Initial step to support version 4 format in native code.

Bug: 11073222
Change-Id: I633229381b28cef23edef2b37e5b0bf6e15af468

native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_with_buffer_policy_factory.cpp

@@ -42,6 +42,9 @@ namespace latinime {
             return new PatriciaTriePolicy(mmapedBuffer);
         case FormatUtils::VERSION_3:
             return new DynamicPatriciaTriePolicy(mmapedBuffer);
+        case FormatUtils::VERSION_4:
+            // TODO: Support version 4 dictionary format.
+            // Fall through.
         default:
             AKLOGE("DICT: dictionary format is unknown, bad magic number");
             delete mmapedBuffer;

native/jni/src/suggest/policyimpl/dictionary/header/header_read_write_utils.cpp

@@ -118,6 +118,9 @@ const char *const HeaderReadWriteUtils::REQUIRES_FRENCH_LIGATURE_PROCESSING_KEY
         case FormatUtils::VERSION_3:
             return buffer->writeUintAndAdvancePosition(3 /* data */,
                     HEADER_DICTIONARY_VERSION_SIZE, writingPos);
+        case FormatUtils::VERSION_4:
+            return buffer->writeUintAndAdvancePosition(4 /* data */,
+                    HEADER_DICTIONARY_VERSION_SIZE, writingPos);
         default:
             return false;
     }

native/jni/src/suggest/policyimpl/dictionary/utils/dict_file_writing_utils.cpp

@@ -33,6 +33,9 @@ const char *const DictFileWritingUtils::TEMP_FILE_SUFFIX_FOR_WRITING_DICT_FILE =
     switch (dictVersion) {
         case 3:
             return createEmptyV3DictFile(filePath, attributeMap);
+        case 4:
+            // TODO: Support version 4 dictionary format.
+            return false;
         default:
             // Only version 3 dictionary is supported for now.
             return false;

native/jni/src/suggest/policyimpl/dictionary/utils/format_utils.cpp

@@ -45,6 +45,8 @@ const int FormatUtils::DICTIONARY_MINIMUM_SIZE = 12;
                 return VERSION_2;
             } else if (ByteArrayUtils::readUint16(dict, 4) == 3) {
                 return VERSION_3;
+            } else if (ByteArrayUtils::readUint16(dict, 4) == 4) {
+                return VERSION_4;
             } else {
                 return UNKNOWN_VERSION;
             }

native/jni/src/suggest/policyimpl/dictionary/utils/format_utils.h

@@ -31,6 +31,7 @@ class FormatUtils {
     enum FORMAT_VERSION {
         VERSION_2,
         VERSION_3,
+        VERSION_4,
         UNKNOWN_VERSION
     };