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https://github.com/vlang/v.git
synced 2023-08-10 21:13:21 +03:00
54 lines
1.7 KiB
V
54 lines
1.7 KiB
V
module main
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fn test_issue_16448() {
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float_prec := 1.9999999999999999 + 0.0000000000000000005
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assert float_prec > 1.99
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assert float_prec < 2.01
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}
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fn test_atof_converter() {
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mut float_prec := 1.9999999999999999 + 0.0000000000000000005
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assert float_prec == 2.0
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float_prec = 3.9999999999999999 + 0.0000000000000000005
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assert float_prec == 4.0
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float_prec = -3.9999999999999999 - 0.0000000000000000005
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assert float_prec == -4.0
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float_prec = -1.9999999999999999 - 0.0000000000000000005
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assert float_prec == -2.0
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float_prec = 0.025 + 0.0000000000000000005
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assert float_prec == 0.025
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float_prec = 0.0625 + 0.0000000000000000005
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assert float_prec == 0.0625
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float_prec = 0.0009765625 + 0.0000000000000000005
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assert float_prec > 0.00097656250 && float_prec < 0.00097656251
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float_prec = -0.025 - 0.0000000000000000005
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assert float_prec == -0.025
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float_prec = -0.0625 - 0.0000000000000000005
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assert float_prec == -0.0625
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float_prec = -0.0009765625 - 0.0000000000000000005
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assert float_prec < -0.00097656250 && float_prec > -0.00097656251
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}
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// Testing all the numbers between -100E6..100E6 takes over a minute with clang on i3
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// while for just -1E5..1E5, it takes less than a second.
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// const r = i64(100_000_001)
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// const r = i64(17_000_001)
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const r = i64(100_001)
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fn test_renormalisation_inside_converter() {
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for i in -r .. r {
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s := '${i}.9999999999999999999'
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fs := s.f64()
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ifs := i64(fs)
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if i % 10000 == 0 {
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eprintln('>>> s: ${s:30s} | fs: ${fs:20.6f} | ifs: ${ifs:20}')
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}
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if i < 0 && ifs != i - 1 {
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panic('invalid negative f64 value, i: ${i} | s: ${s} | fs: ${fs} | ifs: ${ifs}')
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}
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if i > 0 && ifs != i + 1 {
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panic('invalid positive f64 value, i: ${i} | s: ${s} | fs: ${fs} | ifs: ${ifs}')
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}
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}
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}
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