add program to generate keys.h

Signed-off-by: Leonardo Hernández Hernández <leohdz172@proton.me>

generate-keys.c

@@ -0,0 +1,95 @@
+/******************************************************************
+ * Copyright 2023-2024 Leonardo Hernández Hernández
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the “Software”), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+ * OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ ******************************************************************/
+
+/* cc -lxkbcommon -o generate-keys generate-keys.c */
+
+#define _DEFAULT_SOURCE
+
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <unistd.h>
+
+#include <xkbcommon/xkbcommon.h>
+
+int
+main(void)
+{
+	/* Allow generate keys with a different layout and variant.
+	 * You can also use XKB_DEFAULT_* environmental variables and let this as is */
+	struct xkb_rule_names rules = {
+		0
+	};
+	struct xkb_context *context = NULL;
+	struct xkb_keymap *keymap = NULL;
+	xkb_keycode_t keycode, min_keycode, max_keycode;
+	xkb_layout_index_t layout, num_layouts;
+	xkb_level_index_t level, num_levels;
+	int i, nsyms;
+	const xkb_keysym_t *syms;
+	char keyname[64];
+	bool ok = false;
+	FILE *file = fopen("keys.h", "w");
+	if (!file) {
+		perror("Couldn't open keys.h");
+		return EXIT_FAILURE;
+	}
+
+	if (!(context = xkb_context_new(XKB_CONTEXT_NO_FLAGS))) {
+		fputs("Couldn't create xkbcommon context\n", stderr);
+		goto out;
+	}
+
+	if (!(keymap = xkb_keymap_new_from_names(context, &rules,
+			XKB_KEYMAP_COMPILE_NO_FLAGS))) {
+		fputs("Couldn't create xkbcommon keymap\n", stderr);
+		goto out;
+	}
+
+	min_keycode = xkb_keymap_min_keycode(keymap);
+	max_keycode = xkb_keymap_max_keycode(keymap);
+
+	for (keycode = min_keycode; keycode <= max_keycode; keycode++) {
+		num_layouts = xkb_keymap_num_layouts_for_key(keymap, keycode);
+		for (layout = 0; layout < num_layouts; layout++) {
+			num_levels = xkb_keymap_num_levels_for_key(keymap, keycode, layout);
+			for (level = 0; level < num_levels; level++) {
+				nsyms = xkb_keymap_key_get_syms_by_level(keymap, keycode, layout, level, &syms);
+				for (i = 0; i < nsyms; i++) {
+					xkb_keysym_get_name(syms[i], keyname, sizeof(keyname) / sizeof(keyname[0]));
+					fprintf(file, "#define Key_%-27s %#05"PRIx32"\n", keyname, keycode);
+				}
+			}
+		}
+	}
+
+	ok = true;
+	sync();
+
+out:
+	fclose(file);
+	xkb_keymap_unref(keymap);
+	xkb_context_unref(context);
+	return !ok;
+}