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funopen

esp_idf_hal::sys

Function funopen 

Source 
pub unsafe extern "C" fn funopen(
    __cookie: *const c_void,
    __readfn: Option<unsafe extern "C" fn(*mut c_void, *mut u8, i32) -> i32>,
    __writefn: Option<unsafe extern "C" fn(*mut c_void, *const u8, i32) -> i32>,
    __seekfn: Option<unsafe extern "C" fn(*mut c_void, i32, i32) -> i32>,
    __closefn: Option<unsafe extern "C" fn(*mut c_void) -> i32>,
) -> *mut __sFILE