mes/scaffold/mini-mes.c

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/* -*-comment-start: "//";comment-end:""-*-
* Mes --- Maxwell Equations of Software
* Copyright © 2016,2017 Jan Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of Mes.
*
* 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.
*
* 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 Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#if __GNUC__
#include "mlibc.c"
#endif
#define assert(x) ((x) ? (void)0 : assert_fail (#x))
#define MES_MINI 1
#define FIXED_PRIMITIVES 1
//int ARENA_SIZE = 4000000;
int ARENA_SIZE = 1000000000;
char *arena = 0;
typedef int SCM;
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int g_debug = 0;
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int g_free = 0;
SCM g_continuations = 0;
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SCM g_symbols = 0;
SCM g_stack = 0;
// a/env
SCM r0 = 0;
// param 1
SCM r1 = 0;
// save 2+load/dump
SCM r2 = 0;
// continuation
SCM r3 = 0;
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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 __GNUC__
struct scm *g_cells = 0;
//struct scm *g_news = 0;
#else
int *foobar = 0;
struct scm *g_cells = foobar;
//struct scm *g_news = foobar;
#endif
struct scm scm_nil = {TSPECIAL, "()",0};
struct scm scm_f = {TSPECIAL, "#f",0};
struct scm scm_t = {TSPECIAL, "#t",0};
struct scm scm_dot = {TSPECIAL, ".",0};
struct scm scm_arrow = {TSPECIAL, "=>",0};
struct scm scm_undefined = {TSPECIAL, "*undefined*",0};
struct scm scm_unspecified = {TSPECIAL, "*unspecified*",0};
struct scm scm_closure = {TSPECIAL, "*closure*",0};
struct scm scm_circular = {TSPECIAL, "*circular*",0};
struct scm scm_begin = {TSPECIAL, "*begin*",0};
struct scm scm_symbol_dot = {TSYMBOL, "*dot*",0};
struct scm scm_symbol_lambda = {TSYMBOL, "lambda",0};
struct scm scm_symbol_begin = {TSYMBOL, "begin",0};
struct scm scm_symbol_if = {TSYMBOL, "if",0};
struct scm scm_symbol_quote = {TSYMBOL, "quote",0};
struct scm scm_symbol_set_x = {TSYMBOL, "set!",0};
struct scm scm_symbol_sc_expand = {TSYMBOL, "sc-expand",0};
struct scm scm_symbol_macro_expand = {TSYMBOL, "macro-expand",0};
struct scm scm_symbol_sc_expander_alist = {TSYMBOL, "*sc-expander-alist*",0};
struct scm scm_symbol_call_with_values = {TSYMBOL, "call-with-values",0};
struct scm scm_call_with_current_continuation = {TSPECIAL, "*call/cc*",0};
struct scm scm_symbol_call_with_current_continuation = {TSYMBOL, "call-with-current-continuation",0};
struct scm scm_symbol_current_module = {TSYMBOL, "current-module",0};
struct scm scm_symbol_primitive_load = {TSYMBOL, "primitive-load",0};
struct scm scm_symbol_read_input_file = {TSYMBOL, "read-input-file",0};
struct scm scm_symbol_write = {TSYMBOL, "write",0};
struct scm scm_symbol_display = {TSYMBOL, "display",0};
struct scm scm_symbol_throw = {TSYMBOL, "throw",0};
struct scm scm_symbol_not_a_pair = {TSYMBOL, "not-a-pair",0};
struct scm scm_symbol_system_error = {TSYMBOL, "system-error",0};
struct scm scm_symbol_wrong_number_of_args = {TSYMBOL, "wrong-number-of-args",0};
struct scm scm_symbol_wrong_type_arg = {TSYMBOL, "wrong-type-arg",0};
struct scm scm_symbol_unbound_variable = {TSYMBOL, "unbound-variable",0};
struct scm scm_symbol_argv = {TSYMBOL, "%argv",0};
struct scm scm_symbol_mes_prefix = {TSYMBOL, "%prefix",0};
struct scm scm_symbol_mes_version = {TSYMBOL, "%version",0};
struct scm scm_symbol_car = {TSYMBOL, "car",0};
struct scm scm_symbol_cdr = {TSYMBOL, "cdr",0};
struct scm scm_symbol_null_p = {TSYMBOL, "null?",0};
struct scm scm_symbol_eq_p = {TSYMBOL, "eq?",0};
struct scm scm_symbol_cons = {TSYMBOL, "cons",0};
struct scm scm_vm_evlis = {TSPECIAL, "*vm-evlis*",0};
struct scm scm_vm_evlis2 = {TSPECIAL, "*vm-evlis2*",0};
struct scm scm_vm_evlis3 = {TSPECIAL, "*vm-evlis3*",0};
struct scm scm_vm_apply = {TSPECIAL, "core:apply",0};
struct scm scm_vm_apply2 = {TSPECIAL, "*vm-apply2*",0};
struct scm scm_vm_eval = {TSPECIAL, "core:eval",0};
//FIXED_PRIMITIVES
struct scm scm_vm_eval_car = {TSPECIAL, "*vm-eval-car*",0};
struct scm scm_vm_eval_cdr = {TSPECIAL, "*vm-eval-cdr*",0};
struct scm scm_vm_eval_cons = {TSPECIAL, "*vm-eval-cons*",0};
struct scm scm_vm_eval_null_p = {TSPECIAL, "*vm-eval-null-p*",0};
struct scm scm_vm_eval_set_x = {TSPECIAL, "*vm-eval-set!*",0};
struct scm scm_vm_eval_macro = {TSPECIAL, "*vm-eval-macro*",0};
struct scm scm_vm_eval2 = {TSPECIAL, "*vm-eval2*",0};
struct scm scm_vm_macro_expand = {TSPECIAL, "core:macro-expand",0};
struct scm scm_vm_begin = {TSPECIAL, "*vm-begin*",0};
struct scm scm_vm_begin_read_input_file = {TSPECIAL, "*vm-begin-read-input-file*",0};
struct scm scm_vm_begin2 = {TSPECIAL, "*vm-begin2*",0};
struct scm scm_vm_if = {TSPECIAL, "*vm-if*",0};
struct scm scm_vm_if_expr = {TSPECIAL, "*vm-if-expr*",0};
struct scm scm_vm_call_with_values2 = {TSPECIAL, "*vm-call-with-values2*",0};
struct scm scm_vm_call_with_current_continuation2 = {TSPECIAL, "*vm-call-with-current-continuation2*",0};
struct scm scm_vm_return = {TSPECIAL, "*vm-return*",0};
struct scm scm_symbol_gnuc = {TSYMBOL, "%gnuc",0};
struct scm scm_symbol_mesc = {TSYMBOL, "%mesc",0};
struct scm scm_test = {TSYMBOL, "test",0};
#include "mini-mes.symbols.h"
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SCM tmp;
SCM tmp_num;
SCM tmp_num2;
struct function g_functions[200];
int g_function = 0;
// #include "lib.h"
// #include "math.h"
#include "mini-mes.h"
// #include "posix.h"
// #include "reader.h"
#include "vector.h"
#define TYPE(x) (g_cells[x].type)
#define CAR(x) g_cells[x].car
#define LENGTH(x) g_cells[x].car
#define REF(x) g_cells[x].car
#define STRING(x) g_cells[x].car
#define CDR(x) g_cells[x].cdr
#define CLOSURE(x) g_cells[x].cdr
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#define CONTINUATION(x) g_cells[x].cdr
#define FUNCTION(x) g_functions[g_cells[x].cdr]
#define MACRO(x) 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_CONTINUATION(n) make_cell_ (tmp_num_ (TCONTINUATION), n, g_stack)
#define MAKE_NUMBER(n) make_cell_ (tmp_num_ (TNUMBER), 0, tmp_num2_ (n))
#define MAKE_REF(n) make_cell_ (tmp_num_ (TREF), n, 0)
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#define CAAR(x) CAR (CAR (x))
#define CADR(x) CAR (CDR (x))
#define CDAR(x) CDR (CAR (x))
#define CDDR(x) CDR (CDR (x))
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#define CADAR(x) CAR (CDR (CAR (x)))
#define CADDR(x) CAR (CDR (CDR (x)))
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#define CDADAR(x) CAR (CDR (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;
}
#define DEBUG 0
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
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
make_symbol_ (SCM s) ///((internal))
{
VALUE (tmp_num) = TSYMBOL;
SCM x = make_cell_ (tmp_num, s, 0);
g_symbols = cons (x, g_symbols);
return x;
}
SCM
lookup_symbol_ (SCM s)
{
SCM x = g_symbols;
while (x) {
//if (list_of_char_equal_p (STRING (car (x)), s) == cell_t) break;
if (list_of_char_equal_p (STRING (car (x)), s) == cell_t) goto dun;
x = cdr (x);
}
dun:
if (x) x = car (x);
if (!x) x = make_symbol_ (s);
return x;
}
SCM
list_of_char_equal_p (SCM a, SCM b) ///((internal))
{
while (a != cell_nil && b != cell_nil && VALUE (car (a)) == VALUE (car (b))) {
assert (TYPE (car (a)) == TCHAR);
assert (TYPE (car (b)) == TCHAR);
a = cdr (a);
b = cdr (b);
}
return (a == cell_nil && b == cell_nil) ? cell_t : cell_f;
}
SCM
type_ (SCM x)
{
return MAKE_NUMBER (TYPE (x));
}
SCM
car_ (SCM x)
{
return (TYPE (x) != TCONTINUATION
&& (TYPE (CAR (x)) == TPAIR // FIXME: this is weird
|| TYPE (CAR (x)) == TREF
|| TYPE (CAR (x)) == TSPECIAL
|| TYPE (CAR (x)) == TSYMBOL
|| TYPE (CAR (x)) == TSTRING)) ? CAR (x) : MAKE_NUMBER (CAR (x));
}
SCM
cdr_ (SCM x)
{
return (TYPE (CDR (x)) == TPAIR
|| TYPE (CDR (x)) == TREF
|| TYPE (CAR (x)) == TSPECIAL
|| TYPE (CDR (x)) == TSYMBOL
|| TYPE (CDR (x)) == TSTRING) ? CDR (x) : MAKE_NUMBER (CDR (x));
}
SCM
arity_ (SCM x)
{
assert (TYPE (x) == TFUNCTION);
return MAKE_NUMBER (FUNCTION (x).arity);
}
SCM
cons (SCM x, SCM y)
{
VALUE (tmp_num) = TPAIR;
return make_cell_ (tmp_num, x, y);
}
SCM
car (SCM x)
{
#if MES_MINI
//Nyacc
//assert ("!car");
#else
if (TYPE (x) != TPAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_car));
#endif
return CAR (x);
}
SCM
cdr (SCM x)
{
#if MES_MINI
//Nyacc
//assert ("!cdr");
#else
if (TYPE (x) != TPAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_cdr));
#endif
return CDR(x);
}
SCM
list (SCM x) ///((arity . n))
{
return x;
}
SCM
null_p (SCM x)
{
return x == cell_nil ? cell_t : cell_f;
}
SCM
eq_p (SCM x, SCM y)
{
return (x == y
|| ((TYPE (x) == TKEYWORD && TYPE (y) == TKEYWORD
&& STRING (x) == STRING (y)))
|| (TYPE (x) == TCHAR && TYPE (y) == TCHAR
&& VALUE (x) == VALUE (y))
|| (TYPE (x) == TNUMBER && TYPE (y) == TNUMBER
&& VALUE (x) == VALUE (y)))
? cell_t : cell_f;
}
SCM
values (SCM x) ///((arity . n))
{
SCM v = cons (0, x);
TYPE (v) = TVALUES;
return v;
}
SCM
acons (SCM key, SCM value, SCM alist)
{
return cons (cons (key, value), alist);
}
SCM
length (SCM x)
{
int n = 0;
while (x != cell_nil)
{
n++;
if (TYPE (x) != TPAIR) return MAKE_NUMBER (-1);
x = cdr (x);
}
return MAKE_NUMBER (n);
}
SCM
error (SCM key, SCM x)
{
SCM throw;
if ((throw = assq_ref_env (cell_symbol_throw, r0)) != cell_undefined)
return apply (throw, cons (key, cons (x, cell_nil)), r0);
display_ (key);
puts (": ");
display_ (x);
assert (0);
}
SCM
assert_defined (SCM x, SCM e) ///((internal))
{
if (e != cell_undefined) return e;
// error (cell_symbol_unbound_variable, x);
eputs ("unbound variable: ");
display_error_ (x);
eputs ("\n");
exit (33);
return e;
}
SCM
cstring_to_list (char const* s)
{
char *x = s;
SCM p = cell_nil;
int i = strlen (s);
while (i--)
{
p = cons (MAKE_CHAR (s[i]), p);
x++;
}
return p;
}
SCM
check_formals (SCM f, SCM formals, SCM args) ///((internal))
{
int flen = (TYPE (formals) == TNUMBER) ? VALUE (formals) : VALUE (length (formals));
int alen = VALUE (length (args));
if (alen != flen && alen != -1 && flen != -1)
{
// FIXME
//char buf[1024];
char buf = "TODO:check_formals";
// sprintf (buf, "apply: wrong number of arguments; expected: %d, got: %d: ", flen, alen);
eputs ("apply: wrong number of arguments; expected: ");
eputs (itoa (flen));
eputs (", got: ");
eputs (itoa (alen));
eputs ("\n");
display_error_ (f);
SCM e = MAKE_STRING (cstring_to_list (buf));
return error (cell_symbol_wrong_number_of_args, cons (e, f));
}
return cell_unspecified;
}
SCM
check_apply (SCM f, SCM e) ///((internal))
{
//char const* type = 0;
char* type = 0;
if (f == cell_f || f == cell_t) type = "bool";
if (f == cell_nil) type = "nil";
if (f == cell_unspecified) type = "*unspecified*";
if (f == cell_undefined) type = "*undefined*";
if (TYPE (f) == TCHAR) type = "char";
if (TYPE (f) == TNUMBER) type = "number";
if (TYPE (f) == TSTRING) type = "string";
if (type)
{
//FIXME
//char buf[1024];
char buf = "TODO:check_apply";
// sprintf (buf, "cannot apply: %s:", type);
// fprintf (stderr, " [");
// display_error_ (e);
// fprintf (stderr, "]\n");
eputs ("cannot apply: ");
eputs (type);
eputs ("[");
display_error_ (e);
eputs ("]\n");
SCM e = MAKE_STRING (cstring_to_list (buf));
return error (cell_symbol_wrong_type_arg, cons (e, f));
}
return cell_unspecified;
}
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SCM
gc_push_frame () ///((internal))
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{
SCM frame = cons (r1, cons (r2, cons (r3, cons (r0, cell_nil))));
g_stack = cons (frame, g_stack);
return g_stack;
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}
SCM
apply (SCM f, SCM x, SCM a) ///((internal))
{
push_cc (cons (f, x), cell_unspecified, r0, cell_unspecified);
r3 = cell_vm_apply;
return eval_apply ();
}
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SCM
append2 (SCM x, SCM y)
{
if (x == cell_nil) return y;
assert (TYPE (x) == TPAIR);
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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)
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return cons (cons (x, y), a);
return cons (cons (car (x), car (y)),
pairlis (cdr (x), cdr (y), a));
}
SCM display_ (SCM);
SCM
call (SCM fn, SCM x)
{
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);}
default: {return ((SCM(*)(SCM))(FUNCTION (fn).function)) (x);}
}
return cell_unspecified;
}
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SCM
assq (SCM x, SCM a)
{
//FIXME: eq_p
//while (a != cell_nil && eq_p (x, CAAR (a)) == cell_f) a = CDR (a);
while (a != cell_nil && x != CAAR (a)) a = CDR (a);
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return a != cell_nil ? car (a) : cell_f;
}
SCM
assq_ref_env (SCM x, SCM a)
{
x = assq (x, a);
if (x == cell_f) return cell_undefined;
return cdr (x);
}
SCM
set_car_x (SCM x, SCM e)
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{
assert (TYPE (x) == TPAIR);
CAR (x) = e;
return cell_unspecified;
}
SCM
set_cdr_x (SCM x, SCM e)
{
//if (TYPE (x) != TPAIR) error (cell_symbol_not_a_pair, cons (x, cell_set_cdr_x));
CDR (x) = e;
return cell_unspecified;
}
SCM
set_env_x (SCM x, SCM e, SCM a)
{
SCM p = assert_defined (x, assq (x, a));
//if (TYPE (p) != TPAIR) error (cell_symbol_not_a_pair, cons (p, x));
return set_cdr_x (p, e);
}
SCM
call_lambda (SCM e, SCM x, SCM aa, SCM a) ///((internal))
{
SCM cl = cons (cons (cell_closure, x), x);
cl = cons (cons (cell_closure, x), x);
r1 = e;
r0 = cl;
return cell_unspecified;
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}
SCM
make_closure_ (SCM args, SCM body, SCM a) ///((internal))
{
return make_cell_ (tmp_num_ (TCLOSURE), cell_f, cons (cons (cell_circular, a), cons (args, body)));
}
SCM
lookup_macro_ (SCM x, SCM a) ///((internal))
{
if (TYPE (x) != TSYMBOL) return cell_f;
SCM m = assq_ref_env (x, a);
if (TYPE (m) == TMACRO) return MACRO (m);
return cell_f;
}
SCM
push_cc (SCM p1, SCM p2, SCM a, SCM c) ///((internal))
{
SCM x = r3;
r3 = c;
r2 = p2;
gc_push_frame ();
r1 = p1;
r0 = a;
r3 = x;
return cell_unspecified;
}
SCM gc_pop_frame (); //((internal))
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SCM
eval_apply ()
{
eval_apply:
// if (g_free + GC_SAFETY > ARENA_SIZE)
// gc_pop_frame (gc (gc_push_frame ()));
switch (r3)
{
case cell_vm_evlis: goto evlis;
case cell_vm_evlis2: goto evlis2;
case cell_vm_evlis3: goto evlis3;
case cell_vm_apply: goto apply;
case cell_vm_apply2: goto apply2;
case cell_vm_eval: goto eval;
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#if FIXED_PRIMITIVES
case cell_vm_eval_car: goto eval_car;
case cell_vm_eval_cdr: goto eval_cdr;
case cell_vm_eval_cons: goto eval_cons;
case cell_vm_eval_null_p: goto eval_null_p;
#endif
case cell_vm_eval_set_x: goto eval_set_x;
case cell_vm_eval_macro: goto eval_macro;
case cell_vm_eval2: goto eval2;
case cell_vm_macro_expand: goto macro_expand;
case cell_vm_begin: goto begin;
case cell_vm_begin_read_input_file: goto begin_read_input_file;
case cell_vm_begin2: goto begin2;
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case cell_vm_if: goto vm_if;
case cell_vm_if_expr: goto if_expr;
case cell_vm_call_with_current_continuation2: goto call_with_current_continuation2;
case cell_vm_call_with_values2: goto call_with_values2;
case cell_vm_return: goto vm_return;
case cell_unspecified: return r1;
default: assert (0);
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}
SCM x = cell_nil;
SCM y = cell_nil;
evlis:
if (r1 == cell_nil) goto vm_return;
if (TYPE (r1) != TPAIR) goto eval;
push_cc (car (r1), r1, r0, cell_vm_evlis2);
goto eval;
evlis2:
push_cc (cdr (r2), r1, r0, cell_vm_evlis3);
goto evlis;
evlis3:
r1 = cons (r2, r1);
goto vm_return;
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apply:
switch (TYPE (car (r1)))
{
case TFUNCTION: {
check_formals (car (r1), MAKE_NUMBER (FUNCTION (car (r1)).arity), cdr (r1));
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r1 = call (car (r1), cdr (r1)); /// FIXME: move into eval_apply
goto vm_return;
}
case TCLOSURE:
{
SCM cl = CLOSURE (CAR (r1));
SCM formals = CADR (cl);
SCM body = CDDR (cl);
SCM aa = CDAR (cl);
aa = CDR (aa);
check_formals (CAR (r1), formals, CDR (r1));
SCM p = pairlis (formals, CDR (r1), aa);
call_lambda (body, p, aa, r0);
goto begin;
}
case TCONTINUATION:
{
x = r1;
g_stack = CONTINUATION (CAR (r1));
gc_pop_frame ();
r1 = CADR (x);
goto eval_apply;
}
case TSPECIAL:
{
switch (car (r1))
{
case cell_vm_apply:
{
push_cc (cons (CADR (r1), CADDR (r1)), r1, r0, cell_vm_return);
goto apply;
}
case cell_vm_eval:
{
push_cc (CADR (r1), r1, CADDR (r1), cell_vm_return);
goto eval;
}
case cell_call_with_current_continuation:
{
r1 = cdr (r1);
goto call_with_current_continuation;
}
default: check_apply (cell_f, car (r1));
}
}
case TSYMBOL:
{
if (car (r1) == cell_symbol_call_with_values)
{
r1 = cdr (r1);
goto call_with_values;
}
if (car (r1) == cell_symbol_current_module)
{
r1 = r0;
goto vm_return;
}
break;
}
case TPAIR:
{
switch (CAAR (r1))
{
case cell_symbol_lambda:
{
SCM formals = CADR (car (r1));
SCM body = CDDR (car (r1));
SCM p = pairlis (formals, cdr (r1), r0);
check_formals (r1, formals, cdr (r1));
call_lambda (body, p, p, r0);
goto begin;
}
}
}
2017-01-18 06:38:45 +00:00
}
push_cc (car (r1), r1, r0, cell_vm_apply2);
goto eval;
apply2:
check_apply (r1, car (r2));
2017-01-18 06:38:45 +00:00
r1 = cons (r1, cdr (r2));
goto apply;
eval:
switch (TYPE (r1))
{
case TPAIR:
2017-01-18 06:38:45 +00:00
{
switch (car (r1))
{
#if FIXED_PRIMITIVES
case cell_symbol_car:
{
push_cc (CADR (r1), r1, r0, cell_vm_eval_car); goto eval;
eval_car:
x = r1; gc_pop_frame (); r1 = car (x); goto eval_apply;
}
case cell_symbol_cdr:
{
push_cc (CADR (r1), r1, r0, cell_vm_eval_cdr); goto eval;
eval_cdr:
x = r1; gc_pop_frame (); r1 = cdr (x); goto eval_apply;
}
case cell_symbol_cons: {
push_cc (CDR (r1), r1, r0, cell_vm_eval_cons); goto evlis;
eval_cons:
x = r1;
gc_pop_frame ();
r1 = cons (CAR (x), CADR (x));
goto eval_apply;
}
case cell_symbol_null_p:
{
push_cc (CADR (r1), r1, r0, cell_vm_eval_null_p);
goto eval;
eval_null_p:
x = r1; gc_pop_frame (); r1 = null_p (x); goto eval_apply;
}
#endif // FIXED_PRIMITIVES
case cell_symbol_quote:
{
x = r1; gc_pop_frame (); r1 = CADR (x); goto eval_apply;
}
case cell_symbol_begin: goto begin;
case cell_symbol_lambda:
{
r1 = make_closure_ (CADR (r1), CDDR (r1), assq (cell_closure, r0));
goto vm_return;
}
case cell_symbol_if: {r1=cdr (r1); goto vm_if;}
case cell_symbol_set_x:
{
push_cc (car (CDDR (r1)), r1, r0, cell_vm_eval_set_x);
goto eval;
eval_set_x:
x = r2;
r1 = set_env_x (CADR (x), r1, r0);
goto vm_return;
}
case cell_vm_macro_expand:
{
push_cc (CADR (r1), r1, r0, cell_vm_return);
goto macro_expand;
}
2017-01-18 06:38:45 +00:00
default: {
push_cc (r1, r1, r0, cell_vm_eval_macro);
goto macro_expand;
eval_macro:
x = r2;
if (r1 != r2)
{
if (TYPE (r1) == TPAIR)
2017-01-18 06:38:45 +00:00
{
set_cdr_x (r2, cdr (r1));
set_car_x (r2, car (r1));
}
goto eval;
}
push_cc (CDR (r1), r1, r0, cell_vm_eval2); goto evlis;
eval2:
r1 = cons (car (r2), r1);
goto apply;
}
}
}
case TSYMBOL:
2017-01-18 06:38:45 +00:00
{
r1 = assert_defined (r1, assq_ref_env (r1, r0));
goto vm_return;
}
default: {goto vm_return;}
2017-01-18 06:38:45 +00:00
}
SCM macro;
SCM expanders;
macro_expand:
if (TYPE (r1) == TPAIR
&& (macro = lookup_macro_ (car (r1), r0)) != cell_f)
{
r1 = cons (macro, CDR (r1));
goto apply;
}
else if (TYPE (r1) == TPAIR
&& TYPE (CAR (r1)) == TSYMBOL
&& ((expanders = assq_ref_env (cell_symbol_sc_expander_alist, r0)) != cell_undefined)
&& ((macro = assq (CAR (r1), expanders)) != cell_f))
{
SCM sc_expand = assq_ref_env (cell_symbol_macro_expand, r0);
if (sc_expand != cell_undefined && sc_expand != cell_f)
{
r1 = cons (sc_expand, cons (r1, cell_nil));
goto apply;
}
}
goto vm_return;
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begin:
x = cell_unspecified;
while (r1 != cell_nil) {
if (TYPE (r1) == TPAIR && TYPE (CAR (r1)) == TPAIR)
2017-01-18 06:38:45 +00:00
{
if (CAAR (r1) == cell_symbol_begin)
r1 = append2 (CDAR (r1), cdr (r1));
else if (CAAR (r1) == cell_symbol_primitive_load)
2017-01-18 06:38:45 +00:00
{
push_cc (cons (cell_symbol_read_input_file, cell_nil), r1, r0, cell_vm_begin_read_input_file);
goto apply;
begin_read_input_file:
r1 = append2 (r1, cdr (r2));
}
}
if (CDR (r1) == cell_nil)
{
r1 = car (r1);
goto eval;
}
push_cc (CAR (r1), r1, r0, cell_vm_begin2);
goto eval;
begin2:
x = r1;
r1 = CDR (r2);
}
r1 = x;
goto vm_return;
vm_if:
push_cc (car (r1), r1, r0, cell_vm_if_expr);
goto eval;
if_expr:
x = r1;
r1 = r2;
if (x != cell_f)
{
r1 = CADR (r1);
goto eval;
}
if (CDDR (r1) != cell_nil)
{
r1 = car (CDDR (r1));
goto eval;
}
r1 = cell_unspecified;
goto vm_return;
call_with_current_continuation:
gc_push_frame ();
#if __GNUC__
// FIXME GCC
x = MAKE_CONTINUATION (g_continuations++);
#else
x = MAKE_CONTINUATION (g_continuations);
g_continuations++;
#endif
gc_pop_frame ();
push_cc (cons (car (r1), cons (x, cell_nil)), x, r0, cell_vm_call_with_current_continuation2);
goto apply;
call_with_current_continuation2:
CONTINUATION (r2) = g_stack;
goto vm_return;
call_with_values:
push_cc (cons (car (r1), cell_nil), r1, r0, cell_vm_call_with_values2);
goto apply;
call_with_values2:
if (TYPE (r1) == TVALUES)
r1 = CDR (r1);
r1 = cons (CADR (r2), r1);
goto apply;
2017-01-18 06:38:45 +00:00
vm_return:
x = r1;
gc_pop_frame ();
r1 = x;
goto eval_apply;
}
SCM
gc_peek_frame () ///((internal))
{
SCM frame = CAR (g_stack);
r1 = CAR (frame);
r2 = CADR (frame);
r3 = CAR (CDDR (frame));
r0 = CADR (CDDR (frame));
return frame;
}
2017-01-18 06:38:45 +00:00
SCM
gc_pop_frame () ///((internal))
2017-01-18 06:38:45 +00:00
{
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;
}
// Posix
int
ungetchar (int c)
{
return ungetc (c, g_stdin);
}
int
peekchar ()
{
int c = getchar ();
ungetchar (c);
return c;
}
SCM
peek_byte ()
{
return MAKE_NUMBER (peekchar ());
}
SCM
read_byte ()
{
return MAKE_NUMBER (getchar ());
}
SCM
unread_byte (SCM i)
{
ungetchar (VALUE (i));
return i;
}
SCM
write_byte (SCM x) ///((arity . n))
{
SCM c = car (x);
SCM p = cdr (x);
int fd = 1;
if (TYPE (p) == TPAIR && TYPE (car (p)) == TNUMBER) fd = VALUE (car (p));
//FILE *f = fd == 1 ? stdout : stderr;
#if __GNUC__
assert (TYPE (c) == TNUMBER || TYPE (c) == TCHAR);
#endif
// fputc (VALUE (c), f);
char cc = VALUE (c);
write (1, (char*)&cc, fd);
return c;
}
char string_to_cstring_buf[1024];
char const*
string_to_cstring (SCM s)
{
//static char buf[1024];
//char *p = buf;
char *p = string_to_cstring_buf;
s = STRING(s);
while (s != cell_nil)
{
*p++ = VALUE (car (s));
s = cdr (s);
}
*p = 0;
//return buf;
return string_to_cstring_buf;
}
SCM
getenv_ (SCM s) ///((name . "getenv"))
{
#if 0
char *p = getenv (string_to_cstring (s));
return p ? MAKE_STRING (cstring_to_list (p)) : cell_f;
#else
return cell_t;
#endif
}
SCM
open_input_file (SCM file_name)
{
return MAKE_NUMBER (open (string_to_cstring (file_name), O_RDONLY));
// char *s = string_to_cstring (file_name);
// int x = open (s, 0);
// return MAKE_NUMBER (x);
}
SCM
current_input_port ()
{
return MAKE_NUMBER (g_stdin);
}
SCM
set_current_input_port (SCM port)
{
g_stdin = VALUE (port) ? VALUE (port) : STDIN;
return current_input_port ();
}
SCM
force_output (SCM p) ///((arity . n))
{
#if 0
//FIXME
int fd = 1;
if (TYPE (p) == TPAIR && TYPE (car (p)) == TNUMBER) fd = VALUE (car (p));
FILE *f = fd == 1 ? stdout : stderr;
fflush (f);
#endif
return cell_unspecified;
}
// Math
SCM
greater_p (SCM x) ///((name . ">") (arity . n))
{
int n = INT_MAX;
while (x != cell_nil)
{
assert (TYPE (car (x)) == TNUMBER);
if (VALUE (car (x)) >= n) return cell_f;
n = VALUE (car (x));
x = cdr (x);
}
return cell_t;
}
SCM
less_p (SCM x) ///((name . "<") (arity . n))
{
int n = INT_MIN;
while (x != cell_nil)
{
assert (TYPE (car (x)) == TNUMBER);
if (VALUE (car (x)) <= n) return cell_f;
n = VALUE (car (x));
x = cdr (x);
}
return cell_t;
}
SCM
is_p (SCM x) ///((name . "=") (arity . n))
{
if (x == cell_nil) return cell_t;
assert (TYPE (car (x)) == TNUMBER);
int n = VALUE (car (x));
x = cdr (x);
while (x != cell_nil)
{
if (VALUE (car (x)) != n) return cell_f;
x = cdr (x);
}
return cell_t;
}
SCM
minus (SCM x) ///((name . "-") (arity . n))
{
SCM a = car (x);
assert (TYPE (a) == TNUMBER);
int n = VALUE (a);
x = cdr (x);
if (x == cell_nil)
n = -n;
while (x != cell_nil)
{
assert (TYPE (car (x)) == TNUMBER);
#if __GNUC__
n -= VALUE (car (x));
#else
n = n - VALUE (car (x));
#endif
x = cdr (x);
}
return MAKE_NUMBER (n);
}
SCM
plus (SCM x) ///((name . "+") (arity . n))
{
int n = 0;
while (x != cell_nil)
{
assert (TYPE (car (x)) == TNUMBER);
#if __GNUC__
n += VALUE (car (x));
#else
n = n + VALUE (car (x));
#endif
x = cdr (x);
}
return MAKE_NUMBER (n);
}
SCM
divide (SCM x) ///((name . "/") (arity . n))
{
int n = 1;
if (x != cell_nil) {
assert (TYPE (car (x)) == TNUMBER);
n = VALUE (car (x));
x = cdr (x);
}
while (x != cell_nil)
{
assert (TYPE (car (x)) == TNUMBER);
#if __GNUC__
n /= VALUE (car (x));
#else
n = n / VALUE (car (x));
#endif
x = cdr (x);
}
return MAKE_NUMBER (n);
}
SCM
modulo (SCM a, SCM b)
{
assert (TYPE (a) == TNUMBER);
assert (TYPE (b) == TNUMBER);
int x = VALUE (a);
while (x < 0) x += VALUE (b);
return MAKE_NUMBER (x % VALUE (b));
}
SCM
multiply (SCM x) ///((name . "*") (arity . n))
{
int n = 1;
while (x != cell_nil)
{
assert (TYPE (car (x)) == TNUMBER);
#if __GNUC__
n *= VALUE (car (x));
#else
n = n * VALUE (car (x));
#endif
x = cdr (x);
}
return MAKE_NUMBER (n);
}
SCM
logior (SCM x) ///((arity . n))
{
int n = 0;
while (x != cell_nil)
{
assert (TYPE (car (x)) == TNUMBER);
#if __GNUC__
n |= VALUE (car (x));
#else
n = n | VALUE (car (x));
#endif
x = cdr (x);
}
return MAKE_NUMBER (n);
}
SCM
ash (SCM n, SCM count)
{
assert (TYPE (n) == TNUMBER);
assert (TYPE (count) == TNUMBER);
int cn = VALUE (n);
int ccount = VALUE (count);
return MAKE_NUMBER ((ccount < 0) ? cn >> -ccount : cn << ccount);
}
// Lib [rest of]
int g_depth;
SCM
display_helper (SCM x, int cont, char* sep, int fd)
{
fputs (sep, fd);
if (g_depth == 0) return cell_unspecified;
g_depth = g_depth - 1;
switch (TYPE (x))
{
case TCHAR:
{
fputs ("#\\", fd);
putc (VALUE (x), fd);
break;
}
case TFUNCTION:
{
fputs ("#<procedure ", fd);
char *p = "?";
if (FUNCTION (x).name != 0)
p = FUNCTION (x).name;
fputs (p, fd);
fputs ("[", fd);
fputs (itoa (CDR (x)), fd);
fputs (",", fd);
fputs (itoa (x), fd);
fputs ("]>", fd);
break;
}
case TMACRO:
{
fputs ("#<macro ", fd);
display_helper (cdr (x), cont, "", fd);
fputs (">", fd);
break;
}
case TNUMBER:
{
fputs (itoa (VALUE (x)), fd);
break;
}
case TPAIR:
{
if (!cont) fputs ("(", fd);
if (x && x != cell_nil) fdisplay_ (CAR (x), fd);
if (CDR (x) && TYPE (CDR (x)) == TPAIR)
display_helper (CDR (x), 1, " ", fd);
else if (CDR (x) && CDR (x) != cell_nil)
{
if (TYPE (CDR (x)) != TPAIR)
fputs (" . ", fd);
fdisplay_ (CDR (x), fd);
}
if (!cont) fputs (")", fd);
break;
}
case TSPECIAL:
#if __NYACC__
// FIXME
//{}
{
SCM t = CAR (x);
while (t && t != cell_nil)
{
putc (VALUE (CAR (t)), fd);
t = CDR (t);
}
break;
}
#endif
case TSTRING:
#if __NYACC__
// FIXME
{
SCM t = CAR (x);
while (t && t != cell_nil)
{
putc (VALUE (CAR (t)), fd);
t = CDR (t);
}
break;
}
#endif
case TSYMBOL:
{
SCM t = CAR (x);
while (t && t != cell_nil)
{
putc (VALUE (CAR (t)), fd);
t = CDR (t);
}
break;
}
default:
{
fputs ("<", fd);
fputs (itoa (TYPE (x)), fd);
fputs (":", fd);
fputs (itoa (x), fd);
fputs (">", fd);
break;
}
}
return 0;
}
SCM
display_ (SCM x)
{
g_depth = 5;
return display_helper (x, 0, "", STDOUT);
}
SCM
display_error_ (SCM x)
{
g_depth = 5;
return display_helper (x, 0, "", STDERR);
}
SCM
fdisplay_ (SCM x, int fd) ///((internal))
{
g_depth = 5;
return display_helper (x, 0, "", fd);
}
SCM
exit_ (SCM x) ///((name . "exit"))
{
assert (TYPE (x) == TNUMBER);
exit (VALUE (x));
}
SCM
append (SCM x) ///((arity . n))
{
if (x == cell_nil) return cell_nil;
if (cdr (x) == cell_nil) return car (x);
return append2 (car (x), append (cdr (x)));
}
SCM
xassq (SCM x, SCM a) ///for speed in core only
{
while (a != cell_nil && x != CDAR (a)) a = CDR (a);
return a != cell_nil ? CAR (a) : cell_f;
}
// Jam Collector
SCM g_symbol_max;
2017-01-18 06:38:45 +00:00
SCM
gc_init_cells () ///((internal))
2017-01-18 06:38:45 +00:00
{
//return 0;
//g_cells = (scm *)malloc (ARENA_SIZE);
//int size = ARENA_SIZE * sizeof (struct scm);
int size = ARENA_SIZE * 12;
#if MES_GC
size = size * 2;
#endif
#if __GNUC__
arena = (char*)malloc (size);
#else
char *p = 0;
p = malloc (size);
arena = p;
#endif
g_cells = arena;
return 0;
//g_cells = (scm *)malloc (2*ARENA_SIZE*sizeof(scm));
TYPE (0) = TVECTOR;
LENGTH (0) = 1000;
VECTOR (0) = 0;
g_cells++;
TYPE (0) = TCHAR;
VALUE (0) = 'c';
return 0;
}
SCM
gc_init_news () ///((internal))
{
eputs ("gc_init_news\n");
///g_news = g_cells-1 + ARENA_SIZE;
//g_news = g_cells + ARENA_SIZE * 12 + GC_SAFETY * 6;
char *p = g_cells;
// g_news = g_cells;
int halfway = ARENA_SIZE * 12;
int safety = GC_SAFETY * 12;
safety = safety / 2;
halfway = halfway + safety;
// g_news = g_news + halfway;
p = p + halfway;
g_news = p;
eputs ("g_cells=");
eputs (itoa (g_cells));
eputs (" size=");
eputs (itoa (halfway));
eputs (" news=");
eputs (itoa (g_news));
eputs (" news - cells=");
char * c = g_cells;
eputs (itoa (p - c));
eputs ("\n");
NTYPE (0) = TVECTOR;
NLENGTH (0) = 1000;
NVECTOR (0) = 0;
g_news++;
NTYPE (0) = TCHAR;
NVALUE (0) = 'n';
return 0;
}
2017-01-18 06:38:45 +00:00
// INIT NEWS
2017-01-18 06:38:45 +00:00
SCM
mes_symbols () ///((internal))
{
gc_init_cells ();
// gc_init_news ();
#include "mini-mes.symbols.i"
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;
#include "mini-mes.symbol-names.i"
a = acons (cell_symbol_mes_version, MAKE_STRING (cstring_to_list (VERSION)), a);
a = acons (cell_symbol_mes_prefix, MAKE_STRING (cstring_to_list (PREFIX)), a);
a = acons (cell_symbol_dot, cell_dot, a);
a = acons (cell_symbol_begin, cell_begin, a);
a = acons (cell_symbol_call_with_current_continuation, cell_call_with_current_continuation, a);
a = acons (cell_symbol_sc_expand, cell_f, a);
#if __GNUC__
a = acons (cell_symbol_gnuc, cell_t, a);
a = acons (cell_symbol_mesc, cell_f, a);
#else
a = acons (cell_symbol_gnuc, cell_f, a);
a = acons (cell_symbol_mesc, cell_t, a);
#endif
a = acons (cell_closure, a, a);
return a;
}
SCM
mes_environment () ///((internal))
{
SCM a = 0;
a = mes_symbols ();
a = mes_g_stack (a);
return a;
}
SCM
mes_builtins (SCM a) ///((internal))
{
#include "mini-mes.i"
// #include "lib.i"
// #include "math.i"
// #include "posix.i"
// #include "reader.i"
#include "vector.i"
// #include "lib.environment.i"
// #include "math.environment.i"
#include "mini-mes.environment.i"
// #include "posix.environment.i"
// #include "reader.environment.i"
#include "vector.environment.i"
return a;
}
2017-01-18 06:38:45 +00:00
SCM
bload_env (SCM a) ///((internal))
{
char *mo = "module/mes/read-0-32.mo";
g_stdin = open (mo, 0);
if (g_stdin < 0) {eputs ("no such file: ");eputs (mo);eputs ("\n");return 1;}
2017-01-18 06:38:45 +00:00
assert (getchar () == 'M');
assert (getchar () == 'E');
assert (getchar () == 'S');
eputs ("*GOT MES*\n");
2017-01-18 06:38:45 +00:00
g_stack = getchar () << 8;
g_stack += getchar ();
char *p = (char*)g_cells;
int c = getchar ();
2017-01-18 06:38:45 +00:00
while (c != -1)
{
*p++ = c;
c = getchar ();
}
g_free = (p-(char*)g_cells) / sizeof (struct scm);
gc_peek_frame ();
g_symbols = r1;
2017-01-18 06:38:45 +00:00
g_stdin = STDIN;
r0 = mes_builtins (r0);
#if __GNUC__
set_env_x (cell_symbol_gnuc, cell_t, r0);
set_env_x (cell_symbol_mesc, cell_f, r0);
#else
set_env_x (cell_symbol_gnuc, cell_f, r0);
set_env_x (cell_symbol_mesc, cell_t, r0);
#endif
if (g_debug)
{
puts ("symbols: ");
SCM s = g_symbols;
while (s && s != cell_nil) {
display_ (CAR (s));
puts (" ");
s = CDR (s);
}
puts ("\n");
puts ("functions: ");
puts (itoa (g_function));
puts ("\n");
for (int i = 0; i < g_function; i++)
{
puts ("[");
puts (itoa (i));
puts ("]: ");
puts (g_functions[i].name);
puts ("\n");
}
display_ (r0);
puts ("\n");
}
return r2;
}
// #include "math.c"
// #include "posix.c"
// #include "lib.c"
// #include "reader.c"
#include "vector.c"
// #include "gc.c"
int
main (int argc, char *argv[])
{
eputs ("Hello mini-mes!\n");
#if __GNUC__
//g_debug = getenv ("MES_DEBUG");
#endif
//if (getenv ("MES_ARENA")) ARENA_SIZE = atoi (getenv ("MES_ARENA"));
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
g_stdin = STDIN;
r0 = mes_environment ();
#if MES_MINI
SCM program = bload_env (r0);
#else
SCM program = (argc > 1 && !strcmp (argv[1], "--load"))
? bload_env (r0) : load_env (r0);
if (argc > 1 && !strcmp (argv[1], "--dump")) return dump ();
#endif
push_cc (r2, cell_unspecified, r0, cell_unspecified);
if (g_debug)
{
eputs ("program: ");
display_ (r1);
eputs ("\n");
}
r3 = cell_vm_begin;
2017-01-18 06:38:45 +00:00
r1 = eval_apply ();
display_ (r1);
eputs ("\n");
#if !MES_MINI
gc (g_stack);
#endif
if (g_debug)
{
eputs ("\nstats: [");
eputs (itoa (g_free));
eputs ("]\n");
}
return 0;
}
#if __GNUC__
#include "mstart.c"
#endif