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cae7ce37f5
- there are some cases in which the C-style sprintf is much more
convenient, albeit problematic for buffer overwrites.
Provide a formatting version of Foam::name() for language
primitives that is buffer-safe.
Returns a Foam::word, so that further output will be unquoted, but
without any checking that the characters are indeed entirely valid
word characters.
Example use,
i = 1234;
s = Foam::name("%08d", i);
produces '00001234'
Alternative using string streams:
std::ostringstream buf;
buf.fill('0');
buf << setw(8) << i;
s = buf.str();
Note that the format specification can also be slightly more complex:
Foam::name("output%08d.vtk", i);
Foam::name("timing=%.2fs", time);
It remains the caller's responsibility to ensure that the format mask
is valid.
70 lines
2.0 KiB
C
70 lines
2.0 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 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 <cstdio>
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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// NOTE: with C++11 could consider variadic templates for a more general
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// sprintf implementation
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template<class PrimitiveType>
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Foam::word Foam::stringOps::name
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(
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const char* fmt,
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const PrimitiveType& val
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)
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{
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// same concept as GNU/BSD asprintf()
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// use snprintf with zero to determine the number of characters required
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int n = ::snprintf(0, 0, fmt, val);
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if (n > 0)
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{
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char buf[n+1];
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::snprintf(buf, n+1, fmt, val);
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buf[n] = 0;
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// no stripping desired
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return word(buf, false);
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}
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return word::null;
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}
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template<class PrimitiveType>
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Foam::word Foam::stringOps::name
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(
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const std::string& fmt,
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const PrimitiveType& val
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)
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{
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return stringOps::name(fmt.c_str(), val);
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}
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// ************************************************************************* //
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