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diff --git a/quantum/keycode_string.c b/quantum/keycode_string.c
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+// Copyright 2024-2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "keycode_string.h"
+
+#include <string.h>
+#include "bitwise.h"
+#include "keycode.h"
+#include "progmem.h"
+#include "quantum_keycodes.h"
+#include "util.h"
+
+typedef int_fast8_t index_t;
+
+// clang-format off
+/** Packs a 7-char keycode name, ignoring the third char, as 3 words. */
+#define KEYCODE_NAME7(c0, c1, unused_c2, c3, c4, c5, c6) \
+ ((uint16_t)c0) | (((uint16_t)c1) << 8), \
+ ((uint16_t)c3) | (((uint16_t)c4) << 8), \
+ ((uint16_t)c5) | (((uint16_t)c6) << 8)
+
+/**
+ * @brief Names of some common keycodes.
+ *
+ * Each (keycode, name) entry is stored flat in 8 bytes in PROGMEM. Names in
+ * this table must be at most 7 chars long and have an underscore '_' for the
+ * third char. This underscore is assumed and not actually stored.
+ *
+ * To save memory, feature-specific key entries are ifdef'd to include them only
+ * when their feature is enabled.
+ */
+static const uint16_t common_names[] PROGMEM = {
+ KC_TRNS, KEYCODE_NAME7('K', 'C', '_', 'T', 'R', 'N', 'S'),
+ KC_ENT , KEYCODE_NAME7('K', 'C', '_', 'E', 'N', 'T', 0 ),
+ KC_ESC , KEYCODE_NAME7('K', 'C', '_', 'E', 'S', 'C', 0 ),
+ KC_BSPC, KEYCODE_NAME7('K', 'C', '_', 'B', 'S', 'P', 'C'),
+ KC_TAB , KEYCODE_NAME7('K', 'C', '_', 'T', 'A', 'B', 0 ),
+ KC_SPC , KEYCODE_NAME7('K', 'C', '_', 'S', 'P', 'C', 0 ),
+ KC_MINS, KEYCODE_NAME7('K', 'C', '_', 'M', 'I', 'N', 'S'),
+ KC_EQL , KEYCODE_NAME7('K', 'C', '_', 'E', 'Q', 'L', 0 ),
+ KC_LBRC, KEYCODE_NAME7('K', 'C', '_', 'L', 'B', 'R', 'C'),
+ KC_RBRC, KEYCODE_NAME7('K', 'C', '_', 'R', 'B', 'R', 'C'),
+ KC_BSLS, KEYCODE_NAME7('K', 'C', '_', 'B', 'S', 'L', 'S'),
+ KC_NUHS, KEYCODE_NAME7('K', 'C', '_', 'N', 'U', 'H', 'S'),
+ KC_SCLN, KEYCODE_NAME7('K', 'C', '_', 'S', 'C', 'L', 'N'),
+ KC_QUOT, KEYCODE_NAME7('K', 'C', '_', 'Q', 'U', 'O', 'T'),
+ KC_GRV , KEYCODE_NAME7('K', 'C', '_', 'G', 'R', 'V', 0 ),
+ KC_COMM, KEYCODE_NAME7('K', 'C', '_', 'C', 'O', 'M', 'M'),
+ KC_DOT , KEYCODE_NAME7('K', 'C', '_', 'D', 'O', 'T', 0 ),
+ KC_SLSH, KEYCODE_NAME7('K', 'C', '_', 'S', 'L', 'S', 'H'),
+ KC_CAPS, KEYCODE_NAME7('K', 'C', '_', 'C', 'A', 'P', 'S'),
+ KC_PSCR, KEYCODE_NAME7('K', 'C', '_', 'P', 'S', 'C', 'R'),
+ KC_PAUS, KEYCODE_NAME7('K', 'C', '_', 'P', 'A', 'U', 'S'),
+ KC_INS , KEYCODE_NAME7('K', 'C', '_', 'I', 'N', 'S', 0 ),
+ KC_HOME, KEYCODE_NAME7('K', 'C', '_', 'H', 'O', 'M', 'E'),
+ KC_PGUP, KEYCODE_NAME7('K', 'C', '_', 'P', 'G', 'U', 'P'),
+ KC_DEL , KEYCODE_NAME7('K', 'C', '_', 'D', 'E', 'L', 0 ),
+ KC_END , KEYCODE_NAME7('K', 'C', '_', 'E', 'N', 'D', 0 ),
+ KC_PGDN, KEYCODE_NAME7('K', 'C', '_', 'P', 'G', 'D', 'N'),
+ KC_RGHT, KEYCODE_NAME7('K', 'C', '_', 'R', 'G', 'H', 'T'),
+ KC_LEFT, KEYCODE_NAME7('K', 'C', '_', 'L', 'E', 'F', 'T'),
+ KC_DOWN, KEYCODE_NAME7('K', 'C', '_', 'D', 'O', 'W', 'N'),
+ KC_UP , KEYCODE_NAME7('K', 'C', '_', 'U', 'P', 0 , 0 ),
+ KC_NUBS, KEYCODE_NAME7('K', 'C', '_', 'N', 'U', 'B', 'S'),
+ KC_HYPR, KEYCODE_NAME7('K', 'C', '_', 'H', 'Y', 'P', 'R'),
+ KC_MEH , KEYCODE_NAME7('K', 'C', '_', 'M', 'E', 'H', 0 ),
+#ifdef EXTRAKEY_ENABLE
+ KC_WHOM, KEYCODE_NAME7('K', 'C', '_', 'W', 'H', 'O', 'M'),
+ KC_WBAK, KEYCODE_NAME7('K', 'C', '_', 'W', 'B', 'A', 'K'),
+ KC_WFWD, KEYCODE_NAME7('K', 'C', '_', 'W', 'F', 'W', 'D'),
+ KC_WSTP, KEYCODE_NAME7('K', 'C', '_', 'W', 'S', 'T', 'P'),
+ KC_WREF, KEYCODE_NAME7('K', 'C', '_', 'W', 'R', 'E', 'F'),
+ KC_MNXT, KEYCODE_NAME7('K', 'C', '_', 'M', 'N', 'X', 'T'),
+ KC_MPRV, KEYCODE_NAME7('K', 'C', '_', 'M', 'P', 'R', 'V'),
+ KC_MPLY, KEYCODE_NAME7('K', 'C', '_', 'M', 'P', 'L', 'Y'),
+ KC_MUTE, KEYCODE_NAME7('K', 'C', '_', 'M', 'U', 'T', 'E'),
+ KC_VOLU, KEYCODE_NAME7('K', 'C', '_', 'V', 'O', 'L', 'U'),
+ KC_VOLD, KEYCODE_NAME7('K', 'C', '_', 'V', 'O', 'L', 'D'),
+#endif // EXTRAKEY_ENABLE
+#ifdef MOUSEKEY_ENABLE
+ MS_LEFT, KEYCODE_NAME7('M', 'S', '_', 'L', 'E', 'F', 'T'),
+ MS_RGHT, KEYCODE_NAME7('M', 'S', '_', 'R', 'G', 'H', 'T'),
+ MS_UP , KEYCODE_NAME7('M', 'S', '_', 'U', 'P', 0 , 0 ),
+ MS_DOWN, KEYCODE_NAME7('M', 'S', '_', 'D', 'O', 'W', 'N'),
+ MS_WHLL, KEYCODE_NAME7('M', 'S', '_', 'W', 'H', 'L', 'L'),
+ MS_WHLR, KEYCODE_NAME7('M', 'S', '_', 'W', 'H', 'L', 'R'),
+ MS_WHLU, KEYCODE_NAME7('M', 'S', '_', 'W', 'H', 'L', 'U'),
+ MS_WHLD, KEYCODE_NAME7('M', 'S', '_', 'W', 'H', 'L', 'D'),
+#endif // MOUSEKEY_ENABLE
+#ifdef SWAP_HANDS_ENABLE
+ SH_ON , KEYCODE_NAME7('S', 'H', '_', 'O', 'N', 0 , 0 ),
+ SH_OFF , KEYCODE_NAME7('S', 'H', '_', 'O', 'F', 'F', 0 ),
+ SH_MON , KEYCODE_NAME7('S', 'H', '_', 'M', 'O', 'N', 0 ),
+ SH_MOFF, KEYCODE_NAME7('S', 'H', '_', 'M', 'O', 'F', 'F'),
+ SH_TOGG, KEYCODE_NAME7('S', 'H', '_', 'T', 'O', 'G', 'G'),
+ SH_TT , KEYCODE_NAME7('S', 'H', '_', 'T', 'T', 0 , 0 ),
+# if !defined(NO_ACTION_ONESHOT)
+ SH_OS , KEYCODE_NAME7('S', 'H', '_', 'O', 'S', 0 , 0 ),
+# endif // !defined(NO_ACTION_ONESHOT)
+#endif // SWAP_HANDS_ENABLE
+#ifdef LEADER_ENABLE
+ QK_LEAD, KEYCODE_NAME7('Q', 'K', '_', 'L', 'E', 'A', 'D'),
+#endif // LEADER_ENABLE
+#ifdef KEY_LOCK_ENABLE
+ QK_LOCK, KEYCODE_NAME7('Q', 'K', '_', 'L', 'O', 'C', 'K'),
+#endif // KEY_LOCK_ENABLE
+#ifdef TRI_LAYER_ENABLE
+ TL_LOWR, KEYCODE_NAME7('T', 'L', '_', 'L', 'O', 'W', 'R'),
+ TL_UPPR, KEYCODE_NAME7('T', 'L', '_', 'U', 'P', 'P', 'R'),
+#endif // TRI_LAYER_ENABLE
+#ifdef GRAVE_ESC_ENABLE
+ QK_GESC, KEYCODE_NAME7('Q', 'K', '_', 'G', 'E', 'S', 'C'),
+#endif // GRAVE_ESC_ENABLE
+#ifdef CAPS_WORD_ENABLE
+ CW_TOGG, KEYCODE_NAME7('C', 'W', '_', 'T', 'O', 'G', 'G'),
+#endif // CAPS_WORD_ENABLE
+#ifdef SECURE_ENABLE
+ SE_LOCK, KEYCODE_NAME7('S', 'E', '_', 'L', 'O', 'C', 'K'),
+ SE_UNLK, KEYCODE_NAME7('S', 'E', '_', 'U', 'N', 'L', 'K'),
+ SE_TOGG, KEYCODE_NAME7('S', 'E', '_', 'T', 'O', 'G', 'G'),
+ SE_REQ , KEYCODE_NAME7('S', 'E', '_', 'R', 'E', 'Q', 0 ),
+#endif // SECURE_ENABLE
+#ifdef LAYER_LOCK_ENABLE
+ QK_LLCK, KEYCODE_NAME7('Q', 'K', '_', 'L', 'L', 'C', 'K'),
+#endif // LAYER_LOCK_ENABLE
+ EE_CLR , KEYCODE_NAME7('E', 'E', '_', 'C', 'L', 'R', 0 ),
+ QK_BOOT, KEYCODE_NAME7('Q', 'K', '_', 'B', 'O', 'O', 'T'),
+ DB_TOGG, KEYCODE_NAME7('D', 'B', '_', 'T', 'O', 'G', 'G'),
+};
+// clang-format on
+
+/** Users can override this to define names of additional keycodes. */
+__attribute__((weak)) const keycode_string_name_t* keycode_string_names_data_user = NULL;
+__attribute__((weak)) uint16_t keycode_string_names_size_user = 0;
+/** Keyboard vendors can override this to define names of additional keycodes. */
+__attribute__((weak)) const keycode_string_name_t* keycode_string_names_data_kb = NULL;
+__attribute__((weak)) uint16_t keycode_string_names_size_kb = 0;
+/** Names of the 4 mods on each hand. */
+static const char mod_names[] PROGMEM = "CTL\0SFT\0ALT\0GUI";
+/** Internal buffer for holding a stringified keycode. */
+static char buffer[32];
+#define BUFFER_MAX_LEN (sizeof(buffer) - 1)
+static index_t buffer_len;
+
+/** Finds the name of a keycode in `common_names` or returns NULL. */
+static const char* search_common_names(uint16_t keycode) {
+ static uint8_t buffer[8];
+
+ for (int_fast16_t offset = 0; offset < ARRAY_SIZE(common_names); offset += 4) {
+ if (keycode == pgm_read_word(common_names + offset)) {
+ const uint16_t w0 = pgm_read_word(common_names + offset + 1);
+ const uint16_t w1 = pgm_read_word(common_names + offset + 2);
+ const uint16_t w2 = pgm_read_word(common_names + offset + 3);
+ buffer[0] = (uint8_t)w0;
+ buffer[1] = (uint8_t)(w0 >> 8);
+ buffer[2] = '_';
+ buffer[3] = (uint8_t)w1;
+ buffer[4] = (uint8_t)(w1 >> 8);
+ buffer[5] = (uint8_t)w2;
+ buffer[6] = (uint8_t)(w2 >> 8);
+ buffer[7] = 0;
+ return (const char*)buffer;
+ }
+ }
+
+ return NULL;
+}
+
+/**
+ * @brief Finds the name of a keycode in table or returns NULL.
+ *
+ * @param data Pointer to table to be searched.
+ * @param size Numer of entries in the table.
+ * @return Name string for the keycode, or NULL if not found.
+ */
+static const char* search_table(const keycode_string_name_t* data, uint16_t size, uint16_t keycode) {
+ if (data != NULL) {
+ for (uint16_t i = 0; i < size; ++i) {
+ if (data[i].keycode == keycode) {
+ return data[i].name;
+ }
+ }
+ }
+ return NULL;
+}
+
+/** Formats `number` in `base`, either 10 or 16. */
+static char* number_string(uint16_t number, int8_t base) {
+ static char result[7];
+ result[sizeof(result) - 1] = '\0';
+ index_t i = sizeof(result) - 1;
+ do {
+ const uint8_t digit = number % base;
+ number /= base;
+ result[--i] = (digit < 10) ? (char)(digit + UINT8_C('0')) : (char)(digit + (UINT8_C('A') - 10));
+ } while (number > 0 && i > 0);
+
+ if (base == 16 && i >= 2) {
+ result[--i] = 'x';
+ result[--i] = '0';
+ }
+ return result + i;
+}
+
+/** Appends `str` to `buffer`, truncating if the result would overflow. */
+static void append(const char* str) {
+ char* dest = buffer + buffer_len;
+ index_t i;
+ for (i = 0; buffer_len + i < BUFFER_MAX_LEN && str[i]; ++i) {
+ dest[i] = str[i];
+ }
+ buffer_len += i;
+ buffer[buffer_len] = '\0';
+}
+
+/** Same as append(), but where `str` is a PROGMEM string. */
+static void append_P(const char* str) {
+ char* dest = buffer + buffer_len;
+ index_t i;
+ for (i = 0; buffer_len + i < BUFFER_MAX_LEN; ++i) {
+ const char c = pgm_read_byte(&str[i]);
+ if (c == '\0') {
+ break;
+ }
+ dest[i] = c;
+ }
+ buffer_len += i;
+ buffer[buffer_len] = '\0';
+}
+
+/** Appends a single char to `buffer` if there is space. */
+static void append_char(char c) {
+ if (buffer_len < BUFFER_MAX_LEN) {
+ buffer[buffer_len] = c;
+ buffer[++buffer_len] = '\0';
+ }
+}
+
+/** Formats `number` in `base`, either 10 or 16, and appends it to `buffer`. */
+static void append_number(uint16_t number, int8_t base) {
+ append(number_string(number, base));
+}
+
+/** Stringifies 5-bit mods and appends it to `buffer`. */
+static void append_5_bit_mods(uint8_t mods) {
+ const bool is_rhs = mods > 15;
+ const uint8_t csag = mods & 15;
+ if (csag != 0 && (csag & (csag - 1)) == 0) { // One mod is set.
+ append_P(PSTR("MOD_"));
+ append_char(is_rhs ? 'R' : 'L');
+ append_P(&mod_names[4 * biton(csag)]);
+ } else { // Fallback: write the mod as a hex value.
+ append_number(mods, 16);
+ }
+}
+
+/**
+ * @brief Writes a keycode of the format `name` + "(" + `param` + ")".
+ * @note `name` is a PROGMEM string, `param` is not.
+ */
+static void append_unary_keycode(const char* name, const char* param) {
+ append_P(name);
+ append_char('(');
+ append(param);
+ append_char(')');
+}
+
+/**
+ * @brief Writes a keycode of the format `name` + `number`.
+ * @note `name` is a PROGMEM string.
+ */
+static void append_numbered_keycode(const char* name, uint16_t number) {
+ append_P(name);
+ append_number(number, 10);
+}
+
+/** Stringifies `keycode` and appends it to `buffer`. */
+static void append_keycode(uint16_t keycode) {
+ // In case there is overlap among tables, search `keycode_string_names_user`
+ // first so that it takes precedence.
+ const char* keycode_name = search_table(keycode_string_names_data_user, keycode_string_names_size_user, keycode);
+ if (keycode_name) {
+ append(keycode_name);
+ return;
+ }
+ keycode_name = search_table(keycode_string_names_data_kb, keycode_string_names_size_kb, keycode);
+ if (keycode_name) {
+ append(keycode_name);
+ return;
+ }
+ keycode_name = search_common_names(keycode);
+ if (keycode_name) {
+ append(keycode_name);
+ return;
+ }
+
+ if (keycode <= 255) { // Basic keycodes.
+ switch (keycode) {
+ // Modifiers KC_LSFT, KC_RCTL, etc.
+ case MODIFIER_KEYCODE_RANGE: {
+ const uint8_t i = keycode - KC_LCTL;
+ const bool is_rhs = i > 3;
+ append_P(PSTR("KC_"));
+ append_char(is_rhs ? 'R' : 'L');
+ append_P(&mod_names[4 * (i & 3)]);
+ }
+ return;
+
+ // Letters A-Z.
+ case KC_A ... KC_Z:
+ append_P(PSTR("KC_"));
+ append_char((char)(keycode + (UINT8_C('A') - KC_A)));
+ return;
+
+ // Digits 0-9 (NOTE: Unlike the ASCII order, KC_0 comes *after* KC_9.)
+ case KC_1 ... KC_0:
+ append_numbered_keycode(PSTR("KC_"), (keycode - (KC_1 - 1)) % 10);
+ return;
+
+ // Keypad digits.
+ case KC_KP_1 ... KC_KP_0:
+ append_numbered_keycode(PSTR("KC_KP_"), (keycode - (KC_KP_1 - 1)) % 10);
+ return;
+
+ // Function keys. F1-F12 and F13-F24 are coded in separate ranges.
+ case KC_F1 ... KC_F12:
+ append_numbered_keycode(PSTR("KC_F"), keycode - (KC_F1 - 1));
+ return;
+
+ case KC_F13 ... KC_F24:
+ append_numbered_keycode(PSTR("KC_F"), keycode - (KC_F13 - 13));
+ return;
+ }
+ }
+
+ // clang-format off
+ switch (keycode) {
+ // A modified keycode, like S(KC_1) for Shift + 1 = !. This implementation
+ // only covers modified keycodes where one modifier is applied, e.g. a
+ // Ctrl + Shift + kc or Hyper + kc keycode is not formatted.
+ case QK_MODS ... QK_MODS_MAX: {
+ uint8_t mods = QK_MODS_GET_MODS(keycode);
+ const bool is_rhs = mods > 15;
+ mods &= 15;
+ if (mods != 0 && (mods & (mods - 1)) == 0) { // One mod is set.
+ const char* name = &mod_names[4 * biton(mods)];
+ if (is_rhs) {
+ append_char('R');
+ append_P(name);
+ } else {
+ append_char(pgm_read_byte(&name[0]));
+ }
+ append_char('(');
+ append_keycode(QK_MODS_GET_BASIC_KEYCODE(keycode));
+ append_char(')');
+ return;
+ }
+ } break;
+
+#if !defined(NO_ACTION_ONESHOT)
+ case QK_ONE_SHOT_MOD ... QK_ONE_SHOT_MOD_MAX: // One-shot mod OSM(mod) key.
+ append_P(PSTR("OSM("));
+ append_5_bit_mods(QK_ONE_SHOT_MOD_GET_MODS(keycode));
+ append_char(')');
+ return;
+#endif // !defined(NO_ACTION_ONESHOT)
+
+ // Various layer switch keys.
+ case QK_LAYER_TAP ... QK_LAYER_TAP_MAX: // Layer-tap LT(layer,kc) key.
+ append_P(PSTR("LT("));
+ append_number(QK_LAYER_TAP_GET_LAYER(keycode), 10);
+ append_char(',');
+ append_keycode(QK_LAYER_TAP_GET_TAP_KEYCODE(keycode));
+ append_char(')');
+ return;
+
+ case QK_LAYER_MOD ... QK_LAYER_MOD_MAX: // LM(layer,mod) key.
+ append_P(PSTR("LM("));
+ append_number(QK_LAYER_MOD_GET_LAYER(keycode), 10);
+ append_char(',');
+ append_5_bit_mods(QK_LAYER_MOD_GET_MODS(keycode));
+ append_char(')');
+ return;
+
+ case QK_TO ... QK_TO_MAX: // TO(layer) key.
+ append_unary_keycode(PSTR("TO"), number_string(QK_TO_GET_LAYER(keycode), 10));
+ return;
+
+ case QK_MOMENTARY ... QK_MOMENTARY_MAX: // MO(layer) key.
+ append_unary_keycode(PSTR("MO"), number_string(QK_MOMENTARY_GET_LAYER(keycode), 10));
+ return;
+
+ case QK_DEF_LAYER ... QK_DEF_LAYER_MAX: // DF(layer) key.
+ append_unary_keycode(PSTR("DF"), number_string(QK_DEF_LAYER_GET_LAYER(keycode), 10));
+ return;
+
+ case QK_TOGGLE_LAYER ... QK_TOGGLE_LAYER_MAX: // TG(layer) key.
+ append_unary_keycode(PSTR("TG"), number_string(QK_TOGGLE_LAYER_GET_LAYER(keycode), 10));
+ return;
+
+#if !defined(NO_ACTION_ONESHOT)
+ case QK_ONE_SHOT_LAYER ... QK_ONE_SHOT_LAYER_MAX: // OSL(layer) key.
+ append_unary_keycode(PSTR("OSL"), number_string(QK_ONE_SHOT_LAYER_GET_LAYER(keycode), 10));
+ return;
+#endif // !defined(NO_ACTION_ONESHOT)
+
+ case QK_LAYER_TAP_TOGGLE ... QK_LAYER_TAP_TOGGLE_MAX: // TT(layer) key.
+ append_unary_keycode(PSTR("TT"), number_string(QK_LAYER_TAP_TOGGLE_GET_LAYER(keycode), 10));
+ return;
+
+ case QK_PERSISTENT_DEF_LAYER ... QK_PERSISTENT_DEF_LAYER_MAX: // PDF(layer) key.
+ append_unary_keycode(PSTR("PDF"), number_string(QK_PERSISTENT_DEF_LAYER_GET_LAYER(keycode), 10));
+ return;
+
+ // Mod-tap MT(mod,kc) key. This implementation formats the MT keys where
+ // one modifier is applied. For MT keys with multiple modifiers, the mod
+ // arg is written numerically as a hex code.
+ case QK_MOD_TAP ... QK_MOD_TAP_MAX: {
+ uint8_t mods = QK_MOD_TAP_GET_MODS(keycode);
+ const bool is_rhs = mods > 15;
+ const uint8_t csag = mods & 15;
+ if (csag != 0 && (csag & (csag - 1)) == 0) { // One mod is set.
+ append_char(is_rhs ? 'R' : 'L');
+ append_P(&mod_names[4 * biton(csag)]);
+ append_P(PSTR("_T("));
+ } else if (mods == MOD_HYPR) {
+ append_P(PSTR("HYPR_T("));
+ } else if (mods == MOD_MEH) {
+ append_P(PSTR("MEH_T("));
+ } else {
+ append_P(PSTR("MT("));
+ append_number(mods, 16);
+ append_char(',');
+ }
+ append_keycode(QK_MOD_TAP_GET_TAP_KEYCODE(keycode));
+ append_char(')');
+ } return;
+
+ case QK_TAP_DANCE ... QK_TAP_DANCE_MAX: // Tap dance TD(i) key.
+ append_unary_keycode(PSTR("TD"), number_string(QK_TAP_DANCE_GET_INDEX(keycode), 10));
+ return;
+
+#ifdef UNICODE_ENABLE
+ case QK_UNICODE ... QK_UNICODE_MAX: // Unicode UC(codepoint) key.
+ append_unary_keycode(PSTR("UC"), number_string(QK_UNICODE_GET_CODE_POINT(keycode), 16));
+ return;
+#elif defined(UNICODEMAP_ENABLE)
+ case QK_UNICODEMAP ... QK_UNICODEMAP_MAX: // Unicode Map UM(i) key.
+ append_unary_keycode(PSTR("UM"), number_string(QK_UNICODEMAP_GET_INDEX(keycode), 10));
+ return;
+
+ case QK_UNICODEMAP_PAIR ... QK_UNICODEMAP_PAIR_MAX: { // UP(i,j) key.
+ const uint8_t i = QK_UNICODEMAP_PAIR_GET_UNSHIFTED_INDEX(keycode);
+ const uint8_t j = QK_UNICODEMAP_PAIR_GET_SHIFTED_INDEX(keycode);
+ append_P(PSTR("UP("));
+ append_number(i, 10);
+ append_char(',');
+ append_number(j, 10);
+ append_char(')');
+ } return;
+#endif
+#ifdef MOUSEKEY_ENABLE
+ case MS_BTN1 ... MS_BTN8: // Mouse button keycode.
+ append_numbered_keycode(PSTR("MS_BTN"), keycode - (MS_BTN1 - 1));
+ return;
+#endif // MOUSEKEY_ENABLE
+#ifdef SWAP_HANDS_ENABLE
+ case QK_SWAP_HANDS ... QK_SWAP_HANDS_MAX: // Swap Hands SH_T(kc) key.
+ if (!IS_SWAP_HANDS_KEYCODE(keycode)) {
+ append_P(PSTR("SH_T("));
+ append_keycode(QK_SWAP_HANDS_GET_TAP_KEYCODE(keycode));
+ append_char(')');
+ return;
+ }
+ break;
+#endif // SWAP_HANDS_ENABLE
+#ifdef JOYSTICK_ENABLE
+ case JOYSTICK_KEYCODE_RANGE: // Joystick JS_ key.
+ append_numbered_keycode(PSTR("JS_"), keycode - JS_0);
+ return;
+#endif // JOYSTICK_ENABLE
+#ifdef PROGRAMMABLE_BUTTON_ENABLE
+ case PROGRAMMABLE_BUTTON_KEYCODE_RANGE: // Programmable button PB_ key.
+ append_numbered_keycode(PSTR("PB_"), keycode - (PB_1 - 1));
+ return;
+#endif // PROGRAMMABLE_BUTTON_ENABLE
+
+ case MACRO_KEYCODE_RANGE: // Macro range MC_ keycode.
+ append_numbered_keycode(PSTR("MC_"), keycode - MC_0);
+ return;
+
+ case KB_KEYCODE_RANGE: // Keyboard range keycode.
+ append_numbered_keycode(PSTR("QK_KB_"), keycode - QK_KB_0);
+ return;
+
+ case USER_KEYCODE_RANGE: // User range keycode.
+ append_numbered_keycode(PSTR("QK_USER_"), keycode - QK_USER_0);
+ return;
+
+ // It would take a nontrivial amount of string data to cover some
+ // feature-specific keycodes, such as those for MIDI and lighting. As a
+ // fallback while still providing some information, we stringify
+ // remaining keys in known code ranges as "QK_<feature>+<number>".
+#ifdef MAGIC_ENABLE
+ case MAGIC_KEYCODE_RANGE:
+ append_numbered_keycode(PSTR("QK_MAGIC+"), keycode - QK_MAGIC);
+ return;
+#endif // MAGIC_ENABLE
+#ifdef MIDI_ENABLE
+ case MIDI_KEYCODE_RANGE:
+ append_numbered_keycode(PSTR("QK_MIDI+"), keycode - QK_MIDI);
+ return;
+#endif // MIDI_ENABLE
+#ifdef SEQUENCER_ENABLE
+ case SEQUENCER_KEYCODE_RANGE:
+ append_numbered_keycode(PSTR("QK_SEQUENCER+"), keycode - QK_SEQUENCER);
+ return;
+#endif // SEQUENCER_ENABLE
+#ifdef AUDIO_ENABLE
+ case AUDIO_KEYCODE_RANGE:
+ append_numbered_keycode(PSTR("QK_AUDIO+"), keycode - QK_AUDIO);
+ return;
+#endif // AUDIO_ENABLE
+#if defined(BACKLIGHT_ENABLE) || defined(LED_MATRIX_ENABLE) || defined(RGBLIGHT_ENABLED) || defined(RGB_MATRIX_ENABLE) // Lighting-related features.
+ case QK_LIGHTING ... QK_LIGHTING_MAX:
+ append_numbered_keycode(PSTR("QK_LIGHTING+"), keycode - QK_LIGHTING);
+ return;
+#endif // defined(BACKLIGHT_ENABLE) || defined(LED_MATRIX_ENABLE) || defined(RGBLIGHT_ENABLED) || defined(RGB_MATRIX_ENABLE)
+#ifdef STENO_ENABLE
+ case STENO_KEYCODE_RANGE:
+ append_numbered_keycode(PSTR("QK_STENO+"), keycode - QK_STENO);
+ return;
+#endif // AUDIO_ENABLE
+#ifdef BLUETOOTH_ENABLE
+ case CONNECTION_KEYCODE_RANGE:
+ append_numbered_keycode(PSTR("QK_CONNECTION+"), keycode - QK_CONNECTION);
+ return;
+#endif // BLUETOOTH_ENABLE
+ case QUANTUM_KEYCODE_RANGE:
+ append_numbered_keycode(PSTR("QK_QUANTUM+"), keycode - QK_QUANTUM);
+ return;
+ }
+ // clang-format on
+
+ append_number(keycode, 16); // Fallback: write keycode as hex value.
+}
+
+const char* get_keycode_string(uint16_t keycode) {
+ buffer_len = 0;
+ buffer[0] = '\0';
+ append_keycode(keycode);
+ return buffer;
+}