1// SPDX-License-Identifier: GPL-2.0
 2#include <stdio.h>
 3#include <stdlib.h>
 4#include <string.h>
 5
 6#include "../debug.h"
 7#include "helpline.h"
 8#include "ui.h"
 9#include "../util.h"
10
11char ui_helpline__current[512];
12
13static void nop_helpline__pop(void)
14{
15}
16
17static void nop_helpline__push(const char *msg __maybe_unused)
18{
19}
20
21static int nop_helpline__show(const char *fmt __maybe_unused,
22			       va_list ap __maybe_unused)
23{
24	return 0;
25}
26
27static struct ui_helpline default_helpline_fns = {
28	.pop	= nop_helpline__pop,
29	.push	= nop_helpline__push,
30	.show	= nop_helpline__show,
31};
32
33struct ui_helpline *helpline_fns = &default_helpline_fns;
34
35void ui_helpline__pop(void)
36{
37	helpline_fns->pop();
38}
39
40void ui_helpline__push(const char *msg)
41{
42	helpline_fns->push(msg);
43}
44
45void ui_helpline__vpush(const char *fmt, va_list ap)
46{
47	char *s;
48
49	if (vasprintf(&s, fmt, ap) < 0)
50		vfprintf(stderr, fmt, ap);
51	else {
52		ui_helpline__push(s);
53		free(s);
54	}
55}
56
57void ui_helpline__fpush(const char *fmt, ...)
58{
59	va_list ap;
60
61	va_start(ap, fmt);
62	ui_helpline__vpush(fmt, ap);
63	va_end(ap);
64}
65
66void ui_helpline__puts(const char *msg)
67{
68	ui_helpline__pop();
69	ui_helpline__push(msg);
70}
71
72int ui_helpline__vshow(const char *fmt, va_list ap)
73{
74	return helpline_fns->show(fmt, ap);
75}
76
77void ui_helpline__printf(const char *fmt, ...)
78{
79	va_list ap;
80
81	ui_helpline__pop();
82	va_start(ap, fmt);
83	ui_helpline__vpush(fmt, ap);
84	va_end(ap);
85}