tools/perf/ui/helpline.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 #include "../debug.h"
   6 #include "helpline.h"
   7 #include "ui.h"
   8 #include "../util.h"
   9
  10 char ui_helpline__current[512];
  11
  12 static void nop_helpline__pop(void)
  13 {
  14 }
  15
  16 static void nop_helpline__push(const char *msg __maybe_unused)
  17 {
  18 }
  19
  20 static int nop_helpline__show(const char *fmt __maybe_unused,
  21                                va_list ap __maybe_unused)
  22 {
  23         return 0;
  24 }
  25
  26 static struct ui_helpline default_helpline_fns = {
  27         .pop    = nop_helpline__pop,
  28         .push   = nop_helpline__push,
  29         .show   = nop_helpline__show,
  30 };
  31
  32 struct ui_helpline *helpline_fns = &default_helpline_fns;
  33
  34 void ui_helpline__pop(void)
  35 {
  36         helpline_fns->pop();
  37 }
  38
  39 void ui_helpline__push(const char *msg)
  40 {
  41         helpline_fns->push(msg);
  42 }
  43
  44 void ui_helpline__vpush(const char *fmt, va_list ap)
  45 {
  46         char *s;
  47
  48         if (vasprintf(&s, fmt, ap) < 0)
  49                 vfprintf(stderr, fmt, ap);
  50         else {
  51                 ui_helpline__push(s);
  52                 free(s);
  53         }
  54 }
  55
  56 void ui_helpline__fpush(const char *fmt, ...)
  57 {
  58         va_list ap;
  59
  60         va_start(ap, fmt);
  61         ui_helpline__vpush(fmt, ap);
  62         va_end(ap);
  63 }
  64
  65 void ui_helpline__puts(const char *msg)
  66 {
  67         ui_helpline__pop();
  68         ui_helpline__push(msg);
  69 }
  70
  71 int ui_helpline__vshow(const char *fmt, va_list ap)
  72 {
  73         return helpline_fns->show(fmt, ap);
  74 }