lyx_mirror/src/Variables.C

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/**
* \file Variables.C
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Lars Gullik Bj<EFBFBD>nnes
* \author Jean-Marc Lasgouttes
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "Variables.h"
#include "support/LRegex.h"
void Variables::set(string const & var, string const & val)
{
// We want to use const_iterator (Lgb)
Vars::iterator cit = vars_.find(var);
if (cit != vars_.end())
vars_.erase(var);
vars_[var] = val;;
}
string const Variables::get(string const & var) const
{
Vars::const_iterator cit = vars_.find(var);
if (cit != vars_.end())
return cit->second;
else
return string();
}
bool Variables::isSet(string const & var) const
{
Vars::const_iterator cit = vars_.find(var);
return (cit != vars_.end());
}
string const Variables::expand(string const & s) const
{
string str(s);
LRegex reg("\\$\\{\\(.*\\)\\}");
if (!reg.exact_match(str))
return str;
LRegex::MatchPair match;
string var;
do {
match = reg.first_match(str);
var = str.substr(match.first,match.second);
// we correct the match to take ${} in account.
str.replace(match.first - 2, match.second + 3, get(var));
} while (reg.exact_match(str));
return str;
}
#ifdef TEST
#include <iostream>
using std::endl;
using std::cout;
int main() {
Variables vars;
vars.set("x", "hello");
vars.set("y", "world");
cout << vars.expand("${x}") << endl;
}
#endif