android/vendor/anstream-0.5.0/src/adapter/strip.rs - toolchain/cargo-deny - Git at Google

 use anstyle_parse::state::state_change;
 use anstyle_parse::state::Action;
 use anstyle_parse::state::State;

 /// Strip ANSI escapes from a `&str`, returning the printable content
 ///
 /// This can be used to take output from a program that includes escape sequences and write it
 /// somewhere that does not easily support them, such as a log file.
 ///
 /// For non-contiguous data, see [`StripStr`].
 ///
 /// # Example
 ///
 /// ```rust
 /// use std::io::Write as _;
 ///
 /// let styled_text = "\x1b[32mfoo\x1b[m bar";
 /// let plain_str = anstream::adapter::strip_str(&styled_text).to_string();
 /// assert_eq!(plain_str, "foo bar");
 /// ```
 #[inline]
 pub fn strip_str(data: &str) -> StrippedStr<'_> {
     StrippedStr::new(data)
 }

 /// See [`strip_str`]
 #[derive(Default, Clone, Debug, PartialEq, Eq)]
 pub struct StrippedStr<'s> {
     bytes: &'s [u8],
     state: State,
 }

 impl<'s> StrippedStr<'s> {
     #[inline]
     fn new(data: &'s str) -> Self {
         Self {
             bytes: data.as_bytes(),
             state: State::Ground,
         }
     }

     /// Create a [`String`] of the printable content
     #[inline]
     #[allow(clippy::inherent_to_string_shadow_display)] // Single-allocation implementation
     pub fn to_string(&self) -> String {
         use std::fmt::Write as _;
         let mut stripped = String::with_capacity(self.bytes.len());
         let _ = write!(&mut stripped, "{}", self);
         stripped
     }
 }

 impl<'s> std::fmt::Display for StrippedStr<'s> {
     /// **Note:** this does *not* exhaust the [`Iterator`]
     #[inline]
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         let iter = Self {
             bytes: self.bytes,
             state: self.state,
         };
         for printable in iter {
             printable.fmt(f)?;
         }
         Ok(())
     }
 }

 impl<'s> Iterator for StrippedStr<'s> {
     type Item = &'s str;

     #[inline]
     fn next(&mut self) -> Option<Self::Item> {
         next_str(&mut self.bytes, &mut self.state)
     }
 }

 /// Incrementally strip non-contiguous data
 #[derive(Default, Clone, Debug, PartialEq, Eq)]
 pub struct StripStr {
     state: State,
 }

 impl StripStr {
     /// Initial state
     pub fn new() -> Self {
         Default::default()
     }

     /// Strip the next segment of data
     pub fn strip_next<'s>(&'s mut self, data: &'s str) -> StripStrIter<'s> {
         StripStrIter {
             bytes: data.as_bytes(),
             state: &mut self.state,
         }
     }
 }

 /// See [`StripStr`]
 #[derive(Debug, PartialEq, Eq)]
 pub struct StripStrIter<'s> {
     bytes: &'s [u8],
     state: &'s mut State,
 }

 impl<'s> Iterator for StripStrIter<'s> {
     type Item = &'s str;

     #[inline]
     fn next(&mut self) -> Option<Self::Item> {
         next_str(&mut self.bytes, self.state)
     }
 }

 #[inline]
 fn next_str<'s>(bytes: &mut &'s [u8], state: &mut State) -> Option<&'s str> {
     let offset = bytes.iter().copied().position(|b| {
         let (next_state, action) = state_change(*state, b);
         if next_state != State::Anywhere {
             *state = next_state;
         }
         is_printable_str(action, b)
     });
     let (_, next) = bytes.split_at(offset.unwrap_or(bytes.len()));
     *bytes = next;
     *state = State::Ground;

     let offset = bytes.iter().copied().position(|b| {
         let (_next_state, action) = state_change(State::Ground, b);
         !is_printable_str(action, b)
     });
     let (printable, next) = bytes.split_at(offset.unwrap_or(bytes.len()));
     *bytes = next;
     if printable.is_empty() {
         None
     } else {
         let printable = unsafe {
             from_utf8_unchecked(
                 printable,
                 "`bytes` was validated as UTF-8, the parser preserves UTF-8 continuations",
             )
         };
         Some(printable)
     }
 }

 #[inline]
 unsafe fn from_utf8_unchecked<'b>(bytes: &'b [u8], safety_justification: &'static str) -> &'b str {
     if cfg!(debug_assertions) {
         // Catch problems more quickly when testing
         std::str::from_utf8(bytes).expect(safety_justification)
     } else {
         std::str::from_utf8_unchecked(bytes)
     }
 }

 #[inline]
 fn is_printable_str(action: Action, byte: u8) -> bool {
     // VT320 considered 0x7f to be `Print`able but we expect to be working in UTF-8 systems and not
     // ISO Latin-1, making it DEL and non-printable
     const DEL: u8 = 0x7f;
     (action == Action::Print && byte != DEL)
         || action == Action::BeginUtf8
         // since we know the input is valid UTF-8, the only thing  we can do with
         // continuations is to print them
         || is_utf8_continuation(byte)
         || (action == Action::Execute && byte.is_ascii_whitespace())
 }

 #[inline]
 fn is_utf8_continuation(b: u8) -> bool {
     matches!(b, 0x80..=0xbf)
 }

 /// Strip ANSI escapes from bytes, returning the printable content
 ///
 /// This can be used to take output from a program that includes escape sequences and write it
 /// somewhere that does not easily support them, such as a log file.
 ///
 /// # Example
 ///
 /// ```rust
 /// use std::io::Write as _;
 ///
 /// let styled_text = "\x1b[32mfoo\x1b[m bar";
 /// let plain_str = anstream::adapter::strip_bytes(styled_text.as_bytes()).into_vec();
 /// assert_eq!(plain_str.as_slice(), &b"foo bar"[..]);
 /// ```
 #[inline]
 pub fn strip_bytes(data: &[u8]) -> StrippedBytes<'_> {
     StrippedBytes::new(data)
 }

 /// See [`strip_bytes`]
 #[derive(Default, Clone, Debug, PartialEq, Eq)]
 pub struct StrippedBytes<'s> {
     bytes: &'s [u8],
     state: State,
     utf8parser: Utf8Parser,
 }

 impl<'s> StrippedBytes<'s> {
     /// See [`strip_bytes`]
     #[inline]
     pub fn new(bytes: &'s [u8]) -> Self {
         Self {
             bytes,
             state: State::Ground,
             utf8parser: Default::default(),
         }
     }

     /// Strip the next slice of bytes
     ///
     /// Used when the content is in several non-contiguous slices
     ///
     /// # Panic
     ///
     /// May panic if it is not exhausted / empty
     #[inline]
     pub fn extend(&mut self, bytes: &'s [u8]) {
         debug_assert!(
             self.is_empty(),
             "current bytes must be processed to ensure we end at the right state"
         );
         self.bytes = bytes;
     }

     /// Report the bytes has been exhausted
     #[inline]
     pub fn is_empty(&self) -> bool {
         self.bytes.is_empty()
     }

     /// Create a [`Vec`] of the printable content
     #[inline]
     pub fn into_vec(self) -> Vec<u8> {
         let mut stripped = Vec::with_capacity(self.bytes.len());
         for printable in self {
             stripped.extend(printable);
         }
         stripped
     }
 }

 impl<'s> Iterator for StrippedBytes<'s> {
     type Item = &'s [u8];

     #[inline]
     fn next(&mut self) -> Option<Self::Item> {
         next_bytes(&mut self.bytes, &mut self.state, &mut self.utf8parser)
     }
 }

 /// Incrementally strip non-contiguous data
 #[derive(Default, Clone, Debug, PartialEq, Eq)]
 pub struct StripBytes {
     state: State,
     utf8parser: Utf8Parser,
 }

 impl StripBytes {
     /// Initial state
     pub fn new() -> Self {
         Default::default()
     }

     /// Strip the next segment of data
     pub fn strip_next<'s>(&'s mut self, bytes: &'s [u8]) -> StripBytesIter<'s> {
         StripBytesIter {
             bytes,
             state: &mut self.state,
             utf8parser: &mut self.utf8parser,
         }
     }
 }

 /// See [`StripBytes`]
 #[derive(Debug, PartialEq, Eq)]
 pub struct StripBytesIter<'s> {
     bytes: &'s [u8],
     state: &'s mut State,
     utf8parser: &'s mut Utf8Parser,
 }

 impl<'s> Iterator for StripBytesIter<'s> {
     type Item = &'s [u8];

     #[inline]
     fn next(&mut self) -> Option<Self::Item> {
         next_bytes(&mut self.bytes, self.state, self.utf8parser)
     }
 }

 #[inline]
 fn next_bytes<'s>(
     bytes: &mut &'s [u8],
     state: &mut State,
     utf8parser: &mut Utf8Parser,
 ) -> Option<&'s [u8]> {
     let offset = bytes.iter().copied().position(|b| {
         if *state == State::Utf8 {
             true
         } else {
             let (next_state, action) = state_change(*state, b);
             if next_state != State::Anywhere {
                 *state = next_state;
             }
             is_printable_bytes(action, b)
         }
     });
     let (_, next) = bytes.split_at(offset.unwrap_or(bytes.len()));
     *bytes = next;

     let offset = bytes.iter().copied().position(|b| {
         if *state == State::Utf8 {
             if utf8parser.add(b) {
                 *state = State::Ground;
             }
             false
         } else {
             let (next_state, action) = state_change(State::Ground, b);
             if next_state != State::Anywhere {
                 *state = next_state;
             }
             if *state == State::Utf8 {
                 utf8parser.add(b);
                 false
             } else {
                 !is_printable_bytes(action, b)
             }
         }
     });
     let (printable, next) = bytes.split_at(offset.unwrap_or(bytes.len()));
     *bytes = next;
     if printable.is_empty() {
         None
     } else {
         Some(printable)
     }
 }

 #[derive(Default, Clone, Debug, PartialEq, Eq)]
 pub struct Utf8Parser {
     utf8_parser: utf8parse::Parser,
 }

 impl Utf8Parser {
     fn add(&mut self, byte: u8) -> bool {
         let mut b = false;
         let mut receiver = VtUtf8Receiver(&mut b);
         self.utf8_parser.advance(&mut receiver, byte);
         b
     }
 }

 struct VtUtf8Receiver<'a>(&'a mut bool);

 impl<'a> utf8parse::Receiver for VtUtf8Receiver<'a> {
     fn codepoint(&mut self, _: char) {
         *self.0 = true;
     }

     fn invalid_sequence(&mut self) {
         *self.0 = true;
     }
 }

 #[inline]
 fn is_printable_bytes(action: Action, byte: u8) -> bool {
     // VT320 considered 0x7f to be `Print`able but we expect to be working in UTF-8 systems and not
     // ISO Latin-1, making it DEL and non-printable
     const DEL: u8 = 0x7f;

     // Continuations aren't included as they may also be control codes, requiring more context
     (action == Action::Print && byte != DEL)
         || action == Action::BeginUtf8
         || (action == Action::Execute && byte.is_ascii_whitespace())
 }

 #[cfg(test)]
 mod test {
     use super::*;
     use proptest::prelude::*;

     /// Model based off full parser
     fn parser_strip(bytes: &[u8]) -> String {
         #[derive(Default)]
         struct Strip(String);
         impl Strip {
             fn with_capacity(capacity: usize) -> Self {
                 Self(String::with_capacity(capacity))
             }
         }
         impl anstyle_parse::Perform for Strip {
             fn print(&mut self, c: char) {
                 self.0.push(c);
             }

             fn execute(&mut self, byte: u8) {
                 if byte.is_ascii_whitespace() {
                     self.0.push(byte as char);
                 }
             }
         }

         let mut stripped = Strip::with_capacity(bytes.len());
         let mut parser = anstyle_parse::Parser::<anstyle_parse::DefaultCharAccumulator>::new();
         for byte in bytes {
             parser.advance(&mut stripped, *byte);
         }
         stripped.0
     }

     /// Model verifying incremental parsing
     fn strip_char(mut s: &str) -> String {
         let mut result = String::new();
         let mut state = StripStr::new();
         while !s.is_empty() {
             let mut indices = s.char_indices();
             indices.next(); // current
             let offset = indices.next().map(|(i, _)| i).unwrap_or_else(|| s.len());
             let (current, remainder) = s.split_at(offset);
             for printable in state.strip_next(current) {
                 result.push_str(printable);
             }
             s = remainder;
         }
         result
     }

     /// Model verifying incremental parsing
     fn strip_byte(s: &[u8]) -> Vec<u8> {
         let mut result = Vec::new();
         let mut state = StripBytes::default();
         for start in 0..s.len() {
             let current = &s[start..=start];
             for printable in state.strip_next(current) {
                 result.extend(printable);
             }
         }
         result
     }

     #[test]
     fn test_strip_bytes_multibyte() {
         let bytes = [240, 145, 141, 139];
         let expected = parser_strip(&bytes);
         let actual = String::from_utf8(strip_bytes(&bytes).into_vec()).unwrap();
         assert_eq!(expected, actual);
     }

     #[test]
     fn test_strip_byte_multibyte() {
         let bytes = [240, 145, 141, 139];
         let expected = parser_strip(&bytes);
         let actual = String::from_utf8(strip_byte(&bytes).to_vec()).unwrap();
         assert_eq!(expected, actual);
     }

     #[test]
     fn test_strip_str_del() {
         let input = std::str::from_utf8(&[0x7f]).unwrap();
         let expected = "";
         let actual = strip_str(input).to_string();
         assert_eq!(expected, actual);
     }

     #[test]
     fn test_strip_byte_del() {
         let bytes = [0x7f];
         let expected = "";
         let actual = String::from_utf8(strip_byte(&bytes).to_vec()).unwrap();
         assert_eq!(expected, actual);
     }

     proptest! {
         #[test]
         #[cfg_attr(miri, ignore)]  // See https://github.com/AltSysrq/proptest/issues/253
         fn strip_str_no_escapes(s in "\\PC*") {
             let expected = parser_strip(s.as_bytes());
             let actual = strip_str(&s).to_string();
             assert_eq!(expected, actual);
         }

         #[test]
         #[cfg_attr(miri, ignore)]  // See https://github.com/AltSysrq/proptest/issues/253
         fn strip_char_no_escapes(s in "\\PC*") {
             let expected = parser_strip(s.as_bytes());
             let actual = strip_char(&s);
             assert_eq!(expected, actual);
         }

         #[test]
         #[cfg_attr(miri, ignore)]  // See https://github.com/AltSysrq/proptest/issues/253
         fn strip_bytes_no_escapes(s in "\\PC*") {
             dbg!(&s);
             dbg!(s.as_bytes());
             let expected = parser_strip(s.as_bytes());
             let actual = String::from_utf8(strip_bytes(s.as_bytes()).into_vec()).unwrap();
             assert_eq!(expected, actual);
         }

         #[test]
         #[cfg_attr(miri, ignore)]  // See https://github.com/AltSysrq/proptest/issues/253
         fn strip_byte_no_escapes(s in "\\PC*") {
             dbg!(&s);
             dbg!(s.as_bytes());
             let expected = parser_strip(s.as_bytes());
             let actual = String::from_utf8(strip_byte(s.as_bytes()).to_vec()).unwrap();
             assert_eq!(expected, actual);
         }
     }
 }
	use anstyle_parse::state::state_change;
	use anstyle_parse::state::Action;
	use anstyle_parse::state::State;

	/// Strip ANSI escapes from a `&str`, returning the printable content
	///
	/// This can be used to take output from a program that includes escape sequences and write it
	/// somewhere that does not easily support them, such as a log file.
	///
	/// For non-contiguous data, see [`StripStr`].
	///
	/// # Example
	///
	/// ```rust
	/// use std::io::Write as _;
	///
	/// let styled_text = "\x1b[32mfoo\x1b[m bar";
	/// let plain_str = anstream::adapter::strip_str(&styled_text).to_string();
	/// assert_eq!(plain_str, "foo bar");
	/// ```
	#[inline]
	pub fn strip_str(data: &str) -> StrippedStr<'_> {
	StrippedStr::new(data)
	}

	/// See [`strip_str`]
	#[derive(Default, Clone, Debug, PartialEq, Eq)]
	pub struct StrippedStr<'s> {
	bytes: &'s [u8],
	state: State,
	}

	impl<'s> StrippedStr<'s> {
	#[inline]
	fn new(data: &'s str) -> Self {
	Self {
	bytes: data.as_bytes(),
	state: State::Ground,
	}
	}

	/// Create a [`String`] of the printable content
	#[inline]
	#[allow(clippy::inherent_to_string_shadow_display)] // Single-allocation implementation
	pub fn to_string(&self) -> String {
	use std::fmt::Write as _;
	let mut stripped = String::with_capacity(self.bytes.len());
	let _ = write!(&mut stripped, "{}", self);
	stripped
	}
	}

	impl<'s> std::fmt::Display for StrippedStr<'s> {
	/// Note: this does not exhaust the [`Iterator`]
	#[inline]
	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
	let iter = Self {
	bytes: self.bytes,
	state: self.state,
	};
	for printable in iter {
	printable.fmt(f)?;
	}
	Ok(())
	}
	}

	impl<'s> Iterator for StrippedStr<'s> {
	type Item = &'s str;

	#[inline]
	fn next(&mut self) -> Option<Self::Item> {
	next_str(&mut self.bytes, &mut self.state)
	}
	}

	/// Incrementally strip non-contiguous data
	#[derive(Default, Clone, Debug, PartialEq, Eq)]
	pub struct StripStr {
	state: State,
	}

	impl StripStr {
	/// Initial state
	pub fn new() -> Self {
	Default::default()
	}

	/// Strip the next segment of data
	pub fn strip_next<'s>(&'s mut self, data: &'s str) -> StripStrIter<'s> {
	StripStrIter {
	bytes: data.as_bytes(),
	state: &mut self.state,
	}
	}
	}

	/// See [`StripStr`]
	#[derive(Debug, PartialEq, Eq)]
	pub struct StripStrIter<'s> {
	bytes: &'s [u8],
	state: &'s mut State,
	}

	impl<'s> Iterator for StripStrIter<'s> {
	type Item = &'s str;

	#[inline]
	fn next(&mut self) -> Option<Self::Item> {
	next_str(&mut self.bytes, self.state)
	}
	}

	#[inline]
	fn next_str<'s>(bytes: &mut &'s [u8], state: &mut State) -> Option<&'s str> {
	let offset = bytes.iter().copied().position(\|b\| {
	let (next_state, action) = state_change(*state, b);
	if next_state != State::Anywhere {
	*state = next_state;
	}
	is_printable_str(action, b)
	});
	let (_, next) = bytes.split_at(offset.unwrap_or(bytes.len()));
	*bytes = next;
	*state = State::Ground;

	let offset = bytes.iter().copied().position(\|b\| {
	let (_next_state, action) = state_change(State::Ground, b);
	!is_printable_str(action, b)
	});
	let (printable, next) = bytes.split_at(offset.unwrap_or(bytes.len()));
	*bytes = next;
	if printable.is_empty() {
	None
	} else {
	let printable = unsafe {
	from_utf8_unchecked(
	printable,
	"`bytes` was validated as UTF-8, the parser preserves UTF-8 continuations",
	)
	};
	Some(printable)
	}
	}

	#[inline]
	unsafe fn from_utf8_unchecked<'b>(bytes: &'b [u8], safety_justification: &'static str) -> &'b str {
	if cfg!(debug_assertions) {
	// Catch problems more quickly when testing
	std::str::from_utf8(bytes).expect(safety_justification)
	} else {
	std::str::from_utf8_unchecked(bytes)
	}
	}

	#[inline]
	fn is_printable_str(action: Action, byte: u8) -> bool {
	// VT320 considered 0x7f to be `Print`able but we expect to be working in UTF-8 systems and not
	// ISO Latin-1, making it DEL and non-printable
	const DEL: u8 = 0x7f;
	(action == Action::Print && byte != DEL)
	\|\| action == Action::BeginUtf8
	// since we know the input is valid UTF-8, the only thing we can do with
	// continuations is to print them
	\|\| is_utf8_continuation(byte)
	\|\| (action == Action::Execute && byte.is_ascii_whitespace())
	}

	#[inline]
	fn is_utf8_continuation(b: u8) -> bool {
	matches!(b, 0x80..=0xbf)
	}

	/// Strip ANSI escapes from bytes, returning the printable content
	///
	/// This can be used to take output from a program that includes escape sequences and write it
	/// somewhere that does not easily support them, such as a log file.
	///
	/// # Example
	///
	/// ```rust
	/// use std::io::Write as _;
	///
	/// let styled_text = "\x1b[32mfoo\x1b[m bar";
	/// let plain_str = anstream::adapter::strip_bytes(styled_text.as_bytes()).into_vec();
	/// assert_eq!(plain_str.as_slice(), &b"foo bar"[..]);
	/// ```
	#[inline]
	pub fn strip_bytes(data: &[u8]) -> StrippedBytes<'_> {
	StrippedBytes::new(data)
	}

	/// See [`strip_bytes`]
	#[derive(Default, Clone, Debug, PartialEq, Eq)]
	pub struct StrippedBytes<'s> {
	bytes: &'s [u8],
	state: State,
	utf8parser: Utf8Parser,
	}

	impl<'s> StrippedBytes<'s> {
	/// See [`strip_bytes`]
	#[inline]
	pub fn new(bytes: &'s [u8]) -> Self {
	Self {
	bytes,
	state: State::Ground,
	utf8parser: Default::default(),
	}
	}

	/// Strip the next slice of bytes
	///
	/// Used when the content is in several non-contiguous slices
	///
	/// # Panic
	///
	/// May panic if it is not exhausted / empty
	#[inline]
	pub fn extend(&mut self, bytes: &'s [u8]) {
	debug_assert!(
	self.is_empty(),
	"current bytes must be processed to ensure we end at the right state"
	);
	self.bytes = bytes;
	}

	/// Report the bytes has been exhausted
	#[inline]
	pub fn is_empty(&self) -> bool {
	self.bytes.is_empty()
	}

	/// Create a [`Vec`] of the printable content
	#[inline]
	pub fn into_vec(self) -> Vec<u8> {
	let mut stripped = Vec::with_capacity(self.bytes.len());
	for printable in self {
	stripped.extend(printable);
	}
	stripped
	}
	}

	impl<'s> Iterator for StrippedBytes<'s> {
	type Item = &'s [u8];

	#[inline]
	fn next(&mut self) -> Option<Self::Item> {
	next_bytes(&mut self.bytes, &mut self.state, &mut self.utf8parser)
	}
	}

	/// Incrementally strip non-contiguous data
	#[derive(Default, Clone, Debug, PartialEq, Eq)]
	pub struct StripBytes {
	state: State,
	utf8parser: Utf8Parser,
	}

	impl StripBytes {
	/// Initial state
	pub fn new() -> Self {
	Default::default()
	}

	/// Strip the next segment of data
	pub fn strip_next<'s>(&'s mut self, bytes: &'s [u8]) -> StripBytesIter<'s> {
	StripBytesIter {
	bytes,
	state: &mut self.state,
	utf8parser: &mut self.utf8parser,
	}
	}
	}

	/// See [`StripBytes`]
	#[derive(Debug, PartialEq, Eq)]
	pub struct StripBytesIter<'s> {
	bytes: &'s [u8],
	state: &'s mut State,
	utf8parser: &'s mut Utf8Parser,
	}

	impl<'s> Iterator for StripBytesIter<'s> {
	type Item = &'s [u8];

	#[inline]
	fn next(&mut self) -> Option<Self::Item> {
	next_bytes(&mut self.bytes, self.state, self.utf8parser)
	}
	}

	#[inline]
	fn next_bytes<'s>(
	bytes: &mut &'s [u8],
	state: &mut State,
	utf8parser: &mut Utf8Parser,
	) -> Option<&'s [u8]> {
	let offset = bytes.iter().copied().position(\|b\| {
	if *state == State::Utf8 {
	true
	} else {
	let (next_state, action) = state_change(*state, b);
	if next_state != State::Anywhere {
	*state = next_state;
	}
	is_printable_bytes(action, b)
	}
	});
	let (_, next) = bytes.split_at(offset.unwrap_or(bytes.len()));
	*bytes = next;

	let offset = bytes.iter().copied().position(\|b\| {
	if *state == State::Utf8 {
	if utf8parser.add(b) {
	*state = State::Ground;
	}
	false
	} else {
	let (next_state, action) = state_change(State::Ground, b);
	if next_state != State::Anywhere {
	*state = next_state;
	}
	if *state == State::Utf8 {
	utf8parser.add(b);
	false
	} else {
	!is_printable_bytes(action, b)
	}
	}
	});
	let (printable, next) = bytes.split_at(offset.unwrap_or(bytes.len()));
	*bytes = next;
	if printable.is_empty() {
	None
	} else {
	Some(printable)
	}
	}

	#[derive(Default, Clone, Debug, PartialEq, Eq)]
	pub struct Utf8Parser {
	utf8_parser: utf8parse::Parser,
	}

	impl Utf8Parser {
	fn add(&mut self, byte: u8) -> bool {
	let mut b = false;
	let mut receiver = VtUtf8Receiver(&mut b);
	self.utf8_parser.advance(&mut receiver, byte);
	b
	}
	}

	struct VtUtf8Receiver<'a>(&'a mut bool);

	impl<'a> utf8parse::Receiver for VtUtf8Receiver<'a> {
	fn codepoint(&mut self, _: char) {
	*self.0 = true;
	}

	fn invalid_sequence(&mut self) {
	*self.0 = true;
	}
	}

	#[inline]
	fn is_printable_bytes(action: Action, byte: u8) -> bool {
	// VT320 considered 0x7f to be `Print`able but we expect to be working in UTF-8 systems and not
	// ISO Latin-1, making it DEL and non-printable
	const DEL: u8 = 0x7f;

	// Continuations aren't included as they may also be control codes, requiring more context
	(action == Action::Print && byte != DEL)
	\|\| action == Action::BeginUtf8
	\|\| (action == Action::Execute && byte.is_ascii_whitespace())
	}

	#[cfg(test)]
	mod test {
	use super::*;
	use proptest::prelude::*;

	/// Model based off full parser
	fn parser_strip(bytes: &[u8]) -> String {
	#[derive(Default)]
	struct Strip(String);
	impl Strip {
	fn with_capacity(capacity: usize) -> Self {
	Self(String::with_capacity(capacity))
	}
	}
	impl anstyle_parse::Perform for Strip {
	fn print(&mut self, c: char) {
	self.0.push(c);
	}

	fn execute(&mut self, byte: u8) {
	if byte.is_ascii_whitespace() {
	self.0.push(byte as char);
	}
	}
	}

	let mut stripped = Strip::with_capacity(bytes.len());
	let mut parser = anstyle_parse::Parser::<anstyle_parse::DefaultCharAccumulator>::new();
	for byte in bytes {
	parser.advance(&mut stripped, *byte);
	}
	stripped.0
	}

	/// Model verifying incremental parsing
	fn strip_char(mut s: &str) -> String {
	let mut result = String::new();
	let mut state = StripStr::new();
	while !s.is_empty() {
	let mut indices = s.char_indices();
	indices.next(); // current
	let offset = indices.next().map(\|(i, _)\| i).unwrap_or_else(\|\| s.len());
	let (current, remainder) = s.split_at(offset);
	for printable in state.strip_next(current) {
	result.push_str(printable);
	}
	s = remainder;
	}
	result
	}

	/// Model verifying incremental parsing
	fn strip_byte(s: &[u8]) -> Vec<u8> {
	let mut result = Vec::new();
	let mut state = StripBytes::default();
	for start in 0..s.len() {
	let current = &s[start..=start];
	for printable in state.strip_next(current) {
	result.extend(printable);
	}
	}
	result
	}

	#[test]
	fn test_strip_bytes_multibyte() {
	let bytes = [240, 145, 141, 139];
	let expected = parser_strip(&bytes);
	let actual = String::from_utf8(strip_bytes(&bytes).into_vec()).unwrap();
	assert_eq!(expected, actual);
	}

	#[test]
	fn test_strip_byte_multibyte() {
	let bytes = [240, 145, 141, 139];
	let expected = parser_strip(&bytes);
	let actual = String::from_utf8(strip_byte(&bytes).to_vec()).unwrap();
	assert_eq!(expected, actual);
	}

	#[test]
	fn test_strip_str_del() {
	let input = std::str::from_utf8(&[0x7f]).unwrap();
	let expected = "";
	let actual = strip_str(input).to_string();
	assert_eq!(expected, actual);
	}

	#[test]
	fn test_strip_byte_del() {
	let bytes = [0x7f];
	let expected = "";
	let actual = String::from_utf8(strip_byte(&bytes).to_vec()).unwrap();
	assert_eq!(expected, actual);
	}

	proptest! {
	#[test]
	#[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253
	fn strip_str_no_escapes(s in "\\PC*") {
	let expected = parser_strip(s.as_bytes());
	let actual = strip_str(&s).to_string();
	assert_eq!(expected, actual);
	}

	#[test]
	#[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253
	fn strip_char_no_escapes(s in "\\PC*") {
	let expected = parser_strip(s.as_bytes());
	let actual = strip_char(&s);
	assert_eq!(expected, actual);
	}

	#[test]
	#[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253
	fn strip_bytes_no_escapes(s in "\\PC*") {
	dbg!(&s);
	dbg!(s.as_bytes());
	let expected = parser_strip(s.as_bytes());
	let actual = String::from_utf8(strip_bytes(s.as_bytes()).into_vec()).unwrap();
	assert_eq!(expected, actual);
	}

	#[test]
	#[cfg_attr(miri, ignore)] // See https://github.com/AltSysrq/proptest/issues/253
	fn strip_byte_no_escapes(s in "\\PC*") {
	dbg!(&s);
	dbg!(s.as_bytes());
	let expected = parser_strip(s.as_bytes());
	let actual = String::from_utf8(strip_byte(s.as_bytes()).to_vec()).unwrap();
	assert_eq!(expected, actual);
	}
	}
	}