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-rw-r--r--third_party/base/stl_util.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/third_party/base/stl_util.h b/third_party/base/stl_util.h
index 32656038c1..7f1d38bf40 100644
--- a/third_party/base/stl_util.h
+++ b/third_party/base/stl_util.h
@@ -5,6 +5,8 @@
#ifndef PDFIUM_THIRD_PARTY_BASE_STL_UTIL_H_
#define PDFIUM_THIRD_PARTY_BASE_STL_UTIL_H_
+#include "third_party/base/numerics/safe_conversions.h"
+
namespace pdfium {
// Test to see if a set, map, hash_set or hash_map contains a particular key.
@@ -22,6 +24,13 @@ bool ContainsValue(const Collection& collection, const Value& value) {
collection.end();
}
+// Convenience routine for "int-fected" code, so that the stl collection
+// size_t size() method return values will be checked.
+template <typename ResultType, typename Collection>
+ResultType CollectionSize(const Collection& collection) {
+ return pdfium::base::checked_cast<ResultType, size_t>(collection.size());
+}
+
} // namespace pdfium
#endif // PDFIUM_THIRD_PARTY_BASE_STL_UTIL_H_