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
11 char ui_helpline__current[512];
12
nop_helpline__pop(void)13 static void nop_helpline__pop(void)
14 {
15 }
16
nop_helpline__push(const char * msg __maybe_unused)17 static void nop_helpline__push(const char *msg __maybe_unused)
18 {
19 }
20
nop_helpline__show(const char * fmt __maybe_unused,va_list ap __maybe_unused)21 static int nop_helpline__show(const char *fmt __maybe_unused,
22 va_list ap __maybe_unused)
23 {
24 return 0;
25 }
26
27 static struct ui_helpline default_helpline_fns = {
28 .pop = nop_helpline__pop,
29 .push = nop_helpline__push,
30 .show = nop_helpline__show,
31 };
32
33 struct ui_helpline *helpline_fns = &default_helpline_fns;
34
ui_helpline__pop(void)35 void ui_helpline__pop(void)
36 {
37 helpline_fns->pop();
38 }
39
ui_helpline__push(const char * msg)40 void ui_helpline__push(const char *msg)
41 {
42 helpline_fns->push(msg);
43 }
44
ui_helpline__vpush(const char * fmt,va_list ap)45 void 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
ui_helpline__fpush(const char * fmt,...)57 void 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
ui_helpline__puts(const char * msg)66 void ui_helpline__puts(const char *msg)
67 {
68 ui_helpline__pop();
69 ui_helpline__push(msg);
70 }
71
ui_helpline__vshow(const char * fmt,va_list ap)72 int ui_helpline__vshow(const char *fmt, va_list ap)
73 {
74 return helpline_fns->show(fmt, ap);
75 }
76
ui_helpline__printf(const char * fmt,...)77 void 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 }
86