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use crate::{
Error,
Result,
};
#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct CompressionLevel(u8);
impl Default for CompressionLevel {
fn default() -> Self {
Self(6)
}
}
impl CompressionLevel {
pub fn new(level: u8) -> Result<CompressionLevel> {
if level < 10 {
Ok(Self(level))
} else {
Err(Error::InvalidArgument(
format!("compression level out of range: {}", level)).into())
}
}
pub fn none() -> CompressionLevel {
Self(0)
}
pub fn fastest() -> CompressionLevel {
Self(1)
}
pub fn best() -> CompressionLevel {
Self(9)
}
}
#[cfg(feature = "compression-deflate")]
mod into_deflate_compression {
use flate2::Compression;
use super::*;
impl From<CompressionLevel> for Compression {
fn from(l: CompressionLevel) -> Self {
Compression::new(l.0 as u32)
}
}
}
#[cfg(feature = "compression-bzip2")]
mod into_bzip2_compression {
use bzip2::Compression;
use super::*;
impl From<CompressionLevel> for Compression {
fn from(l: CompressionLevel) -> Self {
if l <= CompressionLevel::fastest() {
Compression::Fastest
} else if l <= CompressionLevel::default() {
Compression::Default
} else {
Compression::Best
}
}
}
}