Bugfixes for iterator and documentation.

- Fix bug in Iterator::Prev where it would return the wrong key.
  Fixes issues 29 and 30.

- Added a tweak to testharness to allow running just some tests.

- Fixing two minor documentation errors based on issues 28 and 25.

- Cleanup; fix namespaces of export-to-C code.
  Also fix one "const char*" vs "char*" mismatch.



git-svn-id: https://leveldb.googlecode.com/svn/trunk@48 62dab493-f737-651d-591e-8d6aee1b9529

1 files changed, 2 insertions, 1 deletions

diff --git a/db/db_iter.cc b/db/db_iter.cc
index 0be18ff..8849f92 100644
--- a/db/db_iter.cc
+++ b/db/db_iter.cc
@@ -216,7 +216,6 @@ void DBIter::FindPrevUserEntry() {
 
   ValueType value_type = kTypeDeletion;
   if (iter_->Valid()) {
-    SaveKey(ExtractUserKey(iter_->key()), &saved_key_);
     do {
       ParsedInternalKey ikey;
       if (ParseKey(&ikey) && ikey.sequence <= sequence_) {
@@ -227,6 +226,7 @@ void DBIter::FindPrevUserEntry() {
         }
         value_type = ikey.type;
         if (value_type == kTypeDeletion) {
+          saved_key_.clear();
           ClearSavedValue();
         } else {
           Slice raw_value = iter_->value();
@@ -234,6 +234,7 @@ void DBIter::FindPrevUserEntry() {
             std::string empty;
             swap(empty, saved_value_);
           }
+          SaveKey(ExtractUserKey(iter_->key()), &saved_key_);
           saved_value_.assign(raw_value.data(), raw_value.size());
         }
       }