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-rw-r--r--third_party/base/stl_util.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/third_party/base/stl_util.h b/third_party/base/stl_util.h
index fcbe5882a2..50e9341569 100644
--- a/third_party/base/stl_util.h
+++ b/third_party/base/stl_util.h
@@ -22,6 +22,21 @@ inline const T* vector_as_array(const std::vector<T>* v) {
return v->empty() ? nullptr : &*v->begin();
}
+// Test to see if a set, map, hash_set or hash_map contains a particular key.
+// Returns true if the key is in the collection.
+template <typename Collection, typename Key>
+bool ContainsKey(const Collection& collection, const Key& key) {
+ return collection.find(key) != collection.end();
+}
+
+// Test to see if a collection like a vector contains a particular value.
+// Returns true if the value is in the collection.
+template <typename Collection, typename Value>
+bool ContainsValue(const Collection& collection, const Value& value) {
+ return std::find(collection.begin(), collection.end(), value) !=
+ collection.end();
+}
+
} // namespace pdfium
#endif // PDFIUM_THIRD_PARTY_BASE_STL_UTIL_H_