From ea3407d1ec6a2800353896fac481023dbc3f4854 Mon Sep 17 00:00:00 2001
From: Vladimir Byko-Ianko <v.bykoianko@corp.mail.ru>
Date: Tue, 4 Sep 2018 17:19:44 +0300
Subject: [PATCH] Explicit check that only little endian architectures are
 supported.

---
 coding/endianness.hpp                       | 11 +++++++++++
 generator/generator_tool/generator_tool.cpp |  3 +++
 map/framework.cpp                           |  5 +++++
 3 files changed, 19 insertions(+)

diff --git a/coding/endianness.hpp b/coding/endianness.hpp
index 103f6fa04b..2f0329d594 100644
--- a/coding/endianness.hpp
+++ b/coding/endianness.hpp
@@ -8,6 +8,10 @@
 
 // #define ENDIAN_IS_BIG
 
+// @TODO(bykoianko) This method returns false since 05.12.2010. That means only little endian
+// architecture is supported. Now checks are added to generator and to app that only
+// little endian architecture is supported. All the usage of IsBigEndian(), ReverseByteOrder()
+// and SwapIfBigEndian() should be removed.
 inline bool IsBigEndian()
 {
 #ifdef ENDIAN_IS_BIG
@@ -37,3 +41,10 @@ template <typename T> inline T SwapIfBigEndian(T t)
   return t;
 #endif
 }
+
+inline bool IsLittleEndian()
+{
+  uint16_t const word = 0x0001;
+  char const * const b = reinterpret_cast<char const * const>(&word);
+  return b[0] == 0x1;
+}
diff --git a/generator/generator_tool/generator_tool.cpp b/generator/generator_tool/generator_tool.cpp
index b2cc1a56c5..3ee4b2642b 100644
--- a/generator/generator_tool/generator_tool.cpp
+++ b/generator/generator_tool/generator_tool.cpp
@@ -43,6 +43,7 @@
 
 #include "platform/platform.hpp"
 
+#include "coding/endianness.hpp"
 #include "coding/file_name_utils.hpp"
 #include "coding/transliteration.hpp"
 
@@ -167,6 +168,8 @@ using namespace generator;
 
 int main(int argc, char ** argv)
 {
+  CHECK(IsLittleEndian(), ("Only little endian architecture is supported."));
+
   google::SetUsageMessage(
         "Takes OSM XML data from stdin and creates data and index files in several passes.");
 
diff --git a/map/framework.cpp b/map/framework.cpp
index f91091f029..7e2bf8345f 100644
--- a/map/framework.cpp
+++ b/map/framework.cpp
@@ -72,6 +72,7 @@
 #include "platform/settings.hpp"
 #include "platform/socket.hpp"
 
+#include "coding/endianness.hpp"
 #include "coding/file_name_utils.hpp"
 #include "coding/multilang_utf8_string.hpp"
 #include "coding/transliteration.hpp"
@@ -391,6 +392,10 @@ Framework::Framework(FrameworkParams const & params)
   , m_purchase(std::make_unique<Purchase>())
   , m_tipsApi(static_cast<TipsApi::Delegate &>(*this))
 {
+  CHECK(IsLittleEndian(), ("Only little endian architecture is supported."));
+
+  m_startBackgroundTime = my::Timer::LocalTime();
+
   // Editor should be initialized from the main thread to set its ThreadChecker.
   // However, search calls editor upon initialization thus setting the lazy editor's ThreadChecker
   // to a wrong thread. So editor should be initialiazed before serach.