treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / tools / perf / ui / gtk / helpline.c
blobe40a006aead87b9b0a869ac1409bea69fafc6c12
1 // SPDX-License-Identifier: GPL-2.0
2 #include <stdio.h>
3 #include <string.h>
4 #include <linux/kernel.h>
6 #include "gtk.h"
7 #include "../ui.h"
8 #include "../helpline.h"
10 static void gtk_helpline_pop(void)
12 if (!perf_gtk__is_active_context(pgctx))
13 return;
15 gtk_statusbar_pop(GTK_STATUSBAR(pgctx->statbar),
16 pgctx->statbar_ctx_id);
19 static void gtk_helpline_push(const char *msg)
21 if (!perf_gtk__is_active_context(pgctx))
22 return;
24 gtk_statusbar_push(GTK_STATUSBAR(pgctx->statbar),
25 pgctx->statbar_ctx_id, msg);
28 static int gtk_helpline_show(const char *fmt, va_list ap)
30 int ret;
31 char *ptr;
32 static int backlog;
34 ret = vscnprintf(ui_helpline__current + backlog,
35 sizeof(ui_helpline__current) - backlog, fmt, ap);
36 backlog += ret;
38 /* only first line can be displayed */
39 ptr = strchr(ui_helpline__current, '\n');
40 if (ptr && (ptr - ui_helpline__current) <= backlog) {
41 *ptr = '\0';
42 ui_helpline__puts(ui_helpline__current);
43 backlog = 0;
46 return ret;
49 static struct ui_helpline gtk_helpline_fns = {
50 .pop = gtk_helpline_pop,
51 .push = gtk_helpline_push,
52 .show = gtk_helpline_show,
55 void perf_gtk__init_helpline(void)
57 helpline_fns = &gtk_helpline_fns;