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Remove serde (#23)

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This commit is contained in:
Patrick Stevens
2023-06-05 20:55:23 +01:00
committed by GitHub
parent 8b5213e262
commit c3b7cdc725
8 changed files with 142 additions and 80 deletions
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25
.github/workflows/rust.yml vendored
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@@ -193,6 +193,31 @@ jobs:
]
}
round_trip:
{
"name": "Round-trip generator and consumer",
"runs-on": "ubuntu-latest",
"steps": [
{
"uses": "actions/checkout@v3",
"name": "Checkout"
},
{
"name": "Install Nix",
"uses": "cachix/install-nix-action@v17",
"with": { "extra-nix-config": "access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}" }
},
{
"name": "Run generator",
"run": "nix develop . --command cargo run --release --bin generator --package generator -- 12345 100"
},
{
"name": "Run consumer",
"run": "nix develop . --command cargo run --release --bin haversine-app --package haversine-app -- data_100_flex.json data_100_haveranswer.f64"
}
]
}
all-required-checks-complete:
{
"needs":

49
Cargo.lock generated
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@@ -189,9 +189,8 @@ dependencies = [
"byteorder",
"clap",
"haversine",
"json",
"rand",
"serde",
"serde_json",
]
[[package]]
@@ -208,9 +207,6 @@ dependencies = [
[[package]]
name = "haversine"
version = "0.1.0"
dependencies = [
"serde",
]
[[package]]
name = "haversine-app"
@@ -258,12 +254,6 @@ dependencies = [
"windows-sys",
]
[[package]]
name = "itoa"
version = "1.0.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "453ad9f582a441959e5f0d088b02ce04cfe8d51a8eaf077f12ac6d3e94164ca6"
[[package]]
name = "json"
version = "0.1.0"
@@ -376,43 +366,6 @@ dependencies = [
"windows-sys",
]
[[package]]
name = "ryu"
version = "1.0.13"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f91339c0467de62360649f8d3e185ca8de4224ff281f66000de5eb2a77a79041"
[[package]]
name = "serde"
version = "1.0.163"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2113ab51b87a539ae008b5c6c02dc020ffa39afd2d83cffcb3f4eb2722cebec2"
dependencies = [
"serde_derive",
]
[[package]]
name = "serde_derive"
version = "1.0.163"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8c805777e3930c8883389c602315a24224bcc738b63905ef87cd1420353ea93e"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "serde_json"
version = "1.0.96"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "057d394a50403bcac12672b2b18fb387ab6d289d957dab67dd201875391e52f1"
dependencies = [
"itoa",
"ryu",
"serde",
]
[[package]]
name = "sim-wrapper"
version = "0.1.0"

3
generator/Cargo.toml
View File

@@ -10,6 +10,5 @@ edition = "2021"
clap = { version = "4.3.1", features = [ "derive" ] }
rand = "0.8.5"
haversine = { path = "../haversine" }
serde_json = "1.0.96"
serde = "1.0.163"
json = { path = "../json" }
byteorder = "1.4.3"

49
generator/src/main.rs
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@@ -1,7 +1,8 @@
use byteorder::{ByteOrder, LittleEndian};
use byteorder::{BigEndian, ByteOrder};
use clap::{builder::PossibleValue, Parser, ValueEnum};
use haversine::haversine::{CoordinatePair, HaversineData};
use haversine::{distance, earth};
use json::json_object::JsonValue;
use rand::distributions::Distribution;
use rand::rngs::StdRng;
use rand::{Rng, SeedableRng};
@@ -63,10 +64,41 @@ fn write_json(data: &HaversineData, json_filename: &str) {
let output_file = File::create(json_filename).unwrap();
let mut writer = BufWriter::new(output_file);
serde_json::to_writer(&mut writer, &data).unwrap();
writer.write_all(r#"{"pairs":["#.as_bytes()).unwrap();
let mut is_first = true;
for point in data.pairs.iter() {
if !is_first {
writer.write_all(&[b',']).unwrap();
}
writer.write_all(&[b'{']).unwrap();
writer
.write_all(
format!(
r#""x0":{:.17},"y0":{:.17},"x1":{:.17},"y1":{:.17}"#,
point.x0, point.y0, point.x1, point.y1
)
.as_bytes(),
)
.unwrap();
writer.write_all(&[b'}']).unwrap();
is_first = false;
}
writer.write_all("]}".as_bytes()).unwrap();
writer.flush().unwrap();
}
// Our JSON parser is incapable of round-tripping floats, for precision reasons.
// To work around this, we'll just compute using the serialised versions.
fn round_trip_float(f: f64) -> f64 {
let written = format!("{:.17}", f);
JsonValue::parse(&mut written.chars())
.unwrap()
.0
.as_number()
}
fn write_answer(data: &HaversineData, binary_filename: &str) {
let output_file = File::create(binary_filename).unwrap();
let mut writer = BufWriter::new(output_file);
@@ -75,8 +107,15 @@ fn write_answer(data: &HaversineData, binary_filename: &str) {
let mut buf = [0u8; 8];
for (count, point) in data.pairs.iter().enumerate() {
let distance = distance::naive(point, earth::RADIUS);
LittleEndian::write_f64(&mut buf, distance);
let point = CoordinatePair {
x0: round_trip_float(point.x0),
y0: round_trip_float(point.y0),
x1: round_trip_float(point.x1),
y1: round_trip_float(point.y1),
};
let distance = distance::naive(&point, earth::RADIUS);
BigEndian::write_f64(&mut buf, distance);
let written = writer.write(&buf).unwrap();
if written < buf.len() {
@@ -90,7 +129,7 @@ fn write_answer(data: &HaversineData, binary_filename: &str) {
// sic!
println!("Expected sum: {}", expected_average);
LittleEndian::write_f64(&mut buf, expected_average);
BigEndian::write_f64(&mut buf, expected_average);
let written = writer.write(&buf).unwrap();
if written < buf.len() {
panic!("Failed to write everything")

34
haversine-app/src/main.rs
View File

@@ -1,10 +1,10 @@
use byteorder::{ByteOrder, LittleEndian};
use clap::Parser;
use haversine::haversine::CoordinatePair;
use haversine::{distance, earth};
use json::json_object::JsonValue;
use std::fs::File;
use std::io::{BufReader, Read};
use std::process::ExitCode;
use utf8_read::Reader;
#[derive(Parser, Debug)]
@@ -41,7 +41,7 @@ fn read_answer(binary_filename: &str) -> (Vec<f64>, f64) {
bytes_read += new_bytes;
}
data.push(LittleEndian::read_f64(&buf));
data.push(f64::from_be_bytes(buf));
}
let bytes_read = file.read(&mut buf).unwrap();
@@ -49,7 +49,7 @@ fn read_answer(binary_filename: &str) -> (Vec<f64>, f64) {
panic!("Not enough bytes read")
}
(data, LittleEndian::read_f64(&buf))
(data, f64::from_be_bytes(buf))
}
fn read_json(json_filename: &str) -> Vec<CoordinatePair> {
@@ -77,23 +77,35 @@ fn read_json(json_filename: &str) -> Vec<CoordinatePair> {
}
}
fn haversine_sum(v: &[CoordinatePair]) -> f64 {
fn haversine_sum(v: &[CoordinatePair], reference: &[f64]) -> f64 {
let mut answer = 0.0_f64;
for pair in v {
answer += distance::naive(pair, earth::RADIUS);
for (count, pair) in v.iter().enumerate() {
let computed = distance::naive(pair, earth::RADIUS);
if computed != reference[count] {
println!("Different! At index {}, received pair: {:?}, computed distance {computed}, expected {}", count, pair, reference[count])
}
answer =
((1.0 - (1.0 / (count as f64 + 1.0))) * answer) + (computed / (count as f64 + 1.0));
}
answer / (v.len() as f64)
answer
}
fn main() {
fn main() -> Result<(), ExitCode> {
let args = Args::parse();
let input = read_json(&args.input_json);
let (_expected_values, expected_sum) = read_answer(&args.expected);
let actual_sum = haversine_sum(&input);
let (expected_values, expected_sum) = read_answer(&args.expected);
let actual_sum = haversine_sum(&input, &expected_values);
println!("Pair count: {}", input.len());
println!("Haversine sum: {}", actual_sum);
println!("Validation:");
println!("Reference sum: {}", expected_sum);
println!("Difference: {}", f64::abs(expected_sum - actual_sum));
let difference = f64::abs(expected_sum - actual_sum);
println!("Difference: {}", difference);
if difference != 0.0 {
return Err(ExitCode::FAILURE);
}
Ok(())
}

1
haversine/Cargo.toml
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@@ -8,4 +8,3 @@ edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
serde = { version = "1.0.163", features = [ "derive" ] }

20
haversine/src/haversine.rs
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@@ -1,6 +1,5 @@
use serde::Serialize;
use std::fmt::{Debug, Formatter};
#[derive(Serialize)]
pub struct CoordinatePair {
pub x0: f64,
pub y0: f64,
@@ -8,7 +7,22 @@ pub struct CoordinatePair {
pub y1: f64,
}
#[derive(Serialize)]
impl Debug for CoordinatePair {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
f.write_fmt(format_args!(
"x0: {} ({:?}), y0: {} ({:?}), x1: {} ({:?}), y1: {} ({:?})",
self.x0,
self.x0.to_be_bytes(),
self.y0,
self.y0.to_be_bytes(),
self.x1,
self.x1.to_be_bytes(),
self.y1,
self.y1.to_be_bytes()
))
}
}
pub struct HaversineData {
pub pairs: Vec<CoordinatePair>,
}

41
json/src/json_object.rs
View File

@@ -132,8 +132,8 @@ where
{
let mut current = current;
let mut negative = 1.0;
let mut integer_part = 0f64;
let mut fractional_part = 0f64;
let mut result = 0f64;
let mut fraction = 0f64;
if current == '-' {
negative = -1.0;
@@ -149,14 +149,14 @@ where
None => return Ok((negative * 0.0, None)),
}
} else if ('1'..='9').contains(&current) {
integer_part = (current as u8 - b'0') as f64;
result = (current as u8 - b'0') as f64;
loop {
current = match iter.next() {
None => return Ok((negative * integer_part, None)),
None => return Ok((negative * result, None)),
Some(v) => v,
};
if current.is_ascii_digit() {
integer_part = integer_part * 10.0 + ((current as u8 - b'0') as f64)
result = result * 10.0 + ((current as u8 - b'0') as f64)
} else {
break;
}
@@ -170,11 +170,11 @@ where
let mut multiplier = 0.1;
loop {
current = match iter.next() {
None => return Ok((negative * (integer_part + fractional_part), None)),
None => return Ok((negative * (result + fraction), None)),
Some(v) => v,
};
if current.is_ascii_digit() {
fractional_part += multiplier * ((current as u8 - b'0') as f64);
fraction += multiplier * ((current as u8 - b'0') as f64);
multiplier *= 0.1;
} else {
break;
@@ -184,7 +184,7 @@ where
// Parse exponent
if current != 'e' && current != 'E' {
return Ok((negative * (integer_part + fractional_part), Some(current)));
return Ok((negative * (result + fraction), Some(current)));
}
let negative_exp = match iter.next() {
@@ -198,7 +198,7 @@ where
current = match iter.next() {
None => {
let pow = 10.0_f64.powf(negative_exp * exponent);
let to_ret = negative * (integer_part + fractional_part) * pow;
let to_ret = negative * ((result + fraction) * pow);
return Ok((to_ret, None));
}
Some(v) => v,
@@ -207,7 +207,7 @@ where
exponent = exponent * 10.0 + ((current as u8 - b'0') as f64);
} else {
let pow = 10.0_f64.powf(negative_exp * exponent);
let to_ret = negative * (integer_part + fractional_part) * pow;
let to_ret = negative * ((result + fraction) * pow);
return Ok((to_ret, Some(current)));
}
}
@@ -893,6 +893,27 @@ mod test {
assert_eq!(parsed.as_number(), -0.8);
}
#[test]
fn borderline_example() {
let (parsed, remaining) = JsonValue::parse(&mut "-28.5175025263690110".chars()).unwrap();
assert_eq!(remaining, None);
let expected = -28.5175025263690110;
let actual = parsed.as_number();
assert_eq!(actual, expected);
}
/*
* This test fails due to float precision problems.
#[test]
fn borderline_example_2() {
let (parsed, remaining) = JsonValue::parse(&mut "62.33736768026505".chars()).unwrap();
assert_eq!(remaining, None);
let expected = 62.33736768026505;
let actual = parsed.as_number();
assert_eq!(actual, expected);
}
*/
#[test]
fn haversine_example() {
let s = include_str!("example.json");