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use std::io::{BufRead as _, Read as _};
macro_rules! data {
() => {{
use anyhow::Context as _;
let file = crate::util::parse::src_file_to_data_file(&std::file!());
std::fs::File::open(file.clone())
.with_context(|| format!("couldn't find data file {}", file))
}};
}
macro_rules! data_lines {
() => {
data!().map(|fh| crate::util::parse::lines(fh))
};
}
macro_rules! data_ints {
() => {
data!().map(|fh| crate::util::parse::ints_by_line(fh))
};
($sep:expr) => {
data!().map(|fh| crate::util::parse::ints_by_split(fh, $sep))
};
}
macro_rules! data_bytes {
() => {
data!().map(|fh| crate::util::parse::bytes(fh))
};
}
macro_rules! data_str {
() => {{
data!().map(|fh| crate::util::parse::string(fh))
}};
}
macro_rules! data_bool_grid {
($t:expr, $f:expr) => {{
crate::util::parse::bool_grid(data_lines!().unwrap(), $t, $f)
}};
}
macro_rules! data_digit_grid {
() => {{
crate::util::parse::digit_grid(data_lines!().unwrap())
}};
}
pub fn src_file_to_data_file(file: &str) -> String {
let parts: Vec<_> = file.split('/').collect();
format!(
"data/{}/{}.txt",
parts[parts.len() - 3],
parts[parts.len() - 2]
)
}
pub fn lines(fh: std::fs::File) -> impl Iterator<Item = String> {
let fh = std::io::BufReader::new(fh);
fh.lines().map(|res| res.unwrap())
}
pub fn ints_by_line(fh: std::fs::File) -> impl Iterator<Item = i64> {
lines(fh).map(|l| l.parse().unwrap())
}
pub fn ints_by_split(
fh: std::fs::File,
sep: u8,
) -> impl Iterator<Item = i64> {
let fh = std::io::BufReader::new(fh);
fh.split(sep).filter_map(|res| {
let res = res.unwrap();
let s = std::str::from_utf8(&res).unwrap().trim();
if s.is_empty() {
None
} else {
Some(s.parse().unwrap())
}
})
}
pub fn bytes(fh: std::fs::File) -> impl Iterator<Item = u8> {
fh.bytes().map(|res| res.unwrap())
}
pub fn string(fh: std::fs::File) -> String {
let bytes: Vec<_> = bytes(fh).collect();
std::string::String::from_utf8(bytes).unwrap()
}
pub fn bool_grid(
lines: impl Iterator<Item = String>,
t: u8,
f: u8,
) -> crate::util::grid::Grid<bool> {
lines
.map(|s| {
s.as_bytes()
.iter()
.copied()
.map(|b| {
if b == f {
false
} else if b == t {
true
} else {
panic!("unrecognized character {}", char::from(b))
}
})
.collect::<Vec<_>>()
})
.collect()
}
pub fn digit_grid(
lines: impl Iterator<Item = String>,
) -> crate::util::grid::Grid<u8> {
lines
.map(|s| {
s.as_bytes()
.iter()
.copied()
.map(|b| b - b'0')
.collect::<Vec<_>>()
})
.collect()
}
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