Add temporary log output

Currently the kernel idle process is an infinite loop printing logs,
with no locking.

src/kernel/log.cpp

@@ -1,5 +1,6 @@
 #include "kutil/constexpr_hash.h"
 #include "kutil/memory.h"
+#include "console.h"
 #include "log.h"
 
 namespace logs {
@@ -13,6 +14,33 @@ static log::logger g_logger(log_buffer, sizeof(log_buffer));
 #include "log_areas.inc"
 #undef LOG
 
+static const uint8_t level_colors[] = {0x07, 0x07, 0x0f, 0x0b, 0x09};
+
+static void
+output_log(log::level severity, log::area_t area, const char *message)
+{
+}
+
+void
+output_logs()
+{
+	uint8_t buffer[257];
+	auto *ent = reinterpret_cast<log::logger::entry *>(buffer);
+	auto *cons = console::get();
+
+	while (true) {
+		if(g_logger.get_entry(buffer, sizeof(buffer))) {
+			buffer[ent->bytes] = 0;
+			cons->set_color(level_colors[static_cast<int>(ent->severity)]);
+			cons->printf("%9s %8s: %s\n",
+					g_logger.area_name(ent->area),
+					g_logger.level_name(ent->severity),
+					ent->message);
+			cons->set_color();
+		}
+	}
+}
+
 void init()
 {
 	new (&g_logger) log::logger(log_buffer, sizeof(log_buffer));