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|
||||
checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
|
||||
|
||||
[[package]]
|
||||
name = "xattr"
|
||||
version = "1.5.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0d65cbf2f12c15564212d48f4e3dfb87923d25d611f2aed18f4cb23f0413d89e"
|
||||
dependencies = [
|
||||
"libc",
|
||||
"rustix",
|
||||
]
|
||||
|
|
@ -4,3 +4,5 @@ version = "0.1.0"
|
|||
edition = "2021"
|
||||
|
||||
[dependencies]
|
||||
image = { version = "0.25.6", default-features = false, features = ["png"] }
|
||||
proj = { version = "0.30.0", default-features = false }
|
||||
|
|
|
|||
|
|
@ -0,0 +1,4 @@
|
|||
mod parser;
|
||||
mod rv;
|
||||
|
||||
pub use rv::Rv;
|
||||
|
|
@ -0,0 +1,92 @@
|
|||
use std::io::{Error as IoError, Read, Seek};
|
||||
use std::num::ParseIntError;
|
||||
use std::slice;
|
||||
use std::str::{self, FromStr, Utf8Error};
|
||||
|
||||
#[allow(dead_code)]
|
||||
#[derive(Debug)]
|
||||
pub enum ParseError {
|
||||
IoError(IoError),
|
||||
ParseIntError(ParseIntError),
|
||||
Unexpected(String, &'static str),
|
||||
Utf8Error(Utf8Error),
|
||||
}
|
||||
|
||||
pub struct Parser<R: Read + Seek> {
|
||||
r: R,
|
||||
}
|
||||
|
||||
impl<R: Read + Seek> Parser<R> {
|
||||
pub fn new(r: R) -> Self {
|
||||
Self { r }
|
||||
}
|
||||
|
||||
pub fn take(&mut self, length: usize) -> Result<String, ParseError> {
|
||||
let mut buf = vec![0; length];
|
||||
|
||||
self.r
|
||||
.read_exact(&mut buf)
|
||||
.map_err(|err| ParseError::IoError(err))?;
|
||||
|
||||
Ok(String::from_utf8(buf).map_err(|err| ParseError::Utf8Error(err.utf8_error()))?)
|
||||
}
|
||||
|
||||
pub fn peek(&mut self, pos: i64, length: usize) -> Result<String, ParseError> {
|
||||
if pos != 0 {
|
||||
self.r
|
||||
.seek_relative(pos)
|
||||
.map_err(|err| ParseError::IoError(err))?;
|
||||
}
|
||||
|
||||
let string = self.take(length)?;
|
||||
|
||||
self.r
|
||||
.seek_relative(-(length as i64) - pos)
|
||||
.map_err(|err| ParseError::IoError(err))?;
|
||||
|
||||
Ok(string)
|
||||
}
|
||||
|
||||
pub fn expect(&mut self, expected: &'static str) -> Result<(), ParseError> {
|
||||
let actual = self.take(expected.len())?;
|
||||
|
||||
if actual == expected {
|
||||
Ok(())
|
||||
} else {
|
||||
Err(ParseError::Unexpected(actual, expected))
|
||||
}
|
||||
}
|
||||
|
||||
pub fn parse_int<I, const N: usize>(&mut self) -> Result<I, ParseError>
|
||||
where
|
||||
I: FromStr<Err = ParseIntError>,
|
||||
{
|
||||
let mut buf = [0u8; N];
|
||||
|
||||
self.r
|
||||
.read_exact(&mut buf)
|
||||
.map_err(|err| ParseError::IoError(err))?;
|
||||
|
||||
I::from_str(
|
||||
str::from_utf8(&buf)
|
||||
.map_err(|err| ParseError::Utf8Error(err))?
|
||||
.trim_ascii_start(),
|
||||
)
|
||||
.map_err(|err| ParseError::ParseIntError(err))
|
||||
}
|
||||
|
||||
pub fn consume<T, const N: usize>(mut self) -> Result<Vec<T>, ParseError>
|
||||
where
|
||||
T: Clone + Default,
|
||||
{
|
||||
let mut data = vec![T::default(); N];
|
||||
|
||||
let buf =
|
||||
unsafe { slice::from_raw_parts_mut(data.as_mut_ptr() as *mut _, N * size_of::<T>()) };
|
||||
self.r
|
||||
.read_exact(buf)
|
||||
.map_err(|err| ParseError::IoError(err))?;
|
||||
|
||||
Ok(data)
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,132 @@
|
|||
#[cfg(not(target_endian = "little"))]
|
||||
compile_error!("Only little-endian architectures are supported.");
|
||||
|
||||
use crate::data::parser::{ParseError, Parser};
|
||||
|
||||
use std::io::{Read, Seek};
|
||||
|
||||
const DATA_LEN: usize = 1100 * 1200;
|
||||
|
||||
#[derive(Clone, Copy, Debug)]
|
||||
pub struct VersionMismatch {
|
||||
pub actual: u8,
|
||||
pub expected: u8,
|
||||
}
|
||||
|
||||
#[derive(Clone, Copy, Debug)]
|
||||
pub struct Datetime {
|
||||
pub year: u16,
|
||||
pub month: u8,
|
||||
pub day: u8,
|
||||
pub hour: u8,
|
||||
pub minute: u8,
|
||||
}
|
||||
|
||||
#[derive(Debug)]
|
||||
pub struct Rv {
|
||||
timestamp: Datetime,
|
||||
version: u8,
|
||||
precision: i8,
|
||||
forecast: u16,
|
||||
data: Vec<u16>,
|
||||
}
|
||||
|
||||
impl Rv {
|
||||
pub fn parse<R: Read + Seek>(r: R) -> Result<Self, ParseError> {
|
||||
let mut parser = Parser::new(r);
|
||||
|
||||
parser.expect("RV")?;
|
||||
|
||||
let day = parser.parse_int::<_, 2>()?;
|
||||
let hour = parser.parse_int::<_, 2>()?;
|
||||
let minute = parser.parse_int::<_, 2>()?;
|
||||
|
||||
let _wmo = parser.parse_int::<u32, 5>()?;
|
||||
|
||||
let month = parser.parse_int::<_, 2>()?;
|
||||
let year = 2000 + parser.parse_int::<u16, 2>()?;
|
||||
|
||||
parser.expect("BY")?;
|
||||
|
||||
let _len = if parser.peek(7, 2)? == "VS" {
|
||||
parser.parse_int::<usize, 7>()?
|
||||
} else {
|
||||
parser.parse_int::<usize, 10>()?
|
||||
};
|
||||
|
||||
parser.expect("VS")?;
|
||||
|
||||
let version = parser.parse_int::<_, 2>()?;
|
||||
|
||||
parser.expect("SW ")?;
|
||||
|
||||
let _sw_version = parser.take(8)?;
|
||||
|
||||
parser.expect("PR E")?;
|
||||
|
||||
let precision = parser.parse_int::<_, 3>()?;
|
||||
|
||||
parser.expect("INT")?;
|
||||
|
||||
let _interval = parser.parse_int::<u16, 4>()?;
|
||||
|
||||
parser.expect("GP")?;
|
||||
|
||||
let _resolution = parser.take(9)?;
|
||||
|
||||
parser.expect("VV ")?;
|
||||
|
||||
let forecast = parser.parse_int::<_, 3>()?;
|
||||
|
||||
parser.expect("MF ")?;
|
||||
|
||||
let _flags = parser.parse_int::<u32, 8>()?;
|
||||
|
||||
parser.expect("MS")?;
|
||||
|
||||
let text_len = parser.parse_int::<_, 3>()?;
|
||||
|
||||
let _text = parser.take(text_len)?;
|
||||
|
||||
parser.expect("\x03")?;
|
||||
|
||||
let data = parser.consume::<_, DATA_LEN>()?;
|
||||
|
||||
Ok(Self {
|
||||
timestamp: Datetime {
|
||||
year,
|
||||
month,
|
||||
day,
|
||||
hour,
|
||||
minute,
|
||||
},
|
||||
version,
|
||||
precision,
|
||||
forecast,
|
||||
data,
|
||||
})
|
||||
}
|
||||
|
||||
pub fn expect_version(&self, version: u8) -> Result<(), VersionMismatch> {
|
||||
if self.version == version {
|
||||
Ok(())
|
||||
} else {
|
||||
Err(VersionMismatch {
|
||||
actual: self.version,
|
||||
expected: version,
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
pub fn scale(&self) -> f64 {
|
||||
10_f64.powi(self.precision as i32)
|
||||
}
|
||||
|
||||
pub fn instant(&self) -> (Datetime, u16) {
|
||||
(self.timestamp, self.forecast)
|
||||
}
|
||||
|
||||
pub fn data(&self) -> &[u16] {
|
||||
&self.data[..]
|
||||
}
|
||||
}
|
||||
64
src/main.rs
64
src/main.rs
|
|
@ -1,3 +1,63 @@
|
|||
fn main() {
|
||||
println!("Hello, world!");
|
||||
mod data;
|
||||
|
||||
use data::Rv;
|
||||
|
||||
use image::imageops;
|
||||
use image::RgbaImage;
|
||||
|
||||
use proj::Proj;
|
||||
|
||||
use std::fs::File;
|
||||
use std::io::BufReader;
|
||||
|
||||
const PROJ_WGS84_DE1200: &'static str = "+proj=stere +lat_0=90 +lat_ts=60 +lon_0=10 +a=6378137 +b=6356752.3142451802 +no_defs +x_0=543196.83521776402 +y_0=3622588.8619310018";
|
||||
|
||||
#[repr(u32)]
|
||||
enum Intensity {
|
||||
None = 0xffffff00,
|
||||
Light = 0x80d0d080,
|
||||
Moderate = 0x50a0e080,
|
||||
Heavy = 0x1030f080,
|
||||
Unknown = 0xd0d0d080,
|
||||
}
|
||||
|
||||
fn main() {
|
||||
let rv = Rv::parse(BufReader::new(File::open("input").unwrap())).unwrap();
|
||||
rv.expect_version(5).unwrap();
|
||||
|
||||
let mut data = Vec::with_capacity(1100 * 1200 * 4);
|
||||
|
||||
for v in rv.data() {
|
||||
let intensity = if *v == 0x29c4 {
|
||||
Intensity::Unknown
|
||||
} else {
|
||||
let mm_per_h = *v as f64 * rv.scale() * 12.0; // 12 * 5 min intervals per hour
|
||||
if mm_per_h < 0.1 {
|
||||
Intensity::None
|
||||
} else if mm_per_h < 5.0 {
|
||||
Intensity::Light
|
||||
} else if mm_per_h < 15.0 {
|
||||
Intensity::Moderate
|
||||
} else {
|
||||
Intensity::Heavy
|
||||
}
|
||||
};
|
||||
|
||||
data.extend_from_slice(&(intensity as u32).to_be_bytes());
|
||||
}
|
||||
|
||||
let mut img = RgbaImage::from_raw(1100, 1200, data).unwrap();
|
||||
imageops::flip_vertical_in_place(&mut img);
|
||||
img.save("rv.png").unwrap();
|
||||
|
||||
let wgs84_to_de1200 = Proj::new(PROJ_WGS84_DE1200).unwrap();
|
||||
println!(
|
||||
"{:#?}",
|
||||
wgs84_to_de1200
|
||||
.project(
|
||||
(1.463301510_f64.to_radians(), 55.86208711_f64.to_radians()),
|
||||
false
|
||||
)
|
||||
.unwrap()
|
||||
);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue