373 lines
7.0 KiB
C
373 lines
7.0 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017 Jan Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of Mes.
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*
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* Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#if __GNUC__
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#include "mlibc.c"
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#endif
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#define assert(x) ((x) ? (void)0 : assert_fail (#x))
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#define MES_MINI 1
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#if __GNUC__
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#define FIXME_NYACC 1
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#define __NYACC__ 0
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#define NYACC_CAR
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#define NYACC_CDR
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#else
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#define __NYACC__ 1
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#define NYACC_CAR nyacc_car
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#define NYACC_CDR nyacc_cdr
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#endif
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char arena[200];
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typedef int SCM;
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#if __GNUC__
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int g_debug = 0;
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#endif
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int g_free = 0;
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SCM g_symbols = 0;
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SCM g_stack = 0;
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SCM r0 = 0; // a/env
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SCM r1 = 0; // param 1
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SCM r2 = 0; // save 2+load/dump
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SCM r3 = 0; // continuation
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#if __NYACC__ || FIXME_NYACC
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enum type_t {CHAR, CLOSURE, CONTINUATION, TFUNCTION, KEYWORD, MACRO, NUMBER, PAIR, REF, SPECIAL, TSTRING, SYMBOL, VALUES, TVECTOR, BROKEN_HEART};
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#else
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enum type_t {CHAR, CLOSURE, CONTINUATION, FUNCTION, KEYWORD, MACRO, NUMBER, PAIR, REF, SPECIAL, STRING, SYMBOL, VALUES, VECTOR, BROKEN_HEART};
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#endif
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struct scm {
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enum type_t type;
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SCM car;
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SCM cdr;
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};
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//char arena[200];
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//struct scm *g_cells = arena;
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//struct scm *g_cells = (struct scm*)arena;
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struct scm *g_cells = arena;
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#define cell_nil 1
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#define cell_f 2
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#define cell_t 3
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#define TYPE(x) (g_cells[x].type)
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#define CAR(x) g_cells[x].car
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#define CDR(x) g_cells[x].cdr
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//#define VALUE(x) g_cells[x].value
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#define VALUE(x) g_cells[x].cdr
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SCM
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car (SCM x)
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{
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#if MES_MINI
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//Nyacc
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//assert ("!car");
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#else
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if (TYPE (x) != PAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_car));
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#endif
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return CAR (x);
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}
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SCM
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cdr (SCM x)
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{
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#if MES_MINI
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//Nyacc
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//assert ("!cdr");
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#else
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if (TYPE (x) != PAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_cdr));
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#endif
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return CDR(x);
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}
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SCM caar (SCM x) {return car (car (x));}
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SCM cadr (SCM x) {return car (cdr (x));}
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SCM cdar (SCM x) {return cdr (car (x));}
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SCM cddr (SCM x) {return cdr (cdr (x));}
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SCM
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gc_peek_frame ()
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{
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SCM frame = car (g_stack);
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r1 = car (frame);
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r2 = cadr (frame);
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r3 = car (cddr (frame));
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r0 = cadr (cddr (frame));
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return frame;
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}
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// Environment setup
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SCM
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mes_environment ()
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{
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return 0;
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}
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SCM
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mes_builtins (SCM a)
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{
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return a;
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}
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SCM
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fill ()
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{
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TYPE (0) = 0x6c6c6168;
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CAR (0) = 0x6a746f6f;
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CDR (0) = 0x00002165;
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TYPE (1) = SYMBOL;
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CAR (1) = 0x2d2d2d2d;
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CDR (1) = 0x3e3e3e3e;
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TYPE (9) = 0x2d2d2d2d;
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CAR (9) = 0x2d2d2d2d;
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CDR (9) = 0x3e3e3e3e;
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// (A(B))
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TYPE (10) = PAIR;
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CAR (10) = 11;
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CDR (10) = 12;
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TYPE (11) = CHAR;
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CAR (11) = 0x58585858;
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CDR (11) = 89;
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TYPE (12) = PAIR;
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CAR (12) = 13;
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CDR (12) = 1;
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TYPE (13) = CHAR;
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CAR (11) = 0x58585858;
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CDR (13) = 90;
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TYPE (14) = 0x58585858;
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CAR (14) = 0x58585858;
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CDR (14) = 0x58585858;
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TYPE (14) = 0x58585858;
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CAR (14) = 0x58585858;
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CDR (14) = 0x58585858;
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TYPE (16) = 0x3c3c3c3c;
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CAR (16) = 0x2d2d2d2d;
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CDR (16) = 0x2d2d2d2d;
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return 0;
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}
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SCM
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display_ (SCM x)
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{
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//puts ("<display>\n");
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switch (TYPE (x))
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{
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case CHAR:
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{
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//puts ("<char>\n");
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puts ("#\\");
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putchar (VALUE (x));
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break;
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}
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case TFUNCTION:
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{
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//puts ("<function>\n");
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if (VALUE (x) == 0)
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puts ("make-cell");
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if (VALUE (x) == 1)
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puts ("cons");
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if (VALUE (x) == 2)
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puts ("car");
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if (VALUE (x) == 3)
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puts ("cdr");
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break;
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}
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case NUMBER:
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{
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//puts ("<number>\n");
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#if __GNUC__
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puts (itoa (VALUE (x)));
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#else
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int i;
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i = VALUE (x);
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i = i + 48;
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putchar (i);
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#endif
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break;
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}
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case PAIR:
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{
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//puts ("<pair>\n");
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//if (cont != cell_f) puts "(");
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puts ("(");
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if (x && x != cell_nil) display_ (CAR (x));
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if (CDR (x) && CDR (x) != cell_nil)
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{
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#if __GNUC__
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if (TYPE (CDR (x)) != PAIR)
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puts (" . ");
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#else
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int c;
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c = CDR (x);
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c = TYPE (c);
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if (c != PAIR)
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puts (" . ");
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#endif
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display_ (CDR (x));
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}
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//if (cont != cell_f) puts (")");
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puts (")");
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break;
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}
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case SPECIAL:
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{
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switch (x)
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{
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case 1: {puts ("()"); break;}
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case 2: {puts ("#f"); break;}
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case 3: {puts ("#t"); break;}
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default:
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{
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#if __GNUC__
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puts ("<x:");
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puts (itoa (x));
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puts (">");
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#else
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puts ("<x>");
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#endif
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}
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}
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break;
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}
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case SYMBOL:
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{
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switch (x)
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{
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case 11: {puts (" . "); break;}
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case 12: {puts ("lambda"); break;}
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case 13: {puts ("begin"); break;}
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case 14: {puts ("if"); break;}
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case 15: {puts ("quote"); break;}
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case 37: {puts ("car"); break;}
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case 38: {puts ("cdr"); break;}
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case 39: {puts ("null?"); break;}
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case 40: {puts ("eq?"); break;}
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case 41: {puts ("cons"); break;}
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default:
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{
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#if __GNUC__
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puts ("<s:");
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puts (itoa (x));
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puts (">");
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#else
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puts ("<s>");
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#endif
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}
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}
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break;
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}
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default:
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{
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//puts ("<default>\n");
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#if __GNUC__
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puts ("<");
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puts (itoa (TYPE (x)));
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puts (":");
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puts (itoa (x));
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puts (">");
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#else
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puts ("_");
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#endif
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break;
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}
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}
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return 0;
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}
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SCM
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bload_env (SCM a) ///((internal))
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{
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puts ("reading: ");
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char *mo = "module/mes/tiny-0-32.mo";
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puts (mo);
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puts ("\n");
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g_stdin = open (mo, 0);
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if (g_stdin < 0) {eputs ("no such file: module/mes/tiny-0-32.mo\n");return 1;}
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// BOOM
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//char *p = arena;
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char *p = (char*)g_cells;
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int c;
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c = getchar ();
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putchar (c);
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if (c != 'M') exit (10);
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c = getchar ();
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putchar (c);
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if (c != 'E') exit (11);
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c = getchar ();
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putchar (c);
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if (c != 'S') exit (12);
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puts (" *GOT MES*\n");
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// skip stack
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getchar ();
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getchar ();
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c = getchar ();
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while (c != -1)
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{
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*p++ = c;
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c = getchar ();
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}
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puts ("read done\n");
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display_ (10);
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puts ("\n");
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return r2;
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}
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int
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main (int argc, char *argv[])
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{
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fill ();
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char *p = arena;
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puts (p);
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puts ("\n");
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display_ (10);
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puts ("\n");
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SCM program = bload_env (r0);
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return 0;
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}
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#if __GNUC__
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#include "mstart.c"
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#endif
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