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comm: add --output-delimiter

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This commit is contained in:
Michael Gehring 2014-05-18 21:21:35 +02:00
parent c841b518d1
commit e216c5ca79
1 changed files with 14 additions and 7 deletions
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21
comm/comm.rs
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@ -21,21 +21,27 @@ use std::path::Path;
static NAME : &'static str = "comm";
static VERSION : &'static str = "1.0.0";
fn delim(col: int, opts: &getopts::Matches) -> ~str {
fn mkdelim(col: uint, opts: &getopts::Matches) -> StrBuf {
let mut s = StrBuf::new();
let delim = match opts.opt_str("output-delimiter") {
Some(d) => d.clone(),
None => "\t".to_strbuf(),
};
if col > 1 && !opts.opt_present("1") {
s.push_str("\t");
s.push_str(delim.as_slice());
}
if col > 2 && !opts.opt_present("2") {
s.push_str("\t");
s.push_str(delim.as_slice());
}
s.to_owned()
s
}
fn comm(a: &mut Box<Buffer>, b: &mut Box<Buffer>, opts: &getopts::Matches) {
let delim = Vec::from_fn(4, |col| mkdelim(col, opts));
let mut ra = a.read_line();
let mut rb = b.read_line();
@ -50,19 +56,19 @@ fn comm(a: &mut Box<Buffer>, b: &mut Box<Buffer>, opts: &getopts::Matches) {
match ord {
Less => {
if !opts.opt_present("1") {
print!("{}{}", delim(1, opts), ra.unwrap());
print!("{}{}", delim.get(1), ra.unwrap());
}
ra = a.read_line();
}
Greater => {
if !opts.opt_present("2") {
print!("{}{}", delim(2, opts), rb.unwrap());
print!("{}{}", delim.get(2), rb.unwrap());
}
rb = b.read_line();
}
Equal => {
if !opts.opt_present("3") {
print!("{}{}", delim(3, opts), ra.unwrap());
print!("{}{}", delim.get(3), ra.unwrap());
}
ra = a.read_line();
rb = b.read_line();
@ -87,6 +93,7 @@ pub fn main() {
getopts::optflag("1", "", "suppress column 1 (lines uniq to FILE1)"),
getopts::optflag("2", "", "suppress column 2 (lines uniq to FILE2)"),
getopts::optflag("3", "", "suppress column 3 (lines that appear in both files)"),
getopts::optopt("", "output-delimiter", "separate columns with STR", "STR"),
getopts::optflag("h", "help", "display this help and exit"),
getopts::optflag("V", "version", "output version information and exit"),
];