINTCHAR ('\\'), confusing = 0; | |
786 | } | |
787 | PRINTCHAR (c); | |
788 | } | |
789 | } | |
790 | break; | |
791 | ||
792 | case Lisp_Cons: | |
793 | /* If deeper than spec'd depth, print placeholder. */ | |
794 | if (XTYPE (Vprint_level) == Lisp_Int | |
795 | && print_depth > XINT (Vprint_level)) | |
796 | { | |
797 | strout ("...", -1, printcharfun); | |
798 | break; | |
799 | } | |
800 | ||
801 | PRINTCHAR ('('); | |
802 | { | |
803 | register int i = 0; | |
804 | register int max = 0; | |
805 | ||
806 | if (XTYPE (Vprint_length) == Lisp_Int) | |
807 | max = XINT (Vprint_length); | |
ec838c39 RS |
808 | /* Could recognize circularities in cdrs here, |
809 | but that would make printing of long lists quadratic. | |
810 | It's not worth doing. */ | |
38010d50 JB |
811 | while (CONSP (obj)) |
812 | { | |
813 | if (i++) | |
814 | PRINTCHAR (' '); | |
815 | if (max && i > max) | |
816 | { | |
817 | strout ("...", 3, printcharfun); | |
818 | break; | |
819 | } | |
820 | print (Fcar (obj), printcharfun, escapeflag); | |
821 | obj = Fcdr (obj); | |
822 | } | |
823 | } | |
10eebdbb | 824 | if (!NILP (obj) && !CONSP (obj)) |
38010d50 JB |
825 | { |
826 | strout (" . ", 3, printcharfun); | |
827 | print (obj, printcharfun, escapeflag); | |
828 | } | |
829 | PRINTCHAR (')'); | |
830 | break; | |
831 | ||
832 | case Lisp_Compiled: | |
200f684e | 833 | strout ("#", -1, printcharfun); |
38010d50 JB |
834 | case Lisp_Vector: |
835 | PRINTCHAR ('['); | |
836 | { | |
837 | register int i; | |
838 | register Lisp_Object tem; | |
839 | for (i = 0; i < XVECTOR (obj)->size; i++) | |
840 | { | |
841 | if (i) PRINTCHAR (' '); | |
842 | tem = XVECTOR (obj)->contents[i]; | |
843 | print (tem, printcharfun, escapeflag); | |
844 | } | |
845 | } | |
846 | PRINTCHAR (']'); | |
38010d50 JB |
847 | break; |
848 | ||
849 | #ifndef standalone | |
850 | case Lisp_Buffer: | |
10eebdbb | 851 | if (NILP (XBUFFER (obj)->name)) |
38010d50 JB |
852 | strout ("#<killed buffer>", -1, printcharfun); |
853 | else if (escapeflag) | |
854 | { | |
855 | strout ("#<buffer ", -1, printcharfun); | |
856 | print_string (XBUFFER (obj)->name, printcharfun); | |
857 | PRINTCHAR ('>'); | |
858 | } | |
859 | else | |
860 | print_string (XBUFFER (obj)->name, printcharfun); | |
861 | break; | |
862 | ||
863 | case Lisp_Process: | |
864 | if (escapeflag) | |
865 | { | |
866 | strout ("#<process ", -1, printcharfun); | |
867 | print_string (XPROCESS (obj)->name, printcharfun); | |
868 | PRINTCHAR ('>'); | |
869 | } | |
870 | else | |
871 | print_string (XPROCESS (obj)->name, printcharfun); | |
872 | break; | |
873 | ||
874 | case Lisp_Window: | |
875 | strout ("#<window ", -1, printcharfun); | |
876 | sprintf (buf, "%d", XFASTINT (XWINDOW (obj)->sequence_number)); | |
877 | strout (buf, -1, printcharfun); | |
10eebdbb | 878 | if (!NILP (XWINDOW (obj)->buffer)) |
38010d50 JB |
879 | { |
880 | strout (" on ", -1, printcharfun); | |
881 | print_string (XBUFFER (XWINDOW (obj)->buffer)->name, printcharfun); | |
882 | } | |
883 | PRINTCHAR ('>'); | |
884 | break; | |
885 | ||
886 | case Lisp_Window_Configuration: | |
887 | strout ("#<window-configuration>", -1, printcharfun); | |
888 | break; | |
889 | ||
890 | #ifdef MULTI_SCREEN | |
891 | case Lisp_Screen: | |
42dcdd5f JB |
892 | strout (((XSCREEN (obj)->display.nothing == 0) |
893 | ? "#<dead screen " : "#<screen "), | |
894 | -1, printcharfun); | |
38010d50 JB |
895 | print_string (XSCREEN (obj)->name, printcharfun); |
896 | sprintf (buf, " 0x%x", XFASTINT (XSCREEN (obj))); | |
897 | strout (buf, -1, printcharfun); | |
898 | strout (">", -1, printcharfun); | |
899 | break; | |
900 | #endif /* MULTI_SCREEN */ | |
901 | ||
902 | case Lisp_Marker: | |
903 | strout ("#<marker ", -1, printcharfun); | |
904 | if (!(XMARKER (obj)->buffer)) | |
905 | strout ("in no buffer", -1, printcharfun); | |
906 | else | |
907 | { | |
908 | sprintf (buf, "at %d", marker_position (obj)); | |
909 | strout (buf, -1, printcharfun); | |
910 | strout (" in ", -1, printcharfun); | |
911 | print_string (XMARKER (obj)->buffer->name, printcharfun); | |
912 | } | |
913 | PRINTCHAR ('>'); | |
914 | break; | |
915 | #endif /* standalone */ | |
916 | ||
917 | case Lisp_Subr: | |
918 | strout ("#<subr ", -1, printcharfun); | |
919 | strout (XSUBR (obj)->symbol_name, -1, printcharfun); | |
920 | PRINTCHAR ('>'); | |
921 | break; | |
922 | } | |
923 | ||
924 | print_depth--; | |
925 | } | |
926 | \f | |
927 | void | |
928 | syms_of_print () | |
929 | { | |
930 | staticpro (&Qprint_escape_newlines); | |
931 | Qprint_escape_newlines = intern ("print-escape-newlines"); | |
932 | ||
933 | DEFVAR_LISP ("standard-output", &Vstandard_output, | |
934 | "Output stream `print' uses by default for outputting a character.\n\ | |
935 | This may be any function of one argument.\n\ | |
936 | It may also be a buffer (output is inserted before point)\n\ | |
937 | or a marker (output is inserted and the marker is advanced)\n\ | |
938 | or the symbol t (output appears in the minibuffer line)."); | |
939 | Vstandard_output = Qt; | |
940 | Qstandard_output = intern ("standard-output"); | |
941 | staticpro (&Qstandard_output); | |
942 | ||
943 | #ifdef LISP_FLOAT_TYPE | |
944 | DEFVAR_LISP ("float-output-format", &Vfloat_output_format, | |
06ef7355 | 945 | "The format descriptor string used to print floats.\n\ |
38010d50 JB |
946 | This is a %-spec like those accepted by `printf' in C,\n\ |
947 | but with some restrictions. It must start with the two characters `%.'.\n\ | |
948 | After that comes an integer precision specification,\n\ | |
949 | and then a letter which controls the format.\n\ | |
950 | The letters allowed are `e', `f' and `g'.\n\ | |
951 | Use `e' for exponential notation \"DIG.DIGITSeEXPT\"\n\ | |
952 | Use `f' for decimal point notation \"DIGITS.DIGITS\".\n\ | |
953 | Use `g' to choose the shorter of those two formats for the number at hand.\n\ | |
954 | The precision in any of these cases is the number of digits following\n\ | |
955 | the decimal point. With `f', a precision of 0 means to omit the\n\ | |
956 | decimal point. 0 is not allowed with `f' or `g'.\n\n\ | |
957 | A value of nil means to use `%.20g'."); | |
958 | Vfloat_output_format = Qnil; | |
959 | Qfloat_output_format = intern ("float-output-format"); | |
960 | staticpro (&Qfloat_output_format); | |
961 | #endif /* LISP_FLOAT_TYPE */ | |
962 | ||
963 | DEFVAR_LISP ("print-length", &Vprint_length, | |
aa734e17 | 964 | "Maximum length of list to print before abbreviating.\n\ |
38010d50 JB |
965 | A value of nil means no limit."); |
966 | Vprint_length = Qnil; | |
967 | ||
968 | DEFVAR_LISP ("print-level", &Vprint_level, | |
aa734e17 | 969 | "Maximum depth of list nesting to print before abbreviating.\n\ |
38010d50 JB |
970 | A value of nil means no limit."); |
971 | Vprint_level = Qnil; | |
972 | ||
973 | DEFVAR_BOOL ("print-escape-newlines", &print_escape_newlines, | |
974 | "Non-nil means print newlines in strings as backslash-n."); | |
975 | print_escape_newlines = 0; | |
976 | ||
977 | /* prin1_to_string_buffer initialized in init_buffer_once in buffer.c */ | |
978 | staticpro (&Vprin1_to_string_buffer); | |
979 | ||
980 | defsubr (&Sprin1); | |
981 | defsubr (&Sprin1_to_string); | |
982 | defsubr (&Sprinc); | |
983 | defsubr (&Sprint); | |
984 | defsubr (&Sterpri); | |
985 | defsubr (&Swrite_char); | |
986 | defsubr (&Sexternal_debugging_output); | |
987 | ||
988 | Qexternal_debugging_output = intern ("external-debugging-output"); | |
989 | staticpro (&Qexternal_debugging_output); | |
990 | ||
991 | #ifndef standalone | |
992 | defsubr (&Swith_output_to_temp_buffer); | |
993 | #endif /* not standalone */ | |
994 | } |