65 lines
1.3 KiB
Rust
65 lines
1.3 KiB
Rust
//! Foreign function interface utilities.
|
|
|
|
use crate::durandal::err::*;
|
|
pub use std::{ffi::*, os::raw::*, ptr::{null, null_mut}};
|
|
|
|
/// Creates a C string from a literal.
|
|
#[macro_export]
|
|
macro_rules! c_str {
|
|
($s:expr) => {concat!($s, "\0").as_ptr() as $crate::durandal::ffi::NT};
|
|
}
|
|
|
|
impl CStringVec
|
|
{
|
|
/// Creates a new empty CStringVec.
|
|
pub fn new() -> Self
|
|
{
|
|
Self{sv: Vec::new(), cv: vec![null()]}
|
|
}
|
|
|
|
/// Creates a new `CStringVec` from an iterator.
|
|
pub fn new_from_iter<'a, I: Iterator<Item = &'a str>>(it: I)
|
|
-> ResultS<Self>
|
|
{
|
|
let mut v = Self::new();
|
|
|
|
for st in it {
|
|
v.push(CString::new(st)?);
|
|
}
|
|
|
|
Ok(v)
|
|
}
|
|
|
|
/// Pushes a new `CString`.
|
|
pub fn push(&mut self, st: CString)
|
|
{
|
|
self.cv.insert(self.cv.len() - 1, st.as_c_str().as_ptr());
|
|
self.sv.push(st);
|
|
}
|
|
|
|
/// Returns the FFI pointer.
|
|
pub fn as_ptr(&self) -> *const NT
|
|
{
|
|
self.cv.as_ptr()
|
|
}
|
|
|
|
/// Returns the FFI pointer mutably.
|
|
pub fn as_mut_ptr(&mut self) -> *mut NT
|
|
{
|
|
self.cv.as_mut_ptr()
|
|
}
|
|
}
|
|
|
|
/// An owned null-terminated string vector.
|
|
#[derive(Debug)]
|
|
pub struct CStringVec
|
|
{
|
|
sv: Vec<CString>,
|
|
cv: Vec<NT>,
|
|
}
|
|
|
|
/// A null-terminated byte string pointer.
|
|
pub type NT = *const c_char;
|
|
|
|
// EOF
|