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Code Issues Activity

cat: squeeze blank keeps up to one blank line

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This commit is contained in:
Nathan Ross 2016-02-16 18:44:00 -05:00
parent 1c1cf2446e
commit a4e1372451
1 changed files with 5 additions and 1 deletions
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6
src/cat/cat.rs
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@ -101,6 +101,7 @@ fn write_lines(files: Vec<String>, number: NumberingMode, squeeze_blank: bool,
let mut out_buf = [0; 1024 * 64];
let mut writer = UnsafeWriter::new(&mut out_buf[..], stdout());
let mut at_line_start = true;
let mut one_blank_kept = false;
while let Ok(n) = reader.read(&mut in_buf) {
if n == 0 { break }
@ -113,7 +114,8 @@ fn write_lines(files: Vec<String>, number: NumberingMode, squeeze_blank: bool,
None => break,
};
if in_buf[pos] == '\n' as u8 {
if !at_line_start || !squeeze_blank {
if !at_line_start || !squeeze_blank || !one_blank_kept {
one_blank_kept = true;
if at_line_start && number == NumberingMode::NumberAll {
(write!(&mut writer, "{0:6}\t", line_counter)).unwrap();
line_counter += 1;
@ -128,6 +130,8 @@ fn write_lines(files: Vec<String>, number: NumberingMode, squeeze_blank: bool,
}
at_line_start = true;
continue;
} else if one_blank_kept {
one_blank_kept = false;
}
if at_line_start && number != NumberingMode::NumberNone {
(write!(&mut writer, "{0:6}\t", line_counter)).unwrap();