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/*
* Copyright (C) 2018 Tomasz Kramkowski <tk@the-tk.com>
* SPDX-License-Identifier: MIT
*/
#include <math.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include "ieee754.h"
// naiive: return the binary representation of a float (non portable)
static unsigned long naiive(float n)
{
union {
float f;
uint32_t u;
} u = { .f = n };
return u.u;
}
// test: test ieee754f against a certain number
void test(float a)
{
float b = ieee754f(naiive(a));
if (!((isnan(a) && isnan(b)) || a == b)) {
fprintf(stderr, "%lu: %.40f != %.40f\n", naiive(a), a, b);
exit(EXIT_FAILURE);
}
}
int main(void)
{
test(NAN);
test(+INFINITY);
test(-INFINITY);
test(0x1p127f);
test(0x7fffffp-149f);
for (float n = -0.000000001; n <= 1; n = nextafterf(n, 2))
test(n);
}
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