39 lines
615 B
C
39 lines
615 B
C
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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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INT = 1,
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SYM = (1 << 1),
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CONS = (1 << 2),
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PROC = (1 << 3),
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PRIMOP = (1 << 4),
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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;
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