helpline.c (1302B)
1// SPDX-License-Identifier: GPL-2.0 2#include <stdio.h> 3#include <stdlib.h> 4#include <string.h> 5#include <pthread.h> 6#include <linux/kernel.h> 7#include <linux/string.h> 8 9#include "../helpline.h" 10#include "../ui.h" 11#include "../libslang.h" 12 13char ui_helpline__last_msg[1024]; 14bool tui_helpline__set; 15 16static void tui_helpline__pop(void) 17{ 18} 19 20static void tui_helpline__push(const char *msg) 21{ 22 const size_t sz = sizeof(ui_helpline__current); 23 24 SLsmg_gotorc(SLtt_Screen_Rows - 1, 0); 25 SLsmg_set_color(0); 26 SLsmg_write_nstring((char *)msg, SLtt_Screen_Cols); 27 SLsmg_refresh(); 28 strlcpy(ui_helpline__current, msg, sz); 29} 30 31static int tui_helpline__show(const char *format, va_list ap) 32{ 33 int ret; 34 static int backlog; 35 36 pthread_mutex_lock(&ui__lock); 37 ret = vscnprintf(ui_helpline__last_msg + backlog, 38 sizeof(ui_helpline__last_msg) - backlog, format, ap); 39 backlog += ret; 40 41 tui_helpline__set = true; 42 43 if (ui_helpline__last_msg[backlog - 1] == '\n') { 44 ui_helpline__puts(ui_helpline__last_msg); 45 SLsmg_refresh(); 46 backlog = 0; 47 } 48 pthread_mutex_unlock(&ui__lock); 49 50 return ret; 51} 52 53struct ui_helpline tui_helpline_fns = { 54 .pop = tui_helpline__pop, 55 .push = tui_helpline__push, 56 .show = tui_helpline__show, 57}; 58 59void ui_helpline__init(void) 60{ 61 helpline_fns = &tui_helpline_fns; 62 ui_helpline__puts(" "); 63}