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use paste::paste;
use std::mem::transmute;
use crate::{error::InterchangeError, ArrowArray, ArrowSchema, Interchange};
macro_rules! ffi_to_polars {
($to_ver:literal) => {
paste! {
impl Interchange {
#[doc = "Move Arrow data interchange format to Polars version `" $to_ver "`."]
pub fn [<to_polars_ $to_ver>](self) -> Result<[<polars_crate_ $to_ver>]::frame::DataFrame, InterchangeError> {
// Prepare series vec
let num_cols = self.ffi.len();
let mut columns = Vec::with_capacity(num_cols);
// For columns in the ffi
for s in self.ffi {
// Prepare chunks vec
let num_chunks = s.1.len();
let mut chunks = Vec::with_capacity(num_chunks);
// Get name of column
let name = s.0;
// For chunk in column
for c in s.1 {
// Convert ffi array from this crate's version of ArrowArray to polars-arrow
let ffi_array = unsafe { transmute::<ArrowArray, [<polars_arrow_ $to_ver>]::ffi::ArrowArray>(c.0) };
// Convert ffi field from this crate's version of ArrowField to polars-arrow
let ffi_field = unsafe { transmute::<ArrowSchema, [<polars_arrow_ $to_ver>]::ffi::ArrowSchema>(c.1) };
// Convert ffi to field
let field = unsafe {
[<polars_arrow_ $to_ver>]::ffi::import_field_from_c(&ffi_field)
}?;
// Convert ffi to chunk
let array = unsafe {
[<polars_arrow_ $to_ver>]::ffi::import_array_from_c(ffi_array, field.dtype().clone(),
)
}?;
// Add the chunks to the vec of chunks
chunks.push(array);
}
// Convert series to column
let column = [<polars_crate_ $to_ver>]::frame::column::Column::from(
[<polars_crate_ $to_ver>]::series::Series::from_arrow_chunks(
name.into(),
chunks,
)?);
// Put column in columns vec
columns.push(column);
}
// Create DataFrame out of Vec of series
Ok([<polars_crate_ $to_ver>]::frame::DataFrame::new_infer_height(columns)?)
}
}
}
};
}
#[cfg(feature = "polars_0_53")]
ffi_to_polars!("0_53");
macro_rules! ffi_to_polars {
($to_ver:literal) => {
paste! {
impl Interchange {
#[doc = "Move Arrow data interchange format to Polars version `" $to_ver "`."]
pub fn [<to_polars_ $to_ver>](self) -> Result<[<polars_crate_ $to_ver>]::frame::DataFrame, InterchangeError> {
// Prepare series vec
let num_cols = self.ffi.len();
let mut series = Vec::with_capacity(num_cols);
// For columns in the ffi
for s in self.ffi {
// Prepare chunks vec
let num_chunks = s.1.len();
let mut chunks = Vec::with_capacity(num_chunks);
// Get name of column
let name = s.0;
// For chunk in column
for c in s.1 {
// Convert ffi array from this crate's version of ArrowArray to polars-arrow
let ffi_array = unsafe { transmute::<ArrowArray, [<polars_arrow_ $to_ver>]::ffi::ArrowArray>(c.0) };
// Convert ffi field from this crate's version of ArrowField to polars-arrow
let ffi_field = unsafe { transmute::<ArrowSchema, [<polars_arrow_ $to_ver>]::ffi::ArrowSchema>(c.1) };
// Convert ffi to field
let field = unsafe {
[<polars_arrow_ $to_ver>]::ffi::import_field_from_c(&ffi_field)
}?;
// Convert ffi to chunk
let array = unsafe {
[<polars_arrow_ $to_ver>]::ffi::import_array_from_c(ffi_array, field.dtype().clone(),
)
}?;
// Add the chunks to the vec of chunks
chunks.push(array);
}
// Create series out of vec of chunks
series.push(
[<polars_crate_ $to_ver>]::series::Series::from_arrow_chunks(
name.into(),
chunks,
)?,
);
}
// Create DataFrame out of Vec of series
Ok([<polars_crate_ $to_ver>]::frame::DataFrame::from_iter(series))
}
}
}
};
}
#[cfg(feature = "polars_0_43")]
ffi_to_polars!("0_43");
#[cfg(feature = "polars_0_44")]
ffi_to_polars!("0_44");
#[cfg(feature = "polars_0_45")]
ffi_to_polars!("0_45");
#[cfg(feature = "polars_0_46")]
ffi_to_polars!("0_46");
#[cfg(feature = "polars_0_47")]
ffi_to_polars!("0_47");
#[cfg(feature = "polars_0_48")]
ffi_to_polars!("0_48");
#[cfg(feature = "polars_0_49")]
ffi_to_polars!("0_49");
#[cfg(feature = "polars_0_50")]
ffi_to_polars!("0_50");
#[cfg(feature = "polars_0_51")]
ffi_to_polars!("0_51");
#[cfg(feature = "polars_0_52")]
ffi_to_polars!("0_52");
macro_rules! ffi_to_polars {
($to_ver:literal) => {
paste! {
impl Interchange {
#[doc = "Move Arrow data interchange format to Polars version `" $to_ver "`."]
pub fn [<to_polars_ $to_ver>](self) -> Result<[<polars_crate_ $to_ver>]::frame::DataFrame, InterchangeError> {
// Prepare series vec
let num_cols = self.ffi.len();
let mut series = Vec::with_capacity(num_cols);
// For columns in the ffi
for s in self.ffi {
// Prepare chunks vec
let num_chunks = s.1.len();
let mut chunks = Vec::with_capacity(num_chunks);
// Get name of column
let name = s.0;
// For chunk in column
for c in s.1 {
// Convert ffi array from this crate's version of ArrowArray to polars-arrow
let ffi_array = unsafe { transmute::<ArrowArray, [<polars_arrow_ $to_ver>]::ffi::ArrowArray>(c.0) };
// Convert ffi field from this crate's version of ArrowField to polars-arrow
let ffi_field = unsafe { transmute::<ArrowSchema, [<polars_arrow_ $to_ver>]::ffi::ArrowSchema>(c.1) };
// Convert ffi to field
let field = unsafe {
[<polars_arrow_ $to_ver>]::ffi::import_field_from_c(&ffi_field)
}?;
// Convert ffi to chunk
let array = unsafe {
[<polars_arrow_ $to_ver>]::ffi::import_array_from_c(ffi_array, field.data_type().clone(),
)
}?;
// Add the chunks to the vec of chunks
chunks.push(array);
}
// Create series out of vec of chunks
series.push(
[<polars_crate_ $to_ver>]::series::Series::from_arrow_chunks(
&name,
chunks,
)?,
);
}
// Create DataFrame out of Vec of series
Ok([<polars_crate_ $to_ver>]::frame::DataFrame::from_iter(series))
}
}
}
};
}
#[cfg(feature = "polars_0_41")]
ffi_to_polars!("0_41");
#[cfg(feature = "polars_0_42")]
ffi_to_polars!("0_42");
macro_rules! ffi_to_polars {
($to_ver:literal) => {
paste! {
impl Interchange {
#[doc = "Move Arrow data interchange format to Polars version `" $to_ver "`."]
pub fn [<to_polars_ $to_ver>](self) -> Result<[<polars_crate_ $to_ver>]::frame::DataFrame, InterchangeError> {
// Prepare series vec
let num_cols = self.ffi.len();
let mut series = Vec::with_capacity(num_cols);
// For columns in the ffi
for s in self.ffi {
// Prepare chunks vec
let num_chunks = s.1.len();
let mut chunks = Vec::with_capacity(num_chunks);
// Get name of column
let name = s.0;
// For chunk in column
for c in s.1 {
// Convert ffi array from this crate's version of ArrowArray to polars-arrow
let ffi_array = unsafe { transmute::<ArrowArray, [<polars_arrow_ $to_ver>]::ffi::ArrowArray>(c.0) };
// Convert ffi field from this crate's version of ArrowField to polars-arrow
let ffi_field = unsafe { transmute::<ArrowSchema, [<polars_arrow_ $to_ver>]::ffi::ArrowSchema>(c.1) };
// Convert ffi to field
let field = unsafe {
[<polars_arrow_ $to_ver>]::ffi::import_field_from_c(&ffi_field)
}?;
// Convert ffi to chunk
let array = unsafe {
[<polars_arrow_ $to_ver>]::ffi::import_array_from_c(ffi_array, field.data_type().clone(),
)
}?;
let series_chunk = [<polars_crate_ $to_ver>]::series::Series::from_arrow(
&name,
array,
)?;
// Add the chunks to the vec of chunks
chunks.push(series_chunk);
}
// Create one series from multiple series chunks
let mut chunk_iter = chunks.into_iter();
let mut full_series = chunk_iter.next().unwrap();
for c in chunk_iter {
full_series.append(&c)?;
}
series.push(
full_series,
);
}
// Create DataFrame out of Vec of series
Ok([<polars_crate_ $to_ver>]::frame::DataFrame::from_iter(series))
}
}
}
};
}
#[cfg(feature = "polars_0_40")]
ffi_to_polars!("0_40");