58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
/* This file is part of stage0.
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*
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* stage0 is free software: you can redistribute it and/or modify
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* it 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
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* (at your option) any later version.
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*
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* stage0 is distributed in the hope that it will be useful,
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* but 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 stage0. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <ctype.h>
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enum otype
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{
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FREE = 1,
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MARKED = (1 << 1),
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INT = (1 << 2),
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SYM = (1 << 3),
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CONS = (1 << 4),
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PROC = (1 << 5),
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PRIMOP = (1 << 6),
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ASCII = (1 << 7)
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};
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typedef struct cell* (*Operation)(struct cell *);
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typedef struct cell
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{
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enum otype type;
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union
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{
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struct cell* car;
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int value;
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char* string;
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Operation function;
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};
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struct cell* cdr;
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struct cell* env;
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} cell;
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#define MAXLEN 256
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struct cell* make_cons(struct cell* a, struct cell* b);
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/* Global objects */
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struct cell *all_symbols, *top_env, *nil, *tee, *quote, *s_if, *s_lambda, *s_define, *s_setb, *s_cond, *s_begin;
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