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Use .unwrap() and &byte for cleaner code.

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This commit is contained in:
Dawid Ciężarkiewicz 2014-03-19 09:47:06 -07:00
parent 4b702bc952
commit 0a91290d91
1 changed files with 16 additions and 34 deletions
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50
cat/cat.rs
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@ -116,50 +116,34 @@ pub fn exec(files: ~[~str], number: NumberingMode, show_nonprint: bool, show_end
// EOF, rather than return Some(0) like a file.
match reader.read(buf) {
Ok(n) if n != 0 => {
for byte in buf.slice_to(n).iter() {
if at_line_start && (number == NumberAll || (number == NumberNonEmpty && !is_newline_char(*byte))) {
match write!(&mut writer as &mut Writer, "{0:6u}\t", counter) {
Ok(_) => (), Err(err) => fail!("{}", err)
};
for &byte in buf.slice_to(n).iter() {
if at_line_start && (number == NumberAll || (number == NumberNonEmpty && !is_newline_char(byte))) {
(write!(&mut writer as &mut Writer, "{0:6u}\t", counter)).unwrap();
counter += 1;
at_line_start = false;
}
if is_numbering && *byte == LF {
if is_numbering && byte == LF {
at_line_start = true;
}
if show_tabs && *byte == TAB {
match writer.write(bytes!("^I")) {
Ok(_) => (), Err(err) => fail!("{}", err)
};
} else if show_ends && *byte == LF {
match writer.write(bytes!("$\n")) {
Ok(_) => (), Err(err) => fail!("{}", err)
};
} else if show_nonprint && (*byte < 32 || *byte >= 127) && !is_newline_char(*byte) {
let mut byte = *byte;
if show_tabs && byte == TAB {
writer.write(bytes!("^I")).unwrap();
} else if show_ends && byte == LF {
writer.write(bytes!("$\n")).unwrap();
} else if show_nonprint && (byte < 32 || byte >= 127) && !is_newline_char(byte) {
let mut byte = byte;
if byte >= 128 {
match writer.write(bytes!("M-")) {
Ok(_) => (), Err(err) => fail!("{}", err)
};
writer.write(bytes!("M-")).unwrap();
byte = byte - 128;
}
if byte < 32 {
match writer.write(['^' as u8, byte + 64]) {
Ok(_) => (), Err(err) => fail!("{}", err)
};
writer.write(['^' as u8, byte + 64]).unwrap();
} else if byte == 127 {
match writer.write(['^' as u8, byte - 64]) {
Ok(_) => (), Err(err) => fail!("{}", err)
};
writer.write(['^' as u8, byte - 64]).unwrap();
} else {
match writer.write([byte]) {
Ok(_) => (), Err(err) => fail!("{}", err)
};
writer.write_u8(byte).unwrap();
}
} else {
match writer.write([*byte]) {
Ok(_) => (), Err(err) => fail!("{}", err)
};
writer.write_u8(byte).unwrap();
}
}
},
@ -184,9 +168,7 @@ pub fn exec(files: ~[~str], number: NumberingMode, show_nonprint: bool, show_end
// rather than return Some(0) like a file.
match reader.read(buf) {
Ok(n) if n != 0 => {
match writer.write(buf.slice_to(n)) {
Ok(_) => (), Err(err) => fail!("{}", err)
}
writer.write(buf.slice_to(n)).unwrap();
}, _ => break
}
}