mirror of
https://develop.openfoam.com/Development/openfoam.git
synced 2025-11-28 03:28:01 +00:00
2a925aeff3
- syntax as per Bourne/Korn shell
${parameter:+altValue}
If parameter is unset or null, nothing is substituted.
Otherwise the \c altValue is substituted.
683 lines
18 KiB
C
683 lines
18 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) 2011-2011 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 "stringOps.H"
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#include "typeInfo.H"
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#include "OSspecific.H"
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#include "OStringStream.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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//! \cond fileScope
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// Find the type/position of the ":-" or ":+" alternative values
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//
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static inline int findParameterAlternative
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(
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const std::string& s,
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std::string::size_type& pos,
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std::string::size_type endPos
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)
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{
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while (pos != std::string::npos)
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{
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pos = s.find(':', pos);
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if (pos != std::string::npos)
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{
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if (pos < endPos)
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{
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// in-range: check for '+' or '-' following the ':'
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const int altType = s[pos+1];
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if (altType == '+' || altType == '-')
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{
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return altType;
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}
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++pos; // unknown/unsupported - continue at next position
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}
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else
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{
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// out-of-range: abort
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pos = std::string::npos;
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}
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}
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}
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return 0;
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}
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//! \endcond
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Foam::string Foam::stringOps::expand
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(
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const string& original,
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const HashTable<string, word, string::hash>& mapping,
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const char sigil
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)
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{
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string s(original);
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return inplaceExpand(s, mapping);
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}
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Foam::string& Foam::stringOps::inplaceExpand
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(
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string& s,
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const HashTable<string, word, string::hash>& mapping,
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const char sigil
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)
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{
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string::size_type begVar = 0;
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// Expand $VAR or ${VAR}
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// Repeat until nothing more is found
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while
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(
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(begVar = s.find(sigil, begVar)) != string::npos
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&& begVar < s.size()-1
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)
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{
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if (begVar == 0 || s[begVar-1] != '\\')
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{
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// Find end of first occurrence
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string::size_type endVar = begVar;
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string::size_type delim = 0;
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// The type/position of the ":-" or ":+" alternative values
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int altType = 0;
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string::size_type altPos = string::npos;
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if (s[begVar+1] == '{')
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{
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endVar = s.find('}', begVar);
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delim = 1;
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// check for ${parameter:-word} or ${parameter:+word}
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if (endVar != string::npos)
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{
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altPos = begVar;
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altType = findParameterAlternative(s, altPos, endVar);
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}
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}
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else
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{
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string::iterator iter = s.begin() + begVar + 1;
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// more generous in accepting keywords than for env variables
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while
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(
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iter != s.end()
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&&
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(
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isalnum(*iter)
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|| *iter == '.'
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|| *iter == ':'
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|| *iter == '_'
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)
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)
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{
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++iter;
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++endVar;
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}
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}
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if (endVar == string::npos)
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{
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// likely parsed '${...' without closing '}' - abort
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break;
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}
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else if (endVar == begVar)
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{
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// parsed '${}' or $badChar - skip over
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begVar = endVar + 1;
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}
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else
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{
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const word varName
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(
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s.substr
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(
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begVar + 1 + delim,
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(
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(altPos == string::npos ? endVar : altPos)
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- begVar - 2*delim
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)
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),
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false
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);
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std::string altValue;
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if (altPos != string::npos)
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{
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// had ":-" or ":+" alternative value
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altValue = s.substr
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(
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altPos + 2,
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endVar - altPos - 2*delim
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);
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}
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HashTable<string, word, string::hash>::const_iterator fnd =
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mapping.find(varName);
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if (fnd != HashTable<string, word, string::hash>::end())
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{
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if (altPos != string::npos && altType == '+')
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{
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// was found, use ":+" alternative
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s.std::string::replace
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(
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begVar,
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endVar - begVar + 1,
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altValue
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);
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begVar += altValue.size();
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}
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else
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{
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// was found, use value
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s.std::string::replace
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(
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begVar,
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endVar - begVar + 1,
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*fnd
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);
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begVar += (*fnd).size();
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}
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}
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else if (altPos != string::npos && altType == '-')
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{
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// was not found, use ":-" alternative
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s.std::string::replace
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(
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begVar,
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endVar - begVar + 1,
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altValue
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);
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begVar += altValue.size();
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}
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else
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{
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// substitute with nothing, also for ":+" alternative
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s.std::string::erase(begVar, endVar - begVar + 1);
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}
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}
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}
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else
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{
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++begVar;
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}
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}
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return s;
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}
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Foam::string Foam::stringOps::expand
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(
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const string& original,
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const dictionary& dict,
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const char sigil
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)
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{
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string s(original);
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return inplaceExpand(s, dict, sigil);
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}
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Foam::string& Foam::stringOps::inplaceExpand
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(
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string& s,
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const dictionary& dict,
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const char sigil
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)
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{
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string::size_type begVar = 0;
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// Expand $VAR or ${VAR}
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// Repeat until nothing more is found
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while
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(
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(begVar = s.find(sigil, begVar)) != string::npos
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&& begVar < s.size()-1
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)
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{
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if (begVar == 0 || s[begVar-1] != '\\')
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{
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// Find end of first occurrence
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string::size_type endVar = begVar;
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string::size_type delim = 0;
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if (s[begVar+1] == '{')
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{
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endVar = s.find('}', begVar);
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delim = 1;
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}
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else
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{
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string::iterator iter = s.begin() + begVar + 1;
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// more generous in accepting keywords than for env variables
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while
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(
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iter != s.end()
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&&
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(
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isalnum(*iter)
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|| *iter == '.'
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|| *iter == ':'
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|| *iter == '_'
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)
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)
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{
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++iter;
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++endVar;
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}
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}
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if (endVar == string::npos)
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{
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// likely parsed '${...' without closing '}' - abort
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break;
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}
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else if (endVar == begVar)
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{
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// parsed '${}' or $badChar - skip over
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begVar = endVar + 1;
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}
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else
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{
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const word varName
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(
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s.substr
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(
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begVar + 1 + delim,
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endVar - begVar - 2*delim
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),
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false
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);
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// lookup in the dictionary
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const entry* ePtr = dict.lookupEntryPtr(varName, true, true);
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// if defined - copy its entries
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if (ePtr)
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{
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OStringStream buf;
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if (ePtr->isDict())
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{
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ePtr->dict().write(buf, false);
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}
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else
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{
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// fail for other types
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dynamicCast<const primitiveEntry>
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(
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*ePtr
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).write(buf, true);
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}
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s.std::string::replace
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(
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begVar,
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endVar - begVar + 1,
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buf.str()
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);
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begVar += buf.str().size();
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}
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else
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{
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// not defined - leave original string untouched
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begVar = endVar + 1;
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}
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}
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}
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else
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{
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++begVar;
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}
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}
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return s;
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}
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Foam::string Foam::stringOps::expand
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(
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const string& original,
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const bool allowEmpty
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)
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{
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string s(original);
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return inplaceExpand(s, allowEmpty);
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}
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Foam::string& Foam::stringOps::inplaceExpand
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(
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string& s,
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const bool allowEmpty
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)
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{
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string::size_type begVar = 0;
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// Expand $VARS
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// Repeat until nothing more is found
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while
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(
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(begVar = s.find('$', begVar)) != string::npos
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&& begVar < s.size()-1
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)
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{
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if (begVar == 0 || s[begVar-1] != '\\')
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{
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// Find end of first occurrence
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string::size_type endVar = begVar;
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string::size_type delim = 0;
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// The type/position of the ":-" or ":+" alternative values
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int altType = 0;
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string::size_type altPos = string::npos;
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if (s[begVar+1] == '{')
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{
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endVar = s.find('}', begVar);
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delim = 1;
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// check for ${parameter:-word} or ${parameter:+word}
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if (endVar != string::npos)
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{
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altPos = begVar;
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altType = findParameterAlternative(s, altPos, endVar);
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}
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}
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else
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{
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string::iterator iter = s.begin() + begVar + 1;
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while
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(
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iter != s.end()
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&& (isalnum(*iter) || *iter == '_')
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)
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{
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++iter;
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++endVar;
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}
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}
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if (endVar == string::npos)
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{
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// likely parsed '${...' without closing '}' - abort
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break;
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}
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else if (endVar == begVar)
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{
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// parsed '${}' or $badChar - skip over
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begVar = endVar + 1;
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}
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else
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{
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const word varName
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(
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s.substr
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(
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begVar + 1 + delim,
|
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(
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(altPos == string::npos ? endVar : altPos)
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- begVar - 2*delim
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)
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),
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false
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);
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std::string altValue;
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if (altPos != string::npos)
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{
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// had ":-" or ":+" alternative value
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altValue = s.substr
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(
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altPos + 2,
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endVar - altPos - 2*delim
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);
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}
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const string varValue = getEnv(varName);
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if (varValue.size())
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{
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if (altPos != string::npos && altType == '+')
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{
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// was found, use ":+" alternative
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s.std::string::replace
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(
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begVar,
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endVar - begVar + 1,
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altValue
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);
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begVar += altValue.size();
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}
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else
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{
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// was found, use value
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s.std::string::replace
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(
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begVar,
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endVar - begVar + 1,
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varValue
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);
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begVar += varValue.size();
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}
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}
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else if (altPos != string::npos)
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{
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// use ":-" or ":+" alternative values
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if (altType == '-')
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{
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// was not found, use ":-" alternative
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s.std::string::replace
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(
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begVar,
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endVar - begVar + 1,
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altValue
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);
|
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begVar += altValue.size();
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}
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else
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{
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// was not found, ":+" alternative implies
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// substitute with nothing
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s.std::string::erase(begVar, endVar - begVar + 1);
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}
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}
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else if (allowEmpty)
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{
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s.std::string::erase(begVar, endVar - begVar + 1);
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}
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else
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{
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FatalErrorIn
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(
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"stringOps::inplaceExpand(string&, const bool)"
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)
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<< "Unknown variable name '" << varName << "'"
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<< exit(FatalError);
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}
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}
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}
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else
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{
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++begVar;
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}
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}
|
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|
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if (!s.empty())
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{
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if (s[0] == '~')
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{
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// Expand initial ~
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// ~/ => home directory
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// ~OpenFOAM => site/user OpenFOAM configuration directory
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// ~user => home directory for specified user
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|
|
word user;
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fileName file;
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|
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if ((begVar = s.find('/')) != string::npos)
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{
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user = s.substr(1, begVar - 1);
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file = s.substr(begVar + 1);
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}
|
|
else
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{
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user = s.substr(1);
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}
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|
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// NB: be a bit lazy and expand ~unknownUser as an
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// empty string rather than leaving it untouched.
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// otherwise add extra test
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if (user == "OpenFOAM")
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{
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s = findEtcFile(file);
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}
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else
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{
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s = home(user)/file;
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}
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}
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else if (s[0] == '.')
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{
|
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// Expand a lone '.' and an initial './' into cwd
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if (s.size() == 1)
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{
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s = cwd();
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}
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else if (s[1] == '/')
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{
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s.std::string::replace(0, 1, cwd());
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}
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}
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}
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return s;
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}
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|
|
|
|
Foam::string Foam::stringOps::trimLeft(const string& s)
|
|
{
|
|
if (!s.empty())
|
|
{
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|
string::size_type beg = 0;
|
|
while (beg < s.size() && isspace(s[beg]))
|
|
{
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++beg;
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}
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|
|
if (beg)
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{
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return s.substr(beg);
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}
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}
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return s;
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}
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|
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Foam::string& Foam::stringOps::inplaceTrimLeft(string& s)
|
|
{
|
|
if (!s.empty())
|
|
{
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string::size_type beg = 0;
|
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while (beg < s.size() && isspace(s[beg]))
|
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{
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++beg;
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}
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|
|
if (beg)
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{
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s.erase(0, beg);
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}
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}
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return s;
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}
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|
|
|
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Foam::string Foam::stringOps::trimRight(const string& s)
|
|
{
|
|
if (!s.empty())
|
|
{
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|
string::size_type sz = s.size();
|
|
while (sz && isspace(s[sz-1]))
|
|
{
|
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--sz;
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|
}
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|
|
if (sz < s.size())
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|
{
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return s.substr(0, sz);
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}
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|
}
|
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return s;
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}
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|
|
|
|
Foam::string& Foam::stringOps::inplaceTrimRight(string& s)
|
|
{
|
|
if (!s.empty())
|
|
{
|
|
string::size_type sz = s.size();
|
|
while (sz && isspace(s[sz-1]))
|
|
{
|
|
--sz;
|
|
}
|
|
|
|
s.resize(sz);
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
|
|
Foam::string Foam::stringOps::trim(const string& original)
|
|
{
|
|
return trimLeft(trimRight(original));
|
|
}
|
|
|
|
|
|
Foam::string& Foam::stringOps::inplaceTrim(string& s)
|
|
{
|
|
inplaceTrimRight(s);
|
|
inplaceTrimLeft(s);
|
|
|
|
return s;
|
|
}
|
|
|
|
|
|
// ************************************************************************* //
|