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-rw-r--r--quantum/process_keycode/process_unicode_common.c49
-rw-r--r--quantum/process_keycode/process_unicode_common.h1
2 files changed, 50 insertions, 0 deletions
diff --git a/quantum/process_keycode/process_unicode_common.c b/quantum/process_keycode/process_unicode_common.c
index 94383f19b7..4ac305e661 100644
--- a/quantum/process_keycode/process_unicode_common.c
+++ b/quantum/process_keycode/process_unicode_common.c
@@ -178,6 +178,55 @@ void send_unicode_hex_string(const char *str) {
}
}
+// Borrowed from https://nullprogram.com/blog/2017/10/06/
+const char *decode_utf8(const char *str, int32_t *code_point) {
+ const char *next;
+
+ if (str[0] < 0x80) { // U+0000-007F
+ *code_point = str[0];
+ next = str + 1;
+ } else if ((str[0] & 0xE0) == 0xC0) { // U+0080-07FF
+ *code_point = ((int32_t)(str[0] & 0x1F) << 6) | ((int32_t)(str[1] & 0x3F) << 0);
+ next = str + 2;
+ } else if ((str[0] & 0xF0) == 0xE0) { // U+0800-FFFF
+ *code_point = ((int32_t)(str[0] & 0x0F) << 12) | ((int32_t)(str[1] & 0x3F) << 6) | ((int32_t)(str[2] & 0x3F) << 0);
+ next = str + 3;
+ } else if ((str[0] & 0xF8) == 0xF0 && (str[0] <= 0xF4)) { // U+10000-10FFFF
+ // Skip for now - register_hex() only takes a uint16
+ //*code_point = ((int32_t)(str[0] & 0x07) << 18) | ((int32_t)(str[1] & 0x3F) << 12) | ((int32_t)(str[2] & 0x3F) << 6) | ((int32_t)(str[3] & 0x3F) << 0);
+ *code_point = -1;
+ next = str + 4;
+ } else {
+ *code_point = -1;
+ next = str + 1;
+ }
+
+ // part of a UTF-16 surrogate pair - invalid
+ if (*code_point >= 0xD800 && *code_point <= 0xDFFF) {
+ *code_point = -1;
+ }
+
+ return next;
+}
+
+void send_unicode_string(const char *str) {
+ if (!str) {
+ return;
+ }
+
+ int32_t code_point = 0;
+
+ while (*str) {
+ str = decode_utf8(str, &code_point);
+
+ if (code_point >= 0) {
+ unicode_input_start();
+ register_hex(code_point);
+ unicode_input_finish();
+ }
+ }
+}
+
bool process_unicode_common(uint16_t keycode, keyrecord_t *record) {
if (record->event.pressed) {
switch (keycode) {
diff --git a/quantum/process_keycode/process_unicode_common.h b/quantum/process_keycode/process_unicode_common.h
index cab6eea6ea..393db2d99e 100644
--- a/quantum/process_keycode/process_unicode_common.h
+++ b/quantum/process_keycode/process_unicode_common.h
@@ -80,6 +80,7 @@ void unicode_input_cancel(void);
void register_hex(uint16_t hex);
void send_unicode_hex_string(const char *str);
+void send_unicode_string(const char *str);
bool process_unicode_common(uint16_t keycode, keyrecord_t *record);