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https://github.com/uutils/coreutils
synced 2024-12-13 14:52:41 +00:00
tr: A [:lower:]/[:upper:] in set2 must be matched in set1
If there is a [:lower:] or [:upper:] in set2, then there must be a [:lower:] or [:upper:] at the same logical position in set1 So tr -t [:upper:] [:lower:] works tr -t 1[:upper:] [:lower:] doesnt
This commit is contained in:
Christian von Elm
parent
4534f359f2
commit
7e8aaa8ad4
2 changed files with 141 additions and 97 deletions
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@ -34,6 +34,7 @@ pub enum BadSequence {
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InvalidRepeatCount(String),
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EmptySet2WhenNotTruncatingSet1,
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ClassExceptLowerUpperInSet2,
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ClassInSet2NotMatchedBySet1,
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}
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impl Display for BadSequence {
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@ -58,6 +59,9 @@ impl Display for BadSequence {
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Self::ClassExceptLowerUpperInSet2 => {
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write!(f, "when translating, the only character classes that may appear in set2 are 'upper' and 'lower'")
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}
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Self::ClassInSet2NotMatchedBySet1 => {
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write!(f, "when translating, every 'upper'/'lower' in set2 must be matched by a 'upper'/'lower' in the same position in set1")
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}
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}
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}
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}
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@ -91,18 +95,22 @@ pub enum Sequence {
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}
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impl Sequence {
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pub fn flatten(&self) -> Box<dyn Iterator<Item = u8>> {
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pub fn flatten_non_lower_upper(&self) -> Box<dyn Iterator<Item = Self>> {
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match self {
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Self::Char(c) => Box::new(std::iter::once(*c)),
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Self::CharRange(l, r) => Box::new(*l..=*r),
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Self::CharStar(c) => Box::new(std::iter::repeat(*c)),
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Self::CharRepeat(c, n) => Box::new(std::iter::repeat(*c).take(*n)),
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Self::Char(c) => Box::new(std::iter::once(*c).map(Self::Char)),
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Self::CharRange(l, r) => Box::new((*l..=*r).map(Self::Char)),
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Self::CharRepeat(c, n) => Box::new(std::iter::repeat(*c).take(*n).map(Self::Char)),
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Self::Class(class) => match class {
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Class::Alnum => Box::new((b'0'..=b'9').chain(b'A'..=b'Z').chain(b'a'..=b'z')),
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Class::Alpha => Box::new((b'A'..=b'Z').chain(b'a'..=b'z')),
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Class::Blank => Box::new(unicode_table::BLANK.iter().cloned()),
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Class::Control => Box::new((0..=31).chain(std::iter::once(127))),
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Class::Digit => Box::new(b'0'..=b'9'),
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Class::Alnum => Box::new(
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(b'0'..=b'9')
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.chain(b'A'..=b'Z')
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.chain(b'a'..=b'z')
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.map(Self::Char),
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),
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Class::Alpha => Box::new((b'A'..=b'Z').chain(b'a'..=b'z').map(Self::Char)),
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Class::Blank => Box::new(unicode_table::BLANK.iter().cloned().map(Self::Char)),
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Class::Control => Box::new((0..=31).chain(std::iter::once(127)).map(Self::Char)),
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Class::Digit => Box::new((b'0'..=b'9').map(Self::Char)),
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Class::Graph => Box::new(
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(48..=57) // digit
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.chain(65..=90) // uppercase
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@ -112,9 +120,9 @@ impl Sequence {
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.chain(58..=64)
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.chain(91..=96)
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.chain(123..=126)
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.chain(std::iter::once(32)), // space
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.chain(std::iter::once(32))
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.map(Self::Char), // space
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),
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Class::Lower => Box::new(b'a'..=b'z'),
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Class::Print => Box::new(
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(48..=57) // digit
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.chain(65..=90) // uppercase
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@ -123,13 +131,37 @@ impl Sequence {
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.chain(33..=47)
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.chain(58..=64)
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.chain(91..=96)
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.chain(123..=126),
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.chain(123..=126)
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.map(Self::Char),
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),
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Class::Punct => Box::new((33..=47).chain(58..=64).chain(91..=96).chain(123..=126)),
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Class::Space => Box::new(unicode_table::SPACES.iter().cloned()),
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Class::Upper => Box::new(b'A'..=b'Z'),
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Class::Xdigit => Box::new((b'0'..=b'9').chain(b'A'..=b'F').chain(b'a'..=b'f')),
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Class::Punct => Box::new(
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(33..=47)
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.chain(58..=64)
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.chain(91..=96)
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.chain(123..=126)
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.map(Self::Char),
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),
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Class::Space => Box::new(unicode_table::SPACES.iter().cloned().map(Self::Char)),
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Class::Xdigit => Box::new(
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(b'0'..=b'9')
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.chain(b'A'..=b'F')
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.chain(b'a'..=b'f')
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.map(Self::Char),
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),
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s => Box::new(std::iter::once(Self::Class(*s))),
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},
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s => Box::new(std::iter::once(*s)),
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}
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}
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pub fn flatten_all(&self) -> Box<dyn Iterator<Item = Self>> {
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match self {
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Self::Class(class) => match class {
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Class::Lower => Box::new((b'a'..=b'z').map(Self::Char)),
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Class::Upper => Box::new((b'A'..=b'Z').map(Self::Char)),
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s => Self::Class(*s).flatten_non_lower_upper(),
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},
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s => s.flatten_non_lower_upper(),
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}
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}
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@ -141,90 +173,97 @@ impl Sequence {
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truncate_set1_flag: bool,
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translating: bool,
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) -> Result<(Vec<u8>, Vec<u8>), BadSequence> {
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let set1 = Self::from_str(set1_str)?;
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let is_char_star = |s: &&Self| -> bool { matches!(s, Self::CharStar(_)) };
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let set1_star_count = set1.iter().filter(is_char_star).count();
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if set1_star_count == 0 {
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let set2 = Self::from_str(set2_str)?;
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if translating
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&& set2.iter().any(|&x| {
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matches!(x, Self::Class(_))
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&& !matches!(x, Self::Class(Class::Upper) | Self::Class(Class::Lower))
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})
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{
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return Err(BadSequence::ClassExceptLowerUpperInSet2);
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let to_u8 = |s: Self| -> Option<u8> {
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match s {
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Self::Char(c) => Some(c),
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_ => None,
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}
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};
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let set2_star_count = set2.iter().filter(is_char_star).count();
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if set2_star_count < 2 {
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let char_star = set2.iter().find_map(|s| match s {
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Self::CharStar(c) => Some(c),
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_ => None,
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});
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let mut partition = set2.as_slice().split(|s| matches!(s, Self::CharStar(_)));
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let set1_len = set1.iter().flat_map(Self::flatten).count();
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let set2_len = set2
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.iter()
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.filter_map(|s| match s {
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Self::CharStar(_) => None,
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r => Some(r),
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})
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.flat_map(Self::flatten)
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.count();
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let star_compensate_len = set1_len.saturating_sub(set2_len);
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let (left, right) = (partition.next(), partition.next());
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let set2_solved: Vec<_> = match (left, right) {
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(None, None) => match char_star {
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Some(c) => std::iter::repeat(*c).take(star_compensate_len).collect(),
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None => std::iter::empty().collect(),
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},
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(None, Some(set2_b)) => {
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if let Some(c) = char_star {
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std::iter::repeat(*c)
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.take(star_compensate_len)
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.chain(set2_b.iter().flat_map(Self::flatten))
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.collect()
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} else {
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set2_b.iter().flat_map(Self::flatten).collect()
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}
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}
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(Some(set2_a), None) => match char_star {
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Some(c) => set2_a
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.iter()
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.flat_map(Self::flatten)
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.chain(std::iter::repeat(*c).take(star_compensate_len))
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.collect(),
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None => set2_a.iter().flat_map(Self::flatten).collect(),
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},
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(Some(set2_a), Some(set2_b)) => match char_star {
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Some(c) => set2_a
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.iter()
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.flat_map(Self::flatten)
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.chain(std::iter::repeat(*c).take(star_compensate_len))
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.chain(set2_b.iter().flat_map(Self::flatten))
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.collect(),
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None => set2_a
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.iter()
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.chain(set2_b.iter())
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.flat_map(Self::flatten)
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.collect(),
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},
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};
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let mut set1_solved: Vec<_> = set1.iter().flat_map(Self::flatten).collect();
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if complement_flag {
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set1_solved = (0..=u8::MAX).filter(|x| !set1_solved.contains(x)).collect();
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}
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if truncate_set1_flag {
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set1_solved.truncate(set2_solved.len());
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}
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Ok((set1_solved, set2_solved))
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} else {
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Err(BadSequence::MultipleCharRepeatInSet2)
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}
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} else {
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Err(BadSequence::CharRepeatInSet1)
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let set1 = Self::from_str(set1_str)?;
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if set1.iter().filter(is_char_star).count() != 0 {
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return Err(BadSequence::CharRepeatInSet1);
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}
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let mut set2 = Self::from_str(set2_str)?;
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if set2.iter().filter(is_char_star).count() > 1 {
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return Err(BadSequence::MultipleCharRepeatInSet2);
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}
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if translating
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&& set2.iter().any(|&x| {
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matches!(x, Self::Class(_))
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&& !matches!(x, Self::Class(Class::Upper) | Self::Class(Class::Lower))
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})
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{
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return Err(BadSequence::ClassExceptLowerUpperInSet2);
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}
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let mut set1_solved: Vec<u8> = set1
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.iter()
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.flat_map(Self::flatten_all)
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.filter_map(to_u8)
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.collect();
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if complement_flag {
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set1_solved = (0..=u8::MAX).filter(|x| !set1_solved.contains(x)).collect();
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}
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let set1_len = set1_solved.len();
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let set2_len = set2
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.iter()
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.filter_map(|s| match s {
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Self::CharStar(_) => None,
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r => Some(r),
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})
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.flat_map(Self::flatten_all)
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.count();
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let star_compensate_len = set1_len.saturating_sub(set2_len);
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//Replace CharStar with CharRepeat
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set2 = set2
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.iter()
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.filter_map(|s| match s {
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Self::CharStar(0) => None,
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Self::CharStar(c) => Some(Self::CharRepeat(*c, star_compensate_len)),
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r => Some(*r),
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})
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.collect();
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//Flatten everything but upper/lower into Char
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let set1_flattened: Vec<_> = set1
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.iter()
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.flat_map(Self::flatten_non_lower_upper)
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.collect();
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set2 = set2
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.iter()
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.flat_map(Self::flatten_non_lower_upper)
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.collect();
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if set2
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.iter()
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.zip(
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set1_flattened
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.iter()
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.chain(std::iter::repeat(&Self::Char(0))),
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)
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.any(|x| matches!(x.0, Self::Class(_)) && !matches!(x.1, Self::Class(_)))
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{
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return Err(BadSequence::ClassInSet2NotMatchedBySet1);
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}
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let set2_solved: Vec<_> = set2
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.iter()
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.flat_map(Self::flatten_all)
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.filter_map(to_u8)
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.collect();
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//Truncation is done dead last. It has no influence on the other conversion steps
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if truncate_set1_flag {
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set1_solved.truncate(set2_solved.len());
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}
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Ok((set1_solved, set2_solved))
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}
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}
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@ -1369,3 +1369,8 @@ fn check_ignore_truncate_when_squeezing() {
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fn check_disallow_blank_in_set2_when_translating() {
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new_ucmd!().args(&["-t", "1234", "[:blank:]"]).fails();
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}
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#[test]
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fn check_class_in_set2_must_be_matched_in_set1() {
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new_ucmd!().args(&["-t", "1[:upper:]", "[:upper:]"]).fails();
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}
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