64e73dcf29
* module/mes/elf.mes (make-elf): Only display data sections smaller than 200 bytes. * doc/examples/mini-mes.c (simple_bload_env): Read mini-0-32.mes. * doc/examples/cons-mes.c (display_): Support symbols and specials. * doc/examples/tiny-mes.c: Likewise. * lib.c: * mes.c:
593 lines
10 KiB
C
593 lines
10 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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char arena[200];
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int g_stdin = 0;
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#if __GNUC__
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typedef long size_t;
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void *malloc (size_t i);
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int open (char const *s, int mode);
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int read (int fd, void* buf, size_t n);
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void write (int fd, char const* s, int n);
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void
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exit (int code)
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{
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asm (
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"movl %0,%%ebx\n\t"
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"movl $1,%%eax\n\t"
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"int $0x80"
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: // no outputs "=" (r)
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: "" (code)
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);
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// not reached
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exit (0);
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}
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char const*
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getenv (char const* p)
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{
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return 0;
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}
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int
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read (int fd, void* buf, size_t 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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"movl %1,%%ebx\n\t"
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"movl %2,%%ecx\n\t"
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"movl %3,%%edx\n\t"
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"movl $0x3,%%eax\n\t"
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"int $0x80\n\t"
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"mov %%eax,%0\n\t"
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: "=r" (r)
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: "" (fd), "" (buf), "" (n)
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: "eax", "ebx", "ecx", "edx"
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);
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return r;
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}
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int
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open (char const *s, int mode)
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{
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int r;
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//syscall (SYS_open, mode));
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asm (
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"mov %1,%%ebx\n\t"
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"mov %2,%%ecx\n\t"
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"mov $0x5,%%eax\n\t"
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"int $0x80\n\t"
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"mov %%eax,%0\n\t"
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: "=r" (r)
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: "" (s), "" (mode)
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: "eax", "ebx", "ecx"
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);
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return r;
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}
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int
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getchar ()
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{
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char c;
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int r = read (g_stdin, &c, 1);
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if (r < 1) return -1;
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return c;
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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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int
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putchar (int c)
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{
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//write (STDOUT, s, strlen (s));
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//int i = write (STDOUT, s, strlen (s));
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write (1, (char*)&c, 1);
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return 0;
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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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#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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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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puts (char const* s)
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{
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//write (STDOUT, s, strlen (s));
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//int i = write (STDOUT, s, strlen (s));
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int i = strlen (s);
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write (1, s, i);
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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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//int i = write (STDERR, s, strlen (s));
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int i = strlen (s);
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write (2, s, i);
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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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#endif
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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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#if __GNUC__
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eputs (s);
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#endif
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eputs ("\n");
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#if __GNUC__
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*((int*)0) = 0;
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#endif
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}
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#if __GNUC__
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#define assert(x) ((x) ? (void)0 : assert_fail ("boo:" #x))
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#else
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//#define assert(x) ((x) ? (void)0 : assert_fail ("boo:" #x))
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#define assert(x) ((x) ? (void)0 : assert_fail (0))
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#endif
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typedef int SCM;
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#if __GNUC__
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int g_debug = 0;
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#endif
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int g_free = 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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#if __NYACC__ || FIXME_NYACC
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enum type_t {CHAR, CLOSURE, CONTINUATION, TFUNCTION, 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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struct scm {
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enum type_t type;
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SCM car;
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SCM cdr;
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};
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//char arena[200];
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//struct scm *g_cells = arena;
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//struct scm *g_cells = (struct scm*)arena;
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struct scm *g_cells = arena;
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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 TYPE(x) (g_cells[x].type)
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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 VALUE(x) g_cells[x].value
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#define VALUE(x) g_cells[x].cdr
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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 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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// Environment setup
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SCM
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mes_environment ()
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{
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return 0;
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}
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SCM
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mes_builtins (SCM a)
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{
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return a;
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}
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SCM
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fill ()
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{
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TYPE (0) = 0x6c6c6168;
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CAR (0) = 0x6a746f6f;
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CDR (0) = 0x00002165;
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TYPE (1) = SYMBOL;
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CAR (1) = 0x2d2d2d2d;
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CDR (1) = 0x3e3e3e3e;
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TYPE (9) = 0x2d2d2d2d;
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CAR (9) = 0x2d2d2d2d;
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CDR (9) = 0x3e3e3e3e;
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// (A(B))
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TYPE (10) = PAIR;
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CAR (10) = 11;
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CDR (10) = 12;
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TYPE (11) = CHAR;
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CAR (11) = 0x58585858;
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CDR (11) = 89;
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TYPE (12) = PAIR;
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CAR (12) = 13;
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CDR (12) = 1;
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TYPE (13) = CHAR;
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CAR (11) = 0x58585858;
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CDR (13) = 90;
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TYPE (14) = 0x58585858;
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CAR (14) = 0x58585858;
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CDR (14) = 0x58585858;
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TYPE (14) = 0x58585858;
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CAR (14) = 0x58585858;
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CDR (14) = 0x58585858;
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TYPE (16) = 0x3c3c3c3c;
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CAR (16) = 0x2d2d2d2d;
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CDR (16) = 0x2d2d2d2d;
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return 0;
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}
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SCM
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display_ (SCM x)
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{
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//puts ("<display>\n");
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switch (TYPE (x))
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{
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case CHAR:
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{
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//puts ("<char>\n");
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puts ("#\\");
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putchar (VALUE (x));
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break;
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}
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case TFUNCTION:
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{
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//puts ("<function>\n");
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if (VALUE (x) == 0)
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puts ("make-cell");
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if (VALUE (x) == 1)
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puts ("cons");
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if (VALUE (x) == 2)
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puts ("car");
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if (VALUE (x) == 3)
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puts ("cdr");
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break;
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}
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case NUMBER:
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{
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//puts ("<number>\n");
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#if __GNUC__
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puts (itoa (VALUE (x)));
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#else
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int i;
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i = VALUE (x);
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i = i + 48;
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putchar (i);
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#endif
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break;
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}
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case PAIR:
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{
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//puts ("<pair>\n");
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//if (cont != cell_f) puts "(");
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puts ("(");
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if (x && x != cell_nil) display_ (CAR (x));
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if (CDR (x) && CDR (x) != cell_nil)
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{
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#if __GNUC__
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if (TYPE (CDR (x)) != PAIR)
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puts (" . ");
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#else
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int c;
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c = CDR (x);
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c = TYPE (c);
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if (c != PAIR)
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puts (" . ");
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#endif
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display_ (CDR (x));
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}
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//if (cont != cell_f) puts (")");
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puts (")");
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break;
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}
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case SPECIAL:
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{
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switch (x)
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{
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case 1: {puts ("()"); break;}
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case 2: {puts ("#f"); break;}
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case 3: {puts ("#t"); break;}
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default:
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{
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#if __GNUC__
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puts ("<x:");
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puts (itoa (x));
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puts (">");
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#else
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puts ("<x>");
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#endif
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}
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}
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break;
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}
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case SYMBOL:
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{
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switch (x)
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{
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case 11: {puts (" . "); break;}
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case 12: {puts ("lambda"); break;}
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case 13: {puts ("begin"); break;}
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case 14: {puts ("if"); break;}
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case 15: {puts ("quote"); break;}
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case 37: {puts ("car"); break;}
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case 38: {puts ("cdr"); break;}
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case 39: {puts ("null?"); break;}
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case 40: {puts ("eq?"); break;}
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case 41: {puts ("cons"); break;}
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default:
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{
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#if __GNUC__
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puts ("<s:");
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puts (itoa (x));
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puts (">");
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#else
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puts ("<s>");
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#endif
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}
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}
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break;
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}
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default:
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{
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//puts ("<default>\n");
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#if __GNUC__
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puts ("<");
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puts (itoa (TYPE (x)));
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puts (":");
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puts (itoa (x));
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puts (">");
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#else
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puts ("_");
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#endif
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break;
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}
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}
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return 0;
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}
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SCM
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bload_env (SCM a) ///((internal))
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{
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puts ("reading: ");
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char *mo = "module/mes/hack-32.mo";
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puts (mo);
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puts ("\n");
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g_stdin = open (mo, 0);
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if (g_stdin < 0) {eputs ("no such file: module/mes/read-0-32.mo\n");return 1;}
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// BOOM
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//char *p = arena;
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char *p = (char*)g_cells;
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int c;
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c = getchar ();
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putchar (c);
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if (c != 'M') exit (10);
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c = getchar ();
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putchar (c);
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if (c != 'E') exit (11);
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c = getchar ();
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putchar (c);
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if (c != 'S') exit (12);
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puts (" *GOT MES*\n");
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// skip stack
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getchar ();
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getchar ();
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c = getchar ();
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while (c != -1)
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{
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*p++ = c;
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c = getchar ();
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}
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puts ("read done\n");
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display_ (10);
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puts ("\n");
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return r2;
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}
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int
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main (int argc, char *argv[])
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{
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fill ();
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char *p = arena;
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puts (p);
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puts ("\n");
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display_ (10);
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puts ("\n");
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SCM program = bload_env (r0);
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return 0;
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}
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#if __GNUC__
|
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void
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_start ()
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{
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int r;
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asm (
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"mov %%ebp,%%eax\n\t"
|
||
"addl $8,%%eax\n\t"
|
||
"push %%eax\n\t"
|
||
|
||
"mov %%ebp,%%eax\n\t"
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"addl $4,%%eax\n\t"
|
||
"movzbl (%%eax),%%eax\n\t"
|
||
"push %%eax\n\t"
|
||
|
||
"call main\n\t"
|
||
"movl %%eax,%0\n\t"
|
||
: "=r" (r)
|
||
: //no inputs "" (&main)
|
||
);
|
||
exit (r);
|
||
}
|
||
#endif
|
||
|