LCOV - code coverage report
Current view: top level - src/leveldb/db - dbformat.cc (source / functions) Hit Total Coverage
Test: coverage.lcov Lines: 75 95 78.9 %
Date: 2021-06-29 14:35:33 Functions: 9 12 75.0 %
Legend: Modified by patch:
Lines: hit not hit | Branches: + taken - not taken # not executed

Not modified by patch:
Lines: hit not hit | Branches: + taken - not taken # not executed
Branches: 19 24 79.2 %

           Branch data     Line data    Source code
#       1                 :            : // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
#       2                 :            : // Use of this source code is governed by a BSD-style license that can be
#       3                 :            : // found in the LICENSE file. See the AUTHORS file for names of contributors.
#       4                 :            : 
#       5                 :            : #include "db/dbformat.h"
#       6                 :            : 
#       7                 :            : #include <stdio.h>
#       8                 :            : 
#       9                 :            : #include <sstream>
#      10                 :            : 
#      11                 :            : #include "port/port.h"
#      12                 :            : #include "util/coding.h"
#      13                 :            : 
#      14                 :            : namespace leveldb {
#      15                 :            : 
#      16                 :    7884043 : static uint64_t PackSequenceAndType(uint64_t seq, ValueType t) {
#      17                 :    7884043 :   assert(seq <= kMaxSequenceNumber);
#      18                 :    7884043 :   assert(t <= kValueTypeForSeek);
#      19                 :    7884043 :   return (seq << 8) | t;
#      20                 :    7884043 : }
#      21                 :            : 
#      22                 :       2561 : void AppendInternalKey(std::string* result, const ParsedInternalKey& key) {
#      23                 :       2561 :   result->append(key.user_key.data(), key.user_key.size());
#      24                 :       2561 :   PutFixed64(result, PackSequenceAndType(key.sequence, key.type));
#      25                 :       2561 : }
#      26                 :            : 
#      27                 :          0 : std::string ParsedInternalKey::DebugString() const {
#      28                 :          0 :   std::ostringstream ss;
#      29                 :          0 :   ss << '\'' << EscapeString(user_key.ToString()) << "' @ " << sequence << " : "
#      30                 :          0 :      << static_cast<int>(type);
#      31                 :          0 :   return ss.str();
#      32                 :          0 : }
#      33                 :            : 
#      34                 :          0 : std::string InternalKey::DebugString() const {
#      35                 :          0 :   ParsedInternalKey parsed;
#      36         [ #  # ]:          0 :   if (ParseInternalKey(rep_, &parsed)) {
#      37                 :          0 :     return parsed.DebugString();
#      38                 :          0 :   }
#      39                 :          0 :   std::ostringstream ss;
#      40                 :          0 :   ss << "(bad)" << EscapeString(rep_);
#      41                 :          0 :   return ss.str();
#      42                 :          0 : }
#      43                 :            : 
#      44                 :          0 : const char* InternalKeyComparator::Name() const {
#      45                 :          0 :   return "leveldb.InternalKeyComparator";
#      46                 :          0 : }
#      47                 :            : 
#      48                 :  193568816 : int InternalKeyComparator::Compare(const Slice& akey, const Slice& bkey) const {
#      49                 :            :   // Order by:
#      50                 :            :   //    increasing user key (according to user-supplied comparator)
#      51                 :            :   //    decreasing sequence number
#      52                 :            :   //    decreasing type (though sequence# should be enough to disambiguate)
#      53                 :  193568816 :   int r = user_comparator_->Compare(ExtractUserKey(akey), ExtractUserKey(bkey));
#      54         [ +  + ]:  193568816 :   if (r == 0) {
#      55                 :     967016 :     const uint64_t anum = DecodeFixed64(akey.data() + akey.size() - 8);
#      56                 :     967016 :     const uint64_t bnum = DecodeFixed64(bkey.data() + bkey.size() - 8);
#      57         [ +  + ]:     967016 :     if (anum > bnum) {
#      58                 :      64525 :       r = -1;
#      59         [ +  + ]:     902491 :     } else if (anum < bnum) {
#      60                 :     891636 :       r = +1;
#      61                 :     891636 :     }
#      62                 :     967016 :   }
#      63                 :  193568816 :   return r;
#      64                 :  193568816 : }
#      65                 :            : 
#      66                 :            : void InternalKeyComparator::FindShortestSeparator(std::string* start,
#      67                 :       2841 :                                                   const Slice& limit) const {
#      68                 :            :   // Attempt to shorten the user portion of the key
#      69                 :       2841 :   Slice user_start = ExtractUserKey(*start);
#      70                 :       2841 :   Slice user_limit = ExtractUserKey(limit);
#      71                 :       2841 :   std::string tmp(user_start.data(), user_start.size());
#      72                 :       2841 :   user_comparator_->FindShortestSeparator(&tmp, user_limit);
#      73 [ +  + ][ +  + ]:       2841 :   if (tmp.size() < user_start.size() &&
#      74         [ +  - ]:       2841 :       user_comparator_->Compare(user_start, tmp) < 0) {
#      75                 :            :     // User key has become shorter physically, but larger logically.
#      76                 :            :     // Tack on the earliest possible number to the shortened user key.
#      77                 :       1598 :     PutFixed64(&tmp,
#      78                 :       1598 :                PackSequenceAndType(kMaxSequenceNumber, kValueTypeForSeek));
#      79                 :       1598 :     assert(this->Compare(*start, tmp) < 0);
#      80                 :       1598 :     assert(this->Compare(tmp, limit) < 0);
#      81                 :       1598 :     start->swap(tmp);
#      82                 :       1598 :   }
#      83                 :       2841 : }
#      84                 :            : 
#      85                 :        842 : void InternalKeyComparator::FindShortSuccessor(std::string* key) const {
#      86                 :        842 :   Slice user_key = ExtractUserKey(*key);
#      87                 :        842 :   std::string tmp(user_key.data(), user_key.size());
#      88                 :        842 :   user_comparator_->FindShortSuccessor(&tmp);
#      89 [ +  + ][ +  + ]:        842 :   if (tmp.size() < user_key.size() &&
#      90         [ +  - ]:        842 :       user_comparator_->Compare(user_key, tmp) < 0) {
#      91                 :            :     // User key has become shorter physically, but larger logically.
#      92                 :            :     // Tack on the earliest possible number to the shortened user key.
#      93                 :         43 :     PutFixed64(&tmp,
#      94                 :         43 :                PackSequenceAndType(kMaxSequenceNumber, kValueTypeForSeek));
#      95                 :         43 :     assert(this->Compare(*key, tmp) < 0);
#      96                 :         43 :     key->swap(tmp);
#      97                 :         43 :   }
#      98                 :        842 : }
#      99                 :            : 
#     100                 :       2281 : const char* InternalFilterPolicy::Name() const { return user_policy_->Name(); }
#     101                 :            : 
#     102                 :            : void InternalFilterPolicy::CreateFilter(const Slice* keys, int n,
#     103                 :       3683 :                                         std::string* dst) const {
#     104                 :            :   // We rely on the fact that the code in table.cc does not mind us
#     105                 :            :   // adjusting keys[].
#     106                 :       3683 :   Slice* mkey = const_cast<Slice*>(keys);
#     107         [ +  + ]:     160656 :   for (int i = 0; i < n; i++) {
#     108                 :     156973 :     mkey[i] = ExtractUserKey(keys[i]);
#     109                 :            :     // TODO(sanjay): Suppress dups?
#     110                 :     156973 :   }
#     111                 :       3683 :   user_policy_->CreateFilter(keys, n, dst);
#     112                 :       3683 : }
#     113                 :            : 
#     114                 :    2449157 : bool InternalFilterPolicy::KeyMayMatch(const Slice& key, const Slice& f) const {
#     115                 :    2449157 :   return user_policy_->KeyMayMatch(ExtractUserKey(key), f);
#     116                 :    2449157 : }
#     117                 :            : 
#     118                 :    7879843 : LookupKey::LookupKey(const Slice& user_key, SequenceNumber s) {
#     119                 :    7879843 :   size_t usize = user_key.size();
#     120                 :    7879843 :   size_t needed = usize + 13;  // A conservative estimate
#     121                 :    7879843 :   char* dst;
#     122         [ +  - ]:    7879843 :   if (needed <= sizeof(space_)) {
#     123                 :    7879843 :     dst = space_;
#     124                 :    7879843 :   } else {
#     125                 :          0 :     dst = new char[needed];
#     126                 :          0 :   }
#     127                 :    7879843 :   start_ = dst;
#     128                 :    7879843 :   dst = EncodeVarint32(dst, usize + 8);
#     129                 :    7879843 :   kstart_ = dst;
#     130                 :    7879843 :   memcpy(dst, user_key.data(), usize);
#     131                 :    7879843 :   dst += usize;
#     132                 :    7879843 :   EncodeFixed64(dst, PackSequenceAndType(s, kValueTypeForSeek));
#     133                 :    7879843 :   dst += 8;
#     134                 :    7879843 :   end_ = dst;
#     135                 :    7879843 : }
#     136                 :            : 
#     137                 :            : }  // namespace leveldb

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