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   1 /*
   2  * Copyright © 2016 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  */
  14
  15 #include "ao_scheme.h"
  16 #include <limits.h>
  17 #include <math.h>
  18
  19 static int
  20 builtin_size(void *addr)
  21 {
  22         (void) addr;
  23         return sizeof (struct ao_scheme_builtin);
  24 }
  25
  26 static void
  27 builtin_mark(void *addr)
  28 {
  29         (void) addr;
  30 }
  31
  32 static void
  33 builtin_move(void *addr)
  34 {
  35         (void) addr;
  36 }
  37
  38 const struct ao_scheme_type ao_scheme_builtin_type = {
  39         .size = builtin_size,
  40         .mark = builtin_mark,
  41         .move = builtin_move
  42 };
  43
  44 #ifdef AO_SCHEME_MAKE_CONST
  45
  46 #define AO_SCHEME_BUILTIN_CASENAME
  47 #include "ao_scheme_builtin.h"
  48
  49 char *ao_scheme_args_name(uint8_t args) {
  50         args &= AO_SCHEME_FUNC_MASK;
  51         switch (args) {
  52         case AO_SCHEME_FUNC_LAMBDA: return ao_scheme_poly_atom(_ao_scheme_atom_lambda)->name;
  53         case AO_SCHEME_FUNC_NLAMBDA: return ao_scheme_poly_atom(_ao_scheme_atom_nlambda)->name;
  54         case AO_SCHEME_FUNC_MACRO: return ao_scheme_poly_atom(_ao_scheme_atom_macro)->name;
  55         default: return "???";
  56         }
  57 }
  58 #else
  59
  60 #define AO_SCHEME_BUILTIN_ARRAYNAME
  61 #include "ao_scheme_builtin.h"
  62
  63 static char *
  64 ao_scheme_builtin_name(enum ao_scheme_builtin_id b) {
  65         if (b < _builtin_last)
  66                 return ao_scheme_poly_atom(builtin_names[b])->name;
  67         return "???";
  68 }
  69
  70 static const ao_poly ao_scheme_args_atoms[] = {
  71         [AO_SCHEME_FUNC_LAMBDA] = _ao_scheme_atom_lambda,
  72         [AO_SCHEME_FUNC_NLAMBDA] = _ao_scheme_atom_nlambda,
  73         [AO_SCHEME_FUNC_MACRO] = _ao_scheme_atom_macro,
  74 };
  75
  76 char *
  77 ao_scheme_args_name(uint8_t args)
  78 {
  79         args &= AO_SCHEME_FUNC_MASK;
  80         if (args < sizeof ao_scheme_args_atoms / sizeof ao_scheme_args_atoms[0])
  81                 return ao_scheme_poly_atom(ao_scheme_args_atoms[args])->name;
  82         return "(unknown)";
  83 }
  84 #endif
  85
  86 void
  87 ao_scheme_builtin_write(ao_poly b)
  88 {
  89         struct ao_scheme_builtin *builtin = ao_scheme_poly_builtin(b);
  90         printf("%s", ao_scheme_builtin_name(builtin->func));
  91 }
  92
  93 ao_poly
  94 ao_scheme_check_argc(ao_poly name, struct ao_scheme_cons *cons, int min, int max)
  95 {
  96         int     argc = 0;
  97
  98         while (cons && argc <= max) {
  99                 argc++;
 100                 cons = ao_scheme_cons_cdr(cons);
 101         }
 102         if (argc < min || argc > max)
 103                 return ao_scheme_error(AO_SCHEME_INVALID, "%s: invalid arg count", ao_scheme_poly_atom(name)->name);
 104         return _ao_scheme_bool_true;
 105 }
 106
 107 ao_poly
 108 ao_scheme_arg(struct ao_scheme_cons *cons, int argc)
 109 {
 110         if (!cons)
 111                 return AO_SCHEME_NIL;
 112         while (argc--) {
 113                 if (!cons)
 114                         return AO_SCHEME_NIL;
 115                 cons = ao_scheme_cons_cdr(cons);
 116         }
 117         return cons->car;
 118 }
 119
 120 ao_poly
 121 ao_scheme_check_argt(ao_poly name, struct ao_scheme_cons *cons, int argc, int type, int nil_ok)
 122 {
 123         ao_poly car = ao_scheme_arg(cons, argc);
 124
 125         if ((!car && !nil_ok) || ao_scheme_poly_type(car) != type)
 126                 return ao_scheme_error(AO_SCHEME_INVALID, "%v: arg %d invalid type %v", name, argc, car);
 127         return _ao_scheme_bool_true;
 128 }
 129
 130 int32_t
 131 ao_scheme_arg_int(ao_poly name, struct ao_scheme_cons *cons, int argc)
 132 {
 133         ao_poly p = ao_scheme_arg(cons, argc);
 134         int32_t i = ao_scheme_poly_integer(p);
 135
 136         if (i == AO_SCHEME_NOT_INTEGER)
 137                 (void) ao_scheme_error(AO_SCHEME_INVALID, "%v: arg %d invalid type %v", name, argc, p);
 138         return i;
 139 }
 140
 141 ao_poly
 142 ao_scheme_do_car(struct ao_scheme_cons *cons)
 143 {
 144         if (!ao_scheme_check_argc(_ao_scheme_atom_car, cons, 1, 1))
 145                 return AO_SCHEME_NIL;
 146         if (!ao_scheme_check_argt(_ao_scheme_atom_car, cons, 0, AO_SCHEME_CONS, 0))
 147                 return AO_SCHEME_NIL;
 148         return ao_scheme_poly_cons(cons->car)->car;
 149 }
 150
 151 ao_poly
 152 ao_scheme_do_cdr(struct ao_scheme_cons *cons)
 153 {
 154         if (!ao_scheme_check_argc(_ao_scheme_atom_cdr, cons, 1, 1))
 155                 return AO_SCHEME_NIL;
 156         if (!ao_scheme_check_argt(_ao_scheme_atom_cdr, cons, 0, AO_SCHEME_CONS, 0))
 157                 return AO_SCHEME_NIL;
 158         return ao_scheme_poly_cons(cons->car)->cdr;
 159 }
 160
 161 ao_poly
 162 ao_scheme_do_cons(struct ao_scheme_cons *cons)
 163 {
 164         ao_poly car, cdr;
 165         if(!ao_scheme_check_argc(_ao_scheme_atom_cons, cons, 2, 2))
 166                 return AO_SCHEME_NIL;
 167         car = ao_scheme_arg(cons, 0);
 168         cdr = ao_scheme_arg(cons, 1);
 169         return ao_scheme__cons(car, cdr);
 170 }
 171
 172 ao_poly
 173 ao_scheme_do_last(struct ao_scheme_cons *cons)
 174 {
 175         struct ao_scheme_cons   *list;
 176         if (!ao_scheme_check_argc(_ao_scheme_atom_last, cons, 1, 1))
 177                 return AO_SCHEME_NIL;
 178         if (!ao_scheme_check_argt(_ao_scheme_atom_last, cons, 0, AO_SCHEME_CONS, 1))
 179                 return AO_SCHEME_NIL;
 180         for (list = ao_scheme_poly_cons(ao_scheme_arg(cons, 0));
 181              list;
 182              list = ao_scheme_cons_cdr(list))
 183         {
 184                 if (!list->cdr)
 185                         return list->car;
 186         }
 187         return AO_SCHEME_NIL;
 188 }
 189
 190 ao_poly
 191 ao_scheme_do_length(struct ao_scheme_cons *cons)
 192 {
 193         if (!ao_scheme_check_argc(_ao_scheme_atom_length, cons, 1, 1))
 194                 return AO_SCHEME_NIL;
 195         if (!ao_scheme_check_argt(_ao_scheme_atom_length, cons, 0, AO_SCHEME_CONS, 1))
 196                 return AO_SCHEME_NIL;
 197         return ao_scheme_int_poly(ao_scheme_cons_length(ao_scheme_poly_cons(ao_scheme_arg(cons, 0))));
 198 }
 199
 200 ao_poly
 201 ao_scheme_do_list_copy(struct ao_scheme_cons *cons)
 202 {
 203         struct ao_scheme_cons *new;
 204
 205         if (!ao_scheme_check_argc(_ao_scheme_atom_length, cons, 1, 1))
 206                 return AO_SCHEME_NIL;
 207         if (!ao_scheme_check_argt(_ao_scheme_atom_length, cons, 0, AO_SCHEME_CONS, 1))
 208                 return AO_SCHEME_NIL;
 209         new = ao_scheme_cons_copy(ao_scheme_poly_cons(ao_scheme_arg(cons, 0)));
 210         return ao_scheme_cons_poly(new);
 211 }
 212
 213 ao_poly
 214 ao_scheme_do_quote(struct ao_scheme_cons *cons)
 215 {
 216         if (!ao_scheme_check_argc(_ao_scheme_atom_quote, cons, 1, 1))
 217                 return AO_SCHEME_NIL;
 218         return ao_scheme_arg(cons, 0);
 219 }
 220
 221 ao_poly
 222 ao_scheme_do_set(struct ao_scheme_cons *cons)
 223 {
 224         if (!ao_scheme_check_argc(_ao_scheme_atom_set, cons, 2, 2))
 225                 return AO_SCHEME_NIL;
 226         if (!ao_scheme_check_argt(_ao_scheme_atom_set, cons, 0, AO_SCHEME_ATOM, 0))
 227                 return AO_SCHEME_NIL;
 228
 229         return ao_scheme_atom_set(ao_scheme_arg(cons, 0), ao_scheme_arg(cons, 1));
 230 }
 231
 232 ao_poly
 233 ao_scheme_do_def(struct ao_scheme_cons *cons)
 234 {
 235         if (!ao_scheme_check_argc(_ao_scheme_atom_def, cons, 2, 2))
 236                 return AO_SCHEME_NIL;
 237         if (!ao_scheme_check_argt(_ao_scheme_atom_def, cons, 0, AO_SCHEME_ATOM, 0))
 238                 return AO_SCHEME_NIL;
 239
 240         return ao_scheme_atom_def(ao_scheme_arg(cons, 0), ao_scheme_arg(cons, 1));
 241 }
 242
 243 ao_poly
 244 ao_scheme_do_setq(struct ao_scheme_cons *cons)
 245 {
 246         ao_poly name;
 247         if (!ao_scheme_check_argc(_ao_scheme_atom_set21, cons, 2, 2))
 248                 return AO_SCHEME_NIL;
 249         name = cons->car;
 250         if (ao_scheme_poly_type(name) != AO_SCHEME_ATOM)
 251                 return ao_scheme_error(AO_SCHEME_INVALID, "set! of non-atom %v", name);
 252         if (!ao_scheme_atom_ref(name, NULL))
 253                 return ao_scheme_error(AO_SCHEME_INVALID, "atom %v not defined", name);
 254         return ao_scheme__cons(_ao_scheme_atom_set,
 255                              ao_scheme__cons(ao_scheme__cons(_ao_scheme_atom_quote,
 256                                                          ao_scheme__cons(name, AO_SCHEME_NIL)),
 257                                            cons->cdr));
 258 }
 259
 260 ao_poly
 261 ao_scheme_do_cond(struct ao_scheme_cons *cons)
 262 {
 263         ao_scheme_set_cond(cons);
 264         return AO_SCHEME_NIL;
 265 }
 266
 267 ao_poly
 268 ao_scheme_do_begin(struct ao_scheme_cons *cons)
 269 {
 270         ao_scheme_stack->state = eval_begin;
 271         ao_scheme_stack->sexprs = ao_scheme_cons_poly(cons);
 272         return AO_SCHEME_NIL;
 273 }
 274
 275 ao_poly
 276 ao_scheme_do_while(struct ao_scheme_cons *cons)
 277 {
 278         ao_scheme_stack->state = eval_while;
 279         ao_scheme_stack->sexprs = ao_scheme_cons_poly(cons);
 280         return AO_SCHEME_NIL;
 281 }
 282
 283 ao_poly
 284 ao_scheme_do_write(struct ao_scheme_cons *cons)
 285 {
 286         ao_poly val = AO_SCHEME_NIL;
 287         while (cons) {
 288                 val = cons->car;
 289                 ao_scheme_poly_write(val);
 290                 cons = ao_scheme_cons_cdr(cons);
 291                 if (cons)
 292                         printf(" ");
 293         }
 294         return _ao_scheme_bool_true;
 295 }
 296
 297 ao_poly
 298 ao_scheme_do_display(struct ao_scheme_cons *cons)
 299 {
 300         ao_poly val = AO_SCHEME_NIL;
 301         while (cons) {
 302                 val = cons->car;
 303                 ao_scheme_poly_display(val);
 304                 cons = ao_scheme_cons_cdr(cons);
 305         }
 306         return _ao_scheme_bool_true;
 307 }
 308
 309 ao_poly
 310 ao_scheme_math(struct ao_scheme_cons *orig_cons, enum ao_scheme_builtin_id op)
 311 {
 312         struct ao_scheme_cons *cons = cons;
 313         ao_poly ret = AO_SCHEME_NIL;
 314
 315         for (cons = orig_cons; cons; cons = ao_scheme_cons_cdr(cons)) {
 316                 ao_poly         car = cons->car;
 317                 uint8_t         rt = ao_scheme_poly_type(ret);
 318                 uint8_t         ct = ao_scheme_poly_type(car);
 319
 320                 if (cons == orig_cons) {
 321                         ret = car;
 322                         if (cons->cdr == AO_SCHEME_NIL) {
 323                                 switch (op) {
 324                                 case builtin_minus:
 325                                         if (ao_scheme_integer_typep(ct))
 326                                                 ret = ao_scheme_integer_poly(-ao_scheme_poly_integer(ret));
 327                                         else if (ct == AO_SCHEME_FLOAT)
 328                                                 ret = ao_scheme_float_get(-ao_scheme_poly_number(ret));
 329                                         break;
 330                                 case builtin_divide:
 331                                         if (ao_scheme_integer_typep(ct) && ao_scheme_poly_integer(ret) == 1)
 332                                                 ;
 333                                         else if (ao_scheme_number_typep(ct)) {
 334                                                 float   v = ao_scheme_poly_number(ret);
 335                                                 ret = ao_scheme_float_get(1/v);
 336                                         }
 337                                         break;
 338                                 default:
 339                                         break;
 340                                 }
 341                         }
 342                 } else if (ao_scheme_integer_typep(rt) && ao_scheme_integer_typep(ct)) {
 343                         int32_t r = ao_scheme_poly_integer(ret);
 344                         int32_t c = ao_scheme_poly_integer(car);
 345                         int64_t t;
 346
 347                         switch(op) {
 348                         case builtin_plus:
 349                                 r += c;
 350                         check_overflow:
 351                                 if (r < AO_SCHEME_MIN_BIGINT || AO_SCHEME_MAX_BIGINT < r)
 352                                         goto inexact;
 353                                 break;
 354                         case builtin_minus:
 355                                 r -= c;
 356                                 goto check_overflow;
 357                                 break;
 358                         case builtin_times:
 359                                 t = (int64_t) r * (int64_t) c;
 360                                 if (t < AO_SCHEME_MIN_BIGINT || AO_SCHEME_MAX_BIGINT < t)
 361                                         goto inexact;
 362                                 r = (int32_t) t;
 363                                 break;
 364                         case builtin_divide:
 365                                 if (c != 0 && (r % c) == 0)
 366                                         r /= c;
 367                                 else
 368                                         goto inexact;
 369                                 break;
 370                         case builtin_quotient:
 371                                 if (c == 0)
 372                                         return ao_scheme_error(AO_SCHEME_DIVIDE_BY_ZERO, "quotient by zero");
 373                                 if (r % c != 0 && (c < 0) != (r < 0))
 374                                         r = r / c - 1;
 375                                 else
 376                                         r = r / c;
 377                                 break;
 378                         case builtin_remainder:
 379                                 if (c == 0)
 380                                         return ao_scheme_error(AO_SCHEME_DIVIDE_BY_ZERO, "remainder by zero");
 381                                 r %= c;
 382                                 break;
 383                         case builtin_modulo:
 384                                 if (c == 0)
 385                                         return ao_scheme_error(AO_SCHEME_DIVIDE_BY_ZERO, "modulo by zero");
 386                                 r %= c;
 387                                 if ((r < 0) != (c < 0))
 388                                         r += c;
 389                                 break;
 390                         default:
 391                                 break;
 392                         }
 393                         ret = ao_scheme_integer_poly(r);
 394                 } else if (ao_scheme_number_typep(rt) && ao_scheme_number_typep(ct)) {
 395                         float r, c;
 396                 inexact:
 397                         r = ao_scheme_poly_number(ret);
 398                         c = ao_scheme_poly_number(car);
 399                         switch(op) {
 400                         case builtin_plus:
 401                                 r += c;
 402                                 break;
 403                         case builtin_minus:
 404                                 r -= c;
 405                                 break;
 406                         case builtin_times:
 407                                 r *= c;
 408                                 break;
 409                         case builtin_divide:
 410                                 r /= c;
 411                                 break;
 412                         case builtin_quotient:
 413                         case builtin_remainder:
 414                         case builtin_modulo:
 415                                 return ao_scheme_error(AO_SCHEME_INVALID, "non-integer value in integer divide");
 416                         default:
 417                                 break;
 418                         }
 419                         ret = ao_scheme_float_get(r);
 420                 }
 421
 422                 else if (rt == AO_SCHEME_STRING && ct == AO_SCHEME_STRING && op == builtin_plus)
 423                         ret = ao_scheme_string_poly(ao_scheme_string_cat(ao_scheme_poly_string(ret),
 424                                                                      ao_scheme_poly_string(car)));
 425                 else
 426                         return ao_scheme_error(AO_SCHEME_INVALID, "invalid args");
 427         }
 428         return ret;
 429 }
 430
 431 ao_poly
 432 ao_scheme_do_plus(struct ao_scheme_cons *cons)
 433 {
 434         return ao_scheme_math(cons, builtin_plus);
 435 }
 436
 437 ao_poly
 438 ao_scheme_do_minus(struct ao_scheme_cons *cons)
 439 {
 440         return ao_scheme_math(cons, builtin_minus);
 441 }
 442
 443 ao_poly
 444 ao_scheme_do_times(struct ao_scheme_cons *cons)
 445 {
 446         return ao_scheme_math(cons, builtin_times);
 447 }
 448
 449 ao_poly
 450 ao_scheme_do_divide(struct ao_scheme_cons *cons)
 451 {
 452         return ao_scheme_math(cons, builtin_divide);
 453 }
 454
 455 ao_poly
 456 ao_scheme_do_quotient(struct ao_scheme_cons *cons)
 457 {
 458         return ao_scheme_math(cons, builtin_quotient);
 459 }
 460
 461 ao_poly
 462 ao_scheme_do_modulo(struct ao_scheme_cons *cons)
 463 {
 464         return ao_scheme_math(cons, builtin_modulo);
 465 }
 466
 467 ao_poly
 468 ao_scheme_do_remainder(struct ao_scheme_cons *cons)
 469 {
 470         return ao_scheme_math(cons, builtin_remainder);
 471 }
 472
 473 ao_poly
 474 ao_scheme_compare(struct ao_scheme_cons *cons, enum ao_scheme_builtin_id op)
 475 {
 476         ao_poly left;
 477
 478         if (!cons)
 479                 return _ao_scheme_bool_true;
 480
 481         left = cons->car;
 482         for (cons = ao_scheme_cons_cdr(cons); cons; cons = ao_scheme_cons_cdr(cons)) {
 483                 ao_poly right = cons->car;
 484
 485                 if (op == builtin_equal) {
 486                         if (left != right)
 487                                 return _ao_scheme_bool_false;
 488                 } else {
 489                         uint8_t lt = ao_scheme_poly_type(left);
 490                         uint8_t rt = ao_scheme_poly_type(right);
 491                         if (ao_scheme_integer_typep(lt) && ao_scheme_integer_typep(rt)) {
 492                                 int32_t l = ao_scheme_poly_integer(left);
 493                                 int32_t r = ao_scheme_poly_integer(right);
 494
 495                                 switch (op) {
 496                                 case builtin_less:
 497                                         if (!(l < r))
 498                                                 return _ao_scheme_bool_false;
 499                                         break;
 500                                 case builtin_greater:
 501                                         if (!(l > r))
 502                                                 return _ao_scheme_bool_false;
 503                                         break;
 504                                 case builtin_less_equal:
 505                                         if (!(l <= r))
 506                                                 return _ao_scheme_bool_false;
 507                                         break;
 508                                 case builtin_greater_equal:
 509                                         if (!(l >= r))
 510                                                 return _ao_scheme_bool_false;
 511                                         break;
 512                                 default:
 513                                         break;
 514                                 }
 515                         } else if (lt == AO_SCHEME_STRING && rt == AO_SCHEME_STRING) {
 516                                 int c = strcmp(ao_scheme_poly_string(left),
 517                                                ao_scheme_poly_string(right));
 518                                 switch (op) {
 519                                 case builtin_less:
 520                                         if (!(c < 0))
 521                                                 return _ao_scheme_bool_false;
 522                                         break;
 523                                 case builtin_greater:
 524                                         if (!(c > 0))
 525                                                 return _ao_scheme_bool_false;
 526                                         break;
 527                                 case builtin_less_equal:
 528                                         if (!(c <= 0))
 529                                                 return _ao_scheme_bool_false;
 530                                         break;
 531                                 case builtin_greater_equal:
 532                                         if (!(c >= 0))
 533                                                 return _ao_scheme_bool_false;
 534                                         break;
 535                                 default:
 536                                         break;
 537                                 }
 538                         }
 539                 }
 540                 left = right;
 541         }
 542         return _ao_scheme_bool_true;
 543 }
 544
 545 ao_poly
 546 ao_scheme_do_equal(struct ao_scheme_cons *cons)
 547 {
 548         return ao_scheme_compare(cons, builtin_equal);
 549 }
 550
 551 ao_poly
 552 ao_scheme_do_less(struct ao_scheme_cons *cons)
 553 {
 554         return ao_scheme_compare(cons, builtin_less);
 555 }
 556
 557 ao_poly
 558 ao_scheme_do_greater(struct ao_scheme_cons *cons)
 559 {
 560         return ao_scheme_compare(cons, builtin_greater);
 561 }
 562
 563 ao_poly
 564 ao_scheme_do_less_equal(struct ao_scheme_cons *cons)
 565 {
 566         return ao_scheme_compare(cons, builtin_less_equal);
 567 }
 568
 569 ao_poly
 570 ao_scheme_do_greater_equal(struct ao_scheme_cons *cons)
 571 {
 572         return ao_scheme_compare(cons, builtin_greater_equal);
 573 }
 574
 575 ao_poly
 576 ao_scheme_do_list_to_string(struct ao_scheme_cons *cons)
 577 {
 578         if (!ao_scheme_check_argc(_ao_scheme_atom_list2d3estring, cons, 1, 1))
 579                 return AO_SCHEME_NIL;
 580         if (!ao_scheme_check_argt(_ao_scheme_atom_list2d3estring, cons, 0, AO_SCHEME_CONS, 1))
 581                 return AO_SCHEME_NIL;
 582         return ao_scheme_string_pack(ao_scheme_poly_cons(ao_scheme_arg(cons, 0)));
 583 }
 584
 585 ao_poly
 586 ao_scheme_do_string_to_list(struct ao_scheme_cons *cons)
 587 {
 588         if (!ao_scheme_check_argc(_ao_scheme_atom_string2d3elist, cons, 1, 1))
 589                 return AO_SCHEME_NIL;
 590         if (!ao_scheme_check_argt(_ao_scheme_atom_string2d3elist, cons, 0, AO_SCHEME_STRING, 0))
 591                 return AO_SCHEME_NIL;
 592         return ao_scheme_string_unpack(ao_scheme_poly_string(ao_scheme_arg(cons, 0)));
 593 }
 594
 595 ao_poly
 596 ao_scheme_do_string_ref(struct ao_scheme_cons *cons)
 597 {
 598         char *string;
 599         int32_t ref;
 600         if (!ao_scheme_check_argc(_ao_scheme_atom_string2dref, cons, 2, 2))
 601                 return AO_SCHEME_NIL;
 602         if (!ao_scheme_check_argt(_ao_scheme_atom_string2dref, cons, 0, AO_SCHEME_STRING, 0))
 603                 return AO_SCHEME_NIL;
 604         ref = ao_scheme_arg_int(_ao_scheme_atom_string2dref, cons, 1);
 605         if (ref == AO_SCHEME_NOT_INTEGER)
 606                 return AO_SCHEME_NIL;
 607         string = ao_scheme_poly_string(ao_scheme_arg(cons, 0));
 608         while (*string && ref) {
 609                 ++string;
 610                 --ref;
 611         }
 612         if (!*string)
 613                 return ao_scheme_error(AO_SCHEME_INVALID, "%v: string %v ref %v invalid",
 614                                        _ao_scheme_atom_string2dref,
 615                                        ao_scheme_arg(cons, 0),
 616                                        ao_scheme_arg(cons, 1));
 617         return ao_scheme_int_poly(*string);
 618 }
 619
 620 ao_poly
 621 ao_scheme_do_string_length(struct ao_scheme_cons *cons)
 622 {
 623         char *string;
 624
 625         if (!ao_scheme_check_argc(_ao_scheme_atom_string2dlength, cons, 1, 1))
 626                 return AO_SCHEME_NIL;
 627         if (!ao_scheme_check_argt(_ao_scheme_atom_string2dlength, cons, 0, AO_SCHEME_STRING, 0))
 628                 return AO_SCHEME_NIL;
 629         string = ao_scheme_poly_string(ao_scheme_arg(cons, 0));
 630         return ao_scheme_integer_poly(strlen(string));
 631 }
 632
 633 ao_poly
 634 ao_scheme_do_string_copy(struct ao_scheme_cons *cons)
 635 {
 636         char *string;
 637
 638         if (!ao_scheme_check_argc(_ao_scheme_atom_string2dcopy, cons, 1, 1))
 639                 return AO_SCHEME_NIL;
 640         if (!ao_scheme_check_argt(_ao_scheme_atom_string2dcopy, cons, 0, AO_SCHEME_STRING, 0))
 641                 return AO_SCHEME_NIL;
 642         string = ao_scheme_poly_string(ao_scheme_arg(cons, 0));
 643         return ao_scheme_string_poly(ao_scheme_string_copy(string));
 644 }
 645
 646 ao_poly
 647 ao_scheme_do_string_set(struct ao_scheme_cons *cons)
 648 {
 649         char *string;
 650         int32_t ref;
 651         int32_t val;
 652
 653         if (!ao_scheme_check_argc(_ao_scheme_atom_string2dset21, cons, 3, 3))
 654                 return AO_SCHEME_NIL;
 655         if (!ao_scheme_check_argt(_ao_scheme_atom_string2dset21, cons, 0, AO_SCHEME_STRING, 0))
 656                 return AO_SCHEME_NIL;
 657         string = ao_scheme_poly_string(ao_scheme_arg(cons, 0));
 658         ref = ao_scheme_arg_int(_ao_scheme_atom_string2dset21, cons, 1);
 659         if (ref == AO_SCHEME_NOT_INTEGER)
 660                 return AO_SCHEME_NIL;
 661         val = ao_scheme_arg_int(_ao_scheme_atom_string2dset21, cons, 2);
 662         if (val == AO_SCHEME_NOT_INTEGER)
 663                 return AO_SCHEME_NIL;
 664         while (*string && ref) {
 665                 ++string;
 666                 --ref;
 667         }
 668         if (!*string)
 669                 return ao_scheme_error(AO_SCHEME_INVALID, "%v: string %v ref %v invalid",
 670                                        _ao_scheme_atom_string2dset21,
 671                                        ao_scheme_arg(cons, 0),
 672                                        ao_scheme_arg(cons, 1));
 673         *string = val;
 674         return ao_scheme_int_poly(*string);
 675 }
 676
 677 ao_poly
 678 ao_scheme_do_flush_output(struct ao_scheme_cons *cons)
 679 {
 680         if (!ao_scheme_check_argc(_ao_scheme_atom_flush2doutput, cons, 0, 0))
 681                 return AO_SCHEME_NIL;
 682         ao_scheme_os_flush();
 683         return _ao_scheme_bool_true;
 684 }
 685
 686 ao_poly
 687 ao_scheme_do_led(struct ao_scheme_cons *cons)
 688 {
 689         int32_t led;
 690         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1))
 691                 return AO_SCHEME_NIL;
 692         led = ao_scheme_arg_int(_ao_scheme_atom_led, cons, 0);
 693         if (led == AO_SCHEME_NOT_INTEGER)
 694                 return AO_SCHEME_NIL;
 695         led = ao_scheme_arg(cons, 0);
 696         ao_scheme_os_led(ao_scheme_poly_int(led));
 697         return led;
 698 }
 699
 700 ao_poly
 701 ao_scheme_do_delay(struct ao_scheme_cons *cons)
 702 {
 703         int32_t delay;
 704
 705         if (!ao_scheme_check_argc(_ao_scheme_atom_delay, cons, 1, 1))
 706                 return AO_SCHEME_NIL;
 707         delay = ao_scheme_arg_int(_ao_scheme_atom_delay, cons, 0);
 708         if (delay == AO_SCHEME_NOT_INTEGER)
 709                 return AO_SCHEME_NIL;
 710         ao_scheme_os_delay(delay);
 711         return delay;
 712 }
 713
 714 ao_poly
 715 ao_scheme_do_eval(struct ao_scheme_cons *cons)
 716 {
 717         if (!ao_scheme_check_argc(_ao_scheme_atom_eval, cons, 1, 1))
 718                 return AO_SCHEME_NIL;
 719         ao_scheme_stack->state = eval_sexpr;
 720         return cons->car;
 721 }
 722
 723 ao_poly
 724 ao_scheme_do_apply(struct ao_scheme_cons *cons)
 725 {
 726         if (!ao_scheme_check_argc(_ao_scheme_atom_apply, cons, 2, INT_MAX))
 727                 return AO_SCHEME_NIL;
 728         ao_scheme_stack->state = eval_apply;
 729         return ao_scheme_cons_poly(cons);
 730 }
 731
 732 ao_poly
 733 ao_scheme_do_read(struct ao_scheme_cons *cons)
 734 {
 735         if (!ao_scheme_check_argc(_ao_scheme_atom_read, cons, 0, 0))
 736                 return AO_SCHEME_NIL;
 737         return ao_scheme_read();
 738 }
 739
 740 ao_poly
 741 ao_scheme_do_collect(struct ao_scheme_cons *cons)
 742 {
 743         int     free;
 744         (void) cons;
 745         free = ao_scheme_collect(AO_SCHEME_COLLECT_FULL);
 746         return ao_scheme_integer_poly(free);
 747 }
 748
 749 ao_poly
 750 ao_scheme_do_nullp(struct ao_scheme_cons *cons)
 751 {
 752         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1))
 753                 return AO_SCHEME_NIL;
 754         if (ao_scheme_arg(cons, 0) == AO_SCHEME_NIL)
 755                 return _ao_scheme_bool_true;
 756         else
 757                 return _ao_scheme_bool_false;
 758 }
 759
 760 ao_poly
 761 ao_scheme_do_not(struct ao_scheme_cons *cons)
 762 {
 763         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1))
 764                 return AO_SCHEME_NIL;
 765         if (ao_scheme_arg(cons, 0) == _ao_scheme_bool_false)
 766                 return _ao_scheme_bool_true;
 767         else
 768                 return _ao_scheme_bool_false;
 769 }
 770
 771 static ao_poly
 772 ao_scheme_do_typep(int type, struct ao_scheme_cons *cons)
 773 {
 774         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1))
 775                 return AO_SCHEME_NIL;
 776         if (ao_scheme_poly_type(ao_scheme_arg(cons, 0)) == type)
 777                 return _ao_scheme_bool_true;
 778         return _ao_scheme_bool_false;
 779 }
 780
 781 ao_poly
 782 ao_scheme_do_pairp(struct ao_scheme_cons *cons)
 783 {
 784         ao_poly v;
 785         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1))
 786                 return AO_SCHEME_NIL;
 787         v = ao_scheme_arg(cons, 0);
 788         if (v != AO_SCHEME_NIL && ao_scheme_poly_type(v) == AO_SCHEME_CONS)
 789                 return _ao_scheme_bool_true;
 790         return _ao_scheme_bool_false;
 791 }
 792
 793 ao_poly
 794 ao_scheme_do_integerp(struct ao_scheme_cons *cons)
 795 {
 796         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1))
 797                 return AO_SCHEME_NIL;
 798         switch (ao_scheme_poly_type(ao_scheme_arg(cons, 0))) {
 799         case AO_SCHEME_INT:
 800         case AO_SCHEME_BIGINT:
 801                 return _ao_scheme_bool_true;
 802         default:
 803                 return _ao_scheme_bool_false;
 804         }
 805 }
 806
 807 ao_poly
 808 ao_scheme_do_numberp(struct ao_scheme_cons *cons)
 809 {
 810         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1))
 811                 return AO_SCHEME_NIL;
 812         switch (ao_scheme_poly_type(ao_scheme_arg(cons, 0))) {
 813         case AO_SCHEME_INT:
 814         case AO_SCHEME_BIGINT:
 815         case AO_SCHEME_FLOAT:
 816                 return _ao_scheme_bool_true;
 817         default:
 818                 return _ao_scheme_bool_false;
 819         }
 820 }
 821
 822 ao_poly
 823 ao_scheme_do_stringp(struct ao_scheme_cons *cons)
 824 {
 825         return ao_scheme_do_typep(AO_SCHEME_STRING, cons);
 826 }
 827
 828 ao_poly
 829 ao_scheme_do_symbolp(struct ao_scheme_cons *cons)
 830 {
 831         return ao_scheme_do_typep(AO_SCHEME_ATOM, cons);
 832 }
 833
 834 ao_poly
 835 ao_scheme_do_booleanp(struct ao_scheme_cons *cons)
 836 {
 837         return ao_scheme_do_typep(AO_SCHEME_BOOL, cons);
 838 }
 839
 840 ao_poly
 841 ao_scheme_do_procedurep(struct ao_scheme_cons *cons)
 842 {
 843         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1))
 844                 return AO_SCHEME_NIL;
 845         switch (ao_scheme_poly_type(ao_scheme_arg(cons, 0))) {
 846         case AO_SCHEME_BUILTIN:
 847         case AO_SCHEME_LAMBDA:
 848                 return _ao_scheme_bool_true;
 849         default:
 850         return _ao_scheme_bool_false;
 851         }
 852 }
 853
 854 /* This one is special -- a list is either nil or
 855  * a 'proper' list with only cons cells
 856  */
 857 ao_poly
 858 ao_scheme_do_listp(struct ao_scheme_cons *cons)
 859 {
 860         ao_poly v;
 861         if (!ao_scheme_check_argc(_ao_scheme_atom_list3f, cons, 1, 1))
 862                 return AO_SCHEME_NIL;
 863         v = ao_scheme_arg(cons, 0);
 864         for (;;) {
 865                 if (v == AO_SCHEME_NIL)
 866                         return _ao_scheme_bool_true;
 867                 if (ao_scheme_poly_type(v) != AO_SCHEME_CONS)
 868                         return _ao_scheme_bool_false;
 869                 v = ao_scheme_poly_cons(v)->cdr;
 870         }
 871 }
 872
 873 ao_poly
 874 ao_scheme_do_set_car(struct ao_scheme_cons *cons)
 875 {
 876         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 2, 2))
 877                 return AO_SCHEME_NIL;
 878         if (!ao_scheme_check_argt(_ao_scheme_atom_led, cons, 0, AO_SCHEME_CONS, 0))
 879                 return AO_SCHEME_NIL;
 880         return ao_scheme_poly_cons(ao_scheme_arg(cons, 0))->car = ao_scheme_arg(cons, 1);
 881 }
 882
 883 ao_poly
 884 ao_scheme_do_set_cdr(struct ao_scheme_cons *cons)
 885 {
 886         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 2, 2))
 887                 return AO_SCHEME_NIL;
 888         if (!ao_scheme_check_argt(_ao_scheme_atom_led, cons, 0, AO_SCHEME_CONS, 0))
 889                 return AO_SCHEME_NIL;
 890         return ao_scheme_poly_cons(ao_scheme_arg(cons, 0))->cdr = ao_scheme_arg(cons, 1);
 891 }
 892
 893 ao_poly
 894 ao_scheme_do_symbol_to_string(struct ao_scheme_cons *cons)
 895 {
 896         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1))
 897                 return AO_SCHEME_NIL;
 898         if (!ao_scheme_check_argt(_ao_scheme_atom_led, cons, 0, AO_SCHEME_ATOM, 0))
 899                 return AO_SCHEME_NIL;
 900         return ao_scheme_string_poly(ao_scheme_string_copy(ao_scheme_poly_atom(ao_scheme_arg(cons, 0))->name));
 901 }
 902
 903 ao_poly
 904 ao_scheme_do_string_to_symbol(struct ao_scheme_cons *cons)
 905 {
 906         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1))
 907                 return AO_SCHEME_NIL;
 908         if (!ao_scheme_check_argt(_ao_scheme_atom_led, cons, 0, AO_SCHEME_STRING, 0))
 909                 return AO_SCHEME_NIL;
 910
 911         return ao_scheme_atom_poly(ao_scheme_atom_intern(ao_scheme_poly_string(ao_scheme_arg(cons, 0))));
 912 }
 913
 914 ao_poly
 915 ao_scheme_do_read_char(struct ao_scheme_cons *cons)
 916 {
 917         int     c;
 918         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 0, 0))
 919                 return AO_SCHEME_NIL;
 920         c = getchar();
 921         return ao_scheme_int_poly(c);
 922 }
 923
 924 ao_poly
 925 ao_scheme_do_write_char(struct ao_scheme_cons *cons)
 926 {
 927         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 1, 1))
 928                 return AO_SCHEME_NIL;
 929         if (!ao_scheme_check_argt(_ao_scheme_atom_led, cons, 0, AO_SCHEME_INT, 0))
 930                 return AO_SCHEME_NIL;
 931         putchar(ao_scheme_poly_integer(ao_scheme_arg(cons, 0)));
 932         return _ao_scheme_bool_true;
 933 }
 934
 935 ao_poly
 936 ao_scheme_do_exit(struct ao_scheme_cons *cons)
 937 {
 938         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 0, 0))
 939                 return AO_SCHEME_NIL;
 940         ao_scheme_exception |= AO_SCHEME_EXIT;
 941         return _ao_scheme_bool_true;
 942 }
 943
 944 ao_poly
 945 ao_scheme_do_current_jiffy(struct ao_scheme_cons *cons)
 946 {
 947         int     jiffy;
 948
 949         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 0, 0))
 950                 return AO_SCHEME_NIL;
 951         jiffy = ao_scheme_os_jiffy();
 952         return (ao_scheme_int_poly(jiffy));
 953 }
 954
 955 ao_poly
 956 ao_scheme_do_current_second(struct ao_scheme_cons *cons)
 957 {
 958         int     second;
 959
 960         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 0, 0))
 961                 return AO_SCHEME_NIL;
 962         second = ao_scheme_os_jiffy() / AO_SCHEME_JIFFIES_PER_SECOND;
 963         return (ao_scheme_int_poly(second));
 964 }
 965
 966 ao_poly
 967 ao_scheme_do_jiffies_per_second(struct ao_scheme_cons *cons)
 968 {
 969         if (!ao_scheme_check_argc(_ao_scheme_atom_led, cons, 0, 0))
 970                 return AO_SCHEME_NIL;
 971         return (ao_scheme_int_poly(AO_SCHEME_JIFFIES_PER_SECOND));
 972 }
 973
 974 ao_poly
 975 ao_scheme_do_vector(struct ao_scheme_cons *cons)
 976 {
 977         return ao_scheme_vector_poly(ao_scheme_list_to_vector(cons));
 978 }
 979
 980 ao_poly
 981 ao_scheme_do_make_vector(struct ao_scheme_cons *cons)
 982 {
 983         int32_t k;
 984
 985         if (!ao_scheme_check_argc(_ao_scheme_atom_make2dvector, cons, 2, 2))
 986                 return AO_SCHEME_NIL;
 987         k = ao_scheme_arg_int(_ao_scheme_atom_make2dvector, cons, 0);
 988         if (k == AO_SCHEME_NOT_INTEGER)
 989                 return AO_SCHEME_NIL;
 990         return ao_scheme_vector_poly(ao_scheme_vector_alloc(k, ao_scheme_arg(cons, 1)));
 991 }
 992
 993 ao_poly
 994 ao_scheme_do_vector_ref(struct ao_scheme_cons *cons)
 995 {
 996         if (!ao_scheme_check_argc(_ao_scheme_atom_vector2dref, cons, 2, 2))
 997                 return AO_SCHEME_NIL;
 998         if (!ao_scheme_check_argt(_ao_scheme_atom_vector2dref, cons, 0, AO_SCHEME_VECTOR, 0))
 999                 return AO_SCHEME_NIL;
1000         return ao_scheme_vector_get(ao_scheme_arg(cons, 0), ao_scheme_arg(cons, 1));
1001 }
1002
1003 ao_poly
1004 ao_scheme_do_vector_set(struct ao_scheme_cons *cons)
1005 {
1006         if (!ao_scheme_check_argc(_ao_scheme_atom_vector2dset21, cons, 3, 3))
1007                 return AO_SCHEME_NIL;
1008         if (!ao_scheme_check_argt(_ao_scheme_atom_vector2dset21, cons, 0, AO_SCHEME_VECTOR, 0))
1009                 return AO_SCHEME_NIL;
1010         return ao_scheme_vector_set(ao_scheme_arg(cons, 0), ao_scheme_arg(cons, 1), ao_scheme_arg(cons, 2));
1011 }
1012
1013 ao_poly
1014 ao_scheme_do_list_to_vector(struct ao_scheme_cons *cons)
1015 {
1016         if (!ao_scheme_check_argc(_ao_scheme_atom_list2d3evector, cons, 1, 1))
1017                 return AO_SCHEME_NIL;
1018         if (!ao_scheme_check_argt(_ao_scheme_atom_list2d3evector, cons, 0, AO_SCHEME_CONS, 0))
1019                 return AO_SCHEME_NIL;
1020         return ao_scheme_vector_poly(ao_scheme_list_to_vector(ao_scheme_poly_cons(ao_scheme_arg(cons, 0))));
1021 }
1022
1023 ao_poly
1024 ao_scheme_do_vector_to_list(struct ao_scheme_cons *cons)
1025 {
1026         if (!ao_scheme_check_argc(_ao_scheme_atom_vector2d3elist, cons, 1, 1))
1027                 return AO_SCHEME_NIL;
1028         if (!ao_scheme_check_argt(_ao_scheme_atom_vector2d3elist, cons, 0, AO_SCHEME_VECTOR, 0))
1029                 return AO_SCHEME_NIL;
1030         return ao_scheme_cons_poly(ao_scheme_vector_to_list(ao_scheme_poly_vector(ao_scheme_arg(cons, 0))));
1031 }
1032
1033 ao_poly
1034 ao_scheme_do_vector_length(struct ao_scheme_cons *cons)
1035 {
1036         if (!ao_scheme_check_argc(_ao_scheme_atom_vector2d3elist, cons, 1, 1))
1037                 return AO_SCHEME_NIL;
1038         if (!ao_scheme_check_argt(_ao_scheme_atom_vector2d3elist, cons, 0, AO_SCHEME_VECTOR, 0))
1039                 return AO_SCHEME_NIL;
1040         return ao_scheme_integer_poly(ao_scheme_poly_vector(ao_scheme_arg(cons, 0))->length);
1041 }
1042
1043 ao_poly
1044 ao_scheme_do_vectorp(struct ao_scheme_cons *cons)
1045 {
1046         return ao_scheme_do_typep(AO_SCHEME_VECTOR, cons);
1047 }
1048
1049 #define AO_SCHEME_BUILTIN_FUNCS
1050 #include "ao_scheme_builtin.h"