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Merge pull request #3998 from sylvestre/wc-doc

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wc: document the long match
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Sylvestre Ledru 2022-10-03 20:37:21 -10:00 • committed by GitHub
commit 436b7006f2
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1 changed files with 19 additions and 1 deletions
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src/uu/wc/src/wc.rs
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@ -317,6 +317,7 @@ fn word_count_from_reader<T: WordCountable>(
// Specialize scanning loop to improve the performance.
(false, false, false, false, false) => unreachable!(),
// show_bytes
(true, false, false, false, false) => {
// Fast path when only show_bytes is true.
let (bytes, error) = count_bytes_fast(&mut reader);
@ -330,58 +331,75 @@ fn word_count_from_reader<T: WordCountable>(
}
// Fast paths that can be computed without Unicode decoding.
// show_lines
(false, false, true, false, false) => {
count_bytes_chars_and_lines_fast::<_, false, false, true>(&mut reader)
}
// show_chars
(false, true, false, false, false) => {
count_bytes_chars_and_lines_fast::<_, false, true, false>(&mut reader)
}
// show_chars, show_lines
(false, true, true, false, false) => {
count_bytes_chars_and_lines_fast::<_, false, true, true>(&mut reader)
}
// show_bytes, show_lines
(true, false, true, false, false) => {
count_bytes_chars_and_lines_fast::<_, true, false, true>(&mut reader)
}
// show_bytes, show_chars
(true, true, false, false, false) => {
count_bytes_chars_and_lines_fast::<_, true, true, false>(&mut reader)
}
// show_bytes, show_chars, show_lines
(true, true, true, false, false) => {
count_bytes_chars_and_lines_fast::<_, true, true, true>(&mut reader)
}
// show_words
(_, false, false, false, true) => {
word_count_from_reader_specialized::<_, false, false, false, true>(reader)
}
// show_max_line_length
(_, false, false, true, false) => {
word_count_from_reader_specialized::<_, false, false, true, false>(reader)
}
// show_max_line_length, show_words
(_, false, false, true, true) => {
word_count_from_reader_specialized::<_, false, false, true, true>(reader)
}
// show_chars, show_words
(_, false, true, false, true) => {
word_count_from_reader_specialized::<_, false, true, false, true>(reader)
}
// show_chars, show_lines
(_, false, true, true, false) => {
word_count_from_reader_specialized::<_, false, true, true, false>(reader)
}
// show_lines, show_max_line_length, show_words
(_, false, true, true, true) => {
word_count_from_reader_specialized::<_, false, true, true, true>(reader)
}
// show_chars, show_words
(_, true, false, false, true) => {
word_count_from_reader_specialized::<_, true, false, false, true>(reader)
}
// show_chars, show_max_line_length
(_, true, false, true, false) => {
word_count_from_reader_specialized::<_, true, false, true, false>(reader)
}
// show_chars, show_max_line_length, show_words
(_, true, false, true, true) => {
word_count_from_reader_specialized::<_, true, false, true, true>(reader)
}
// show_chars, show_lines, show_words
(_, true, true, false, true) => {
word_count_from_reader_specialized::<_, true, true, false, true>(reader)
}
// show_chars, show_lines, show_max_line_length
(_, true, true, true, false) => {
word_count_from_reader_specialized::<_, true, true, true, false>(reader)
}
// show_chars, show_lines, show_max_line_length, show_words
(_, true, true, true, true) => {
word_count_from_reader_specialized::<_, true, true, true, true>(reader)
}