1#ifndef SLIDING_WINDOW_H_2#define SLIDING_WINDOW_H_34#include "strbuf.h"56struct sliding_view {7struct line_buffer *file;8off_t off;9size_t width;10off_t max_off; /* -1 means unlimited */11struct strbuf buf;12};1314#define SLIDING_VIEW_INIT(input, len) { (input), 0, 0, (len), STRBUF_INIT }1516extern int move_window(struct sliding_view *view, off_t off, size_t width);1718#endif