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#[macro_use]
extern crate log;

use std::borrow::Cow;

use cerror::ErrorList;

fn cast_mut<'a, T>(x: *mut T) -> &'a mut T {
    unsafe {
        assert!(!x.is_null());
        &mut (*x)
    }
}

fn cast_const<'a, T>(x: *const T) -> &'a T {
    unsafe {
        assert!(!x.is_null(), "Object argument was null");
        &(*x)
    }
}

fn cstr<'a>(orig: *const libc::c_char) -> Cow<'a, str> {
    unsafe {
        if orig.is_null() {
            Cow::from("")
        } else {
            std::ffi::CStr::from_ptr(orig).to_string_lossy()
        }
    }
}

fn map_cerr<T, E: Into<Box<dyn std::error::Error>>>(
    x: Result<T, E>,
    err_ptr: *mut *mut ErrorList,
) -> Option<T> {
    match x {
        Ok(v) => Some(v),
        Err(err) => {
            if !err_ptr.is_null() {
                unsafe {
                    *err_ptr = cerror::new(err.into());
                }
            }
            None
        }
    }
}

/// Simple definition of a matrix from a single data type.
pub type Matrix<T> = Vec<Vec<T>>;

pub mod cerror;
pub mod corpusstorage;
pub mod data;
pub mod graph;
pub mod logging;
pub mod update;