From 1b884a56d5209be2436690fc34ffc27660e94175 Mon Sep 17 00:00:00 2001
From: tatiana-yan <tatiana.kondakova@gmail.com>
Date: Wed, 1 Jul 2020 16:22:40 +0300
Subject: [PATCH] [search] Check we have hiragana before transliteration.

---
 base/buffer_vector.hpp          | 2 ++
 indexer/search_string_utils.cpp | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/base/buffer_vector.hpp b/base/buffer_vector.hpp
index 9c12e10684..8a5ef8eafa 100644
--- a/base/buffer_vector.hpp
+++ b/base/buffer_vector.hpp
@@ -237,8 +237,10 @@ public:
   //@}
 
   T const * begin() const { return data(); }
+  T const * cbegin() const { return data(); }
   T       * begin()       { return data(); }
   T const * end() const { return data() + size(); }
+  T const * cend() const { return data() + size(); }
   T       * end()       { return data() + size(); }
   //@}
 
diff --git a/indexer/search_string_utils.cpp b/indexer/search_string_utils.cpp
index cf8a021da3..c2ef88f840 100644
--- a/indexer/search_string_utils.cpp
+++ b/indexer/search_string_utils.cpp
@@ -64,6 +64,10 @@ void RemoveNumeroSigns(UniString & s)
 
 void TransliterateHiraganaToKatakana(UniString & s)
 {
+  // Transliteration is heavy. Check we have any hiragana symbol before transliteration.
+  if (!base::AnyOf(s, [](UniChar c){ return c >= 0x3041 && c<= 0x309F; }))
+    return;
+
   InitTransliterationInstanceWithDefaultDirs();
   string out;
   if (Transliteration::Instance().Transliterate(strings::ToUtf8(s), "Hiragana-Katakana", out))