Function ket_error_message 

#[unsafe(no_mangle)]
pub extern "C" fn ket_error_message(
    error_code: i32,
    error_message: *mut *const c_char,
) -> i32

Retrieves the human-readable error message for a given integer error code.

On success the function heap-allocates a null-terminated C string and writes its address into *error_message. The caller must free this string with ket_string_delete when done.

Returns

0 on success; a non-zero error code if the C string could not be allocated (e.g., if the message contains interior null bytes).