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import strconv
/**********************************************************************
*
* String to float Test
*
**********************************************************************/
fn test_atof() {
//
// test set
//
// float64
src_num := [
f64(0.3),
-0.3,
0.004,
-0.004,
0.0,
-0.0,
31234567890123,
]
// strings
src_num_str := [
'0.3',
'-0.3',
'0.004',
'-0.004',
'0.0',
'-0.0',
'31234567890123',
]
// check conversion case 1 string <=> string
for c, x in src_num {
// slow atof
assert strconv.atof64(src_num_str[c]).strlong() == x.strlong()
// quick atof
mut s1 := (strconv.atof_quick(src_num_str[c]).str())
mut s2 := (x.str())
delta := s1.f64() - s2.f64()
// println("$s1 $s2 $delta")
assert delta < f64(1e-16)
// test C.atof
n1 := x.strsci(18)
n2 := f64(C.atof(&char(src_num_str[c].str))).strsci(18)
// println("$n1 $n2")
assert n1 == n2
}
// check conversion case 2 string <==> f64
// we don't test atof_quick beacuse we already know the rounding error
for c, x in src_num_str {
b := src_num[c].strlong()
a1 := strconv.atof64(x).strlong()
assert a1 == b
}
// special cases
mut f1 := f64(0.0)
mut ptr := unsafe { &u64(&f1) }
ptr = unsafe { &u64(&f1) }
// double_plus_zero
f1 = 0.0
assert *ptr == u64(0x0000000000000000)
// double_minus_zero
f1 = -0.0
assert *ptr == u64(0x8000000000000000)
println('DONE!')
}
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