1124 lines
28 KiB
C
1124 lines
28 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017 Jan Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of Mes.
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*
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* Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#define _GNU_SOURCE
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#if __GNUC__
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#define __NYACC__ 0
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#define NYACC
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#define NYACC2
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#else
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typedef int bool;
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#define __NYACC__ 1
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#define NYACC nyacc
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#define NYACC2 nyacc2
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#endif
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#define DEBUG 0
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#define FIXED_PRIMITIVES 1
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int ARENA_SIZE = 100000;
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int MAX_ARENA_SIZE = 20000000;
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//int GC_SAFETY_DIV = 400;
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//int GC_SAFETY = ARENA_SIZE / 400;
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int GC_SAFETY = 250;
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typedef int SCM;
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enum type_t {TCHAR, TCLOSURE, TCONTINUATION, TFUNCTION, TKEYWORD, TMACRO, TNUMBER, TPAIR, TREF, TSPECIAL, TSTRING, TSYMBOL, TVALUES, TVECTOR, TBROKEN_HEART};
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typedef SCM (*function0_t) (void);
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typedef SCM (*function1_t) (SCM);
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typedef SCM (*function2_t) (SCM, SCM);
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typedef SCM (*function3_t) (SCM, SCM, SCM);
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typedef SCM (*functionn_t) (SCM);
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struct function {
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union {
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function0_t function0;
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function1_t function1;
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function2_t function2;
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function3_t function3;
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functionn_t functionn;
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} NYACC;
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int arity;
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char const *name;
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};
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struct scm {
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enum type_t type;
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union {
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char const* name;
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SCM string;
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SCM car;
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SCM ref;
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int length;
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} NYACC;
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union {
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int value;
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int function;
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SCM cdr;
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SCM closure;
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SCM continuation;
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SCM macro;
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SCM vector;
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int hits;
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} NYACC2;
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};
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struct scm scm_nil = {TSPECIAL, "()",0};
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struct scm scm_f = {TSPECIAL, "#f",0};
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struct scm scm_t = {TSPECIAL, "#t",0};
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struct scm scm_dot = {TSPECIAL, ".",0};
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struct scm scm_arrow = {TSPECIAL, "=>",0};
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struct scm scm_undefined = {TSPECIAL, "*undefined*",0};
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struct scm scm_unspecified = {TSPECIAL, "*unspecified*",0};
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struct scm scm_closure = {TSPECIAL, "*closure*",0};
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struct scm scm_circular = {TSPECIAL, "*circular*",0};
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struct scm scm_begin = {TSPECIAL, "*begin*",0};
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struct scm scm_symbol_dot = {TSYMBOL, "*dot*",0};
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struct scm scm_symbol_lambda = {TSYMBOL, "lambda",0};
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struct scm scm_symbol_begin = {TSYMBOL, "begin",0};
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struct scm scm_symbol_if = {TSYMBOL, "if",0};
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struct scm scm_symbol_quote = {TSYMBOL, "quote",0};
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struct scm scm_symbol_set_x = {TSYMBOL, "set!",0};
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struct scm scm_symbol_sc_expand = {TSYMBOL, "sc-expand",0};
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struct scm scm_symbol_macro_expand = {TSYMBOL, "macro-expand",0};
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struct scm scm_symbol_sc_expander_alist = {TSYMBOL, "*sc-expander-alist*",0};
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struct scm scm_symbol_call_with_values = {TSYMBOL, "call-with-values",0};
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struct scm scm_call_with_current_continuation = {TSPECIAL, "*call/cc*",0};
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struct scm scm_symbol_call_with_current_continuation = {TSYMBOL, "call-with-current-continuation",0};
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struct scm scm_symbol_current_module = {TSYMBOL, "current-module",0};
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struct scm scm_symbol_primitive_load = {TSYMBOL, "primitive-load",0};
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struct scm scm_symbol_read_input_file = {TSYMBOL, "read-input-file",0};
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struct scm scm_symbol_write = {TSYMBOL, "write",0};
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struct scm scm_symbol_display = {TSYMBOL, "display",0};
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struct scm scm_symbol_throw = {TSYMBOL, "throw",0};
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struct scm scm_symbol_not_a_pair = {TSYMBOL, "not-a-pair",0};
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struct scm scm_symbol_system_error = {TSYMBOL, "system-error",0};
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struct scm scm_symbol_wrong_number_of_args = {TSYMBOL, "wrong-number-of-args",0};
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struct scm scm_symbol_wrong_type_arg = {TSYMBOL, "wrong-type-arg",0};
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struct scm scm_symbol_unbound_variable = {TSYMBOL, "unbound-variable",0};
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struct scm scm_symbol_argv = {TSYMBOL, "%argv",0};
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struct scm scm_symbol_mes_prefix = {TSYMBOL, "%prefix",0};
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struct scm scm_symbol_mes_version = {TSYMBOL, "%version",0};
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struct scm scm_symbol_car = {TSYMBOL, "car",0};
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struct scm scm_symbol_cdr = {TSYMBOL, "cdr",0};
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struct scm scm_symbol_null_p = {TSYMBOL, "null?",0};
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struct scm scm_symbol_eq_p = {TSYMBOL, "eq?",0};
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struct scm scm_symbol_cons = {TSYMBOL, "cons",0};
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struct scm scm_vm_evlis = {TSPECIAL, "*vm-evlis*",0};
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struct scm scm_vm_evlis2 = {TSPECIAL, "*vm-evlis2*",0};
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struct scm scm_vm_evlis3 = {TSPECIAL, "*vm-evlis3*",0};
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struct scm scm_vm_apply = {TSPECIAL, "core:apply",0};
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struct scm scm_vm_apply2 = {TSPECIAL, "*vm-apply2*",0};
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struct scm scm_vm_eval = {TSPECIAL, "core:eval",0};
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//FIXED_PRIMITIVES
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struct scm scm_vm_eval_car = {TSPECIAL, "*vm-eval-car*",0};
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struct scm scm_vm_eval_cdr = {TSPECIAL, "*vm-eval-cdr*",0};
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struct scm scm_vm_eval_cons = {TSPECIAL, "*vm-eval-cons*",0};
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struct scm scm_vm_eval_null_p = {TSPECIAL, "*vm-eval-null-p*",0};
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struct scm scm_vm_eval_set_x = {TSPECIAL, "*vm-eval-set!*",0};
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struct scm scm_vm_eval_macro = {TSPECIAL, "*vm-eval-macro*",0};
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struct scm scm_vm_eval_check_func = {TSPECIAL, "*vm-eval-check-func*",0};
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struct scm scm_vm_eval2 = {TSPECIAL, "*vm-eval2*",0};
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struct scm scm_vm_macro_expand = {TSPECIAL, "core:macro-expand",0};
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struct scm scm_vm_begin = {TSPECIAL, "*vm-begin*",0};
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struct scm scm_vm_begin_read_input_file = {TSPECIAL, "*vm-begin-read-input-file*",0};
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struct scm scm_vm_begin2 = {TSPECIAL, "*vm-begin2*",0};
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struct scm scm_vm_if = {TSPECIAL, "*vm-if*",0};
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struct scm scm_vm_if_expr = {TSPECIAL, "*vm-if-expr*",0};
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struct scm scm_vm_call_with_values2 = {TSPECIAL, "*vm-call-with-values2*",0};
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struct scm scm_vm_call_with_current_continuation2 = {TSPECIAL, "*vm-call-with-current-continuation2*",0};
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struct scm scm_vm_return = {TSPECIAL, "*vm-return*",0};
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struct scm scm_symbol_gnuc = {TSYMBOL, "%gnuc",0};
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struct scm scm_symbol_mesc = {TSYMBOL, "%mesc",0};
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struct scm scm_test = {TSYMBOL, "test",0};
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int g_free = 0;
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struct scm *g_cells;
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struct scm *g_news = 0;
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SCM g_symbol_max;
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bool g_debug = false;
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#include "mes.symbols.h"
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SCM tmp;
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SCM tmp_num;
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SCM tmp_num2;
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struct function g_functions[200];
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int g_function = 0;
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SCM g_continuations = 0;
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SCM g_symbols = 0;
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SCM g_stack = 0;
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SCM r0 = 0; // a/env
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SCM r1 = 0; // param 1
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SCM r2 = 0; // save 2+load/dump
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SCM r3 = 0; // continuation
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#include "gc.h"
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#include "lib.h"
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#include "math.h"
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#include "mes.h"
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#include "posix.h"
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#include "reader.h"
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#include "vector.h"
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#define CAR(x) g_cells[x].car
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#define CDR(x) g_cells[x].cdr
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#define CONTINUATION(x) g_cells[x].cdr
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#define HITS(x) g_cells[x].hits
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#define LENGTH(x) g_cells[x].length
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#define NAME(x) g_cells[x].name
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#define STRING(x) g_cells[x].string
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#define TYPE(x) g_cells[x].type
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#define CLOSURE(x) g_cells[x].closure
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#define MACRO(x) g_cells[x].macro
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#define REF(x) g_cells[x].ref
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#define VALUE(x) g_cells[x].value
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#define VECTOR(x) g_cells[x].vector
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#define FUNCTION(x) g_functions[g_cells[x].function]
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#define NTYPE(x) g_news[x].type
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#define NCAR(x) g_news[x].car
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#define NLENGTH(x) g_news[x].length
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#define NCDR(x) g_news[x].cdr
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#define NVALUE(x) g_news[x].value
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#define NVECTOR(x) g_news[x].vector
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#define CAAR(x) CAR (CAR (x))
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#define CADR(x) CAR (CDR (x))
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#define CDAR(x) CDR (CAR (x))
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#define CDDR(x) CDR (CDR (x))
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#define CADAR(x) CAR (CDR (CAR (x)))
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#define CADDR(x) CAR (CDR (CDR (x)))
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#define CDDDR(x) CDR (CDR (CDR (x)))
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#define CDADAR(x) CAR (CDR (CAR (CDR (x))))
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#define MAKE_CHAR(n) make_cell_ (tmp_num_ (TCHAR), 0, tmp_num2_ (n))
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#define MAKE_CONTINUATION(n) make_cell_ (tmp_num_ (TCONTINUATION), n, g_stack)
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#define MAKE_NUMBER(n) make_cell_ (tmp_num_ (TNUMBER), 0, tmp_num2_ (n))
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#define MAKE_REF(n) make_cell_ (tmp_num_ (TREF), n, 0)
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#define MAKE_STRING(x) make_cell_ (tmp_num_ (TSTRING), x, 0)
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SCM vm_call (function0_t f, SCM p1, SCM a);
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char const* itoa(int);
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#define eputs(s) fputs(s, stderr)
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SCM
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tmp_num_ (int x)
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{
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g_cells[tmp_num].value = x;
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return tmp_num;
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}
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SCM
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tmp_num2_ (int x)
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{
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g_cells[tmp_num2].value = x;
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return tmp_num2;
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}
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SCM
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alloc (int n)
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{
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assert (g_free + n < ARENA_SIZE);
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SCM x = g_free;
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g_free += n;
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return x;
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}
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SCM
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make_cell_ (SCM type, SCM car, SCM cdr)
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{
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SCM x = alloc (1);
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assert (TYPE (type) == TNUMBER);
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TYPE (x) = VALUE (type);
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if (VALUE (type) == TCHAR || VALUE (type) == TNUMBER) {
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if (car) CAR (x) = CAR (car);
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if (cdr) CDR (x) = CDR (cdr);
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} else if (VALUE (type) == TFUNCTION) {
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if (car) CAR (x) = car;
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if (cdr) CDR (x) = CDR (cdr);
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} else {
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CAR (x) = car;
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CDR (x) = cdr;
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}
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return x;
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}
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SCM
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make_symbol_ (SCM s)
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{
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g_cells[tmp_num].value = TSYMBOL;
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SCM x = make_cell_ (tmp_num, s, 0);
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g_symbols = cons (x, g_symbols);
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return x;
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}
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SCM
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list_of_char_equal_p (SCM a, SCM b) ///((internal))
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{
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while (a != cell_nil && b != cell_nil && VALUE (car (a)) == VALUE (car (b))) {
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assert (TYPE (car (a)) == TCHAR);
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assert (TYPE (car (b)) == TCHAR);
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a = cdr (a);
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b = cdr (b);
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}
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return (a == cell_nil && b == cell_nil) ? cell_t : cell_f;
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}
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SCM
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lookup_symbol_ (SCM s)
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{
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SCM x = g_symbols;
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while (x) {
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if (list_of_char_equal_p (STRING (car (x)), s) == cell_t) break;
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x = cdr (x);
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}
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if (x) x = car (x);
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if (!x) x = make_symbol_ (s);
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return x;
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}
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SCM
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type_ (SCM x)
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{
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return MAKE_NUMBER (TYPE (x));
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}
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SCM
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car_ (SCM x)
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{
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return (TYPE (x) != TCONTINUATION
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&& (TYPE (CAR (x)) == TPAIR // FIXME: this is weird
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|| TYPE (CAR (x)) == TREF
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|| TYPE (CAR (x)) == TSPECIAL
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|| TYPE (CAR (x)) == TSYMBOL
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|| TYPE (CAR (x)) == TSTRING)) ? CAR (x) : MAKE_NUMBER (CAR (x));
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}
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SCM
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cdr_ (SCM x)
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{
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return (TYPE (CDR (x)) == TPAIR
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|| TYPE (CDR (x)) == TREF
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|| TYPE (CAR (x)) == TSPECIAL
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|| TYPE (CDR (x)) == TSYMBOL
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|| TYPE (CDR (x)) == TSTRING) ? CDR (x) : MAKE_NUMBER (CDR (x));
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}
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SCM
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arity_ (SCM x)
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{
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assert (TYPE (x) == TFUNCTION);
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return MAKE_NUMBER (FUNCTION (x).arity);
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}
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SCM
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cons (SCM x, SCM y)
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{
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g_cells[tmp_num].value = TPAIR;
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return make_cell_ (tmp_num, x, y);
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}
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SCM
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car (SCM x)
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||
{
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||
if (TYPE (x) != TPAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_car));
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return CAR (x);
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}
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SCM
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cdr (SCM x)
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{
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if (TYPE (x) != TPAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_cdr));
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return CDR (x);
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}
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SCM
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list (SCM x) ///((arity . n))
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||
{
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||
return x;
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||
}
|
||
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||
SCM
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||
null_p (SCM x)
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||
{
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||
return x == cell_nil ? cell_t : cell_f;
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||
}
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SCM
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||
eq_p (SCM x, SCM y)
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||
{
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||
return (x == y
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|| ((TYPE (x) == TKEYWORD && TYPE (y) == TKEYWORD
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&& STRING (x) == STRING (y)))
|
||
|| (TYPE (x) == TCHAR && TYPE (y) == TCHAR
|
||
&& VALUE (x) == VALUE (y))
|
||
|| (TYPE (x) == TNUMBER && TYPE (y) == TNUMBER
|
||
&& VALUE (x) == VALUE (y)))
|
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? cell_t : cell_f;
|
||
}
|
||
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SCM
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values (SCM x) ///((arity . n))
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||
{
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||
SCM v = cons (0, x);
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||
TYPE (v) = TVALUES;
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||
return v;
|
||
}
|
||
|
||
SCM
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||
acons (SCM key, SCM value, SCM alist)
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||
{
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||
return cons (cons (key, value), alist);
|
||
}
|
||
|
||
// MIMI_MES lib.c?
|
||
SCM
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||
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 apply (SCM, SCM, SCM);
|
||
|
||
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_error_ (key);
|
||
eputs (": ");
|
||
display_error_ (x);
|
||
eputs ("\n");
|
||
assert (!"error");
|
||
}
|
||
|
||
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
|
||
append2 (SCM x, SCM y)
|
||
{
|
||
if (x == cell_nil) return y;
|
||
assert (TYPE (x) == TPAIR);
|
||
return cons (car (x), append2 (cdr (x), y));
|
||
}
|
||
|
||
SCM
|
||
pairlis (SCM x, SCM y, SCM a)
|
||
{
|
||
if (x == cell_nil)
|
||
return a;
|
||
if (TYPE (x) != TPAIR)
|
||
return cons (cons (x, y), a);
|
||
return cons (cons (car (x), car (y)),
|
||
pairlis (cdr (x), cdr (y), a));
|
||
}
|
||
|
||
SCM
|
||
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).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
|
||
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_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)
|
||
{
|
||
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 assert_defined (SCM, SCM);
|
||
|
||
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);
|
||
r1 = e;
|
||
r0 = cl;
|
||
return cell_unspecified;
|
||
}
|
||
|
||
SCM
|
||
make_closure_ (SCM args, SCM body, SCM a) ///((internal))xs
|
||
{
|
||
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 check_apply (SCM, SCM);
|
||
SCM check_formals (SCM, SCM, SCM);
|
||
SCM push_cc (SCM, SCM, SCM, SCM);
|
||
SCM gc_pop_frame ();
|
||
SCM gc_push_frame ();
|
||
|
||
SCM
|
||
eval_apply ()
|
||
{
|
||
eval_apply:
|
||
gc_check ();
|
||
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_eval_check_func: goto eval_check_func;
|
||
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:
|
||
gc_check ();
|
||
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;
|
||
|
||
apply:
|
||
gc_check ();
|
||
switch (TYPE (car (r1)))
|
||
{
|
||
case TFUNCTION: {
|
||
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 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;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
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:
|
||
gc_check ();
|
||
switch (TYPE (r1))
|
||
{
|
||
case TPAIR:
|
||
{
|
||
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) == TPAIR)
|
||
{
|
||
set_cdr_x (r2, cdr (r1));
|
||
set_car_x (r2, car (r1));
|
||
}
|
||
goto eval;
|
||
}
|
||
push_cc (car (r1), r1, r0, cell_vm_eval_check_func); goto eval;
|
||
eval_check_func:
|
||
push_cc (CDR (r2), r2, r0, cell_vm_eval2); goto evlis;
|
||
eval2:
|
||
r1 = cons (car (r2), r1);
|
||
goto apply;
|
||
}
|
||
}
|
||
}
|
||
case TSYMBOL:
|
||
{
|
||
r1 = assert_defined (r1, assq_ref_env (r1, r0));
|
||
goto vm_return;
|
||
}
|
||
default: goto vm_return;
|
||
}
|
||
|
||
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;
|
||
|
||
begin:
|
||
x = cell_unspecified;
|
||
while (r1 != cell_nil) {
|
||
gc_check ();
|
||
if (TYPE (r1) == TPAIR && TYPE (CAR (r1)) == TPAIR)
|
||
{
|
||
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) == TVALUES)
|
||
r1 = CDR (r1);
|
||
r1 = cons (CADR (r2), r1);
|
||
goto apply;
|
||
|
||
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;
|
||
}
|
||
|
||
SCM
|
||
gc_pop_frame () ///((internal))
|
||
{
|
||
SCM frame = gc_peek_frame (g_stack);
|
||
g_stack = cdr (g_stack);
|
||
return frame;
|
||
}
|
||
|
||
SCM
|
||
gc_push_frame () ///((internal))
|
||
{
|
||
SCM frame = cons (r1, cons (r2, cons (r3, cons (r0, cell_nil))));
|
||
return g_stack = cons (frame, g_stack);
|
||
}
|
||
|
||
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
|
||
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 ();
|
||
}
|
||
|
||
void
|
||
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;
|
||
}
|
||
|
||
// Environment setup
|
||
SCM
|
||
gc_init_cells () ///((internal))
|
||
{
|
||
g_cells = (struct scm *)malloc (2*ARENA_SIZE*sizeof(struct scm));
|
||
g_cells[0].type = TVECTOR;
|
||
g_cells[0].length = 1000;
|
||
g_cells[0].vector = 0;
|
||
g_cells++;
|
||
g_cells[0].type = TCHAR;
|
||
g_cells[0].value = 'c';
|
||
}
|
||
|
||
SCM
|
||
gc_init_news () ///((internal))
|
||
{
|
||
g_news = g_cells-1 + ARENA_SIZE;
|
||
g_news[0].type = TVECTOR;
|
||
g_news[0].length = 1000;
|
||
g_news[0].vector = 0;
|
||
g_news++;
|
||
g_news[0].type = TCHAR;
|
||
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_values, cell_symbol_call_with_values, a);
|
||
a = acons (cell_symbol_current_module, cell_symbol_current_module, 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_builtins (SCM a) ///((internal))
|
||
{
|
||
#include "mes.i"
|
||
|
||
// Do not sort: Order of these includes define builtins
|
||
#include "posix.i"
|
||
#include "math.i"
|
||
#include "lib.i"
|
||
#include "vector.i"
|
||
#include "gc.i"
|
||
#include "reader.i"
|
||
|
||
#include "gc.environment.i"
|
||
#include "lib.environment.i"
|
||
#include "math.environment.i"
|
||
#include "mes.environment.i"
|
||
#include "posix.environment.i"
|
||
#include "reader.environment.i"
|
||
#include "vector.environment.i"
|
||
|
||
if (g_debug)
|
||
{
|
||
fputs ("functions: ", stderr);
|
||
fputs (itoa (g_function), stderr);
|
||
fputs ("\n", stderr);
|
||
for (int i = 0; i < g_function; i++)
|
||
{
|
||
fputs ("[", stderr);
|
||
fputs (itoa (i), stderr);
|
||
fputs ("]: ", stderr);
|
||
fputs (g_functions[i].name, stderr);
|
||
fputs ("\n", stderr);
|
||
}
|
||
fputs ("\n", stderr);
|
||
}
|
||
|
||
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);
|
||
}
|
||
|
||
int g_stdin;
|
||
#include "math.c"
|
||
#include "posix.c"
|
||
#include "lib.c"
|
||
#include "reader.c"
|
||
#include "gc.c"
|
||
#include "vector.c"
|
||
|
||
int
|
||
main (int argc, char *argv[])
|
||
{
|
||
#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 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);
|
||
|
||
if (g_debug) {eputs ("program: "); display_error_ (r2); eputs ("\n");}
|
||
push_cc (r2, cell_unspecified, r0, cell_unspecified);
|
||
r3 = cell_vm_begin;
|
||
r1 = eval_apply ();
|
||
display_error_ (r1);
|
||
fputs ("", stdout);
|
||
gc (g_stack);
|
||
#if __GNUC__
|
||
if (g_debug) fprintf (stderr, "\nstats: [%d]\n", g_free);
|
||
#else
|
||
#endif
|
||
return 0;
|
||
}
|