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