summaryrefslogtreecommitdiffstats
path: root/tools/perf/ui/helpline.c
blob: 911182b3f5e6cd1d21a53f397e696dcbd41726da (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "helpline.h"
#include "ui.h"

char ui_helpline__current[512];

static void nop_helpline__pop(void)
{
}

static void nop_helpline__push(const char *msg __maybe_unused)
{
}

static int nop_helpline__show(const char *fmt __maybe_unused,
			       va_list ap __maybe_unused)
{
	return 0;
}

static struct ui_helpline default_helpline_fns = {
	.pop	= nop_helpline__pop,
	.push	= nop_helpline__push,
	.show	= nop_helpline__show,
};

struct ui_helpline *helpline_fns = &default_helpline_fns;

void ui_helpline__pop(void)
{
	helpline_fns->pop();
}

void ui_helpline__push(const char *msg)
{
	helpline_fns->push(msg);
}

void ui_helpline__vpush(const char *fmt, va_list ap)
{
	char *s;

	if (vasprintf(&s, fmt, ap) < 0)
		vfprintf(stderr, fmt, ap);
	else {
		ui_helpline__push(s);
		free(s);
	}
}

void ui_helpline__fpush(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	ui_helpline__vpush(fmt, ap);
	va_end(ap);
}

void ui_helpline__puts(const char *msg)
{
	ui_helpline__pop();
	ui_helpline__push(msg);
}

int ui_helpline__vshow(const char *fmt, va_list ap)
{
	return helpline_fns->show(fmt, ap);
}

void ui_helpline__printf(const char *fmt, ...)
{
	va_list ap;

	ui_helpline__pop();
	va_start(ap, fmt);
	ui_helpline__vpush(fmt, ap);
	va_end(ap);
}