linux_dsm_epyc7002/tools/perf/util/ui/helpline.c
Arnaldo Carvalho de Melo 59e8fe32fc perf ui browser: Add ui_browser__show counterpart: __hide
So that the common tasks of providing a helpline at __run entry and
destroying the window and releasing resourses at exit can be abstracted
away, reducing a bit more the coupling with libnewt.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2010-08-10 15:44:20 -03:00

70 lines
1.1 KiB
C

#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <newt.h>
#include "../debug.h"
#include "helpline.h"
void ui_helpline__pop(void)
{
newtPopHelpLine();
}
void ui_helpline__push(const char *msg)
{
newtPushHelpLine(msg);
}
void ui_helpline__vpush(const char *fmt, va_list ap)
{
char *s;
if (vasprintf(&s, fmt, ap) < 0)
vfprintf(stderr, fmt, ap);
else {
ui_helpline__push(s);
free(s);
}
}
void ui_helpline__fpush(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
ui_helpline__vpush(fmt, ap);
va_end(ap);
}
void ui_helpline__puts(const char *msg)
{
ui_helpline__pop();
ui_helpline__push(msg);
}
void ui_helpline__init(void)
{
ui_helpline__puts(" ");
}
char ui_helpline__last_msg[1024];
int ui_helpline__show_help(const char *format, va_list ap)
{
int ret;
static int backlog;
ret = vsnprintf(ui_helpline__last_msg + backlog,
sizeof(ui_helpline__last_msg) - backlog, format, ap);
backlog += ret;
if (ui_helpline__last_msg[backlog - 1] == '\n') {
ui_helpline__puts(ui_helpline__last_msg);
newtRefresh();
backlog = 0;
}
return ret;
}