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Implement FixedPoint trait. (#5877)
* Implement Fixed trait. * Fix tests * Fix tests * Fix tests 2 * Address review comment regarding from_i129. * Remove precision by using log10() as suggested in review. * Add small comments. * Use checked versions + panic for ops::*. * Remove repeated test. * Uncomment test. * Remove casts. * Add more comments. * Add tests. * Panic on saturating_div_int * More tests. * More docs. * Saturating renames. * Fix to_bound doc. * Move some impl to trait. * Add range * Add macro pre. * More round() tests. * Delete confusion. * More impl to trait * Add doc for fixedpoint op. * Remove trailing spaces. * Suggested docs changes. * More tests and comments for roundings. * Some quickcheck tests. * Add missing panic, more test/comments. * Nits. * Rename. * Remove primitives-types import. * Apply review suggestions * Fix long lines and add some fuzz. * fix long line * Update fuzzer * Bump impl * fix warnings Co-authored-by: Gavin Wood <gavin@parity.io> Co-authored-by: Shawn Tabrizi <shawntabrizi@gmail.com>
This commit is contained in:
Marcio Diaz
-401
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|
||||
honggfuzz = "0.5.49"
|
||||
primitive-types = "0.7.0"
|
||||
num-bigint = "0.2"
|
||||
num-traits = "0.2"
|
||||
@@ -31,3 +31,7 @@ path = "src/per_thing_rational.rs"
|
||||
[[bin]]
|
||||
name = "rational128"
|
||||
path = "src/rational128.rs"
|
||||
|
||||
[[bin]]
|
||||
name = "fixed"
|
||||
path = "src/fixed.rs"
|
||||
@@ -0,0 +1,82 @@
|
||||
// This file is part of Substrate.
|
||||
|
||||
// Copyright (C) 2020 Parity Technologies (UK) Ltd.
|
||||
// SPDX-License-Identifier: Apache-2.0
|
||||
|
||||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||
// you may not use this file except in compliance with the License.
|
||||
// You may obtain a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
// See the License for the specific language governing permissions and
|
||||
// limitations under the License.
|
||||
|
||||
//! # Running
|
||||
//! Running this fuzzer can be done with `cargo hfuzz run fixed`. `honggfuzz` CLI options can
|
||||
//! be used by setting `HFUZZ_RUN_ARGS`, such as `-n 4` to use 4 threads.
|
||||
//!
|
||||
//! # Debugging a panic
|
||||
//! Once a panic is found, it can be debugged with
|
||||
//! `cargo hfuzz run-debug fixed hfuzz_workspace/fixed/*.fuzz`.
|
||||
//!
|
||||
//! # More information
|
||||
//! More information about `honggfuzz` can be found
|
||||
//! [here](https://docs.rs/honggfuzz/).
|
||||
|
||||
use honggfuzz::fuzz;
|
||||
use sp_arithmetic::{FixedPointNumber, Fixed64, traits::Saturating};
|
||||
|
||||
fn main() {
|
||||
loop {
|
||||
fuzz!(|data: (i32, i32)| {
|
||||
let x: i128 = data.0.into();
|
||||
let y: i128 = data.1.into();
|
||||
|
||||
// Check `from_rational` and division are consistent.
|
||||
if y != 0 {
|
||||
let f1 = Fixed64::saturating_from_integer(x) / Fixed64::saturating_from_integer(y);
|
||||
let f2 = Fixed64::saturating_from_rational(x, y);
|
||||
assert_eq!(f1.into_inner(), f2.into_inner());
|
||||
}
|
||||
|
||||
// Check `saturating_mul`.
|
||||
let a = Fixed64::saturating_from_rational(2, 5);
|
||||
let b = a.saturating_mul(Fixed64::saturating_from_integer(x));
|
||||
let n = b.into_inner() as i128;
|
||||
let m = 2i128 * x * Fixed64::accuracy() as i128 / 5i128;
|
||||
assert_eq!(n, m);
|
||||
|
||||
// Check `saturating_mul` and division are inverse.
|
||||
if x != 0 {
|
||||
assert_eq!(a, b / Fixed64::saturating_from_integer(x));
|
||||
}
|
||||
|
||||
// Check `reciprocal`.
|
||||
let r = a.reciprocal().unwrap().reciprocal().unwrap();
|
||||
assert_eq!(a, r);
|
||||
|
||||
// Check addition.
|
||||
let a = Fixed64::saturating_from_integer(x);
|
||||
let b = Fixed64::saturating_from_integer(y);
|
||||
let c = Fixed64::saturating_from_integer(x.saturating_add(y));
|
||||
assert_eq!(a.saturating_add(b), c);
|
||||
|
||||
// Check substraction.
|
||||
let a = Fixed64::saturating_from_integer(x);
|
||||
let b = Fixed64::saturating_from_integer(y);
|
||||
let c = Fixed64::saturating_from_integer(x.saturating_sub(y));
|
||||
assert_eq!(a.saturating_sub(b), c);
|
||||
|
||||
// Check `saturating_mul_acc_int`.
|
||||
let a = Fixed64::saturating_from_rational(2, 5);
|
||||
let b = a.saturating_mul_acc_int(x);
|
||||
let xx = Fixed64::saturating_from_integer(x);
|
||||
let d = a.saturating_mul(xx).saturating_add(xx).into_inner() as i128 / Fixed64::accuracy() as i128;
|
||||
assert_eq!(b, d);
|
||||
});
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user