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/*
hitomezashi-rs Generates classical colored Hitomezashi stitch patterns
Copyright (C) 2024 Nicholas Johnson
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
use clap::Parser;
use std::ops::RangeInclusive;
#[derive(Parser)]
#[command(version, about, long_about = None)] // Read from `Cargo.toml`
struct Cli {
/// Pattern width
#[arg(value_parser = dimension_in_range)]
width: usize,
/// Pattern height
#[arg(value_parser = dimension_in_range)]
height: usize,
/// Set skew
#[arg(short, long)]
#[arg(default_value_t = 0.5)]
#[arg(value_parser = skew_in_range)]
skew: f64,
}
const DIMENSION_RANGE: RangeInclusive<usize> = 1..=std::usize::MAX;
fn dimension_in_range(s: &str) -> Result<usize, String> {
let dimension: usize = s
.parse()
.map_err(|_| format!("`{s}` isn't a dimension value!"))?;
if DIMENSION_RANGE.contains(&dimension) {
Ok(dimension)
} else {
Err(format!(
"Dimension not in range {}-{}",
DIMENSION_RANGE.start(),
DIMENSION_RANGE.end()
))
}
}
const SKEW_RANGE: RangeInclusive<f64> = 0.0..=1.0;
fn skew_in_range(s: &str) -> Result<f64, String> {
let skew: f64 = s
.parse()
.map_err(|_| format!("`{s}` isn't a skew value!"))?;
if SKEW_RANGE.contains(&skew) {
Ok(skew)
} else {
Err(format!(
"Skew not in range {}-{}",
SKEW_RANGE.start(),
SKEW_RANGE.end()
))
}
}
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