1 /* -*-comment-start: "//";comment-end:""-*-
2 * Mes --- Maxwell Equations of Software
3 * Copyright © 2016,2017 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/>.
24 #define assert(x) ((x) ? (void)0 : assert_fail (#x))
27 //void *g_malloc_base = 0;
28 char *g_malloc_base = 0;
32 #define FIXED_PRIMITIVES 1
41 #define NYACC_CAR nyacc_car
42 #define NYACC_CDR nyacc_cdr
46 //int ARENA_SIZE = 4000000;
47 int ARENA_SIZE = 100000000;
55 SCM g_continuations = 0;
67 enum type_t {TCHAR, TCLOSURE, TCONTINUATION, TFUNCTION, TKEYWORD, TMACRO, TNUMBER, TPAIR, TREF, TSPECIAL, TSTRING, TSYMBOL, TVALUES, TVECTOR, TBROKEN_HEART};
76 int (*function) (void);
81 //struct scm *g_cells = arena;
86 struct scm *g_cells = foobar;
90 //struct scm *g_news = 0;
92 struct scm scm_nil = {TSPECIAL, "()",0};
93 struct scm scm_f = {TSPECIAL, "#f",0};
94 struct scm scm_t = {TSPECIAL, "#t",0};
95 struct scm scm_dot = {TSPECIAL, ".",0};
96 struct scm scm_arrow = {TSPECIAL, "=>",0};
97 struct scm scm_undefined = {TSPECIAL, "*undefined*",0};
98 struct scm scm_unspecified = {TSPECIAL, "*unspecified*",0};
99 struct scm scm_closure = {TSPECIAL, "*closure*",0};
100 struct scm scm_circular = {TSPECIAL, "*circular*",0};
101 struct scm scm_begin = {TSPECIAL, "*begin*",0};
103 struct scm scm_symbol_dot = {TSYMBOL, "*dot*",0};
104 struct scm scm_symbol_lambda = {TSYMBOL, "lambda",0};
105 struct scm scm_symbol_begin = {TSYMBOL, "begin",0};
106 struct scm scm_symbol_if = {TSYMBOL, "if",0};
107 struct scm scm_symbol_quote = {TSYMBOL, "quote",0};
108 struct scm scm_symbol_set_x = {TSYMBOL, "set!",0};
110 struct scm scm_symbol_sc_expand = {TSYMBOL, "sc-expand",0};
111 struct scm scm_symbol_macro_expand = {TSYMBOL, "macro-expand",0};
112 struct scm scm_symbol_sc_expander_alist = {TSYMBOL, "*sc-expander-alist*",0};
114 struct scm scm_symbol_call_with_values = {TSYMBOL, "call-with-values",0};
115 struct scm scm_call_with_current_continuation = {TSPECIAL, "*call/cc*",0};
116 struct scm scm_symbol_call_with_current_continuation = {TSYMBOL, "call-with-current-continuation",0};
117 struct scm scm_symbol_current_module = {TSYMBOL, "current-module",0};
118 struct scm scm_symbol_primitive_load = {TSYMBOL, "primitive-load",0};
119 struct scm scm_symbol_read_input_file = {TSYMBOL, "read-input-file",0};
120 struct scm scm_symbol_write = {TSYMBOL, "write",0};
121 struct scm scm_symbol_display = {TSYMBOL, "display",0};
123 struct scm scm_symbol_throw = {TSYMBOL, "throw",0};
124 struct scm scm_symbol_not_a_pair = {TSYMBOL, "not-a-pair",0};
125 struct scm scm_symbol_system_error = {TSYMBOL, "system-error",0};
126 struct scm scm_symbol_wrong_number_of_args = {TSYMBOL, "wrong-number-of-args",0};
127 struct scm scm_symbol_wrong_type_arg = {TSYMBOL, "wrong-type-arg",0};
128 struct scm scm_symbol_unbound_variable = {TSYMBOL, "unbound-variable",0};
130 struct scm scm_symbol_argv = {TSYMBOL, "%argv",0};
131 struct scm scm_symbol_mes_prefix = {TSYMBOL, "%prefix",0};
132 struct scm scm_symbol_mes_version = {TSYMBOL, "%version",0};
134 struct scm scm_symbol_car = {TSYMBOL, "car",0};
135 struct scm scm_symbol_cdr = {TSYMBOL, "cdr",0};
136 struct scm scm_symbol_null_p = {TSYMBOL, "null?",0};
137 struct scm scm_symbol_eq_p = {TSYMBOL, "eq?",0};
138 struct scm scm_symbol_cons = {TSYMBOL, "cons",0};
140 struct scm scm_vm_evlis = {TSPECIAL, "*vm-evlis*",0};
141 struct scm scm_vm_evlis2 = {TSPECIAL, "*vm-evlis2*",0};
142 struct scm scm_vm_evlis3 = {TSPECIAL, "*vm-evlis3*",0};
143 struct scm scm_vm_apply = {TSPECIAL, "core:apply",0};
144 struct scm scm_vm_apply2 = {TSPECIAL, "*vm-apply2*",0};
145 struct scm scm_vm_eval = {TSPECIAL, "core:eval",0};
148 struct scm scm_vm_eval_car = {TSPECIAL, "*vm-eval-car*",0};
149 struct scm scm_vm_eval_cdr = {TSPECIAL, "*vm-eval-cdr*",0};
150 struct scm scm_vm_eval_cons = {TSPECIAL, "*vm-eval-cons*",0};
151 struct scm scm_vm_eval_null_p = {TSPECIAL, "*vm-eval-null-p*",0};
153 struct scm scm_vm_eval_set_x = {TSPECIAL, "*vm-eval-set!*",0};
154 struct scm scm_vm_eval_macro = {TSPECIAL, "*vm-eval-macro*",0};
155 struct scm scm_vm_eval2 = {TSPECIAL, "*vm-eval2*",0};
156 struct scm scm_vm_macro_expand = {TSPECIAL, "core:macro-expand",0};
157 struct scm scm_vm_begin = {TSPECIAL, "*vm-begin*",0};
158 struct scm scm_vm_begin_read_input_file = {TSPECIAL, "*vm-begin-read-input-file*",0};
159 struct scm scm_vm_begin2 = {TSPECIAL, "*vm-begin2*",0};
160 struct scm scm_vm_if = {TSPECIAL, "*vm-if*",0};
161 struct scm scm_vm_if_expr = {TSPECIAL, "*vm-if-expr*",0};
162 struct scm scm_vm_call_with_values2 = {TSPECIAL, "*vm-call-with-values2*",0};
163 struct scm scm_vm_call_with_current_continuation2 = {TSPECIAL, "*vm-call-with-current-continuation2*",0};
164 struct scm scm_vm_return = {TSPECIAL, "*vm-return*",0};
166 struct scm scm_test = {TSYMBOL, "test",0};
168 #include "mini-mes.symbols.h"
174 struct function g_functions[200];
179 #include "mini-mes.h"
180 // #include "posix.h"
181 // #include "reader.h"
184 #define TYPE(x) (g_cells[x].type)
186 #define CAR(x) g_cells[x].car
187 #define LENGTH(x) g_cells[x].car
188 #define STRING(x) g_cells[x].car
190 #define CDR(x) g_cells[x].cdr
191 #define CLOSURE(x) g_cells[x].cdr
192 #define CONTINUATION(x) g_cells[x].cdr
194 #define FUNCTION(x) g_functions[g_cells[x].cdr]
195 #define MACRO(x) g_cells[x].cdr
196 #define VALUE(x) g_cells[x].cdr
197 #define VECTOR(x) g_cells[x].cdr
199 #define MAKE_CHAR(n) make_cell (tmp_num_ (TCHAR), 0, tmp_num2_ (n))
200 #define MAKE_CONTINUATION(n) make_cell (tmp_num_ (TCONTINUATION), n, g_stack)
201 #define MAKE_NUMBER(n) make_cell (tmp_num_ (TNUMBER), 0, tmp_num2_ (n))
202 //#define MAKE_REF(n) make_cell (tmp_num_ (REF), n, 0)
205 #define CAAR(x) CAR (CAR (x))
206 #define CDAR(x) CDR (CAR (x))
207 #define CADAR(x) CAR (CDR (CAR (x)))
208 #define CADDR(x) CAR (CDR (CDR (x)))
209 // #define CDDDR(x) CDR (CDR (CDR (x)))
210 #define CDADAR(x) CAR (CDR (CAR (CDR (x))))
211 #define CADR(x) CAR (CDR (x))
213 #define MAKE_STRING(x) make_cell (tmp_num_ (TSTRING), x, 0)
220 assert (g_free + n < ARENA_SIZE);
230 make_cell (SCM type, SCM car, SCM cdr)
234 assert (TYPE (type) == TNUMBER);
236 TYPE (x) = VALUE (type);
237 if (VALUE (type) == TCHAR || VALUE (type) == TNUMBER) {
238 if (car) CAR (x) = CAR (car);
239 if (cdr) CDR(x) = CDR(cdr);
241 else if (VALUE (type) == TFUNCTION) {
242 if (car) CAR (x) = car;
243 if (cdr) CDR(x) = CDR(cdr);
262 VALUE (tmp_num2) = x;
269 VALUE (tmp_num) = TPAIR;
270 return make_cell (tmp_num, x, y);
280 if (TYPE (x) != TPAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_car));
292 if (TYPE (x) != TPAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_cdr));
298 list (SCM x) ///((arity . n))
306 return x == cell_nil ? cell_t : cell_f;
313 || ((TYPE (x) == TKEYWORD && TYPE (y) == TKEYWORD
314 && STRING (x) == STRING (y)))
315 || (TYPE (x) == TCHAR && TYPE (y) == TCHAR
316 && VALUE (x) == VALUE (y))
317 || (TYPE (x) == TNUMBER && TYPE (y) == TNUMBER
318 && VALUE (x) == VALUE (y)))
325 return MAKE_NUMBER (TYPE (x));
331 return (TYPE (x) != TCONTINUATION
332 && (TYPE (CAR (x)) == TPAIR // FIXME: this is weird
333 || TYPE (CAR (x)) == TREF
334 || TYPE (CAR (x)) == TSPECIAL
335 || TYPE (CAR (x)) == TSYMBOL
336 || TYPE (CAR (x)) == TSTRING)) ? CAR (x) : MAKE_NUMBER (CAR (x));
342 return (TYPE (CDR (x)) == TPAIR
343 || TYPE (CDR (x)) == TREF
344 || TYPE (CAR (x)) == TSPECIAL
345 || TYPE (CDR (x)) == TSYMBOL
346 || TYPE (CDR (x)) == TSTRING) ? CDR (x) : MAKE_NUMBER (CDR (x));
353 while (x != cell_nil)
356 if (TYPE (x) != TPAIR) return MAKE_NUMBER (-1);
359 return MAKE_NUMBER (n);
363 error (SCM key, SCM x)
366 if ((throw = assq_ref_env (cell_symbol_throw, r0)) != cell_undefined)
367 return apply (throw, cons (key, cons (x, cell_nil)), r0);
373 assert_defined (SCM x, SCM e) ///((internal))
375 if (e != cell_undefined) return e;
376 // error (cell_symbol_unbound_variable, x);
377 eputs ("unbound variable: ");
385 check_formals (SCM f, SCM formals, SCM args) ///((internal))
387 int flen = (TYPE (formals) == TNUMBER) ? VALUE (formals) : VALUE (length (formals));
388 int alen = VALUE (length (args));
389 if (alen != flen && alen != -1 && flen != -1)
393 char buf = "TODO:check_formals";
394 // sprintf (buf, "apply: wrong number of arguments; expected: %d, got: %d: ", flen, alen);
395 eputs ("apply: wrong number of arguments; expected: ");
401 SCM e = MAKE_STRING (cstring_to_list (buf));
402 return error (cell_symbol_wrong_number_of_args, cons (e, f));
404 return cell_unspecified;
408 check_apply (SCM f, SCM e) ///((internal))
410 //char const* type = 0;
412 if (f == cell_f || f == cell_t) type = "bool";
413 if (f == cell_nil) type = "nil";
414 if (f == cell_unspecified) type = "*unspecified*";
415 if (f == cell_undefined) type = "*undefined*";
416 if (TYPE (f) == TCHAR) type = "char";
417 if (TYPE (f) == TNUMBER) type = "number";
418 if (TYPE (f) == TSTRING) type = "string";
424 char buf = "TODO:check_apply";
425 // sprintf (buf, "cannot apply: %s:", type);
426 // fprintf (stderr, " [");
428 // fprintf (stderr, "]\n");
429 eputs ("cannot apply: ");
434 SCM e = MAKE_STRING (cstring_to_list (buf));
435 return error (cell_symbol_wrong_type_arg, cons (e, f));
437 return cell_unspecified;
441 gc_push_frame () ///((internal))
443 SCM frame = cons (r1, cons (r2, cons (r3, cons (r0, cell_nil))));
444 g_stack = cons (frame, g_stack);
449 apply (SCM f, SCM x, SCM a) ///((internal))
451 push_cc (cons (f, x), cell_unspecified, r0, cell_unspecified);
453 return eval_apply ();
457 append2 (SCM x, SCM y)
459 if (x == cell_nil) return y;
461 assert (TYPE (x) == TPAIR);
463 return cons (car (x), append2 (cdr (x), y));
467 pairlis (SCM x, SCM y, SCM a)
471 if (TYPE (x) != TPAIR)
472 return cons (cons (x, y), a);
473 return cons (cons (car (x), car (y)),
474 pairlis (cdr (x), cdr (y), a));
482 if ((FUNCTION (fn).arity > 0 || FUNCTION (fn).arity == -1)
483 && x != cell_nil && TYPE (CAR (x)) == TVALUES)
484 x = cons (CADAR (x), CDR (x));
485 if ((FUNCTION (fn).arity > 1 || FUNCTION (fn).arity == -1)
486 && x != cell_nil && TYPE (CDR (x)) == TPAIR && TYPE (CADR (x)) == TVALUES)
487 x = cons (CAR (x), cons (CDADAR (x), CDR (x)));
490 if (FUNCTION (fn).name) eputs (FUNCTION (fn).name);
491 else eputs (itoa (CDR (fn)));
494 switch (FUNCTION (fn).arity)
496 case 0: {return (FUNCTION (fn).function) ();}
497 case 1: {return ((SCM(*)(SCM))(FUNCTION (fn).function)) (car (x));}
498 case 2: {return ((SCM(*)(SCM,SCM))(FUNCTION (fn).function)) (car (x), cadr (x));}
499 case 3: {return ((SCM(*)(SCM,SCM,SCM))(FUNCTION (fn).function)) (car (x), cadr (x), car (cddr (x)));}
500 case -1: {return ((SCM(*)(SCM))(FUNCTION (fn).function)) (x);}
501 default: {return ((SCM(*)(SCM))(FUNCTION (fn).function)) (x);}
504 return cell_unspecified;
511 //while (a != cell_nil && eq_p (x, CAAR (a)) == cell_f) a = CDR (a);
512 while (a != cell_nil && x != CAAR (a)) a = CDR (a);
513 return a != cell_nil ? car (a) : cell_f;
517 assq_ref_env (SCM x, SCM a)
520 if (x == cell_f) return cell_undefined;
525 set_car_x (SCM x, SCM e)
528 assert (TYPE (x) == TPAIR);
531 return cell_unspecified;
535 set_cdr_x (SCM x, SCM e)
537 //if (TYPE (x) != TPAIR) error (cell_symbol_not_a_pair, cons (x, cell_set_cdr_x));
539 return cell_unspecified;
543 set_env_x (SCM x, SCM e, SCM a)
545 SCM p = assert_defined (x, assq (x, a));
546 //if (TYPE (p) != TPAIR) error (cell_symbol_not_a_pair, cons (p, x));
547 return set_cdr_x (p, e);
551 call_lambda (SCM e, SCM x, SCM aa, SCM a) ///((internal))
553 SCM cl = cons (cons (cell_closure, x), x);
554 cl = cons (cons (cell_closure, x), x);
557 return cell_unspecified;
561 make_closure (SCM args, SCM body, SCM a)
563 return make_cell (tmp_num_ (TCLOSURE), cell_f, cons (cons (cell_circular, a), cons (args, body)));
567 lookup_macro (SCM x, SCM a)
569 if (TYPE (x) != TSYMBOL) return cell_f;
570 SCM m = assq_ref_env (x, a);
572 if (TYPE (m) == TMACRO)
574 fputs ("XXmacro: ", 1);
583 if (TYPE (m) == TMACRO) return MACRO (m);
588 push_cc (SCM p1, SCM p2, SCM a, SCM c) ///((internal))
597 return cell_unspecified;
600 SCM caar (SCM x) {return car (car (x));}
601 SCM cadr (SCM x) {return car (cdr (x));}
602 SCM cdar (SCM x) {return cdr (car (x));}
603 SCM cddr (SCM x) {return cdr (cdr (x));}
605 SCM gc_pop_frame (); //((internal))
611 // if (g_free + GC_SAFETY > ARENA_SIZE)
612 // gc_pop_frame (gc (gc_push_frame ()));
616 case cell_vm_evlis: goto evlis;
617 case cell_vm_evlis2: goto evlis2;
618 case cell_vm_evlis3: goto evlis3;
619 case cell_vm_apply: goto apply;
620 case cell_vm_apply2: goto apply2;
621 case cell_vm_eval: goto eval;
623 case cell_vm_eval_car: goto eval_car;
624 case cell_vm_eval_cdr: goto eval_cdr;
625 case cell_vm_eval_cons: goto eval_cons;
626 case cell_vm_eval_null_p: goto eval_null_p;
628 case cell_vm_eval_set_x: goto eval_set_x;
629 case cell_vm_eval_macro: goto eval_macro;
630 case cell_vm_eval2: goto eval2;
631 case cell_vm_macro_expand: goto macro_expand;
632 case cell_vm_begin: goto begin;
633 ///case cell_vm_begin_read_input_file: goto begin_read_input_file;
634 case cell_vm_begin2: goto begin2;
635 case cell_vm_if: goto vm_if;
636 case cell_vm_if_expr: goto if_expr;
637 case cell_vm_call_with_current_continuation2: goto call_with_current_continuation2;
638 case cell_vm_call_with_values2: goto call_with_values2;
639 case cell_vm_return: goto vm_return;
640 case cell_unspecified: return r1;
647 if (r1 == cell_nil) goto vm_return;
648 if (TYPE (r1) != TPAIR) goto eval;
649 push_cc (car (r1), r1, r0, cell_vm_evlis2);
652 push_cc (cdr (r2), r1, r0, cell_vm_evlis3);
659 switch (TYPE (car (r1)))
662 check_formals (car (r1), MAKE_NUMBER (FUNCTION (car (r1)).arity), cdr (r1));
663 r1 = call (car (r1), cdr (r1)); /// FIXME: move into eval_apply
668 SCM cl = CLOSURE (car (r1));
669 SCM formals = cadr (cl);
670 SCM body = cddr (cl);
673 check_formals (car (r1), formals, cdr (r1));
674 SCM p = pairlis (formals, cdr (r1), aa);
675 call_lambda (body, p, aa, r0);
681 g_stack = CONTINUATION (CAR (r1));
692 push_cc (cons (CADR (r1), CADDR (r1)), r1, r0, cell_vm_return);
697 push_cc (CADR (r1), r1, CADDR (r1), cell_vm_return);
700 case cell_call_with_current_continuation:
703 goto call_with_current_continuation;
705 default: check_apply (cell_f, car (r1));
710 if (car (r1) == cell_symbol_call_with_values)
713 goto call_with_values;
715 if (car (r1) == cell_symbol_current_module)
726 case cell_symbol_lambda:
728 SCM formals = cadr (car (r1));
729 SCM body = cddr (car (r1));
730 SCM p = pairlis (formals, cdr (r1), r0);
731 check_formals (r1, formals, cdr (r1));
732 call_lambda (body, p, p, r0);
738 push_cc (car (r1), r1, r0, cell_vm_apply2);
741 check_apply (r1, car (r2));
742 r1 = cons (r1, cdr (r2));
753 case cell_symbol_car:
755 push_cc (CADR (r1), r1, r0, cell_vm_eval_car); goto eval;
757 x = r1; gc_pop_frame (); r1 = car (x); goto eval_apply;
759 case cell_symbol_cdr:
761 push_cc (CADR (r1), r1, r0, cell_vm_eval_cdr); goto eval;
763 x = r1; gc_pop_frame (); r1 = cdr (x); goto eval_apply;
765 case cell_symbol_cons: {
766 push_cc (CDR (r1), r1, r0, cell_vm_eval_cons); goto evlis;
770 r1 = cons (CAR (x), CADR (x));
773 case cell_symbol_null_p:
775 push_cc (CADR (r1), r1, r0, cell_vm_eval_null_p);
778 x = r1; gc_pop_frame (); r1 = null_p (x); goto eval_apply;
780 #endif // FIXED_PRIMITIVES
781 case cell_symbol_quote:
783 x = r1; gc_pop_frame (); r1 = cadr (x); goto eval_apply;
785 case cell_symbol_begin: goto begin;
786 case cell_symbol_lambda:
788 r1 = make_closure (cadr (r1), cddr (r1), assq (cell_closure, r0));
791 case cell_symbol_if: {r1=cdr (r1); goto vm_if;}
792 case cell_symbol_set_x:
794 push_cc (car (cddr (r1)), r1, r0, cell_vm_eval_set_x);
798 r1 = set_env_x (cadr (x), r1, r0);
801 case cell_vm_macro_expand:
803 push_cc (cadr (r1), r1, r0, cell_vm_return);
807 push_cc (r1, r1, r0, cell_vm_eval_macro);
813 if (TYPE (r1) == TPAIR)
815 set_cdr_x (r2, cdr (r1));
816 set_car_x (r2, car (r1));
820 push_cc (CDR (r1), r1, r0, cell_vm_eval2); goto evlis;
822 r1 = cons (car (r2), r1);
829 r1 = assert_defined (r1, assq_ref_env (r1, r0));
832 default: {goto vm_return;}
838 if (TYPE (r1) == TPAIR
839 && (macro = lookup_macro (car (r1), r0)) != cell_f)
841 r1 = cons (macro, CDR (r1));
852 else if (TYPE (r1) == TPAIR
853 && TYPE (CAR (r1)) == TSYMBOL
854 && ((expanders = assq_ref_env (cell_symbol_sc_expander_alist, r0)) != cell_undefined)
855 && ((macro = assq (CAR (r1), expanders)) != cell_f))
857 SCM sc_expand = assq_ref_env (cell_symbol_macro_expand, r0);
858 if (sc_expand != cell_undefined && sc_expand != cell_f)
860 r1 = cons (sc_expand, cons (r1, cell_nil));
866 x = cell_unspecified;
867 while (r1 != cell_nil) {
868 if (TYPE (r1) == TPAIR && TYPE (CAR (r1)) == TPAIR)
870 if (caar (r1) == cell_symbol_begin)
871 r1 = append2 (cdar (r1), cdr (r1));
872 else if (caar (r1) == cell_symbol_primitive_load)
874 push_cc (cons (cell_symbol_read_input_file, cell_nil), r1, r0, cell_vm_begin_read_input_file);
876 begin_read_input_file:
877 r1 = append2 (r1, cdr (r2));
880 if (CDR (r1) == cell_nil)
890 push_cc (CAR (r1), r1, r0, cell_vm_begin2);
900 push_cc (car (r1), r1, r0, cell_vm_if_expr);
910 if (cddr (r1) != cell_nil)
912 r1 = car (cddr (r1));
915 r1 = cell_unspecified;
918 call_with_current_continuation:
922 x = MAKE_CONTINUATION (g_continuations++);
924 x = MAKE_CONTINUATION (g_continuations);
928 push_cc (cons (car (r1), cons (x, cell_nil)), x, r0, cell_vm_call_with_current_continuation2);
930 call_with_current_continuation2:
931 CONTINUATION (r2) = g_stack;
935 push_cc (cons (car (r1), cell_nil), r1, r0, cell_vm_call_with_values2);
938 if (TYPE (r1) == TVALUES)
940 r1 = cons (cadr (r2), r1);
951 gc_peek_frame () ///((internal))
953 SCM frame = car (g_stack);
956 r3 = car (cddr (frame));
957 r0 = cadr (cddr (frame));
962 gc_pop_frame () ///((internal))
964 SCM frame = gc_peek_frame (g_stack);
965 g_stack = cdr (g_stack);
970 mes_g_stack (SCM a) ///((internal))
976 g_stack = cons (cell_nil, cell_nil);
980 //
\f Environment setup
982 make_tmps (struct scm* cells)
985 cells[tmp].type = TCHAR;
987 cells[tmp_num].type = TNUMBER;
989 cells[tmp_num2].type = TNUMBER;
996 VALUE (tmp_num) = TSYMBOL;
997 SCM x = make_cell (tmp_num, s, 0);
998 g_symbols = cons (x, g_symbols);
1003 list_of_char_equal_p (SCM a, SCM b)
1005 while (a != cell_nil && b != cell_nil && VALUE (car (a)) == VALUE (car (b))) {
1007 assert (TYPE (car (a)) == TCHAR);
1008 assert (TYPE (car (b)) == TCHAR);
1013 return (a == cell_nil && b == cell_nil) ? cell_t : cell_f;
1017 lookup_symbol_ (SCM s)
1021 //if (list_of_char_equal_p (STRING (car (x)), s) == cell_t) break;
1022 if (list_of_char_equal_p (STRING (car (x)), s) == cell_t) goto dun;
1033 SCM x = lookup_symbol_ (s);
1034 return x ? x : make_symbol_ (s);
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)))) {
1053 n += VALUE (car (p)) - '0';
1056 n = n + VALUE (car (p)) - '0';
1060 if (p == cell_nil) return MAKE_NUMBER (n * sign);
1063 SCM x = lookup_symbol_ (s);
1064 return x ? x : make_symbol_ (s);
1068 cstring_to_list (char const* s)
1075 p = cons (MAKE_CHAR (s[i]), p);
1082 acons (SCM key, SCM value, SCM alist)
1084 return cons (cons (key, value), alist);
1088 //
\f MINI_MES: temp-lib
1093 // return getc (g_stdin);
1099 return ungetc (c, g_stdin);
1113 return MAKE_NUMBER (peekchar ());
1119 return MAKE_NUMBER (getchar ());
1125 ungetchar (VALUE (i));
1130 write_byte (SCM x) ///((arity . n))
1135 if (TYPE (p) == TPAIR && TYPE (car (p)) == TNUMBER) fd = VALUE (car (p));
1136 //FILE *f = fd == 1 ? stdout : stderr;
1138 assert (TYPE (c) == TNUMBER || TYPE (c) == TCHAR);
1140 // fputc (VALUE (c), f);
1141 char cc = VALUE (c);
1142 write (1, (char*)&cc, fd);
1149 display_helper (SCM x, int cont, char* sep)
1152 if (g_depth == 0) return cell_unspecified;
1155 g_depth = g_depth - 1;
1157 // eputs ("<display>\n");
1162 //puts ("<char>\n");
1164 putchar (VALUE (x));
1169 puts ("#<procedure ");
1170 ///puts (FUNCTION (x).name ? FUNCTION (x).name : "?");
1172 if (FUNCTION (x).name != 0)
1173 p = FUNCTION (x).name;
1176 puts (itoa (CDR (x)));
1185 display_helper (cdr (x), cont, "");
1191 //puts ("<number>\n");
1192 puts (itoa (VALUE (x)));
1197 if (!cont) puts ("(");
1198 if (x && x != cell_nil) display_ (CAR (x));
1199 if (CDR (x) && TYPE (CDR (x)) == TPAIR)
1200 display_helper (CDR (x), 1, " ");
1201 else if (CDR (x) && CDR (x) != cell_nil)
1203 if (TYPE (CDR (x)) != TPAIR)
1207 if (!cont) puts (")");
1216 while (t && t != cell_nil)
1218 putchar (VALUE (CAR (t)));
1232 while (t && t != cell_nil)
1234 putchar (VALUE (CAR (t)));
1241 //puts ("<default>\n");
1243 puts (itoa (TYPE (x)));
1257 return display_helper (x, 0, "");
1265 gc_init_cells () ///((internal))
1268 //g_cells = (scm *)malloc (ARENA_SIZE);
1270 arena = (char*)malloc (ARENA_SIZE);
1273 p = malloc (ARENA_SIZE);
1278 //g_cells = (scm *)malloc (2*ARENA_SIZE*sizeof(scm));
1280 // #if __NYACC__ || FIXME_NYACC
1281 // TYPE (0) = TVECTOR;
1283 // // TYPE (0) = VECTOR;
1285 // LENGTH (0) = 1000;
1295 mes_symbols () ///((internal))
1300 #include "mini-mes.symbols.i"
1302 g_symbol_max = g_free;
1303 make_tmps (g_cells);
1306 for (int i=1; i<g_symbol_max; i++)
1307 g_symbols = cons (i, g_symbols);
1311 #include "mini-mes.symbol-names.i"
1313 a = acons (cell_symbol_mes_version, MAKE_STRING (cstring_to_list (VERSION)), a);
1314 a = acons (cell_symbol_mes_prefix, MAKE_STRING (cstring_to_list (PREFIX)), a);
1316 a = acons (cell_symbol_dot, cell_dot, a);
1317 a = acons (cell_symbol_begin, cell_begin, a);
1318 a = acons (cell_symbol_call_with_current_continuation, cell_call_with_current_continuation, a);
1319 a = acons (cell_symbol_sc_expand, cell_f, a);
1320 a = acons (cell_closure, a, a);
1326 mes_environment () ///((internal))
1330 a = mes_g_stack (a);
1335 mes_builtins (SCM a) ///((internal))
1337 #include "mini-mes.i"
1340 // #include "math.i"
1341 // #include "posix.i"
1342 // #include "reader.i"
1344 // #include "lib.environment.i"
1345 // #include "math.environment.i"
1346 #include "mini-mes.environment.i"
1347 // #include "posix.environment.i"
1348 // #include "reader.environment.i"
1354 bload_env (SCM a) ///((internal))
1356 char *mo = "module/mes/read-0-32.mo";
1357 g_stdin = open (mo, 0);
1358 if (g_stdin < 0) {eputs ("no such file: ");eputs (mo);eputs ("\n");return 1;}
1359 assert (getchar () == 'M');
1360 assert (getchar () == 'E');
1361 assert (getchar () == 'S');
1362 eputs ("*GOT MES*\n");
1363 g_stack = getchar () << 8;
1364 g_stack += getchar ();
1366 char *p = (char*)g_cells;
1373 g_free = (p-(char*)g_cells) / sizeof (struct scm);
1377 r0 = mes_builtins (r0);
1381 while (s && s != cell_nil) {
1387 puts ("functions: ");
1388 puts (itoa (g_function));
1390 for (int i = 0; i < g_function; i++)
1395 puts (g_functions[i].name);
1404 char string_to_cstring_buf[1024];
1406 string_to_cstring (SCM s)
1408 //static char buf[1024];
1410 char *p = string_to_cstring_buf;
1412 while (s != cell_nil)
1414 *p++ = VALUE (car (s));
1419 return string_to_cstring_buf;
1426 #if __NYACC__ || FIXME_NYACC
1427 if (TYPE (x) == TSTRING)
1429 // if (TYPE (x) == STRING)
1431 eputs (string_to_cstring (x));
1432 // else if ((write = assq_ref_env (cell_symbol_write, r0)) != cell_undefined)
1433 // apply (assq_ref_env (cell_symbol_display, r0), cons (x, cons (MAKE_NUMBER (2), cell_nil)), r0);
1434 #if __NYACC__ || FIXME_NYACC
1435 else if (TYPE (x) == TSPECIAL || TYPE (x) == TSTRING || TYPE (x) == TSYMBOL)
1437 // else if (TYPE (x) == SPECIAL || TYPE (x) == STRING || TYPE (x) == SYMBOL)
1439 eputs (string_to_cstring (x));
1440 else if (TYPE (x) == TNUMBER)
1441 eputs (itoa (VALUE (x)));
1443 eputs ("core:stderr: display undefined\n");
1444 return cell_unspecified;
1449 greater_p (SCM x) ///((name . ">") (arity . n))
1452 while (x != cell_nil)
1454 assert (TYPE (car (x)) == TNUMBER);
1455 if (VALUE (car (x)) >= n) return cell_f;
1456 n = VALUE (car (x));
1463 less_p (SCM x) ///((name . "<") (arity . n))
1466 while (x != cell_nil)
1468 assert (TYPE (car (x)) == TNUMBER);
1469 if (VALUE (car (x)) <= n) return cell_f;
1470 n = VALUE (car (x));
1477 main (int argc, char *argv[])
1479 eputs ("Hello mini-mes!\n");
1481 //g_debug = getenv ("MES_DEBUG");
1483 //if (getenv ("MES_ARENA")) ARENA_SIZE = atoi (getenv ("MES_ARENA"));
1484 if (argc > 1 && !strcmp (argv[1], "--help")) return eputs ("Usage: mes [--dump|--load] < FILE");
1486 if (argc > 1 && !strcmp (argv[1], "--version")) {eputs ("Mes ");return eputs (VERSION);};
1488 if (argc > 1 && !strcmp (argv[1], "--version")) {eputs ("Mes ");return eputs ("0.4");};
1492 r0 = mes_environment ();
1495 SCM program = bload_env (r0);
1497 SCM program = (argc > 1 && !strcmp (argv[1], "--load"))
1498 ? bload_env (r0) : load_env (r0);
1499 if (argc > 1 && !strcmp (argv[1], "--dump")) return dump ();
1502 push_cc (r2, cell_unspecified, r0, cell_unspecified);
1503 eputs ("program: ");
1516 eputs ("\nstats: [");
1517 eputs (itoa (g_free));