tools/perf/ui/tui/helpline.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <pthread.h>
   5
   6 #include "../../util/debug.h"
   7 #include "../helpline.h"
   8 #include "../ui.h"
   9 #include "../libslang.h"
  10
  11 char ui_helpline__last_msg[1024];
  12
  13 static void tui_helpline__pop(void)
  14 {
  15 }
  16
  17 static void tui_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
  28 static int tui_helpline__show(const char *format, va_list ap)
  29 {
  30         int ret;
  31         static int backlog;
  32
  33         pthread_mutex_lock(&ui__lock);
  34         ret = vscnprintf(ui_helpline__last_msg + backlog,
  35                         sizeof(ui_helpline__last_msg) - backlog, format, ap);
  36         backlog += ret;
  37
  38         if (ui_helpline__last_msg[backlog - 1] == '\n') {
  39                 ui_helpline__puts(ui_helpline__last_msg);
  40                 SLsmg_refresh();
  41                 backlog = 0;
  42         }
  43         pthread_mutex_unlock(&ui__lock);
  44
  45         return ret;
  46 }
  47
  48 struct ui_helpline tui_helpline_fns = {
  49         .pop    = tui_helpline__pop,
  50         .push   = tui_helpline__push,
  51         .show   = tui_helpline__show,
  52 };
  53
  54 void ui_helpline__init(void)
  55 {
  56         helpline_fns = &tui_helpline_fns;
  57         ui_helpline__puts(" ");
  58 }