Moved mm_version.* into “platform” library.

3 files changed, 126 insertions, 0 deletions

diff --git a/platform/mwm_version.cpp b/platform/mwm_version.cpp
new file mode 100644
index 0000000000..2796860b21
--- /dev/null
+++ b/platform/mwm_version.cpp
@@ -0,0 +1,80 @@
+#include "mwm_version.hpp"
+
+#include "coding/file_container.hpp"
+#include "coding/reader_wrapper.hpp"
+#include "coding/varint.hpp"
+#include "coding/writer.hpp"
+
+#include "base/timer.hpp"
+
+#include "defines.hpp"
+
+#include "std/ctime.hpp"
+
+namespace version
+{
+namespace
+{
+
+char const MWM_PROLOG[] = "MWM";
+
+template <class TSource>
+void ReadVersionT(TSource & src, MwmVersion & version)
+{
+  size_t const prologSize = ARRAY_SIZE(MWM_PROLOG);
+  char prolog[prologSize];
+  src.Read(prolog, prologSize);
+
+  if (strcmp(prolog, MWM_PROLOG) != 0)
+  {
+    version.format = v2;
+    version.timestamp =
+        my::GenerateTimestamp(2011 - 1900 /* number of years since 1900 */,
+                              10 /* number of month since January */, 1 /* month day */);
+    return;
+  }
+
+  // Read format value "as-is". It's correctness will be checked later
+  // with the correspondent return value.
+  version.format = static_cast<Format>(ReadVarUint<uint32_t>(src));
+  version.timestamp = ReadVarUint<uint32_t>(src);
+}
+}  // namespace
+
+MwmVersion::MwmVersion() : format(unknownFormat), timestamp(0) {}
+
+void WriteVersion(Writer & w)
+{
+  w.Write(MWM_PROLOG, ARRAY_SIZE(MWM_PROLOG));
+
+  // write inner data version
+  WriteVarUint(w, static_cast<uint32_t>(lastFormat));
+
+  // static is used for equal time stamp for all "mwm" files in one generation process
+  static uint32_t generatorStartTime = my::TodayAsYYMMDD();
+  WriteVarUint(w, generatorStartTime);
+}
+
+void ReadVersion(ReaderSrc & src, MwmVersion & version) { ReadVersionT(src, version); }
+
+bool ReadVersion(FilesContainerR const & container, MwmVersion & version)
+{
+  if (!container.IsExist(VERSION_FILE_TAG))
+    return false;
+
+  ModelReaderPtr versionReader = container.GetReader(VERSION_FILE_TAG);
+  ReaderSource<ModelReaderPtr> src(versionReader);
+  ReadVersionT(src, version);
+  return true;
+}
+
+uint32_t ReadVersionTimestamp(ModelReaderPtr const & reader)
+{
+  MwmVersion version;
+  if (!ReadVersion(FilesContainerR(reader), version))
+    return 0;
+
+  return version.timestamp;
+}
+
+}  // namespace version
diff --git a/platform/mwm_version.hpp b/platform/mwm_version.hpp
new file mode 100644
index 0000000000..5dd106fed3
--- /dev/null
+++ b/platform/mwm_version.hpp
@@ -0,0 +1,44 @@
+#pragma once
+
+#include "std/cstdint.hpp"
+
+class FilesContainerR;
+class ReaderSrc;
+class Writer;
+class ModelReaderPtr;
+
+namespace version
+{
+enum Format
+{
+  unknownFormat = -1,
+  v1 = 0,  // April 2011
+  v2,      // November 2011 (store type index, instead of raw type in mwm)
+  v3,      // March 2013 (store type index, instead of raw type in search data)
+  v4,      // April 2015 (distinguish и and й in search index)
+  v5,      // July 2015 (feature id is the index in vector now).
+  lastFormat = v5
+};
+
+struct MwmVersion
+{
+  MwmVersion();
+
+  Format format;
+  uint32_t timestamp;
+};
+
+/// Writes latest format and current timestamp to the writer.
+void WriteVersion(Writer & w);
+
+/// Reads mwm version from src.
+void ReadVersion(ReaderSrc & src, MwmVersion & version);
+
+/// \return True when version was successfully parsed from container,
+///         otherwise returns false. In the latter case version is
+///         unchanged.
+bool ReadVersion(FilesContainerR const & container, MwmVersion & version);
+
+/// Helper function that is usend in FindAllLocalMaps.
+uint32_t ReadVersionTimestamp(ModelReaderPtr const & reader);
+}  // namespace version
diff --git a/platform/platform.pro b/platform/platform.pro
index d5d88f6489..71be1f2ba2 100644
--- a/platform/platform.pro
+++ b/platform/platform.pro
@@ -74,6 +74,7 @@ HEADERS += \
     local_country_file_utils.hpp \
     location.hpp \
     measurement_utils.hpp \
+    mwm_version.hpp \
     platform.hpp \
     preferred_languages.hpp \
     servers_list.hpp \
@@ -90,6 +91,7 @@ SOURCES += \
     local_country_file.cpp \
     local_country_file_utils.cpp \
     measurement_utils.cpp \
+    mwm_version.cpp \
     platform.cpp \
     preferred_languages.cpp \
     servers_list.cpp \