Moving line parser to its own mod

This commit is contained in:
Raamakrishnan 2020-01-25 11:55:50 +05:30
parent cc689e66a0
commit ad231866fd

97
src/line_parser.rs Normal file
View file

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use std::collections::HashMap;
#[derive(PartialEq, Debug)]
pub enum LineType<'a> {
File(&'a str),
IncDir(Vec<&'a str>),
Define(HashMap<&'a str, &'a str>),
Filelist(&'a str),
Comment,
// Unknown,
}
pub fn parse_line(line: &str) -> LineType {
let line = line.trim();
if line.starts_with("-f ") {
let filelist_name = line.trim_start_matches("-f ");
LineType::Filelist(filelist_name)
} else if line.starts_with("+define+") {
// remove +define+ from start and "+" from end
let defines = line.trim_start_matches("+define+").trim_end_matches('+');
let mut define_map = HashMap::new();
for define in defines.split('+') {
let split: Vec<&str> = define.splitn(2, '=').collect();
define_map.insert(split[0], split[1]);
}
LineType::Define(define_map)
} else if line.starts_with("+incdir+") {
// remove +incdir+ from start and "+" from end
let incdirs = line.trim_start_matches("+incdir+").trim_end_matches('+');
let incdir_vec: Vec<&str> = incdirs.split('+').collect();
LineType::IncDir(incdir_vec)
} else if line.starts_with("//") {
LineType::Comment
} else {
// Mark everything else as a File
LineType::File(line)
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn parse_line_filelist() {
let line = "-f sample/files.f\n";
assert_eq!(parse_line(line), LineType::Filelist("sample/files.f"));
}
#[test]
fn parse_line_define_single() {
let line = "+define+CONST1=const1=23\n";
let mut define_map = HashMap::new();
define_map.insert("CONST1", "const1=23");
assert_eq!(parse_line(line), LineType::Define(define_map));
}
#[test]
fn parse_line_define_multiple() {
let line = "+define+CONST1=const1+CONST2=const2+CONST3=const3=1+\n";
let mut define_map = HashMap::new();
define_map.insert("CONST1", "const1");
define_map.insert("CONST2", "const2");
define_map.insert("CONST3", "const3=1");
assert_eq!(parse_line(line), LineType::Define(define_map));
}
#[test]
fn parse_line_incdir_single() {
let line = "+incdir+../sample_dir1/sample_dir2\n";
let incdir_vec = vec!["../sample_dir1/sample_dir2"];
assert_eq!(parse_line(line), LineType::IncDir(incdir_vec));
}
#[test]
fn parse_line_incdir_multiple() {
let line = "+incdir+../sample_dir1/sample_dir2+../sample_dir2/sample_dir3+sample_dir4/sample_dir5+\n";
let incdir_vec = vec![
"../sample_dir1/sample_dir2",
"../sample_dir2/sample_dir3",
"sample_dir4/sample_dir5",
];
assert_eq!(parse_line(line), LineType::IncDir(incdir_vec));
}
#[test]
fn parse_line_comment() {
let line = "//random_comment";
assert_eq!(parse_line(line), LineType::Comment);
}
#[test]
fn parse_line_file() {
let line = "any_random_line_is_a_file";
assert_eq!(parse_line(line), LineType::File("any_random_line_is_a_file"));
}
}