Commit | Line | Data |
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0f2d19dd JB |
1 | /* Copyright (C) 1995,1996 Free Software Foundation, Inc. |
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 | |
15 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
16 | * | |
17 | * As a special exception, the Free Software Foundation gives permission | |
18 | * for additional uses of the text contained in its release of GUILE. | |
19 | * | |
20 | * The exception is that, if you link the GUILE library with other files | |
21 | * to produce an executable, this does not by itself cause the | |
22 | * resulting executable to be covered by the GNU General Public License. | |
23 | * Your use of that executable is in no way restricted on account of | |
24 | * linking the GUILE library code into it. | |
25 | * | |
26 | * This exception does not however invalidate any other reasons why | |
27 | * the executable file might be covered by the GNU General Public License. | |
28 | * | |
29 | * This exception applies only to the code released by the | |
30 | * Free Software Foundation under the name GUILE. If you copy | |
31 | * code from other Free Software Foundation releases into a copy of | |
32 | * GUILE, as the General Public License permits, the exception does | |
33 | * not apply to the code that you add in this way. To avoid misleading | |
34 | * anyone as to the status of such modified files, you must delete | |
35 | * this exception notice from them. | |
36 | * | |
37 | * If you write modifications of your own for GUILE, it is your choice | |
38 | * whether to permit this exception to apply to your modifications. | |
39 | * If you do not wish that, delete this exception notice. | |
40 | */ | |
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 | ||
158 | static SCM print_state_pool; | |
159 | ||
160 | #if 1 /* Used for debugging purposes */ | |
161 | SCM_PROC(s_current_pstate, "current-pstate", 0, 0, 0, scm_current_pstate); | |
1cc91f1b | 162 | |
c62fbfe1 MD |
163 | SCM |
164 | scm_current_pstate () | |
c62fbfe1 MD |
165 | { |
166 | return SCM_CADR (print_state_pool); | |
167 | } | |
168 | #endif | |
169 | ||
170 | #define PSTATE_SIZE 50L | |
171 | ||
698c0295 MD |
172 | static SCM make_print_state SCM_P ((void)); |
173 | ||
174 | static SCM | |
175 | make_print_state () | |
176 | { | |
177 | SCM print_state = scm_make_struct (SCM_CAR (print_state_pool), /* pstate type */ | |
bf685b6d | 178 | SCM_INUM0, |
698c0295 | 179 | SCM_EOL); |
bf685b6d MD |
180 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); |
181 | pstate->ref_vect = scm_make_vector (SCM_MAKINUM (PSTATE_SIZE), | |
182 | SCM_UNDEFINED, | |
183 | SCM_UNDEFINED); | |
184 | pstate->ref_stack = SCM_VELTS (pstate->ref_vect); | |
185 | pstate->ceiling = SCM_LENGTH (pstate->ref_vect); | |
698c0295 MD |
186 | return print_state; |
187 | } | |
1cc91f1b | 188 | |
c62fbfe1 MD |
189 | SCM |
190 | scm_make_print_state () | |
c62fbfe1 | 191 | { |
698c0295 MD |
192 | SCM answer = 0; |
193 | ||
194 | /* First try to allocate a print state from the pool */ | |
195 | SCM_DEFER_INTS; | |
196 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) | |
197 | { | |
198 | answer = SCM_CADR (print_state_pool); | |
199 | SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool)); | |
200 | } | |
201 | SCM_ALLOW_INTS; | |
202 | ||
203 | return answer ? answer : make_print_state (); | |
c62fbfe1 | 204 | } |
a51ea417 | 205 | |
698c0295 MD |
206 | void |
207 | scm_free_print_state (print_state) | |
208 | SCM print_state; | |
209 | { | |
210 | SCM handle; | |
211 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); | |
212 | /* Cleanup before returning print state to pool. | |
213 | * It is better to do it here. Doing it in scm_prin1 | |
214 | * would cost more since that function is called much more | |
215 | * often. | |
216 | */ | |
217 | pstate->fancyp = 0; | |
218 | SCM_NEWCELL (handle); | |
219 | SCM_DEFER_INTS; | |
220 | SCM_SETCAR (handle, print_state); | |
221 | SCM_SETCDR (handle, SCM_CDR (print_state_pool)); | |
222 | SCM_SETCDR (print_state_pool, handle); | |
223 | SCM_ALLOW_INTS; | |
224 | } | |
1cc91f1b JB |
225 | |
226 | static void grow_ref_stack SCM_P ((scm_print_state *pstate)); | |
227 | ||
a51ea417 | 228 | static void |
c62fbfe1 MD |
229 | grow_ref_stack (pstate) |
230 | scm_print_state *pstate; | |
a51ea417 | 231 | { |
bf685b6d MD |
232 | int new_size = 2 * pstate->ceiling; |
233 | scm_vector_set_length_x (pstate->ref_vect, SCM_MAKINUM (new_size)); | |
234 | pstate->ref_stack = SCM_VELTS (pstate->ref_vect); | |
235 | pstate->ceiling = new_size; | |
a51ea417 MD |
236 | } |
237 | ||
1cc91f1b JB |
238 | |
239 | static void print_circref SCM_P ((SCM port, scm_print_state *pstate, SCM ref)); | |
240 | ||
a51ea417 | 241 | static void |
c62fbfe1 MD |
242 | print_circref (port, pstate, ref) |
243 | SCM port; | |
244 | scm_print_state *pstate; | |
245 | SCM ref; | |
a51ea417 | 246 | { |
c62fbfe1 MD |
247 | register int i; |
248 | int self = pstate->top - 1; | |
249 | i = pstate->top - 1; | |
250 | if (SCM_CONSP (pstate->ref_stack[i])) | |
251 | { | |
252 | while (i > 0) | |
253 | { | |
254 | if (SCM_NCONSP (pstate->ref_stack[i - 1]) | |
255 | || SCM_CDR (pstate->ref_stack[i - 1]) != pstate->ref_stack[i]) | |
256 | break; | |
257 | --i; | |
258 | } | |
259 | self = i; | |
260 | } | |
261 | for (i = pstate->top - 1; 1; --i) | |
262 | if (pstate->ref_stack[i] == ref) | |
263 | break; | |
264 | scm_gen_putc ('#', port); | |
265 | scm_intprint (i - self, 10, port); | |
266 | scm_gen_putc ('#', port); | |
a51ea417 MD |
267 | } |
268 | ||
c62fbfe1 | 269 | /* Print generally. Handles both write and display according to PSTATE. |
0f2d19dd | 270 | */ |
a51ea417 | 271 | |
1cc91f1b | 272 | |
0f2d19dd | 273 | void |
c62fbfe1 | 274 | scm_iprin1 (exp, port, pstate) |
0f2d19dd JB |
275 | SCM exp; |
276 | SCM port; | |
c62fbfe1 | 277 | scm_print_state *pstate; |
0f2d19dd JB |
278 | { |
279 | register long i; | |
280 | taloop: | |
281 | switch (7 & (int) exp) | |
282 | { | |
283 | case 2: | |
284 | case 6: | |
285 | scm_intprint (SCM_INUM (exp), 10, port); | |
286 | break; | |
287 | case 4: | |
288 | if (SCM_ICHRP (exp)) | |
289 | { | |
290 | i = SCM_ICHR (exp); | |
c62fbfe1 | 291 | scm_put_wchar (i, port, SCM_WRITINGP (pstate)); |
0f2d19dd JB |
292 | |
293 | } | |
a51ea417 | 294 | else if (SCM_IFLAGP (exp) |
0f2d19dd | 295 | && (SCM_ISYMNUM (exp) < (sizeof scm_isymnames / sizeof (char *)))) |
08b5b88c | 296 | scm_gen_puts (scm_regular_string, SCM_ISYMCHARS (exp), port); |
0f2d19dd JB |
297 | else if (SCM_ILOCP (exp)) |
298 | { | |
299 | scm_gen_puts (scm_regular_string, "#@", port); | |
300 | scm_intprint ((long) SCM_IFRAME (exp), 10, port); | |
301 | scm_gen_putc (SCM_ICDRP (exp) ? '-' : '+', port); | |
302 | scm_intprint ((long) SCM_IDIST (exp), 10, port); | |
303 | } | |
304 | else | |
305 | goto idef; | |
306 | break; | |
307 | case 1: | |
308 | /* gloc */ | |
309 | scm_gen_puts (scm_regular_string, "#@", port); | |
310 | exp = SCM_CAR (exp - 1); | |
311 | goto taloop; | |
312 | default: | |
313 | idef: | |
314 | scm_ipruk ("immediate", exp, port); | |
315 | break; | |
316 | case 0: | |
317 | switch (SCM_TYP7 (exp)) | |
318 | { | |
319 | case scm_tcs_cons_gloc: | |
320 | ||
321 | if (SCM_CDR (SCM_CAR (exp) - 1L) == 0) | |
322 | { | |
a51ea417 | 323 | scm_gen_write (scm_regular_string, "#<struct ", sizeof ("#<struct ") - 1, port); |
0f2d19dd JB |
324 | scm_intprint(exp, 16, port); |
325 | scm_gen_putc ('>', port); | |
326 | break; | |
327 | } | |
328 | ||
329 | case scm_tcs_cons_imcar: | |
330 | case scm_tcs_cons_nimcar: | |
c62fbfe1 MD |
331 | ENTER_NESTED_DATA (pstate, exp, circref); |
332 | scm_iprlist ("(", exp, ')', port, pstate); | |
333 | EXIT_NESTED_DATA (pstate); | |
a51ea417 MD |
334 | break; |
335 | circref: | |
c62fbfe1 | 336 | print_circref (port, pstate, exp); |
0f2d19dd JB |
337 | break; |
338 | case scm_tcs_closures: | |
a51ea417 MD |
339 | if (SCM_NFALSEP (scm_procedure_p (SCM_PRINT_CLOSURE))) |
340 | { | |
341 | SCM ans = scm_cons2 (exp, port, | |
c62fbfe1 MD |
342 | scm_cons (SCM_WRITINGP (pstate) |
343 | ? SCM_BOOL_T | |
344 | : SCM_BOOL_F, | |
345 | SCM_EOL)); | |
a51ea417 | 346 | ans = scm_apply (SCM_PRINT_CLOSURE, ans, SCM_EOL); |
a51ea417 | 347 | } |
84f6a34a | 348 | else |
0f2d19dd | 349 | { |
84f6a34a | 350 | SCM name, code; |
0f2d19dd | 351 | name = scm_procedure_property (exp, scm_i_name); |
84f6a34a MD |
352 | code = SCM_CODE (exp); |
353 | scm_gen_puts (scm_regular_string, "#<procedure ", port); | |
354 | if (SCM_NIMP (name) && SCM_ROSTRINGP (name)) | |
0f2d19dd | 355 | { |
84f6a34a | 356 | scm_gen_puts (scm_regular_string, SCM_ROCHARS (name), port); |
0f2d19dd | 357 | scm_gen_putc (' ', port); |
0f2d19dd | 358 | } |
c62fbfe1 | 359 | scm_iprin1 (SCM_CAR (code), port, pstate); |
84f6a34a MD |
360 | if (SCM_PRINT_SOURCE_P) |
361 | { | |
362 | code = scm_unmemocopy (SCM_CDR (code), | |
363 | SCM_EXTEND_ENV (SCM_CAR (code), | |
364 | SCM_EOL, | |
365 | SCM_ENV (exp))); | |
c62fbfe1 MD |
366 | ENTER_NESTED_DATA (pstate, exp, circref); |
367 | scm_iprlist (" ", code, '>', port, pstate); | |
368 | EXIT_NESTED_DATA (pstate); | |
84f6a34a MD |
369 | } |
370 | else | |
371 | scm_gen_putc ('>', port); | |
0f2d19dd JB |
372 | } |
373 | break; | |
374 | case scm_tc7_mb_string: | |
375 | case scm_tc7_mb_substring: | |
c62fbfe1 | 376 | scm_print_mb_string (exp, port, SCM_WRITINGP (pstate)); |
0f2d19dd JB |
377 | break; |
378 | case scm_tc7_substring: | |
379 | case scm_tc7_string: | |
c62fbfe1 | 380 | if (SCM_WRITINGP (pstate)) |
0f2d19dd | 381 | { |
dbef8851 | 382 | scm_gen_putc ('"', port); |
0f2d19dd JB |
383 | for (i = 0; i < SCM_ROLENGTH (exp); ++i) |
384 | switch (SCM_ROCHARS (exp)[i]) | |
385 | { | |
dbef8851 | 386 | case '"': |
0f2d19dd JB |
387 | case '\\': |
388 | scm_gen_putc ('\\', port); | |
389 | default: | |
390 | scm_gen_putc (SCM_ROCHARS (exp)[i], port); | |
391 | } | |
dbef8851 | 392 | scm_gen_putc ('"', port); |
0f2d19dd JB |
393 | break; |
394 | } | |
395 | else | |
396 | scm_gen_write (scm_regular_string, SCM_ROCHARS (exp), | |
397 | (scm_sizet) SCM_ROLENGTH (exp), | |
398 | port); | |
399 | break; | |
400 | case scm_tcs_symbols: | |
401 | if (SCM_MB_STRINGP (exp)) | |
402 | { | |
403 | scm_print_mb_symbol (exp, port); | |
404 | break; | |
405 | } | |
406 | else | |
407 | { | |
408 | int pos; | |
409 | int end; | |
410 | int len; | |
411 | char * str; | |
412 | int weird; | |
413 | int maybe_weird; | |
4dc2435a | 414 | int mw_pos = 0; |
0f2d19dd JB |
415 | |
416 | len = SCM_LENGTH (exp); | |
417 | str = SCM_CHARS (exp); | |
418 | scm_remember (&exp); | |
419 | pos = 0; | |
420 | weird = 0; | |
421 | maybe_weird = 0; | |
422 | ||
423 | if (len == 0) | |
424 | scm_gen_write (scm_regular_string, "#{}#", 4, port); | |
425 | ||
426 | for (end = pos; end < len; ++end) | |
427 | switch (str[end]) | |
428 | { | |
429 | #ifdef BRACKETS_AS_PARENS | |
430 | case '[': | |
431 | case ']': | |
432 | #endif | |
433 | case '(': | |
434 | case ')': | |
dbef8851 | 435 | case '"': |
0f2d19dd JB |
436 | case ';': |
437 | case SCM_WHITE_SPACES: | |
438 | case SCM_LINE_INCREMENTORS: | |
439 | weird_handler: | |
440 | if (maybe_weird) | |
441 | { | |
442 | end = mw_pos; | |
443 | maybe_weird = 0; | |
444 | } | |
445 | if (!weird) | |
446 | { | |
447 | scm_gen_write (scm_regular_string, "#{", 2, port); | |
448 | weird = 1; | |
449 | } | |
450 | if (pos < end) | |
451 | { | |
452 | scm_gen_write (scm_regular_string, str + pos, end - pos, port); | |
453 | } | |
454 | { | |
455 | char buf[2]; | |
456 | buf[0] = '\\'; | |
457 | buf[1] = str[end]; | |
458 | scm_gen_write (scm_regular_string, buf, 2, port); | |
459 | } | |
460 | pos = end + 1; | |
461 | break; | |
462 | case '\\': | |
463 | if (weird) | |
464 | goto weird_handler; | |
465 | if (!maybe_weird) | |
466 | { | |
467 | maybe_weird = 1; | |
468 | mw_pos = pos; | |
469 | } | |
470 | break; | |
471 | case '}': | |
472 | case '#': | |
473 | if (weird) | |
474 | goto weird_handler; | |
475 | break; | |
476 | default: | |
477 | break; | |
478 | } | |
479 | if (pos < end) | |
480 | scm_gen_write (scm_regular_string, str + pos, end - pos, port); | |
481 | if (weird) | |
482 | scm_gen_write (scm_regular_string, "}#", 2, port); | |
483 | break; | |
484 | } | |
485 | case scm_tc7_wvect: | |
c62fbfe1 | 486 | ENTER_NESTED_DATA (pstate, exp, circref); |
0f2d19dd JB |
487 | if (SCM_IS_WHVEC (exp)) |
488 | scm_gen_puts (scm_regular_string, "#wh(", port); | |
489 | else | |
490 | scm_gen_puts (scm_regular_string, "#w(", port); | |
491 | goto common_vector_printer; | |
492 | ||
493 | case scm_tc7_vector: | |
c62fbfe1 | 494 | ENTER_NESTED_DATA (pstate, exp, circref); |
0f2d19dd JB |
495 | scm_gen_puts (scm_regular_string, "#(", port); |
496 | common_vector_printer: | |
497 | for (i = 0; i + 1 < SCM_LENGTH (exp); ++i) | |
498 | { | |
499 | /* CHECK_INTS; */ | |
c62fbfe1 | 500 | scm_iprin1 (SCM_VELTS (exp)[i], port, pstate); |
0f2d19dd JB |
501 | scm_gen_putc (' ', port); |
502 | } | |
503 | if (i < SCM_LENGTH (exp)) | |
504 | { | |
505 | /* CHECK_INTS; */ | |
c62fbfe1 | 506 | scm_iprin1 (SCM_VELTS (exp)[i], port, pstate); |
0f2d19dd JB |
507 | } |
508 | scm_gen_putc (')', port); | |
c62fbfe1 | 509 | EXIT_NESTED_DATA (pstate); |
0f2d19dd JB |
510 | break; |
511 | case scm_tc7_bvect: | |
512 | case scm_tc7_byvect: | |
513 | case scm_tc7_svect: | |
514 | case scm_tc7_ivect: | |
515 | case scm_tc7_uvect: | |
516 | case scm_tc7_fvect: | |
517 | case scm_tc7_dvect: | |
518 | case scm_tc7_cvect: | |
519 | #ifdef LONGLONGS | |
520 | case scm_tc7_llvect: | |
521 | #endif | |
c62fbfe1 | 522 | scm_raprin1 (exp, port, pstate); |
0f2d19dd JB |
523 | break; |
524 | case scm_tcs_subrs: | |
525 | scm_gen_puts (scm_regular_string, "#<primitive-procedure ", port); | |
526 | scm_gen_puts ((SCM_MB_STRINGP (SCM_SNAME(exp)) | |
527 | ? scm_mb_string | |
528 | : scm_regular_string), | |
529 | SCM_CHARS (SCM_SNAME (exp)), port); | |
530 | scm_gen_putc ('>', port); | |
531 | break; | |
532 | #ifdef CCLO | |
533 | case scm_tc7_cclo: | |
534 | scm_gen_puts (scm_regular_string, "#<compiled-closure ", port); | |
c62fbfe1 | 535 | scm_iprin1 (SCM_CCLO_SUBR (exp), port, pstate); |
0f2d19dd JB |
536 | scm_gen_putc ('>', port); |
537 | break; | |
538 | #endif | |
539 | case scm_tc7_contin: | |
540 | scm_gen_puts (scm_regular_string, "#<continuation ", port); | |
541 | scm_intprint (SCM_LENGTH (exp), 10, port); | |
542 | scm_gen_puts (scm_regular_string, " @ ", port); | |
543 | scm_intprint ((long) SCM_CHARS (exp), 16, port); | |
544 | scm_gen_putc ('>', port); | |
545 | break; | |
546 | case scm_tc7_port: | |
547 | i = SCM_PTOBNUM (exp); | |
c62fbfe1 MD |
548 | if (i < scm_numptob |
549 | && scm_ptobs[i].print | |
550 | && (scm_ptobs[i].print) (exp, port, pstate)) | |
0f2d19dd JB |
551 | break; |
552 | goto punk; | |
553 | case scm_tc7_smob: | |
c62fbfe1 | 554 | ENTER_NESTED_DATA (pstate, exp, circref); |
0f2d19dd JB |
555 | i = SCM_SMOBNUM (exp); |
556 | if (i < scm_numsmob && scm_smobs[i].print | |
c62fbfe1 | 557 | && (scm_smobs[i].print) (exp, port, pstate)) |
a51ea417 | 558 | { |
c62fbfe1 | 559 | EXIT_NESTED_DATA (pstate); |
a51ea417 MD |
560 | break; |
561 | } | |
c62fbfe1 | 562 | EXIT_NESTED_DATA (pstate); |
0f2d19dd | 563 | default: |
a51ea417 MD |
564 | punk: |
565 | scm_ipruk ("type", exp, port); | |
0f2d19dd JB |
566 | } |
567 | } | |
568 | } | |
569 | ||
c62fbfe1 MD |
570 | /* Print states are necessary for circular reference safe printing. |
571 | * They are also expensive to allocate. Therefore print states are | |
572 | * kept in a pool so that they can be reused. | |
573 | */ | |
1cc91f1b | 574 | |
a51ea417 | 575 | void |
c62fbfe1 | 576 | scm_prin1 (exp, port, writingp) |
a51ea417 MD |
577 | SCM exp; |
578 | SCM port; | |
c62fbfe1 | 579 | int writingp; |
a51ea417 | 580 | { |
c62fbfe1 MD |
581 | SCM handle = 0; /* Will GC protect the handle whilst unlinked */ |
582 | scm_print_state *pstate; | |
583 | ||
584 | /* First try to allocate a print state from the pool */ | |
585 | SCM_DEFER_INTS; | |
586 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) | |
587 | { | |
588 | handle = SCM_CDR (print_state_pool); | |
589 | SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool)); | |
590 | } | |
591 | SCM_ALLOW_INTS; | |
592 | ||
593 | if (!handle) | |
698c0295 | 594 | handle = scm_cons (make_print_state (), SCM_EOL); |
c62fbfe1 | 595 | |
698c0295 | 596 | pstate = SCM_PRINT_STATE (SCM_CAR (handle)); |
c62fbfe1 MD |
597 | pstate->writingp = writingp; |
598 | scm_iprin1 (exp, port, pstate); | |
599 | ||
600 | /* Return print state to pool */ | |
601 | SCM_DEFER_INTS; | |
602 | SCM_SETCDR (handle, SCM_CDR (print_state_pool)); | |
603 | SCM_SETCDR (print_state_pool, handle); | |
604 | SCM_ALLOW_INTS; | |
a51ea417 MD |
605 | } |
606 | ||
0f2d19dd JB |
607 | |
608 | /* Print an integer. | |
609 | */ | |
1cc91f1b | 610 | |
0f2d19dd JB |
611 | void |
612 | scm_intprint (n, radix, port) | |
613 | long n; | |
614 | int radix; | |
615 | SCM port; | |
0f2d19dd JB |
616 | { |
617 | char num_buf[SCM_INTBUFLEN]; | |
618 | scm_gen_write (scm_regular_string, num_buf, scm_iint2str (n, radix, num_buf), port); | |
619 | } | |
620 | ||
621 | /* Print an object of unrecognized type. | |
622 | */ | |
1cc91f1b | 623 | |
0f2d19dd JB |
624 | void |
625 | scm_ipruk (hdr, ptr, port) | |
626 | char *hdr; | |
627 | SCM ptr; | |
628 | SCM port; | |
0f2d19dd JB |
629 | { |
630 | scm_gen_puts (scm_regular_string, "#<unknown-", port); | |
631 | scm_gen_puts (scm_regular_string, hdr, port); | |
632 | if (SCM_CELLP (ptr)) | |
633 | { | |
634 | scm_gen_puts (scm_regular_string, " (0x", port); | |
635 | scm_intprint (SCM_CAR (ptr), 16, port); | |
636 | scm_gen_puts (scm_regular_string, " . 0x", port); | |
637 | scm_intprint (SCM_CDR (ptr), 16, port); | |
638 | scm_gen_puts (scm_regular_string, ") @", port); | |
639 | } | |
640 | scm_gen_puts (scm_regular_string, " 0x", port); | |
641 | scm_intprint (ptr, 16, port); | |
642 | scm_gen_putc ('>', port); | |
643 | } | |
644 | ||
645 | /* Print a list. | |
646 | */ | |
a51ea417 | 647 | |
1cc91f1b | 648 | |
0f2d19dd | 649 | void |
c62fbfe1 | 650 | scm_iprlist (hdr, exp, tlr, port, pstate) |
0f2d19dd JB |
651 | char *hdr; |
652 | SCM exp; | |
653 | char tlr; | |
654 | SCM port; | |
c62fbfe1 | 655 | scm_print_state *pstate; |
0f2d19dd | 656 | { |
c62fbfe1 MD |
657 | register int i; |
658 | register SCM hare, tortoise; | |
659 | int floor = pstate->top - 2; | |
0f2d19dd JB |
660 | scm_gen_puts (scm_regular_string, hdr, port); |
661 | /* CHECK_INTS; */ | |
c62fbfe1 MD |
662 | if (pstate->fancyp) |
663 | goto fancy_printing; | |
664 | ||
665 | /* Run a hare and tortoise so that total time complexity will be | |
666 | O(depth * N) instead of O(N^2). */ | |
667 | hare = SCM_CDR (exp); | |
668 | tortoise = exp; | |
2fab3faa | 669 | while (SCM_NIMP (hare) && SCM_ECONSP (hare)) |
c62fbfe1 MD |
670 | { |
671 | if (hare == tortoise) | |
672 | goto fancy_printing; | |
673 | hare = SCM_CDR (hare); | |
2fab3faa | 674 | if (SCM_IMP (hare) || SCM_NECONSP (hare)) |
c62fbfe1 MD |
675 | break; |
676 | hare = SCM_CDR (hare); | |
677 | tortoise = SCM_CDR (tortoise); | |
678 | } | |
679 | ||
680 | /* No cdr cycles intrinsic to this list */ | |
681 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
0f2d19dd JB |
682 | exp = SCM_CDR (exp); |
683 | for (; SCM_NIMP (exp); exp = SCM_CDR (exp)) | |
684 | { | |
685 | if (SCM_NECONSP (exp)) | |
686 | break; | |
c62fbfe1 MD |
687 | for (i = floor; i >= 0; --i) |
688 | if (pstate->ref_stack[i] == exp) | |
689 | goto circref; | |
690 | PUSH_REF (pstate, exp); | |
0f2d19dd JB |
691 | scm_gen_putc (' ', port); |
692 | /* CHECK_INTS; */ | |
c62fbfe1 | 693 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
0f2d19dd JB |
694 | } |
695 | if (SCM_NNULLP (exp)) | |
696 | { | |
697 | scm_gen_puts (scm_regular_string, " . ", port); | |
c62fbfe1 | 698 | scm_iprin1 (exp, port, pstate); |
0f2d19dd | 699 | } |
c62fbfe1 | 700 | |
a51ea417 | 701 | end: |
0f2d19dd | 702 | scm_gen_putc (tlr, port); |
c62fbfe1 | 703 | pstate->top = floor + 2; |
a51ea417 | 704 | return; |
c62fbfe1 MD |
705 | |
706 | fancy_printing: | |
707 | { | |
708 | int n = pstate->length; | |
709 | ||
710 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
711 | exp = SCM_CDR (exp); --n; | |
712 | for (; SCM_NIMP (exp); exp = SCM_CDR (exp)) | |
713 | { | |
714 | if (SCM_NECONSP (exp)) | |
715 | break; | |
716 | for (i = 0; i < pstate->top; ++i) | |
717 | if (pstate->ref_stack[i] == exp) | |
718 | goto fancy_circref; | |
719 | if (pstate->fancyp) | |
720 | { | |
721 | if (n == 0) | |
722 | { | |
723 | scm_gen_puts (scm_regular_string, " ...", port); | |
724 | goto skip_tail; | |
725 | } | |
726 | else | |
727 | --n; | |
728 | } | |
729 | PUSH_REF(pstate, exp); | |
730 | ++pstate->list_offset; | |
731 | scm_gen_putc (' ', port); | |
732 | /* CHECK_INTS; */ | |
733 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
734 | } | |
735 | } | |
736 | if (SCM_NNULLP (exp)) | |
737 | { | |
738 | scm_gen_puts (scm_regular_string, " . ", port); | |
739 | scm_iprin1 (exp, port, pstate); | |
740 | } | |
741 | skip_tail: | |
742 | pstate->list_offset -= pstate->top - floor - 2; | |
a51ea417 | 743 | goto end; |
a51ea417 | 744 | |
c62fbfe1 MD |
745 | fancy_circref: |
746 | pstate->list_offset -= pstate->top - floor - 2; | |
747 | ||
748 | circref: | |
749 | scm_gen_puts (scm_regular_string, " . ", port); | |
750 | print_circref (port, pstate, exp); | |
751 | goto end; | |
0f2d19dd JB |
752 | } |
753 | ||
754 | \f | |
755 | ||
756 | SCM_PROC(s_write, "write", 1, 1, 0, scm_write); | |
1cc91f1b | 757 | |
0f2d19dd JB |
758 | SCM |
759 | scm_write (obj, port) | |
760 | SCM obj; | |
761 | SCM port; | |
0f2d19dd JB |
762 | { |
763 | if (SCM_UNBNDP (port)) | |
764 | port = scm_cur_outp; | |
765 | else | |
766 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG2, s_write); | |
a51ea417 | 767 | scm_prin1 (obj, port, 1); |
0f2d19dd JB |
768 | #ifdef HAVE_PIPE |
769 | # ifdef EPIPE | |
770 | if (EPIPE == errno) | |
771 | scm_close_port (port); | |
772 | # endif | |
773 | #endif | |
774 | return SCM_UNSPECIFIED; | |
775 | } | |
776 | ||
777 | ||
778 | SCM_PROC(s_display, "display", 1, 1, 0, scm_display); | |
1cc91f1b | 779 | |
0f2d19dd JB |
780 | SCM |
781 | scm_display (obj, port) | |
782 | SCM obj; | |
783 | SCM port; | |
0f2d19dd JB |
784 | { |
785 | if (SCM_UNBNDP (port)) | |
786 | port = scm_cur_outp; | |
787 | else | |
788 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG2, s_display); | |
a51ea417 | 789 | scm_prin1 (obj, port, 0); |
0f2d19dd JB |
790 | #ifdef HAVE_PIPE |
791 | # ifdef EPIPE | |
792 | if (EPIPE == errno) | |
793 | scm_close_port (port); | |
794 | # endif | |
795 | #endif | |
796 | return SCM_UNSPECIFIED; | |
797 | } | |
798 | ||
799 | SCM_PROC(s_newline, "newline", 0, 1, 0, scm_newline); | |
1cc91f1b | 800 | |
0f2d19dd JB |
801 | SCM |
802 | scm_newline (port) | |
803 | SCM port; | |
0f2d19dd JB |
804 | { |
805 | if (SCM_UNBNDP (port)) | |
806 | port = scm_cur_outp; | |
807 | else | |
808 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG1, s_newline); | |
809 | scm_gen_putc ('\n', port); | |
810 | #ifdef HAVE_PIPE | |
811 | # ifdef EPIPE | |
812 | if (EPIPE == errno) | |
813 | scm_close_port (port); | |
814 | else | |
815 | # endif | |
816 | #endif | |
817 | if (port == scm_cur_outp) | |
818 | scm_fflush (port); | |
819 | return SCM_UNSPECIFIED; | |
820 | } | |
821 | ||
822 | SCM_PROC(s_write_char, "write-char", 1, 1, 0, scm_write_char); | |
1cc91f1b | 823 | |
0f2d19dd JB |
824 | SCM |
825 | scm_write_char (chr, port) | |
826 | SCM chr; | |
827 | SCM port; | |
0f2d19dd JB |
828 | { |
829 | if (SCM_UNBNDP (port)) | |
830 | port = scm_cur_outp; | |
831 | else | |
832 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG2, s_write_char); | |
833 | SCM_ASSERT (SCM_ICHRP (chr), chr, SCM_ARG1, s_write_char); | |
834 | scm_gen_putc ((int) SCM_ICHR (chr), port); | |
835 | #ifdef HAVE_PIPE | |
836 | # ifdef EPIPE | |
837 | if (EPIPE == errno) | |
838 | scm_close_port (port); | |
839 | # endif | |
840 | #endif | |
841 | return SCM_UNSPECIFIED; | |
842 | } | |
843 | ||
844 | ||
845 | \f | |
846 | ||
1cc91f1b | 847 | |
0f2d19dd JB |
848 | void |
849 | scm_init_print () | |
0f2d19dd | 850 | { |
c62fbfe1 | 851 | SCM vtable, type; |
b7ff98dd | 852 | scm_init_opts (scm_print_options, scm_print_opts, SCM_N_PRINT_OPTIONS); |
2dfc85c0 | 853 | vtable = scm_make_vtable_vtable (scm_make_struct_layout (scm_nullstr), SCM_INUM0, SCM_EOL); |
c62fbfe1 MD |
854 | type = scm_make_struct (vtable, |
855 | SCM_INUM0, | |
856 | scm_cons (scm_make_struct_layout (scm_makfrom0str (SCM_PRINT_STATE_LAYOUT)), | |
857 | SCM_EOL)); | |
858 | print_state_pool = scm_permanent_object (scm_cons (type, SCM_EOL)); | |
0f2d19dd JB |
859 | #include "print.x" |
860 | } |