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Merge pull request #1495 from orottier/wc

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wc: Do not decode UTF8 when only counting bytes/newlines
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Sylvestre Ledru 2020-05-04 10:54:18 +02:00 • committed by GitHub
commit 06fe387c76
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1 changed files with 21 additions and 16 deletions
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5
src/uu/wc/src/wc.rs
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@ -146,6 +146,9 @@ fn wc(files: Vec<String>, settings: &Settings) -> StdResult<(), i32> {
let mut results = vec![]; let mut results = vec![];
let mut max_width: usize = 0; let mut max_width: usize = 0;
// we do not need to decode the byte stream if we're only counting bytes/newlines
let decode_chars = settings.show_chars || settings.show_words || settings.show_max_line_length;
for path in &files { for path in &files {
let mut reader = open(&path[..])?; let mut reader = open(&path[..])?;
@ -173,6 +176,7 @@ fn wc(files: Vec<String>, settings: &Settings) -> StdResult<(), i32> {
byte_count += raw_line.len(); byte_count += raw_line.len();
if decode_chars {
// try and convert the bytes to UTF-8 first // try and convert the bytes to UTF-8 first
let current_char_count; let current_char_count;
match from_utf8(&raw_line[..]) { match from_utf8(&raw_line[..]) {
@ -192,6 +196,7 @@ fn wc(files: Vec<String>, settings: &Settings) -> StdResult<(), i32> {
// matches GNU 'wc' behaviour // matches GNU 'wc' behaviour
longest_line_length = current_char_count - 1; longest_line_length = current_char_count - 1;
} }
}
raw_line.truncate(0); raw_line.truncate(0);
} }