Method try_append_view

arrow-array/src/builder/generic_bytes_view_builder.rs:255–279

Try to append a view of the given `block`, `offset` and `length` See [`Self::append_block`]

(&mut self, block: u32, offset: u32, len: u32)

    ///
    /// See [`Self::append_block`]
    pub fn try_append_view(&mut self, block: u32, offset: u32, len: u32) -> Result<(), ArrowError> {
        let b = self.completed.get(block as usize).ok_or_else(|| {
            ArrowError::InvalidArgumentError(format!("No block found with index {block}"))
        })?;
        let start = offset as usize;
        let end = start.saturating_add(len as usize);

        let b = b.get(start..end).ok_or_else(|| {
            ArrowError::InvalidArgumentError(format!(
                "Range {start}..{end} out of bounds for block of length {}",
                b.len()
            ))
        })?;

        if T::Native::from_bytes_checked(b).is_none() {
            return Err(ArrowError::InvalidArgumentError(
                "Invalid view data".to_string(),
            ));
        }

        unsafe {
            self.append_view_unchecked(block, offset, len);
        }
        Ok(())
    }

    /// Flushes the in progress block if any
    #[inline]