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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 | ||
16 | memset(&sa, 0, sizeof(sa)); | |
17 | sa.sa_handler = progress_interval; | |
18 | sigemptyset(&sa.sa_mask); | |
19 | sa.sa_flags = SA_RESTART; | |
20 | sigaction(SIGALRM, &sa, NULL); | |
21 | ||
22 | v.it_interval.tv_sec = 1; | |
23 | v.it_interval.tv_usec = 0; | |
24 | v.it_value = v.it_interval; | |
25 | setitimer(ITIMER_REAL, &v, NULL); | |
26 | } | |
27 | ||
28 | static void clear_progress_signal(void) | |
29 | { | |
30 | struct itimerval v = {{0,},}; | |
31 | setitimer(ITIMER_REAL, &v, NULL); | |
32 | signal(SIGALRM, SIG_IGN); | |
33 | progress_update = 0; | |
34 | } | |
35 | ||
36 | int display_progress(struct progress *progress, unsigned n) | |
37 | { | |
38 | if (progress->total) { | |
39 | unsigned percent = n * 100 / progress->total; | |
40 | if (percent != progress->last_percent || progress_update) { | |
41 | progress->last_percent = percent; | |
42 | fprintf(stderr, "%s%4u%% (%u/%u) done\r", | |
43 | progress->prefix, percent, n, progress->total); | |
44 | progress_update = 0; | |
45 | return 1; | |
46 | } | |
47 | } else if (progress_update) { | |
48 | fprintf(stderr, "%s%u\r", progress->prefix, n); | |
49 | progress_update = 0; | |
50 | return 1; | |
51 | } | |
52 | return 0; | |
53 | } | |
54 | ||
55 | void start_progress(struct progress *progress, const char *title, | |
56 | const char *prefix, unsigned total) | |
57 | { | |
58 | char buf[80]; | |
59 | progress->prefix = prefix; | |
60 | progress->total = total; | |
61 | progress->last_percent = -1; | |
62 | if (snprintf(buf, sizeof(buf), title, total)) | |
63 | fprintf(stderr, "%s\n", buf); | |
64 | set_progress_signal(); | |
65 | } | |
66 | ||
67 | void stop_progress(struct progress *progress) | |
68 | { | |
69 | clear_progress_signal(); | |
70 | if (progress->total) | |
71 | fputc('\n', stderr); | |
72 | } |