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Linux/tools/perf/ui/helpline.c

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

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