1
2#include <stdio.h>
3#include <stdlib.h>
4#include <string.h>
5
6#include "helpline.h"
7#include "ui.h"
8
9char ui_helpline__current[512];
10
11static void nop_helpline__pop(void)
12{
13}
14
15static void nop_helpline__push(const char *msg __maybe_unused)
16{
17}
18
19static int nop_helpline__show(const char *fmt __maybe_unused,
20 va_list ap __maybe_unused)
21{
22 return 0;
23}
24
25static struct ui_helpline default_helpline_fns = {
26 .pop = nop_helpline__pop,
27 .push = nop_helpline__push,
28 .show = nop_helpline__show,
29};
30
31struct ui_helpline *helpline_fns = &default_helpline_fns;
32
33void ui_helpline__pop(void)
34{
35 helpline_fns->pop();
36}
37
38void ui_helpline__push(const char *msg)
39{
40 helpline_fns->push(msg);
41}
42
43void 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
55void 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
64void ui_helpline__puts(const char *msg)
65{
66 ui_helpline__pop();
67 ui_helpline__push(msg);
68}
69
70int ui_helpline__vshow(const char *fmt, va_list ap)
71{
72 return helpline_fns->show(fmt, ap);
73}
74
75void 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
