1 /* -*-comment-start: "//";comment-end:""-*-
2 * Mes --- Maxwell Equations of Software
3 * Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
5 * This file is part of Mes.
7 * Mes is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3 of the License, or (at
10 * your option) any later version.
12 * Mes is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Mes. If not, see <http://www.gnu.org/licenses/>.
32 //#define QUASISYNTAX 0
36 #define MES_MINI 0 // 1 for gc-2a.test, gc-3.test
39 int ARENA_SIZE = 400000000; // need this much for scripts/mescc.mes
40 //int ARENA_SIZE = 300000000; // need this much for tests/match.scm
41 //int ARENA_SIZE = 30000000; // need this much for tests/record.scm
42 //int ARENA_SIZE = 500000; // enough for tests/scm.test
43 //int ARENA_SIZE = 60000; // enough for tests/base.test
44 int GC_SAFETY = 10000;
47 //int ARENA_SIZE = 500; // MINI
48 int ARENA_SIZE = 4000; // MES_MINI, gc-3.test
49 //int ARENA_SIZE = 10000; // gc-2a.test
50 //int ARENA_SIZE = 18000; // gc-2.test -->KRAK
51 //int ARENA_SIZE = 23000; // gc-2.test OK
52 // int GC_SAFETY = 1000;
53 // int GC_FREE = 1000;
59 enum type_t {CHAR, FUNCTION, MACRO, NUMBER, PAIR, SPECIAL, STRING, SYMBOL, REF, VALUES, VECTOR, BROKEN_HEART};
60 typedef SCM (*function0_t) (void);
61 typedef SCM (*function1_t) (SCM);
62 typedef SCM (*function2_t) (SCM, SCM);
63 typedef SCM (*function3_t) (SCM, SCM, SCM);
64 typedef SCM (*functionn_t) (SCM);
65 typedef struct function_t {
67 function0_t function0;
68 function1_t function1;
69 function2_t function2;
70 function3_t function3;
71 functionn_t functionn;
76 typedef struct scm_t {
95 function functions[200];
98 #include "mes.symbols.h"
104 #include "quasiquote.h"
108 SCM display_ (FILE* f, SCM x);
109 SCM display_helper (FILE*, SCM , bool, char const*, bool);
114 SCM r1 = 0; // param 1
115 SCM r2 = 0; // param 2
116 SCM r3 = 0; // param 3
118 scm scm_nil = {SPECIAL, "()"};
119 scm scm_f = {SPECIAL, "#f"};
120 scm scm_t = {SPECIAL, "#t"};
121 scm scm_dot = {SPECIAL, "."};
122 scm scm_undefined = {SPECIAL, "*undefined*"};
123 scm scm_unspecified = {SPECIAL, "*unspecified*"};
124 scm scm_closure = {SPECIAL, "*closure*"};
125 scm scm_circular = {SPECIAL, "*circular*"};
130 scm scm_begin = {SPECIAL, "*begin*"};
132 scm scm_symbol_lambda = {SYMBOL, "lambda"};
133 scm scm_symbol_begin = {SYMBOL, "begin"};
134 scm scm_symbol_if = {SYMBOL, "if"};
135 scm scm_symbol_define = {SYMBOL, "define"};
136 scm scm_symbol_define_macro = {SYMBOL, "define-macro"};
137 scm scm_symbol_set_x = {SYMBOL, "set!"};
139 scm scm_symbol_quote = {SYMBOL, "quote"};
140 scm scm_symbol_quasiquote = {SYMBOL, "quasiquote"};
141 scm scm_symbol_unquote = {SYMBOL, "unquote"};
142 scm scm_symbol_unquote_splicing = {SYMBOL, "unquote-splicing"};
144 scm scm_symbol_sc_expand = {SYMBOL, "sc-expand"};
145 scm scm_symbol_expand_macro = {SYMBOL, "expand-macro"};
146 scm scm_symbol_sc_expander_alist = {SYMBOL, "*sc-expander-alist*"};
147 scm scm_symbol_noexpand = {SYMBOL, "noexpand"};
148 scm scm_symbol_syntax = {SYMBOL, "syntax"};
149 scm scm_symbol_quasisyntax = {SYMBOL, "quasisyntax"};
150 scm scm_symbol_unsyntax = {SYMBOL, "unsyntax"};
151 scm scm_symbol_unsyntax_splicing = {SYMBOL, "unsyntax-splicing"};
153 scm scm_symbol_call_with_values = {SYMBOL, "call-with-values"};
154 scm scm_symbol_current_module = {SYMBOL, "current-module"};
155 scm scm_symbol_primitive_load = {SYMBOL, "primitive-load"};
157 scm char_nul = {CHAR, .name="nul", .value=0};
158 scm char_backspace = {CHAR, .name="backspace", .value=8};
159 scm char_tab = {CHAR, .name="tab", .value=9};
160 scm char_newline = {CHAR, .name="newline", .value=10};
161 scm char_vt = {CHAR, .name="vt", .value=11};
162 scm char_page = {CHAR, .name="page", .value=12};
163 scm char_return = {CHAR, .name="return", .value=13};
164 scm char_space = {CHAR, .name="space", .value=32};
166 scm g_free = {NUMBER, .value=0};
170 #define CAR(x) g_cells[x].car
171 #define CDR(x) g_cells[x].cdr
172 #define HITS(x) g_cells[x].hits
173 #define LENGTH(x) g_cells[x].length
174 #define NAME(x) g_cells[x].name
175 #define STRING(x) g_cells[x].string
176 #define TYPE(x) g_cells[x].type
177 #define MACRO(x) g_cells[x].macro
178 #define REF(x) g_cells[x].ref
179 #define VALUE(x) g_cells[x].value
180 #define VECTOR(x) g_cells[x].vector
181 #define FUNCTION(x) functions[g_cells[x].function]
182 #define NCAR(x) g_news[x].car
183 #define NTYPE(x) g_news[x].type
185 #define CAAR(x) CAR (CAR (x))
186 #define CDAR(x) CDR (CAR (x))
187 #define CAAR(x) CAR (CAR (x))
188 #define CADAR(x) CAR (CDR (CAR (x)))
189 #define CDADAR(x) CAR (CDR (CAR (CDR (x))))
190 #define CADR(x) CAR (CDR (x))
195 assert (TYPE (x) == PAIR);
202 assert (TYPE (x) == PAIR);
209 assert (g_free.value + n < ARENA_SIZE);
210 SCM x = g_free.value;
219 g_news = (scm *)malloc (ARENA_SIZE*sizeof(scm));
220 g_news[0].type = VECTOR;
221 g_news[0].length = 1000;
222 g_news[0].vector = 0;
224 g_news[0].type = CHAR;
225 g_news[0].value = 'n';
232 fprintf (stderr, "***gc[%d]...", g_free.value);
236 for (int i=g_free.value; i<g_start; i++)
238 symbols = gc_copy (symbols);
239 SCM new = gc_copy (stack);
240 fprintf (stderr, "new=%d, start=%d\n", new, stack);
248 while (scan < g_free.value)
250 if (NTYPE (scan) == MACRO
251 || NTYPE (scan) == PAIR
252 || NTYPE (scan) == REF
254 || ((NTYPE (scan) == SPECIAL && TYPE (NCAR (scan)) == PAIR)
255 || (NTYPE (scan) == STRING && TYPE (NCAR (scan)) == PAIR)
256 || (NTYPE (scan) == SYMBOL && TYPE (NCAR (scan)) == PAIR)))
258 SCM car = gc_copy (g_news[scan].car);
259 gc_relocate_car (scan, car);
261 if ((NTYPE (scan) == MACRO
262 || NTYPE (scan) == PAIR
263 || NTYPE (scan) == VALUES)
264 && g_news[scan].cdr) // allow for 0 terminated list of symbols
266 SCM cdr = gc_copy (g_news[scan].cdr);
267 gc_relocate_cdr (scan, cdr);
277 if (TYPE (old) == BROKEN_HEART) return g_cells[old].car;
278 SCM new = g_free.value++;
279 g_news[new] = g_cells[old];
280 if (NTYPE (new) == VECTOR)
282 g_news[new].vector = g_free.value;
283 for (int i=0; i<LENGTH (old); i++)
284 g_news[g_free.value++] = g_cells[VECTOR (old)+i];
286 g_cells[old].type = BROKEN_HEART;
287 g_cells[old].car = new;
292 gc_relocate_car (SCM new, SCM car)
294 g_news[new].car = car;
295 return cell_unspecified;
299 gc_relocate_cdr (SCM new, SCM cdr)
301 g_news[new].cdr = cdr;
302 return cell_unspecified;
308 scm *cells = g_cells;
311 fprintf (stderr, " => jam[%d]\n", g_free.value);
318 fprintf (stderr, "cells: ");
320 display_ (stderr, -1);
321 fprintf (stderr, "\n");
324 fprintf (stderr, "news: ");
326 display_ (stderr, -1);
327 fprintf (stderr, "\n");
330 return cell_unspecified;
340 make_cell (SCM type, SCM car, SCM cdr)
342 SCM x = gc_alloc (1);
343 assert (TYPE (type) == NUMBER);
344 TYPE (x) = VALUE (type);
345 if (VALUE (type) == CHAR || VALUE (type) == NUMBER) {
346 if (car) CAR (x) = CAR (car);
347 if (cdr) CDR (x) = CDR (cdr);
348 } else if (VALUE (type) == FUNCTION) {
349 if (car) CAR (x) = car;
350 if (cdr) CDR (x) = CDR (cdr);
361 g_cells[tmp_num].value = PAIR;
362 return make_cell (tmp_num, x, y);
369 || (TYPE (x) == CHAR && TYPE (y) == CHAR
370 && VALUE (x) == VALUE (y))
371 || (TYPE (x) == NUMBER && TYPE (y) == NUMBER
372 && VALUE (x) == VALUE (y)))
377 set_car_x (SCM x, SCM e)
379 assert (TYPE (x) == PAIR);
381 return cell_unspecified;
385 set_cdr_x (SCM x, SCM e)
387 assert (TYPE (x) == PAIR);
388 cache_invalidate (cdr (x));
390 return cell_unspecified;
394 set_env_x (SCM x, SCM e, SCM a)
396 cache_invalidate (x);
397 SCM p = assert_defined (x, assq (x, a));
398 return set_cdr_x (p, e);
404 return cons (cell_symbol_quote, x);
410 return cons (cell_symbol_quasiquote, x);
416 return cons (cell_symbol_quasisyntax, x);
420 pairlis (SCM x, SCM y, SCM a)
424 if (pair_p (x) == cell_f)
425 return cons (cons (x, y), a);
426 return cons (cons (car (x), car (y)),
427 pairlis (cdr (x), cdr (y), a));
433 while (a != cell_nil && eq_p (x, CAAR (a)) == cell_f)
435 if (TYPE (a) == BROKEN_HEART || TYPE (CAR (a)) == BROKEN_HEART)
436 fprintf (stderr, "oops, broken heart\n");
439 return a != cell_nil ? car (a) : cell_f;
443 #define CACHE_SIZE 30
448 assq_ref_cache (SCM x, SCM a)
451 if (x == cell_f) return cell_undefined;
454 SCM cache_invalidate (SCM x){}
455 SCM cache_invalidate_range (SCM p,SCM a){}
456 SCM cache_save (SCM p){}
457 SCM cache_lookup (SCM x){}
461 SCM env_cache_cars[CACHE_SIZE];
462 SCM env_cache_cdrs[CACHE_SIZE];
463 int cache_threshold = 0;
467 int n = g_cells[car (p)].hits;
468 if (n < cache_threshold) return cell_unspecified;
470 for (int i=0; i < CACHE_SIZE; i++) {
471 if (!env_cache_cars[i]) {
475 if (env_cache_cars[i] == car (p)) return cell_unspecified;
476 if (n > g_cells[env_cache_cars[i]].hits) {
477 n = g_cells[env_cache_cars[i]].hits;
482 cache_threshold = g_cells[car (p)].hits;
483 env_cache_cars[j] = car (p);
484 env_cache_cdrs[j] = cdr (p);
486 return cell_unspecified;
492 for (int i=0; i < CACHE_SIZE; i++) {
493 if (!env_cache_cars[i]) break;
494 if (env_cache_cars[i] == x) return env_cache_cdrs[i];
496 return cell_undefined;
500 cache_invalidate (SCM x)
502 for (int i=0; i < CACHE_SIZE; i++) {
503 if (env_cache_cars[i] == x) {
504 env_cache_cars[i] = 0;
508 return cell_unspecified;
512 cache_invalidate_range (SCM p, SCM a)
515 cache_invalidate (caar (p));
518 return cell_unspecified;
522 assq_ref_cache (SCM x, SCM a)
525 SCM c = cache_lookup (x);
526 if (c != cell_undefined) return c;
528 while (a != cell_nil && x != CAAR (a)) {i++;a = cdr (a);}
529 if (a == cell_nil) return cell_undefined;
530 if (i>ENV_HEAD) cache_save (car (a));
536 assert_defined (SCM x, SCM e)
538 if (e == cell_undefined)
540 fprintf (stderr, "eval: unbound variable:");
541 display_ (stderr, x);
542 fprintf (stderr, "\n");
543 assert (!"unbound variable");
551 SCM frame = car (stack);
562 SCM frame = cons (r1, cons (r2, cons (r3, cons (r0, cell_nil))));
563 stack = cons (frame, stack);
571 vm_call (function0_t f, SCM p1, SCM p2, SCM a)
573 SCM frame = cons (r1, cons (r2, cons (r3, cons (r0, cell_nil))));
574 stack = cons (frame, stack);
578 if (f == vm_if_env && g_free.value + GC_SAFETY > ARENA_SIZE)
580 cache_invalidate_range (r0, cell_nil);
586 frame = gc_frame (stack);
592 evlis_env (SCM m, SCM a)
594 return vm_call (vm_evlis_env, m, cell_undefined, a);
598 apply_env (SCM fn, SCM x, SCM a)
600 return vm_call (vm_apply_env, fn, x, a);
604 eval_env (SCM e, SCM a)
606 return vm_call (vm_eval_env, e, cell_undefined, a);
610 expand_macro_env (SCM e, SCM a)
612 return vm_call (vm_expand_macro_env, e, cell_undefined, a);
616 begin_env (SCM e, SCM a)
618 return vm_call (vm_begin_env, e, cell_undefined, a);
622 if_env (SCM e, SCM a)
624 return vm_call (vm_if_env, e, cell_undefined, a);
628 call_lambda (SCM e, SCM x, SCM aa, SCM a) ///((internal))
630 SCM cl = cons (cons (cell_closure, x), x);
635 cache_invalidate_range (r0, CDR (r3));
636 SCM r = vm_call_lambda ();
637 cache_invalidate_range (r0, CDR (r3));
644 if (r1 == cell_nil) return cell_nil;
645 if (TYPE (r1) != PAIR) return eval_env (r1, r0);
646 r2 = eval_env (car (r1), r0);
647 r1 = evlis_env (cdr (r1), r0);
648 return cons (r2, r1);
654 return vm_call (vm_begin_env, r1, cell_undefined, r0);
660 if (TYPE (r1) != PAIR)
662 if (TYPE (r1) == FUNCTION) return call (r1, r2);
663 if (r1 == cell_symbol_call_with_values)
664 return call_with_values_env (car (r2), cadr (r2), r0);
665 if (r1 == cell_symbol_current_module) return r0;
667 else if (car (r1) == cell_symbol_lambda) {
668 SCM args = cadr (r1);
669 SCM body = cddr (r1);
670 SCM p = pairlis (args, r2, r0);
671 return call_lambda (body, p, p, r0);
673 // cache_invalidate_range (r2, g_cells[r0].cdr);
674 // SCM r = begin_env (cddr (r1), cons (cons (cell_closure, p), p));
675 // cache_invalidate_range (r2, g_cells[r0].cdr);
678 else if (car (r1) == cell_closure) {
679 SCM args = caddr (r1);
680 SCM body = cdddr (r1);
683 SCM p = pairlis (args, r2, aa);
684 return call_lambda (body, p, aa, r0);
687 // cache_invalidate_range (r2, g_cells[r3].cdr);
688 // SCM r = begin_env (body, cons (cons (cell_closure, p), p));
689 // cache_invalidate_range (r2, g_cells[r3].cdr);
693 else if (car (r1) == cell_symbol_label)
694 return apply_env (caddr (r1), r2, cons (cons (cadr (r1), caddr (r1)), r0));
696 SCM e = eval_env (r1, r0);
697 char const* type = 0;
698 if (e == cell_f || e == cell_t) type = "bool";
699 if (TYPE (e) == CHAR) type = "char";
700 if (TYPE (e) == NUMBER) type = "number";
701 if (TYPE (e) == STRING) type = "string";
702 if (e == cell_unspecified) type = "*unspecified*";
703 if (e == cell_undefined) type = "*undefined*";
706 fprintf (stderr, "cannot apply: %s: ", type);
707 display_ (stderr, e);
708 fprintf (stderr, " [");
709 display_ (stderr, r1);
710 fprintf (stderr, "]\n");
711 assert (!"cannot apply");
713 return apply_env (e, r2, r0);
716 SCM cstring_to_list (char const* s);
725 if (car (r1) == cell_symbol_quote)
728 if (car (r1) == cell_symbol_syntax)
731 if (car (r1) == cell_symbol_begin)
732 return begin_env (r1, r0);
733 if (car (r1) == cell_symbol_lambda)
734 return make_closure (cadr (r1), cddr (r1), assq (cell_closure, r0));
735 if (car (r1) == cell_closure)
737 if (car (r1) == cell_symbol_if)
738 return if_env (cdr (r1), r0);
740 if (car (r1) == cell_symbol_define)
741 return define_env (r1, r0);
742 if (car (r1) == cell_symbol_define_macro)
743 return define_env (r1, r0);
744 if (car (r1) == cell_symbol_primitive_load)
745 return load_env (r0);
747 if (car (r1) == cell_symbol_define) {
748 fprintf (stderr, "C DEFINE: ");
750 TYPE (cadr (r1)) == SYMBOL
752 : STRING (caadr (r1)));
753 fprintf (stderr, "\n");
755 assert (car (r1) != cell_symbol_define);
756 assert (car (r1) != cell_symbol_define_macro);
759 if (car (r1) == cell_symbol_set_x)
760 return set_env_x (cadr (r1), eval_env (caddr (r1), r0), r0);
762 assert (car (r1) != cell_symbol_set_x);
765 if (car (r1) == cell_symbol_unquote)
766 return eval_env (cadr (r1), r0);
767 if (car (r1) == cell_symbol_quasiquote)
768 return eval_quasiquote (cadr (r1), add_unquoters (r0));
771 if (car (r1) == cell_symbol_unsyntax)
772 return eval_env (cadr (r1), r0);
773 if (car (r1) == cell_symbol_quasisyntax)
774 return eval_quasisyntax (cadr (r1), add_unsyntaxers (r0));
776 SCM x = expand_macro_env (r1, r0);
778 return eval_env (x, r0);
779 SCM m = evlis_env (CDR (r1), r0);
780 return apply_env (car (r1), m, r0);
782 case SYMBOL: return assert_defined (r1, assq_ref_cache (r1, r0));
788 vm_expand_macro_env ()
790 if (TYPE (CAR (r1)) == STRING && string_to_symbol (CAR (r1)) == cell_symbol_noexpand)
795 if (TYPE (r1) == PAIR
796 && (macro = lookup_macro (car (r1), r0)) != cell_f)
797 return apply_env (macro, CDR (r1), r0);
798 else if (TYPE (r1) == PAIR
799 && TYPE (CAR (r1)) == SYMBOL
800 && ((expanders = assq_ref_cache (cell_symbol_sc_expander_alist, r0)) != cell_undefined)
801 && ((macro = assq (CAR (r1), expanders)) != cell_f))
803 SCM sc_expand = assq_ref_cache (cell_symbol_expand_macro, r0);
804 if (sc_expand != cell_undefined && sc_expand != cell_f)
805 r1 = apply_env (sc_expand, cons (r1, cell_nil), r0);
813 SCM r = cell_unspecified;
814 while (r1 != cell_nil) {
815 if (TYPE (r1) == PAIR && TYPE (CAR (r1)) == PAIR && caar (r1) == cell_symbol_begin)
816 r1 = append2 (cdar (r1), cdr (r1));
817 r = eval_env (car (r1), r0);
826 SCM x = eval_env (car (r1), r0);
828 return eval_env (cadr (r1), r0);
829 if (cddr (r1) != cell_nil)
830 return eval_env (caddr (r1), r0);
831 return cell_unspecified;
837 if ((FUNCTION (fn).arity > 0 || FUNCTION (fn).arity == -1)
838 && x != cell_nil && TYPE (CAR (x)) == VALUES)
839 x = cons (CADAR (x), CDR (x));
840 if ((FUNCTION (fn).arity > 1 || FUNCTION (fn).arity == -1)
841 && x != cell_nil && TYPE (CDR (x)) == PAIR && TYPE (CADR (x)) == VALUES)
842 x = cons (CAR (x), cons (CDADAR (x), CDR (x)));
843 switch (FUNCTION (fn).arity)
845 case 0: return FUNCTION (fn).function0 ();
846 case 1: return FUNCTION (fn).function1 (car (x));
847 case 2: return FUNCTION (fn).function2 (car (x), cadr (x));
848 case 3: return FUNCTION (fn).function3 (car (x), cadr (x), caddr (x));
849 case -1: return FUNCTION (fn).functionn (x);
851 return cell_unspecified;
855 append2 (SCM x, SCM y)
857 if (x == cell_nil) return y;
858 assert (TYPE (x) == PAIR);
859 return cons (car (x), append2 (cdr (x), y));
863 append (SCM x) ///((arity . n))
865 if (x == cell_nil) return cell_nil;
866 return append2 (car (x), append (cdr (x)));
872 g_cells[tmp_num].value = CHAR;
873 g_cells[tmp_num2].value = x;
874 return make_cell (tmp_num, tmp_num2, tmp_num2);
878 make_function (SCM name, SCM id, SCM arity)
880 g_cells[tmp_num3].value = FUNCTION;
881 // function fun_read_byte = {.function0=&read_byte, .arity=0};
882 // scm scm_read_byte = {FUNCTION, .name="read-int", .function=&fun_read_byte};
883 // SCM cell_read_byte = 93;
884 function *f = (function*)malloc (sizeof (function));
885 f->arity = VALUE (arity);
886 g_cells[tmp_num4].value = (long)f;
887 return make_cell (tmp_num3, name, tmp_num4);
891 make_macro (SCM name, SCM x)
893 g_cells[tmp_num].value = MACRO;
894 return make_cell (tmp_num, STRING (name), x);
900 g_cells[tmp_num].value = NUMBER;
901 g_cells[tmp_num2].value = x;
902 return make_cell (tmp_num, tmp_num2, tmp_num2);
908 g_cells[tmp_num].value = REF;
909 return make_cell (tmp_num, x, x);
915 g_cells[tmp_num].value = STRING;
916 return make_cell (tmp_num, x, 0);
920 cstring_to_list (char const* s)
925 p = cons (make_char (s[i]), p);
930 list_of_char_equal_p (SCM a, SCM b)
932 while (a != cell_nil && b != cell_nil && VALUE (car (a)) == VALUE (car (b))) {
933 assert (TYPE (car (a)) == CHAR);
934 assert (TYPE (car (b)) == CHAR);
938 return (a == cell_nil && b == cell_nil) ? cell_t : cell_f;
942 internal_lookup_symbol (SCM s)
946 // .string and .name is the same field; .name is used as a handy
947 // static field initializer. A string can only be mistaken for a
948 // cell with type == PAIR for the one character long, zero-padded
950 SCM p = STRING (car (x));
951 if (p < 0 || p >= g_free.value || TYPE (p) != PAIR)
952 STRING (car (x)) = cstring_to_list (NAME (car (x)));
953 if (list_of_char_equal_p (STRING (car (x)), s) == cell_t) break;
961 internal_make_symbol (SCM s)
963 g_cells[tmp_num].value = SYMBOL;
964 SCM x = make_cell (tmp_num, s, 0);
965 symbols = cons (x, symbols);
972 SCM x = internal_lookup_symbol (s);
973 return x ? x : internal_make_symbol (s);
980 g_cells[tmp_num].value = VECTOR;
981 SCM v = gc_alloc (k);
982 SCM x = make_cell (tmp_num, k, v);
983 for (int i=0; i<k; i++) g_cells[v+i] = g_cells[vector_entry (cell_unspecified)];
988 values (SCM x) ///((arity . n))
996 call_with_values_env (SCM producer, SCM consumer, SCM a)
998 SCM v = apply_env (producer, cell_nil, a);
999 if (TYPE (v) == VALUES)
1001 return apply_env (consumer, v, a);
1005 vector_length (SCM x)
1007 assert (TYPE (x) == VECTOR);
1008 return make_number (LENGTH (x));
1012 vector_ref (SCM x, SCM i)
1014 assert (TYPE (x) == VECTOR);
1015 assert (VALUE (i) < LENGTH (x));
1016 SCM e = VECTOR (x) + VALUE (i);
1017 if (TYPE (e) == REF) e = g_cells[e].ref;
1018 if (TYPE (e) == CHAR) e = make_char (VALUE (e));
1019 if (TYPE (e) == NUMBER) e = make_number (VALUE (e));
1024 vector_entry (SCM x) {
1025 if (TYPE (x) == PAIR || TYPE (x) == SPECIAL || TYPE (x) == STRING || TYPE (x) == SYMBOL || TYPE (x) == VECTOR) x = make_ref (x);
1030 vector_set_x (SCM x, SCM i, SCM e)
1032 assert (TYPE (x) == VECTOR);
1033 assert (VALUE (i) < LENGTH (x));
1034 g_cells[VECTOR (x)+g_cells[i].value] = g_cells[vector_entry (e)];
1035 return cell_unspecified;
1039 lookup (SCM s, SCM a)
1041 if (isdigit (VALUE (car (s))) || (VALUE (car (s)) == '-' && cdr (s) != cell_nil)) {
1044 if (VALUE (car (s)) == '-') {
1049 while (p != cell_nil && isdigit (VALUE (car (p)))) {
1051 n += VALUE (car (p)) - '0';
1054 if (p == cell_nil) return make_number (n * sign);
1057 SCM x = internal_lookup_symbol (s);
1060 if (cdr (s) == cell_nil) {
1061 if (VALUE (car (s)) == '\'') return cell_symbol_quote;
1062 if (VALUE (car (s)) == '`') return cell_symbol_quasiquote;
1063 if (VALUE (car (s)) == ',') return cell_symbol_unquote;
1065 else if (cddr (s) == cell_nil) {
1066 if (VALUE (car (s)) == ',' && VALUE (cadr (s)) == '@') return cell_symbol_unquote_splicing;
1067 if (VALUE (car (s)) == '#' && VALUE (cadr (s)) == '\'') return cell_symbol_syntax;
1068 if (VALUE (car (s)) == '#' && VALUE (cadr (s)) == '`') return cell_symbol_quasisyntax;
1069 if (VALUE (car (s)) == '#' && VALUE (cadr (s)) == ',') return cell_symbol_unsyntax;
1071 else if (cdddr (s) == cell_nil) {
1072 if (VALUE (car (s)) == '#' && VALUE (cadr (s)) == ',' && VALUE (caddr (s)) == '@') return cell_symbol_unsyntax_splicing;
1073 if (VALUE (car (s)) == 'E' && VALUE (cadr (s)) == 'O' && VALUE (caddr (s)) == 'F') {
1074 fprintf (stderr, "mes: got EOF\n");
1075 return cell_nil; // `EOF': eval program, which may read stdin
1079 return internal_make_symbol (s);
1083 lookup_char (int c, SCM a)
1085 return lookup (cons (make_char (c), cell_nil), a);
1089 list_to_vector (SCM x)
1091 g_cells[tmp_num].value = VALUE (length (x));
1092 SCM v = make_vector (tmp_num);
1094 while (x != cell_nil)
1096 g_cells[p++] = g_cells[vector_entry (car (x))];
1103 force_output (SCM p) ///((arity . n))
1106 if (TYPE (p) == PAIR && TYPE (car (p)) == NUMBER) fd = VALUE (car (p));
1107 FILE *f = fd == 1 ? stdout : stderr;
1112 display_ (FILE* f, SCM x)
1114 return display_helper (f, x, false, "", false);
1118 display (SCM x) ///((arity . n))
1123 if (TYPE (p) == PAIR && TYPE (car (p)) == NUMBER) fd = HITS (car (p));
1124 FILE *f = fd == 1 ? stdout : stderr;
1125 return display_helper (f, e, false, "", false);
1129 newline (SCM p) ///((arity . n))
1132 if (TYPE (p) == PAIR && TYPE (car (p)) == NUMBER) fd = VALUE (car (p));
1133 FILE *f = fd == 1 ? stdout : stderr;
1135 return cell_unspecified;
1139 display_helper (FILE* f, SCM x, bool cont, char const *sep, bool quote)
1142 fprintf (f, "%s", sep);
1147 char const *name = 0;
1148 if (VALUE (x) == char_nul.value) name = char_nul.name;
1149 else if (VALUE (x) == char_backspace.value) name = char_backspace.name;
1150 else if (VALUE (x) == char_tab.value) name = char_tab.name;
1151 else if (VALUE (x) == char_newline.value) name = char_newline.name;
1152 else if (VALUE (x) == char_vt.value) name = char_vt.name;
1153 else if (VALUE (x) == char_page.value) name = char_page.name;
1154 else if (VALUE (x) == char_return.value) name = char_return.name;
1155 else if (VALUE (x) == char_space.value) name = char_space.name;
1156 if (name) fprintf (f, "#\\%s", name);
1157 else fprintf (f, "#\\%c", VALUE (x));
1161 fprintf (f, "(*macro* ");
1162 display_helper (f, g_cells[x].macro, cont, sep, quote);
1165 case NUMBER: fprintf (f, "%d", VALUE (x)); break;
1168 if (car (x) == cell_circular) {
1169 fprintf (f, "(*circ* . #-1#)");
1170 return cell_unspecified;
1172 if (car (x) == cell_closure) {
1173 fprintf (f, "(*closure* . #-1#)");
1174 return cell_unspecified;
1176 if (car (x) == cell_symbol_quote) {
1178 return display_helper (f, car (cdr (x)), cont, "", true);
1180 if (!cont) fprintf (f, "(");
1181 display_ (f, car (x));
1182 if (cdr (x) && TYPE (cdr (x)) == PAIR)
1183 display_helper (f, cdr (x), true, " ", false);
1184 else if (cdr (x) != cell_nil) {
1186 display_ (f, cdr (x));
1188 if (!cont) fprintf (f, ")");
1194 for (int i = 0; i < LENGTH (x); i++) {
1195 if (TYPE (VECTOR (x)+i) == VECTOR
1196 || (TYPE (VECTOR (x)+i) == REF
1197 && TYPE (REF (VECTOR (x)+i)) == VECTOR))
1198 fprintf (f, "%s#(...)", i ? " " : "");
1200 display_helper (f,VECTOR (x)+i, false, i ? " " : "", false);
1205 case REF: display_helper (f, g_cells[x].ref, cont, "", true); break;
1208 fprintf (f, "#<procedure ");
1210 if (p < 0 || p >= g_free.value || TYPE (p) != PAIR)
1211 fprintf (f, "%s", NAME (x));
1213 display_ (f, STRING (x));
1217 case BROKEN_HEART: fprintf (f, "<3"); break;
1223 while (p != cell_nil) {
1224 assert (TYPE (car (p)) == CHAR);
1225 fputc (VALUE (car (p)), f);
1229 else if (TYPE (x) != PAIR && NAME (x)) fprintf (f, "%s", NAME (x));
1231 return cell_unspecified;
1240 return getc (g_stdin);
1246 return ungetc (c, g_stdin);
1260 return make_char (peekchar ());
1266 return make_char (getchar ());
1270 write_char (SCM x) ///((arity . n))
1275 if (TYPE (p) == PAIR && TYPE (car (p)) == NUMBER) fd = VALUE (car (p));
1276 FILE *f = fd == 1 ? stdout : stderr;
1277 assert (TYPE (c) == NUMBER || TYPE (c) == CHAR);
1278 fputc (VALUE (c), f);
1285 assert (TYPE (c) == NUMBER || TYPE (c) == CHAR);
1286 ungetchar (VALUE (c));
1291 symbol_to_list (SCM x)
1293 assert (TYPE (x) == SYMBOL);
1300 if (c == '\n') return c;
1301 return readcomment (getchar ());
1307 if (c == '!' && peekchar () == '#') return getchar ();
1308 return readblock (getchar ());
1312 readword (int c, SCM w, SCM a)
1314 if (c == EOF && w == cell_nil) return cell_nil;
1315 if (c == '\n' && w == cell_nil) return readword (getchar (), w, a);
1316 if (c == '\n' && VALUE (car (w)) == '.' && cdr (w) == cell_nil) return cell_dot;
1317 if (c == EOF || c == '\n') return lookup (w, a);
1318 if (c == ' ') return readword ('\n', w, a);
1319 if (c == '"' && w == cell_nil) return readstring ();
1320 if (c == '"') {ungetchar (c); return lookup (w, a);}
1321 if (c == '(' && w == cell_nil) return readlist (a);
1322 if (c == '(') {ungetchar (c); return lookup (w, a);}
1323 if (c == ')' && w == cell_nil) {ungetchar (c); return cell_nil;}
1324 if (c == ')') {ungetchar (c); return lookup (w, a);}
1325 if (c == ',' && peekchar () == '@') {getchar (); return cons (lookup (STRING (cell_symbol_unquote_splicing), a),
1326 cons (readword (getchar (), w, a),
1331 && w == cell_nil) {return cons (lookup_char (c, a),
1332 cons (readword (getchar (), w, a),
1334 if (c == '#' && peekchar () == ',' && w == cell_nil) {
1336 if (peekchar () == '@'){getchar (); return cons (lookup (STRING (cell_symbol_unsyntax_splicing), a),
1337 cons (readword (getchar (), w, a),
1339 return cons (lookup (STRING (cell_symbol_unsyntax), a), cons (readword (getchar (), w, a), cell_nil));
1341 if (c == '#' && (peekchar () == '\'' || peekchar () == '`') && w == cell_nil) {
1343 return cons (lookup (cons (make_char ('#'), cons (make_char (c), cell_nil)), a),
1344 cons (readword (getchar (), w, a), cell_nil));}
1345 if (c == ';') {readcomment (c); return readword ('\n', w, a);}
1346 if (c == '#' && peekchar () == 'x') {getchar (); return read_hex ();}
1347 if (c == '#' && peekchar () == '\\') {getchar (); return read_character ();}
1348 if (c == '#' && w == cell_nil && peekchar () == '(') {getchar (); return list_to_vector (readlist (a));}
1349 if (c == '#' && peekchar () == '(') {ungetchar (c); return lookup (w, a);}
1350 if (c == '#' && peekchar () == '!') {getchar (); readblock (getchar ()); return readword (getchar (), w, a);}
1351 return readword (getchar (), append2 (w, cons (make_char (c), cell_nil)), a);
1358 int c = peekchar ();
1359 while ((c >= '0' && c <= '9')
1360 || (c >= 'A' && c <= 'F')
1361 || (c >= 'a' && c <= 'f')) {
1363 if (c >= 'a') n += c - 'a' + 10;
1364 else if (c >= 'A') n += c - 'A' + 10;
1369 return make_number (n);
1376 if (c >= '0' && c <= '7'
1377 && peekchar () >= '0' && peekchar () <= '7') {
1379 while (peekchar () >= '0' && peekchar () <= '7') {
1381 c += getchar () - '0';
1384 else if (c >= 'a' && c <= 'z'
1385 && peekchar () >= 'a' && peekchar () <= 'z') {
1389 while (peekchar () >= 'a' && peekchar () <= 'z') {
1393 if (!strcmp (buf, char_nul.name)) c = char_nul.value;
1394 else if (!strcmp (buf, char_backspace.name)) c = char_backspace.value;
1395 else if (!strcmp (buf, char_tab.name)) c = char_tab.value;
1396 else if (!strcmp (buf, char_newline.name)) c = char_newline.value;
1397 else if (!strcmp (buf, char_vt.name)) c = char_vt.value;
1398 else if (!strcmp (buf, char_page.name)) c = char_page.value;
1399 else if (!strcmp (buf, char_return.name)) c = char_return.value;
1400 else if (!strcmp (buf, char_space.name)) c = char_space.value;
1402 fprintf (stderr, "char not supported: %s\n", buf);
1403 assert (!"char not supported");
1406 return make_char (c);
1410 append_char (SCM x, int i)
1412 return append2 (x, cons (make_char (i), cell_nil));
1421 if (c == '"') break;
1422 if (c == '\\' && peekchar () == '"') p = append_char (p, getchar ());
1423 else if (c == '\\' && peekchar () == 'n') {getchar (); p = append_char (p, '\n');}
1424 else if (c == EOF) assert (!"EOF in string");
1425 else p = append_char (p, c);
1428 return make_string (p);
1432 eat_whitespace (int c)
1434 while (c == ' ' || c == '\t' || c == '\n') c = getchar ();
1435 if (c == ';') return eat_whitespace (readcomment (c));
1436 if (c == '#' && peekchar () == '!') {getchar (); readblock (getchar ()); return eat_whitespace (getchar ());}
1444 c = eat_whitespace (c);
1445 if (c == ')') return cell_nil;
1446 SCM w = readword (c, cell_nil, a);
1448 return car (readlist (a));
1449 return cons (w, readlist (a));
1455 return readword (getchar (), cell_nil, a);
1459 acons (SCM key, SCM value, SCM alist)
1461 return cons (cons (key, value), alist);
1465 add_environment (SCM a, char const *name, SCM x)
1467 return acons (make_symbol (cstring_to_list (name)), x, a);
1471 mes_environment () ///((internal))
1474 g_cells = (scm *)malloc (ARENA_SIZE*sizeof(scm));
1475 g_cells[0].type = VECTOR;
1476 g_cells[0].length = ARENA_SIZE - 1;
1477 g_cells[0].length = 10;
1478 g_cells[0].vector = 0;
1480 // a = add_environment (a, "%free", &g_free); hihi, gets <3 moved
1481 // a = add_environment (a, "%the-cells", g_cells);
1482 // a = add_environment (a, "%new-cells", g_news);
1484 //#include "mes.symbols.i"
1486 g_cells[0].type = CHAR;
1487 g_cells[0].value = 'c';
1488 g_free.value = 1; // 0 is tricky
1491 #include "mes.symbols.i"
1493 cell_nil = g_free.value++;
1494 g_cells[cell_nil] = scm_nil;
1495 cell_f = g_free.value++;
1496 g_cells[cell_f] = scm_f;
1497 cell_t = g_free.value++;
1498 g_cells[cell_t] = scm_t;
1499 cell_undefined = g_free.value++;
1500 g_cells[cell_undefined] = scm_undefined;
1501 cell_unspecified = g_free.value++;
1502 g_cells[cell_unspecified] = scm_unspecified;
1503 cell_closure = g_free.value++;
1504 g_cells[cell_closure] = scm_closure;
1505 cell_begin = g_free.value++;
1506 g_cells[cell_begin] = scm_begin;
1508 cell_symbol_begin = g_free.value++;
1509 g_cells[cell_symbol_begin] = scm_symbol_begin;
1511 cell_symbol_sc_expander_alist = g_free.value++;
1512 g_cells[cell_symbol_sc_expander_alist] = scm_symbol_sc_expander_alist;
1513 cell_symbol_sc_expand = g_free.value++;
1514 g_cells[cell_symbol_sc_expand] = scm_symbol_sc_expand;
1516 // cell_dot = g_free.value++;
1517 // g_cells[cell_dot] = scm_dot;
1518 // cell_circular = g_free.value++;
1519 // g_cells[cell_circular] = scm_circular;
1520 // cell_symbol_lambda = g_free.value++;
1521 // g_cells[cell_symbol_lambda] = scm_symbol_lambda;
1522 // cell_symbol_if = g_free.value++;
1523 // g_cells[cell_symbol_if] = scm_symbol_if;
1524 // cell_symbol_define = g_free.value++;
1525 // g_cells[cell_symbol_define] = scm_symbol_define;
1526 // cell_symbol_define_macro = g_free.value++;
1527 // g_cells[cell_symbol_define_macro] = scm_symbol_define_macro;
1531 SCM symbol_max = g_free.value;
1539 #include "quasiquote.i"
1544 cell_cons = g_free.value++;
1545 cell_display = g_free.value++;
1546 cell_eq_p = g_free.value++;
1547 cell_newline = g_free.value++;
1549 g_cells[cell_cons] = scm_cons;
1550 g_cells[cell_display] = scm_display;
1551 g_cells[cell_eq_p] = scm_eq_p;
1552 g_cells[cell_newline] = scm_newline;
1554 cell_make_vector = g_free.value++;
1555 g_cells[cell_make_vector] = scm_make_vector;
1559 tmp = g_free.value++;
1560 tmp_num = g_free.value++;
1561 g_cells[tmp_num].type = NUMBER;
1562 tmp_num2 = g_free.value++;
1563 g_cells[tmp_num2].type = NUMBER;
1565 g_start = g_free.value;
1568 for (int i=1; i<symbol_max; i++)
1569 symbols = cons (i, symbols);
1574 #include "define.environment.i"
1575 #include "lib.environment.i"
1576 #include "math.environment.i"
1577 #include "mes.environment.i"
1578 #include "posix.environment.i"
1579 //#include "quasiquote.environment.i"
1580 #include "string.environment.i"
1581 #include "type.environment.i"
1584 a = add_environment (a, "cons", cell_cons);
1585 a = add_environment (a, "display", cell_display);
1586 a = add_environment (a, "eq?", cell_eq_p);
1587 a = add_environment (a, "newline", cell_newline);
1589 a = add_environment (a, "make-vector", cell_make_vector);
1592 a = add_environment (a, "*", cell_multiply);
1593 a = add_environment (a, "list", cell_list);
1595 a = add_environment (a, "car", cell_car);
1596 a = add_environment (a, "cdr", cell_cdr);
1597 a = add_environment (a, "+", cell_plus);
1598 a = add_environment (a, "quote", cell_quote);
1599 a = add_environment (a, "null?", cell_null_p);
1600 a = add_environment (a, "=", cell_is_p);
1602 // a = add_environment (a, "gc", cell_gc);
1603 // a = add_environment (a, "apply-env", cell_apply_env);
1604 // a = add_environment (a, "eval-env", cell_eval_env);
1605 // a = add_environment (a, "cadr", cell_cadr);
1610 ////symbols = cons (cell_symbol_label, symbols);
1611 a = cons (cons (cell_symbol_label, cell_t), a);
1613 a = cons (cons (cell_symbol_begin, cell_begin), a);
1615 a = add_environment (a, "sc-expand", cell_f);
1617 a = cons (cons (cell_closure, a), a);
1619 internal_lookup_symbol (cell_nil);
1625 stack = cons (cell_nil, cell_nil);
1631 make_lambda (SCM args, SCM body)
1633 return cons (cell_symbol_lambda, cons (args, body));
1637 make_closure (SCM args, SCM body, SCM a)
1639 return cons (cell_closure, cons (cons (cell_circular, a), cons (args, body)));
1643 lookup_macro (SCM x, SCM a)
1645 if (TYPE (x) != SYMBOL) return cell_f;
1646 SCM m = assq_ref_cache (x, a);
1647 if (macro_p (m) == cell_t) return MACRO (m);
1652 read_input_file_env (SCM e, SCM a)
1654 if (e == cell_nil) return e;
1655 return cons (e, read_input_file_env (read_env (a), a));
1661 SCM p = read_input_file_env (read_env (a), a);
1662 return begin_env (p, a);
1670 #include "quasiquote.c"
1674 main (int argc, char *argv[])
1676 if (argc > 1 && !strcmp (argv[1], "--help")) return puts ("Usage: mes < FILE\n");
1677 if (argc > 1 && !strcmp (argv[1], "--version")) return puts ("Mes 0.2\n");
1679 SCM a = mes_environment ();
1680 display_ (stderr, load_env (a));
1682 fprintf (stderr, "\nstats: [%d]\n", g_free.value);