Re-work to support size_t max constant for 32/64-bit.

port/port_posix.h

@@ -82,6 +82,7 @@ namespace port {
 // For use at db/file_indexer.h kLevelMaxIndex
 const int kMaxInt32 = std::numeric_limits<int32_t>::max();
 const uint64_t kMaxUint64 = std::numeric_limits<uint64_t>::max();
+const size_t kMaxSizet = std::numeric_limits<size_t>::max();
 
 static const bool kLittleEndian = PLATFORM_IS_LITTLE_ENDIAN;
 #undef PLATFORM_IS_LITTLE_ENDIAN

port/win/port_win.h

@@ -99,6 +99,13 @@ namespace port {
 // For use at db/file_indexer.h kLevelMaxIndex
 const int kMaxInt32 = INT32_MAX;
 const uint64_t kMaxUint64 = UINT64_MAX;
+// std::numeric_limits<size_t>::max() is not constexpr just yet
+// therefore, use the same limits
+#ifdef _WIN64
+const size_t kMaxSizet = UINT64_MAX;
+#else
+const size_t kMaxSizet = UINT_MAX;
+#endif
 
 const bool kLittleEndian = true;
 

utilities/write_batch_with_index/write_batch_with_index_internal.h

@@ -31,7 +31,7 @@ struct WriteBatchIndexEntry {
 
   // If this flag appears in the offset, it indicates a key that is smaller
   // than any other entry for the same column family
-  static const size_t kFlagMin = port::kMaxUint64;
+  static const size_t kFlagMin = port::kMaxSizet;
 
   size_t offset;           // offset of an entry in write batch's string buffer.
   uint32_t column_family;  // column family of the entry