Added unicode input event (#63)

* Added unicode input event

* Prevents strcpy overflow

* Updated according to change requests

src/Input.h

@@ -25,6 +25,14 @@ typedef struct _NV_KEYBOARD_PACKET {
     short zero2;
 } NV_KEYBOARD_PACKET, *PNV_KEYBOARD_PACKET;
 
+#define UTF8_TEXT_EVENT_MAGIC 0x17
+#define UTF8_TEXT_EVENT_MAX_COUNT 32
+typedef struct _NV_UNICODE_PACKET {
+    unsigned int size;
+    int magic;
+    char text[UTF8_TEXT_EVENT_MAX_COUNT];
+} NV_UNICODE_PACKET, *PNV_UNICODE_PACKET;
+
 #define PACKET_TYPE_REL_MOUSE_MOVE 0x08
 #define MOUSE_MOVE_REL_MAGIC 0x06
 typedef struct _NV_REL_MOUSE_MOVE_PACKET {

src/InputStream.c

@@ -26,6 +26,7 @@ typedef struct _PACKET_HOLDER {
         NV_MULTI_CONTROLLER_PACKET multiController;
         NV_SCROLL_PACKET scroll;
         NV_HAPTICS_PACKET haptics;
+        NV_UNICODE_PACKET unicode;
     } packet;
     LINKED_BLOCKING_QUEUE_ENTRY entry;
 } PACKET_HOLDER, *PPACKET_HOLDER;
@@ -607,6 +608,38 @@ int LiSendKeyboardEvent(short keyCode, char keyAction, char modifiers) {
     return err;
 }
 
+int LiSendUtf8TextEvent(const char *text, unsigned int length) {
+    PPACKET_HOLDER holder;
+    int err;
+
+    if (!initialized) {
+        return -2;
+    }
+
+    if (length > UTF8_TEXT_EVENT_MAX_COUNT) {
+        return -1;
+    }
+    holder = allocatePacketHolder();
+    if (holder == NULL) {
+        return -1;
+    }
+    // Size + magic + string length
+    holder->packetLength = 4 + 4 + length;
+    // Magic + string length
+    holder->packet.unicode.size = BE32(4 + length);
+    holder->packet.unicode.magic = LE32(UTF8_TEXT_EVENT_MAGIC);
+    memcpy(holder->packet.unicode.text, text, length);
+
+    err = LbqOfferQueueItem(&packetQueue, holder, &holder->entry);
+    if (err != LBQ_SUCCESS) {
+        LC_ASSERT(err == LBQ_BOUND_EXCEEDED);
+        Limelog("Input queue reached maximum size limit\n");
+        freePacketHolder(holder);
+    }
+
+    return err;
+}
+
 static int sendControllerEventInternal(short controllerNumber, short activeGamepadMask,
     short buttonFlags, unsigned char leftTrigger, unsigned char rightTrigger,
     short leftStickX, short leftStickY, short rightStickX, short rightStickY)

src/Limelight.h

@@ -519,6 +519,10 @@ int LiSendMouseButtonEvent(char action, int button);
 #define MODIFIER_META 0x08
 int LiSendKeyboardEvent(short keyCode, char keyAction, char modifiers);
 
+// This function queues an UTF-8 encoded text to be sent to the remote server.
+// Currently maximum length is 32 bytes.
+int LiSendUtf8TextEvent(const char *text, unsigned int length);
+
 // Button flags
 #define A_FLAG     0x1000
 #define B_FLAG     0x2000