perf ui browser: Add key_name() helper

We'll use it to show unhandled keys in the various TUI browsers.

Suggested-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/Z_TYux5fUg2pW-pF@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/ui/Build b/tools/perf/ui/Build
index d2ecd929060090f8f7a5fccdd3b6d0d1ce8a0db2..6005f813c9e3990c72f06170672fa2d794f904ca 100644 (file)
--- a/tools/perf/ui/Build
+++ b/tools/perf/ui/Build
@@ -8,5 +8,6 @@ perf-ui-y += stdio/hist.o
 CFLAGS_setup.o += -DLIBDIR="BUILD_STR($(LIBDIR))"
 
 perf-ui-$(CONFIG_SLANG) += browser.o
+perf-ui-$(CONFIG_SLANG) += keysyms.o
 perf-ui-$(CONFIG_SLANG) += browsers/
 perf-ui-$(CONFIG_SLANG) += tui/

diff --git a/tools/perf/ui/keysyms.c b/tools/perf/ui/keysyms.c
new file mode 100644 (file)
index 0000000..b64564b
--- /dev/null
+++ b/tools/perf/ui/keysyms.c
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include "keysyms.h"
+#include <linux/ctype.h>
+#include <linux/kernel.h>
+
+const char *key_name(int key, char *bf, size_t size)
+{
+       if (isprint(key)) {
+               scnprintf(bf, size, "%c", key); 
+       } else if (key < 32) {
+               scnprintf(bf, size, "Ctrl+%c", key + '@'); 
+       } else {
+               const char *name = NULL;
+
+               switch (key) {
+               case K_DOWN:    name = "Down";      break;
+               case K_END:     name = "End";       break;
+               case K_ENTER:   name = "Enter";     break;
+               case K_ESC:     name = "ESC";       break;
+               case K_F1:      name = "F1";        break;
+               case K_HOME:    name = "Home";      break;
+               case K_LEFT:    name = "Left";      break;
+               case K_PGDN:    name = "PgDown";    break;
+               case K_PGUP:    name = "PgUp";      break;
+               case K_RIGHT:   name = "Right";     break;
+               case K_TAB:     name = "Tab";       break;
+               case K_UNTAB:   name = "Untab";     break;
+               case K_UP:      name = "Up";        break;
+               case K_BKSPC:   name = "Backspace"; break;
+               case K_DEL:     name = "Del";       break;
+               default:
+                       if (key >= SL_KEY_F(1) && key <= SL_KEY_F(63))
+                               scnprintf(bf, size, "F%d", key - SL_KEY_F(0));
+                       else
+                               scnprintf(bf, size, "Unknown (%d)", key);
+               }
+
+               if (name)
+                       scnprintf(bf, size, "%s", name);
+       }
+
+       return bf;
+}

diff --git a/tools/perf/ui/keysyms.h b/tools/perf/ui/keysyms.h
index 04cc4e5c031fac49e9268c216a652d67e32d493b..969060edc3624fd1ffbb5d97f4bae0ea4e42d16e 100644 (file)
--- a/tools/perf/ui/keysyms.h
+++ b/tools/perf/ui/keysyms.h
@@ -27,4 +27,6 @@
 #define K_SWITCH_INPUT_DATA -4
 #define K_RELOAD -5
 
+const char *key_name(int key, char *bf, size_t size);
+
 #endif /* _PERF_KEYSYMS_H_ */