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use std::env;
use tokenizer::{Token, tokenize};
pub enum ParseErr {
JobsNaN(String),
JobsNoValue,
}
// Parses input arguments and stores their values into their associated variabless.
pub fn parse_arguments(ncores: &mut usize, command: &mut String, arg_tokens: &mut Vec<Token>,
input_variables: &mut Vec<String>) -> Result<(), ParseErr>
{
let mut parsing_arguments = true;
let mut command_is_set = false;
let mut raw_args = env::args().skip(1).peekable();
let mut comm = String::new();
while let Some(argument) = raw_args.next() {
if parsing_arguments {
match argument.as_str() {
// Defines the number of jobs to run in parallel.
"-j" => {
match raw_args.peek() {
Some(val) => match val.parse::<usize>() {
Ok(val) => *ncores = val,
Err(_) => return Err(ParseErr::JobsNaN(val.clone()))
},
None => return Err(ParseErr::JobsNoValue)
}
let _ = raw_args.next();
},
// Arguments after `:::` are input values.
":::" => parsing_arguments = false,
_ => {
if command_is_set {
comm.push(' ');
comm.push_str(&argument);
} else {
comm.push_str(&argument);
command_is_set = true;
}
}
}
} else {
input_variables.push(argument);
}
}
// This will fill in command and argument information needed by the threads.
// If there is a space in the argument, then the command has arguments
match comm.chars().position(|x| x == ' ') {
Some(pos) => {
*command = String::from(&comm[0..pos]);
*arg_tokens = tokenize(&comm[pos+1..]);
},
None => *command = comm
}
Ok(())
}
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