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use std::{io, sync::Mutex};
use crate::fmt::{WritableTarget, WriteStyle};
pub(in crate::fmt::writer) mod glob {}
pub(in crate::fmt::writer) struct BufferWriter {
target: WritableTarget,
}
pub(in crate::fmt) struct Buffer(Vec<u8>);
impl BufferWriter {
pub(in crate::fmt::writer) fn stderr(_is_test: bool, _write_style: WriteStyle) -> Self {
BufferWriter {
target: WritableTarget::Stderr,
}
}
pub(in crate::fmt::writer) fn stdout(_is_test: bool, _write_style: WriteStyle) -> Self {
BufferWriter {
target: WritableTarget::Stdout,
}
}
pub(in crate::fmt::writer) fn pipe(
_write_style: WriteStyle,
pipe: Box<Mutex<dyn io::Write + Send + 'static>>,
) -> Self {
BufferWriter {
target: WritableTarget::Pipe(pipe),
}
}
pub(in crate::fmt::writer) fn buffer(&self) -> Buffer {
Buffer(Vec::new())
}
pub(in crate::fmt::writer) fn print(&self, buf: &Buffer) -> io::Result<()> {
// This impl uses the `eprint` and `print` macros
// instead of using the streams directly.
// This is so their output can be captured by `cargo test`.
match &self.target {
// Safety: If the target type is `Pipe`, `target_pipe` will always be non-empty.
WritableTarget::Pipe(pipe) => pipe.lock().unwrap().write_all(&buf.0)?,
WritableTarget::Stdout => print!("{}", String::from_utf8_lossy(&buf.0)),
WritableTarget::Stderr => eprint!("{}", String::from_utf8_lossy(&buf.0)),
}
Ok(())
}
}
impl Buffer {
pub(in crate::fmt) fn clear(&mut self) {
self.0.clear();
}
pub(in crate::fmt) fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
self.0.extend(buf);
Ok(buf.len())
}
pub(in crate::fmt) fn flush(&mut self) -> io::Result<()> {
Ok(())
}
#[cfg(test)]
pub(in crate::fmt) fn bytes(&self) -> &[u8] {
&self.0
}
}
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