1int Chunk_bounds_check(Chunk *chunk, size_t start, size_t n) 2{ 3 if (chunk == NULL) return 0; 4 5 return start <= chunk->length && n <= chunk->length - start; 6} 7 8void Chunk_copy(Chunk *src, size_t src_start, Chunk *dst, size_t dst_start, size_t n) 9{ 10 if (!Chunk_bounds_check(src, src_start, n)) return; 11 if (!Chunk_bounds_check(dst, dst_start, n)) return; 12 13 memcpy(dst->data + dst_start, src->data + src_start, n); 14} 15