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