You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: erasure.rs
    path of file: ./repos/hypercube/src
    
    the code of the file until where you have to start completion: // Support erasure coding
use packet::{SharedBlob, BLOB_DATA_SIZE, BLOB_HEADER_SIZE};
use xpz_program_interface::pubkey::Pubkey;
use std::cmp;
use std::mem;
use std::result;
    
pub fn generate_coding_blocks(coding: &mut [&mut [u8]], data: &[&[u8]]) -> Result<()> {
    if data.is_empty() {
        return Ok(());
    }
    let k = data.len() as i32;
    let m = coding.len() as i32;
    let block_len = data[0].len() as i32;
    let matrix: Vec<i32> = get_matrix(m, k, ERASURE_W);
    let mut data_arg = Vec::with_capacity(data.len());
    for block in data {
        if block_len != block.len() as i32 {
            error!(
                "data block size incorrect {} expected {}",
                block.len(),
                block_len
            );
            return Err(ErasureError::InvalidBlockSize);
        }
        data_arg.push(block.as_ptr());
    }
    let mut coding_arg = Vec::with_capacity(coding.len());
    for mut block in coding {
        if block_len != block.len() as i32 {
            error!(
                "coding block size incorrect {} expected {}",
                block.len(),
                block_len
            );
            return Err(ErasureError::InvalidBlockSize);
        }
        coding_arg.push(block.as_mut_ptr());
    }

    unsafe {
        jerasure_matrix_encode(
            k,
            m,
            ERASURE_W,
            matrix.as_ptr(),
            data_arg.as_ptr(),
            coding_arg.as_ptr(),
            block_len,
        );
    }
    Ok(())
}