Merge src/leveldb changes for LevelDB 1.18.

src/leveldb/table/block.cc

@@ -46,7 +46,7 @@ Block::~Block() {
 // Helper routine: decode the next block entry starting at "p",
 // storing the number of shared key bytes, non_shared key bytes,
 // and the length of the value in "*shared", "*non_shared", and
-// "*value_length", respectively.  Will not derefence past "limit".
+// "*value_length", respectively.  Will not dereference past "limit".
 //
 // If any errors are detected, returns NULL.  Otherwise, returns a
 // pointer to the key delta (just past the three decoded values).

src/leveldb/table/block_builder.h

@@ -21,7 +21,7 @@ class BlockBuilder {
   // Reset the contents as if the BlockBuilder was just constructed.
   void Reset();
 
-  // REQUIRES: Finish() has not been callled since the last call to Reset().
+  // REQUIRES: Finish() has not been called since the last call to Reset().
   // REQUIRES: key is larger than any previously added key
   void Add(const Slice& key, const Slice& value);
 

src/leveldb/table/format.cc

@@ -48,7 +48,7 @@ Status Footer::DecodeFrom(Slice* input) {
   const uint64_t magic = ((static_cast<uint64_t>(magic_hi) << 32) |
                           (static_cast<uint64_t>(magic_lo)));
   if (magic != kTableMagicNumber) {
-    return Status::InvalidArgument("not an sstable (bad magic number)");
+    return Status::Corruption("not an sstable (bad magic number)");
   }
 
   Status result = metaindex_handle_.DecodeFrom(input);

src/leveldb/table/table.cc

@@ -41,7 +41,7 @@ Status Table::Open(const Options& options,
                    Table** table) {
   *table = NULL;
   if (size < Footer::kEncodedLength) {
-    return Status::InvalidArgument("file is too short to be an sstable");
+    return Status::Corruption("file is too short to be an sstable");
   }
 
   char footer_space[Footer::kEncodedLength];
@@ -58,7 +58,11 @@ Status Table::Open(const Options& options,
   BlockContents contents;
   Block* index_block = NULL;
   if (s.ok()) {
-    s = ReadBlock(file, ReadOptions(), footer.index_handle(), &contents);
+    ReadOptions opt;
+    if (options.paranoid_checks) {
+      opt.verify_checksums = true;
+    }
+    s = ReadBlock(file, opt, footer.index_handle(), &contents);
     if (s.ok()) {
       index_block = new Block(contents);
     }
@@ -92,6 +96,9 @@ void Table::ReadMeta(const Footer& footer) {
   // TODO(sanjay): Skip this if footer.metaindex_handle() size indicates
   // it is an empty block.
   ReadOptions opt;
+  if (rep_->options.paranoid_checks) {
+    opt.verify_checksums = true;
+  }
   BlockContents contents;
   if (!ReadBlock(rep_->file, opt, footer.metaindex_handle(), &contents).ok()) {
     // Do not propagate errors since meta info is not needed for operation
@@ -120,6 +127,9 @@ void Table::ReadFilter(const Slice& filter_handle_value) {
   // We might want to unify with ReadBlock() if we start
   // requiring checksum verification in Table::Open.
   ReadOptions opt;
+  if (rep_->options.paranoid_checks) {
+    opt.verify_checksums = true;
+  }
   BlockContents block;
   if (!ReadBlock(rep_->file, opt, filter_handle, &block).ok()) {
     return;