1 files changed, 167 insertions, 0 deletions
diff --git a/third_party/rust/ryu/tests/s2d_test.rs b/third_party/rust/ryu/tests/s2d_test.rs
new file mode 100644
index 0000000000..7b42164007
--- /dev/null
+++ b/third_party/rust/ryu/tests/s2d_test.rs
@@ -0,0 +1,167 @@
+// Translated from C to Rust. The original C code can be found at
+// https://github.com/ulfjack/ryu and carries the following license:
+//
+// Copyright 2018 Ulf Adams
+//
+// The contents of this file may be used under the terms of the Apache License,
+// Version 2.0.
+//
+//    (See accompanying file LICENSE-Apache or copy at
+//     http://www.apache.org/licenses/LICENSE-2.0)
+//
+// Alternatively, the contents of this file may be used under the terms of
+// the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE-Boost or copy at
+//     https://www.boost.org/LICENSE_1_0.txt)
+//
+// Unless required by applicable law or agreed to in writing, this software
+// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.
+
+#![cfg(not(feature = "small"))]
+#![allow(dead_code)]
+#![allow(
+    clippy::cast_lossless,
+    clippy::cast_possible_truncation,
+    clippy::cast_possible_wrap,
+    clippy::cast_sign_loss,
+    clippy::excessive_precision,
+    clippy::float_cmp,
+    clippy::manual_range_contains,
+    clippy::similar_names,
+    clippy::too_many_lines,
+    clippy::unreadable_literal,
+    clippy::unseparated_literal_suffix,
+    clippy::wildcard_imports
+)]
+
+#[path = "../src/common.rs"]
+mod common;
+
+#[cfg(not(feature = "small"))]
+#[path = "../src/d2s_full_table.rs"]
+mod d2s_full_table;
+
+#[path = "../src/d2s_intrinsics.rs"]
+mod d2s_intrinsics;
+
+#[cfg(feature = "small")]
+#[path = "../src/d2s_small_table.rs"]
+mod d2s_small_table;
+
+#[path = "../src/d2s.rs"]
+mod d2s;
+
+#[path = "../src/s2d.rs"]
+mod s2d;
+
+#[path = "../src/parse.rs"]
+mod parse;
+
+use crate::parse::Error;
+use crate::s2d::s2d;
+
+impl PartialEq for Error {
+    fn eq(&self, other: &Self) -> bool {
+        *self as u8 == *other as u8
+    }
+}
+
+#[test]
+fn test_bad_input() {
+    assert_eq!(Error::MalformedInput, s2d(b"x").unwrap_err());
+    assert_eq!(Error::MalformedInput, s2d(b"1..1").unwrap_err());
+    assert_eq!(Error::MalformedInput, s2d(b"..").unwrap_err());
+    assert_eq!(Error::MalformedInput, s2d(b"1..1").unwrap_err());
+    assert_eq!(Error::MalformedInput, s2d(b"1ee1").unwrap_err());
+    assert_eq!(Error::MalformedInput, s2d(b"1e.1").unwrap_err());
+    assert_eq!(Error::InputTooShort, s2d(b"").unwrap_err());
+    assert_eq!(Error::InputTooLong, s2d(b"123456789012345678").unwrap_err());
+    assert_eq!(Error::InputTooLong, s2d(b"1e12345").unwrap_err());
+}
+
+#[test]
+fn test_basic() {
+    assert_eq!(0.0, s2d(b"0").unwrap());
+    assert_eq!(-0.0, s2d(b"-0").unwrap());
+    assert_eq!(1.0, s2d(b"1").unwrap());
+    assert_eq!(2.0, s2d(b"2").unwrap());
+    assert_eq!(123456789.0, s2d(b"123456789").unwrap());
+    assert_eq!(123.456, s2d(b"123.456").unwrap());
+    assert_eq!(123.456, s2d(b"123456e-3").unwrap());
+    assert_eq!(123.456, s2d(b"1234.56e-1").unwrap());
+    assert_eq!(1.453, s2d(b"1.453").unwrap());
+    assert_eq!(1453.0, s2d(b"1.453e+3").unwrap());
+    assert_eq!(0.0, s2d(b".0").unwrap());
+    assert_eq!(1.0, s2d(b"1e0").unwrap());
+    assert_eq!(1.0, s2d(b"1E0").unwrap());
+    assert_eq!(1.0, s2d(b"000001.000000").unwrap());
+    assert_eq!(0.2316419, s2d(b"0.2316419").unwrap());
+}
+
+#[test]
+fn test_min_max() {
+    assert_eq!(
+        1.7976931348623157e308,
+        s2d(b"1.7976931348623157e308").unwrap(),
+    );
+    assert_eq!(5E-324, s2d(b"5E-324").unwrap());
+}
+
+#[test]
+fn test_mantissa_rounding_overflow() {
+    // This results in binary mantissa that is all ones and requires rounding up
+    // because it is closer to 1 than to the next smaller float. This is a
+    // regression test that the mantissa overflow is handled correctly by
+    // increasing the exponent.
+    assert_eq!(1.0, s2d(b"0.99999999999999999").unwrap());
+    // This number overflows the mantissa *and* the IEEE exponent.
+    assert_eq!(f64::INFINITY, s2d(b"1.7976931348623159e308").unwrap());
+}
+
+#[test]
+fn test_underflow() {
+    assert_eq!(0.0, s2d(b"2.4e-324").unwrap());
+    assert_eq!(0.0, s2d(b"1e-324").unwrap());
+    assert_eq!(0.0, s2d(b"9.99999e-325").unwrap());
+    // These are just about halfway between 0 and the smallest float.
+    // The first is just below the halfway point, the second just above.
+    assert_eq!(0.0, s2d(b"2.4703282292062327e-324").unwrap());
+    assert_eq!(5e-324, s2d(b"2.4703282292062328e-324").unwrap());
+}
+
+#[test]
+fn test_overflow() {
+    assert_eq!(f64::INFINITY, s2d(b"2e308").unwrap());
+    assert_eq!(f64::INFINITY, s2d(b"1e309").unwrap());
+}
+
+#[test]
+fn test_table_size_denormal() {
+    assert_eq!(5e-324, s2d(b"4.9406564584124654e-324").unwrap());
+}
+
+#[test]
+fn test_issue157() {
+    assert_eq!(
+        1.2999999999999999E+154,
+        s2d(b"1.2999999999999999E+154").unwrap(),
+    );
+}
+
+#[test]
+fn test_issue173() {
+    // Denormal boundary
+    assert_eq!(
+        2.2250738585072012e-308,
+        s2d(b"2.2250738585072012e-308").unwrap(),
+    );
+    assert_eq!(
+        2.2250738585072013e-308,
+        s2d(b"2.2250738585072013e-308").unwrap(),
+    );
+    assert_eq!(
+        2.2250738585072014e-308,
+        s2d(b"2.2250738585072014e-308").unwrap(),
+    );
+}