Bas64 encode each element of `array` with the provided [`Engine`]
(
engine: &E,
array: &GenericBinaryArray<O>,
)
| 29 | |
| 30 | /// Bas64 encode each element of `array` with the provided [`Engine`] |
| 31 | pub fn b64_encode<E: Engine, O: OffsetSizeTrait>( |
| 32 | engine: &E, |
| 33 | array: &GenericBinaryArray<O>, |
| 34 | ) -> GenericStringArray<O> { |
| 35 | let lengths = array.offsets().windows(2).map(|w| { |
| 36 | let len = w[1].as_usize() - w[0].as_usize(); |
| 37 | encoded_len(len, engine.config().encode_padding()).unwrap() |
| 38 | }); |
| 39 | let offsets = OffsetBuffer::<O>::from_lengths(lengths); |
| 40 | let buffer_len = offsets.last().unwrap().as_usize(); |
| 41 | let mut buffer = vec![0_u8; buffer_len]; |
| 42 | let mut offset = 0; |
| 43 | |
| 44 | for i in 0..array.len() { |
| 45 | let len = engine |
| 46 | .encode_slice(array.value(i), &mut buffer[offset..]) |
| 47 | .unwrap(); |
| 48 | offset += len; |
| 49 | } |
| 50 | assert_eq!(offset, buffer_len); |
| 51 | |
| 52 | // Safety: Base64 is valid UTF-8 |
| 53 | unsafe { |
| 54 | GenericStringArray::new_unchecked(offsets, Buffer::from_vec(buffer), array.nulls().cloned()) |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | /// Base64 decode each element of `array` with the provided [`Engine`] |
| 59 | pub fn b64_decode<E: Engine, O: OffsetSizeTrait>( |