[thirdparty/git.git] / progress.c

#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);
}
Commit	Line	Data
96a02f8f NP	1	#include "git-compat-util.h"
	2	#include "progress.h"
	3
	4	static volatile sig_atomic_t progress_update;
	5
	6	static void progress_interval(int signum)
	7	{
	8	progress_update = 1;
	9	}
	10
	11	static void set_progress_signal(void)
	12	{
	13	struct sigaction sa;
	14	struct itimerval v;
	15
180a9f22 NP	16	progress_update = 0;
180a9f22 NP	17
96a02f8f NP	18	memset(&sa, 0, sizeof(sa));
	19	sa.sa_handler = progress_interval;
	20	sigemptyset(&sa.sa_mask);
	21	sa.sa_flags = SA_RESTART;
	22	sigaction(SIGALRM, &sa, NULL);
	23
	24	v.it_interval.tv_sec = 1;
	25	v.it_interval.tv_usec = 0;
	26	v.it_value = v.it_interval;
	27	setitimer(ITIMER_REAL, &v, NULL);
	28	}
	29
	30	static void clear_progress_signal(void)
	31	{
	32	struct itimerval v = {{0,},};
	33	setitimer(ITIMER_REAL, &v, NULL);
	34	signal(SIGALRM, SIG_IGN);
	35	progress_update = 0;
	36	}
	37
	38	int display_progress(struct progress *progress, unsigned n)
	39	{
180a9f22 NP	40	if (progress->delay) {
	41	char buf[80];
	42	if (!progress_update \|\| --progress->delay)
	43	return 0;
	44	if (progress->total) {
	45	unsigned percent = n * 100 / progress->total;
	46	if (percent > progress->delayed_percent_treshold) {
	47	/* inhibit this progress report entirely */
	48	clear_progress_signal();
	49	progress->delay = -1;
	50	progress->total = 0;
	51	return 0;
	52	}
	53	}
	54	if (snprintf(buf, sizeof(buf),
	55	progress->delayed_title, progress->total))
	56	fprintf(stderr, "%s\n", buf);
	57	}
96a02f8f NP	58	if (progress->total) {
	59	unsigned percent = n * 100 / progress->total;
	60	if (percent != progress->last_percent \|\| progress_update) {
	61	progress->last_percent = percent;
	62	fprintf(stderr, "%s%4u%% (%u/%u) done\r",
13aaf148	63	progress->prefix, percent, n, progress->total);
96a02f8f	64	progress_update = 0;
421f9d16	65	progress->need_lf = 1;
96a02f8f NP	66	return 1;
	67	}
	68	} else if (progress_update) {
13aaf148	69	fprintf(stderr, "%s%u\r", progress->prefix, n);
96a02f8f	70	progress_update = 0;
421f9d16	71	progress->need_lf = 1;
96a02f8f NP	72	return 1;
	73	}
	74	return 0;
	75	}
	76
13aaf148 NP	77	void start_progress(struct progress progress, const char title,
13aaf148 NP	78	const char *prefix, unsigned total)
96a02f8f	79	{
13aaf148 NP	80	char buf[80];
13aaf148 NP	81	progress->prefix = prefix;
96a02f8f NP	82	progress->total = total;
96a02f8f NP	83	progress->last_percent = -1;
180a9f22	84	progress->delay = 0;
421f9d16	85	progress->need_lf = 0;
13aaf148 NP	86	if (snprintf(buf, sizeof(buf), title, total))
13aaf148 NP	87	fprintf(stderr, "%s\n", buf);
96a02f8f NP	88	set_progress_signal();
	89	}
	90
180a9f22 NP	91	void start_progress_delay(struct progress progress, const char title,
	92	const char *prefix, unsigned total,
	93	unsigned percent_treshold, unsigned delay)
	94	{
	95	progress->prefix = prefix;
	96	progress->total = total;
	97	progress->last_percent = -1;
	98	progress->delayed_percent_treshold = percent_treshold;
	99	progress->delayed_title = title;
	100	progress->delay = delay;
421f9d16	101	progress->need_lf = 0;
180a9f22 NP	102	set_progress_signal();
	103	}
	104
96a02f8f NP	105	void stop_progress(struct progress *progress)
	106	{
	107	clear_progress_signal();
421f9d16	108	if (progress->need_lf)
96a02f8f NP	109	fputc('\n', stderr);
96a02f8f NP	110	}