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mes/scaffold/cons-mes.c
Jan Nieuwenhuizen c33d6d00bc
mes: Run build-aux/indent.sh. 
* src/mes.c: Re-indent.
* src: Likewise.
* include: Likewise.
* lib: Likewise.
* scaffold: Likewise.
2019-05-18 13:27:42 +02:00

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/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2016,2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
* GNU Mes is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* GNU Mes is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#if WITH_GLIBC
#error "WITH_GLIBC not supported"
#endif
#include <stdio.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <mes/lib.h>
char arena[2000];
typedef int SCM;
int g_debug = 0;
int g_free = 0;
SCM g_continuations = 0;
SCM g_symbols = 0;
SCM g_stack = 0;
SCM r0 = 0; // a/env
SCM r1 = 0; // param 1
SCM r2 = 0; // save 2+load/dump
SCM r3 = 0; // continuation
enum type_t
{ TCHAR, TCLOSURE, TCONTINUATION, TFUNCTION, TKEYWORD, TMACRO, TNUMBER, TPAIR, TREF, TSPECIAL, TSTRING,
TSYMBOL, TVALUES, TVECTOR, TBROKEN_HEART };
struct scm
{
enum type_t type;
SCM car;
SCM cdr;
};
struct function
{
int (*function) (void);
int arity;
char *name;
};
#if __MESC__
struct scm *g_cells = arena;
#else
struct scm *g_cells = (struct scm *) arena;
#endif
#define cell_nil 1
#define cell_f 2
#define cell_t 3
#define cell_dot 4
// #define cell_arrow 5
#define cell_undefined 6
#define cell_unspecified 7
#define cell_closure 8
#define cell_circular 9
#define cell_begin 10
#define cell_symbol_dot 11
#define cell_symbol_lambda 12
#define cell_symbol_begin 13
#define cell_symbol_if 14
#define cell_symbol_quote 15
#define cell_symbol_set_x 16
#define cell_vm_apply 45
#define cell_vm_apply2 46
#define cell_vm_eval 47
#define cell_vm_begin 56
//#define cell_vm_begin_read_input_file 57
#define cell_vm_begin2 58
#define cell_vm_return 63
SCM tmp;
SCM tmp_num;
SCM tmp_num2;
int ARENA_SIZE = 200;
struct function g_functions[5];
int g_function = 0;
SCM make_cell_ (SCM type, SCM car, SCM cdr);
struct function fun_make_cell_ = { &make_cell_, 3, "core:make-cell" };
struct scm scm_make_cell_ = { TFUNCTION, 0, 0 };
//, "core:make-cell", 0};
SCM cell_make_cell_;
SCM cons (SCM x, SCM y);
struct function fun_cons = { &cons, 2, "cons" };
struct scm scm_cons = { TFUNCTION, 0, 0 };
// "cons", 0};
SCM cell_cons;
SCM car (SCM x);
struct function fun_car = { &car, 1, "car" };
struct scm scm_car = { TFUNCTION, 0, 0 };
// "car", 0};
SCM cell_car;
SCM cdr (SCM x);
struct function fun_cdr = { &cdr, 1, "cdr" };
struct scm scm_cdr = { TFUNCTION, 0, 0 };
// "cdr", 0};
SCM cell_cdr;
// SCM eq_p (SCM x, SCM y);
// struct function fun_eq_p = {&eq_p,2,"eq?"};
// scm scm_eq_p = {TFUNCTION,0,0};
// SCM cell_eq_p;
#define TYPE(x) (g_cells[x].type)
#define CAR(x) g_cells[x].car
#define LENGTH(x) g_cells[x].car
#define STRING(x) g_cells[x].car
#define CDR(x) g_cells[x].cdr
#define CONTINUATION(x) g_cells[x].cdr
#define FUNCTION(x) g_functions[g_cells[x].cdr]
#define VALUE(x) g_cells[x].cdr
#define VECTOR(x) g_cells[x].cdr
#define MAKE_CHAR(n) make_cell_ (tmp_num_ (TCHAR), 0, tmp_num2_ (n))
#define MAKE_NUMBER(n) make_cell_ (tmp_num_ (TNUMBER), 0, tmp_num2_ (n))
#define CAAR(x) CAR (CAR (x))
#define CADAR(x) CAR (CDR (CAR (x)))
#define CDADAR(x) CAR (CDR (CAR (CDR (x))))
#define CADR(x) CAR (CDR (x))
#define MAKE_STRING(x) make_cell_ (tmp_num_ (TSTRING), x, 0)
SCM
alloc (int n)
{
assert (g_free + n < ARENA_SIZE);
SCM x = g_free;
g_free += n;
return x;
}
SCM
make_cell_ (SCM type, SCM car, SCM cdr)
{
SCM x = alloc (1);
assert (TYPE (type) == TNUMBER);
TYPE (x) = VALUE (type);
if (VALUE (type) == TCHAR || VALUE (type) == TNUMBER)
{
if (car)
CAR (x) = CAR (car);
if (cdr)
CDR (x) = CDR (cdr);
}
else if (VALUE (type) == TFUNCTION)
{
if (car)
CAR (x) = car;
if (cdr)
CDR (x) = CDR (cdr);
}
else
{
CAR (x) = car;
CDR (x) = cdr;
}
return x;
}
SCM
tmp_num_ (int x)
{
VALUE (tmp_num) = x;
return tmp_num;
}
SCM
tmp_num2_ (int x)
{
VALUE (tmp_num2) = x;
return tmp_num2;
}
SCM
cons (SCM x, SCM y)
{
VALUE (tmp_num) = TPAIR;
return make_cell_ (tmp_num, x, y);
}
SCM
car (SCM x)
{
return CAR (x);
}
SCM
cdr (SCM x)
{
return CDR (x);
}
SCM
gc_push_frame ()
{
SCM frame = cons (r1, cons (r2, cons (r3, cons (r0, cell_nil))));
g_stack = cons (frame, g_stack);
return g_stack;
}
SCM
append2 (SCM x, SCM y)
{
if (x == cell_nil)
return y;
assert (TYPE (x) == TPAIR);
return cons (car (x), append2 (cdr (x), y));
}
SCM
pairlis (SCM x, SCM y, SCM a)
{
if (x == cell_nil)
return a;
if (TYPE (x) != TPAIR)
return cons (cons (x, y), a);
return cons (cons (car (x), car (y)), pairlis (cdr (x), cdr (y), a));
}
SCM
assq (SCM x, SCM a)
{
while (a != cell_nil && x == CAAR (a))
a = CDR (a);
return a != cell_nil ? car (a) : cell_f;
}
SCM
push_cc (SCM p1, SCM p2, SCM a, SCM c) ///((internal))
{
puts ("push cc\n");
SCM x = r3;
r3 = c;
r2 = p2;
gc_push_frame ();
r1 = p1;
r0 = a;
r3 = x;
return cell_unspecified;
}
SCM
caar (SCM x)
{
return car (car (x));
}
SCM
cadr (SCM x)
{
return car (cdr (x));
}
SCM
cdar (SCM x)
{
return cdr (car (x));
}
SCM
cddr (SCM x)
{
return cdr (cdr (x));
}
#if __GNUC__
//FIXME
SCM call (SCM, SCM);
SCM gc_pop_frame ();
#endif
SCM
eval_apply ()
{
eval_apply:
switch (r3)
{
case cell_vm_apply:
{
goto apply;
}
case cell_unspecified:
{
return r1;
}
}
SCM x = cell_nil;
SCM y = cell_nil;
apply:
switch (TYPE (car (r1)))
{
case TFUNCTION:
{
puts ("apply.function\n");
r1 = call (car (r1), cdr (r1));
goto vm_return;
}
}
vm_return:
x = r1;
gc_pop_frame ();
r1 = x;
goto eval_apply;
}
SCM
call (SCM fn, SCM x)
{
puts ("call\n");
if ((FUNCTION (fn).arity > 0 || FUNCTION (fn).arity == -1) && x != cell_nil && TYPE (CAR (x)) == TVALUES)
x = cons (CADAR (x), CDR (x));
if ((FUNCTION (fn).arity > 1 || FUNCTION (fn).arity == -1)
&& x != cell_nil && TYPE (CDR (x)) == TPAIR && TYPE (CADR (x)) == TVALUES)
x = cons (CAR (x), cons (CDADAR (x), CDR (x)));
switch (FUNCTION (fn).arity)
{
case 0:
{
return (FUNCTION (fn).function) ();
}
case 1:
{
return ((SCM (*)(SCM)) (FUNCTION (fn).function)) (car (x));
}
case 2:
{
return ((SCM (*)(SCM, SCM)) (FUNCTION (fn).function)) (car (x), cadr (x));
}
case 3:
{
return ((SCM (*)(SCM, SCM, SCM)) (FUNCTION (fn).function)) (car (x), cadr (x), car (cddr (x)));
}
case -1:
{
return ((SCM (*)(SCM)) (FUNCTION (fn).function)) (x);
}
}
return cell_unspecified;
}
SCM
gc_peek_frame ()
{
SCM frame = car (g_stack);
r1 = car (frame);
r2 = cadr (frame);
r3 = car (cddr (frame));
r0 = cadr (cddr (frame));
return frame;
}
SCM
gc_pop_frame ()
{
SCM frame = gc_peek_frame (g_stack);
g_stack = cdr (g_stack);
return frame;
}
SCM
mes_g_stack (SCM a) ///((internal))
{
r0 = a;
r1 = MAKE_CHAR (0);
r2 = MAKE_CHAR (0);
r3 = MAKE_CHAR (0);
g_stack = cons (cell_nil, cell_nil);
return r0;
}
// Environment setup
SCM
make_tmps (struct scm * cells)
{
tmp = g_free++;
cells[tmp].type = TCHAR;
tmp_num = g_free++;
cells[tmp_num].type = TNUMBER;
tmp_num2 = g_free++;
cells[tmp_num2].type = TNUMBER;
return 0;
}
SCM
make_symbol_ (SCM s)
{
VALUE (tmp_num) = TSYMBOL;
SCM x = make_cell_ (tmp_num, s, 0);
g_symbols = cons (x, g_symbols);
return x;
}
SCM
make_symbol (SCM s)
{
SCM x = 0;
return x ? x : make_symbol_ (s);
}
SCM
acons (SCM key, SCM value, SCM alist)
{
return cons (cons (key, value), alist);
}
// Jam Collector
SCM g_symbol_max;
SCM
gc_init_cells ()
{
return 0;
}
// INIT NEWS
SCM
mes_symbols () ///((internal))
{
gc_init_cells ();
// gc_init_news ();
#if __GNUC__ && 0
//#include "mes.symbols.i"
#else
g_free++;
// g_cells[cell_nil] = scm_nil;
g_free++;
// g_cells[cell_f] = scm_f;
g_free++;
// g_cells[cell_t] = scm_t;
g_free++;
// g_cells[cell_dot] = scm_dot;
g_free++;
// g_cells[cell_arrow] = scm_arrow;
g_free++;
// g_cells[cell_undefined] = scm_undefined;
g_free++;
// g_cells[cell_unspecified] = scm_unspecified;
g_free++;
// g_cells[cell_closure] = scm_closure;
g_free++;
// g_cells[cell_circular] = scm_circular;
g_free++;
// g_cells[cell_begin] = scm_begin;
///
g_free = 44;
g_free++;
// g_cells[cell_vm_apply] = scm_vm_apply;
g_free++;
// g_cells[cell_vm_apply2] = scm_vm_apply2;
g_free++;
// g_cells[cell_vm_eval] = scm_vm_eval;
///
g_free = 55;
g_free++;
// g_cells[cell_vm_begin] = scm_vm_begin;
g_free++;
// g_cells[cell_vm_begin_read_input_file] = scm_vm_begin_read_input_file;
g_free++;
// g_cells[cell_vm_begin2] = scm_vm_begin2;
///
g_free = 62;
g_free++;
// g_cells[cell_vm_return] = scm_vm_return;
#endif
g_symbol_max = g_free;
make_tmps (g_cells);
g_symbols = 0;
for (int i = 1; i < g_symbol_max; i++)
g_symbols = cons (i, g_symbols);
SCM a = cell_nil;
a = acons (cell_symbol_dot, cell_dot, a);
a = acons (cell_symbol_begin, cell_begin, a);
a = acons (cell_closure, a, a);
return a;
}
SCM
make_closure (SCM args, SCM body, SCM a)
{
return make_cell_ (tmp_num_ (TCLOSURE), cell_f, cons (cons (cell_circular, a), cons (args, body)));
}
SCM
mes_environment () ///((internal))
{
SCM a = 0;
a = mes_symbols ();
a = mes_g_stack (a);
return a;
}
SCM
mes_builtins (SCM a)
{
#if 0
//__GNUC__
//#include "mes.i"
// #include "lib.i"
// #include "math.i"
// #include "posix.i"
// #include "reader.i"
// #include "lib.environment.i"
// #include "math.environment.i"
// #include "mes.environment.i"
// #include "posix.environment.i"
// #include "reader.environment.i"
#else
scm_make_cell_.cdr = g_function;
g_functions[g_function++] = fun_make_cell_;
cell_make_cell_ = g_free++;
g_cells[cell_make_cell_] = scm_make_cell_;
scm_cons.cdr = g_function;
g_functions[g_function++] = fun_cons;
cell_cons = g_free++;
g_cells[cell_cons] = scm_cons;
scm_car.cdr = g_function;
g_functions[g_function++] = fun_car;
cell_car = g_free++;
g_cells[cell_car] = scm_car;
scm_cdr.cdr = g_function;
g_functions[g_function++] = fun_cdr;
cell_cdr = g_free++;
g_cells[cell_cdr] = scm_cdr;
#endif
return a;
}
SCM
bload_env (SCM a) ///((internal))
{
__stdin = open ("module/mes/read-0.mo", 0);
char *p = (char *) g_cells;
assert (getchar () == 'M');
assert (getchar () == 'E');
assert (getchar () == 'S');
g_stack = getchar () << 8;
g_stack += getchar ();
int c = getchar ();
while (c != EOF)
{
*p++ = c;
c = getchar ();
}
g_free = (p - (char *) g_cells) / sizeof (struct scm);
gc_peek_frame ();
g_symbols = r1;
__stdin = STDIN;
r0 = mes_builtins (r0);
return r2;
}
SCM
fill ()
{
TYPE (0) = 0x6c6c6168;
CAR (0) = 0x6a746f6f;
CDR (0) = 0x00002165;
TYPE (1) = TSYMBOL;
CAR (1) = 0x2d2d2d2d;
CDR (1) = 0x3e3e3e3e;
TYPE (9) = 0x2d2d2d2d;
CAR (9) = 0x2d2d2d2d;
CDR (9) = 0x3e3e3e3e;
// (cons 0 1)
TYPE (10) = TPAIR;
CAR (10) = 11;
CDR (10) = 12;
TYPE (11) = TFUNCTION;
CAR (11) = 0x58585858;
// 0 = make_cell_
// 1 = cons
// 2 = car
CDR (11) = 1;
TYPE (12) = TPAIR;
CAR (12) = 13;
//CDR (12) = 1;
CDR (12) = 14;
TYPE (13) = TNUMBER;
CAR (13) = 0x58585858;
CDR (13) = 0;
TYPE (14) = TPAIR;
CAR (14) = 15;
CDR (14) = 1;
TYPE (15) = TNUMBER;
CAR (15) = 0x58585858;
CDR (15) = 1;
return 0;
}
SCM
display_ (SCM x)
{
//puts ("<display>\n");
switch (TYPE (x))
{
case TCHAR:
{
//puts ("<char>\n");
puts ("#\\");
putchar (VALUE (x));
break;
}
case TFUNCTION:
{
//puts ("<function>\n");
if (VALUE (x) == 0)
puts ("core:make-cell");
if (VALUE (x) == 1)
puts ("cons");
if (VALUE (x) == 2)
puts ("car");
if (VALUE (x) == 3)
puts ("cdr");
break;
}
case TNUMBER:
{
//puts ("<number>\n");
#if __GNUC__
puts (itoa (VALUE (x)));
#else
int i;
i = VALUE (x);
i = i + 48;
putchar (i);
#endif
break;
}
case TPAIR:
{
//puts ("<pair>\n");
//if (cont != cell_f) puts "(");
puts ("(");
if (x && x != cell_nil)
display_ (CAR (x));
if (CDR (x) && CDR (x) != cell_nil)
{
#if __GNUC__
if (TYPE (CDR (x)) != TPAIR)
puts (" . ");
#else
int c;
c = CDR (x);
c = TYPE (c);
if (c != TPAIR)
puts (" . ");
#endif
display_ (CDR (x));
}
//if (cont != cell_f) puts (")");
puts (")");
break;
}
case TSPECIAL:
{
switch (x)
{
case 1:
{
puts ("()");
break;
}
case 2:
{
puts ("#f");
break;
}
case 3:
{
puts ("#t");
break;
}
default:
{
#if __GNUC__
puts ("<x:");
puts (itoa (x));
puts (">");
#else
puts ("<x>");
#endif
}
}
break;
}
case TSYMBOL:
{
switch (x)
{
case 11:
{
puts (" . ");
break;
}
case 12:
{
puts ("lambda");
break;
}
case 13:
{
puts ("begin");
break;
}
case 14:
{
puts ("if");
break;
}
case 15:
{
puts ("quote");
break;
}
case 37:
{
puts ("car");
break;
}
case 38:
{
puts ("cdr");
break;
}
case 39:
{
puts ("null?");
break;
}
case 40:
{
puts ("eq?");
break;
}
case 41:
{
puts ("cons");
break;
}
default:
{
#if __GNUC__
puts ("<s:");
puts (itoa (x));
puts (">");
#else
puts ("<s>");
#endif
}
}
break;
}
default:
{
//puts ("<default>\n");
#if __GNUC__
puts ("<");
puts (itoa (TYPE (x)));
puts (":");
puts (itoa (x));
puts (">");
#else
puts ("_");
#endif
break;
}
}
return 0;
}
SCM
simple_bload_env (SCM a) ///((internal))
{
puts ("reading: ");
char *mo = "module/mes/tiny-0-32.mo";
puts (mo);
puts ("\n");
__stdin = open (mo, 0);
if (__stdin < 0)
{
eputs ("no such file: module/mes/tiny-0-32.mo\n");
return 1;
}
char *p = (char *) g_cells;
int c;
assert (getchar () == 'M');
assert (getchar () == 'E');
assert (getchar () == 'S');
puts (" *GOT MES*\n");
g_stack = getchar () << 8;
g_stack += getchar ();
puts ("stack: ");
puts (itoa (g_stack));
puts ("\n");
c = getchar ();
while (c != -1)
{
*p++ = c;
c = getchar ();
}
puts ("read done\n");
g_free = (p - (char *) g_cells) / sizeof (struct scm);
if (g_free != 15)
exit (33);
g_symbols = 1;
__stdin = STDIN;
r0 = mes_builtins (r0);
if (g_free != 19)
exit (34);
puts ("cells read: ");
puts (itoa (g_free));
puts ("\n");
puts ("symbols: ");
puts (itoa (g_symbols));
puts ("\n");
// display_ (g_symbols);
// puts ("\n");
display_ (10);
puts ("\n");
fill ();
r2 = 10;
if (TYPE (12) != TPAIR)
exit (33);
puts ("program[");
puts (itoa (r2));
puts ("]: ");
display_ (r2);
//display_ (14);
puts ("\n");
r0 = 1;
//r2 = 10;
return r2;
}
int
main (int argc, char *argv[])
{
puts ("Hello cons-mes!\n");
if (argc > 1 && !strcmp (argv[1], "--help"))
return eputs ("Usage: mes [--dump|--load] < FILE");
#if __GNUC__
if (argc > 1 && !strcmp (argv[1], "--version"))
{
eputs ("Mes ");
return eputs (VERSION);
};
#else
if (argc > 1 && !strcmp (argv[1], "--version"))
{
eputs ("Mes ");
return eputs ("0.4");
};
#endif
__stdin = STDIN;
r0 = mes_environment ();
SCM program = simple_bload_env (r0);
puts ("g_free=");
puts (itoa (g_free));
puts ("\n");
push_cc (r2, cell_unspecified, r0, cell_unspecified);
puts ("g_free=");
puts (itoa (g_free));
puts ("\n");
puts ("g_stack=");
puts (itoa (g_stack));
puts ("\n");
puts ("r0=");
puts (itoa (r0));
puts ("\n");
puts ("r1=");
puts (itoa (r1));
puts ("\n");
puts ("r2=");
puts (itoa (r2));
puts ("\n");
puts ("r3=");
puts (itoa (r3));
puts ("\n");
r3 = cell_vm_apply;
r1 = eval_apply ();
display_ (r1);
eputs ("\n");
return 0;
}
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