Commit | Line | Data |
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7dc6e754 | 1 | /* Copyright (C) 1995,1996,1997,1998 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" | |
20e6290e JB |
47 | #include "smob.h" |
48 | #include "eval.h" | |
ddeae7ca | 49 | #include "macros.h" |
20e6290e JB |
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 | { \ |
5ca6dc39 | 141 | register unsigned long i; \ |
c62fbfe1 MD |
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 | { \ | |
b7f3516f | 149 | scm_putc ('#', port); \ |
c62fbfe1 MD |
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), | |
bf685b6d MD |
184 | SCM_UNDEFINED); |
185 | pstate->ref_stack = SCM_VELTS (pstate->ref_vect); | |
186 | pstate->ceiling = SCM_LENGTH (pstate->ref_vect); | |
698c0295 MD |
187 | return print_state; |
188 | } | |
1cc91f1b | 189 | |
c62fbfe1 MD |
190 | SCM |
191 | scm_make_print_state () | |
c62fbfe1 | 192 | { |
698c0295 MD |
193 | SCM answer = 0; |
194 | ||
195 | /* First try to allocate a print state from the pool */ | |
196 | SCM_DEFER_INTS; | |
197 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) | |
198 | { | |
199 | answer = SCM_CADR (print_state_pool); | |
200 | SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool)); | |
201 | } | |
202 | SCM_ALLOW_INTS; | |
203 | ||
204 | return answer ? answer : make_print_state (); | |
c62fbfe1 | 205 | } |
a51ea417 | 206 | |
4bfdf158 MD |
207 | static char s_print_state_printer[] = "print-state-printer"; |
208 | static SCM | |
209 | print_state_printer (obj, port) | |
210 | SCM obj; | |
211 | SCM port; | |
212 | { | |
213 | /* This function can be made visible by means of struct-ref, so | |
214 | we need to make sure that it gets what it wants. */ | |
215 | SCM_ASSERT (SCM_NIMP (obj) && SCM_PRINT_STATE_P (obj), | |
216 | obj, | |
217 | SCM_ARG1, | |
218 | s_print_state_printer); | |
219 | SCM_ASSERT (scm_valid_oport_value_p (port), | |
220 | port, | |
221 | SCM_ARG2, | |
222 | s_print_state_printer); | |
0ef4ae82 | 223 | port = SCM_COERCE_OUTPORT (port); |
b7f3516f | 224 | scm_puts ("#<print-state ", port); |
4bfdf158 | 225 | scm_intprint (obj, 16, port); |
b7f3516f | 226 | scm_putc ('>', port); |
4bfdf158 MD |
227 | return SCM_UNSPECIFIED; |
228 | } | |
229 | ||
698c0295 MD |
230 | void |
231 | scm_free_print_state (print_state) | |
232 | SCM print_state; | |
233 | { | |
234 | SCM handle; | |
235 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); | |
236 | /* Cleanup before returning print state to pool. | |
237 | * It is better to do it here. Doing it in scm_prin1 | |
238 | * would cost more since that function is called much more | |
239 | * often. | |
240 | */ | |
241 | pstate->fancyp = 0; | |
bb35f315 | 242 | pstate->revealed = 0; |
698c0295 MD |
243 | SCM_NEWCELL (handle); |
244 | SCM_DEFER_INTS; | |
245 | SCM_SETCAR (handle, print_state); | |
246 | SCM_SETCDR (handle, SCM_CDR (print_state_pool)); | |
247 | SCM_SETCDR (print_state_pool, handle); | |
248 | SCM_ALLOW_INTS; | |
249 | } | |
1cc91f1b JB |
250 | |
251 | static void grow_ref_stack SCM_P ((scm_print_state *pstate)); | |
252 | ||
a51ea417 | 253 | static void |
c62fbfe1 MD |
254 | grow_ref_stack (pstate) |
255 | scm_print_state *pstate; | |
a51ea417 | 256 | { |
bf685b6d MD |
257 | int new_size = 2 * pstate->ceiling; |
258 | scm_vector_set_length_x (pstate->ref_vect, SCM_MAKINUM (new_size)); | |
259 | pstate->ref_stack = SCM_VELTS (pstate->ref_vect); | |
260 | pstate->ceiling = new_size; | |
a51ea417 MD |
261 | } |
262 | ||
1cc91f1b JB |
263 | |
264 | static void print_circref SCM_P ((SCM port, scm_print_state *pstate, SCM ref)); | |
265 | ||
a51ea417 | 266 | static void |
c62fbfe1 MD |
267 | print_circref (port, pstate, ref) |
268 | SCM port; | |
269 | scm_print_state *pstate; | |
270 | SCM ref; | |
a51ea417 | 271 | { |
c62fbfe1 MD |
272 | register int i; |
273 | int self = pstate->top - 1; | |
274 | i = pstate->top - 1; | |
275 | if (SCM_CONSP (pstate->ref_stack[i])) | |
276 | { | |
277 | while (i > 0) | |
278 | { | |
279 | if (SCM_NCONSP (pstate->ref_stack[i - 1]) | |
280 | || SCM_CDR (pstate->ref_stack[i - 1]) != pstate->ref_stack[i]) | |
281 | break; | |
282 | --i; | |
283 | } | |
284 | self = i; | |
285 | } | |
286 | for (i = pstate->top - 1; 1; --i) | |
287 | if (pstate->ref_stack[i] == ref) | |
288 | break; | |
b7f3516f | 289 | scm_putc ('#', port); |
c62fbfe1 | 290 | scm_intprint (i - self, 10, port); |
b7f3516f | 291 | scm_putc ('#', port); |
a51ea417 MD |
292 | } |
293 | ||
c62fbfe1 | 294 | /* Print generally. Handles both write and display according to PSTATE. |
0f2d19dd | 295 | */ |
a51ea417 | 296 | |
1cc91f1b | 297 | |
0f2d19dd | 298 | void |
c62fbfe1 | 299 | scm_iprin1 (exp, port, pstate) |
0f2d19dd JB |
300 | SCM exp; |
301 | SCM port; | |
c62fbfe1 | 302 | scm_print_state *pstate; |
0f2d19dd | 303 | { |
0f2d19dd JB |
304 | taloop: |
305 | switch (7 & (int) exp) | |
306 | { | |
307 | case 2: | |
308 | case 6: | |
309 | scm_intprint (SCM_INUM (exp), 10, port); | |
310 | break; | |
311 | case 4: | |
312 | if (SCM_ICHRP (exp)) | |
313 | { | |
5ca6dc39 JB |
314 | register long i; |
315 | ||
0f2d19dd | 316 | i = SCM_ICHR (exp); |
b7f3516f TT |
317 | if (SCM_WRITINGP (pstate)) |
318 | { | |
319 | scm_puts ("#\\", port); | |
320 | if ((i >= 0) && (i <= ' ') && scm_charnames[i]) | |
321 | scm_puts (scm_charnames[i], port); | |
322 | else if (i < 0 || i > '\177') | |
323 | scm_intprint (i, 8, port); | |
324 | else | |
325 | scm_putc (i, port); | |
326 | } | |
327 | else | |
328 | scm_putc (i, port); | |
0f2d19dd | 329 | } |
a51ea417 | 330 | else if (SCM_IFLAGP (exp) |
5ca6dc39 | 331 | && ((size_t) SCM_ISYMNUM (exp) < (sizeof scm_isymnames / sizeof (char *)))) |
b7f3516f | 332 | scm_puts (SCM_ISYMCHARS (exp), port); |
0f2d19dd JB |
333 | else if (SCM_ILOCP (exp)) |
334 | { | |
b7f3516f | 335 | scm_puts ("#@", port); |
0f2d19dd | 336 | scm_intprint ((long) SCM_IFRAME (exp), 10, port); |
b7f3516f | 337 | scm_putc (SCM_ICDRP (exp) ? '-' : '+', port); |
0f2d19dd JB |
338 | scm_intprint ((long) SCM_IDIST (exp), 10, port); |
339 | } | |
340 | else | |
341 | goto idef; | |
342 | break; | |
343 | case 1: | |
344 | /* gloc */ | |
b7f3516f | 345 | scm_puts ("#@", port); |
0f2d19dd JB |
346 | exp = SCM_CAR (exp - 1); |
347 | goto taloop; | |
348 | default: | |
349 | idef: | |
350 | scm_ipruk ("immediate", exp, port); | |
351 | break; | |
352 | case 0: | |
353 | switch (SCM_TYP7 (exp)) | |
354 | { | |
355 | case scm_tcs_cons_gloc: | |
356 | ||
357 | if (SCM_CDR (SCM_CAR (exp) - 1L) == 0) | |
358 | { | |
c4f37e80 | 359 | ENTER_NESTED_DATA (pstate, exp, circref); |
bafcafb2 | 360 | scm_print_struct (exp, port, pstate); |
c4f37e80 | 361 | EXIT_NESTED_DATA (pstate); |
0f2d19dd JB |
362 | break; |
363 | } | |
364 | ||
365 | case scm_tcs_cons_imcar: | |
366 | case scm_tcs_cons_nimcar: | |
c62fbfe1 MD |
367 | ENTER_NESTED_DATA (pstate, exp, circref); |
368 | scm_iprlist ("(", exp, ')', port, pstate); | |
369 | EXIT_NESTED_DATA (pstate); | |
a51ea417 MD |
370 | break; |
371 | circref: | |
c62fbfe1 | 372 | print_circref (port, pstate, exp); |
0f2d19dd | 373 | break; |
7332df66 | 374 | macros: |
80ea260c | 375 | if (!SCM_CLOSUREP (SCM_CDR (exp))) |
7332df66 | 376 | goto prinmacro; |
0f2d19dd | 377 | case scm_tcs_closures: |
7332df66 MD |
378 | /* The user supplied print closure procedure must handle |
379 | macro closures as well. */ | |
bb35f315 MV |
380 | if (SCM_FALSEP (scm_procedure_p (SCM_PRINT_CLOSURE)) |
381 | || SCM_FALSEP (scm_printer_apply (SCM_PRINT_CLOSURE, | |
77c25af7 | 382 | exp, port, pstate))) |
bb35f315 | 383 | { |
ba031394 | 384 | SCM name, code, env; |
bb35f315 MV |
385 | if (SCM_TYP16 (exp) == scm_tc16_macro) |
386 | { | |
387 | /* Printing a macro. */ | |
388 | prinmacro: | |
389 | name = scm_macro_name (exp); | |
390 | if (!SCM_CLOSUREP (SCM_CDR (exp))) | |
391 | { | |
f44dd64b | 392 | code = env = 0; |
b7f3516f | 393 | scm_puts ("#<primitive-", port); |
bb35f315 MV |
394 | } |
395 | else | |
396 | { | |
397 | code = SCM_CODE (SCM_CDR (exp)); | |
ba031394 | 398 | env = SCM_ENV (SCM_CDR (exp)); |
b7f3516f | 399 | scm_puts ("#<", port); |
bb35f315 MV |
400 | } |
401 | if (SCM_CAR (exp) & (3L << 16)) | |
b7f3516f | 402 | scm_puts ("macro", port); |
bb35f315 | 403 | else |
b7f3516f | 404 | scm_puts ("syntax", port); |
bb35f315 | 405 | if (SCM_CAR (exp) & (2L << 16)) |
b7f3516f | 406 | scm_putc ('!', port); |
bb35f315 MV |
407 | } |
408 | else | |
409 | { | |
410 | /* Printing a closure. */ | |
411 | name = scm_procedure_name (exp); | |
412 | code = SCM_CODE (exp); | |
ba031394 | 413 | env = SCM_ENV (exp); |
b7f3516f | 414 | scm_puts ("#<procedure", port); |
bb35f315 MV |
415 | } |
416 | if (SCM_NIMP (name) && SCM_ROSTRINGP (name)) | |
417 | { | |
b7f3516f TT |
418 | scm_putc (' ', port); |
419 | scm_puts (SCM_ROCHARS (name), port); | |
bb35f315 MV |
420 | } |
421 | if (code) | |
422 | { | |
ba031394 MD |
423 | if (SCM_PRINT_SOURCE_P) |
424 | { | |
425 | code = scm_unmemocopy (code, | |
426 | SCM_EXTEND_ENV (SCM_CAR (code), | |
427 | SCM_EOL, | |
428 | env)); | |
429 | ENTER_NESTED_DATA (pstate, exp, circref); | |
430 | scm_iprlist (" ", code, '>', port, pstate); | |
431 | EXIT_NESTED_DATA (pstate); | |
432 | } | |
433 | else | |
434 | { | |
435 | if (SCM_TYP16 (exp) != scm_tc16_macro) | |
436 | { | |
b7f3516f | 437 | scm_putc (' ', port); |
ba031394 MD |
438 | scm_iprin1 (SCM_CAR (code), port, pstate); |
439 | } | |
b7f3516f | 440 | scm_putc ('>', port); |
ba031394 | 441 | } |
bb35f315 MV |
442 | } |
443 | else | |
b7f3516f | 444 | scm_putc ('>', port); |
bb35f315 | 445 | } |
0f2d19dd | 446 | break; |
0f2d19dd JB |
447 | case scm_tc7_substring: |
448 | case scm_tc7_string: | |
c62fbfe1 | 449 | if (SCM_WRITINGP (pstate)) |
0f2d19dd | 450 | { |
5ca6dc39 JB |
451 | scm_sizet i; |
452 | ||
b7f3516f | 453 | scm_putc ('"', port); |
0f2d19dd JB |
454 | for (i = 0; i < SCM_ROLENGTH (exp); ++i) |
455 | switch (SCM_ROCHARS (exp)[i]) | |
456 | { | |
dbef8851 | 457 | case '"': |
0f2d19dd | 458 | case '\\': |
b7f3516f | 459 | scm_putc ('\\', port); |
0f2d19dd | 460 | default: |
b7f3516f | 461 | scm_putc (SCM_ROCHARS (exp)[i], port); |
0f2d19dd | 462 | } |
b7f3516f | 463 | scm_putc ('"', port); |
0f2d19dd JB |
464 | break; |
465 | } | |
466 | else | |
b7f3516f TT |
467 | scm_lfwrite (SCM_ROCHARS (exp), (scm_sizet) SCM_ROLENGTH (exp), |
468 | port); | |
0f2d19dd JB |
469 | break; |
470 | case scm_tcs_symbols: | |
0f2d19dd JB |
471 | { |
472 | int pos; | |
473 | int end; | |
474 | int len; | |
475 | char * str; | |
476 | int weird; | |
477 | int maybe_weird; | |
4dc2435a | 478 | int mw_pos = 0; |
0f2d19dd JB |
479 | |
480 | len = SCM_LENGTH (exp); | |
481 | str = SCM_CHARS (exp); | |
482 | scm_remember (&exp); | |
483 | pos = 0; | |
484 | weird = 0; | |
485 | maybe_weird = 0; | |
486 | ||
487 | if (len == 0) | |
b7f3516f | 488 | scm_lfwrite ("#{}#", 4, port); |
0f2d19dd JB |
489 | |
490 | for (end = pos; end < len; ++end) | |
491 | switch (str[end]) | |
492 | { | |
493 | #ifdef BRACKETS_AS_PARENS | |
494 | case '[': | |
495 | case ']': | |
496 | #endif | |
497 | case '(': | |
498 | case ')': | |
dbef8851 | 499 | case '"': |
0f2d19dd JB |
500 | case ';': |
501 | case SCM_WHITE_SPACES: | |
502 | case SCM_LINE_INCREMENTORS: | |
503 | weird_handler: | |
504 | if (maybe_weird) | |
505 | { | |
506 | end = mw_pos; | |
507 | maybe_weird = 0; | |
508 | } | |
509 | if (!weird) | |
510 | { | |
b7f3516f | 511 | scm_lfwrite ("#{", 2, port); |
0f2d19dd JB |
512 | weird = 1; |
513 | } | |
514 | if (pos < end) | |
515 | { | |
b7f3516f | 516 | scm_lfwrite (str + pos, end - pos, port); |
0f2d19dd JB |
517 | } |
518 | { | |
519 | char buf[2]; | |
520 | buf[0] = '\\'; | |
521 | buf[1] = str[end]; | |
b7f3516f | 522 | scm_lfwrite (buf, 2, port); |
0f2d19dd JB |
523 | } |
524 | pos = end + 1; | |
525 | break; | |
526 | case '\\': | |
527 | if (weird) | |
528 | goto weird_handler; | |
529 | if (!maybe_weird) | |
530 | { | |
531 | maybe_weird = 1; | |
532 | mw_pos = pos; | |
533 | } | |
534 | break; | |
535 | case '}': | |
536 | case '#': | |
537 | if (weird) | |
538 | goto weird_handler; | |
539 | break; | |
540 | default: | |
541 | break; | |
542 | } | |
543 | if (pos < end) | |
b7f3516f | 544 | scm_lfwrite (str + pos, end - pos, port); |
0f2d19dd | 545 | if (weird) |
b7f3516f | 546 | scm_lfwrite ("}#", 2, port); |
0f2d19dd JB |
547 | break; |
548 | } | |
549 | case scm_tc7_wvect: | |
c62fbfe1 | 550 | ENTER_NESTED_DATA (pstate, exp, circref); |
0f2d19dd | 551 | if (SCM_IS_WHVEC (exp)) |
b7f3516f | 552 | scm_puts ("#wh(", port); |
0f2d19dd | 553 | else |
b7f3516f | 554 | scm_puts ("#w(", port); |
0f2d19dd JB |
555 | goto common_vector_printer; |
556 | ||
557 | case scm_tc7_vector: | |
c62fbfe1 | 558 | ENTER_NESTED_DATA (pstate, exp, circref); |
b7f3516f | 559 | scm_puts ("#(", port); |
0f2d19dd | 560 | common_vector_printer: |
9fbaf27c | 561 | { |
5ca6dc39 | 562 | register long i; |
9fbaf27c MD |
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); | |
b7f3516f | 574 | scm_putc (' ', port); |
9fbaf27c MD |
575 | } |
576 | if (i == last) | |
577 | { | |
578 | /* CHECK_INTS; */ | |
579 | scm_iprin1 (SCM_VELTS (exp)[i], port, pstate); | |
580 | } | |
581 | if (cutp) | |
b7f3516f TT |
582 | scm_puts (" ...", port); |
583 | scm_putc (')', port); | |
9fbaf27c | 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: | |
b7f3516f TT |
601 | scm_puts ("#<primitive-procedure ", port); |
602 | scm_puts (SCM_CHARS (SCM_SNAME (exp)), port); | |
603 | scm_putc ('>', port); | |
0f2d19dd JB |
604 | break; |
605 | #ifdef CCLO | |
606 | case scm_tc7_cclo: | |
56977059 MD |
607 | { |
608 | SCM proc = SCM_CCLO_SUBR (exp); | |
609 | if (proc == scm_f_gsubr_apply) | |
610 | { | |
611 | /* Print gsubrs as primitives */ | |
c180dfd3 | 612 | SCM name = scm_procedure_name (exp); |
56977059 MD |
613 | scm_puts ("#<primitive-procedure", port); |
614 | if (SCM_NFALSEP (name)) | |
615 | { | |
616 | scm_putc (' ', port); | |
617 | scm_puts (SCM_CHARS (name), port); | |
618 | } | |
619 | } | |
620 | else | |
621 | { | |
622 | scm_puts ("#<compiled-closure ", port); | |
623 | scm_iprin1 (proc, port, pstate); | |
624 | } | |
625 | scm_putc ('>', port); | |
626 | } | |
0f2d19dd JB |
627 | break; |
628 | #endif | |
c180dfd3 MD |
629 | case scm_tc7_pws: |
630 | scm_puts ("#<procedure-with-setter", port); | |
631 | { | |
632 | SCM name = scm_procedure_name (exp); | |
633 | if (SCM_NFALSEP (name)) | |
634 | { | |
635 | scm_putc (' ', port); | |
636 | scm_puts (SCM_ROCHARS (name), port); | |
637 | } | |
638 | } | |
639 | scm_putc ('>', port); | |
640 | break; | |
0f2d19dd | 641 | case scm_tc7_contin: |
b7f3516f | 642 | scm_puts ("#<continuation ", port); |
0f2d19dd | 643 | scm_intprint (SCM_LENGTH (exp), 10, port); |
b7f3516f | 644 | scm_puts (" @ ", port); |
0f2d19dd | 645 | scm_intprint ((long) SCM_CHARS (exp), 16, port); |
b7f3516f | 646 | scm_putc ('>', port); |
0f2d19dd JB |
647 | break; |
648 | case scm_tc7_port: | |
5ca6dc39 JB |
649 | { |
650 | register long i = SCM_PTOBNUM (exp); | |
651 | if (i < scm_numptob | |
652 | && scm_ptobs[i].print | |
653 | && (scm_ptobs[i].print) (exp, port, pstate)) | |
a51ea417 | 654 | break; |
5ca6dc39 JB |
655 | goto punk; |
656 | } | |
657 | case scm_tc7_smob: | |
658 | { | |
659 | register long i; | |
660 | ENTER_NESTED_DATA (pstate, exp, circref); | |
661 | i = SCM_SMOBNUM (exp); | |
662 | if (i < scm_numsmob && scm_smobs[i].print | |
663 | && (scm_smobs[i].print) (exp, port, pstate)) | |
664 | { | |
665 | EXIT_NESTED_DATA (pstate); | |
666 | break; | |
667 | } | |
668 | EXIT_NESTED_DATA (pstate); | |
669 | /* Macros have their print field set to NULL. They are | |
670 | handled at the same place as closures in order to achieve | |
671 | non-redundancy. Placing the condition here won't slow | |
672 | down printing of other smobs. */ | |
673 | if (SCM_TYP16 (exp) == scm_tc16_macro) | |
674 | goto macros; | |
675 | } | |
0f2d19dd | 676 | default: |
a51ea417 MD |
677 | punk: |
678 | scm_ipruk ("type", exp, port); | |
0f2d19dd JB |
679 | } |
680 | } | |
681 | } | |
682 | ||
c62fbfe1 MD |
683 | /* Print states are necessary for circular reference safe printing. |
684 | * They are also expensive to allocate. Therefore print states are | |
685 | * kept in a pool so that they can be reused. | |
686 | */ | |
1cc91f1b | 687 | |
bb35f315 MV |
688 | /* The PORT argument can also be a print-state/port pair, which will |
689 | * then be used instead of allocating a new print state. This is | |
690 | * useful for continuing a chain of print calls from Scheme. */ | |
691 | ||
a51ea417 | 692 | void |
c62fbfe1 | 693 | scm_prin1 (exp, port, writingp) |
a51ea417 MD |
694 | SCM exp; |
695 | SCM port; | |
c62fbfe1 | 696 | int writingp; |
a51ea417 | 697 | { |
c4f37e80 MV |
698 | SCM handle = SCM_BOOL_F; /* Will GC protect the handle whilst unlinked */ |
699 | SCM pstate_scm; | |
c62fbfe1 MD |
700 | scm_print_state *pstate; |
701 | ||
bb35f315 MV |
702 | /* If PORT is a print-state/port pair, use that. Else create a new |
703 | print-state. */ | |
c4f37e80 | 704 | |
bb35f315 MV |
705 | if (SCM_NIMP (port) && SCM_CONSP (port)) |
706 | { | |
707 | pstate_scm = SCM_CDR (port); | |
708 | port = SCM_CAR (port); | |
709 | } | |
710 | else | |
c62fbfe1 | 711 | { |
c4f37e80 MV |
712 | /* First try to allocate a print state from the pool */ |
713 | SCM_DEFER_INTS; | |
714 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) | |
715 | { | |
716 | handle = SCM_CDR (print_state_pool); | |
717 | SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool)); | |
718 | } | |
719 | SCM_ALLOW_INTS; | |
720 | if (handle == SCM_BOOL_F) | |
721 | handle = scm_cons (make_print_state (), SCM_EOL); | |
722 | pstate_scm = SCM_CAR (handle); | |
c62fbfe1 | 723 | } |
c62fbfe1 | 724 | |
c4f37e80 | 725 | pstate = SCM_PRINT_STATE (pstate_scm); |
c62fbfe1 MD |
726 | pstate->writingp = writingp; |
727 | scm_iprin1 (exp, port, pstate); | |
728 | ||
bb35f315 MV |
729 | /* Return print state to pool if it has been created above and |
730 | hasn't escaped to Scheme. */ | |
731 | ||
732 | if (handle != SCM_BOOL_F && !pstate->revealed) | |
c4f37e80 MV |
733 | { |
734 | SCM_DEFER_INTS; | |
735 | SCM_SETCDR (handle, SCM_CDR (print_state_pool)); | |
736 | SCM_SETCDR (print_state_pool, handle); | |
737 | SCM_ALLOW_INTS; | |
738 | } | |
a51ea417 MD |
739 | } |
740 | ||
0f2d19dd JB |
741 | |
742 | /* Print an integer. | |
743 | */ | |
1cc91f1b | 744 | |
0f2d19dd JB |
745 | void |
746 | scm_intprint (n, radix, port) | |
747 | long n; | |
748 | int radix; | |
749 | SCM port; | |
0f2d19dd JB |
750 | { |
751 | char num_buf[SCM_INTBUFLEN]; | |
b7f3516f | 752 | scm_lfwrite (num_buf, scm_iint2str (n, radix, num_buf), port); |
0f2d19dd JB |
753 | } |
754 | ||
755 | /* Print an object of unrecognized type. | |
756 | */ | |
1cc91f1b | 757 | |
0f2d19dd JB |
758 | void |
759 | scm_ipruk (hdr, ptr, port) | |
760 | char *hdr; | |
761 | SCM ptr; | |
762 | SCM port; | |
0f2d19dd | 763 | { |
b7f3516f TT |
764 | scm_puts ("#<unknown-", port); |
765 | scm_puts (hdr, port); | |
0f2d19dd JB |
766 | if (SCM_CELLP (ptr)) |
767 | { | |
b7f3516f | 768 | scm_puts (" (0x", port); |
0f2d19dd | 769 | scm_intprint (SCM_CAR (ptr), 16, port); |
b7f3516f | 770 | scm_puts (" . 0x", port); |
0f2d19dd | 771 | scm_intprint (SCM_CDR (ptr), 16, port); |
b7f3516f | 772 | scm_puts (") @", port); |
0f2d19dd | 773 | } |
b7f3516f | 774 | scm_puts (" 0x", port); |
0f2d19dd | 775 | scm_intprint (ptr, 16, port); |
b7f3516f | 776 | scm_putc ('>', port); |
0f2d19dd JB |
777 | } |
778 | ||
779 | /* Print a list. | |
780 | */ | |
a51ea417 | 781 | |
1cc91f1b | 782 | |
0f2d19dd | 783 | void |
c62fbfe1 | 784 | scm_iprlist (hdr, exp, tlr, port, pstate) |
0f2d19dd JB |
785 | char *hdr; |
786 | SCM exp; | |
805df3e8 | 787 | int tlr; |
0f2d19dd | 788 | SCM port; |
c62fbfe1 | 789 | scm_print_state *pstate; |
0f2d19dd | 790 | { |
c62fbfe1 MD |
791 | register SCM hare, tortoise; |
792 | int floor = pstate->top - 2; | |
b7f3516f | 793 | scm_puts (hdr, port); |
0f2d19dd | 794 | /* CHECK_INTS; */ |
c62fbfe1 MD |
795 | if (pstate->fancyp) |
796 | goto fancy_printing; | |
797 | ||
798 | /* Run a hare and tortoise so that total time complexity will be | |
799 | O(depth * N) instead of O(N^2). */ | |
800 | hare = SCM_CDR (exp); | |
801 | tortoise = exp; | |
2fab3faa | 802 | while (SCM_NIMP (hare) && SCM_ECONSP (hare)) |
c62fbfe1 MD |
803 | { |
804 | if (hare == tortoise) | |
805 | goto fancy_printing; | |
806 | hare = SCM_CDR (hare); | |
2fab3faa | 807 | if (SCM_IMP (hare) || SCM_NECONSP (hare)) |
c62fbfe1 MD |
808 | break; |
809 | hare = SCM_CDR (hare); | |
810 | tortoise = SCM_CDR (tortoise); | |
811 | } | |
812 | ||
813 | /* No cdr cycles intrinsic to this list */ | |
814 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
0f2d19dd JB |
815 | exp = SCM_CDR (exp); |
816 | for (; SCM_NIMP (exp); exp = SCM_CDR (exp)) | |
817 | { | |
5ca6dc39 JB |
818 | register int i; |
819 | ||
0f2d19dd JB |
820 | if (SCM_NECONSP (exp)) |
821 | break; | |
c62fbfe1 MD |
822 | for (i = floor; i >= 0; --i) |
823 | if (pstate->ref_stack[i] == exp) | |
824 | goto circref; | |
825 | PUSH_REF (pstate, exp); | |
b7f3516f | 826 | scm_putc (' ', port); |
0f2d19dd | 827 | /* CHECK_INTS; */ |
c62fbfe1 | 828 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
0f2d19dd JB |
829 | } |
830 | if (SCM_NNULLP (exp)) | |
831 | { | |
b7f3516f | 832 | scm_puts (" . ", port); |
c62fbfe1 | 833 | scm_iprin1 (exp, port, pstate); |
0f2d19dd | 834 | } |
c62fbfe1 | 835 | |
a51ea417 | 836 | end: |
b7f3516f | 837 | scm_putc (tlr, port); |
c62fbfe1 | 838 | pstate->top = floor + 2; |
a51ea417 | 839 | return; |
c62fbfe1 MD |
840 | |
841 | fancy_printing: | |
842 | { | |
843 | int n = pstate->length; | |
844 | ||
845 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
846 | exp = SCM_CDR (exp); --n; | |
847 | for (; SCM_NIMP (exp); exp = SCM_CDR (exp)) | |
848 | { | |
5ca6dc39 JB |
849 | register unsigned long i; |
850 | ||
c62fbfe1 MD |
851 | if (SCM_NECONSP (exp)) |
852 | break; | |
853 | for (i = 0; i < pstate->top; ++i) | |
854 | if (pstate->ref_stack[i] == exp) | |
855 | goto fancy_circref; | |
856 | if (pstate->fancyp) | |
857 | { | |
858 | if (n == 0) | |
859 | { | |
b7f3516f | 860 | scm_puts (" ...", port); |
c62fbfe1 MD |
861 | goto skip_tail; |
862 | } | |
863 | else | |
864 | --n; | |
865 | } | |
866 | PUSH_REF(pstate, exp); | |
867 | ++pstate->list_offset; | |
b7f3516f | 868 | scm_putc (' ', port); |
c62fbfe1 MD |
869 | /* CHECK_INTS; */ |
870 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
871 | } | |
872 | } | |
873 | if (SCM_NNULLP (exp)) | |
874 | { | |
b7f3516f | 875 | scm_puts (" . ", port); |
c62fbfe1 MD |
876 | scm_iprin1 (exp, port, pstate); |
877 | } | |
878 | skip_tail: | |
879 | pstate->list_offset -= pstate->top - floor - 2; | |
a51ea417 | 880 | goto end; |
a51ea417 | 881 | |
c62fbfe1 MD |
882 | fancy_circref: |
883 | pstate->list_offset -= pstate->top - floor - 2; | |
884 | ||
885 | circref: | |
b7f3516f | 886 | scm_puts (" . ", port); |
c62fbfe1 MD |
887 | print_circref (port, pstate, exp); |
888 | goto end; | |
0f2d19dd JB |
889 | } |
890 | ||
891 | \f | |
892 | ||
bb35f315 MV |
893 | int |
894 | scm_valid_oport_value_p (SCM val) | |
895 | { | |
4bfdf158 MD |
896 | return (SCM_NIMP (val) |
897 | && (SCM_OPOUTPORTP (val) | |
898 | || (SCM_CONSP (val) | |
899 | && SCM_NIMP (SCM_CAR (val)) | |
900 | && SCM_OPOUTPORTP (SCM_CAR (val)) | |
901 | && SCM_NIMP (SCM_CDR (val)) | |
902 | && SCM_PRINT_STATE_P (SCM_CDR (val))))); | |
bb35f315 MV |
903 | } |
904 | ||
0f2d19dd | 905 | SCM_PROC(s_write, "write", 1, 1, 0, scm_write); |
1cc91f1b | 906 | |
0f2d19dd JB |
907 | SCM |
908 | scm_write (obj, port) | |
909 | SCM obj; | |
910 | SCM port; | |
0f2d19dd JB |
911 | { |
912 | if (SCM_UNBNDP (port)) | |
913 | port = scm_cur_outp; | |
914 | else | |
bb35f315 MV |
915 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_write); |
916 | ||
a51ea417 | 917 | scm_prin1 (obj, port, 1); |
0f2d19dd JB |
918 | #ifdef HAVE_PIPE |
919 | # ifdef EPIPE | |
920 | if (EPIPE == errno) | |
921 | scm_close_port (port); | |
922 | # endif | |
923 | #endif | |
924 | return SCM_UNSPECIFIED; | |
925 | } | |
926 | ||
927 | ||
928 | SCM_PROC(s_display, "display", 1, 1, 0, scm_display); | |
1cc91f1b | 929 | |
0f2d19dd JB |
930 | SCM |
931 | scm_display (obj, port) | |
932 | SCM obj; | |
933 | SCM port; | |
0f2d19dd JB |
934 | { |
935 | if (SCM_UNBNDP (port)) | |
936 | port = scm_cur_outp; | |
937 | else | |
bb35f315 MV |
938 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_display); |
939 | ||
a51ea417 | 940 | scm_prin1 (obj, port, 0); |
0f2d19dd JB |
941 | #ifdef HAVE_PIPE |
942 | # ifdef EPIPE | |
943 | if (EPIPE == errno) | |
944 | scm_close_port (port); | |
945 | # endif | |
946 | #endif | |
947 | return SCM_UNSPECIFIED; | |
948 | } | |
949 | ||
950 | SCM_PROC(s_newline, "newline", 0, 1, 0, scm_newline); | |
1cc91f1b | 951 | |
0f2d19dd JB |
952 | SCM |
953 | scm_newline (port) | |
954 | SCM port; | |
0f2d19dd JB |
955 | { |
956 | if (SCM_UNBNDP (port)) | |
bb35f315 | 957 | port = scm_cur_outp; |
0f2d19dd | 958 | else |
bb35f315 MV |
959 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG1, s_newline); |
960 | ||
0ef4ae82 | 961 | scm_putc ('\n', SCM_COERCE_OUTPORT (port)); |
0f2d19dd JB |
962 | #ifdef HAVE_PIPE |
963 | # ifdef EPIPE | |
964 | if (EPIPE == errno) | |
965 | scm_close_port (port); | |
966 | else | |
967 | # endif | |
968 | #endif | |
969 | if (port == scm_cur_outp) | |
970 | scm_fflush (port); | |
971 | return SCM_UNSPECIFIED; | |
972 | } | |
973 | ||
974 | SCM_PROC(s_write_char, "write-char", 1, 1, 0, scm_write_char); | |
1cc91f1b | 975 | |
0f2d19dd JB |
976 | SCM |
977 | scm_write_char (chr, port) | |
978 | SCM chr; | |
979 | SCM port; | |
0f2d19dd JB |
980 | { |
981 | if (SCM_UNBNDP (port)) | |
bb35f315 | 982 | port = scm_cur_outp; |
0f2d19dd | 983 | else |
bb35f315 MV |
984 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_write_char); |
985 | ||
0f2d19dd | 986 | SCM_ASSERT (SCM_ICHRP (chr), chr, SCM_ARG1, s_write_char); |
0ef4ae82 | 987 | scm_putc ((int) SCM_ICHR (chr), SCM_COERCE_OUTPORT (port)); |
0f2d19dd JB |
988 | #ifdef HAVE_PIPE |
989 | # ifdef EPIPE | |
990 | if (EPIPE == errno) | |
991 | scm_close_port (port); | |
992 | # endif | |
993 | #endif | |
994 | return SCM_UNSPECIFIED; | |
995 | } | |
996 | ||
0f2d19dd JB |
997 | \f |
998 | ||
bb35f315 MV |
999 | /* Call back to Scheme code to do the printing of special objects |
1000 | (like structs). SCM_PRINTER_APPLY applies PROC to EXP and a pair | |
1001 | containing PORT and PSTATE. This pair can be used as the port for | |
1002 | display/write etc to continue the current print chain. The REVEALED | |
1003 | field of PSTATE is set to true to indicate that the print state has | |
1004 | escaped to Scheme and thus has to be freed by the GC. */ | |
c4f37e80 MV |
1005 | |
1006 | SCM | |
1007 | scm_printer_apply (proc, exp, port, pstate) | |
1008 | SCM proc, exp, port; | |
1009 | scm_print_state *pstate; | |
1010 | { | |
bb35f315 MV |
1011 | SCM pair = scm_cons (port, pstate->handle); |
1012 | pstate->revealed = 1; | |
1013 | return scm_apply (proc, exp, scm_cons (pair, scm_listofnull)); | |
c4f37e80 | 1014 | } |
bb35f315 | 1015 | |
c4f37e80 | 1016 | \f |
1cc91f1b | 1017 | |
0f2d19dd JB |
1018 | void |
1019 | scm_init_print () | |
0f2d19dd | 1020 | { |
4bfdf158 MD |
1021 | SCM vtable, layout, printer, type; |
1022 | ||
b7ff98dd | 1023 | scm_init_opts (scm_print_options, scm_print_opts, SCM_N_PRINT_OPTIONS); |
4bfdf158 MD |
1024 | vtable = scm_make_vtable_vtable (scm_make_struct_layout (scm_nullstr), |
1025 | SCM_INUM0, | |
1026 | SCM_EOL); | |
1027 | layout = scm_make_struct_layout (scm_makfrom0str (SCM_PRINT_STATE_LAYOUT)); | |
1028 | printer = scm_make_subr_opt (s_print_state_printer, | |
1029 | scm_tc7_subr_2, | |
1030 | (SCM (*) ()) print_state_printer, | |
1031 | 0 /* Don't bind the name. */); | |
1032 | type = scm_make_struct (vtable, SCM_INUM0, SCM_LIST2 (layout, printer)); | |
c62fbfe1 | 1033 | print_state_pool = scm_permanent_object (scm_cons (type, SCM_EOL)); |
c4f37e80 | 1034 | |
bb35f315 | 1035 | scm_print_state_vtable = type; |
c4f37e80 | 1036 | |
0f2d19dd JB |
1037 | #include "print.x" |
1038 | } |