tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#define _GNU_SOURCE
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 "libslang.h"
10
11void ui_helpline__pop(void)
12{
13}
14
15char ui_helpline__current[512];
16
17void ui_helpline__push(const char *msg)
18{
19 const size_t sz = sizeof(ui_helpline__current);
20
21 SLsmg_gotorc(SLtt_Screen_Rows - 1, 0);
22 SLsmg_set_color(0);
23 SLsmg_write_nstring((char *)msg, SLtt_Screen_Cols);
24 SLsmg_refresh();
25 strncpy(ui_helpline__current, msg, sz)[sz - 1] = '\0';
26}
27
28void ui_helpline__vpush(const char *fmt, va_list ap)
29{
30 char *s;
31
32 if (vasprintf(&s, fmt, ap) < 0)
33 vfprintf(stderr, fmt, ap);
34 else {
35 ui_helpline__push(s);
36 free(s);
37 }
38}
39
40void ui_helpline__fpush(const char *fmt, ...)
41{
42 va_list ap;
43
44 va_start(ap, fmt);
45 ui_helpline__vpush(fmt, ap);
46 va_end(ap);
47}
48
49void ui_helpline__puts(const char *msg)
50{
51 ui_helpline__pop();
52 ui_helpline__push(msg);
53}
54
55void ui_helpline__init(void)
56{
57 ui_helpline__puts(" ");
58}
59
60char ui_helpline__last_msg[1024];
61
62int ui_helpline__show_help(const char *format, va_list ap)
63{
64 int ret;
65 static int backlog;
66
67 pthread_mutex_lock(&ui__lock);
68 ret = vsnprintf(ui_helpline__last_msg + backlog,
69 sizeof(ui_helpline__last_msg) - backlog, format, ap);
70 backlog += ret;
71
72 if (ui_helpline__last_msg[backlog - 1] == '\n') {
73 ui_helpline__puts(ui_helpline__last_msg);
74 SLsmg_refresh();
75 backlog = 0;
76 }
77 pthread_mutex_unlock(&ui__lock);
78
79 return ret;
80}