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https://develop.openfoam.com/Development/openfoam.git
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f265b0484c
Enhancements - introduce intermediate layer for base64 foamVtk formatting - add encodedLength() method, which is useful for xml appended output
141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 2016-2017 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "foamVtkLegacyFormatter.H"
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#include "endian.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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const char* Foam::foamVtkLegacyFormatter::name_ = "BINARY";
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// * * * * * * * * * * * * Protected Member Functions * * * * * * * * * * * //
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void Foam::foamVtkLegacyFormatter::write
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(
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const char* s,
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std::streamsize n
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)
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{
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os().write(s, n);
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::foamVtkLegacyFormatter::foamVtkLegacyFormatter(std::ostream& os)
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:
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foamVtkFormatter(os)
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{}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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Foam::foamVtkLegacyFormatter::~foamVtkLegacyFormatter()
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{}
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// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
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const char* Foam::foamVtkLegacyFormatter::name() const
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{
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return name_;
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}
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const char* Foam::foamVtkLegacyFormatter::encoding() const
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{
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return name_;
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}
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void Foam::foamVtkLegacyFormatter::writeSize(const uint64_t ignored)
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{/*nop*/}
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void Foam::foamVtkLegacyFormatter::write(const uint8_t val)
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{
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// Legacy can only handle 32-bit integers.
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// Nonetheless promote to 'label' (32 or 64 bit) and deal with it later
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label copy(val);
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write(copy);
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}
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void Foam::foamVtkLegacyFormatter::write(const label val)
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{
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// std::cerr<<"label is:" << sizeof(val) << '\n';
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// Not entirely correct: the legacy format only supports 32-bit integers.
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// Either limit size for 64-bit label, or simply do not support for 64-bit.
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#ifdef WM_LITTLE_ENDIAN
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# if WM_LABEL_SIZE == 32
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uint32_t swapped = endian::swap32(val);
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write(reinterpret_cast<const char*>(&swapped), sizeof(uint32_t));
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# elif WM_LABEL_SIZE == 64
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uint64_t swapped = endian::swap64(val);
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write(reinterpret_cast<const char*>(&swapped), sizeof(uint64_t));
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#endif
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#else
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write(reinterpret_cast<const char*>(&val), sizeof(label));
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#endif
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}
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void Foam::foamVtkLegacyFormatter::write(const float val)
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{
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// std::cerr<<"float is:" << sizeof(val) << '\n';
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#ifdef WM_LITTLE_ENDIAN
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// De-reference in two stages to avoid the warning
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// dereferencing type-punned pointer will break strict-aliasing rules
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// [-Wstrict-aliasing]
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const uint32_t* ptr = reinterpret_cast<const uint32_t*>(&val);
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uint32_t swapped = endian::swap32(*ptr);
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write(reinterpret_cast<const char*>(&swapped), sizeof(uint32_t));
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#else
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write(reinterpret_cast<const char*>(&val), sizeof(float));
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#endif
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}
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void Foam::foamVtkLegacyFormatter::write(const double val)
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{
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// Legacy cannot support Float64 anyhow.
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// std::cerr<<"write double as float:" << val << '\n';
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float copy(val);
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write(copy);
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}
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void Foam::foamVtkLegacyFormatter::flush()
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{
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os()<< '\n';
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}
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// ************************************************************************* //
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