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mes/mes.c
Jan Nieuwenhuizen f612feec47 core+mini-mes: Move function name to struct function. 
* module/language/c99/compiler.mes (expr->arg): Handle char arguments.
* doc/examples/cons-mes.c (struct function): Add name field.
* doc/examples/mini-mes.c: Likewise.
  (mes_builtins): Update.
* mes.c: Likewise.
* build-aux/mes-snarf.scm: Update.
2017-03-09 23:27:12 +01:00

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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/>.
*/
#define _GNU_SOURCE
#if __GNUC__
#define __NYACC__ 0
#define NYACC
#define NYACC2
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#else
typedef int bool;
#define __NYACC__ 1
#define NYACC nyacc
#define NYACC2 nyacc2
#endif
#define DEBUG 0
#define FIXED_PRIMITIVES 1
int ARENA_SIZE = 100000;
int MAX_ARENA_SIZE = 20000000;
int GC_SAFETY = 100;
typedef int SCM;
enum type_t {CHAR, CLOSURE, CONTINUATION, FUNCTION, KEYWORD, MACRO, NUMBER, PAIR, REF, SPECIAL, STRING, SYMBOL, VALUES, VECTOR, BROKEN_HEART};
typedef SCM (*function0_t) (void);
typedef SCM (*function1_t) (SCM);
typedef SCM (*function2_t) (SCM, SCM);
typedef SCM (*function3_t) (SCM, SCM, SCM);
typedef SCM (*functionn_t) (SCM);
typedef struct function_struct {
union {
function0_t function0;
function1_t function1;
function2_t function2;
function3_t function3;
functionn_t functionn;
} NYACC;
int arity;
char const *name;
} function_t;
struct scm;
typedef struct scm_struct {
enum type_t type;
union {
char const* name;
SCM string;
SCM car;
SCM ref;
int length;
} NYACC;
union {
int value;
int function;
SCM cdr;
SCM closure;
SCM continuation;
SCM macro;
SCM vector;
int hits;
} NYACC2;
} scm;
scm scm_nil = {SPECIAL, "()"};
scm scm_f = {SPECIAL, "#f"};
scm scm_t = {SPECIAL, "#t"};
scm scm_dot = {SPECIAL, "."};
scm scm_arrow = {SPECIAL, "=>"};
scm scm_undefined = {SPECIAL, "*undefined*"};
scm scm_unspecified = {SPECIAL, "*unspecified*"};
scm scm_closure = {SPECIAL, "*closure*"};
scm scm_circular = {SPECIAL, "*circular*"};
scm scm_begin = {SPECIAL, "*begin*"};
scm scm_symbol_dot = {SYMBOL, "*dot*"};
scm scm_symbol_lambda = {SYMBOL, "lambda"};
scm scm_symbol_begin = {SYMBOL, "begin"};
scm scm_symbol_if = {SYMBOL, "if"};
scm scm_symbol_quote = {SYMBOL, "quote"};
scm scm_symbol_set_x = {SYMBOL, "set!"};
scm scm_symbol_sc_expand = {SYMBOL, "sc-expand"};
scm scm_symbol_macro_expand = {SYMBOL, "macro-expand"};
scm scm_symbol_sc_expander_alist = {SYMBOL, "*sc-expander-alist*"};
scm scm_symbol_call_with_values = {SYMBOL, "call-with-values"};
scm scm_call_with_current_continuation = {SPECIAL, "*call/cc*"};
scm scm_symbol_call_with_current_continuation = {SYMBOL, "call-with-current-continuation"};
scm scm_symbol_current_module = {SYMBOL, "current-module"};
scm scm_symbol_primitive_load = {SYMBOL, "primitive-load"};
scm scm_symbol_read_input_file = {SYMBOL, "read-input-file"};
scm scm_symbol_write = {SYMBOL, "write"};
scm scm_symbol_display = {SYMBOL, "display"};
scm scm_symbol_throw = {SYMBOL, "throw"};
scm scm_symbol_not_a_pair = {SYMBOL, "not-a-pair"};
scm scm_symbol_system_error = {SYMBOL, "system-error"};
scm scm_symbol_wrong_number_of_args = {SYMBOL, "wrong-number-of-args"};
scm scm_symbol_wrong_type_arg = {SYMBOL, "wrong-type-arg"};
scm scm_symbol_unbound_variable = {SYMBOL, "unbound-variable"};
scm scm_symbol_argv = {SYMBOL, "%argv"};
scm scm_symbol_mes_prefix = {SYMBOL, "%prefix"};
scm scm_symbol_mes_version = {SYMBOL, "%version"};
scm scm_symbol_car = {SYMBOL, "car"};
scm scm_symbol_cdr = {SYMBOL, "cdr"};
scm scm_symbol_null_p = {SYMBOL, "null?"};
scm scm_symbol_eq_p = {SYMBOL, "eq?"};
scm scm_symbol_cons = {SYMBOL, "cons"};
scm scm_vm_evlis = {SPECIAL, "*vm-evlis*"};
scm scm_vm_evlis2 = {SPECIAL, "*vm-evlis2*"};
scm scm_vm_evlis3 = {SPECIAL, "*vm-evlis3*"};
scm scm_vm_apply = {SPECIAL, "core:apply"};
scm scm_vm_apply2 = {SPECIAL, "*vm-apply2*"};
scm scm_vm_eval = {SPECIAL, "core:eval"};
#if 1 //FIXED_PRIMITIVES
scm scm_vm_eval_car = {SPECIAL, "*vm-eval-car*"};
scm scm_vm_eval_cdr = {SPECIAL, "*vm-eval-cdr*"};
scm scm_vm_eval_cons = {SPECIAL, "*vm-eval-cons*"};
scm scm_vm_eval_null_p = {SPECIAL, "*vm-eval-null-p*"};
#endif
scm scm_vm_eval_set_x = {SPECIAL, "*vm-eval-set!*"};
scm scm_vm_eval_macro = {SPECIAL, "*vm-eval-macro*"};
scm scm_vm_eval2 = {SPECIAL, "*vm-eval2*"};
scm scm_vm_macro_expand = {SPECIAL, "core:macro-expand"};
scm scm_vm_begin = {SPECIAL, "*vm-begin*"};
scm scm_vm_begin_read_input_file = {SPECIAL, "*vm-begin-read-input-file*"};
scm scm_vm_begin2 = {SPECIAL, "*vm-begin2*"};
scm scm_vm_if = {SPECIAL, "*vm-if*"};
scm scm_vm_if_expr = {SPECIAL, "*vm-if-expr*"};
scm scm_vm_call_with_values2 = {SPECIAL, "*vm-call-with-values2*"};
scm scm_vm_call_with_current_continuation2 = {SPECIAL, "*vm-call-with-current-continuation2*"};
scm scm_vm_return = {SPECIAL, "*vm-return*"};
scm scm_test = {SYMBOL, "test"};
int g_free = 0;
scm *g_cells;
scm *g_news = 0;
#include "mes.symbols.h"
SCM tmp;
SCM tmp_num;
SCM tmp_num2;
function_t g_functions[200];
int g_function = 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
#include "lib.h"
#include "math.h"
#include "mes.h"
#include "posix.h"
#include "reader.h"
#define CAR(x) g_cells[x].car
#define CDR(x) g_cells[x].cdr
#define CONTINUATION(x) g_cells[x].cdr
#define HITS(x) g_cells[x].hits
#define LENGTH(x) g_cells[x].length
#define NAME(x) g_cells[x].name
#define STRING(x) g_cells[x].string
#define TYPE(x) g_cells[x].type
#define CLOSURE(x) g_cells[x].closure
#define MACRO(x) g_cells[x].macro
#define REF(x) g_cells[x].ref
#define VALUE(x) g_cells[x].value
#define VECTOR(x) g_cells[x].vector
#define FUNCTION(x) g_functions[g_cells[x].function]
#define NCAR(x) g_news[x].car
#define NTYPE(x) g_news[x].type
#define CAAR(x) CAR (CAR (x))
#define CDAR(x) CDR (CAR (x))
#define CAAR(x) CAR (CAR (x))
#define CADAR(x) CAR (CDR (CAR (x)))
#define CADDR(x) CAR (CDR (CDR (x)))
#define CDDDR(x) CDR (CDR (CDR (x)))
#define CDADAR(x) CAR (CDR (CAR (CDR (x))))
#define CADR(x) CAR (CDR (x))
#define MAKE_CHAR(n) make_cell (tmp_num_ (CHAR), 0, tmp_num2_ (n))
#define MAKE_CONTINUATION(n) make_cell (tmp_num_ (CONTINUATION), n, g_stack)
#define MAKE_NUMBER(n) make_cell (tmp_num_ (NUMBER), 0, tmp_num2_ (n))
#define MAKE_REF(n) make_cell (tmp_num_ (REF), n, 0)
#define MAKE_STRING(x) make_cell (tmp_num_ (STRING), x, 0)
SCM vm_call (function0_t f, SCM p1, SCM a);
SCM
tmp_num_ (int x)
{
g_cells[tmp_num].value = x;
return tmp_num;
}
SCM
tmp_num2_ (int x)
{
g_cells[tmp_num2].value = x;
return tmp_num2;
}
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) == NUMBER);
TYPE (x) = VALUE (type);
if (VALUE (type) == CHAR || VALUE (type) == NUMBER) {
if (car) CAR (x) = CAR (car);
if (cdr) CDR (x) = CDR (cdr);
} else if (VALUE (type) == FUNCTION) {
if (car) CAR (x) = car;
if (cdr) CDR (x) = CDR (cdr);
} else {
CAR (x) = car;
CDR (x) = cdr;
}
return x;
}
SCM
cons (SCM x, SCM y)
{
g_cells[tmp_num].value = PAIR;
return make_cell (tmp_num, x, y);
}
SCM
car (SCM x)
{
if (TYPE (x) != PAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_car));
return CAR (x);
}
SCM
cdr (SCM x)
{
if (TYPE (x) != PAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_cdr));
return CDR (x);
}
SCM
eq_p (SCM x, SCM y)
{
return (x == y
|| ((TYPE (x) == KEYWORD && TYPE (y) == KEYWORD
&& STRING (x) == STRING (y)))
|| (TYPE (x) == CHAR && TYPE (y) == CHAR
&& VALUE (x) == VALUE (y))
|| (TYPE (x) == NUMBER && TYPE (y) == NUMBER
&& VALUE (x) == VALUE (y)))
? cell_t : cell_f;
}
SCM
type_ (SCM x)
{
return MAKE_NUMBER (TYPE (x));
}
SCM
car_ (SCM x)
{
return (TYPE (x) != CONTINUATION
&& (TYPE (CAR (x)) == PAIR // FIXME: this is weird
|| TYPE (CAR (x)) == REF
|| TYPE (CAR (x)) == SPECIAL
|| TYPE (CAR (x)) == SYMBOL
|| TYPE (CAR (x)) == STRING)) ? CAR (x) : MAKE_NUMBER (CAR (x));
}
SCM
cdr_ (SCM x)
{
return (TYPE (CDR (x)) == PAIR
|| TYPE (CDR (x)) == REF
|| TYPE (CAR (x)) == SPECIAL
|| TYPE (CDR (x)) == SYMBOL
|| TYPE (CDR (x)) == STRING) ? CDR (x) : MAKE_NUMBER (CDR (x));
}
SCM
set_car_x (SCM x, SCM e)
{
assert (TYPE (x) == PAIR);
CAR (x) = e;
return cell_unspecified;
}
SCM
set_cdr_x (SCM x, SCM e)
{
if (TYPE (x) != PAIR) 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) != PAIR) error (cell_symbol_not_a_pair, cons (p, x));
return set_cdr_x (p, e);
}
SCM
pairlis (SCM x, SCM y, SCM a)
{
if (x == cell_nil)
return a;
if (TYPE (x) != PAIR)
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 && eq_p (x, CAAR (a)) == cell_f) a = CDR (a);
return a != cell_nil ? car (a) : cell_f;
}
SCM
assq_ref_cache (SCM x, SCM a)
{
x = assq (x, a);
if (x == cell_f) return cell_undefined;
return cdr (x);
}
SCM
call_lambda (SCM e, SCM x, SCM aa, SCM a) ///((internal))
{
SCM cl = cons (cons (cell_closure, x), x);
r1 = e;
r0 = cl;
return cell_unspecified;
}
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
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;
#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;
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);
}
SCM x = cell_nil;
SCM y = cell_nil;
evlis:
if (r1 == cell_nil) goto vm_return;
if (TYPE (r1) != PAIR) 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;
apply:
switch (TYPE (car (r1)))
{
case FUNCTION: {
check_formals (car (r1), MAKE_NUMBER (FUNCTION (car (r1)).arity), cdr (r1));
r1 = call (car (r1), cdr (r1)); /// FIXME: move into eval_apply
goto vm_return;
}
case CLOSURE:
{
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 CONTINUATION:
{
x = r1;
g_stack = CONTINUATION (CAR (r1));
gc_pop_frame ();
r1 = cadr (x);
goto eval_apply;
}
case SPECIAL:
{
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 SYMBOL:
{
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 PAIR:
{
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;
}
}
}
}
push_cc (car (r1), r1, r0, cell_vm_apply2);
goto eval;
apply2:
check_apply (r1, car (r2));
r1 = cons (r1, cdr (r2));
goto apply;
eval:
switch (TYPE (r1))
{
case PAIR:
{
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;
}
default: {
push_cc (r1, r1, r0, cell_vm_eval_macro);
goto macro_expand;
eval_macro:
x = r2;
if (r1 != r2)
{
if (TYPE (r1) == PAIR)
{
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 SYMBOL:
{
r1 = assert_defined (r1, assq_ref_cache (r1, r0));
goto vm_return;
}
default: goto vm_return;
}
SCM macro;
SCM expanders;
macro_expand:
if (TYPE (r1) == PAIR
&& (macro = lookup_macro (car (r1), r0)) != cell_f)
{
r1 = cons (macro, CDR (r1));
goto apply;
}
else if (TYPE (r1) == PAIR
&& TYPE (CAR (r1)) == SYMBOL
&& ((expanders = assq_ref_cache (cell_symbol_sc_expander_alist, r0)) != cell_undefined)
&& ((macro = assq (CAR (r1), expanders)) != cell_f))
{
SCM sc_expand = assq_ref_cache (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;
begin:
x = cell_unspecified;
while (r1 != cell_nil) {
if (TYPE (r1) == PAIR && TYPE (CAR (r1)) == PAIR)
{
if (caar (r1) == cell_symbol_begin)
r1 = append2 (cdar (r1), cdr (r1));
else if (caar (r1) == cell_symbol_primitive_load)
{
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 ();
x = MAKE_CONTINUATION (g_continuations++);
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) == VALUES)
r1 = CDR (r1);
r1 = cons (cadr (r2), r1);
goto apply;
vm_return:
x = r1;
gc_pop_frame ();
r1 = x;
goto eval_apply;
}
SCM
call (SCM fn, SCM x)
{
if ((FUNCTION (fn).arity > 0 || FUNCTION (fn).arity == -1)
&& x != cell_nil && TYPE (CAR (x)) == VALUES)
x = cons (CADAR (x), CDR (x));
if ((FUNCTION (fn).arity > 1 || FUNCTION (fn).arity == -1)
&& x != cell_nil && TYPE (CDR (x)) == PAIR && TYPE (CADR (x)) == VALUES)
x = cons (CAR (x), cons (CDADAR (x), CDR (x)));
switch (FUNCTION (fn).arity)
{
case 0: return FUNCTION (fn).function0 ();
case 1: return FUNCTION (fn).function1 (car (x));
case 2: return FUNCTION (fn).function2 (car (x), cadr (x));
case 3: return FUNCTION (fn).function3 (car (x), cadr (x), car (cddr (x)));
case -1: return FUNCTION (fn).functionn (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
gc_push_frame ()
{
SCM frame = cons (r1, cons (r2, cons (r3, cons (r0, cell_nil))));
return g_stack = cons (frame, g_stack);
}
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 ();
}
SCM
append2 (SCM x, SCM y)
{
if (x == cell_nil) return y;
assert (TYPE (x) == PAIR);
return cons (car (x), append2 (cdr (x), y));
}
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
cstring_to_list (char const* s)
{
SCM p = cell_nil;
int i = strlen (s);
while (i--)
p = cons (MAKE_CHAR (s[i]), p);
return p;
}
SCM
null_p (SCM x)
{
return x == cell_nil ? cell_t : cell_f;
}
SCM
make_symbol_ (SCM s)
{
g_cells[tmp_num].value = SYMBOL;
SCM x = make_cell (tmp_num, s, 0);
g_symbols = cons (x, g_symbols);
return x;
}
SCM
make_symbol (SCM s)
{
SCM x = lookup_symbol_ (s);
return x ? x : make_symbol_ (s);
}
SCM
make_vector (SCM n)
{
int k = VALUE (n);
g_cells[tmp_num].value = VECTOR;
SCM v = alloc (k);
SCM x = make_cell (tmp_num, k, v);
for (int i=0; i<k; i++) g_cells[v+i] = g_cells[vector_entry (cell_unspecified)];
return x;
}
SCM
arity_ (SCM x)
{
assert (TYPE (x) == FUNCTION);
return MAKE_NUMBER (FUNCTION (x).arity);
}
SCM
values (SCM x) ///((arity . n))
{
SCM v = cons (0, x);
TYPE (v) = VALUES;
return v;
}
SCM
vector_length (SCM x)
{
assert (TYPE (x) == VECTOR);
return MAKE_NUMBER (LENGTH (x));
}
SCM
vector_ref (SCM x, SCM i)
{
assert (TYPE (x) == VECTOR);
assert (VALUE (i) < LENGTH (x));
SCM e = VECTOR (x) + VALUE (i);
if (TYPE (e) == REF) e = g_cells[e].ref;
if (TYPE (e) == CHAR) e = MAKE_CHAR (VALUE (e));
if (TYPE (e) == NUMBER) e = MAKE_NUMBER (VALUE (e));
return e;
}
SCM
vector_entry (SCM x) {
if (TYPE (x) == PAIR || TYPE (x) == SPECIAL || TYPE (x) == STRING || TYPE (x) == SYMBOL || TYPE (x) == VECTOR) x = MAKE_REF (x);
return x;
}
SCM
vector_set_x (SCM x, SCM i, SCM e)
{
assert (TYPE (x) == VECTOR);
assert (VALUE (i) < LENGTH (x));
g_cells[VECTOR (x)+g_cells[i].value] = g_cells[vector_entry (e)];
return cell_unspecified;
}
SCM
list_to_vector (SCM x)
{
VALUE (tmp_num) = VALUE (length (x));
SCM v = make_vector (tmp_num);
SCM p = VECTOR (v);
while (x != cell_nil)
{
g_cells[p++] = g_cells[vector_entry (car (x))];
x = cdr (x);
}
return v;
}
SCM
vector_to_list (SCM v)
{
SCM x = cell_nil;
for (int i = 0; i < LENGTH (v); i++) {
SCM e = VECTOR (v)+i;
if (TYPE (e) == REF) e = g_cells[e].ref;
x = append2 (x, cons (e, cell_nil));
}
return x;
}
void
make_tmps (scm* cells)
{
tmp = g_free++;
cells[tmp].type = CHAR;
tmp_num = g_free++;
cells[tmp_num].type = NUMBER;
tmp_num2 = g_free++;
cells[tmp_num2].type = NUMBER;
}
// Jam Collector
SCM g_symbol_max;
bool g_debug = false;
SCM
gc_up_arena ()
{
ARENA_SIZE *= 2;
void *p = realloc (g_cells-1, 2*ARENA_SIZE*sizeof(scm));
if (!p) error (cell_symbol_system_error, cons (MAKE_STRING (cstring_to_list (strerror (errno))), MAKE_NUMBER (g_free)));
g_cells = (scm*)p;
g_cells++;
gc_init_news ();
}
SCM
gc ()
{
if (g_debug) fprintf (stderr, "***gc[%d]...", g_free);
g_free = 1;
if (g_cells < g_news && ARENA_SIZE < MAX_ARENA_SIZE) gc_up_arena ();
for (int i=g_free; i<g_symbol_max; i++)
gc_copy (i);
make_tmps (g_news);
g_symbols = gc_copy (g_symbols);
SCM new = gc_copy (g_stack);
if (g_debug) fprintf (stderr, "new=%d\n", new, g_stack);
g_stack = new;
return gc_loop (1);
}
SCM
gc_loop (SCM scan)
{
while (scan < g_free)
{
if (NTYPE (scan) == CLOSURE
|| NTYPE (scan) == CONTINUATION
|| NTYPE (scan) == FUNCTION
|| NTYPE (scan) == KEYWORD
|| NTYPE (scan) == MACRO
|| NTYPE (scan) == PAIR
|| NTYPE (scan) == REF
|| scan == 1 // null
|| NTYPE (scan) == SPECIAL
|| NTYPE (scan) == STRING
|| NTYPE (scan) == SYMBOL)
{
SCM car = gc_copy (g_news[scan].car);
gc_relocate_car (scan, car);
}
if ((NTYPE (scan) == CLOSURE
|| NTYPE (scan) == CONTINUATION
|| NTYPE (scan) == MACRO
|| NTYPE (scan) == PAIR
|| NTYPE (scan) == VALUES)
&& g_news[scan].cdr) // allow for 0 terminated list of symbols
{
SCM cdr = gc_copy (g_news[scan].cdr);
gc_relocate_cdr (scan, cdr);
}
scan++;
}
return gc_flip ();
}
SCM
gc_copy (SCM old)
{
if (TYPE (old) == BROKEN_HEART) return g_cells[old].car;
SCM new = g_free++;
g_news[new] = g_cells[old];
if (NTYPE (new) == VECTOR)
{
g_news[new].vector = g_free;
for (int i=0; i<LENGTH (old); i++)
g_news[g_free++] = g_cells[VECTOR (old)+i];
}
g_cells[old].type = BROKEN_HEART;
g_cells[old].car = new;
return new;
}
SCM
gc_relocate_car (SCM new, SCM car)
{
g_news[new].car = car;
return cell_unspecified;
}
SCM
gc_relocate_cdr (SCM new, SCM cdr)
{
g_news[new].cdr = cdr;
return cell_unspecified;
}
SCM
gc_flip ()
{
scm *cells = g_cells;
g_cells = g_news;
g_news = cells;
if (g_debug) fprintf (stderr, " => jam[%d]\n", g_free);
return g_stack;
}
// Environment setup
SCM
acons (SCM key, SCM value, SCM alist)
{
return cons (cons (key, value), alist);
}
SCM
gc_init_cells ()
{
g_cells = (scm *)malloc (2*ARENA_SIZE*sizeof(scm));
g_cells[0].type = VECTOR;
g_cells[0].length = 1000;
g_cells[0].vector = 0;
g_cells++;
g_cells[0].type = CHAR;
g_cells[0].value = 'c';
}
SCM
gc_init_news ()
{
g_news = g_cells-1 + ARENA_SIZE;
g_news[0].type = VECTOR;
g_news[0].length = 1000;
g_news[0].vector = 0;
g_news++;
g_news[0].type = CHAR;
g_news[0].value = 'n';
}
SCM
mes_symbols () ///((internal))
{
gc_init_cells ();
gc_init_news ();
#include "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 "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);
#if BOOT
a = acons (cell_symbol_label, cell_t, a);
#endif
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);
a = acons (cell_closure, a, a);
return a;
}
SCM
mes_builtins (SCM a)
{
#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"
return a;
}
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;
}
SCM
mes_environment () ///((internal))
{
SCM a = mes_symbols ();
return mes_g_stack (a);
}
SCM
make_closure (SCM args, SCM body, SCM a)
{
return make_cell (tmp_num_ (CLOSURE), cell_f, cons (cons (cell_circular, a), cons (args, body)));
}
SCM
lookup_macro (SCM x, SCM a)
{
if (TYPE (x) != SYMBOL) return cell_f;
SCM m = assq_ref_cache (x, a);
if (TYPE (m) == MACRO) return MACRO (m);
return cell_f;
}
FILE *g_stdin;
#include "lib.c"
#include "math.c"
#include "posix.c"
#include "reader.c"
int
main (int argc, char *argv[])
{
#if __GNUC__
g_debug = getenv ("MES_DEBUG");
#else
#endif
if (getenv ("MES_ARENA")) ARENA_SIZE = atoi (getenv ("MES_ARENA"));
if (argc > 1 && !strcmp (argv[1], "--help")) return puts ("Usage: mes [--dump|--load] < FILE");
if (argc > 1 && !strcmp (argv[1], "--version")) {puts ("Mes ");puts (VERSION);return 0;};
g_stdin = stdin;
r0 = mes_environment ();
SCM program = (argc > 1 && !strcmp (argv[1], "--load"))
? bload_env (r0) : load_env (r0);
if (argc > 1 && !strcmp (argv[1], "--dump")) return dump ();
SCM lst = cell_nil;
for (int i=argc; i; i--) lst = cons (MAKE_STRING (cstring_to_list (argv[i-1])), lst);
r0 = acons (cell_symbol_argv, lst, r0);
push_cc (r2, cell_unspecified, r0, cell_unspecified);
r3 = cell_vm_begin;
r1 = eval_apply ();
stderr_ (r1);
fputs ("", stderr);
gc (g_stack);
#if __GNUC__
if (g_debug) fprintf (stderr, "\nstats: [%d]\n", g_free);
#else
#endif
return 0;
}
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