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