Function ptr_to_vec

crates/stdlib/src/_sqlite3.rs:3429–3446

(
        p: *const u8,
        nbytes: c_int,
        db: *mut sqlite3,
        vm: &VirtualMachine,
    )

    }

    fn ptr_to_vec(
        p: *const u8,
        nbytes: c_int,
        db: *mut sqlite3,
        vm: &VirtualMachine,
    ) -> PyResult<Vec<u8>> {
        if p.is_null() {
            if !db.is_null() && unsafe { sqlite3_errcode(db) } == SQLITE_NOMEM {
                Err(vm.new_memory_error("sqlite out of memory"))
            } else {
                Ok(vec![])
            }
        } else if nbytes < 0 {
            Err(vm.new_system_error("negative size with ptr"))
        } else {
            Ok(unsafe { core::slice::from_raw_parts(p.cast(), nbytes as usize) }.to_vec())
        }
    }

    fn str_to_ptr_len(s: &PyUtf8Str, vm: &VirtualMachine) -> PyResult<(*const libc::c_char, i32)> {
        let s_str = s.as_str();