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/*
* Distributed under the OSI-approved Apache License, Version 2.0. See
* accompanying file Copyright.txt for details.
*
* BP1Writer.tcc
*
* Created on: Apr 11, 2017
* Author: wfg
*/
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namespace adios
{
namespace format
{
// PRIVATE
template <class T, class U>
void BP1Writer::WriteVariableMetadataCommon(const Variable<T> &variable,
Stats<U> &stats,
capsule::STLVector &heap,
BP1MetadataSet &metadataSet) const
noexcept
{
stats.TimeIndex = metadataSet.TimeStep;
// Get new Index or point to existing index
bool isNew = true; // flag to check if variable is new
BP1Index &varIndex =
GetBP1Index(variable.m_Name, metadataSet.VarsIndices, isNew);
stats.MemberID = varIndex.MemberID;
// write metadata header in data and extract offsets
stats.Offset = heap.m_DataAbsolutePosition;
WriteVariableMetadataInData(variable, stats, heap);
stats.PayloadOffset = heap.m_DataAbsolutePosition;
// write to metadata index
WriteVariableMetadataInIndex(variable, stats, isNew, varIndex);
++metadataSet.DataPGVarsCount;
}
template <class T, class U>
void BP1Writer::WriteVariableMetadataInData(const Variable<T> &variable,
const Stats<U> &stats,
capsule::STLVector &heap) const
noexcept
{
auto &buffer = heap.m_Data;
// for writing length at the end
const std::size_t varLengthPosition = buffer.size();
buffer.insert(buffer.end(), 8, 0); // skip var length (8)
InsertToBuffer(buffer, &stats.MemberID); // memberID
WriteNameRecord(variable.m_Name, buffer); // variable name
buffer.insert(buffer.end(), 2, 0); // skip path
const std::uint8_t dataType = GetDataType<T>(); // dataType
InsertToBuffer(buffer, &dataType);
constexpr char no = 'n'; // isDimension
InsertToBuffer(buffer, &no);
// write variable dimensions
const std::uint8_t dimensions = variable.m_LocalDimensions.size();
InsertToBuffer(buffer, &dimensions); // count
// 27 is from 9 bytes for each: var y/n + local, var y/n + global dimension,
// var y/n + global offset, changed for characteristic
std::uint16_t dimensionsLength = 27 * dimensions;
InsertToBuffer(buffer, &dimensionsLength); // length
WriteDimensionsRecord(buffer, variable.m_LocalDimensions,
variable.m_GlobalDimensions, variable.m_Offsets, 18,
true);
// CHARACTERISTICS
WriteVariableCharacteristics(variable, stats, buffer, true);
// Back to varLength including payload size
const std::uint64_t varLength = buffer.size() - varLengthPosition +
variable.PayLoadSize() -
8; // remove its own size
CopyToBufferPosition(buffer, varLengthPosition, &varLength); // length
heap.m_DataAbsolutePosition +=
buffer.size() - varLengthPosition; // update absolute position to be
// used as payload position
}
template <class T, class U>
void BP1Writer::WriteVariableMetadataInIndex(const Variable<T> &variable,
const Stats<U> &stats,
const bool isNew,
BP1Index &index) const noexcept
{
auto &buffer = index.Buffer;
if (isNew == true) // write variable header (might be shared with
// attributes index)
{
buffer.insert(buffer.end(), 4, 0); // skip var length (4)
InsertToBuffer(buffer, &stats.MemberID);
buffer.insert(buffer.end(), 2, 0); // skip group name
WriteNameRecord(variable.m_Name, buffer);
buffer.insert(buffer.end(), 2, 0); // skip path
const std::uint8_t dataType = GetDataType<T>();
InsertToBuffer(buffer, &dataType);
// Characteristics Sets Count in Metadata
index.Count = 1;
InsertToBuffer(buffer, &index.Count);
}
else // update characteristics sets count
{
const std::size_t characteristicsSetsCountPosition =
15 + variable.m_Name.size();
++index.Count;
CopyToBufferPosition(buffer, characteristicsSetsCountPosition,
&index.Count); // test
}
WriteVariableCharacteristics(variable, stats, buffer);
}
template <class T, class U>
void BP1Writer::WriteVariableCharacteristics(const Variable<T> &variable,
const Stats<U> &stats,
std::vector<char> &buffer,
const bool addLength) const
noexcept
{
const std::size_t characteristicsCountPosition =
buffer.size(); // very important to track as writer is going back to
// this position
buffer.insert(buffer.end(), 5,
0); // skip characteristics count(1) + length (4)
std::uint8_t characteristicsCounter = 0;
// DIMENSIONS
std::uint8_t characteristicID = characteristic_dimensions;
InsertToBuffer(buffer, &characteristicID);
const std::uint8_t dimensions = variable.m_LocalDimensions.size();
if (addLength == true)
{
const std::int16_t lengthOfDimensionsCharacteristic =
24 * dimensions + 3; // 24 = 3 local, global, offset x 8 bytes/each
InsertToBuffer(buffer, &lengthOfDimensionsCharacteristic);
}
InsertToBuffer(buffer, &dimensions); // count
const std::uint16_t dimensionsLength = 24 * dimensions;
InsertToBuffer(buffer, &dimensionsLength); // length
WriteDimensionsRecord(buffer, variable.m_LocalDimensions,
variable.m_GlobalDimensions, variable.m_Offsets, 16,
addLength);
++characteristicsCounter;
// VALUE for SCALAR or STAT min, max for ARRAY
WriteBoundsRecord(variable.m_IsScalar, stats, buffer,
characteristicsCounter, addLength);
// TIME INDEX
WriteCharacteristicRecord(characteristic_time_index, stats.TimeIndex,
buffer, characteristicsCounter, addLength);
if (addLength == false) // only in metadata offset and payload offset
{
WriteCharacteristicRecord(characteristic_offset, stats.Offset, buffer,
characteristicsCounter);
WriteCharacteristicRecord(characteristic_payload_offset,
stats.PayloadOffset, buffer,
characteristicsCounter);
}
// END OF CHARACTERISTICS
// Back to characteristics count and length
CopyToBufferPosition(buffer, characteristicsCountPosition,
&characteristicsCounter); // count (1)
const std::uint32_t characteristicsLength =
buffer.size() - characteristicsCountPosition - 4 -
1; // remove its own length (4) + characteristic counter (1)
CopyToBufferPosition(buffer, characteristicsCountPosition + 1,
&characteristicsLength); // length
}
} // end namespace format
} // end namespace