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-rw-r--r--progress.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/progress.c b/progress.c
new file mode 100644
index 0000000..702e116
--- /dev/null
+++ b/progress.c
@@ -0,0 +1,68 @@
+#include "git-compat-util.h"
+#include "progress.h"
+
+static volatile sig_atomic_t progress_update;
+
+static void progress_interval(int signum)
+{
+ progress_update = 1;
+}
+
+static void set_progress_signal(void)
+{
+ struct sigaction sa;
+ struct itimerval v;
+
+ memset(&sa, 0, sizeof(sa));
+ sa.sa_handler = progress_interval;
+ sigemptyset(&sa.sa_mask);
+ sa.sa_flags = SA_RESTART;
+ sigaction(SIGALRM, &sa, NULL);
+
+ v.it_interval.tv_sec = 1;
+ v.it_interval.tv_usec = 0;
+ v.it_value = v.it_interval;
+ setitimer(ITIMER_REAL, &v, NULL);
+}
+
+static void clear_progress_signal(void)
+{
+ struct itimerval v = {{0,},};
+ setitimer(ITIMER_REAL, &v, NULL);
+ signal(SIGALRM, SIG_IGN);
+ progress_update = 0;
+}
+
+int display_progress(struct progress *progress, unsigned n)
+{
+ if (progress->total) {
+ unsigned percent = n * 100 / progress->total;
+ if (percent != progress->last_percent || progress_update) {
+ progress->last_percent = percent;
+ fprintf(stderr, "%s%4u%% (%u/%u) done\r",
+ progress->msg, percent, n, progress->total);
+ progress_update = 0;
+ return 1;
+ }
+ } else if (progress_update) {
+ fprintf(stderr, "%s%u\r", progress->msg, n);
+ progress_update = 0;
+ return 1;
+ }
+ return 0;
+}
+
+void start_progress(struct progress *progress, const char *msg, unsigned total)
+{
+ progress->msg = msg;
+ progress->total = total;
+ progress->last_percent = -1;
+ set_progress_signal();
+}
+
+void stop_progress(struct progress *progress)
+{
+ clear_progress_signal();
+ if (progress->total)
+ fputc('\n', stderr);
+}