public static ArrayList<Chunk> splitChunk(Chunk chunk_to_split, int parts) {
int length = chunk_to_split.GetSize();
// Limit cases
if (length == 0) return null;
// If I'm trying to create more parts than those that can be actually
// created, then don't create more parts.
if (length < parts) parts = length;
Chunk[] split_chunks = new Chunk[parts];
int elems_per_part = length / parts;
int remain_elems = length % parts; // elements to append to the last part
int index = 0;
for (int i = 0; i < parts; i++) {
int size_chunk = 0;
// If this is the last chunk, then append remainder
if (remain_elems > 0) {
size_chunk = elems_per_part + 1;
remain_elems--;
} else
// Else the size is just the number of elements
size_chunk = elems_per_part;
int[] new_chunk = new int[size_chunk];
// Create the chunk elem by elem.
for (int j = 0; j < size_chunk; j++) new_chunk[j] = chunk_to_split.GetData()[index + j];
// Create the chunk object;
split_chunks[i] = new Chunk(new_chunk);
// Increment index
index += size_chunk;
}
ArrayList<Chunk> chunks_list = new ArrayList<Chunk>();
for (int i = 0; i < split_chunks.length; i++) chunks_list.add(split_chunks[i]);
return chunks_list;
}
public static void WriteFile(String path, Chunk contents) {
try {
BufferedWriter out = new BufferedWriter(new FileWriter(path));
out.write(contents.toString());
out.close();
} catch (IOException e) {
System.err.println("Error: writing file " + path);
}
}
public static Chunk MergeTwoChunks(Chunk chunk1, Chunk chunk2) {
if ((chunk1 == null) && (chunk2 == null)) return null;
else if (chunk1 == null) return chunk2;
else if (chunk2 == null) return chunk1;
// work out size of combined chunk
int combined_length = chunk1.GetData().length + chunk2.GetData().length;
int[] data = Arrays.copyOf(chunk1.GetData(), combined_length);
System.arraycopy(chunk2.GetData(), 0, data, chunk1.GetData().length, chunk2.GetData().length);
return new Chunk(data);
}
