+ struct throughput *tp;
+ struct timeval tv;
+ unsigned int misecs;
+
+ if (!progress)
+ return;
+ tp = progress->throughput;
+
+ gettimeofday(&tv, NULL);
+
+ if (!tp) {
+ progress->throughput = tp = calloc(1, sizeof(*tp));
+ if (tp) {
+ tp->prev_total = tp->curr_total = total;
+ tp->prev_tv = tv;
+ }
+ return;
+ }
+ tp->curr_total = total;
+
+ /*
+ * We have x = bytes and y = microsecs. We want z = KiB/s:
+ *
+ * z = (x / 1024) / (y / 1000000)
+ * z = x / y * 1000000 / 1024
+ * z = x / (y * 1024 / 1000000)
+ * z = x / y'
+ *
+ * To simplify things we'll keep track of misecs, or 1024th of a sec
+ * obtained with:
+ *
+ * y' = y * 1024 / 1000000
+ * y' = y / (1000000 / 1024)
+ * y' = y / 977
+ */
+ misecs = (tv.tv_sec - tp->prev_tv.tv_sec) * 1024;
+ misecs += (int)(tv.tv_usec - tp->prev_tv.tv_usec) / 977;
+
+ if (misecs > 512) {
+ unsigned int count, rate;
+
+ count = total - tp->prev_total;
+ tp->prev_total = total;
+ tp->prev_tv = tv;
+ tp->avg_bytes += count;
+ tp->avg_misecs += misecs;
+ rate = tp->avg_bytes / tp->avg_misecs;
+ tp->avg_bytes -= tp->last_bytes[tp->idx];
+ tp->avg_misecs -= tp->last_misecs[tp->idx];
+ tp->last_bytes[tp->idx] = count;
+ tp->last_misecs[tp->idx] = misecs;
+ tp->idx = (tp->idx + 1) % TP_IDX_MAX;
+
+ throughput_string(tp, total, rate);
+ if (progress->last_value != -1 && progress_update)
+ display(progress, progress->last_value, NULL);
+ }
+}
+
+int display_progress(struct progress *progress, unsigned n)
+{
+ return progress ? display(progress, n, NULL) : 0;
+}
+
+struct progress *start_progress_delay(const char *title, unsigned total,
+ unsigned percent_treshold, unsigned delay)
+{
+ struct progress *progress = malloc(sizeof(*progress));
+ if (!progress) {
+ /* unlikely, but here's a good fallback */
+ fprintf(stderr, "%s...\n", title);
+ fflush(stderr);
+ return NULL;
+ }
+ progress->title = title;