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ENH: add stringOps namespace with a collection of string-related ops

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This commit is contained in:
Mark Olesen
2011-02-22 10:20:55 +01:00
parent 02f3459402
commit ba873744f3
8 changed files with 560 additions and 55 deletions
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66
src/OpenFOAM/primitives/strings/string/string.C
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@ -96,75 +96,79 @@ Foam::string& Foam::string::replaceAll
// Expand all occurences of environment variables and initial tilde sequences
Foam::string& Foam::string::expand(const bool recurse, const bool allowEmptyVar)
{
size_type startEnvar = 0;
size_type begVar = 0;
// Expand $VARS
// Repeat until nothing more is found
while
(
(startEnvar = find('$', startEnvar)) != npos
&& startEnvar < size()-1
(begVar = find('$', begVar)) != npos
&& begVar < size()-1
)
{
if (startEnvar == 0 || operator[](startEnvar-1) != '\\')
if (begVar == 0 || operator[](begVar-1) != '\\')
{
// Find end of first occurrence
size_type endEnvar = startEnvar;
size_type nd = 0;
size_type endVar = begVar;
size_type delim = 0;
if (operator[](startEnvar+1) == '{')
if (operator[](begVar+1) == '{')
{
endEnvar = find('}', startEnvar);
nd = 1;
endVar = find('}', begVar);
delim = 1;
}
else
{
iterator iter = begin() + startEnvar + 1;
iterator iter = begin() + begVar + 1;
while (iter != end() && (isalnum(*iter) || *iter == '_'))
while
(
iter != end()
&& (isalnum(*iter) || *iter == '_')
)
{
++iter;
++endEnvar;
++endVar;
}
}
if (endEnvar != npos && endEnvar != startEnvar)
if (endVar != npos && endVar != begVar)
{
string enVar = substr
string varName = substr
(
startEnvar + 1 + nd,
endEnvar - startEnvar - 2*nd
begVar + 1 + delim,
endVar - begVar - 2*delim
);
string enVarString = getEnv(enVar);
string varValue = getEnv(varName);
if (enVarString.size())
if (varValue.size())
{
if (recurse)
{
enVarString.expand(recurse, allowEmptyVar);
varValue.expand(recurse, allowEmptyVar);
}
std::string::replace
(
startEnvar,
endEnvar - startEnvar + 1,
enVarString
begVar,
endVar - begVar + 1,
varValue
);
startEnvar += enVarString.size();
begVar += varValue.size();
}
else if (allowEmptyVar)
{
std::string::replace
(
startEnvar,
endEnvar - startEnvar + 1,
begVar,
endVar - begVar + 1,
""
);
}
else
{
FatalErrorIn("string::expand(const bool, const bool)")
<< "Unknown variable name " << enVar << '.'
<< "Unknown variable name " << varName << '.'
<< exit(FatalError);
}
}
@ -175,7 +179,7 @@ Foam::string& Foam::string::expand(const bool recurse, const bool allowEmptyVar)
}
else
{
startEnvar++;
++begVar;
}
}
@ -191,10 +195,10 @@ Foam::string& Foam::string::expand(const bool recurse, const bool allowEmptyVar)
word user;
fileName file;
if ((startEnvar = find('/')) != npos)
if ((begVar = find('/')) != npos)
{
user = substr(1, startEnvar - 1);
file = substr(startEnvar + 1);
user = substr(1, begVar - 1);
file = substr(begVar + 1);
}
else
{
@ -215,7 +219,7 @@ Foam::string& Foam::string::expand(const bool recurse, const bool allowEmptyVar)
}
else if (operator[](0) == '.')
{
// Expand initial '.' and './' into cwd
// Expand a lone '.' and an initial './' into cwd
if (size() == 1)
{
*this = cwd();