| #![cfg(not(miri))] // Miri does not implement ldexp, which most tests here need |
| |
| use std::prelude::v1::*; |
| use std::{str, i16, f32, f64, fmt}; |
| |
| use core::num::flt2dec::{decode, DecodableFloat, FullDecoded, Decoded}; |
| use core::num::flt2dec::{MAX_SIG_DIGITS, round_up, Part, Formatted, Sign}; |
| use core::num::flt2dec::{to_shortest_str, to_shortest_exp_str, |
| to_exact_exp_str, to_exact_fixed_str}; |
| |
| pub use test::Bencher; |
| |
| mod estimator; |
| mod strategy { |
| mod dragon; |
| mod grisu; |
| } |
| mod random; |
| |
| pub fn decode_finite<T: DecodableFloat>(v: T) -> Decoded { |
| match decode(v).1 { |
| FullDecoded::Finite(decoded) => decoded, |
| full_decoded => panic!("expected finite, got {:?} instead", full_decoded) |
| } |
| } |
| |
| macro_rules! check_shortest { |
| ($f:ident($v:expr) => $buf:expr, $exp:expr) => ( |
| check_shortest!($f($v) => $buf, $exp; |
| "shortest mismatch for v={v}: actual {actual:?}, expected {expected:?}", |
| v = stringify!($v)) |
| ); |
| |
| ($f:ident{$($k:ident: $v:expr),+} => $buf:expr, $exp:expr) => ( |
| check_shortest!($f{$($k: $v),+} => $buf, $exp; |
| "shortest mismatch for {v:?}: actual {actual:?}, expected {expected:?}", |
| v = Decoded { $($k: $v),+ }) |
| ); |
| |
| ($f:ident($v:expr) => $buf:expr, $exp:expr; $fmt:expr, $($key:ident = $val:expr),*) => ({ |
| let mut buf = [b'_'; MAX_SIG_DIGITS]; |
| let (len, k) = $f(&decode_finite($v), &mut buf); |
| assert!((&buf[..len], k) == ($buf, $exp), |
| $fmt, actual = (str::from_utf8(&buf[..len]).unwrap(), k), |
| expected = (str::from_utf8($buf).unwrap(), $exp), |
| $($key = $val),*); |
| }); |
| |
| ($f:ident{$($k:ident: $v:expr),+} => $buf:expr, $exp:expr; |
| $fmt:expr, $($key:ident = $val:expr),*) => ({ |
| let mut buf = [b'_'; MAX_SIG_DIGITS]; |
| let (len, k) = $f(&Decoded { $($k: $v),+ }, &mut buf); |
| assert!((&buf[..len], k) == ($buf, $exp), |
| $fmt, actual = (str::from_utf8(&buf[..len]).unwrap(), k), |
| expected = (str::from_utf8($buf).unwrap(), $exp), |
| $($key = $val),*); |
| }) |
| } |
| |
| macro_rules! try_exact { |
| ($f:ident($decoded:expr) => $buf:expr, $expected:expr, $expectedk:expr; |
| $fmt:expr, $($key:ident = $val:expr),*) => ({ |
| let (len, k) = $f($decoded, &mut $buf[..$expected.len()], i16::MIN); |
| assert!((&$buf[..len], k) == ($expected, $expectedk), |
| $fmt, actual = (str::from_utf8(&$buf[..len]).unwrap(), k), |
| expected = (str::from_utf8($expected).unwrap(), $expectedk), |
| $($key = $val),*); |
| }) |
| } |
| |
| macro_rules! try_fixed { |
| ($f:ident($decoded:expr) => $buf:expr, $request:expr, $expected:expr, $expectedk:expr; |
| $fmt:expr, $($key:ident = $val:expr),*) => ({ |
| let (len, k) = $f($decoded, &mut $buf[..], $request); |
| assert!((&$buf[..len], k) == ($expected, $expectedk), |
| $fmt, actual = (str::from_utf8(&$buf[..len]).unwrap(), k), |
| expected = (str::from_utf8($expected).unwrap(), $expectedk), |
| $($key = $val),*); |
| }) |
| } |
| |
| fn ldexp_f32(a: f32, b: i32) -> f32 { |
| ldexp_f64(a as f64, b) as f32 |
| } |
| |
| fn ldexp_f64(a: f64, b: i32) -> f64 { |
| extern { |
| fn ldexp(x: f64, n: i32) -> f64; |
| } |
| unsafe { ldexp(a, b) } |
| } |
| |
| fn check_exact<F, T>(mut f: F, v: T, vstr: &str, expected: &[u8], expectedk: i16) |
| where T: DecodableFloat, F: FnMut(&Decoded, &mut [u8], i16) -> (usize, i16) { |
| // use a large enough buffer |
| let mut buf = [b'_'; 1024]; |
| let mut expected_ = [b'_'; 1024]; |
| |
| let decoded = decode_finite(v); |
| let cut = expected.iter().position(|&c| c == b' '); |
| |
| // check significant digits |
| for i in 1..cut.unwrap_or(expected.len() - 1) { |
| expected_[..i].copy_from_slice(&expected[..i]); |
| let mut expectedk_ = expectedk; |
| if expected[i] >= b'5' { |
| // check if this is a rounding-to-even case. |
| // we avoid rounding ...x5000... (with infinite zeroes) to ...(x+1) when x is even. |
| if !(i+1 < expected.len() && expected[i-1] & 1 == 0 && |
| expected[i] == b'5' && |
| expected[i+1] == b' ') { |
| // if this returns true, expected_[..i] is all `9`s and being rounded up. |
| // we should always return `100..00` (`i` digits) instead, since that's |
| // what we can came up with `i` digits anyway. `round_up` assumes that |
| // the adjustment to the length is done by caller, which we simply ignore. |
| if let Some(_) = round_up(&mut expected_, i) { expectedk_ += 1; } |
| } |
| } |
| |
| try_exact!(f(&decoded) => &mut buf, &expected_[..i], expectedk_; |
| "exact sigdigit mismatch for v={v}, i={i}: \ |
| actual {actual:?}, expected {expected:?}", |
| v = vstr, i = i); |
| try_fixed!(f(&decoded) => &mut buf, expectedk_ - i as i16, &expected_[..i], expectedk_; |
| "fixed sigdigit mismatch for v={v}, i={i}: \ |
| actual {actual:?}, expected {expected:?}", |
| v = vstr, i = i); |
| } |
| |
| // check exact rounding for zero- and negative-width cases |
| let start; |
| if expected[0] >= b'5' { |
| try_fixed!(f(&decoded) => &mut buf, expectedk, b"1", expectedk + 1; |
| "zero-width rounding-up mismatch for v={v}: \ |
| actual {actual:?}, expected {expected:?}", |
| v = vstr); |
| start = 1; |
| } else { |
| start = 0; |
| } |
| for i in start..-10 { |
| try_fixed!(f(&decoded) => &mut buf, expectedk - i, b"", expectedk; |
| "rounding-down mismatch for v={v}, i={i}: \ |
| actual {actual:?}, expected {expected:?}", |
| v = vstr, i = -i); |
| } |
| |
| // check infinite zero digits |
| if let Some(cut) = cut { |
| for i in cut..expected.len()-1 { |
| expected_[..cut].copy_from_slice(&expected[..cut]); |
| for c in &mut expected_[cut..i] { *c = b'0'; } |
| |
| try_exact!(f(&decoded) => &mut buf, &expected_[..i], expectedk; |
| "exact infzero mismatch for v={v}, i={i}: \ |
| actual {actual:?}, expected {expected:?}", |
| v = vstr, i = i); |
| try_fixed!(f(&decoded) => &mut buf, expectedk - i as i16, &expected_[..i], expectedk; |
| "fixed infzero mismatch for v={v}, i={i}: \ |
| actual {actual:?}, expected {expected:?}", |
| v = vstr, i = i); |
| } |
| } |
| } |
| |
| trait TestableFloat : DecodableFloat + fmt::Display { |
| /// Returns `x * 2^exp`. Almost same to `std::{f32,f64}::ldexp`. |
| /// This is used for testing. |
| fn ldexpi(f: i64, exp: isize) -> Self; |
| } |
| |
| impl TestableFloat for f32 { |
| fn ldexpi(f: i64, exp: isize) -> Self { f as Self * (exp as Self).exp2() } |
| } |
| |
| impl TestableFloat for f64 { |
| fn ldexpi(f: i64, exp: isize) -> Self { f as Self * (exp as Self).exp2() } |
| } |
| |
| fn check_exact_one<F, T>(mut f: F, x: i64, e: isize, tstr: &str, expected: &[u8], expectedk: i16) |
| where T: TestableFloat, |
| F: FnMut(&Decoded, &mut [u8], i16) -> (usize, i16) { |
| // use a large enough buffer |
| let mut buf = [b'_'; 1024]; |
| let v: T = TestableFloat::ldexpi(x, e); |
| let decoded = decode_finite(v); |
| |
| try_exact!(f(&decoded) => &mut buf, &expected, expectedk; |
| "exact mismatch for v={x}p{e}{t}: actual {actual:?}, expected {expected:?}", |
| x = x, e = e, t = tstr); |
| try_fixed!(f(&decoded) => &mut buf, expectedk - expected.len() as i16, &expected, expectedk; |
| "fixed mismatch for v={x}p{e}{t}: actual {actual:?}, expected {expected:?}", |
| x = x, e = e, t = tstr); |
| } |
| |
| macro_rules! check_exact { |
| ($f:ident($v:expr) => $buf:expr, $exp:expr) => ( |
| check_exact(|d,b,k| $f(d,b,k), $v, stringify!($v), $buf, $exp) |
| ) |
| } |
| |
| macro_rules! check_exact_one { |
| ($f:ident($x:expr, $e:expr; $t:ty) => $buf:expr, $exp:expr) => ( |
| check_exact_one::<_, $t>(|d,b,k| $f(d,b,k), $x, $e, stringify!($t), $buf, $exp) |
| ) |
| } |
| |
| // in the following comments, three numbers are spaced by 1 ulp apart, |
| // and the second one is being formatted. |
| // |
| // some tests are derived from [1]. |
| // |
| // [1] Vern Paxson, A Program for Testing IEEE Decimal-Binary Conversion |
| // ftp://ftp.ee.lbl.gov/testbase-report.ps.Z |
| |
| pub fn f32_shortest_sanity_test<F>(mut f: F) where F: FnMut(&Decoded, &mut [u8]) -> (usize, i16) { |
| // 0.0999999940395355224609375 |
| // 0.100000001490116119384765625 |
| // 0.10000000894069671630859375 |
| check_shortest!(f(0.1f32) => b"1", 0); |
| |
| // 0.333333313465118408203125 |
| // 0.3333333432674407958984375 (1/3 in the default rounding) |
| // 0.33333337306976318359375 |
| check_shortest!(f(1.0f32/3.0) => b"33333334", 0); |
| |
| // 10^1 * 0.31415917873382568359375 |
| // 10^1 * 0.31415920257568359375 |
| // 10^1 * 0.31415922641754150390625 |
| check_shortest!(f(3.141592f32) => b"3141592", 1); |
| |
| // 10^18 * 0.31415916243714048 |
| // 10^18 * 0.314159196796878848 |
| // 10^18 * 0.314159231156617216 |
| check_shortest!(f(3.141592e17f32) => b"3141592", 18); |
| |
| // regression test for decoders |
| // 10^8 * 0.3355443 |
| // 10^8 * 0.33554432 |
| // 10^8 * 0.33554436 |
| check_shortest!(f(ldexp_f32(1.0, 25)) => b"33554432", 8); |
| |
| // 10^39 * 0.340282326356119256160033759537265639424 |
| // 10^39 * 0.34028234663852885981170418348451692544 |
| // 10^39 * 0.340282366920938463463374607431768211456 |
| check_shortest!(f(f32::MAX) => b"34028235", 39); |
| |
| // 10^-37 * 0.1175494210692441075487029444849287348827... |
| // 10^-37 * 0.1175494350822287507968736537222245677818... |
| // 10^-37 * 0.1175494490952133940450443629595204006810... |
| check_shortest!(f(f32::MIN_POSITIVE) => b"11754944", -37); |
| |
| // 10^-44 * 0 |
| // 10^-44 * 0.1401298464324817070923729583289916131280... |
| // 10^-44 * 0.2802596928649634141847459166579832262560... |
| let minf32 = ldexp_f32(1.0, -149); |
| check_shortest!(f(minf32) => b"1", -44); |
| } |
| |
| pub fn f32_exact_sanity_test<F>(mut f: F) |
| where F: FnMut(&Decoded, &mut [u8], i16) -> (usize, i16) { |
| let minf32 = ldexp_f32(1.0, -149); |
| |
| check_exact!(f(0.1f32) => b"100000001490116119384765625 ", 0); |
| check_exact!(f(0.5f32) => b"5 ", 0); |
| check_exact!(f(1.0f32/3.0) => b"3333333432674407958984375 ", 0); |
| check_exact!(f(3.141592f32) => b"31415920257568359375 ", 1); |
| check_exact!(f(3.141592e17f32) => b"314159196796878848 ", 18); |
| check_exact!(f(f32::MAX) => b"34028234663852885981170418348451692544 ", 39); |
| check_exact!(f(f32::MIN_POSITIVE) => b"1175494350822287507968736537222245677818", -37); |
| check_exact!(f(minf32) => b"1401298464324817070923729583289916131280", -44); |
| |
| // [1], Table 16: Stress Inputs for Converting 24-bit Binary to Decimal, < 1/2 ULP |
| check_exact_one!(f(12676506, -102; f32) => b"2", -23); |
| check_exact_one!(f(12676506, -103; f32) => b"12", -23); |
| check_exact_one!(f(15445013, 86; f32) => b"119", 34); |
| check_exact_one!(f(13734123, -138; f32) => b"3941", -34); |
| check_exact_one!(f(12428269, -130; f32) => b"91308", -32); |
| check_exact_one!(f(15334037, -146; f32) => b"171900", -36); |
| check_exact_one!(f(11518287, -41; f32) => b"5237910", -5); |
| check_exact_one!(f(12584953, -145; f32) => b"28216440", -36); |
| check_exact_one!(f(15961084, -125; f32) => b"375243281", -30); |
| check_exact_one!(f(14915817, -146; f32) => b"1672120916", -36); |
| check_exact_one!(f(10845484, -102; f32) => b"21388945814", -23); |
| check_exact_one!(f(16431059, -61; f32) => b"712583594561", -11); |
| |
| // [1], Table 17: Stress Inputs for Converting 24-bit Binary to Decimal, > 1/2 ULP |
| check_exact_one!(f(16093626, 69; f32) => b"1", 29); |
| check_exact_one!(f( 9983778, 25; f32) => b"34", 15); |
| check_exact_one!(f(12745034, 104; f32) => b"259", 39); |
| check_exact_one!(f(12706553, 72; f32) => b"6001", 29); |
| check_exact_one!(f(11005028, 45; f32) => b"38721", 21); |
| check_exact_one!(f(15059547, 71; f32) => b"355584", 29); |
| check_exact_one!(f(16015691, -99; f32) => b"2526831", -22); |
| check_exact_one!(f( 8667859, 56; f32) => b"62458507", 24); |
| check_exact_one!(f(14855922, -82; f32) => b"307213267", -17); |
| check_exact_one!(f(14855922, -83; f32) => b"1536066333", -17); |
| check_exact_one!(f(10144164, -110; f32) => b"78147796834", -26); |
| check_exact_one!(f(13248074, 95; f32) => b"524810279937", 36); |
| } |
| |
| pub fn f64_shortest_sanity_test<F>(mut f: F) where F: FnMut(&Decoded, &mut [u8]) -> (usize, i16) { |
| // 0.0999999999999999777955395074968691915273... |
| // 0.1000000000000000055511151231257827021181... |
| // 0.1000000000000000333066907387546962127089... |
| check_shortest!(f(0.1f64) => b"1", 0); |
| |
| // this example is explicitly mentioned in the paper. |
| // 10^3 * 0.0999999999999999857891452847979962825775... |
| // 10^3 * 0.1 (exact) |
| // 10^3 * 0.1000000000000000142108547152020037174224... |
| check_shortest!(f(100.0f64) => b"1", 3); |
| |
| // 0.3333333333333332593184650249895639717578... |
| // 0.3333333333333333148296162562473909929394... (1/3 in the default rounding) |
| // 0.3333333333333333703407674875052180141210... |
| check_shortest!(f(1.0f64/3.0) => b"3333333333333333", 0); |
| |
| // explicit test case for equally closest representations. |
| // Dragon has its own tie-breaking rule; Grisu should fall back. |
| // 10^1 * 0.1000007629394531027955395074968691915273... |
| // 10^1 * 0.100000762939453125 (exact) |
| // 10^1 * 0.1000007629394531472044604925031308084726... |
| check_shortest!(f(1.00000762939453125f64) => b"10000076293945313", 1); |
| |
| // 10^1 * 0.3141591999999999718085064159822650253772... |
| // 10^1 * 0.3141592000000000162174274009885266423225... |
| // 10^1 * 0.3141592000000000606263483859947882592678... |
| check_shortest!(f(3.141592f64) => b"3141592", 1); |
| |
| // 10^18 * 0.314159199999999936 |
| // 10^18 * 0.3141592 (exact) |
| // 10^18 * 0.314159200000000064 |
| check_shortest!(f(3.141592e17f64) => b"3141592", 18); |
| |
| // regression test for decoders |
| // 10^20 * 0.18446744073709549568 |
| // 10^20 * 0.18446744073709551616 |
| // 10^20 * 0.18446744073709555712 |
| check_shortest!(f(ldexp_f64(1.0, 64)) => b"18446744073709552", 20); |
| |
| // pathological case: high = 10^23 (exact). tie breaking should always prefer that. |
| // 10^24 * 0.099999999999999974834176 |
| // 10^24 * 0.099999999999999991611392 |
| // 10^24 * 0.100000000000000008388608 |
| check_shortest!(f(1.0e23f64) => b"1", 24); |
| |
| // 10^309 * 0.1797693134862315508561243283845062402343... |
| // 10^309 * 0.1797693134862315708145274237317043567980... |
| // 10^309 * 0.1797693134862315907729305190789024733617... |
| check_shortest!(f(f64::MAX) => b"17976931348623157", 309); |
| |
| // 10^-307 * 0.2225073858507200889024586876085859887650... |
| // 10^-307 * 0.2225073858507201383090232717332404064219... |
| // 10^-307 * 0.2225073858507201877155878558578948240788... |
| check_shortest!(f(f64::MIN_POSITIVE) => b"22250738585072014", -307); |
| |
| // 10^-323 * 0 |
| // 10^-323 * 0.4940656458412465441765687928682213723650... |
| // 10^-323 * 0.9881312916824930883531375857364427447301... |
| let minf64 = ldexp_f64(1.0, -1074); |
| check_shortest!(f(minf64) => b"5", -323); |
| } |
| |
| pub fn f64_exact_sanity_test<F>(mut f: F) |
| where F: FnMut(&Decoded, &mut [u8], i16) -> (usize, i16) { |
| let minf64 = ldexp_f64(1.0, -1074); |
| |
| check_exact!(f(0.1f64) => b"1000000000000000055511151231257827021181", 0); |
| check_exact!(f(0.45f64) => b"4500000000000000111022302462515654042363", 0); |
| check_exact!(f(0.5f64) => b"5 ", 0); |
| check_exact!(f(0.95f64) => b"9499999999999999555910790149937383830547", 0); |
| check_exact!(f(100.0f64) => b"1 ", 3); |
| check_exact!(f(999.5f64) => b"9995000000000000000000000000000000000000", 3); |
| check_exact!(f(1.0f64/3.0) => b"3333333333333333148296162562473909929394", 0); |
| check_exact!(f(3.141592f64) => b"3141592000000000162174274009885266423225", 1); |
| check_exact!(f(3.141592e17f64) => b"3141592 ", 18); |
| check_exact!(f(1.0e23f64) => b"99999999999999991611392 ", 23); |
| check_exact!(f(f64::MAX) => b"1797693134862315708145274237317043567980", 309); |
| check_exact!(f(f64::MIN_POSITIVE) => b"2225073858507201383090232717332404064219", -307); |
| check_exact!(f(minf64) => b"4940656458412465441765687928682213723650\ |
| 5980261432476442558568250067550727020875\ |
| 1865299836361635992379796564695445717730\ |
| 9266567103559397963987747960107818781263\ |
| 0071319031140452784581716784898210368871\ |
| 8636056998730723050006387409153564984387\ |
| 3124733972731696151400317153853980741262\ |
| 3856559117102665855668676818703956031062\ |
| 4931945271591492455329305456544401127480\ |
| 1297099995419319894090804165633245247571\ |
| 4786901472678015935523861155013480352649\ |
| 3472019379026810710749170333222684475333\ |
| 5720832431936092382893458368060106011506\ |
| 1698097530783422773183292479049825247307\ |
| 7637592724787465608477820373446969953364\ |
| 7017972677717585125660551199131504891101\ |
| 4510378627381672509558373897335989936648\ |
| 0994116420570263709027924276754456522908\ |
| 7538682506419718265533447265625 ", -323); |
| |
| // [1], Table 3: Stress Inputs for Converting 53-bit Binary to Decimal, < 1/2 ULP |
| check_exact_one!(f(8511030020275656, -342; f64) => b"9", -87); |
| check_exact_one!(f(5201988407066741, -824; f64) => b"46", -232); |
| check_exact_one!(f(6406892948269899, 237; f64) => b"141", 88); |
| check_exact_one!(f(8431154198732492, 72; f64) => b"3981", 38); |
| check_exact_one!(f(6475049196144587, 99; f64) => b"41040", 46); |
| check_exact_one!(f(8274307542972842, 726; f64) => b"292084", 235); |
| check_exact_one!(f(5381065484265332, -456; f64) => b"2891946", -121); |
| check_exact_one!(f(6761728585499734, -1057; f64) => b"43787718", -302); |
| check_exact_one!(f(7976538478610756, 376; f64) => b"122770163", 130); |
| check_exact_one!(f(5982403858958067, 377; f64) => b"1841552452", 130); |
| check_exact_one!(f(5536995190630837, 93; f64) => b"54835744350", 44); |
| check_exact_one!(f(7225450889282194, 710; f64) => b"389190181146", 230); |
| check_exact_one!(f(7225450889282194, 709; f64) => b"1945950905732", 230); |
| check_exact_one!(f(8703372741147379, 117; f64) => b"14460958381605", 52); |
| check_exact_one!(f(8944262675275217, -1001; f64) => b"417367747458531", -285); |
| check_exact_one!(f(7459803696087692, -707; f64) => b"1107950772878888", -196); |
| check_exact_one!(f(6080469016670379, -381; f64) => b"12345501366327440", -98); |
| check_exact_one!(f(8385515147034757, 721; f64) => b"925031711960365024", 233); |
| check_exact_one!(f(7514216811389786, -828; f64) => b"4198047150284889840", -233); |
| check_exact_one!(f(8397297803260511, -345; f64) => b"11716315319786511046", -87); |
| check_exact_one!(f(6733459239310543, 202; f64) => b"432810072844612493629", 77); |
| check_exact_one!(f(8091450587292794, -473; f64) => b"3317710118160031081518", -126); |
| |
| // [1], Table 4: Stress Inputs for Converting 53-bit Binary to Decimal, > 1/2 ULP |
| check_exact_one!(f(6567258882077402, 952; f64) => b"3", 303); |
| check_exact_one!(f(6712731423444934, 535; f64) => b"76", 177); |
| check_exact_one!(f(6712731423444934, 534; f64) => b"378", 177); |
| check_exact_one!(f(5298405411573037, -957; f64) => b"4350", -272); |
| check_exact_one!(f(5137311167659507, -144; f64) => b"23037", -27); |
| check_exact_one!(f(6722280709661868, 363; f64) => b"126301", 126); |
| check_exact_one!(f(5344436398034927, -169; f64) => b"7142211", -35); |
| check_exact_one!(f(8369123604277281, -853; f64) => b"13934574", -240); |
| check_exact_one!(f(8995822108487663, -780; f64) => b"141463449", -218); |
| check_exact_one!(f(8942832835564782, -383; f64) => b"4539277920", -99); |
| check_exact_one!(f(8942832835564782, -384; f64) => b"22696389598", -99); |
| check_exact_one!(f(8942832835564782, -385; f64) => b"113481947988", -99); |
| check_exact_one!(f(6965949469487146, -249; f64) => b"7700366561890", -59); |
| check_exact_one!(f(6965949469487146, -250; f64) => b"38501832809448", -59); |
| check_exact_one!(f(6965949469487146, -251; f64) => b"192509164047238", -59); |
| check_exact_one!(f(7487252720986826, 548; f64) => b"6898586531774201", 181); |
| check_exact_one!(f(5592117679628511, 164; f64) => b"13076622631878654", 66); |
| check_exact_one!(f(8887055249355788, 665; f64) => b"136052020756121240", 217); |
| check_exact_one!(f(6994187472632449, 690; f64) => b"3592810217475959676", 224); |
| check_exact_one!(f(8797576579012143, 588; f64) => b"89125197712484551899", 193); |
| check_exact_one!(f(7363326733505337, 272; f64) => b"558769757362301140950", 98); |
| check_exact_one!(f(8549497411294502, -448; f64) => b"1176257830728540379990", -118); |
| } |
| |
| pub fn more_shortest_sanity_test<F>(mut f: F) where F: FnMut(&Decoded, &mut [u8]) -> (usize, i16) { |
| check_shortest!(f{mant: 99_999_999_999_999_999, minus: 1, plus: 1, |
| exp: 0, inclusive: true} => b"1", 18); |
| check_shortest!(f{mant: 99_999_999_999_999_999, minus: 1, plus: 1, |
| exp: 0, inclusive: false} => b"99999999999999999", 17); |
| } |
| |
| fn to_string_with_parts<F>(mut f: F) -> String |
| where F: for<'a> FnMut(&'a mut [u8], &'a mut [Part<'a>]) -> Formatted<'a> { |
| let mut buf = [0; 1024]; |
| let mut parts = [Part::Zero(0); 16]; |
| let formatted = f(&mut buf, &mut parts); |
| let mut ret = vec![0; formatted.len()]; |
| assert_eq!(formatted.write(&mut ret), Some(ret.len())); |
| String::from_utf8(ret).unwrap() |
| } |
| |
| pub fn to_shortest_str_test<F>(mut f_: F) |
| where F: FnMut(&Decoded, &mut [u8]) -> (usize, i16) { |
| use core::num::flt2dec::Sign::*; |
| |
| fn to_string<T, F>(f: &mut F, v: T, sign: Sign, frac_digits: usize, upper: bool) -> String |
| where T: DecodableFloat, F: FnMut(&Decoded, &mut [u8]) -> (usize, i16) { |
| to_string_with_parts(|buf, parts| to_shortest_str(|d,b| f(d,b), v, sign, |
| frac_digits, upper, buf, parts)) |
| } |
| |
| let f = &mut f_; |
| |
| assert_eq!(to_string(f, 0.0, Minus, 0, false), "0"); |
| assert_eq!(to_string(f, 0.0, MinusRaw, 0, false), "0"); |
| assert_eq!(to_string(f, 0.0, MinusPlus, 0, false), "+0"); |
| assert_eq!(to_string(f, 0.0, MinusPlusRaw, 0, false), "+0"); |
| assert_eq!(to_string(f, -0.0, Minus, 0, false), "0"); |
| assert_eq!(to_string(f, -0.0, MinusRaw, 0, false), "-0"); |
| assert_eq!(to_string(f, -0.0, MinusPlus, 0, false), "+0"); |
| assert_eq!(to_string(f, -0.0, MinusPlusRaw, 0, false), "-0"); |
| assert_eq!(to_string(f, 0.0, Minus, 1, true), "0.0"); |
| assert_eq!(to_string(f, 0.0, MinusRaw, 1, true), "0.0"); |
| assert_eq!(to_string(f, 0.0, MinusPlus, 1, true), "+0.0"); |
| assert_eq!(to_string(f, 0.0, MinusPlusRaw, 1, true), "+0.0"); |
| assert_eq!(to_string(f, -0.0, Minus, 8, true), "0.00000000"); |
| assert_eq!(to_string(f, -0.0, MinusRaw, 8, true), "-0.00000000"); |
| assert_eq!(to_string(f, -0.0, MinusPlus, 8, true), "+0.00000000"); |
| assert_eq!(to_string(f, -0.0, MinusPlusRaw, 8, true), "-0.00000000"); |
| |
| assert_eq!(to_string(f, 1.0/0.0, Minus, 0, false), "inf"); |
| assert_eq!(to_string(f, 1.0/0.0, MinusRaw, 0, true), "inf"); |
| assert_eq!(to_string(f, 1.0/0.0, MinusPlus, 0, false), "+inf"); |
| assert_eq!(to_string(f, 1.0/0.0, MinusPlusRaw, 0, true), "+inf"); |
| assert_eq!(to_string(f, 0.0/0.0, Minus, 0, false), "NaN"); |
| assert_eq!(to_string(f, 0.0/0.0, MinusRaw, 1, true), "NaN"); |
| assert_eq!(to_string(f, 0.0/0.0, MinusPlus, 8, false), "NaN"); |
| assert_eq!(to_string(f, 0.0/0.0, MinusPlusRaw, 64, true), "NaN"); |
| assert_eq!(to_string(f, -1.0/0.0, Minus, 0, false), "-inf"); |
| assert_eq!(to_string(f, -1.0/0.0, MinusRaw, 1, true), "-inf"); |
| assert_eq!(to_string(f, -1.0/0.0, MinusPlus, 8, false), "-inf"); |
| assert_eq!(to_string(f, -1.0/0.0, MinusPlusRaw, 64, true), "-inf"); |
| |
| assert_eq!(to_string(f, 3.14, Minus, 0, false), "3.14"); |
| assert_eq!(to_string(f, 3.14, MinusRaw, 0, false), "3.14"); |
| assert_eq!(to_string(f, 3.14, MinusPlus, 0, false), "+3.14"); |
| assert_eq!(to_string(f, 3.14, MinusPlusRaw, 0, false), "+3.14"); |
| assert_eq!(to_string(f, -3.14, Minus, 0, false), "-3.14"); |
| assert_eq!(to_string(f, -3.14, MinusRaw, 0, false), "-3.14"); |
| assert_eq!(to_string(f, -3.14, MinusPlus, 0, false), "-3.14"); |
| assert_eq!(to_string(f, -3.14, MinusPlusRaw, 0, false), "-3.14"); |
| assert_eq!(to_string(f, 3.14, Minus, 1, true), "3.14"); |
| assert_eq!(to_string(f, 3.14, MinusRaw, 2, true), "3.14"); |
| assert_eq!(to_string(f, 3.14, MinusPlus, 3, true), "+3.140"); |
| assert_eq!(to_string(f, 3.14, MinusPlusRaw, 4, true), "+3.1400"); |
| assert_eq!(to_string(f, -3.14, Minus, 8, true), "-3.14000000"); |
| assert_eq!(to_string(f, -3.14, MinusRaw, 8, true), "-3.14000000"); |
| assert_eq!(to_string(f, -3.14, MinusPlus, 8, true), "-3.14000000"); |
| assert_eq!(to_string(f, -3.14, MinusPlusRaw, 8, true), "-3.14000000"); |
| |
| assert_eq!(to_string(f, 7.5e-11, Minus, 0, false), "0.000000000075"); |
| assert_eq!(to_string(f, 7.5e-11, Minus, 3, false), "0.000000000075"); |
| assert_eq!(to_string(f, 7.5e-11, Minus, 12, false), "0.000000000075"); |
| assert_eq!(to_string(f, 7.5e-11, Minus, 13, false), "0.0000000000750"); |
| |
| assert_eq!(to_string(f, 1.9971e20, Minus, 0, false), "199710000000000000000"); |
| assert_eq!(to_string(f, 1.9971e20, Minus, 1, false), "199710000000000000000.0"); |
| assert_eq!(to_string(f, 1.9971e20, Minus, 8, false), "199710000000000000000.00000000"); |
| |
| assert_eq!(to_string(f, f32::MAX, Minus, 0, false), format!("34028235{:0>31}", "")); |
| assert_eq!(to_string(f, f32::MAX, Minus, 1, false), format!("34028235{:0>31}.0", "")); |
| assert_eq!(to_string(f, f32::MAX, Minus, 8, false), format!("34028235{:0>31}.00000000", "")); |
| |
| let minf32 = ldexp_f32(1.0, -149); |
| assert_eq!(to_string(f, minf32, Minus, 0, false), format!("0.{:0>44}1", "")); |
| assert_eq!(to_string(f, minf32, Minus, 45, false), format!("0.{:0>44}1", "")); |
| assert_eq!(to_string(f, minf32, Minus, 46, false), format!("0.{:0>44}10", "")); |
| |
| assert_eq!(to_string(f, f64::MAX, Minus, 0, false), |
| format!("17976931348623157{:0>292}", "")); |
| assert_eq!(to_string(f, f64::MAX, Minus, 1, false), |
| format!("17976931348623157{:0>292}.0", "")); |
| assert_eq!(to_string(f, f64::MAX, Minus, 8, false), |
| format!("17976931348623157{:0>292}.00000000", "")); |
| |
| let minf64 = ldexp_f64(1.0, -1074); |
| assert_eq!(to_string(f, minf64, Minus, 0, false), format!("0.{:0>323}5", "")); |
| assert_eq!(to_string(f, minf64, Minus, 324, false), format!("0.{:0>323}5", "")); |
| assert_eq!(to_string(f, minf64, Minus, 325, false), format!("0.{:0>323}50", "")); |
| |
| // very large output |
| assert_eq!(to_string(f, 1.1, Minus, 80000, false), format!("1.1{:0>79999}", "")); |
| } |
| |
| pub fn to_shortest_exp_str_test<F>(mut f_: F) |
| where F: FnMut(&Decoded, &mut [u8]) -> (usize, i16) { |
| use core::num::flt2dec::Sign::*; |
| |
| fn to_string<T, F>(f: &mut F, v: T, sign: Sign, exp_bounds: (i16, i16), upper: bool) -> String |
| where T: DecodableFloat, F: FnMut(&Decoded, &mut [u8]) -> (usize, i16) { |
| to_string_with_parts(|buf, parts| to_shortest_exp_str(|d,b| f(d,b), v, sign, |
| exp_bounds, upper, buf, parts)) |
| } |
| |
| let f = &mut f_; |
| |
| assert_eq!(to_string(f, 0.0, Minus, (-4, 16), false), "0"); |
| assert_eq!(to_string(f, 0.0, MinusRaw, (-4, 16), false), "0"); |
| assert_eq!(to_string(f, 0.0, MinusPlus, (-4, 16), false), "+0"); |
| assert_eq!(to_string(f, 0.0, MinusPlusRaw, (-4, 16), false), "+0"); |
| assert_eq!(to_string(f, -0.0, Minus, (-4, 16), false), "0"); |
| assert_eq!(to_string(f, -0.0, MinusRaw, (-4, 16), false), "-0"); |
| assert_eq!(to_string(f, -0.0, MinusPlus, (-4, 16), false), "+0"); |
| assert_eq!(to_string(f, -0.0, MinusPlusRaw, (-4, 16), false), "-0"); |
| assert_eq!(to_string(f, 0.0, Minus, ( 0, 0), true), "0E0"); |
| assert_eq!(to_string(f, 0.0, MinusRaw, ( 0, 0), false), "0e0"); |
| assert_eq!(to_string(f, 0.0, MinusPlus, (-9, -5), true), "+0E0"); |
| assert_eq!(to_string(f, 0.0, MinusPlusRaw, ( 5, 9), false), "+0e0"); |
| assert_eq!(to_string(f, -0.0, Minus, ( 0, 0), true), "0E0"); |
| assert_eq!(to_string(f, -0.0, MinusRaw, ( 0, 0), false), "-0e0"); |
| assert_eq!(to_string(f, -0.0, MinusPlus, (-9, -5), true), "+0E0"); |
| assert_eq!(to_string(f, -0.0, MinusPlusRaw, ( 5, 9), false), "-0e0"); |
| |
| assert_eq!(to_string(f, 1.0/0.0, Minus, (-4, 16), false), "inf"); |
| assert_eq!(to_string(f, 1.0/0.0, MinusRaw, (-4, 16), true), "inf"); |
| assert_eq!(to_string(f, 1.0/0.0, MinusPlus, (-4, 16), false), "+inf"); |
| assert_eq!(to_string(f, 1.0/0.0, MinusPlusRaw, (-4, 16), true), "+inf"); |
| assert_eq!(to_string(f, 0.0/0.0, Minus, ( 0, 0), false), "NaN"); |
| assert_eq!(to_string(f, 0.0/0.0, MinusRaw, ( 0, 0), true), "NaN"); |
| assert_eq!(to_string(f, 0.0/0.0, MinusPlus, (-9, -5), false), "NaN"); |
| assert_eq!(to_string(f, 0.0/0.0, MinusPlusRaw, ( 5, 9), true), "NaN"); |
| assert_eq!(to_string(f, -1.0/0.0, Minus, ( 0, 0), false), "-inf"); |
| assert_eq!(to_string(f, -1.0/0.0, MinusRaw, ( 0, 0), true), "-inf"); |
| assert_eq!(to_string(f, -1.0/0.0, MinusPlus, (-9, -5), false), "-inf"); |
| assert_eq!(to_string(f, -1.0/0.0, MinusPlusRaw, ( 5, 9), true), "-inf"); |
| |
| assert_eq!(to_string(f, 3.14, Minus, (-4, 16), false), "3.14"); |
| assert_eq!(to_string(f, 3.14, MinusRaw, (-4, 16), false), "3.14"); |
| assert_eq!(to_string(f, 3.14, MinusPlus, (-4, 16), false), "+3.14"); |
| assert_eq!(to_string(f, 3.14, MinusPlusRaw, (-4, 16), false), "+3.14"); |
| assert_eq!(to_string(f, -3.14, Minus, (-4, 16), false), "-3.14"); |
| assert_eq!(to_string(f, -3.14, MinusRaw, (-4, 16), false), "-3.14"); |
| assert_eq!(to_string(f, -3.14, MinusPlus, (-4, 16), false), "-3.14"); |
| assert_eq!(to_string(f, -3.14, MinusPlusRaw, (-4, 16), false), "-3.14"); |
| assert_eq!(to_string(f, 3.14, Minus, ( 0, 0), true), "3.14E0"); |
| assert_eq!(to_string(f, 3.14, MinusRaw, ( 0, 0), false), "3.14e0"); |
| assert_eq!(to_string(f, 3.14, MinusPlus, (-9, -5), true), "+3.14E0"); |
| assert_eq!(to_string(f, 3.14, MinusPlusRaw, ( 5, 9), false), "+3.14e0"); |
| assert_eq!(to_string(f, -3.14, Minus, ( 0, 0), true), "-3.14E0"); |
| assert_eq!(to_string(f, -3.14, MinusRaw, ( 0, 0), false), "-3.14e0"); |
| assert_eq!(to_string(f, -3.14, MinusPlus, (-9, -5), true), "-3.14E0"); |
| assert_eq!(to_string(f, -3.14, MinusPlusRaw, ( 5, 9), false), "-3.14e0"); |
| |
| assert_eq!(to_string(f, 0.1, Minus, (-4, 16), false), "0.1"); |
| assert_eq!(to_string(f, 0.1, MinusRaw, (-4, 16), false), "0.1"); |
| assert_eq!(to_string(f, 0.1, MinusPlus, (-4, 16), false), "+0.1"); |
| assert_eq!(to_string(f, 0.1, MinusPlusRaw, (-4, 16), false), "+0.1"); |
| assert_eq!(to_string(f, -0.1, Minus, (-4, 16), false), "-0.1"); |
| assert_eq!(to_string(f, -0.1, MinusRaw, (-4, 16), false), "-0.1"); |
| assert_eq!(to_string(f, -0.1, MinusPlus, (-4, 16), false), "-0.1"); |
| assert_eq!(to_string(f, -0.1, MinusPlusRaw, (-4, 16), false), "-0.1"); |
| assert_eq!(to_string(f, 0.1, Minus, ( 0, 0), true), "1E-1"); |
| assert_eq!(to_string(f, 0.1, MinusRaw, ( 0, 0), false), "1e-1"); |
| assert_eq!(to_string(f, 0.1, MinusPlus, (-9, -5), true), "+1E-1"); |
| assert_eq!(to_string(f, 0.1, MinusPlusRaw, ( 5, 9), false), "+1e-1"); |
| assert_eq!(to_string(f, -0.1, Minus, ( 0, 0), true), "-1E-1"); |
| assert_eq!(to_string(f, -0.1, MinusRaw, ( 0, 0), false), "-1e-1"); |
| assert_eq!(to_string(f, -0.1, MinusPlus, (-9, -5), true), "-1E-1"); |
| assert_eq!(to_string(f, -0.1, MinusPlusRaw, ( 5, 9), false), "-1e-1"); |
| |
| assert_eq!(to_string(f, 7.5e-11, Minus, ( -4, 16), false), "7.5e-11"); |
| assert_eq!(to_string(f, 7.5e-11, Minus, (-11, 10), false), "0.000000000075"); |
| assert_eq!(to_string(f, 7.5e-11, Minus, (-10, 11), false), "7.5e-11"); |
| |
| assert_eq!(to_string(f, 1.9971e20, Minus, ( -4, 16), false), "1.9971e20"); |
| assert_eq!(to_string(f, 1.9971e20, Minus, (-20, 21), false), "199710000000000000000"); |
| assert_eq!(to_string(f, 1.9971e20, Minus, (-21, 20), false), "1.9971e20"); |
| |
| // the true value of 1.0e23f64 is less than 10^23, but that shouldn't matter here |
| assert_eq!(to_string(f, 1.0e23, Minus, (22, 23), false), "1e23"); |
| assert_eq!(to_string(f, 1.0e23, Minus, (23, 24), false), "100000000000000000000000"); |
| assert_eq!(to_string(f, 1.0e23, Minus, (24, 25), false), "1e23"); |
| |
| assert_eq!(to_string(f, f32::MAX, Minus, ( -4, 16), false), "3.4028235e38"); |
| assert_eq!(to_string(f, f32::MAX, Minus, (-39, 38), false), "3.4028235e38"); |
| assert_eq!(to_string(f, f32::MAX, Minus, (-38, 39), false), format!("34028235{:0>31}", "")); |
| |
| let minf32 = ldexp_f32(1.0, -149); |
| assert_eq!(to_string(f, minf32, Minus, ( -4, 16), false), "1e-45"); |
| assert_eq!(to_string(f, minf32, Minus, (-44, 45), false), "1e-45"); |
| assert_eq!(to_string(f, minf32, Minus, (-45, 44), false), format!("0.{:0>44}1", "")); |
| |
| assert_eq!(to_string(f, f64::MAX, Minus, ( -4, 16), false), |
| "1.7976931348623157e308"); |
| assert_eq!(to_string(f, f64::MAX, Minus, (-308, 309), false), |
| format!("17976931348623157{:0>292}", "")); |
| assert_eq!(to_string(f, f64::MAX, Minus, (-309, 308), false), |
| "1.7976931348623157e308"); |
| |
| let minf64 = ldexp_f64(1.0, -1074); |
| assert_eq!(to_string(f, minf64, Minus, ( -4, 16), false), "5e-324"); |
| assert_eq!(to_string(f, minf64, Minus, (-324, 323), false), format!("0.{:0>323}5", "")); |
| assert_eq!(to_string(f, minf64, Minus, (-323, 324), false), "5e-324"); |
| |
| assert_eq!(to_string(f, 1.1, Minus, (i16::MIN, i16::MAX), false), "1.1"); |
| } |
| |
| pub fn to_exact_exp_str_test<F>(mut f_: F) |
| where F: FnMut(&Decoded, &mut [u8], i16) -> (usize, i16) { |
| use core::num::flt2dec::Sign::*; |
| |
| fn to_string<T, F>(f: &mut F, v: T, sign: Sign, ndigits: usize, upper: bool) -> String |
| where T: DecodableFloat, F: FnMut(&Decoded, &mut [u8], i16) -> (usize, i16) { |
| to_string_with_parts(|buf, parts| to_exact_exp_str(|d,b,l| f(d,b,l), v, sign, |
| ndigits, upper, buf, parts)) |
| } |
| |
| let f = &mut f_; |
| |
| assert_eq!(to_string(f, 0.0, Minus, 1, true), "0E0"); |
| assert_eq!(to_string(f, 0.0, MinusRaw, 1, false), "0e0"); |
| assert_eq!(to_string(f, 0.0, MinusPlus, 1, true), "+0E0"); |
| assert_eq!(to_string(f, 0.0, MinusPlusRaw, 1, false), "+0e0"); |
| assert_eq!(to_string(f, -0.0, Minus, 1, true), "0E0"); |
| assert_eq!(to_string(f, -0.0, MinusRaw, 1, false), "-0e0"); |
| assert_eq!(to_string(f, -0.0, MinusPlus, 1, true), "+0E0"); |
| assert_eq!(to_string(f, -0.0, MinusPlusRaw, 1, false), "-0e0"); |
| assert_eq!(to_string(f, 0.0, Minus, 2, true), "0.0E0"); |
| assert_eq!(to_string(f, 0.0, MinusRaw, 2, false), "0.0e0"); |
| assert_eq!(to_string(f, 0.0, MinusPlus, 2, true), "+0.0E0"); |
| assert_eq!(to_string(f, 0.0, MinusPlusRaw, 2, false), "+0.0e0"); |
| assert_eq!(to_string(f, -0.0, Minus, 8, true), "0.0000000E0"); |
| assert_eq!(to_string(f, -0.0, MinusRaw, 8, false), "-0.0000000e0"); |
| assert_eq!(to_string(f, -0.0, MinusPlus, 8, true), "+0.0000000E0"); |
| assert_eq!(to_string(f, -0.0, MinusPlusRaw, 8, false), "-0.0000000e0"); |
| |
| assert_eq!(to_string(f, 1.0/0.0, Minus, 1, false), "inf"); |
| assert_eq!(to_string(f, 1.0/0.0, MinusRaw, 1, true), "inf"); |
| assert_eq!(to_string(f, 1.0/0.0, MinusPlus, 1, false), "+inf"); |
| assert_eq!(to_string(f, 1.0/0.0, MinusPlusRaw, 1, true), "+inf"); |
| assert_eq!(to_string(f, 0.0/0.0, Minus, 8, false), "NaN"); |
| assert_eq!(to_string(f, 0.0/0.0, MinusRaw, 8, true), "NaN"); |
| assert_eq!(to_string(f, 0.0/0.0, MinusPlus, 8, false), "NaN"); |
| assert_eq!(to_string(f, 0.0/0.0, MinusPlusRaw, 8, true), "NaN"); |
| assert_eq!(to_string(f, -1.0/0.0, Minus, 64, false), "-inf"); |
| assert_eq!(to_string(f, -1.0/0.0, MinusRaw, 64, true), "-inf"); |
| assert_eq!(to_string(f, -1.0/0.0, MinusPlus, 64, false), "-inf"); |
| assert_eq!(to_string(f, -1.0/0.0, MinusPlusRaw, 64, true), "-inf"); |
| |
| assert_eq!(to_string(f, 3.14, Minus, 1, true), "3E0"); |
| assert_eq!(to_string(f, 3.14, MinusRaw, 1, false), "3e0"); |
| assert_eq!(to_string(f, 3.14, MinusPlus, 1, true), "+3E0"); |
| assert_eq!(to_string(f, 3.14, MinusPlusRaw, 1, false), "+3e0"); |
| assert_eq!(to_string(f, -3.14, Minus, 2, true), "-3.1E0"); |
| assert_eq!(to_string(f, -3.14, MinusRaw, 2, false), "-3.1e0"); |
| assert_eq!(to_string(f, -3.14, MinusPlus, 2, true), "-3.1E0"); |
| assert_eq!(to_string(f, -3.14, MinusPlusRaw, 2, false), "-3.1e0"); |
| assert_eq!(to_string(f, 3.14, Minus, 3, true), "3.14E0"); |
| assert_eq!(to_string(f, 3.14, MinusRaw, 3, false), "3.14e0"); |
| assert_eq!(to_string(f, 3.14, MinusPlus, 3, true), "+3.14E0"); |
| assert_eq!(to_string(f, 3.14, MinusPlusRaw, 3, false), "+3.14e0"); |
| assert_eq!(to_string(f, -3.14, Minus, 4, true), "-3.140E0"); |
| assert_eq!(to_string(f, -3.14, MinusRaw, 4, false), "-3.140e0"); |
| assert_eq!(to_string(f, -3.14, MinusPlus, 4, true), "-3.140E0"); |
| assert_eq!(to_string(f, -3.14, MinusPlusRaw, 4, false), "-3.140e0"); |
| |
| assert_eq!(to_string(f, 0.195, Minus, 1, false), "2e-1"); |
| assert_eq!(to_string(f, 0.195, MinusRaw, 1, true), "2E-1"); |
| assert_eq!(to_string(f, 0.195, MinusPlus, 1, false), "+2e-1"); |
| assert_eq!(to_string(f, 0.195, MinusPlusRaw, 1, true), "+2E-1"); |
| assert_eq!(to_string(f, -0.195, Minus, 2, false), "-2.0e-1"); |
| assert_eq!(to_string(f, -0.195, MinusRaw, 2, true), "-2.0E-1"); |
| assert_eq!(to_string(f, -0.195, MinusPlus, 2, false), "-2.0e-1"); |
| assert_eq!(to_string(f, -0.195, MinusPlusRaw, 2, true), "-2.0E-1"); |
| assert_eq!(to_string(f, 0.195, Minus, 3, false), "1.95e-1"); |
| assert_eq!(to_string(f, 0.195, MinusRaw, 3, true), "1.95E-1"); |
| assert_eq!(to_string(f, 0.195, MinusPlus, 3, false), "+1.95e-1"); |
| assert_eq!(to_string(f, 0.195, MinusPlusRaw, 3, true), "+1.95E-1"); |
| assert_eq!(to_string(f, -0.195, Minus, 4, false), "-1.950e-1"); |
| assert_eq!(to_string(f, -0.195, MinusRaw, 4, true), "-1.950E-1"); |
| assert_eq!(to_string(f, -0.195, MinusPlus, 4, false), "-1.950e-1"); |
| assert_eq!(to_string(f, -0.195, MinusPlusRaw, 4, true), "-1.950E-1"); |
| |
| assert_eq!(to_string(f, 9.5, Minus, 1, false), "1e1"); |
| assert_eq!(to_string(f, 9.5, Minus, 2, false), "9.5e0"); |
| assert_eq!(to_string(f, 9.5, Minus, 3, false), "9.50e0"); |
| assert_eq!(to_string(f, 9.5, Minus, 30, false), "9.50000000000000000000000000000e0"); |
| |
| assert_eq!(to_string(f, 1.0e25, Minus, 1, false), "1e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 2, false), "1.0e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 15, false), "1.00000000000000e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 16, false), "1.000000000000000e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 17, false), "1.0000000000000001e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 18, false), "1.00000000000000009e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 19, false), "1.000000000000000091e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 20, false), "1.0000000000000000906e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 21, false), "1.00000000000000009060e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 22, false), "1.000000000000000090597e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 23, false), "1.0000000000000000905970e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 24, false), "1.00000000000000009059697e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 25, false), "1.000000000000000090596966e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 26, false), "1.0000000000000000905969664e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 27, false), "1.00000000000000009059696640e25"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 30, false), "1.00000000000000009059696640000e25"); |
| |
| assert_eq!(to_string(f, 1.0e-6, Minus, 1, false), "1e-6"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 2, false), "1.0e-6"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 16, false), "1.000000000000000e-6"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 17, false), "9.9999999999999995e-7"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 18, false), "9.99999999999999955e-7"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 19, false), "9.999999999999999547e-7"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 20, false), "9.9999999999999995475e-7"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 30, false), "9.99999999999999954748111825886e-7"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 40, false), |
| "9.999999999999999547481118258862586856139e-7"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 50, false), |
| "9.9999999999999995474811182588625868561393872369081e-7"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 60, false), |
| "9.99999999999999954748111825886258685613938723690807819366455e-7"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 70, false), |
| "9.999999999999999547481118258862586856139387236908078193664550781250000e-7"); |
| |
| assert_eq!(to_string(f, f32::MAX, Minus, 1, false), "3e38"); |
| assert_eq!(to_string(f, f32::MAX, Minus, 2, false), "3.4e38"); |
| assert_eq!(to_string(f, f32::MAX, Minus, 4, false), "3.403e38"); |
| assert_eq!(to_string(f, f32::MAX, Minus, 8, false), "3.4028235e38"); |
| assert_eq!(to_string(f, f32::MAX, Minus, 16, false), "3.402823466385289e38"); |
| assert_eq!(to_string(f, f32::MAX, Minus, 32, false), "3.4028234663852885981170418348452e38"); |
| assert_eq!(to_string(f, f32::MAX, Minus, 64, false), |
| "3.402823466385288598117041834845169254400000000000000000000000000e38"); |
| |
| let minf32 = ldexp_f32(1.0, -149); |
| assert_eq!(to_string(f, minf32, Minus, 1, false), "1e-45"); |
| assert_eq!(to_string(f, minf32, Minus, 2, false), "1.4e-45"); |
| assert_eq!(to_string(f, minf32, Minus, 4, false), "1.401e-45"); |
| assert_eq!(to_string(f, minf32, Minus, 8, false), "1.4012985e-45"); |
| assert_eq!(to_string(f, minf32, Minus, 16, false), "1.401298464324817e-45"); |
| assert_eq!(to_string(f, minf32, Minus, 32, false), "1.4012984643248170709237295832899e-45"); |
| assert_eq!(to_string(f, minf32, Minus, 64, false), |
| "1.401298464324817070923729583289916131280261941876515771757068284e-45"); |
| assert_eq!(to_string(f, minf32, Minus, 128, false), |
| "1.401298464324817070923729583289916131280261941876515771757068283\ |
| 8897910826858606014866381883621215820312500000000000000000000000e-45"); |
| |
| assert_eq!(to_string(f, f64::MAX, Minus, 1, false), "2e308"); |
| assert_eq!(to_string(f, f64::MAX, Minus, 2, false), "1.8e308"); |
| assert_eq!(to_string(f, f64::MAX, Minus, 4, false), "1.798e308"); |
| assert_eq!(to_string(f, f64::MAX, Minus, 8, false), "1.7976931e308"); |
| assert_eq!(to_string(f, f64::MAX, Minus, 16, false), "1.797693134862316e308"); |
| assert_eq!(to_string(f, f64::MAX, Minus, 32, false), "1.7976931348623157081452742373170e308"); |
| assert_eq!(to_string(f, f64::MAX, Minus, 64, false), |
| "1.797693134862315708145274237317043567980705675258449965989174768e308"); |
| assert_eq!(to_string(f, f64::MAX, Minus, 128, false), |
| "1.797693134862315708145274237317043567980705675258449965989174768\ |
| 0315726078002853876058955863276687817154045895351438246423432133e308"); |
| assert_eq!(to_string(f, f64::MAX, Minus, 256, false), |
| "1.797693134862315708145274237317043567980705675258449965989174768\ |
| 0315726078002853876058955863276687817154045895351438246423432132\ |
| 6889464182768467546703537516986049910576551282076245490090389328\ |
| 9440758685084551339423045832369032229481658085593321233482747978e308"); |
| assert_eq!(to_string(f, f64::MAX, Minus, 512, false), |
| "1.797693134862315708145274237317043567980705675258449965989174768\ |
| 0315726078002853876058955863276687817154045895351438246423432132\ |
| 6889464182768467546703537516986049910576551282076245490090389328\ |
| 9440758685084551339423045832369032229481658085593321233482747978\ |
| 2620414472316873817718091929988125040402618412485836800000000000\ |
| 0000000000000000000000000000000000000000000000000000000000000000\ |
| 0000000000000000000000000000000000000000000000000000000000000000\ |
| 0000000000000000000000000000000000000000000000000000000000000000e308"); |
| |
| // okay, this is becoming tough. fortunately for us, this is almost the worst case. |
| let minf64 = ldexp_f64(1.0, -1074); |
| assert_eq!(to_string(f, minf64, Minus, 1, false), "5e-324"); |
| assert_eq!(to_string(f, minf64, Minus, 2, false), "4.9e-324"); |
| assert_eq!(to_string(f, minf64, Minus, 4, false), "4.941e-324"); |
| assert_eq!(to_string(f, minf64, Minus, 8, false), "4.9406565e-324"); |
| assert_eq!(to_string(f, minf64, Minus, 16, false), "4.940656458412465e-324"); |
| assert_eq!(to_string(f, minf64, Minus, 32, false), "4.9406564584124654417656879286822e-324"); |
| assert_eq!(to_string(f, minf64, Minus, 64, false), |
| "4.940656458412465441765687928682213723650598026143247644255856825e-324"); |
| assert_eq!(to_string(f, minf64, Minus, 128, false), |
| "4.940656458412465441765687928682213723650598026143247644255856825\ |
| 0067550727020875186529983636163599237979656469544571773092665671e-324"); |
| assert_eq!(to_string(f, minf64, Minus, 256, false), |
| "4.940656458412465441765687928682213723650598026143247644255856825\ |
| 0067550727020875186529983636163599237979656469544571773092665671\ |
| 0355939796398774796010781878126300713190311404527845817167848982\ |
| 1036887186360569987307230500063874091535649843873124733972731696e-324"); |
| assert_eq!(to_string(f, minf64, Minus, 512, false), |
| "4.940656458412465441765687928682213723650598026143247644255856825\ |
| 0067550727020875186529983636163599237979656469544571773092665671\ |
| 0355939796398774796010781878126300713190311404527845817167848982\ |
| 1036887186360569987307230500063874091535649843873124733972731696\ |
| 1514003171538539807412623856559117102665855668676818703956031062\ |
| 4931945271591492455329305456544401127480129709999541931989409080\ |
| 4165633245247571478690147267801593552386115501348035264934720193\ |
| 7902681071074917033322268447533357208324319360923828934583680601e-324"); |
| assert_eq!(to_string(f, minf64, Minus, 1024, false), |
| "4.940656458412465441765687928682213723650598026143247644255856825\ |
| 0067550727020875186529983636163599237979656469544571773092665671\ |
| 0355939796398774796010781878126300713190311404527845817167848982\ |
| 1036887186360569987307230500063874091535649843873124733972731696\ |
| 1514003171538539807412623856559117102665855668676818703956031062\ |
| 4931945271591492455329305456544401127480129709999541931989409080\ |
| 4165633245247571478690147267801593552386115501348035264934720193\ |
| 7902681071074917033322268447533357208324319360923828934583680601\ |
| 0601150616980975307834227731832924790498252473077637592724787465\ |
| 6084778203734469699533647017972677717585125660551199131504891101\ |
| 4510378627381672509558373897335989936648099411642057026370902792\ |
| 4276754456522908753868250641971826553344726562500000000000000000\ |
| 0000000000000000000000000000000000000000000000000000000000000000\ |
| 0000000000000000000000000000000000000000000000000000000000000000\ |
| 0000000000000000000000000000000000000000000000000000000000000000\ |
| 0000000000000000000000000000000000000000000000000000000000000000e-324"); |
| |
| // very large output |
| assert_eq!(to_string(f, 0.0, Minus, 80000, false), format!("0.{:0>79999}e0", "")); |
| assert_eq!(to_string(f, 1.0e1, Minus, 80000, false), format!("1.{:0>79999}e1", "")); |
| assert_eq!(to_string(f, 1.0e0, Minus, 80000, false), format!("1.{:0>79999}e0", "")); |
| assert_eq!(to_string(f, 1.0e-1, Minus, 80000, false), |
| format!("1.000000000000000055511151231257827021181583404541015625{:0>79945}\ |
| e-1", "")); |
| assert_eq!(to_string(f, 1.0e-20, Minus, 80000, false), |
| format!("9.999999999999999451532714542095716517295037027873924471077157760\ |
| 66783064379706047475337982177734375{:0>79901}e-21", "")); |
| } |
| |
| pub fn to_exact_fixed_str_test<F>(mut f_: F) |
| where F: FnMut(&Decoded, &mut [u8], i16) -> (usize, i16) { |
| use core::num::flt2dec::Sign::*; |
| |
| fn to_string<T, F>(f: &mut F, v: T, sign: Sign, frac_digits: usize, upper: bool) -> String |
| where T: DecodableFloat, F: FnMut(&Decoded, &mut [u8], i16) -> (usize, i16) { |
| to_string_with_parts(|buf, parts| to_exact_fixed_str(|d,b,l| f(d,b,l), v, sign, |
| frac_digits, upper, buf, parts)) |
| } |
| |
| let f = &mut f_; |
| |
| assert_eq!(to_string(f, 0.0, Minus, 0, false), "0"); |
| assert_eq!(to_string(f, 0.0, MinusRaw, 0, false), "0"); |
| assert_eq!(to_string(f, 0.0, MinusPlus, 0, false), "+0"); |
| assert_eq!(to_string(f, 0.0, MinusPlusRaw, 0, false), "+0"); |
| assert_eq!(to_string(f, -0.0, Minus, 0, false), "0"); |
| assert_eq!(to_string(f, -0.0, MinusRaw, 0, false), "-0"); |
| assert_eq!(to_string(f, -0.0, MinusPlus, 0, false), "+0"); |
| assert_eq!(to_string(f, -0.0, MinusPlusRaw, 0, false), "-0"); |
| assert_eq!(to_string(f, 0.0, Minus, 1, true), "0.0"); |
| assert_eq!(to_string(f, 0.0, MinusRaw, 1, true), "0.0"); |
| assert_eq!(to_string(f, 0.0, MinusPlus, 1, true), "+0.0"); |
| assert_eq!(to_string(f, 0.0, MinusPlusRaw, 1, true), "+0.0"); |
| assert_eq!(to_string(f, -0.0, Minus, 8, true), "0.00000000"); |
| assert_eq!(to_string(f, -0.0, MinusRaw, 8, true), "-0.00000000"); |
| assert_eq!(to_string(f, -0.0, MinusPlus, 8, true), "+0.00000000"); |
| assert_eq!(to_string(f, -0.0, MinusPlusRaw, 8, true), "-0.00000000"); |
| |
| assert_eq!(to_string(f, 1.0/0.0, Minus, 0, false), "inf"); |
| assert_eq!(to_string(f, 1.0/0.0, MinusRaw, 1, true), "inf"); |
| assert_eq!(to_string(f, 1.0/0.0, MinusPlus, 8, false), "+inf"); |
| assert_eq!(to_string(f, 1.0/0.0, MinusPlusRaw, 64, true), "+inf"); |
| assert_eq!(to_string(f, 0.0/0.0, Minus, 0, false), "NaN"); |
| assert_eq!(to_string(f, 0.0/0.0, MinusRaw, 1, true), "NaN"); |
| assert_eq!(to_string(f, 0.0/0.0, MinusPlus, 8, false), "NaN"); |
| assert_eq!(to_string(f, 0.0/0.0, MinusPlusRaw, 64, true), "NaN"); |
| assert_eq!(to_string(f, -1.0/0.0, Minus, 0, false), "-inf"); |
| assert_eq!(to_string(f, -1.0/0.0, MinusRaw, 1, true), "-inf"); |
| assert_eq!(to_string(f, -1.0/0.0, MinusPlus, 8, false), "-inf"); |
| assert_eq!(to_string(f, -1.0/0.0, MinusPlusRaw, 64, true), "-inf"); |
| |
| assert_eq!(to_string(f, 3.14, Minus, 0, false), "3"); |
| assert_eq!(to_string(f, 3.14, MinusRaw, 0, false), "3"); |
| assert_eq!(to_string(f, 3.14, MinusPlus, 0, false), "+3"); |
| assert_eq!(to_string(f, 3.14, MinusPlusRaw, 0, false), "+3"); |
| assert_eq!(to_string(f, -3.14, Minus, 0, false), "-3"); |
| assert_eq!(to_string(f, -3.14, MinusRaw, 0, false), "-3"); |
| assert_eq!(to_string(f, -3.14, MinusPlus, 0, false), "-3"); |
| assert_eq!(to_string(f, -3.14, MinusPlusRaw, 0, false), "-3"); |
| assert_eq!(to_string(f, 3.14, Minus, 1, true), "3.1"); |
| assert_eq!(to_string(f, 3.14, MinusRaw, 2, true), "3.14"); |
| assert_eq!(to_string(f, 3.14, MinusPlus, 3, true), "+3.140"); |
| assert_eq!(to_string(f, 3.14, MinusPlusRaw, 4, true), "+3.1400"); |
| assert_eq!(to_string(f, -3.14, Minus, 8, true), "-3.14000000"); |
| assert_eq!(to_string(f, -3.14, MinusRaw, 8, true), "-3.14000000"); |
| assert_eq!(to_string(f, -3.14, MinusPlus, 8, true), "-3.14000000"); |
| assert_eq!(to_string(f, -3.14, MinusPlusRaw, 8, true), "-3.14000000"); |
| |
| assert_eq!(to_string(f, 0.195, Minus, 0, false), "0"); |
| assert_eq!(to_string(f, 0.195, MinusRaw, 0, false), "0"); |
| assert_eq!(to_string(f, 0.195, MinusPlus, 0, false), "+0"); |
| assert_eq!(to_string(f, 0.195, MinusPlusRaw, 0, false), "+0"); |
| assert_eq!(to_string(f, -0.195, Minus, 0, false), "-0"); |
| assert_eq!(to_string(f, -0.195, MinusRaw, 0, false), "-0"); |
| assert_eq!(to_string(f, -0.195, MinusPlus, 0, false), "-0"); |
| assert_eq!(to_string(f, -0.195, MinusPlusRaw, 0, false), "-0"); |
| assert_eq!(to_string(f, 0.195, Minus, 1, true), "0.2"); |
| assert_eq!(to_string(f, 0.195, MinusRaw, 2, true), "0.20"); |
| assert_eq!(to_string(f, 0.195, MinusPlus, 3, true), "+0.195"); |
| assert_eq!(to_string(f, 0.195, MinusPlusRaw, 4, true), "+0.1950"); |
| assert_eq!(to_string(f, -0.195, Minus, 5, true), "-0.19500"); |
| assert_eq!(to_string(f, -0.195, MinusRaw, 6, true), "-0.195000"); |
| assert_eq!(to_string(f, -0.195, MinusPlus, 7, true), "-0.1950000"); |
| assert_eq!(to_string(f, -0.195, MinusPlusRaw, 8, true), "-0.19500000"); |
| |
| assert_eq!(to_string(f, 999.5, Minus, 0, false), "1000"); |
| assert_eq!(to_string(f, 999.5, Minus, 1, false), "999.5"); |
| assert_eq!(to_string(f, 999.5, Minus, 2, false), "999.50"); |
| assert_eq!(to_string(f, 999.5, Minus, 3, false), "999.500"); |
| assert_eq!(to_string(f, 999.5, Minus, 30, false), "999.500000000000000000000000000000"); |
| |
| assert_eq!(to_string(f, 0.5, Minus, 0, false), "1"); |
| assert_eq!(to_string(f, 0.5, Minus, 1, false), "0.5"); |
| assert_eq!(to_string(f, 0.5, Minus, 2, false), "0.50"); |
| assert_eq!(to_string(f, 0.5, Minus, 3, false), "0.500"); |
| |
| assert_eq!(to_string(f, 0.95, Minus, 0, false), "1"); |
| assert_eq!(to_string(f, 0.95, Minus, 1, false), "0.9"); // because it really is less than 0.95 |
| assert_eq!(to_string(f, 0.95, Minus, 2, false), "0.95"); |
| assert_eq!(to_string(f, 0.95, Minus, 3, false), "0.950"); |
| assert_eq!(to_string(f, 0.95, Minus, 10, false), "0.9500000000"); |
| assert_eq!(to_string(f, 0.95, Minus, 30, false), "0.949999999999999955591079014994"); |
| |
| assert_eq!(to_string(f, 0.095, Minus, 0, false), "0"); |
| assert_eq!(to_string(f, 0.095, Minus, 1, false), "0.1"); |
| assert_eq!(to_string(f, 0.095, Minus, 2, false), "0.10"); |
| assert_eq!(to_string(f, 0.095, Minus, 3, false), "0.095"); |
| assert_eq!(to_string(f, 0.095, Minus, 4, false), "0.0950"); |
| assert_eq!(to_string(f, 0.095, Minus, 10, false), "0.0950000000"); |
| assert_eq!(to_string(f, 0.095, Minus, 30, false), "0.095000000000000001110223024625"); |
| |
| assert_eq!(to_string(f, 0.0095, Minus, 0, false), "0"); |
| assert_eq!(to_string(f, 0.0095, Minus, 1, false), "0.0"); |
| assert_eq!(to_string(f, 0.0095, Minus, 2, false), "0.01"); |
| assert_eq!(to_string(f, 0.0095, Minus, 3, false), "0.009"); // really is less than 0.0095 |
| assert_eq!(to_string(f, 0.0095, Minus, 4, false), "0.0095"); |
| assert_eq!(to_string(f, 0.0095, Minus, 5, false), "0.00950"); |
| assert_eq!(to_string(f, 0.0095, Minus, 10, false), "0.0095000000"); |
| assert_eq!(to_string(f, 0.0095, Minus, 30, false), "0.009499999999999999764077607267"); |
| |
| assert_eq!(to_string(f, 7.5e-11, Minus, 0, false), "0"); |
| assert_eq!(to_string(f, 7.5e-11, Minus, 3, false), "0.000"); |
| assert_eq!(to_string(f, 7.5e-11, Minus, 10, false), "0.0000000001"); |
| assert_eq!(to_string(f, 7.5e-11, Minus, 11, false), "0.00000000007"); // ditto |
| assert_eq!(to_string(f, 7.5e-11, Minus, 12, false), "0.000000000075"); |
| assert_eq!(to_string(f, 7.5e-11, Minus, 13, false), "0.0000000000750"); |
| assert_eq!(to_string(f, 7.5e-11, Minus, 20, false), "0.00000000007500000000"); |
| assert_eq!(to_string(f, 7.5e-11, Minus, 30, false), "0.000000000074999999999999999501"); |
| |
| assert_eq!(to_string(f, 1.0e25, Minus, 0, false), "10000000000000000905969664"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 1, false), "10000000000000000905969664.0"); |
| assert_eq!(to_string(f, 1.0e25, Minus, 3, false), "10000000000000000905969664.000"); |
| |
| assert_eq!(to_string(f, 1.0e-6, Minus, 0, false), "0"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 3, false), "0.000"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 6, false), "0.000001"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 9, false), "0.000001000"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 12, false), "0.000001000000"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 22, false), "0.0000010000000000000000"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 23, false), "0.00000099999999999999995"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 24, false), "0.000000999999999999999955"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 25, false), "0.0000009999999999999999547"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 35, false), "0.00000099999999999999995474811182589"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 45, false), |
| "0.000000999999999999999954748111825886258685614"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 55, false), |
| "0.0000009999999999999999547481118258862586856139387236908"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 65, false), |
| "0.00000099999999999999995474811182588625868561393872369080781936646"); |
| assert_eq!(to_string(f, 1.0e-6, Minus, 75, false), |
| "0.000000999999999999999954748111825886258685613938723690807819366455078125000"); |
| |
| assert_eq!(to_string(f, f32::MAX, Minus, 0, false), |
| "340282346638528859811704183484516925440"); |
| assert_eq!(to_string(f, f32::MAX, Minus, 1, false), |
| "340282346638528859811704183484516925440.0"); |
| assert_eq!(to_string(f, f32::MAX, Minus, 2, false), |
| "340282346638528859811704183484516925440.00"); |
| |
| let minf32 = ldexp_f32(1.0, -149); |
| assert_eq!(to_string(f, minf32, Minus, 0, false), "0"); |
| assert_eq!(to_string(f, minf32, Minus, 1, false), "0.0"); |
| assert_eq!(to_string(f, minf32, Minus, 2, false), "0.00"); |
| assert_eq!(to_string(f, minf32, Minus, 4, false), "0.0000"); |
| assert_eq!(to_string(f, minf32, Minus, 8, false), "0.00000000"); |
| assert_eq!(to_string(f, minf32, Minus, 16, false), "0.0000000000000000"); |
| assert_eq!(to_string(f, minf32, Minus, 32, false), "0.00000000000000000000000000000000"); |
| assert_eq!(to_string(f, minf32, Minus, 64, false), |
| "0.0000000000000000000000000000000000000000000014012984643248170709"); |
| assert_eq!(to_string(f, minf32, Minus, 128, false), |
| "0.0000000000000000000000000000000000000000000014012984643248170709\ |
| 2372958328991613128026194187651577175706828388979108268586060149"); |
| assert_eq!(to_string(f, minf32, Minus, 256, false), |
| "0.0000000000000000000000000000000000000000000014012984643248170709\ |
| 2372958328991613128026194187651577175706828388979108268586060148\ |
| 6638188362121582031250000000000000000000000000000000000000000000\ |
| 0000000000000000000000000000000000000000000000000000000000000000"); |
| |
| assert_eq!(to_string(f, f64::MAX, Minus, 0, false), |
| "1797693134862315708145274237317043567980705675258449965989174768\ |
| 0315726078002853876058955863276687817154045895351438246423432132\ |
| 6889464182768467546703537516986049910576551282076245490090389328\ |
| 9440758685084551339423045832369032229481658085593321233482747978\ |
| 26204144723168738177180919299881250404026184124858368"); |
| assert_eq!(to_string(f, f64::MAX, Minus, 10, false), |
| "1797693134862315708145274237317043567980705675258449965989174768\ |
| 0315726078002853876058955863276687817154045895351438246423432132\ |
| 6889464182768467546703537516986049910576551282076245490090389328\ |
| 9440758685084551339423045832369032229481658085593321233482747978\ |
| 26204144723168738177180919299881250404026184124858368.0000000000"); |
| |
| let minf64 = ldexp_f64(1.0, -1074); |
| assert_eq!(to_string(f, minf64, Minus, 0, false), "0"); |
| assert_eq!(to_string(f, minf64, Minus, 1, false), "0.0"); |
| assert_eq!(to_string(f, minf64, Minus, 10, false), "0.0000000000"); |
| assert_eq!(to_string(f, minf64, Minus, 100, false), |
| "0.0000000000000000000000000000000000000000000000000000000000000000\ |
| 000000000000000000000000000000000000"); |
| assert_eq!(to_string(f, minf64, Minus, 1000, false), |
| "0.0000000000000000000000000000000000000000000000000000000000000000\ |
| 0000000000000000000000000000000000000000000000000000000000000000\ |
| 0000000000000000000000000000000000000000000000000000000000000000\ |
| 0000000000000000000000000000000000000000000000000000000000000000\ |
| 0000000000000000000000000000000000000000000000000000000000000000\ |
| 0004940656458412465441765687928682213723650598026143247644255856\ |
| 8250067550727020875186529983636163599237979656469544571773092665\ |
| 6710355939796398774796010781878126300713190311404527845817167848\ |
| 9821036887186360569987307230500063874091535649843873124733972731\ |
| 6961514003171538539807412623856559117102665855668676818703956031\ |
| 0624931945271591492455329305456544401127480129709999541931989409\ |
| 0804165633245247571478690147267801593552386115501348035264934720\ |
| 1937902681071074917033322268447533357208324319360923828934583680\ |
| 6010601150616980975307834227731832924790498252473077637592724787\ |
| 4656084778203734469699533647017972677717585125660551199131504891\ |
| 1014510378627381672509558373897335989937"); |
| |
| // very large output |
| assert_eq!(to_string(f, 0.0, Minus, 80000, false), format!("0.{:0>80000}", "")); |
| assert_eq!(to_string(f, 1.0e1, Minus, 80000, false), format!("10.{:0>80000}", "")); |
| assert_eq!(to_string(f, 1.0e0, Minus, 80000, false), format!("1.{:0>80000}", "")); |
| assert_eq!(to_string(f, 1.0e-1, Minus, 80000, false), |
| format!("0.1000000000000000055511151231257827021181583404541015625{:0>79945}", "")); |
| assert_eq!(to_string(f, 1.0e-20, Minus, 80000, false), |
| format!("0.0000000000000000000099999999999999994515327145420957165172950370\ |
| 2787392447107715776066783064379706047475337982177734375{:0>79881}", "")); |
| } |
| |
