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-f flag for uniq

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This commit is contained in:
Karol Rozycki 2015-07-31 19:37:40 +02:00
parent 0b9433ea9f
commit b025b44806
1 changed files with 27 additions and 1 deletions
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28
src/uniq/uniq.rs
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@ -32,6 +32,7 @@ struct Uniq {
all_repeated: bool,
delimiters: String,
show_counts: bool,
skip_fields: Option<usize>,
slice_start: Option<usize>,
slice_stop: Option<usize>,
ignore_case: bool,
@ -45,7 +46,7 @@ impl Uniq {
for io_line in reader.lines() {
let line = crash_if_err!(1, io_line);
if !lines.is_empty() && self.cmp_key(&lines[0]) != self.cmp_key(&line) {
if !lines.is_empty() && self.cmp_key(&self.skip_fields(&lines[0])) != self.cmp_key(&self.skip_fields(&line)) {
let print_delimiter = delimiters == "prepend" || (delimiters == "separate" && first_line_printed);
first_line_printed |= self.print_lines(writer, &lines, print_delimiter);
lines.truncate(0);
@ -58,6 +59,29 @@ impl Uniq {
}
}
fn skip_fields(&self, line: &String) -> String {
match self.skip_fields {
Some(skip_fields) =>
if line.split_whitespace().count() > skip_fields {
let mut field = 0;
let mut i = 0;
while field < skip_fields && i < line.len() {
while i < line.len() && line.chars().nth(i).unwrap().is_whitespace() {
i = i + 1;
}
while i < line.len() && !line.chars().nth(i).unwrap().is_whitespace() {
i = i + 1;
}
field = field + 1;
}
line[i..].to_string()
} else {
"".to_string()
},
None => line[..].to_string()
}
}
fn cmp_key(&self, line: &String) -> String {
let len = line.len();
if len > 0 {
@ -132,6 +156,7 @@ pub fn uumain(args: Vec<String>) -> i32 {
"print all duplicate lines delimit-method={none(default),prepend,separate} Delimiting is done with blank lines",
"delimit-method"
);
opts.optopt("f", "skip-fields", "avoid comparing the first N fields", "N");
opts.optopt("s", "skip-chars", "avoid comparing the first N characters", "N");
opts.optopt("w", "check-chars", "compare no more than N characters in lines", "N");
opts.optflag("i", "ignore-case", "ignore differences in case when comparing");
@ -181,6 +206,7 @@ pub fn uumain(args: Vec<String>) -> i32 {
_ => "".to_string()
},
show_counts: matches.opt_present("count"),
skip_fields: opt_parsed("skip-fields", &matches),
slice_start: opt_parsed("skip-chars", &matches),
slice_stop: opt_parsed("check-chars", &matches),
ignore_case: matches.opt_present("ignore-case"),