778 lines
15 KiB
C
778 lines
15 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 MES_MINI 1
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#if __GNUC__
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#define FIXME_NYACC 1
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#define __NYACC__ 0
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#define NYACC_CAR
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#define NYACC_CDR
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#else
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#define __NYACC__ 1
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#define NYACC_CAR nyacc_car
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#define NYACC_CDR nyacc_cdr
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#endif
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typedef long size_t;
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void *malloc (size_t i);
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#if __GNUC__
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int
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open (char const *s, int mode)
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{
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//return syscall (SYS_open, s, mode);
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return 0;
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}
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int
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read (int fd, int n)
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{
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//syscall (SYS_read, 1, 1);
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return 0;
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}
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void
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write (int fd, char const* s, int n)
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{
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int r;
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//syscall (SYS_write, fd, s, n));
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asm (
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"mov %0, %%ebx\n\t"
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"mov %1, %%ecx\n\t"
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"mov %2, %%edx\n\t"
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"mov $0x4, %%eax\n\t"
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"int $0x80\n\t"
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: // no outputs "=" (r)
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: "" (fd), "" (s), "" (n)
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: "eax", "ebx", "ecx", "edx"
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);
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}
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void *
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malloc (size_t size)
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{
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int *n;
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int len = size + sizeof (size);
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//n = mmap (0, len, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0 );
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*n = len;
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return (void*)(n+1);
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}
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void
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free (void *p)
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{
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int *n = (int*)p-1;
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//munmap ((void*)p, *n);
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}
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#endif // __GNUC__
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#define EOF -1
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#define STDIN 0
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#define STDOUT 1
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#define STDERR 2
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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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int g_stdin;
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size_t
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strlen (char const* s)
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{
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int i = 0;
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while (s[i]) i++;
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return i;
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}
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int
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strcmp (char const* a, char const* b)
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{
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while (*a && *b && *a == *b) {a++;b++;}
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return *a - *b;
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}
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int
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getc ()
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{
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return read (g_stdin, 1);
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}
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int
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puts (char const* s)
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{
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write (STDOUT, s, strlen (s));
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return 0;
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}
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int
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eputs (char const* s)
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{
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write (STDERR, s, strlen (s));
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return 0;
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}
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char const*
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itoa (int x)
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{
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static char buf[10];
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char *p = buf+9;
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*p-- = 0;
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int sign = x < 0;
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if (sign)
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x = -x;
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do
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{
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*p-- = '0' + (x % 10);
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x = x / 10;
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} while (x);
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if (sign)
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*p-- = '-';
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return p+1;
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}
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void
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assert_fail (char* s)
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{
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eputs ("assert fail:");
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eputs (s);
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eputs ("\n");
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*((int*)0) = 0;
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}
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#if __NYACC__ || FIXME_NYACC
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#define assert(x) ((x) ? (void)0 : assert_fail(0))
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// #else
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// NYACC
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// #define assert(x) ((x) ? (void)0 : assert_fail(#x))
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#endif
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#define false 0
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#define true 1
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typedef int bool;
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int ARENA_SIZE = 100000;
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typedef int SCM;
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#if __NYACC__ || FIXME_NYACC
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enum type_t {CHAR, CLOSURE, CONTINUATION, FUNCTION, KEYWORD, MACRO, NUMBER, PAIR, REF, SPECIAL, TSTRING, SYMBOL, VALUES, TVECTOR, BROKEN_HEART};
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#else
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enum type_t {CHAR, CLOSURE, CONTINUATION, FUNCTION, KEYWORD, MACRO, NUMBER, PAIR, REF, SPECIAL, STRING, SYMBOL, VALUES, VECTOR, BROKEN_HEART};
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#endif
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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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typedef struct function_struct {
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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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} data;
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int arity;
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} function_t;
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struct scm;
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typedef struct scm_struct {
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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_CAR;
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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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} NYACC_CDR;
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} scm;
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scm scm_nil = {SPECIAL, "()"};
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scm scm_f = {SPECIAL, "#f"};
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scm scm_t = {SPECIAL, "#t"};
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scm scm_dot = {SPECIAL, "."};
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scm scm_arrow = {SPECIAL, "=>"};
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scm scm_undefined = {SPECIAL, "*undefined*"};
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scm scm_unspecified = {SPECIAL, "*unspecified*"};
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scm scm_closure = {SPECIAL, "*closure*"};
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scm scm_circular = {SPECIAL, "*circular*"};
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scm scm_begin = {SPECIAL, "*begin*"};
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//#include "mes.symbols.h"
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#define cell_nil 1
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#define cell_f 2
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#define cell_t 3
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#define cell_dot 4
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#define cell_arrow 5
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#define cell_undefined 6
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#define cell_unspecified 7
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#define cell_closure 8
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#define cell_circular 9
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#define cell_begin 10
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#define cell_symbol_dot 11
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#define cell_symbol_lambda 12
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#define cell_symbol_begin 13
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#define cell_symbol_if 14
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#define cell_symbol_quote 15
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#define cell_symbol_set_x 16
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#if __GNUC__
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bool g_debug = false;
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#endif
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int g_free = 0;
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scm *g_cells;
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//scm *g_news = 0;
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SCM tmp;
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SCM tmp_num;
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SCM tmp_num2;
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function_t functions[200];
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int g_function = 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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SCM make_cell (SCM type, SCM car, SCM cdr);
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function_t fun_make_cell = {&make_cell, 3};
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scm scm_make_cell = {FUNCTION, "make-cell", 0};
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SCM cell_make_cell;
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SCM cons (SCM x, SCM y);
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function_t fun_cons = {&cons, 2};
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scm scm_cons = {FUNCTION, "cons", 0};
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SCM cell_cons;
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SCM car (SCM x);
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function_t fun_car = {&car, 1};
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scm scm_car = {FUNCTION, "car", 0};
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SCM cell_car;
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SCM cdr (SCM x);
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function_t fun_cdr = {&cdr, 1};
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scm scm_cdr = {FUNCTION, "cdr", 0};
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SCM cell_cdr;
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// SCM eq_p (SCM x, SCM y);
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// function_t fun_eq_p = {&eq_p, 2};
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// scm scm_eq_p = {FUNCTION, "eq?", 0};
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// SCM cell_eq_p;
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#define TYPE(x) (g_cells[x].type)
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#define CAR(x) g_cells[x].car
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#define LENGTH(x) g_cells[x].length
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#define STRING(x) g_cells[x].string
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#define CDR(x) g_cells[x].cdr
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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 MAKE_CHAR(n) make_cell (tmp_num_ (CHAR), 0, tmp_num2_ (n))
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//#define MAKE_CONTINUATION(n) make_cell (tmp_num_ (CONTINUATION), n, g_stack)
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//#define MAKE_NUMBER(n) make_cell (tmp_num_ (NUMBER), 0, tmp_num2_ (n))
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//#define MAKE_REF(n) make_cell (tmp_num_ (REF), n, 0)
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#if __NYACC__ || FIXME_NYACC
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#define MAKE_STRING(x) make_cell (tmp_num_ (TSTRING), x, 0)
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// #else
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// #define MAKE_STRING(x) make_cell (tmp_num_ (STRING), x, 0)
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#endif
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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) == NUMBER);
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TYPE (x) = VALUE (type);
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if (VALUE (type) == CHAR || VALUE (type) == NUMBER) {
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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) == FUNCTION) {
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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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tmp_num_ (int x)
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{
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VALUE (tmp_num) = 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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VALUE (tmp_num2) = x;
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return tmp_num2;
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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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VALUE (tmp_num) = PAIR;
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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 MES_MINI
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//Nyacc
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//assert ("!car");
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#else
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if (TYPE (x) != PAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_car));
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#endif
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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 MES_MINI
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//Nyacc
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//assert ("!cdr");
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#else
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if (TYPE (x) != PAIR) error (cell_symbol_not_a_pair, cons (x, cell_symbol_cdr));
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#endif
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return CDR(x);
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}
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SCM
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gc_push_frame ()
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{
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SCM frame = cons (r1, cons (r2, cons (r3, cons (r0, cell_nil))));
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return g_stack = cons (frame, g_stack);
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}
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SCM
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push_cc (SCM p1, SCM p2, SCM a, SCM c) ///((internal))
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{
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SCM x = r3;
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r3 = c;
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r2 = p2;
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gc_push_frame ();
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r1 = p1;
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r0 = a;
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r3 = x;
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return cell_unspecified;
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}
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SCM caar (SCM x) {return car (car (x));}
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SCM cadr (SCM x) {return car (cdr (x));}
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SCM cdar (SCM x) {return cdr (car (x));}
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SCM cddr (SCM x) {return cdr (cdr (x));}
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SCM
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gc_peek_frame ()
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{
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SCM frame = car (g_stack);
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r1 = car (frame);
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r2 = cadr (frame);
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r3 = car (cddr (frame));
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r0 = cadr (cddr (frame));
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return frame;
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}
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SCM
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mes_g_stack (SCM a) ///((internal))
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{
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r0 = a;
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r1 = MAKE_CHAR (0);
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r2 = MAKE_CHAR (0);
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r3 = MAKE_CHAR (0);
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g_stack = cons (cell_nil, cell_nil);
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return r0;
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}
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// Environment setup
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SCM
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make_tmps (scm* cells)
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{
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tmp = g_free++;
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cells[tmp].type = CHAR;
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tmp_num = g_free++;
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cells[tmp_num].type = NUMBER;
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tmp_num2 = g_free++;
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cells[tmp_num2].type = NUMBER;
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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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VALUE (tmp_num) = SYMBOL;
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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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make_symbol (SCM s)
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{
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#if MES_MINI
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SCM x = 0;
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#else
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SCM x = lookup_symbol_ (s);
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#endif
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return x ? x : make_symbol_ (s);
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}
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SCM
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cstring_to_list (char const* s)
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{
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SCM p = cell_nil;
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int i = strlen (s);
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while (i--)
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p = cons (MAKE_CHAR (s[i]), p);
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return p;
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}
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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);
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}
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// Jam Collector
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SCM g_symbol_max;
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SCM
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gc_init_cells ()
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{
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g_cells = (scm *)malloc (2*ARENA_SIZE*sizeof(scm));
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#if __NYACC__ || FIXME_NYACC
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TYPE (0) = TVECTOR;
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// #else
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// TYPE (0) = VECTOR;
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#endif
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LENGTH (0) = 1000;
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VECTOR (0) = 0;
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g_cells++;
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TYPE (0) = CHAR;
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VALUE (0) = 'c';
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}
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// INIT NEWS
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SCM
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mes_symbols () ///((internal))
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{
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gc_init_cells ();
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// gc_init_news ();
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#if __GNUC__ && 0
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//#include "mes.symbols.i"
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#else
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g_free++;
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g_cells[cell_nil] = scm_nil;
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g_free++;
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g_cells[cell_f] = scm_f;
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g_free++;
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g_cells[cell_t] = scm_t;
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g_free++;
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g_cells[cell_dot] = scm_dot;
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g_free++;
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g_cells[cell_arrow] = scm_arrow;
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g_free++;
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g_cells[cell_undefined] = scm_undefined;
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g_free++;
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g_cells[cell_unspecified] = scm_unspecified;
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g_free++;
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g_cells[cell_closure] = scm_closure;
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g_free++;
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g_cells[cell_circular] = scm_circular;
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g_free++;
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g_cells[cell_begin] = scm_begin;
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#endif
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g_symbol_max = g_free;
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make_tmps (g_cells);
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g_symbols = 0;
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for (int i=1; i<g_symbol_max; i++)
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g_symbols = cons (i, g_symbols);
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SCM a = cell_nil;
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#if __GNUC__ && 0
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//#include "mes.symbol-names.i"
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#else
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g_cells[cell_nil].car = cstring_to_list (scm_nil.name);
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g_cells[cell_f].car = cstring_to_list (scm_f.name);
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g_cells[cell_t].car = cstring_to_list (scm_t.name);
|
||
g_cells[cell_dot].car = cstring_to_list (scm_dot.name);
|
||
g_cells[cell_arrow].car = cstring_to_list (scm_arrow.name);
|
||
g_cells[cell_undefined].car = cstring_to_list (scm_undefined.name);
|
||
g_cells[cell_unspecified].car = cstring_to_list (scm_unspecified.name);
|
||
g_cells[cell_closure].car = cstring_to_list (scm_closure.name);
|
||
g_cells[cell_circular].car = cstring_to_list (scm_circular.name);
|
||
g_cells[cell_begin].car = cstring_to_list (scm_begin.name);
|
||
#endif
|
||
|
||
// a = acons (cell_symbol_mes_version, MAKE_STRING (cstring_to_list (VERSION)), a);
|
||
// a = acons (cell_symbol_mes_prefix, MAKE_STRING (cstring_to_list (PREFIX)), a);
|
||
|
||
a = acons (cell_symbol_dot, cell_dot, a); //
|
||
a = acons (cell_symbol_begin, cell_begin, a);
|
||
a = acons (cell_closure, a, a);
|
||
|
||
// a = acons (cell_symbol_call_with_current_continuation, cell_call_with_current_continuation, a);
|
||
// a = acons (cell_symbol_sc_expand, cell_f, a);
|
||
|
||
return a;
|
||
}
|
||
|
||
SCM
|
||
mes_environment () ///((internal))
|
||
{
|
||
SCM a = mes_symbols ();
|
||
return mes_g_stack (a);
|
||
}
|
||
|
||
SCM
|
||
mes_builtins (SCM a)
|
||
{
|
||
#if __GNUC__
|
||
//#include "mes.i"
|
||
|
||
// #include "lib.i"
|
||
// #include "math.i"
|
||
// #include "posix.i"
|
||
// #include "reader.i"
|
||
|
||
// #include "lib.environment.i"
|
||
// #include "math.environment.i"
|
||
// #include "mes.environment.i"
|
||
// #include "posix.environment.i"
|
||
// #include "reader.environment.i"
|
||
#else
|
||
scm_make_cell.function = g_function;
|
||
functions[g_function++] = fun_make_cell;
|
||
cell_make_cell = g_free++;
|
||
g_cells[cell_make_cell] = scm_make_cell;
|
||
|
||
scm_cons.function = g_function;
|
||
functions[g_function++] = fun_cons;
|
||
cell_cons = g_free++;
|
||
g_cells[cell_cons] = scm_cons;
|
||
|
||
scm_car.function = g_function;
|
||
functions[g_function++] = fun_car;
|
||
cell_car = g_free++;
|
||
g_cells[cell_car] = scm_car;
|
||
|
||
scm_cdr.function = g_function;
|
||
functions[g_function++] = fun_cdr;
|
||
cell_cdr = g_free++;
|
||
g_cells[cell_cdr] = scm_cdr;
|
||
|
||
scm_make_cell.string = cstring_to_list (scm_make_cell.name);
|
||
g_cells[cell_make_cell].string = MAKE_STRING (scm_make_cell.string);
|
||
a = acons (make_symbol (scm_make_cell.string), cell_make_cell, a);
|
||
|
||
scm_cons.string = cstring_to_list (scm_cons.name);
|
||
g_cells[cell_cons].string = MAKE_STRING (scm_cons.string);
|
||
a = acons (make_symbol (scm_cons.string), cell_cons, a);
|
||
|
||
scm_car.string = cstring_to_list (scm_car.name);
|
||
g_cells[cell_car].string = MAKE_STRING (scm_car.string);
|
||
a = acons (make_symbol (scm_car.string), cell_car, a);
|
||
|
||
scm_cdr.string = cstring_to_list (scm_cdr.name);
|
||
g_cells[cell_cdr].string = MAKE_STRING (scm_cdr.string);
|
||
a = acons (make_symbol (scm_cdr.string), cell_cdr, a);
|
||
#endif
|
||
return a;
|
||
}
|
||
|
||
int
|
||
getchar ()
|
||
{
|
||
return getc (g_stdin);
|
||
}
|
||
|
||
SCM
|
||
bload_env (SCM a) ///((internal))
|
||
{
|
||
g_stdin = open ("module/mes/read-0.mo", 0);
|
||
#if __GNUC__
|
||
//g_stdin = g_stdin ? g_stdin : fopen (PREFIX "module/mes/read-0.mo", "r");
|
||
#endif
|
||
char *p = (char*)g_cells;
|
||
assert (getchar () == 'M');
|
||
assert (getchar () == 'E');
|
||
assert (getchar () == 'S');
|
||
g_stack = getchar () << 8;
|
||
g_stack += getchar ();
|
||
int c = getchar ();
|
||
while (c != EOF)
|
||
{
|
||
*p++ = c;
|
||
c = getchar ();
|
||
}
|
||
g_free = (p-(char*)g_cells) / sizeof (scm);
|
||
gc_peek_frame ();
|
||
g_symbols = r1;
|
||
g_stdin = STDIN;
|
||
r0 = mes_builtins (r0);
|
||
return r2;
|
||
}
|
||
|
||
char const*
|
||
string_to_cstring (SCM s)
|
||
{
|
||
static char buf[1024];
|
||
char *p = buf;
|
||
s = STRING(s);
|
||
while (s != cell_nil)
|
||
{
|
||
*p++ = VALUE (car (s));
|
||
s = cdr (s);
|
||
}
|
||
*p = 0;
|
||
return buf;
|
||
}
|
||
|
||
SCM
|
||
stderr_ (SCM x)
|
||
{
|
||
//SCM write;
|
||
#if __NYACC__ || FIXME_NYACC
|
||
if (TYPE (x) == TSTRING)
|
||
// #else
|
||
// if (TYPE (x) == STRING)
|
||
#endif
|
||
eputs (string_to_cstring (x));
|
||
// else if ((write = assq_ref_cache (cell_symbol_write, r0)) != cell_undefined)
|
||
// apply (assq_ref_cache (cell_symbol_display, r0), cons (x, cons (MAKE_NUMBER (2), cell_nil)), r0);
|
||
#if __NYACC__ || FIXME_NYACC
|
||
else if (TYPE (x) == SPECIAL || TYPE (x) == TSTRING || TYPE (x) == SYMBOL)
|
||
// #else
|
||
// else if (TYPE (x) == SPECIAL || TYPE (x) == STRING || TYPE (x) == SYMBOL)
|
||
#endif
|
||
eputs (string_to_cstring (x));
|
||
else if (TYPE (x) == NUMBER)
|
||
eputs (itoa (VALUE (x)));
|
||
else
|
||
eputs ("display: undefined\n");
|
||
return cell_unspecified;
|
||
}
|
||
|
||
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 eputs ("Usage: mes [--dump|--load] < FILE");
|
||
if (argc > 1 && !strcmp (argv[1], "--version")) {eputs ("Mes ");return eputs (VERSION);};
|
||
g_stdin = STDIN;
|
||
r0 = mes_environment ();
|
||
|
||
#if MES_MINI
|
||
SCM program = bload_env (r0);
|
||
#else
|
||
SCM program = (argc > 1 && !strcmp (argv[1], "--load"))
|
||
? bload_env (r0) : load_env (r0);
|
||
if (argc > 1 && !strcmp (argv[1], "--dump")) return dump ();
|
||
#endif
|
||
|
||
push_cc (r2, cell_unspecified, r0, cell_unspecified);
|
||
// r3 = cell_vm_begin;
|
||
// r1 = eval_apply ();
|
||
stderr_ (r1);
|
||
|
||
eputs ("\n");
|
||
#if !MES_MINI
|
||
gc (g_stack);
|
||
#endif
|
||
#if __GNUC__
|
||
if (g_debug)
|
||
{
|
||
eputs ("\nstats: [");
|
||
eputs (itoa (g_free));
|
||
eputs ("]\n");
|
||
}
|
||
#endif
|
||
puts ("Hello mini-mes!\n");
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
_start ()
|
||
{
|
||
/* main body of program: call main(), etc */
|
||
|
||
/* exit system call */
|
||
asm (
|
||
"movl $1,%eax;"
|
||
"xorl %ebx,%ebx;"
|
||
"int $0x80"
|
||
);
|
||
}
|