1 c8846eb9 2020-10-12 neels int Chunk_bounds_check(Chunk *chunk, size_t start, size_t n)
 2 c8846eb9 2020-10-12 neels {
 3 c8846eb9 2020-10-12 neels     if (chunk == NULL) return 0;
 4 c8846eb9 2020-10-12 neels 
 5 c8846eb9 2020-10-12 neels     return start <= chunk->length && n <= chunk->length - start;
 6 c8846eb9 2020-10-12 neels }
 7 c8846eb9 2020-10-12 neels 
 8 c8846eb9 2020-10-12 neels void Chunk_copy(Chunk *src, size_t src_start, Chunk *dst, size_t dst_start, size_t n)
 9 c8846eb9 2020-10-12 neels {
10 c8846eb9 2020-10-12 neels     if (!Chunk_bounds_check(src, src_start, n)) return;
11 c8846eb9 2020-10-12 neels     if (!Chunk_bounds_check(dst, dst_start, n)) return;
12 c8846eb9 2020-10-12 neels 
13 c8846eb9 2020-10-12 neels     memcpy(dst->data + dst_start, src->data + src_start, n);
14 c8846eb9 2020-10-12 neels }