1 files changed, 31 insertions, 0 deletions
diff --git a/printing/page_range.cc b/printing/page_range.cc
new file mode 100644
index 0000000..ffe572d
--- /dev/null
+++ b/printing/page_range.cc
@@ -0,0 +1,31 @@
+// Copyright (c) 2006-2008 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 "printing/page_range.h"
+
+#include "base/stl_util-inl.h"
+
+namespace printing {
+
+/* static */
+std::vector<int> PageRange::GetPages(const PageRanges& ranges) {
+  std::set<int> pages;
+  for (unsigned i = 0; i < ranges.size(); ++i) {
+    const PageRange& range = ranges[i];
+    // Ranges are inclusive.
+    for (int i = range.from; i <= range.to; ++i) {
+      pages.insert(i);
+    }
+  }
+  return SetToVector(pages);
+}
+
+/* static */
+int PageRange::GetTotalPages(const PageRanges& ranges) {
+  // Since ranges can overlap we need to merge them before counting
+  std::vector<int> pages = PageRange::GetPages(ranges);
+  return pages.size();
+}
+
+}  // namespace printing