//
// C++ Implementation: srcuntabifier
//
// Description:
//
//
// Author: Lorenzo Bettini <http://www.lorenzobettini.it>, (C) 2004
//
// Copyright: See COPYING file that comes with this distribution
//
//
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "srcuntabifier.h"
#include <sstream>
#include <boost/regex.hpp>
namespace srchilite {
const boost::regex tabexp("[\\t]");
const string Untabifier::doPreformat(const string &s) {
 boost::sregex_iterator m1(s.begin(), s.end(), tabexp);
 boost::sregex_iterator m2;
 if (m1 == m2) {
 if (s[0] == '\n')
 n_ = 0; // reset char counter
 else
 n_ += s.size();
 return s;
 }
 std::ostringstream buffer;
 string prefix;
 string suffix;
 for (boost::sregex_iterator it = m1; it != m2; ++it) {
 prefix = it->prefix();
 suffix = it->suffix();
 if (prefix.size()) {
 buffer << prefix;
 n_ += prefix.size();
 }
 int nSpaces = nSpacesPerTab_ - n_ % nSpacesPerTab_;
 buffer << string(nSpaces, ' ');
 n_ += nSpaces;
 }
 if (suffix.size()) {
 buffer << suffix;
 n_ += suffix.size();
 }
 return buffer.str();
}
}
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