C++ STL implementation of string search and replace

search_and_replace.cpp

void
search_and_replace( std::string& value, std::string const& search,
                    std::string const& replace ) 
{ 
    std::string::size_type next; 

    for ( next = value.find( search );      // Try and find the first match 
          next != std::string::npos;        // next is npos if nothing was found 
          next = value.find( search, next ) // search for the next match starting after 
                                            // the last match that was found. 
        ) { 
            // Inside the loop. So we found a match. 
            if ( next == 0 || value[next - 1] != '\r' ) {
                value.replace( next, search.length(), replace );  // Do the replacement. 
            }
            // Move to just after the replace. This is the point were we start 
            // the next search from. 
            next += replace.length();
    }
}