/* 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;
}