trixy 0.4.0

/*
* Copyright (C) 2023 - 2024:
* The Trinitrix Project <soispha@vhack.eu, antifallobst@systemausfall.org>
* SPDX-License-Identifier: GPL-3.0-or-later
*
* This file is part of the Trixy crate for Trinitrix.
*
* Trixy is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* and the GNU General Public License along with this program.
* If not, see <https://www.gnu.org/licenses/>.
*/

// Host code
/* Rust API */
#[derive(trixy::__private::thiserror::Error)]
#[allow(non_camel_case_types)]
#[derive(Debug)]
pub enum Err {
    /// This error should never be constructed, it is only here for the type information.
    #[error("This should be unreachable.")]
    __never,
}
impl From<crate::Err_c> for Err {
    fn from(value: crate::Err_c) -> Self {
        match value {
            crate::Err_c::__never => Self::__never,
        }
    }
}
#[derive(Debug)]
pub enum Commands {
    #[allow(non_camel_case_types)]
    void_input {
        trixy_output: trixy::oneshot::Sender<crate::Result_void_Err>,
    },
}
/* C API */
// Workaround rust rules when implementing a foreign trait on a foreign type
#[derive(Debug)]
pub struct OurResult<T, E> {
    value: Result<T, E>,
}
impl<T, E> std::ops::Deref for OurResult<T, E> {
    type Target = Result<T, E>;

    fn deref(&self) -> &Self::Target {
        &self.value
    }
}
impl<T, E> From<Result<T, E>> for OurResult<T, E> {
    fn from(value: Result<T, E>) -> Self {
        Self { value }
    }
}

#[derive(Debug)]
pub struct OurOption<T> {
    value: Option<T>,
}
impl<T> std::ops::Deref for OurOption<T> {
    type Target = Option<T>;

    fn deref(&self) -> &Self::Target {
        &self.value
    }
}

impl<T> From<Option<T>> for OurOption<T> {
    fn from(value: Option<T>) -> Self {
        Self { value }
    }
}
#[derive(Debug)]
pub struct OurVec<T> {
    value: Vec<T>,
}
impl<T> std::ops::Deref for OurVec<T> {
    type Target = Vec<T>;

    fn deref(&self) -> &Self::Target {
        &self.value
    }
}

impl<T> From<Vec<T>> for OurVec<T> {
    fn from(value: Vec<T>) -> Self {
        Self { value }
    }
}
/* The real C API */
#[allow(non_camel_case_types)]
#[repr(C)]
pub union Result_void_Err_value {
    ok: std::mem::ManuallyDrop<()>,
    err: std::mem::ManuallyDrop<crate::Err_c>,
}
#[allow(non_camel_case_types)]
#[repr(C)]
pub struct Result_void_Err {
    tag: trixy::types::ResultTag,
    value: Result_void_Err_value,
}
impl std::fmt::Debug for Result_void_Err {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self.tag {
            trixy::types::ResultTag::Ok => write!(f, "{:?}", unsafe { &self.value.ok }),
            trixy::types::ResultTag::Err => {
                write!(f, "{:?}", unsafe { &self.value.err })
            }
        }
    }
}
impl trixy::types::traits::convert_trait::Convertible for crate::OurResult<(), crate::Err_c> {
    type Ptr = Result_void_Err;
    fn into_ptr(self) -> Self::Ptr {
        if self.value.is_ok() {
            Self::Ptr {
                tag: trixy::types::ResultTag::Ok,
                value: Result_void_Err_value {
                    ok: std::mem::ManuallyDrop::new(self.value.expect("Is ok")),
                },
            }
        } else {
            Self::Ptr {
                tag: trixy::types::ResultTag::Err,
                value: Result_void_Err_value {
                    err: std::mem::ManuallyDrop::new(self.value.expect_err("Is err")),
                },
            }
        }
    }
    fn from_ptr(_ptr: Self::Ptr) -> Result<Self, trixy::types::error::TypeConversionError> {
        unreachable!("This should probably not be called?");
    }
}
#[derive(trixy::__private::thiserror::Error)]
#[allow(non_camel_case_types)]
#[repr(C)]
#[derive(Debug)]
pub enum Err_c {
    /// This error should never be constructed, it is only here for the type information.
    #[error("This should be unreachable.")]
    __never,
}
impl From<crate::Err> for Err_c {
    fn from(value: crate::Err) -> Self {
        match value {
            crate::Err::__never => Self::__never,
        }
    }
}
#[no_mangle]
pub extern "C" fn void_input(output: *mut crate::Result_void_Err) -> core::ffi::c_int {
    let output_val: crate::Result_void_Err = {
        let (tx, rx) = trixy::oneshot::channel();
        let error = std::panic::catch_unwind(|| {
            crate::callback_function(crate::Commands::void_input { trixy_output: tx });
            0
        });
        if let Err(_) = error {
            eprintln!("Catched a panic just before the c ffi.");
            std::process::exit(1);
        }
        let recv = rx
            .recv()
            .expect("The channel should not be closed until this value is received");
        recv.into()
    };
    unsafe {
        std::ptr::write(output, output_val);
    }
    return 1;
}
// vim: filetype=rust