From dcbf09631f9a10323a0c483e15df7c32d9203677 Mon Sep 17 00:00:00 2001
From: "Lukas F. Hartmann" <lukas@mntre.com>
Date: Thu, 9 May 2024 21:29:40 +0200
Subject: [PATCH] implement console based keyboard tester

---
 pref-kbd-test/pref-kbd-test.c | 153 ++++++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 pref-kbd-test/pref-kbd-test.c

diff --git a/pref-kbd-test/pref-kbd-test.c b/pref-kbd-test/pref-kbd-test.c
new file mode 100644
index 0000000..cb116c1
--- /dev/null
+++ b/pref-kbd-test/pref-kbd-test.c
@@ -0,0 +1,153 @@
+#include <stdio.h>
+#include <fcntl.h>
+#include <linux/input.h>
+#include <unistd.h>
+#include <signal.h>
+#include <stdlib.h>
+
+void cleanup() {
+}
+
+void handle_sigint() {
+	exit(0);
+}
+
+typedef struct pref_key {
+	char label[5];
+	int code;
+	int det;
+} pref_key;
+
+typedef struct pref_row {
+	int num_keys;
+	pref_key keys[12];
+} pref_row;
+
+#define NUM_R 5
+pref_row ROWS[NUM_R] = {
+	{
+		12, {
+			{ "ESC", 1 },
+			{ "1", 2 },
+			{ "2", 3 },
+			{ "3", 4 },
+			{ "4", 5 },
+			{ "5", 6 },
+			{ "6", 7 },
+			{ "7", 8 },
+			{ "8", 9 },
+			{ "9", 10 },
+			{ "0", 11 },
+			{ "BSP", 14 },
+		}
+	},
+	{
+		12, {
+			{ "TAB", 15 },
+			{ "Q", 16 },
+			{ "W", 17 },
+			{ "E", 18 },
+			{ "R", 19 },
+			{ "T", 20 },
+			{ "Y", 21 },
+			{ "U", 22 },
+			{ "I", 23 },
+			{ "O", 24 },
+			{ "P", 25 },
+			{ ";", 39 },
+		}
+	},
+	{
+		12, {
+			{ "CTL", 29 },
+			{ "A", 30 },
+			{ "S", 31 },
+			{ "D", 32 },
+			{ "F", 33 },
+			{ "G", 34 },
+			{ "H", 35 },
+			{ "J", 36 },
+			{ "K", 37 },
+			{ "L", 38 },
+			{ "'", 40 },
+			{ "RET", 28 },
+		}
+	},
+	{
+		12, {
+			{ "LSH", 42 },
+			{ "Z", 44 },
+			{ "X", 45 },
+			{ "C", 46 },
+			{ "V", 47 },
+			{ "B", 48 },
+			{ "N", 49 },
+			{ "M", 50 },
+			{ ",", 51 },
+			{ ".", 52 },
+			{ "UP",  103},
+			{ "AGR", 100 },
+		}
+	},
+	{
+		12, {
+			{ "", 0 },
+			{ "MNT", 125 },
+			{ "ALT", 56 },
+			{ "\\", 43 },
+			{ "=", 13 },
+			{ "SPC", 57 },
+			{ "SPC", 57 },
+			{ "-", 12 },
+			{ "/", 53 },
+			{ "LFT", 105 },
+			{ "DWN", 108 },
+			{ "RGT", 106 },
+		}
+	},
+};
+
+int main(int argc, char** argv) {
+	atexit(cleanup);
+	signal(SIGINT, handle_sigint);
+
+	if (argc < 2) exit(1);
+	int dev = open(argv[1], O_RDONLY);
+	if (!dev) exit(2);
+
+	struct input_event e;
+
+	while (1) {
+		puts("\x1B[2J");
+		int alldet = 1;
+		for (int y=0; y<NUM_R; y++) {
+			for (int x=0; x<ROWS[y].num_keys; x++) {
+				pref_key* k = &ROWS[y].keys[x];
+				if (k->det == 1) {
+					printf("    ");
+				} else {
+					printf("%3s ", k->label);
+					alldet = 0;
+				}
+			}
+			printf("\n");
+		}
+		printf("\n");
+
+		if (alldet) break;
+
+		read(dev, &e, sizeof(e));
+		if (e.type == 1) {
+			//printf("code: %d value: %d\n", e.code, e.value);
+			for (int y=0; y<NUM_R; y++) {
+				for (int x=0; x<ROWS[y].num_keys; x++) {
+					if (ROWS[y].keys[x].code == e.code) {
+						ROWS[y].keys[x].det = 1;
+					}
+				}
+			}
+		}
+	}
+
+	return 0;
+}