icinga2/lib/icinga/macroprocessor.cpp

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/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* of the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
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#include "i2-icinga.h"
using namespace icinga;
String MacroProcessor::ResolveMacros(const String& str, const vector<Dictionary::Ptr>& macroDicts)
{
size_t offset, pos_first, pos_second;
offset = 0;
String result = str;
while ((pos_first = result.FindFirstOf("$", offset)) != String::NPos) {
pos_second = result.FindFirstOf("$", pos_first + 1);
if (pos_second == String::NPos)
BOOST_THROW_EXCEPTION(runtime_error("Closing $ not found in macro format String."));
String name = result.SubStr(pos_first + 1, pos_second - pos_first - 1);
String value;
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bool resolved = false;
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BOOST_FOREACH(const Dictionary::Ptr& macroDict, macroDicts) {
if (!macroDict || !macroDict->Contains(name))
continue;
String value = macroDict->Get(name);
result.Replace(pos_first, pos_second - pos_first + 1, value);
offset = pos_first + value.GetLength();
resolved = true;
break;
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}
if (!resolved)
BOOST_THROW_EXCEPTION(runtime_error("Macro '" + name + "' is not defined."));
}
return result;
}