bbde236be5
- delay construction of message buffer - OStringStream count() method to test if anything has been streamed STYLE: explicit use of std::ios_base in IOstreams - document the return information of set flag methods
133 lines
3.6 KiB
C++
133 lines
3.6 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 | www.openfoam.com
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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Copyright (C) 2017-2023 OpenCFD Ltd.
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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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Description
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Test null and counting output streams
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\*---------------------------------------------------------------------------*/
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#include "OCountStream.H"
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#include "SpanStream.H"
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#include "StringStream.H"
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#include "Fstream.H"
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#include "IOstreams.H"
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#include "argList.H"
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using namespace Foam;
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template<class OS>
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void generateOutput(OS& os)
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{
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for (label i = 0; i < 50; ++i)
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{
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os << 1002 << " " << "abcd" << " "
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<< "def" << " " << 3.14159 << ";\n";
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}
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}
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void printInfo(OSstream& os)
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{
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Info<< "name: " << os.name() << " : " << os.stdStream().tellp() << nl;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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// Main program:
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int main(int argc, char *argv[])
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{
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argList::addOption("write", "file", "test writing to file");
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#include "setRootCase.H"
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OCountStream cnt;
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OCharStream cstr;
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OStringStream sstr;
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ocountstream plain;
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generateOutput(cstr);
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generateOutput(sstr);
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generateOutput(cnt);
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generateOutput(plain);
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cnt.print(Info);
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Info<< "counter state: " << (cnt.stdStream().rdstate()) << nl
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<< "via char-stream: " << label(cstr.view().size()) << " chars" << nl
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<< "via string-stream: " << label(sstr.count()) << " chars" << nl
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<< "via ocountstream: " << plain.count() << " chars" << endl;
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fileName outputName;
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args.readIfPresent("write", outputName);
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if (outputName.size())
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{
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IOstreamOption streamOpt;
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if (outputName.has_ext("gz"))
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{
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outputName.remove_ext();
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streamOpt.compression(IOstreamOption::COMPRESSED);
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}
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OFstream os1(outputName, streamOpt);
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OFstream os2(nullptr); // A /dev/null equivalent
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OFstream os3("/dev/null");
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// Doubled output
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generateOutput(os1); generateOutput(os1);
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generateOutput(os2); generateOutput(os2);
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generateOutput(os3); generateOutput(os3);
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Info<< nl
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<< "doubled output" << nl;
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printInfo(os1);
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printInfo(os2);
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printInfo(os3);
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// Rewind and test single output
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os1.rewind(); generateOutput(os1);
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os2.rewind(); generateOutput(os2);
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os3.rewind(); generateOutput(os3);
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Info<< nl
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<< "single output" << nl;
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printInfo(os1);
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printInfo(os2);
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printInfo(os3);
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}
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Info<< "\nEnd\n" << endl;
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return 0;
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}
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// ************************************************************************* //
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