Commit | Line | Data |
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1e598865 | 1 | /* Copyright (C) 1995,1996,1997 Free Software Foundation, Inc. |
0f2d19dd JB |
2 | * |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
0f2d19dd JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
0f2d19dd JB |
41 | \f |
42 | ||
43 | #include <stdio.h> | |
44 | #include "_scm.h" | |
20e6290e JB |
45 | #include "chars.h" |
46 | #include "genio.h" | |
47 | #include "mbstrings.h" | |
48 | #include "smob.h" | |
49 | #include "eval.h" | |
50 | #include "procprop.h" | |
51 | #include "read.h" | |
52 | #include "weaks.h" | |
53 | #include "unif.h" | |
dbef8851 | 54 | #include "alist.h" |
c62fbfe1 | 55 | #include "struct.h" |
0f2d19dd | 56 | |
20e6290e | 57 | #include "print.h" |
0f2d19dd JB |
58 | \f |
59 | ||
60 | /* {Names of immediate symbols} | |
61 | * | |
62 | * This table must agree with the declarations in scm.h: {Immediate Symbols}. | |
63 | */ | |
64 | ||
65 | char *scm_isymnames[] = | |
66 | { | |
67 | /* This table must agree with the declarations */ | |
68 | "#@and", | |
69 | "#@begin", | |
70 | "#@case", | |
71 | "#@cond", | |
72 | "#@do", | |
73 | "#@if", | |
74 | "#@lambda", | |
75 | "#@let", | |
76 | "#@let*", | |
77 | "#@letrec", | |
78 | "#@or", | |
79 | "#@quote", | |
80 | "#@set!", | |
81 | "#@define", | |
82 | #if 0 | |
83 | "#@literal-variable-ref", | |
84 | "#@literal-variable-set!", | |
85 | #endif | |
86 | "#@apply", | |
87 | "#@call-with-current-continuation", | |
88 | ||
89 | /* user visible ISYMS */ | |
90 | /* other keywords */ | |
91 | /* Flags */ | |
92 | ||
93 | "#f", | |
94 | "#t", | |
95 | "#<undefined>", | |
96 | "#<eof>", | |
97 | "()", | |
98 | "#<unspecified>" | |
99 | }; | |
100 | ||
e6e4c9af | 101 | scm_option scm_print_opts[] = { |
b7ff98dd | 102 | { SCM_OPTION_SCM, "closure-hook", SCM_BOOL_F, |
84f6a34a MD |
103 | "Hook for printing closures." }, |
104 | { SCM_OPTION_BOOLEAN, "source", 0, | |
105 | "Print closures with source." } | |
e6e4c9af MD |
106 | }; |
107 | ||
b7ff98dd | 108 | SCM_PROC (s_print_options, "print-options-interface", 0, 1, 0, scm_print_options); |
1cc91f1b | 109 | |
e6e4c9af | 110 | SCM |
a51ea417 MD |
111 | scm_print_options (setting) |
112 | SCM setting; | |
e6e4c9af | 113 | { |
a51ea417 | 114 | SCM ans = scm_options (setting, |
b7ff98dd MD |
115 | scm_print_opts, |
116 | SCM_N_PRINT_OPTIONS, | |
117 | s_print_options); | |
e6e4c9af MD |
118 | return ans; |
119 | } | |
e6e4c9af | 120 | |
0f2d19dd JB |
121 | \f |
122 | /* {Printing of Scheme Objects} | |
123 | */ | |
124 | ||
a51ea417 | 125 | /* Detection of circular references. |
c62fbfe1 MD |
126 | * |
127 | * Due to other constraints in the implementation, this code has bad | |
128 | * time complexity (O (depth * N)), The printer code will be | |
129 | * completely rewritten before next release of Guile. The new code | |
130 | * will be O(N). | |
a51ea417 | 131 | */ |
c62fbfe1 | 132 | #define PUSH_REF(pstate, obj) \ |
a51ea417 | 133 | { \ |
c62fbfe1 MD |
134 | pstate->ref_stack[pstate->top++] = (obj); \ |
135 | if (pstate->top == pstate->ceiling) \ | |
136 | grow_ref_stack (pstate); \ | |
137 | } | |
a51ea417 | 138 | |
c62fbfe1 | 139 | #define ENTER_NESTED_DATA(pstate, obj, label) \ |
a51ea417 | 140 | { \ |
c62fbfe1 MD |
141 | register int i; \ |
142 | for (i = 0; i < pstate->top; ++i) \ | |
143 | if (pstate->ref_stack[i] == (obj)) \ | |
144 | goto label; \ | |
145 | if (pstate->fancyp) \ | |
146 | { \ | |
147 | if (pstate->top - pstate->list_offset >= pstate->level) \ | |
148 | { \ | |
149 | scm_gen_putc ('#', port); \ | |
150 | return; \ | |
151 | } \ | |
152 | } \ | |
153 | PUSH_REF(pstate, obj); \ | |
a51ea417 MD |
154 | } \ |
155 | ||
c62fbfe1 MD |
156 | #define EXIT_NESTED_DATA(pstate) { --pstate->top; } |
157 | ||
bb35f315 | 158 | SCM scm_print_state_vtable; |
c4f37e80 | 159 | |
bb35f315 | 160 | static SCM print_state_pool; |
c4f37e80 | 161 | |
f843a84c | 162 | #ifdef GUILE_DEBUG /* Used for debugging purposes */ |
c62fbfe1 | 163 | SCM_PROC(s_current_pstate, "current-pstate", 0, 0, 0, scm_current_pstate); |
1cc91f1b | 164 | |
c62fbfe1 MD |
165 | SCM |
166 | scm_current_pstate () | |
c62fbfe1 MD |
167 | { |
168 | return SCM_CADR (print_state_pool); | |
169 | } | |
170 | #endif | |
171 | ||
172 | #define PSTATE_SIZE 50L | |
173 | ||
698c0295 MD |
174 | static SCM make_print_state SCM_P ((void)); |
175 | ||
176 | static SCM | |
177 | make_print_state () | |
178 | { | |
179 | SCM print_state = scm_make_struct (SCM_CAR (print_state_pool), /* pstate type */ | |
bf685b6d | 180 | SCM_INUM0, |
698c0295 | 181 | SCM_EOL); |
bf685b6d MD |
182 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); |
183 | pstate->ref_vect = scm_make_vector (SCM_MAKINUM (PSTATE_SIZE), | |
184 | SCM_UNDEFINED, | |
185 | SCM_UNDEFINED); | |
186 | pstate->ref_stack = SCM_VELTS (pstate->ref_vect); | |
187 | pstate->ceiling = SCM_LENGTH (pstate->ref_vect); | |
698c0295 MD |
188 | return print_state; |
189 | } | |
1cc91f1b | 190 | |
c62fbfe1 MD |
191 | SCM |
192 | scm_make_print_state () | |
c62fbfe1 | 193 | { |
698c0295 MD |
194 | SCM answer = 0; |
195 | ||
196 | /* First try to allocate a print state from the pool */ | |
197 | SCM_DEFER_INTS; | |
198 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) | |
199 | { | |
200 | answer = SCM_CADR (print_state_pool); | |
201 | SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool)); | |
202 | } | |
203 | SCM_ALLOW_INTS; | |
204 | ||
205 | return answer ? answer : make_print_state (); | |
c62fbfe1 | 206 | } |
a51ea417 | 207 | |
4bfdf158 MD |
208 | static char s_print_state_printer[] = "print-state-printer"; |
209 | static SCM | |
210 | print_state_printer (obj, port) | |
211 | SCM obj; | |
212 | SCM port; | |
213 | { | |
214 | /* This function can be made visible by means of struct-ref, so | |
215 | we need to make sure that it gets what it wants. */ | |
216 | SCM_ASSERT (SCM_NIMP (obj) && SCM_PRINT_STATE_P (obj), | |
217 | obj, | |
218 | SCM_ARG1, | |
219 | s_print_state_printer); | |
220 | SCM_ASSERT (scm_valid_oport_value_p (port), | |
221 | port, | |
222 | SCM_ARG2, | |
223 | s_print_state_printer); | |
224 | port = SCM_COERCE_OPORT (port); | |
225 | scm_gen_puts (scm_regular_string, "#<print-state ", port); | |
226 | scm_intprint (obj, 16, port); | |
227 | scm_gen_putc ('>', port); | |
228 | return SCM_UNSPECIFIED; | |
229 | } | |
230 | ||
698c0295 MD |
231 | void |
232 | scm_free_print_state (print_state) | |
233 | SCM print_state; | |
234 | { | |
235 | SCM handle; | |
236 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); | |
237 | /* Cleanup before returning print state to pool. | |
238 | * It is better to do it here. Doing it in scm_prin1 | |
239 | * would cost more since that function is called much more | |
240 | * often. | |
241 | */ | |
242 | pstate->fancyp = 0; | |
bb35f315 | 243 | pstate->revealed = 0; |
698c0295 MD |
244 | SCM_NEWCELL (handle); |
245 | SCM_DEFER_INTS; | |
246 | SCM_SETCAR (handle, print_state); | |
247 | SCM_SETCDR (handle, SCM_CDR (print_state_pool)); | |
248 | SCM_SETCDR (print_state_pool, handle); | |
249 | SCM_ALLOW_INTS; | |
250 | } | |
1cc91f1b JB |
251 | |
252 | static void grow_ref_stack SCM_P ((scm_print_state *pstate)); | |
253 | ||
a51ea417 | 254 | static void |
c62fbfe1 MD |
255 | grow_ref_stack (pstate) |
256 | scm_print_state *pstate; | |
a51ea417 | 257 | { |
bf685b6d MD |
258 | int new_size = 2 * pstate->ceiling; |
259 | scm_vector_set_length_x (pstate->ref_vect, SCM_MAKINUM (new_size)); | |
260 | pstate->ref_stack = SCM_VELTS (pstate->ref_vect); | |
261 | pstate->ceiling = new_size; | |
a51ea417 MD |
262 | } |
263 | ||
1cc91f1b JB |
264 | |
265 | static void print_circref SCM_P ((SCM port, scm_print_state *pstate, SCM ref)); | |
266 | ||
a51ea417 | 267 | static void |
c62fbfe1 MD |
268 | print_circref (port, pstate, ref) |
269 | SCM port; | |
270 | scm_print_state *pstate; | |
271 | SCM ref; | |
a51ea417 | 272 | { |
c62fbfe1 MD |
273 | register int i; |
274 | int self = pstate->top - 1; | |
275 | i = pstate->top - 1; | |
276 | if (SCM_CONSP (pstate->ref_stack[i])) | |
277 | { | |
278 | while (i > 0) | |
279 | { | |
280 | if (SCM_NCONSP (pstate->ref_stack[i - 1]) | |
281 | || SCM_CDR (pstate->ref_stack[i - 1]) != pstate->ref_stack[i]) | |
282 | break; | |
283 | --i; | |
284 | } | |
285 | self = i; | |
286 | } | |
287 | for (i = pstate->top - 1; 1; --i) | |
288 | if (pstate->ref_stack[i] == ref) | |
289 | break; | |
290 | scm_gen_putc ('#', port); | |
291 | scm_intprint (i - self, 10, port); | |
292 | scm_gen_putc ('#', port); | |
a51ea417 MD |
293 | } |
294 | ||
c62fbfe1 | 295 | /* Print generally. Handles both write and display according to PSTATE. |
0f2d19dd | 296 | */ |
a51ea417 | 297 | |
1cc91f1b | 298 | |
0f2d19dd | 299 | void |
c62fbfe1 | 300 | scm_iprin1 (exp, port, pstate) |
0f2d19dd JB |
301 | SCM exp; |
302 | SCM port; | |
c62fbfe1 | 303 | scm_print_state *pstate; |
0f2d19dd JB |
304 | { |
305 | register long i; | |
306 | taloop: | |
307 | switch (7 & (int) exp) | |
308 | { | |
309 | case 2: | |
310 | case 6: | |
311 | scm_intprint (SCM_INUM (exp), 10, port); | |
312 | break; | |
313 | case 4: | |
314 | if (SCM_ICHRP (exp)) | |
315 | { | |
316 | i = SCM_ICHR (exp); | |
c62fbfe1 | 317 | scm_put_wchar (i, port, SCM_WRITINGP (pstate)); |
0f2d19dd JB |
318 | |
319 | } | |
a51ea417 | 320 | else if (SCM_IFLAGP (exp) |
0f2d19dd | 321 | && (SCM_ISYMNUM (exp) < (sizeof scm_isymnames / sizeof (char *)))) |
08b5b88c | 322 | scm_gen_puts (scm_regular_string, SCM_ISYMCHARS (exp), port); |
0f2d19dd JB |
323 | else if (SCM_ILOCP (exp)) |
324 | { | |
325 | scm_gen_puts (scm_regular_string, "#@", port); | |
326 | scm_intprint ((long) SCM_IFRAME (exp), 10, port); | |
327 | scm_gen_putc (SCM_ICDRP (exp) ? '-' : '+', port); | |
328 | scm_intprint ((long) SCM_IDIST (exp), 10, port); | |
329 | } | |
330 | else | |
331 | goto idef; | |
332 | break; | |
333 | case 1: | |
334 | /* gloc */ | |
335 | scm_gen_puts (scm_regular_string, "#@", port); | |
336 | exp = SCM_CAR (exp - 1); | |
337 | goto taloop; | |
338 | default: | |
339 | idef: | |
340 | scm_ipruk ("immediate", exp, port); | |
341 | break; | |
342 | case 0: | |
343 | switch (SCM_TYP7 (exp)) | |
344 | { | |
345 | case scm_tcs_cons_gloc: | |
346 | ||
347 | if (SCM_CDR (SCM_CAR (exp) - 1L) == 0) | |
348 | { | |
c4f37e80 | 349 | ENTER_NESTED_DATA (pstate, exp, circref); |
bafcafb2 | 350 | scm_print_struct (exp, port, pstate); |
c4f37e80 | 351 | EXIT_NESTED_DATA (pstate); |
0f2d19dd JB |
352 | break; |
353 | } | |
354 | ||
355 | case scm_tcs_cons_imcar: | |
356 | case scm_tcs_cons_nimcar: | |
c62fbfe1 MD |
357 | ENTER_NESTED_DATA (pstate, exp, circref); |
358 | scm_iprlist ("(", exp, ')', port, pstate); | |
359 | EXIT_NESTED_DATA (pstate); | |
a51ea417 MD |
360 | break; |
361 | circref: | |
c62fbfe1 | 362 | print_circref (port, pstate, exp); |
0f2d19dd | 363 | break; |
7332df66 | 364 | macros: |
80ea260c | 365 | if (!SCM_CLOSUREP (SCM_CDR (exp))) |
7332df66 | 366 | goto prinmacro; |
0f2d19dd | 367 | case scm_tcs_closures: |
7332df66 MD |
368 | /* The user supplied print closure procedure must handle |
369 | macro closures as well. */ | |
bb35f315 MV |
370 | if (SCM_FALSEP (scm_procedure_p (SCM_PRINT_CLOSURE)) |
371 | || SCM_FALSEP (scm_printer_apply (SCM_PRINT_CLOSURE, | |
372 | exp, port, pstate))); | |
373 | { | |
ba031394 | 374 | SCM name, code, env; |
bb35f315 MV |
375 | if (SCM_TYP16 (exp) == scm_tc16_macro) |
376 | { | |
377 | /* Printing a macro. */ | |
378 | prinmacro: | |
379 | name = scm_macro_name (exp); | |
380 | if (!SCM_CLOSUREP (SCM_CDR (exp))) | |
381 | { | |
f44dd64b | 382 | code = env = 0; |
bb35f315 MV |
383 | scm_gen_puts (scm_regular_string, "#<primitive-", |
384 | port); | |
385 | } | |
386 | else | |
387 | { | |
388 | code = SCM_CODE (SCM_CDR (exp)); | |
ba031394 | 389 | env = SCM_ENV (SCM_CDR (exp)); |
bb35f315 MV |
390 | scm_gen_puts (scm_regular_string, "#<", port); |
391 | } | |
392 | if (SCM_CAR (exp) & (3L << 16)) | |
393 | scm_gen_puts (scm_regular_string, "macro", port); | |
394 | else | |
395 | scm_gen_puts (scm_regular_string, "syntax", port); | |
396 | if (SCM_CAR (exp) & (2L << 16)) | |
397 | scm_gen_putc ('!', port); | |
398 | } | |
399 | else | |
400 | { | |
401 | /* Printing a closure. */ | |
402 | name = scm_procedure_name (exp); | |
403 | code = SCM_CODE (exp); | |
ba031394 | 404 | env = SCM_ENV (exp); |
bb35f315 MV |
405 | scm_gen_puts (scm_regular_string, "#<procedure", |
406 | port); | |
407 | } | |
408 | if (SCM_NIMP (name) && SCM_ROSTRINGP (name)) | |
409 | { | |
410 | scm_gen_putc (' ', port); | |
411 | scm_gen_puts (scm_regular_string, SCM_ROCHARS (name), port); | |
412 | } | |
413 | if (code) | |
414 | { | |
ba031394 MD |
415 | if (SCM_PRINT_SOURCE_P) |
416 | { | |
417 | code = scm_unmemocopy (code, | |
418 | SCM_EXTEND_ENV (SCM_CAR (code), | |
419 | SCM_EOL, | |
420 | env)); | |
421 | ENTER_NESTED_DATA (pstate, exp, circref); | |
422 | scm_iprlist (" ", code, '>', port, pstate); | |
423 | EXIT_NESTED_DATA (pstate); | |
424 | } | |
425 | else | |
426 | { | |
427 | if (SCM_TYP16 (exp) != scm_tc16_macro) | |
428 | { | |
429 | scm_gen_putc (' ', port); | |
430 | scm_iprin1 (SCM_CAR (code), port, pstate); | |
431 | } | |
432 | scm_gen_putc ('>', port); | |
433 | } | |
bb35f315 MV |
434 | } |
435 | else | |
436 | scm_gen_putc ('>', port); | |
437 | } | |
0f2d19dd JB |
438 | break; |
439 | case scm_tc7_mb_string: | |
440 | case scm_tc7_mb_substring: | |
c62fbfe1 | 441 | scm_print_mb_string (exp, port, SCM_WRITINGP (pstate)); |
0f2d19dd JB |
442 | break; |
443 | case scm_tc7_substring: | |
444 | case scm_tc7_string: | |
c62fbfe1 | 445 | if (SCM_WRITINGP (pstate)) |
0f2d19dd | 446 | { |
dbef8851 | 447 | scm_gen_putc ('"', port); |
0f2d19dd JB |
448 | for (i = 0; i < SCM_ROLENGTH (exp); ++i) |
449 | switch (SCM_ROCHARS (exp)[i]) | |
450 | { | |
dbef8851 | 451 | case '"': |
0f2d19dd JB |
452 | case '\\': |
453 | scm_gen_putc ('\\', port); | |
454 | default: | |
455 | scm_gen_putc (SCM_ROCHARS (exp)[i], port); | |
456 | } | |
dbef8851 | 457 | scm_gen_putc ('"', port); |
0f2d19dd JB |
458 | break; |
459 | } | |
460 | else | |
461 | scm_gen_write (scm_regular_string, SCM_ROCHARS (exp), | |
462 | (scm_sizet) SCM_ROLENGTH (exp), | |
463 | port); | |
464 | break; | |
465 | case scm_tcs_symbols: | |
466 | if (SCM_MB_STRINGP (exp)) | |
467 | { | |
468 | scm_print_mb_symbol (exp, port); | |
469 | break; | |
470 | } | |
471 | else | |
472 | { | |
473 | int pos; | |
474 | int end; | |
475 | int len; | |
476 | char * str; | |
477 | int weird; | |
478 | int maybe_weird; | |
4dc2435a | 479 | int mw_pos = 0; |
0f2d19dd JB |
480 | |
481 | len = SCM_LENGTH (exp); | |
482 | str = SCM_CHARS (exp); | |
483 | scm_remember (&exp); | |
484 | pos = 0; | |
485 | weird = 0; | |
486 | maybe_weird = 0; | |
487 | ||
488 | if (len == 0) | |
489 | scm_gen_write (scm_regular_string, "#{}#", 4, port); | |
490 | ||
491 | for (end = pos; end < len; ++end) | |
492 | switch (str[end]) | |
493 | { | |
494 | #ifdef BRACKETS_AS_PARENS | |
495 | case '[': | |
496 | case ']': | |
497 | #endif | |
498 | case '(': | |
499 | case ')': | |
dbef8851 | 500 | case '"': |
0f2d19dd JB |
501 | case ';': |
502 | case SCM_WHITE_SPACES: | |
503 | case SCM_LINE_INCREMENTORS: | |
504 | weird_handler: | |
505 | if (maybe_weird) | |
506 | { | |
507 | end = mw_pos; | |
508 | maybe_weird = 0; | |
509 | } | |
510 | if (!weird) | |
511 | { | |
512 | scm_gen_write (scm_regular_string, "#{", 2, port); | |
513 | weird = 1; | |
514 | } | |
515 | if (pos < end) | |
516 | { | |
517 | scm_gen_write (scm_regular_string, str + pos, end - pos, port); | |
518 | } | |
519 | { | |
520 | char buf[2]; | |
521 | buf[0] = '\\'; | |
522 | buf[1] = str[end]; | |
523 | scm_gen_write (scm_regular_string, buf, 2, port); | |
524 | } | |
525 | pos = end + 1; | |
526 | break; | |
527 | case '\\': | |
528 | if (weird) | |
529 | goto weird_handler; | |
530 | if (!maybe_weird) | |
531 | { | |
532 | maybe_weird = 1; | |
533 | mw_pos = pos; | |
534 | } | |
535 | break; | |
536 | case '}': | |
537 | case '#': | |
538 | if (weird) | |
539 | goto weird_handler; | |
540 | break; | |
541 | default: | |
542 | break; | |
543 | } | |
544 | if (pos < end) | |
545 | scm_gen_write (scm_regular_string, str + pos, end - pos, port); | |
546 | if (weird) | |
547 | scm_gen_write (scm_regular_string, "}#", 2, port); | |
548 | break; | |
549 | } | |
550 | case scm_tc7_wvect: | |
c62fbfe1 | 551 | ENTER_NESTED_DATA (pstate, exp, circref); |
0f2d19dd JB |
552 | if (SCM_IS_WHVEC (exp)) |
553 | scm_gen_puts (scm_regular_string, "#wh(", port); | |
554 | else | |
555 | scm_gen_puts (scm_regular_string, "#w(", port); | |
556 | goto common_vector_printer; | |
557 | ||
558 | case scm_tc7_vector: | |
c62fbfe1 | 559 | ENTER_NESTED_DATA (pstate, exp, circref); |
0f2d19dd JB |
560 | scm_gen_puts (scm_regular_string, "#(", port); |
561 | common_vector_printer: | |
9fbaf27c MD |
562 | { |
563 | int last = SCM_LENGTH (exp) - 1; | |
564 | int cutp = 0; | |
565 | if (pstate->fancyp && SCM_LENGTH (exp) > pstate->length) | |
566 | { | |
567 | last = pstate->length - 1; | |
568 | cutp = 1; | |
569 | } | |
570 | for (i = 0; i < last; ++i) | |
571 | { | |
572 | /* CHECK_INTS; */ | |
573 | scm_iprin1 (SCM_VELTS (exp)[i], port, pstate); | |
574 | scm_gen_putc (' ', port); | |
575 | } | |
576 | if (i == last) | |
577 | { | |
578 | /* CHECK_INTS; */ | |
579 | scm_iprin1 (SCM_VELTS (exp)[i], port, pstate); | |
580 | } | |
581 | if (cutp) | |
582 | scm_gen_puts (scm_regular_string, " ...", port); | |
583 | scm_gen_putc (')', port); | |
584 | } | |
c62fbfe1 | 585 | EXIT_NESTED_DATA (pstate); |
0f2d19dd JB |
586 | break; |
587 | case scm_tc7_bvect: | |
588 | case scm_tc7_byvect: | |
589 | case scm_tc7_svect: | |
590 | case scm_tc7_ivect: | |
591 | case scm_tc7_uvect: | |
592 | case scm_tc7_fvect: | |
593 | case scm_tc7_dvect: | |
594 | case scm_tc7_cvect: | |
595 | #ifdef LONGLONGS | |
596 | case scm_tc7_llvect: | |
597 | #endif | |
c62fbfe1 | 598 | scm_raprin1 (exp, port, pstate); |
0f2d19dd JB |
599 | break; |
600 | case scm_tcs_subrs: | |
601 | scm_gen_puts (scm_regular_string, "#<primitive-procedure ", port); | |
602 | scm_gen_puts ((SCM_MB_STRINGP (SCM_SNAME(exp)) | |
603 | ? scm_mb_string | |
604 | : scm_regular_string), | |
605 | SCM_CHARS (SCM_SNAME (exp)), port); | |
606 | scm_gen_putc ('>', port); | |
607 | break; | |
608 | #ifdef CCLO | |
609 | case scm_tc7_cclo: | |
610 | scm_gen_puts (scm_regular_string, "#<compiled-closure ", port); | |
c62fbfe1 | 611 | scm_iprin1 (SCM_CCLO_SUBR (exp), port, pstate); |
0f2d19dd JB |
612 | scm_gen_putc ('>', port); |
613 | break; | |
614 | #endif | |
615 | case scm_tc7_contin: | |
616 | scm_gen_puts (scm_regular_string, "#<continuation ", port); | |
617 | scm_intprint (SCM_LENGTH (exp), 10, port); | |
618 | scm_gen_puts (scm_regular_string, " @ ", port); | |
619 | scm_intprint ((long) SCM_CHARS (exp), 16, port); | |
620 | scm_gen_putc ('>', port); | |
621 | break; | |
622 | case scm_tc7_port: | |
623 | i = SCM_PTOBNUM (exp); | |
c62fbfe1 MD |
624 | if (i < scm_numptob |
625 | && scm_ptobs[i].print | |
626 | && (scm_ptobs[i].print) (exp, port, pstate)) | |
0f2d19dd JB |
627 | break; |
628 | goto punk; | |
629 | case scm_tc7_smob: | |
c62fbfe1 | 630 | ENTER_NESTED_DATA (pstate, exp, circref); |
0f2d19dd JB |
631 | i = SCM_SMOBNUM (exp); |
632 | if (i < scm_numsmob && scm_smobs[i].print | |
c62fbfe1 | 633 | && (scm_smobs[i].print) (exp, port, pstate)) |
a51ea417 | 634 | { |
c62fbfe1 | 635 | EXIT_NESTED_DATA (pstate); |
a51ea417 MD |
636 | break; |
637 | } | |
c62fbfe1 | 638 | EXIT_NESTED_DATA (pstate); |
7332df66 MD |
639 | /* Macros have their print field set to NULL. They are |
640 | handled at the same place as closures in order to achieve | |
641 | non-redundancy. Placing the condition here won't slow | |
642 | down printing of other smobs. */ | |
643 | if (SCM_TYP16 (exp) == scm_tc16_macro) | |
644 | goto macros; | |
0f2d19dd | 645 | default: |
a51ea417 MD |
646 | punk: |
647 | scm_ipruk ("type", exp, port); | |
0f2d19dd JB |
648 | } |
649 | } | |
650 | } | |
651 | ||
c62fbfe1 MD |
652 | /* Print states are necessary for circular reference safe printing. |
653 | * They are also expensive to allocate. Therefore print states are | |
654 | * kept in a pool so that they can be reused. | |
655 | */ | |
1cc91f1b | 656 | |
bb35f315 MV |
657 | /* The PORT argument can also be a print-state/port pair, which will |
658 | * then be used instead of allocating a new print state. This is | |
659 | * useful for continuing a chain of print calls from Scheme. */ | |
660 | ||
a51ea417 | 661 | void |
c62fbfe1 | 662 | scm_prin1 (exp, port, writingp) |
a51ea417 MD |
663 | SCM exp; |
664 | SCM port; | |
c62fbfe1 | 665 | int writingp; |
a51ea417 | 666 | { |
c4f37e80 MV |
667 | SCM handle = SCM_BOOL_F; /* Will GC protect the handle whilst unlinked */ |
668 | SCM pstate_scm; | |
c62fbfe1 MD |
669 | scm_print_state *pstate; |
670 | ||
bb35f315 MV |
671 | /* If PORT is a print-state/port pair, use that. Else create a new |
672 | print-state. */ | |
c4f37e80 | 673 | |
bb35f315 MV |
674 | if (SCM_NIMP (port) && SCM_CONSP (port)) |
675 | { | |
676 | pstate_scm = SCM_CDR (port); | |
677 | port = SCM_CAR (port); | |
678 | } | |
679 | else | |
c62fbfe1 | 680 | { |
c4f37e80 MV |
681 | /* First try to allocate a print state from the pool */ |
682 | SCM_DEFER_INTS; | |
683 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) | |
684 | { | |
685 | handle = SCM_CDR (print_state_pool); | |
686 | SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool)); | |
687 | } | |
688 | SCM_ALLOW_INTS; | |
689 | if (handle == SCM_BOOL_F) | |
690 | handle = scm_cons (make_print_state (), SCM_EOL); | |
691 | pstate_scm = SCM_CAR (handle); | |
c62fbfe1 | 692 | } |
c62fbfe1 | 693 | |
c4f37e80 | 694 | pstate = SCM_PRINT_STATE (pstate_scm); |
c62fbfe1 MD |
695 | pstate->writingp = writingp; |
696 | scm_iprin1 (exp, port, pstate); | |
697 | ||
bb35f315 MV |
698 | /* Return print state to pool if it has been created above and |
699 | hasn't escaped to Scheme. */ | |
700 | ||
701 | if (handle != SCM_BOOL_F && !pstate->revealed) | |
c4f37e80 MV |
702 | { |
703 | SCM_DEFER_INTS; | |
704 | SCM_SETCDR (handle, SCM_CDR (print_state_pool)); | |
705 | SCM_SETCDR (print_state_pool, handle); | |
706 | SCM_ALLOW_INTS; | |
707 | } | |
a51ea417 MD |
708 | } |
709 | ||
0f2d19dd JB |
710 | |
711 | /* Print an integer. | |
712 | */ | |
1cc91f1b | 713 | |
0f2d19dd JB |
714 | void |
715 | scm_intprint (n, radix, port) | |
716 | long n; | |
717 | int radix; | |
718 | SCM port; | |
0f2d19dd JB |
719 | { |
720 | char num_buf[SCM_INTBUFLEN]; | |
721 | scm_gen_write (scm_regular_string, num_buf, scm_iint2str (n, radix, num_buf), port); | |
722 | } | |
723 | ||
724 | /* Print an object of unrecognized type. | |
725 | */ | |
1cc91f1b | 726 | |
0f2d19dd JB |
727 | void |
728 | scm_ipruk (hdr, ptr, port) | |
729 | char *hdr; | |
730 | SCM ptr; | |
731 | SCM port; | |
0f2d19dd JB |
732 | { |
733 | scm_gen_puts (scm_regular_string, "#<unknown-", port); | |
734 | scm_gen_puts (scm_regular_string, hdr, port); | |
735 | if (SCM_CELLP (ptr)) | |
736 | { | |
737 | scm_gen_puts (scm_regular_string, " (0x", port); | |
738 | scm_intprint (SCM_CAR (ptr), 16, port); | |
739 | scm_gen_puts (scm_regular_string, " . 0x", port); | |
740 | scm_intprint (SCM_CDR (ptr), 16, port); | |
741 | scm_gen_puts (scm_regular_string, ") @", port); | |
742 | } | |
743 | scm_gen_puts (scm_regular_string, " 0x", port); | |
744 | scm_intprint (ptr, 16, port); | |
745 | scm_gen_putc ('>', port); | |
746 | } | |
747 | ||
748 | /* Print a list. | |
749 | */ | |
a51ea417 | 750 | |
1cc91f1b | 751 | |
0f2d19dd | 752 | void |
c62fbfe1 | 753 | scm_iprlist (hdr, exp, tlr, port, pstate) |
0f2d19dd JB |
754 | char *hdr; |
755 | SCM exp; | |
805df3e8 | 756 | int tlr; |
0f2d19dd | 757 | SCM port; |
c62fbfe1 | 758 | scm_print_state *pstate; |
0f2d19dd | 759 | { |
c62fbfe1 MD |
760 | register int i; |
761 | register SCM hare, tortoise; | |
762 | int floor = pstate->top - 2; | |
0f2d19dd JB |
763 | scm_gen_puts (scm_regular_string, hdr, port); |
764 | /* CHECK_INTS; */ | |
c62fbfe1 MD |
765 | if (pstate->fancyp) |
766 | goto fancy_printing; | |
767 | ||
768 | /* Run a hare and tortoise so that total time complexity will be | |
769 | O(depth * N) instead of O(N^2). */ | |
770 | hare = SCM_CDR (exp); | |
771 | tortoise = exp; | |
2fab3faa | 772 | while (SCM_NIMP (hare) && SCM_ECONSP (hare)) |
c62fbfe1 MD |
773 | { |
774 | if (hare == tortoise) | |
775 | goto fancy_printing; | |
776 | hare = SCM_CDR (hare); | |
2fab3faa | 777 | if (SCM_IMP (hare) || SCM_NECONSP (hare)) |
c62fbfe1 MD |
778 | break; |
779 | hare = SCM_CDR (hare); | |
780 | tortoise = SCM_CDR (tortoise); | |
781 | } | |
782 | ||
783 | /* No cdr cycles intrinsic to this list */ | |
784 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
0f2d19dd JB |
785 | exp = SCM_CDR (exp); |
786 | for (; SCM_NIMP (exp); exp = SCM_CDR (exp)) | |
787 | { | |
788 | if (SCM_NECONSP (exp)) | |
789 | break; | |
c62fbfe1 MD |
790 | for (i = floor; i >= 0; --i) |
791 | if (pstate->ref_stack[i] == exp) | |
792 | goto circref; | |
793 | PUSH_REF (pstate, exp); | |
0f2d19dd JB |
794 | scm_gen_putc (' ', port); |
795 | /* CHECK_INTS; */ | |
c62fbfe1 | 796 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
0f2d19dd JB |
797 | } |
798 | if (SCM_NNULLP (exp)) | |
799 | { | |
800 | scm_gen_puts (scm_regular_string, " . ", port); | |
c62fbfe1 | 801 | scm_iprin1 (exp, port, pstate); |
0f2d19dd | 802 | } |
c62fbfe1 | 803 | |
a51ea417 | 804 | end: |
0f2d19dd | 805 | scm_gen_putc (tlr, port); |
c62fbfe1 | 806 | pstate->top = floor + 2; |
a51ea417 | 807 | return; |
c62fbfe1 MD |
808 | |
809 | fancy_printing: | |
810 | { | |
811 | int n = pstate->length; | |
812 | ||
813 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
814 | exp = SCM_CDR (exp); --n; | |
815 | for (; SCM_NIMP (exp); exp = SCM_CDR (exp)) | |
816 | { | |
817 | if (SCM_NECONSP (exp)) | |
818 | break; | |
819 | for (i = 0; i < pstate->top; ++i) | |
820 | if (pstate->ref_stack[i] == exp) | |
821 | goto fancy_circref; | |
822 | if (pstate->fancyp) | |
823 | { | |
824 | if (n == 0) | |
825 | { | |
826 | scm_gen_puts (scm_regular_string, " ...", port); | |
827 | goto skip_tail; | |
828 | } | |
829 | else | |
830 | --n; | |
831 | } | |
832 | PUSH_REF(pstate, exp); | |
833 | ++pstate->list_offset; | |
834 | scm_gen_putc (' ', port); | |
835 | /* CHECK_INTS; */ | |
836 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
837 | } | |
838 | } | |
839 | if (SCM_NNULLP (exp)) | |
840 | { | |
841 | scm_gen_puts (scm_regular_string, " . ", port); | |
842 | scm_iprin1 (exp, port, pstate); | |
843 | } | |
844 | skip_tail: | |
845 | pstate->list_offset -= pstate->top - floor - 2; | |
a51ea417 | 846 | goto end; |
a51ea417 | 847 | |
c62fbfe1 MD |
848 | fancy_circref: |
849 | pstate->list_offset -= pstate->top - floor - 2; | |
850 | ||
851 | circref: | |
852 | scm_gen_puts (scm_regular_string, " . ", port); | |
853 | print_circref (port, pstate, exp); | |
854 | goto end; | |
0f2d19dd JB |
855 | } |
856 | ||
857 | \f | |
858 | ||
bb35f315 MV |
859 | int |
860 | scm_valid_oport_value_p (SCM val) | |
861 | { | |
4bfdf158 MD |
862 | return (SCM_NIMP (val) |
863 | && (SCM_OPOUTPORTP (val) | |
864 | || (SCM_CONSP (val) | |
865 | && SCM_NIMP (SCM_CAR (val)) | |
866 | && SCM_OPOUTPORTP (SCM_CAR (val)) | |
867 | && SCM_NIMP (SCM_CDR (val)) | |
868 | && SCM_PRINT_STATE_P (SCM_CDR (val))))); | |
bb35f315 MV |
869 | } |
870 | ||
0f2d19dd | 871 | SCM_PROC(s_write, "write", 1, 1, 0, scm_write); |
1cc91f1b | 872 | |
0f2d19dd JB |
873 | SCM |
874 | scm_write (obj, port) | |
875 | SCM obj; | |
876 | SCM port; | |
0f2d19dd JB |
877 | { |
878 | if (SCM_UNBNDP (port)) | |
879 | port = scm_cur_outp; | |
880 | else | |
bb35f315 MV |
881 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_write); |
882 | ||
a51ea417 | 883 | scm_prin1 (obj, port, 1); |
0f2d19dd JB |
884 | #ifdef HAVE_PIPE |
885 | # ifdef EPIPE | |
886 | if (EPIPE == errno) | |
887 | scm_close_port (port); | |
888 | # endif | |
889 | #endif | |
890 | return SCM_UNSPECIFIED; | |
891 | } | |
892 | ||
893 | ||
894 | SCM_PROC(s_display, "display", 1, 1, 0, scm_display); | |
1cc91f1b | 895 | |
0f2d19dd JB |
896 | SCM |
897 | scm_display (obj, port) | |
898 | SCM obj; | |
899 | SCM port; | |
0f2d19dd JB |
900 | { |
901 | if (SCM_UNBNDP (port)) | |
902 | port = scm_cur_outp; | |
903 | else | |
bb35f315 MV |
904 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_display); |
905 | ||
a51ea417 | 906 | scm_prin1 (obj, port, 0); |
0f2d19dd JB |
907 | #ifdef HAVE_PIPE |
908 | # ifdef EPIPE | |
909 | if (EPIPE == errno) | |
910 | scm_close_port (port); | |
911 | # endif | |
912 | #endif | |
913 | return SCM_UNSPECIFIED; | |
914 | } | |
915 | ||
916 | SCM_PROC(s_newline, "newline", 0, 1, 0, scm_newline); | |
1cc91f1b | 917 | |
0f2d19dd JB |
918 | SCM |
919 | scm_newline (port) | |
920 | SCM port; | |
0f2d19dd JB |
921 | { |
922 | if (SCM_UNBNDP (port)) | |
bb35f315 | 923 | port = scm_cur_outp; |
0f2d19dd | 924 | else |
bb35f315 MV |
925 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG1, s_newline); |
926 | ||
927 | scm_gen_putc ('\n', SCM_COERCE_OPORT (port)); | |
0f2d19dd JB |
928 | #ifdef HAVE_PIPE |
929 | # ifdef EPIPE | |
930 | if (EPIPE == errno) | |
931 | scm_close_port (port); | |
932 | else | |
933 | # endif | |
934 | #endif | |
935 | if (port == scm_cur_outp) | |
936 | scm_fflush (port); | |
937 | return SCM_UNSPECIFIED; | |
938 | } | |
939 | ||
940 | SCM_PROC(s_write_char, "write-char", 1, 1, 0, scm_write_char); | |
1cc91f1b | 941 | |
0f2d19dd JB |
942 | SCM |
943 | scm_write_char (chr, port) | |
944 | SCM chr; | |
945 | SCM port; | |
0f2d19dd JB |
946 | { |
947 | if (SCM_UNBNDP (port)) | |
bb35f315 | 948 | port = scm_cur_outp; |
0f2d19dd | 949 | else |
bb35f315 MV |
950 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_write_char); |
951 | ||
0f2d19dd | 952 | SCM_ASSERT (SCM_ICHRP (chr), chr, SCM_ARG1, s_write_char); |
bb35f315 | 953 | scm_gen_putc ((int) SCM_ICHR (chr), SCM_COERCE_OPORT (port)); |
0f2d19dd JB |
954 | #ifdef HAVE_PIPE |
955 | # ifdef EPIPE | |
956 | if (EPIPE == errno) | |
957 | scm_close_port (port); | |
958 | # endif | |
959 | #endif | |
960 | return SCM_UNSPECIFIED; | |
961 | } | |
962 | ||
0f2d19dd JB |
963 | \f |
964 | ||
bb35f315 MV |
965 | /* Call back to Scheme code to do the printing of special objects |
966 | (like structs). SCM_PRINTER_APPLY applies PROC to EXP and a pair | |
967 | containing PORT and PSTATE. This pair can be used as the port for | |
968 | display/write etc to continue the current print chain. The REVEALED | |
969 | field of PSTATE is set to true to indicate that the print state has | |
970 | escaped to Scheme and thus has to be freed by the GC. */ | |
c4f37e80 MV |
971 | |
972 | SCM | |
973 | scm_printer_apply (proc, exp, port, pstate) | |
974 | SCM proc, exp, port; | |
975 | scm_print_state *pstate; | |
976 | { | |
bb35f315 MV |
977 | SCM pair = scm_cons (port, pstate->handle); |
978 | pstate->revealed = 1; | |
979 | return scm_apply (proc, exp, scm_cons (pair, scm_listofnull)); | |
c4f37e80 | 980 | } |
bb35f315 | 981 | |
c4f37e80 | 982 | \f |
1cc91f1b | 983 | |
0f2d19dd JB |
984 | void |
985 | scm_init_print () | |
0f2d19dd | 986 | { |
4bfdf158 MD |
987 | SCM vtable, layout, printer, type; |
988 | ||
b7ff98dd | 989 | scm_init_opts (scm_print_options, scm_print_opts, SCM_N_PRINT_OPTIONS); |
4bfdf158 MD |
990 | vtable = scm_make_vtable_vtable (scm_make_struct_layout (scm_nullstr), |
991 | SCM_INUM0, | |
992 | SCM_EOL); | |
993 | layout = scm_make_struct_layout (scm_makfrom0str (SCM_PRINT_STATE_LAYOUT)); | |
994 | printer = scm_make_subr_opt (s_print_state_printer, | |
995 | scm_tc7_subr_2, | |
996 | (SCM (*) ()) print_state_printer, | |
997 | 0 /* Don't bind the name. */); | |
998 | type = scm_make_struct (vtable, SCM_INUM0, SCM_LIST2 (layout, printer)); | |
c62fbfe1 | 999 | print_state_pool = scm_permanent_object (scm_cons (type, SCM_EOL)); |
c4f37e80 | 1000 | |
bb35f315 | 1001 | scm_print_state_vtable = type; |
c4f37e80 | 1002 | |
0f2d19dd JB |
1003 | #include "print.x" |
1004 | } |