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// Copyright 2020 WeDPR Lab Project Authors. Licensed under Apache-2.0.

//! Library of shared utilities for FFI targeting C/C++
//! compatible architectures (including iOS).

/// Patch code to fix the missing 'backtrace_*' related functions errors during
/// cross compilation. Do not modify them if you are not sure.
#[allow(non_camel_case_types)]
pub mod backtrace_patch {
    extern crate libc;

    use self::libc::uintptr_t;
    use std::os::raw::{c_char, c_int, c_void};

    pub type backtrace_syminfo_callback = extern "C" fn(
        data: *mut c_void,
        pc: uintptr_t,
        symname: *const c_char,
        symval: uintptr_t,
        symsize: uintptr_t,
    );

    pub type backtrace_full_callback = extern "C" fn(
        data: *mut c_void,
        pc: uintptr_t,
        filename: *const c_char,
        lineno: c_int,
        function: *const c_char,
    ) -> c_int;

    pub type backtrace_error_callback =
        extern "C" fn(data: *mut c_void, msg: *const c_char, errnum: c_int);

    pub enum backtrace_state {}

    #[no_mangle]
    pub extern "C" fn __rbt_backtrace_create_state(
        _filename: *const c_char,
        _threaded: c_int,
        _error: backtrace_error_callback,
        _data: *mut c_void,
    ) -> *mut backtrace_state {
        0 as *mut _
    }

    #[no_mangle]
    pub extern "C" fn __rbt_backtrace_syminfo(
        _state: *mut backtrace_state,
        _addr: uintptr_t,
        _cb: backtrace_syminfo_callback,
        _error: backtrace_error_callback,
        _data: *mut c_void,
    ) -> c_int {
        0
    }

    #[no_mangle]
    pub extern "C" fn __rbt_backtrace_pcinfo(
        _state: *mut backtrace_state,
        _addr: uintptr_t,
        _cb: backtrace_full_callback,
        _error: backtrace_error_callback,
        _data: *mut c_void,
    ) -> c_int {
        0
    }
}