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mirror of https://github.com/mariadb-corporation/mariadb-columnstore-engine.git synced 2025-07-30 19:23:07 +03:00

MCOL-641 This commit introduces GTest Suite into CS.

Binary NULL magic now consists of a series of BINARYEMPTYROW-s + BINARYNULL
in the end.

ByteStream now has hexbyte alias.

Added ColumnCommand::getEmptyRowValue to support 16 byte EMPTY values.
This commit is contained in:
Roman Nozdrin
2020-02-19 18:50:48 +00:00
parent 31d597d87e
commit f73de30427
13 changed files with 283 additions and 87 deletions

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@ -148,6 +148,13 @@ if (NOT CURL_FOUND)
return()
endif()
IF (WITH_GTEST)
INCLUDE (FindGTest)
IF (NOT GTEST_FOUND)
MESSAGE(FATAL_ERROR "GSuite libs not found but are requested. Please install them or build.")
ENDIF()
SET (GTEST_LIBRARIES ${GTEST_LIBRARY} ${GTESTMAIN_LIBRARY} ${PTHREAD_LIBRARY})
ENDIF()
FIND_PROGRAM(AWK_EXECUTABLE awk DOC "path to the awk executable")
if(NOT AWK_EXECUTABLE)

38
cmake/FindGTest.cmake Normal file
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@ -0,0 +1,38 @@
find_path(GTEST_ROOT_DIR
NAMES include/gtest/gtest.h
)
find_library(GTEST_LIBRARY
NAMES gtest
HINTS ${GTEST_ROOT_DIR}/lib
)
find_library(GTESTMAIN_LIBRARY
NAMES gtest_main
HINTS ${GTEST_ROOT_DIR}/lib
)
find_library(PTHREAD_LIBRARY
NAMES pthread
HINTS ${GTEST_ROOT_DIR}/lib
)
find_path(GTEST_INCLUDE_DIR
NAMES gtest.h
HINTS ${GTEST_ROOT_DIR}/include
)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(GTest DEFAULT_MSG
GTEST_LIBRARY
GTESTMAIN_LIBRARY
PTHREAD_LIBRARY
GTEST_INCLUDE_DIR
)
mark_as_advanced(
GTEST_ROOT_DIR
GTEST_LIBRARIES
GTEST_INCLUDE_DIR
)

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@ -285,7 +285,6 @@ template<>
inline bool isEmptyVal<16>(uint8_t type, const uint8_t* ival) // For BINARY
{
const uint64_t* val = reinterpret_cast<const uint64_t*>(ival);
// WIP ugly speed hack
return ((val[0] == joblist::BINARYEMPTYROW) && (val[1] == joblist::BINARYEMPTYROW));
}
@ -415,15 +414,15 @@ template<>
inline bool isNullVal<16>(uint8_t type, const uint8_t* ival) // For BINARY
{
const uint64_t* val = reinterpret_cast<const uint64_t*>(ival);
return ((val[0] == joblist::BINARYNULL) && (val[1] == joblist::BINARYNULL));
return ((val[0] == joblist::BINARYEMPTYROW) && (val[1] == joblist::BINARYNULL));
}
template<>
inline bool isNullVal<32>(uint8_t type, const uint8_t* ival) // For BINARY
{
const uint64_t* val = reinterpret_cast<const uint64_t*>(ival);
return ((val[0] == joblist::BINARYNULL) && (val[1] == joblist::BINARYNULL)
&& (val[2] == joblist::BINARYNULL) && (val[3] == joblist::BINARYNULL));
return ((val[0] == joblist::BINARYEMPTYROW) && (val[1] == joblist::BINARYEMPTYROW)
&& (val[2] == joblist::BINARYEMPTYROW) && (val[3] == joblist::BINARYNULL));
}
template<>
@ -614,7 +613,7 @@ inline bool isMinMaxValid(const NewColRequestHeader* in)
case CalpontSystemCatalog::DECIMAL:
case CalpontSystemCatalog::UDECIMAL:
return (in->DataSize <= 16);
return (in->DataSize <= 16 );
default:
return false;

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@ -165,6 +165,7 @@ void ColumnCommand::loadData()
{
// fill remaining blocks with empty values when col scan
int blockLen = BLOCK_SIZE / colType.colWidth;
ByteStream::hexbyte* hPtr = NULL;
ByteStream::octbyte* oPtr = NULL;
ByteStream::quadbyte* qPtr = NULL;
ByteStream::byte* bPtr = NULL;
@ -183,6 +184,10 @@ void ColumnCommand::loadData()
if (colType.colWidth == 8)
oPtr = reinterpret_cast<ByteStream::octbyte*>(&bpp->blockData[i * BLOCK_SIZE]);
if (colType.colWidth == 16)
hPtr = reinterpret_cast<ByteStream::hexbyte*>(&bpp->blockData[i * BLOCK_SIZE]);
for (int idx = 0; idx < blockLen; idx++)
{
if (bPtr && colType.colWidth == 1)
@ -208,9 +213,7 @@ void ColumnCommand::loadData()
}
else if (colType.colWidth == 16)
{
uint64_t *ptr = reinterpret_cast<uint64_t*>(&bpp->blockData[i * BLOCK_SIZE] + (idx*16) );
*ptr = joblist::BINARYEMPTYROW;
*(ptr + 1) = joblist::BINARYEMPTYROW;
getEmptyRowValue(colType.colDataType, colType.colWidth, &hPtr[idx]);
}
}
@ -965,7 +968,7 @@ void ColumnCommand::enableFilters()
* RETURN:
* emptyVal - the value of empty row
***********************************************************/
uint64_t ColumnCommand::getEmptyRowValue( const execplan::CalpontSystemCatalog::ColDataType dataType, const int width ) const
const uint64_t ColumnCommand::getEmptyRowValue( const CSCDataType dataType, const int width ) const
{
uint64_t emptyVal = 0;
int offset;
@ -1056,6 +1059,16 @@ uint64_t ColumnCommand::getEmptyRowValue( const execplan::CalpontSystemCatalog::
return emptyVal;
}
void ColumnCommand::getEmptyRowValue(const CSCDataType dataType,
const int width, messageqcpp::ByteStream::hexbyte* space) const
{
uint64_t *ptr = reinterpret_cast<uint64_t*>(space);
ptr[0] = joblist::BINARYEMPTYROW;
ptr[1] = joblist::BINARYEMPTYROW;
}
void ColumnCommand::getLBIDList(uint32_t loopCount, vector<int64_t>* lbids)
{
int64_t firstLBID = lbid, lastLBID = firstLBID + (loopCount * colType.colWidth) - 1, i;

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@ -34,6 +34,8 @@
#include "command.h"
#include "calpontsystemcatalog.h"
using CSCDataType = execplan::CalpontSystemCatalog::ColDataType;
namespace primitiveprocessor
{
@ -82,8 +84,10 @@ public:
makeAbsRids = m;
}
bool willPrefetch();
uint64_t getEmptyRowValue( const execplan::CalpontSystemCatalog::ColDataType dataType, const int width ) const;
int64_t getLastLbid();
const uint64_t getEmptyRowValue( const CSCDataType dataType, const int width ) const;
void getEmptyRowValue(const CSCDataType dataType,
const int width, messageqcpp::ByteStream::hexbyte* space) const;
const int64_t getLastLbid();
void getLBIDList(uint32_t loopCount, std::vector<int64_t>* lbids);
virtual SCommand duplicate();

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@ -19,6 +19,7 @@
#define UTILS_COLWIDTH_H
#define MAXLEGACYWIDTH 8
#define MAXCOLUMNWIDTH 16
namespace utils
{

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@ -236,12 +236,12 @@ ByteStream& ByteStream::operator<<(const uint64_t o)
}
// WIP MCOL-641
ByteStream& ByteStream::operator<<(const unsigned __int128 o)
ByteStream& ByteStream::operator<<(const uint128_t o)
{
if (fBuf == 0 || (fCurInPtr - fBuf + 16U > fMaxLen + ISSOverhead))
growBuf(fMaxLen + BlockSize);
*((unsigned __int128*) fCurInPtr) = o;
*((uint128_t*) fCurInPtr) = o;
fCurInPtr += 16;
return *this;
@ -332,7 +332,7 @@ ByteStream& ByteStream::operator>>(uint64_t& o)
}
// WIP MCOL-641
ByteStream& ByteStream::operator>>(unsigned __int128& o)
ByteStream& ByteStream::operator>>(uint128_t& o)
{
peek(o);
fCurOutPtr += 16;
@ -420,13 +420,13 @@ void ByteStream::peek(uint64_t& o) const
}
// WIP MCOL-641
void ByteStream::peek(unsigned __int128& o) const
void ByteStream::peek(uint128_t& o) const
{
if (length() < 16)
throw underflow_error("ByteStream>unsigned __int128: not enough data in stream to fill datatype");
throw underflow_error("ByteStream>uint128_t: not enough data in stream to fill datatype");
o = *((unsigned __int128*) fCurOutPtr);
o = *((uint128_t*) fCurOutPtr);
}
void ByteStream::peek(string& s) const

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@ -45,6 +45,8 @@ class ByteStreamTestSuite;
#define EXPORT
#endif
using uint128_t = unsigned __int128;
namespace messageqcpp
{
@ -74,6 +76,7 @@ public:
typedef uint16_t doublebyte;
typedef uint32_t quadbyte;
typedef uint64_t octbyte;
typedef uint128_t hexbyte;
typedef boost::uuids::uuid uuid;
/**
@ -147,7 +150,7 @@ public:
/**
* push an unsigned __int128 onto the end of the stream. The byte order is whatever the native byte order is.
*/
EXPORT ByteStream& operator<<(const unsigned __int128 o);
EXPORT ByteStream& operator<<(const uint128_t o);
/**
* push a float onto the end of the stream. The byte order is
* whatever the native byte order is.
@ -216,7 +219,7 @@ public:
/**
* extract an unsigned __int128 from the front of the stream. The byte order is whatever the native byte order is.
*/
EXPORT ByteStream& operator>>(unsigned __int128& o);
EXPORT ByteStream& operator>>(uint128_t& o);
/**
* extract a float from the front of the stream. The byte
* order is whatever the native byte order is.
@ -291,7 +294,7 @@ public:
/**
* Peek at an unsigned __int128 from the front of the stream. The byte order is whatever the native byte order is.
*/
EXPORT void peek(unsigned __int128& o) const;
EXPORT void peek(uint128_t& o) const;
/**
* Peek at a float from the front of the stream. The byte order
* is whatever the native byte order is.

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@ -16,3 +16,8 @@ target_link_libraries(rowgroup ${NETSNMP_LIBRARIES} funcexp)
install(TARGETS rowgroup DESTINATION ${ENGINE_LIBDIR} COMPONENT columnstore-engine)
if (WITH_ROWGROUP_UT)
add_executable(rowgroup_tests rowgroup-tests.cpp)
target_link_libraries(rowgroup_tests ${ENGINE_LDFLAGS} ${GTEST_LIBRARIES} ${ENGINE_EXEC_LIBS} ${MARIADB_CLIENT_LIBS})
install(TARGETS rowgroup_tests DESTINATION ${ENGINE_BINDIR} COMPONENT columnstore-platform)
endif()

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@ -227,6 +227,11 @@ inline uint64_t getBinaryNullValue()
return joblist::BINARYNULL;
}
inline uint64_t getBinaryEmptyValue()
{
return joblist::BINARYEMPTYROW;
}
}
@ -1173,10 +1178,11 @@ void RowAggregation::makeAggFieldsNull(Row& row)
{
// WIP This is only 1st part of the value
uint64_t nullValue = getBinaryNullValue();
uint64_t emptyValue = getBinaryEmptyValue();
uint32_t offset = row.getOffset(colOut);
row.setBinaryField_offset(&nullValue, sizeof(nullValue),
offset);
row.setBinaryField_offset(&nullValue, sizeof(nullValue),
row.setBinaryField_offset(&emptyValue, sizeof(nullValue),
offset+sizeof(nullValue));
}
break;

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@ -0,0 +1,110 @@
#include <gtest/gtest.h> // googletest header file
#include "rowgroup.h"
#include "columnwidth.h"
#include "joblisttypes.h"
#define WIDE_DEC_PRECISION 38
#define INITIAL_ROW_OFFSET 2
using int128_t = __int128;
using uint128_t = unsigned __int128;
class RowTest : public ::testing::Test {
protected:
void SetUp() override {
uint8_t width = utils::widthByPrecision(WIDE_DEC_PRECISION);
uint32_t oid =3001;
std::vector<uint32_t> offsets, roids, tkeys, cscale, cprecision;
std::vector<execplan::CalpontSystemCatalog::ColDataType> types;
offsets.push_back(INITIAL_ROW_OFFSET);
offsets.push_back(width+INITIAL_ROW_OFFSET);
offsets.push_back(width*2+INITIAL_ROW_OFFSET);
roids.push_back(oid); roids.push_back(oid+1);
tkeys.push_back(1); tkeys.push_back(1);
types.push_back(execplan::CalpontSystemCatalog::DECIMAL);
types.push_back(execplan::CalpontSystemCatalog::UDECIMAL);
cscale.push_back(0); cscale.push_back(0);
cprecision.push_back(WIDE_DEC_PRECISION);
cprecision.push_back(WIDE_DEC_PRECISION);
rowgroup::RowGroup inRG(roids.size(), //column count
offsets, //oldOffset
roids, // column oids
tkeys, //keys
types, // types
cscale, //scale
cprecision, // precision
20, // sTableThreshold
false //useStringTable
);
rg = inRG;
rgD.reinit(rg);
rg.setData(&rgD);
rg.initRow(&r);
rowSize = r.getSize();
rg.getRow(0, &r);
std::vector<int128_t> sValueVector;
std::vector<uint128_t> uValueVector;
int128_t nullValue = 0;
uint64_t* uint128_pod = reinterpret_cast<uint64_t*>(&nullValue);
uint128_pod[0] = joblist::BINARYEMPTYROW;
uint128_pod[1] = joblist::BINARYNULL;
sValueVector.push_back(nullValue);
sValueVector.push_back(-42);
sValueVector.push_back(-42*0xFFFFFFFFFFFFFFFFLL);
sValueVector.push_back(0);
sValueVector.push_back(nullValue-1);
uValueVector.push_back(nullValue);
uValueVector.push_back(42);
uValueVector.push_back(42*0xFFFFFFFFFFFFFFFFLL);
uValueVector.push_back(0);
uValueVector.push_back(nullValue);
uValueVector.push_back(nullValue-1);
for(size_t i = 0; i < sValueVector.size(); i++)
{
r.setBinaryField_offset(&sValueVector[i],
sizeof(sValueVector[0]), INITIAL_ROW_OFFSET);
r.setBinaryField_offset(&uValueVector[i],
sizeof(uValueVector[0]), INITIAL_ROW_OFFSET+width);
r.nextRow(rowSize);
}
rowCount = sValueVector.size();
}
// void TearDown() override {}
rowgroup::Row r;
rowgroup::RowGroup rg;
rowgroup::RGData rgD;
uint32_t rowSize;
size_t rowCount;
};
TEST_F(RowTest, NonNULLValuesCheck) {
rg.getRow(1, &r);
for (size_t i = 0; i <= rg.getRowCount(); i++)
{
EXPECT_FALSE(r.isNullValue(0));
EXPECT_FALSE(r.isNullValue(1));
r.nextRow(rowSize);
}
}
TEST_F(RowTest, NULLValuesCheck) {
rg.getRow(0, &r);
EXPECT_TRUE(r.isNullValue(0));
EXPECT_TRUE(r.isNullValue(1));
}
//Row::isNullValue_offset
//toString
//initToNull
//toCSV
//applyMapping
//setBinaryField remove Field1 and combine setBinaryField
//getBinaryField
//Remove from set/getIntFields Varbinary

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@ -848,7 +848,7 @@ void Row::initToNull()
case 16 :
{
uint64_t *dec = reinterpret_cast<uint64_t*>(&data[offsets[i]]);
dec[0] = joblist::BINARYNULL;
dec[0] = joblist::BINARYEMPTYROW;
dec[1] = joblist::BINARYNULL;
break;
}
@ -888,7 +888,7 @@ void Row::initToNull()
}
}
template<typename T, uint8_t cscT, uint32_t width>
template<cscDataType cscDT, uint32_t width>
inline bool Row::isNullValue_offset(uint32_t offset) const
{
ostringstream os;
@ -898,69 +898,76 @@ inline bool Row::isNullValue_offset(uint32_t offset) const
os << width << endl;
throw logic_error(os.str());
}
/*
// WIP how to make if that enables explicit template for two cscTypes?
// Method template resolution could impose some perf degradation
template<int64_t,(uint8_t)CalpontSystemCatalog::DECIMAL,16>
inline bool Row::isNullValue_offset(uint32_t offset) const
// WIP Method template resolution could impose some perf degradation
// Compare perf with switch-case
template<>
inline bool
Row::isNullValue_offset<execplan::CalpontSystemCatalog::BINARY,32>(
uint32_t offset) const
{
return (*reinterpret_cast<int64_t*>(&data[offset]) == static_cast<int64_t>(joblist::BIGINTNULL));
const int64_t *intPtr = reinterpret_cast<const int64_t*>(&data[offset]);
return ((intPtr[0] == static_cast<int64_t>(joblist::BINARYEMPTYROW)) &&
(intPtr[1] == static_cast<int64_t>(joblist::BINARYEMPTYROW)) &&
(intPtr[2] == static_cast<int64_t>(joblist::BINARYEMPTYROW)) &&
(intPtr[3] == static_cast<int64_t>(joblist::BINARYNULL)));
}
template<int64_t,CalpontSystemCatalog::UDECIMAL,16>
inline bool Row::isNullValue_offset(uint32_t offset) const
template<>
inline bool
Row::isNullValue_offset<execplan::CalpontSystemCatalog::BINARY,16>(
uint32_t offset) const
{
return (*reinterpret_cast<int64_t*>(&data[offset]) == static_cast<int64_t>(joblist::BIGINTNULL));
const int64_t *intPtr = reinterpret_cast<const int64_t*>(&data[offset]);
return ((intPtr[0] == static_cast<int64_t>(joblist::BINARYEMPTYROW))
&& (intPtr[1] == static_cast<int64_t>(joblist::BINARYNULL)));
}
template<int64_t,CalpontSystemCatalog::DECIMAL,8>
inline bool Row::isNullValue_offset(uint32_t offset) const
template<>
inline bool
Row::isNullValue_offset<execplan::CalpontSystemCatalog::DECIMAL,16>(
uint32_t offset) const
{
return (*reinterpret_cast<int64_t*>(&data[offset]) == static_cast<int64_t>(joblist::BIGINTNULL));
const int64_t *intPtr = reinterpret_cast<const int64_t*>(&data[offset]);
return ((intPtr[0] == static_cast<int64_t>(joblist::BINARYEMPTYROW))
&& (intPtr[1] == static_cast<int64_t>(joblist::BINARYNULL)));
}
template<int64_t,CalpontSystemCatalog::UDECIMAL,8>
inline bool Row::isNullValue_offset(uint32_t offset) const
template<>
inline bool
Row::isNullValue_offset<execplan::CalpontSystemCatalog::DECIMAL,8>(
uint32_t offset) const
{
return (*reinterpret_cast<int64_t*>(&data[offset]) == static_cast<int64_t>(joblist::BIGINTNULL));
return (*reinterpret_cast<int64_t*>(&data[offset])
== static_cast<int64_t>(joblist::BIGINTNULL));
}
template<uint8_t,CalpontSystemCatalog::UDECIMAL,1>
inline bool Row::isNullValue_offset(uint32_t offset) const
template<>
inline bool
Row::isNullValue_offset<execplan::CalpontSystemCatalog::DECIMAL,4>(
uint32_t offset) const
{
return (*reinterpret_cast<int32_t*>(&data[offset])
== static_cast<int32_t>(joblist::INTNULL));
}
template<>
inline bool
Row::isNullValue_offset<execplan::CalpontSystemCatalog::DECIMAL,2>(
uint32_t offset) const
{
return (*reinterpret_cast<int16_t*>(&data[offset])
== static_cast<int16_t>(joblist::SMALLINTNULL));
}
template<>
inline bool
Row::isNullValue_offset<execplan::CalpontSystemCatalog::DECIMAL,1>(
uint32_t offset) const
{
return (data[offset] == joblist::TINYINTNULL);
}
template<uint8_t,CalpontSystemCatalog::DECIMAL,1>
inline bool Row::isNullValue_offset(uint32_t offset) const
{
return (data[offset] == joblist::TINYINTNULL);
}
template<int16_t,CalpontSystemCatalog::UDECIMAL,2>
inline bool Row::isNullValue_offset(uint32_t offset) const
{
return (*reinterpret_cast<int16_t*>(&data[offset]) == static_cast<int16_t>(joblist::SMALLINTNULL));
}
template<int16_t,CalpontSystemCatalog::UDECIMAL,2>
inline bool Row::isNullValue_offset(uint32_t offset) const
{
return (*reinterpret_cast<int16_t*>(&data[offset]) == static_cast<int16_t>(joblist::SMALLINTNULL));
}
template<int32_t,CalpontSystemCatalog::UDECIMAL,4>
inline bool Row::isNullValue_offset(uint32_t offset) const
{
return (*reinterpret_cast<int32_t*>(&data[offset]) == static_cast<int32_t>(joblist::INTNULL));
}
template<int32_t,CalpontSystemCatalog::DECIMAL,4>
inline bool Row::isNullValue_offset(uint32_t offset) const
{
return (*reinterpret_cast<int32_t*>(&data[offset]) == static_cast<int32_t>(joblist::INTNULL));
}
*/
bool Row::isNullValue(uint32_t colIndex) const
{
switch (types[colIndex])
@ -1044,16 +1051,22 @@ bool Row::isNullValue(uint32_t colIndex) const
case CalpontSystemCatalog::DECIMAL:
case CalpontSystemCatalog::UDECIMAL:
{
uint32_t len = getColumnWidth(colIndex);
const int64_t *dec;
// WIP MCOL-641 Allmighty hack.
const uint32_t len = 16;
uint32_t* lenPtr = const_cast<uint32_t*>(&len);
*lenPtr = getColumnWidth(colIndex);
return isNullValue_offset
<execplan::CalpontSystemCatalog::DECIMAL,len>(offsets[colIndex]);
// WIP
/*
const int64_t *dec;
switch (len)
{
// MCOL-641
case 16:
dec = reinterpret_cast<const int64_t*>(&data[offsets[colIndex]]);
return ((dec[0] == static_cast<int64_t>(joblist::BINARYNULL))
&& (dec[1] == static_cast<int64_t>(joblist::BINARYNULL)));
return isNullValue_offset
<execplan::CalpontSystemCatalog::DECIMAL,len>(offsets[colIndex]);
case 1 :
return (data[offsets[colIndex]] == joblist::TINYINTNULL);
@ -1067,7 +1080,7 @@ bool Row::isNullValue(uint32_t colIndex) const
default:
return (*((int64_t*) &data[offsets[colIndex]]) == static_cast<int64_t>(joblist::BIGINTNULL));
}
*/
break;
}
@ -1112,12 +1125,11 @@ bool Row::isNullValue(uint32_t colIndex) const
case CalpontSystemCatalog::BINARY:
{
// When is null? I dont know. Wait for bitmap null empty implemtenttion ?
// Also still pendig rework discussed use pointers for empty null values
std::cout << __FILE__<< ":" << __LINE__ << " isNullValue value " << (*((uint64_t*) &data[offsets[colIndex]])) << std::endl;
//return false;
return (*((uint64_t*) &data[offsets[colIndex]]) == joblist::BINARYEMPTYROW);
const uint32_t len = 16;
uint32_t* lenPtr = const_cast<uint32_t*>(&len);
*lenPtr = getColumnWidth(colIndex);
return isNullValue_offset
<execplan::CalpontSystemCatalog::BINARY,len>(offsets[colIndex]);
}
default:

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@ -28,7 +28,6 @@
#ifndef ROWGROUP_H_
#define ROWGROUP_H_
#include <iostream>
#include <vector>
#include <string>
#include <stdexcept>
@ -72,7 +71,6 @@ using uint128_t = unsigned __int128;
namespace rowgroup
{
//using cscType = execplan::CalpontSystemCatalog::ColDataType;
const int16_t rgCommonSize = 8192;
/*
@ -455,7 +453,7 @@ public:
uint64_t getNullValue(uint32_t colIndex) const;
bool isNullValue(uint32_t colIndex) const;
template<typename T, uint8_t cscT, uint32_t len>
template<cscDataType cscDT, uint32_t len>
inline bool isNullValue_offset(uint32_t offset) const;
// when NULLs are pulled out via getIntField(), they come out with these values.
@ -820,7 +818,7 @@ inline void Row::setBinaryField1(T* value, uint32_t width, uint32_t colIndex)
template<typename T>
inline void Row::setBinaryField_offset(T* value, uint32_t width, uint32_t offset)
{
// WIP
// WIP Compare performance.
//memcpy(&data[offset], value, width);
*reinterpret_cast<T*>(&data[offset]) = *value;
}