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ffi.rs
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ffi.rs
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use crate::{
array::{FromFfi, ToFfi},
bitmap::align,
error::Result,
ffi,
};
use super::FixedSizeBinaryArray;
unsafe impl ToFfi for FixedSizeBinaryArray {
fn buffers(&self) -> Vec<Option<*const u8>> {
vec![
self.validity.as_ref().map(|x| x.as_ptr()),
Some(self.values.as_ptr().cast::<u8>()),
]
}
fn offset(&self) -> Option<usize> {
let offset = self.values.offset() / self.size;
if let Some(bitmap) = self.validity.as_ref() {
if bitmap.offset() == offset {
Some(offset)
} else {
None
}
} else {
Some(offset)
}
}
fn to_ffi_aligned(&self) -> Self {
let offset = self.values.offset() / self.size;
let validity = self.validity.as_ref().map(|bitmap| {
if bitmap.offset() == offset {
bitmap.clone()
} else {
align(bitmap, offset)
}
});
Self {
size: self.size,
data_type: self.data_type.clone(),
validity,
values: self.values.clone(),
}
}
}
impl<A: ffi::ArrowArrayRef> FromFfi<A> for FixedSizeBinaryArray {
unsafe fn try_from_ffi(array: A) -> Result<Self> {
let data_type = array.data_type().clone();
let validity = unsafe { array.validity() }?;
let values = unsafe { array.buffer::<u8>(1) }?;
Self::try_new(data_type, values, validity)
}
}