Rename range.mm to range_mac.mm.

ui/base/range/range_win.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/base/range/range.h"
+
+#include <limits>
+
+#include "base/logging.h"
+
+namespace ui {
+
+Range::Range(const CHARRANGE& range, LONG total_length) {
+  // Check if this is an invalid range.
+  if (range.cpMin == -1 && range.cpMax == -1) {
+    *this = InvalidRange();
+  } else {
+    DCHECK_GE(range.cpMin, 0);
+    set_start(range.cpMin);
+    // {0,-1} is the "whole range" but that doesn't mean much out of context,
+    // so use the |total_length| parameter.
+    if (range.cpMax == -1) {
+      DCHECK_EQ(0, range.cpMin);
+      DCHECK_NE(-1, total_length);
+      set_end(total_length);
+    } else {
+      set_end(range.cpMax);
+    }
+  }
+}
+
+CHARRANGE Range::ToCHARRANGE() const {
+  CHARRANGE r = { -1, -1 };
+  if (!IsValid())
+    return r;
+
+  const LONG kLONGMax = std::numeric_limits<LONG>::max();
+  DCHECK_LE(static_cast<LONG>(start()), kLONGMax);
+  DCHECK_LE(static_cast<LONG>(end()), kLONGMax);
+  r.cpMin = start();
+  r.cpMax = end();
+  return r;
+}
+
+}  // namespace gfx