63 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <stdio.h>3#include <stdlib.h>4#include <string.h>5#include <linux/kernel.h>6#include <linux/string.h>7 8#include "../helpline.h"9#include "../ui.h"10#include "../libslang.h"11 12char ui_helpline__last_msg[1024];13bool tui_helpline__set;14 15static void tui_helpline__pop(void)16{17}18 19static void tui_helpline__push(const char *msg)20{21 const size_t sz = sizeof(ui_helpline__current);22 23 SLsmg_gotorc(SLtt_Screen_Rows - 1, 0);24 SLsmg_set_color(0);25 SLsmg_write_nstring(msg, SLtt_Screen_Cols);26 SLsmg_refresh();27 strlcpy(ui_helpline__current, msg, sz);28}29 30static int tui_helpline__show(const char *format, va_list ap)31{32 int ret;33 static int backlog;34 35 mutex_lock(&ui__lock);36 ret = vscnprintf(ui_helpline__last_msg + backlog,37 sizeof(ui_helpline__last_msg) - backlog, format, ap);38 backlog += ret;39 40 tui_helpline__set = true;41 42 if (ui_helpline__last_msg[backlog - 1] == '\n') {43 ui_helpline__puts(ui_helpline__last_msg);44 SLsmg_refresh();45 backlog = 0;46 }47 mutex_unlock(&ui__lock);48 49 return ret;50}51 52struct ui_helpline tui_helpline_fns = {53 .pop = tui_helpline__pop,54 .push = tui_helpline__push,55 .show = tui_helpline__show,56};57 58void ui_helpline__init(void)59{60 helpline_fns = &tui_helpline_fns;61 ui_helpline__puts(" ");62}63