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