diff options
Diffstat (limited to 'vendor/anstream/src/strip.rs')
| -rw-r--r-- | vendor/anstream/src/strip.rs | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/vendor/anstream/src/strip.rs b/vendor/anstream/src/strip.rs deleted file mode 100644 index d7fda04..0000000 --- a/vendor/anstream/src/strip.rs +++ /dev/null @@ -1,219 +0,0 @@ -use crate::adapter::StripBytes; -use crate::stream::AsLockedWrite; -use crate::stream::RawStream; - -/// Only pass printable data to the inner `Write` -#[derive(Debug)] -pub struct StripStream<S> -where - S: RawStream, -{ - raw: S, - state: StripBytes, -} - -impl<S> StripStream<S> -where - S: RawStream, -{ - /// Only pass printable data to the inner `Write` - #[inline] - pub fn new(raw: S) -> Self { - Self { - raw, - state: Default::default(), - } - } - - /// Get the wrapped [`RawStream`] - #[inline] - pub fn into_inner(self) -> S { - self.raw - } - - #[inline] - pub fn is_terminal(&self) -> bool { - self.raw.is_terminal() - } -} - -impl StripStream<std::io::Stdout> { - /// Get exclusive access to the `StripStream` - /// - /// Why? - /// - Faster performance when writing in a loop - /// - Avoid other threads interleaving output with the current thread - #[inline] - pub fn lock(self) -> StripStream<std::io::StdoutLock<'static>> { - StripStream { - raw: self.raw.lock(), - state: self.state, - } - } -} - -impl StripStream<std::io::Stderr> { - /// Get exclusive access to the `StripStream` - /// - /// Why? - /// - Faster performance when writing in a loop - /// - Avoid other threads interleaving output with the current thread - #[inline] - pub fn lock(self) -> StripStream<std::io::StderrLock<'static>> { - StripStream { - raw: self.raw.lock(), - state: self.state, - } - } -} - -impl<S> std::io::Write for StripStream<S> -where - S: RawStream + AsLockedWrite, -{ - // Must forward all calls to ensure locking happens appropriately - #[inline] - fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> { - write(&mut self.raw.as_locked_write(), &mut self.state, buf) - } - #[inline] - fn write_vectored(&mut self, bufs: &[std::io::IoSlice<'_>]) -> std::io::Result<usize> { - let buf = bufs - .iter() - .find(|b| !b.is_empty()) - .map(|b| &**b) - .unwrap_or(&[][..]); - self.write(buf) - } - // is_write_vectored: nightly only - #[inline] - fn flush(&mut self) -> std::io::Result<()> { - self.raw.as_locked_write().flush() - } - #[inline] - fn write_all(&mut self, buf: &[u8]) -> std::io::Result<()> { - write_all(&mut self.raw.as_locked_write(), &mut self.state, buf) - } - // write_all_vectored: nightly only - #[inline] - fn write_fmt(&mut self, args: std::fmt::Arguments<'_>) -> std::io::Result<()> { - write_fmt(&mut self.raw.as_locked_write(), &mut self.state, args) - } -} - -fn write( - raw: &mut dyn std::io::Write, - state: &mut StripBytes, - buf: &[u8], -) -> std::io::Result<usize> { - let initial_state = state.clone(); - - for printable in state.strip_next(buf) { - let possible = printable.len(); - let written = raw.write(printable)?; - if possible != written { - let divergence = &printable[written..]; - let offset = offset_to(buf, divergence); - let consumed = &buf[offset..]; - *state = initial_state; - state.strip_next(consumed).last(); - return Ok(offset); - } - } - Ok(buf.len()) -} - -fn write_all( - raw: &mut dyn std::io::Write, - state: &mut StripBytes, - buf: &[u8], -) -> std::io::Result<()> { - for printable in state.strip_next(buf) { - raw.write_all(printable)?; - } - Ok(()) -} - -fn write_fmt( - raw: &mut dyn std::io::Write, - state: &mut StripBytes, - args: std::fmt::Arguments<'_>, -) -> std::io::Result<()> { - let write_all = |buf: &[u8]| write_all(raw, state, buf); - crate::fmt::Adapter::new(write_all).write_fmt(args) -} - -#[inline] -fn offset_to(total: &[u8], subslice: &[u8]) -> usize { - let total = total.as_ptr(); - let subslice = subslice.as_ptr(); - - debug_assert!( - total <= subslice, - "`Offset::offset_to` only accepts slices of `self`" - ); - subslice as usize - total as usize -} - -#[cfg(test)] -mod test { - use super::*; - use proptest::prelude::*; - use std::io::Write as _; - - proptest! { - #[test] - #[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253 - fn write_all_no_escapes(s in "\\PC*") { - let buffer = Vec::new(); - let mut stream = StripStream::new(buffer); - stream.write_all(s.as_bytes()).unwrap(); - let buffer = stream.into_inner(); - let actual = std::str::from_utf8(buffer.as_ref()).unwrap(); - assert_eq!(s, actual); - } - - #[test] - #[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253 - fn write_byte_no_escapes(s in "\\PC*") { - let buffer = Vec::new(); - let mut stream = StripStream::new(buffer); - for byte in s.as_bytes() { - stream.write_all(&[*byte]).unwrap(); - } - let buffer = stream.into_inner(); - let actual = std::str::from_utf8(buffer.as_ref()).unwrap(); - assert_eq!(s, actual); - } - - #[test] - #[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253 - fn write_all_random(s in any::<Vec<u8>>()) { - let buffer = Vec::new(); - let mut stream = StripStream::new(buffer); - stream.write_all(s.as_slice()).unwrap(); - let buffer = stream.into_inner(); - if let Ok(actual) = std::str::from_utf8(buffer.as_ref()) { - for char in actual.chars() { - assert!(!char.is_ascii() || !char.is_control() || char.is_ascii_whitespace(), "{:?} -> {:?}: {:?}", String::from_utf8_lossy(&s), actual, char); - } - } - } - - #[test] - #[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253 - fn write_byte_random(s in any::<Vec<u8>>()) { - let buffer = Vec::new(); - let mut stream = StripStream::new(buffer); - for byte in s.as_slice() { - stream.write_all(&[*byte]).unwrap(); - } - let buffer = stream.into_inner(); - if let Ok(actual) = std::str::from_utf8(buffer.as_ref()) { - for char in actual.chars() { - assert!(!char.is_ascii() || !char.is_control() || char.is_ascii_whitespace(), "{:?} -> {:?}: {:?}", String::from_utf8_lossy(&s), actual, char); - } - } - } - } -} |