Add Console class

src/Console.cc

@@ -0,0 +1,49 @@
+/* Console.cc
+ * vim: set tw=80:
+ * Eryn Wells <eryn@erynwells.me>
+ */
+/**
+ * Implementation of the Console class.
+ */
+
+#include "Console.hh"
+
+/** Create a VGA color pair. */
+static inline uint8_t
+makeVGAColor(Console::Color fg,
+             Console::Color bg)
+{
+    return fg | bg << 4;
+}
+
+/** Create a VGA character entry. */
+static inline uint16_t
+makeVGAEntry(char c,
+             uint8_t color)
+{
+    uint16_t c16 = c;
+    uint16_t color16 = color;
+    return c16 | color16 << 8;
+}
+
+
+namespace kernel {
+
+Console::Console()
+    : mBase(0xB8000),
+      mCursor({0, 0})
+{ }
+
+
+Console::clear(Console::Color color)
+{
+    const uint16_t color = makeVGAColor(Color::LightGray, Color::Blue);
+    for (size_t y = 0; y < Console::Height; y++) {
+        for (size_t x = 0; x < Console::Width; x++) {
+            const size_t index = y * Console::Width + x;
+            mBase[index] = makeVGAEntry(' ', color);
+        }
+    }
+}
+
+} /* namespace kernel */