[Base] Move implementation out of header where appropriate, and qualify std namespace.

src/xenia/base/vec128.cc

@@ -0,0 +1,26 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include <cstddef>
+#include <string>
+
+#include "xenia/base/math.h"
+#include "xenia/base/platform.h"
+#include "xenia/base/vec128.h"
+
+namespace xe {
+
+inline std::string to_string(const vec128_t& value) {
+  char buffer[128];
+  std::snprintf(buffer, sizeof(buffer), "(%g, %g, %g, %g)", value.x, value.y,
+                value.z, value.w);
+  return std::string(buffer);
+}
+
+}  // namespace xe