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tag: v1.5.3.8
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Octocat-spinner-32-eaf2f5

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#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;

progress_update = 0;

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->delay) {
char buf[80];
if (!progress_update || --progress->delay)
return 0;
if (progress->total) {
unsigned percent = n * 100 / progress->total;
if (percent > progress->delayed_percent_treshold) {
/* inhibit this progress report entirely */
clear_progress_signal();
progress->delay = -1;
progress->total = 0;
return 0;
}
}
if (snprintf(buf, sizeof(buf),
progress->delayed_title, progress->total))
fprintf(stderr, "%s\n", buf);
}
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->prefix, percent, n, progress->total);
progress_update = 0;
progress->need_lf = 1;
return 1;
}
} else if (progress_update) {
fprintf(stderr, "%s%u\r", progress->prefix, n);
progress_update = 0;
progress->need_lf = 1;
return 1;
}
return 0;
}

void start_progress(struct progress *progress, const char *title,
const char *prefix, unsigned total)
{
char buf[80];
progress->prefix = prefix;
progress->total = total;
progress->last_percent = -1;
progress->delay = 0;
progress->need_lf = 0;
if (snprintf(buf, sizeof(buf), title, total))
fprintf(stderr, "%s\n", buf);
set_progress_signal();
}

void start_progress_delay(struct progress *progress, const char *title,
const char *prefix, unsigned total,
unsigned percent_treshold, unsigned delay)
{
progress->prefix = prefix;
progress->total = total;
progress->last_percent = -1;
progress->delayed_percent_treshold = percent_treshold;
progress->delayed_title = title;
progress->delay = delay;
progress->need_lf = 0;
set_progress_signal();
}

void stop_progress(struct progress *progress)
{
clear_progress_signal();
if (progress->need_lf)
fputc('\n', stderr);
}
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