LXR linux/tools/perf/util/ui/helpline.c

   1#define _GNU_SOURCE
   2#include <stdio.h>
   3#include <stdlib.h>
   4#include <newt.h>
   5
   6#include "../debug.h"
   7#include "helpline.h"
   8
   9void ui_helpline__pop(void)
  10{
  11        newtPopHelpLine();
  12}
  13
  14void ui_helpline__push(const char *msg)
  15{
  16        newtPushHelpLine(msg);
  17}
  18
  19void ui_helpline__vpush(const char *fmt, va_list ap)
  20{
  21        char *s;
  22
  23        if (vasprintf(&s, fmt, ap) < 0)
  24                vfprintf(stderr, fmt, ap);
  25        else {
  26                ui_helpline__push(s);
  27                free(s);
  28        }
  29}
  30
  31void ui_helpline__fpush(const char *fmt, ...)
  32{
  33        va_list ap;
  34
  35        va_start(ap, fmt);
  36        ui_helpline__vpush(fmt, ap);
  37        va_end(ap);
  38}
  39
  40void ui_helpline__puts(const char *msg)
  41{
  42        ui_helpline__pop();
  43        ui_helpline__push(msg);
  44}
  45
  46void ui_helpline__init(void)
  47{
  48        ui_helpline__puts(" ");
  49}
  50
  51char ui_helpline__last_msg[1024];
  52
  53int ui_helpline__show_help(const char *format, va_list ap)
  54{
  55        int ret;
  56        static int backlog;
  57
  58        ret = vsnprintf(ui_helpline__last_msg + backlog,
  59                        sizeof(ui_helpline__last_msg) - backlog, format, ap);
  60        backlog += ret;
  61
  62        if (ui_helpline__last_msg[backlog - 1] == '\n') {
  63                ui_helpline__puts(ui_helpline__last_msg);
  64                newtRefresh();
  65                backlog = 0;
  66        }
  67
  68        return ret;
  69}
  70