From 32b66cf8bfafb4c5b497588ae4bdbbdd5945c60d Mon Sep 17 00:00:00 2001
From: Julian Hinxlage <hinxlage.julian@web.de>
Date: Tue, 26 Nov 2019 11:49:19 +0100
Subject: [PATCH] + read and write keyboard buffer

---
 src/internal.cpp |  2 +-
 src/vkvm.cpp     | 13 +++++++++++--
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/internal.cpp b/src/internal.cpp
index 614e42c..510e56b 100644
--- a/src/internal.cpp
+++ b/src/internal.cpp
@@ -74,7 +74,7 @@ namespace vkvm {
     auto buttonPressed(KeyCode keyCode) -> void {
         lockSharedMemory();
         auto reg = getRegisters();
-        if (reg->keyboardBuffer_index_write == sizeof(reg->keyboardBuffer)) {
+        if (reg->keyboardBuffer_index_write >= sizeof(reg->keyboardBuffer)) {
             reg->keyboardBuffer_index_write = 0;
         }
         reg->keyboardBuffer[reg->keyboardBuffer_index_write++] = keyCode;
diff --git a/src/vkvm.cpp b/src/vkvm.cpp
index 46e5709..fdbff7a 100644
--- a/src/vkvm.cpp
+++ b/src/vkvm.cpp
@@ -210,8 +210,17 @@ namespace vkvm {
     }
 
     auto getLastPressedKey() -> KeyCode {
-        //TODO(julian): get key properly
-        return KeyCode(0);
+        lockSharedMemory();
+        auto reg = getRegisters();
+        if(reg->keyboardBuffer_index_read == reg->keyboardBuffer_index_write){
+            return KeyCode(0);
+        }
+        KeyCode keyCode = (KeyCode)reg->keyboardBuffer[reg->keyboardBuffer_index_read++];
+        if(reg->keyboardBuffer_index_read >= sizeof(reg->keyboardBuffer)){
+            reg->keyboardBuffer_index_read = 0;
+        }
+        unlockSharedMemory();
+        return keyCode;
     }
 
 }
\ No newline at end of file