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extern crate libc;
mod ll;
use std::ffi::{CStr, CString};
pub const WRDE_DOOFFS: i32 = (1 << 0);
pub const WRDE_APPEND: i32 = (1 << 1);
pub const WRDE_NOCMD: i32 = (1 << 2);
pub const WRDE_REUSE: i32 = (1 << 3);
pub const WRDE_SHOWERR: i32 = (1 << 4);
pub const WRDE_UNDEF: i32 = (1 << 5);
trait ToCStr {
fn to_c_str(&self) -> CString;
}
impl<'a> ToCStr for &'a str {
fn to_c_str(&self) -> CString {
CString::new(*self).unwrap()
}
}
#[allow(dead_code)]
pub struct Wordexp<'a> {
we_wordv: Vec<&'a str>,
counter: usize,
wordexp_ref: ll::wordexp_t,
}
impl<'a> Wordexp<'a> {
pub fn new(wordexp_ref: ll::wordexp_t) -> Self {
let we_wordc: usize = wordexp_ref.we_wordc as usize;
let mut we_wordv: Vec<&str> = Vec::with_capacity(we_wordc);
unsafe {
let ptr: *const *const libc::c_char = wordexp_ref.we_wordv;
for i in 0..we_wordc {
let cstr = CStr::from_ptr(*ptr.offset(i as isize));
if let Ok(s) = cstr.to_str() {
we_wordv.push(s);
}
}
}
Wordexp {
we_wordv,
counter: 0,
wordexp_ref,
}
}
}
impl<'a> std::ops::Drop for Wordexp<'a> {
fn drop(&mut self) {
drop(&self.wordexp_ref);
}
}
impl<'a> std::iter::Iterator for Wordexp<'a> {
type Item = &'a str;
fn next(&mut self) -> Option<&'a str> {
if self.counter >= self.we_wordv.len() {
self.counter = 0;
None
} else {
let item = self.we_wordv[self.counter];
self.counter = self.counter + 1;
Some(item)
}
}
}
#[derive(Clone, Debug)]
pub struct WordexpError {
pub error_type: i32,
}
impl WordexpError {
pub fn new(error_type: i32) -> Self {
WordexpError { error_type }
}
}
impl std::fmt::Display for WordexpError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "{}", self.error_type)
}
}
impl std::error::Error for WordexpError {}
pub fn wordexp<'a>(s: &str, flags: i32) -> Result<Wordexp, WordexpError> {
let mut wordexp = ll::wordexp_t {
we_wordc: 0,
we_wordv: std::ptr::null(),
we_offs: 0,
};
let result: i32;
unsafe {
result = ll::wordexp(s.to_c_str().as_ptr(), &mut wordexp, flags);
match result {
0 => Ok(Wordexp::new(wordexp)),
_ => Err(WordexpError::new(result)),
}
}
}
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