461 lines
9.8 KiB
C
461 lines
9.8 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2016,2017,2018,2019,2020,2021 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU 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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* GNU 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "mes/lib.h"
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#include "mes/mes.h"
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#include <fcntl.h>
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#include <limits.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <time.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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struct scm *
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abort_ () /*:((name . "abort")) */
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{
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if (g_debug > 0)
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eputs ("abort!\n");
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if (__raise (SIGABRT) < 0) /* could not raise SIGABRT */
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{
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/* Fail in any way possible */
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char* x = 0;
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x[0] = 2;
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}
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return cell_unspecified;
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}
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struct scm *
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exit_ (struct scm *x) /*:((name . "exit")) */
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{
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assert_msg (x->type == TNUMBER, "x->type == TNUMBER");
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exit (x->value);
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}
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int
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peekchar ()
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{
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if (__stdin >= 0)
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{
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int c = readchar ();
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unreadchar (c);
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return c;
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}
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struct scm *port = current_input_port ();
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struct scm *string = port->string;
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size_t length = string->length;
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if (length == 0)
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return -1;
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char const *p = cell_bytes (string->string);
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return p[0];
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}
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int
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readchar ()
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{
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if (__stdin >= 0)
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return fdgetc (__stdin);
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struct scm *port = current_input_port ();
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struct scm *string = port->string;
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size_t length = string->length;
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if (length == 0)
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return -1;
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char const *p = cell_bytes (string->string);
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int c = p[0];
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p = p + 1;
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port->string = make_string (p, length - 1);
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return c;
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}
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int
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unreadchar (int c)
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{
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if (__stdin >= 0)
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return fdungetc (c, __stdin);
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if (c == EOF) /* can't unread EOF */
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return c;
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struct scm *port = current_input_port ();
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struct scm *string = port->string;
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size_t length = string->length;
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char *p = cell_bytes (string->string);
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p = p - 1;
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string = make_string (p, length + 1);
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p = cell_bytes (string->string);
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p[0] = c;
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port->string = string;
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return c;
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}
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struct scm *
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peek_byte ()
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{
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return make_number (peekchar ());
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}
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struct scm *
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read_byte ()
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{
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return make_number (readchar ());
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}
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struct scm *
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unread_byte (struct scm *i)
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{
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unreadchar (i->value);
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return i;
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}
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struct scm *
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peek_char ()
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{
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return make_char (peekchar ());
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}
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struct scm *
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read_char (struct scm *port) /*:((arity . n)) */
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{
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int fd = __stdin;
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if (port->type == TPAIR)
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if (port->car->type == TNUMBER)
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__stdin = port->car->value;
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struct scm *c = make_char (readchar ());
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__stdin = fd;
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return c;
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}
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struct scm *
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unread_char (struct scm *i)
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{
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unreadchar (i->value);
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return i;
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}
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struct scm *
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write_char (struct scm *i) /*:((arity . n)) */
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{
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write_byte (i);
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return i;
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}
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struct scm *
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write_byte (struct scm *x) /*:((arity . n)) */
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{
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struct scm *c = car (x);
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struct scm *p = cdr (x);
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int fd = __stdout;
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if (p->type == TPAIR)
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{
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struct scm *f = p->car;
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if (f->type == TNUMBER)
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{
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long v = f->value;
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if (v != 1)
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fd = v;
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if (v == 2)
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fd = __stderr;
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}
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}
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char cc = c->value;
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write (fd, &cc, 1);
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#if !__MESC__
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assert_msg (c->type == TNUMBER || c->type == TCHAR, "c->type == TNUMBER || c->type == TCHAR");
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#endif
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return c;
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}
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struct scm *
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getenv_ (struct scm *s) /*:((name . "getenv")) */
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{
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char *p;
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p = getenv (cell_bytes (s->string));
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if (p != 0)
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return make_string0 (p);
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return cell_f;
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}
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struct scm *
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setenv_ (struct scm *s, struct scm *v) /*:((name . "setenv")) */
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{
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char *buf = __setenv_buf;
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strcpy (buf, cell_bytes (s->string));
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setenv (buf, cell_bytes (v->string), 1);
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return cell_unspecified;
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}
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struct scm *
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access_p (struct scm *file_name, struct scm *mode)
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{
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int result = access (cell_bytes (file_name->string), mode->value);
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if (result == 0)
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return cell_t;
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return cell_f;
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}
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struct scm *
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current_input_port ()
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{
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if (__stdin >= 0)
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return make_number (__stdin);
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struct scm *x = g_ports;
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struct scm *a;
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while (x != 0)
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{
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a = x->car;
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if (a->port == __stdin)
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return a;
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x = x->cdr;
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}
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return x->car;
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}
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struct scm *
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open_input_file (struct scm *file_name)
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{
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int filedes = mes_open (cell_bytes (file_name->string), O_RDONLY, 0);
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if (filedes == -1)
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error (cell_symbol_system_error, cons (make_string0 ("No such file or directory"), file_name));
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return make_number (filedes);
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}
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struct scm *
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open_input_string (struct scm *string)
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{
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struct scm *port = make_string_port (string);
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g_ports = cons (port, g_ports);
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return port;
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}
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struct scm *
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set_current_input_port (struct scm *port)
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{
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struct scm *prev = current_input_port ();
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if (port->type == TNUMBER)
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{
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int p = port->value;
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if (p != 0)
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__stdin = p;
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else
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__stdin = STDIN;
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}
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else if (port->type == TPORT)
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__stdin = port->port;
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return prev;
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}
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struct scm *
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current_output_port ()
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{
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return make_number (__stdout);
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}
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struct scm *
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current_error_port ()
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{
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return make_number (__stderr);
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}
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struct scm *
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open_output_file (struct scm *x) /*:((arity . n)) */
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{
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struct scm *file_name = car (x);
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x = cdr (x);
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int mode = S_IRUSR | S_IWUSR;
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if (x->type == TPAIR)
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{
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struct scm *i = car (x);
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if (i->type == TNUMBER)
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mode = i->value;
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}
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return make_number (mes_open (cell_bytes (file_name->string), O_WRONLY | O_CREAT | O_TRUNC, mode));
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}
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struct scm *
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set_current_output_port (struct scm *port)
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{
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if (port->value != 0)
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__stdout = port->value;
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else
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__stdout = STDOUT;
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return current_output_port ();
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}
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struct scm *
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set_current_error_port (struct scm *port)
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{
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if (port->value != 0)
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__stderr = port->value;
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else
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__stderr = STDERR;
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return current_error_port ();
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}
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struct scm *
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chmod_ (struct scm *file_name, struct scm *mode) /*:((name . "chmod")) */
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{
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chmod (cell_bytes (file_name->string), mode->value);
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return cell_unspecified;
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}
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struct scm *
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isatty_p (struct scm *port)
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{
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if (isatty (port->value) != 0)
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return cell_t;
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return cell_f;
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}
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struct scm *
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primitive_fork ()
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{
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return make_number (fork ());
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}
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struct scm *
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execl_ (struct scm *file_name, struct scm *args) /*:((name . "execl")) */
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{
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char **c_argv = __execl_c_argv;
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int i = 0;
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if (length__ (args) > 1000)
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error (cell_symbol_system_error,
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cons (file_name, cons (make_string0 ("too many arguments"), cons (file_name, args))));
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c_argv[i] = cell_bytes (file_name->string);
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i = i + 1;
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struct scm *arg;
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while (args != cell_nil)
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{
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assert_msg (args->car->type == TSTRING, "args->car->type == TSTRING");
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arg = args->car;
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c_argv[i] = cell_bytes (arg->string);
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i = i + 1;
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args = args->cdr;
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if (g_debug > 2)
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{
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eputs ("arg[");
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eputs (itoa (i));
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eputs ("]: ");
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eputs (c_argv[i - 1]);
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eputs ("\n");
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}
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}
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c_argv[i] = 0;
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return make_number (execv (c_argv[0], c_argv));
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}
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struct scm *
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waitpid_ (struct scm *pid, struct scm *options)
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{
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int status;
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int child = waitpid (pid->value, &status, options->value);
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return cons (make_number (child), make_number (status));
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}
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#if __M2__
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/* Milliseconds for everyone else. */
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#define TIME_UNITS_PER_SECOND 1000
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#elif __x86_64__
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/* Nanoseconds on 64-bit systems with POSIX timers. */
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#define TIME_UNITS_PER_SECOND 1000000000U
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#else
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/* Milliseconds for everyone else. */
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#define TIME_UNITS_PER_SECOND 1000U
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#endif
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struct scm *
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init_time (struct scm *a) /*:((internal)) */
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{
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clock_gettime (CLOCK_PROCESS_CPUTIME_ID, g_start_time);
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a = acons (cell_symbol_internal_time_units_per_second, make_number (TIME_UNITS_PER_SECOND), a);
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}
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struct scm *
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current_time ()
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{
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return make_number (time (0));
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}
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struct scm *
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gettimeofday_ () /*:((name . "gettimeofday")) */
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{
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struct timeval *time = __gettimeofday_time;
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gettimeofday (time, 0);
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return cons (make_number (time->tv_sec), make_number (time->tv_usec));
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}
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#if __M2__
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#define UL1000000000 1000000000
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#else
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#define UL1000000000 1000000000UL
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#endif
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long
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seconds_and_nanoseconds_to_long (long s, long ns)
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{
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size_t uns = ns;
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if (ns < 0)
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{
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uns = - ns;
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return s * TIME_UNITS_PER_SECOND - uns / (UL1000000000 / TIME_UNITS_PER_SECOND);
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}
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return s * TIME_UNITS_PER_SECOND + uns / (UL1000000000 / TIME_UNITS_PER_SECOND);
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}
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struct scm *
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get_internal_run_time ()
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{
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struct timespec *ts = __get_internal_run_time_ts;
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clock_gettime (CLOCK_PROCESS_CPUTIME_ID, ts);
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long time = seconds_and_nanoseconds_to_long (ts->tv_sec - g_start_time->tv_sec,
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ts->tv_nsec - g_start_time->tv_nsec);
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return make_number (time);
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}
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struct scm *
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getcwd_ () /*:((name . "getcwd")) */
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{
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return make_string0 (getcwd (0, PATH_MAX));
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}
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struct scm *
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dup_ (struct scm *port) /*:((name . "dup")) */
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{
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return make_number (dup (port->value));
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}
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struct scm *
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dup2_ (struct scm *old, struct scm *new) /*:((name . "dup2")) */
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{
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dup2 (old->value, new->value);
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return cell_unspecified;
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}
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struct scm *
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delete_file (struct scm *file_name)
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{
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unlink (cell_bytes (file_name->string));
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return cell_unspecified;
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}
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