98f64ae516
* module/language/c99/compiler.mes (expr->accu): Add mul. (test->jump->info): Add le, ge. (ast->info): Support int and char* initialization at top level. * module/mes/as-i386.mes (i386:accu*base, i386:Xjump-cz, i386:Xjump-ncz): New function. * module/mes/as-i386.scm: Export them. * doc/examples/t.c (test): Test them. * module/mes/libc.mes (ungetc): New function. (getchar): Support it. (assert_fail, isdigit): New functions. (libc): Export them. * module/mes/mini-0.mes: Load full reader. * mlibc.c (ungetc): New function. (getchar): Support it. (assert_fail, isdigit): New functions. * mes.c (list length error lookup_ getchar ungetchar peekchar peek_byte read_byte unread_byte greater_p less_p): Move functions needed to run read-0.mes into core. * doc/examples/mini-mes.c: Likewise. * lib.c (length, error): Comment-out. * math.c (greater_p, less_p): Comment-out. * posix.c: (getchar, ungetchar, peekchar, peek_byte, read_byte, unread_byte): Comment-out. * reader.c (lookup_): Comment-out.
112 lines
3.1 KiB
C
112 lines
3.1 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* Mes --- Maxwell Equations of Software
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* Copyright © 2016 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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SCM
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read_input_file_env_ (SCM e, SCM a)
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{
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if (e == cell_nil) return e;
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return cons (e, read_input_file_env_ (read_env (a), a));
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}
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SCM
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read_input_file_env (SCM a)
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{
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r0 = a;
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if (assq_ref_env (cell_symbol_read_input_file, r0) != cell_undefined)
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return apply (cell_symbol_read_input_file, cell_nil, r0);
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return read_input_file_env_ (read_env (r0), r0);
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}
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int
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read_line_comment (int c)
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{
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if (c == '\n') return c;
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return read_line_comment (getchar ());
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}
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SCM
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read_word (int c, SCM w, SCM a)
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{
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if (c == EOF && w == cell_nil) return cell_nil;
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if (c == '\t') return read_word ('\n', w, a);
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if (c == '\f') return read_word ('\n', w, a);
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if (c == '\n' && w == cell_nil) return read_word (getchar (), w, a);
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if (c == '\n' && VALUE (car (w)) == '.' && cdr (w) == cell_nil) return cell_dot;
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if (c == EOF || c == '\n') return lookup_ (w, a);
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if (c == ' ') return read_word ('\n', w, a);
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if (c == '(' && w == cell_nil) return read_list (a);
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if (c == '(') {ungetchar (c); return lookup_ (w, a);}
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if (c == ')' && w == cell_nil) {ungetchar (c); return cell_nil;}
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if (c == ')') {ungetchar (c); return lookup_ (w, a);}
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if (c == ';') {read_line_comment (c); return read_word ('\n', w, a);}
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return read_word (getchar (), append2 (w, cons (MAKE_CHAR (c), cell_nil)), a);
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}
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int
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eat_whitespace (int c)
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{
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while (c == ' ' || c == '\t' || c == '\n' || c == '\f') c = getchar ();
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if (c == ';') return eat_whitespace (read_line_comment (c));
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return c;
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}
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SCM
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read_list (SCM a)
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{
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int c = getchar ();
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c = eat_whitespace (c);
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if (c == ')') return cell_nil;
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SCM w = read_word (c, cell_nil, a);
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if (w == cell_dot)
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return car (read_list (a));
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return cons (w, read_list (a));
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}
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SCM
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read_env (SCM a)
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{
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return read_word (getchar (), cell_nil, a);
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}
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//MINI_MES
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// SCM
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// lookup_ (SCM s, SCM a)
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// {
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// if (isdigit (VALUE (car (s))) || (VALUE (car (s)) == '-' && cdr (s) != cell_nil)) {
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// SCM p = s;
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// int sign = 1;
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// if (VALUE (car (s)) == '-') {
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// sign = -1;
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// p = cdr (s);
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// }
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// int n = 0;
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// while (p != cell_nil && isdigit (VALUE (car (p)))) {
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// n *= 10;
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// n += VALUE (car (p)) - '0';
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// p = cdr (p);
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// }
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// if (p == cell_nil) return MAKE_NUMBER (n * sign);
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// }
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// SCM x = lookup_symbol_ (s);
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// return x ? x : make_symbol_ (s);
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// }
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