Import 'ryu' crate version 1.0.5

Bug: 163175424
Test: N/A
Change-Id: I7bda5411adccb26198c53ed1cb41fc6bb08468d7
diff --git a/tests/s2f_test.rs b/tests/s2f_test.rs
new file mode 100644
index 0000000..f49824a
--- /dev/null
+++ b/tests/s2f_test.rs
@@ -0,0 +1,77 @@
+// 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.
+
+#![allow(dead_code)]
+
+#[path = "../src/common.rs"]
+mod common;
+
+#[path = "../src/d2s_full_table.rs"]
+mod d2s_full_table;
+
+#[path = "../src/d2s_intrinsics.rs"]
+mod d2s_intrinsics;
+
+#[path = "../src/d2s.rs"]
+mod d2s;
+
+#[path = "../src/f2s_intrinsics.rs"]
+mod f2s_intrinsics;
+
+#[path = "../src/f2s.rs"]
+mod f2s;
+
+#[path = "../src/s2f.rs"]
+mod s2f;
+
+#[path = "../src/parse.rs"]
+mod parse;
+
+use crate::parse::Error;
+use crate::s2f::s2f;
+
+impl PartialEq for Error {
+    fn eq(&self, other: &Self) -> bool {
+        *self as u8 == *other as u8
+    }
+}
+
+#[test]
+fn test_basic() {
+    assert_eq!(0.0, s2f(b"0").unwrap());
+    assert_eq!(-0.0, s2f(b"-0").unwrap());
+    assert_eq!(1.0, s2f(b"1").unwrap());
+    assert_eq!(-1.0, s2f(b"-1").unwrap());
+    assert_eq!(123456792.0, s2f(b"123456789").unwrap());
+    assert_eq!(299792448.0, s2f(b"299792458").unwrap());
+}
+
+#[test]
+fn test_min_max() {
+    assert_eq!(1e-45, s2f(b"1e-45").unwrap());
+    assert_eq!(f32::MIN_POSITIVE, s2f(b"1.1754944e-38").unwrap());
+    assert_eq!(f32::MAX, s2f(b"3.4028235e+38").unwrap());
+}
+
+#[test]
+fn test_mantissa_rounding_overflow() {
+    assert_eq!(1.0, s2f(b"0.999999999").unwrap());
+    assert_eq!(f32::INFINITY, s2f(b"3.4028236e+38").unwrap());
+}