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72 lines
989 B
C
72 lines
989 B
C
#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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extern int32_t sp;
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extern int32_t stack;
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void emit()
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{
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putchar(*(&stack + --sp));
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}
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void print()
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{
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printf("%d\n", *(&stack + --sp));
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}
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void sub()
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{
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int32_t *st = &stack;
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st[sp - 2] -= st[sp - 1];
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--sp;
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}
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void cswap()
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{
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int32_t *st = &stack;
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--sp;
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if (st[sp]) {
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int32_t tmp = st[sp - 1];
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st[sp - 1] = st[sp - 2];
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st[sp - 2] = tmp;
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}
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}
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void eq()
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{
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int32_t *st = &stack;
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--sp;
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st[sp - 1] = st[sp - 1] == st[sp];
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}
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void cons()
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{
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int32_t *st = &stack;
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int32_t *pair = malloc(2 * sizeof(int32_t));
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--sp;
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pair[0] = st[sp];
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pair[1] = st[sp - 1];
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st[sp - 1] = (int32_t)pair;
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}
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void car()
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{
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int32_t *st = &stack;
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st[sp - 1] = ((int32_t *)st[sp - 1])[0];
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}
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void cdr()
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{
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int32_t *st = &stack;
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st[sp - 1] = ((int32_t *)st[sp - 1])[1];
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}
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void decons()
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{
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int32_t *st = &stack;
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--sp;
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free((int32_t *)st[sp]);
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}
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