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 */ | |
178 | SCM_MAKINUM (PSTATE_SIZE), | |
179 | SCM_EOL); | |
180 | SCM_PRINT_STATE (print_state)->ceiling = PSTATE_SIZE; | |
181 | return print_state; | |
182 | } | |
1cc91f1b | 183 | |
c62fbfe1 MD |
184 | SCM |
185 | scm_make_print_state () | |
c62fbfe1 | 186 | { |
698c0295 MD |
187 | SCM answer = 0; |
188 | ||
189 | /* First try to allocate a print state from the pool */ | |
190 | SCM_DEFER_INTS; | |
191 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) | |
192 | { | |
193 | answer = SCM_CADR (print_state_pool); | |
194 | SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool)); | |
195 | } | |
196 | SCM_ALLOW_INTS; | |
197 | ||
198 | return answer ? answer : make_print_state (); | |
c62fbfe1 | 199 | } |
a51ea417 | 200 | |
698c0295 MD |
201 | void |
202 | scm_free_print_state (print_state) | |
203 | SCM print_state; | |
204 | { | |
205 | SCM handle; | |
206 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); | |
207 | /* Cleanup before returning print state to pool. | |
208 | * It is better to do it here. Doing it in scm_prin1 | |
209 | * would cost more since that function is called much more | |
210 | * often. | |
211 | */ | |
212 | pstate->fancyp = 0; | |
213 | SCM_NEWCELL (handle); | |
214 | SCM_DEFER_INTS; | |
215 | SCM_SETCAR (handle, print_state); | |
216 | SCM_SETCDR (handle, SCM_CDR (print_state_pool)); | |
217 | SCM_SETCDR (print_state_pool, handle); | |
218 | SCM_ALLOW_INTS; | |
219 | } | |
1cc91f1b JB |
220 | |
221 | static void grow_ref_stack SCM_P ((scm_print_state *pstate)); | |
222 | ||
a51ea417 | 223 | static void |
c62fbfe1 MD |
224 | grow_ref_stack (pstate) |
225 | scm_print_state *pstate; | |
a51ea417 | 226 | { |
c62fbfe1 MD |
227 | int i, size = pstate->ceiling; |
228 | int total_size; | |
229 | SCM handle; | |
230 | SCM *data; | |
231 | SCM_DEFER_INTS; | |
232 | handle = pstate->handle; | |
233 | data = (SCM *) pstate - scm_struct_n_extra_words; | |
234 | total_size = ((SCM *) pstate)[scm_struct_i_n_words]; | |
235 | data = (SCM *) scm_must_realloc ((char *) data, | |
236 | total_size, | |
237 | total_size + size, | |
238 | "grow_ref_stack"); | |
239 | pstate = (scm_print_state *) (data + scm_struct_n_extra_words); | |
240 | ((SCM *) pstate)[scm_struct_i_n_words] = total_size + size; | |
241 | pstate->ceiling += size; | |
242 | for (i = size; i < pstate->ceiling; ++i) | |
243 | pstate->ref_stack[i] = SCM_BOOL_F; | |
244 | SCM_SETCDR (handle, pstate); | |
245 | SCM_ALLOW_INTS; | |
a51ea417 MD |
246 | } |
247 | ||
1cc91f1b JB |
248 | |
249 | static void print_circref SCM_P ((SCM port, scm_print_state *pstate, SCM ref)); | |
250 | ||
a51ea417 | 251 | static void |
c62fbfe1 MD |
252 | print_circref (port, pstate, ref) |
253 | SCM port; | |
254 | scm_print_state *pstate; | |
255 | SCM ref; | |
a51ea417 | 256 | { |
c62fbfe1 MD |
257 | register int i; |
258 | int self = pstate->top - 1; | |
259 | i = pstate->top - 1; | |
260 | if (SCM_CONSP (pstate->ref_stack[i])) | |
261 | { | |
262 | while (i > 0) | |
263 | { | |
264 | if (SCM_NCONSP (pstate->ref_stack[i - 1]) | |
265 | || SCM_CDR (pstate->ref_stack[i - 1]) != pstate->ref_stack[i]) | |
266 | break; | |
267 | --i; | |
268 | } | |
269 | self = i; | |
270 | } | |
271 | for (i = pstate->top - 1; 1; --i) | |
272 | if (pstate->ref_stack[i] == ref) | |
273 | break; | |
274 | scm_gen_putc ('#', port); | |
275 | scm_intprint (i - self, 10, port); | |
276 | scm_gen_putc ('#', port); | |
a51ea417 MD |
277 | } |
278 | ||
c62fbfe1 | 279 | /* Print generally. Handles both write and display according to PSTATE. |
0f2d19dd | 280 | */ |
a51ea417 | 281 | |
1cc91f1b | 282 | |
0f2d19dd | 283 | void |
c62fbfe1 | 284 | scm_iprin1 (exp, port, pstate) |
0f2d19dd JB |
285 | SCM exp; |
286 | SCM port; | |
c62fbfe1 | 287 | scm_print_state *pstate; |
0f2d19dd JB |
288 | { |
289 | register long i; | |
290 | taloop: | |
291 | switch (7 & (int) exp) | |
292 | { | |
293 | case 2: | |
294 | case 6: | |
295 | scm_intprint (SCM_INUM (exp), 10, port); | |
296 | break; | |
297 | case 4: | |
298 | if (SCM_ICHRP (exp)) | |
299 | { | |
300 | i = SCM_ICHR (exp); | |
c62fbfe1 | 301 | scm_put_wchar (i, port, SCM_WRITINGP (pstate)); |
0f2d19dd JB |
302 | |
303 | } | |
a51ea417 | 304 | else if (SCM_IFLAGP (exp) |
0f2d19dd | 305 | && (SCM_ISYMNUM (exp) < (sizeof scm_isymnames / sizeof (char *)))) |
08b5b88c | 306 | scm_gen_puts (scm_regular_string, SCM_ISYMCHARS (exp), port); |
0f2d19dd JB |
307 | else if (SCM_ILOCP (exp)) |
308 | { | |
309 | scm_gen_puts (scm_regular_string, "#@", port); | |
310 | scm_intprint ((long) SCM_IFRAME (exp), 10, port); | |
311 | scm_gen_putc (SCM_ICDRP (exp) ? '-' : '+', port); | |
312 | scm_intprint ((long) SCM_IDIST (exp), 10, port); | |
313 | } | |
314 | else | |
315 | goto idef; | |
316 | break; | |
317 | case 1: | |
318 | /* gloc */ | |
319 | scm_gen_puts (scm_regular_string, "#@", port); | |
320 | exp = SCM_CAR (exp - 1); | |
321 | goto taloop; | |
322 | default: | |
323 | idef: | |
324 | scm_ipruk ("immediate", exp, port); | |
325 | break; | |
326 | case 0: | |
327 | switch (SCM_TYP7 (exp)) | |
328 | { | |
329 | case scm_tcs_cons_gloc: | |
330 | ||
331 | if (SCM_CDR (SCM_CAR (exp) - 1L) == 0) | |
332 | { | |
a51ea417 | 333 | scm_gen_write (scm_regular_string, "#<struct ", sizeof ("#<struct ") - 1, port); |
0f2d19dd JB |
334 | scm_intprint(exp, 16, port); |
335 | scm_gen_putc ('>', port); | |
336 | break; | |
337 | } | |
338 | ||
339 | case scm_tcs_cons_imcar: | |
340 | case scm_tcs_cons_nimcar: | |
c62fbfe1 MD |
341 | ENTER_NESTED_DATA (pstate, exp, circref); |
342 | scm_iprlist ("(", exp, ')', port, pstate); | |
343 | EXIT_NESTED_DATA (pstate); | |
a51ea417 MD |
344 | break; |
345 | circref: | |
c62fbfe1 | 346 | print_circref (port, pstate, exp); |
0f2d19dd JB |
347 | break; |
348 | case scm_tcs_closures: | |
a51ea417 MD |
349 | if (SCM_NFALSEP (scm_procedure_p (SCM_PRINT_CLOSURE))) |
350 | { | |
351 | SCM ans = scm_cons2 (exp, port, | |
c62fbfe1 MD |
352 | scm_cons (SCM_WRITINGP (pstate) |
353 | ? SCM_BOOL_T | |
354 | : SCM_BOOL_F, | |
355 | SCM_EOL)); | |
a51ea417 | 356 | ans = scm_apply (SCM_PRINT_CLOSURE, ans, SCM_EOL); |
a51ea417 | 357 | } |
84f6a34a | 358 | else |
0f2d19dd | 359 | { |
84f6a34a | 360 | SCM name, code; |
0f2d19dd | 361 | name = scm_procedure_property (exp, scm_i_name); |
84f6a34a MD |
362 | code = SCM_CODE (exp); |
363 | scm_gen_puts (scm_regular_string, "#<procedure ", port); | |
364 | if (SCM_NIMP (name) && SCM_ROSTRINGP (name)) | |
0f2d19dd | 365 | { |
84f6a34a | 366 | scm_gen_puts (scm_regular_string, SCM_ROCHARS (name), port); |
0f2d19dd | 367 | scm_gen_putc (' ', port); |
0f2d19dd | 368 | } |
c62fbfe1 | 369 | scm_iprin1 (SCM_CAR (code), port, pstate); |
84f6a34a MD |
370 | if (SCM_PRINT_SOURCE_P) |
371 | { | |
372 | code = scm_unmemocopy (SCM_CDR (code), | |
373 | SCM_EXTEND_ENV (SCM_CAR (code), | |
374 | SCM_EOL, | |
375 | SCM_ENV (exp))); | |
c62fbfe1 MD |
376 | ENTER_NESTED_DATA (pstate, exp, circref); |
377 | scm_iprlist (" ", code, '>', port, pstate); | |
378 | EXIT_NESTED_DATA (pstate); | |
84f6a34a MD |
379 | } |
380 | else | |
381 | scm_gen_putc ('>', port); | |
0f2d19dd JB |
382 | } |
383 | break; | |
384 | case scm_tc7_mb_string: | |
385 | case scm_tc7_mb_substring: | |
c62fbfe1 | 386 | scm_print_mb_string (exp, port, SCM_WRITINGP (pstate)); |
0f2d19dd JB |
387 | break; |
388 | case scm_tc7_substring: | |
389 | case scm_tc7_string: | |
c62fbfe1 | 390 | if (SCM_WRITINGP (pstate)) |
0f2d19dd | 391 | { |
dbef8851 | 392 | scm_gen_putc ('"', port); |
0f2d19dd JB |
393 | for (i = 0; i < SCM_ROLENGTH (exp); ++i) |
394 | switch (SCM_ROCHARS (exp)[i]) | |
395 | { | |
dbef8851 | 396 | case '"': |
0f2d19dd JB |
397 | case '\\': |
398 | scm_gen_putc ('\\', port); | |
399 | default: | |
400 | scm_gen_putc (SCM_ROCHARS (exp)[i], port); | |
401 | } | |
dbef8851 | 402 | scm_gen_putc ('"', port); |
0f2d19dd JB |
403 | break; |
404 | } | |
405 | else | |
406 | scm_gen_write (scm_regular_string, SCM_ROCHARS (exp), | |
407 | (scm_sizet) SCM_ROLENGTH (exp), | |
408 | port); | |
409 | break; | |
410 | case scm_tcs_symbols: | |
411 | if (SCM_MB_STRINGP (exp)) | |
412 | { | |
413 | scm_print_mb_symbol (exp, port); | |
414 | break; | |
415 | } | |
416 | else | |
417 | { | |
418 | int pos; | |
419 | int end; | |
420 | int len; | |
421 | char * str; | |
422 | int weird; | |
423 | int maybe_weird; | |
424 | int mw_pos; | |
425 | ||
426 | len = SCM_LENGTH (exp); | |
427 | str = SCM_CHARS (exp); | |
428 | scm_remember (&exp); | |
429 | pos = 0; | |
430 | weird = 0; | |
431 | maybe_weird = 0; | |
432 | ||
433 | if (len == 0) | |
434 | scm_gen_write (scm_regular_string, "#{}#", 4, port); | |
435 | ||
436 | for (end = pos; end < len; ++end) | |
437 | switch (str[end]) | |
438 | { | |
439 | #ifdef BRACKETS_AS_PARENS | |
440 | case '[': | |
441 | case ']': | |
442 | #endif | |
443 | case '(': | |
444 | case ')': | |
dbef8851 | 445 | case '"': |
0f2d19dd JB |
446 | case ';': |
447 | case SCM_WHITE_SPACES: | |
448 | case SCM_LINE_INCREMENTORS: | |
449 | weird_handler: | |
450 | if (maybe_weird) | |
451 | { | |
452 | end = mw_pos; | |
453 | maybe_weird = 0; | |
454 | } | |
455 | if (!weird) | |
456 | { | |
457 | scm_gen_write (scm_regular_string, "#{", 2, port); | |
458 | weird = 1; | |
459 | } | |
460 | if (pos < end) | |
461 | { | |
462 | scm_gen_write (scm_regular_string, str + pos, end - pos, port); | |
463 | } | |
464 | { | |
465 | char buf[2]; | |
466 | buf[0] = '\\'; | |
467 | buf[1] = str[end]; | |
468 | scm_gen_write (scm_regular_string, buf, 2, port); | |
469 | } | |
470 | pos = end + 1; | |
471 | break; | |
472 | case '\\': | |
473 | if (weird) | |
474 | goto weird_handler; | |
475 | if (!maybe_weird) | |
476 | { | |
477 | maybe_weird = 1; | |
478 | mw_pos = pos; | |
479 | } | |
480 | break; | |
481 | case '}': | |
482 | case '#': | |
483 | if (weird) | |
484 | goto weird_handler; | |
485 | break; | |
486 | default: | |
487 | break; | |
488 | } | |
489 | if (pos < end) | |
490 | scm_gen_write (scm_regular_string, str + pos, end - pos, port); | |
491 | if (weird) | |
492 | scm_gen_write (scm_regular_string, "}#", 2, port); | |
493 | break; | |
494 | } | |
495 | case scm_tc7_wvect: | |
c62fbfe1 | 496 | ENTER_NESTED_DATA (pstate, exp, circref); |
0f2d19dd JB |
497 | if (SCM_IS_WHVEC (exp)) |
498 | scm_gen_puts (scm_regular_string, "#wh(", port); | |
499 | else | |
500 | scm_gen_puts (scm_regular_string, "#w(", port); | |
501 | goto common_vector_printer; | |
502 | ||
503 | case scm_tc7_vector: | |
c62fbfe1 | 504 | ENTER_NESTED_DATA (pstate, exp, circref); |
0f2d19dd JB |
505 | scm_gen_puts (scm_regular_string, "#(", port); |
506 | common_vector_printer: | |
507 | for (i = 0; i + 1 < SCM_LENGTH (exp); ++i) | |
508 | { | |
509 | /* CHECK_INTS; */ | |
c62fbfe1 | 510 | scm_iprin1 (SCM_VELTS (exp)[i], port, pstate); |
0f2d19dd JB |
511 | scm_gen_putc (' ', port); |
512 | } | |
513 | if (i < SCM_LENGTH (exp)) | |
514 | { | |
515 | /* CHECK_INTS; */ | |
c62fbfe1 | 516 | scm_iprin1 (SCM_VELTS (exp)[i], port, pstate); |
0f2d19dd JB |
517 | } |
518 | scm_gen_putc (')', port); | |
c62fbfe1 | 519 | EXIT_NESTED_DATA (pstate); |
0f2d19dd JB |
520 | break; |
521 | case scm_tc7_bvect: | |
522 | case scm_tc7_byvect: | |
523 | case scm_tc7_svect: | |
524 | case scm_tc7_ivect: | |
525 | case scm_tc7_uvect: | |
526 | case scm_tc7_fvect: | |
527 | case scm_tc7_dvect: | |
528 | case scm_tc7_cvect: | |
529 | #ifdef LONGLONGS | |
530 | case scm_tc7_llvect: | |
531 | #endif | |
c62fbfe1 | 532 | scm_raprin1 (exp, port, pstate); |
0f2d19dd JB |
533 | break; |
534 | case scm_tcs_subrs: | |
535 | scm_gen_puts (scm_regular_string, "#<primitive-procedure ", port); | |
536 | scm_gen_puts ((SCM_MB_STRINGP (SCM_SNAME(exp)) | |
537 | ? scm_mb_string | |
538 | : scm_regular_string), | |
539 | SCM_CHARS (SCM_SNAME (exp)), port); | |
540 | scm_gen_putc ('>', port); | |
541 | break; | |
542 | #ifdef CCLO | |
543 | case scm_tc7_cclo: | |
544 | scm_gen_puts (scm_regular_string, "#<compiled-closure ", port); | |
c62fbfe1 | 545 | scm_iprin1 (SCM_CCLO_SUBR (exp), port, pstate); |
0f2d19dd JB |
546 | scm_gen_putc ('>', port); |
547 | break; | |
548 | #endif | |
549 | case scm_tc7_contin: | |
550 | scm_gen_puts (scm_regular_string, "#<continuation ", port); | |
551 | scm_intprint (SCM_LENGTH (exp), 10, port); | |
552 | scm_gen_puts (scm_regular_string, " @ ", port); | |
553 | scm_intprint ((long) SCM_CHARS (exp), 16, port); | |
554 | scm_gen_putc ('>', port); | |
555 | break; | |
556 | case scm_tc7_port: | |
557 | i = SCM_PTOBNUM (exp); | |
c62fbfe1 MD |
558 | if (i < scm_numptob |
559 | && scm_ptobs[i].print | |
560 | && (scm_ptobs[i].print) (exp, port, pstate)) | |
0f2d19dd JB |
561 | break; |
562 | goto punk; | |
563 | case scm_tc7_smob: | |
c62fbfe1 | 564 | ENTER_NESTED_DATA (pstate, exp, circref); |
0f2d19dd JB |
565 | i = SCM_SMOBNUM (exp); |
566 | if (i < scm_numsmob && scm_smobs[i].print | |
c62fbfe1 | 567 | && (scm_smobs[i].print) (exp, port, pstate)) |
a51ea417 | 568 | { |
c62fbfe1 | 569 | EXIT_NESTED_DATA (pstate); |
a51ea417 MD |
570 | break; |
571 | } | |
c62fbfe1 | 572 | EXIT_NESTED_DATA (pstate); |
0f2d19dd | 573 | default: |
a51ea417 MD |
574 | punk: |
575 | scm_ipruk ("type", exp, port); | |
0f2d19dd JB |
576 | } |
577 | } | |
578 | } | |
579 | ||
c62fbfe1 MD |
580 | /* Print states are necessary for circular reference safe printing. |
581 | * They are also expensive to allocate. Therefore print states are | |
582 | * kept in a pool so that they can be reused. | |
583 | */ | |
1cc91f1b | 584 | |
a51ea417 | 585 | void |
c62fbfe1 | 586 | scm_prin1 (exp, port, writingp) |
a51ea417 MD |
587 | SCM exp; |
588 | SCM port; | |
c62fbfe1 | 589 | int writingp; |
a51ea417 | 590 | { |
c62fbfe1 MD |
591 | SCM handle = 0; /* Will GC protect the handle whilst unlinked */ |
592 | scm_print_state *pstate; | |
593 | ||
594 | /* First try to allocate a print state from the pool */ | |
595 | SCM_DEFER_INTS; | |
596 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) | |
597 | { | |
598 | handle = SCM_CDR (print_state_pool); | |
599 | SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool)); | |
600 | } | |
601 | SCM_ALLOW_INTS; | |
602 | ||
603 | if (!handle) | |
698c0295 | 604 | handle = scm_cons (make_print_state (), SCM_EOL); |
c62fbfe1 | 605 | |
698c0295 | 606 | pstate = SCM_PRINT_STATE (SCM_CAR (handle)); |
c62fbfe1 MD |
607 | pstate->writingp = writingp; |
608 | scm_iprin1 (exp, port, pstate); | |
609 | ||
610 | /* Return print state to pool */ | |
611 | SCM_DEFER_INTS; | |
612 | SCM_SETCDR (handle, SCM_CDR (print_state_pool)); | |
613 | SCM_SETCDR (print_state_pool, handle); | |
614 | SCM_ALLOW_INTS; | |
a51ea417 MD |
615 | } |
616 | ||
0f2d19dd JB |
617 | |
618 | /* Print an integer. | |
619 | */ | |
1cc91f1b | 620 | |
0f2d19dd JB |
621 | void |
622 | scm_intprint (n, radix, port) | |
623 | long n; | |
624 | int radix; | |
625 | SCM port; | |
0f2d19dd JB |
626 | { |
627 | char num_buf[SCM_INTBUFLEN]; | |
628 | scm_gen_write (scm_regular_string, num_buf, scm_iint2str (n, radix, num_buf), port); | |
629 | } | |
630 | ||
631 | /* Print an object of unrecognized type. | |
632 | */ | |
1cc91f1b | 633 | |
0f2d19dd JB |
634 | void |
635 | scm_ipruk (hdr, ptr, port) | |
636 | char *hdr; | |
637 | SCM ptr; | |
638 | SCM port; | |
0f2d19dd JB |
639 | { |
640 | scm_gen_puts (scm_regular_string, "#<unknown-", port); | |
641 | scm_gen_puts (scm_regular_string, hdr, port); | |
642 | if (SCM_CELLP (ptr)) | |
643 | { | |
644 | scm_gen_puts (scm_regular_string, " (0x", port); | |
645 | scm_intprint (SCM_CAR (ptr), 16, port); | |
646 | scm_gen_puts (scm_regular_string, " . 0x", port); | |
647 | scm_intprint (SCM_CDR (ptr), 16, port); | |
648 | scm_gen_puts (scm_regular_string, ") @", port); | |
649 | } | |
650 | scm_gen_puts (scm_regular_string, " 0x", port); | |
651 | scm_intprint (ptr, 16, port); | |
652 | scm_gen_putc ('>', port); | |
653 | } | |
654 | ||
655 | /* Print a list. | |
656 | */ | |
a51ea417 | 657 | |
1cc91f1b | 658 | |
0f2d19dd | 659 | void |
c62fbfe1 | 660 | scm_iprlist (hdr, exp, tlr, port, pstate) |
0f2d19dd JB |
661 | char *hdr; |
662 | SCM exp; | |
663 | char tlr; | |
664 | SCM port; | |
c62fbfe1 | 665 | scm_print_state *pstate; |
0f2d19dd | 666 | { |
c62fbfe1 MD |
667 | register int i; |
668 | register SCM hare, tortoise; | |
669 | int floor = pstate->top - 2; | |
0f2d19dd JB |
670 | scm_gen_puts (scm_regular_string, hdr, port); |
671 | /* CHECK_INTS; */ | |
c62fbfe1 MD |
672 | if (pstate->fancyp) |
673 | goto fancy_printing; | |
674 | ||
675 | /* Run a hare and tortoise so that total time complexity will be | |
676 | O(depth * N) instead of O(N^2). */ | |
677 | hare = SCM_CDR (exp); | |
678 | tortoise = exp; | |
2fab3faa | 679 | while (SCM_NIMP (hare) && SCM_ECONSP (hare)) |
c62fbfe1 MD |
680 | { |
681 | if (hare == tortoise) | |
682 | goto fancy_printing; | |
683 | hare = SCM_CDR (hare); | |
2fab3faa | 684 | if (SCM_IMP (hare) || SCM_NECONSP (hare)) |
c62fbfe1 MD |
685 | break; |
686 | hare = SCM_CDR (hare); | |
687 | tortoise = SCM_CDR (tortoise); | |
688 | } | |
689 | ||
690 | /* No cdr cycles intrinsic to this list */ | |
691 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
0f2d19dd JB |
692 | exp = SCM_CDR (exp); |
693 | for (; SCM_NIMP (exp); exp = SCM_CDR (exp)) | |
694 | { | |
695 | if (SCM_NECONSP (exp)) | |
696 | break; | |
c62fbfe1 MD |
697 | for (i = floor; i >= 0; --i) |
698 | if (pstate->ref_stack[i] == exp) | |
699 | goto circref; | |
700 | PUSH_REF (pstate, exp); | |
0f2d19dd JB |
701 | scm_gen_putc (' ', port); |
702 | /* CHECK_INTS; */ | |
c62fbfe1 | 703 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
0f2d19dd JB |
704 | } |
705 | if (SCM_NNULLP (exp)) | |
706 | { | |
707 | scm_gen_puts (scm_regular_string, " . ", port); | |
c62fbfe1 | 708 | scm_iprin1 (exp, port, pstate); |
0f2d19dd | 709 | } |
c62fbfe1 | 710 | |
a51ea417 | 711 | end: |
0f2d19dd | 712 | scm_gen_putc (tlr, port); |
c62fbfe1 | 713 | pstate->top = floor + 2; |
a51ea417 | 714 | return; |
c62fbfe1 MD |
715 | |
716 | fancy_printing: | |
717 | { | |
718 | int n = pstate->length; | |
719 | ||
720 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
721 | exp = SCM_CDR (exp); --n; | |
722 | for (; SCM_NIMP (exp); exp = SCM_CDR (exp)) | |
723 | { | |
724 | if (SCM_NECONSP (exp)) | |
725 | break; | |
726 | for (i = 0; i < pstate->top; ++i) | |
727 | if (pstate->ref_stack[i] == exp) | |
728 | goto fancy_circref; | |
729 | if (pstate->fancyp) | |
730 | { | |
731 | if (n == 0) | |
732 | { | |
733 | scm_gen_puts (scm_regular_string, " ...", port); | |
734 | goto skip_tail; | |
735 | } | |
736 | else | |
737 | --n; | |
738 | } | |
739 | PUSH_REF(pstate, exp); | |
740 | ++pstate->list_offset; | |
741 | scm_gen_putc (' ', port); | |
742 | /* CHECK_INTS; */ | |
743 | scm_iprin1 (SCM_CAR (exp), port, pstate); | |
744 | } | |
745 | } | |
746 | if (SCM_NNULLP (exp)) | |
747 | { | |
748 | scm_gen_puts (scm_regular_string, " . ", port); | |
749 | scm_iprin1 (exp, port, pstate); | |
750 | } | |
751 | skip_tail: | |
752 | pstate->list_offset -= pstate->top - floor - 2; | |
a51ea417 | 753 | goto end; |
a51ea417 | 754 | |
c62fbfe1 MD |
755 | fancy_circref: |
756 | pstate->list_offset -= pstate->top - floor - 2; | |
757 | ||
758 | circref: | |
759 | scm_gen_puts (scm_regular_string, " . ", port); | |
760 | print_circref (port, pstate, exp); | |
761 | goto end; | |
0f2d19dd JB |
762 | } |
763 | ||
764 | \f | |
765 | ||
766 | SCM_PROC(s_write, "write", 1, 1, 0, scm_write); | |
1cc91f1b | 767 | |
0f2d19dd JB |
768 | SCM |
769 | scm_write (obj, port) | |
770 | SCM obj; | |
771 | SCM port; | |
0f2d19dd JB |
772 | { |
773 | if (SCM_UNBNDP (port)) | |
774 | port = scm_cur_outp; | |
775 | else | |
776 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG2, s_write); | |
a51ea417 | 777 | scm_prin1 (obj, port, 1); |
0f2d19dd JB |
778 | #ifdef HAVE_PIPE |
779 | # ifdef EPIPE | |
780 | if (EPIPE == errno) | |
781 | scm_close_port (port); | |
782 | # endif | |
783 | #endif | |
784 | return SCM_UNSPECIFIED; | |
785 | } | |
786 | ||
787 | ||
788 | SCM_PROC(s_display, "display", 1, 1, 0, scm_display); | |
1cc91f1b | 789 | |
0f2d19dd JB |
790 | SCM |
791 | scm_display (obj, port) | |
792 | SCM obj; | |
793 | SCM port; | |
0f2d19dd JB |
794 | { |
795 | if (SCM_UNBNDP (port)) | |
796 | port = scm_cur_outp; | |
797 | else | |
798 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG2, s_display); | |
a51ea417 | 799 | scm_prin1 (obj, port, 0); |
0f2d19dd JB |
800 | #ifdef HAVE_PIPE |
801 | # ifdef EPIPE | |
802 | if (EPIPE == errno) | |
803 | scm_close_port (port); | |
804 | # endif | |
805 | #endif | |
806 | return SCM_UNSPECIFIED; | |
807 | } | |
808 | ||
809 | SCM_PROC(s_newline, "newline", 0, 1, 0, scm_newline); | |
1cc91f1b | 810 | |
0f2d19dd JB |
811 | SCM |
812 | scm_newline (port) | |
813 | SCM port; | |
0f2d19dd JB |
814 | { |
815 | if (SCM_UNBNDP (port)) | |
816 | port = scm_cur_outp; | |
817 | else | |
818 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG1, s_newline); | |
819 | scm_gen_putc ('\n', port); | |
820 | #ifdef HAVE_PIPE | |
821 | # ifdef EPIPE | |
822 | if (EPIPE == errno) | |
823 | scm_close_port (port); | |
824 | else | |
825 | # endif | |
826 | #endif | |
827 | if (port == scm_cur_outp) | |
828 | scm_fflush (port); | |
829 | return SCM_UNSPECIFIED; | |
830 | } | |
831 | ||
832 | SCM_PROC(s_write_char, "write-char", 1, 1, 0, scm_write_char); | |
1cc91f1b | 833 | |
0f2d19dd JB |
834 | SCM |
835 | scm_write_char (chr, port) | |
836 | SCM chr; | |
837 | SCM port; | |
0f2d19dd JB |
838 | { |
839 | if (SCM_UNBNDP (port)) | |
840 | port = scm_cur_outp; | |
841 | else | |
842 | SCM_ASSERT (SCM_NIMP (port) && SCM_OPOUTPORTP (port), port, SCM_ARG2, s_write_char); | |
843 | SCM_ASSERT (SCM_ICHRP (chr), chr, SCM_ARG1, s_write_char); | |
844 | scm_gen_putc ((int) SCM_ICHR (chr), port); | |
845 | #ifdef HAVE_PIPE | |
846 | # ifdef EPIPE | |
847 | if (EPIPE == errno) | |
848 | scm_close_port (port); | |
849 | # endif | |
850 | #endif | |
851 | return SCM_UNSPECIFIED; | |
852 | } | |
853 | ||
854 | ||
855 | \f | |
856 | ||
1cc91f1b | 857 | |
0f2d19dd JB |
858 | void |
859 | scm_init_print () | |
0f2d19dd | 860 | { |
c62fbfe1 | 861 | SCM vtable, type; |
b7ff98dd | 862 | scm_init_opts (scm_print_options, scm_print_opts, SCM_N_PRINT_OPTIONS); |
2dfc85c0 | 863 | vtable = scm_make_vtable_vtable (scm_make_struct_layout (scm_nullstr), SCM_INUM0, SCM_EOL); |
c62fbfe1 MD |
864 | type = scm_make_struct (vtable, |
865 | SCM_INUM0, | |
866 | scm_cons (scm_make_struct_layout (scm_makfrom0str (SCM_PRINT_STATE_LAYOUT)), | |
867 | SCM_EOL)); | |
868 | print_state_pool = scm_permanent_object (scm_cons (type, SCM_EOL)); | |
0f2d19dd JB |
869 | #include "print.x" |
870 | } |