zarrs_ffi 0.8.2

#![doc = include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/README.md"))]
#![allow(non_snake_case)]
#![allow(non_camel_case_types)]

use std::ffi::{c_char, CString};

use once_cell::sync::Lazy;

extern crate zarrs;

mod array;
mod storage;
mod version;

pub use array::{
    array_read::*, array_read_write::*, array_sharded::*, array_write::*, data_type::*, *,
};
pub use storage::*;
pub use version::*;

#[non_exhaustive]
#[repr(i32)]
pub enum ZarrsResult {
    ZARRS_SUCCESS = 0,
    ZARRS_ERROR_NULL_PTR = -1,
    ZARRS_ERROR_STORAGE = -2,
    ZARRS_ERROR_ARRAY = -3,
    ZARRS_ERROR_BUFFER_LENGTH = -4,
    ZARRS_ERROR_INVALID_INDICES = -5,
    ZARRS_ERROR_NODE_PATH = -6,
    ZARRS_ERROR_STORE_PREFIX = -7,
    ZARRS_ERROR_INVALID_METADATA = -8,
    ZARRS_ERROR_STORAGE_CAPABILITY = -9,
    ZARRS_ERROR_UNKNOWN_CHUNK_GRID_SHAPE = -10,
    ZARRS_ERROR_UNKNOWN_INTERSECTING_CHUNKS = -11,
    ZARRS_ERROR_UNSUPPORTED_DATA_TYPE = -12,
}

static mut LAST_ERROR: Lazy<String> = Lazy::new(|| "".to_string());

/// Get the last error string.
///
/// The string must be freed with `zarrsFreeString`.
#[no_mangle]
pub extern "C" fn zarrsLastError() -> *mut c_char {
    let c_str = CString::new(unsafe { LAST_ERROR.as_str() }).unwrap();
    c_str.into_raw()
}

/// Free a string created by zarrs.
///
/// # Safety
/// `array` must be a valid string created by zarrs.
#[no_mangle]
pub unsafe extern "C" fn zarrsFreeString(string: *mut c_char) -> ZarrsResult {
    if string.is_null() {
        return ZarrsResult::ZARRS_ERROR_NULL_PTR;
    }
    unsafe {
        let _ = CString::from_raw(string);
    }
    ZarrsResult::ZARRS_SUCCESS
}