16f678a158
* mes.c (scm_t): Add string field. (make_string, internal_lookup_symbol, internal_make_symbol, make_symbol, lookup, readword): Take scm*. Update callers. (display_helper): Support string field. (append_char): New function. (readstring): Use it. Produce scm*. (cstring_to_list): New function. (add_environment, internal_make_symbol): Use it. (list_of_char_equal_p): New function. (internal_lookup_symbol): Use it. * lib.c (list_ref): New function. * string.c (string_ref): Use it. (string, string_append, string_length, substring, number_to_string, string_to_symbol, symbol_to_string): Update to list-of-characters implementation.
101 lines
2.3 KiB
C
101 lines
2.3 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 *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 *caaar (scm *x) {return car (car (car (x)));}
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scm *caadr (scm *x) {return car (car (cdr (x)));}
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scm *caddr (scm *x) {return car (cdr (cdr (x)));}
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scm *cdadr (scm *x) {return cdr (car (cdr (x)));}
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scm *cadar (scm *x) {return car (cdr (car (x)));}
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scm *cddar (scm *x) {return cdr (cdr (car (x)));}
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scm *cdddr (scm *x) {return cdr (cdr (cdr (x)));}
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scm *
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length (scm *x)
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{
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int n = 0;
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while (x != &scm_nil)
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{
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n++;
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x = cdr (x);
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}
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return make_number (n);
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}
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scm *
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last_pair (scm *x)
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{
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while (x != &scm_nil && cdr (x) != &scm_nil)
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x = cdr (x);
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return x;
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}
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scm *
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list (scm *x) ///((args . n))
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{
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return x;
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}
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scm *
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list_ref (scm *x, scm *k)
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{
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assert (x->type == PAIR);
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assert (k->type == NUMBER);
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int n = k->value;
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while (n-- && x->cdr != &scm_nil) x = x->cdr;
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return x != &scm_nil ? x->car : &scm_undefined;
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}
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scm *
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vector_to_list (scm *v)
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{
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scm *x = &scm_nil;
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for (int i = 0; i < v->length; i++) {
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scm *e = &v->vector[i];
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if (e->type == REF) e = e->ref;
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x = append2 (x, cons (e, &scm_nil));
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}
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return x;
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}
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scm *
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integer_to_char (scm *x)
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{
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assert (x->type == NUMBER);
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return make_char (x->value);
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}
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scm *
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char_to_integer (scm *x)
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{
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assert (x->type == CHAR);
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return make_number (x->value);
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}
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scm *
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builtin_exit (scm *x)
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{
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assert (x->type == NUMBER);
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exit (x->value);
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}
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