85 lines
1.0 KiB
C++
85 lines
1.0 KiB
C++
#include "stdafx.h"
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#include "defs.h"
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void
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eval_float(void)
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{
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push(cadr(p1));
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eval();
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yyfloat();
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eval(); // normalize
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}
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void
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yyfloat(void)
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{
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int i, h;
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save();
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p1 = pop();
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if (iscons(p1)) {
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h = tos;
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while (iscons(p1)) {
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push(car(p1));
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yyfloat();
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p1 = cdr(p1);
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}
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list(tos - h);
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} else if (p1->k == TENSOR) {
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push(p1);
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copy_tensor();
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p1 = pop();
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for (i = 0; i < p1->u.tensor->nelem; i++) {
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push(p1->u.tensor->elem[i]);
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yyfloat();
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p1->u.tensor->elem[i] = pop();
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}
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push(p1);
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} else if (p1->k == NUM) {
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push(p1);
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bignum_float();
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} else if (p1 == symbol(PI))
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push_double(M_PI);
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else if (p1 == symbol(E))
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push_double(M_E);
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else
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push(p1);
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restore();
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}
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#if SELFTEST
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static char *s[] = {
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"float(x)",
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"x",
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"float(1/2)",
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"0.5",
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"float(pi)",
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"3.14159",
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"float(exp(1))",
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"2.71828",
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"x=(1/2,1/4)",
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"",
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"float(x)",
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"(0.5,0.25)",
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"x",
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"(1/2,1/4)",
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"x=quote(x)",
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"",
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};
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void
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test_float(void)
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{
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test(__FILE__, s, sizeof s / sizeof (char *));
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}
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#endif
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