93 lines
1.8 KiB
V
93 lines
1.8 KiB
V
import strconv
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/**********************************************************************
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*
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* String to float Test
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*
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**********************************************************************/
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fn test_atof() {
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//
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// test set
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//
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// float64
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src_num := [
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f64(0.3),
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-0.3,
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0.004,
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-0.004,
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0.0,
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-0.0,
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31234567890123,
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]
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// strings
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src_num_str := [
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'0.3',
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'-0.3',
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'0.004',
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'-0.004',
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'0.0',
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'-0.0',
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'31234567890123',
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]
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// check conversion case 1 string <=> string
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for c, x in src_num {
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// slow atof
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val := strconv.atof64(src_num_str[c]) or { panic(err) }
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assert val.strlong() == x.strlong()
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// quick atof
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mut s1 := (strconv.atof_quick(src_num_str[c]).str())
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mut s2 := (x.str())
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delta := s1.f64() - s2.f64()
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// println("$s1 $s2 $delta")
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assert delta < f64(1e-16)
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// test C.atof
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n1 := x.strsci(18)
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n2 := f64(C.atof(&char(src_num_str[c].str))).strsci(18)
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// println("$n1 $n2")
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assert n1 == n2
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}
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// check conversion case 2 string <==> f64
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// we don't test atof_quick beacuse we already know the rounding error
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for c, x in src_num_str {
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b := src_num[c].strlong()
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value := strconv.atof64(x) or { panic(err) }
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a1 := value.strlong()
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assert a1 == b
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}
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// special cases
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mut f1 := f64(0.0)
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mut ptr := unsafe { &u64(&f1) }
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ptr = unsafe { &u64(&f1) }
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// double_plus_zero
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f1 = 0.0
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assert *ptr == u64(0x0000000000000000)
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// double_minus_zero
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f1 = -0.0
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assert *ptr == u64(0x8000000000000000)
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println('DONE!')
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}
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fn test_atof_errors() {
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if x := strconv.atof64('') {
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eprintln('> x: $x')
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assert false // strconv.atof64 should have failed
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} else {
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assert err.str() == 'expected a number found an empty string'
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}
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if x := strconv.atof64('####') {
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eprintln('> x: $x')
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assert false // strconv.atof64 should have failed
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} else {
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assert err.str() == 'not a number'
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}
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}
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