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/* -*-comment-start: "//";comment-end:""-*-
* Mes --- Maxwell Equations of Software
* Copyright © 2016 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
#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdbool.h>
#define DEBUG 0
#define QUASIQUOTE 1
//#define QUASISYNTAX 0
#define GC 1
#define MES_FULL 1
#define MES_MINI 0 // 1 for gc-2a.test, gc-3.test
#if MES_FULL
int ARENA_SIZE = 400000000; // need this much for scripts/mescc.mes
//int ARENA_SIZE = 300000000; // need this much for tests/match.scm
//int ARENA_SIZE = 30000000; // need this much for tests/record.scm
//int ARENA_SIZE = 500000; // enough for tests/scm.test
//int ARENA_SIZE = 60000; // enough for tests/base.test
int GC_SAFETY = 10000;
int GC_FREE = 20000;
#else
//int ARENA_SIZE = 500; // MINI
int ARENA_SIZE = 4000; // MES_MINI, gc-3.test
//int ARENA_SIZE = 10000; // gc-2a.test
//int ARENA_SIZE = 18000; // gc-2.test -->KRAK
//int ARENA_SIZE = 23000; // gc-2.test OK
// int GC_SAFETY = 1000;
// int GC_FREE = 1000;
int GC_SAFETY = 10;
int GC_FREE = 10;
#endif
typedef long SCM;
enum type_t {CHAR, FUNCTION, MACRO, NUMBER, PAIR, SPECIAL, STRING, SYMBOL, REF, 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_t {
union {
function0_t function0;
function1_t function1;
function2_t function2;
function3_t function3;
functionn_t functionn;
};
int arity;
} function;
struct scm_t;
typedef struct scm_t {
enum type_t type;
union {
char const *name;
SCM string;
SCM car;
SCM ref;
int length;
};
union {
int value;
int function;
SCM cdr;
SCM macro;
SCM vector;
int hits;
};
} scm;
function functions[200];
int g_function = 0;
#include "mes.symbols.h"
#include "define.h"
#include "lib.h"
#include "math.h"
#include "mes.h"
#include "posix.h"
#include "quasiquote.h"
#include "string.h"
#include "type.h"
SCM display_ (FILE* f, SCM x);
SCM display_helper (FILE*, SCM , bool, char const*, bool);
SCM symbols = 0;
SCM stack = 0;
SCM r0 = 0; // a/env
SCM r1 = 0; // param 1
SCM r2 = 0; // param 2
SCM r3 = 0; // param 3
scm scm_nil = {SPECIAL, "()"};
scm scm_f = {SPECIAL, "#f"};
scm scm_t = {SPECIAL, "#t"};
scm scm_dot = {SPECIAL, "."};
scm scm_undefined = {SPECIAL, "*undefined*"};
scm scm_unspecified = {SPECIAL, "*unspecified*"};
scm scm_closure = {SPECIAL, "*closure*"};
scm scm_circular = {SPECIAL, "*circular*"};
#if BOOT
scm scm_label = {
SPECIAL, "label"};
#endif
scm scm_begin = {SPECIAL, "*begin*"};
scm scm_symbol_lambda = {SYMBOL, "lambda"};
scm scm_symbol_begin = {SYMBOL, "begin"};
scm scm_symbol_if = {SYMBOL, "if"};
scm scm_symbol_define = {SYMBOL, "define"};
scm scm_symbol_define_macro = {SYMBOL, "define-macro"};
scm scm_symbol_set_x = {SYMBOL, "set!"};
scm scm_symbol_quote = {SYMBOL, "quote"};
scm scm_symbol_quasiquote = {SYMBOL, "quasiquote"};
scm scm_symbol_unquote = {SYMBOL, "unquote"};
scm scm_symbol_unquote_splicing = {SYMBOL, "unquote-splicing"};
scm scm_symbol_sc_expand = {SYMBOL, "sc-expand"};
scm scm_symbol_expand_macro = {SYMBOL, "expand-macro"};
scm scm_symbol_sc_expander_alist = {SYMBOL, "*sc-expander-alist*"};
scm scm_symbol_noexpand = {SYMBOL, "noexpand"};
scm scm_symbol_syntax = {SYMBOL, "syntax"};
scm scm_symbol_quasisyntax = {SYMBOL, "quasisyntax"};
scm scm_symbol_unsyntax = {SYMBOL, "unsyntax"};
scm scm_symbol_unsyntax_splicing = {SYMBOL, "unsyntax-splicing"};
scm scm_symbol_call_with_values = {SYMBOL, "call-with-values"};
scm scm_symbol_current_module = {SYMBOL, "current-module"};
scm scm_symbol_primitive_load = {SYMBOL, "primitive-load"};
scm char_nul = {CHAR, .name="nul", .value=0};
scm char_backspace = {CHAR, .name="backspace", .value=8};
scm char_tab = {CHAR, .name="tab", .value=9};
scm char_newline = {CHAR, .name="newline", .value=10};
scm char_vt = {CHAR, .name="vt", .value=11};
scm char_page = {CHAR, .name="page", .value=12};
scm char_return = {CHAR, .name="return", .value=13};
scm char_space = {CHAR, .name="space", .value=32};
scm g_free = {NUMBER, .value=0};
scm *g_cells;
scm *g_news = 0;
#define CAR(x) g_cells[x].car
#define CDR(x) g_cells[x].cdr
#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 CDADAR(x) CAR (CDR (CAR (CDR (x))))
#define CADR(x) CAR (CDR (x))
#define LENGTH(x) g_cells[x].length
#define STRING(x) g_cells[x].string
#define TYPE(x) g_cells[x].type
#define MACRO(x) g_cells[x].macro
#define VALUE(x) g_cells[x].value
#define VECTOR(x) g_cells[x].vector
#define FUNCTION(x) functions[g_cells[x].function]
#define NCAR(x) g_news[x].car
#define NTYPE(x) g_news[x].type
enum type_t
type (SCM x)
{
return g_cells[x].type;
}
SCM
car (SCM x)
{
assert (g_cells[x].type == PAIR);
return g_cells[x].car;
}
SCM
cdr (SCM x)
{
assert (g_cells[x].type == PAIR);
return g_cells[x].cdr;
}
long
value (SCM x)
{
return g_cells[x].value;
}
SCM
alloc (int n)
{
#if GC
assert (g_free.value + n < ARENA_SIZE);
SCM x = g_free.value;
g_free.value += n;
return x;
#else
return (SCM )malloc(n*sizeof (scm));
#endif
}
SCM
gc_alloc (int n)
{
assert (g_free.value + n < ARENA_SIZE);
SCM x = g_free.value;
g_free.value += n;
return x;
}
SCM g_start;
scm *
gc_news ()
{
g_news = (scm *)malloc (ARENA_SIZE*sizeof(scm));
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';
return g_news;
}
SCM
gc ()
{
fprintf (stderr, "***gc[%d]...", g_free.value);
g_free.value = 1;
if (!g_news)
gc_news ();
for (int i=g_free.value; i<g_start; i++)
gc_copy (i);
symbols = gc_copy (symbols);
SCM new = gc_copy (stack);
fprintf (stderr, "new=%d, start=%d\n", new, stack);
stack = new;
return gc_loop (1);
}
SCM
gc_loop (SCM scan)
{
while (scan < g_free.value)
{
if (NTYPE (scan) == MACRO
|| NTYPE (scan) == PAIR
|| NTYPE (scan) == REF
|| scan == 1
|| ((NTYPE (scan) == SPECIAL && TYPE (NCAR (scan)) == PAIR)
|| (NTYPE (scan) == STRING && TYPE (NCAR (scan)) == PAIR)
|| (NTYPE (scan) == SYMBOL && TYPE (NCAR (scan)) == PAIR)))
{
SCM car = gc_copy (g_news[scan].car);
gc_relocate_car (scan, car);
}
if ((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.value++;
g_news[new] = g_cells[old];
if (NTYPE (new) == VECTOR)
{
g_news[new].vector = g_free.value;
for (int i=0; i<LENGTH (old); i++)
g_news[g_free.value++] = 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;
fprintf (stderr, " => jam[%d]\n", g_free.value);
return stack;
}
SCM
gc_show ()
{
fprintf (stderr, "cells: ");
scm *t = g_cells;
display_ (stderr, -1);
fprintf (stderr, "\n");
if (g_news)
{
fprintf (stderr, "news: ");
g_cells = g_news;
display_ (stderr, -1);
fprintf (stderr, "\n");
}
g_cells = t;
return cell_unspecified;
}
SCM
gc_make_cell (SCM type, SCM car, SCM cdr)
{
SCM x = gc_alloc (1);
assert (g_cells[type].type == NUMBER);
g_cells[x].type = value (type);
if (value (type) == CHAR || value (type) == NUMBER) {
if (car) g_cells[x].car = g_cells[car].car;
if (cdr) g_cells[x].cdr = g_cells[cdr].cdr;
} else {
g_cells[x].car = car;
g_cells[x].cdr = cdr;
}
return x;
}
SCM tmp;
SCM tmp_num;
SCM tmp_num2;
SCM tmp_num3;
SCM tmp_num4;
SCM
gc_make_vector (SCM n)
{
g_cells[tmp_num].value = VECTOR;
SCM v = gc_alloc (value (n));
SCM x = gc_make_cell (tmp_num, (SCM)(long)value (n), v);
for (int i=0; i<value (n); i++) g_cells[x+i].vector = vector_entry (cell_unspecified);
return x;
}
SCM
make_cell (SCM type, SCM car, SCM cdr)
{
SCM x = alloc (1);
assert (g_cells[type].type == NUMBER);
g_cells[x].type = VALUE (type);
if (VALUE (type) == CHAR || VALUE (type) == NUMBER) {
if (car) g_cells[x].car = g_cells[car].car;
if (cdr) g_cells[x].cdr = g_cells[cdr].cdr;
} else if (VALUE (type) == FUNCTION) {
if (car) g_cells[x].car = car;
if (cdr) g_cells[x].cdr = g_cells[cdr].cdr;
} else {
g_cells[x].car = car;
g_cells[x].cdr = cdr;
}
return x;
}
SCM
cons (SCM x, SCM y)
{
g_cells[tmp_num].value = PAIR;
return make_cell (tmp_num, x, y);
}
SCM
eq_p (SCM x, SCM y)
{
return (x == y
|| (g_cells[x].type == CHAR && g_cells[y].type == CHAR
&& VALUE (x) == VALUE (y))
|| (g_cells[x].type == NUMBER && g_cells[y].type == NUMBER
&& VALUE (x) == VALUE (y)))
? cell_t : cell_f;
}
SCM
set_car_x (SCM x, SCM e)
{
assert (g_cells[x].type == PAIR);
g_cells[x].car = e;
return cell_unspecified;
}
SCM
set_cdr_x (SCM x, SCM e)
{
assert (g_cells[x].type == PAIR);
cache_invalidate (cdr (x));
g_cells[x].cdr = e;
return cell_unspecified;
}
SCM
set_env_x (SCM x, SCM e, SCM a)
{
cache_invalidate (x);
SCM p = assert_defined (x, assq (x, a));
return set_cdr_x (p, e);
}
SCM
quote (SCM x)
{
return cons (cell_symbol_quote, x);
}
SCM
quasiquote (SCM x)
{
return cons (cell_symbol_quasiquote, x);
}
SCM
quasisyntax (SCM x)
{
return cons (cell_symbol_quasisyntax, x);
}
SCM
pairlis (SCM x, SCM y, SCM a)
{
if (x == cell_nil)
return a;
if (pair_p (x) == cell_f)
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)
{
if (g_cells[a].type == BROKEN_HEART || g_cells[CAR (a)].type == BROKEN_HEART)
fprintf (stderr, "oops, broken heart\n");
a = g_cells[a].cdr;
}
return a != cell_nil ? car (a) : cell_f;
}
#define ENV_CACHE 1
#define CACHE_SIZE 30
#define ENV_HEAD 15
#if !ENV_CACHE
SCM
assq_ref_cache (SCM x, SCM a)
{
x = assq (x, a);
if (x == cell_f) return cell_undefined;
return cdr (x);
}
SCM cache_invalidate (SCM x){}
SCM cache_invalidate_range (SCM p,SCM a){}
SCM cache_save (SCM p){}
SCM cache_lookup (SCM x){}
#else // ENV_CACHE
SCM env_cache_cars[CACHE_SIZE];
SCM env_cache_cdrs[CACHE_SIZE];
int cache_threshold = 0;
SCM
cache_save (SCM p)
{
int n = g_cells[car (p)].hits;
if (n < cache_threshold) return cell_unspecified;
int j = -1;
for (int i=0; i < CACHE_SIZE; i++) {
if (!env_cache_cars[i]) {
j = i;
break;
}
if (env_cache_cars[i] == car (p)) return cell_unspecified;
if (n > g_cells[env_cache_cars[i]].hits) {
n = g_cells[env_cache_cars[i]].hits;
j = i;
}
}
if (j >= 0) {
cache_threshold = g_cells[car (p)].hits;
env_cache_cars[j] = car (p);
env_cache_cdrs[j] = cdr (p);
}
return cell_unspecified;
}
SCM
cache_lookup (SCM x)
{
for (int i=0; i < CACHE_SIZE; i++) {
if (!env_cache_cars[i]) break;
if (env_cache_cars[i] == x) return env_cache_cdrs[i];
}
return cell_undefined;
}
SCM
cache_invalidate (SCM x)
{
for (int i=0; i < CACHE_SIZE; i++) {
if (env_cache_cars[i] == x) {
env_cache_cars[i] = 0;
break;
}
}
return cell_unspecified;
}
SCM
cache_invalidate_range (SCM p, SCM a)
{
do {
cache_invalidate (caar (p));
p = cdr (p);
} while (p != a);
return cell_unspecified;
}
SCM
assq_ref_cache (SCM x, SCM a)
{
g_cells[x].hits++;
SCM c = cache_lookup (x);
if (c != cell_undefined) return c;
int i = 0;
while (a != cell_nil && x != CAAR (a)) {i++;a = cdr (a);}
if (a == cell_nil) return cell_undefined;
if (i>ENV_HEAD) cache_save (car (a));
return cdar (a);
}
#endif // ENV_CACHE
SCM
assert_defined (SCM x, SCM e)
{
if (e == cell_undefined)
{
fprintf (stderr, "eval: unbound variable:");
display_ (stderr, x);
fprintf (stderr, "\n");
assert (!"unbound variable");
}
return e;
}
SCM
gc_frame (SCM stack)
{
SCM frame = car (stack);
r1 = car (frame);
r2 = cadr (frame);
r3 = caddr (frame);
r0 = cadddr (frame);
return frame;
}
SCM
gc_stack (SCM a)
{
SCM frame = cons (r1, cons (r2, cons (r3, cons (r0, cell_nil))));
stack = cons (frame, stack);
stack = gc (stack);
gc_frame (stack);
stack = cdr (stack);
return stack;
}
SCM
vm_call (function0_t f, SCM p1, SCM p2, SCM a)
{
SCM frame = cons (r1, cons (r2, cons (r3, cons (r0, cell_nil))));
stack = cons (frame, stack);
r1 = p1;
r2 = p2;
r0 = a;
if (f == vm_if_env && g_free.value + GC_SAFETY > ARENA_SIZE)
{
cache_invalidate_range (r0, cell_nil);
gc_stack (stack);
frame = car (stack);
}
SCM r = f ();
frame = gc_frame (stack);
stack = cdr (stack);
return r;
}
SCM
evlis_env (SCM m, SCM a)
{
return vm_call (vm_evlis_env, m, cell_undefined, a);
}
SCM
apply_env (SCM fn, SCM x, SCM a)
{
return vm_call (vm_apply_env, fn, x, a);
}
SCM
eval_env (SCM e, SCM a)
{
return vm_call (vm_eval_env, e, cell_undefined, a);
}
SCM
expand_macro_env (SCM e, SCM a)
{
return vm_call (vm_expand_macro_env, e, cell_undefined, a);
}
SCM
begin_env (SCM e, SCM a)
{
return vm_call (vm_begin_env, e, cell_undefined, a);
}
SCM
if_env (SCM e, SCM a)
{
return vm_call (vm_if_env, e, cell_undefined, a);
}
SCM
call_lambda (SCM e, SCM x, SCM aa, SCM a) ///((internal))
{
SCM cl = cons (cons (cell_closure, x), x);
r1 = e;
r0 = cl;
r2 = a;
r3 = aa;
cache_invalidate_range (r0, g_cells[r3].cdr);
SCM r = vm_call_lambda ();
cache_invalidate_range (r0, g_cells[r3].cdr);
return r;
}
SCM
vm_evlis_env ()
{
if (r1 == cell_nil) return cell_nil;
if (type (r1) != PAIR) return eval_env (r1, r0);
r2 = eval_env (car (r1), r0);
r1 = evlis_env (cdr (r1), r0);
return cons (r2, r1);
}
SCM
vm_call_lambda ()
{
return vm_call (vm_begin_env, r1, cell_undefined, r0);
}
SCM
vm_apply_env ()
{
if (type (r1) != PAIR)
{
if (type (r1) == FUNCTION) return call (r1, r2);
if (r1 == cell_symbol_call_with_values)
return call_with_values_env (car (r2), cadr (r2), r0);
if (r1 == cell_symbol_current_module) return r0;
}
else if (car (r1) == cell_symbol_lambda) {
SCM args = cadr (r1);
SCM body = cddr (r1);
SCM p = pairlis (args, r2, r0);
return call_lambda (body, p, p, r0);
// r2 = p;
// cache_invalidate_range (r2, g_cells[r0].cdr);
// SCM r = begin_env (cddr (r1), cons (cons (cell_closure, p), p));
// cache_invalidate_range (r2, g_cells[r0].cdr);
// return r;
}
else if (car (r1) == cell_closure) {
SCM args = caddr (r1);
SCM body = cdddr (r1);
SCM aa = cdadr (r1);
aa = cdr (aa);
SCM p = pairlis (args, r2, aa);
return call_lambda (body, p, aa, r0);
// r2 = p;
// r3 = aa;
// cache_invalidate_range (r2, g_cells[r3].cdr);
// SCM r = begin_env (body, cons (cons (cell_closure, p), p));
// cache_invalidate_range (r2, g_cells[r3].cdr);
// return r;
}
#if BOOT
else if (car (r1) == cell_symbol_label)
return apply_env (caddr (r1), r2, cons (cons (cadr (r1), caddr (r1)), r0));
#endif
SCM e = eval_env (r1, r0);
char const* type = 0;
if (e == cell_f || e == cell_t) type = "bool";
if (g_cells[e].type == CHAR) type = "char";
if (g_cells[e].type == NUMBER) type = "number";
if (g_cells[e].type == STRING) type = "string";
if (e == cell_unspecified) type = "*unspecified*";
if (e == cell_undefined) type = "*undefined*";
if (type)
{
fprintf (stderr, "cannot apply: %s: ", type);
display_ (stderr, e);
fprintf (stderr, " [");
display_ (stderr, r1);
fprintf (stderr, "]\n");
assert (!"cannot apply");
}
return apply_env (e, r2, r0);
}
SCM cstring_to_list (char const* s);
SCM
vm_eval_env ()
{
switch (type (r1))
{
case PAIR:
{
if (car (r1) == cell_symbol_quote)
return cadr (r1);
#if QUASISYNTAX
if (car (r1) == cell_symbol_syntax)
return r1;
#endif
if (car (r1) == cell_symbol_begin)
return begin_env (r1, r0);
if (car (r1) == cell_symbol_lambda)
return make_closure (cadr (r1), cddr (r1), assq (cell_closure, r0));
if (car (r1) == cell_closure)
return r1;
if (car (r1) == cell_symbol_if)
return if_env (cdr (r1), r0);
#if !BOOT
if (car (r1) == cell_symbol_define)
return define_env (r1, r0);
if (car (r1) == cell_symbol_define_macro)
return define_env (r1, r0);
if (car (r1) == cell_symbol_primitive_load)
return load_env (r0);
#else
if (car (r1) == cell_symbol_define) {
fprintf (stderr, "C DEFINE: ");
display_ (stderr,
g_cells[cadr (r1)].type == SYMBOL
? g_cells[cadr (r1)].string
: g_cells[caadr (r1)].string);
fprintf (stderr, "\n");
}
assert (car (r1) != cell_symbol_define);
assert (car (r1) != cell_symbol_define_macro);
#endif
#if 1 //!BOOT
if (car (r1) == cell_symbol_set_x)
return set_env_x (cadr (r1), eval_env (caddr (r1), r0), r0);
#else
assert (car (r1) != cell_symbol_set_x);
#endif
#if QUASIQUOTE
if (car (r1) == cell_symbol_unquote)
return eval_env (cadr (r1), r0);
if (car (r1) == cell_symbol_quasiquote)
return eval_quasiquote (cadr (r1), add_unquoters (r0));
#endif //QUASIQUOTE
#if QUASISYNTAX
if (car (r1) == cell_symbol_unsyntax)
return eval_env (cadr (r1), r0);
if (car (r1) == cell_symbol_quasisyntax)
return eval_quasisyntax (cadr (r1), add_unsyntaxers (r0));
#endif //QUASISYNTAX
SCM x = expand_macro_env (r1, r0);
if (x != r1)
return eval_env (x, r0);
SCM m = evlis_env (g_cells[r1].cdr, r0);
return apply_env (car (r1), m, r0);
}
case SYMBOL: return assert_defined (r1, assq_ref_cache (r1, r0));
default: return r1;
}
}
SCM
vm_expand_macro_env ()
{
if (TYPE (CAR (r1)) == STRING && string_to_symbol (CAR (r1)) == cell_symbol_noexpand)
return cadr (r1);
SCM macro;
SCM expanders;
if (TYPE (r1) == PAIR
&& (macro = lookup_macro (car (r1), r0)) != cell_f)
return apply_env (macro, CDR (r1), r0);
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_expand_macro, r0);
if (sc_expand != cell_undefined && sc_expand != cell_f)
r1 = apply_env (sc_expand, cons (r1, cell_nil), r0);
}
return r1;
}
SCM
vm_begin_env ()
{
SCM r = cell_unspecified;
while (r1 != cell_nil) {
if (g_cells[r1].type == PAIR && g_cells[CAR (r1)].type == PAIR && caar (r1) == cell_symbol_begin)
r1 = append2 (cdar (r1), cdr (r1));
r = eval_env (car (r1), r0);
r1 = g_cells[r1].cdr;
}
return r;
}
SCM
vm_if_env ()
{
SCM x = eval_env (car (r1), r0);
if (x != cell_f)
return eval_env (cadr (r1), r0);
if (cddr (r1) != cell_nil)
return eval_env (caddr (r1), r0);
return cell_unspecified;
}
//Helpers
SCM
display (SCM x) ///((arity . n))
{
SCM e = car (x);
SCM p = cdr (x);
int fd = 1;
if (g_cells[p].type == PAIR && g_cells[car (p)].type == NUMBER) fd = g_cells[car (p)].hits;
FILE *f = fd == 1 ? stdout : stderr;
return display_helper (f, e, false, "", false);
}
SCM
display_ (FILE* f, SCM x)
{
return display_helper (f, x, false, "", false);
}
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), caddr (x));
case -1: return FUNCTION (fn).functionn (x);
}
return cell_unspecified;
}
SCM
append2 (SCM x, SCM y)
{
if (x == cell_nil) return y;
assert (g_cells[x].type == PAIR);
return cons (car (x), append2 (cdr (x), y));
}
SCM
append (SCM x) ///((arity . n))
{
if (x == cell_nil) return cell_nil;
return append2 (car (x), append (cdr (x)));
}
SCM
make_char (int x)
{
g_cells[tmp_num].value = CHAR;
g_cells[tmp_num2].value = x;
return make_cell (tmp_num, tmp_num2, tmp_num2);
}
SCM
make_function (SCM name, SCM id, SCM arity)
{
g_cells[tmp_num3].value = FUNCTION;
// function fun_read_byte = {.function0=&read_byte, .arity=0};
// scm scm_read_byte = {FUNCTION, .name="read-int", .function=&fun_read_byte};
// SCM cell_read_byte = 93;
function *f = (function*)malloc (sizeof (function));
f->arity = VALUE (arity);
g_cells[tmp_num4].value = (long)f;
return make_cell (tmp_num3, name, tmp_num4);
}
SCM
make_macro (SCM name, SCM x)
{
g_cells[tmp_num].value = MACRO;
return make_cell (tmp_num, STRING (name), x);
}
SCM
make_number (int x)
{
g_cells[tmp_num].value = NUMBER;
g_cells[tmp_num2].value = x;
return make_cell (tmp_num, tmp_num2, tmp_num2);
}
SCM
make_ref (SCM x)
{
g_cells[tmp_num].value = REF;
return make_cell (tmp_num, x, x);
}
SCM
make_string (SCM x)
{
g_cells[tmp_num].value = STRING;
return make_cell (tmp_num, x, 0);
}
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
list_of_char_equal_p (SCM a, SCM b)
{
while (a != cell_nil && b != cell_nil && g_cells[car (a)].value == g_cells[car (b)].value) {
assert (g_cells[car (a)].type == CHAR);
assert (g_cells[car (b)].type == CHAR);
a = cdr (a);
b = cdr (b);
}
return (a == cell_nil && b == cell_nil) ? cell_t : cell_f;
}
SCM
internal_lookup_symbol (SCM s)
{
SCM x = symbols;
while (x) {
// .string and .name is the same field; .name is used as a handy
// static field initializer. A string can only be mistaken for a
// cell with type == PAIR for the one character long, zero-padded
// #\etx.
SCM p = g_cells[car (x)].string;
char const* n = g_cells[car (x)].name;
if (p < 0 || p >= g_free.value || g_cells[p].type != PAIR)
g_cells[car (x)].string = cstring_to_list (g_cells[car (x)].name);
if (list_of_char_equal_p (g_cells[car (x)].string, s) == cell_t) break;
x = cdr (x);
}
if (x) x = car (x);
return x;
}
SCM
internal_make_symbol (SCM s)
{
g_cells[tmp_num].value = SYMBOL;
SCM x = make_cell (tmp_num, s, 0);
symbols = cons (x, symbols);
return x;
}
SCM
make_symbol (SCM s)
{
SCM x = internal_lookup_symbol (s);
return x ? x : internal_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
values (SCM x) ///((arity . n))
{
SCM v = cons (0, x);
g_cells[v].type = VALUES;
return v;
}
SCM
call_with_values_env (SCM producer, SCM consumer, SCM a)
{
SCM v = apply_env (producer, cell_nil, a);
if (g_cells[v].type == VALUES)
v = g_cells[v].cdr;
return apply_env (consumer, v, a);
}
SCM
vector_length (SCM x)
{
assert (g_cells[x].type == VECTOR);
return make_number (LENGTH (x));
}
SCM
vector_ref (SCM x, SCM i)
{
assert (g_cells[x].type == VECTOR);
assert (value (i) < LENGTH (x));
SCM e = VECTOR (x) + value (i);
if (g_cells[e].type == REF) e = g_cells[e].ref;
if (g_cells[e].type == CHAR) e = make_char (value (e));
if (g_cells[e].type == NUMBER) e = make_number (value (e));
return e;
}
SCM
vector_entry (SCM x) {
if (g_cells[x].type == PAIR || g_cells[x].type == SPECIAL || g_cells[x].type == STRING || g_cells[x].type == SYMBOL || g_cells[x].type == VECTOR) x = make_ref (x);
return x;
}
SCM
vector_set_x (SCM x, SCM i, SCM e)
{
assert (g_cells[x].type == VECTOR);
assert (value (i) < LENGTH (x));
g_cells[VECTOR (x)+g_cells[i].value] = g_cells[vector_entry (e)];
return cell_unspecified;
}
SCM
lookup (SCM s, SCM a)
{
if (isdigit (value (car (s))) || (value (car (s)) == '-' && cdr (s) != cell_nil)) {
SCM p = s;
int sign = 1;
if (value (car (s)) == '-') {
sign = -1;
p = cdr (s);
}
int n = 0;
while (p != cell_nil && isdigit (value (car (p)))) {
n *= 10;
n += value (car (p)) - '0';
p = cdr (p);
}
if (p == cell_nil) return make_number (n * sign);
}
SCM x = internal_lookup_symbol (s);
if (x) return x;
if (cdr (s) == cell_nil) {
if (value (car (s)) == '\'') return cell_symbol_quote;
if (value (car (s)) == '`') return cell_symbol_quasiquote;
if (value (car (s)) == ',') return cell_symbol_unquote;
}
else if (cddr (s) == cell_nil) {
if (value (car (s)) == ',' && value (cadr (s)) == '@') return cell_symbol_unquote_splicing;
if (value (car (s)) == '#' && value (cadr (s)) == '\'') return cell_symbol_syntax;
if (value (car (s)) == '#' && value (cadr (s)) == '`') return cell_symbol_quasisyntax;
if (value (car (s)) == '#' && value (cadr (s)) == ',') return cell_symbol_unsyntax;
}
else if (cdddr (s) == cell_nil) {
if (value (car (s)) == '#' && value (cadr (s)) == ',' && value (caddr (s)) == '@') return cell_symbol_unsyntax_splicing;
if (value (car (s)) == 'E' && value (cadr (s)) == 'O' && value (caddr (s)) == 'F') {
fprintf (stderr, "mes: got EOF\n");
return cell_nil; // `EOF': eval program, which may read stdin
}
}
return internal_make_symbol (s);
}
SCM
lookup_char (int c, SCM a)
{
return lookup (cons (make_char (c), cell_nil), a);
}
SCM
list_to_vector (SCM x)
{
g_cells[tmp_num].value = 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
newline (SCM p) ///((arity . n))
{
int fd = 1;
if (g_cells[p].type == PAIR && g_cells[car (p)].type == NUMBER) fd = g_cells[car (p)].value;
FILE *f = fd == 1 ? stdout : stderr;
fputs ("\n", f);
return cell_unspecified;
}
SCM
force_output (SCM p) ///((arity . n))
{
int fd = 1;
if (g_cells[p].type == PAIR && g_cells[car (p)].type == NUMBER) fd = g_cells[car (p)].value;
FILE *f = fd == 1 ? stdout : stderr;
fflush (f);
}
SCM
display_helper (FILE* f, SCM x, bool cont, char const *sep, bool quote)
{
SCM r;
fprintf (f, "%s", sep);
switch (g_cells[x].type)
{
case CHAR:
{
char const *name = 0;
if (value (x) == char_nul.value) name = char_nul.name;
else if (value (x) == char_backspace.value) name = char_backspace.name;
else if (value (x) == char_tab.value) name = char_tab.name;
else if (value (x) == char_newline.value) name = char_newline.name;
else if (value (x) == char_vt.value) name = char_vt.name;
else if (value (x) == char_page.value) name = char_page.name;
else if (value (x) == char_return.value) name = char_return.name;
else if (value (x) == char_space.value) name = char_space.name;
if (name) fprintf (f, "#\\%s", name);
else fprintf (f, "#\\%c", value (x));
break;
}
case MACRO:
fprintf (f, "(*macro* ");
display_helper (f, g_cells[x].macro, cont, sep, quote);
fprintf (f, ")");
break;
case NUMBER: fprintf (f, "%d", value (x)); break;
case PAIR:
{
if (car (x) == cell_circular) {
fprintf (f, "(*circ* . #-1#)");
return cell_unspecified;
}
if (car (x) == cell_closure) {
fprintf (f, "(*closure* . #-1#)");
return cell_unspecified;
}
if (car (x) == cell_symbol_quote) {
fprintf (f, "'");
return display_helper (f, car (cdr (x)), cont, "", true);
}
if (!cont) fprintf (f, "(");
display_ (f, car (x));
if (cdr (x) && g_cells[cdr (x)].type == PAIR)
display_helper (f, cdr (x), true, " ", false);
else if (cdr (x) != cell_nil) {
fprintf (f, " . ");
display_ (f, cdr (x));
}
if (!cont) fprintf (f, ")");
break;
}
case VECTOR:
{
fprintf (f, "#(");
for (int i = 0; i < LENGTH (x); i++) {
if (g_cells[VECTOR (x)+i].type == VECTOR
|| (g_cells[VECTOR (x)+i].type == REF
&& g_cells[g_cells[VECTOR (x)+i].ref].type == VECTOR))
fprintf (f, "%s#(...)", i ? " " : "");
else
display_helper (f,VECTOR (x)+i, false, i ? " " : "", false);
}
fprintf (f, ")");
break;
}
case REF: display_helper (f, g_cells[x].ref, cont, "", true); break;
case FUNCTION:
{
fprintf (f, "#<procedure ");
SCM p = g_cells[x].string;
char const* n = g_cells[x].name;
if (p < 0 || p >= g_free.value || g_cells[p].type != PAIR)
fprintf (f, "%s", g_cells[x].name);
else
display_ (f, g_cells[x].string);
fprintf (f, ">");
break;
}
case BROKEN_HEART: fprintf (f, "<3"); break;
default:
if (STRING (x))
{
SCM p = STRING (x);
assert (p);
while (p != cell_nil) {
assert (g_cells[car (p)].type == CHAR);
fputc (g_cells[car (p)].value, f);
p = cdr (p);
}
}
else if (g_cells[x].type != PAIR && g_cells[x].name) fprintf (f, "%s", g_cells[x].name);
}
return cell_unspecified;
}
// READ
FILE *g_stdin;
int
getchar ()
{
return getc (g_stdin);
}
int
ungetchar (int c)
{
return ungetc (c, g_stdin);
}
int
peekchar ()
{
int c = getchar ();
ungetchar (c);
return c;
}
SCM
peek_char ()
{
return make_char (peekchar ());
}
SCM
read_char ()
{
return make_char (getchar ());
}
SCM
write_char (SCM x) ///((arity . n))
{
SCM c = car (x);
SCM p = cdr (x);
int fd = 1;
if (g_cells[p].type == PAIR && g_cells[car (p)].type == NUMBER) fd = g_cells[car (p)].value;
FILE *f = fd == 1 ? stdout : stderr;
assert (g_cells[c].type == NUMBER || g_cells[c].type == CHAR);
fputc (value (c), f);
return c;
}
SCM
unget_char (SCM c)
{
assert (g_cells[c].type == NUMBER || g_cells[c].type == CHAR);
ungetchar (value (c));
return c;
}
int
readcomment (int c)
{
if (c == '\n') return c;
return readcomment (getchar ());
}
int
readblock (int c)
{
if (c == '!' && peekchar () == '#') return getchar ();
return readblock (getchar ());
}
SCM
readword (int c, SCM w, SCM a)
{
if (c == EOF && w == cell_nil) return cell_nil;
if (c == '\n' && w == cell_nil) return readword (getchar (), w, a);
if (c == '\n' && value (car (w)) == '.' && cdr (w) == cell_nil) return cell_dot;
if (c == EOF || c == '\n') return lookup (w, a);
if (c == ' ') return readword ('\n', w, a);
if (c == '"' && w == cell_nil) return readstring ();
if (c == '"') {ungetchar (c); return lookup (w, a);}
if (c == '(' && w == cell_nil) return readlist (a);
if (c == '(') {ungetchar (c); return lookup (w, a);}
if (c == ')' && w == cell_nil) {ungetchar (c); return cell_nil;}
if (c == ')') {ungetchar (c); return lookup (w, a);}
if (c == ',' && peekchar () == '@') {getchar (); return cons (lookup (g_cells[cell_symbol_unquote_splicing].string, a),
cons (readword (getchar (), w, a),
cell_nil));}
if ((c == '\''
|| c == '`'
|| c == ',')
&& w == cell_nil) {return cons (lookup_char (c, a),
cons (readword (getchar (), w, a),
cell_nil));}
if (c == '#' && peekchar () == ',' && w == cell_nil) {
getchar ();
if (peekchar () == '@'){getchar (); return cons (lookup (g_cells[cell_symbol_unsyntax_splicing].string, a),
cons (readword (getchar (), w, a),
cell_nil));}
return cons (lookup (g_cells[cell_symbol_unsyntax].string, a), cons (readword (getchar (), w, a), cell_nil));
}
if (c == '#' && (peekchar () == '\'' || peekchar () == '`') && w == cell_nil) {
c = getchar ();
return cons (lookup (cons (make_char ('#'), cons (make_char (c), cell_nil)), a),
cons (readword (getchar (), w, a), cell_nil));}
if (c == ';') {readcomment (c); return readword ('\n', w, a);}
if (c == '#' && peekchar () == 'x') {getchar (); return read_hex ();}
if (c == '#' && peekchar () == '\\') {getchar (); return read_character ();}
if (c == '#' && w == cell_nil && peekchar () == '(') {getchar (); return list_to_vector (readlist (a));}
if (c == '#' && peekchar () == '(') {ungetchar (c); return lookup (w, a);}
if (c == '#' && peekchar () == '!') {getchar (); readblock (getchar ()); return readword (getchar (), w, a);}
return readword (getchar (), append2 (w, cons (make_char (c), cell_nil)), a);
}
SCM
read_hex ()
{
int n = 0;
int c = peekchar ();
while ((c >= '0' && c <= '9')
|| (c >= 'A' && c <= 'F')
|| (c >= 'a' && c <= 'f')) {
n <<= 4;
if (c >= 'a') n += c - 'a' + 10;
else if (c >= 'A') n += c - 'A' + 10;
else n+= c - '0';
getchar ();
c = peekchar ();
}
return make_number (n);
}
SCM
read_character ()
{
int c = getchar ();
if (c >= '0' && c <= '7'
&& peekchar () >= '0' && peekchar () <= '7') {
c = c - '0';
while (peekchar () >= '0' && peekchar () <= '7') {
c <<= 3;
c += getchar () - '0';
}
}
else if (c >= 'a' && c <= 'z'
&& peekchar () >= 'a' && peekchar () <= 'z') {
char buf[10];
char *p = buf;
*p++ = c;
while (peekchar () >= 'a' && peekchar () <= 'z') {
*p++ = getchar ();
}
*p = 0;
if (!strcmp (buf, char_nul.name)) c = char_nul.value;
else if (!strcmp (buf, char_backspace.name)) c = char_backspace.value;
else if (!strcmp (buf, char_tab.name)) c = char_tab.value;
else if (!strcmp (buf, char_newline.name)) c = char_newline.value;
else if (!strcmp (buf, char_vt.name)) c = char_vt.value;
else if (!strcmp (buf, char_page.name)) c = char_page.value;
else if (!strcmp (buf, char_return.name)) c = char_return.value;
else if (!strcmp (buf, char_space.name)) c = char_space.value;
else {
fprintf (stderr, "char not supported: %s\n", buf);
assert (!"char not supported");
}
}
return make_char (c);
}
SCM
append_char (SCM x, int i)
{
return append2 (x, cons (make_char (i), cell_nil));
}
SCM
readstring ()
{
SCM p = cell_nil;
int c = getchar ();
while (true) {
if (c == '"') break;
if (c == '\\' && peekchar () == '"') p = append_char (p, getchar ());
else if (c == '\\' && peekchar () == 'n') {getchar (); p = append_char (p, '\n');}
else if (c == EOF) assert (!"EOF in string");
else p = append_char (p, c);
c = getchar ();
}
return make_string (p);
}
int
eat_whitespace (int c)
{
while (c == ' ' || c == '\t' || c == '\n') c = getchar ();
if (c == ';') return eat_whitespace (readcomment (c));
if (c == '#' && peekchar () == '!') {getchar (); readblock (getchar ()); return eat_whitespace (getchar ());}
return c;
}
SCM
readlist (SCM a)
{
int c = getchar ();
c = eat_whitespace (c);
if (c == ')') return cell_nil;
SCM w = readword (c, cell_nil, a);
if (w == cell_dot)
return car (readlist (a));
return cons (w, readlist (a));
}
SCM
read_env (SCM a)
{
return readword (getchar (), cell_nil, a);
}
SCM
acons (SCM key, SCM value, SCM alist)
{
return cons (cons (key, value), alist);
}
SCM
add_environment (SCM a, char const *name, SCM x)
{
return acons (make_symbol (cstring_to_list (name)), x, a);
}
SCM
mes_environment () ///((internal))
{
// setup GC
g_cells = (scm *)malloc (ARENA_SIZE*sizeof(scm));
g_cells[0].type = VECTOR;
g_cells[0].length = ARENA_SIZE - 1;
g_cells[0].length = 10;
g_cells[0].vector = 0;
g_cells++;
// a = add_environment (a, "%free", &g_free); hihi, gets <3 moved
// a = add_environment (a, "%the-cells", g_cells);
// a = add_environment (a, "%new-cells", g_news);
//#include "mes.symbols.i"
g_cells[0].type = CHAR;
g_cells[0].value = 'c';
g_free.value = 1; // 0 is tricky
#if !MES_MINI
#include "mes.symbols.i"
#else // MES_MINI
cell_nil = g_free.value++;
g_cells[cell_nil] = scm_nil;
cell_f = g_free.value++;
g_cells[cell_f] = scm_f;
cell_t = g_free.value++;
g_cells[cell_t] = scm_t;
cell_undefined = g_free.value++;
g_cells[cell_undefined] = scm_undefined;
cell_unspecified = g_free.value++;
g_cells[cell_unspecified] = scm_unspecified;
cell_closure = g_free.value++;
g_cells[cell_closure] = scm_closure;
cell_begin = g_free.value++;
g_cells[cell_begin] = scm_begin;
cell_symbol_begin = g_free.value++;
g_cells[cell_symbol_begin] = scm_symbol_begin;
cell_symbol_sc_expander_alist = g_free.value++;
g_cells[cell_symbol_sc_expander_alist] = scm_symbol_sc_expander_alist;
cell_symbol_sc_expand = g_free.value++;
g_cells[cell_symbol_sc_expand] = scm_symbol_sc_expand;
// cell_dot = g_free.value++;
// g_cells[cell_dot] = scm_dot;
// cell_circular = g_free.value++;
// g_cells[cell_circular] = scm_circular;
// cell_symbol_lambda = g_free.value++;
// g_cells[cell_symbol_lambda] = scm_symbol_lambda;
// cell_symbol_if = g_free.value++;
// g_cells[cell_symbol_if] = scm_symbol_if;
// cell_symbol_define = g_free.value++;
// g_cells[cell_symbol_define] = scm_symbol_define;
// cell_symbol_define_macro = g_free.value++;
// g_cells[cell_symbol_define_macro] = scm_symbol_define_macro;
#endif // MES_MINI
SCM symbol_max = g_free.value;
#if MES_FULL
#include "define.i"
#include "lib.i"
#include "math.i"
#include "mes.i"
#include "posix.i"
#include "quasiquote.i"
#include "string.i"
#include "type.i"
#else
cell_cons = g_free.value++;
cell_display = g_free.value++;
cell_eq_p = g_free.value++;
cell_newline = g_free.value++;
g_cells[cell_cons] = scm_cons;
g_cells[cell_display] = scm_display;
g_cells[cell_eq_p] = scm_eq_p;
g_cells[cell_newline] = scm_newline;
cell_make_vector = g_free.value++;
g_cells[cell_make_vector] = scm_make_vector;
#endif
tmp = g_free.value++;
tmp_num = g_free.value++;
g_cells[tmp_num].type = NUMBER;
tmp_num2 = g_free.value++;
g_cells[tmp_num2].type = NUMBER;
g_start = g_free.value;
symbols = 0;
for (int i=1; i<symbol_max; i++)
symbols = cons (i, symbols);
SCM a = cell_nil;
#if MES_FULL
#include "define.environment.i"
#include "lib.environment.i"
#include "math.environment.i"
#include "mes.environment.i"
#include "posix.environment.i"
//#include "quasiquote.environment.i"
#include "string.environment.i"
#include "type.environment.i"
#else // !MES_FULL
a = add_environment (a, "cons", cell_cons);
a = add_environment (a, "display", cell_display);
a = add_environment (a, "eq?", cell_eq_p);
a = add_environment (a, "newline", cell_newline);
a = add_environment (a, "make-vector", cell_make_vector);
#if !MES_MINI
a = add_environment (a, "*", cell_multiply);
a = add_environment (a, "list", cell_list);
//
a = add_environment (a, "car", cell_car);
a = add_environment (a, "cdr", cell_cdr);
a = add_environment (a, "+", cell_plus);
a = add_environment (a, "quote", cell_quote);
a = add_environment (a, "null?", cell_null_p);
a = add_environment (a, "=", cell_is_p);
// a = add_environment (a, "gc", cell_gc);
// a = add_environment (a, "apply-env", cell_apply_env);
// a = add_environment (a, "eval-env", cell_eval_env);
// a = add_environment (a, "cadr", cell_cadr);
#endif // !MES_MINI
#endif // !MES_FULL
#if BOOT
////symbols = cons (cell_symbol_label, symbols);
a = cons (cons (cell_symbol_label, cell_t), a);
#endif
a = cons (cons (cell_symbol_begin, cell_begin), a);
a = add_environment (a, "sc-expand", cell_f);
a = cons (cons (cell_closure, a), a);
internal_lookup_symbol (cell_nil);
r0 = a;
r1 = make_char (0);
r2 = make_char (0);
r3 = make_char (0);
stack = cons (cell_nil, cell_nil);
return a;
}
SCM
make_lambda (SCM args, SCM body)
{
return cons (cell_symbol_lambda, cons (args, body));
}
SCM
make_closure (SCM args, SCM body, SCM a)
{
return cons (cell_closure, cons (cons (cell_circular, a), cons (args, body)));
}
SCM
lookup_macro (SCM x, SCM a)
{
if (g_cells[x].type != SYMBOL) return cell_f;
SCM m = assq_ref_cache (x, a);
if (macro_p (m) == cell_t) return MACRO (m);
return cell_f;
}
SCM
read_input_file_env (SCM e, SCM a)
{
if (e == cell_nil) return e;
return cons (e, read_input_file_env (read_env (a), a));
}
SCM
load_env (SCM a)
{
SCM p = read_input_file_env (read_env (a), a);
return begin_env (p, a);
}
#include "type.c"
#include "define.c"
#include "lib.c"
#include "math.c"
#include "posix.c"
#include "quasiquote.c"
#include "string.c"
int
main (int argc, char *argv[])
{
if (argc > 1 && !strcmp (argv[1], "--help")) return puts ("Usage: mes < FILE\n");
if (argc > 1 && !strcmp (argv[1], "--version")) return puts ("Mes 0.2\n");
g_stdin = stdin;
SCM a = mes_environment ();
display_ (stderr, load_env (a));
fputs ("", stderr);
fprintf (stderr, "\nstats: [%d]\n", g_free.value);
return 0;
}
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