1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (C) 2019, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
3 
4 #include "evswitch.h"
5 #include "evlist.h"
6 
evswitch__discard(struct evswitch * evswitch,struct evsel * evsel)7 bool evswitch__discard(struct evswitch *evswitch, struct evsel *evsel)
8 {
9 	if (evswitch->on && evswitch->discarding) {
10 		if (evswitch->on != evsel)
11 			return true;
12 
13 		evswitch->discarding = false;
14 
15 		if (!evswitch->show_on_off_events)
16 			return true;
17 
18 		return false;
19 	}
20 
21 	if (evswitch->off && !evswitch->discarding) {
22 		if (evswitch->off != evsel)
23 			return false;
24 
25 		evswitch->discarding = true;
26 
27 		if (!evswitch->show_on_off_events)
28 			return true;
29 	}
30 
31 	return false;
32 }
33 
evswitch__fprintf_enoent(FILE * fp,const char * evtype,const char * evname)34 static int evswitch__fprintf_enoent(FILE *fp, const char *evtype, const char *evname)
35 {
36 	int printed = fprintf(fp, "ERROR: switch-%s event not found (%s)\n", evtype, evname);
37 
38 	return printed += fprintf(fp, "HINT:  use 'perf evlist' to see the available event names\n");
39 }
40 
evswitch__init(struct evswitch * evswitch,struct evlist * evlist,FILE * fp)41 int evswitch__init(struct evswitch *evswitch, struct evlist *evlist, FILE *fp)
42 {
43 	if (evswitch->on_name) {
44 		evswitch->on = evlist__find_evsel_by_str(evlist, evswitch->on_name);
45 		if (evswitch->on == NULL) {
46 			evswitch__fprintf_enoent(fp, "on", evswitch->on_name);
47 			return -ENOENT;
48 		}
49 		evswitch->discarding = true;
50 	}
51 
52 	if (evswitch->off_name) {
53 		evswitch->off = evlist__find_evsel_by_str(evlist, evswitch->off_name);
54 		if (evswitch->off == NULL) {
55 			evswitch__fprintf_enoent(fp, "off", evswitch->off_name);
56 			return -ENOENT;
57 		}
58 	}
59 
60 	return 0;
61 }
62