Reduce code duplication. Rand48 class is in vespalib.

26 files changed, 75 insertions, 121 deletions

diff --git a/searchlib/src/apps/tests/btreestress_test.cpp b/searchlib/src/apps/tests/btreestress_test.cpp
index e6ef0740fc3..a39416c2227 100644
--- a/searchlib/src/apps/tests/btreestress_test.cpp
+++ b/searchlib/src/apps/tests/btreestress_test.cpp
@@ -6,7 +6,7 @@
 #include <vespa/vespalib/btree/btreenodeallocator.h>
 #include <vespa/vespalib/btree/btree.h>
 #include <vespa/vespalib/btree/btreestore.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 
 #include <vespa/vespalib/btree/btreenodeallocator.hpp>
 #include <vespa/vespalib/btree/btreenode.hpp>
@@ -37,7 +37,7 @@ struct Fixture
     MyTreeIterator _writeItr;
     vespalib::ThreadStackExecutor _writer; // 1 write thread
     vespalib::ThreadStackExecutor _readers; // multiple reader threads
-    search::Rand48 _rnd;
+    vespalib::Rand48 _rnd;
     uint32_t _keyLimit;
     std::atomic<long> _readSeed;
     std::atomic<long> _doneWriteWork;
@@ -135,7 +135,7 @@ Fixture::remove(uint32_t key)
 void
 Fixture::readWork(uint32_t cnt)
 {
-    search::Rand48 rnd;
+    vespalib::Rand48 rnd;
     rnd.srand48(++_readSeed);
     uint32_t i;
     for (i = 0; i < cnt && _stopRead.load() == 0; ++i) {
@@ -159,7 +159,7 @@ Fixture::readWork()
 void
 Fixture::writeWork(uint32_t cnt)
 {
-    search::Rand48 &rnd(_rnd);
+    vespalib::Rand48 &rnd(_rnd);
     for (uint32_t i = 0; i < cnt; ++i) {
         uint32_t key = rnd.lrand48() % _keyLimit;
         if ((rnd.lrand48() & 1) == 0) {
diff --git a/searchlib/src/apps/tests/memoryindexstress_test.cpp b/searchlib/src/apps/tests/memoryindexstress_test.cpp
index 6bbd93bda84..041335b7ed1 100644
--- a/searchlib/src/apps/tests/memoryindexstress_test.cpp
+++ b/searchlib/src/apps/tests/memoryindexstress_test.cpp
@@ -20,7 +20,7 @@
 #include <vespa/searchlib/queryeval/fake_searchable.h>
 #include <vespa/searchlib/queryeval/searchiterator.h>
 #include <vespa/searchlib/test/index/mock_field_length_inspector.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vespa/vespalib/testkit/testapp.h>
 #include <vespa/vespalib/util/threadstackexecutor.h>
 #include <vespa/vespalib/util/sequencedtaskexecutor.h>
@@ -201,7 +201,7 @@ struct Fixture {
     uint32_t _readThreads;
     vespalib::ThreadStackExecutor _writer; // 1 write thread
     vespalib::ThreadStackExecutor _readers; // multiple reader threads
-    search::Rand48 _rnd;
+    vespalib::Rand48 _rnd;
     uint32_t _keyLimit;
     std::atomic<long> _readSeed;
     std::atomic<long> _doneWriteWork;
@@ -285,7 +285,7 @@ Fixture::~Fixture()
 void
 Fixture::readWork(uint32_t cnt)
 {
-    search::Rand48 rnd;
+    vespalib::Rand48 rnd;
     rnd.srand48(++_readSeed);
     uint32_t i;
     uint32_t emptyCount = 0;
@@ -345,7 +345,7 @@ Fixture::readWork()
 void
 Fixture::writeWork(uint32_t cnt)
 {
-    search::Rand48 &rnd(_rnd);
+    vespalib::Rand48 &rnd(_rnd);
     for (uint32_t i = 0; i < cnt; ++i) {
         uint32_t key = rnd.lrand48() % _keyLimit;
         if ((rnd.lrand48() & 1) == 0) {
diff --git a/searchlib/src/tests/attribute/attributefilewriter/attributefilewriter_test.cpp b/searchlib/src/tests/attribute/attributefilewriter/attributefilewriter_test.cpp
index 8d13987bb4f..eeabbf23c27 100644
--- a/searchlib/src/tests/attribute/attributefilewriter/attributefilewriter_test.cpp
+++ b/searchlib/src/tests/attribute/attributefilewriter/attributefilewriter_test.cpp
@@ -6,7 +6,7 @@
 #include <vespa/searchlib/attribute/attributefilebufferwriter.h>
 #include <vespa/searchlib/attribute/attribute_header.h>
 #include <vespa/searchlib/util/fileutil.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vespa/searchlib/common/tunefileinfo.h>
 #include <vespa/searchlib/common/fileheadercontext.h>
 #include <vespa/searchlib/index/dummyfileheadercontext.h>
@@ -77,7 +77,7 @@ TEST_F("Test that buffer writer passes on written data", Fixture)
     const size_t writerBufferSize = AttributeFileBufferWriter::BUFFER_SIZE;
     EXPECT_GREATER(mysize * sizeof(int), writerBufferSize);
     a.reserve(mysize);
-    search::Rand48 rnd;
+    vespalib::Rand48 rnd;
     for (uint32_t i = 0; i < mysize; ++i) {
         a.emplace_back(rnd.lrand48());
     }
diff --git a/searchlib/src/tests/attribute/enumeratedsave/enumeratedsave_test.cpp b/searchlib/src/tests/attribute/enumeratedsave/enumeratedsave_test.cpp
index 41313fc7c53..eeaf85472c3 100644
--- a/searchlib/src/tests/attribute/enumeratedsave/enumeratedsave_test.cpp
+++ b/searchlib/src/tests/attribute/enumeratedsave/enumeratedsave_test.cpp
@@ -227,7 +227,7 @@ void
 EnumeratedSaveTest::populate(IntegerAttribute &v, unsigned seed,
                              BasicType bt)
 {
-    search::Rand48 rnd;
+    vespalib::Rand48 rnd;
     IntegerAttribute::largeint_t mask(std::numeric_limits
                                       <IntegerAttribute::largeint_t>::max());
     switch (bt.type()) {
@@ -284,7 +284,7 @@ EnumeratedSaveTest::populate(FloatingPointAttribute &v, unsigned seed,
                              BasicType bt)
 {
     (void) bt;
-    search::Rand48 rnd;
+    vespalib::Rand48 rnd;
     rnd.srand48(seed);
     int weight = 1;
     for(size_t i(0), m(v.getNumDocs()); i < m; i++) {
diff --git a/searchlib/src/tests/attribute/multi_value_mapping/multi_value_mapping_test.cpp b/searchlib/src/tests/attribute/multi_value_mapping/multi_value_mapping_test.cpp
index 2f74e9d31f6..a936ba124ee 100644
--- a/searchlib/src/tests/attribute/multi_value_mapping/multi_value_mapping_test.cpp
+++ b/searchlib/src/tests/attribute/multi_value_mapping/multi_value_mapping_test.cpp
@@ -3,7 +3,7 @@
 #include <vespa/searchlib/attribute/multi_value_mapping.h>
 #include <vespa/searchlib/attribute/multi_value_mapping.hpp>
 #include <vespa/searchlib/attribute/not_implemented_attribute.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vespa/vespalib/gtest/gtest.h>
 #include <vespa/vespalib/stllike/hash_set.h>
 #include <vespa/vespalib/test/insertion_operators.h>
@@ -151,7 +151,7 @@ using IntMappingTest = MappingTestBase<int>;
 
 class CompactionIntMappingTest : public MappingTestBase<int>
 {
-    search::Rand48 _rnd;
+    vespalib::Rand48 _rnd;
     std::map<uint32_t, std::vector<int>> _refMapping;
 public:
     CompactionIntMappingTest()
diff --git a/searchlib/src/tests/attribute/postinglist/postinglist.cpp b/searchlib/src/tests/attribute/postinglist/postinglist.cpp
index 78b93e2b78b..37d76e4a9e8 100644
--- a/searchlib/src/tests/attribute/postinglist/postinglist.cpp
+++ b/searchlib/src/tests/attribute/postinglist/postinglist.cpp
@@ -7,7 +7,7 @@
 #include <vespa/vespalib/btree/btreeroot.hpp>
 #include <vespa/vespalib/btree/btreestore.hpp>
 #include <vespa/vespalib/datastore/datastore.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vespa/vespalib/testkit/testapp.h>
 #include <set>
 #include <map>
@@ -143,7 +143,7 @@ private:
     PostingList *_intPostings;
     STLValueTree *_stlTree;
 
-    Rand48 _randomGenerator;
+    vespalib::Rand48 _randomGenerator;
     uint32_t _generation;
 
     void
diff --git a/searchlib/src/tests/common/bitvector/bitvector_test.cpp b/searchlib/src/tests/common/bitvector/bitvector_test.cpp
index 409cc9f2725..db29ab9881f 100644
--- a/searchlib/src/tests/common/bitvector/bitvector_test.cpp
+++ b/searchlib/src/tests/common/bitvector/bitvector_test.cpp
@@ -8,7 +8,7 @@
 #include <vespa/searchlib/common/bitvectoriterator.h>
 #include <vespa/searchlib/fef/termfieldmatchdata.h>
 #include <vespa/searchlib/fef/termfieldmatchdataarray.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <algorithm>
 
 using namespace search;
@@ -81,7 +81,7 @@ myCountInterval(const BitVector &bv, uint32_t low, uint32_t high)
 }
 
 void
-scan(uint32_t count, uint32_t offset, uint32_t size, Rand48 &rnd)
+scan(uint32_t count, uint32_t offset, uint32_t size, vespalib::Rand48 &rnd)
 {
     std::vector<uint32_t> lids;
     lids.reserve(count);
@@ -110,7 +110,7 @@ scan(uint32_t count, uint32_t offset, uint32_t size, Rand48 &rnd)
 void
 scanWithOffset(uint32_t offset)
 {
-    Rand48 rnd;
+    vespalib::Rand48 rnd;
 
     rnd.srand48(32);
     scan(10,      offset, 1000000, rnd);
diff --git a/searchlib/src/tests/diskindex/fieldwriter/fieldwriter_test.cpp b/searchlib/src/tests/diskindex/fieldwriter/fieldwriter_test.cpp
index ef55ea60c2b..15a53497db9 100644
--- a/searchlib/src/tests/diskindex/fieldwriter/fieldwriter_test.cpp
+++ b/searchlib/src/tests/diskindex/fieldwriter/fieldwriter_test.cpp
@@ -1,7 +1,7 @@
 // Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 
 #include <vespa/searchlib/common/bitvector.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vespa/searchlib/test/fakedata/fakeword.h>
 #include <vespa/searchlib/test/fakedata/fakewordset.h>
 #include <vespa/searchlib/index/docidandfeatures.h>
@@ -99,7 +99,7 @@ private:
     FakeWordSet _wordSet;
     FakeWordSet _wordSet2;
 public:
-    search::Rand48 _rnd;
+    vespalib::Rand48 _rnd;
 
 private:
     void Usage();
diff --git a/searchlib/src/tests/diskindex/pagedict4/pagedict4test.cpp b/searchlib/src/tests/diskindex/pagedict4/pagedict4test.cpp
index e914fe7c559..6cc2f318f4b 100644
--- a/searchlib/src/tests/diskindex/pagedict4/pagedict4test.cpp
+++ b/searchlib/src/tests/diskindex/pagedict4/pagedict4test.cpp
@@ -1,7 +1,7 @@
 // Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 
 #include <vespa/searchlib/bitcompression/compression.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vespa/searchlib/index/schemautil.h>
 #include <vespa/searchlib/bitcompression/countcompression.h>
 #include <vespa/searchlib/bitcompression/pagedict4.h>
@@ -54,7 +54,7 @@ using RandReader = search::diskindex::test::PageDict4MemRandReader;
 class PageDict4TestApp : public FastOS_Application
 {
 public:
-    search::Rand48 _rnd;
+    vespalib::Rand48 _rnd;
     bool _stress;
     bool _emptyWord;
     bool _firstWordForcedCommon;
@@ -206,7 +206,7 @@ deDup(std::vector<uint32_t> &v)
 
 
 static WordIndexCounts
-makeIndex(search::Rand48 &rnd, bool forceCommon)
+makeIndex(vespalib::Rand48 &rnd, bool forceCommon)
 {
     uint64_t bitLength = 10;
     uint32_t numDocs = 1;
@@ -219,7 +219,7 @@ makeIndex(search::Rand48 &rnd, bool forceCommon)
 
 
 void
-makeIndexes(search::Rand48 &rnd,
+makeIndexes(vespalib::Rand48 &rnd,
             WordIndexCounts &counts,
             bool forceCommon)
 {
@@ -229,7 +229,7 @@ makeIndexes(search::Rand48 &rnd,
 
 static void
 makeWords(std::vector<WordCounts> &v,
-          search::Rand48 &rnd,
+          vespalib::Rand48 &rnd,
           uint32_t numWordIds,
           uint32_t tupleCount,
           bool emptyWord,
@@ -355,7 +355,7 @@ checkCounts(const std::string &word,
 
 void
 testWords(const std::string &logname,
-          search::Rand48 &rnd,
+          vespalib::Rand48 &rnd,
           uint64_t numWordIds,
           uint32_t tupleCount,
           uint32_t chunkSize,
diff --git a/searchlib/src/tests/features/beta/beta_features.cpp b/searchlib/src/tests/features/beta/beta_features.cpp
index 617bf2fb073..89a72fab6fc 100644
--- a/searchlib/src/tests/features/beta/beta_features.cpp
+++ b/searchlib/src/tests/features/beta/beta_features.cpp
@@ -31,7 +31,7 @@
 #include <vespa/searchlib/fef/featurenamebuilder.h>
 #include <vespa/searchlib/fef/indexproperties.h>
 #include <vespa/searchlib/fef/test/plugin/setup.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vespa/searchlib/fef/test/ftlib.h>
 #include <vespa/vespalib/util/stringfmt.h>
 
diff --git a/searchlib/src/tests/features/prod_features.cpp b/searchlib/src/tests/features/prod_features.cpp
index 1c07c81bc2f..3f71c9f85ea 100644
--- a/searchlib/src/tests/features/prod_features.cpp
+++ b/searchlib/src/tests/features/prod_features.cpp
@@ -40,7 +40,7 @@
 #include <vespa/searchlib/fef/queryproperties.h>
 #include <vespa/searchlib/fef/test/plugin/setup.h>
 #include <vespa/searchlib/fef/test/dummy_dependency_handler.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vespa/vespalib/util/stringfmt.h>
 #include <vespa/vespalib/geo/zcurve.h>
 #include <vespa/vespalib/util/string_hash.h>
@@ -1747,7 +1747,7 @@ Test::testRandom()
         FtFeatureTest ft(_factory, "random");
         ft.getIndexEnv().getProperties().add("random.seed", "100");
         ASSERT_TRUE(ft.setup());
-        search::Rand48 rnd;
+        vespalib::Rand48 rnd;
         rnd.srand48(100);
         for (uint32_t i = 0; i < 5; ++i) {
             feature_t exp = static_cast<feature_t>(rnd.lrand48()) / static_cast<feature_t>(0x80000000u);
@@ -1770,7 +1770,7 @@ Test::testRandom()
         FtFeatureTest ft(_factory, "random.match");
         ft.getQueryEnv().getProperties().add("random.match.seed", "100");
         ASSERT_TRUE(ft.setup());
-        search::Rand48 rnd;
+        vespalib::Rand48 rnd;
         for (uint32_t i = 1; i <= 5; ++i) {
             rnd.srand48(100 + i); // seed + lid
             feature_t exp = static_cast<feature_t>(rnd.lrand48()) / static_cast<feature_t>(0x80000000u);
diff --git a/searchlib/src/tests/postinglistbm/posting_list_test.cpp b/searchlib/src/tests/postinglistbm/posting_list_test.cpp
index a7d810cb1a1..845201772f8 100644
--- a/searchlib/src/tests/postinglistbm/posting_list_test.cpp
+++ b/searchlib/src/tests/postinglistbm/posting_list_test.cpp
@@ -5,7 +5,7 @@
 #include <vespa/searchlib/test/fakedata/fakeword.h>
 #include <vespa/searchlib/test/fakedata/fakewordset.h>
 #include <vespa/searchlib/test/fakedata/fpfactory.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vespa/vespalib/gtest/gtest.h>
 #include <cinttypes>
 
@@ -66,7 +66,7 @@ struct PostingListTest : public ::testing::Test {
     FakeWordUP word3;
     FakeWordUP word4;
     FakeWordUP word5;
-    search::Rand48 rnd;
+    vespalib::Rand48 rnd;
 
     PostingListTest()
         : num_docs(36000),
diff --git a/searchlib/src/tests/postinglistbm/postinglistbm.cpp b/searchlib/src/tests/postinglistbm/postinglistbm.cpp
index 16b8e9cd7f5..0ac3f15e015 100644
--- a/searchlib/src/tests/postinglistbm/postinglistbm.cpp
+++ b/searchlib/src/tests/postinglistbm/postinglistbm.cpp
@@ -10,7 +10,7 @@
 #include <vespa/searchlib/test/fakedata/fakeword.h>
 #include <vespa/searchlib/test/fakedata/fakewordset.h>
 #include <vespa/searchlib/test/fakedata/fpfactory.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 
 #include <vespa/log/log.h>
 
@@ -42,7 +42,7 @@ private:
     bool _unpack;
 
 public:
-    search::Rand48 _rnd;
+    vespalib::Rand48 _rnd;
 
 public:
     PostingListBM();
diff --git a/searchlib/src/tests/postinglistbm/stress_runner.cpp b/searchlib/src/tests/postinglistbm/stress_runner.cpp
index 9c78515a03f..fd12e9b5aa9 100644
--- a/searchlib/src/tests/postinglistbm/stress_runner.cpp
+++ b/searchlib/src/tests/postinglistbm/stress_runner.cpp
@@ -33,7 +33,7 @@ private:
 
     StressMaster &operator=(const StressMaster &);
 
-    search::Rand48 &_rnd;
+    vespalib::Rand48 &_rnd;
     uint32_t _numDocs;
     std::vector<std::string> _postingTypes;
     StressRunner::OperatorType _operatorType;
@@ -62,7 +62,7 @@ private:
     std::vector<Task> _tasks;
 
 public:
-    StressMaster(search::Rand48 &rnd,
+    StressMaster(vespalib::Rand48 &rnd,
                  FakeWordSet &wordSet,
                  const std::vector<std::string> &postingType,
                  StressRunner::OperatorType operatorType,
@@ -129,7 +129,7 @@ public:
 };
 
 
-StressMaster::StressMaster(search::Rand48 &rnd,
+StressMaster::StressMaster(vespalib::Rand48 &rnd,
                            FakeWordSet &wordSet,
                            const std::vector<std::string> &postingTypes,
                            StressRunner::OperatorType operatorType,
@@ -420,7 +420,7 @@ OrStressWorker::run_task(const FakePosting& f1, const FakePosting& f2, uint32_t
 }
 
 void
-StressRunner::run(search::Rand48 &rnd,
+StressRunner::run(vespalib::Rand48 &rnd,
                   FakeWordSet &wordSet,
                   const std::vector<std::string> &postingTypes,
                   OperatorType operatorType,
diff --git a/searchlib/src/tests/postinglistbm/stress_runner.h b/searchlib/src/tests/postinglistbm/stress_runner.h
index d4974bc969e..249645f70aa 100644
--- a/searchlib/src/tests/postinglistbm/stress_runner.h
+++ b/searchlib/src/tests/postinglistbm/stress_runner.h
@@ -4,12 +4,9 @@
 #include <string>
 #include <vector>
 
-namespace search {
-class Rand48;
+namespace vespalib { class Rand48; }
 
-namespace fakedata { class FakeWordSet; }
-
-}
+namespace search::fakedata { class FakeWordSet; }
 
 namespace postinglistbm {
 
@@ -21,7 +18,7 @@ public:
         Or
     };
 
-    static void run(search::Rand48 &rnd,
+    static void run(vespalib::Rand48 &rnd,
                     search::fakedata::FakeWordSet &wordSet,
                     const std::vector<std::string> &postingTypes,
                     OperatorType operatorType,
diff --git a/searchlib/src/tests/queryeval/sparse_vector_benchmark/sparse_vector_benchmark_test.cpp b/searchlib/src/tests/queryeval/sparse_vector_benchmark/sparse_vector_benchmark_test.cpp
index a8aab279a98..1cf39183206 100644
--- a/searchlib/src/tests/queryeval/sparse_vector_benchmark/sparse_vector_benchmark_test.cpp
+++ b/searchlib/src/tests/queryeval/sparse_vector_benchmark/sparse_vector_benchmark_test.cpp
@@ -9,7 +9,7 @@
 #include <vespa/searchlib/queryeval/andnotsearch.h>
 #include <vespa/searchlib/queryeval/andsearch.h>
 #include <vespa/searchlib/queryeval/dot_product_search.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vespa/searchlib/queryeval/orsearch.h>
 #include <vespa/searchlib/queryeval/simpleresult.h>
 #include <vespa/searchlib/queryeval/wand/weak_and_search.h>
diff --git a/searchlib/src/tests/transactionlogstress/translogstress.cpp b/searchlib/src/tests/transactionlogstress/translogstress.cpp
index 74e48081e17..81a3006dbff 100644
--- a/searchlib/src/tests/transactionlogstress/translogstress.cpp
+++ b/searchlib/src/tests/transactionlogstress/translogstress.cpp
@@ -3,7 +3,7 @@
 #include <vespa/vespalib/util/stringfmt.h>
 #include <vespa/searchlib/transactionlog/translogserver.h>
 #include <vespa/searchlib/transactionlog/translogclient.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vespa/searchlib/util/runnable.h>
 #include <vespa/searchlib/index/dummyfileheadercontext.h>
 #include <vespa/fastos/app.h>
@@ -37,7 +37,7 @@ using Visitor = TransLogClient::Visitor;
 class BufferGenerator
 {
 private:
-    Rand48 _rnd;
+    vespalib::Rand48 _rnd;
     uint32_t _minStrLen;
     uint32_t _maxStrLen;
 
@@ -71,7 +71,7 @@ BufferGenerator::getRandomBuffer()
 class EntryGenerator
 {
 private:
-    Rand48 _rnd;
+    vespalib::Rand48 _rnd;
     long _baseSeed;
     BufferGenerator _bufferGenerator;
     const std::vector<nbostream> * _buffers;
@@ -93,7 +93,7 @@ public:
     };
     SerialNum getRandomSerialNum(SerialNum begin, SerialNum end);
     Packet::Entry getRandomEntry(SerialNum num);
-    Rand48 & getRnd() { return _rnd; }
+    vespalib::Rand48 & getRnd() { return _rnd; }
     void setBuffers(const std::vector<nbostream> & buffers) {
         _buffers = &buffers;
     }
diff --git a/searchlib/src/tests/util/bufferwriter/bufferwriter_test.cpp b/searchlib/src/tests/util/bufferwriter/bufferwriter_test.cpp
index 33afa67e660..8787712663d 100644
--- a/searchlib/src/tests/util/bufferwriter/bufferwriter_test.cpp
+++ b/searchlib/src/tests/util/bufferwriter/bufferwriter_test.cpp
@@ -4,7 +4,7 @@
 #include <vespa/vespalib/stllike/string.h>
 #include <vespa/vespalib/util/bufferwriter.h>
 #include <vespa/searchlib/util/drainingbufferwriter.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 
 namespace search {
 
@@ -130,7 +130,7 @@ TEST("Test that bufferwriter passes on written data")
     const size_t drainerBufferSize = DrainingBufferWriter::BUFFER_SIZE;
     EXPECT_GREATER(mysize * sizeof(int), drainerBufferSize);
     a.reserve(mysize);
-    search::Rand48 rnd;
+    vespalib::Rand48 rnd;
     for (uint32_t i = 0; i < mysize; ++i) {
         a.emplace_back(rnd.lrand48());
     }
diff --git a/searchlib/src/vespa/searchlib/features/randomfeature.h b/searchlib/src/vespa/searchlib/features/randomfeature.h
index 8c94b71071f..3a93e77d4d0 100644
--- a/searchlib/src/vespa/searchlib/features/randomfeature.h
+++ b/searchlib/src/vespa/searchlib/features/randomfeature.h
@@ -3,7 +3,7 @@
 #pragma once
 
 #include <vespa/searchlib/fef/blueprint.h>
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 
 namespace search::features {
 
@@ -12,8 +12,8 @@ namespace search::features {
  **/
 class RandomExecutor : public search::fef::FeatureExecutor {
 private:
-    Rand48   _rnd;       // seeded once per query
-    Rand48   _matchRnd;  // seeded once per match
+    vespalib::Rand48   _rnd;       // seeded once per query
+    vespalib::Rand48   _matchRnd;  // seeded once per match
     uint64_t _matchSeed;
 
 public:
diff --git a/searchlib/src/vespa/searchlib/test/fakedata/fakeword.cpp b/searchlib/src/vespa/searchlib/test/fakedata/fakeword.cpp
index 19080acaad3..4681861dd73 100644
--- a/searchlib/src/vespa/searchlib/test/fakedata/fakeword.cpp
+++ b/searchlib/src/vespa/searchlib/test/fakedata/fakeword.cpp
@@ -31,7 +31,7 @@ namespace fakedata
 static void
 fillbitset(search::BitVector *bitvector,
            unsigned int size,
-           search::Rand48 &rnd)
+           vespalib::Rand48 &rnd)
 {
     unsigned int range;
     unsigned int idx;
@@ -70,7 +70,7 @@ static void
 fillcorrelatedbitset(search::BitVector &bitvector,
                      unsigned int size,
                      const FakeWord &otherword,
-                     search::Rand48 &rnd)
+                     vespalib::Rand48 &rnd)
 {
     const FakeWord::DocWordFeatureList &opostings = otherword._postings;
 
@@ -145,7 +145,7 @@ FakeWord::FakeWord(uint32_t docIdLimit,
     for (uint32_t docId : docIds) {
         bitmap->setBit(docId);
     }
-    search::Rand48 rnd;
+    vespalib::Rand48 rnd;
     fakeup(*bitmap, rnd, _postings, _wordPosFeatures);
 }
 
@@ -153,7 +153,7 @@ FakeWord::FakeWord(uint32_t docIdLimit,
                    uint32_t wordDocs,
                    uint32_t tempWordDocs,
                    const std::string &name,
-                   search::Rand48 &rnd,
+                   vespalib::Rand48 &rnd,
                    const PosOccFieldsParams &fieldsParams,
                    uint32_t packedIndex)
     : _postings(),
@@ -181,7 +181,7 @@ FakeWord::FakeWord(uint32_t docIdLimit,
                    const std::string &name,
                    const FakeWord &otherWord,
                    size_t overlapDocs,
-                   search::Rand48 &rnd,
+                   vespalib::Rand48 &rnd,
                    const PosOccFieldsParams &fieldsParams,
                    uint32_t packedIndex)
     : _postings(),
@@ -211,7 +211,7 @@ FakeWord::~FakeWord()
 
 void
 FakeWord::fakeup(search::BitVector &bitmap,
-                 search::Rand48 &rnd,
+                 vespalib::Rand48 &rnd,
                  DocWordFeatureList &postings,
                  DocWordPosFeatureList &wordPosFeatures)
 {
@@ -301,7 +301,7 @@ FakeWord::fakeup(search::BitVector &bitmap,
 
 
 void
-FakeWord::fakeupTemps(search::Rand48 &rnd,
+FakeWord::fakeupTemps(vespalib::Rand48 &rnd,
                       uint32_t docIdLimit,
                       uint32_t tempWordDocs)
 {
@@ -315,7 +315,7 @@ FakeWord::fakeupTemps(search::Rand48 &rnd,
 }
 
 void
-FakeWord::setupRandomizer(search::Rand48 &rnd)
+FakeWord::setupRandomizer(vespalib::Rand48 &rnd)
 {
     typedef DocWordFeatureList DWFL;
     Randomizer randomAdd;
diff --git a/searchlib/src/vespa/searchlib/test/fakedata/fakeword.h b/searchlib/src/vespa/searchlib/test/fakedata/fakeword.h
index 30f960c2d4c..ffe9e2e54d0 100644
--- a/searchlib/src/vespa/searchlib/test/fakedata/fakeword.h
+++ b/searchlib/src/vespa/searchlib/test/fakedata/fakeword.h
@@ -1,7 +1,7 @@
 // Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 #pragma once
 
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vector>
 #include <vespa/searchlib/queryeval/searchiterator.h>
 #include <vespa/searchlib/bitcompression/compression.h>
@@ -156,16 +156,16 @@ public:
 
     void
     fakeup(search::BitVector &bitmap,
-           search::Rand48 &rnd,
+           vespalib::Rand48 &rnd,
            DocWordFeatureList &postings,
            DocWordPosFeatureList &wordPosFeatures);
 
     void
-    fakeupTemps(search::Rand48 &rnd,
+    fakeupTemps(vespalib::Rand48 &rnd,
                 uint32_t docIdLimit,
                 uint32_t tempWordDocs);
 
-    void setupRandomizer(search::Rand48 &rnd);
+    void setupRandomizer(vespalib::Rand48 &rnd);
 
     const DocWordFeature &
     getDocWordFeature(const Randomizer &r) const
@@ -220,7 +220,7 @@ public:
              uint32_t wordDocs,
              uint32_t tempWordDocs,
              const std::string &name,
-             search::Rand48 &rnd,
+             vespalib::Rand48 &rnd,
              const PosOccFieldsParams &fieldsParams,
              uint32_t packedIndex);
 
@@ -230,7 +230,7 @@ public:
              const std::string &name,
              const FakeWord &otherWord,
              size_t overlapDocs,
-             search::Rand48 &rnd,
+             vespalib::Rand48 &rnd,
              const PosOccFieldsParams &fieldsParams,
              uint32_t packedIndex);
 
diff --git a/searchlib/src/vespa/searchlib/test/fakedata/fakewordset.cpp b/searchlib/src/vespa/searchlib/test/fakedata/fakewordset.cpp
index ba691e507fa..6bb39598fab 100644
--- a/searchlib/src/vespa/searchlib/test/fakedata/fakewordset.cpp
+++ b/searchlib/src/vespa/searchlib/test/fakedata/fakewordset.cpp
@@ -77,7 +77,7 @@ FakeWordSet::setupParams(bool hasElements,
 }
 
 void
-FakeWordSet::setupWords(search::Rand48 &rnd,
+FakeWordSet::setupWords(vespalib::Rand48 &rnd,
                         uint32_t numDocs,
                         uint32_t commonDocFreq,
                         uint32_t numWordsPerWordClass)
@@ -86,7 +86,7 @@ FakeWordSet::setupWords(search::Rand48 &rnd,
 }
 
 void
-FakeWordSet::setupWords(search::Rand48 &rnd,
+FakeWordSet::setupWords(vespalib::Rand48 &rnd,
                         uint32_t numDocs,
                         uint32_t commonDocFreq,
                         uint32_t mediumDocFreq,
diff --git a/searchlib/src/vespa/searchlib/test/fakedata/fakewordset.h b/searchlib/src/vespa/searchlib/test/fakedata/fakewordset.h
index 3dcf47cf8c8..de7efef1517 100644
--- a/searchlib/src/vespa/searchlib/test/fakedata/fakewordset.h
+++ b/searchlib/src/vespa/searchlib/test/fakedata/fakewordset.h
@@ -6,7 +6,7 @@
 #include <vespa/searchlib/bitcompression/posocccompression.h>
 #include <vespa/searchlib/bitcompression/posocc_fields_params.h>
 
-namespace search { class Rand48; }
+namespace vespalib { class Rand48; }
 
 namespace search::fakedata {
 
@@ -46,12 +46,12 @@ public:
     void setupParams(bool hasElements,
                      bool hasElementWeights);
 
-    void setupWords(search::Rand48 &rnd,
+    void setupWords(vespalib::Rand48 &rnd,
                     uint32_t numDocs,
                     uint32_t commonDocFreq,
                     uint32_t numWordsPerWordClass);
 
-    void setupWords(search::Rand48 &rnd,
+    void setupWords(vespalib::Rand48 &rnd,
                     uint32_t numDocs,
                     uint32_t commonDocFreq,
                     uint32_t mediumDocFreq,
diff --git a/searchlib/src/vespa/searchlib/util/rand48.h b/searchlib/src/vespa/searchlib/util/rand48.h
deleted file mode 100644
index 8ef529493c1..00000000000
--- a/searchlib/src/vespa/searchlib/util/rand48.h
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
-
-#pragma once
-
-#include <cstdlib>
-#include <cstdint>
-
-namespace search {
-
-/*
- * Simple random generator based on lrand48() spec.
- */
-class Rand48
-{
-private:
-    uint64_t _state;
-public:
-    void
-    srand48(long seed)
-    {
-        _state = ((static_cast<uint64_t>(seed & 0xffffffffu)) << 16) + 0x330e;
-    }
-
-    Rand48()
-        : _state(0)
-    {
-        srand48(0x1234abcd);
-    };
-    void iterate() {
-        _state = (UINT64_C(0x5DEECE66D) * _state + 0xb) &
-                 UINT64_C(0xFFFFFFFFFFFF);
-    }
-    /*
-     * Return value from 0 to 2^31 - 1
-     */
-    long lrand48() {
-        iterate();
-        return static_cast<long>(_state >> 17);
-    }
-};
-
-} // namespace search
-
diff --git a/searchlib/src/vespa/searchlib/util/random_normal.h b/searchlib/src/vespa/searchlib/util/random_normal.h
index 74596066312..c74935de02f 100644
--- a/searchlib/src/vespa/searchlib/util/random_normal.h
+++ b/searchlib/src/vespa/searchlib/util/random_normal.h
@@ -2,7 +2,7 @@
 
 #pragma once
 
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <cmath>
 
 namespace search {
@@ -14,7 +14,7 @@ namespace search {
 class RandomNormal
 {
 private:
-    Rand48    _rnd;
+    vespalib::Rand48    _rnd;
     double    _mean;
     double    _stddev;
 
diff --git a/searchlib/src/vespa/searchlib/util/randomgenerator.h b/searchlib/src/vespa/searchlib/util/randomgenerator.h
index 40305a1d02d..ac23b387740 100644
--- a/searchlib/src/vespa/searchlib/util/randomgenerator.h
+++ b/searchlib/src/vespa/searchlib/util/randomgenerator.h
@@ -2,7 +2,7 @@
 
 #pragma once
 
-#include <vespa/searchlib/util/rand48.h>
+#include <vespa/vespalib/util/rand48.h>
 #include <vespa/vespalib/stllike/string.h>
 #include <vector>
 #include <cassert>
@@ -11,7 +11,7 @@ namespace search {
 class RandomGenerator
 {
 private:
-    Rand48 _rnd;
+    vespalib::Rand48 _rnd;
 
 public:
     RandomGenerator() : _rnd() {}