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|
/// Wraps `split_input` to work with owned `String` inputs.
pub(crate) fn split_input_string(input: String) -> Vec<String> {
split_input(&input)
}
/// Splits a string input into arguments, respecting single quotes, double quotes,
/// and backslash escaping.
pub(crate) fn split_input(input: &str) -> Vec<String> {
let mut result: Vec<String> = Vec::new();
let mut current = String::new();
let mut chars = input.chars().peekable();
while let Some(ch) = chars.next() {
match ch {
'\\' => {
// Take the next character literally (if any) and add it to current.
if let Some(next) = chars.next() {
current.push(next);
}
// If there's no next character, the backslash is just ignored/lost.
}
'"' | '\'' => {
// Start of a quoted segment.
let quote_char = ch;
let mut escaped = false;
loop {
match chars.next() {
None => break,
Some(c) => {
if escaped {
current.push(c);
escaped = false;
} else if c == '\\' {
escaped = true;
} else if c == quote_char {
break;
} else {
current.push(c);
}
}
}
}
}
' ' => {
if !current.is_empty() {
result.push(current.clone());
current.clear();
}
}
_ => {
current.push(ch);
}
}
}
if !current.is_empty() {
result.push(current);
}
result
}
#[cfg(test)]
mod splitter_tests {
use crate::program::repl_exec::splitter::split_input;
#[test]
fn test_split_with_double_quotes() {
let input = r#"a "b c" d"#;
let result = split_input(input);
assert_eq!(result, vec!["a", "b c", "d"]);
}
#[test]
fn test_split_with_single_quotes() {
let input = "a 'b c' d";
let result = split_input(input);
assert_eq!(result, vec!["a", "b c", "d"]);
}
#[test]
fn test_empty_input() {
assert!(split_input("").is_empty());
}
#[test]
fn test_no_quotes() {
let result = split_input("hello world");
assert_eq!(result, vec!["hello", "world"]);
}
#[test]
fn test_double_quotes_at_edges() {
let result = split_input(r#""hello world" foo"#);
assert_eq!(result, vec!["hello world", "foo"]);
}
#[test]
fn test_single_quotes_at_edges() {
let result = split_input("'hello world' foo");
assert_eq!(result, vec!["hello world", "foo"]);
}
#[test]
fn test_multiple_double_quoted_parts() {
let result = split_input(r#"a "b c" d "e f g""#);
assert_eq!(result, vec!["a", "b c", "d", "e f g"]);
}
#[test]
fn test_multiple_single_quoted_parts() {
let result = split_input("a 'b c' d 'e f g'");
assert_eq!(result, vec!["a", "b c", "d", "e f g"]);
}
#[test]
fn test_backslash_escaped_space() {
let result = split_input("a b\\ c d");
assert_eq!(result, vec!["a", "b c", "d"]);
}
#[test]
fn test_backslash_escaped_double_quote() {
let result = split_input(r#"a b\"c d"#);
assert_eq!(result, vec!["a", r#"b"c"#, "d"]);
}
#[test]
fn test_backslash_escaped_single_quote() {
let result = split_input("a b\\'c d");
assert_eq!(result, vec!["a", "b'c", "d"]);
}
}
|
