| 1 | /* Copyright (C) 1995-1999 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, Inc., 59 Temple Place, Suite 330, |
| 16 | * Boston, MA 02111-1307 USA |
| 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. |
| 40 | * If you do not wish that, delete this exception notice. */ |
| 41 | \f |
| 42 | |
| 43 | #include <stdio.h> |
| 44 | #include "_scm.h" |
| 45 | #include "chars.h" |
| 46 | #include "genio.h" |
| 47 | #include "smob.h" |
| 48 | #include "eval.h" |
| 49 | #include "macros.h" |
| 50 | #include "procprop.h" |
| 51 | #include "read.h" |
| 52 | #include "weaks.h" |
| 53 | #include "unif.h" |
| 54 | #include "alist.h" |
| 55 | #include "struct.h" |
| 56 | #include "objects.h" |
| 57 | |
| 58 | #include "print.h" |
| 59 | \f |
| 60 | |
| 61 | /* {Names of immediate symbols} |
| 62 | * |
| 63 | * This table must agree with the declarations in scm.h: {Immediate Symbols}. |
| 64 | */ |
| 65 | |
| 66 | char *scm_isymnames[] = |
| 67 | { |
| 68 | /* This table must agree with the declarations */ |
| 69 | "#@and", |
| 70 | "#@begin", |
| 71 | "#@case", |
| 72 | "#@cond", |
| 73 | "#@do", |
| 74 | "#@if", |
| 75 | "#@lambda", |
| 76 | "#@let", |
| 77 | "#@let*", |
| 78 | "#@letrec", |
| 79 | "#@or", |
| 80 | "#@quote", |
| 81 | "#@set!", |
| 82 | "#@define", |
| 83 | #if 0 |
| 84 | "#@literal-variable-ref", |
| 85 | "#@literal-variable-set!", |
| 86 | #endif |
| 87 | "#@apply", |
| 88 | "#@call-with-current-continuation", |
| 89 | |
| 90 | /* user visible ISYMS */ |
| 91 | /* other keywords */ |
| 92 | /* Flags */ |
| 93 | |
| 94 | "#f", |
| 95 | "#t", |
| 96 | "#<undefined>", |
| 97 | "#<eof>", |
| 98 | "()", |
| 99 | "#<unspecified>", |
| 100 | "#@dispatch", |
| 101 | "#@slot-ref", |
| 102 | "#@slot-set!", |
| 103 | |
| 104 | /* Multi-language support */ |
| 105 | |
| 106 | "#@nil-cond", |
| 107 | "#@nil-ify", |
| 108 | "#@t-ify", |
| 109 | "#@0-cond", |
| 110 | "#@0-ify", |
| 111 | "#@1-ify", |
| 112 | "#@bind", |
| 113 | |
| 114 | "#@delay" |
| 115 | }; |
| 116 | |
| 117 | scm_option scm_print_opts[] = { |
| 118 | { SCM_OPTION_SCM, "closure-hook", SCM_BOOL_F, |
| 119 | "Hook for printing closures." }, |
| 120 | { SCM_OPTION_BOOLEAN, "source", 0, |
| 121 | "Print closures with source." } |
| 122 | }; |
| 123 | |
| 124 | SCM_PROC (s_print_options, "print-options-interface", 0, 1, 0, scm_print_options); |
| 125 | |
| 126 | SCM |
| 127 | scm_print_options (setting) |
| 128 | SCM setting; |
| 129 | { |
| 130 | SCM ans = scm_options (setting, |
| 131 | scm_print_opts, |
| 132 | SCM_N_PRINT_OPTIONS, |
| 133 | s_print_options); |
| 134 | return ans; |
| 135 | } |
| 136 | |
| 137 | \f |
| 138 | /* {Printing of Scheme Objects} |
| 139 | */ |
| 140 | |
| 141 | /* Detection of circular references. |
| 142 | * |
| 143 | * Due to other constraints in the implementation, this code has bad |
| 144 | * time complexity (O (depth * N)), The printer code will be |
| 145 | * completely rewritten before next release of Guile. The new code |
| 146 | * will be O(N). |
| 147 | */ |
| 148 | #define PUSH_REF(pstate, obj) \ |
| 149 | { \ |
| 150 | pstate->ref_stack[pstate->top++] = (obj); \ |
| 151 | if (pstate->top == pstate->ceiling) \ |
| 152 | grow_ref_stack (pstate); \ |
| 153 | } |
| 154 | |
| 155 | #define ENTER_NESTED_DATA(pstate, obj, label) \ |
| 156 | { \ |
| 157 | register unsigned long i; \ |
| 158 | for (i = 0; i < pstate->top; ++i) \ |
| 159 | if (pstate->ref_stack[i] == (obj)) \ |
| 160 | goto label; \ |
| 161 | if (pstate->fancyp) \ |
| 162 | { \ |
| 163 | if (pstate->top - pstate->list_offset >= pstate->level) \ |
| 164 | { \ |
| 165 | scm_putc ('#', port); \ |
| 166 | return; \ |
| 167 | } \ |
| 168 | } \ |
| 169 | PUSH_REF(pstate, obj); \ |
| 170 | } \ |
| 171 | |
| 172 | #define EXIT_NESTED_DATA(pstate) { --pstate->top; } |
| 173 | |
| 174 | SCM scm_print_state_vtable; |
| 175 | |
| 176 | static SCM print_state_pool; |
| 177 | |
| 178 | #ifdef GUILE_DEBUG /* Used for debugging purposes */ |
| 179 | SCM_PROC(s_current_pstate, "current-pstate", 0, 0, 0, scm_current_pstate); |
| 180 | |
| 181 | SCM |
| 182 | scm_current_pstate () |
| 183 | { |
| 184 | return SCM_CADR (print_state_pool); |
| 185 | } |
| 186 | #endif |
| 187 | |
| 188 | #define PSTATE_SIZE 50L |
| 189 | |
| 190 | static SCM make_print_state SCM_P ((void)); |
| 191 | |
| 192 | static SCM |
| 193 | make_print_state () |
| 194 | { |
| 195 | SCM print_state = scm_make_struct (SCM_CAR (print_state_pool), /* pstate type */ |
| 196 | SCM_INUM0, |
| 197 | SCM_EOL); |
| 198 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); |
| 199 | pstate->ref_vect = scm_make_vector (SCM_MAKINUM (PSTATE_SIZE), |
| 200 | SCM_UNDEFINED); |
| 201 | pstate->ref_stack = SCM_VELTS (pstate->ref_vect); |
| 202 | pstate->ceiling = SCM_LENGTH (pstate->ref_vect); |
| 203 | return print_state; |
| 204 | } |
| 205 | |
| 206 | SCM |
| 207 | scm_make_print_state () |
| 208 | { |
| 209 | SCM answer = 0; |
| 210 | |
| 211 | /* First try to allocate a print state from the pool */ |
| 212 | SCM_DEFER_INTS; |
| 213 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) |
| 214 | { |
| 215 | answer = SCM_CADR (print_state_pool); |
| 216 | SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool)); |
| 217 | } |
| 218 | SCM_ALLOW_INTS; |
| 219 | |
| 220 | return answer ? answer : make_print_state (); |
| 221 | } |
| 222 | |
| 223 | void |
| 224 | scm_free_print_state (print_state) |
| 225 | SCM print_state; |
| 226 | { |
| 227 | SCM handle; |
| 228 | scm_print_state *pstate = SCM_PRINT_STATE (print_state); |
| 229 | /* Cleanup before returning print state to pool. |
| 230 | * It is better to do it here. Doing it in scm_prin1 |
| 231 | * would cost more since that function is called much more |
| 232 | * often. |
| 233 | */ |
| 234 | pstate->fancyp = 0; |
| 235 | pstate->revealed = 0; |
| 236 | SCM_NEWCELL (handle); |
| 237 | SCM_DEFER_INTS; |
| 238 | SCM_SETCAR (handle, print_state); |
| 239 | SCM_SETCDR (handle, SCM_CDR (print_state_pool)); |
| 240 | SCM_SETCDR (print_state_pool, handle); |
| 241 | SCM_ALLOW_INTS; |
| 242 | } |
| 243 | |
| 244 | static void grow_ref_stack SCM_P ((scm_print_state *pstate)); |
| 245 | |
| 246 | static void |
| 247 | grow_ref_stack (pstate) |
| 248 | scm_print_state *pstate; |
| 249 | { |
| 250 | int new_size = 2 * pstate->ceiling; |
| 251 | scm_vector_set_length_x (pstate->ref_vect, SCM_MAKINUM (new_size)); |
| 252 | pstate->ref_stack = SCM_VELTS (pstate->ref_vect); |
| 253 | pstate->ceiling = new_size; |
| 254 | } |
| 255 | |
| 256 | |
| 257 | static void print_circref SCM_P ((SCM port, scm_print_state *pstate, SCM ref)); |
| 258 | |
| 259 | static void |
| 260 | print_circref (port, pstate, ref) |
| 261 | SCM port; |
| 262 | scm_print_state *pstate; |
| 263 | SCM ref; |
| 264 | { |
| 265 | register int i; |
| 266 | int self = pstate->top - 1; |
| 267 | i = pstate->top - 1; |
| 268 | if (SCM_CONSP (pstate->ref_stack[i])) |
| 269 | { |
| 270 | while (i > 0) |
| 271 | { |
| 272 | if (SCM_NCONSP (pstate->ref_stack[i - 1]) |
| 273 | || SCM_CDR (pstate->ref_stack[i - 1]) != pstate->ref_stack[i]) |
| 274 | break; |
| 275 | --i; |
| 276 | } |
| 277 | self = i; |
| 278 | } |
| 279 | for (i = pstate->top - 1; 1; --i) |
| 280 | if (pstate->ref_stack[i] == ref) |
| 281 | break; |
| 282 | scm_putc ('#', port); |
| 283 | scm_intprint (i - self, 10, port); |
| 284 | scm_putc ('#', port); |
| 285 | } |
| 286 | |
| 287 | /* Print generally. Handles both write and display according to PSTATE. |
| 288 | */ |
| 289 | SCM_GPROC(s_write, "write", 1, 1, 0, scm_write, g_write); |
| 290 | SCM_GPROC(s_display, "display", 1, 1, 0, scm_display, g_display); |
| 291 | |
| 292 | void |
| 293 | scm_iprin1 (exp, port, pstate) |
| 294 | SCM exp; |
| 295 | SCM port; |
| 296 | scm_print_state *pstate; |
| 297 | { |
| 298 | taloop: |
| 299 | switch (7 & (int) exp) |
| 300 | { |
| 301 | case 2: |
| 302 | case 6: |
| 303 | scm_intprint (SCM_INUM (exp), 10, port); |
| 304 | break; |
| 305 | case 4: |
| 306 | if (SCM_ICHRP (exp)) |
| 307 | { |
| 308 | register long i; |
| 309 | |
| 310 | i = SCM_ICHR (exp); |
| 311 | if (SCM_WRITINGP (pstate)) |
| 312 | { |
| 313 | scm_puts ("#\\", port); |
| 314 | if ((i >= 0) && (i <= ' ') && scm_charnames[i]) |
| 315 | scm_puts (scm_charnames[i], port); |
| 316 | else if (i < 0 || i > '\177') |
| 317 | scm_intprint (i, 8, port); |
| 318 | else |
| 319 | scm_putc (i, port); |
| 320 | } |
| 321 | else |
| 322 | scm_putc (i, port); |
| 323 | } |
| 324 | else if (SCM_IFLAGP (exp) |
| 325 | && ((size_t) SCM_ISYMNUM (exp) < (sizeof scm_isymnames / sizeof (char *)))) |
| 326 | scm_puts (SCM_ISYMCHARS (exp), port); |
| 327 | else if (SCM_ILOCP (exp)) |
| 328 | { |
| 329 | scm_puts ("#@", port); |
| 330 | scm_intprint ((long) SCM_IFRAME (exp), 10, port); |
| 331 | scm_putc (SCM_ICDRP (exp) ? '-' : '+', port); |
| 332 | scm_intprint ((long) SCM_IDIST (exp), 10, port); |
| 333 | } |
| 334 | else |
| 335 | goto idef; |
| 336 | break; |
| 337 | case 1: |
| 338 | /* gloc */ |
| 339 | scm_puts ("#@", port); |
| 340 | exp = SCM_CAR (exp - 1); |
| 341 | goto taloop; |
| 342 | default: |
| 343 | idef: |
| 344 | scm_ipruk ("immediate", exp, port); |
| 345 | break; |
| 346 | case 0: |
| 347 | switch (SCM_TYP7 (exp)) |
| 348 | { |
| 349 | case scm_tcs_cons_gloc: |
| 350 | |
| 351 | if (SCM_CDR (SCM_CAR (exp) - 1L) == 0) |
| 352 | { |
| 353 | ENTER_NESTED_DATA (pstate, exp, circref); |
| 354 | if (SCM_OBJ_CLASS_FLAGS (exp) & SCM_CLASSF_GOOPS) |
| 355 | { |
| 356 | SCM pwps, print = pstate->writingp ? g_write : g_display; |
| 357 | if (!print) |
| 358 | goto print_struct; |
| 359 | SCM_NEWSMOB (pwps, |
| 360 | scm_tc16_port_with_ps, |
| 361 | scm_cons (port, pstate->handle)); |
| 362 | scm_call_generic_2 (print, exp, pwps); |
| 363 | } |
| 364 | else |
| 365 | { |
| 366 | print_struct: |
| 367 | scm_print_struct (exp, port, pstate); |
| 368 | } |
| 369 | EXIT_NESTED_DATA (pstate); |
| 370 | break; |
| 371 | } |
| 372 | |
| 373 | case scm_tcs_cons_imcar: |
| 374 | case scm_tcs_cons_nimcar: |
| 375 | ENTER_NESTED_DATA (pstate, exp, circref); |
| 376 | scm_iprlist ("(", exp, ')', port, pstate); |
| 377 | EXIT_NESTED_DATA (pstate); |
| 378 | break; |
| 379 | circref: |
| 380 | print_circref (port, pstate, exp); |
| 381 | break; |
| 382 | macros: |
| 383 | if (!SCM_CLOSUREP (SCM_CDR (exp))) |
| 384 | goto prinmacro; |
| 385 | case scm_tcs_closures: |
| 386 | /* The user supplied print closure procedure must handle |
| 387 | macro closures as well. */ |
| 388 | if (SCM_FALSEP (scm_procedure_p (SCM_PRINT_CLOSURE)) |
| 389 | || SCM_FALSEP (scm_printer_apply (SCM_PRINT_CLOSURE, |
| 390 | exp, port, pstate))) |
| 391 | { |
| 392 | SCM name, code, env; |
| 393 | if (SCM_TYP16 (exp) == scm_tc16_macro) |
| 394 | { |
| 395 | /* Printing a macro. */ |
| 396 | prinmacro: |
| 397 | name = scm_macro_name (exp); |
| 398 | if (!SCM_CLOSUREP (SCM_CDR (exp))) |
| 399 | { |
| 400 | code = env = 0; |
| 401 | scm_puts ("#<primitive-", port); |
| 402 | } |
| 403 | else |
| 404 | { |
| 405 | code = SCM_CODE (SCM_CDR (exp)); |
| 406 | env = SCM_ENV (SCM_CDR (exp)); |
| 407 | scm_puts ("#<", port); |
| 408 | } |
| 409 | if (SCM_CAR (exp) & (3L << 16)) |
| 410 | scm_puts ("macro", port); |
| 411 | else |
| 412 | scm_puts ("syntax", port); |
| 413 | if (SCM_CAR (exp) & (2L << 16)) |
| 414 | scm_putc ('!', port); |
| 415 | } |
| 416 | else |
| 417 | { |
| 418 | /* Printing a closure. */ |
| 419 | name = scm_procedure_name (exp); |
| 420 | code = SCM_CODE (exp); |
| 421 | env = SCM_ENV (exp); |
| 422 | scm_puts ("#<procedure", port); |
| 423 | } |
| 424 | if (SCM_NIMP (name) && SCM_ROSTRINGP (name)) |
| 425 | { |
| 426 | scm_putc (' ', port); |
| 427 | scm_puts (SCM_ROCHARS (name), port); |
| 428 | } |
| 429 | if (code) |
| 430 | { |
| 431 | if (SCM_PRINT_SOURCE_P) |
| 432 | { |
| 433 | code = scm_unmemocopy (code, |
| 434 | SCM_EXTEND_ENV (SCM_CAR (code), |
| 435 | SCM_EOL, |
| 436 | env)); |
| 437 | ENTER_NESTED_DATA (pstate, exp, circref); |
| 438 | scm_iprlist (" ", code, '>', port, pstate); |
| 439 | EXIT_NESTED_DATA (pstate); |
| 440 | } |
| 441 | else |
| 442 | { |
| 443 | if (SCM_TYP16 (exp) != scm_tc16_macro) |
| 444 | { |
| 445 | scm_putc (' ', port); |
| 446 | scm_iprin1 (SCM_CAR (code), port, pstate); |
| 447 | } |
| 448 | scm_putc ('>', port); |
| 449 | } |
| 450 | } |
| 451 | else |
| 452 | scm_putc ('>', port); |
| 453 | } |
| 454 | break; |
| 455 | case scm_tc7_substring: |
| 456 | case scm_tc7_string: |
| 457 | if (SCM_WRITINGP (pstate)) |
| 458 | { |
| 459 | scm_sizet i; |
| 460 | |
| 461 | scm_putc ('"', port); |
| 462 | for (i = 0; i < SCM_ROLENGTH (exp); ++i) |
| 463 | switch (SCM_ROCHARS (exp)[i]) |
| 464 | { |
| 465 | case '"': |
| 466 | case '\\': |
| 467 | scm_putc ('\\', port); |
| 468 | default: |
| 469 | scm_putc (SCM_ROCHARS (exp)[i], port); |
| 470 | } |
| 471 | scm_putc ('"', port); |
| 472 | break; |
| 473 | } |
| 474 | else |
| 475 | scm_lfwrite (SCM_ROCHARS (exp), (scm_sizet) SCM_ROLENGTH (exp), |
| 476 | port); |
| 477 | break; |
| 478 | case scm_tcs_symbols: |
| 479 | { |
| 480 | int pos; |
| 481 | int end; |
| 482 | int len; |
| 483 | char * str; |
| 484 | int weird; |
| 485 | int maybe_weird; |
| 486 | int mw_pos = 0; |
| 487 | |
| 488 | len = SCM_LENGTH (exp); |
| 489 | str = SCM_CHARS (exp); |
| 490 | scm_remember (&exp); |
| 491 | pos = 0; |
| 492 | weird = 0; |
| 493 | maybe_weird = 0; |
| 494 | |
| 495 | if (len == 0) |
| 496 | scm_lfwrite ("#{}#", 4, port); |
| 497 | |
| 498 | for (end = pos; end < len; ++end) |
| 499 | switch (str[end]) |
| 500 | { |
| 501 | #ifdef BRACKETS_AS_PARENS |
| 502 | case '[': |
| 503 | case ']': |
| 504 | #endif |
| 505 | case '(': |
| 506 | case ')': |
| 507 | case '"': |
| 508 | case ';': |
| 509 | case SCM_WHITE_SPACES: |
| 510 | case SCM_LINE_INCREMENTORS: |
| 511 | weird_handler: |
| 512 | if (maybe_weird) |
| 513 | { |
| 514 | end = mw_pos; |
| 515 | maybe_weird = 0; |
| 516 | } |
| 517 | if (!weird) |
| 518 | { |
| 519 | scm_lfwrite ("#{", 2, port); |
| 520 | weird = 1; |
| 521 | } |
| 522 | if (pos < end) |
| 523 | { |
| 524 | scm_lfwrite (str + pos, end - pos, port); |
| 525 | } |
| 526 | { |
| 527 | char buf[2]; |
| 528 | buf[0] = '\\'; |
| 529 | buf[1] = str[end]; |
| 530 | scm_lfwrite (buf, 2, port); |
| 531 | } |
| 532 | pos = end + 1; |
| 533 | break; |
| 534 | case '\\': |
| 535 | if (weird) |
| 536 | goto weird_handler; |
| 537 | if (!maybe_weird) |
| 538 | { |
| 539 | maybe_weird = 1; |
| 540 | mw_pos = pos; |
| 541 | } |
| 542 | break; |
| 543 | case '}': |
| 544 | case '#': |
| 545 | if (weird) |
| 546 | goto weird_handler; |
| 547 | break; |
| 548 | default: |
| 549 | break; |
| 550 | } |
| 551 | if (pos < end) |
| 552 | scm_lfwrite (str + pos, end - pos, port); |
| 553 | if (weird) |
| 554 | scm_lfwrite ("}#", 2, port); |
| 555 | break; |
| 556 | } |
| 557 | case scm_tc7_wvect: |
| 558 | ENTER_NESTED_DATA (pstate, exp, circref); |
| 559 | if (SCM_IS_WHVEC (exp)) |
| 560 | scm_puts ("#wh(", port); |
| 561 | else |
| 562 | scm_puts ("#w(", port); |
| 563 | goto common_vector_printer; |
| 564 | |
| 565 | case scm_tc7_vector: |
| 566 | ENTER_NESTED_DATA (pstate, exp, circref); |
| 567 | scm_puts ("#(", port); |
| 568 | common_vector_printer: |
| 569 | { |
| 570 | register long i; |
| 571 | int last = SCM_LENGTH (exp) - 1; |
| 572 | int cutp = 0; |
| 573 | if (pstate->fancyp && SCM_LENGTH (exp) > pstate->length) |
| 574 | { |
| 575 | last = pstate->length - 1; |
| 576 | cutp = 1; |
| 577 | } |
| 578 | for (i = 0; i < last; ++i) |
| 579 | { |
| 580 | /* CHECK_INTS; */ |
| 581 | scm_iprin1 (SCM_VELTS (exp)[i], port, pstate); |
| 582 | scm_putc (' ', port); |
| 583 | } |
| 584 | if (i == last) |
| 585 | { |
| 586 | /* CHECK_INTS; */ |
| 587 | scm_iprin1 (SCM_VELTS (exp)[i], port, pstate); |
| 588 | } |
| 589 | if (cutp) |
| 590 | scm_puts (" ...", port); |
| 591 | scm_putc (')', port); |
| 592 | } |
| 593 | EXIT_NESTED_DATA (pstate); |
| 594 | break; |
| 595 | #ifdef HAVE_ARRAYS |
| 596 | case scm_tc7_bvect: |
| 597 | case scm_tc7_byvect: |
| 598 | case scm_tc7_svect: |
| 599 | case scm_tc7_ivect: |
| 600 | case scm_tc7_uvect: |
| 601 | case scm_tc7_fvect: |
| 602 | case scm_tc7_dvect: |
| 603 | case scm_tc7_cvect: |
| 604 | #ifdef HAVE_LONG_LONGS |
| 605 | case scm_tc7_llvect: |
| 606 | #endif |
| 607 | scm_raprin1 (exp, port, pstate); |
| 608 | break; |
| 609 | #endif |
| 610 | case scm_tcs_subrs: |
| 611 | scm_puts (SCM_SUBR_GENERIC (exp) && *SCM_SUBR_GENERIC (exp) |
| 612 | ? "#<primitive-generic " |
| 613 | : "#<primitive-procedure ", |
| 614 | port); |
| 615 | scm_puts (SCM_CHARS (SCM_SNAME (exp)), port); |
| 616 | scm_putc ('>', port); |
| 617 | break; |
| 618 | #ifdef CCLO |
| 619 | case scm_tc7_cclo: |
| 620 | { |
| 621 | SCM proc = SCM_CCLO_SUBR (exp); |
| 622 | if (proc == scm_f_gsubr_apply) |
| 623 | { |
| 624 | /* Print gsubrs as primitives */ |
| 625 | SCM name = scm_procedure_name (exp); |
| 626 | scm_puts ("#<primitive-procedure", port); |
| 627 | if (SCM_NFALSEP (name)) |
| 628 | { |
| 629 | scm_putc (' ', port); |
| 630 | scm_puts (SCM_CHARS (name), port); |
| 631 | } |
| 632 | } |
| 633 | else |
| 634 | { |
| 635 | scm_puts ("#<compiled-closure ", port); |
| 636 | scm_iprin1 (proc, port, pstate); |
| 637 | } |
| 638 | scm_putc ('>', port); |
| 639 | } |
| 640 | break; |
| 641 | #endif |
| 642 | case scm_tc7_pws: |
| 643 | scm_puts ("#<procedure-with-setter", port); |
| 644 | { |
| 645 | SCM name = scm_procedure_name (exp); |
| 646 | if (SCM_NFALSEP (name)) |
| 647 | { |
| 648 | scm_putc (' ', port); |
| 649 | scm_puts (SCM_ROCHARS (name), port); |
| 650 | } |
| 651 | } |
| 652 | scm_putc ('>', port); |
| 653 | break; |
| 654 | case scm_tc7_contin: |
| 655 | scm_puts ("#<continuation ", port); |
| 656 | scm_intprint (SCM_LENGTH (exp), 10, port); |
| 657 | scm_puts (" @ ", port); |
| 658 | scm_intprint ((long) SCM_CHARS (exp), 16, port); |
| 659 | scm_putc ('>', port); |
| 660 | break; |
| 661 | case scm_tc7_port: |
| 662 | { |
| 663 | register long i = SCM_PTOBNUM (exp); |
| 664 | if (i < scm_numptob |
| 665 | && scm_ptobs[i].print |
| 666 | && (scm_ptobs[i].print) (exp, port, pstate)) |
| 667 | break; |
| 668 | goto punk; |
| 669 | } |
| 670 | case scm_tc7_smob: |
| 671 | { |
| 672 | register long i; |
| 673 | ENTER_NESTED_DATA (pstate, exp, circref); |
| 674 | i = SCM_SMOBNUM (exp); |
| 675 | if (i < scm_numsmob && scm_smobs[i].print |
| 676 | && (scm_smobs[i].print) (exp, port, pstate)) |
| 677 | { |
| 678 | EXIT_NESTED_DATA (pstate); |
| 679 | break; |
| 680 | } |
| 681 | EXIT_NESTED_DATA (pstate); |
| 682 | /* Macros have their print field set to NULL. They are |
| 683 | handled at the same place as closures in order to achieve |
| 684 | non-redundancy. Placing the condition here won't slow |
| 685 | down printing of other smobs. */ |
| 686 | if (SCM_TYP16 (exp) == scm_tc16_macro) |
| 687 | goto macros; |
| 688 | } |
| 689 | default: |
| 690 | punk: |
| 691 | scm_ipruk ("type", exp, port); |
| 692 | } |
| 693 | } |
| 694 | } |
| 695 | |
| 696 | /* Print states are necessary for circular reference safe printing. |
| 697 | * They are also expensive to allocate. Therefore print states are |
| 698 | * kept in a pool so that they can be reused. |
| 699 | */ |
| 700 | |
| 701 | /* The PORT argument can also be a print-state/port pair, which will |
| 702 | * then be used instead of allocating a new print state. This is |
| 703 | * useful for continuing a chain of print calls from Scheme. */ |
| 704 | |
| 705 | void |
| 706 | scm_prin1 (exp, port, writingp) |
| 707 | SCM exp; |
| 708 | SCM port; |
| 709 | int writingp; |
| 710 | { |
| 711 | SCM handle = SCM_BOOL_F; /* Will GC protect the handle whilst unlinked */ |
| 712 | SCM pstate_scm; |
| 713 | scm_print_state *pstate; |
| 714 | |
| 715 | /* If PORT is a print-state/port pair, use that. Else create a new |
| 716 | print-state. */ |
| 717 | |
| 718 | if (SCM_NIMP (port) && SCM_PORT_WITH_PS_P (port)) |
| 719 | { |
| 720 | pstate_scm = SCM_PORT_WITH_PS_PS (port); |
| 721 | port = SCM_PORT_WITH_PS_PORT (port); |
| 722 | } |
| 723 | else |
| 724 | { |
| 725 | /* First try to allocate a print state from the pool */ |
| 726 | SCM_DEFER_INTS; |
| 727 | if (SCM_NNULLP (SCM_CDR (print_state_pool))) |
| 728 | { |
| 729 | handle = SCM_CDR (print_state_pool); |
| 730 | SCM_SETCDR (print_state_pool, SCM_CDDR (print_state_pool)); |
| 731 | } |
| 732 | SCM_ALLOW_INTS; |
| 733 | if (handle == SCM_BOOL_F) |
| 734 | handle = scm_cons (make_print_state (), SCM_EOL); |
| 735 | pstate_scm = SCM_CAR (handle); |
| 736 | } |
| 737 | |
| 738 | pstate = SCM_PRINT_STATE (pstate_scm); |
| 739 | pstate->writingp = writingp; |
| 740 | scm_iprin1 (exp, port, pstate); |
| 741 | |
| 742 | /* Return print state to pool if it has been created above and |
| 743 | hasn't escaped to Scheme. */ |
| 744 | |
| 745 | if (handle != SCM_BOOL_F && !pstate->revealed) |
| 746 | { |
| 747 | SCM_DEFER_INTS; |
| 748 | SCM_SETCDR (handle, SCM_CDR (print_state_pool)); |
| 749 | SCM_SETCDR (print_state_pool, handle); |
| 750 | SCM_ALLOW_INTS; |
| 751 | } |
| 752 | } |
| 753 | |
| 754 | |
| 755 | /* Print an integer. |
| 756 | */ |
| 757 | |
| 758 | void |
| 759 | scm_intprint (n, radix, port) |
| 760 | long n; |
| 761 | int radix; |
| 762 | SCM port; |
| 763 | { |
| 764 | char num_buf[SCM_INTBUFLEN]; |
| 765 | scm_lfwrite (num_buf, scm_iint2str (n, radix, num_buf), port); |
| 766 | } |
| 767 | |
| 768 | /* Print an object of unrecognized type. |
| 769 | */ |
| 770 | |
| 771 | void |
| 772 | scm_ipruk (hdr, ptr, port) |
| 773 | char *hdr; |
| 774 | SCM ptr; |
| 775 | SCM port; |
| 776 | { |
| 777 | scm_puts ("#<unknown-", port); |
| 778 | scm_puts (hdr, port); |
| 779 | if (SCM_CELLP (ptr)) |
| 780 | { |
| 781 | scm_puts (" (0x", port); |
| 782 | scm_intprint (SCM_CAR (ptr), 16, port); |
| 783 | scm_puts (" . 0x", port); |
| 784 | scm_intprint (SCM_CDR (ptr), 16, port); |
| 785 | scm_puts (") @", port); |
| 786 | } |
| 787 | scm_puts (" 0x", port); |
| 788 | scm_intprint (ptr, 16, port); |
| 789 | scm_putc ('>', port); |
| 790 | } |
| 791 | |
| 792 | /* Print a list. |
| 793 | */ |
| 794 | |
| 795 | |
| 796 | void |
| 797 | scm_iprlist (hdr, exp, tlr, port, pstate) |
| 798 | char *hdr; |
| 799 | SCM exp; |
| 800 | int tlr; |
| 801 | SCM port; |
| 802 | scm_print_state *pstate; |
| 803 | { |
| 804 | register SCM hare, tortoise; |
| 805 | int floor = pstate->top - 2; |
| 806 | scm_puts (hdr, port); |
| 807 | /* CHECK_INTS; */ |
| 808 | if (pstate->fancyp) |
| 809 | goto fancy_printing; |
| 810 | |
| 811 | /* Run a hare and tortoise so that total time complexity will be |
| 812 | O(depth * N) instead of O(N^2). */ |
| 813 | hare = SCM_CDR (exp); |
| 814 | tortoise = exp; |
| 815 | while (SCM_NIMP (hare) && SCM_ECONSP (hare)) |
| 816 | { |
| 817 | if (hare == tortoise) |
| 818 | goto fancy_printing; |
| 819 | hare = SCM_CDR (hare); |
| 820 | if (SCM_IMP (hare) || SCM_NECONSP (hare)) |
| 821 | break; |
| 822 | hare = SCM_CDR (hare); |
| 823 | tortoise = SCM_CDR (tortoise); |
| 824 | } |
| 825 | |
| 826 | /* No cdr cycles intrinsic to this list */ |
| 827 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
| 828 | exp = SCM_CDR (exp); |
| 829 | for (; SCM_NIMP (exp); exp = SCM_CDR (exp)) |
| 830 | { |
| 831 | register int i; |
| 832 | |
| 833 | if (SCM_NECONSP (exp)) |
| 834 | break; |
| 835 | for (i = floor; i >= 0; --i) |
| 836 | if (pstate->ref_stack[i] == exp) |
| 837 | goto circref; |
| 838 | PUSH_REF (pstate, exp); |
| 839 | scm_putc (' ', port); |
| 840 | /* CHECK_INTS; */ |
| 841 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
| 842 | } |
| 843 | if (SCM_NNULLP (exp)) |
| 844 | { |
| 845 | scm_puts (" . ", port); |
| 846 | scm_iprin1 (exp, port, pstate); |
| 847 | } |
| 848 | |
| 849 | end: |
| 850 | scm_putc (tlr, port); |
| 851 | pstate->top = floor + 2; |
| 852 | return; |
| 853 | |
| 854 | fancy_printing: |
| 855 | { |
| 856 | int n = pstate->length; |
| 857 | |
| 858 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
| 859 | exp = SCM_CDR (exp); --n; |
| 860 | for (; SCM_NIMP (exp); exp = SCM_CDR (exp)) |
| 861 | { |
| 862 | register unsigned long i; |
| 863 | |
| 864 | if (SCM_NECONSP (exp)) |
| 865 | break; |
| 866 | for (i = 0; i < pstate->top; ++i) |
| 867 | if (pstate->ref_stack[i] == exp) |
| 868 | goto fancy_circref; |
| 869 | if (pstate->fancyp) |
| 870 | { |
| 871 | if (n == 0) |
| 872 | { |
| 873 | scm_puts (" ...", port); |
| 874 | goto skip_tail; |
| 875 | } |
| 876 | else |
| 877 | --n; |
| 878 | } |
| 879 | PUSH_REF(pstate, exp); |
| 880 | ++pstate->list_offset; |
| 881 | scm_putc (' ', port); |
| 882 | /* CHECK_INTS; */ |
| 883 | scm_iprin1 (SCM_CAR (exp), port, pstate); |
| 884 | } |
| 885 | } |
| 886 | if (SCM_NNULLP (exp)) |
| 887 | { |
| 888 | scm_puts (" . ", port); |
| 889 | scm_iprin1 (exp, port, pstate); |
| 890 | } |
| 891 | skip_tail: |
| 892 | pstate->list_offset -= pstate->top - floor - 2; |
| 893 | goto end; |
| 894 | |
| 895 | fancy_circref: |
| 896 | pstate->list_offset -= pstate->top - floor - 2; |
| 897 | |
| 898 | circref: |
| 899 | scm_puts (" . ", port); |
| 900 | print_circref (port, pstate, exp); |
| 901 | goto end; |
| 902 | } |
| 903 | |
| 904 | \f |
| 905 | |
| 906 | int |
| 907 | scm_valid_oport_value_p (SCM val) |
| 908 | { |
| 909 | return (SCM_NIMP (val) |
| 910 | && (SCM_OPOUTPORTP (val) |
| 911 | || (SCM_PORT_WITH_PS_P (val) |
| 912 | && SCM_OPOUTPORTP (SCM_PORT_WITH_PS_PORT (val))))); |
| 913 | } |
| 914 | |
| 915 | /* SCM_GPROC(s_write, "write", 1, 1, 0, scm_write, g_write); */ |
| 916 | |
| 917 | SCM |
| 918 | scm_write (obj, port) |
| 919 | SCM obj; |
| 920 | SCM port; |
| 921 | { |
| 922 | if (SCM_UNBNDP (port)) |
| 923 | port = scm_cur_outp; |
| 924 | |
| 925 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_write); |
| 926 | |
| 927 | scm_prin1 (obj, port, 1); |
| 928 | #ifdef HAVE_PIPE |
| 929 | # ifdef EPIPE |
| 930 | if (EPIPE == errno) |
| 931 | scm_close_port (port); |
| 932 | # endif |
| 933 | #endif |
| 934 | return SCM_UNSPECIFIED; |
| 935 | } |
| 936 | |
| 937 | |
| 938 | /* SCM_GPROC(s_display, "display", 1, 1, 0, scm_display, g_display); */ |
| 939 | |
| 940 | SCM |
| 941 | scm_display (obj, port) |
| 942 | SCM obj; |
| 943 | SCM port; |
| 944 | { |
| 945 | if (SCM_UNBNDP (port)) |
| 946 | port = scm_cur_outp; |
| 947 | |
| 948 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_display); |
| 949 | |
| 950 | scm_prin1 (obj, port, 0); |
| 951 | #ifdef HAVE_PIPE |
| 952 | # ifdef EPIPE |
| 953 | if (EPIPE == errno) |
| 954 | scm_close_port (port); |
| 955 | # endif |
| 956 | #endif |
| 957 | return SCM_UNSPECIFIED; |
| 958 | } |
| 959 | |
| 960 | SCM_PROC(s_newline, "newline", 0, 1, 0, scm_newline); |
| 961 | |
| 962 | SCM |
| 963 | scm_newline (port) |
| 964 | SCM port; |
| 965 | { |
| 966 | if (SCM_UNBNDP (port)) |
| 967 | port = scm_cur_outp; |
| 968 | |
| 969 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG1, s_newline); |
| 970 | |
| 971 | scm_putc ('\n', SCM_COERCE_OUTPORT (port)); |
| 972 | return SCM_UNSPECIFIED; |
| 973 | } |
| 974 | |
| 975 | SCM_PROC(s_write_char, "write-char", 1, 1, 0, scm_write_char); |
| 976 | |
| 977 | SCM |
| 978 | scm_write_char (chr, port) |
| 979 | SCM chr; |
| 980 | SCM port; |
| 981 | { |
| 982 | if (SCM_UNBNDP (port)) |
| 983 | port = scm_cur_outp; |
| 984 | |
| 985 | SCM_ASSERT (scm_valid_oport_value_p (port), port, SCM_ARG2, s_write_char); |
| 986 | |
| 987 | SCM_ASSERT (SCM_ICHRP (chr), chr, SCM_ARG1, s_write_char); |
| 988 | scm_putc ((int) SCM_ICHR (chr), SCM_COERCE_OUTPORT (port)); |
| 989 | #ifdef HAVE_PIPE |
| 990 | # ifdef EPIPE |
| 991 | if (EPIPE == errno) |
| 992 | scm_close_port (port); |
| 993 | # endif |
| 994 | #endif |
| 995 | return SCM_UNSPECIFIED; |
| 996 | } |
| 997 | |
| 998 | \f |
| 999 | |
| 1000 | /* Call back to Scheme code to do the printing of special objects |
| 1001 | * (like structs). SCM_PRINTER_APPLY applies PROC to EXP and a smob |
| 1002 | * containing PORT and PSTATE. This object can be used as the port for |
| 1003 | * display/write etc to continue the current print chain. The REVEALED |
| 1004 | * field of PSTATE is set to true to indicate that the print state has |
| 1005 | * escaped to Scheme and thus has to be freed by the GC. |
| 1006 | */ |
| 1007 | |
| 1008 | long scm_tc16_port_with_ps; |
| 1009 | |
| 1010 | /* Print exactly as the port itself would */ |
| 1011 | |
| 1012 | static int |
| 1013 | print_port_with_ps (SCM obj, SCM port, scm_print_state *pstate) |
| 1014 | { |
| 1015 | obj = SCM_PORT_WITH_PS_PORT (obj); |
| 1016 | return scm_ptobs[SCM_PTOBNUM (obj)].print (obj, port, pstate); |
| 1017 | } |
| 1018 | |
| 1019 | SCM |
| 1020 | scm_printer_apply (proc, exp, port, pstate) |
| 1021 | SCM proc, exp, port; |
| 1022 | scm_print_state *pstate; |
| 1023 | { |
| 1024 | SCM pwps; |
| 1025 | SCM pair = scm_cons (port, pstate->handle); |
| 1026 | SCM_NEWSMOB (pwps, scm_tc16_port_with_ps, pair); |
| 1027 | pstate->revealed = 1; |
| 1028 | return scm_apply (proc, exp, scm_cons (pwps, scm_listofnull)); |
| 1029 | } |
| 1030 | |
| 1031 | SCM_PROC (s_port_with_print_state, "port-with-print-state", 2, 0, 0, scm_port_with_print_state); |
| 1032 | |
| 1033 | SCM |
| 1034 | scm_port_with_print_state (SCM port, SCM pstate) |
| 1035 | { |
| 1036 | SCM pwps; |
| 1037 | SCM_ASSERT (scm_valid_oport_value_p (port), |
| 1038 | port, SCM_ARG1, s_port_with_print_state); |
| 1039 | SCM_ASSERT (SCM_NIMP (pstate) && SCM_PRINT_STATE_P (pstate), |
| 1040 | pstate, SCM_ARG2, s_port_with_print_state); |
| 1041 | port = SCM_COERCE_OUTPORT (port); |
| 1042 | SCM_NEWSMOB (pwps, scm_tc16_port_with_ps, scm_cons (port, pstate)); |
| 1043 | return pwps; |
| 1044 | } |
| 1045 | |
| 1046 | SCM_PROC (s_get_print_state, "get-print-state", 1, 0, 0, scm_get_print_state); |
| 1047 | |
| 1048 | SCM |
| 1049 | scm_get_print_state (SCM port) |
| 1050 | { |
| 1051 | if (SCM_NIMP (port)) |
| 1052 | { |
| 1053 | if (SCM_PORT_WITH_PS_P (port)) |
| 1054 | return SCM_PORT_WITH_PS_PS (port); |
| 1055 | if (SCM_OUTPORTP (port)) |
| 1056 | return SCM_BOOL_F; |
| 1057 | } |
| 1058 | return scm_wta (port, (char *) SCM_ARG1, s_get_print_state); |
| 1059 | } |
| 1060 | |
| 1061 | \f |
| 1062 | |
| 1063 | void |
| 1064 | scm_init_print () |
| 1065 | { |
| 1066 | SCM vtable, layout, type; |
| 1067 | |
| 1068 | scm_init_opts (scm_print_options, scm_print_opts, SCM_N_PRINT_OPTIONS); |
| 1069 | vtable = scm_make_vtable_vtable (scm_make_struct_layout (scm_nullstr), |
| 1070 | SCM_INUM0, |
| 1071 | SCM_EOL); |
| 1072 | layout = scm_make_struct_layout (scm_makfrom0str (SCM_PRINT_STATE_LAYOUT)); |
| 1073 | type = scm_make_struct (vtable, SCM_INUM0, SCM_LIST1 (layout)); |
| 1074 | scm_set_struct_vtable_name_x (type, SCM_CAR (scm_intern0 ("print-state"))); |
| 1075 | print_state_pool = scm_permanent_object (scm_cons (type, SCM_EOL)); |
| 1076 | |
| 1077 | scm_print_state_vtable = type; |
| 1078 | |
| 1079 | /* Don't want to bind a wrapper class in GOOPS, so pass 0 as arg1. */ |
| 1080 | scm_tc16_port_with_ps = scm_make_smob_type (0, 0); |
| 1081 | scm_set_smob_mark (scm_tc16_port_with_ps, scm_markcdr); |
| 1082 | scm_set_smob_print (scm_tc16_port_with_ps, print_port_with_ps); |
| 1083 | |
| 1084 | #include "print.x" |
| 1085 | } |